There is provided a head-up display device which has a small size and of which the aberration is small and the range of an eye box in a vertical direction is wide. The head-up display device 10 includes a first optical system that includes at least one concave mirror arranged along an optical path of display light in order from an image display surface 1, and a second optical system that includes at least one concave mirror arranged along the optical path of the display light in order from the image display surface 1 side. An intermediate image is formed between the first and second optical systems on the optical path, and the first optical system includes a double reflection mirror that reflects the display light twice on the optical path.

An image display device includes: a camera that takes a rear-view image; a rear-view-image display unit including a mirror surface and a display for displaying the rear-view image; a distance obtainer that obtains a distance between a vehicle and a following vehicle; a cutout-image creator that cuts out a cutout image from the taken rear-view image based on a view-angle value; and a display controller that creates, based on the cutout image, a display image matching a size of a display region of the display and controls the display to display the created display image. The cutout-image creator is configured to, based on the obtained distance, determine the view-angle value to such a view-angle value that a size of the following vehicle to be displayed on the display image is equal to a size of the following vehicle that is to reflect in the mirror surface.

A system for detecting command gestures made by a finger of a driver of a motor vehicle, the system including an interface pad, a light source that emits in the infrared toward the pad, an imaging sensor, for capturing images steered by the pad away from the driver, with a base frame and a movable plate, an optical zone of interest seen by the imaging sensor being defined at the interface between the base frame and the plate, the pad including an elastic deformable seal interposed between the base frame and the movable plate, the seal being absorbent at the optical wavelengths of interest, the pad including a reflective strip behind the seal from the point of view of the camera, so that the seal forms a zone that appears dim to the camera, the size of the dim zone depending on the pressure exerted on the plate.

The invention is directed to a head-up display 2 having a light source 231, a diffuser 232,235,236, a transmissive display 3, a mirror element 251 and a transmissive screen 21. According to the invention the head-up display 2 is further provided with a contrast enhancer display 4 that is arranged adjacent to the transmissive display 3.

The purpose of the present invention is to provide a head-up display which does not easily cause a feeling of strangeness in the way in which a virtual image disappears with the movement of a point of view while achieving improved light use efficiency. An image display unit displays, in a display area, a display image comprising a plurality of pixels, and emits display light based on the display image, a projection unit guides the display light from the image display unit to the viewer side, and generates an visual region in which at least part of a virtual image of the display image is visually recognizable, and a light distribution unit adjusts a position to which the display light is distributed with respect to each pixel of the display area to which the display light is emitted or with respect to an area including a plurality of pixels, and distributes the display light such that an area that cannot be visually recognized as the virtual image gradually increases from an end of the display area as the point view moves away from a predetermined reference point of the visual region.

A projector projects a polarized light of an image. A light guide portion guides the light toward a projection member. A polarizing plate on an optical path has a transmission axis along which transmittance of the polarized light becomes maximum. An image longitudinal direction is along a vertical direction of a vehicle. An image lateral direction is perpendicular to the image longitudinal direction. A projection polarization azimuth angle is an azimuth angle of a polarization direction of the light relative to the image lateral direction. A transmission axis azimuth angle is an azimuth angle of the transmission axis of the polarizing plate relative to the image lateral direction. The polarizing plate makes the projection polarization azimuth angle different from the transmission axis azimuth angle to tilt the polarization direction of the light of the image relative to both of the image longitudinal direction and the image lateral direction.

Provided is a small-sized information display device displaying video image information as a virtual image by use of an eyepiece optical system including a concave mirror having desired reflection characteristics in a specific polarization direction, where a liquid crystal display panel is used as a video image light source. The information display device has a liquid crystal display panel as a flat display forming video image information disposed therein, and includes a virtual image optical system including a member to be projected for displaying virtual images in front of a vehicle by making a video image displayed on the liquid crystal display panel reflect on the member to be projected. The virtual image optical system includes a concave mirror, and a reflective film of the concave mirror has desired reflection characteristics in a specific polarization direction, so that virtual images having uniform brightness and chromaticity can be obtained.

A head-up display device is configured to project a display light, which is to be reflected by a concave image forming reflection surface, onto a combiner having the image forming reflection surface a combiner to display a virtual image visible to an occupant. The combiner is located above an upper surface portion of the instrument panel. The projector is configured to project a display light in the form of a light beam. A light guide mirror has a light guide reflection surface and is configured to reflect the display light from the projector toward the image forming reflection surface. The light guide reflection surface is convex.

An imaging system for generating multi-depth virtual images on a display screen includes an image realisation device for forming a source image, and projection optics for rendering a display image on the display screen. The display image is a virtual image corresponding to the source image. The image realisation device includes an image realisation surface having a first and second region, and the image receiving surface and the projection optics are arranged such that a first point in the first region of the image receiving surface and a second point in the second region of the image receiving surface are at a different distance from a focal point of the projection optics. A plurality of surfaces are arranged to direct light from the image realisation surface towards the projection optics.

A virtual image display device includes: a display unit that generates an image display light by modulating an illumination light; and a projection optical system that includes at least a concave mirror for reflecting the image display light toward a virtual image presentation plate. The display unit is provided at a position nearer a focal point within a meridional plane of a composite optical system formed by the virtual image presentation plate and the projection optical system than a focal point within a sagittal plane of the composite optical system.