Abstract: Linear chromaticity conversion is used to perform color reproduction of a liquid crystal display (LCD) compatible with a cathode ray tube (CRT). An inputted signal is subjected to processing similar to processing used in the CRT display. A light source chromaticity conversion processing portion carries out a ? correction to the signal in a ? operation portion by using ?1=?crt of the same nonlinear characteristics as the CRT, and performs an operation of a chromaticity conversion matrix in a matrix operation portion. An LCD inverse ? correction portion uses ?2 establishing ?_lcd=?lcd/?2=1 to perform an inverse ? correction to the inputted signal. An LCD ? characteristic operation portion performs a ? correction using ? characteristics of the LCD to the signal inputted from the LCD inverse ? correction portion, outputs a picture signal, and causes an image to be displayed on the LCD.

Abstract: Provided is a projection type liquid crystal display apparatus, which can improve black-level display and thus can display a higher-contrast image as compared to the related art. An optical compensator is located on the light exit side with respect to the liquid crystal display device so as to compensate for the optical phase difference caused by liquid crystal molecules in a light-entry-side region of the liquid crystal layer. As the optical compensator is located on the light exit side with respect to the liquid crystal display device, birefringence, caused by the liquid crystal molecules present in the light-entry-side region, is compensated for without being influenced by a microlenses provided in the liquid crystal plane. Consequently, the apparatus can improve the black-level display and thus can display a higher-contrast image as compared to the related art.

Abstract: A liquid crystal projector apparatus is presented, which can display an image free from an influence of a temperature variation of a liquid crystal panel without the necessity to directly measure the temperature of the liquid crystal panel. The liquid crystal projector apparatus includes a temperature sensor for detecting a temperature at a location in the liquid crystal projector apparatus except liquid crystal panels, a memory for storing temperature detection data obtained by the temperature sensor within a period from a power supply starting time to a steady operation entering time, an arithmetic operation device for estimating a temperature of each of the liquid crystal panels based on the temperature detection data stored in the memory, and liquid crystal drive sections for correcting drive voltages for driving the liquid crystal panels with output signals of the arithmetic operation device.

Abstract: Provided is a projection type liquid crystal display apparatus, which can improve black-level display and thus can display a higher-contrast image as compared to the related art. An optical compensator is located on the light exit side with respect to the liquid crystal display device so as to compensate for the optical phase difference caused by liquid crystal molecules in a light-entry-side region of the liquid crystal layer. As the optical compensator is located on the light exit side with respect to the liquid crystal display device, birefringence, caused by the liquid crystal molecules present in the light-entry-side region, is compensated for without being influenced by a microlenses provided in the liquid crystal plane. Consequently, the apparatus can improve the black-level display and thus can display a higher-contrast image as compared to the related art.

Abstract: Provided is a projection type liquid crystal display apparatus, which can improve black-level display and thus can display a higher-contrast image as compared to the related art. An optical compensator is located on the light exit side with respect to the liquid crystal display device so as to compensate for the optical phase difference caused by liquid crystal molecules in a light-entry-side region of the liquid crystal layer. As the optical compensator is located on the light exit side with respect to the liquid crystal display device, birefringence, caused by the liquid crystal molecules present in the light-entry-side region, is compensated for without being influenced by a microlenses provided in the liquid crystal plane. Consequently, the apparatus can improve the black-level display and thus can display a higher-contrast image as compared to the related art.

Abstract: Image data of the respective colors are converted, by look-up tables in which &ggr; correction data are stored, into gradation data that are white-balanced with intervention of the V-T characteristics of liquid crystal panels. The generated gradation data are supplied to D/A converters and the liquid crystal panels via liquid crystal driving circuits. Gamma correction data within dynamic ranges that are set for each display apparatus by measuring a luminance ratio and contrast ratios of the respective colors are written to the look-up tables in advance. As a result, all they correction data stored in the look-up tables can be used effectively. The invention is directed to such a method for generating data of look-up tables and an image display apparatus that performs gradation correction by using thus-formed look-up tables.

Abstract: Provided is a projection type liquid crystal display apparatus, which can improve black-level display and thus can display a higher-contrast image as compared to the related art. An optical compensator is located on the light exit side with respect to the liquid crystal display device so as to compensate for the optical phase difference caused by liquid crystal molecules in a light-entry-side region of the liquid crystal layer. As the optical compensator is located on the light exit side with respect to the liquid crystal display device, birefringence, caused by the liquid crystal molecules present in the light-entry-side region, is compensated for without being influenced by a microlenses provided in the liquid crystal plane. Consequently, the apparatus can improve the black-level display and thus can display a higher-contrast image as compared to the related art.

Abstract: Provided is a projection type liquid crystal display apparatus, which can improve black-level display and thus can display a higher-contrast image as compared to the related art. An optical compensator is located on the light exit side with respect to the liquid crystal display device so as to compensate for the optical phase difference caused by liquid crystal molecules in a light-entry-side region of the liquid crystal layer. As the optical compensator is located on the light exit side with respect to the liquid crystal display device, birefringence, caused by the liquid crystal molecules present in the light-entry-side region, is compensated for without being influenced by a microlenses provided in the liquid crystal plane. Consequently, the apparatus can improve the black-level display and thus can display a higher-contrast image as compared to the related art.

Abstract: In active driving of liquid crystal panels (R, G, and B) corresponding to R, G, and B color by X shift registers (R, G, and B) and Y shift registers (R, G, and B), alternating-current driving is performed such that signals to be written to the R color and B color liquid crystal panels are opposite in polarity to a signal to be written to the G color liquid crystal panel and also Vcom voltage of each of the liquid crystal panels is adjusted to thereby reduce flicker. The Vcom voltage supplied to the B color liquid crystal panel, for example, is finely adjusted to reduce flicker of a synthetic image of the liquid crystal panels.

Abstract: A liquid crystal projector providing an image having a high luminance and excellent contrast, including a polarization plate which is arranged at an incident side of a liquid crystal panel and transmits a first polarized beam therethrough, a polarization plate which is arranged at an exit side of the liquid crystal panel and transmits an optically modulated second polarized beam therethrough and outputs the same to a projection lens, and a phase difference film having one of a phase delay axis or a phase forward axis which is orthogonal to the polarization axis of the polarization plate and arranged inclined at a predetermined angle about an axis of rotation comprising an axis parallel to the polarization axis of the polarization plate in the plane in which said phase delay axis or phase forward axis is formed.

Abstract: The present invention provides a liquid crystal projector apparatus and a driving method for a liquid crystal projector apparatus, which can display an image with an optimum picture quality free from an influence of a temperature variation of a liquid crystal panel without the necessity to directly measure the temperature of the liquid crystal panel.

Abstract: The present invention uses linear chromaticity conversion to carry out color reproduction of an LCD compatible with a CRT. According to the invention, an inputted signal is subjected to a similar processing to a conventional case in a signal processing portion which is used in a conventional CRT display. A light source chromaticity conversion processing portion carries out a &ggr; correction to the signal inputted from the signal processing portion in a &ggr; operation portion by using &ggr;1=&ggr;crt of the same nonlinear characteristics as the CRT, and further carries out an operation of a chromaticity conversion matrix in a matrix operation portion. An LCD inverse &ggr; correction portion uses &ggr;2 establishing &ggr;_lcd=&ggr;lcd/&ggr;2=1 to carry out an inverse &ggr; correction to the inputted signal.

Abstract: Provided is a projection type liquid crystal display apparatus, which can improve black-level display and thus can display a higher-contrast image as compared to the related art. An optical compensator is located on the light exit side with respect to the liquid crystal display device so as to compensate for the optical phase difference caused by liquid crystal molecules in a light-entry-side region of the liquid crystal layer. As the optical compensator is located on the light exit side with respect to the liquid crystal display device, birefringence, caused by the liquid crystal molecules present in the light-entry-side region, is compensated for without being influenced by a microlenses provided in the liquid crystal plane. Consequently, the apparatus can improve the black-level display and thus can display a higher-contrast image as compared to the related art.

Abstract: In active driving of liquid crystal panels (R, G, and B) corresponding to R, G, and B color by X shift registers (R, G, and B) and Y shift registers (R, G, and B), alternating-current driving is performed such that signals to be written to the R color and B color liquid crystal panels are opposite in polarity to a signal to be written to the G color liquid crystal panel and also Vcom voltage of each of the liquid crystal panels is adjusted to thereby reduce flicker. The Vcom voltage supplied to the B color liquid crystal panel, for example, is finely adjusted to reduce flicker of a synthetic image of the liquid crystal panels.

Abstract: A display device has a line scan driving circuit disposed in a horizontal direction of a display region and a pixel driving circuit (dot scan driving circuit) disposed in a vertical direction of the display for performing image display with pixel groups each forming one line in the vertical direction being scanned in the horizontal direction. Vertical-horizontal converting circuitry is provided for converting an image data stream supplied with n pixels in a horizontal direction and m horizontal lines in a vertical scanning direction into an image data stream with m pixels in a vertical direction and n vertical lines in a horizontal scanning direction, and the vertical-horizontal converted data is supplied to the display device by a display controlling circuit.

Abstract: To effectively make a mesh of out lines between pixels by a pixel diffusion and at the same time to facilitate a focusing of an image by the observer, an optical filter for diffusing each pixel of a display device into a plurality of parts by utilizing diffraction or refraction is interposed between the display device having an image pattern in a mosaic form and an observer. The optical filter surface performs the pixel diffusion so that a sight angle, of a gap which does not pass light between the neighboring pixel after the pixel diffusion, as viewed from the observer on the focal plane on which the image displayed by the display device is observed by the predetermined observer is substantially a recognizable limit view angle of the observer.

Abstract: Image data of the respective colors are converted, by look-up tables in which &ggr; correction data are stored, into gradation data that are white-balanced with intervention of the V-T characteristics of liquid crystal panels. The generated gradation data are supplied to D/A converters and the liquid crystal panels via liquid crystal driving circuits. Gamma correction data within dynamic ranges that are set for each display apparatus by measuring a luminance ratio and contrast ratios of the respective colors are written to the look-up tables in advance. As a result, all they correction data stored in the look-up tables can be used effectively. The invention is directed to such a method for generating data of look-up tables and an image display apparatus that performs gradation correction by using thus-formed look-up tables.

Abstract: A display device has displaying means for by having a line scan driving circuit disposed in a horizontal direction of a display region and a pixel driving circuit (dot scan driving circuit) disposed in a vertical direction of the display region performing image display with pixel groups each forming one line in the vertical direction being scanned in the horizontal direction. Vertical-horizontal converting means is provided for converting an image data stream supplied presupposing n pixels in a horizontal direction and m horizontal lines in a vertical scanning direction into an image data stream for m pixels in a vertical direction and n vertical lines in a horizontal scanning direction, and the vertical-horizontal converted data is supplied to the displaying means by display controlling circuit means.

Abstract: An image display apparatus and a liquid-crystal display device using such an optical filter for diffusing pixels while suppressing the occurrence of moire. A diffuser (optical filter) 13 comprising a combination of a diffraction grating 26 and a birefringence plate 27 is disposed on an LCD 11 in an opposing relation to the viewer side. The diffraction grating 26 diffuses each pixel of the LCD 11 into three points in the vertical direction by a shift amount of POy/3 (POy: same color pixel pitch in the vertical direction). Further, the birefringence plate 27 diffuses each diffused pixel into two points in the horizontal direction by a shift amount of Pox/2 (Pox: same color pixel pitch in the horizontal direction). Thus, the diffuser 13 diffuses each pixel of the LCD 11 into six pixels to thereby optically erase a matrix-like pixel pattern.

Abstract: An imaging system includes left and right display panels arranged so as to be viewed separately by left and right eyes of a viewer. A three dimensional video signal is supplied to a drive circuit for the display panels such that image data from the three dimensional video signal is supplied alternately to the left and right display panels. The display panels are of a memory effect LCD type such that, when no image data is received by the display panel, the image data of the previously received field is maintained on display for providing flickerless imaging.