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High-reliability white light LED plane light source module

A planar light source and white light technology, applied in the field of LED light source, can solve the problems of poor uniformity, glare, low brightness, etc., and achieve the effect of small thickness, good thermal conductivity and high uniformity

Inactive Publication Date: 2012-07-04
EAST CHINA NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, adopt a planar packaging process different from the traditional planar mounting and single metal bowl cup packaging process, and manufacture it in the metal substrate through automatic processing techniques such as laser engraving or wet and dry etching. The special groove structure creates a special installation environment for the chip, realizes the continuous manufacturing process of the planar light source, and combines the use of the astigmatism layer with the phosphor layer as the light-emitting layer to solve the glare and uniformity of the planar light source when it is used for lighting. Problems such as poor performance and low brightness

Method used

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  • High-reliability white light LED plane light source module
  • High-reliability white light LED plane light source module
  • High-reliability white light LED plane light source module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 2 As shown, the white LED planar light source module includes: an aluminum substrate 1, a patterned copper foil circuit layer 2 and an insulating layer 3 are arranged in the middle of the aluminum substrate, and the aluminum substrate is formed on the aluminum substrate by automatic processing techniques such as laser engraving or wet and dry etching. A special trapezoidal groove structure is manufactured on the surface to create a special installation environment for the chip and realize the continuous manufacturing process of the planar light source. The bottom of the trapezoidal groove 8 is directly equipped with the LED light-emitting chip 4, adjacent to the space between the two LED light-emitting chips 4 The pitch of the LED light-emitting chip 4 is 4 mm, the height of the LED light-emitting chip 4 is h=0.5 mm, and the width of the LED light-emitting chip 4 is 0.8 mm. The horizontal distance a of the center point of the LED light-emitting chip is 0...

Embodiment 2

[0028] Such as image 3 As shown, the white LED planar light source module includes: an aluminum substrate 1 with a patterned copper foil circuit layer 2 and an insulating layer 03 in the middle of the aluminum substrate, and an arc-shaped groove 8 on the upper surface of the aluminum substrate with a radius of 0.5mm , the distance between adjacent LED light-emitting chips 4 is 5 mm, the thickness of the LED light-emitting chips 4 is h=0.3 mm, the width of the LED light-emitting chips 4 is 0.4 mm, a is 0.25 mm, and the depth of the arc-shaped groove 8 is d=0.5 mm, for the emitted light angle β of the light on the surface of the LED light-emitting chip that is greater than 70 degrees, the emitted light angle after reflection can be reduced to within the range of 20-60°, so as to realize the concentrated output of light;

[0029] The LED light-emitting chip is connected to the patterned copper foil circuit layer 2 through the gold wire electrode 7, and the arc-shaped groove is f...

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Abstract

The invention relates to the technical field of LED light sources, in particular to a high-reliability white light LED plane light source module adopting a metal substrate with a special grooved structure. The high-reliability white light LED plane light source module is characterized in that the upper surface of the metal substrate is provided with a special grooved structure, and the metal substrate is internally provided with a graphic circuit layer and an insulating layer having high reflectivity; an LED light emitting chip is directly arranged in the groove of the metal substrate, and the groove is filled by adopting transparent resin or silica gel; the LED light emitting chip is covered to form a filling layer, and a light scattering layer and a fluorescent powder layer are sequentially arranged on the filling layer. Compared with the prior art, the invention adopts automatic machining processes such as a laser engraving or dry-wet engraving method, and the like to manufacture the special groove so as to build good mounting environment for the chip, and moreover, by adding the combined use of the scattering layer and a light emitting layer, a formed plane has small light source thickness, strong area expandability, high stability, high brightness and good uniformity. The LED chip is directly fixed on the metal substrate with the circuit layer, thus the heat-conducting property is good.

Description

[technical field] [0001] The invention relates to the technical field of LED light sources, in particular to a high-reliability white LED planar light source module using a metal substrate with a special groove structure. [Background technique] [0002] Since the radiation angle distribution of most LED light sources is a Lambert distribution of 110-120°, without light distribution, the light pattern irradiated on the surface of the object is a circular spot, which is prone to glare when the light intensity is high , uneven illumination and other issues. According to the standard of "Standard Illumination Body and Illumination Observation Conditions", the uniform illuminance of general lighting is required to reach 0.7 or more. In response to this requirement, the design of LED white light general lighting sources mainly includes the following three types: [0003] One is to combine and integrate high-brightness multiple LEDs in a specific design, as described in patents 20...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S2/00F21V7/10F21V7/22F21V23/00F21V5/00F21V5/08F21V9/10F21Y105/00F21Y101/02F21K9/20F21V9/40F21Y105/14F21Y115/10
Inventor 张哲娟孙卓孙鹏
Owner EAST CHINA NORMAL UNIV
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