Fluorescent powder slurry materialfor plasma display and forming method on shadow mask

A plasma and phosphor technology, used in chemical instruments and methods, fluorescent layers, luminescent materials, etc., can solve the problems of poor thixotropy of phosphor paste, improve dispersibility and suspension, good adhesion, easy-to-achieve effects

Inactive Publication Date: 2008-04-09
NANJING HUAXIAN HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the purposes of the present invention is to invent a phosphor paste for plasma displays with good thixotropic performance in view of the poor thixotropy of existing phosphor pastes

Method used

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  • Fluorescent powder slurry materialfor plasma display and forming method on shadow mask

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, formulate the blue phosphor paste and make it on the shadow mask:

[0025] The organic resin ethyl cellulose 3 g, SiO 2 2 grams of nano-powder and 45 grams of organic solvent terpineol were mixed and fully dispersed, and the organic carrier was prepared under stirring in a water bath, and then 50 grams of blue phosphor particles were fully dispersed in it to form a blue phosphor slurry.

[0026] The blue phosphor paste prepared above is printed on the shadow mask by screen printing method. After printing, the shadow mask is placed on the platform and leveled for 10-15 minutes, and observed under a microscope. The printing material is full, no blocking holes, no bubbles. Directly put the shadow mask into an oven at 150°C to 170°C for drying, and the drying time is 15 to 20 minutes. After drying, put it under a microscope to observe the condition of the phosphor film layer. It can be seen that the two walls and bottom of the shadow mask hole are uniformly attache...

Embodiment 2

[0035] First, formulate the blue phosphor paste and make it on the shadow mask:

[0036] The organic resin ethyl cellulose 6g, SiO 2 3 grams of nano-powder and 51 grams of organic solvent terpineol were mixed and fully dispersed, and an organic carrier was prepared under stirring in a water bath, and 40 grams of blue phosphor particles were fully dispersed in it to form a blue phosphor slurry.

[0037]The blue phosphor paste prepared above is printed on the shadow mask by screen printing method. After printing, the shadow mask is placed on the platform and leveled for 10-15 minutes, and observed under a microscope. The printing material is full, no blocking holes, no bubbles. Directly put the shadow mask into an oven at 150°C to 170°C for drying, and the drying time is 15 to 20 minutes. After drying, put it under a microscope to observe the condition of the phosphor film layer. It can be seen that the two walls and bottom of the shadow mask hole are uniformly attached to the...

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Abstract

The invention relates to a fluorescent powder slurry for plasma display and the formation method on shadow mask, belonging to the technical field of flat panel TV set. The inventive slurry consists of fluorescent powder, organic resin, organic solvent and nanopowder, wherein the fluorescent powder accounts for 40-50 percent of the total weight, the organic resin accounts for 3-6 percent of the total weight, the organic solvent accounts for 45-55 percent of the total weight, and the nanopowder accounts for 0.5-3 percent of the total weight. The proper amount of nanopowder (0.5-3 percent) added into the fluorescent powder slurry can effectively improve the dispersion and the suspension properties of the fluorescent powder in the slurry and can well improve the thixotropy of the fluorescent powder slurry so as to ensure that the slurry viscosity decreases during printing to obtain adequate feeding amount and also ensure that the slurry can rapidly regain the high viscosity and settle at the periphery of small holes other than flowing out when the slurry is printed to the holes of the shadow mask. Meanwhile, the slurry can be oven-dried and sintered after the printing process such that the nanopowder is filled into the gap between particles of fluorescent powder, thereby well bonding the fluorescent powder particles and preventing powder loss resulting from insufficient bonding force of the fluorescent powder.

Description

technical field [0001] The invention relates to a plasma display technology, in particular to a phosphor powder for a plasma display and a method for forming the phosphor on a shadow mask, in particular to a phosphor paste for a plasma display and a method for forming the phosphor on the shadow mask. method. Background technique [0002] At present, SMPDP is a new type of shadow mask type surface discharge AC-PDP. In its production process, the shadow mask (metal grid plate) commonly used in color CRT production is used to replace the complex barrier production in PDP, the metal grid plate is independently processed, and phosphors are made on it, and finally the front substrate, The metal grid plate and the rear substrate are assembled in a "sandwich" manner to make the entire screen, as shown in Figure 1. The discharge unit is composed of three shadow mask holes 12 on the metal grid plate 3. R, G, B three-color phosphor pastes are sequentially applied in the shadow mask h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J17/04H01J1/63C09K11/00H01J9/20H01J11/42
Inventor 刘凯樊兆雯张雄王保平朱立锋林青园
Owner NANJING HUAXIAN HIGH TECH CO LTD
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