Patent application number | Description | Published |
20080218811 | KEYSTONE CORRECTING METHOD AND DISPLAY APPARATUS - Disclosed are a keystone correction method and a display apparatus using the same. The keystone correction method can include receiving a plurality of pixel data included in an image signal of a frame; computing a coordinate and data of a correction pixel from 3 row-directionally successive pixel data of the received pixel data; repeating the step of computing the coordinate and data of the correction pixel from all pixels of a row in the frame; and repeating the step of repeating the step of computing the coordinate and data of the correction pixel for all rows in the frame. With the present invention, the keystone can be corrected by using a minimum resource. | 09-11-2008 |
20080219594 | IMAGE RESOLUTION CONVERTING METHOD AND DISPLAY APPARATUS APPLIED WITH THE SAME - Disclosed are a method of converting an image resolution according to the machinery characteristics of a display apparatus and a display apparatus using the same. In accordance with an embodiment of the present invention, the image resolution converting method can include determining an image resolution of the input image; adjusting a vertical resolution of the image resolution of the input image to be identical to a vertical resolution of the output image; and adjusting a scanning time of a vertical line of the input image. With the present invention, it is possible to convert the resolution of the input image to a suitable resolution for the machinery characteristics of the display apparatus by using a few line memories instead of 1 frame memory before conversion and 1 frame memory after conversion. | 09-11-2008 |
20090073532 | SCANNER ACTUATING DEVICE - A scanner actuating device is disclosed. According to an embodiment of the present invention, the scanner actuating device can include a piezo actuator, which includes a plurality of piezo elements, which are contracted or expanded, and a friction contact part, which moves in an elliptic motion according to the contraction or expansion of the piezo element, a friction bar, which converts the elliptic movement into a straight-line movement and is protruded toward a different direction from the direction of the straight-line movement, a rotation member, which includes a sliding contact part moving with the straight-line movement of the sliding contact part, the sliding contact part, which rotates about a settled axis, and a scanning mirror, which is mounted on the rotation member and reflecting an incident beam of light in a desired direction by rotating about the rotation axis. | 03-19-2009 |
20090073545 | DISPLAY APPARATUS USING MONITORING LIGHT SOURCE - A display apparatus using monitoring light source is disclosed. a display apparatus includes a display light source of emitting a display beam, a monitoring light source of emitting a monitoring beam, an optical modulator of modulating the display beam and the monitoring beam to output a diffracted display beam and a diffracted monitoring beam, a scanner of scanning the diffracted display beam onto a display screen, an optical detector of receiving the diffracted monitoring beam and producing a detection signal corresponding to a quantity of light of the diffracted monitoring beam, and a controller of producing a control signal for controlling the optical signal according to an image signal, deciding a compensation value on receiving the detection signal, and producing a control signal to where that the compensation value is applied when modulating the display beam. Variation in displacement of each micro-mirror can be compensated by using a monitoring light source. | 03-19-2009 |
20090085829 | DISPLAY APPARATUS AND METHOD FOR COMPENSATING BEAM ALIGNMENT - A display apparatus compensating the discrepancy of alignment of beams irradiated on one-dimensional diffraction type optical modulator is disclosed. A 1-panel display apparatus including: a plurality of monochromatic light sources irradiating illumination light beams having different wavelengths; an optical modulator receiving sequentially the illumination light beams and modulating the illumination light beams according to a control signal; a scanner scanning the modulated illumination light beams sequentially on a display screen; and a control unit receiving an image signal and outputting a control signal for controlling the monochromatic light source, the optical modulator and the scanner in correspondence to the image signal, whereas the control unit controls an on/off timing of the monochromatic light source and an image data timing of the optical modulator in such a manner that a position of the modulated illumination light beam is equal to a position of a monochromatic image scanned on the display screen. | 04-02-2009 |
20090102830 | DISPLAY APPARATUS AND METHOD FOR COMPENSATING BEAM TILT - Disclosed is a display apparatus compensating the tilt discrepancy of a light beam irradiated on a one-dimensional diffraction type optical modulator. The display apparatus corresponds to a 1-panel display apparatus that includes: a plurality of monochromatic light sources irradiating illumination light beams having different wavelengths; an optical modulator sequentially receiving the illumination light beams and modulating the illumination light beams according to a control signal; a scanner sequentially scanning the modulated illumination light beams on a display screen; and a control unit receiving an image signal and outputting a control signal controlling the monochromatic light source, the optical modulator and the scanner in accordance with the image signal. The control unit controls a pixel drive signal of the optical modulator such that a tilt of a monochromatic scanned image, in which the modulated illumination light beams is scanned on the display screen, is compensated. | 04-23-2009 |
20090141339 | OPTICAL MODULATOR, OPTICAL MODULATOR MODULE AND SCANNING DISPLAY APPARATUS INCLUDING THE SAME - Disclosed are an optical modulator and an optical modulator module that can reduce a laser speckle. The optical modulator module can include an optical modulator, modulating an incident beam of light incident according to a driving signal and outputting the modulated beam of light; and a light transmissive substrate, placed in the optical modulator and formed with a phase control pattern, the incident beam of light and the outputted beam of light passing through the light transmissive substrate and the phase control pattern being formed in a part of a surface that is a light path of the incident beam of light and the outputted beam of light. Here, the phase control pattern, a central peak of an autocorrelation function can have a width that is smaller than a width of the phase control pattern, and a side lobe level is smaller than a level of the central peak. | 06-04-2009 |
20110085092 | OPTICAL MODULATORS INCLUDING INCORPORATED INTO MOBILE TERMINAL PROJECTOR - A mobile terminal includes an optical modulation projector. The mobile terminal also includes a control system, a projection control unit, and an optical modulation system. The control system outputs a projection control signal and image data. The projection control unit receives the image data from the control system, and generates and outputs a drive control signal depending on the image data received. The optical modulation system generates and modulates light and generates an image in response to the drive control signal and then scans the image for projecting onto a screen. | 04-14-2011 |