A display device includes: a display panel configured to display a parallax image including a first image to be viewed by a first eye of a user and a second image to be viewed by a second eye of the user; and an optical member including a plurality of optical elements arranged along a predetermined direction which includes a component in a parallax direction of the first eye and the second eye. A beam direction of the parallax image is defined by the plurality of optical elements. The display panel includes a plurality of subpixels including a plurality of minipixel. Each of the minipixels included in the plurality of subpixels is configured to be able to display different images.

A head-up display system includes a three-dimensional display device, an optical member, and an accelerometer. The three-dimensional display device includes a display panel, an optical element, and a controller. The display panel displays an image. The optical element defines a traveling direction of image light emitted from the display panel. The optical member reflects the image light from the three-dimensional display device toward a user's eye. The optical member is at a fixed position relative to the three-dimensional display device. The accelerometer detects acceleration of the three-dimensional display device. The controller controls a position of the image on the display panel based on the acceleration.

A head-up display system includes a three-dimensional display device, an optical member, and an accelerometer. The three-dimensional display device includes a display panel, an optical element, and a controller. The display panel displays an image. The optical element defines a traveling direction of image light emitted from the display panel. The optical member reflects the image light from the three-dimensional display device toward a user's eye. The optical member is at a fixed position relative to the three-dimensional display device. The accelerometer detects acceleration of the three-dimensional display device. The controller controls a position of the image on the display panel based on the acceleration.

A display device includes a display portion including sub-pixels, and a light control portion overlapping the display portion. The display portion includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, each of the red sub-pixel, the green sub-pixel, and the blue sub-pixel is shaped in a parallelogram, and inclined at a first angle of greater than or equal to 4° and less than or equal to 16° with respect to the second direction. The light control portion is inclined at a second angle substantially equivalent to arctan (2/9) with respect to the second direction.

A light guide plate for presenting a stereoscopic image via parallax includes: a plurality of deflectors arranged in rows parallel to an incidence surface through which light from a light source enters the light guide plate, the light totally reflecting inside the light guide plate while being guided therethrough, the plurality of deflectors including a reflection surface for reflecting and causing an emission surface to emit said light; and the reflection surfaces in a row of the plurality of deflectors are all oriented in the same direction with the orientation of the reflection surfaces changing for each row in accordance with distance from the incidence surface.

According to one embodiment, a display device includes a display area, a light control element, a projection surface and at least one of one or more mirrors or one or more lenses. The display area includes subpixels, and includes a first area containing first subpixels in the subpixels and a second area containing second subpixels in the subpixels. The light control element is overlapped with the first area. The projection surface projects an image displayed in the display area. A virtual image perceived by a user who views the projection surface includes a first virtual image corresponding to the first area and perceived as a stereoscopic virtual image, and a second virtual image corresponding to the second area and perceived as a planar virtual image.

A stereoscopic virtual image display module includes a display panel, a first optical device set, and a second optical device. The display panel includes an active area that outputs image light. The first optical device set reflects the image light toward a user to allow the user to view a virtual image corresponding to the active area. The second optical device changes or restricts a ray direction of the image light traveling from a first active area included in the active area through the first optical device set toward the user. The second optical device allows first image light to enter a left eye and allows second image light to enter a right eye. The module allows each eye of the user to view a virtual image corresponding to the first active area at a first pixel density higher than or equal to 60 pixels per degree.

A stereoscopic virtual image display module includes a display panel, a first optical device set, and a second optical device. The display panel includes an active area that outputs image light. The first optical device set reflects the image light toward a user to allow the user to view a virtual image corresponding to the active area. The second optical device changes or restricts a ray direction of the image light traveling from a first active area included in the active area through the first optical device set toward the user. The second optical device allows first image light to enter a left eye and allows second image light to enter a right eye. The module allows each eye of the user to view a virtual image corresponding to the first active area at a first pixel density higher than or equal to 60 pixels per degree.

A first stereoscopic image display device includes a light guide plate having a plurality of reflectors and causes an observer to recognize an undistorted stereoscopic image even when the observer views a stereoscopic image from a high angle with respect to a direction normal to the front surface of the light guide plate. In a plan view from a direction vertical to an outgoing surface, when four quadrants are specified for each of the reflectors, the four quadrants taking a position of each of the reflectors as an origin, the four quadrants being divided by two straight lines orthogonal to each other and inclined 45° with respect to a direction in which the incident light is incident on each of the reflectors, light changed in the optical path by each of the reflectors is emitted to a quadrant adjacent to a quadrant on which incident light is incident.

A first stereoscopic image display device includes a light guide plate having a plurality of reflectors and causes an observer to recognize an undistorted stereoscopic image even when the observer views a stereoscopic image from a high angle with respect to a direction normal to the front surface of the light guide plate. In a plan view from a direction vertical to an outgoing surface, when four quadrants are specified for each of the reflectors, the four quadrants taking a position of each of the reflectors as an origin, the four quadrants being divided by two straight lines orthogonal to each other and inclined 45° with respect to a direction in which the incident light is incident on each of the reflectors, light changed in the optical path by each of the reflectors is emitted to a quadrant adjacent to a quadrant on which incident light is incident.