38results about How to "Uniform outgoing light" patented technology

The invention relates to an LED (Light Emitting Diode) illumination device comprising a light source substrate, a plurality of LED light sources, a light guide plate and a lampshade. The plurality of LED light sources are fixed on the light source substrate; the light guide plate is arranged inside the lampshade; a light-incident surface is formed at one end of the light guide plate and is arranged opposite to the LED light source; the light guide plate comprises two lateral surfaces both of which are reflection surfaces and respectively form a first curved surface and a second curved surface; and a plurality of projected or recessed dimming grains are arranged on at least one lateral surface of the light guide plate. Emergent lights of the LED light source entering from the light-incident surface are reflected and transmitted between two lateral surfaces of the light guide plate and are irradiated on the dimming grains to generate diffusion for light emergence; light beams emitting from the lateral surface of the light guide plate are irradiated on the inner surface of the lampshade and are finally emitted to outside through the lampshade. The invention can obtain even emergent lights through the light guide plate, improves the direct glaring effect of the LED light source and ensures that the LED illumination device has favorable irradiation angle.

The invention is a guide device, which is annular structure; it includes a top surface, a bottom surface relative to the top surface, an inner side surface and an external surface correspondent to the internal one. Parts of the external surface or the whole surface are the light incidence surface; the internal side surface is the emergent face.

The invention is a light guide plate, comprising a light incident surface, a light outgoing surface adjacent to the light incident surface and a bottom surface opposite to the light outgoing surface, where the bottom surface comprises a plurality of arc grooves and the light outgoing surface also comprises a plurality of grooves.

The invention discloses a fluorescent ceramic and sapphire compound ceramic material and a preparation method thereof. The compound ceramic material comprises a fluorescent ceramic layer, a sapphire layer and a connecting layer, wherein the connecting layer is composed of non-continuous fluorescent particles obtained by dispersing glass and have components the same as that of the fluorescent ceramic layer. The connecting layer is used for connecting the fluorescent ceramic layer and the sapphire layer, and the layers are sintered at high temperature to obtain the compound ceramic material; theresponse wavelength of the fluorescent ceramic layer is 445 to 465nm; the connecting layer has a scattering effect on an excitation light source; the sapphire layer has high heat conductivity and hasa heat dissipation effect. According to the fluorescent ceramic and sapphire compound ceramic material, sapphire and fluorescent ceramic are used for constructing a compound structure, so that the heat conduction of the fluorescent ceramic is enhanced and a laser damage threshold value of the ceramic is improved; fluorescent powder has the effect of connecting the fluorescent ceramic and the sapphire, has a fluorescent property and is used for enhancing the luminescence; meanwhile, the scattering of the excitation light source is enhanced. The fluorescent ceramic and sapphire compound ceramicmaterial and the preparation method thereof have the advantages that a preparation technology is simple and the fluorescent ceramic and sapphire compound ceramic material is especially suitable for large-power and high-power-density laser illumination and display devices and other compact type devices.

The present invention relates to a backlight module and a LCD. The backlight module comprises a light guide plate. The light guide plate comprises a main body and an extension part formed by extending one end of the main body in the direction far away from the main body. The main body comprises a first side face parallel to the extension direction of the extension part; the extension part has a convex lug extend outwards from a horizontal plane where the first side face of the main body is arranged; the convex lug comprises a light entrance plane which is positioned at the adjacency part of the extension part and the main body; the extension part comprises at least one side face on which a reflection structure is arranged. The main body also comprises at least one light emitting diode arranged on one side of the light entrance plane, wherein, emergent light beams of the light emitting diode are radiated into the extension part from the light entrance plane, and are reflected by the side face provided with the reflection structure to form divergent light beams and enter the main body. The backlight module and the LCD are uniform in brightness.

The invention provides a bluelight LD multi-tooth reflective transmitting backlight module, structure wherein the outer side of a multi-tooth light reflecting system is tooth-shaped and furthermore a total-reflection film layer is plated on a non-light-emitting surface for reflecting light. When the light which is transmitted from a blue-light LD passes through the multi-tooth light reflecting system, the light is reflected to the tooth-shaped surface, thereby making the light be emitted out of the opposite surface of the tooth-shaped surface of the multi-tooth light reflecting system. A transparent jelly which is mixed with a red phosphor powder and a green phosphor powder is uniformly plated on the opposite surface, therefore the light activates the phosphor powders on the opposite surface in emitting out of the opposite surface and white light is obtained through mixing and output. The output white light enters a back board, and horizontally incident light is vertically output uniformly under the specific effect of a light guide board in the back board. Furthermore a purpose of back board illumination is realized. The bluelight LD multi-tooth reflective transmitting backlight module has advantages of simple structure, small size, small weight, compact structure, low equipment investment, simple production process and high product yield rate.