JPH02132732A - Formation of phosphor film for pdp for color display - Google Patents

Abstract

PURPOSE:To enable a phosphor film having a fixed thickness to be formed even in case of a phosphor film formation part having the shape of an uneven face by spraying and fixing phosphor ink on a phosphor film formation part of a front glass plate to form the phosphor film on the phosphor film formation part. CONSTITUTION:A front glass plate 1 is moved in the X, Y directions for making one set of the recess parts 2, 3, 4 for phosphor films for a first R, G, B to face an ink jet gun 6. Next, the ink jet gun 6 jets particles 12, 13, 14 of phosphor ink for R, G, B while moving in the x, y directions so that the surfaces of the recessed parts 2, 3, 4 for phosphor films for R, G, B are scanned to fix particles 12, 13, 14 of phosphor ink for R, G, B so as to form phosphor films 22, 23, 24 for R, G, B. Thereby, even in case the surface of the phosphor film formation part is an uneven face, the phosphor film having the almost fixed thickness is formed on the surface thereof.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a color display plasma display panel (
This paper relates to improvements in the method of forming phosphor films for PDPs (hereinafter simply referred to as PDPs). [Prior Art] Conventionally, thick film printing methods, blade coating methods, and the like are known as methods for forming phosphor films for color display PDPs. The thick film printing method forms a phosphor film by printing a phosphor paste through a mask, and the blade coating method forms a phosphor film by applying a phosphor paint through a mask using a blade. It forms a film. [Problems to be solved by the invention] However, in the conventional thick film printing method and blade coating method, the phosphor film is formed by printing or coating, so the phosphor film forming part of the front glass plate is flat. It's good when it's in shape, but
When the phosphor film forming area has an uneven surface shape, such as when a barrier to prevent color crosstalk or a recessed part is formed to increase luminous efficiency, the phosphor film must be formed with a constant thickness. The problem was that it was difficult. The present invention has been made in view of the above-mentioned problems, and provides a method for forming a phosphor film that can form a phosphor film of a constant thickness even when the phosphor film forming portion has an uneven surface shape. The purpose is to [Means for Solving the Problems] A method for forming a phosphor film in a PDP for color display according to the first invention includes jetting and fixing phosphor ink onto the phosphor film forming portion of the front glass plate. According to the present invention, a phosphor film is formed on the phosphor film forming portion. A method for forming a phosphor film on a PDP for color display according to the second invention includes sequentially moving a relatively movable inkjet gun and a front glass plate to predetermined positions, and ejecting phosphor ink from the inkjet gun. A phosphor film is formed on the phosphor film forming portion of the front glass plate by fixing particles of the above to the phosphor film forming portion of the front glass plate. The method for forming a phosphor film on a PDP for color display according to the third aspect of the present invention is to electrostatically deflect particles of phosphor ink sprayed from an inkjet gun and fixing them on the phosphor film forming portion of a front glass plate. , a phosphor film is formed in the phosphor film forming portion.

[Function] In the first invention, by jetting and fixing the fluorescent ink to the fluorescent film forming portion formed on the surface of the front glass plate by press working or the like, the fluorescent film forming portion is formed on the surface of the front glass plate. Forms a phosphor film. Since the phosphor ink is sprayed and fixed, even if the surface of the phosphor film forming portion is uneven, a phosphor film of approximately constant thickness is formed on the surface.

In the second invention, by moving the inkjet gun and/or the front glass plate, the relative positions of the two are sequentially moved to a predetermined position, and particles of the phosphor ink jetted from the inkjet gun are transferred to the front glass plate. By adhering to the phosphor film forming part, a phosphor film is formed on the phosphor film forming part. Since phosphor ink particles are ejected from an inkjet gun and fixed, even if the surface of the phosphor film formation area is uneven, a phosphor film of approximately constant thickness is formed on the surface. , the pattern accuracy of the formed phosphor film is good. In the third invention, the relative position between the inkjet gun and the front glass plate is fixed, and particles of the phosphor ink jetted from the inkjet gun are electrostatically deflected to form a phosphor film on the front glass plate. A phosphor film is formed on the phosphor film forming part by fixing the phosphor film to the phosphor film forming part. The particles of phosphor ink ejected from an inkjet gun are electrostatically deflected and fixed, so even if the surface of the phosphor film forming area is uneven, a phosphor film of approximately constant thickness can be formed on the surface. Furthermore, a phosphor film with good pattern accuracy can be easily formed. [Embodiment] Figure 1 shows an embodiment of the present invention, in which numeral 1 represents a front glass plate of a color display PDP. The front glass plate 1 is fixed to a moving mechanism (not shown), and
, and can move in the Y direction. The surface of the front glass plate 1 is formed with phosphor film recesses 2, 3, and 4 for R (red), G (green), and B (blue) as phosphor film forming portions by pressing or the like. , . . . and a barrier 5 for preventing color crosstalk are formed. Said R. G. The phosphor film recesses 2, 3, 4, . G. This corresponds to the B discharge cell group. At a position a predetermined distance away from the surface of the front glass plate 1, an R. G. An inkjet gun 6 for ejecting B fluorescent ink particles 12, 13, and 14 is provided. The inkjet gun 6 is connected to an ink tank, a pump, etc. (not shown), and is also fixed to a moving mechanism. It can move in the x and y directions.

Next, the radius of the front glass plate 1 is adjusted. A method for forming a phosphor film in the phosphor film recesses 2, 3, 4, . . . for G and B will be explained. Place the front glass plate 1 in the X. Move in the Y direction,
The first R. One set of phosphor film recesses 2, 3, and 4 for G and B are placed opposite to the inkjet gun 6. Then, while moving the inkjet gun 6 in the X and y directions, R, G. By jetting the particles 12, 13, and 14 of the phosphor ink for B, the surfaces of the phosphor film recesses 2, 3, and 4 for R, G, and B are scanned. Particles 12, 13, and 14 of fluorescent ink for R.I. G. Form B phosphor films 22, 23, and 24. Next, the front glass plate 1 is moved a predetermined distance in the While moving in the X and y directions, R, G. Particles of fluorescent ink for B 12, 13, 1
By injecting R.4, the next R. G. The R, G. B
fixing particles 12, 13, 14 of fluorescent ink for
R. G. Fluorescent film for B 22. 23 and 24 are formed. Thereafter, in the same manner, the R of the front glass plate 1. G. All of the B phosphor film recesses 2, 3, 4, . . . G. B phosphor films 22, 23, 24, . . . are formed.

In the embodiment described above, the front glass plate and the inkjet gun are moved to adjust the radius of the front glass plate. Although the phosphor film is formed in all of the phosphor film recesses for G and B, the present invention is not limited to this, and it is possible to move either or both of the front glass plate and the inkjet gun. R, G of the front glass plate. The phosphor film may be formed in all of the B phosphor film recesses.

In the embodiment described above, the R, G. Although the phosphor film is formed in all of the phosphor film recesses for B, the present invention is not limited to this, and the front glass plate and the inkjet gun are fixedly arranged, and the inkjet gun Even if the ejected particles of the phosphor ink are deflected and fixed by electrostatic deflection, the phosphor film is formed in all the recesses for the R, G, and B phosphor films on the front glass plate. good. For example, as shown in FIG. 2, fluorescent ink particles 12, 13, and 14 ejected from the inkjet gun 6 are connected to charging electrodes (not shown).
The horizontal and vertical deflection electrodes 7, 8 and 9, 1
By electrostatically deflecting and fixing at 0, the radius of the front glass plate 1 is fixed. G. B phosphor film recesses 2, 3, 4,...
R. G, B phosphor films 22, 23, 24, .
. . . may be formed.

In the above embodiment, an inkjet gun was used to spray the fluorescent ink particles, but the present invention is not limited to this, and the fluorescent ink can be sprayed from a device other than the inkjet gun to spray the fluorescent ink particles onto the front glass. It may also be fixed to the phosphor film forming part of the plate. In the above embodiment, the phosphor film forming portion to which the phosphor ink is fixed was a phosphor film recess with a concave surface, but the present invention is not limited to this. The surface may be convex or planar.

[Effects of the Invention] As described above, the method for forming a phosphor film on a PDP for color display according to the present invention includes spraying and fixing phosphor ink onto the phosphor film forming portion of the front glass plate. Since the phosphor film is formed on the phosphor film forming part, even if the phosphor film forming part has an uneven shape, a phosphor film of almost constant thickness can be easily formed on the surface of the phosphor film forming part. can do. Furthermore, when particles of the phosphor ink ejected from an inkjet gun are fixed to form a phosphor film on the phosphor film forming portion, it is possible to form the phosphor film with high pattern accuracy. Can be done. In addition, if particles of phosphor ink ejected from an inkjet gun are electrostatically deflected and fixed to form a phosphor film on the phosphor film forming area, it is possible to use phosphor ink with good pattern accuracy. A film can be easily formed.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the method for forming a phosphor film for a color display PDP according to the present invention. G. One set of recesses for the phosphor film for B is provided with R. After forming the phosphor films for G and B, the next R. G. One set of recesses for the phosphor film for B is provided with R. FIG. 2 is a perspective view of a main part showing a state in which phosphor films for G and B are formed, and FIG. 2 is a perspective view of a main part in another embodiment. DESCRIPTION OF SYMBOLS 1... Front glass plate, 2, 3, 4... Concave part for phosphor film (phosphor film forming part), 5... Barrier, 6... Ink cartridge x't gun, 7, 8 , 9, 10... deflection electrode,
12, 13, 14... fluorescent ink particles, 22.
23. 24... Fluorescent film. Applicant Fujitsu General Ltd.

Claims (3)

[Claims] (1) A collar characterized in that a phosphor film is formed on the phosphor film forming portion of the front glass plate by jetting and fixing phosphor ink to the phosphor film forming portion. A method for forming a phosphor film for a display PDP. (2) The relatively movable inkjet gun and the front glass plate are sequentially moved to predetermined positions, and particles of the phosphor ink jetted from the inkjet gun are applied to the phosphor film forming portion of the front glass plate. A method for forming a phosphor film for a PDP for color display, characterized in that a phosphor film is formed on the phosphor film forming portion by fixing the phosphor film. (3) A phosphor film is formed on the phosphor film forming portion of the front glass plate by electrostatically deflecting particles of the phosphor ink ejected from an inkjet gun and fixing them to the phosphor film forming portion of the front glass plate. A method for forming a phosphor film for a PDP for color display, characterized in that: