Provided is a head-up display having excellent handling properties. This head-up display is provided with a display panel, a substrate including a light source which illuminates the display panel from a rear surface thereof, a heat sink which dissipates heat transferred from the substrate, and a case which accommodates the heat sink. The case includes an opening exposing at least a portion of the heat sink, and a protecting wall which has a larger amount of protrusion than the amount of protrusion of the heat sink protruding from the opening, and which protects the heat sink protruding from the opening.

Herein is disclosed a virtual embodiment display system comprising one or more image sensors, configured to receive one or more images of a vehicle occupant; one or more processors, configured to determine a gaze direction of the vehicle occupant from the one or more images; select a display location corresponding to the determined gaze direction; and control an image display device to display a virtual embodiment of an intelligent agent at the display location; the image display device, configured to display the virtual embodiment of the intelligent agent at the selected display location according to the one or more processors.

A head-up display of the present disclosure projects a display image on a transparent reflecting member. The head-up display includes: a display device that displays the display image; and a projection optical system that projects the display image displayed on the display device. On an assumption that light reaching a center of a viewpoint region of the observer and corresponding to a center of the virtual image is reference light, the projection optical system includes a prism element that has an incident surface, a reflection surface, and an emitting surface different from the incident surface sequentially in an optical path from the display device. The emitting surface is inclined to the reference light. An inclination amount .sub.2 of the reference light emitted from the emitting surface with respect to the emitting surface lies in a range of 15<|.sub.2|<45 in the optical path from the display device.

An information provision device and an information provision method. Each of the information provision device and information provision method includes projecting an image light to a light transmission member so as to display a for-driver information image, sensing a relative distance of an object to be detected existing around the mobile object in the direction of travel, detecting a location of a viewpoint of the driver, and changing a position at which an object image indicating the object to be detected is displayed according to a result of the detecting so as to change a perception distance of the driver influenced by a motion parallax of the object image according to the relative distance of the object to be detected in the direction of travel.

An SPI-based HUD backlight control method places multiple backlight values obtained by calculation into a backlight setting command and transmits the same to an LED controller via an SPI bus. After obtaining the backlight setting command, the LED controller sequentially applies one backlight value in the backlight setting command each time a frame synchronization signal is obtained. The method reduces the SPI bus load, so that the smoothness of backlight variation is increased, thereby ameliorating display flicker.

An optical scanning device includes: a light source unit configured to emit a light beam; a light deflecting unit configured to two-dimensionally deflect the light beam in a main scanning direction and a sub-scanning direction orthogonal to the main scanning direction; and an image formation unit configured to form an image by two-dimensional scanning of the light beam performed by the light deflecting unit, in which a flat plate configured to transmit light incident on the light deflecting unit and deflected reflection light from the light deflecting unit is arranged in an optical path of the light beam between the light deflecting unit and the image formation unit, and the flat plate is inclined with respect to the image formation unit in a cross section in the sub-scanning direction.

A compact head-up display device is provided. For that purpose, the head-up display device includes a projection optical system which includes an image forming unit to display image information and an ocular optical system to reflect light emitted from the image forming unit to display a virtual image. In the ocular optical system, a free-form surface lens and a free-form surface concave mirror are arranged in order from the image forming unit. The shape of the free-form surface concave mirror is such that curvature radius RY1 in projection on a vertical cross section of the coordinate system of an eye-box is smaller than curvature radius RX1 in projection on a horizontal cross section.

The invention relates to a head-up display device, a vehicle comprising such device and a method of forming an image in a head-up display device. The head-up display device is adapted to project an image on an image surface, such as a windshield. The device comprises a waveguide capable of guiding light carrying the image to be displayed, and an optical correction element. According to the invention, the waveguide is configured to couple light propagating therein towards the optical correction element, and the optical correction element is further configured to perform an optical function for said light and to direct the light towards the image surface through the waveguide.

A laminated glazing incorporates an electrically controllable device and the manufacture thereof including an operation of preassembly with a thin plastic strip.

A head-up display (HUD) system for a vehicle comprises a windshield, a projector adapted to project an image onto an inner surface of the windshield, a HUD glare trap lens positioned between the projector and the windshield, the HUD glare trap lens adapted to allow the projected image to pass through the HUD glare trap lens to the inner surface of the windshield, and to reflect sunlight that passes through the windshield to the HUD glare trap lens, and a light trap adapted to deflect sunlight that passes through the windshield and is reflected by the HUD glare trap lens, to prevent the reflected sunlight from interfering with the HUD image projected onto the windshield.