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Thin direct-lighting type backlight module

A backlight module and direct-type technology, which is applied in the field of direct-type backlight modules, can solve the problem of low cost of side-light backlight modules and direct-type backlight modules, and achieve the effect of uniform surface light source

Inactive Publication Date: 2014-01-15
SHANGHAI XIANGLONG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing technology cannot have the advantages of thin thickness of the edge-type backlight module and the advantage of low cost of the direct-type backlight module, the present invention provides a thin direct-type backlight module to integrate the thin thickness of the edge-type backlight module. Advantages While having the advantages of low cost of the direct type backlight module, it can still provide a uniform surface light source

Method used

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  • Thin direct-lighting type backlight module
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  • Thin direct-lighting type backlight module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Cooperate with reference figure 1 , is a cross-sectional view of the thin direct type backlight module according to Embodiment 1 of the present invention. The thin direct-type backlight module 1 is used to provide the light source required for the display of a liquid crystal panel (not shown), and the thin-type direct-type backlight module 1 includes a light guide plate 3, a plurality of light-emitting diodes 5 and a plurality of optical film sheets 7 .

[0042] The light guide plate 3 is usually made of polymethylmethacrylate (Polymethylmethacrylate, PMMA) or polystyrene (Polystyrene, PS) with a uniform thickness and transparent rectangular structure, but the material of the light guide plate 3 is not Excluding the use of other resin materials with light-transmitting properties, such as: acrylic resin (Acrylic Resin), cycloolefin polymer (COC), polycarbonate (PC) or silicone (Silicone).

[0043] The light guide plate 3 includes a light incident bottom surface 320 , a...

Embodiment 2

[0052] Cooperate with reference Figure 4 , is a cross-sectional view of a thin direct-lit backlight module according to Embodiment 2 of the present invention. The thin direct-type backlight module is used to provide the light source required for the display of a liquid crystal panel (not shown), and the thin direct-type backlight module 1A includes a light guide plate 3, a plurality of light-emitting diodes 5, and a plurality of light-shielding dot blocks 8 And a diffusion sheet 9.

[0053] The light guide plate 3 is usually a light-transmitting rectangular structure with uniform thickness and made of polymethyl methacrylate (PMMA) or polystyrene (PS). The light guide plate 3 includes a light incident bottom surface 320 , a light exit top surface 322 and a plurality of light reflective structures 326 . The light emitting diode 5 is disposed on the light incident bottom surface 320 , and the light incident top surface 322 is opposite to the light incident bottom surface 320 ...

Embodiment 3

[0061] Cooperate with reference Figure 5 , is a cross-sectional view of a thin direct-lit backlight module according to Embodiment 3 of the invention. Figure 5 The thin direct-type backlight module 1B shown is similar to the thin-type direct-type backlight module 1 of Embodiment 1, and the same components are marked with the same symbols. It is worth noting that the differences between the two are: Figure 5 The side wall of the reflective structure 326B of the shown thin direct backlight module 1B is composed of a first line segment 3262B and a second line segment 3264B.

[0062] The first line segment 3262B is set above the second line segment 3264B, the slope of the first line segment 3262B is different from the slope of the second line segment 3264B, and in this embodiment, the slope of the first line segment 3262B is smaller than the slope of the second line segment 3264B . The angle formed between the two second line segments 3264B at the bottom of the light-reflect...

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Abstract

The invention discloses a thin direct-lighting type backlight module which comprises multiple light-emitting diodes, a light guiding plate and multiple optical thin film pieces. The light guiding plate comprises a light incidence bottom face, a light emergence top face and multiple light reflecting structures. The light-emitting diodes are arranged on the light incidence bottom face, and the light emergence top face is opposite to the light incidence bottom face. The multiple light reflecting structures are formed on the light emergence top face and are sunken towards the direction of the light incidence bottom face, and the light-emitting diodes are located under the light reflecting structures and correspond one by one. Each optical thin film piece is provided with multiple penetrating holes, and the optical thin film pieces are gradually and correspondingly arranged on the light reflecting structures. Each optical thin film piece is provided with a light shading layer, and the light shading layers adhere to the light guiding plate and face the corresponding light reflecting structures. The thin direct-lighting type backlight module has the advantages of small thickness of a side-light type backlight module and low cost of a direct-lighting type backlight module and can provide an even area light source.

Description

technical field [0001] The invention relates to a backlight module, in particular to a direct type backlight module. Background technique [0002] The backlight module of the traditional liquid crystal display is arranged on the back of the liquid crystal panel to provide the display light source required by the liquid crystal panel. Backlight modules can be divided into "side-lit" and "direct-lit" designs according to the position of the light source. The "direct-lit" design of the backlight module gradually uses multiple light-emitting diodes as light sources to replace traditional incandescent or fluorescent tubes. . When light-emitting diodes are used as light sources, they are usually reserved for a certain spreading distance, and then installed under the liquid crystal panel to provide a uniform light output from the liquid crystal panel, so the backlight module of the "direct type" design will be very thick. The structure of the "edge-lit" backlight module receives ...

Claims

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Application Information

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IPC IPC(8): F21S8/00F21V19/00F21V8/00F21V1/00F21Y101/02F21Y115/10
Inventor 叶钧皓
Owner SHANGHAI XIANGLONG ELECTRONICS TECH
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