JP2981444B2 - 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 configured to obtain display light by exciting a phosphor with ultraviolet rays generated by generation of discharge in a discharge cell.
The present invention relates to a gas discharge display panel in which a discharge gas is enclosed in an envelope together with an ultraviolet radiation gas.

[0002]

2. Description of the Related Art As shown in FIGS. 3 and 4, a conventional gas discharge display panel 50 has a rear substrate 54 made of an insulating material having a plurality of strip-shaped cathodes 52 arranged on one side and a strip-shaped cathode 52 formed on one side. A front substrate 58 made of a transparent insulating material in which a plurality of transparent anodes 56 are juxtaposed.
Are disposed so that the cathode 52 and the discharge portion 56a of the transparent anode 56 are substantially orthogonal to each other with a predetermined discharge gap X (FIG. 3) therebetween.
The peripheral edges of both substrates are hermetically sealed with a sealing material (not shown) to form an envelope 60, and the inner space of the envelope 60 is filled with an ultraviolet radiation gas such as Xe. The cathode 52 is formed by laminating a strip-shaped cathode base 52a made of silver / palladium (Ag · Pd) and an emitter material made of a mixture of GdB ₆ and BaAl ₂ O _{4 on} the surface of the cathode base 52a. Layer 52
b, and the transparent anode 56 is NESA
Film (SnO ₂ ) or ITO film (In ₂ O ₃ .SnO ₂ )
And the like.

[0003] On the opposite surface 54a of the back substrate 54, each cathode
A substantially lattice-shaped rear barrier rib 62 having a first partition 62a for partitioning between the cathodes 52 and a second partition 62b for partitioning each cathode 52 by a predetermined length is formed. Also, the front substrate
A substantially lattice-shaped front barrier rib having a first partition 64a for partitioning between the transparent anodes 56 and a second partition 64b for partitioning the transparent anodes 56 by a predetermined length also on the opposing surface 58a of 58. 64 are formed. As a result, in the envelope 60, a large number of discharge cells 66 surrounded by the barrier ribs 62 and 64 of both substrates are formed in a dot matrix at each intersection of the transparent anode 56 and the cathode 52. It will be.

The facing surface 58a of the front substrate and the transparent anode 56
A phosphor 68 is applied on the surface of the substrate. However, the transparent anode 56 is not coated with the phosphor 68 over the entire surface, and a part of the transparent anode 56 is designed to be exposed in the discharge cell 66 as a discharge portion 56a. The phosphor 68
Is also applied to the inner wall surfaces of the front side barrier rib 64 and the rear side barrier rib 62.

A spacer 70 is formed at an end surface of the front side barrier rib 64 at a predetermined interval, and a spacer 70 is provided between the rear side barrier rib 62 and the front side barrier rib 64.
A gap 72 corresponding to the height of 70 is formed. The respective discharge cells 66 communicate with each other via the gap 72.

When a DC voltage is applied between the transparent anode 56 and the cathode 52, a discharge is generated between the discharge portion 56a of the transparent anode 56 and the cathode 52 in a desired discharge cell 66, and an ultraviolet ray is generated. Occurs. And this ultraviolet light is phosphor
By exciting the 68, display light having an emission color corresponding to the type of the phosphor 68 is transmitted to the outside through the transparent anode 56 and the front substrate 58. By selectively executing the above voltage application via a control / drive circuit (not shown), it is possible to display arbitrary characters and figures on the display surface 58b of the front substrate 58.

[0007]

By the way, the above envelope
If only ultraviolet radiation gas such as Xe is sealed in 60, the discharge starting voltage becomes high, and only a part of the electrodes is discharged at the time of discharge, so that the brightness of the gas discharge display panel becomes low. Problems arise. Therefore, in order to lower the discharge starting voltage and to enlarge the discharge area in the electrode, N.
A discharge gas such as e, He, Ar, or Kr is also sealed. However, in the conventional gas discharge display panel 50, a part of the transparent anode 56 is formed as a discharge part 56a, and accordingly, the discharge part 56a is formed.
Since a is transparent, a negative glow emission color (for example, orange in the case of Ne) of the discharge gas is emitted to the outside through the transparent discharge portion 56a and the front substrate 58 during discharge. As a result, there is a disadvantage that the chromaticity of the gas discharge display panel 50 is deteriorated.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a chromaticity capable of preventing a negative glow emission color of a discharge gas from being radiated to the outside. Another object of the present invention is to realize a gas discharge display panel having excellent performance.

[0011]

In order to achieve the above object, a gas discharge display panel according to the present invention comprises: a rear substrate made of an insulating material having a plurality of strip-shaped electrodes arranged on one surface;
A front substrate made of a transparent insulating material having a plurality of strip-shaped transparent electrodes arranged in parallel on one surface is disposed so as to face each other such that the electrodes of each substrate intersect with a predetermined gap therebetween, and discharge occurs at each intersection of the electrodes. forming a cell, the envelope and without the peripheral edge of the substrates hermetically sealed, a gas discharge display panel ing by sealing ultraviolet radiation gas and discharge gas into the outer envelope, the discharge cells Inside
On the surface of the transparent electrode, the electrode of the back substrate
Forming a discharge portion that generates a discharge between
The formation of the facing surface of the front substrate and the discharge part in the cell
Place the phosphor above the transparent electrode surface
In, characterized in that the formation of the discharge portion in opaque conductive material. As the opaque conductive material, for example, chromium,
Nickel, chromium oxide and nickel oxide are applicable. still,
The shape of the surface facing the front substrate and the discharge part in the discharge cell
And made not even transparent electrode surface, to place a color filter between the phosphor is desirable.

[0012] Thus , the back electrode is formed on the surface of the transparent electrode.
Since the discharge portion that generates a discharge between the electrodes of the plate is formed of an opaque conductive material, even if a negative glow luminescent color of the discharge gas is generated, the negative glow luminescent color is maintained. , And is prevented from being radiated to the outside.

[0013] Incidentally, a front substrate facing surface and formation of the discharge portion that is not transparent electrode surface within the discharge cell, be disposed a color filter between the <br/> phosphor, a gas discharge display panel The contrast ratio is improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas discharge display panel according to the present invention will be described below with reference to FIGS. FIG.
Is a schematic sectional view showing the gas discharge display panel 10, and FIG.
FIG. 2 is a schematic plan view showing a facing surface of a front substrate 14 according to the gas discharge display panel 10. This gas discharge display panel 10 has 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, which are opposed to each other with a predetermined discharge gap therebetween. The basic configuration is such that the peripheral edge is hermetically sealed via a sealing material (not shown) such as low-melting glass to form an envelope 16, and an internal space of the envelope 16 is filled with an ultraviolet radiation gas such as Xe. And

The envelope 16 also contains a discharge gas such as Ne, He, Ar, or Kr in addition to the ultraviolet radiation gas. This is because, when only the ultraviolet radiation gas such as Xe is sealed in the envelope 16, the discharge starting voltage becomes high, and only a part of the electrodes is discharged at the time of discharge. Since the luminance is reduced, a discharge gas is also sealed to lower the discharge starting voltage and increase the discharge area of the electrode.

A strip-shaped cathode is provided on the opposite surface 12a of the back substrate 12.
18 are formed. The cathode 18 includes a cathode base 18a made of silver, palladium (Ag, Pd) or the like, and a cathode base 18a.
An emitter layer 18b is formed by laminating an emitter material such as a mixture of GdB ₆ and BaAl ₂ O _{4 on} the surface of 18a. Although not shown in FIG. 1, a plurality of cathodes 18 are actually provided on the rear substrate at predetermined intervals.
They are arranged side by side on 12 opposing surfaces 12a. Also, the back substrate 12
A rear side barrier rib 20 is formed on the opposite surface 12a. This rear side barrier rib 20 is printed with low melting point glass.
It has a substantially lattice shape having a plurality of first partition walls 20a formed by baking or the like and partitioning between the cathodes 18, and a plurality of second partition walls 20b separating the cathodes 18 by a predetermined length. . Further, a phosphor 22 is applied to the inner surfaces of the first partition wall 20a and the second partition wall 20b of the rear barrier rib 20.

A band-shaped transparent anode 24 made of a transparent conductive film such as a NESA film (SnO ₂ ) or an ITO film (In ₂ O ₃ .SnO ₂ ) is formed on the facing surface 14a of the front substrate 14 at a predetermined interval. In this case, a plurality of coatings are formed. In addition, each transparent anode 24
A plurality of discharge portions 24a protrude from the surface of the device.
The discharge portion 24a is made of chromium (Cr), nickel (Ni)
Is formed by thick film printing or the like of a paste containing a black metal such as chromium oxide, or a conductive opaque metal oxide such as chromium oxide (Cr ₂ O ₃ ) or nickel oxide (NiO). is there. The discharge section 24a is connected to the transparent anode 24.
If it is arranged above the surface and is formed so as to have a height protruding from the surface of the phosphor 22 applied to the surface of the mask 36 described later, the discharge portion 24a is always exposed from the surface of the phosphor 22, and therefore, It is possible to prevent the discharge part 24a from being buried in the phosphor 22 and hindering the generation of discharge, and to prevent the area of the discharge part 24a from varying for each discharge cell 30. Further, the discharge portion 24a
Is formed so as to have a minimum discharge area required for discharge generation, the phosphor on the facing surface 14a side of the front substrate 14 is formed.
22 application areas can be secured to the maximum.

Further, as shown in FIG. 2, a front side barrier rib 26 is arranged on the facing surface 14a of the front substrate 14. The front-side barrier rib 26 is the same as the rear-side barrier rib 26.
Similarly to 20, a plurality of first partition walls 26a formed by printing and baking low-melting glass and partitioning between the transparent anodes 24,
Plural second partition walls that divide each transparent anode 24 into predetermined lengths
26b. The phosphor 22 is also applied to the inner surfaces of the first partition 26a and the second partition 26b of the front barrier rib 26, similarly to the rear barrier rib 20 described above. Also, the first partition 26a of the front side barrier rib 26
A spacer 28 made of an insulating material such as glass is protruded from an end surface at an intersection of the second partition wall 26b and the second partition wall 26b.

The rear substrate 12 and the front substrate 14 are disposed so that the discharge portions 24a and the cathodes 18 of the transparent anodes 24 of the respective substrates are opposed to each other so as to be substantially orthogonal to each other with a predetermined discharge gap therebetween. Each time, a large number of discharge cells 30 surrounded by the rear barrier ribs 20 and the front barrier ribs 26 are formed in a dot matrix. Since the end face of the spacer 28 is in contact with the end face of the rear barrier rib 20, a gap corresponding to the height of the spacer 28 is provided between the barrier ribs 20 and 26.
The discharge cells 30 are communicated with each other through the gaps 32.

As shown in FIG. 1, a color filter 34 is applied to the opposing surface 14a of the front substrate 14 in the discharge cell 30 and the entire surface of the transparent anode 24 where the discharge portion 24a is not formed. ing. Also, this color filter
On the surface of 34, a mask 36 made of transparent glass is applied. Further, the phosphor 22 is applied to the surface of the mask 36. The color filters 34 are arranged to improve the contrast ratio of the gas discharge display panel 10. That is, the external light that has entered the discharge cells 30 from the display surface 14b of the front substrate 14 is reflected on the phosphor 22 and appears whitish, so that the discharge cells 30 that are turned on and the discharge cells 30 that are turned off are distinguished. In order to prevent the image from becoming unclear, a color filter 34 is interposed on the side of the facing surface 14a of the front substrate 14 to suppress the entrance of external light. The mask 36 is provided to prevent the color filter 34 from being damaged by a sputtered substance generated from the cathode 18 during discharge.

The color filter 34, mask 36, phosphor
22 is formed by the following method. First, the front substrate 14
The entire surface of the transparent anode 24 where the opposite surface 14a and the discharge portion 24a are not formed is coated with a filter paste which is a base of the color filter 34 by thick-film printing and dried, and then a mask 36 is applied to the surface of the filter paste. A base glass paste is applied by thick film printing. After the drying of the glass paste is completed, the color filter 34 and the mask 36 are formed by baking the filter paste and the glass paste. Then, the phosphor 22 is applied to the surface of the mask 36 by thick film printing or the like.

As described above, if the discharge portion 24a on the surface of the transparent anode 24 is formed to have a height that protrudes from the surface of the phosphor 22 applied to the surface of the mask 36, the color filter 34 , The mask 36 and the phosphor 22 are applied, the discharge portion 24a is temporarily
Inside, even if it is buried in the phosphor 22, an extra color filter 34, mask 36,
By removing the phosphor 22, the discharge portion 24a can be easily exposed.

When a DC voltage equal to or higher than the discharge starting voltage is applied between the transparent anode 24 and the cathode 18 from a power source (not shown), a voltage is formed on the surface of the transparent anode 24 in the discharge cell 30.
A discharge is generated between the tip of the discharged discharge portion 24a and the cathode 18 to generate ultraviolet rays. Since the ultraviolet light excites the phosphor 22, light of a color corresponding to the type of the phosphor 22 is generated, and the colored light passes through the transparent anode 24 and the front substrate 14 and is emitted to the outside. By selectively executing this voltage application via a control / drive circuit (not shown), a desired discharge cell is obtained.
At 30, discharge light emission is generated, and the display surface 14 of the front substrate 14 is formed.
Arbitrary characters and figures can be displayed on b. In addition,
During discharge, the flow of ions between the discharge cells 30 is ensured through the gap 32.

In the gas discharge display panel 10 according to the present invention, the discharge portion 24a formed on the surface of the transparent anode 24 is formed of an opaque conductive material. Is generated, the negative glow emission color is
24a can be prevented from being transmitted to the outside.

Further, it is necessary to provide a predetermined discharge gap between the discharge portion 24a and the cathode 18, but in the present invention, since the discharge portion 24a is formed so as to protrude, the protruding discharge portion is formed. When the cathode 24a and the cathode 18 are arranged at a predetermined discharge gap X (FIG. 1), the front side of the gas discharge display panel 50 shown in FIG. The height of the barrier rib 26 and the rear-side barrier rib 20 can be increased. As a result, the front side barrier rib
The coating area of the phosphor 22 on the inner surface 26 and the rear side barrier rib 20 can be increased, and the luminance can be improved.

Further, since the discharge portion 24a protrudes from the surface of the phosphor 22 applied to the surface of the mask 36, a considerable portion of the sputtered substance generated from the cathode 18 at the time of discharge is discharged.
Accordingly, the amount of the sputtered substance adhering to the phosphor 22 on the front substrate facing surface 14a side is reduced by that amount, and the deterioration of the luminance can be prevented.

[0027]

In the gas discharge display panel according to the present invention, the gas discharge display panel is formed on the surface of the transparent electrode and is disposed between the transparent electrode and the electrode on the rear substrate.
Since the discharge portion that generates the discharge in the non-translucent conductive material is formed, even if a negative glow emission color of the discharge gas is generated, the negative glow emission color does not pass through the discharge portion. Is prevented from being radiated to the outside. Therefore, a gas discharge display panel having excellent chromaticity can be realized.

[Brief description of the drawings]

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

FIG. 2 is a schematic plan view showing a facing surface of a front substrate according to the gas discharge display panel.

FIG. 3 is a schematic sectional view showing a conventional gas discharge display panel.

FIG. 4 is a schematic plan view showing a facing surface of a front substrate according to the gas discharge display panel.

[Explanation of symbols]

 10 Gas discharge display panel 12 Rear substrate 12a Opposite surface of rear substrate 14 Front substrate 14a Opposite surface of front substrate 16 Enclosure 18 Cathode 20 Rear barrier rib 22 Phosphor 24 Transparent anode 24a Discharge part of transparent anode 26 Front barrier rib 28 Spacer 30 Discharge cell 32 Gap 34 Color filter 36 Mask

Claims (3)

(57) [Claims] 1. A back substrate made of an insulating material having a plurality of strip-shaped electrodes arranged on one surface thereof and a front substrate formed of a transparent insulating material having a plurality of strip-shaped transparent electrodes arranged on one surface thereof. Are arranged facing each other so as to intersect with a predetermined gap,
The discharge cells formed at a cross portion of each electrode, the envelope and without the peripheral edge of the substrates hermetically sealed, gas discharge display ing by sealing ultraviolet radiation gas and discharge gas into the outer envelope On the panel
And the surface of the transparent electrode in the discharge cell
A discharge section for generating a discharge between the electrodes on the back substrate.
And facing the front substrate in the discharge cell.
Surface and the surface of the transparent electrode where the discharge part is not formed
A gas discharge display panel, wherein a phosphor is disposed on the other side, and the discharge portion is formed of an opaque conductive material. 2. The gas discharge display panel according to claim 1, wherein the opaque conductive material is one of chromium, nickel, chromium oxide, and nickel oxide. A front substrate facing surface and a discharge portion is not formed transparent electrode surface of the 3. A discharge cell, according to claim 1 or 2, characterized in that a color filter between the phosphor Gas discharge display panel.