JPH06176697A - Gas electric discharge light emission element - Google Patents

Abstract

PURPOSE:To form a gas electric discharge light emission element of high brightness and high efficiency by forming the component of a discharge cell where no phosphor is provided from a material that reflects ultraviolet radiation, thereby using a cell barrier as an emission exciting source. CONSTITUTION:A cathode 15 is formed with e.g. a film thickness of 20mum, a width of 200mum and a pitch of 300mum on a back panel 12 made from glass. A 300mumX300mum lattice cell barrier 13 is formed with e.g. a width of 120mum and a height of 200mum in such a way that the cathode 15 forms one display cell. The barrier 13 is formed by using screen printing method to perform multilayer printing using a paste composed mainly of a material that reflects ultraviolet radiation. Thereafter, baking is carried out at e.g. around 600 deg.C for thirty minutes to stick the cathode 15 and the cell barrier 13 onto the back panel 12. An anode 14 and a phosphor 16 are formed on a front panel 11 and are sealed after the front panel 11 and the back panel 12 are sealed to each other, so as to obtain a DC plasma display panel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas discharge light emitting device in which ultraviolet rays generated by gas discharge are used to excite a phosphor and the light emitted from the phosphor is visually recognized.

[0002]

2. Description of the Related Art Conventionally, as a typical example of this type of gas discharge light emitting device, a plasma display panel (hereinafter, referred to as
(Referred to as PDP) is known.

FIG. 3 shows one configuration example of a conventional DC type PDP. As shown in the figure, this DC type P
In the DP, a flat plate-shaped front plate 11 and a rear plate 12 made of glass are arranged in parallel and opposite to each other, and both are held at a constant interval by a cell barrier 13 provided therebetween. ing. Further, an anode 14 is formed on the back side of the front plate 11 and the back plate 12
A cathode 15 is formed on the front surface side of the anode orthogonally to the anode 14, and a phosphor surface of a phosphor 16 is formed adjacent to both sides of the anode 14.

In the above conventional DC type PDP, a front plate 11 and a back plate 12 are formed by applying a predetermined voltage from a DC power source between the anode 14 and the cathode 15 to form an electric field.
Gas discharge is performed inside each cell 17 as a display element configured by the cell barrier 13 and the cell barrier 13. Then, by the ultraviolet rays generated by this gas discharge, the phosphor 1 on the back side of the front plate 11 is
The visible light 6 emitted from the front plate 11 is visually recognized by an observer.

FIG. 4 shows an example of the structure of a conventional AC type PDP. As shown in FIG.
In the C-type PDP as well, as in the case of the DC-type PDP, a flat plate-shaped front plate 21 and a rear plate 22 made of glass are arranged in parallel and opposite to each other, and both are provided between them. The cell barriers 23 are held at regular intervals. Further, in this AC type PDP, two electrodes 2 which are orthogonal to each other are provided on the front surface side of the back plate 22.
4, 25 are formed via the dielectric layer 26, the dielectric layer 27 and the protective layer 28 are further formed on the front surface side thereof, and the phosphor surface by the phosphor 29 is formed on the back surface side of the front plate 21. It has a structured structure.

In the conventional AC PDP, a front plate 21 and a rear plate 22 are formed by applying a predetermined voltage from an AC power source between the two electrodes 24 and 25 to form an electric field.
Gas discharge is performed inside each cell 30 as a display element including the cell barrier 23 and the cell barrier 23. Then, due to the ultraviolet rays generated by this gas discharge, the phosphor 2 on the back side of the front plate 21 is
The visible light 9 emitted from the front plate 21 is visually recognized by the observer.

By the way, in the above PDP,
The light emitted from the phosphor is transmitted through the phosphor itself and is visually recognized by an observer, so that the amount of light is reduced when the phosphor is transmitted. Therefore, for the purpose of increasing the brightness, a structure in which the reflected light from the fluorescent surface is visually recognized, or a PDP in which the fluorescent surface is formed on the wall surface of the cell barrier and the reflected light of the light emitted from the wall surface is directly viewed is also used. Proposed.

[0008]

However, in any of the above PDPs, not all ultraviolet rays generated by gas discharge hit the phosphors that emit visible light, and a considerable amount of ultraviolet rays constitutes discharge cells. It is not used for the excitation of a phosphor that contributes to the emission of visible light by being hindered by a structure such as a cell barrier. Therefore, there is a problem that sufficient brightness and luminous efficiency are not obtained.

The present invention has been made in view of the above problems, and an object thereof is to provide a gas discharge light emitting device having high brightness and high efficiency without largely changing the conventional structure. To provide.

[0010]

In order to achieve the above object, the present invention provides a gas in which the phosphor is excited by utilizing the ultraviolet rays generated by the gas discharge in the discharge cell and the light emission thereof is visually recognized. In the discharge light-emitting element, a part or the whole of the structure that does not have the fluorescent substance among the structures that form the discharge cell is formed of a substance that reflects ultraviolet rays, or among the structures that form the discharge cell. It is characterized in that a substance that reflects ultraviolet rays is arranged on a part or the whole of the surface of the structure in which the phosphor is not provided.

[0011]

In the gas discharge light emitting device having the above-mentioned structure, the substance that reflects ultraviolet rays serves to increase the amount of ultraviolet rays that contribute to the excitation of the phosphor.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a DC type PDP as a gas discharge light emitting device according to the present invention. As shown in FIG. 1, a front plate 11 and a rear plate 12 are spaced by a cell barrier 13 at regular intervals. The anode 14 is held on the back side of the front plate 11 and the cathode 15 on the front side of the back plate 12.
4 is provided orthogonally to each other, and on both sides of the anode 14, a phosphor screen made of a phosphor 16 that emits visible light is adjacently formed. Then, in this embodiment, the cell barrier 13 is formed of a substance that reflects ultraviolet rays.

The procedure for producing the DC type PDP is the same as the conventional one, and is specifically as follows.

First, a cathode 1 having a film thickness of 20 μm, a width of 200 μm and a pitch of 300 μm is formed on a back plate 12 made of glass.
5 is formed. Such a shape can be easily formed by, for example, a screen printing method. In addition, the electrode material should be N-type in consideration of sputtering resistance and secondary electron emission coefficient.
It is preferable to use an i alloy.

Next, one cathode 15 has a width of 120 μm and a height of 200 μm so that one cathode 15 constitutes one display cell.
A 300 μm × 300 μm lattice-shaped cell barrier 13 is formed. The cell barrier 13 can be formed by performing a multi-layer printing of, for example, 8 to 10 layers by a screen printing method using a paste containing a substance that reflects ultraviolet rays as a main component. Here, as the material that reflects ultraviolet rays, CaF ₂ , MgF
₂ , powders of Al ₂ O _{3 and the} like can be used. Then 600
The cathode 15 and the cell barrier 13 are fixed on the back plate 12 by baking at about C for 30 minutes.

Then, the anode 14 and the phosphor 1 are provided on the front plate 11.
6 is formed, and the front plate 11 and the back plate 12 are sealed and filled with gas to form the DC PDP shown in FIG.

In the DC type PDP of the embodiment shown in FIG. 2, a reflection layer 18 is formed by arranging a substance that reflects ultraviolet rays on the entire wall surface of a conventional cell barrier 13. Such a reflective layer 18 can be formed by a sandblast method or a slurry sedimentation method.

In the sandblasting method, after the cathode 15 and the cell barrier 13 are formed on the back plate 12, a paste containing a substance that reflects ultraviolet rays is filled in the cell barrier 13 to form a pattern of eyes smaller than the size of the cell 17. The unnecessary portion of the paste is removed by sandblasting through the mask provided with, and then the reflective layer 18 is formed on the wall surface of the cell barrier 13 through a firing process.

In the slurry sedimentation method, the cell barrier 13 is filled with a slurry liquid containing a substance that reflects ultraviolet rays, and immediately after that, the back plate 12 is tilted substantially vertically or more to be contained in the slurry liquid. The reflective material is the cell barrier 1
It is allowed to stand until it is sufficiently settled on the wall surface of No. 3 and then dried, and the reflecting layer 18 is formed on the wall surface of the cell barrier 13 through a firing process.

PDPs produced based on the above-mentioned embodiments
Regarding the above, when the luminance and the luminous efficiency were measured, a significant improvement in characteristics was obtained.

In the embodiment shown in FIGS. 1 and 2, DC is used.
The type PDP has been described, but the present invention is not limited to the AC shown in FIG.
The same applies to the type PDP.

[0023]

As described above, the present invention provides a gas discharge light emitting element in which the phosphor is excited by utilizing the ultraviolet rays generated by the gas discharge in the discharge cell and the light emission thereof is visually recognized. Part of the structure that does not have a phosphor is formed of a substance that reflects ultraviolet rays, or the structure that forms a discharge cell is not provided with a phosphor Since a substance that reflects ultraviolet rays is arranged on part or all of the structure,
Since a part that has not conventionally contributed to light emission, such as a cell barrier, can be used as a luminescence excitation source, it is possible to form a high-luminance, high-efficiency gas discharge light-emitting device without significantly changing the conventional conditions such as the structure. it can.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an example of a DC type plasma display panel as a gas discharge light emitting device according to the present invention.

FIG. 2 is a partial cross-sectional view showing another example of a DC type plasma display panel as a gas discharge light emitting device according to the present invention.

FIG. 3 is a partial cross-sectional view showing a conventional DC type plasma display panel.

FIG. 4 is a partial cross-sectional view showing a conventional AC type plasma display panel.

[Explanation of symbols]

 11 Front Plate 12 Back Plate 13 Cell Barrier 14 Anode 15 Cathode 16 Fluorescent Surface 17 Cell 18 Reflective Layer 21 Front Plate 22 Back Plate 23 Cell Barrier 24, 25 Electrode 26, 27 Dielectric Layer 28 Protective Layer 29 Fluorescent Surface 30 Cell

Claims (2)

[Claims] 1. A gas discharge light-emitting device in which ultraviolet rays generated by gas discharge in a discharge cell are used to excite the fluorescent material so that the emitted light is visually recognized. A gas discharge light emitting device, characterized in that a part or the whole of the structure not provided is formed of a substance that reflects ultraviolet rays. 2. A gas discharge light-emitting device in which ultraviolet rays generated by gas discharge in a discharge cell are used to excite the phosphor and the light emission thereof is visually recognized. Among the structures constituting the discharge cell, the phosphor is A gas discharge light emitting device, characterized in that a part of or the entire surface of a structure not provided is provided with a substance that reflects ultraviolet rays.