KR100225903B1 - Plasma address panel for plasma address liquid crystal displaying apparatus - Google Patents

Abstract

An electrode and partition structure of a plasma addressed panel used in a plasma addressed liquid crystal display. In the plasma address panel of the present invention, the partition wall for separating the plasma channel is made of a conductive material such as metal to serve as an anode and a cathode for causing gas discharge in the plasma channel, and a separate transparent electrode is formed on the bottom of the plasma channel. It is used as a column electrode. In addition, a resistor is formed between the transparent electrode and the partition wall so that the gas discharge occurs uniformly. By using the barrier rib structure and the electrode structure of the present invention, since the anode and the cathode can form a structure that does not block light from the backlight light source in the plasma address liquid crystal display device, it is possible to prevent the screen from becoming dark. In addition, since a conductive material such as metal is used, the partition wall can be manufactured by the pole casting method, and the screen of the plasma address liquid crystal display panel can be made large. In addition, since the plasma channel can be made uniform for each pixel by a resistor formed in the partition wall, the brightness of the screen can be made uniform for each pixel.

Description

Plasma address panel for plasma address liquid crystal display

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma addressed liquid crystal display, and more particularly to an electrode and a partition structure of a plasma address panel used in a plasma addressed liquid crystal display.

BACKGROUND ART As a display device used for a television, a computer monitor, a billboard, and the like, research on a flat panel display device has been actively conducted. Such flat panel displays typically include a thin film transistor liquid crystal display (TFT-LCD), an electro-luminiscent display (ELD), a plasma display panel, Vacuum fluorescent displays (VFDs), field emission displays (FEDs), and plasma addressed liquid crystal displays. In general, a thin film transistor liquid crystal display device can implement a display at a high resolution, but there are disadvantages in that it is not easy to manufacture a large screen due to a complicated structure, and a plasma display panel is generally simple in structure and easy to manufacture. One disadvantage is that the resolution is poor. The plasma address liquid crystal display combines the advantages of the plasma display panel and the thin film transistor liquid crystal display as described above, and the plasma generated in the discharge space at the rear of the liquid crystal panel performs a switching function for driving each pixel of the liquid crystal panel. I did it. With such a structure, it is possible to obtain a display device having a high resolution and a simple structure and capable of producing a large screen.

Hereinafter, a plasma address liquid crystal display device according to the related art will be described with reference to the accompanying drawings. 1 is a cross-sectional view schematically showing a cross section of a conventional plasma address liquid crystal display device, and FIG. 2 is a schematic perspective view of a plasma address panel used in the conventional plasma address liquid crystal display device shown in FIG. Referring to Fig. 1, the conventional plasma address liquid crystal display device 100 is composed of a transparent row electrode 1 made of a transparent electrode, a color filter 2, a liquid crystal 3, and a first transparent glass substrate 4; The liquid crystal panel 20, the plasma address panel 200, and the backlight 10 are included. 1 and 2, the plasma address panel 200 includes a plasma channel 5 and an insulator, which serve as column electrodes, and partition walls 6 for separating each plasma channel to prevent mutual interference. ), An anode 7, a cathode 8, and a second transparent glass substrate 9 for generating plasma discharge. The plasma channel 5 contains a reaction gas, for example a mixed gas of neon (Ne) and xenon (Xe). The anode 7 and the cathode 8 are formed in parallel with the partition 6 between each partition 6. When a high voltage is applied between the anode 7 and the cathode 8, gas discharge occurs in the reaction gas contained in the plasma channel 5 to generate plasma. Subsequently, when a voltage is applied between any one of the anode 7 and the cathode 8 and the transparent row electrode 1, the plasma channel 5 serving as a column electrode below the first transparent glass substrate 4 is formed. An electric charge is formed on the top. When this charge drives the liquid crystal 3 (adjust the alignment direction of the liquid crystal molecules), light can pass through the liquid crystal, so that the light from the backlight 10 passes through the second glass substrate 9 and the liquid crystal 3 Is displayed through). In this case, since the row electrode 1 and the plasma channel 5 serving as the column electrode are orthogonal to each other, when a voltage is applied to both the row electrode 1 and the plasma channel 5, only the corresponding pixel is applied. It is possible to display through liquid crystal, and display is not performed when voltage is not applied to either the row electrode or the plasma channel. Control of the row electrodes and column electrodes for driving the desired pixels is performed by an external control circuit (not shown) connected to the plasma address liquid crystal display device.

However, the plasma address panel of the conventional plasma address liquid crystal display as described above has the disadvantage that the anode 7 and the cathode 8 block the light from the backlight 10 to darken the screen. In addition, the glass partition 6 should be formed by repeating printing or etching a glass substrate on the second transparent glass substrate 9, but when manufacturing a large screen, it was not easy to produce the partition uniformly. . In addition, in one pixel, when the gas is discharged by applying a voltage to the conventional anode 7 and the cathode 8, a large amount of current flows to one point to distribute the uniform plasma channel 5 evenly distributed. It is difficult to form, and thus there is a problem that the brightness of the screen is not uniform for each pixel because the conductivity of the plasma channel 5 is not uniform.

Accordingly, an object of the present invention is to provide an anode and a cathode which do not block light from a backlight light source in a plasma address liquid crystal display panel.

It is another object of the present invention to provide a plasma address liquid crystal display panel which is easy to manufacture on a large screen.

Another object of the present invention is to provide a uniform plasma channel in a plasma address panel of a plasma address liquid crystal display panel.

1 is a schematic cross-sectional view of a plasma address liquid crystal display device of the prior art;

FIG. 2 shows a plasma address panel used in the plasma address liquid crystal display device of the prior art shown in FIG.

3 shows a plasma address panel in accordance with the present invention;

Explanation of symbols for the main parts of the drawings

1: transparent row electrode

2: color filter

3: liquid crystal

4: first transparent glass substrate

20: liquid crystal display panel

5: plasma channel

6: barrier rib

7: anode

8: cathode

9: second transparent glass substrate

10: back light

11: resistive layer

12: transparent column electrode

In order to achieve the object of the present invention, in the present invention, formed between the first and second glass substrates, the first and second glass substrates spaced apart by a predetermined distance from each other and formed by the first and second glass substrates. The space is divided into a plurality of plasma channels and formed of a conductive material so that a plurality of partition walls serving as anodes and cathodes in the plasma channel are disposed in parallel with the partition walls on the second glass substrates 9 of the plurality of plasma channels. The plasma channel includes a plurality of transparent column electrodes which serve as electrodes of the plasma channel and allow light to pass therethrough, and the plasma channel is filled with a gas to generate a gas discharge therein in response to a voltage applied to the anode and the cathode. A plasma address panel for an address liquid crystal display device is provided.

Hereinafter, an embodiment of the present invention will be described with reference to FIG. 3. 3 is a diagram illustrating a plasma address panel used in the plasma address liquid crystal display device according to the present invention. The plasma address panel 300 of the present invention includes first and second glass substrates 4 and 9, partition walls 6, 7 and 8, and a transparent column electrode 12. In the present embodiment, the plasma address of the prior art shown in FIG. 2 except that the partition wall 6 simultaneously performs the functions of the anode 7 and the cathode 8 and the column electrode 12 is formed transparently. Similar to the panel. In the plasma address panel 300 of the present invention, the partition wall 6 is made of a conductive material, preferably a metal material, and serves as the anode 7 and the cathode 8 to cause gas discharge in the plasma channel 5 and the plasma channel. At the same time, the original role of preventing interference between the two. Since the addressing of the pixels is performed by an external (not shown) control circuit, a pair of partitions 6 serving as the anode 7 and the cathode 8 of the pixel selected by the addressing, even if the partition 6 is made of a conductive material. ), No voltage is applied and interference between pixels does not occur or adjacent pixels are turned on at the same time. In addition, a transparent column electrode 12 is formed on the bottom surface of the plasma channel 5 to apply a voltage to the plasma channel 5, but is formed of a transparent material unlike the conventional anode 7 and the cathode 8. Since the light source from the backlight 10 (FIG. 1) is not blocked, the screen does not darken.

The partition 6 of the present invention is manufactured by electro-forming. That is, after forming an insulator as high as the height of the partition 6 on the second glass substrate 9, etching the insulator of the part where the partition 6 is to be formed, and then etching the insulated part into a conductive material (preferably , A metal material), and removes the insulator in the remaining part so that only the partition wall 6 remains. Therefore, the conventional partition wall 6 has to be formed on the second glass substrate 9 (FIG. 1) by repeating printing or etching the glass substrate as described above, so that the production of a large screen is not easy. However, since the partition 6 of the present invention is manufactured by the above-described pole casting method, there is an advantage in that it is easy to manufacture a large screen.

In the embodiment of the present invention, the resistive layer 11 is formed in the partition wall 6. The resistive layer 11 serves as the thin films 7 'and 8' of the positive electrode 7 and the negative electrode 8 formed on the second glass substrate 9 serving as the bus electrode, and the positive electrode 7 and the negative electrode 8, respectively. Since they are disposed between the partition walls 6 made of metal, respectively, a voltage drop occurs when a current flows from the bus electrode to the anode 7 and the cathode 8. Therefore, if too much current flows through the anode 7 or the cathode 8 in any one pixel, the voltage drop increases accordingly. Therefore, the plasma formed by the voltage applied to the anode 7 or the cathode 8 is eventually formed. The channel 5 has a uniform plasma distribution for each pixel. Therefore, the conductivity of the plasma channel is made uniform for each pixel, thereby preventing the problem that the brightness of the screen is not uniform for each pixel as in the conventional plasma address panel.

Therefore, when the partition structure and the electrode structure of the present invention are used, the anode 7 and the cathode 8 can form a structure that does not block light coming from the backlight light source 10 in the plasma address liquid crystal display device. This can prevent it from becoming dark. In addition, since the partition wall 6 is manufactured by the electroplating method using a conductive material such as metal, the screen of the plasma address liquid crystal display panel can be made large. In addition, since the plasma channel can be made uniform for each pixel by the resistor 11 formed in the partition wall 6, the brightness of the screen can be made uniform for each pixel.

Although the present invention has been described above through specific examples, the scope of the present invention is not limited thereto, and various modifications are possible within the scope of the present invention. Therefore, the scope of the present invention is not limited by the above detailed description, but only by the matter described in the claims.

Claims (4)

First and second glass substrates 4 and 9 spaced apart from each other by a predetermined distance; A space disposed between the first and second glass substrates 4 and 9 to separate the space formed by the first and second glass substrates into a plurality of plasma channels, and formed of a conductive material to form an anode in the plasma channel. A plurality of partitions 6 serving as 7 and a cathode 8; And A plurality of transparent column electrodes 12 disposed on the second glass substrate 9 of the plurality of plasma channels in parallel with the partition wall 6 to serve as electrodes of the plasma channels and to allow light to pass therethrough; Including; And the gas is filled in the plasma channel to generate a gas discharge therein in response to a voltage applied to the anode (7) and the cathode (8). 2. The plasma address panel according to claim 1, wherein the partition (6) includes a resistor (11) for causing a voltage drop by a current flowing therein. The plasma address panel for a plasma address liquid crystal display device according to claim 1 or 2, wherein the conductive material forming the partition wall is a metal material. 4. The plasma address panel for plasma address liquid crystal display according to claim 3, wherein the partition (6) is formed by electro-forming.