JP3484715B2 - Plasma display panel - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly to a surface discharge type plasma display panel which operates stably. 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. It is. In FIG. 3, reference numeral 10 'denotes a first substrate, and reference numeral 11 denotes a first substrate.
A glass substrate 12, which is a 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 having different polarities are alternately applied. A counter electrode,
Reference numeral 13 denotes a dielectric layer that covers 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; Is a second substrate, 21 is a glass substrate which is a 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. 24 is a sealing material made of low-melting glass that is applied around the surface of the glass substrate 21 in a circular shape. 25 is a first electrode 12-1 and a second electrode 12 of the counter electrode 12. When the discharge gas G in the discharge space S emits light by alternately applying voltages having different polarities to -2, the fluorescent material absorbs ultraviolet light contained in the light to generate fluorescence. That is, in the conventional plasma display panel, as shown in FIG. 3A, a first substrate 10 'and a second substrate 20 whose surfaces are opposed to each other are sealed (sealed) with a sealing material 24. Then, a discharge gas G composed of, for example, a mixed gas of a neon gas and a xenon gas is filled in a discharge space S defined by the surfaces of the first substrate 10 'and the second substrate 20 and the sealing material 24. Make up. Meanwhile, 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 on almost the entire surface of the dielectric layer 13 to a thickness of about 5000 °. [0007] In this specification, the same parts, the same materials and the like are denoted by the same reference numerals throughout the drawings. [0008] The MgO film 14 '
Protects the dielectric layer 13 from being damaged by the impact of ions (Ne ⁺ and Xe ⁺ ) formed in the discharge space S when the plasma display panel is operated, and at the same time, protects the secondary electrons when the ions collide. It is well known that the emission ratio γ is large and has the effect of reducing the discharge starting voltage and the like of the plasma display panel. By the way, in the conventional plasma display panel, the MgO film 14 'is deposited on almost the entire surface of the dielectric layer 13 as described above. Secondary electrons are also actively emitted from the neighboring MgO film 14 '. Therefore, the surface of the MgO film 14 'and the partition 23
When a gap A where the mutual movement of electrons is relatively free exists between the discharge cell C and the tip of the plasma display panel, the coupling between the discharge cells C adjacent to each other is strengthened via the partition wall 23, and the excess light is turned on when the plasma display panel is operated. And other malfunctions. The present invention has been made to solve such a problem, and an object of the present invention is to provide a surface discharge type plasma display panel which operates stably. As shown in FIG. 1, the object is to provide a plurality of surface discharge electrodes 12 on one substrate 11, a dielectric layer 13 covering the electrodes 12, and a protective film. 14 and a plurality of opposing electrodes 22 orthogonal to the surface discharge electrode 12 on the other substrate 21 and partition walls 23 formed between the opposing electrodes to partition the discharge space S. in the plasma display panel, the protective film 14, the plurality in the area between the partition wall was dividing the partition wall facing the region on the dielectric layer
This is achieved by a plasma display panel characterized by being formed in a strip shape so as to be orthogonal to the surface discharge electrode . 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 tip of the partition wall 23. Therefore, even if there is a gap A between the tip of the partition 23 and the surface of the dielectric layer 13, secondary electrons are hardly emitted from the vicinity of the tip of the partition 23 (during operation of the plasma display panel). Since this does not occur, the coupling between the adjacent discharge cells C becomes extremely weak. As a result, the plasma display panel of the present invention does not cause a malfunction such as an excessive lighting described above in operation. 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. FIG. 1 is an explanatory view 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.
FIG. 3 is a schematic plan view of a substrate. In FIG. 1, reference numeral 10 denotes a first substrate, 11 denotes a glass substrate which is a main material of the first substrate 10, and 12 denotes a first substrate formed on the surface of the glass substrate 11 to which voltages having 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 applied to the surface of the glass substrate 11 to cover the counter electrode 12, and 14 is a surface of the dielectric layer 13 An MgO film formed by depositing MgO on the second substrate; 20, a second substrate; 21, a glass substrate, which is a main material of the second substrate 20; 22, a counter electrode formed on the surface of the glass substrate 11; A comb-shaped partition formed between the opposing electrodes 22 on the surface of 21, a sealing material 24 made of low-melting glass adhered to the periphery of the surface of the glass substrate 21, and a first member 25 of the counter electrode 12 When voltages having different polarities are alternately applied to the electrode 12-1 and the second electrode 12-2, and the discharge gas G in the discharge space S emits light, the ultraviolet light contained in this light is emitted. By absorbing a fluorescent material that generates fluorescence. That is, as shown in FIG. 1, the plasma display panel according to 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.
Are formed by filling a discharge gas G into a discharge space S defined by the surface and the sealing material 24. The MgO film 14 of the first substrate 10 is formed as shown in FIG.
In the conventional plasma display panel described with reference to FIG. 2, the region near the partition 23 of the second substrate 20 of the MgO film 14 'of the first substrate 10' is removed. The MgO film 14 is formed by forming a deposition mask 31 (see FIG. 2A) having an opening 31a corresponding to the planar shape of the semi-finished first substrate 10 on which the dielectric layer 13 is formed. After being adhered to the surface, MgO can be easily formed on the surface of the semi-finished first substrate 10 by vapor deposition of MgO via a vapor deposition mask 31 (see FIG. 2B). FIG. 2 is an explanatory view of a method of forming an MgO film, and FIG. 2A is a schematic plan view of an evaporation mask,
FIG. 2B is a side sectional view schematically showing the deposition of MgO. In the plasma display panel according to one embodiment of the present invention having the MgO film 14 as described above,
Even if there is a gap A between the tip of the dielectric layer 13 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 the operation. The coupling becomes extremely weak, and the discharge cells C, which should not be lit (discharged) originally, are not lit (excessive lighting). As described above, the present invention makes it possible to provide a plasma display panel that operates stably. Therefore, the reliability of the plasma display panel of the present invention is high because there is no erroneous display.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a plasma display panel according to an embodiment of the present invention. FIG. 2 is an explanatory view of a method of forming an MgO film. FIG. 3 is a conventional plasma display. Description of panel [Explanation of reference numerals] 10 and 10 'are first substrates 11, glass substrates (substrates) 12, counter electrodes (electrodes) 13, dielectric layers 14, 14' are MgO films (protection). 20) a second substrate 21, a glass substrate 22, a counter electrode 23, a partition 24, a sealing material 25, a phosphor 31, a deposition mask 31a, an opening

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01J 11/02 H01J 11/00

Claims (1)

(57) have a a [Claims 1. A dielectric layer covering the plurality of surface discharge electrode and the electrodes on the one substrate and the protective film, each surface on the other substrate In a plasma display panel having a plurality of counter electrodes orthogonal to a discharge electrode and a partition formed between the respective counter electrodes and partitioning a discharge space, the protective film includes a partition on the dielectric layer; said plurality of surface discharge electrodes in the regions between the respective partition walls were divided opposing areas
A plasma display panel, which is formed in a belt shape so as to be orthogonal .