Patent application number | Description | Published |
20090128717 | IMAGE DISPLAY APPARATUS - A laser projector includes a green laser, a two-wavelength laser, a PBS, a collimator lens, a two-axis galvanometer mirror, a group of lenses, and a screen. The green laser emits a green laser beam. The two-wavelength laser emits red and blue laser beams. The PBS is provided at the position where respective optical paths of laser beams emitted from respective lasers cross each other to cause these optical paths to coincide with each other. | 05-21-2009 |
20090237622 | IMAGE 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 |
20090284506 | IMAGE DISPLAY DEVICE DISPLAYING IMAGE BY APPLYING LASER LIGHT - A scanning position of laser light applied to a projection plane is detected, and based on the detected scanning position, a synchronization signal is generated to designate a scan timing. A correction region detection portion detects whether or not a part corresponding to a prescribe region of an image on the projection plane is scanned by laser light, based on the generated synchronization signal. When the part corresponding to the prescribed region is scanned, a correction amount derivation portion corrects a gradation signal based on the difference between the detected quantity of laser light and a prescribed quantity of light to be output from the laser for displaying the image in the prescribed region. | 11-19-2009 |
20100002152 | IMAGE DISPLAY APPARATUS AND IMAGE DISPLAY METHOD - A detection surface of an optical detector is divided into regions C, E, F, G, and H. The optical detector outputs detection signals corresponding to the amounts of light incident on the respective regions. A position detection controller calculates an image projection position based on timing at which a laser beam is incident on region C. A laser control circuit adjusts the intensity of the laser beam emitted by a laser based on laser beam intensities detected in regions E to H arranged around region C. | 01-07-2010 |
20100006740 | DEVICE AND METHOD FOR DISPLAYING IMAGE - An image display device is provided, by which variations in drive sensitivity of a scan mirror is corrected. Processing executed by a CPU in a laser projector includes the steps of: driving a scanner mirror in a vertical direction; allowing at least one of a green laser and red/blue lasers to emit light; calculating stay time in a light-receiving region in a photoreceptor; comparing the calculated stay time with ideal stay time T | 01-14-2010 |
20100006741 | DEVICE AND METHOD FOR DISPLAYING IMAGE - A deviation of an optic axis of a laser projector is detected, and the deviation is corrected. Laser projector's CPU executes: commanding a laser beam source of one color, out of laser beam sources of three colors, to emit a laser beam; shutting off the laser when sensing that the laser beam is received in a light-receiving region; applying a laser of a color to be detected as to the presence or absence of a deviation of the axis until its reception in the light-receiving region is sensed; keeping time starting when light reception in the light-receiving region is sensed and ending when light reception in a light-receiving region adjacent thereto is sensed; calculating a relative time difference of each of the colors with respect to a reference color; and correcting a light emission timing of the laser beam source of each of the color, based on the calculated time. | 01-14-2010 |
20100231870 | LASER 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 |
20100253618 | DEVICE AND METHOD FOR DISPLAYING AN IMAGE - A projector producing an imaginary input plane with high operability is provided. A projector according to an embodiment projects a VUI screen picture onto a desk, and projects a main projection screen picture to a wall. The projector includes a light receiving element. The light receiving element is arranged in a position where light emitted toward the desk (VUI screen picture) and reflected (or scattered) by an object near the desk enters. The projector calculates a position of the object based on light sensing timing by the light receiving element and light scan positions at various points in time. The projector changes a projected screen picture when it determines that object is simultaneously in contact with a plurality of portions of the VUI screen picture and at least one of contact positions moves. | 10-07-2010 |
20100265278 | IMAGE DISPLAY APPARATUS AND METHOD FOR CONTROLLING IMAGE DISPLAY APPARATUS - An image display apparatus wherein reduction in contrast or resolution is prevented is provided. A laser projector as an embodiment of the image display apparatus includes a memory storing a threshold value predetermined for changing a driving mode of a laser light source, a calculator for calculating an optical power level for projecting an image, a driving-mode selector selecting a mode for driving the laser light source, a driving controller for sending a signal to the laser light source in accordance with a selected driving mode, and a laser emitter. The laser projector operates at least at a bias current value Ib or more. In this case, when the optical power level is lower than or equal to a predetermined threshold value TH, the laser projector emits pulsed light. When the optical power level based on a video signal exceeds threshold value TH, the laser projector changes the driving mode of laser light emission from pulsed light emission to DC light emission, to supply a current higher than or equal to bias current value Ib to each laser light source. | 10-21-2010 |
20110058109 | IMAGE DISPLAY APPARATUS, IMAGE DISPLAY METHOD, AND RECORDING MEDIUM HAVING IMAGE DISPLAY PROGRAM STORED THEREIN - A projector is provided which divides and projects a single image onto two different projection surfaces and appropriately performs virtual user interface through one projection surface. The projector projects a VUI screen image on a desk and projects a main projected screen image on a wall. The projector includes a light-receiving element. The light-receiving element is installed at a position that receives light emitted to the desk (the projection surface of the VUI screen image) and reflected (or scattered) by an object in the vicinity of the desk. The projector calculates a position of the object based on a light detection timing of the light-receiving element and a scanning position of light at each time. The projector changes a projected image based on the calculated position. The projector displays a designated region of the VUI screen image (for example, a region including the position of the object or an icon display region or a region surrounding an icon) to be brightened. | 03-10-2011 |
20130010211 | Display Device, and Portable Apparatus having Projector Function - Disclosed is a display device capable of inhibiting a projected picture from occurrence of brightness unevenness while reducing speckle noise. The display device ( | 01-10-2013 |
20130120714 | Image Display Device - To prevent effectively the flickering of an image due to the switching of a polarization direction while reducing speckle noise. A polarization switching unit is provided in an optical path of laser light to a projection surface A and periodically switches a polarization direction of the laser light emitted therefrom between p and S polarization. A laser control unit controls laser light sources in synchronization with the switching by the polarization switching unit and determines a driving current corresponding to a grayscale to be displayed on the basis of driving current characteristics for P polarization when the polarization direction of the laser light is the P polarization. In addition, the laser control unit determines the driving current corresponding to the grayscale to be displayed on the basis of the driving current characteristics for P polarization when the polarization direction of the laser light is the S polarization. | 05-16-2013 |
20140079080 | Image Display Apparatus and Electronic Apparatus Having Projector Function - This image display apparatus includes a plurality of laser beam source portions outputting laser beams of a plurality of color components different from each other, a synthesized beam generation portion synthesizing the laser beams of the plurality of color components, a control portion controlling the outputs of the laser beam source portions, and a driving current correction portion estimating a variation in the threshold current of each of the laser beam source portions and correcting a driving current on the basis of the estimated variation in the threshold current. | 03-20-2014 |
20140300583 | INPUT DEVICE AND INPUT METHOD - An input device includes a light source, a laser beam scanner, a photodetector, and an inclination determination component. The light source is configured to emit a laser beam. The laser beam scanner is configured to scan a plurality of lines of the laser beam in a line scanning direction. The lines of the laser beam are projected in a projection region of a projection surface. The photodetector is configured to detect a reflected light of the laser beam reflected by an object located above the projection region. The inclination determination component is configured to determine an inclination of the object with respect to the projection surface in the line scanning direction based on a change amount in a timing at which the photodetector detects the reflected light. | 10-09-2014 |
20140300584 | SPATIAL INPUT DEVICE - A spatial input device includes a light beam scanner, a photodetector, and a controller. The light beam scanner is configured to emit light beams toward a spatially projected image while two-dimensionally scanning the light beams. The photodetector is configured to detect the light beams that have been reflected by an input object within a detection range. The detection range extends inward of the spatial input device relative to the image. The controller is configured to count a scan line number indicative of a number of the light beams that have been detected by the photodetector, and to detect a depth position of the input object based on the scan line number. | 10-09-2014 |
20140300870 | IMAGE PROJECTION DEVICE AND INPUT OBJECT DETECTION METHOD - An image projection device includes a projection component, a photodetector, and a determination component. The projection component is configured to project an image by scanning light beams two-dimensionally. The photodetector is configured to detect reflected lights obtained in response to the light beams being reflected by a reflecting object. The determination component is configured to determine whether or not the reflecting object is an input object based on whether or not a difference of light detection positions of the light beams is at least a specific value. The light detection positions are indicative of irradiation positions of the light beams in a projection region of the image, respectively. | 10-09-2014 |
20140354598 | MANIPULATION INPUT DEVICE, MANIPULATION INPUT SYSTEM, AND MANIPULATION INPUT METHOD - A manipulation input device includes a projection component, a photodetector, and a position calculator. The projection component is configured to project an image on a projection surface by scanning light from a light source. The photodetector is configured to detect as scattered light the light reflected by a manipulation object that has moved into a specific detection range including the projection surface. The position calculator is configured to calculate a distance of the manipulation object from a reference point based on a continuous detection duration during which the photodetector continuously detects the scattered light, the position calculator being further configured to calculate coordinates of the manipulation object on the projection surface based on the distance of the manipulation object from the reference point and position information indicating a scanning position of the light on the projection surface when the photodetector has detected the scattered light. | 12-04-2014 |
20140354599 | MANIPULATION INPUT DEVICE, MANIPULATION INPUT SYSTEM, AND MANIPULATION INPUT METHOD - A manipulation input device includes a projection component, a photodetector and an inclination determination component. The projection component projects an image on a projection surface by scanning light from a light source. The photodetector detects as scattered light the light reflected by a manipulation object. The inclination determination component acquires, for a plurality of scan lines of the light, position information of the manipulation object that is specified based on scanning angle information when the photodetector has detected the scattered light, and width information of the manipulation object that corresponds to a continuous detection duration during which the photodetector continuously detects the scattered light. The inclination determination component determines inclination of the manipulation object based on at least one of a temporal change in a plurality of sets of the width information and a temporal change in a plurality of sets of the position information. | 12-04-2014 |
20140368754 | PROJECTOR - A projector includes a light source, a projection component, a photodetector, and an inclination calculator. The light source outputs light. The projection component projects an image on a projection surface by scanning the light outputted by the light source at an angle to the projection surface. The photodetector detects, as a reflected light, the light that has been scanned by the projection component and reflected by a detection object within a light detection range of the photodetector. The light detection range is set to a predetermined range in a direction perpendicular to the projection surface. The inclination calculator calculates an inclination angle of the detection object in a sub-scanning direction of the light based on a position of the detection object on the projection surface and a number of times the reflected light is detected while scanning in the sub-scanning direction. | 12-18-2014 |
20150077399 | SPATIAL COORDINATE IDENTIFICATION DEVICE - A spatial coordinate identification device includes a detection light source that emits a detection light that scans a detection boundary plane defined in space, an optical sensor that detects a reflected light of the detection light reflected by an indicator when the indicator enters a detection region extending from the detection boundary plane to the detection light source, and a controller. The controller stores virtual touch surface defining information that defines a position of a virtual touch surface based on the detection boundary plane, and identifies, in response to the detection of the reflected light, a position of a boundary point that is an intersecting point of the indicator and the detection boundary plane, and an approach amount by which the indicator has entered the detection region. | 03-19-2015 |