An optical element comprises a light transmitting substrate (100), the light transmitting substrate comprises a first surface, and the first surface is provided with a plurality of strip-shaped prisms (200) which are arranged parallel to each other along a predetermined direction and extend along another predetermined direction. In the direction along which the plurality of strip-shaped prisms are arranged, a side of each strip-shaped prism close to a center of the light transmitting substrate has a refractive surface (201); from an end of the refracting surface close to the center of the light transmitting substrate to another end of the refracting surface close to an edge of the light transmitting substrate, the refracting surface inclines gradually along a direction away from the first surface. From the strip-shaped prism nearest to the center of the light transmitting substrate to the strip-shaped prism farthest to the center of the light transmitting substrate, an angle between the refracting surface and a normal of the first surface is gradually increased. A light guide plate (10), a prism (20), a backlight module and a display device are further provided.

An optical waveguide includes a textured light-diffracting layer. The optical waveguide is made from a poly(aliphatic ester)-polycarbonate copolymer having very high flow properties and good impact properties. A method of manufacturing the waveguide by injection molding, a method of incorporating a microprism structure and a method of scattering light by directing light through a light-scattering layer thereby produced on the waveguide are also disclosed.

A light guide plate and a light source module are described. The light guide plate includes a main body, first stripe microstructures and second stripe microstructures. The main body includes a light incidence surface, a light-emitting surface and a light reflective surface opposite to the light-emitting surface. The light incidence surface is connected between the light-emitting surface and the light reflective surface. The light-emitting surface includes a first microstructure region and a second microstructure region arranged sequentially, and the first microstructure region is near the light incidence surface. The first stripe microstructures are disposed in the first microstructure region and extending along a direction from one side near the light incidence surface to the other side away from the light incidence surface. The second stripe microstructures are disposed in the second microstructure region along the direction. A gradient of each second stripe microstructure is gradually varied along the direction.

An electronic device may have a display mounted in a housing. The display may have a pixel array that produces images. A display cover layer may overlap the pixel array. The display cover layer may have a planar central area surrounded by a peripheral edge area with a curved cross-sectional profile. From an on-axis viewing angle, an image on the pixel array is fully viewable through the planar central area and the peripheral edge area. From an off-axis viewing angle, the image is partly viewable through the peripheral edge area and not through the central area. To avoid an undesired color cast in the partly viewable image seen through the peripheral edge area of the display cover layer, the display may be provided with color cast compensation structures such as a guest-host liquid crystal layer that exhibits an anisotropic colored light absorption characteristic, a diffuser layer, and/or other optical structures.

The present disclosure relates to a light bar adhesive tape for a backlight source, including: a transparent bonding material layer configured to be bonded to a surface of a light bar flexible circuit board; a black and white flexible coating layer having a black surface on one side and a white surface on the other side, the white surface of the black and white flexible coating layer being bonded with the transparent bonding material layer; and a black and white bonding material layer having a black surface on one side and a white surface on the other side, the black surface of the black and white bonding material layer being bonded with the black surface of the black and white flexible coating layer. The present disclosure also relates to a backlight module including the light bar adhesive tape as above described and a display device including the backlight module.

A luminaire is provided. A main surface of a light-guiding panel included in the luminaire includes a reflecting area having a plurality of approximately conical recesses. An angle θ formed by a lateral surface of each of the recesses and the main surface of the light-guiding panel satisfies a condition defined by a distance D from a center position of a light source to a center position of the reflecting area, a distance H from an illumination target surface to the center position of the light source, an angle γ which the light-guiding panel forms with a horizontal plane, a refractive index n of the light-guiding panel, and a surface roughness R.sub.a of the lateral surface of each of the recesses.

The present invention provides a light-guiding plate which is applicable to incident rays over a wide ray angular range and wide wavelength rage, and is able to suppress a decrease in optical efficiency. A light-guiding plate 200 having a light diffracting portion 1200 for diffracting incident light by a multiple-recorded hologram is configured such that, in the light diffracting portion, when light 1210 of a single wavelength having a certain angular range is incident, at least two or more outgoing rays 1220 are discretely emitted with a first angular space θs, and the emitted rays each have a second angular range θa, and the first angular space θs is equal to or larger than the second angular range θa.

A diffusive reflector for a lighting apparatus comprising a backing part upon a surface of which is disposed an interface part(s) wherein the interface part(s) is at least partially diffusively reflective optically and/or the backing part is diffusively reflective optically. The interface part(s) is formed with a plurality of separate protrusions each adapted for making a separate respective contact interface with a surface of a light guide panel of the lighting apparatus to optically couple the backing part to the light guide panel via the interface part(s). The interface part(s) comprises an optically transmissive interface material arranged to form said contact interface such that the interfacial energy thereof is reduced so that air is driven from the contact interface. Consequently, the critical angle for total internal reflection of light guided by the light guide panel is increased at said contact interface.

The invention provides a liquid crystal display panel and a liquid crystal display device. The liquid crystal display device includes a liquid crystal display panel and an edge-lit backlight module. The liquid crystal display panel includes multiple pixel units arranged in an array and having equal areas. Each pixel unit includes sequentially arranged red sub-pixel, green sub-pixel and blue sub-pixel. Transmittances of blue light of the blue sub-pixels of the pixel units are gradually increased along a direction away from a side-type backlight source of the edge-lit backlight module. Therefore, the invention can increase transmittances of blue light of the blue sub-pixels, compensate the influence of color shift caused by blue light being absorbed in the backlight module and reduce color difference of the liquid crystal display panel.

A transparent illumination system and related light guide plate is provided. The system is configured to facilitate total internal reflection propagation of light through the light guide plate despite low index of refraction differences between the glass material of the light guide layer and the adjacent layer. The system includes a light source, such as a laser diode, and an optical element to fan out light from the light source in the plane of the light guide plate. The light guide plate includes internal light extraction features.