JP2001307646A - Gas discharge panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of realizing an improvement in effective emission and brightness, one of the most important issues for a PDP, and preventing erroneous discharge. SOLUTION: A gas discharge panel that has at least a pair of display electrodes on a substrate and a region divided for a pair of the display electrodes corresponding to a cell of light emission. A pair of the display electrodes comprise two bus lines extending in a horizontal direction and plural protruding portions inside that are arranged in protruding toward an inside portion opposing to the said two bus lines. The plural inside protruding portions are designed to be a structure protruding alternatively in two prices from two bus lines, giving in such display properties as no cross-talk and highly bright and effective quality.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas discharge panel used for a display device or the like, and more particularly to an improvement in a display electrode of a plasma display panel.

[0002]

2. Description of the Related Art In recent years, PDPs have been positioned as the leading devices of large flat panel displays, and are also suitable for displaying moving images. is there. In the future, it is expected that higher image quality and higher efficiency will be promoted.

In a conventional plasma display panel (hereinafter referred to as a PDP), as shown in FIG. 6, a front plate 101 and a back plate 106 are opposed to each other, and an inner surface of the front plate is adjacent to the front plate. A plurality of pairs of two parallel display electrodes 103 forming a pair, and a 40 μm-thick dielectric layer 104 made of low dielectric glass that covers the display electrodes 105.
8 as a protective film 105 on the surface of the dielectric layer 104.
An MgO film of Å is formed uniformly over the entire area of the screen. As a method for forming the MgO film, an evaporation method, a sputtering method, or the like is generally used.

On the other hand, on the inner surface of the back plate 106, partition walls 110 and data electrodes 108 that partition the discharge space are arranged in parallel, and inside the cells partitioned by the individual partition walls 110,
The phosphor 111 is applied. Then, the front plate 101
After this and the back plate 106 are overlapped facing each other, the periphery thereof is sealed, the inside of the discharge space is evacuated, and a neon mixed gas containing several volume% of xenon is sealed.

Further, recently, erroneous discharge between individual discharge cells isolated between partition walls, noise reduction due to vibration between the partition walls and the front plate, increase in internal gas pressure and expansion of the panel under low pressure. It has been proposed to apply a low-melting glass to the upper end of the partition wall and to join the partition wall and the front plate with the low-melting glass for the purpose of preventing the occurrence of cracks (JP-A-5-334).
956, JP-A-9-259754).

[0006] The PDP 114 thus constructed
By applying a voltage to the data electrode 108 and the display electrode 103 at an appropriate timing, a discharge occurs in a space 112 defined by a partition 110 corresponding to a display pixel,
Ultraviolet rays are generated by xenon gas. An image can be displayed by emitting visible light from the phosphor excited by the ultraviolet light.

The PDP has a simple surface discharge type cell structure in which two substrates are overlapped as described above, so that even if the screen is enlarged, the depth dimension and weight increase like a CRT. It is also excellent in that there is no problem that the viewing angle is limited unlike LCD (liquid crystal display).

[0008]

Among various purposes, it is very important to improve the display performance of a PDP. In addition, today, there is a strong demand for electric appliances that consume as little power as possible, and there is a strong demand for gas discharge panels such as PDPs to reduce power consumption during operation. In order to meet this demand, it is strongly desired to improve the luminous efficiency and increase the luminance by the discharge which largely affects the performance of the PDP.

The principle of light emission of a PDP is basically the same as that of a fluorescent lamp. By generating glow discharge, ultraviolet rays are generated from Xe to excite the phosphor to emit light. But,
Since the conversion efficiency of this discharge energy to ultraviolet light and the conversion efficiency of phosphor to visible light are low, it is difficult to obtain high brightness like fluorescent lamps. It is said to be about 0.2% (Optical Technology Contact V01.34, No. 1, P25, '9
6).

In recent years, various efforts have been made to improve the luminous efficiency. For example, a mixed gas of three components of argon-neon-xenon is used (Japanese Patent Publication No. 5-5).
No. 1133), an attempt to devise the composition of a discharge gas, such as using a mixed gas of three components of helium-neon-xenon (Japanese Patent No. 2616538), an attempt to increase the partial pressure of xenon gas, or sealing in a PDP Attempts have been made to increase the gas pressure of the discharge gas to be discharged. Furthermore, recently, a general method is to divide a display electrode into a bus electrode as a row electrode and an auxiliary electrode, and to use a transparent electrode as the auxiliary electrode to increase the efficiency of extracting light emitted by discharge in each cell. This is because when electrodes are wired in the row and column directions as a normal panel, the wiring resistance has a significant effect on power consumption and display characteristics. It aims at the effect of raising. In addition, it has been used to reduce the electric capacity of the cell by processing the shape of the transparent electrode having the discharge gap, thereby reducing the power consumption of the panel. 22772).

[0011] These efforts have hitherto reduced the luminous efficiency to less than 1 lm / W, but the luminous efficiency has finally exceeded the value at the experimental level. However, this luminous efficiency is still less than half of that of a conventional CRT, and further improvement in luminous efficiency is desired until a PDP becomes a full-scale large-screen display.

At present, it is still insufficient to increase the luminance as well as to improve the luminous efficiency. In general, to increase the luminance, it is conceivable to increase the driving voltage, the driving frequency, and the like. However, the power consumption increases, which is not practical. Generally, increasing the light extraction efficiency is most effective.

An object of the present invention is to satisfy the most important problems of the PDP, namely, improvement of luminous efficiency and higher luminance.

[0014]

An attempt to improve the luminous efficiency and increase the luminance has been made by Japanese Patent Application Laid-Open No. 11-8673.
As shown in Japanese Patent Publication No. 9 (1999), a pair of discharge electrodes formed to project in one direction from display electrodes formed in parallel on a glass substrate at regular intervals to facilitate cell discharge, respectively. It has been proposed to arrange them alternately, but with this structure, high brightness can be achieved, but erroneous discharge occurs between adjacent cells, causing problems such as crosstalk and deteriorating display performance. Would be.

In order to achieve this object, a gas discharge panel according to the present invention has at least a pair of display electrodes disposed on a substrate, and a region defined by the pair of display electrodes corresponds to a cell for light emission. In the gas discharge panel, a pair of display electrodes are composed of two bus lines extending in a row direction,
A plurality of inner protrusions protrudingly arranged on opposed inner portions of the two bus lines, wherein the plurality of inner protrusions are alternately projected from the two bus lines by two lines at a time. It is characterized by that. Here, the inner protrusion is
In terms of cost reduction, a metal electrode is preferred, but a transparent electrode further improves display performance.

According to a second gas discharge panel of the present invention, there is provided a gas discharge panel in which at least a pair of display electrodes are provided on a substrate, and regions defined by the pair of display electrodes correspond to cells for light emission. The pair of display electrodes include two bus lines extending in the row direction, and a plurality of inner protrusions protrudingly arranged on opposing inner portions of the two bus lines. The inner protruding portions are alternately protruded by two from the two bus lines, and the front end portions have protruding portions in the row direction with respect to the adjacent inner protruding portions protruding from the other bus line. It is characterized by having. Here, the inner protruding portion is preferably a metal electrode in terms of cost reduction, but if it is a transparent electrode, the display performance is further improved.

According to a third gas discharge panel of the present invention, a plurality of pairs of display electrodes are arranged on one of a pair of substrates facing each other with a discharge space therebetween, and the display electrode is provided on the other facing substrate surface. In a gas discharge panel in which a plurality of partition walls are arranged at regular intervals in a direction perpendicular to the display electrodes, a pair of display electrodes includes two bus lines extending in a row direction and the two bus lines. A plurality of inner protrusions protrudingly arranged on opposing inner portions of the bus line, wherein the plurality of inner protrusions are alternately protruded from the two bus lines by two lines each; Characterized in that the partition is disposed between the inner protruding portions. Here, the inner protruding portion is preferably a metal electrode in terms of cost reduction, but if it is a transparent electrode, the display performance is further improved.

A fourth invention according to the present invention is the third gas discharge panel according to the present invention, wherein a front end portion of said inner protruding portion is arranged to be adjacent to said inner protruding portion protruding from said other bus line. It has a protruding portion in the row direction. Here, the inner protruding portion is preferably a metal electrode in terms of cost reduction, but if it is a transparent electrode, the display performance is further improved.

According to a fifth aspect of the present invention, there is provided a gas discharge panel according to the present invention; a display electrode driving circuit connected to each pair of row electrodes for driving the gas discharge panel; And a control unit for controlling each of the display electrode driving circuit and the address electrode driving circuit. Accordingly, a gas discharge display device having higher efficiency and higher luminance than the conventional PDP can be provided.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a plasma display panel (PDP) according to the present invention will be described with reference to the drawings.

(Embodiment) FIG. 1 shows a PD according to the present invention.
FIG. 2 is a plan view showing a display electrode structure of a front plate of P, and FIG.
1 is a perspective view showing a PDP according to the present invention.

As shown in FIG. 1, the PDP of the present invention has a display electrode 103 as a metal electrode on a front glass 102.
To form Bus line 103 as two display electrodes
The width of a and 103b is 100 μm,
The width of a and 113b is 50 μm. The gap between the inner protrusion and the electrode on the opposite side is 140 μm. The discharge gap between the inner protrusions is 70 μm. Further, it is necessary to make the distance between the adjacent bus lines with the adjacent cells wider than that between the discharge gaps. Here, it is 150 μm.

On the front plate formed with such an electrode configuration, a dielectric is 30 μm, and a MgO film is 0.5 μm as a protective film.
And complete the front panel.

On the other hand, data electrodes and partitions are formed on the rear plate glass so as to be parallel to each other by the manufacturing method described in the background art, and a phosphor is formed on the wall surfaces of the partitions to complete the structure.

The front plate and the back plate are overlapped with each other facing each other, the inside is evacuated to a vacuum, and a mixed gas of 95% by volume of neon and 5% by volume of xenon is filled until the pressure becomes 66.5 kPa, thereby completing the PDP. Let it.

As a comparative example, as shown in FIG. 3, the inner protruding portions are alternately arranged one by one from the bus line, and a panel having the same structure as the others is manufactured. While the erroneous discharge is repeated between the PDPs, the PDP of the present invention exhibits high luminance and high efficiency display characteristics without any erroneous discharge.

It is needless to say that the present invention is not limited to the dimensions of the electrodes in the present embodiment.

Further, in this embodiment, a metal electrode is used for the inner protruding portion. However, a transparent electrode can provide a PDP with higher luminance and higher efficiency.

The same effect can be obtained even when the tip of the inner protruding portion further has a protruding portion in the row direction with respect to the adjacent inner protruding portion protruding from the other bus line as shown in FIG. Is obtained. In this case, an arbitrary discharge gap can be set even when the cell size is changed because the tip portion becomes a discharge gap.

The PDP of the present invention has a display electrode driving circuit for maintaining discharge, an address electrode driving circuit for selecting a pixel, and a control unit for controlling supply of image information to each pixel. Configure the device (Fig. 5)
Since high luminous efficiency and high luminance can be obtained as compared with the conventional PDP, the display performance is equal to or higher than that of the conventional PDP, the number of components used can be reduced, and the weight and cost can be reduced by using a low voltage element.

[0031]

As described above, according to the present invention, a pair of display electrodes are arranged so as to protrude from two bus lines extending in the row direction and from opposing inner portions of the two bus lines. A plurality of inner projections, and the plurality of inner projections are alternately projected from the two bus lines by two, so that there is no erroneous discharge between adjacent bus lines. A PDP having high luminance and high efficiency display performance can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view showing a display electrode structure of a front panel of a PDP according to a first embodiment.

FIG. 2 is a perspective view showing a PDP according to the present invention.

FIG. 3 is a plan view showing a display electrode structure of a front panel of a conventional PDP.

FIG. 4 is a plan view showing another display electrode structure of the PDP according to the first embodiment.

FIG. 5 is a schematic diagram of a gas discharge display device in which a driving circuit and a control unit are combined with the PDP of the present invention.

FIG. 6 is a schematic view showing a main part of a conventional PDP.

[Explanation of symbols]

 REFERENCE SIGNS LIST 101 front plate 102 front glass 103 display electrode 103 a, 103 b bus line 113 a, 113 b inner protrusion 123 a, 123 b tip 104 dielectric layer 105 protective film 106 back plate 107 back glass 108 data electrode 109 back plate dielectric 110 partition 111 fluorescence Body 114 PDP panel 201 Control unit 202 Display electrode drive circuit 203 Address electrode drive circuit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C040 FA01 FA04 GB03 GB14 GC02 MA02 MA03 MA17 5C058 AA11 AB06 BA05 BA10 BA26 BA35 5C080 AA05 BB05 DD03 DD09 HH02 HH04 JJ06 5C094 AA10 AA22 AA24 AA48 AA53 DBA15 EA04 EA05 EA10 EB02 EC04 FA01 FB12 FB15 GA10

Claims (7)

[Claims] 1. A gas discharge panel in which at least one pair of display electrodes is provided on a substrate, and a region defined by the pair of display electrodes is made to correspond to a cell for light emission. A plurality of bush lines extending in two directions, and a plurality of inside protrusions protrudingly arranged at opposing inside portions of the two bus lines, wherein the plurality of inside protrusions are A gas discharge panel characterized by being projected alternately two by two from two bus lines. 2. A gas discharge panel in which at least one pair of display electrodes is provided on a substrate, and a region defined by said pair of display electrodes is made to correspond to a cell for light emission. A plurality of bush lines extending in two directions, and a plurality of inside protrusions protrudingly arranged at opposing inside portions of the two bus lines, wherein the plurality of inside protrusions are Two bus lines alternately protrude from each other, and the tip of the inner protruding portion has a protruding portion in the row direction with respect to the adjacent inner protruding portion protruding from the other bus line. Characterized gas discharge panel. 3. A plurality of pairs of display electrodes are provided on one of a pair of substrates opposed to each other with a discharge space interposed therebetween, and the other substrate surface has a predetermined interval in a direction perpendicular to the display electrodes. In a gas discharge panel in which a plurality of partition walls are provided, a pair of display electrodes are provided so as to protrude from two bus lines extending in the row direction and opposing inner portions of the two bus lines. A plurality of inner protrusions, wherein the plurality of inner protrusions are alternately projected two by two from the two bus lines, and the partition wall is disposed between the two inner protrusions. A gas discharge panel. 4. The gas discharge according to claim 3, wherein the tip of the inner protrusion has a protrusion in the row direction with respect to the adjacent inner protrusion protruding from the other bus line. panel. 5. The gas discharge panel according to claim 1, wherein said inner protrusion is a metal electrode. 6. The apparatus according to claim 1, wherein said inner protrusion is a transparent electrode.
A gas discharge panel according to any one of claims 1 to 4. 7. A gas discharge panel according to any one of claims 1 to 6, a display electrode drive circuit connected to each pair of row electrodes for driving said gas discharge panel, and each of said gas discharge panels. A gas discharge type display comprising: an address electrode driving circuit connected to an address electrode for selecting a pixel; and a control unit for controlling each of the display electrode driving circuit and the address electrode driving circuit. apparatus.