White Light-emitting diode

A technology of light-emitting diodes and white light, which is applied in the direction of electrical components, electric solid-state devices, circuits, etc., can solve problems such as the lifespan of white light-emitting diodes is not long enough, there is no obvious reduction in the light decay of white light-emitting diodes, and the application of white-light light-emitting diodes is limited. The effect of improving lifespan and reducing light decay rate

Inactive Publication Date: 2009-04-08
NINGBO ANDY OPTOELECTRONIC CO LTD
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0004] However, at present, the above-mentioned various measures basically do not significantly reduce the light decay of white light emitting diodes, and the actual life of white light emitting diodes is still not long enough, which largely limits the application of white light emitting diodes in the field of lighting

Method used

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Embodiment Construction

[0022] The white light emitting diode disclosed by the present invention includes a bracket, a light emitting diode grain, a powder mixing glue and a fluorescent powder, the light emitting diode crystal grain is fixed on the bracket, the phosphor powder and the powder mixing glue are prepared in proportion, the powder mixing The glue is prepared by proportioning polydimethylsilicone and curing agent for LED encapsulation.

[0023] In this embodiment, the chip selects the light-emitting diode crystal grains with a blue light emission wavelength of 455-465nm, an insulating glue for the crystal-bonding glue (of course, silver paste can also be used), and the phosphor powder adopts silicate phosphor produced by Intematix Corporation of the United States. powder (of course, it can also be YAG yttrium aluminum garnet phosphor, TAG terbium aluminum garnet phosphor or sulfide phosphor, etc.), the LED bracket adopts iron bracket (of course, copper bracket can also be used), and the powd...

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Abstract

This invention discloses a white light LED including a frame, grains of the LED, glue for preparing powder and fluorescent powder, in which, said grains are fixed on the frame, said fluorescent powder is matched with the glue for preparing powder in proportion, and the glue is prepared by polydimethyl silicon ketone and solidifying agent in proportion, which can reduce light attenuation rate of white light LED, when applying standard 20mA current drive, the luminous flux of a LED at 168 hours increases 4%, and remains the same rising rate at 336 hours and attenuation does not appear at 1000 hours but 3% rising instead so as to prolong life time of white light LED greatly.

Description

【Technical field】 [0001] The invention relates to a light-emitting diode, more specifically, to a white light-emitting diode. 【Background technique】 [0002] Light-emitting diode is a semiconductor light-emitting device, which is widely used as indicator lights, display screens, etc. White light-emitting diodes are known as the fourth-generation lighting source to replace fluorescent lamps and incandescent lamps. The theoretical lifespan of light-emitting diodes is about 100,000 hours. However, judging from the current white light-emitting diodes on the market, their lifespan is far from the theoretical 100,000 hours. Generally, at 1,000 hours, the light decay rate has reached more than 30%. , thus shortening the life of white light emitting diode products to a large extent. [0003] Packaging materials are one of the main factors that affect the light decay of white light emitting diodes. At present, conventional packaging materials for light emitting diodes mainly includ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/00H01L23/29H01L33/56
Inventor 占贤武
Owner NINGBO ANDY OPTOELECTRONIC CO LTD
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