JPH06267434A - Plasma display panel - Google Patents

Abstract

PURPOSE:To provide a surface discharging type plasma display panel having stable operation. CONSTITUTION:A plasma display panel is consisting of a protective coat (14) formed on the surface of a dielectric layer (13) adhered to the surface of a substrate (11) on which a plurality of electrodes (12) are formed in parallel with each other and partitions (23) provided in parallel with a plurality of opposed electrodes (22) crossing at right angles to the electrodes (12) via a discharging space (S). The protective coat (14) is formed only in an area opposite to the opposed electrodes (22) provided on the surface of dielectric layer (13) and not in an area opposed to the partition (23) provided on the surface of the dielectric layer (13).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly to a stable surface discharge type plasma display panel.

[0002]

2. Description of the Related Art Next, a conventional surface discharge type plasma display panel (hereinafter simply referred to as a plasma display panel) will be described with reference to FIG.

FIG. 3 is an explanatory view of a conventional plasma display panel, FIG. 3 (a) is a schematic sectional view of the plasma display panel, and FIG. 3 (b) is a schematic plan view of a first substrate. Is.

In FIG. 3, 10 'is a first substrate and 11 is a first substrate.
The glass substrate 12, which is the main material of the substrate 10 ', is formed on the surface of the glass substrate 11 and includes a first electrode 12-1 and a second electrode 12-2 to which voltages of different polarities are alternately applied. A counter electrode,
Reference numeral 13 denotes a dielectric layer which is deposited on the surface of the glass substrate 11 and covers the counter electrode 12, 14 'denotes an MgO film formed by depositing an oxide-based material, for example, MgO, on the surface of the dielectric layer 13, and 20'. Is a second substrate, 21 is a glass substrate which is the main material of the second substrate 20, 22 is a counter electrode formed on the surface of the glass substrate 21, and 23 is a comb formed between the counter electrodes 22 on the surface of the glass substrate 21. The partition wall 24 has teeth, 24 is a sealing material made of low melting point glass which is circumferentially adhered to the surface of the glass substrate 21, and 25 is the first electrode 12-1 and the second electrode 12 of the counter electrode 12. When the discharge gas G in the discharge space S is caused to emit light by alternately applying voltages having different polarities to −2 and −2, it is a phosphor that absorbs ultraviolet rays contained in the light and generates fluorescence.

That is, in the conventional plasma display panel, as shown in FIG. 3 (a), the first substrate 10 'and the second substrate 20 whose surfaces are opposed to each other are sealed (sealed) by the sealing material 24. Then, the discharge space S partitioned by the surfaces of the first substrate 10 'and the second substrate 20 and the sealing material 24 is filled with a discharge gas G made of, for example, a mixed gas of neon gas and xenon gas. I am configuring.

By the way, in the conventional plasma display panel, the MgO film 14 'of the first substrate 10' is
As shown in FIGS. 3 (a) and 3 (b), MgO was deposited to a thickness of about 5000Å on almost the entire surface of the dielectric layer 13.

In the present specification, the same parts, the same materials and the like are designated by the same reference numerals throughout the drawings.

[0008]

The MgO film 14 'is
The dielectric layer 13 is protected from being damaged by the impact of the ions (Ne ⁺ and Xe ⁺ ) formed in the discharge space S when the plasma display panel is operated, and the secondary electrons when the ions collide It is well known that the emission ratio γ is large and has an action of lowering the discharge start voltage and the like of the plasma display panel.

By the way, in the conventional plasma display panel, since the MgO film 14 'is deposited on almost the entire surface of the dielectric layer 13 as described above, when the plasma display panel is operated, the tips of the partition walls 23 are formed. Secondary electrons are also actively emitted from the nearby MgO film 14 '.

Therefore, the surface of the MgO film 14 'and the partition wall 23
If there is a gap A in which electrons can relatively move with each other, the coupling between the discharge cells C adjacent to each other via the barrier ribs 23 is strengthened, and excess lighting occurs when the plasma display panel is operated. It may cause malfunctions such as.

The present invention has been made to solve such a problem, and an object thereof is to provide a surface discharge type plasma display panel which operates stably.

[0012]

As shown in FIG. 1, for the above-mentioned purpose, a protective film 14 formed on the surface of a dielectric layer 13 adhered to the surface of a substrate 11 on which a plurality of electrodes 12 are formed in parallel. When,
A plurality of counter electrodes 22 which are orthogonal to the electrode 12 with the discharge space S interposed therebetween.
In the plasma display panel including the barrier ribs 23 arranged alternately in parallel with each other, the protective film 14 is formed only in a region of the surface of the dielectric layer 13 facing the counter electrode 22, and the surface of the dielectric layer 13 is formed. The plasma display panel is characterized in that it is not formed in a region facing the partition wall (23).

[0013]

In the plasma display panel of the present invention, as shown in FIG. 1, the protective film 14 is not deposited on the surface region of the dielectric layer 13 corresponding to the vicinity of the tips of the partition walls 23.

Therefore, even if the gap A exists between the tip of the partition wall 23 and the surface of the dielectric layer 13, the secondary electrons are almost always emitted (during operation of the plasma display panel) from the vicinity of the tip of the partition wall 23. Since this does not occur, the coupling between adjacent discharge cells C becomes extremely weak. As a result, the plasma display panel of the present invention does not cause the above-mentioned malfunction such as excessive lighting during operation.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A plasma display panel according to an embodiment of the present invention will be described below with reference to FIGS.

1A and 1B are explanatory views of a plasma display panel according to an embodiment of the present invention. FIG. 1A is a schematic sectional view of the plasma display panel, and FIG.
It is a schematic plan view of a substrate.

In FIG. 1, 10 is a first substrate, 11 is a glass substrate which is a main material of the first substrate 10, and 12 is formed on the surface of the glass substrate 11, and voltages of different polarities are alternately applied. A counter electrode composed of the first electrode 12-1 and the second electrode 12-2, 13 is a dielectric layer which is attached to the surface of the glass substrate 11 and covers the counter electrode 12, and 14 is a surface of the dielectric layer 13. An MgO film formed by depositing MgO on the substrate, 20 is a second substrate, 21 is a glass substrate which is the main material of the second substrate 20, 22 is a counter electrode formed on the surface of the glass substrate 11, and 23 is a glass substrate. A comb-shaped partition wall formed between the counter electrodes 22 on the surface of 21; 24, a sealing material made of low melting point glass adhered to the periphery of the surface of the glass substrate 21; 25, the first electrode of the counter electrode 12. When the voltages having different polarities are alternately applied to the electrode 12-1 and the second electrode 12-2 to cause the discharge gas G in the discharge space S to emit light, the ultraviolet light included in this light is emitted. By absorbing a fluorescent material that generates fluorescence.

That is, as shown in FIG. 1, the plasma display panel of one embodiment of the present invention is similar to the conventional plasma display panel described with reference to FIG.
The first substrate 10 and the second substrate 20 whose surfaces are opposed to each other are sealed (sealed) with a sealing material 24, and the first substrate 10 and the second substrate 20 are sealed.
The discharge space S partitioned by the surface and the sealing material 24 is filled with a discharge gas G.

The MgO film 14 on the first substrate 10 is formed as shown in FIG.
In the conventional plasma display panel described with reference to FIG. 3, the MgO film 14 'of the first substrate 10' is configured to remove the region in the vicinity of the partition wall 23 of the second substrate 20.

Such an MgO film 14 is formed on the semi-finished first substrate 10 in which a vapor deposition mask 31 (see FIG. 2A) having an opening 31a corresponding to its planar shape is formed up to the dielectric layer 13. It can be easily formed by depositing MgO on the surface of the semi-finished first substrate 10 through the vapor deposition mask 31 after the close contact with the surface (see FIG. 2 (b)).

FIG. 2 is an explanatory view of the method of forming the MgO film, and FIG. 2 (a) is a schematic plan view of the vapor deposition mask,
FIG. 2B is a side sectional view schematically showing vapor deposition of MgO. In the plasma display panel of the embodiment of the present invention having the MgO film 14 as described above, the barrier ribs are
Even if a gap A exists between the tip of 23 and the surface of the dielectric layer 13, secondary electrons are hardly emitted from the vicinity of the tip of the partition wall 23 during its operation, so that the discharge cells C adjacent to each other are not discharged. The coupling becomes extremely weak, and the discharge cell C, which should not be lit (discharged) originally, is never lit (excessive lighting).

[0022]

As described above, the present invention makes it possible to provide a plasma display panel that operates stably.

Therefore, the plasma display panel of the present invention has high reliability because there is no erroneous display.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a plasma display panel according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a method for forming a MgO film.

FIG. 3 is an explanatory diagram of a conventional plasma display panel.

[Explanation of symbols]

 10, 10 ', the first substrate 11, the glass substrate (substrate) 12, the counter electrode (electrode) 13, the dielectric layer 14, 14', the MgO film (protective film) 20, the second substrate 21. The glass substrate 22, the counter electrode 23, the partition wall 24, the sealing material 25, the phosphor 31, the vapor deposition mask 31a, the opening

Claims (1)

[Claims] 1. A protective film (14) formed on the surface of a dielectric layer (13) adhered to the surface of a substrate (11) having a plurality of electrodes (12) arranged in parallel, and the electrode (12). In a plasma display panel including a plurality of counter electrodes (22) orthogonal to each other through a discharge space S and barrier ribs (23) alternately arranged in parallel, the protective film (14) includes the dielectric layer (13). ) Is formed only in a region of the surface of the dielectric layer (13) facing the counter electrode (22), and is not formed in a region of the surface of the dielectric layer (13) facing the partition wall (23). Plasma display panel.