According to one embodiment, when displaying an image on a display panel, projecting an image which is displayed on the display panel, inclining the image which is projected from the display panel at a predetermined angle of bend, and reflecting the image which is projected from the display panel via a prism and guiding the image to a projection surface, a display device corrects input picture image of the prism based on characteristics contrary to the chromatic aberration characteristics of the prism.

An illustrative example assembly includes a display having a first side for displaying at least one image and a second side facing opposite the first side. The display includes a first portion having a first plurality of layers between the first side and the second side. The display includes a second portion having a second plurality of layers between the first side and the second side. The second plurality of layers includes at least one additional layer more than the first plurality of layers. A camera is situated near the second side of the display with a field of view of the camera at least partially aligned with the first portion of the display.

A virtual image display device includes a projection optical system that includes a projection mirror that projects an image display light toward a virtual image presentation plate. The projection mirror has a concavely curved surface and is arranged such that a curvature in a second cross section intersecting the concavely curved surface is larger than a curvature in a first cross section intersecting the concavely curved surface. The second cross section is orthogonal to the first cross section. The display unit is provided at a focal point of a composite optical system within a meridional plane, the composite optical system being formed by the virtual image presentation plate and the projection optical system.

A display device includes a light projector configured to project light including an image, an optical mechanism provided on a path of the light and capable of adjusting a distance from a predetermined position to a position where the light is formed as a virtual image, a concave mirror configured to reflect light passing through the optical mechanism toward a reflector, a first actuator configured to adjust the distance in the optical mechanism, and a controller configured to control the light projector and the first actuator. The controller causes the first actuator to change the distance and causes the light projector to project light including an opening image, at a time of an operation start of the display device.

A display device includes an image generation device configured to allow a viewer to recognize the image, a control device configured to control the image generation device, a light projector configured to output the image as light, an optical mechanism capable of adjusting a distance from a predetermined position to a position at which the light is formed as a virtual image, a concave mirror configured to reflect light passing through the optical mechanism toward a reflector, a first actuator configured to adjust the distance in the optical mechanism, and a second actuator configured to adjust a reflection angle of the concave mirror. The control device estimates a temperature of the light projector, and in a case in which the estimated temperature is equal to or higher than a predetermined upper limit temperature, the control device causes the first actuator to reduce the distance.

A head-up display apparatus mounted on a moving body. The head-up display apparatus projects an image on a projecting portion. The head-up display apparatus includes a light source portion, an imaging element, a cold mirror, and a phase shifter. The light source portion emits a source light. The imaging element generates the image and outputs the light of the image. The light of the image has a predetermined polarization state. The cold mirror reflects the light of the image toward the projecting portion. In the cold mirror, an optical multilayer film is disposed on a translucent base member, and the light of the image obliquely enters the cold mirror along a plane of incidence of the cold mirror. The phase shifter converts the light of the image into an S wave. The phase shifter is disposed on an optical path between the imaging element and the cold mirror.

A border assembly includes a semi-tubular reflector segment and a semi-tubular diffuser segment in front of the reflector segment. The reflector segment includes an inner sidewall and an outer sidewall, and a cavity therebetween. The cavity includes a backspace midway along the reflector segment and a front exit spaced therefrom. The reflector segment is configured, in relation to light emanated from the backspace, to discharge light originating from the emanated light through the front exit all along the reflector segment with a regular intensity, with the discharged light including reflections of the emanated light off the outer sidewall. The diffuser segment includes a back face positioned over the front exit and a front face spaced therefrom. The diffuser segment is configured to diffusively transmit the discharged light, resulting in the front face casting a glow.

An embodiment of a head up display device may comprise: a light source unit; a first light transmitting member which is disposed opposite to the light source unit in the optical axis direction; a second light transmitting member which is disposed opposite to the first light transmitting member in the optical axis direction; a display unit which is disposed opposite to the second light transmitting member in the optical axis direction and to which light having passed through the second light transmitting member is incident; and a light diffusing member which is disposed between the second light transmitting member and the display unit, wherein the display unit is inclined with respect to the optical axis direction, and the light diffusing member is inclined with respect to the optical axis direction so as to be parallel to the display unit.

The liquid crystal illumination device includes a light source projecting light to a liquid crystal panel, a first diffusion unit diffusing the projected light, a first light guide unit including a radially widened reflection surface and reflect the diffused light at the reflection surface, a reflecting mirror including an opening, part of the light guided by the first light guide unit being reflected and returned to inside the first light guide unit, and remaining light passing through the opening, a light collecting unit collecting light passing through an opening on the reflecting mirror, and a second diffusion unit diffusing the collected light toward the liquid crystal panel. The opening on the reflecting mirror is formed correspondingly to a display region where the liquid crystal panel display an image. A haze value of the first diffusion unit is set to a value higher than that of the second diffusion unit.

A display apparatus includes a light-emitting component, a controller, a digital micro-mirror device, a first projection assembly and a second projection assembly. The controller is configured to alternately output a first image signal and a second image signal to the digital micro-mirror device. The digital micro-mirror device is configured such that in response to receiving the first image signal, at least one micro-lens is rotated to a respective first preset position, and that in response to receiving the second image signal, at least one micro-lens is rotated to a respective second preset position. The first projection assembly is configured to receive light reflected by the at least one micro-lens located at the respective first preset position and output a first image. The second projection assembly is configured to receive light reflected by the at least one micro-lens located at the respective second preset position and output a second image.