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Fluorescent powder coating method

A phosphor powder and phosphor layer technology, applied in printing, printing devices, electrical components, etc., can solve the problems of reduced light extraction efficiency, achieve the effect of improving light extraction efficiency and meeting the consistency of light extraction chromaticity

Inactive Publication Date: 2015-06-10
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, for a phosphor layer of equal thickness, the light extraction efficiency is significantly reduced for parts with weak light intensity.

Method used

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  • Fluorescent powder coating method

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] refer to Figure 1-3 , 6, is the first embodiment of the present invention is a phosphor coating method, which is specially used for the preparation of LED light source phosphor layer, which is characterized in that it includes the following steps: S1) providing a coated carrier; S2) providing a screen printing device; S3) providing phosphor and colloid mixture; S4) silk screen printing; S5) drying; wherein, the sequence of steps S1) to S3) is not limited; and, the screen printing device includes a screen printing screen, and the screen printing screen is at least in one direction The permeability of the central part is greater than that of the edge. refer again figure 1 , image 3 , the blackened area in the figure indicates the through hole. In this embodiment, only in the width direction of the screen printing screen, the permeability of the mid...

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Abstract

The invention relates to a semiconductor lighting technique, in particular to a fluorescent powder coating method. The fluorescent powder coating method comprises the following steps: S1) providing a coated carrier; S2) providing a silk-screen printing device; S3) providing fluorescent powder and a colloid mixed agent; S4) carrying out silk-screen printing; and S5) drying, wherein sequences of the steps S1) to S3) are not limited; moreover, the silk-screen printing device comprises a silk screen; and permeation rate of the middle part of the silk screen in at least one direction is more than that of the edge of the silk screen. The invention provides the fluorescent powder coating method with high light catching efficiency and capability of enabling the chromaticity of the whole light source module to tend to be consistent.

Description

technical field [0001] The invention relates to semiconductor lighting technology, in particular to a fluorescent powder coating method. Background technique [0002] LED lights have the characteristics of long life and power saving, and are more and more widely used in the field of lighting. For traditional light sources, in order to improve color rendering, fluorescent powder or fluorescent film is generally coated on the surface of the LED chip to emit light in the form of a point light source, such as the chip-type LED disclosed in Chinese patent document CN201204213. The chip-type LED includes a chip, a chip set On the upper surface of the ceramic support, and the chip is located in the closed space of the ceramic support, the plastic shell, and the lens, the electrodes of the chip are led out of the closed space through the electrode leads, and the fluorescent film is arranged on the light-emitting surface of the chip. Another example is the LED surface light source d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41M1/12H01L33/50
Inventor 王钢罗滔薛志强
Owner SUN YAT SEN UNIV