JPS5979938A - Gas discharge panel - Google Patents

Abstract

PURPOSE:To further reduce the cost without impairing the long life of a face discharge-type gas discharge panel by exposing the surface of writing electrodes arranged on a dielectric layer to a gas discharge space. CONSTITUTION:Discharge sustaining electrodes 32, 33 with adjacent and paired comb tooth sections 32a, 33a are arranged face to face on a lower glass substrate 31 functioning as an electrode support substrate so that individual comb tooth sections 32a, 33a are closely faced each other, and discharge sustaining cells Sc are constituted with individual comb tooth sections 32a, 33a. Writing electrodes 35 are arranged on them through a thick dielectric layer 34 made of low-melting point glass in a direction crossing the discharge sustaining electrodes 32, 33, and writing discharge cells Wc are constituted corresponding to each intersection with one discharge sustaining electrode 32, for example of the discharge sustaining electrodes 32, 33 respectively. The dielectric layer 34 arranged with writing electrodes 35 is exposed to a gas seal gap 37 or coated with only a surface layer 36 such as a thin secondary electron highly-emitting material as shown in the figure.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical field of the invention The present invention relates to improvement of a display panel using gas discharge,
In particular, it relates to a new Banelto 19 structure that aims to reduce the cost and extend the life of straight-face gas discharge panels.

(b) Background of the technology A type of gas discharge panel known as a plasma display panel is a surface-radial display panel.
. This type of gaff discharge, pile, emits electrons I only on the (one of the plates)^ plate of the pair t + r, L, t arranged in the evening j through the space containing the tortoise dregs. Since the pupil is arranged in such a way that the pupil is covered by 1.°j, the opening angle into the gas-filled space between the pair of substrates is In addition to significantly relaxing the requirements for temperatures of 1 and 11 degrees, an ultraviolet-excited phosphor is installed on the inner surface of the cover substrate of the above-mentioned ↑IL cell. -The advantage is that multicolor fluorescent display can be easily made (T).

However, on the other hand, the iif tM that forms gold in the emissive cell is d
Since it is a tj4 formation buried in the Hideju body layer, u+!
! There are various problems that arise in the above works, as well as in the works of YiX and 'li!+.

Prior art and problems: In the conventional surface-emitting 1'ii type gas discharge panel described above, one of the pair of substrates 1q is placed facing each other through a gas-filled space using the Al7III technique. J,
(Y'r [5 poles and X11 are arranged through the dielectric layer so that the poles intersect with each other, and on top of the In the case of a panel μ structure with a gap il, the surface of which is covered with a surface layer of MgO, the XYN during discharge operation Current concentration occurs at the edge of both electrodes at the polar intersection, locally heating the nearby dielectric layer and surface layer, causing local thermal alteration or recrystallization, and in some cases cracks, etc. There were disadvantages such as fluctuations in voltage, decrease in withstand voltage, and shortened lifespan.Also, in order to suppress thermal damage to the dielectric layer due to local concentration of the above-mentioned dielectric current, the dielectric layer was made with a low melting point. Attempts have been made to thicken the film using glass or the like, but in this case, for example, an X[pole is disposed on the dielectric layer made of low melting point glass on the electrode,
Furthermore, during the firing process when forming a dielectric layer made of low-melting point glass, the dielectric layer between the X and Y electrodes softens and flows, causing short-circuits or disconnections between the X and Y electrodes at the intersection. There were drawbacks that occurred. In order to further improve this problem, a panel has been proposed, for example, as shown in the plan view of the electrode arrangement in FIG. 1 and the sectional view of the main part of the panel in FIG.

In this case, a discharge sustaining electrode 2 having a pair of adjacent comb-teeth protrusions 3a, 3a on one of a pair of substrates 1 and 9 facing each other with a predetermined gas discharge space 8 in between.
．． As shown in the figure, a discharge sustaining cell/l/SO is constituted by the comb tooth protrusions 2a and 3a which face each other in close proximity. Further, on the upper surface thereof, a writing pole is provided in a direction intersecting the discharge sustaining electrode 2.3 through a first dielectric layer 4 made of a low melting point glass mainly composed of PbO.

Further coated thereon is the second electrical layer 6 made of alumina (AJ20a) and a surface layer 7 made of ■○. and one of the discharge sustaining electrodes, for example 2
A write discharge cell /l/W (3) is configured corresponding to each intersection of the write electrode 5 and the write electrode 5, and the selected write discharge cell /l/W
The discharge at l/We is applied to the adjacent discharge sustaining electrode Sc.
The discharge cell 1v is functionally separated so as to maintain the discharge continuously in the discharge sustaining cell Sc, thereby preventing current concentration from occurring on the opposing electrode in the discharge sustaining cell Sc. On the other hand, regarding the write discharge cell and Wc, the same crossing '! [Because of this structure, when discharging, local current concentration occurs as in the conventional case, but since the frequency of write discharges is lower than the frequency of sustaining discharges, the write cell can be activated only by such write discharges. The second dielectric layer 6 of the /1/WQ layer is less likely to be damaged, but it is also desired to reduce the cost without impairing its longevity.

(7) Purpose of the Invention In view of the above-mentioned conventional circumstances, the present invention provides a novel surface discharge type gas discharge spring Iv which aims to further reduce the cost without impairing the longevity of the surface discharge type gas discharge panel. (e) Arrangement of the Invention According to the present invention, on one of a pair of substrates facing each other with a predetermined gas discharge space in between, In a panel configuration comprising a plurality of adjacent discharge sustaining electrodes, each of which forms a pair, and a write electrode arranged thereon in a direction intersecting the discharge sustaining electrodes with a dielectric layer interposed therebetween, the dielectric layer A gas discharge spring tLk characterized in that the surface of the write electrode arranged above is exposed to a gas discharge space.
This is achieved by providing

``) Embodiments of the Invention Embodiments of the present invention will be described in detail below with reference to the drawings.

FIGS. 3 and 4 are a plan view and a sectional view of an important part of an electrode arrangement showing an embodiment of a gas discharge spring according to the present invention. As is clear from these figures, the comb teeth portions 32a are arranged in pairs adjacent to each other on the lower glass substrate 31 functioning as an electrode support substrate.

Discharge sustaining electrodes 32 and 33 having comb teeth 82a and 33a are made of, for example, thin films of chromium (Or), M (Cu) and chromium (
A three-layer electrode structure made of Cr) is arranged as shown in the figure, and a discharge sustaining cell Sc is constituted by the comb teeth portions 32a and 33a arranged opposite to each other. On the upper surface thereof, a thick dielectric layer 34 made of low melting point glass mainly composed of Pb0t is interposed, and in a direction intersecting the discharge sustaining electrodes 32 and 33, for example, thin chromium (Or), p<Cu. ) and y
c+ Mu (Cr) 3-layer structure writing N, pole 3
5 are arranged, and a writing cell 1/5 is provided corresponding to each intersection between one of the discharge sustaining electrodes 32, 33, for example, 32 and the write electrode 35.
It constitutes WQ. The top of the dielectric layer 34 on which the write electrode 35 is disposed is exposed to the gas filling gap by eliminating the conventional cladding tube of the second dielectric layer, or is made of CaO as shown in the figure. Only a surface layer 86, such as a thin high secondary electron emitting material made of an alkaline earth metal oxide such as MgO, is coated.

Furthermore, a galanic substrate 38 for a cover is sealed with a predetermined gas filling gap 37 in opposition to the electrode substrate structure configured in this manner, and in the gap 37, for example, xenon (X
e) A discharge gas consisting of helium (He) gas containing 1% gas is sealed. However, to explain the discharge operation of the gas discharge panel configured in this way, as is clear from the voltage waveform diagram in FIG. , X'78
A voltage waveform indicated by g is applied. The voltage wave height at this time is, for example, -VS=150V. On the other hand, the write electrode 35 is normally applied with .largecircle.■. When a positive polarity voltage waveform indicated by Yvw, for example +vw=5Qv, is applied to the write polarization 35 during writing, mJ is applied to the discharge sustaining electrode 35.
A voltage of 200 cm is applied between the write electrode 35 and the write electrode 35, and a write discharge is generated in the write cell WC near the intersection of these electrodes. At this time, the writing ``pole'' provided exposed to the gas filling gap 37 or semi-exposed by the surface layer 36 has a positive polarity, so it will not be destroyed by ion bombardment. .

This write discharge causes the dielectric layer 3 corresponding to the write cell WQ to
With the generation of wall charges on the surface of the dielectric layer 34, the wall charges are accumulated extending to the surface of the dielectric layer 34 corresponding to the adjacent discharge sustaining cell Sc. Therefore, since a discharge sustaining voltage has already been applied between the pair of discharge sustaining electrodes 32 and 33 constituting the discharge sustaining cell n'sQ, the writing discharge IIk continues in the discharge sustaining cell/sc due to the wall charge. In this way, discharge is induced and continues. After that, it will take a while
f, to erase one stray fiber f'# lightning, -V to pole 32
This is done by applying a narrow varnu of s.

In addition, in the above-mentioned embodiment, an example was explained in which the uppermost part of the writing W was exposed or covered with a surface layer made of an alkaline earth metal oxide such as JO. For example, lanthanum hexaboride (L
It may also have a structure in which a surface layer made of aBa) or the like is coated.

@) Effects of the Invention As is clear from the above explanation, the structure of the gas discharge spring according to the present invention allows the conventional writing electrode to be coated without impairing the discharge characteristics and longevity of the panel. Since the structure eliminates the second dielectric layer that had previously been used, it is possible to manufacture the spring /l/ with very high yield and low cost using thick film techniques, Since the memory space is separated by the exposed write electrode, there is an advantage that the write voltage can be made very low and the operating voltage range can be widened. Therefore, it is not limited to this type of surface discharge type gas discharge panel described in this embodiment, but also a color surface discharge type gas discharge panel that utilizes fluorescent light emission in which an ultraviolet-excited phosphor or the like is attached to the inner surface of a glass substrate for a cover. It is extremely advantageous when applied to panels.

[Brief explanation of the drawing]

1 and 2 are a plan view of the electrode arrangement and a sectional view of the main part of the panel to explain a conventional surface discharge type gas discharge panel, and FIGS. 8 and 4 are surface discharge type gas discharge panels according to the present invention. A plan view of the electrode arrangement showing one embodiment of the spring 7, a sectional view of the main part of the spring μ, and FIG. 5 are diagrams showing one embodiment of the discharge drive voltage waveform. In the drawing, 31 is a lower glass substrate, 32, 33 is a discharge sustaining electrode, 32a and aaa are comb teeth, 34 is a dielectric layer, 85 is a write electrode, 36 is a surface layer, 37I is a gas filling gap, and 38 is a Upper glass substrate, Sc is a discharge holding cell,
Wc is the write value) v′? :show. Figure 1 2 20 '3Q 3 Figure 3 Figure 4

Claims (1)

[Claims] On one substrate of a pair of substrates facing each other with a gas discharge space in between, a pair of discharge holding electrodes with a Neri number adjacent to each other and a dielectric layer all over the valve I7 are placed on one of the substrates to support the discharge. Maintain N, Gokuraku in 1 box of writing arranged in the cross direction? In the panel structure comprising gas discharge springs V6 arranged on the dielectric layer, the surfaces of the poles are exposed to the gas discharge area 1F.