Unlock instant, AI-driven research and patent intelligence for your innovation.

A large power LED using porous metal material as heat emission device

A technology of light emitting diodes and porous metals, applied in the field of lighting, can solve the problems of poor heat dissipation effect, accelerated light decay, increased cost, etc., and achieve the effect of obvious heat dissipation effect and increase of heat dissipation area.

Active Publication Date: 2008-11-12
浙江远图技术股份有限公司
View PDF10 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Usually, the high-power light-emitting diodes are welded on the flat aluminum substrate, and then fixed on the radiator with glue; Heat dissipation causes the temperature of the die to rise, and finally leads to a significant decrease in the life of high-power LEDs and accelerated light decay. At present, due to the inability to effectively dissipate heat, it is not only impossible to make single-chip high-power LEDs above 5 watts, but also for high-power LEDs above 10 watts. Power LED multi-die modules cannot be made larger
[0004] At present, due to the temperature rise of high-power light-emitting diodes during use, the power can only reach 3 watts, and the power of 3 watts requires a heat dissipation area of ​​​​more than 80 square centimeters. The effect of using grooves and fins to increase the heat dissipation area has been achieved. It is not large, and in the future, the module combination of high-power light-emitting diodes and multiple dies will reach 30-50 watts, and the area requirement is smaller. In 1 square centimeter, the power of tens of watts will be achieved, and the heat dissipation will put forward higher requirements; in addition, The existing high-power light-emitting diodes need to use a large amount of copper or aluminum materials, resulting in higher costs. These factors have seriously restricted the development of semiconductor lighting.
[0005] Porous metal materials are also called metal foams. They have high porosity and high through-porosity, and the porosity is as high as 90%. They are generally used in medical filtration and adsorption in chemical production; A report on heat dissipation applied to high-power light-emitting diodes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A large power LED using porous metal material as heat emission device
  • A large power LED using porous metal material as heat emission device
  • A large power LED using porous metal material as heat emission device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] like Figure 4 As shown, the high-power light-emitting diode 2 containing the aluminum substrate 3 is directly fixed by the porous metal material 1, and the part where the surface treatment layer 4 of the porous metal material is in contact with the high-power light-emitting diode 2 is treated for electrical conduction and heat conduction, and the surface treatment of the porous metal material The layer 4 is closely connected with the aluminum substrate 3 so that the heat of the high-power light-emitting diode 2 can be dissipated through the porous metal material 1 . The porous metal material 1 has a cup-shaped structure, and its inner peripheral surface is polished to form a surface reflective layer 11, so that the light emitted by the high-power light-emitting diode 2 is emitted through the surface reflective layer 11, and the cup mouth is connected with the textured glass 8 to make the light uniform Diverge.

Embodiment 2

[0028] like Figure 5Shown, use porous metal material 1 as the bottom of heat dissipation, adopt metal such as copper, aluminum or plastics to make outer metal encapsulation cup 9, but the bottom radiates heat through porous metal material. Add lens 7 in front and play light-gathering effect. The porous metal material 1 is fixed on the bottom of the metal packaging cup 9 as a heat sink, and the joint part is the surface treatment layer 4 of the porous metal material. Inside, the inner surface is a reflective layer 11, and a lens 7 is added on the top to gather light. It is fixed with the thermal pad 15 through the fixing hole 10 to dissipate heat.

Embodiment 3

[0030] like Image 6 As shown: the porous metal material 1 is used as the bottom and surroundings for heat dissipation, and the front is covered with textured glass 8 for astigmatism. The high-power light-emitting diode 2 is fixed on the aluminum substrate 3 , and the metal packaging cup 9 is fixed on the porous metal material 1 . In order to diverge the light, cloth glass 8 is used as the front end. Distribute light evenly. The porous metal material 1 is fixed on other metals through the fixing holes 10 , and the heat can also be dissipated through the cooling holes 14 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
porosityaaaaaaaaaa
Login to View More

Abstract

The disclosed large-power LED comprises porous metal material as radiation device, can not only adds heat dispersion area, but also saves much material for reducing cost.

Description

technical field [0001] The invention relates to the lighting field, in particular to a high-power light-emitting diode that directly uses porous metal materials (porous copper or porous aluminum) as a heat sink. Background technique [0002] After the semiconductor technology triggered the microelectronics revolution, it is gestating a new industrial revolution—the lighting revolution. Light-emitting diodes have become a shining symbol of the information age and will gradually replace traditional lighting technologies such as incandescent lamps and fluorescent lamps. Neon lights require high voltage and are easily damaged. It will be one of the greatest inventions of mankind after the invention of incandescent light bulbs. High-power light-emitting diodes are the most effective way to convert electrical energy into light energy. Its lifespan is more than 60,000 hours, and it saves electricity by at least 80% compared with traditional lamps. It has been recognized as a new g...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/00H01L23/373H01L23/367H01L23/36H01L33/64
CPCH01L2924/0002H01L2924/00
Inventor 何永祥沈颖玲李再林
Owner 浙江远图技术股份有限公司