JPH0713892B2 - 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 brightness display with a desired luminescent 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
Formed a plurality of rows of strip-shaped cathode electrodes 23 made of nickel (Ni) paste or the like on a back substrate 22 made of an insulating material such as flat glass, and bored holes 24a vertically and horizontally on the cathode electrodes 23. A white barrier 24 made of an insulating material such as glass is provided. Further, on the upper surface of the barrier 24, there is a hole 25a corresponding to the hole 24a,
An anode plate 25 made of an insulating material such as glass, which is formed by nickel plating or the like, is formed on the back surface of the anode electrode 26 which communicates with the row of holes 25a on the back surface, and the cathode plate 23 and the anode electrode 26 are arranged so as to cross each other. There is. Then, above the anode plate 25, a front substrate 28 having a fluorescent substance layer 27 formed of a fluorescent substance deposited on the portions corresponding to the holes 24a, 25a is arranged. Further, the peripheral portions of the back substrate 22 and the front substrate 28 are hermetically sealed to form an airtight container, and the ultraviolet radiation gas is sealed in the airtight container.

This conventional gas discharge display panel 21 discharges into a discharge cell surrounded by a barrier 24 when a predetermined DC voltage is applied between a cathode electrode 23 and an anode electrode 26 which are vertically opposed to each other. Occurs and emits ultraviolet rays. Then, this ultraviolet ray excites the fluorescent substance of the fluorescent layer 27 formed on the front substrate 28 to generate colored light emission according to the type of the fluorescent substance, and this colored light emission causes the fluorescent layer 27 and the front surface to emit light. The light is transmitted through the substrate 28 and emitted to the front surface.

[0004]

However, in the above-mentioned conventional gas discharge display panel, the colored light emission generated by the discharge is transmitted to the front surface through the semitransparent phosphor layer. However, there has been a problem that, for example, a desired bright luminescent color changes to a dull color and a desired suitable luminescent color cannot be obtained.

Therefore, in the present invention, the problems in the conventional gas discharge display panel described above are solved, a desired emission color according to the type of the fluorescent substance is obtained, and an extremely high brightness display is obtained. 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 first discharge electrode on the upper surface of a rear substrate on which a plurality of rows of first discharge electrodes are formed. A spacer having a hole formed by correspondingly forming a light reflecting layer and a fluorescent material layer covering the light reflecting layer on the inner wall and expanding the hole diameter upward is provided. At the same time, a plurality of strip-shaped insulating substrates each having a second discharge electrode formed on both surfaces intersect each other with a discharge gap between the first discharge electrode and the second discharge electrode to form a discharge cell. As described above, a standing wall is provided as a partition wall on one side of the hole, a front substrate is further arranged above them, and the peripheral portions of the front substrate and the rear substrate are hermetically sealed to form an airtight container. Discharge gas consisting mainly of ultraviolet radiation gas is enclosed in this airtight container. It is intended to.

[0007]

In the upper surface of the rear substrate on which a plurality of rows of first discharge electrodes are formed, holes are formed correspondingly to the first discharge electrodes, and the inner wall covers the light reflecting layer and the light reflecting layer. A plurality of strip-shaped insulating substrates formed by depositing a fluorescent material layer and arranging a spacer having a hole portion formed by expanding the hole diameter upward and forming second discharge electrodes on both surfaces. Is erected as a partition wall on one side of the hole so that the first discharge electrode and the second discharge electrode intersect each other across a discharge gap to form a discharge cell, and further above them. By arranging the front substrate, and sealing the peripheral portions of the front substrate and the rear substrate in an airtight manner to form an airtight container, and enclosing a discharge gas mainly containing ultraviolet radiation gas in the airtight container, A discharge cell when a predetermined voltage is applied between the first discharge electrode and the second discharge electrode. Discharge occurs and emits ultraviolet rays, the ultraviolet rays excite the fluorescent substance to emit light, and the light generated from the fluorescent layer is directly emitted from the front substrate without passing through the fluorescent layer, Of this light, the light that leaks to the back surface of the phosphor layer is reflected by the light-reflecting layer and is efficiently emitted to the front surface without leaking toward the back substrate, so that the desired light emission according to the type of the phosphor layer is achieved. An extremely high-intensity display by color can be obtained.

[0008]

1 is a schematic perspective view of a gas discharge display panel of the present invention, FIG. 2 is a schematic perspective view of a main part of the gas discharge display panel of the present invention, and FIG. 3 is an exploded view of the main part of the gas discharge display panel of the present invention. FIG. 4 is a perspective view, FIG. 4 is a cross-sectional view of a main part of the gas discharge display panel of the present invention, and FIG. 5 is a plan view showing a method for manufacturing a cathode plate in the gas discharge display panel of the present invention.

In the figure, 1 is a gas discharge display panel of the present invention, 2 is about 180 mm long, 280 mm wide, and several meters thick.
m is a back substrate made of an insulating material such as flat glass, and a transparent NESA made of tin oxide (SnO ₂ ) is provided on the upper surface of the back substrate.
Film and indium oxide (InO ₂ ) with tin oxide (SnO ₂ ) added
A transparent ITO film made of n ₂ O ₃ ) is applied in a plurality of rows of strips, and this is fired to form the anode electrode 3. Although not shown in the drawing, a light reflection layer is formed on the lower surface of the rear substrate 2 by vapor deposition of a metal such as aluminum or nickel, and the light transmitted from the upper surface of the rear substrate 2 is reflected.

[0010] One end edge of the rear substrate 2 top surface, the intermediate layer 4 ₁ of a non-crystallized glass obtained by mixing crystallized glass or inorganic powder containing glass crystal is formed in a strip shape, the intermediate layer 4 ₁ An external terminal connection portion 3a formed at one end of the anode electrode 3 for connecting an external terminal is adhered to the upper surface of the. The intermediate layer 4 _1, thermal such as soldering to conductive layer, such as an external terminal lead portion, if the applied mechanical stress, even cracks from the surface immediately in contact with the intermediate layer beneath the conductive layer This prevents a situation in which the conductor layer is separated from the insulating substrate due to the progress of cracks being stopped by the crystallized glass or the inorganic powder inside the intermediate layer.

Reference numeral 5 denotes an insulating material such as thin glass having a thickness of about 0.2 mm on the upper surfaces of the rear substrate 2 and the anode electrode 5.
It is a spacer formed by stacking one sheet. Then, ₁ 5 from the back side of the substrate 2, 5 _2, 5 _3, 5 _4, 5 ₅ each spacer disposed in this order, vertically and horizontally corresponding to the arrangement intervals of the anode electrode 3, respectively substantially square hole Parts 5 ₁ a, 5 ₂ a, 5
The ₃ a, 5 ₄ a, 5 ₅ be bored by gradually expanding the pore size of a, formed to communicate the hole portion _{5 1 a, 5 2 a,} 5 3 a, 5 4 a, 5 5 a The hole portion 5a to be formed has a shape in which the hole diameter is enlarged stepwise upward.

Reference numeral 6 indicates a thickness of about 0.3 mm and a height of about 0.8 m.
m is a strip-shaped cathode plate made of an insulating material such as glass. One end face of the strip-shaped cathode plate is placed on the upper surface of the spacer 5 ₁ and is arranged as a partition wall on one side of each hole 5a of the spacer 5. ing. Then, transparent cathode electrodes 7 are formed in a strip shape on both surfaces of the cathode plate 6, and 0.2 × 0.4 is formed in a portion to be discharged.
The cathode electrode 7 is covered with a cathode mask 8 made of a transparent dielectric material such as glass having a window portion 8a of about mm.

The cathode electrode 7 is a NESA film (Sn
O ₂ ), an ITO film (In ₂ O ₃ · SnO ₂ ), or the like, and a cathode base made of a transparent conductive film, and NiO, Cu ₂ O, MoO ₂ , W ₂ O ₃ or the like deposited on the surface of the cathode base. 3 with the more becomes amorphous transparent semiconductor layer, said deposited on the surface of the semiconductor layer has been _{BaO · La 2 O 3, NiO} · BaO, and amorphous transparent emitter layer made of MgO or the like
It has a layered structure.

To make the cathode plate 6, as shown in FIG. 5, first, NESA made of tin oxide (SnO ₂ ) is formed on both sides of a glass sheet having a thickness of 0.3 mm.
Film and indium oxide (InO ₂ ) with tin oxide (SnO ₂ ) added
A transparent conductive film such as an ITO film made of n ₂ O ₃ ) is deposited to form a cathode substrate, and the cathode substrate is etched to form a predetermined pattern. Next, by glass etching, a plurality of plates having the outer shape of the cathode plate (including the concave portion 6a) are formed in parallel in the frame, and on both ends of the cathode substrate on the surface of these plates, as shown in FIG. the intermediate layer 4 ₂ of a non-crystallized glass obtained by mixing crystallized glass or inorganic powder containing glass crystal with deposited form, and a compensation conductor 9 made of a good conductor in parallel with the cathode substrate is deposited and formed , Bake this. Further, silver toward the cathode substrate and the intermediate layer 4 ₂ Doo as the terminal portion of the cathode plate - the cathode terminal 10 made of palladium alloy (Ag-Pd) was deposited and formed, also on the surface of the cathode base metal organic decomposition method By depositing an amorphous transparent semiconductor layer made of NiO, Cu ₂ O, MoO ₂ , W ₂ O _3, etc., and then BaO.La on the surface of this semiconductor layer by an organic decomposition method.
_The cathode electrode 7 is formed by depositing an amorphous transparent emitter layer made of ₂ O ₃ , NiO.BaO, MgO or the like. Then, the cathode mask 8 is formed on the portion of the cathode electrode 7 other than the portion for discharging, and the cathode mask 8 is baked.
Finally by separating the plate from the frame,
It is possible to efficiently manufacture a plurality of cathode plates 6 at once.

The compensation conductor 9 is a good electrical conductor. N
The resistance value of the cathode electrode 7 having the cathode base made of the ESA film or the ITO film is higher than that of a good conductor, and therefore, in the cathode electrode portion far from the power supply, discharge emission may be dark due to the voltage drop due to this resistance. There is. In order to prevent such a voltage drop, the compensation conductor 9 is arranged on the cathode electrode 7 in order to make the potential difference between the anode electrodes 3 and the cathode electrode 7 substantially uniform, that is, to compensate for the high resistance value of the cathode electrode 7. It was set up.

The cathode terminal 10 is a silver-palladium alloy (Ag-) which is also formed on the edge of the upper surface of the rear substrate 2.
Although connected by the solder 12 on the external terminal lead portion 11 made of Pd), the external terminal lead portion 11 is also deposited and formed on the intermediate layer 4 ₃ formed in a strip shape to the edge of the rear substrate 2 top surface Has been done.

Reference numeral 13 denotes holes 5 ₁ a, 5 ₂ a, 5 a of the spacer 5.
5 ₃ a, 5 ₄ a, 5 ₅ a is a mirror-like light reflecting layer formed by vapor deposition of a metal such as aluminum or nickel on the inner wall, and the surface of this light reflecting layer 13 has a fluorescent substance. The phosphor layer 14 made of is formed. This fluorescent layer 14
By arranging three types of a fluorescent layer that emits red light, a fluorescent layer that emits blue color, and a fluorescent layer that emits green color by irradiating ultraviolet rays, and by arranging these in an appropriate pattern, the present invention It enables color display in the gas discharge display panel 1.

Then, a front substrate 15 made of transparent glass is disposed on the upper ends of the spacer 4 and the cathode plate 5 formed on the rear substrate 2, and the peripheral portions of the rear substrate 2 and the front substrate 15 are further made of low melting point glass. An airtight container 17 is formed by sealing with a sealing material 16 such as. A space surrounded by the hole 5a, the cathode plate 6, and the rear substrate 2 and intersecting the anode electrode 3 and the cathode electrode 7 with a discharge gap of about 90 degrees is a discharge cell 18. Helium in the airtight container 17 through the exhaust pipe 17a,
A gas discharge display panel 1 is completed by filling a discharge gas mainly composed of an ultraviolet radiation gas mainly composed of a single substance or a mixture of a rare gas such as xenon and then sealing off the exhaust pipe 17a.

Reference numeral 6a denotes a recess formed in the upper end surface of the cathode plate 6 in each discharge cell 18 by notching, and discharges charged particles (ions) of the ultraviolet radiation gas between the discharge cells 18 facing each other across the cathode plate 5. The distribution is intended to prevent flickering due to discharge delay. In the present embodiment, the recess 6a is formed by cutting out only the upper end of the cathode plate 6, but the cathode plate 6
Notches may be formed on both sides of the upper end and the lower end.

In the gas discharge display panel 1 having such a structure, when a predetermined voltage is applied between the anode electrode 3 and the cathode electrode 7, the cathode electrode 7 exposed through the window 8a of the cathode mask 8 is exposed. Part and anode electrode 3
Ultraviolet rays are radiated around by discharge in the discharge gap which is held by the thickness of spacer 5 ₁ occurs between the light emission occurs the ultraviolet rays excite the fluorescent material layer 14 in the discharge cells 18, The light including the light reflected by the light reflection layer 13 is emitted to the front surface through the front substrate 15. Since the cathode plate 6, the cathode electrode 7, and the cathode mask 8 are all transparent, the above-mentioned light emission is emitted not only to the cell in which the discharge has occurred but also to the adjacent discharge cell via the cathode plate 6. However, the light to the adjacent discharge cells is also radiated to the front surface without waste by the light reflecting layer 13. If neon or argon that emits visible light is added to the discharge gas, a mixed color with the emission color of the fluorescent substance can be obtained.

The above-mentioned anode electrode 3 and cathode electrode 7
Plasma spray of lanthanum hexaboride (LaB ₆ ) instead of a transparent material, nickel (Ni) paste or silver
It may be formed by thick film printing of palladium (Ag / Pd) paste or the like. In this case, light does not leak from the cell in which discharge occurs to the adjacent discharge cell, and light is emitted for each cell, and compensation is further performed. It is not necessary to arrange the conductor 9 in parallel with the cathode electrode 7.

Further, although not particularly shown In the FIG. 3, the light reflection layer 13 and the fluorescent material layer 14, the hole 5 ₁ a, 5 ₂
Reflection of discharge light emission is better when not only the inner wall of a, 5 ₃ a, 5 ₄ a, 5 ₅ a is deposited and formed, but also the deposition is performed on all exposed surfaces of the spacer 5 in each discharge cell 18. It is highly efficient.

[0023]

As described in detail above, according to the present invention, the gas discharge display panel of the present invention can have a thin structure, and a light reflection layer and this light reflection layer are provided on the inner wall of the hole forming the discharge cell. By forming a fluorescent material layer covering the reflective layer, a discharge is generated in the discharge cell when a predetermined voltage is applied between the first discharge electrode and the second discharge electrode, and ultraviolet rays are generated. The ultraviolet light excites the fluorescent substance to emit light, and the light generated from the phosphor layer is directly emitted from the front substrate without passing through the phosphor layer. Light that leaks to the back surface of the body layer is reflected by the light reflection layer and efficiently radiates to the front surface without leaking in the direction of the back substrate, so that it has an extremely high brightness with a desired emission color according to the type of the phosphor layer. The display is what you get.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a gas discharge display panel of the present invention.

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

FIG. 3 is an exploded perspective view of a main part of the gas discharge display panel of the present invention.

FIG. 4 is a cross-sectional view of a main part of the gas discharge display panel of the present invention.

FIG. 5 is a plan view showing a method of manufacturing a cathode plate in the gas discharge display panel of the present invention.

FIG. 6 is an exploded perspective view of a conventional gas discharge display panel.

[Explanation of symbols]

 1 Gas Discharge Display Panel 2 Rear Substrate 3 Anode Electrode 4 Intermediate Layer 5 Spacer 5a Hole 6 Cathode Plate 7 Cathode Electrode 13 Light Reflective Layer 14 Fluorescent Layer 15 Front Substrate 17 Airtight Container 18 Discharge Cell

Claims (1)

[Claims] 1. A light-reflecting layer and a light-reflecting layer are formed on an inner wall of a rear substrate having a plurality of rows of first discharge electrodes formed thereon, corresponding to the first discharge electrodes. A spacer having a hole portion formed by adhering a fluorescent material layer to be covered and expanding the hole diameter upward is provided,
A plurality of strip-shaped insulating substrates formed by the discharge electrodes of
The first discharge electrode and the second discharge electrode are erected as a partition wall on one side of the hole so as to intersect with each other with a discharge gap therebetween to form a discharge cell, and above the front substrate. And a peripheral portion of the front substrate and the rear substrate are hermetically sealed to form an airtight container, and a discharge gas mainly containing ultraviolet radiation gas is enclosed in the airtight container. Discharge display panel.