JPH03179635A - Gas discharging type display device - Google Patents

Abstract

PURPOSE:To simplify the constitution of a gas discharge type display device and its control by covering a part of a cathode electrode with a dielectric layer and causing a trigger discharge between the part of the cathode electrode covered by the dielectric layer and a part of another adjacent cathode electrode not covered by the dielectric layer. CONSTITUTION:A dielectric layer 13 for covering a part of a plurality of cathode electrodes 12 is provided as well as a control circuit for controlling voltage applied to an anode electrode 16 and the cathode electrodes 12 is provided. In this case a trigger discharge giving a pilot effect to a discharge between the cathode electrodes 12 and the anode electrode 16 is caused between the part of the cathode electrode 12 covered by the dielectric layer 13 and a part of another cathode electrode adjacent to the cathode electrode 12 not covered by the dielectric layer 13. Thus a trigger electrode exclusively for the purpose is not needed while a trigger discharge can be caused with a simple constitution and control.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a direct current discharge type plasma display panel (D
The present invention relates to a gas discharge type display device such as a C-PDP (C-PDP), and specifically relates to a trigger discharge that provides a pilot effect.

[Conventional technology]

In conventional PDPs of this type, auxiliary discharge cells were provided to provide a pilot effect to the display discharge cells in order to reduce unevenness in brightness due to variations in discharge delay time. There is a problem in that the area occupied by the display discharge cells with respect to the display surface becomes small.

A proposal to solve this problem is given in the Technical Report of the Television Society of Japan, IPD 109-1, (Sho 6l-8-5), Noriyuki Awaji et al., "Analysis of discharge characteristics of trigger discharge type DC-PDP," p. 1-6. Figure 2 is a perspective view showing the inside of the PDP shown in this proposal, and Figure 3 (
a) to (C) are explanatory diagrams for explaining the operation of the PDP (the left side of the figure shows the state at the point of the dashed dotted line on the right side of the figure).

As shown in FIG. 2, this PDP has a back glass 1
A trigger electrode 3 covered with a dielectric material 2 is disposed on top, and a cathode electrode 4 is formed on the surface thereof.

On the other hand, on the front glass 5 there is a cathode voltage fl! Anode electrode igi extending in a direction perpendicular to 4! 6 and a partition wall 7 are formed. The back glass 1 and the front glass 5 are made to face each other with a predetermined distance therebetween, and their surroundings are sealed and a discharge gas is filled in.

Here, the PDP has a cathode voltage i#! The image is displayed by emitting light due to the discharge between the anode te6 and the anode te6, but variations in the discharge delay time are prevented by the pilot effect caused by the trigger discharge. As shown in FIG. 3(a), this trigger discharge inverts the polarity of the potential Vt of the trigger electrode 3 to accumulate positive charges on the dielectric 2, and as shown in FIG. , which holds a positive charge, is generated between the surface of the dielectric 2, which holds a positive charge, and the cathode electrode 4 by changing the potential Vc1 of the power terminal electrode 4 from the bias to OV, as shown in FIG. , Va2, and Va3 are the potentials of the other cathode electrodes, and Va is the potential of the anode electrode 6.

[Problem to be solved by the invention]

However, in the conventional example shown in Fig. 2, in addition to the cathode electrode and the anode electrode, a dedicated trigger electrode for trigger discharge is provided, so a driving pulse must be applied to each of the three types of electrodes. , and the control becomes complicated.

Therefore, the present invention has been made to solve the problems of the prior art as described above, and its purpose is to:
An object of the present invention is to provide a gas discharge type display device that can generate a trigger discharge through simple construction and control.

[Means to solve the problem]

A gas discharge type display device according to the present invention includes a first substrate, a plurality of cathode electrodes provided on the first substrate,
a second substrate disposed opposite to the first substrate; and a plurality of anode electrodes provided on the second substrate opposite to the cathode electrode, the cathode electrode and the anode A gas discharge type display device that displays an image by discharge light emitted between electrodes, further comprising a dielectric layer that covers a portion of the plurality of cathode electrodes, and a portion of the cathode electrode covered with the dielectric layer. , to generate a trigger discharge that gives a pilot effect to the discharge between the cathode electrode and the anode electrode between the cathode electrode and a portion of another cathode electrode adjacent to the cathode electrode that is not covered with the dielectric layer. and a control circuit for controlling voltages applied to the anode electrode and the cathode electrode.

[For production]

In the present invention, a part of the cathode electrode is covered with a dielectric layer, and a portion of the cathode electrode covered with the dielectric layer and an adjacent portion of the other cathode electrode that is not covered with the dielectric layer are separated. An AC discharge (trigger discharge) is generated between the cathode electrode and the anode electrode, and the excited gas floating in the space by the trigger discharge provides a pilot effect for the discharge light emission between the cathode electrode and the anode electrode.

〔Example〕

The present invention will be explained below based on illustrated embodiments.

FIGS. 1(a) and 1(b) show an embodiment of a gas discharge type display device according to the present invention, and FIG. 1(a) is a cross-sectional view,
FIG. 5B is a plan view of the configuration on the rear glass side.

As shown in Figures (a) and (b), in this embodiment, cathode electrodes 1 made of Ni are arranged on a back glass (first substrate) 11 at a constant pitch (for example, 0.5 mm).
2 are provided. A cathode electrode 'lf! extends in the same direction as the cathode electrode 12 on the rear glass 11.
A dielectric layer 13 covering a portion of 12 is provided. Further, a protective layer 14 made of MgO or the like is provided on the dielectric layer 13 to suppress sputtering of the dielectric layer 13.

Here, the cathode electrode 12 is made of Ni paste (for example, D
The dielectric layer 13 is formed with a thickness of 15 to 20 μm by a thick film printing method using IJpOnt Co., Ltd., product number: 9535), and the dielectric layer 13 is made of PbO2-based paste (for example, Flecrto
-3science-1-aboratories IN
It is formed to a thickness of 5 to IO μm by a thick film printing method using a film manufactured by C., Inc., product number: 4014B). In addition, protective layer 1
4 is formed by a vapor deposition method to have a Jl thickness of 0.5 to 1.0 μm.

Although not shown in the figure, partition walls extending in a direction perpendicular to the cathode electrode 12 are formed on the rear crow 11 at a constant pitch (for example, 0.5 mm). Here, the partition wall is formed by printing a thick film of paste (for example, manufactured by DuPont, product number: 9741), for example, with a width of 100 mm.
.mu.m and height of 200 .mu.m.

On the other hand, as shown in FIG. 2A, a front glass 15 is provided to face the back glass 11, and a surface of the front glass 15 facing the rear glass 11 has a direction perpendicular to the cathode electrode 12. Multiple anode electrodes extending to %
1.6 are provided at a constant pitch (for example, 0.5 mm). Here, the anode electrode 16 is a transparent conductive film such as ITO formed by a vapor deposition method, and has a width of, for example, 30 mm.
It is formed to have a thickness of about 0.0 μm and a thickness of about 0.2 μm.

Further, an airtight space is formed between the back glass 11 and the front glass 15, and a Ne-Ar Penning mixed gas is sealed in the space.

Then, a control circuit (not shown) controls the cathode "ttf".
A predetermined voltage is applied to i 12 at a predetermined timing, and a predetermined voltage is applied to the anode electrode @ 16 based on the printed data, causing discharge light emission between the cathode tti 12 and the anode electrode 16. .

FIGS. 4(a) to 4(f) are explanatory diagrams for explaining the operation of this embodiment. Further, FIG. 5 is a timing chart showing the potential of each electrode when performing the operation shown in FIG. 4.

Here, from period a to FIG. 5, each of FIG. 4(a)
The potentials from (f) to (f) are shown. In addition, in FIGS. 4 and 5, A is an anode electrode, K1, K2, K
3 and 4 are cathode electrodes, ■ is a dielectric, and VFl
is the potential of anode electrode A when data is available (high potential)
, ■ indicates the potential of the anode electrode @A (low potential) in the case of no data, +VK, O and -VK indicate the potentials applied to the cathode electrode.

Here, a case will be described in which the liquid crystal panel has the following characteristics. Regarding the starting potential of the main discharge,
When a pilot effect is given by a trigger discharge, the main discharge does not occur when the potential difference V8 between the anode electrode and the cathode electrode is V, 10 V, and the main discharge occurs when the potential difference V8 is VH+V. Regarding trigger discharge,
It has a characteristic that a trigger discharge does not occur when the potential difference 1 between adjacent cathode electrodes is VK, and a trigger discharge occurs when the potential difference V1 is 2 VK. Furthermore, in order to prevent the main discharge from occurring during the trigger discharge, the condition is set such that VK<Vl (from 2VK<VL+VK).

The operation of the above embodiment will be explained below based on FIGS. 4 and 5.

First, in Fig. 4(a), 1 and 2 are placed on adjacent cathode electrodes.
This shows the state in which a trigger discharge occurs between the At this time, the potential of the anode electrode A is V4, the potential of the cathode electrode 1 is +Vk, the potential of the canode electrode K is -V, and the potential difference V1 between the cathode electrodes K and K is 2Vk, so equation (2) is satisfied, and a trigger discharge occurs. However, since the dielectric material (1) is adhered to one side of the cathode electrode on the surface of the cathode electrode K, the trigger discharge becomes an AC discharge and ends within 1 μs.

At this time, positive charges are accumulated on the surface of the dielectric 0 on the cathode electrode 2, and excited gas G is suspended in the space between the cathode electrodes 1 and 2. Also,
At this time, the potential of the anode electrode A is V, so the formula (
1>, no main discharge occurs between the anode electrode and the cathode electrode.

Next, in FIG. 4(b), cathode electrodes K and K
The potentials of the two electrodes are -vk, the potential of the quadratic electrode 2 is 0■, and the potential of the anode electrode A is set to VH in the data-on state. At this time, between the cathode electrode 1 and the anode electrode A, the formula (1>
Due to this, main generation 'ED' occurs. :i, 3 on the cathode electrode
Between the electrode A and the anode electrode A, no main discharge occurs because there is no priming effect due to the trigger discharge.

In Fig. 4(c), the cathode electrodes are kept at potentials 1 and 3 at -VK, and the cathode electrodes are kept at potential 2 at +VK.
The potential of the anode electrode iA is set to Vl to cause an AC discharge within lμS between 1 and 2 at the cathode electrode, and the surface of the dielectric material 2 on the cathode electrode 2 is charged with a negative charge. This is to make it easier to cause discharge at the time of the next trigger discharge.

At the same time, a trigger discharge occurs between the cathodes To'iE' K 2 and 3, and the cathode voltage % K
The surface of the electrode 3 is positively charged, and the excited gas G floats in the space between the cathode electrode K 2 and the electrode 3, creating a state in which a priming effect is produced.

In FIG. 4(d), the potentials of 1 and K at the cathode electrode are OV, and the potential of 2 at the cathode electrode is -V.

Here, when the potential of the anode taA becomes VH, the cathode electrode near 2 is in a state where discharge is likely to occur due to the priming effect, so a main discharge occurs according to equation (1).

In FIG. 4(e), the potential of 2 and K at the cathode electrode is -VK, the potential of 3 at the cathode electrode is set to +VK, and the anode voltage [! Let the potential of A be V.

At this time, the cathode voltage 'tl K is AC between 2 and 3.
A discharge occurs and the discharge is terminated instantaneously.
The surface of the dielectric I is positively charged.

In FIG. 4(f), the potentials of the cathode electrodes 2 and K are OV, the potential of the cathode electrode 3 is -VK, and the potential of the anode electrode A is 1-. At this time, a plumming effect is applied to the cathode electrode 3, but
Since the anode potential is 1, no main discharge occurs.

As described above, in this example, a part of the cathode electrode is covered with a dielectric layer, and a part of the cathode electrode covered with the dielectric layer is covered with a dielectric layer of another cathode electrode adjacent to the part of the cathode electrode. It is possible to display an image by generating a trigger discharge between the uncovered area and the cathode electrode and the anode electrode, so it is necessary to provide an auxiliary discharge space, a trigger electrode, etc. Therefore, the configuration and control can be simplified.

〔Effect of the invention〕

As explained above, according to the present invention, a part of the cathode electrode is covered with a dielectric layer, and a part of the cathode electrode covered with the dielectric layer is covered with a dielectric layer of another cathode electrode adjacent thereto. A trigger discharge is generated between the uncovered portion, and this trigger discharge causes a discharge between the cathode electrode and the anode electrode to display an image.
There is no need to provide an auxiliary discharge space, a trigger electrode, etc., and the configuration and control can be simplified.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are a sectional view and a plan view showing an embodiment of a gas discharge type display device according to the present invention, and FIG. 2 is a conventional P
A perspective view showing the inside of the DP, Figures 3 (a> to (c)) are explanatory diagrams for explaining the operation of this PDP, and Figures 4 (a> to (f) show the basic operation of this embodiment. Explanatory diagram, FIG. 5 is a timing chart showing the potential of each electrode when performing the basic operation shown in FIG. 4. 11... Rear glass (first substrate) 12... Cathode electrode 13... Dielectric layer 14... Protective layer 15... Front glass (second substrate) 16... Anode electrode patent patent Oki Electric Industry Co., Ltd.

Claims (1)

[Claims] A first substrate; a plurality of cathode electrodes provided on the first substrate; a second substrate disposed opposite to the first substrate; and a second substrate opposite to the cathode electrode. and a plurality of anode electrodes provided on the second substrate on the side where the display is performed, the gas discharge type display device displaying an image by discharge light emission between the cathode electrode and the anode electrode, A dielectric layer is provided that covers a part of the cathode electrode, and the portion of the cathode electrode covered with the dielectric layer and the portion of the other cathode electrode adjacent to this cathode electrode that is not covered with the dielectric layer. and a control circuit for controlling the voltage applied to the anode electrode and the cathode electrode so as to generate a trigger discharge that gives a pilot effect to the discharge between the cathode electrode and the anode electrode. A gas discharge display device characterized by: