Single-colour fluorescent powder spraying method for plasma display device

Abstract

The method is suitable for preparing the luminescent powder applicable in plasma displays with the structure of electric grid mesh plate and the barrier type plasma displays. Based on the principle of spray coating by pressure spray guns or by static spray guns, the prepared luminescent powder pulp is spraying coated on the meshes of the inner wall of the electric grid mesh plate or the surface of the inner wall of the barrier forming the monochromatic luminescent powder layer. Comparing with the prior art, the invention possesses the features of simple equipment, high efficiency and good chromatic purity etc.

Description

(1) Technical field [0001] The invention belongs to the technical field of phosphor layer production for plasma displays, and in particular relates to a method for fabricating phosphor layers in a plasma display with a conductive grid structure and a barrier-type plasma display. (2) Background of the invention [0002] In the existing plasma display, the composition of the front plate starts from the glass substrate, which is respectively a transparent conductive electrode layer, the bus electrode layer and the dielectric layer, and the composition of the rear plate starts from the glass substrate, which is respectively a signal electrode layer, a dielectric layer and a barrier layer. A series of high and narrow grooves are formed on the surface of the dielectric layer by means of printing or sandblasting with low-melting point glass powder, and finally sintered to form barriers. This type of plasma display is a barrier-type plasma display. The height of the barrier is betw...

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Problems solved by technology

[0003] 1. Poor uniformity

Using the method of screen printing, the phosphor slurry first enters the top of the inner wall of the barrier, and by adjusting the viscosity of the phosphor slurry, it flows to the bottom of the inner wall of the barrier with the weight of the phosphor slurry itself and is leveled. The amount of material entering the barrier depends on the state of the screen printing machine, and it cannot be completely uniform; at the same time, the surface state of the inner wall of the barrier affects the flow of the slurry. Therefore, the uniformity of the phosphor layer formed on the inner wall and bottom of the barrier cannot be consistent, resulting in The thickness of the phosphor layer after high-temperature pre-burning is inconsistent, which affects the uniformity of device discharge and increases the difficulty of driving

[0004] 2. Luminescent performance of phosphor powder deteriorates

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