Patent application number | Description | Published |
20080239928 | OPTICAL PICKUP - An objective lens corresponding to a BD beam light, and an objective lens corresponding to a DVD/CD beam light are arranged parallel to an optical disc. One rising mirror is arranged in a tilted manner on a side opposite to the optical disc of the objective lenses. A first film for reflecting the BD beam light emitted from a laser diode and making the beam light enter the objective lens and transmitting the DVD/CD beam light emitted from a laser diode is arranged on one of the parallel surfaces of a transparent substrate of the rising mirror. A second film for reflecting the DVD/CD beam light transmitted through the first film and the transparent substrate and making the beam light enter the objective lens is arranged on the other surface. An incident optical axis to each objective lens of the BD beam light and the DVD/CD beam light is branched with the rising mirror. | 10-02-2008 |
20090015952 | Variable-shape mirror and optical pickup device therewith - In a variable-shape mirror provided with a support base, a mirror portion that is disposed to face the support base and that has, on a side thereof facing away from the support base, a mirror surface which is irradiated with a light beam, and piezoelectric elements that are sandwiched between the support base and the mirror portion and that vary the shape of the mirror surface, the piezoelectric elements are bonded, by means of a thin layer of metal, to at least one of the support base and the mirror portion by the application of heat and pressure. | 01-15-2009 |
20090122271 | IMAGE DISPLAY APPARATUS - An image display apparatus is provided that allows a user to check image content even in a place where there is no projection screen. A projector that is one mode of the image display apparatus includes a casing, a projection aperture provided in the casing, and an internal projection mirror and a built-in screen that are provided in a casing. When the projector is being folded, laser light emitted from the projection aperture is reflected by the internal projection mirror. The reflected light is projected onto the built-in screen, whereby an image is displayed. | 05-14-2009 |
20090122275 | IMAGE 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 |
20090128716 | PROJECTOR AND METHOD FOR PROJECTING IMAGE - A projector includes: a laser beam generator configured to emit a laser beam according to an image signal; a beam splitter configured to split the laser beam into a first laser beam toward the first projection plane and a second laser beam toward the second projection plane; a scanning unit, disposed between the laser beam generator and the beam splitter, configured to scan the laser beam from the laser beam generator toward the beam splitter; a light receiver configured to receive reflected light of the first laser beam; a computation portion configured to compute positional information indicating a position of an obstacle located in an optical path of the first laser beam based on a light receiving result by the light receiver; and a display control portion configured to change the image signal so that a pointer is displayed in the image based on the positional information. | 05-21-2009 |
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 |
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 |
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 |
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 |
20130120718 | Image 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 |
20130127716 | Projector - A projector capable of detecting the coordinates of a detection object at a height position away from a projection area to some extent is provided. This projector ( | 05-23-2013 |
20130127717 | Projector - A projector capable of detecting the position of a detection object while suppressing complication of the structure is provided. This projector is so configured that the optical axes of a laser beam of visible light emitted from a first laser beam generation portion and a laser beam of invisible light emitted from a second laser beam generation portion substantially coincide with each other. | 05-23-2013 |
20130155336 | Projector - Provided is a projector capable of suppressing deterioration of a portion of a projection portion irradiated with a laser beam while improving brightness. This projector is formed to deviate optical axes of laser beams emitted from a plurality of laser beam generation portions respectively from each other so that the laser beams emitted from the plurality of laser beam generation portions respectively do not concentrate on one point of a projection portion. | 06-20-2013 |
20130222771 | Projector - This projector is configured to allocate a first projection laser beam corresponding to a first image signal and a second projection laser beam corresponding to a second image signal different from the first image signal to a first area and a second area not overlapping with the first area, respectively, to project the first projection laser beam and the second projection laser beam. | 08-29-2013 |
20140133018 | Projector and Projection Screen - This projector includes a laser light generation portion, a projection portion scanning laser light, and a projection screen. The projection screen includes a lens member including a plurality of lens portions splitting the laser light and a diffusion member arranged to be opposed to the lens member, having an incident surface and a diffusion portion. The diffusion portion of the diffusion member is arranged at a position apart by a distance larger than the focal length of the lens member along an optical axis with respect to the optical principal surface of the lens member. | 05-15-2014 |
20140176815 | Video Projection Device and Video Display Device - A video projection device has a video output unit for outputting video by emitting light, and a reflective mirror for reflecting the light emitted from the video output unit to project the video on a projection target. The reflective mirror is driven to rotate about two axes so as to move the reflected light in the horizontal and vertical directions. | 06-26-2014 |
20140293236 | PROJECTOR AND HEAD-UP DISPLAY DEVICE AND A PROJECTOR CONTROL METHOD - A projector includes a light generator that emits a first light and a second light of mutually differing color components, a light position detector disposed to receive light incident in a direction outside of the projection surface and that detects a position of the incident light, a light scanner that projects the image onto the projection surface by scanning the first light and the second light with a first scanning angle, and that directs the first light and the second light to the light position detector by scanning the first light and the second light with a second scanning angle that is larger than the first scanning angle, and an adjustor that adjusts an emission timing of the first light and an emission timing of the second light so as to suppress relative misalignment between the first light and the second light on the projection surface. | 10-02-2014 |