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Flat light source module

A planar light source and optical surface technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of reducing the efficiency of light use, and achieve the effect of uniform distribution, good light utilization rate, and clear images

Active Publication Date: 2008-12-24
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structural layer diaphragm used in this structure is a simple prismatic structure. Although the use of a prismatic structure can concentrate the light and reduce the angle, it is easy to cause total reflection of the light with a small angle, thus reducing the use efficiency of light.

Method used

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Embodiment Construction

[0057] The technical features and effects of the present invention will be described in detail below with reference to the accompanying drawings. However, the attached drawings and the examples are only for auxiliary description, so as to facilitate a deep understanding of the essence of the present invention, and are not intended to limit the present invention.

[0058] see Figure 3A , the prism structure has good light-collecting characteristics in optical effect (reducing the divergence angle of the divergent light source); according to Snell's Law (Snell's Law), when the incident light 32 enters the prism 30, if the angle θ is greater than the critical angle of total reflection, Then the incident light 32 will be totally reflected in the prism 30 ( Figure 3A middle dotted arrow), if the angle θ is less than the critical angle of total reflection, then the incident light 32 will exit the prism 30 ( Figure 3A The solid arrow in the middle) will deviate from the normal a...

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Abstract

The invention relates to a plane light source module, which comprises a compound optical membrane and a light resource, wherein said membrane has first optical surface and second optical surface for receiving one incident light; said light resource has surface lighting state and faces said second optical surface; the membrane has one disperse part and one collecting part; the disperse part is made from transparent material to disperse the incident light; the collecting part is made from transparent material to collect the incident light; said disperse part and collecting part are contacted parallel at the first optical surface.

Description

technical field [0001] The invention relates to a planar light source module, in particular to a planar light source module equipped with a composite optical film, wherein the composite optical film arranges a diffusion component and a light collection component in the same film layer. Background technique [0002] In today's society, liquid crystal displays have been widely used in personal computers and various image display products thereof. Since this type of display is a passive image display, a plane light source must be added behind it to make the image on the liquid crystal panel appear clearly. In order to achieve this purpose, the light of the planar light source must have a certain degree of divergence and uniform brightness. [0003] It can be seen from the above that in the backlight module, the two most important parts are the light source and the optical film group placed on the light source. Planar light sources include small molecule organic light emitting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1335
Inventor 姚柏宏鲍友南黄珩春潘奕凯孙翊庭
Owner IND TECH RES INST