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White light LED

A diode and white light technology, applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of unrealistic industrial application, poor life and stability of white light diodes, achieve long service life, improve stability, slow down The effect of light attenuation

Inactive Publication Date: 2007-02-14
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, it has also been proposed to use blue light-emitting grains to excite the red and green phosphor layers to obtain white light. However, due to the thermal attenuation and chemical attenuation of the phosphors, especially the red phosphors, in the traditional light-emitting diode packaging structure, the life and stability of the white light diode Poor, unable to realize its application in industry

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0028] This example illustrates the white light diode provided by the present invention.

[0029] according to figure 1 In the packaging method shown, the light-emitting element 1 is first fixed inside the bowl of the packaging bracket 4, and the light-emitting element 1 and the packaging bracket 4 are electrically connected with the wire 5, and then a layer of transparent material layer 2 is coated on the light-emitting element 1, The thickness is 100 μm higher than the height of the wire, and then the colloid containing the photoluminescent phosphor 3 is dropped, the colloid is epoxy resin, and is used as a solvent, and the photoluminescent phosphor 3 in the colloid containing the photoluminescent phosphor 3 The concentration is 30% by weight, it is dried and solidified for use. The outer packaging transparent colloid 6 is made of epoxy resin and packaged into a lamp shape (Lamp) to obtain the white light diode A provided by the present invention.

[0030]Among them, the l...

Embodiment 2

[0032] This example illustrates the white light diode provided by the present invention.

[0033] Prepare a white light diode according to the method of Example 1, the difference is, according to figure 2 The encapsulation method shown is encapsulation into a surface mount type (SMD), and the white light diode B provided by the present invention is obtained.

Embodiment 3

[0035] This example illustrates the white light diode provided by the present invention.

[0036] White light diodes are prepared according to the method of Example 1, the difference is that the FD1414 series of light-emitting elements produced by Fangda Group are selected for use as InGaN blue light chips with a wavelength of 400-440 nanometers; the transparent material layer 2 is produced by Jiangyin Tianxing Thermal Insulation Material Co. The brand is TX-400-1A / B bisphenol A epoxy resin with a light transmittance of 85%; the red phosphor powder in the photoluminescent phosphor 3 is made of Eu-doped Y 2 o 2 S, the green phosphor is selected from Ba doped with Eu 10 (PO 4 ) 6 Cl 2 , respectively under the reducing atmosphere of carbon monoxide, under the condition of 1200 degrees Celsius, solid state reaction for 5 hours to prepare red phosphor and green phosphor, and then mixed according to the molar ratio of 3:1 to prepare red and green mixed phosphor layer. The white...

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Abstract

A white light diode includes a light emitting element, a photoluminescence phosphor body and a transparent substance layer is included between the light emitting element and the photoluminescence phosphor. Since a transparent substance is coated between the element and the phosphor body, they are not contacted to each other directly, therefore, the fluorescent powder wrapping on the light emitting element is improved and light attenuation of the powder is slow down.

Description

technical field [0001] The invention relates to a light-emitting diode, more specifically to a three-wavelength white light diode. Background technique [0002] Light Emitting Diode (LED for short) has the characteristics of long life, power saving, fast response, high reliability, environmental protection, safety and so on. With the advancement of technology, the brightness of LED has gradually increased, and white light diodes have also been gradually developed, opening the way for the development of new lighting sources. The most common technology for making white light diodes is to use a single luminescent grain to generate white light. The main technology is to coat a layer of phosphor powder on the surface of the luminescent grain, and the light generated by the luminescent grain excites the phosphor layer to make it produce The light of different wavelengths is mixed with the color of the light emitted by the original luminescent crystal grains to produce white light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00H01L33/48H01L33/50
CPCH01L2224/8592H01L2924/181H01L2224/48091H01L2224/48247H01L2224/48257H01L2924/00014H01L2924/00012
Inventor 许波张军平
Owner BYD CO LTD