JPS6231775B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an AC-driven gas discharge display panel, and more particularly to a gas discharge display panel in which a phosphor is combined with a laminated structure of panel elements to enable display color conversion. It is.

This type of AC-driven gas discharge display panel has a pair of opposing electrodes placed in a discharge gas space with a dielectric layer in between, and an electric field is applied between these two electrodes to cause the electrode intersection (discharge cell) to discharge. It is known as a device that displays by emitting light and has a memory function due to the effect of wall charges induced on the surface of the dielectric layer during discharge. In this panel, a phosphor is sometimes coated on the inner surface of the panel in order to perform color conversion of discharge light.

FIG. 1 shows an example of the structure of a conventional AC-driven gas discharge display panel that enables such display color conversion, with A being a cross-sectional view and B being a plan view. In the figure, 1 and 2 are first and second glass substrates, 3 is an X electrode, 4 is a Y electrode, 5 is a dielectric layer, and 6 is a dielectric layer.
is a discharge gas space, and 7 is a fluorescent material. A large number of the electrodes 3 and 4 are arranged so as to cross each other, and a discharge cell is formed at the intersection. Further, the phosphor 6 is usually applied in a donut shape, avoiding the intersections of the electrodes to avoid sputtering. In such a configuration, when a discharge occurs in the discharge cell, the phosphor 7 emits light due to the effect of photoluminescence excited by the discharge light, for example, ultraviolet light, increasing the brightness and changing the display color. It turns out.

However, in the above conventional panels, the luminance is low due to the coating structure of the phosphor, and the phosphor deteriorates severely due to sputtering.
The drawback was that the panels had a short lifespan.

From the above-mentioned viewpoint, the present invention provides an AC-driven gas-driven gas-driven gas generator capable of display color conversion with high brightness and long life by adding an auxiliary discharge cell that excites a phosphor adjacent to each of the discharge cells. The purpose is to provide a discharge display panel.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a sectional view and a plan view showing one embodiment of the present invention, and the same parts as in FIG. 1 are designated by the same reference numerals. In this figure, on the second glass substrate 2 are auxiliary Y electrodes adjacent to and parallel to each electrode of the main Y electrode group 1i (i is a positive integer) corresponding to the Y electrode group 4 (FIG. 1). 2i are arranged. The main electrode 1i and the auxiliary Y electrode 2i have electrode enlarged portions 1ia and 2ia adjacent to the main discharge cell group defined by the intersection of the X electrode 3 and the main Y electrode 1i, respectively.
are provided, and an auxiliary discharge cell is formed between the enlarged portions of both electrodes.

Therefore, sustaining voltage pulses having an opposite phase relationship as shown by VYA and VYB in the driving waveform diagram of FIG. This is the same as the write voltage pulse VX _W applied to the electrode 3, and that of the auxiliary Y electrode 2i is applied at the same timing as the sustain voltage pulse VX _S applied to the X electrode 3. Note that both of the pulses to the X electrode 3 are applied only during the write period T _W and are not applied during the display period T _D. On the other hand, on the surface of the dielectric layer 5 on the first glass substrate 1, both Y
A phosphor 31 is formed facing the electrode.

In relation to FIGS. 2 and 3, for example, time t ₀
Assume that the X electrode 3a and the main Y electrode 11 are selected and information is written. Then, the write voltage pulse VX _W is applied to the X electrode 3a, and the sustain voltage pulse VYA ₁ is applied to the main Y electrode 11, so these pulses are applied as a combined voltage to the main discharge cell at the intersection of these two electrodes. , the first discharge spot occurs. At the next time t ₁ , the auxiliary Y electrode 2
When sustaining voltage pulse VYB _{1 is applied to VYB 1} , since the main Y electrode 11 is at ground potential at this time, both Y
A discharge spot is generated in the auxiliary discharge cell between the electrodes due to the pilot effect of the discharge spot. At this time, since the sustaining voltage pulse _VXS is also applied to the X electrode 11, the main discharge cell again generates a discharge spot. Note that this discharge spot is provided to facilitate and ensure the discharge of the auxiliary discharge cell, and is not absolutely necessary.

The phosphor 31 on the auxiliary discharge cell emits light due to ultraviolet rays or the like from the discharge spot in the auxiliary discharge cell. This light emission mode has high brightness, and in the subsequent display period, both the Y electrodes 11,
This is continued by alternating and repeated sustain voltage pulses applied to 21. In this case, since the phosphor 31 is not directly bombarded with ions from the discharge, there is almost no possibility that its surface will be damaged.

As is clear from the above description, according to the present invention, an auxiliary discharge cell having a surface discharge configuration is added adjacent to the main discharge cell for writing, and the phosphor is excited by the discharge light of the auxiliary cell. With this structure, it is possible to perform color conversion display with high luminance, and it is expected to have great practical effects in that the life of the phosphor can be extended. Therefore, it is extremely advantageous to apply the present invention to, for example, an AC-driven gas discharge display panel for multicolor display.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the structure of an example of a conventional AC-driven gas discharge panel for multicolor display, Fig. 2 is a panel structure diagram showing an embodiment of the present invention, and Fig. 3 explains the operation of the present invention. FIG. 3 is a diagram showing an example of a drive voltage waveform for the purpose of the present invention. DESCRIPTION OF SYMBOLS 1 and 2...Glass substrate, 3...X electrode, 5...Dielectric layer, 6...Discharge gas space, 7 and 31...Fluorescent material, 1i...Main Y electrode, 2i...Auxiliary Y electrode, VX _W ...
Write voltage pulse, VX _S , VYA and VYB...sustaining voltage pulse.

Claims (1)

[Scope of Claims] 1. A gas discharge in which a plurality of X electrodes and Y electrodes each covered with a dielectric layer are arranged on substrates facing each other with a gas discharge space in between, and a main discharge cell is constituted between these two electrodes. In the display panel, parallel auxiliary electrodes 2i are provided on the same substrate 2 adjacent to the one Y electrode 1i, and an intersection with the other X electrode 3 is formed on the opposing surface of these Y electrodes and the auxiliary electrode. electrode enlarged portions 1ia, 2ia are formed at positions avoiding the electrode enlarged portions, an auxiliary discharge cell adjacent to the main discharge cell is constituted between the electrode enlarged portions, and the other substrate 1 facing the auxiliary discharge cell is formed.
A gas discharge display panel characterized in that a phosphor 31 is provided on a side dielectric layer 5.