Abstract: In a liquid crystal display device, the liquid crystal panel has a display surface of a planar shape on which a plurality of pixels are located. The front protective plate is located so as to face the display surface of the liquid crystal panel. The optical path changing portion is located between an emission surface of the front protective plate and an air layer located closer to the back side than the emission surface is and located closest to the emission surface. The optical path changing portion changes an optical path of light that enters the optical path changing portion so as to expand an emission angle when the incident light is emitted from the emission surface of the front protective plate.

Abstract: A viewing angle between a wide viewing angle and a narrow viewing angle is switched, and the viewing angle is suppressed from becoming excessively narrow when the viewing angle is switched to the narrow viewing angle. The ultraviolet light guide plate is superimposed on the display panel. A first main surface of the ultraviolet light guide plate is on a side where the pixels are disposed. The film is disposed on the first main surface of the ultraviolet light guide plate. Openings of the film are disposed on an optical path that passes through the pixels and travels in a first direction. Non-opening portions of the film are disposed on an optical path that passes through the pixels and travels in a second direction. The film is made of a photochromic photosensitive material. The ultraviolet light source irradiates an end surface of the ultraviolet light guide plate with ultraviolet light.

Abstract: A liquid crystal display device includes a narrow light distribution backlight, a transparent backlight disposed in front of the narrow light distribution backlight, and a transmissive liquid crystal panel in a horizontal electrical field mode. The transparent backlight is a sidelight type backlight including a transparent light guide plate disposed to face the narrow light distribution backlight and a light source disposed on a side surface of the light guide plate. Prism-like irregularities extending in a vertical direction are formed on a surface of the light guide plate on a side of the narrow light distribution backlight. An electrode having a comb-like shape extending in a horizontal direction is disposed in each pixel of the transmissive liquid crystal panel.

Abstract: The object is to provide a display device with a superior viewing angle. The display device includes a display portion, a liquid-crystal barrier portion, first to third polarizing layers, and at least one viewing-angle compensation layer. The liquid-crystal barrier portion is disposed on one side of the display portion, and adjusts an intensity of light of the display portion. The first polarizing layer is disposed opposite to the liquid-crystal barrier portion relative to the display portion. The second polarizing layer is interposed between the display portion and the liquid-crystal barrier portion. The third polarizing layer is disposed opposite to the display portion relative to the liquid-crystal barrier portion. The viewing-angle compensation layer is interposed between the liquid-crystal barrier portion and the third polarizing layer, and no viewing-angle compensation layer is interposed between the second polarizing layer and the liquid-crystal barrier portion.

Abstract: An object of the present invention is to reduce luminance unevenness caused by interference between a pixel and a PS in a barrier panel without making a design of the PS complicated in a parallax barrier system stereoscopic display device. A plurality of pixels are arranged at a regular pitch in an x direction and a y direction. A light barrier element includes a pair of glass substrates, a liquid crystal layer provided between the glass substrates, and a plurality of PSs provided between the glass substrates. The plurality of PSs are arranged at a regular pitch in the x direction and the y direction. Arrangement pitches of the plurality of PSs in the x direction and the y direction are not integral multiples of arrangement pitches of the plurality of pixels in the x direction and the y direction, respectively.

Abstract: A viewing angle between a wide viewing angle and a narrow viewing angle is switched, and the viewing angle is suppressed from becoming excessively narrow when the viewing angle is switched to the narrow viewing angle. The ultraviolet light guide plate is superimposed on the display panel. A first main surface of the ultraviolet light guide plate is on a side where the pixels are disposed. The film is disposed on the first main surface of the ultraviolet light guide plate. Openings of the film are disposed on an optical path that passes through the pixels and travels in a first direction. Non-opening portions of the film are disposed on an optical path that passes through the pixels and travels in a second direction. The film is made of a photochromic photosensitive material. The ultraviolet light source irradiates an end surface of the ultraviolet light guide plate with ultraviolet light.

Abstract: A liquid crystal display device includes a narrow light distribution backlight, a transparent backlight disposed in front of the narrow light distribution backlight, and a transmissive liquid crystal panel in a horizontal electrical field mode. The transparent backlight is a sidelight type backlight including a transparent light guide plate disposed to face the narrow light distribution backlight and a light source disposed on a side surface of the light guide plate. Prism-like irregularities extending in a vertical direction are formed on a surface of the light guide plate on a side of the narrow light distribution backlight. An electrode having a comb-like shape extending in a horizontal direction is disposed in each pixel of the transmissive liquid crystal panel.

Abstract: An object of the present invention is to reduce luminance unevenness caused by interference between a pixel and a PS in a barrier panel without making a design of the PS complicated in a parallax barrier system stereoscopic display device. A plurality of pixels are arranged at a regular pitch in an x direction and a y direction. A light barrier element includes a pair of glass substrates, a liquid crystal layer provided between the glass substrates, and a plurality of PSs provided between the glass substrates. The plurality of PSs are arranged at a regular pitch in the x direction and the y direction. Arrangement pitches of the plurality of PSs in the x direction and the y direction are not integral multiples of arrangement pitches of the plurality of pixels in the x direction and the y direction, respectively.

Abstract: A display device includes a display panel, parallax barrier, and a backlight. The parallax barrier includes a liquid crystal layer, a first electrode layer, and a second electrode layer. The first electrode layer is disposed while corresponding to a plurality of pixels, and the first electrode layer includes 2N divided electrode layers divided from each other in a unit region corresponding to one pixel set. A first voltage applied to at least one of the divided electrode layers located at an end of the light shielding part is lower than a second voltage applied to at least one of the divided electrode layers located at a position except for the end of the light shielding part.

Abstract: A stereoscopic image display device reduces the possibility of an observer visually recognizing emission or dark lines even while being away from a position suitable for visually recognizing stereoscopic images. A parallax barrier shutter panel includes sub-openings switchable between a light transmission state and a light shielding state. A panel controller changes the pattern of integrated openings configured by sub-openings in the light transmission state in accordance with the position of the observer. When the position of the observer is included in a designed stereoscopic region, the panel controller applies cyclic patterns connected by boundaries among which a phase shift exists, to the integrated openings in accordance with the position of the observer. When the position of the observer is no longer included in the designed stereoscopic region, the pattern of the integrated openings is adjusted to cause the boundaries to disappear while maintaining one cycle.

Abstract: The object is to provide a display device with a superior viewing angle. The display device includes a display portion, a liquid-crystal barrier portion, first to third polarizing layers, and at least one viewing-angle compensation layer. The liquid-crystal barrier portion is disposed on one side of the display portion, and adjusts an intensity of light of the display portion. The first polarizing layer is disposed opposite to the liquid-crystal barrier portion relative to the display portion. The second polarizing layer is interposed between the display portion and the liquid-crystal barrier portion. The third polarizing layer is disposed opposite to the display portion relative to the liquid-crystal barrier portion. The viewing-angle compensation layer is interposed between the liquid-crystal barrier portion and the third polarizing layer, and no viewing-angle compensation layer is interposed between the second polarizing layer and the liquid-crystal barrier portion.

Abstract: A display panel includes sub-pixel pairs arranged laterally at a predetermined pitch, the sub-pixel pair including two sub pixels displaying images for right and left eyes respectively. A parallax-barrier shutter panel includes sub apertures switching light-transmitting and light-blocking states by driving a liquid crystal layer held between two transparent substrates with transparent electrodes extending vertically. The sub apertures are arranged laterally at a pitch obtained by dividing a reference parallax-barrier pitch by N (N being an even number equal to or greater than four), the reference parallax-barrier pitch being determined on the basis of a predetermined design observation distance and the pitch of the sub-pixel pairs. The parallax-barrier shutter panel includes common driving areas obtained by dividing a display area laterally.

Abstract: The display device includes a display panel on which sub-pixel pairs are arranged in a lateral direction, and a parallax barrier shutter panel on which sub-openings that can be changed between a light transmittance state and a light-shielding state are arranged in a lateral direction. Arbitrary allocated number of adjacent sub-openings among the plural sub-openings belonging to a reference parallax barrier pitch are put into a light transmittance state, and the remaining sub-openings are put into a light-shielding state, so that a general opening is formed on the parallax barrier shutter panel. A sub-opening pitch of the sub-opening on the boundary part between the adjacent common driving areas is different from the sub-opening pitch of the other sub-openings.

Abstract: A display panel has a first viewing-angle characteristic for a first yellow-shift direction that is an oblique visual-field direction in which an image shifts to yellow in white display and for a first blue-shift direction that is a visual field direction in which an image shifts to blue in white display. A parallax barrier panel has a second viewing-angle characteristic for a second yellow-shift direction that is an oblique visual-field direction in which an image shifts to yellow in white display and for a second blue-shift direction that is a visual field direction in which an image shifts to blue in white display. The display panel and the parallax barrier panel are laminated such that the first yellow-shift direction and the second blue-shift direction agree with each other and that the first blue-shift direction and the second yellow-shift direction agree with each other.

Abstract: In a liquid crystal display device, the liquid crystal panel has a display surface of a planar shape on which a plurality of pixels are located. The front protective plate is located so as to face the display surface of the liquid crystal panel. The optical path changing portion is located between an emission surface of the front protective plate and an air layer located closer to the back side than the emission surface is and located closest to the emission surface. The optical path changing portion changes an optical path of light that enters the optical path changing portion so as to expand an emission angle when the incident light is emitted from the emission surface of the front protective plate.

Abstract: The present invention relates to an area light source device and a display device using the area light source device. The present invention includes a point light source, and a light guide plate. The light guide plate includes a protruding structure on a light entrance surface side. The protruding structure protrudes from a light exit surface side or a counter light exit surface side opposite from the light exit surface. The point light source includes an arrangement of point light sources. The protruding structure is configured such that oblique cylinders each having a semicircular upper surface protrude and arranged in a direction of the arrangement of the point light sources. The point light sources are arranged so that the lines of intersection of adjacent ones of the oblique cylinders coincide with the middles of the point light sources, respectively.

Abstract: The display device includes a display panel on which sub-pixel pairs are arranged in a lateral direction, and a parallax barrier shutter panel on which sub-openings that can be changed between a light transmittance state and a light-shielding state are arranged in a lateral direction. Arbitrary allocated number of adjacent sub-openings among the plural sub-openings belonging to a reference parallax barrier pitch are put into a light transmittance state, and the remaining sub-openings are put into a light-shielding state, so that a general opening is formed on the parallax barrier shutter panel. A sub-opening pitch of the sub-opening on the boundary part between the adjacent common driving areas is different from the sub-opening pitch of the other sub-openings.

Abstract: A one-pixel structure of a display panel included in an auto-stereoscopic image display device adopts an in-plane switching mode. Transparent counter electrodes that are not provided in a liquid crystal panel of a normal in-plane switching mode are formed correspondingly to pixel peripheral regions on a second transparent substrate side and, in 3-dimensional image display, a vertical electric field is forcibly generated between the transparent counter electrodes and the comb-shaped electrodes, which causes the liquid crystal molecules to rise to show black display in the pixel peripheral regions. In 2-dimensional image display, meanwhile, the transparent counter electrodes are set to be floating, and the display panel is caused to have a structure substantially equivalent to a structure in which the transparent counter electrodes are not provided, to thereby make the display in pixel peripheral regions identical to the display (brightness) in a pixel main region.

Abstract: The display device includes a display panel on which sub-pixel pairs are arranged in a lateral direction, and a parallax barrier shutter panel on which sub-openings that can be changed between a light transmittance state and a light-shielding state are arranged in a lateral direction. Arbitrary allocated number of adjacent sub-openings among the plural sub-openings belonging to a reference parallax barrier pitch are put into a light transmittance state, and the remaining sub-openings are put into a light-shielding state, so that a general opening is formed on the parallax barrier shutter panel. A sub-opening pitch of the sub-opening on the boundary part between the adjacent common driving areas is different from the sub-opening pitch of the other sub-openings.

Abstract: A one-pixel structure of a display panel included in an auto-stereoscopic image display device adopts an in-plane switching mode. Transparent counter electrodes that are not provided in a liquid crystal panel of a normal in-plane switching mode are formed correspondingly to pixel peripheral regions on a second transparent substrate side and, in 3-dimensional image display, a vertical electric field is forcibly generated between the transparent counter electrodes and the comb-shaped electrodes, which causes the liquid crystal molecules to rise to show black display in the pixel peripheral regions. In 2-dimensional image display, meanwhile, the transparent counter electrodes are set to be floating, and the display panel is caused to have a structure substantially equivalent to a structure in which the transparent counter electrodes are not provided, to thereby make the display in pixel peripheral regions identical to the display (brightness) in a pixel main region.