A prismatic diaphragm for eliminating the condensing point of LED side lighting
A technology of LED light source and prism film, applied in lighting devices, lighting and heating equipment, semiconductor devices of light-emitting elements, etc. Effect
Active Publication Date: 2017-07-04
JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS
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Problems solved by technology
However, with the development of thinner and lighter liquid crystal displays, in the LED side lighting backlight module, the LED light source is getting closer to the side of the light guide plate, so there will still be a spot phenomenon at the position where the LED light source is adjacent to the light guide plate. Above-mentioned prior art still is powerless to this
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[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. Wherein, the same parts adopt the same reference numerals.
[0023] As mentioned in the background technology section, in order to solve the defect of the spot phenomenon of the LED light source adjacent to the light guide plate in the LED side-illuminated backlight module, the present invention provides an LED side-illuminated backlight module especially suitable for liquid crystal displays The prism film in the prism film is a prism film that can eliminate the focal point of the LED side lighting. In addition, the invention also provides a backlight module and a liquid crystal display using the prism film.
[0024] figure 1 Shown is a schematic diagram of the three-dimensional structure of a prism film 1 that eliminates the foca...
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Abstract
A prism diaphragm for eliminating side light spots of LEDs is attached to the side of a light guide plate; the side of the light guide plate is provided with an LED light source; the prism diaphragm comprises a PET (polyethylene terephthalate) base; the PET base is provided with a plurality of first prisms arranged in parallel; the LED light source is disposed along the length of the first prisms; the edge, adjacent to the LED light source, of the prism diaphragm is provided with at least one rectangular area; each rectangular area has a structure different from the first prisms. The invention further provides a backlight module having the prism diaphragm for backlight modules and a liquid crystal display. The edge of the prism diaphragm is provided with the rectangular areas different in structure; light from the LED light source can be scattered from the rectangular area A in a mode different from the first prisms; thus, chances of general light spots can be reduced, the light spots are improved and even eliminated, and the appearance of the liquid crystal display is finally improved.
Description
technical field [0001] The invention relates to an optical film that can be used in a liquid crystal display side lighting backlight module, in particular to a prism film that can eliminate LED (light emitting diode) side lighting condensing points. In addition, the invention also relates to a backlight module and a liquid crystal display using the prism film. Background technique [0002] In a liquid crystal display (Liquid Crystal Display, LCD) side-lit backlight module, usually a plurality of LED light sources are distributed in a linear arrangement on one or more sides of the light guide plate to provide illumination. Due to the luminous angle of the LED point light source itself and the distance between adjacent LEDs, there will be an alternate light and dark area near the frame of the display device where the light enters the screen, which is called a Hot Spot in the industry. [0003] At present, the method of eliminating the LED side lighting spot is mainly to incre...
Claims
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IPC IPC(8): G02F1/13357F21Y115/10
CPCG02B6/0053G02B6/0058
Inventor 吴培服
Owner JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS