Surface-discharge-type plasma display panel

Abstract

For improvement in the performance of a PDP, a dielectric layer, deposited on the inner face of the front glass substrate of the PDP and covering row electrode pairs, is formed of a dielectric material having a relative dielectric constant of 9 or less, and a protective layer overlying the dielectric layer includes a magnesium oxide crystal causing a cathode-luminescence emission having a peak within a wavelength range of 200 nm to 300 nm upon excitation by electron beams, and discharge gas filling the discharge space includes 10% or more xenon by volume.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view illustrating an embodiment of the present invention.

FIG. 2 is a sectional view taken along the V-V line in FIG. 1.

FIG. 3 is a sectional view taken along the W-W line in FIG. 1.

FIG. 4 is a sectional view illustrating a crystalline magnesium layer formed on a thin-film magnesium layer in the embodiment.

FIG. 5 is a sectional view illustrating a thin-filmmagnesium layer formed on a crystalline magnesium layer in the embodiment.

FIG. 6 is a SEM photograph of a magnesium oxide single crystal having a cubic single-crystal structure.

FIG. 7 is a SEM photograph of a magnesium oxide single crystal having a cubic polycrystal structure.

FIG. 8 is a graph showing the residual image characteristics of a conventional PDP for comparison.

FIG. 9 is a graph showing the residual image characteristics of the PDP of the embodiment.

FIG. 10 is a graph showing a comparison between the discharge delay characteristics of the PDP of the embodiment and of a conventional PDP.

FIG. 11 is another graph showing a comparison between the discharge delay characteristics of the PDP of the embodiment and of a conventional PDP.

FIG. 12 is a graph showing a comparison between the light-emitting efficiencies of the PDP of the embodiment and of a conventional PDP.

FIG. 13 is a graph showing the relationship between the particle size of a magnesium oxide single-crystal and the wavelength of a CL emission in the embodiment.

FIG. 14 is a graph showing the relationship between the particle size of a magnesium oxide single-crystal and the intensity of a CL emission at 235 nm in the embodiment.

FIG. 15 is a graph showing the state of the wavelength of a CL emission from a magnesium oxide layer formed by vapor deposition.

FIG. 16 is a graph showing the relationship between the discharge delay and the peak intensity of a CL emission at 235 nm from the magnesium oxide single crystal.

FIG. 17 is a graph showing a comparison between the discharge delay characteristics of the case when the protective layer is constituted only of the magnesium oxide layer formed by vapor deposition and that when the protective layer has a double layer structure made up of a crystalline magnesium layer and a thin-film magnesium layer formed by vapor deposition.

Claims

1. A surface-discharge-type plasma display panel, comprising: a pair of substrates facing each other across a discharge space;row electrode pairs and column electrodes provided between the pair of substrates, placed at a distance from each other, and extending in directions at right angles to each other to form unit light emission areas in positions corresponding to intersections in the discharge space;a dielectric layer overlying the row electrode pairs; anda protective layer overlying the dielectric layer and facing the unit light emission areas, whereinthe discharge space is filled with a discharge gas,the dielectric layer is formed of a dielectric material having a relative dielectric constant of 9 or less, andthe protective layer includes a magnesium oxide crystal that causes a cathode-luminescence emission having a peak within a wavelength range of 200 nm to 300 nm upon excitation by electron beams.

2. A surface-discharge-type plasma display panel according to claim 1, wherein the dielectric layer is formed of a leadless glass material having a relative dielectric constant of 8 or less.

3. A surface-discharge-type plasma display panel according to claim 1, wherein the dielectric layer is formed of a Zn—B—Si alkali-containing glass material having a relative dielectric constant of 7 or less.

4. A surface-discharge-type plasma display panel according to claim 3, wherein the relative dielectric constant of the dielectric material in the dielectric layer is 6.8.

5. A surface-discharge-type plasma display panel according to claim 1, wherein the protective layer comprises a thin-film magnesium oxide layer deposited by vapor deposition or by spattering, and a crystalline magnesium oxide layer including a magnesium oxide crystal and deposited and laminated on the thin-film magnesium oxide layer.

6. A surface-discharge-type plasma display panel according to claim 1, wherein the magnesium oxide crystal is a magnesium oxide single crystal produced by a vapor-phase oxidization technique.

7. A surface-discharge-type plasma display panel according to claim 1, wherein the magnesium oxide crystal causes a cathode-luminescence emission having a peak within a wavelength range of 230 nm to 250 nm.

8. A surface-discharge-type plasma display panel according to claim 1, wherein the magnesium oxide crystal has a particle diameter of 2000 or more angstroms.

9. A surface-discharge-type plasma display panel, comprising: a pair of substrates facing each other across a discharge space;row electrode pairs and column electrodes provided between the pair of substrates, placed at a distance from each other, and extending in directions at right angles to each other to form unit light emission areas in positions corresponding to intersections in the discharge space;a dielectric layer overlying the row electrode pairs; anda protective layer overlying the dielectric layer and facing the unit light emission areas, whereinthe discharge space is filled with a discharge gas,the dielectric layer is formed of a dielectric material having a relative dielectric constant of 9 or less,the protective layer includes a magnesium oxide crystal that causes a cathode-luminescence emission having a peak within a wavelength range of 200 nm to 300 nm upon excitation by electron beams, andthe discharge gas includes 10% or more xenon by volume.

10. A surface-discharge-type plasma display panel according to claim 9, wherein the dielectric layer is formed of a leadless glass material having a relative dielectric constant of 8 or less.

11. A surface-discharge-type plasma display panel according to claim 9, wherein the dielectric layer is formed of a Zn—B—Si alkali-containing glass material having a relative dielectric constant of 7 or less.

12. A surface-discharge-type plasma display panel according to claim 11, wherein the relative dielectric constant of the dielectric material in the dielectric layer is 6.8.

13. A surface-discharge-type plasma display panel according to claim 9, wherein the discharge gas includes 15% xenon by volume.

14. A surface-discharge-type plasma display panel according to claim 9, wherein the protective layer comprises a thin-film magnesium oxide layer deposited by vapor deposition or by spattering, and a crystalline magnesium oxide layer including a magnesium oxide crystal and deposited and laminated on the thin-film magnesium oxide layer.

15. A surface-discharge-type plasma display panel according to claim 9, wherein the magnesium oxide crystal is a magnesium oxide single crystal produced by a vapor-phase oxidization technique.

16. A surface-discharge-type plasma display panel according to claim 9, wherein the magnesium oxide crystal causes a cathode-luminescence emission having a peak within a wavelength range of 230 nm to 250 nm.

17. A surface-discharge-type plasma display panel according to claim 9, wherein the magnesium oxide crystal has a particle diameter of 2000 or more angstroms.