JPS60148035A - Surface discharge type gas discharge panel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (81) Technical Field of the Invention The present invention relates to a surface discharge type gas discharge panel, and particularly to a panel structure with improved luminance.

(b) Background of the Technology One type of AC-driven gas discharge panel is a panel called a surface discharge type. In this type of gas discharge panel, both an X electrode and a Y electrode are disposed on only one of a pair of substrates that are placed facing each other with a gas-filled space in between. Its unique feature lies in the fact that it generates a horizontal discharge along the plane.

According to such a configuration, the requirement for the gap accuracy between the pair of substrates is significantly relaxed, and an ultraviolet-excited phosphor is added to the inner surface of the cover substrate, allowing for conversion of display colors and multicolor display. It has the advantage of being easy to perform.

For this reason, it has recently attracted particular attention, and research is underway to increase brightness for practical use in display panels.

(C) Prior Art and Problems FIGS. 1 and 2 are a plan view showing an example of the electrode arrangement of such a gas discharge panel, and a sectional view thereof taken along the line . In these figures, 1 is a lower glass substrate that functions as an electrode receiving substrate, 2 is a lower layer of X electrodes arranged in a horizontal direction, 3 is a dielectric layer made of low melting point glass, etc., and 4 is the X electrode. Multiple Y arranged vertically orthogonally to
It is an electrode. The intersection of the X electrode 2 and Y electrode 4 is
As shown by reference numerals 2a and 4a, the electrodes each have a circular shape expanding in the electrode width direction and constitute a gas discharge section. Note that the circular enlarged portion 2a of the X electrode is set to be large enough to completely surround the circular enlarged portion 4a of the Y electrode. Further, 5 is an insulating layer that insulates the Y electrode from the gas-filled space 6, and is made of a laminate of a dielectric material such as low melting point glass and magnesium oxide. Reference numeral 7 denotes an upper glass substrate for a cover, which is disposed opposite to the lower electrode support substrate structure and constitutes the gas-filled space 6.

In such a panel configuration, when a voltage is applied to the selected X electrode and Y electrode such that their combined voltage exceeds the discharge starting potential, an electric field is generated between the edges of the circular enlarged portions 2a and 4a of the crossed electrodes. As a result, a discharge occurs at the electrode intersection. However, in this electrode structure, although the area around the electrode edge where current concentration occurs emits light with relatively high brightness, the center of the upper layer Y electrode 4 becomes a dark area because no electric field is generated, and visually the center It exhibits a dark discharge point morphology. Therefore, the luminance of the discharge portion is low and the display is difficult to see when used as a display panel.

(d) Purpose of the invention - In view of the above-mentioned circumstances, the present invention aims to improve the display quality of a surface discharge type gas discharge panel in which a pair of electrodes are disposed opposite each other at the top and bottom with an insulating film in between. More specifically, the aim is to improve the electrode structure and achieve high-intensity light emission.

(e) Structure of the Invention Briefly stated, the surface discharge type gas discharge panel of the present invention has a structure in which the upper layer electrode has a smaller area than the lower layer electrode at its center. The feature is that a hole having a diameter of a certain proportion is formed, and an electric field is generated in the hole to cause a discharge.

Embodiment of the Invention Hereinafter, an embodiment of the invention will be described in detail with reference to the drawings.

FIGS. 3 and 4 are a plan view showing the electrode arrangement of the panel based on the peelable embodiment and a cross-sectional view thereof taken along the line IV-IV'. This panel has the same structure as that shown in FIGS. 1 and 2 above, except for the shape of the Y electrode in the upper layer. Therefore, in FIGS. The detailed explanation will be omitted.

That is, in the upper layer Y electrode 8, as shown in both figures, the center of the circular enlarged portion 8a is perforated. What is important here is that the diameter (da) of the perforation 8b greatly affects the luminous efficiency and brightness of the discharge section, and when db is the diameter of the circular enlarged portion 9a of the electrode, 0.5db≦da≦0. A range of 75db is optimal. That is, when the diameter da of the perforation 8b is less than 0.5 of the circular ampullae outer diameter ratio, only a small discharge spot is generated between the perforation and the lower X electrode 2.
A dark area remains between the discharge light generated around the outer periphery of the perforation,
Moreover, at 0.75 or more, due to the above-mentioned discharge phenomenon in which discharge occurs only at the electrode-edge portion, the center of the perforation does not emit light and becomes a dark area, in short, the above-mentioned 0.5db≦da≦
Outside the range of 0.75 db, dark portions occur in the light emission form, and it is still not possible to obtain high brightness. In other words, if the perforation diameter is selected within this range, it is possible to generate a sharp discharge spot with no dark areas. □ FIGS. 5 and 6 are diagrams showing the experimental results of the luminous efficiency and brightness of such a light emitting form, and in both figures, the horizontal axis represents the diameter of the large circular portion of the electrode. Note that this experiment was carried out in the lower layer
The outer diameter of the circular enlarged part of the electrode 2 is 210 μm, and the outer diameter of the circular enlarged part of the upper layer Y electrode 8 is 150 μm.9 The arrangement pinch of both electrodes is 0.
．． 45m, and neon (Ne) and xenon (Xe)
Mixed gas with pressure 500 for? This was done using a panel sealed with As is clear from these figures, according to the panel in which the hole 8b with a diameter of 90 μm is formed in the circular enlarged portion 8a of the upper layer Y electrode 8, the luminous efficiency and luminance are both about 2. Improved twice. In addition, with this maximum, the luminous efficiency is 1.2 Jm/w or more, and the brightness is 400.
Pore sizes in the range of 77-110 μm have been found to be useful, with optimum values of cd/rrf or higher. These pore diameters are 0.5 to 0.75 times larger than the outer diameter of the circular ampullae of the electrode.

In the above embodiment, the shape of the perforation 8b is a perfect circle, but it may be rectangular, or circular with a jagged inner edge, etc., as long as the perforation is essentially in the vicinity of the center of the electrode's circular expansion.

(gl) Effects of the Invention As is clear from the above explanation, the present invention significantly improves luminance in a surface discharge type gas discharge panel structure in which a pair of electrodes are disposed on the same substrate in a vertically intersecting manner. This can significantly improve display quality.

[Brief explanation of the drawing]

1 and 2 are a plan view showing an example of the electrode arrangement of a conventional surface discharge type gas discharge triple channel, and a sectional view thereof taken along the line ■-n', and FIGS. 3 and 4 are views of the present invention. A plan view showing the electrode arrangement of a panel based on one embodiment and its IV-IV
5 and 6 are diagrams showing the relationship between the perforation diameter of the upper layer electrode, the luminous efficiency, and the luminance for explaining the present invention in detail. In the figure, 1 is a lower glass substrate, 2 is a lower electrode, 3 is a dielectric layer, 4 and 8 are upper electrodes, 5 is an insulating layer, 6 is a gas-filled space, 7 is an upper glass substrate for a cover, 2a, 4
8a and 8a are electrode swelling parts, and 8b is a perforation, respectively. 1st Flash Figure 2 2a (2) 2a (2) Figure 3 Figure 4 ZCI (2) 2G (2)

Claims (1)

[Claims] ill Two layers of electrodes are arranged on one of a pair of substrates facing each other with a gas-filled space in between, and are arranged in a direction crossing each other with an insulating film interposed therebetween, and these upper layer electrodes and In a gas discharge panel structure in which discharge is generated near the intersection of lower layer electrodes, the lower layer electrode has a shape wider than the upper layer electrode, and the upper layer electrode has a shape with a hole in the center. The diameter of the hole is 0.5 to 0.
A discharge type gas discharge panel characterized by being formed with a ratio of 75. (2) The surface discharge type gas discharge panel according to claim (1), wherein the upper layer electrode has a circular shape, and the lower layer electrode has a ring shape.