Method for producing transparent ceramic fluorescence substrate used for LED

A technology of transparent ceramic and fluorescent substrate, applied in the field of LED light source, can solve the problems of affecting the quality of light output, restricting mass production and yield, affecting the uniformity of light output, etc., to achieve easy control of thickness, good uniformity of light output, and improved consistency. Effect

Inactive Publication Date: 2012-10-10
SUZHOU JINGPIN OPTOELECTRONICS
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Problems solved by technology

[0008] However, the above process has the following disadvantages: 1. The fluorescent powder mixture will be affected by the shape of the cup mouth of the bracket, resulting in a yellow or blue circle phenomenon, which affects the quality of light output; 2. The way of dispensing is to use gravity and other mechanical e

Method used

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  • Method for producing transparent ceramic fluorescence substrate used for LED
  • Method for producing transparent ceramic fluorescence substrate used for LED

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] Such as figure 1 Shown is a process flow chart of a method for preparing a transparent ceramic fluorescent substrate for LEDs, and a specific step is described below:

[0035] (1) Mixture: chemically synthesize a mixture of one or more than two phosphors and yttrium aluminum pomegranate at a molar ratio of 1:99 to form a ceramic dispersion of phosphor powder, in which yttrium aluminum pomegranate is doped with aluminate or one or both of the nitrides;

[0036] (2) Granulation: The phosphor ceramic dispersion is passed through stirring granulation method, boiling granulation method, spray drying granulation method, pressure molding granulation method, mold compression granulation method, extrusion granulation method, extrusion spheronization Granulation method, spray and dispersion mist granulation method or hot melt molding granulation method or a combination ...

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Abstract

The present invention discloses a method for producing a transparent ceramic fluorescence substrate used for a LED, which comprises the following steps: (1) mixing; (2) granulating; (3) molding; (4) isopressing; (5) dumping and sintering; (6) polishing and grinding; and (7) scribing. The substrate prepared by the method of the invention can realize all the functions of a traditional substrate, and has fluorescent characteristics, the LED chips can be directly fixed on the substrate for realizing the white light of the LED, because that various concentrations of fluorescent powder in silica gel and resin can be eliminated, the consistency of the LED products can be enhanced, the substrate prepared by the method of the invention has the advantages of good light uniformity, easy thickness control, and the method provided by the invention belongs to the planarization process, and is suitable for integrated large-scale production.

Description

technical field [0001] The LED light source of the present invention particularly relates to a preparation method of a transparent ceramic fluorescent substrate for LED. Background technique [0002] In recent years, whether it is inorganic or organic light-emitting devices (LED / OLED), white LED devices and their applications in lighting-related fields have received great attention from both academic and industrial circles. There are two main ways for white LEDs to produce white light: the first is to combine red, green and blue LED chips to produce white light; the second is to use LEDs to excite photo-induced conversion phosphors to form white light. A more mature method is to use blue LED chips with yellow phosphors (such as YAG: Ce3+, etc.) to achieve white light emission. [0003] For photoconverted white LEDs, the structure and characteristics of phosphor coatings have a crucial impact on the performance of white LEDs. The current process of preparing this type of ph...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/44C04B35/505
Inventor 高鞠王媛
Owner SUZHOU JINGPIN OPTOELECTRONICS
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