A display screen operable on at least a partial area A in two operating modes, free-viewing mode B1, and restricted-viewing modeB2, 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 display device and a vehicle head-up display apparatus of the present disclosure include a substrate, light source devices, a transmission-type display panel, and an illumination optical system. The light source devices are disposed on the substrate. The illumination optical system guides illumination light from the light source devices to the display panel. The illumination optical system includes a first reflector, a quarter-wave plate, and a reflective polarizer. The first reflector is disposed at a different position on the substrate than the light source devices. The quarter-wave plate is disposed between the first reflector and the display panel. The reflective polarizer is disposed between the quarter-wave plate and the display panel.

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.

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 vehicle includes: a cluster including a display panel, and a barrier panel disposed adjacent the display panel and having a plurality of barriers; an image obtainer acquiring an image; a steering wheel disposed adjacent the cluster and the image obtainer; and a controller configured to determine whether or not a condition for performing a three-dimensional image mode is satisfied based on a manipulation state of the steering wheel, to control operations of the display panel and the barrier panel to recognize a user's line of sight based on the image of the image obtainer, perform the three-dimensional image mode based on the recognized line of sight of the user when the condition is satisfied, and to control the operations of the display panel and the barrier panel to perform a two-dimensional image mode when the is not satisfied.

A display device includes a first polarizing plate including a first polarization region and a first design region, a second polarizing plate including a second polarization region and a second design region, and a third polarizing plate including a third polarization region. A transmittance of light oscillating in a first direction of the polarization regions is maximized, and the design regions are transparent to light regardless of the oscillation direction of light. The first and second polarizing plates are arranged at a distance from each other along a path of the light, the first direction in the first polarization region and the first direction in the second polarization region are different from each other. The third polarizing plate is arranged such that the first direction in the third polarization region is positioned between the first direction in the first polarization region and the first direction in the second polarization region.

The various embodiments set forth a display device that includes a liquid crystal module, a nano-particle semiconductor material, and a light source that includes a blue light-emitting diode configured to generate a blue output light. The nano-particle semiconductor material is configured to receive the blue output light, convert a first portion of the blue output light to a green light emission, convert a second portion of the blue output light to a red light emission, and transmit a remainder portion of the blue output light. The liquid crystal module is configured to receive the green light emission, the red light emission, and the remainder portion of the blue output light and generate an image that includes a portion of the green light emission, a portion of the red light emission, and a portion of the remainder portion of the blue output light.

A head-up display system and display method, a vehicle, and a computer product. The head-up display system includes: a display device configured to output first linearly polarized light for displaying a first image in a first time intervals and output second linearly polarized lit ht for displaying, a second image in a second time intervals; and a polarization beam splitting element in an optical path of light exiting from the display device, being configured to deflect a propagation direction of the first linearly polarized light by a first angle and deflect a propagation direction of the second linearly polarized light by a second angle, and the first angle and the second angle are different from each other.

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.