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Power Type Light Emitting Diode Using Phosphor Powder Thermal Conduction Structure

A technology of light-emitting diodes and phosphors, which is applied in the direction of semiconductor devices, electrical components, and electric solid devices, etc., can solve the problems of lowering the temperature of phosphors, achieve the effects of reducing the overall operating temperature, avoiding color shift, and ensuring service life

Inactive Publication Date: 2011-11-30
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are N100411210C, US20040223315A1, KR2004044701-A and other patents for the separation technology of LED phosphor powder and chip. Although these technologies have certain innovations, they do not reduce the temperature of the phosphor powder itself. temperature, in order to reduce the working temperature of the LED and realize the low thermal resistance of the power LED

Method used

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  • Power Type Light Emitting Diode Using Phosphor Powder Thermal Conduction Structure
  • Power Type Light Emitting Diode Using Phosphor Powder Thermal Conduction Structure
  • Power Type Light Emitting Diode Using Phosphor Powder Thermal Conduction Structure

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Embodiment Construction

[0019] Such as Figure 1 to Figure 4 For the power LED structure shown, the LED manufacturing steps are as follows: the heat sink 5 is bonded to the ring-shaped ceramic sheet 6 with heat-conducting adhesive, the phosphor powder heat sink 7 is bonded to the ring-shaped ceramic sheet 6, and the positive electrode 3 is made of a flexible PCB. and the negative electrode 4, and the two electrodes are insulated and bonded to the phosphor heat sink 7, the LED chip 1 is bonded to the heat sink 5, and the positive electrode and the negative electrode are respectively welded to the LED chip 1 with gold wires to form electrodes welding wire 21 and electrode welding wire 22, and then install the optical lens 11. according to Figure 5 and Figure 6 The shape design mold of the optical lens 11 shown is made of silica gel or polymethyl methacrylate (PMMA) material, heated to above 200°C, and the heated material is injected into the mold by injection molding or extrusion, and pressed into ...

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Abstract

The invention discloses a power type light emitting diode adopting a fluorescent powder heat-conducting structure. An LED chip is bonded above a central area of ​​a heat sink, a ring-shaped ceramic sheet is adhered above the edge area of ​​the heat-sink through a heat-conducting glue, and a ring-shaped ceramic sheet is bonded on the top of the edge area of ​​the heat sink. The phosphor heat sink is adhered to the chip, and the positive and negative electrodes made of flexible PCB are insulated and bonded to the phosphor heat sink. Both the positive electrode and the negative electrode are connected to the LED chip through welding wires. Optical lens, the light emitted by the LED chip is emitted through the optical lens, and it is characterized in that: the optical lens includes a lens layer, one side of the lens layer is coated with a phosphor layer, and the other side of the phosphor layer is provided with a heat transfer coating, which is used for heat transfer. The coating extends to the bottom of the optical lens. The invention can reduce the temperature of the phosphor to a lower temperature, ensure the service life of the phosphor, avoid the color shift problem of the phosphor when working at high temperature, and also reduce the overall working temperature of the LED.

Description

technical field [0001] The invention belongs to the field of photoelectric materials and devices, and in particular relates to a power-type light-emitting diode adopting a fluorescent powder heat-conducting structure. Background technique [0002] Power-type light-emitting diodes (LEDs) usually refer to LEDs with a power of more than 0.5W. The manufacturing technology is becoming more and more mature, and there are already a large number of patented technologies at home and abroad. LED products have been widely used and have achieved huge market benefits. At present, there are some technical bottlenecks in the process of using LEDs: (1) The phosphor will turn yellow when used for a long time, which will cause the color temperature of the LED to change; (2) The operating temperature of the phosphor is high and its service life is short; (3) The LED junction temperature is too high, Lead to short service life of LED; (4) LED operating temperature is high, resulting in redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/64H01L33/50H01L33/00
CPCH01L2224/45144H01L2224/48091H01L2924/00014H01L2924/00
Inventor 郭志友孙慧卿黄红勇严卫聪赵洪涛
Owner SOUTH CHINA NORMAL UNIVERSITY