Abstract: A color display apparatus includes a display panel which has a light reflection area and a light transmission area for each pixel, and a light source for causing light to enter the display panel from a back surface. The light reflection area includes a first subarea in which the incident light is modulated and reflected in a brightness change range within which a brightness of a reflected light is variable and a hue change range within which a hue of a chromatic color assumed by a reflected light is variable and a second subarea provided with a color filter in which incident light is modulated and reflected in a brightness change range within which a brightness of a reflected light is variable. In the light transmission area, the incident light is modulated in a brightness change range within which a brightness of a transmitted light is variable. The light source is periodically switched at least between two lights different in color.

Abstract: An active matrix display apparatus includes an active matrix display panel comprising a plurality of pixels arranged in a matrix in a row direction and a column direction, each pixel being constituted by a plurality of subpixels; and a drive circuit for applying a voltage to each of the subpixels so that a polarity of the voltage is inverted at a predetermined period in each of a row direction and a column direction. The plurality of subpixels are arranged in the row direction at a period different from half of the predetermined period of polarity inversion of the voltage in the row direction, thus providing flicker-less color display device even when general driver ICs for dot inversion drive are used.

Abstract: A color display apparatus is consituted by a display panel which has light reflection area and a light transmission area for each pixel , and a light source for causing light to enter said display panel from a back surface of said display panel. The light reflection area includes plurality of subareas including a first subarea in which the incident light is modulated and reflected in a brightness change range within which a brightness of a reflected light is variable and a hue change range within which a hue of a chromatic color assumed by a reflected light is variable and a second subarea provided with a color filter in which incident light is modulated and reflected in a brightness change range within which a brightness of a reflected light is variable. In the light transmission area, the incident light is modulated in a brightness change range within which a brightness of a transmitted light is variable. The light source is periodically switched at least between two lights different in color.

Abstract: A liquid crystal display apparatus includes at least one polarization plate, a phase difference plate, a pair of oppositely disposed substrates at least one of which is a transparent substrate, a liquid crystal disposed between said pair of substrates, and means for applying a voltage to said liquid crystal so that a retardation of said liquid crystal is modulated depending on the voltage applied to said liquid crystal. The liquid crystal is placed in a first alignment state which is determined by said pair of substrates when the voltage is not applied thereto. The phase difference plate has a retardation so that light passing through said liquid crystal, said phase difference plate, and said polarization plate assumes chromatic color when the voltage is not applied to said liquid crystal.

Abstract: A reflection type display apparatus includes a pair of substrates disposed opposite to each other. On the one of the substrates, a scattering plate (11) having a property of scattering an incident light toward its propagation direction is disposed, and on the other substrate a reflector (13) and a plurality of pixels (41, 42, 43) are formed. Furthermore, a light absorption or reflection structure (48) having a projection-like or a wall-like shape is disposed on said other substrate at least a portion of a periphery of unit each of said plurality of pixels. The reflection type display apparatus having such a structure provides a bright image without impairing clarity of the image.

Abstract: A hybrid color liquid crystal display device includes a liquid crystal layer in which liquid crystal molecules are aligned homeotropically with respect to a pair of substrates under no voltage application and includes a phase plate having an optical axis in a direction perpendicular to a substrate surface. The phase plate has a refractive index which is larger in an in-plane direction of substrate than in a direction normal to the substrate surface, and has a retardation smaller than a retardation of the liquid crystal layer in terms of an absolute value, thereby to suppress a change in color depending on a viewing angle.

Abstract: A projection type display device includes a light source, a picture information display element, and a light deflection device with a function to deflect light from the light source and irradiate the deflected light on a region of the picture information display element. The light deflection device scans the region on the picture information display element to be irradiated with light over the entire picture information display element within each frame period to thereby project a picture. A picture is displayed by changing the region on the picture information display element irradiated by light within a period of each one frame. The projection type display device provides sharp moving pictures and bright images. Furthermore, the projection type display device provides a wide dynamic range and faithful tone reproducibility for pictures that are mainly dark images. Moreover, the projection type display device can use a Half-V type FLC element for creating bright and sharp moving pictures.

Abstract: A liquid crystal display device capable of ensuring a good contrast ratio and preventing a lowering in color reproducibility at the time of motion picture image display includes a liquid crystal layer 56, showing optically uniaxial alignment, disposed between a first substrate B provided with at least a transparent electrode 54 and a second substrate A provided with an electrode 58 having a reflection function; a phase plate 52 disposed on the first substrate B; and a polarizer 51 disposed on the phase plate 52. The polarizer 51 and the phase plate 52 are disposed so that an optical axis of the polarizer 51 and a slow axis of the phase plate 52 form an angle ?, and the polarizer 51 and the liquid crystal layer 56 are disposed so that the optical axis of the polarizer 51 and an optical axis of the liquid crystal layer 56 form an angle of 2?+45 degrees. A retardation of liquid crystal is changed in a range between ?/4 and ?/2 to prevent light passing during black display.

Abstract: A color display element using a medium having optical properties modulated by an external modulation means is characterized in that the medium has a brightness modulation range where a brightness is changed by the modulation means and a color modulation range where a color is changed by the modulation means, the color display element has a unit pixel comprised of a plurality of sub-pixels including a first sub-pixel and a second sub-pixel having a color filter, and the modulation means gives modulation of the color modulation range to the first sub-pixel to display colors within the color modulation range, and gives modulation of the brightness modulation range to the second sub-pixel to display brightness of the color of the color filter within the brightness modulation range, whereby provides a color display.

Abstract: A display apparatus includes a display portion and a control portion, and effects color display depending on image signals for three colors. The control portion includes means 10, into which the image signals for three colors are inputted, for generating a first display signal for determining a brightness of predetermined one color at the display portion and second display signals for determining a hue of other two colors or an intermediary color therebetween at the display portion.

Abstract: A display apparatus includes a display panel comprising a plurality of pixels exhibiting a brightness change range with respect to an applied voltage and a hue change range with respect to the applied voltage, and a control portion where a color image signal is inputted therein and a display signal is outputted to the display panel. The display apparatus is characterized in that the control portion includes signal generation means for generating and outputting a brightness display signal in the brightness change range, a hue display signal in the hue change range, and a signal for indicating a mixing ratio between the brightness display signal and the hue display signal, from the inputted color image signal, and the display panel effects display, on the basis of the signal for indicating the mixing ratio, at a plurality of pixels in which pixels displaying in the brightness change range and pixels displaying in the hue change range are mixed.

Abstract: Unit pixels in a color display device each include a first and a second subpixel. The second is provided with a color filter, and each has a medium changing optical properties (hue and brightness of transmitted light) depending on an applied voltage. A voltage is applied to the first subpixel to modulate those optical properties of the medium and a voltage is applied to the second subpixel to modulate the brightness of light passing through the medium disposed at the second subpixel. When display of the color display device is switched, a correction voltage of the second subpixel is calculated from a voltage applied to the first subpixel before the display is switched and a voltage applied to the first subpixel after the display is switched, and the voltage applied to the second subpixel is set to a value obtained by superposing the correction voltage on a voltage determined by the display at the second subpixel in a predetermined period after the voltage applied to the first subpixel is switched.

Abstract: A color liquid crystal display device includes a pair of oppositely disposed substrates each of which is provided with an electrode and has been subjected to homeotropic alignment treatment, and chiral nematic liquid crystal disposed between the pair of oppositely disposed substrates. The chiral nematic liquid crystal is capable of causing birefringence leading to a change in brightness and a change in hue depending on a voltage applied between the electrodes. The liquid crystal is twistedly aligned under electric field application to change a twisted angle, so that a fluctuation in birefringence with temperature is compensated.

Abstract: One unit pixel is constituted by a subpixel a provided with a red color filter and a subpixel b at which green and blue are displayable in an electrically controlled birefringence (ZCB) mode. The subpixel b is provided with a cyan color filter to increase color purity. As a result, with respect to red, it is possible to effect continuous halftone display. With respect to green and blue, it becomes possible to effect stepwise or continuous halftone display in an areal gradation mode. By the use of the cyan color filter, it is possible to effect green display at a low voltage.

Abstract: A projection type display device includes a light source, a picture information display element, and a light deflection device that deflects light from the light source and irradiates the deflected light on one region of the picture information display element. The light deflection device scans the deflected light over an entire area of the picture information display element and an area outside of an effective display area of the picture information display element.

Abstract: A projection type display device includes a light source, a picture information display element, and a light deflection device with a function to deflect light from the light source and irradiate the deflected light on a region of the picture information display element. The light deflection device scans the region on the picture information display element to be irradiated with light over the entire picture information display element within each frame period to thereby project a picture. A picture is displayed by changing the region on the picture information display element irradiated by light within a period of each one frame. The projection type display device provides sharp moving pictures and bright images. Furthermore, the projection type display device provides a wide dynamic range and faithful tone reproducibility for pictures that are mainly dark images. Moreover, the projection type display device can use a Half-V type FLC element for creating bright and sharp moving pictures.

Abstract: A display apparatus is constituted by a display device including a plurality of pixels and control means for effecting a plurality of displaying operations at each pixel. Each of the displaying operation includes at least a first operation for displaying a first image at a first luminance and a second operation for displaying a second image substantially identical to the first image at a second luminance, said first and second luminances being non-zero and different from each other. One of the first and second luminances may preferably be smaller than ⅕ of the other luminance.

Abstract: A display apparatus is constituted by a display device including a plurality of pixels and control means for effecting a plurality of displaying operations at each pixel. Each of the displaying operation includes at least a first operation for displaying a first image at a first luminance and a second operation for displaying a second image substantially identical to the first image at a second luminance, said first and second luminances being non-zero and different from each other. One of the first and second luminances may preferably be smaller than ⅕ of the other luminance.

Abstract: A projection type display device includes a light source, a picture information display element, and a light deflection device with a function to deflect light from the light source and irradiate the deflected light on a region of the picture information display element. The light deflection device scans the region on the picture information display element to be irradiated with light over the entire picture information display element within each frame period to thereby project a picture. A picture is displayed by changing the region on the picture information display element irradiated by light within a period of each one frame. The projection type display device provides sharp moving pictures and bright images. Furthermore, the projection type display device provides a wide dynamic range and faithful tone reproducibility for pictures that are mainly dark images. Moreover, the projection type display device can use a Half-V type FLC element for creating bright and sharp moving pictures.

Abstract: A liquid crystal device is constituted by a layer of a chiral smectic liquid crystal, a pair of substrates oppositely disposed to sandwich the liquid crystal and each provided with an electrode for applying a voltage to the liquid crystal, at least one of the substrates being provided with a uniaxial aligning axis for aligning the liquid crystal, and a polarizer disposed on at least one of the substrates.