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Fluorophor paste and method for manufacturing display device

A phosphor and slurry technology, applied in the field of phosphor slurry, can solve the problems of increasing the amount of addition, difficult dispersants, coloring, etc., and achieve the effects of reducing brightness degradation and increasing affinity

Active Publication Date: 2008-01-16
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using an anionic surfactant or a nonionic surfactant as a dispersant, there is a problem that the dispersing effect obtained with respect to the added amount is small due to its large molecular weight.
In addition, even if an amine compound such as an alkylamine or carboxylic acid amine salt is used, it is difficult to obtain a sufficient dispersion stabilization effect, or the amount added to obtain the dispersion stabilization effect may remain on the surface of the phosphor after firing and cause coloring. situation, difficult to use as a dispersant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～19

[0072] Phosphor paste was formulated using the following materials.

[0073] (A) Phosphor powder

[0074] ・(A-1) Cyan phosphor powder: BaMgAl 10 o 17 : Eu (hereinafter referred to as BAM), with an average particle size of 2.4 μm

[0075] ·(A-2) Red phosphor powder: (Y, Gd)BO 3 : Eu (hereinafter referred to as YGB), the average particle size is 2.3μm

[0076] ・(A-3) Green phosphor powder: Zn 2 SiO 4 : Mn (hereinafter referred to as ZSM), with an average particle size of 2.5 μm

[0077] ・(A-4a) ZSM coated with a zinc oxide layer with an average thickness of 0.2 μm

[0078] ・(A-4b) ZSM coated with an yttrium oxide layer with an average thickness of 0.2 μm

[0079] It should be noted that, as a method of coating the surface of the phosphor with a metal oxide in (A-4a) and (A-4b), the chloride, nitrate, etc. of the metal oxide (zinc oxide or yttrium oxide) to be coated It is formed by adding ZSM powder into the aqueous solution, fully stirring and drying, and then firing a...

Embodiment 1

[0158] Among Examples 1 to 5, in Example 3 in which the compounding amount of the dispersant was 1.0 parts by weight and in Example 4 in which the compounding amount of the dispersant was 3.0 parts by weight, the change in viscosity was small and the coatability was also good. In Example 5, the relative brightness of the phosphor is reduced to a certain extent due to the large amount of addition. In Examples 6 and 7 in which the compounding amount of the dispersant was 1.0 parts by weight and the type of the dispersant was changed, Example 6 obtained a result not much different from that of Example 1, and Example 7 used a dispersant with a large molecular weight, so the viscosity The rate of change increases and the relative brightness of the phosphor decreases.

[0159] Examples 8 to 13 are phosphor slurries with the same type of components but different compounding amounts of phosphor powders. Among them, the slurries of the compounding ratios of Examples 9 and 13 do not cau...

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Abstract

The invention provides a phosphor paste. The hosphor powder evenly and stably disperses over the paste and the time variation of viscosity is small, and the chromaticity variation of phosphor layer is small after burning. The phosphor paste contains phosphor powder, binder resin, primary amine or secondary amine compound with hydroxyl group, and / or an alkoxyl group and with molecular weight of below 300, and an organic solvent.

Description

technical field [0001] The present invention relates to a phosphor paste formed by uniformly dispersing phosphor powder, in particular to a phosphor paste used in a plasma display panel (hereinafter referred to as PDP) and a method for manufacturing the display. Background technique [0002] Compared with liquid crystal panels, PDPs can display at high speed and can be easily enlarged, so they are beginning to be applied to fields such as OA equipment and bulletin display devices. Furthermore, progress in the field of high-quality televisions and the like is also highly anticipated. With the expansion of the above-mentioned application range, a color PDP having a plurality of fine display units has gradually attracted attention. [0003] The PDP generates plasma discharge between electrodes in a discharge space disposed between a front glass substrate and a rear glass substrate, and ultraviolet light generated from a gas enclosed in the discharge space causes phosphors in t...

Claims

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Application Information

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IPC IPC(8): H01J1/62H01J17/04H01J17/49H01J9/20C09K11/00
CPCC09K11/08
Inventor 川崎学藤原秀行平井善英
Owner TORAY IND INC
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