Abstract: A display device includes a light guide plate 2 capable of displaying a plurality of patterns (21-1 to 21-9) and including an incident surface; a plurality of light sources (3-1 to 3-9) disposed opposite to the incident surface and corresponding to the plurality of patterns; a storage 5 configured to store a reference table that represents a relationship between a turn-on state number and a combination of light sources to be turned on among the plurality of light sources for each of a plurality of the turn-on state numbers; and a controller 7 configured to specify the combination of light sources to be turned on by referring to the reference table, the combination corresponding to the turn-on state number included in turn-on control information, and control turn-on and turn-off of each light source according to the combination of the light sources.

Abstract: A light guide plate presents a plurality of patterns via prisms illuminated by light sources aligned along one sidewall of the light guide plate. Each light source corresponds to a different pattern. A storage unit stores lighting sequence information and a controller controls the turning on and off of the plurality of light sources in accordance with the lighting sequence information, thereby illuminating the patterns. Visible light emitted from the light sources to enters the light guide plate via an incidence surface. The prisms making up the patterns reflect only the visible light emitted from a light source corresponding to a particular pattern.

Abstract: A display device has a projector having a light guide plate that guides light incident from an end portion and deflects the light guided to emit the light from a projection surface facing a viewer in a first direction, the projector being configured to emit light from the projection surface to project an image in a space viewable by the viewer, and a rotator configured to rotate the projector around the first direction. When a first end on the projection surface is located at a first position being an upper side in a second direction orthogonal to the first direction, the image is viewed as a stereoscopic image by the viewer. When the rotator rotates the projector and the first end is located at a second position different from the first position, the image is viewed as a planar image by the viewer.

Abstract: A display device includes: a first display unit which is a transmissive display unit; a transparent backlight formed of transparent material, provided relative to the first display unit opposite the viewing surface of the first display unit, and configured to emit light toward the first display unit; a light source configured to output object light to the transparent backlight where light from an object provided opposite the light emission plane of the transparent backlight is output toward the transparent backlight and the first display unit; and a controller configured to control the first display unit, the transparent backlight, and the light source so that light emitted from the transparent backlight shows an image on the first display unit, and so that the object light can pass through the transparent backlight and the first display unit and be output.

Abstract: A presentation control device includes: a first display unit which is a transmissive display unit; a transparent backlight formed of transparent material, provided relative to the first display unit opposite the viewing surface of the first display unit, and configured to emit light toward the first display unit; a light source configured to output object light to the transparent backlight where light from an object provided opposite the light emission plane of the transparent backlight is output toward the transparent backlight and the first display unit; and a display device including a controller configured to control the first display unit, the transparent backlight, and the light source so that light emitted from the transparent backlight shows an image on the first display unit, and so that the object light can pass through the transparent backlight and the first display unit and be output.

Abstract: A display device has a display panel including an image display area in which an image is displayable, a light guide plate arranged at a back of the display panel, the light guide plate comprising a transparent material and having a first incident surface and a second incident surface, a first light source facing the first incident surface, a second light source facing the second incident surface, and a controller configured to control turning on and turning off of the first light source and the second light source and to control an image displayed on the display panel. The light guide plate includes an emission surface facing the display panel, and a plurality of first prisms arranged in an area in correspondence with the image display area on a surface opposite to the emission surface.

Abstract: A display device including: a light guide plate configured to present a plurality of patterns; a plurality of light sources aligned along one sidewall of the light guide plate with each light source corresponding to a pattern among the plurality of patterns; a storage unit configured to store lighting sequence information; and a controller configured to control the turning on and off of the plurality of light sources in accordance with the lighting sequence information; the light guide plate including: an incidence surface configured to allow visible light emitted from the light sources to enter the light guide plate; and for each of the plurality of patterns, a plurality of prisms configured to reflect the visible light emitted from a light source corresponding to the pattern and entering the light guide plate from the incidence surface toward the other surface of the light guide plate.

Abstract: A display device has a first display panel including an image display area in which an image is displayable, a light guide plate arranged at a back of the first display panel, the light guide plate comprising a transparent material, a plurality of light sources respectively facing a plurality of positions on side surfaces of the light guide plate, a second display panel arranged at a back of the light guide plate, the second display panel being configured to display an image viewable through the light guide plate and the first display panel, and a controller configured to control turning on and turning off of the plurality of light sources and to control a first image displayed on the first display panel and a second image displayed on the second display panel. The light guide plate includes an emission surface facing the first display panel.

Abstract: A presentation control device includes: a first display unit which is a transmissive display unit; a transparent backlight formed of transparent material, provided relative to the first display unit opposite the viewing surface of the first display unit, and configured to emit light toward the first display unit; a light source configured to output object light to the transparent backlight where light from an object provided opposite the light emission plane of the transparent backlight is output toward the transparent backlight and the first display unit; and a display device including a controller configured to control the first display unit, the transparent backlight, and the light source so that light emitted from the transparent backlight shows an image on the first display unit, and so that the object light can pass through the transparent backlight and the first display unit and be output.

Abstract: A display device has a liquid crystal panel that switches between a transparent state and an opaque state, a first light source, a light guide plate arranged on a back surface of the liquid crystal panel and made of a transparent material, the light guide plate having an incident surface facing the first light source and an outgoing surface facing the back surface of the liquid crystal panel, propagating light emitted from the first light source and incident through the incident surface, and outputting the light toward the liquid crystal panel from the outgoing surface, and a second light source configured to illuminate an object arranged on an opposite side to the liquid crystal panel with the light guide plate interposed therebetween.

Abstract: A display device includes: a first display unit which is a transmissive display unit; a transparent backlight formed of transparent material, provided relative to the first display unit opposite the viewing surface of the first display unit, and configured to emit light toward the first display unit; a light source configured to output object light to the transparent backlight where light from an object provided opposite the light emission plane of the transparent backlight is output toward the transparent backlight and the first display unit; and a controller configured to control the first display unit, the transparent backlight, and the light source so that light emitted from the transparent backlight shows an image on the first display unit, and so that the object light can pass through the transparent backlight and the first display unit and be output.

Abstract: A display device has a first display panel including an image display area in which an image is displayable, a light guide plate arranged at a back of the first display panel, the light guide plate comprising a transparent material, a plurality of light sources respectively facing a plurality of positions on side surfaces of the light guide plate, a second display panel arranged at a back of the light guide plate, the second display panel being configured to display an image viewable through the light guide plate and the first display panel, and a controller configured to control turning on and turning off of the plurality of light sources and to control a first image displayed on the first display panel and a second image displayed on the second display panel. The light guide plate includes an emission surface facing the first display panel.

Abstract: A display device has a display panel including an image display area in which an image is displayable, a light guide plate arranged at a back of the display panel, the light guide plate comprising a transparent material and having a first incident surface and a second incident surface, a first light source facing the first incident surface, a second light source facing the second incident surface, and a controller configured to control turning on and turning off of the first light source and the second light source and to control an image displayed on the display panel. The light guide plate includes an emission surface facing the display panel, and a plurality of first prisms arranged in an area in correspondence with the image display area on a surface opposite to the emission surface.

Abstract: A display device has a liquid crystal panel that switches between a transparent state and an opaque state, a first light source, a light guide plate arranged on a back surface of the liquid crystal panel and made of a transparent material, the light guide plate having an incident surface facing the first light source and an outgoing surface facing the back surface of the liquid crystal panel, propagating light emitted from the first light source and incident through the incident surface, and outputting the light toward the liquid crystal panel from the outgoing surface, and a second light source configured to illuminate an object arranged on an opposite side to the liquid crystal panel with the light guide plate interposed therebetween.

Abstract: A variation in luminance is reduced near a light source without decreasing intensity of a light exit pattern. A light source is disposed and a light exit pattern is formed. The light exit pattern reflects light guided in a light guide plate and outputs the light. In inclined angles of tangents of the light exit patterns in a section passing through a center axis of the light exit pattern, a largest inclined angle of the tangent is defined as a maximum inclined angle of the light exit pattern. At this time, in the light exit pattern provided in the light guide plate, the maximum inclined angle is decreased with increasing distance from a light incident surface in a region near the light incident surface, and the maximum inclined angle is decreased or kept constant with increasing distance from the light incident surface in a region distant from the region near the light incident surface.

Abstract: A light guide plate has a light incident surface configured to be arranged facing a point light source for introducing light from the point light source, a light outputting surface that outputs the light to an outside of the light guide plate, a light introducing section for confining the light from the point light source entered from the light incident surface, and a light guide plate main body having a thickness smaller than a maximum thickness of the light introducing section and being arranged to be continuous with the light introducing section, for outputting the confined light to the outside of the light guide plate from the light outputting surface by a light outputting element.

Abstract: A variation in luminance is reduced near a light source without decreasing intensity of a light exit pattern. A light source is disposed and a light exit pattern is formed. The light exit pattern reflects light guided in a light guide plate and outputs the light. In inclined angles of tangents of the light exit patterns in a section passing through a center axis of the light exit pattern, a largest inclined angle of the tangent is defined as a maximum inclined angle of the light exit pattern. At this time, in the light exit pattern provided in the light guide plate, the maximum inclined angle is decreased with increasing distance from a light incident surface in a region near the light incident surface, and the maximum inclined angle is decreased or kept constant with increasing distance from the light incident surface in a region distant from the region near the light incident surface.

Abstract: A light guide plate (63) includes a light introducing section (65), which is at a position facing a point light source (62), for confining light from the point light source, and a light guide plate main body (64), which has a thickness smaller than a thickness at an end of the light introducing section on the point light source side, for outputting the confined light to an outside from a light outputting surface by light outputting means (70). The light introducing section (65) has an inclined surface (67), which is inclined from a surface of the light introducing section towards a surface of the light guide plate main body (64). The inclined surface (67) has a directivity converting pattern (68) for converting a directivity expansion in a thickness direction of the light guide plate of the light entered to the light introducing section (65) to directivity characteristics tilted towards a direction parallel to a surface direction of the light guide plate.

Abstract: A light guide plate (63) includes a light introducing section (65), which is at a position facing a point light source (62), for confining light from the point light source, and a light guide plate main body (64), which has a thickness smaller than a thickness at an end of the light introducing section on the point light source side, for outputting the confined light to an outside from a light outputting surface by light outputting means (70). The light introducing section (65) has an inclined surface (67), which is inclined from a surface of the light introducing section towards a surface of the light guide plate main body (64). The inclined surface (67) has a directivity converting pattern (68) for converting a directivity expansion in a thickness direction of the light guide plate of the light entered to the light introducing section (65) to directivity characteristics tilted towards a direction parallel to a surface direction of the light guide plate.

Abstract: A surface light source device for preventing the coloring phenomenon in the proximity of a spot light source of a light guide plate making up the surface light source device is disclosed. A spot light source of LED or the like is arranged at an edge of the light guide plate. A multiplicity of deflection patterns having a triangular cross section are arranged on the surface of the light guide plate opposite to the light exiting surface. The light entering the light guide plate are reflected on the deflection patterns and exit from the light exiting surface. The deflection patterns including a plurality of types of deflection patterns having different heights are arranged randomly.