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Method for spraying fluorescent powder slurry of plasma screen

A technology of plasma screen and fluorescent powder, which is applied in coatings and devices for coating liquid on the surface, etc., which can solve problems such as unfavorable product design and quality control, and large reserved space

Inactive Publication Date: 2014-02-12
SICHUAN COC DISPLAY DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current spraying method requires a large reserved space, which is not conducive to product design and quality control

Method used

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  • Method for spraying fluorescent powder slurry of plasma screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. The first spraying time is 0.2 seconds and the spraying pressure is 0.1 MPa; the second spraying time is 0.15 seconds and the spraying pressure is 0.18MPa; the third spraying time is 0.25 seconds and the spraying pressure is 0.26MPa; the fourth spraying time is 0.28MPa;

[0016] 2. The length of the pre-spraying area (AB) is 12mm;

[0017] 3. The return distance (AC) after the spraying starts is 4mm, which is 33.3% of the length of the pre-spraying area (AB);

[0018] 4. The spraying speed is 100mm / S.

Embodiment 2

[0020] 1. The first spraying time is 0.15 seconds and the spraying pressure is 0.1 MPa; the second spraying time is 0.2 seconds and the spraying pressure is 0.2MPa; the third spraying time is 0.2 seconds and the spraying pressure is 0.26MPa; the fourth spraying pressure is 0.28MPa;

[0021] 2. The length of the pre-spraying area (AB) is 12mm;

[0022] 3. The return distance (AC) after the spraying starts is 10mm, which is 83.3% of the length of the pre-spraying area (AB);

[0023] 4. The spraying speed is 100mm / S.

Embodiment 3

[0025] 1. The first spraying time is 0.25 seconds and the spraying pressure is 0.1 MPa; the second spraying time is 0.15 seconds and the spraying pressure is 0.2MPa; the third spraying time is 0.2 seconds and the spraying pressure is 0.26MPa; the fourth spraying pressure is 0.28MPa;

[0026] 2. The length of the pre-spraying area (AB) is 12mm;

[0027] 3. The return distance (AC) after the spraying starts is 6mm, which is 50% of the length of the pre-spraying area (AB);

[0028] 4. The spraying speed is 100mm / S.

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PUM

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Abstract

The invention discloses a method for spraying fluorescent powder slurry of a plasma screen, and belongs to the field of preparation of plasma screens. According to the method, a nozzle is involved; the fluorescent powder slurry is sprayed to a cell to be sprayed by a nozzle under the action of spraying pressure during movement; a pre-spraying region and an effective region are formed on the cell to be sprayed when the nozzle moves from a spraying starting position to a spraying finishing position; and the method for spraying the fluorescent powder slurry of the plasma screen is characterized in that the nozzle moves from the spraying starting position to a certain position in the pre-spraying region, then returns to the spraying starting position, and finally moves from the spraying starting position to the spraying finishing position. By the method, the thickness uniformity of the effective region of the spraying can be improved, or the pre-spraying region is reduced under equal uniformity, the effective utilization rate of the light-emitting area of a flat panel display is improved, and a narrow frame is designed.

Description

technical field [0001] The invention belongs to the field of plasma screen preparation, and in particular relates to a phosphor powder slurry spraying method. Background technique [0002] At present, the main method of manufacturing phosphor on the substrate after PDP is spraying by spraying machine. There is a row of holes for spraying slurry under the nozzle on the spraying machine, corresponding to the cells to be sprayed one by one, and the sprayed slurry material is filled in the nozzle. . During automatic production, when the nozzle moves forward, the nozzle is pressurized to spray the slurry in the cell, and the slurry tank supplies the slurry to the nozzle when returning. At the beginning of spraying, at the initial position and a certain distance thereafter, due to the influence of slurry rheology, nozzle moving acceleration and other factors, the spraying amount will fluctuate, so the phosphors close to the initial position of spraying in the effective luminous a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D1/12
Inventor 徐军金焱王鹏年陈富贵
Owner SICHUAN COC DISPLAY DEVICES