A backlight includes a substrate, a plurality of light sources, a reflective layer, a light guide plate, a pattern of light extractors, a plurality of patterned reflectors, and a diffusive layer. The plurality of light sources are proximate the substrate. The reflective layer is on the substrate. The light guide plate is proximate the plurality of light sources. The pattern of light extractors is on the light guide plate. The plurality of patterned reflectors are on the light guide plate. Each patterned reflector is aligned with a corresponding light source. The diffusive layer is on the light guide plate.

An anti-reflective film-attached transparent substrate includes: a transparent substrate including two major surfaces; and a diffusion layer and an anti-reflective film on one major surface of the transparent substrate, which are provided in this order. (A) A luminous reflectance SCI Y of an outermost surface of the anti-reflective film-attached transparent substrate is 1% or lower. (B) The anti-reflective film has a lamination structure in which at least two dielectric layers having different refractive indices are laminated. (C) A ratio (SCE Y)/(SCI Y) of a diffuse reflectance SCE Y of the outermost surface of the anti-reflective film-attached transparent substrate to the luminous reflectance SCI Y of the outermost surface of the anti-reflective film-attached transparent substrate is 0.15 or higher.

A optical apparatus to display an image to a user is disclosed. The apparatus comprises an image source to generate an image bearing light beam having a first numerical aperture; and a diffuser screen. The diffuser screen is configured to increase the numerical aperture of the image bearing light beam to a second numerical aperture. The diffuser screen comprises a first part comprising: a first face and second face substantially parallel to each other, a first array of a plurality of waveguides forming an optical path between the first face and the second face. A value of an optical property of each of the plurality of waveguides is selected randomly from a set of values of the optical property. The first array of a plurality of waveguides is arranged such that each of the plurality of waveguides has an optical axis that is substantially parallel to it's nearest neighbour. Substantially all the waveguides of the first array are sized below a size that would allow a single mode of visible light to propagate along each waveguide

A display device comprises a plurality of light sources, a luminance equalizer sheet and a display. The light sources include a plurality of first light sources arranged in an array on an arrangement region and a plurality of second light sources arranged at corner portions of the arrangement region, respectively. The luminance equalizer sheet is arranged opposite the light sources to equalize luminance, the luminance equalizer sheet including first portions that face the first light sources, respectively, and second portions that face the second light sources, respectively, the second portions being different from the first portions. The display is arranged opposite the luminance equalizer sheet and disposed on an opposite side of the luminance equalizer sheet relative to the light sources. The second portions of the luminance equalizer sheet form corner low transmittance areas with lower light transmittance than a portion of the luminance equalizer sheet other than the first portions and the second portions.

The invention relates to electronic engineering, more specifically to displays on a car windshield, even more specifically to projection IA qui d crystal displays with biologically adequate backlighting based on semiconductor light-emitting diodes (LEDs) for displaying augmented reality images on a car windshield. The display on the windshield of a car includes LED backlighting arranged in series along the optical axis, Consisting of at least one LED with a peak blue radiation wavelength of 475-490 nm, an optical film system including diffusely scattering and raster prismatic films designed to ensure uniformity illumination radiation, and a composite (zoned) composite photoluminescent film containing photoluminescent substances in a transparent base for converting blue LED radiation into green-blue radiation for the augmented reality display area and red radiation for the warning information display area, monochrome liquid crystal display, a Fresnel lens that magnifies the image formed on the liquid crystal display into the space in front of the windshield of the vehicle. The technical result consists in reducing the harmful effects of display radiation on the body of the driver and passengers of the car, simplifying the design, increasing the reliability and efficiency of the display on the windshield of the car.

A laminate used under an environment irradiated with external light includes a light diffusion control film having an internal structure in the film. The internal structure includes a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index. The laminate further includes an ultraviolet absorbing layer located further on the external light incident side than the light diffusion control film. The light diffusion control film has an indentation elastic modulus of 30 MPa or more as measured at a maximum load of 2 mN by a nanoindentation method.

An active glazing system (100) includes a double glazing, with two transparent plates (1a, 1b) that together delimit an intermediate volume (2) filled with gas. The system further includes a control device (10) that is capable of producing a transition in a volatile compound present in the intermediate volume, between a dry vapor state and a supersaturated vapor state of the volatile compound. Switching processes can therefore be controlled for the double glazing, between a transparent optical state and a diffusing optical state. Such a system can be used as building or vehicle glazing, an interior partition arrangement, a projection screen, a solar diffuser, a light source diffuser, a vision blurring device, etc.

A lighting device for vehicles having a laser light source and an optical unit which is associated with the laser light source and which generates a predetermined light distribution. A diffusion element is arranged between the laser light source and the optical unit for reducing and/or preventing a speckle pattern in the light distribution.

The present disclosure provides a display panel, including: a reflector; a phase retarder configured to change a polarization direction of a light beam passing through the phase retarder; a light-absorbing black matrix configured to absorb the light beam; and a polarization scattering film. After passing through the polarization scattering film, a polarized light beam from a projector is transmitted along an original light path, then the polarized light beam is transmitted through the phase retarder, reflected by the reflector and directed again to the polarization scattering film so as to be scattered. After passing through the polarization scattering film, a light beam with a polarization direction different from the polarized light beam from the projector is scattered by the polarization scattering film and then absorbed by the light-absorbing black matrix.

A method of manufacturing a part with an anti-counterfeit feature is provided. The method includes providing a part to be marked for anti-counterfeiting. The part is provided with a radiation impacting feature on or within the part. The radiation impacting feature is configured to at least one of (i) prevent accurate imaging of at least a portion of the part and (ii) provide unique authentication of the part.