JPH04280035A - Plasma display panel - Google Patents

Abstract

PURPOSE:To reduce a stray capacity between an X electrode and a Y electrode so as to save electric power consumption, and prevent deterioration of luminance by taking out display light without passing through a phosphor. CONSTITUTION:On a front glass substrate 11, a transparent X electrode 12 made of an NESA film is covered with a dielectric layer 13 in a stripe shape. An insulator layer 14 is formed in a stripe shape in the direction perpendicular to the X electrode 12. A Y electrode 15 covered with another dielectric layer 16 is formed on the insulator layer 14. The front glass substrate 11 is disposed opposite to a back glass substrate 17 having a phosphor 18 formed on the inner surface thereof, followed by air-tight sealing with a spacer held therebetween, and noble gas is sealed inside, thus manufacturing a panel.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC type color plasma display panel using orthogonal electrode type surface discharge, and more particularly to its electrode structure.

0002

2. Description of the Related Art Conventionally, this type of orthogonal electrode surface discharge AC type color plasma display panel is as shown in FIG.
X electrodes 32 are formed in a stripe shape on a rear glass substrate 31, and the X electrodes 32 are covered with a dielectric layer 33. Furthermore, Y electrodes 34 are formed in stripes on the dielectric layer 33 in a direction perpendicular to the X electrodes 32, and a dielectric layer 35 covers the Y electrodes 34. A spacer (not shown) for forming a discharge gap is arranged in the non-discharge region. Further, on the front glass substrate 36, phosphors 37 of three primary colors of R, G, and B are formed at positions facing each discharge area of the rear glass substrate 31.

In such an orthogonal electrode surface discharge AC type color plasma display panel, the X electrode 32 and the Y electrode
The structure was such that the phosphor 37 was excited using ultraviolet light generated by the discharge generated between the electrode 34 and the display light emitted from the front glass substrate 36 side. In addition, Figure 3
For convenience, the X and Y electrodes are not shown in a striped pattern, but one each is shown.

0004

Problems to be Solved by the Invention In this conventional orthogonal electrode surface discharge AC type color plasma display panel,
Since the electrode and the Y electrode are connected via a dielectric layer, there is a drawback that the stray capacity between the two electrodes becomes large and the power consumption becomes large.

In addition, since the discharge gap between the X and Y electrodes is controlled by adjusting the thickness of the dielectric layer, it is difficult to control and it is difficult to obtain a strong discharge.

Furthermore, since the light that passes through the phosphor is obtained from the phosphor side, the brightness decreases when the phosphor passes through the phosphor, and uneven brightness occurs due to uneven coating thickness of the phosphor, causing the color of the phosphor itself (white) to be displayed. There was a drawback that the contrast deteriorated because it became a background.

[0007]

[Means for Solving the Problems] The plasma display panel of the present invention includes an X electrode made of a transparent material coated with a dielectric, and a stripe formed on the X electrode in a manner perpendicular to the X electrode. The front substrate has a Y electrode formed thereon by being coated with a dielectric, and a rear substrate on which a phosphor is formed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings. FIG. 1 is a perspective sectional view of a first embodiment of the invention. A transparent X electrode 12 made of a NESA film is formed in a stripe shape on a front glass substrate 11 (only one is shown in the figure for simplicity), and is covered with a dielectric layer 13 mainly composed of low melting point glass. Ru. Next, an insulator layer 14 mainly composed of alumina is formed in a stripe shape in a direction perpendicular to the X electrode 12, and a Y electrode 15 mainly composed of Ag is formed on top of it in a similar pattern. It is covered with a dielectric layer 16 as the main component (like the X electrode 12, only one is shown in the figure). A phosphor 18 is formed on the rear glass substrate 17.

The rear glass substrate 17 and the front glass substrate 11 are sandwiched between a spacer (
Not shown. Note that this may be a barrier rib printed on the front and rear glass substrates), the periphery is hermetically sealed with frit glass, and a dischargeable rare gas such as He+Xe+Ne is sealed inside. Note that each pattern is N
All of the films are formed by a thick film printing method except that the ESA film is formed by a CVD method.

[0010] Now, when arbitrary X electrodes and Y electrodes of the plasma display panel formed in this manner are selected and a voltage is applied, it is possible to perform a lighting display by using the intersection as one display pixel. can. That is, a discharge occurs between the X and Y electrodes, and ultraviolet light is generated, which excites the phosphor 18 to emit light.

In the panel having the structure of the first embodiment, the dielectric layer 13 is made of low melting point glass with a relative dielectric constant of 10 to 15 and has a thickness of about 10 μm, and the insulating layer 14 is made of a low melting point glass with a relative dielectric constant of 3.
A pigment was added to the alumina-based material of No. 5 to 5 to make it black, and a film thickness of approximately 20 μm was formed. In the panel having the structure shown in FIG.
Compared to the panel prototyped similarly, the stray capacity between the X and Y electrodes in the first example is approximately 1/6
was able to be reduced. Here, the insulator layer 14 is
When set to a range of about 100 μm, the stray capacity is reduced to about 1/3 to 1/30.

Furthermore, since the display light is extracted without passing through the phosphor, unevenness in brightness can be reduced compared to the conventional panel having the structure shown in FIG. Furthermore, by making the insulator layer 14 sufficiently thinner than the display dot size, it was possible to reduce the decrease in brightness compared to the panel having the structure shown in FIG. 3. Conversely, the width of the insulator layer 14 is set to 10 to 5 of the display dot size.
By setting it to 0%, it was possible to achieve higher contrast than the panel with the structure shown in FIG. 3 without incurring the cost of using a filter.

FIG. 2 is a perspective sectional view of a second embodiment of the invention. In this embodiment, the dielectric layer 23 that covers the X electrode 22 is not formed solidly, but is coated in a striped pattern similar to the X electrode 22, thereby reducing stray capacitance between the X electrodes.

[0014]

[Effects of the Invention] As explained above, the present invention reduces the stray capacity between the X and Y electrodes to 1/3 to 1/30 of the conventional one by forming the Y electrode on the insulating layer. was able to significantly reduce power consumption. In addition, since the discharge gap between the X and Y electrodes can be adjusted by controlling the thickness of the insulator layer, an appropriate gap can be obtained.
A sufficiently strong discharge was obtained.

Furthermore, by controlling the width of the insulating layer in order to extract display light without transmitting it through the phosphor, it was possible to reduce the decrease in brightness or increase the contrast compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a perspective sectional view showing a first embodiment of an orthogonal electrode surface discharge AC type color plasma display panel of the present invention.

FIG. 2 is a perspective sectional view showing a second embodiment of the invention.

FIG. 3 is a perspective cross-sectional view of a conventional orthogonal electrode surface discharge AC type color plasma display panel.

[Explanation of symbols]

11, 21, 36 front glass substrate 12, 22,
32 X electrodes 13, 23, 33 Dielectric layers 14, 24 Insulator layers 15, 25, 34 Y electrodes 16, 26, 35 Dielectric layers 17, 27, 31 Rear glass substrate 18, 28,
37 Phosphor

Claims (1)

[Claims] 1. On a first substrate, at least one group of X electrodes that are parallel to each other and covered with a dielectric material, and a group of X electrodes that are orthogonal to the group of X electrodes that are covered with the dielectric material. The second substrate and the first substrate are faced to each other so as to maintain a gap necessary for discharge, and the periphery is hermetically sealed. In a plasma display panel filled with a rare gas capable of discharging, the X electrode group is formed of a transparent material, and the Y electrode group is formed by covering a striped insulator group with a dielectric material, and further A plasma display panel characterized in that a phosphor is formed inside the second substrate, and display light emission is obtained by using the first substrate side as a display surface.