CN203147400U

CN203147400U - Small-sized LED backlight plate

Info

Publication number: CN203147400U
Application number: CN2013201257269U
Authority: CN
Inventors: 周剑平
Original assignee: SHENZHEN PINGYANG ELECTRONICS CO Ltd
Current assignee: SHENZHEN PINGYANG ELECTRONICS CO Ltd
Priority date: 2013-03-19
Filing date: 2013-03-19
Publication date: 2013-08-21
Anticipated expiration: 2023-03-19

Abstract

The utility model discloses a small-sized LED backlight plate. The small-sized LED backlight plate comprises a framework, wherein the lateral edges on the periphery of the framework are respectively provided with a set of strip-shaped circuit boards, a plurality of LEDs are welded on each set of strip-shaped circuit boards, a light guiding plate is installed above the bottom of the framework, the lower surface of the light guiding plate is a reflector plate facing the LEDs, the upper surface of the light guiding plate is an diffusion plate, and a polarizing film is installed above the light guiding plate. The small-sized LED backlight plate has the advantages that the overall brightness is improved to the maximum degree within a limited area.

Description

The compact LED backlight

Technical field

The utility model relates to backlight, belongs to the display element technical field.

Background technology

At present, middle-size and small-size LED-backlit plate manufacture commonly used is side-light type, the side light type LED back light plate uses the LED light emitting array, the light source that LED is sent is by sending around the backlight, by optical principle and utilize LGP that light is directed into LED-backlit plate central authorities by the outside, make the LED-backlit slab integral can send light uniformly.

Yet present existing compact LED backlight all is to use single one group of LED, and it is not enough to make that the LED-backlit plate causes the intensity of light source to distribute, and whole lighting efficiency descends.

Summary of the invention

At the defective of prior art, the utility model discloses a kind of compact LED backlight, lighting source is evenly distributed, the luminous efficiency height.

For achieving the above object, the utility model is achieved through the following technical solutions:

The compact LED backlight, comprise framework, be separately installed with one group of strip circuit plate on the side around the base of frame, be welded with a plurality of LED on every group of strip circuit plate, the base of frame top is equipped with LGP, the lower surface of LGP is reflector plate, and towards the LED direction, the upper surface of LGP is diffusion sheet; Light polarizing film is installed above LGP.

By said structure, the light that sends from the LED on four groups of strip circuit plates of four sides enters LGP, along the LGP plane guidance; The light that overflow to loose from the LGP sheet reflection that is reflected, thereby the top projection to LGP, because diffusion sheet is above LGP, diffusion sheet receives the light from LGP, and spread simultaneously when each light passed diffusion sheet, integral body reaches all effects of light, because original light sends symmetrically, therefore this structural entity uniformity of luminance is very desirable.

Wherein used light polarizing film is used for the mode of light electromagnetism vector polarisation is reached the purpose of blast, has improved luminous efficiency.

In order not influence the thickness of entire backlight plate, preferred described light polarizing film thickness is 0.05-0.25mm.

By above-mentioned improvement, backlight of the present utility model is injected owing to all having light all around in the bottom, and integrated light source can effectively strengthen, and is luminous even, on the whole the directionality unanimity of light.

Description of drawings

Fig. 1 is the utility model LED-backlit plate portion STRUCTURE DECOMPOSITION figure;

Fig. 2 is the utility model LED-backlit plate framework polycrystalline substance schematic diagram.

The specific embodiment

With reference to figure 1,2, LED-backlit plate of the present utility model, comprise framework 10, side around the base of frame is for the strip circuit plate 11 that four groups of same sizes are installed, it is not shown to be welded with a plurality of LED(on every group of strip circuit plate), the base of frame top is equipped with LGP 20, and the lower surface of LGP is reflector plate 30, towards the LED direction, the upper surface of LGP is diffusion sheet 40; Light polarizing film 50 is installed above LGP.

In the accompanying drawings, the support and connection structure of not shown each several part, normally each layer is bonded together.

In use, liquid crystal panel is installed on the light polarizing film top, makes the light of LED backboard enter liquid crystal panel, reach needed light efficiency.

Claims

1. compact LED backlight, it is characterized in that comprising framework, be separately installed with one group of strip circuit plate on the side around the base of frame, be welded with a plurality of LED on every group of strip circuit plate, the base of frame top is equipped with LGP, the lower surface of LGP is reflector plate, and towards the LED direction, the upper surface of LGP is diffusion sheet; Light polarizing film is installed above LGP.

2. LED-backlit plate according to claim 1 is characterized in that described light polarizing film thickness is 0.05-0.25mm.