A camera includes an image sensor, a signal processor, and an output unit. The image sensor obtains a first image being a subject image including an eye of a user of a head-up display. The signal processor generates a second image by reducing a resolution of an area of the first image other than an eyebox area. The eyebox area is an area within which a virtual image displayable by the head-up display is viewable by the eye of the user. The output unit outputs the second image to the head-up display.

A three-dimensional display device includes a display panel that displays a parallax image, an optical panel including a plurality of less-transmissive portions and a plurality of transmissive portions repeatedly arranged alternately in a parallax direction, and a controller that controls the display panel. Each of the plurality of transmissive portions has a first width in the parallax direction greater than a second width of each of the plurality of less-transmissive portions in the parallax direction. The controller causes the display panel to display a black image in a binocular viewable area on the display panel viewable to two eyes of a user to allow parallax separation of the parallax image.

A three-dimensional display device includes a display panel that displays a parallax image, an optical panel including a plurality of less-transmissive portions and a plurality of transmissive portions repeatedly arranged alternately in a parallax direction, and a controller that controls the display panel. Each of the plurality of transmissive portions has a first width in the parallax direction greater than a second width of each of the plurality of less-transmissive portions in the parallax direction. The controller causes the display panel to display a black image in a binocular viewable area on the display panel viewable to two eyes of a user to allow parallax separation of the parallax image.

A display device, including a display panel, a stereoscopic structure, and a light control structure, is provided. The stereoscopic structure is disposed on the display panel, wherein the stereoscopic structure includes multiple stereoscopic units, and the stereoscopic units extend in a first direction. The light control structure is disposed between the display panel and the stereoscopic structure, wherein the light control structure includes multiple light control units, and the light control units extend in a second direction. An included angle between the first direction and the second direction is greater than 0 degrees and less than 180 degrees.

A display device, including a display panel, a stereoscopic structure, and a light control structure, is provided. The stereoscopic structure is disposed on the display panel, wherein the stereoscopic structure includes multiple stereoscopic units, and the stereoscopic units extend in a first direction. The light control structure is disposed between the display panel and the stereoscopic structure, wherein the light control structure includes multiple light control units, and the light control units extend in a second direction. An included angle between the first direction and the second direction is greater than 0 degrees and less than 180 degrees.

A three-dimensional display device includes a display panel, a parallax barrier, an acquisition section, a memory, and a controller. The display panel is configured to display a parallax image and emit image light corresponding to the parallax image. The parallax barrier includes a surface configured to define a direction of image light. The acquisition section is configured to acquire positional data indicating eye positions from a detection device which is configured to detect eye positions based on photographed images which are acquired from a camera which is configured to image user's eyes. The memory is configured to store the positional data which are acquired by the acquisition section. The controller is configured to output predicted eye positions based on the positional data stored in the memory, and cause the display panel to display the parallax image, based on the predicted eye positions. The controller is configured to generate a left-eye image and a right-eye image based on a first predicted eye position, and combine the left-eye image and the right-eye image into a parallax image based on a second predicted eye position, which is different from the first predicted eye position.

A floating image generation device is disclosed, which includes a light source, an image generation module, and a floating image generation unit. The image generation module is disposed above the light source and includes a shading unit and an image generation unit. The shading unit is capable of changing light transmissivity state. The image generation unit is disposed above the shading unit. The floating image generation unit is disposed above the image generation unit. The light source emits a light passing through the shading unit, the image generation unit, and the floating image generation unit to generate a first floating image when the shading unit is in a first light transmissivity state. The light source emits a light passing through the shading unit, the image generation unit, and the floating image generation unit to generate a second floating image when the shading unit is in a second light transmissivity state.

A head-up display includes a display panel, a parallax barrier, an optical system including a reflector and an optical member, and a controller. The optical system projects a virtual image of an image displayed by the display panel onto a virtual image plane. The controller controls the display panel such that first second images which have a parallax with each other are projected as a three-dimensional image in a field of view of the user, and a convergence angle at which the user views a point on the three-dimensional image is equal to or less than a maximum convergence angle which is greater by 0.43 degrees than a convergence angle for viewing a point on the virtual image plane and is equal to or greater than a minimum convergence angle which is less by 0.43 degrees than the convergence angle for viewing a point on the virtual image plane.

An electronic device includes a display device configured to output an image, a parallax optical element configured to provide a light corresponding to the image output from the display device, to an eyebox of a user, and a processor configured to adjust a parameter of the parallax optical element based on a change of a look down angle (LDA) between the eyebox and a virtual image plane formed by the display device and the parallax optical element.

An electronic device includes a display device configured to output an image, a parallax optical element configured to provide a light corresponding to the image output from the display device, to an eyebox of a user, and a processor configured to adjust a parameter of the parallax optical element based on a change of a look down angle (LDA) between the eyebox and a virtual image plane formed by the display device and the parallax optical element.