Patent application number | Description | Published |
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 |
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 |
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 |
20130070213 | Projector and Projector System - This projector includes a laser beam generation portion outputting a laser beam, an image projection portion, including a scanning portion scanning the laser beam, projecting an image on a projection area, an image correction portion correcting distortion of the projected image on the basis of projection condition information, a photoreceiving portion receiving the laser beam reflected by a detection object, and a position acquisition portion acquiring the position of the detection object on the basis of photoreceiving information of the laser beam received by the photoreceiving portion and the projection condition information employed by the image correction portion for correcting the image. | 03-21-2013 |
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 |
20130162960 | Image 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 |
20130222774 | Image Display Device - The image display device resolves inconsistency in the brightness of the image while effectively reducing local speckle noise that remains due to the laser scanning of which the scanning speed fluctuates. A waveform pattern (PT | 08-29-2013 |
20140078121 | Image Display Apparatus and Image Scanning Apparatus - This image display apparatus includes a light source emitting a laser beam, a scan mirror projecting an image by vertically and horizontally scanning the laser beam by swinging, and a scan control portion rendering the horizontal scanning amplitude of the scan mirror on the side of a projection image having a reduced length relatively large as compared with the horizontal scanning amplitude of the scan mirror on the side of the projection image having an increased length with respect to distortion in which the length of the upper side of the projection image and the length of the lower side of the projection image are different from each other. | 03-20-2014 |
20140160141 | IMAGE DISPLAYING DEVICE - An image displaying device includes laser beam sources that emit laser beams of mutually differing color components. The image display device projects an image based on a test pattern that includes a reference mark indicating horizontal and vertical reference positions by a mixed color of color components of the mutually differing color components, and bar marks arranged at specific intervals in the horizontal and vertical directions relative to the reference mark, for each color component, is used. Arrangement of the bar marks in the image data is an arrangement in which a distance from the reference mark is used as a reference, and for pairs of bar marks for bar marks of mutually differing color components, an amount of offset between bar marks in each of the bar mark pairs increases with fixed increments proportional to the distance from the reference mark. | 06-12-2014 |
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 |
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 |