Method for preparing white light LED utilizing YAG transparent ceramic

A technology of transparent ceramics and LED chips, which is applied to optical components, lighting and heating equipment, and components of lighting devices for changing the spectral characteristics of emitted light, can solve the problem of occupying large precious metals, complicated processes and high production costs. and other problems, to achieve the effect of low cost, simple process operation and long service life

Inactive Publication Date: 2009-01-07
SHANDONG INSPUR HUAGUANG OPTOELECTRONICS
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  • Claims
  • Application Information

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Problems solved by technology

However, since the preparation of large-sized YAG single crystal requires special equipment and complicated processes, and takes up a large amount of precious metals, the production cost has been high.

Method used

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  • Method for preparing white light LED utilizing YAG transparent ceramic
  • Method for preparing white light LED utilizing YAG transparent ceramic
  • Method for preparing white light LED utilizing YAG transparent ceramic

Examples

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Embodiment Construction

[0024] The present invention utilizes YAG transparent ceramics to prepare the method of white light LED is that the light of blue light or ultraviolet LED light-emitting chip absorbs part of the light of the light-emitting chip when passing through the YAG transparent ceramic material and converts it into light with a wavelength different from that of the light-emitting chip, and the light of different wavelengths is mixed to obtain white light. The required components or materials at least include blue or ultraviolet LED light-emitting chips, YAG transparent ceramics (ceramic layer), support reflectors and potting materials. The bracket mirror adopts a bowl-shaped reflective cup, and the potting material adopts transparent insulating glue such as silica gel, epoxy resin, and silicon dioxide. Such as figure 1 As shown, the exposed blue or ultraviolet LED chips 4 are first fixed to the bottom of the bowl-shaped reflective cup 1 with insulating glue. A low-power bowl-shaped re...

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Abstract

The invention discloses a method for preparing a white-light LED by YAG transparent ceramics. Firstly, a bare blue-light or ultraviolet-light LED chip is fixed in a support reflector by insulating glue; a YAG transparent ceramic layer is coated or enclosed on the light emitting path of the blue-light or ultraviolet-light chip after the electrode lead is welded by an ultrasonic ball-bonding machine; the wavelength of the blue-light LED chip drops within 450nm-480nm, and the wavelength of the ultraviolet LED drops within 250nm-540nm; the ceramic granules used by the YAG transparent ceramic layer drops within 1nm-300nm. The color coordinate of the emitted light can be changed by adjusting the thickness and the granule density of the ceramic layer. The invention can efficiently settle the problem of the attenuation of wavelength conversion material under high temperature; in addition, the invention can also effectively settle the problems of inconsistency of yellow diaphragm, blue-light diaphragm and white-light diaphragm, etc in the existing methods of white-light LED fabrication; the operation process is relatively simple, the reliability is high and the cost is low.

Description

technical field [0001] The invention relates to a method for converting blue light or ultraviolet LED (light-emitting diode) into white light by using YAG transparent ceramics, and belongs to the technical field of light-emitting diodes (LEDs). Background technique [0002] With the rapid development of semiconductor devices, especially high-brightness light-emitting diode (LED) technology, the lack of resources in the world has gradually become prominent, and people pay more attention to finding new lighting alternative materials. After 1999, the emergence of blue LEDs realized white light lighting. With the advancement of the semiconductor lighting industry, especially the application in general lighting, backlight, and decorative lighting, humanities are looking for higher efficiency, longer life, and higher reliability. Manufacturing method of white light LED. [0003] At present, the main method of making white LEDs is to use blue LEDs or ultraviolet LED chips to coat ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V19/00F21V9/08H01L33/00F21Y101/02F21Y115/10
Inventor 刘长江徐现刚张成山任忠祥刘琦
Owner SHANDONG INSPUR HUAGUANG OPTOELECTRONICS
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