JP2628254B2 - 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, and more particularly to a gas discharge display panel devised so as to obtain a high-luminance display with a desired emission color.

[0002]

2. Description of the Related Art Conventionally, there is a gas discharge display panel shown in FIG. This gas discharge display panel 21
A plurality of rows of strip-shaped cathode electrodes 23 made of nickel paste or the like are formed on a rear substrate 22 made of an insulating material such as a flat glass, and holes 2 are formed on the cathode electrodes 23 vertically and horizontally.
A white barrier 24 made of an insulating material such as glass with perforations 4a is provided. Further, on the upper surface of the barrier 24,
The anode plate 25 made of an insulating material such as glass having an anode electrode 26 formed by nickel plating or the like having an aperture 25a corresponding to the aperture 24a and passing through a row of the apertures 25a on the back surface is connected to the cathode electrode 23. And the anode electrode 26 intersect with each other. The hole 24 is located above the anode plate 25.
A front substrate 28 on which a phosphor layer 27 made of a fluorescent substance is formed is disposed at a position corresponding to a and 25a. Further, the peripheral portions of the back substrate 22 and the front substrate 28 are hermetically sealed to form a hermetic container, and an ultraviolet radiation gas is sealed in the hermetic container to form the gas discharge display panel 21.

In this conventional gas discharge display panel 21, when a predetermined DC voltage is applied between a vertically opposed cathode electrode 23 and an anode electrode 26, a discharge is generated in a discharge cell surrounded by a barrier 24. Emits ultraviolet light. The ultraviolet light excites the fluorescent substance in the phosphor layer 27 formed on the front substrate 28 to generate colored light corresponding to the type of the fluorescent substance. The light is transmitted through the substrate 28 and emitted to the front.

[0004]

However, in the conventional gas discharge display panel 21 described above, the colored luminescence generated by the discharge is transmitted to the front surface through the translucent phosphor layer 27. As a result, there has been a problem that the bright luminescent color changes to a dull color, a desired suitable luminescent color cannot be obtained, and the luminance also decreases.

Therefore, the present invention solves the above-mentioned problems of the conventional gas discharge display panel, and obtains a desired emission color according to the kind of the fluorescent substance and obtains a display with extremely high brightness. And a gas discharge display panel.

[0006]

In order to achieve the above-mentioned object, a gas discharge display panel according to the present invention has a structure other than a tip portion.
A column-shaped discharge electrode whose part is insulated and whose tip portion is subjected to discharge is made to correspond to the column-shaped discharge electrode on the upper surface of the rear substrate formed by forming a plurality of rows of cathode electrodes erected at intervals. A spacer having a hole formed by applying a light reflecting layer and a phosphor layer covering the light reflecting layer on the inner wall and increasing the hole diameter upward; A front substrate, on which a plurality of rows of anode electrodes are formed so as to form a discharge cell so as to form a discharge cell by interposing the columnar electrode and a discharge gap and intersecting the cathode electrode above a spacer, is disposed between the front substrate and the rear substrate. The outer peripheral portion is hermetically sealed to form an airtight container, and a discharge gas mainly composed of an ultraviolet radiation gas is sealed in the airtight container.

[0007]

A columnar discharge electrode is provided on the upper surface of a rear substrate, which is formed by forming a plurality of columns of cathode electrodes having a plurality of standing electrodes arranged at intervals with a plurality of columns being insulated from other portions except for a tip portion and having a tip portion provided for discharge. A hole formed by forming a light reflecting layer and a phosphor layer covering the light reflecting layer on the inner wall and increasing the hole diameter in the upward direction. And a front substrate on which a plurality of rows of anode electrodes are formed above the spacers so as to form a discharge cell with the columnar electrodes separated from the discharge gap and intersecting with the cathode electrodes. An airtight container is formed by hermetically sealing the peripheral portions of the front substrate and the rear substrate, and a discharge gas mainly composed of an ultraviolet radiation gas is sealed in the airtight container. Apply a predetermined voltage during When the discharge is generated between the tip portion and the anode electrode of the columnar discharge electrode, the ultraviolet from the tip portion near the columnar discharge electrode is emitted in all directions of the discharge cell. As a result, the ultraviolet light excites the phosphor layer on the inner wall of the spacer hole as a whole to generate high-luminance light of a desired emission color according to the type of the phosphor layer, The light leaking to the back surface is reflected by the light reflecting layer formed inside the phosphor layer, and is efficiently emitted to the front surface without leaking toward the back substrate, so that a very high quality display can be obtained.

[0008]

1 is an exploded perspective view of a main part of a gas discharge display panel of the present invention, and FIG. 2 is a schematic sectional view of a main part of the gas discharge display panel of the present invention.

In FIG. 1, reference numeral 1 denotes a gas discharge display panel of the present invention, and 2 denotes a rear substrate made of an insulating material such as a flat glass. Silver, silver / palladium, aluminum, nickel or the like having a thickness of about 10 μm is formed on the upper surface thereof. Thus, the cathode electrode 3 is formed by applying a thick film printing in a plurality of rows of strips. Reference numeral 4 denotes an emitter material which is provided on the surface of the strip-shaped cathode electrode 3 at a predetermined interval, and is made of, for example, a mixture of LaB ₆ and BaAl ₂ O ₄ , or the emitter material having a thickness of 50 to 60 μm at the upper end. This is a columnar discharge electrode made of molybdenum, tungsten, nickel or the like and having a diameter of about 0.2 mm and a height of about 0.3 mm. The columnar discharge electrode 4 is covered with an insulating coating 5 except for a tip portion 4a used for discharge. Then, a barrier 6 made of a transparent dielectric material having a thickness of about 20 μm is formed on the surface of the back substrate 2 and the cathode electrode 3 excluding the columnar discharge electrode 4, except for the tip portion 4 a of the columnar discharge electrode 4. In such a manner that no discharge occurs.

Reference numeral 7 denotes an insulating material such as thin glass having a thickness of about 0.3 mm on the upper surface of the back substrate 2 and the cathode electrode 3.
This is a spacer formed by stacking a plurality of sheets. Then, ₁ from the rear substrate 2 side 7, 7 _2, 7 ₃ each spacer disposed in this order, vertically and horizontally corresponding to the arrangement intervals of the columnar discharge electrodes 4, each substantially circular hole 7 ₁ a , 7 by drilled by ₂ a, 7 ₃ gradually expanding the pore size to a etching process or the like, a hole 7 ₁ a, 7 ₂ a, 7 ₃ a hole 7a which is formed to communicate with the The diameter of the hole is increased in a substantially mortar shape upward.

The inner walls of the holes 7 ₂ a and 7 ₃ a of the holes 7 ₁ a, 7 ₂ a and 7 ₃ a have a mirror-like light reflecting layer formed by vapor deposition of a metal such as aluminum or nickel. 8 was deposited and formed, and the light reflecting layer 8 and the hole 7 ₁ a surface of, that consist Hotaruko material into the hole 7a entire surface fluorescent body layer 9
Is formed. The phosphor layer 9 is composed of a phosphor layer that emits red light upon irradiation with ultraviolet light, a phosphor layer that emits blue light, and a phosphor layer that emits green light, and these are formed in an appropriate pattern. The arrangement configuration enables color display in the gas discharge display panel 1 of the present invention. The light reflecting layer 8 is not adhered to the inner wall of the hole 7 ₁ a because the light reflecting layer 8 which is a good conductor is electrically connected to the cathode electrode 3 or the columnar discharge electrode 4. This is because a suitable discharge cannot be obtained due to the occurrence of a discharge location other than the above.

Reference numeral 10 denotes a front substrate made of an insulating material such as a flat glass. The front substrate 10 has a NESA film (SnO ₂ ) or an ITO film (In ₂ O _3.
An anode electrode 11 made of a transparent conductive film such as SnO ₂ ) is deposited. Then, this anode electrode 11 is
The front substrate 10 is disposed above the spacer 7 with a spacer (not shown) interposed between the front end portion 4a of the columnar electrode 4 and the cathode electrode 3 with a discharge gap therebetween. Is sealed with a sealing material such as low-melting glass to form an airtight container. The space surrounded by the hole 7a, the back substrate 2, and the front substrate 10 becomes the discharge cell 12. While exhausting from an exhaust pipe provided in this hermetic container, helium, a discharge gas mainly composed of an ultraviolet radiation gas mainly composed of a rare gas such as a simple gas or a mixture of xenon and the like is sealed, and then the exhaust pipe is sealed off.
Thereby, the gas discharge display panel 1 is completed.

In the gas discharge display panel 1 having such a configuration, when a predetermined voltage is applied between the cathode electrode 3 and the anode electrode 11, the tip portion 4a of the columnar discharge electrode 4 and the anode electrode 11 As a result, a discharge is generated in the discharge gap between the discharge cells 12, and ultraviolet rays are radiated in all directions of the discharge cells 12 from the vicinity of the tip portion 4 a of the columnar discharge electrode 4. As a result, the ultraviolet light excites the phosphor layer 9 on the inner wall of the spacer hole portion 7a as a whole, so that a high-luminance light emission of a desired emission color according to the kind of the phosphor layer 9 occurs, and light reflection occurs. The light including the light reflected by the layer 8 is efficiently emitted to the front surface through the transparent front substrate 10 and the anode electrode 11. If neon, argon, or the like that emits visible light is added to the discharge gas, a mixed color with the emission color of the phosphor can be obtained.

Further, although not shown, if a color filter made of thin glass of the same color is arranged between the front substrate 10 and the anode electrode 11 corresponding to the emission color of each discharge cell 12, the fluorescent light can be obtained. By transmitting the light emitted from the body through the color filter, it is possible to obtain a single color that is not mixed.

Further, as shown in FIG. 3, the columnar electrode 4 comprises a cathode electrode 3 formed on the back substrate 2 and a barrier 6.
A mask 13 in which holes having a diameter of about 0.2 mm are formed vertically and horizontally by printing or the like on the surface of
It is obtained by applying a mixture of LaB ₆ and BaAl ₂ O ₄ from above the mask 13 by plasma spraying and then removing the mask 13 from above .

In this embodiment, the spacers 7 are
Although a layered structure is used, the shape of the hole 7a is not limited to this as long as the shape can approximate a mortar shape.
It may be any two or more layers including an insulating layer in which the light reflection layer 8 is not provided.

[0017]

As described above in detail, according to the present invention, the cathode electrode to be used for discharge is formed as a tip portion of a columnar discharge electrode erected on the surface of the cathode electrode, and other portions except for this tip portion are used.
By the partial insulated cover, discharge columnar discharge electrode
Between the tip of the discharge electrode and the anode electrode, and ultraviolet rays are radiated in all directions of the discharge cell from the vicinity of the tip of the columnar discharge electrode, and the ultraviolet rays pass through the phosphor layer on the inner wall of the spacer hole. Exciting evenly, the emission of extremely high brightness with a desired emission color according to the type of the phosphor layer occurs, and the light leaking to the back surface of the phosphor layer is located inside the phosphor layer. Since the light is efficiently reflected toward the front surface without being reflected by the light reflection layer formed and leaking toward the rear substrate, an extremely high-quality display can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a gas discharge display panel of the present invention.

FIG. 2 is a schematic sectional view of a main part of the gas discharge display panel of the present invention.

FIG. 3 is a cross-sectional view illustrating a method of manufacturing a columnar discharge electrode in the gas discharge display panel of the present invention.

FIG. 4 is an exploded perspective view of a conventional gas discharge display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas discharge display panel 2 Back substrate 3 Cathode electrode 4 Columnar discharge electrode 4a Tip part 5 Insulation coating 7 Spacer 7a Hole 8 Light reflection layer 9 Phosphor layer 10 Front substrate 11 Anode electrode 12 Discharge cell

Claims (1)

(57) [Claims] A plurality of columnar discharge electrodes, each of which has a plurality of columnar discharge electrodes erected at an interval, are formed by insulatingly covering other portions except for a tip end portion and having a tip end portion subjected to discharge. A light-reflecting layer and a phosphor layer covering the light-reflecting layer are formed on the inner wall of the rear substrate, and the hole diameter is increased upward. A spacer having an enlarged hole portion is provided, and a plurality of rows of anode electrodes are formed above the spacer so as to form a discharge cell by separating the columnar electrode from the discharge gap and intersecting the cathode electrode. The formed front substrate is arranged, and the peripheral portions of the front substrate and the rear substrate are hermetically sealed to form an airtight container, and a discharge gas mainly composed of ultraviolet radiation gas is sealed in the airtight container. Gas discharge display panel.