A waveguide head-up display (HUD) includes a waveguide that includes a lower surface and an upper surface and is configured to receive an input and project, based on the input, at least one image from the upper surface and into an eyebox, and a prism arranged at least one of on and above the waveguide. The prism includes a lower surface facing the waveguide and configured to receive the at least one image and an upper surface opposite the lower surface configured to project the at least one image received via the lower surface of the prism. The upper surface of the prism is angled relative to the upper surface of the waveguide such that a first normal of the upper surface of the prism is different from a second normal of the upper surface of the waveguide.

A display device includes: a first panel including a first image-forming surface for forming a first image visually recognized by a user and a plurality of first pixels; a second panel including a second image-forming surface for forming a second image visually recognized by the user and a plurality of second pixels; and a half-wavelength plate located between the first image-forming surface and the second image-forming surface. The half-wavelength plate includes an optical axis, is configured to be capable of transmitting incident light from either one panel of the first panel and the second panel, and of emitting light as emission light to the other panel. A polarization direction of the emission light from the half-wavelength plate is determined based on a polarization direction of the incident light on the half-wavelength plate and a direction of the optical axis.

According to one embodiment, a display device includes an illumination device, a display panel modulating light from the illumination device and emitting image light, a polarized light modulation element transmitting the image light from the display panel and diffusing external light, and a magnification mirror magnifying an image by the image light transmitted through the polarized light modulation element. The polarized light modulation element is a liquid crystal lens including a first substrate, a second substrate, a liquid crystal layer held between the first substrate and the second substrate, and a first control electrode and a second control electrode applying voltage to the liquid crystal layer.

An optical sheet includes a first wedge layer having a first refractive index and including a wedge-shaped prism pattern including an inclined surface having an inclination angle with respect to a plane defined by a first direction and a second direction perpendicular to the first direction and a vertical surface extending in a third direction perpendicular to the first direction and the second direction, a second wedge layer disposed on the first wedge layer and having a second refractive index greater than the first refractive index, and a light blocking pattern disposed between the first wedge layer and the second wedge layer and including a first surface that contacts with the vertical surface and a second surface inclined to have the inclination angle with respect to the plane while contacting with the inclined surface.

A display system of a vehicle displays a virtual image. The display system has a projection device, which is configured to emit display light in order to generate an image, and a reflecting device, which is configured for a first reflection of display light of the projection device arranged above the reflecting device by way of the reflecting device attached in or on an instrument panel of the vehicle. The display light of the projection device incident on the reflecting device is substantially retroreflected. The display system further includes a windshield of the vehicle, which windshield is configured for a second reflection of at least part of the display light, which was reflected by the reflecting device, to the eyes of an observer in the vehicle in order to allow the observer to see, behind the windshield, the virtual image of the image generated by the projection device.

A glass plate structure includes: a glass plate having first and second major surfaces; an antireflection film; and a print portion. The first major surface includes: a curved surface region that is a region of an end portion of the glass plate, is curved convexly, and has a radius of curvature r that is 50% or more of a thickness t of the glass plate; and a flat surface region that is connected to the curved surface region. The antireflection film is a laminate in which a high refractive index layer and a low refractive index layer are laminated alternately. The number of layers of the antireflection film is 12 or smaller. A total thickness of the antireflection film in the flat surface region is 400 nm or smaller. A thickness of an outermost layer of the antireflection film in the flat surface region is 90 nm or larger.

A head-up display device including a display unit, a polarization beam-splitting module, and an optical module is provided. The polarization beam-splitting module receives a first image beam and a second image beam from the display unit, and transmits the first image beam and the second image beam to the optical module. The first image beam and the second image beam are respectively reflected by the optical module to an outside of the head-up display device, and then transmitted to a target element, to form a first virtual image and a second virtual image. By the polarization beam-splitting module, an optical path length of the first image beam from the display unit to a position of the first virtual image formed by itself is longer than an optical path length of the second image beam from the display unit to a position of the second virtual image formed by itself.

A head-up display includes a picture generation unit configured to emit first light for generating a first picture at a position away from a vehicle by a predetermined distance and second light for generating a second picture at a position away from the vehicle by a distance different from the predetermined distance; and a reflection unit configured to reflect the first light and the second light so that the first light and the second light are radiated to a windshield. A first optical element that reduces transmittance of light including at least visible light to be lower than transmittance of the first light is provided between the picture generation unit and the windshield at a position through which the second light passes.

A display module and a method for driving the same, a display apparatus, and a vehicle are provided. The display module includes a backlight component, and a display component and a light-adjusting component that are located at a side of the backlight component facing toward a light-emitting direction of the display module. The backlight component includes a first light guide structure and a light regulating structure. The light-adjusting component includes first and second electrodes, and a first liquid crystal. The display module has a sharing mode and an anti-peeping mode. In the sharing mode, the first electrode and the second electrode are not energized, and the first liquid crystal is in a wide viewing angle state. In the anti-peeping mode, the first electrode and the second electrode drive the first liquid crystal to be in a narrow viewing angle state.

A holographic display system for a motor vehicle includes a coherent light source for generating a beam of coherent light and a spatial light modulator (SLM) having a two-dimensional pixel array, which is encoded with a hologram for modulating a phase of the coherent light. The SLM generates a first diffracted beam associated with a main image and a second diffracted beam associated with a conjugate image, where the first and second diffracted beams are angularly spaced from one another by a first angle. The system further includes an optical component for angularly spacing the first and second diffracted beams from one another by a second angle that is larger than the first angle. The system further includes a display surface receiving the first diffracted beam from the optical component to display the main image, with the display surface being free of the second diffracted beam.