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LAMP CONTROL

Subclass of:

353 - Optics: image projectors

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Class / Patent application numberDescriptionNumber of patent applications / Date published
353087000 Lamp position adjustable 9
353086000 Dissolve type 1
20100141906METHOD FOR DRIVING A HIGH-PRESSURE GAS DISCHARGE LAMP OF A PROJECTOR SYSTEM - A method for driving a high-pressure gas discharge lamp of a projector system, which is suitable to produce and to supply to a light valve device during a projection interval (06-10-2010
Entries
DocumentTitleDate
20130083300DISCHARGE LAMP LIGHTING DEVICE AND PROJECTOR - A discharge lamp lighting device includes: a discharge lamp drive section which supplies electric power to a discharge lamp; a voltage detecting section which detects drive voltage of the discharge lamp; and a control section which controls the discharge lamp drive section, wherein the control section performs a first control process of controlling the discharge lamp drive section so that the electric power supplied to the discharge lamp is a first power based on the drive voltage detected by the voltage detecting section during a period when the first control process is previously performed, and a second control process of controlling the discharge lamp drive section so that the electric power supplied to the discharge lamp is a second power different from the first power based on the drive voltage detected by the voltage detecting section during a period when the second control process is previously performed.04-04-2013
20130083299PROJECTOR AND LIGHT SOURCE CONTROLLING METHOD THEREOF - A projector and a light source controlling method thereof are provided. The light source controlling method includes the following steps. The light source module is controlled to adjust a luminance of a projection light generated by a light source module starting from a low luminance. A power source voltage from an electronic device is detected to be equal to a threshold voltage or not. A power of the power source voltage is detected to be equal to a threshold power or not. When the power source voltage is equal to the threshold voltage and the power of the power source voltage is less than or equal to the threshold power, or when the power source voltage is greater than or equal to the threshold voltage and the power of the power source voltage is equal to the threshold power, the adjustment of the luminance of the projection light is stopped.04-04-2013
20130044297PROJECTION TYPE DISPLAY DEVICE AND CONTROL METHOD THEREOF - A projector which includes a light source, liquid crystal light valves, a dimming mechanism, an illumination optical system, a control circuit which determines an input light amount which is caused to be input to the liquid crystal light valve on the basis of an input image signal, outputs an output image signal which is decompressed according to the input light amount, and generates a first control signal which designates a first dimming rate of a high pressure mercury lamp and a second control signal which designates a second dimming rate of the dimming mechanism based on the input light amount, an illumination driving circuit which drives the light source on the basis of the first control signal, and a douser driving circuit which drives the douser on the basis of the second control signal.02-21-2013
20110199587PROJECTOR AND CONTROL METHOD FOR THE SAME - A safe, highly bright projector is to be implemented. A projector directs a light beam from a light source (08-18-2011
20090079947LIGHT SOURCE ASSEMBLY AND PROJECTOR HAVING SAME - A projector includes a lamp for providing a light beam, a reflective case for receiving and fixing the lamp, a cover, an image engine, and a projecting lens. The reflective case has an opening for allowing the light beam to be emitted therefrom. The cover includes a transparent portion covering the opening of the reflective case and a sidewall connected to the transparent portion. The sidewall is connected to the reflective case via screw threads. The image engine is positioned to receive light output from the lamp and configured for superimposing spatial information on the light to form image. The projecting lens is configured for receiving the light output of the image engine.03-26-2009
20090237622IMAGE DISPLAY DEVICE - When a position detector detects that the position of a spot on a projection plane designates a non-projection region, the level of a driving signal of a laser is corrected. Specifically, the correlation between the quantity of laser light detected by a light-receiving portion and the level of the driving signal of the laser in accordance with prescribed data is detected. Then, the characteristic value of the laser indicated by the detected correlation is compared with the characteristic value at room temperature stored beforehand to indicate the correlation between the quantity of light emitted by the laser at room temperature and the level of the driving signal. Then, based on the comparison result, the level of the driving signal of the laser in accordance with image data is corrected.09-24-2009
20130077061ILLUMINATOR AND DISPLAY UNIT - An illuminator includes: a light source section including a laser light source; an optical element through which a laser beam from the laser light source passes; a driving section oscillating the optical element; and a control section controlling, in a driving operation performed by the driving section, the driving operation to allow an oscillating amplitude value of the optical element in a startup period of the optical element to be equal to or less than the oscillating amplitude value of a steady-state operation period of the optical element that is subsequent to the startup period.03-28-2013
20090122274Video Projection System - A roll bar for protecting a projection mirror is attached so as to avoid exerting an external force to the projection mirror portion, direct thereto upon a turnover the projection apparatus. Further, in the case of no attachment of the roll bar for protecting the projection mirror portion, the projector apparatus is prevented from being started. Further, when the projector apparatus is carried away, the roller bar for protecting the projection mirror serves as a handle.05-14-2009
20130038843HIGH PRESSURE DISCHARGE LAMP BALLAST AND A METHOD FOR DRIVING A HIGH PRESSURE DISCHARGE LAMP BALLAST - The high pressure discharge lamp ballast of the present invention includes: power supply means for supplying an AC current to a lamp; and control means for cyclically changing a current value of the AC current to be supplied and a time interval between polarity inversions. The AC current has a cycle of a time period TL and a time period TS, and the power supply means is controlled by the control means to apply a half cycle of a first low frequency current and, immediately after that, apply one cycle of a high frequency current in the time period TL, the high frequency current in only the second half of the cycle or the entire cycle having a peak current value that is higher than a current value of the first low frequency current, and to repeat cycles of only a second low frequency current in the time period02-14-2013
20130038844LIGHT SOURCE DEVICE, METHOD OF DRIVING DISCHARGE LAMP, AND PROJECTOR - A light source device including a discharge lamp that has a first electrode and a second electrode opposed to each other in a hollow portion in which a discharge medium is enclosed; and a driving device that supplies a driving voltage to the first electrode and the second electrode, wherein the driving voltage is applied to the discharge medium through the first electrode and the second electrode such that the discharge medium emits light, wherein the driving device changes a relative potential of the first electrode with respect to the second electrode at a plurality of frequencies.02-14-2013
20130033684DISCHARGE LAMP LIGHTING DEVICE, PROJECTOR, AND METHOD OF CONTROLLING PROJECTOR - A discharge lamp lighting device according to the invention can reliably light a discharge lamp, and at the same time, prevent output of unnecessary high-voltage pulses with a simple circuit configuration. The discharge lamp lighting device includes a capacitor charged with a current from a direct-current power supply, a transformer adapted to output a starting pulse between electrodes of the discharge lamp in accordance with a discharge current flowing from the capacitor, a discharge control circuit adapted to switch ON/OFF the discharge current from the capacitor to the transformer, and a timing generation section adapted to switch the discharge control circuit to ON after a voltage between both ends of the capacitor has reached a reference voltage. The timing generation section can operate in accordance with a plurality of reference voltages.02-07-2013
20090141252PROJECTOR - A projector that projects video light corresponding to an image signal onto a display surface includes: a light source device that emits light; a housing that houses at least the light source device; a projection lens, that is, an optical element that transmits the video light projected onto the display surface and emits the video light toword the outside of the housing; a detecting unit that detects detection light supplied to the optical element; and a control unit that adjusts a light amount of the video light on the basis of a result of the detection by the detecting unit. The projector is set such that, when the optical element is in a normal setting state, the light amount density of the video light is equal to or lower than a predetermined value on an emission surface for emitting the video light of the optical element.06-04-2009
20130027674LIGHT SOURCE APPARATUS, DISCHARGE LAMP DRIVING METHOD, AND PROJECTOR - A light source apparatus includes a discharge lamp including a light-emitting container having a cavity in which a discharge medium is enclosed, and a pair of electrodes disposed such that respective tip portions thereof oppose each other in the cavity, and a driving unit that supplies a driving current to the pair of electrodes. The driving current is generated by modulating amplitude of alternating current having a frequency not lower than 1 kHz and not higher than 10 GHz, such that a first section and a second section in which the amplitude is smaller than in the first section are alternately repeated.01-31-2013
20120182531IMAGE PROJECTING APPARATUS - According to an aspect, an image projecting apparatus that projects an image includes a light source, a light emitting port, an emitting unit, and a control unit. The emitting unit causes the light emitted from the light source to be emitted from the light emitting port in such a manner that an emission direction of the light emitted from the light source can be varied. The control unit controls the light source and the emitting unit to switch between a first projection mode and a second projection mode. When the image projecting apparatus is placed on a horizontal plane, the emission direction is a front direction of the light emitting port or obliquely upward with respect to the horizontal plane in the first projection mode, and the emission direction is obliquely downward with respect to the horizontal plane in the second projection mode.07-19-2012
20130070215LIGHT SOURCE DEVICE, PROJECTOR, AND LIGHT SOURCE DEVICE FABRICATION METHOD - A light source device has a laser light emitting element including a cylinder portion, a flange portion and lead wire terminals, a collimator lens, a collimator lens holder including a collimator lens mounting depressed portion and a hole portion communicating with the depressed portion and accommodating the cylinder portion, and a light source element holder holding the laser light emitting element and including a lead wire outlet hole portion accommodating the lead wire terminals and penetrating from a front surface to a rear surface, and a front surface of the flange portion is fastened by the perimeter of a rear end of the hole portion to press the laser light emitting element against the front surface of the light source element holder to thereby fix the laser light emitting element to the light source element holder, an adhesion fixing member being filled in the lead wire outlet hole portion.03-21-2013
20130050662LIGHT SOURCE DEVICE, METHOD OF DRIVING DISCHARGE LAMP, AND PROJECTOR - A light source device includes a discharge lamp, and a discharge lamp driving device that supplies a driving current to a pair of electrodes. The discharge lamp driving device includes an alternating current supply unit that supplies an alternating current with a frequency equal to or higher than 1 kHz and equal to or lower than 10 GHz to the electrodes, and a direct current supply unit that supplies a direct current to the electrodes.02-28-2013
20130050661LIGHT SOURCE DEVICE, METHOD OF DRIVING DISCHARGE LAMP, AND PROJECTOR - A light source device includes a discharge lamp that has a first electrode and a second electrode opposed to each other in a hollow portion in which a discharge medium is enclosed and a driving device that supplies a driving voltage to the first electrode and the second electrode. The driving voltage is applied to the discharge medium through the first electrode and the second electrode such that the discharge medium emits light.02-28-2013
20130088693PROJECTOR - A projector includes: a discharge lamp; a discharge lamp drive section which supplies an electric power to the discharge lamp; and a control section which controls the discharge lamp drive section, wherein a period interposed between the switching timings which are temporally adjacent to each other starts in a first period and ends in a second period, wherein the control section controls, on the basis of a correlation pattern which indicates the correlation between a first electric power and a second electric power, the discharge lamp drive section to supply the first electric power to the discharge lamp in the first period and to supply the second electric power to the discharge lamp in the second period, and wherein the correlation pattern includes a pattern in which as the second electric power is decreased, the ratio of the first electric power to the second electric power is increased.04-11-2013
20100002201Modulized micro projection device - A modulized micro projection device is disclosed. The modulized micro projection device includes a case, a lens, an image module and a connection structure. The lens is disposed on one side of the case. The image module is disposed inside the case for projecting an image onto a screen through the lens. The connection structure is disposed on the outer surface of the case and holding a lighting module for providing light to the image module. Therefore, the lighting module is replaceable such that the luminance of the light can be changed through replacing the lighting module. Another modulized micro projection device is also disclosed.01-07-2010
20120218525LASER PROJECTOR AND METHOD OF PROCESSING SIGNAL THEREOF - There is disclosed a laser projector and a method of processing a signal thereof. The laser projector includes a plurality of laser sources configured to generate lasers, a controller configured to control each of the generated lasers to be incident on a specific region of a screen with a time difference, and a scanner configured to scan each of the lasers on the screen.08-30-2012
20090040474Image Display Device - An image display device includes a lighting section including a light source, a light modulation section that modulates light emitted from the lighting section in accordance with an image signal to form an image, and a scintillation reduction section that reduces the scintillation caused by the light emitted from the lighting section, and the scintillation reduction section reduces the scintillation so that a plurality of areas having different extents of reduction of the scintillation from each other is formed in the image.02-12-2009
20130162959Brightness-adjustable Light-emitting Device and Array and the Manufacturing Methods Thereof - The present invention belongs to the technical field of semiconductor devices and relates to a brightness-adjustable illuminator and an array and the manufacturing methods thereof. The illuminator is comprised of a semiconductor substrate, a MOSFET and a light-emitting diode that are located on the semiconductor substrate. The light-emitting diode (LED) and the control element (MOSFET) thereof are integrated on the same chip, so a single chip is capable of realizing the image transmission. An illuminator array may consist of a plurality of illuminators. Meanwhile, the invention also discloses a method for manufacturing the illuminator. Therefore, the projection equipment manufactured by the technology of the present invention has the advantages of small size, portability, low power consumption, etc. Furthermore, the use of the integrated circuit chip greatly simplifies the system of the projection equipment, reduces the production cost and greatly enhances the pixel quality and brightness.06-27-2013
20130162960Image Display Device - Provided is an image display device which carries out bi-directional line sequence scanning, and which appropriately corrects positioning misalignment of projection spots while efficaciously minimizing speckle noise. A laser controller unit sets waveform patterns when scanning in the forward direction, reflecting waveform patterns (GPT, BPT) about the time axis. The laser controller unit further sets waveform patterns when scanning in the reverse direction, reflecting the waveform patterns when scanning in the forward direction about the time axis. Waveform patterns (RPT, GPT, BPT) comprise drive start timings and drive end timings of laser sources within a pixel display period. The off period from the start timing of the pixel display period to the drive start timing and the off period from the drive end timing to the end timing of the pixel display period are set to be asymmetrical about the time axis.06-27-2013
20090237625DISCHARGE LAMP LIGHTING DEVICE, CONTROL METHOD FOR THE SAME, AND PROJECTOR - In at least one embodiment of the disclosure a discharge lamp lighting device includes a controller configured to control an AC conversion circuit to perform AC conversion control for controlling the timings at which a polarity of the discharge lamp driving AC current is reversed. The controller is configured to control the power control circuit to perform current control for controlling a current value of the DC current. The controller changes the cumulative energy supplied to each electrode of a discharge lamp in one cycle of the AC current for the discharge lamp driving in accordance with a cyclical pattern. The cyclical pattern includes a plurality of segmented periods during each of which the cumulative energy is maintained at a same level for a plurality of cycles of the AC current for the discharge lamp driving, and a level of the cumulative energy in at least two of the segmented periods differ from each other.09-24-2009
20090237623DISCHARGE LAMP STARTER, METHOD FOR CONTROLLING THE SAME, AND PROJECTOR - In at least one embodiment of the disclosure a discharge lamp lighting apparatus includes a controller configured to control an AC conversion circuit to perform AC conversion control for controlling the timings at which a polarity of the discharge lamp driving AC current is reversed. The controller is configured to control the power control circuit to perform current control for controlling a magnitude of the DC current. The controller changes the accumulated energy supplied to each electrode of a discharge lamp in one cycle of the discharge lamp driving AC current in accordance with a periodic pattern. The periodic pattern includes a plurality of segmented periods during each of which the accumulated energy is maintained at a same level for a plurality of cycles of the discharge lamp driving AC current, and a level of the accumulated energy in at least two of the segmented periods differ from each other.09-24-2009
20090237624DISCHARGE LAMP LIGHTING DEVICE, CONTROL METHOD FOR THE SAME, AND PROJECTOR - A discharge lamp lighting device includes: a power control circuit that outputs a DC current; an AC converter circuit that takes the DC current as its input, inverts polarity of the DC current between first polarity and second polarity in predetermined timing, and thereby generates and outputs an AC current for discharge lamp driving; and a control unit that carries out AC conversion control processing to the AC converter circuit to control polarity inversion timing of the AC current for discharge lamp driving, and current control processing to the power control circuit to control a current value of the DC current. The control unit carries out repair control to change, in a first cyclical pattern, cumulative energy supplied to each electrode of a discharge lamp during one cycle of the AC current for discharge lamp driving, in predetermined timing. The first cyclical pattern includes plural sectional periods in which the cumulative energy is maintained at the same value over plural cycles of the AC current for discharge lamp driving. The cumulative energy differs between at least two of the sectional periods.09-24-2009
20120113399SYSTEM FOR ADJUSTING IMAGE OF BEAM PROJECTOR USING CAMERA ATTACHED REMOTE CONTROLLER AND METHOD THEREOF - Provided is a system for adjusting an image of a beam projector using a camera attached remote controller and a method thereof. The system for adjusting images of a beam projector according to the present invention includes: a remote controller photographing test images projected on a screen and detecting pattern images from the photographed test images and generating control information including at least one parameter necessary to adjust the images through the detected pattern images; and a beam projector receiving the control information for adjusting images from the remote controller and adjusting the input image by using parameters included in the received control information and outputting them to the screen. Therefore, the present invention adjusts colors and geometrical shapes of images at a user's viewpoint, thereby making it possible to improve the satisfaction of user and implement the system in various forms.05-10-2012
20120113398PROJECTION DISPLAY APPARATUS - A projection display apparatus (05-10-2012
20080297739PROJECTOR AND DRIVING METHOD OF LIGHT SOURCE FOR PROJECTOR - A projector includes an discharge lamp which has a first electrode and a second electrode and emits light by generating discharge between the first and second electrodes, and a driving system which supplies power by alternating polarities of the first electrode and the second electrode. The driving system is operable in a restoration mode. The driving system melts surface layers of a tip and a surrounding area of the tip extending from a main body of one of the first and second electrodes, and expands a new tip on a tip area of the main body of the one electrode in the restoration mode.12-04-2008
20080297738Projector - The projector with at least two light sources for emission of light beams and a projection unit for controllable deflection of the light beams onto a projection surface has a control device to control light output of the light sources and a deflection of the projection unit, and also at least one digital delay element and at least one analog delay element for combined time delay of at least one of the light beams and/or deflection of the projection unit.12-04-2008
20080297737PROJECTOR, CONTROL METHOD, CONTROL PROGRAM, AND RECORDING MEDIUM - A projector to form image light by modulating light emitted from a light source according to image information and enlarges and projects the image light includes a projector main body with a light passing opening regulated by a blocking member, a reproduction device, and a control unit to control operation of projector components. The reproduction device reproduces information recorded on inserted recording medium. The control unit includes a startup information receiving section, a closed condition checking section, a medium judging section, and a light source controlling section. The light source controlling section executes immediate light turn-on control when the light passing opening is in the opened condition and image/video media exists.12-04-2008
20080297736PROJECTOR AND CONTROL METHOD THEREOF - Disclosed herein is a projector that can be loaded with lamps of a plurality of kinds, each of a plurality of the lamps loadable into the projector being given a lamp serial code formed by arranging lamp information including at least a minimum wattage and a maximum wattage of the lamp and a check sum in predetermined order, the projector including: a lamp power supply for driving the lamp loaded in the projector, the lamp power supply being provided in advance with a plurality of mode ranges each as a range from a minimum wattage to a maximum wattage of output of the lamp power supply, and one predetermined mode range of the plurality of mode ranges being freely set in the lamp power supply; and a control circuit for controlling the lamp power supply.12-04-2008
20120236267Screen Device and Rear Projection Apparatus - A screen device includes: a screen 09-20-2012
20110304834MOBILE ELECTRONIC DEVICE - It is a task to provide a mobile electronic device with high operability and high safety. The mobile electronic device includes an image projector that projects an image, a cabinet, an input unit that is disposed on the cabinet and detects an operation input by an operator, and a control unit that controls the operation of the image projector and the state of the input unit. The task is solved in such a manner that when a predetermined operation is detected by the input unit, the control unit stops emission of light from the image projector or reduces an amount of light emitted from the image projector.12-15-2011
20110279790PROJECTION DISPLAY DEVICE - A projection display device includes: a projection portion which enlarges and projects the light modulated by a imager portion; a control circuit; and a main body cabinet. The projection portion is formed by a projection lens portion into which the light from the imager portion is entered and a mirror portion which reflects the light having passed through the projection lens portion and lets the light travel toward a projection plane. The mirror portion is disposed so as to be shifted from an optical axis of the projection lens portion in a direction opposite to a direction in which the incident light from the projection lens portion is turned back. The control circuit portion is disposed in a space which is produced between the projection lens portion and the main body cabinet by a position gap between the projection lens portion and the mirror portion.11-17-2011
20090310091Electronic Device Incorporating Projector Device - An electronic device includes: a moving part; a projector device provided to the moving part; and a projection control unit that starts projection of an image by the projector device according to the state of the moving part, and the projection control unit starts projection of an image when a first time period has elapsed with the moving part in a predetermined state.12-17-2009
20100201956LIGHTING CONTROL DEVICE AND PROJECTOR - A projector includes: a light source; a light modulating device; a projection optical device; a lighting control device configured to control lighting of the light source and include a lighting unit; a control unit includes a storage section, a determination section, an information setting section configured to store problem related information regarding the problem in the storage section, a signal transmission section configured to indicate that the problem has occurred, and a detection unit configured to detect a driving state of the lighting control device; a control device configured to connect with the light control device and includes a main body side storage section, and an information acquisition section configured to acquire the problem related information when the problem occurrence signal is received and stores the problem related information in the main body side storage section.08-12-2010
20120099084LIGHT SOURCE CONTROL DEVICE, PROJECTOR, AND LIGHT SOURCE CONTROL METHOD - A light source control device and a light source control method each capable of preventing the scroll noise from occurring without being affected by the characteristics of a light modulation device, and a projector equipped with the light source control device are provided. The light source device includes a duty determination section adapted to determine a duty ratio, and a drive control section adapted to perform drive control of a plurality of solid-state light sources by generating a PWM signal having the duty ratio determined by the duty ratio determination section, and adapted to make a phase with which at least one of the solid-state light sources is driven different from a phase with which another of the solid-state light sources is driven.04-26-2012
20120105814LASER PROJECTION LIGHT - The laser project light has light block out means and safety sensor means to prevent people to direct to see the laser beams to harm the eyes. The current invention not only has such safety protection for AC powered laser project light but also apply for DC powered battery operated unit. Further incorporated UL listed has test certification LED light device to use same electric signal to drive the said Laser project light so not only has the Laser project light function, but also has LED light device function while people do not want to see the Laser project light performance can use switch means to turn off the laser beam.05-03-2012
20110285972FLEXIBLY CONNECTABLE DIGITAL MICROMIRROR DEVICE MODULE AND PROJECTING APPARATUS EMPLOYING SAME - A digital micromirror device module includes a flexible connection device, a digital micromirror device and a connecting interface. The flexible connection device includes a plurality of conducting wires and an external insulation layer, wherein the conducting wires are discretely arranged and encapsulated by the external insulation layer. The digital micromirror device unit is disposed on the external insulation layer of the flexible connection device and electrically connected with the conducting wires of the flexible connection device. The connecting interface is arranged at a lateral end of the flexible connection device and connected with the conducting wires.11-24-2011
20100103388DISCHARGE LAMP LIGHTING DEVICE, METHOD OF CONTROLLING DISCHARGE LAMP LIGHTING DEVICE, AND PROJECTOR - A discharge lamp lighting device includes: a power control circuit adapted to generate discharge lamp driving power; an alternating current conversion circuit adapted to execute polarity reversal on a direct current output from the power control circuit, thereby generating an alternating current; and a control section adapted to perform alternating current conversion control of controlling the polarity reversal timing of the alternating current, wherein the control section executes a steady drive process of executing the alternating current conversion control at a given frequency, a first low frequency drive process of executing the alternating current conversion control at a first low frequency driving frequency lower than the given frequency, and starting from a first polarity and ending with the first polarity, and a second low frequency drive process of executing the alternating current conversion control at a second low frequency driving frequency lower than the given frequency, and starting from a second polarity and ending with the second polarity.04-29-2010
20130010269PROJECTOR AND CONTROL METHOD FOR PROJECTOR - A projector can be connected in cascade to another projector. Either a first mode for the projector to operate as a leading projector in the cascade connection or a second mode for the projector to operate as a second or subsequent projector in the cascade connection is set. The projector is made available for use on authentication by an authentication unit or on reception of use permission information of the projector by a receiving unit.01-10-2013
20100033692DISCHARGE LAMP LIGHTING DEVICE AND IMAGE DISPLAY APPARATUS - A discharge lamp lighting device includes: a power converting circuit including a step-down chopper circuit (02-11-2010
20100002200METHOD AND AN OPERATION CONTROLLER FOR OPERATION OF A MERCURY VAPOUR DISCHARGE - The invention describes a method for operation of a mercury vapour discharge lamp (01-07-2010
20090153806Light source device, projector, and driving method of discharge lamp - A light source device is provided. The light source device has: a discharge lamp that emits light by discharge in an interelectrode space between a first electrode and a second electrode; a main mirror arranged at the first electrode side that reflects light flux generated by the discharge in the interelectrode space so as to emit the light flux to an area to be illuminated; 06-18-2009
20100123879LIGHT SOURCE MODULE - A light source module adapted to be used in a projection apparatus includes a first LED device, a second LED device, and a light switching element. The first LED device emits a first light beam along a first light path during a first time period. The second LED device emits a second light beam along a second light path during a second time period. The light switching element is disposed at an intersection of the first light path and the second light path for permitting one of the first light beam along the first light path and the second light beam along the second light path to be transmitted along a third light path.05-20-2010
20100128232HIGH-PRESSURE DISCHARGE LAMP LIGHT SOURCE DEVICE AND PROJECTOR - To stabilize the arc bright point position of a discharge lamp and suppress deformation of an electrode when an ultrahigh-pressure discharge lamp is operated with extremely low electric power, the lamp is operated by supplying power from a power supply device having a step-down chopper circuit and a full bridge circuit, a rectangular wave alternating current being supplied when it is operated with rated power or dimmed power (about 60 to 80% of rated power), a DC current being supplied during standby power operation of at most 0.5×P (W) with respect to the maximum operating power P (W). Moreover, the high-pressure discharge lamp light source device may be mounted on a projector for projecting images and the mode being changed to standby power operation when there is no change in an image signal, for example, for a prescribed period of time.05-27-2010
20090207385METHOD OF DRIVING DISCHARGE LAMP, DRIVING DEVICE, AND PROJECTOR - A method for driving a discharge lamp that supplies an AC current to a discharge lamp having a first electrode and a second electrode so as to produce discharge and to cause the discharge lamp to emit light includes, during a steady operation in which the AC current is supplied to the discharge lamp, changing a difference between the absolute values of average current values for two polarities during one cycle of the AC current in accordance with a predetermined pattern.08-20-2009
20110199588PROJECTOR, METHOD THAT ADJUSTS LUMINANCE OF PROJECTED IMAGE, AND PROGRAM - A projector that projects an image to a projection object using light emitted from a light source lamp, including a light adjustment sensor that measures the projection distance to the projection object and the intensity of reflected light from the projection object; a zoom position sensor that detects a zoom ratio; and a control section that adjusts the intensity of light emitted from the light source lamp based on the projection distance and the reflected light intensity measured by the adjustment sensor and the zoom ratio detected by the zoom position sensor so as to keep the luminance of a projection image displayed on the projection object constant.08-18-2011
20130215399DRIVING DEVICE, FLASHER DEVICE, AND PROJECTOR - A driving device includes a switching regulator and a timing controller. The switching regulator includes a switching element, a smoothing circuit including an inductor connected to the switching element, and a controller that turns on/off the switching element. The switching regulator converts input voltage to output voltage as output of the smoothing circuit by turning on/off the switching element. The timing controller controls the controller to operate and stop operating. The controller performs constant current control by feeding back inductor current, generating a PWM signal based on the fed-back current and a target value, and outputting the PWM signal to the switching element so that the inductor current approximates to the target value. When performing the constant current control, the controller sets the target value to a value different from a reference target value for a steady period.08-22-2013
20120293776PROJECTOR AND CONTROL METHOD THEREOF - A projector and method of controlling a projector, the projector including: a projection unit configured to project an image; first and second sensors which are disposed to be centered about the projection unit and configured to detect a motion of an object; and a control unit configured to control the projector if the motion of the object is detected by at least one of the first and the second sensors, wherein an axis of detection of the first sensor intersects an axis of detection of the second sensor.11-22-2012
20120293777LIGHT SOURCE DEVICE, PROJECTOR, AND LIGHT SOURCE DEVICE FABRICATION METHOD - A light source device which can prevent the removal of light source elements of a light source device within a projector casing, a projector and a light source fabrication method are provided. An excitation light shining device 11-22-2012
20090002644INVISIBLE SCANNING SAFETY SYSTEM - An invisible scanning safety system for use with laser projection systems that includes sensors monitoring less than the entire laser accessible region such that the region monitored is reduced to almost the absolute minimum, to thereby prevent unwarranted stoppages or disturbances in projection. The system may also monitor a 360 degree region around the lens of the laser projector, a wedge-shaped region, a pyramid-shaped region or a chimney-shaped region.01-01-2009
20090033882Projection device - A projection device comprises a first lens assembly movably disposed within a housing and configured to automatically activate the projection device to display an image in response to the first lens assembly being moved to an extended position relative to a second lens assembly.02-05-2009
20080273179Projection System and Method for Operating a Projection System - A method for operating a projection system (11-06-2008
20080291405PROJECTOR AND CONTROL METHOD OF PROJECTOR - A projector includes: an operation unit which receives operation by a user; a projection unit which projects light corresponding to an image signal; and a light intensity control unit which controls light intensity of the light projected by the projection unit. The light intensity control unit controls the light intensity in the order of reception of plural operations received by the operation unit from the user.11-27-2008
20080291404PROJECTOR AND CONTROL METHOD THEREOF - Disclosed herein is a projector that can be loaded with lamps of a plurality of kinds, each of a plurality of the lamps loadable into the projector being given a lamp serial code formed by arranging lamp information on the lamp and a check sum in predetermined order, the projector including: a control circuit for performing a clocking operation of a lamp timer for managing a use time of the lamp loaded in the projector; and a memory for storing information.11-27-2008
20100265473Projection Device - [Object]To provide a scan-type projection device that can lengthen a projecting time during a battery-powered operation.10-21-2010
20080239248DISPLAY ILLUMINATION APPARATUS - According to one embodiment, an illumination apparatus for a display includes first and second light sources, a lighting control unit which lights the first and second light sources successively, and a light path switching unit which switches light paths between each of the light sources and a projection lens among a first state in which light from the first light source of the first and second light sources is emitted to the projection lens, a second state in which light from the second light source of the first and second light sources is emitted to the projection lens, and a third state in which light from either one of the first and second light sources is emitted to the projection lens.10-02-2008
20100141904PROJECTOR AND CONTROL METHOD OF PROJECTOR - A projector which modulates light emitted from a light source and projects the modulated light, includes: a light source drive device which includes a light source drive unit for driving the light source and a light source control unit for controlling operation of the light source drive unit; and a control unit which includes a first communication unit connected with the light source control unit and a second communication unit connected with the light source drive unit, and allows the light source control unit to control operation of the light source drive unit by outputting control command from the first communication unit. The control unit determines whether the control corresponding to the control command has been normally performed, and outputs control information from the second communication unit to control the light source drive unit when it is determined that the control has not been normally performed.06-10-2010
20100141905CONTROLLABLE LIGHT ARRAY FOR PROJECTION IMAGE DISPLAY - Projection image displays for projecting virtual images into viewers' eyes include an array of separately activatable light sources located conjugate to a pupil of the displays. Illumination patterns produced within the arrays are symmetrically replicated within viewing eyeboxes of the displays. The illumination patterns can be varied to alter the size or position of the pupil within the eyeboxes.06-10-2010
20090122275IMAGE DISPLAY APPARATUS AND METHOD FOR DISPLAYING IMAGE - A projector that can prevent laser light from entering eyes is provided. A process that controls the projector includes the steps of detecting turning-on of power to the projector; detecting an input for adjusting the reflection direction of a two-axis galvanometer mirror; sending an instruction to reduce output from respective lasers, to an FPGA; setting signal values of the lasers respectively controlled by laser control circuits, to small values; determining whether a certain period of time has elapsed since an operation input is no longer performed on an operation panel; standing by the process for a certain period of time when the certain period of time has not elapsed since an operation input is no longer performed; and returning the signal values to a normal level when the certain period of time has elapsed since an operation input is no longer performed.05-14-2009
20100265472Methods and Systems for Laying Out a Design - A design layout projection system including a cube-like, solid case and housing compartment encasing several components including a laser projector system, a built-in computationally controlled system, multiple input and output connectors, a scaling knob, on/off switch and a power supply for projecting construction designs unto a work surface by inputting different types of input files, generating different output levels depending on the laser type used and optimizing and guiding the generated images unto a work surface.10-21-2010
20090231554DISCHARGE LAMP LIGHTING APPARATUS, METHOD FOR CONTROLLING THE SAME, AND PROJECTOR - A discharge lamp lighting apparatus includes a power control circuit that outputs a DC current, an AC conversion circuit to which the DC current is inputted, the AC conversion circuit repeatedly reversing the polarity of the DC current between a first polarity and a second polarity at predetermined timings to produce and output a discharge lamp driving AC current, and a controller that controls the AC conversion circuit to perform AC conversion control in which the timings at which the polarity of the discharge lamp driving AC current is reversed are controlled and controls the power control circuit to perform section current control in which the magnitude of the DC current is controlled in each polarity reverse timing section. In the section current control, the magnitude of the DC current is controlled in accordance with a periodic pattern in each of the polarity reverse timing sections to control the ratio of accumulated energy supplied to each electrode of the discharge lamp in the first half of the polarity reverse timing section to that in the second half of the polarity reverse timing section.09-17-2009
20090231553DISCHARGE LAMP LIGHTING DEVICE, CONTROL METHOD THEREOF, AND PROJECTOR - A discharge lamp lighting device includes: a power control circuit outputting DC current; an AC conversion circuit being supplied with the DC current and generating and outputting discharge-lamp driving AC current by inverting the polarity of the DC current at a predetermined time; and a control unit performing a duty ratio control process of controlling a duty ratio on the basis of a polarity inversion time of the discharge-lamp driving AC current on the AC conversion circuit and performing an interval current control process of controlling a current value of the DC current every polarity inversion time interval on the power control circuit. Here, the control unit performs the interval current control process so as to control a difference between an average value and a maximum value of the DC current of each polarity inversion time interval on the basis of a difference between the duty ratio and a predetermined reference duty ratio.09-17-2009
20090244496IMAGE DISPLAY DEVICE - A light-quantity adjusting function of a diaphragm used for light quantity control for improving the contrast of a projected image is controlled to cancel light quantity variation due to variation of the driving power of the light source for increasing the service life. This control keeps the quantity of light coming into a display element at a constant value and achieves both service life extension of the light source and image projection having no brightness fluctuation.10-01-2009
20090219493PROJECTION TYPE DISPLAY APPARATUS AND METHOD OF CONTROLLING THE SAME - According to one embodiment, a projection type display apparatus, which modulates a laser beam generated from a laser beam generating element according to an input video signal and projects the modulated laser beam onto a screen via a projection lens so as to display a video, sets a light quantity of the laser beam based on information representing a size of the screen so that an optical power of the laser beam per unit area on the screen falls within a range conforming to predetermined safety standards and brightness on the screen can be secured at a maximum, and controls the laser beam generating element so that the laser beam of the set light quantity is generated.09-03-2009
20090244497Projection Display Apparatus and Control Method Thereof - According to one embodiment, in a projection display apparatus, laser light which has been light-modulated based on a picture signal is reflected by a scanning element which can control a light reflection angle based on the picture signal, thereby scanning the same on a screen. The projection display apparatus includes a warning module which warns that laser light will be emitted from this time on when the laser light generating element is required to generate laser light, and a control module which causes the laser light generating element to generate laser light having a preset prescribed output power in a state where the warning has been made by the warning module.10-01-2009
20120105816PROJECTION DISPLAY DEVICE AND METHOD OF CONTROLLING THE SAME - A projection display device including: an image projection section configured to project an image toward a projection surface; an imaging section configured to shoot the image projected on the projection surface; a location specifying section configured to specify a location of a position indication light based on a shot image by the imaging section; and a display control section configured to set a projection range of the image to a range including an image area corresponding to the location specified by the location specifying section, and to alter the projection range of the image in accordance with the set projection range.05-03-2012
20100177285Optical scanning device, optical scanning image display device and retinal scanning display - An optical scanning device includes a light source which radiates light of intensity corresponding to an electric current supplied to the light source, an optical scanning part which is capable of scanning the light radiated from the light source in the predetermined direction, and a light source drive part which supplies a bias current of a predetermined current value to the light source and sequentially supplies an electric current corresponding to an image signal to the light source. The light source drive part stops or reduces the supply of the bias current to the light source during at least a predetermined period of an invalid scanning period where an image display is not performed.07-15-2010
20100157257HIGH PRESSURE DISCHARGE LAMP BALLAST, HIGH PRESSURE DISCHARGEP LAMP DRIVING METHOD, AND PROJECTOR - A high pressure discharge lamp ballast includes an AC power supply means for supplying a square wave alternating current to a high pressure discharge lamp having a bulb in which first and second electrodes are disposed so as to face each other. In the high pressure discharge lamp ballast, one modulation period (T06-24-2010
20100165305DISCHARGE LAMP LIGHTING DEVICE, PROJECTOR, AND CONTROL METHOD OF DISCHARGE LAMP LIGHTING DEVICE - A discharge lamp lighting device includes: a discharge lamp driving unit that supplies an AC driving current to a discharge lamp to drive the discharge lamp; a current detecting unit that detects the AC driving current supplied to the discharge lamp; and a control unit that controls the discharge lamp driving unit, wherein the control unit controls the discharge lamp driving unit after a predetermined time from the start of lighting driving operation of the discharge lamp on the basis of the behavior of the AC driving current detected by the current detecting unit at the predetermined time from the start of lighting driving operation of the discharge lamp.07-01-2010
20100165304PROJECTOR, LIGHT SOURCE LIGHTING DEVICE, AND METHOD OF CONTROLLING PROJECTOR - A projector adapted to modulate light emitted from a light source and project the light modulated, includes: a light source lighting device adapted to perform a starting operation for starting lighting of the light source; a past result information storing section adapted to store past result information when the light source lights due to the starting operation; and a starting condition adjustment section adapted to adjust an operation condition in the starting operation to be performed later, based on the past result information stored in the past result information storing section.07-01-2010
20100149495ILLUMINATOR, PROJECTION DISPLAY DEVICE, AND METHOD FOR DRIVING THE SAME - The invention provides a projection display device capable of appropriate light control depending on the kind of the image, the ambient brightness and so on, a method for driving the same, and an illuminator used in the same. The light flux of illumination can be adjusted on the basis of image information. The allowable light control range (dimming control) can be optimally set depending on the information (usage information) on the kind of viewed content, the brightness of viewing environment, the gain of a screen and the like.06-17-2010
20100238418DISCHARGE LAMP DRIVE DEVICE, DISCHARGE LAMP DRIVE METHOD, LIGHT SOURCE DEVICE, AND PROJECTOR - A discharge lamp drive device for driving a discharge lamp including a first electrode and a second electrode, include: a power supply unit which supplies alternating power to the discharge lamp by inputting alternating current between the first electrode and the second electrode, wherein the power supply unit includes a power reduction control unit which reduces the alternating power from a first level to a second level lower than the first level, and a duty ratio control unit which steppedly varies duty ratio of the alternating current in a predetermined period at the time of reduction of the alternating power.09-23-2010
20090273764System and Method for Power Control for Information Handling System Peripherals - An information handling system powers a projector through a communication interface, such as a USB interface, by selectively enabling first or second power levels through the communication interface. Initially, the communication interface provides a first minimal power level to run a controller on the projector. The controller communicates with the information handling system to establish approval for power at a second level, such as by communicating an identifier or a power level to the information handling system. The projector approves a power draw at the second power level based upon information received from the information handling system. The projector draws power at a second level that is adequate to fully operate the projector for presentation of visual images.11-05-2009
20090115974HIGH PRESSURE DISCHARGE LAMP OPERATION DEVICE, LIGHT SOURCE DEVICE, AND PROJECTION TYPE IMAGE DISPLAY DEVICE - Provided is a method for lighting a high pressure discharge lamp capable of increasing the life thereof. The lighting method is as follows. When the time elapse after lighting up the discharge lamp is within a predetermined condition (e.g. 5 minutes or less), constant current control is performed if the lamp voltage is lower than switching voltage (here, a first voltage value V05-07-2009
20090040476PROJECTOR APPARATUS AND CONTROL METHOD FOR PROJECTOR APPARATUS - According to one embodiment, a projector apparatus comprises a modulator configured to modulate light emitted from a light source in accordance with an image signal, a projection lens configured to project an optical image emitted from the modulator, a detector configured to detect whether or not an optical path of the projection lens is interrupted by a lens cover, a time measurement unit configured to measure an elapsed time after the optical path is interrupted by the lens cover, and a power controller configured to turn a power off when the time measured by the time measurement unit exceeds a predetermined time period.02-12-2009
20090040475Control System, Projector, Program, and Information Storage Medium - A control system includes a principal light source for outputting light to a light path used for image projection, an auxiliary light source for outputting light to the light path, and a control section for controlling light intensity of the auxiliary light source, and the control section performs one of control of setting combined light intensity obtained by combining light intensity of the principal light source and the light intensity of the auxiliary light source with each other in a certain range, or control of setting the combined light intensity to be equal to or higher than a predetermined value.02-12-2009
20090213341METHOD OF DRIVING DISCHARGE LAMP, DRIVING DEVICE, AND PROJECTOR - A method for driving a discharge lamp having a first electrode and a second electrode includes the steps of, in a situation where a tip portion of the first electrode becomes higher than a tip portion of the second electrode in temperature when power of the same amount is fed to the first and second electrodes during a steady operation, changing a difference between the absolute values of average current values for two polarities during one cycle of the AC current in accordance with a predetermined pattern, and setting an operation time ratio of the first electrode as an anode during one cycle so as to be smaller than an operation time ratio of the second electrode as an anode during one cycle.08-27-2009
20080297735LAMP DRIVING METHOD - A lamp driving method for a projection apparatus is provided. The projection apparatus has a light valve and a lamp. The lamp driving method includes adjusting a brightness of the lamp to different values according to multiple states of the light valve. The lamp driving method improves the energy efficiency of the projection apparatus.12-04-2008
20090015800PROJECTOR AND BRIGHTNESS ADJUSTING METHOD - A projector includes: a projector body, which has a light modulating device that modulates light emitted from a light source according to input image information to thereby form an optical image and a projection optical device that projects the formed optical image in an enlarged manner; an image output device that outputs the image information to the projector body; a connection mechanism for connecting the projector body and the image output device with each other such that the projector body and the image output device can rotate relative to each other; a rotation operation detecting unit that detects a relative rotation operation of the projector body and the image output device; and a control unit that controls the projector body and the rotation operation detecting unit. The control unit includes: a rotation operation recognition portion that recognizes whether or not the projector body and the image output device are in a relative rotation operation state on the basis of a detection result of the rotation operation detecting unit; and a brightness adjusting portion that adjusts the brightness of light emitted from the projection optical device when the rotation operation recognition portion has recognized that the projector body and the image output device are in the relative rotation operation state.01-15-2009
20090109409LIGHTING UNIT AND PROJECTION DISPLAY APPARATUS - A projection display apparatus 04-30-2009
20110128508Lighting apparatus for high-pressure discharge lamp and projector - A lighting apparatus for a high-pressure discharge lamp that has an electric discharge container made of quartz glass, and containing a pair of counter electrodes and a power supply unit that supplies AC current to the high-pressure discharge lamp. The power supply unit has a stationary power lighting mode and a modulated power lighting mode that supplies current having power less than power in the stationary power lighting mode. The modulated power lighting mode supplies a rectangular AC current having a first term and a second term. A mean high-frequency current value supplied to a first electrode is greater than a mean current value supplied to a second electrode in the first term. A current is supplied to the second electrode for a term longer than the half-cycle period in the second term, the current being lower than the mean high-frequency current value supplied to the first electrode.06-02-2011
20100302515PROJECTION-TYPE DISPLAY AND CONTROL THEREOF - A projection display device that includes a set of light source units (e.g., lasers or LEDs) and a control mechanism that monitors performance of each of the units, as well as external factors, e.g., time, ambient temperature, etc. is provided. The control mechanism may dynamically adjust each light source unit, for example, to maximize longevity. In operation, an optical modulator is configured to selectively transmit light produced by a subset of the light source units according to video data included in a video signal provided to the projection-type display device. A projection lens system is configured to project light transmitted by the optical modulator along a projection path. A sensor detects real time readings related to the performance of the set of light source units. In accordance with the readings, a control circuitry dynamically controls the laser set to dynamically vary the luminance of the set of light source units.12-02-2010
20110032493SAFETY INTERLOCK SYSTEM FOR A PROJECTOR SYSTEM - A safety interlock system for a projector system is provided. The projector system has a lamp, a controller and ballast for powering the lamp upon receipt of a lamp enable signal from the controller. The projector system further has a safety inter-lock system for deactivating the lamp in the event the lamp is not properly installed.02-10-2011
20090033885Projection apparatus and image projection changeover method - The present invention provides a projection apparatus, comprising: a light source; a spatial light modulator for modulating the incident light emitted from the light source; a spatial light modulator control unit for generating, from an inputted image signal, a control signal for driving the spatial light modulator; and a light source control unit for receiving data corresponding to the control signal for controlling the light source to operate in one of three states consisted of a driven state, a stopped state and a standby state on the basis of the data.02-05-2009
20090033884Projector - A projector that includes a laser beam source that outputs a laser beam that is modulated based on an image signal and a screen on which the light beam is projected. The projector also includes a scanning unit that scans the laser beam within a predetermined surface and a scan monitoring unit that monitors scanning of the scanning unit and outputs a result of the monitoring. The projector further includes a beam light supply stopping unit that controls the laser beam source so as to stop output of the laser beam based on the result of monitoring output by the scan monitoring unit.02-05-2009
20110242503Projection Device and Projection Light Source Control Method Thereof - A projection device and a projection light source control method thereof are disclosed. The project device comprises a signal detection module, a projector lamp, and a lamp driver module. The signal detection module is for determining whether an image signal is inputted, executing the normal mode upon determination of the image signal, and executing the power saving mode upon determination of no image signal. The projector lamp is used for emitting a projection light source. The lamp driver module is used for controlling an input voltage inputted to the project lamp. When the power saving mode is executed, the lamp driver module is used for controlling the input voltage to decrease the brightness of the projector lamp and controlling the brightness of the projector lamp to generate a fade-in brightness and a fade-out brightness periodically cycling between a minimum is brightness setting and a maximum brightness setting.10-06-2011
20090231552Lighting System and Method for Operating a Lighting System - A lighting system comprising a first light source, which is adapted to generate light signals of a first color, and at least one second light source, which is adapted to generate light signals of a second color, wherein the light sources are adapted to be driven so as to generate a predeterminable color sequence of individual colors, wherein the light sources are adapted to be operated by a common control unit and to be driven by said control unit in the sequence required for generating the predeterminable color sequence. The light sources are connected in parallel and are electrically coupled to an energy supply unit via a first circuit node in order to supply energy. The lighting system comprises a regulator unit for regulating the energy supply unit and coupled to the control unit via a signal line, and wherein the control unit is adapted to predetermine a desired energy output of the energy supply unit via the regulator unit, to be precise depending on the individual color within the color sequence.09-17-2009
20090323033DISCHARGE LAMP LIGHTING DEVICE AND IMAGE DISPLAY DEVICE - An output of a load voltage detector is read by an A/D converter, and a reference value Is and a switching frequency are decided by a microcomputer. In order that the decided switching frequency can be achieved, a SET signal is inputted from a switching frequency counting unit to a drive controller, and a switching element is turned on. When a current flowing through the switching element, which is detected by a resistor, exceeds the reference value Is of a reference arithmetic unit, a RESET signal is inputted from a current detector to the drive controller, and the switching element is turned off. Thereafter, the reference value Is and the switching frequency are set so that the switching element can be turned on at the next time at timing when a regenerative current of a diode turns to substantial zero. As described above, the switching frequency is controlled in response to a state of a discharge lamp while controlling the switching element to turn on at the timing when the regenerative current turns to substantial zero without bringing up a cost increase of a discharge lamp lighting device.12-31-2009
20090033883PROJECTION APPARATUS AND METHOD FOR ACTIVATING A PROJECTION APPARATUS - A projection apparatus includes an illuminating unit, an imaging unit, a lens unit, and a control unit. The illuminating unit includes a light source, and a light source driving module operable to drive the light source to provide an illumination beam. The imaging unit is operable so as to modulate the illumination beam into an image beam. The lens unit is disposed on an optical path of the image beam for projecting the image beam. The control unit is coupled electrically to the illuminating unit and the imaging unit. The control unit is configured to execute an activating thread for initializing the imaging unit after controlling initial driving of the light source by the light source driving module, and a monitoring thread for monitoring the light source driving module for a success signal that indicates successful provision of the illumination beam by the light source.02-05-2009
20120242965PROJECTOR - A projector includes: a discharge lamp; a discharge lamp driving unit that drives the discharge lamp by supplying a driving power to the discharge lamp through supply of a driving current thereto; and a control unit that controls the discharge lamp driving unit based on plural operating modes in which maximum values of the driving power are different from one another, wherein the control unit switches the operating mode through a transition period and controls the discharge lamp driving unit so that an average value of a frequency of the driving current in the former half of the transition period becomes larger than an average value of a frequency of the driving current in the latter half of the transition period.09-27-2012
20100053570PROJECTION LENS AND PROJECTION DISPLAY DEVICE USING THE SAME - Disclosed are a projection lens that has a small size, a simple inner focus structure, a high optical performance, and a wide angle of view of about 75 degrees or more, and a projection display device.03-04-2010
20080266529PUPIL MISMATCH IN A COLLIMATED DISPLAY SYSTEM - An image projection system has a first lens with a defined entrance pupil. An image source has an image field and a defined exit pupil. The exit pupil of the image source is configured such that the exit pupil of the image source underfills the entrance pupil of the lens for portions of the image source that are not in the center portion of the image field.10-30-2008
20100134766LIGHTING DEVICE, LIGHT SOURCE DEVICE, PROJECTOR, AND DISCHARGE LAMP LIGHTING METHOD - A lighting device that lights a discharge lamp which contains a pair of electrodes and light emission substance including mercury, includes: a first terminal connected with the electrode to which mercury easily adheres, and a second terminal connected with the electrode to which mercury is difficult to adhere; a setting unit which sets AC current supplied to the first and second terminals in a starting period from insulation break down of the discharge lamp until start of discharge between the tips of the pair of the electrodes; and a supplying unit which supplies AC current set by the setting unit to the first and second terminals, wherein the setting unit sets AC current such that the half-cycle electric quantity supplied to the first terminal becomes larger than the half-cycle electric quantity supplied to the second terminal in the initial term of the starting period under the condition in which the first terminal initially operates as cathode, and that the half-cycle electricity quantities supplied to the first and second terminals become substantially equal in the final term of the starting period.06-03-2010
20100134765METHOD OF DRIVING A DISCHARGE LAMP IN A PROJECTION SYSTEM, AND DRIVING UNIT - The invention describes a method of driving a discharge lamp (06-03-2010
20120120374PROJECTOR AND METHOD FOR OPERATING THE PROJECTOR - A projector and a method for operating the projector are provided, in which an optical module alternately emits first image information and second image information at intervals, and an optical path switch is installed to be switched on or off from a traveling path of the first and second image information emitted from the optical module.05-17-2012
20110043771High pressure discharge lamp lighting apparatus and projector - A high pressure discharge lamp lighting apparatus that comprises a power supply apparatus that supplies a rectangle wave alternating current to the high pressure discharge lamp for lighting, such that when the lamp is operated by electric power of 0.5×P (W) or less, when maximum operation power P (W) in a steady lighting state except an initial lighting period that is immediately after starting, where a first polarity driving period of a rectangle wave alternating current is Ta (seconds), and where a second polarity driving period is Tb (seconds) an operation is performed so that the second polarity driving period Tb is 5 ms or less (Tb≦5 ms) and a ratio Tb/Ta of these two driving periods is 0.1 or less (Tb/Ta≦0.1).02-24-2011
20080246926Method For Operating a High-Intensity Discharge Lamp, Lamp Driver and Projection System - There is described a method for operating a high-intensity discharge lamp (10-09-2008
20080246927PROJECTION DISPLAY APPARATUS - A projection display apparatus includes: a light amount sensor which detects an amount of light emitted from an array light source; a deterioration rate calculator which acquires an amount of light of a measurement target light source from the amount of light detected by the light amount sensor; a reference light amount storage which stores a reference amount of light of an amount of light emitted from plurality of solid state light sources, for each of the solid state light sources; and a light source controller which controls the amount of light emitted from the plurality of solid state light sources for each of the solid state light sources, and the deterioration rate calculator determines whether the measurement target light source has deteriorated, in accordance with a result of a comparison between the amount of light detected by the light amount sensor, and the reference amount of light.10-09-2008
20110128509LIGHT SOURCE DEVICE, PROJECTION APPARATUS, AND PROJECTION METHOD - A light source device includes a plurality of semiconductor light source elements, and a drive control section configured to cyclically supply a power signal with a sawtooth pulse waveform in which a crest value at the rise time is larger than a crest value at the fall time to each of the plurality of semiconductor light source elements by time division to thereby light-emission-drive the semiconductor light source elements.06-02-2011
20110051102LIGHT SOURCE UNIT AND PROJECTOR - With a view to providing a light source unit which can emit light source light of high luminance and high intensity even in the small quantity of excitation light, there is provided a light source unit including an excitation light source for emitting light in a blue wavelength band, a fluorescent wheel, a light emitting device for emitting light in a red wavelength band and a light guiding optical system for guiding light emitted from the fluorescent wheel and the light emitting device to a light guiding device, wherein the fluorescent wheel is made up of a fluorescent area where a green fluorescent material layer for emitting fluorescent light in a green wavelength band is disposed and a diffuse area for converting light emitted from the excitation light source into diffuse light of which directivity is weak are disposed end to end in a circumferential direction, and wherein the green fluorescent material layer is such that a concentration of weight content of the green fluorescent material in the green fluorescent material layer relative to the fluorescent material layer and a thickness thereof are determined so that a luminescent intensity of fluorescent light emitted from the green fluorescent material layer is enhanced.03-03-2011
20110051101PROJECTION LENS AND PROJECTION-TYPE DISPLAY APPARATUS - A projection lens consists of first and second les groups and a stop. The first lens group is formed of a negative lens. The second lens group is formed of three positive lenses and a negative lens. The stop is disposed between the first and second lens groups or in the second lens group. The first and second lens groups are arranged in order from a magnification side. The projection lens is telecentric on a reduction side. The projection lens is configured to satisfy the following conditional expressions (1) and (2):03-03-2011
20110051100METHOD FOR COMPENSATING LIGHT REFLECTION OF PROJECTION FRAME AND PROJECTION APPARATUS - A method for compensating light reflection of a projection frame and a projection apparatus is provided. In the method, a preset frame is projected by the projection apparatus. Next, a spectrum of a light reflected by the projected preset frame is detected and compared with an original spectrum of the preset frame. A light characteristic value of the projected preset frame is then adjusted accordingly, so as to compensate a difference between the detected spectrum of the reflected light and the original spectrum.03-03-2011
20110096300LIGHT SOURCE UNIT AND PROJECTOR - To provide a light source unit which prevents a reduction of light emitting efficiency in a luminescent material layer and a projector, a projector includes a light source unit, a display device and a projector control device, the light source unit includes an excitation light shining device, a luminescent wheel on which a luminescent material layer is laid circumferentially which receives the excitation light to emit luminescent light of a predetermined wavelength band, two types of light source devices for emitting light rays of wavelength bands which are different from the predetermined wavelength band, and a light source control device for controlling individually the emission of light by the excitation light shining device and the two types of light source devices and for controlling the rotating speed of the luminescent wheel in accordance with a period of time when the excitation light shining device is turned on.04-28-2011
20100177286LIGHTING METHOD AND LIGHTING APPARATUS FOR A HIGH PRESSURE DISCHARGE LAMP, A HIGH PRESSURE DISCHARGE LAMP APPARATUS, AND A PROJECTION-TYPE IMAGE DISPLAY APPARATUS - After discharge has begun in a high pressure discharge lamp, constant current control is performed so a lamp current becomes 4 [A]. Then, the current supplied to a pair of electrodes in the lamp is controlled so an electrode tip temperature t [degrees C.] at this time and an electrode tip temperature T [degrees C.] during stable lighting satisfy the relationship t [degrees C.]<=1.1 T [degrees C.]. When a power of the lamp reaches a rated power value, power control is changed to constant power control. This method enables suppressing an excessive rise in the temperature of the electrode tips in an initial lighting interval from lighting commencement until stable lighting, thereby preventing an increase in arc length due to melting of the electrode tips. Accordingly, illuminance does not readily decrease, particularly in a lamp unit including a high pressure discharge lamp mounted to a reflecting mirror.07-15-2010
20120206698PROJECTOR - A projector comprising: a discharge lamp; a discharge lamp drive unit that drives the discharge lamp by supplying drive power to the discharge lamp; and a control unit that has a first mode and a second mode as operation modes and controls the discharge lamp drive unit according to the operation modes, wherein the control unit controls the discharge lamp drive unit to supply first power as the drive power to the discharge lamp when the operation mode is the first mode, and controls the discharge lamp drive unit to supply the drive power to the discharge lamp while changing the drive power in a range equal to or less than second power smaller than the first power and equal to or more than third power smaller than the second power when the operation mode is the second mode.08-16-2012
20110149253Projection Image Display Apparatus with Multiple Light Sources - When a lamp to be used as a light source is switched to a first lamp from a second lamp, a control unit switches the state of a drive mirror to a state of transmitting light generated by a first lamp to a liquid crystal panel and sets a relay circuit to an I side to thereby switch the destination of electric power from a power supply from the second lamp to the first lamp. The control unit further reads an accumulated lighting period of the first lamp from a first memory in a first lamp unit and reads an accumulated lighting period of the second lamp from a second memory in a second lamp unit and calculates a target value of electric power to be supplied to the first lamp in accordance with respective accumulated lighting periods of the lamps.06-23-2011
20100020293PROJECTION VARIABLE FOCUSING LENS AND PROJECTION DISPLAY DEVICE - Disclosed is a projection variable focusing lens and a projection display device that has a reduction side which is telecentric, a high magnifying power, a small size, a light weight, and a low manufacturing cost and is capable of correcting all aberrations occurring when power varies with good balance.01-28-2010
20110304831PROJECTOR - There is provided a projector comprising, a light source unit having a laser light emitter and a projection light producing device for converting the laser light into projection light, a display unit and a light guiding optical system which forms a projection optical path along which light from the light source unit is guided to the display device, the projector comprising a partial light separation unit which reflects or transmits part of light emitted from the projection light converting device of the light source unit so as to separate the part of the light to an optical path which is different from the projection optical path, a photosensor which is disposed on the optical path which is separated and changed by the partial light separation unit, a light intensity determination unit which detects an light intensity of the laser light which is separated by the partial light separation unit so as to determine whether or not the light intensity exceeds a threshold, and a light source control unit which stops the emission of the laser light emitter based on the result of the determination of the light intensity determination unit.12-15-2011
20110304833MOBILE ELECTRONIC DEVICE - It is a task to provide a mobile electronic device with high operability and high safety. The mobile electronic device includes an image projector that projects an image, a detector that detects a specific change in an irradiation area of light irradiated from the image projector or in a predetermined area including the irradiation area, and a control unit that controls the operation of the image projector. The task is solved in such a manner that when the detector detects the specific change, the control unit causes the image projector to stop emission of light therefrom, or to reduce an amount of light emitted therefrom.12-15-2011
20110304832OPTICAL AXIS ADJUSTMENT DEVICE, METHOD FOR ADJUSTING OPTICAL AXIS AND PROJECTION-TYPE DISPLAY APPARATUS - A projection type display apparatus in which an inclination and a positional deviation of optical axes among a plurality of light sources can be easily corrected to obtain a high quality projection image. Green, blue and red laser beams emitted from light sources are converted into collimated beams by condenser lenses, and the positions and angles of the optical axes of the beams of the three colors are evaluated by position detection imaging device and angle detection imaging device, respectively. The positions and angles of the light sources are adjusted by respective actuators so that the positions and angles of the optical axes match each other. Consequently, the laser beams emitted from the light sources can be combined with high accuracy to thereby realize a high definition projection type display apparatus.12-15-2011
20110063584High pressure discharge lamp lighting apparatus and projector - A discharge lamp lighting apparatus comprises a discharge lamp and a power supply the discharge lamp can be switched between a steady power lighting mode, which drives the discharge lamp by an alternating current in which first and second polarities are repeated by turns, and a low power lighting mode, which drives the discharge lamp at 50% or less of the alternating current of the steady power lighting mode, and the alternating current comprises a first time unit, which has a time width t03-17-2011
20110317133METHOD AND ELECTRONIC OPERATING DEVICE FOR OPERATING A GAS DISCHARGE LAMP AND PROJECTOR - A method for operating a gas discharge lamp featuring a gas discharge lamp burner and a first and a second electrode, wherein the electrodes have a nominal electrode separation in the gas discharge lamp burner before their first activation and said nominal separation is correlated to the lamp voltage. The method may include checking whether the off-time, corresponding to the time duration between two DC voltage phases, has expired; and if the off-time has expired, omitting commutations or applying pseudo-commutations for a predefined time duration which depends on the lamp voltage in such a way that a time duration of the omission of at least one of commutations and application of pseudo-commutations is predefined for each lamp voltage.12-29-2011
20120044466PROJECTOR - A projector includes a discharge lamp, a discharge lamp driver that supplies the discharge lamp with a current, a voltage detector that detects a drive voltage for driving the discharge lamp, and a controller that controls the discharge lamp driver. The controller carries out a first control process in which the discharge lamp driver is so controlled that an absolute magnitude of the drive current in a first period is smaller than that in a second period and that an AC current is supplied to the discharge lamp in a second period. The first control process includes a first electric power control process in which first average drive electric power is determined based on the voltage detected by the voltage detector and a current is supplied to the discharge lamp in such a way that average drive electric power is set at the first average drive electric power.02-23-2012
20120044467PROJECTOR - A projector for projecting an image light including: a laser light source for emitting a laser beam; a light modulator for modulating the laser beam to generate the image light; a projection portion for projecting the image light; a detector for detecting a fixation degree of the projector; and a controller for controlling the power of the image light on the basis of the fixation degree.02-23-2012
20120044465LIGHT SOURCE UNIT, ILLUMINATION DEVICE, AND PROJECTION DISPLAY APPARATUS - A light source unit includes a cylindrical transparent substrate capable of being controlled to rotate; plural segment regions provided at a cylinder portion of a side surface of the cylindrical transparent substrate; layers of different phosphors arranged on at least two of the plural segment regions, the different phosphors being configured to emit light of prescribed wavelength bands upon receiving excitation light; and an excitation light source provided inside or outside of the transparent substrate, the excitation light source being configured to apply the excitation light to the phosphors.02-23-2012
20120002180PROJECTION DEVICE WITH BRIGHTNESS ADJUSTMENT FUNCTION AND METHOD THEREOF - A projection device with an illumination adjustment function is provided. The projection device includes a storage unit for storing a predetermined illumination range value; a lens module, a light source, a power supply unit, an optical sensor, a controller, a power controller, and an optical engine. The light source emits light onto a projection screen. The optical sensor receives the light reflected from the projection screen. The controller acquires an illumination value of the light, and compares whether the illumination value falls within the predetermined illumination range. The power controller adjusts a power from the power supply unit to the light source until the illumination value falls within the predetermined illumination range. The optical engine is controlled to operate the light when the illumination value of the light falls within the predetermined illumination range. The lens module focuses the light onto the projection screen.01-05-2012
20100002202Configuration of an Optical Illumination System for Minimizing the Influence of Arc Deflections - A method for reducing the effects of fluctuations in the light intensity of an effective light which is emitted by a discharge lamp, is focused by a reflector and is coupled into a light-collecting optical unit with a defined étendue at a defined acceptance angle. The method comprises the steps of: defining an effective luminous flux maximum depending on étendue, acceptance angle and/or reflector properties, and changing the reflector properties, the acceptance angle and/or the étendue in such a way that the effective luminous flux maximum is reduced by a definable percentage magnitude.01-07-2010
20120013856PROJECTION DISPLAY APPARATUS - A projection display apparatus may include alight source, a power supply unit, a detecting unit, a nonvolatile memory, a capacitor, and a control unit. The power supply unit supplies power from an external power supply to the light source power derived from the received power. The detecting unit detects a cut-off state in which no or no sufficient power is being received by the power supply unit. The capacitor accumulates charges in response to power being received. Following detection of the cut-off state and even after turning off the light source, the control unit is operable to carry out a data storage operation in which at least part of the data is stored in the nonvolatile memory, wherein power to carry out the data storage operation is obtained from the charges previously accumulated by the capacitor.01-19-2012
20120008107PROJECTION DISPLAY - The invention provides a projection display that achieves continuous light amount control with ease and without causing unevenness of illumination of light applied to a light valve responsive to a video signal, thereby allowing constant image display with satisfactory contrast. The projection display of the invention includes a light valve (01-12-2012
20120008106METHOD OF DRIVING DISCHARGE LAMP, DRIVING DEVICE, AND PROJECTOR - A method for driving a discharge lamp that supplies an AC current to a discharge lamp having a first electrode and a second electrode so as to produce discharge and to cause the discharge lamp to emit light includes, during a steady operation in which the AC current is supplied to the discharge lamp, changing a difference between the absolute values of average current values for two polarities during one cycle of the AC current in accordance with a predetermined pattern.01-12-2012
20120008105PROJECTOR AND METHOD FOR CONTROLLING THE SAME - There is provided a projector that uses a laser light source and is safe and realizes high brightness. The projector applies a laser beam emitted from a laser light source (01-12-2012
20120013857MOBILE ELECTRONIC DEVICE - It is an object to provide a mobile electronic device capable of reducing a possibility that a position to which an image is projected changes unintentionally. The mobile electronic device includes an image projector that projects an image, a housing that supports the image projector, a vibration generator that can vibrate the housing and adjust the intensity of the vibration, and a control unit that controls operations of the image projector and the vibration generator. The mobile electronic device is configured that the control unit suppresses the vibration according to projection by the image projector, and the task is thereby solved.01-19-2012
20120057138PROJECTION DISPLAY APPARATUS - A projection display apparatus according to a first feature includes: an imager that modulates light emitted from a light source; and a projection unit that projects the image light modulated by the imager onto a projection plane. The projection plane includes a projectable region where the image light can be projected. The projectable region includes a projection region on which the image light is projected based on an image signal and a non-projection region other than the projection region. The projection display apparatus further includes: an adjustment unit that adjusts the shape of the projection region within the projectable region; and a control unit that displays additional information at least in the non-projection region within the projectable region.03-08-2012
20120026472LIGHT SOURCE UNIT AND PROJECTOR - There is provided a light source unit comprising a luminescent plate having a luminescent light emission portion and a diffuse transmission portion, a first light source which emits light of a wavelength band which can excite the luminescent material, a second light source which emits light of a wavelength band which differs from the luminous light and the light emitted from the first light source, a light guiding optical system which guides light of respective wavelength bands in color emitted from the luminescent plate to a predetermined plane, and a light source control part for controlling individually the emission of light from the first light source and the second light source, wherein the luminescent plate is disposed on optical paths of the first light source and the second light source, wherein a light shining position of light from the first light source and a light shining position of light from the second light source are made to differ from each other on the luminescent plate, and wherein the light source control part controls so that the first light source and the second light source emit light simultaneously or separately to thereby emit synthesized light or monochromatic light.02-02-2012
20110025989HIGH-PRESSURE DISCHARGE LAMP LIGHTING DEVICE, HIGH-PRESSURE DISCHARGE LAMP DEVICE USING SAME, PROJECTOR USING SAID HIGH-PRESSURE DISCHARGE LAMP DEVICE, AND HIGH-PRESSURE DISCHARGE LAMP LIGHTING METHOD - Constant current control is performed after the completion of starting operation of a high-pressure mercury-vapor lamp 02-03-2011
20120105815PROJECTION DEVICE WITH BRIGHTNESS ADJUSTMENT FUNCTION AND METHOD THEREOF - A projection device with a brightness adjustment function includes a reflective display, a light source, a lens module, a power supply unit, a light detection unit and a power controller. The light source emits light to the reflective display. The lens module projects the images displayed by the reflective display. The reflective display is periodically rotated for reflecting the light to the lens module. The power supply unit supplies power for the light source. The light detection unit acquires a digital value of a portion of the light reflected by the reflective display that is not received by the lens module, and compares the digital value with a predetermined digital value to generate a control signal. The power controller adjusts power from the power supply unit to the light source according the control signal until the digital value matches the predetermined digital value of the light.05-03-2012
20110102751Projector - This projector includes a laser beam emitting portion emitting a laser beam and a projecting portion projecting an image on an arbitrary projection region by scanning the projection region with the laser beam. This projector further includes a control portion controlling the laser beam emitting portion not to emit the laser beam by stopping supplying current to the laser beam emitting portion in a previously set partial scanning section within a scanning section for the laser beam.05-05-2011
20100245781PROJECTION DISPLAY APPARATUS - A projection display apparatus includes a housing case housing a solid light source, a light valve configured to modulate light emitted from the solid light source, and a projection unit configured to project light emitted from the light valve on a projection plane. The projection display apparatus includes a cable terminal provided on at least one of sidewalls forming both ends of the housing case in a horizontal direction parallel to the projection plane.09-30-2010
20100245780PROJECTION DISPLAY APPARATUS - A detection unit detects an entering object that will enter at least a projection space. When an entering object has been detected by a first detection unit, a controller initiates safety processing, the safety processing being milder than safety processing that is initiated when an error has occurred in the projection display apparatus itself. For example, when an entering object has been detected, the controller controls components of the projection display apparatus so as to switch to the projection of a black image and so as to maintain the state of the projection display apparatus, excluding the switching.09-30-2010
20100208216PROJECTOR AND CONTROL METHOD - [Problem] There is provided a projector and the like capable of appropriately preventing image light from being projected without an intention in the state in which the image light of the projector can be projected in accordance with an operation of a remote controller.08-19-2010
20120133908Optical Projection Apparatus - An optical projection apparatus includes a first light source, a second light source, and an imaging element, which is illuminated by the first light source and the second light source during operation. The light source includes a light-emitting diode chip that emits red light during operation. The second light source includes a first light-emitting diode chip, which emits green light during operation. A second light-emitting diode chip emits blue light during operation. The second light-emitting diode chip is arranged on the first light-emitting diode chip at a radiation exit surface of the first light-emitting diode chip. Electromagnetic radiation generated in the first light-emitting diode chip during operation passes through the second light-emitting diode chip.05-31-2012
20090059184PROJECTOR - A projector includes a light source for emitting light, a color wheel for filtering the light emitted from the light source, a converging module for converging the filtered light, a light-modulating device for modulating the light emitted from the light source, a lens module for projecting the light modulated by the light-modulating device; and a contrast-adjusting device. The contrast-adjusting device is positioned in a light path associated with the light source. The contrast-adjusting device includes a liquid crystal panel and a driving element. The liquid crystal panel is inserted into the light path associated with light source inside the lens module, and is driven by the driving element to tilt relative to light incident thereon from the light source so that contrast of the light output from the liquid crystal panel changes.03-05-2009
20110188008PROJECTION DISPLAY APPARATUS - A projection display apparatus for projecting an image light onto a projection plane, includes: a detector configured to detect a state of the projection display apparatus with respect to the projection plane; and a controller configured to control a state of the image light according to the detected state.08-04-2011
20120075596HIGH EFFICIENCY ILLUMINATION - An electronic device comprises a processor, a light source, and a controller coupled to the light source. The controller comprises logic to cycle the light source between an active state and an inactivate state at with a pulse duration that measures between 30 milliseconds and 100 milliseconds and jitter a time onset of the active state by a quasi-random time that measures between 0 and 30 milliseconds for one or more cycles. Other embodiments may be described.03-29-2012
20120314192PROJECTOR AND METHOD FOR CONTROLLING SAME - In order to minimize a change in the luminance of a projected image caused by a lamp refreshing process, projector 12-13-2012
20120229780LIGHT SOURCE APPARATUS AND PROJECTOR - A light source apparatus is provided comprising: 09-13-2012
20100328630PROJECTOR AND CONTROL METHOD THEREOF - Disclosed herein is a projector that can be loaded with lamps of a plurality of kinds, each of a plurality of the lamps loadable into the projector being given a lamp serial code formed by arranging lamp information including at least a minimum wattage and a maximum wattage of the lamp and a check sum in predetermined order, the projector including: a lamp power supply for driving the lamp loaded in the projector, the lamp power supply being provided in advance with a plurality of mode ranges each as a range from a minimum wattage to a maximum wattage of output of the lamp power supply, and one predetermined mode range of the plurality of mode ranges being freely set in the lamp power supply; and a control circuit for controlling the lamp power supply.12-30-2010
20100328629PROJECTOR AND CONTROL METHOD THEREOF - Disclosed herein is a projector that can be loaded with lamps of a plurality of kinds, each of a plurality of the lamps loadable into the projector being given a lamp serial code formed by arranging lamp information including at least a minimum wattage and a maximum wattage of the lamp and a check sum in predetermined order, the projector including: a lamp power supply for driving the lamp loaded in the projector, the lamp power supply being provided in advance with a plurality of mode ranges each as a range from a minimum wattage to a maximum wattage of output of the lamp power supply, and one predetermined mode range of the plurality of mode ranges being freely set in the lamp power supply; and a control circuit for controlling the lamp power supply.12-30-2010
20100328628LIGHT SOURCE UNIT AND PROJECTOR - A light source unit comprising an optical wheel having a plurality of segment areas and including luminescent light emitting areas where at least two luminescent material layers having different characteristics are provided in a circumferential direction, a wheel motor for driving to rotate the optical wheel, an excitation light source for shining light on to the optical wheel, a light emitting light source and a collective optical system for collecting a light beam from the optical wheel and a light beam from the light emitting light source to the same optical path, wherein the excitation light source is selectively turned on to illuminate the at least two luminescent material layers having different characteristics which are disposed on the luminescent light emitting areas, and wherein the light emitting light source is turned on for a period of time during which the excitation light source does not shine the excitation light.12-30-2010
20100328627LIGHT SOURCE UNIT AND PROJECTOR - To provide a light source unit which can increase luminance and a projector including this light source unit. This light source unit includes a luminous wheel having a segment area on which a luminescent material layer is formed which emits light of a predetermined wavelength band by receiving light, and a segment area which is made into a transmission portion which transmits light, a primary light source which shines light of a visible wavelength band on to the luminous wheel, a secondary light source which emits light of a wavelength band which is different from light from the luminescent material layer and light from the primary light source, a collective optical system which collects light from the luminous wheel and the secondary light source to cause them to converge to the same optical path, and a light source control device which controls the emission of light from the light sources.12-30-2010
20100328626LIGHT SOURCE DEVICE, PROJECTION APPARATUS, AND PROJECTION METHOD - A light source device includes a first light source configured to emit light within a first wavelength band, a light-source light production section configured to sequentially produce light-source light of a plurality of colors at predetermined frequency by using light emitted by the first light source, a second light source configured to emit light within a second wavelength band different from the first wavelength band, and a light source control section configured to control drive timing for each of the first and second light sources such that a light emission period for light-source light using light emitted by the second light source is positioned between light emission periods for the light-source light of the plurality of colors produced by the light-source light production section and that the light-source light using light emitted by the second light source has a frequency higher than that of the light-source light production section.12-30-2010
20100328625LIGHT SOURCE UNIT UTILIZING LASER FOR LIGHT SOURCE AND PROJECTOR - A light source unit includes a light emitting plate which has a plurality of segment areas and in which a luminescent material layer which emits light having a predetermined wavelength band by receiving excitation light and a transmissive portion which transmits light are formed on at least the plurality of segment areas, a primary light source for emitting excitation light on to the luminescent material, a secondary light source for emitting light having a wavelength band which differs from those of luminescent light emitted from the luminescent material layer and excitation light emitted from the primary light source, a light guiding optical system for guiding light emitted from the light emitting plate and light emitted from the secondary light source to the same optical path, and a light source control means for controlling the emission of light from the primary light source and the secondary light source.12-30-2010
20100328624PROJECTOR - A projector including a lens, an IR emission circuit, an IR reception circuit and a central processing circuit is provided. The projector is controlled by a first infrared ray (IR) signal provided by a remote controller. The IR emission circuit emits a second IR signal to detect whether an obstacle is positioned on an optical path of the projection light. When an obstacle is positioned on the optical path, the second IR signal is reflected to the IR reception circuit via the obstacle. The IR reception circuit provides a first and a second output signal in response to the first and the second IR signal respectively. The central processing circuit determines that an obstacle is positioned on the optical path and accordingly alters an operational mode of the projector in response to the second output signal and controls the operation of the projector in response to the first output signal.12-30-2010
20110234999PROJECTOR INCLUDING LIGHT SOURCE CONTROLLING SECTION FOR TURNING LIGHT SOURCE ON AND OFF, CONTROL METHOD, CONTROL PROGRAM, AND RECORDING MEDIUM - A control unit of a projector includes a startup information receiving section configured to receive startup information about startup of the projector. A medium judging section of the control unit is configured to judge types of information available on a recording medium. A light source controlling section of the control unit is configured to execute light turn-on control of a light source to emit light after the startup information receiving section receives the startup information, and execute light turn-off control to turn off the light source after execution of the light turn-on control when the type of the information on the recording medium is determined to be exclusively non-visual by the medium judging unit.09-29-2011
20110234998LIGHT SOURCE UNIT AND PROJECTOR - To provide a projector which enables a stable projection for a long period of time, there is provided a projector comprising a light source unit, a display device, a projection-side optical system, a light guiding optical system and a projector control unit, wherein the light source unit comprises an excitation light source unit comprising an excitation light source and a microlens array and a rectangular green luminescent plate which receives light emitted from the excitation light source to emit light in a green wavelength band, and the microlens array is disposed between the excitation light source and the luminescent plate and has a plurality of micro convex lenses which each have a similar shape to the shape of the luminescent material layer are arranged into a matrix, so as to convert light from excitation light source into a plurality of pencils of light to shine them onto the luminescent plate.09-29-2011
20110234996DISCHARGE LAMP UNIT AND PROJECTION TYPE IMAGE DISPLAY APPARATUS USING THE SAME - Provided is a discharge lamp unit operable to detect a precursor of breakage of a lamp before the lamp is broken and to prevent breakage of the lamp. The discharge lamp unit includes: a discharge lamp; a lighting device for supplying a current to the discharge lamp; and a detection circuit for controlling, by controlling the lighting device, supply of current to the discharge lamp when the detection circuit detects expansion of the discharge lamp. The detection circuit detects a precursor of breakage before expansion of the discharge lamp causes breakage and terminates supply of current to the discharge lamp.09-29-2011
20100231870LASER PROJECTOR - A laser projector is provided. A laser light source is configured to emit laser light. A scanning section is configured to scan a projection surface in a horizontal direction and a vertical direction with the laser light emitted from the laser light source, thereby forming an image on the projection surface. A generating section is configured to generate a pulse signal. A driving section is configured to reciprocate the scanning section in the horizontal direction in accordance with the pulse signal generated by the generating section. An adjusting section is configured to adjust a pulse pattern of the pulse signal generated by the generating section so as to change a scanning angle range of the scanning section in the horizontal direction.09-16-2010
20120086923LIGHT SOURCE DEVICE, PROJECTOR, AND DRIVING METHOD OF DISCHARGE LAMP - To prevent biased consumption of electrodes in a discharge lamp and to prevent biased precipitation of the electrode material, a light source is provided. The light source device has a discharge lamp that emits light by discharge between a first electrode and a second electrode; and a driver that supplies alternating current to the first and the second electrodes so as to maintain the discharge, and changes duty ratio of the alternating current in accordance with predetermined pattern. The predetermined pattern includes a plurality of section periods for which the duty ratio maintains mutually different values for a predetermined period.04-12-2012
20120086922PROJECTION DISPLAY DEVICE - A projection display device includes: an aperture part which narrows light traveling toward an imager; a control part which controls the aperture part; a detection part which detects brightness of an image to be projected; and a determination part which determines whether the image is a still image or a moving image. In this arrangement, the control part operates the aperture part so as to narrow the light when the brightness of the image detected by the detection part is darker than predetermined brightness, and operates the aperture part so as to further narrow the light when the brightness of the image detected by the detection part becomes darker than the predetermined brightness. In addition, the control part sets the predetermined brightness for operating the aperture part so as to be darker when the image is the still image than when the image is the moving image.04-12-2012
20120086921Turning Off a Projector - A method of and apparatus for turning off a projector. The method and apparatus identify a condition to the effect that the projector should not be powered on, identify a condition to the effect that the power draw of the projector is above a threshold value, and instruct the projector to turn off.04-12-2012
20130016326LIGHTING METHOD AND LIGHTING APPARATUS FOR A HIGH PRESSURE DISCHARGE LAMP, A HIGH PRESSURE DISCHARGE LAMP APPARATUS, AND A PROJECTION-TYPE IMAGE DISPLAY APPARATUS - After discharge has begun in a high pressure discharge lamp, constant current control is performed so a lamp current becomes 4 [A]. Then, the current supplied to a pair of electrodes in the lamp is controlled so an electrode tip temperature t [degrees C.] at this time and an electrode tip temperature T [degrees C.] during stable lighting satisfy the relationship t [degrees C.]<=1.1 T [degrees C.]. When a power of the lamp reaches a rated power value, power control is changed to constant power control. This method enables suppressing an excessive rise in the temperature of the electrode tips in an initial lighting interval from lighting commencement until stable lighting, thereby preventing an increase in arc length due to melting of the electrode tips. Accordingly, illuminance does not readily decrease, particularly in a lamp unit including a high pressure discharge lamp mounted to a reflecting mirror.01-17-2013
20130016324WIDE FIELD-OF-VIEW PROJECTORAANM Travis; AdrianAACI SeattleAAST WAAACO USAAGP Travis; Adrian Seattle WA US - This document describes various techniques for implementing a wide field-of-view projector. A wide field-of-view projector may include a spatial light modulator configured to inject light rays into an input wedge. The input wedge acts to output the light rays with an increased fan-out angle. In an embodiment, the spatial light modulator is controlled to inject light rays into the input wedge effective to project an image from the surface of an output wedge that is positioned proximate, and receives light rays with an increased fan-out angle from, the input wedge.01-17-2013
20130016325PROJECTING APPARATUS AND PROJECTING EQUIPMENTAANM Yu; GangAACI ShenzhenAACO CNAAGP Yu; Gang Shenzhen CN - The present invention discloses a projecting apparatus. The apparatus includes light emitting diodes, a light guide plate and a projecting component. The light guide plate is mounted between the light emitting diodes and the projecting component. A switching control valve is mounted between the light guide plate and the projecting component. The switching control valve is switched between an on position and an off position between the light guide plate and the projecting component. In the on position, the switching control valve guides lights of the light guide plate to the projecting component as a light source of the projecting component; in the off position, the switching control valve cuts off the lights guided from the light guide plate to the projecting component to further cut off the light source of the light guide plate. The present invention further discloses a projecting equipment.01-17-2013
20130021587LIGHT SOURCE UNIT UTILIZING LASER FOR LIGHT SOURCE AND PROJECTOR - A light source unit includes a light emitting plate which has a plurality of segment areas and in which a luminescent material layer which emits light having a predetermined wavelength band by receiving excitation light and a transmissive portion which transmits light are formed on at least the plurality of segment areas, a primary light source for emitting excitation light on to the luminescent material, a secondary light source for emitting light having a wavelength band which differs from those of luminescent light emitted from the luminescent material layer and excitation light emitted from the primary light source, a light guiding optical system for guiding light emitted from the light emitting plate and light emitted from the secondary light source to the same optical path, and a light source control means for controlling the emission of light from the primary light source and the secondary light source.01-24-2013
20080239249LIGHT EMITTING DIODE (LED) ILLUMINATION CONTROL SYSTEM AND METHOD - An LED illumination system includes control circuitry and first, second and third colored LEDs. The control circuitry sequentially drives the first, second and third colored LEDs in a color cycle frame with relative duty cycles having a known relationship that achieves a color balance. The control circuitry also operates to introduce at least one spoke period in the color cycle frame, during which the first, second and third LEDs are driven in a manner that is controlled to provide brightness adjusting light that matches the color balance achieved by the relative duty cycles of the first, second and third LEDs during sequential driving thereof.10-02-2008
20080231816DISCHARGE LAMP LIGHTING DEVICE AND IMAGE PROJECTION DEVICE - To provide a discharge lamp lighting device which is made efficient at the time of starting to light a high-voltage discharge lamp and has quick illumination rising. To start a high-voltage discharge lamp 09-25-2008
20080225241Projector and Method for adjusting projective luminance thereof - A projector includes a housing, a projecting module, a first luminance sensor, a second luminance sensor and a control module. The projecting module includes a light source for emitting light, a light valve for modulating the light into image light, and a projection lens for projecting the image light to a screen. The first luminance sensor senses the luminance of the image projected on the screen. The second luminance sensor senses the ambient luminance. The control module adjusts luminance of the light emitted from the light source according to sensed results of the two luminance sensors.09-18-2008
20080218702LIGHT AMOUNT CONTROL DEVICE AND PROJECTOR - A light amount control device that controls an amount of light acquired from a light source provided in an image display apparatus includes: a pulse generator; an operation processing portion for light amount control that outputs a transfer start signal at timing when the amount of light is controlled; a data setting circuit that is provided outside the operation processing portion and that stores data, in which various kinds of signals instructing the operation processing portion to set transfer data beforehand are set, in a memory; an address generator that is provided outside the operation processing portion and that sets an address in response to the transfer start signal output from the operation processing portion; a memory that is a main component included in the pulse generator and that outputs data on the basis of a memory address generated by the address generator; a pulse driven body whose operation direction and speed are determined by a pulse signal formed by data output from the memory and which is driven by a pulse; an actuator connected to the pulse driven body; and an opening capable of adjusting the amount of transmitted light according to an operation of the actuator inserted in an emission path of the light source.09-11-2008
20080218701PROJECTOR AND CONTROL METHOD THEREOF - Disclosed herein is a projector that can be loaded with lamps of a plurality of kinds, each of a plurality of the lamps loadable into the projector being given a lamp serial code formed by arranging lamp information including at least a minimum wattage and a maximum wattage of the lamp and a check sum in predetermined order. The projector includes: a lamp power supply for driving the lamp loaded in the projector, the lamp power supply being provided in advance with a plurality of mode ranges each as a range from a minimum wattage to a maximum wattage of output of the lamp power supply, and one predetermined mode range of the plurality of mode ranges being freely set in the lamp power supply; and a control circuit for controlling the lamp power supply.09-11-2008
20130114051SYSTEM AND METHOD FOR CREATING ARTIFICIAL ATMOSPHERE - A lighting system (05-09-2013
20130128241PROJECTION DISPLAY APPARATUS AND CONTROL METHOD THEREFOR - A projection display apparatus includes: a display element that displays an image; a lamp that illuminates the display element to cause the display element to emit an image light; a variable light intensity element that allows the light emitted from the lamp to pass therethrough, the intensity of light passing through the variable light intensity element being variable; and a light intensity controller that determines whether the display element is at an image mute state in which a full-black image is displayed, or at a normal lighting state other than the image mute state, and when the display element is at the image mute state, reduces the amount of power supplied to the lamp to a level that is lower than that of the normal lighting state to decrease the intensity of light emitted from the lamp, and also decreases the intensity of light that passes through the variable light intensity element.05-23-2013
20130128240PROJECTOR AND METHOD OF CONTROLLING THE SAME - A projector, adapted to project image light while making the image light wide-angle with a reflecting section to thereby display an image, includes a detection section adapted to detect an obstacle, which blocks the image light reflected by the reflecting section, a message display section adapted to display a warning message within the image if the detection section detects the obstacle, and a display position change section adapted to change a display position of the warning message within the image in accordance with passage of time.05-23-2013
20080198337DISCHARGE LAMP CONTROL DEVICE AND PROJECTOR - A discharge lamp control device includes: a discharge lamp driver section which drives a lamp; and a discharge lamp drive control section which performs constant current control so that a discharge lamp current that flows between electrodes of the lamp becomes constant when a discharge lamp voltage applied between the electrodes of the lamp is lower than a first voltage, and performs constant power control so that an amount of power supplied to the lamp becomes constant when the discharge lamp voltage is equal to or higher than the first voltage after the lamp has been lighted. The discharge lamp drive control section includes a discharge lamp drive frequency control section which causes the drive frequency when the discharge lamp voltage is lower than a second voltage which is equal to or lower than the first voltage to be lower than the drive frequency when the discharge lamp voltage is higher than the second voltage.08-21-2008
20110234997LIGHTING DEVICE, LIGHTING CONTROL DEVICE, ILLUMINATION DEVICE, AND PROJECTOR - A lighting device which lights the discharge lamp, includes: a converting circuit which converts the direct current into an alternating current; a pulse generating circuit which generates a high voltage pulse; and a trigger circuit which causes the pulse generating circuit to generate the high voltage pulse, wherein the pulse generating circuit includes a primary winding and a secondary winding and generates the high voltage pulse by increasing a current input to the secondary winding based on a current input to the primary winding, and the trigger circuit includes a high pass filter; a first capacitor which stores and discharges charges input via the high pass filter; and a third switching element which outputs an output current from a second capacitor connected in parallel to the converting circuit to the primary winding if an output voltage from the first capacitor exceeds a threshold.09-29-2011
20090279054Projector and maintenance system for ballast thereof - A maintenance system for a ballast is applied to a projector. The projector includes a housing. The maintenance system for the ballast includes an input/output interface and a ballast. The input/output interface is disposed on the housing, and has a first transmitting terminal, a first receiving terminal and an input/output connection port. The first transmitting terminal and the first receiving terminal are electrically connected to the input/output connection port. The input/output connection port is uncovered by the housing. The ballast is disposed inside the housing, and has a second transmitting terminal and a second receiving terminal. The second transmitting terminal is electrically connected to the first receiving terminal of the input/output interface, and the second receiving terminal is electrically connected to the first transmitting terminal of the input/output interface.11-12-2009
20110292353OPTICAL DEVICE AND PROJECTION DEVICE - An optical device includes: a light synthesis prism that synthesizes incident light beams which are incident to a plurality of incidence surfaces and outputs the synthesized light beams; a light modulation unit that includes an optical compensation element and a reflective light modulation device; and a fixing member that fixes a reflective polarization element and the light modulation unit to the light synthesis prism so as to correspond to one of the incidence surfaces, wherein the light modulation unit includes a light blocking member that blocks light from reaching the light modulation unit and limits light with which the optical compensation element and the reflective light modulation device are irradiated, to light passing an aperture portion; and a heat insulating member that comes into contact with the light blocking member and the fixing member.12-01-2011
20130120718Image Display Device - Provided is a technique capable of effectively reducing local speckle noise caused by scanning with laser light involving a variation in scanning speed and improving the overall quality of an image.05-16-2013
20110310362ILLUMINATION DEVICE AND IMAGE DISPLAY APPARATUS - An illumination device includes: an excitation light source that emits excitation light having a first wavelength; a fluorescent substance that, when irradiated with the excitation light, emits light having a second wavelength longer than the first wavelength and transmits a part of the excitation light, and thereby multiplexes and emits the transmitted excitation light having the first wavelength and the emitted excitation light having the second wavelength; and a driving unit that moves an irradiation position of the excitation light in the fluorescent substance with the passage of time.12-22-2011
20110310361METHOD AND ELECTRONIC OPERATING DEVICE FOR OPERATING A GAS DISCHARGE LAMP AND PROJECTOR - A method for operating a gas discharge lamp may include; the gas discharge lamp is operated using an intermittently constant lamp current, whose time-relative average value of the frequency is predetermined by the lamp voltage of the gas discharge lamp in the steady state, wherein the lamp current has predefined commutation points in the temporal course, and a commutation for generating a commutation pattern can take place at these commutation points, wherein the time-relative average value of the frequency of the lamp current is adjusted by means of a variation of the commutation pattern.12-22-2011
20130114050IMAGE PROJECTION APPARATUS - An image projection apparatus includes a light source, light from which is used to form an image to be projected, a first flow path, a control unit configured to control a light emission from the light source, an electrical power stabilizing unit configured to stabilize an electrical power to be supplied to the light source, and an electrical power source unit configured to supply the electrical power to at least one of the control unit and the electrical power stabilizing unit. One or both of the electrical power source unit and the electrical power stabilizing unit is/are divided into a plurality of boards. The light source is arranged on a normal line of a surface of any of the plurality of boards. The plurality of boards configure surfaces of the first flow path except a surface nearest to the light source.05-09-2013
20130201458WAVELENGTH CONVERSION ELEMENT, LIGHT SOURCE DEVICE, AND PROJECTOR - A wavelength conversion element includes a phosphor layer that includes phosphors and a binder. The thickness of a phosphor region obtained by multiplying the thickness of the phosphor layer by the volume concentration of the phosphor is equal to or larger than 15 μm.08-08-2013

Patent applications in class LAMP CONTROL

Patent applications in all subclasses LAMP CONTROL