JP2679036B2 - Method of manufacturing gas discharge panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] The present invention relates to a substrate of a gas discharge panel having a phosphor layer, using a liquid ejecting apparatus in a cell-formed partition wall formed in advance on the substrate, A method of manufacturing a gas discharge panel, which comprises forming a phosphor layer. [Industrial field of application] A gas discharge panel plays a part of a color flat panel display represented by a wall-mounted television. The technique of the present invention describes a new method of forming a phosphor layer on the inner surface of a cover substrate which is a display surface of a surface discharge type gas discharge panel, which is regarded as promising. [Prior Art] The color display surface formed on the cover substrate 6 of the conventional surface discharge type plasma display panel is selected according to the application, such as precipitation method, spray method, spinner coating method, printing method, thin film method, etc. There are many, but here we will use the reliable printing method as an example. FIG. 4 shows the structure of the cover substrate 60 during the attachment of the fluorescent substance by the printing method. In the figure, 70 is a mounting base for fixing a substrate, 60 is a cover substrate, and 61 is a pattern for applying a mesh-like fluorescent material which has already been formed by printing, and is called a partition. Reference numeral 20 is a printing mask, 22 is a fluorescent material corresponding to the ink being printed, and 21 is a roller for pushing out the fluorescent material from the mask. Attach the cover substrate 60 on which the partition wall 61 for coating the low-density fluorescent substance having a height of 20 μm or less is preliminarily mounted on the mounting base 70, and fix the printing mask 20 in accordance with the alignment mark not shown, and by the roller 21, the fluorescence The body material ink 22 is extruded from the mask 20 into the partition wall 61 to be dried and solidified. In the case of color display, the above fluorescent substance applying step is repeated a plurality of times for the required number of colored fluorescent substances. The cover substrate 60 formed in this manner, the discharge cell and the fluorescent body portion surrounded by the barrier wall are aligned so as to face the electrode substrate made in advance, and the panel end portion is sealed and discharge gas is added, Surface discharge type plasma display panel is completed. [Problems to be Solved by the Invention] In order not to respond to stimulation by ultraviolet rays from other than the cell, the fluorescent body may be surrounded by a partition wall. If the partition wall is high, the unevenness is severe, and therefore, the thin film method cannot be used because a specific cell cannot be processed in another process by using a mask. However, it is not practical to attach the fluorescent body first and the partition wall later because the mechanical strength of the partition wall cannot be obtained. Therefore, after forming a complete, tall partition, one would like to apply the phosphor into the partition. [Means for Solving the Problems] If the nozzle 2 is separated from the partition wall 7 on the substrate to be attached, the fluorescent substance can be applied over the partition wall 7. Since the inkjet method has this property, the fluorescent material may be applied by the inkjet method. [Operation] After constructing a high partition wall that does not allow scattered ultraviolet rays,
The fluorescent material can be attached to the exposed surface of the substrate behind the partition without contacting the partition. [Embodiment] For the purpose of explaining the present invention, the principle of using a single nozzle is shown in FIG. 1, the embodiment using a plurality of nozzles is shown in FIG. 2, and a detailed sectional view of a cell unit of a cover substrate 6 is shown in FIG. As shown in the figure. In FIG. 1, 1 is an ejection head, 2 is a nozzle, 3 is a scanning mechanism, 4 is a control cable, 5 is a control unit, 6 is a cover substrate, 7 is a partition wall, 8 is a mounting base, 9 is a fluorescent body, and 10 is a fluorescent substance. Is another scanning unit, 11 is a feed screw, and 12 is a receiving screw. The ejection head 1 slides on the scanning mechanism 3 and at the same time, the scanning mechanism 3
It itself moves in the direction perpendicular to the sliding direction and moves on the entire surface of the cover substrate 6 at each pixel pitch. Therefore, a spatial distance is maintained between the nozzle 2 and the partition wall 7. The partition substrate 7 is preliminarily processed on the mounting base 8 and the cover substrate 6 mounted thereon is fixed so as not to move. Since each temporary stop position of the ejection head 1 moving on the scanning mechanism 3 controlled by the control unit 5 via the control cable 4 corresponds to the pixel position, when the ejection position is reached, the inside of the ejection head 1 is stopped. The fluorescent body fluid is dropped or jetted from the nozzle 2 through the nozzle 2. The dripping or jetting fluorescent liquid is dried and, as shown in the cell detailed cross-sectional view of FIG. 3, the dripping or the dripping from the nozzle 2 is performed on the portion surrounded by the partition wall 7 corresponding to the display discharge point on the cover substrate 6. By the jetting, the phosphor 9 is applied. The fluorescent substance may be applied on the inner surface of the partition wall. The apparatus shown in FIG. 2 is a fluorescent substance coating apparatus improved from the above-described principle diagram, in which a plurality of nozzle portions 1 are held to improve the working speed. The plurality of nozzles may be ones that eject three nozzles for the three primary colors at the same time, or ones of the same color arranged at equal intervals. The ejection head 1 may be moved by a so-called servo method in which the position of the ejection head 1 is corrected while detecting the target position by means of light or the like, or a method of regulating the digital movement amount in an open loop by a pulse motor. It may be. Further, since the scanning between the ejection head 1 and the cover substrate 6 is relative, as shown in FIG. 2, the mounting base 8 is controlled by the feed screw 11 and the receiving screw 12 under the control of the scanning unit 10. You can also scan to. The fluorescent substance attached as described above is attached in the structure shown in FIG. Ultraviolet rays from the discharge come from the direction of arrow Q and stimulate the fluorescent body 9. The partition 7 does not directly stimulate the adjacent cell, and the scattered ultraviolet light from the adjacent space is blocked. [Advantages of the Invention] Cover substrate 6 in which the partition walls are raised to eliminate crosstalk
Then, the fluorescent substance could not be attached to the bottom of the partition wall by the conventional thick film method or thin film method. If the fluorescent substance and the partition wall are exchanged in the manufacturing order and the fluorescent substance is attached first, the partition wall is not mechanically stable and it is difficult to fix the partition wall to the substrate. Therefore, when the liquid ejecting apparatus of the present invention is used, the fluorescent substance can be attached to the display point without being obstructed by the high partition wall.

[Brief description of the drawings] FIG. 1 shows the principle of the present invention, FIG. 2 shows an embodiment of the present invention, FIG. 3 is a cover substrate of an example of the present invention, FIG. 4 shows a conventional embodiment. In the figure, 1 is an ejection head, 2 is a nozzle, 3 is a scanning mechanism, 5 is a control unit, 6 is a cover substrate, 7 is a partition wall 9 is a fluorescent body, 10 is the scanning unit, 11 is a feed screw, 12 is a receiving screw.

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Mamoru Miyahara               Fujitsu, 1015 Ueodanaka, Nakahara-ku, Kawasaki-shi               Inside the corporation                (56) References JP-A-53-79371 (JP, A)                 JP-A-61-296649 (JP, A)

Claims (1)

(57) [Claims] In a method of manufacturing a surface discharge type gas discharge panel in which one substrate provided with a plurality of surface discharge electrodes for display is arranged and the other substrate in which phosphors of a plurality of colors are regularly arranged is arranged, A step of forming barrier ribs of a predetermined pattern on the substrate, and a head provided with a plurality of nozzles arranged at predetermined intervals corresponding to the barrier rib pattern facing the substrate on which the barrier ribs are formed. A method of manufacturing a gas discharge panel, comprising the steps of simultaneously applying phosphor liquid of the same color from each nozzle into a plurality of partition walls on the substrate.