JP2720285B2 - Gas discharge display panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas discharge display panel for displaying characters, figures, and the like on a display surface of a front substrate. The present invention relates to a gas discharge display panel intended to prevent narrowing.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional gas discharge display panel 50 has a back substrate 54 made of an insulating material such as a flat glass plate having a plurality of strip-shaped cathodes 52 arranged side by side on one surface, and a plurality of back substrates 54 formed on one surface. A front substrate 58 made of a transparent insulating material such as a flat glass and having a band-shaped transparent anode 56
6 are arranged so as to be orthogonal to each other with a predetermined gap therebetween, and the peripheral edges of both substrates are hermetically sealed via a sealing material to form an envelope 60;
A predetermined discharge gas is sealed in the inner space of the envelope 60.

The internal space includes a front substrate-side barrier rib 62 formed on the opposite surface of the front substrate 58 and a rear substrate-side barrier rib 64 formed on the opposite surface of the rear substrate 54.
The discharge cells 66 are formed in a dot matrix at each intersection between the cathode 52 and the anode 56. A spacer 68 is formed on the top surface of the front substrate side barrier rib 62 at a predetermined interval, and the spacer 68 is in contact with the top surface of the rear substrate side barrier rib 64. Therefore, a gap 70 having a width corresponding to the height of the spacer 68 is formed between the front substrate side barrier rib 62 and the rear substrate side barrier rib 64, and the discharge cells 66 communicate with each other via the gap 70. Have been. In FIG. 6, for convenience of illustration, the cross-sectional hatching of the front substrate 58 and the anode 56 made of a transparent material is omitted.

By selectively applying a DC voltage between the anode 56 and the cathode 52, a discharge is generated in a desired discharge cell 66, and light from the negative glow 72 causes the anode 56 and the front substrate 58 to pass through. Transmitted and radiated to the outside. As a result, arbitrary characters, figures, and the like are displayed on the display surface of the front substrate 58. At the time of discharge, the flow of ions between the discharge cells 66 through the gap 70 is ensured.

[0005]

The barrier ribs 62 on the front substrate side are generally formed by printing a glass paste as a material on a surface of the front substrate 58 on which the anode 56 has been formed in advance in a thick film in a lattice pattern. In this case, a so-called “drip” occurs, in which the lower layer portion of the glass paste spreads over a predetermined area along the surfaces of the front substrate 58 and the anode 56. Moreover,
Since the black glass paste is used as the material of the barrier ribs in order to increase the contrast between the discharge cells 66, the sag is formed on the front substrate side barrier ribs 62 by the dripping.
The emission area of each discharge cell 66 is reduced by the increase in the bottom area of the display panel, and the viewing angle as a display panel is reduced.

In particular, as shown in FIG. 7, when the front substrate 58 and the rear substrate 54 are joined, a “position shift” occurs between the front substrate-side barrier rib 62 and the rear substrate-side barrier rib 64.
Occurs, a more serious narrowing of the viewing angle occurs. For example, in FIG. 6 where the positioning of both substrates is good,
When the dot pitch between the discharge cells 66 is set to 0.6 mm, the distance between the anode 56 and the cathode 52 is set to 0.12 mm, and the width of the front substrate side barrier rib 62 is set to 0.2 mm, 50% or more of the total light emission amount is increased. The viewing angle range is about 70 ° on both the left and right sides (about 140 ° in total). On the other hand, in the case of FIG.
Although it slightly widens, the angle range on the left becomes extremely narrow at about 61 °, and stops at about 134 ° in total.

The present invention has been made in view of the above-described drawbacks of the prior art, and is intended to reduce the sagging of the material that occurs when forming the front substrate side barrier ribs and the misalignment that occurs when the front substrate and the rear substrate are joined. An object of the present invention is to realize a gas discharge display discharge panel that can suppress a narrowing of the viewing angle of the display panel due to the reason.

[0008]

In order to achieve the above object, a gas discharge display panel according to the present invention has a plurality of strip-shaped electrodes on one surface of a back substrate made of an insulating material, and partitions between the electrodes. A grid-like rear substrate-side barrier rib provided with a plurality of first partitions and a plurality of second partitions partitioning each electrode at a predetermined length is formed, and on one surface of a front substrate made of a light-transmitting insulating material. A plurality of strip-shaped transparent electrodes, a plurality of first partition walls partitioning between the transparent electrodes, and a plurality of second partition walls separating the transparent electrodes at predetermined lengths; The rear substrate and the front substrate are disposed so as to face each other such that the electrode and the transparent electrode intersect at a predetermined distance, and each of the intersections of the two electrodes is surrounded by the rear substrate-side barrier rib and the front substrate-side barrier rib. To form a discharge cell A gas discharge display panel in which a discharge gas is sealed in the envelope, and the front substrate-side barrier rib is entirely formed of a translucent material. In addition, the rear substrate-side barrier rib is made of a light-shielding material, and is made of a light-shielding material, similarly to the first lattice member located on the rear substrate side.
A second grid member provided on the first grid member and having a partition wall narrower than the partition wall of the first grid member; the front substrate-side barrier ribs being higher than the entire height of the rear substrate-side barrier ribs; A spacer narrower than each partition is formed at the intersection of the first partition and the second partition on the front substrate-side barrier rib, and the spacer contacts the rear substrate-side barrier rib. By contact, a gap corresponding to the height of the spacer is formed between the front substrate side barrier rib and the rear substrate side barrier rib.

[0009]

As described above, by forming the rear substrate-side barrier ribs higher than the front substrate-side barrier ribs, the role of the barrier ribs for partitioning the discharge cells can be largely performed by the rear substrate-side barrier ribs. Even when the entire front substrate side barrier rib is made of a translucent material, the contrast between the discharge cells can be maintained. Then, part of the light generated in the discharge cell passes through the light-transmitting front substrate-side barrier ribs, reaches the front substrate, and is emitted to the outside as it is. That is, it is possible to effectively prevent the viewing angle of the gas discharge display panel from being narrowed due to the material sagging generated when the front substrate side barrier ribs are formed or the positional deviation generated when the front substrate and the rear substrate are joined. In addition, the rear substrate-side barrier rib has a two-layer structure of a first lattice member and a second lattice member, and the second lattice member disposed on the front substrate side has a larger partition wall than the first lattice member. Since the width is configured to be narrow, the rate of obstruction of light propagation by the rear substrate-side barrier ribs having a light-shielding property is reduced, which can contribute to an increase in the viewing angle. Further, since a spacer for forming a gap communicating between the discharge cells is formed on the front substrate side barrier rib,
The gap can also be used as a light traveling path, and has an advantage that the viewing angle can be further increased. This spacer is narrower in width than the partition wall of the front substrate side barrier rib, and is arranged only at the intersection of the first partition wall and the second partition wall. It does not become.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas discharge display panel according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic sectional view showing the first gas discharge display panel 10.
In the first gas discharge display panel 10, a rear substrate 12 made of an insulating material such as a flat glass and a front substrate 14 also made of a transparent insulating material such as a flat glass are opposed to each other with a predetermined gap therebetween. An envelope 16 is formed by hermetically sealing the peripheral edge of the substrate, and Ne, Ar, H
Its basic configuration is to fill a discharge gas mainly composed of a rare gas such as e or Xe.

A plurality of strip-shaped cathodes 18 are formed on the opposite surface 12a of the back substrate 12. This cathode 18
on the surface of the g · Pd cathode substrate made of such a laminate of the emitter material, such as LaB _6, or made of Ni or the like. A rear substrate-side barrier rib 20 is disposed on the facing surface 12a. The rear substrate-side barrier ribs 20 are formed by printing and baking black glass paste on the opposing surface 12 a, and partition a first partition wall 20 a between the cathodes 18.
The cathode 18 has a grid shape including a second partition wall 20b that divides each cathode 18 into predetermined lengths.

As shown in FIG. 2, an NESA film (SnO ₂ ) or an ITO film (In) is formed on the facing surface 14a of the front substrate 14.
_A plurality of strip-shaped anodes 22 made of ₂ O ₃ · SnO ₂ ) are formed. Further, a front substrate side barrier rib 24 made of an insulating material such as glass is formed. The front substrate-side barrier rib 24 has a lattice shape including a first partition wall 24a that partitions between the anodes 22 and a second partition wall 24b that partitions each anode 22 in the length direction. The front substrate-side barrier rib 24 is connected to the front substrate 14 and the anode 22.
A translucent lattice member 24c made of transparent glass,
It is composed of a light-shielding grid member 24d made of black glass connected to the light-transmitting grid member 24c. A spacer 26 formed by printing and firing a glass paste is protrudingly provided at the intersection of the first partition wall 24a and the second partition wall 24b of the front substrate-side barrier rib. In FIG. 1, for convenience of illustration, the cross-sectional hatching of the front substrate 14, the anode 22, and the translucent lattice member 24c made of a transparent material is omitted. The same applies to FIG. 3 described later.

The front substrate-side barrier ribs 24 are formed by applying a transparent glass paste to the opposite surface 14a of the front substrate on which the anode 22 is formed in advance by a thick film printing method in a lattice pattern with a thickness of about 10 μm. It is formed by depositing a black glass paste on the top in a grid pattern with a thickness of about 90 μm, and firing it at about 500 ° C. When this glass paste is subjected to thick film printing, the transparent glass paste in contact with the surfaces of the front substrate 14 and the anode 22 causes sagging to spread along these surfaces.
The translucent lattice member 24c is formed to have a substantially trapezoidal cross section on a surface that contacts the front substrate 14 or the like, and is wider than a surface that contacts the light-shielding lattice member 24d.

The rear substrate 12 and the front substrate 14 are arranged such that a cathode 18 and an anode 22 formed on the respective opposing surfaces are orthogonal to each other with a predetermined gap therebetween, and the front substrate side barrier ribs 24 are provided.
Is positioned so as to contact the intersection of the first partition wall 20a and the second partition wall 20b of the rear substrate side barrier rib, and the peripheral edges of both substrates are made of a sealing material (not shown) such as frit glass. The enclosure 16 is formed by hermetically sealing through the.

In the envelope 16, the first partition 20a and the second partition 20b of the rear substrate-side barrier rib are provided.
The space surrounded by the first partition wall 24a and the second partition wall 24b of the front substrate side barrier rib constitutes the discharge cell 28. This discharge cell 28 is
Many are arranged in a dot matrix. The discharge cells 28 communicate with each other via a gap 30 formed between the front substrate-side barrier rib 24 and the rear substrate-side barrier rib 20 and corresponding to the height of the spacer 26.

When a DC voltage equal to or higher than the discharge starting voltage is applied between the anode 22 and the cathode 18 from a power source (not shown), a discharge is generated in the discharge cell 28, and light having a predetermined emission color is emitted from the front substrate. 14 and is emitted to the outside. By selectively executing this voltage application via a control / drive circuit (not shown), discharge light emission is generated in a desired discharge cell 28 and the display surface 14 of the front substrate 14 is formed.
Arbitrary characters and figures can be displayed on b. In addition,
At the time of discharging, each discharge cell 2 passes through the gap 30.
The circulation of ions between 8 is ensured.

As described above, since the light-transmitting lattice member 24c of the front substrate-side barrier rib is made of transparent glass, light from the negative glow 32 generated in the discharge cell 28 does not pass through the light-transmitting lattice member. 24c through the front substrate 1
Spread to the 4 side. As a result, the viewing angle of the first gas discharge display panel 10 is much larger than when the entire front substrate side barrier rib is made of black glass. For example, when the dimensions of each part are the same as those of the conventional example shown in FIG. 6 (that is, the dot pitch between the discharge cells 28 is 0.6 mm, the distance between the anode 22 and the cathode 18 is 0.12 mm, the front substrate side). In the case where the width of the second partition wall 24b of the barrier rib 24 is set to 0.2 mm), the angle range in which 50% or more of the total light emission amount can be seen is about 76 ° (total about 152 °) on both the left and right in this embodiment. A much better result was obtained than the conventional angle range (about 70 ° on both sides, total about 140 °).

As shown in FIG. 3, when the front substrate 14 and the rear substrate 12 are joined, the front substrate side barrier rib 2
Even if the position shift occurs between the rear rib 4 and the rear substrate-side barrier rib 20, when the dimensions of the respective parts are aligned with those of the above-described conventional example shown in FIG.
About 73 ゜ on the left and about 79 ゜ on the right, totaling about 152 ゜
The angle range of the conventional example (about 61 ° on the left side, about 73 ° on the right side,
Much better results than a total of about 134 °) were obtained.

In general, when a certain display is performed on a gas discharge display panel for a long time, the electrodes in a specific discharge cell are discolored whitish by ion bombardment due to discharge, and the display appears to be prominent even after the lighting is completed. Phenomena occur. However, in this embodiment, since the translucent lattice member 24c is not black but transparent, the other discharge cells 28 also appear whitish due to reflection of external light in the translucent lattice member 24c, and the specific discharge An additional effect is that the whitening produced in the cell is less noticeable.

FIG. 4 shows a second gas display discharge panel 40 according to the present invention. In the second gas discharge display panel 40, a rear substrate 12 made of an insulating material and a front substrate 14 made of a transparent insulating material are arranged to face each other with a predetermined gap therebetween, and the peripheral edges of both substrates are sandwiched via a sealing material. The basic configuration is that the envelope 16 is formed by hermetically sealing, and a predetermined discharge gas is sealed in the internal space of the envelope 16.

A plurality of strip-shaped cathodes 18 are formed on the opposite surface 12a of the rear substrate 12, and a rear substrate-side barrier rib 42 is disposed. The rear substrate-side barrier ribs 42 form first partition walls 42 a that partition between the cathodes 18.
And a second partition wall 42 for partitioning each cathode 18 by a predetermined length.
b. The rear substrate-side barrier rib 42 has a first lattice member 42c located on the rear substrate 12 side, and a narrower width than the first lattice member 42c disposed on the first lattice member 42c. It is composed of a second lattice member 42d, both of which are made of black glass.

As shown in FIG. 5, a plurality of strip-shaped transparent anodes 22 are formed on the facing surface 14a of the front substrate 14, and the front substrate-side barrier ribs 4 made of transparent glass are formed.
4 are formed. This front substrate side barrier rib 44
Has a lattice shape including a first partition 44a that partitions between the anodes 22 and a second partition 44b that partitions each anode 22 in the length direction. In addition, the first of the front substrate side barrier ribs
A spacer 26 made of an insulating material such as glass is protrudingly provided at the intersection of the partition wall 44a and the second partition wall 44b. In FIG. 4, for convenience of illustration, the cross-sectional hatching of the front substrate 14, the anode 22, and the front substrate-side barrier rib 44 made of a transparent material is omitted.

As is apparent from FIG. 4, the second gas discharge display panel 1
The light-shielding grid member 24d constituting the front substrate-side barrier rib 24 at 0 is replaced with the second grid member 42d as it is.
This is characterized in that it is transferred to a constituent member of the rear substrate side barrier rib 42. In this way, by assigning most of the barrier ribs' original function of isolating the discharge cells 28 to the rear substrate-side barrier ribs 42, the entire front substrate-side barrier ribs 44 can be made of a light-transmitting material, The viewing angle of the display panel can be increased accordingly. For example, the angle range in which 50% or more of the total light emission can be seen is as wide as about 79 ° on both the left and right sides, about 158 ° in total, when the dimensions of each part are the same as in the above embodiment.

The present invention is not limited to the above embodiment. For example, although a DC-driven gas discharge display panel has been exemplified above, it is needless to say that the present invention may be applied to an AC-driven gas discharge display panel. Further, the light-transmitting lattice member 24c of the front substrate-side barrier rib in the first gas discharge display discharge panel 10 and the front substrate-side barrier rib 44 in the second gas discharge display discharge panel 40.
May be made of a translucent material instead of a transparent material as described above.

[0025]

In the gas discharge display panel according to the present invention, since the entire front substrate side barrier ribs are made translucent, material sagging occurs when the front substrate side barrier ribs are formed, or the front substrate and the rear substrate are formed. Even when a positional shift occurs during the bonding of the substrates, the progress of the light generated in the discharge cells is not hindered by the front substrate-side barrier ribs, and the narrowing of the viewing angle can be effectively prevented. Further, the rear substrate side barrier rib is configured such that the second lattice member disposed on the front substrate side has a narrower partition wall width than the first lattice member. As a result, the rate at which the progress of light is inhibited is reduced, and the viewing angle can be increased accordingly. Furthermore, since a spacer for forming a gap communicating between the discharge cells is formed on the front substrate side barrier rib, the gap can also be used as a traveling path of light, and the advantage that the viewing angle can be further expanded can be realized. Have.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing one embodiment of a gas discharge display panel according to the present invention.

FIG. 2 is a schematic perspective view showing a front substrate side according to the embodiment.

FIG. 3 is a schematic cross-sectional view showing a state where a positional shift has occurred in the bonding between the front substrate and the rear substrate.

FIG. 4 is a schematic sectional view showing another embodiment of the gas discharge display panel according to the present invention.

FIG. 5 is a schematic perspective view showing a front substrate side according to the embodiment.

FIG. 6 is a schematic sectional view showing a conventional example.

FIG. 7 is a schematic sectional view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 10 first gas discharge display panel 12 rear substrate 14 front substrate 16 envelope 18 cathode 20 rear substrate-side barrier rib 22 transparent anode 24 front substrate-side barrier rib 24c light-transmitting lattice member 24d light-shielding lattice member 26 spacer 28 discharge cell 30 Gap 40 Second gas discharge display panel 42 Rear substrate side barrier rib 44 Front substrate side barrier rib

Claims (1)

(57) [Claims] 1. A plurality of strip-shaped electrodes and a plurality of first partition walls partitioning between the electrodes on one surface of a back substrate made of an insulating material.
And a plurality of second partition walls separating each electrode at a predetermined length.
In addition to forming a lattice-shaped barrier rib on the old surface substrate provided with a plurality of
A strip-shaped transparent electrode and a plurality of first electrodes partitioning between the transparent electrodes;
A plurality of second partitions that partition the partition and each transparent electrode at predetermined lengths
A grid-like front substrate-side barrier rib having a partition wall is formed, and the rear substrate and the front substrate are disposed so as to face each other so that the electrode and the transparent electrode intersect at a predetermined distance. A gas formed by forming a discharge cell surrounded by a rear substrate-side barrier rib and a front substrate-side barrier rib, forming an envelope by hermetically sealing the peripheral edges of both substrates, and enclosing a discharge gas in the envelope. In the discharge display panel, the front substrate-side barrier rib is entirely made of a translucent material.
And the rear substrate-side barrier rib is made of a light-shielding material.
A first grid member formed of a material and located on the rear substrate side;
It is also made of a light-shielding material, and is formed on the first lattice member.
The arranged partition wall having a width smaller than that of the first lattice member.
The front substrate side burr
The ribs are lower than the height of the rear substrate side barrier ribs.
A first partition wall and a second partition wall of the front substrate side barrier rib.
At the intersection with the bulkhead, a space narrower than each bulkhead
The spacer is formed on the rear substrate side barrier layer.
Contacting the front board side barrier ribs and the back
Equivalent to the above spacer height between the substrate side barrier ribs
Gas discharge table characterized by the formation of a closed gap
Panel.