A head up display arrangement for a motor vehicle includes a head up display module having a picture generation unit emitting a light field. A polarizing device is rotatable between at least a first rotational position and a second rotational position. The polarizing device receives the light field from the picture generation unit and emits the light field regardless of whether the polarizing device is in the first rotational position or the second rotational position. More of the light is emitted by the polarizer in a P-polarization state in the second rotational position than in the first rotational position. A windshield reflects the light field from the polarizing device such that the reflected light field is visible to a human driver of the motor vehicle as a virtual image.

Method and apparatus are disclosed for gaze detection of occupants for vehicle displays. An example vehicle includes a panoramic display including polarized displays. The example vehicle also includes a controller to identify a primary operator interface and a primary passenger interface and detect, via one or more cameras, an operator gaze and a passenger gaze. The controller also is to present the primary operator interface to an operator via one of the polarized displays corresponding with the operator gaze and present the primary passenger interface to a passenger via one of the polarized displays corresponding with the passenger gaze.

A display screen operable on at least a partial area A in two operating modes, free-viewing mode B1, and restricted-viewing mode B2, with the residual display area of the screen outside the area A maintaining a free viewing mode; comprising a first backlight arranged below the residual display area; a second backlight arranged below the area A; a transmissive image generator in front of the backlights; a plate-shaped transparent light guide arranged between the image generator and the backlights that outcouples, through one of its large surfaces, light coupled in through one of its edges; light sources arranged laterally an edge of the light guide, wherein the light guide is transparent to at least 70% of the light emitted by the backlights, and wherein in the B1 mode, the light sources are switched on, and in the B2 mode, the backlights are on and the light sources are off.

A head-up display system including an optical laminate having at least one substrate material and a half-wave plate, and a display unit that makes display light representing a display image into S-polarized light or P-polarized light and emits the S-polarized light or the P-polarized light. In the head-up display system, an angle formed by a polarization axis of the S-polarized light or the P-polarized light incident from a position inclined at not less than 45 and not more than 65 with respect to an axis perpendicular to a surface of the optical laminate and a slow axis of the half-wave plate is not less than 35 and not more than 44.

A viewing angle control sheet located on a light output side of a display device having a display surface curving in accordance with distance from the sloping reflective member, the viewing angle control sheet being curved along the display surface to control a viewing angle of an image displayed on the display surface, the viewing angle control sheet includes light-transmitting portions and light-blocking portions alternately arranged in a curving direction of the display surface, and the light viewing angle control sheet is configured such that 1 satisfies the following expression (1),

[00001]$\begin{array}{cc}\left[\mathrm{expr}..Math.1\right]& \\ .Math..Math.1{\cos }^{-1}\left(\frac{f-\mathrm{df}.Math.\cos .Math..Math..Math..Math.2}{\sqrt{f^2+{\mathrm{df}}^2-2.Math.f.Math.\mathrm{df}.Math.\cos .Math..Math..Math..Math.2}}\right)+.Math..Math.2& \left(1\right)\end{array}$ in which f is a length of the sloping reflective member, df is a distance between a slope origin of the sloping reflective member and a light-output-side end of the light-blocking portions, 1 is a maximum elevation angle of light passing through the light-transmitting portions, and 2 is an elevation angle of the sloping reflective member.

A display panel is attached to an appliance that includes first and second light sources, in which one of the first and second light sources is capable of being turned off when the other is turned on. The display panel basically includes a molded body, a front-side decorative layer, and a sheet-like member. The display panel is capable of individually illuminating a plurality of graphics, which is simultaneously molded and decorated, with light passing through a molded resin. In particular, a first graphic is illuminated in a first window by turning on the first light source, while a first back-side light-shielding region and a second front-side light-shielding region prevent a second graphic from being illuminated. The second graphic is illuminated in a second window by turning on the second light source, while a second back-side light-shielding region and a first front-side light-shielding region prevent the first graphic from being illuminated.

The present disclosure provides a head up display device and system, relating to the field of display technology. The head up display device includes: a first display image generator, configured to generate a first linearly polarized light containing a first image; a second display image generator configured to generate a second linearly polarized light containing a second image; wherein the polarization direction of the first linearly polarized light is perpendicular to the polarization direction of the second linearly polarized light; a first polarizing beam splitter configured to combine the first linearly polarized light and the second linearly polarized light; and an optical component containing a plurality of reflective imaging elements, wherein the optical component is configured to reflect the first image and the second image into a user's eye.

A method for pairing a key fob with a control unit is provided. The key fob executes an ID authenticated key agreement protocol with a pairing device based on a key fob identification to authenticate one another and to generate a first encryption key. The pairing device encrypts a control unit identification using the first encryption key. The key fob receives the encrypted control unit identification transmitted from the pairing device. The key fob then executes an ID authenticated key agreement protocol with the control unit based on the control unit identification to authenticate one another and to generate a second encryption key. The key fob then receives an operational key transmitted from the control unit that is encrypted with the second encryption key.

A head-up display apparatus that is excellent in viewability. A head-up display apparatus according to an embodiment of the present invention includes: a display unit configured to emit projection light, the display unit including a display cell, and a first polarizing plate with a retardation layer, which is arranged on an emission side of the display cell, and which includes a polarizer and a first retardation layer in the stated order from a display cell side; at least one reflector configured to reflect the projection light; and a second polarizing plate with a retardation layer, which is arranged on a reflection surface of the reflector, and which includes a polarizer and a second retardation layer in the stated order from a reflector side. The first retardation layer and the second retardation layer each have an in-plane retardation Re(550) of from 100 nm to 200 nm.

The information display apparatus has a housing with an opening and a transparent cover formed on the opening, the housing includes image-light generating means configured to generate image light that displays the image information and an optical system configured to allow a driver of the vehicle to recognize image information based on the image light from the image-light generating means as a virtual image in front of the windshield. When S-polarized light on the windshield is assumed to be a first polarized wave while polarized light that orthogonally crosses the S-polarized light in a polarizing direction is assumed to be a second polarized wave, the image-light generating means is configured to generate the image light made of the first polarized wave, and a transmittance/reflectance control means blocks a part of the first polarized wave and the second polarized wave of incident external light entering the housing from the opening.