A display apparatus includes a display panel displaying an image using light; a light source generating first light; a light conversion member converting the first light into the light; a case member accommodating the light source and the light conversion member and including an open part to transmit the light which is converted by the light conversion member; and a light guide plate receiving the light through the open part and guiding the light to a upward direction where the display panel is disposed.

A methacrylic resin composition containing 10 to 99 parts by mass of a methacrylic resin (A) containing 80% by mass or more of a methyl methacrylate unit, and 90 to 1 part by mass of a block copolymer (B) containing 10 to 60% by mass of a methacrylic acid ester polymer block (b1) and 90 to 40% by mass of an acrylic acid ester polymer block (b2), where the total of the methacrylic resin (A) and the block copolymer (B) is 100 parts by mass, where a weight-average molecular weight Mw.sub.(A) of the methacrylic resin (A), a maximum weight-average molecular weight Mw.sub.(b1) of the methacrylic acid ester polymer block (b1) and a maximum weight-average molecular weight Mw.sub.(b2) of the acrylic acid ester polymer block (b2) satisfy (1): 0.5≦Mw.sub.(A)/Mw.sub.(b1)≦2.5 and (2): 40000≦Mw.sub.(b2)≦120000.

The embodiments of the present invention disclose a backlight module, a liquid crystal panel and a display device. The backlight module comprises: a light guide plate (5), a plurality of polarization-maintaining optical fibers (3) and a plurality of monochrome laser light sources (1) provided at a lateral portion of the light guide plate (5). The polarization-maintaining optical fibers (3) receive the monochromatic light emitted from the monochrome laser light sources (1) respectively, and transmit the monochromatic light into the light guide plate (5).

A liquid crystal display device, includes a cover glass; a liquid crystal display module disposed below the cover glass; and a backlight module disposed below the liquid crystal display module and including a light emitting source, a light guide plate, a reflector sheet, a diffuser film, a prism film, a dual brightness enhancement film, and a plastic frame. Both sides of the liquid crystal display module between the cover glass and a top surface of the plastic frame and a partial area of the top surface of the plastic frame are coated with an opaque plastic adhesive.

Disclosed are a self-illuminating light guide plate, a backlight module, and a display device. The self-illuminating light guide plate includes a substrate including at least one light incidence face provided with a white light emitting layer. The light incidence face of the substrate is provided with a white light emitting layer, so the self-illuminating light guide plate for a backlight module can act as light sources, as compared with the prior art where the LED BAR acts as light sources, the disclosure can avoid pictures of the backlight module from becoming poor due to errors in assembling the LED BAR, and further improve quality of pictures on a display device; and light emitted by the white light emitting layer can vary with shape of the substrate, so a display device with curved display surface to which the self-illuminating light guide plate is applied has a promising prospective.

A button module includes an operating member, a circuit board having a pattern for detecting touch operations on the operating member, a button arranged on the circuit board, and a light guiding component further including a front side, a back side opposite to the front side, a housing defined between the front and back sides, a recess defined in the back side for hosting a light source, a through hole extending through the front side and connecting the housing to the external space, and an optical path from an inner surface of the recess to the front side. The operating member, the circuit board and the button are located in the housing with the operating member at least partially hosted in the through hole and the button abutting the light guiding component. Light from the light source located in the recess extends along the optical path to the front side.

A light delivery system and method are provided to promote a photochemical reaction for disinfecting a surface. The system includes a light source and a light diffusing element operatively coupled to the light source and further embedded within a surface to be disinfected. The light diffusing element outputs light to the surface to promote a photochemical reaction to disinfect the surface. A low scatter light transmission medium may further be coupled between the light source and the light diffusing element to transmit light from the light source remotely to the light diffusing element.

The semiconductor laser device includes a base member having a recess that opens upward, a semiconductor laser element disposed on a bottom surface of the recess, and a light reflecting member being disposed forward of a light emitting surface of the semiconductor laser element and including a light reflecting surface to reflect laser light emitted from the semiconductor laser element. The semiconductor laser element and the light reflecting member are arranged such that a direction of an optical axis of light that is reflected by the light reflecting member is different from a direction that is perpendicular to a lower surface of the base member.

A plane illumination apparatus has an optical device, an irradiation unit, and a light guide plate. The irradiation unit makes the coherent light beams scan the surface of the optical device, the light guide plate comprises a light take-out portion to take out coherent light beams to outside while making coherent light beams propagate between a first end face on which coherent light beams from the optical device are incident and a second end face provided to face the first end face, the specific zone is provided inside the light take-out portion or along the first end face, or along the second end face, the light take-out surface is a third end face that is connected to the first and second end faces, and the irradiation unit is provided at a rear side of a fourth end face that is an opposite side to the light take-out surface.

A directional backlight may include a light guiding apparatus including at least one transparent optical waveguide for providing large area collimated illumination from localized light sources. The waveguide is arranged in a first part and a second part with a light injection aperture between the respective parts. Such controlled illumination may provide for efficient, multi-user autostereoscopic displays as well as improved 2D display functionality including high brightness displays and high display efficiency.