KR20010005103A - Front panel of plasma display panel - Google Patents

Abstract

PURPOSE: A front panel of a plasma display panel is provided to reduce a discharge start voltage without varying the physical property of a dielectric layer so as to improve the discharge efficiency. CONSTITUTION: An ITO(indium tin oxide) electrode comprises a discharge start area(21A) and a discharge sustain area(21B). A first and second transparent dielectric layers(23,24) covers the discharge start area(21A) and the discharge sustain area(21B). A third transparent dielectric layer pattern(25) exposes the second transparent dielectric layer(24) superposed between adjacent discharge start areas(21A). When the discharge is generated at the parallel discharge start areas(21A) by increasement of an applied voltage of a plasma display panel, the discharge start voltage is decreased because a thickness of the dielectric layer between the adjacent discharge start areas(21A) is relatively thin. Therefore, a driving voltage and a power consumption can be decreased.

Description

Front panel of plasma display panel {FRONT PANEL OF PLASMA DISPLAY PANEL}

The present invention relates to a method for manufacturing a plasma display panel, and more particularly, to a front panel of a plasma display panel capable of reducing a discharge start voltage.

Plasma display panels (hereinafter referred to as PDPs) are devices that display characters or graphics using light emitted from plasma generated during gas discharge. PDP has the advantage of being most suitable for large-scale display among various flat panel displays such as liquid crystal display (LCD), field emission display (FED), and electroluminescence display (ELD) which are being actively studied.

That is, the plasma display panel can be enlarged to 40 "or larger, and CRT level colorization is possible because the ultraviolet light generated by the discharge uses a photoluminescence mechanism that stimulates the phosphor to emit visible light. As a self-emissive display, it has many unique advantages not found in other flat panel devices, such as a wide viewing angle of more than 160 °. It is considered as a large display device for multimedia.

PDP uses two glass substrates with a thickness of about 3 mm to apply an appropriate electrode and phosphor on each substrate, and forms plasma in the space therebetween while maintaining the distance between the two substrates at about 0.1 mm to 0.2 mm. Since it is adopted, it can be enlarged as a flat plate.

In addition, in the PDP, the gas discharge has a strong non-linearity in which discharge does not occur even when a voltage is applied between electrodes, and a super large panel having a memory function that is essential for driving a large display. Even in this case, a high quality image can be expressed without deteriorating the luminance.

Plasma display panels have a direct current (DC type) in which the electrode for generating plasma is directly exposed to the plasma so that conduction current flows directly through the electrode, and the electrode is covered with a dielectric and is not directly exposed. ) Is divided into the alternating current type (AC type).

The front plate of AC type PDP consists of a pair of parallel transparent electrodes, a bus electrode formed on the transparent electrode to increase conductivity, a dielectric layer, etc., and the back plate is an address electrode, a dielectric layer, and a dielectric layer perpendicular to the bus electrode. And a fluorescent layer formed between the partition walls and the partition walls. The front plate and the back plate of such a structure are sealed and exhausted, and a PDP is manufactured.

FIG. 1A is a plan view showing a front plate and a partition of a conventional PDP, and FIG. 1B is a cross-sectional view taken along line AA ′ of FIG. 1A. In the figure, reference numeral 11A denotes a discharge start region of the transparent electrode, 11B denotes a discharge sustaining region of the transparent electrode, 12 denotes a bus electrode, 13 denotes a transparent dielectric, 14 denotes an MgO layer, and H, Is a hole and 'BR' represents a bulkhead.

The main factor affecting the discharge characteristics in the plasma display panel is the discharge electrode. In general, the discharge electrode is composed of a transparent indium tin oxide (ITO) electrode and a bus electrode.

Since the discharge start voltage, the discharge sustain voltage, the brightness, and the discharge current are affected by the structure of the ITO electrode, various structures have been proposed. That is, the research on the transparent electrode structure to obtain the effect of reducing the discharge voltage and increasing the discharge efficiency by reducing the distance between the electrodes associated with the discharge start to decrease the discharge start voltage, and the distance between the electrodes associated with the discharge maintenance is larger, have.

On the other hand, in the conventional PDP front plate structure, since the dielectric layer is formed flat over the entire panel as shown in FIG. 1B, the discharge characteristics are solely controlled by the distance between the discharge electrodes. Therefore, in such a dielectric layer structure, it is necessary to change dielectric properties between discharge regions in order to improve discharge characteristics.

The present invention devised to solve the above problems is an object of the present invention is to provide a front panel of the plasma display panel that can improve the discharge efficiency without changing the physical properties of the dielectric layer in the same discharge electrode structure.

Figure 1a is a plan view showing the front plate and the partition of the conventional PDP together,

FIG. 1B is a cross-sectional view along the line AA ′ of FIG. 1A;

2 is a cross-sectional view showing a front plate structure of a PDP according to an embodiment of the present invention;

3A to 3D are cross-sectional views of a PDP front plate forming process according to an embodiment of the present invention.

4A and 4B are explanatory views for explaining a discharge process in the PDP front panel structure according to the embodiment of the present invention;

* Description of reference numerals for the main parts of the drawings *

21A: discharge start area 21B: discharge holding area

22: bus electrodes 23, 24: transparent dielectric layer

25: transparent dielectric layer pattern

The present invention for achieving the above object, a glass substrate; A first electrode formed on the glass substrate and divided into a discharge start region and a discharge holding region; A second electrode formed on the discharge holding area of the first electrode; A first transparent dielectric layer covering the glass substrate, the first electrode, and the second electrode; And a second transparent dielectric layer pattern formed on the first transparent dielectric layer and having a groove on the discharge initiation region.

In addition, the present invention for achieving the above object is a glass substrate; A first electrode formed on the glass substrate and divided into a discharge start region and a discharge holding region; A second electrode formed on the discharge holding area of the first electrode; A first transparent dielectric layer pattern covering the glass substrate, the first electrode, and the second electrode and having a groove on the discharge start region; And a second transparent dielectric layer covering the groove and the first transparent dielectric layer pattern.

The present invention also provides a front panel of a plasma display panel further comprising a protective layer formed between the first transparent dielectric layer pattern and the second transparent dielectric layer.

The present invention is characterized in presenting a PDP front plate structure having a relatively thin dielectric layer thickness on the discharge initiation region rather than a dielectric layer thickness on the discharge sustain region. In this faceplate structure, the thickness of the dielectric layer on the discharge sustaining region is not reduced, so that the discharge path during sustained discharge is sufficiently long so that the luminous efficiency is not reduced, and the thickness of the dielectric layer on the discharge initiation region is relatively thin. When the same voltage is applied, the electric field between the discharge electrodes is stronger, the discharge start voltage is reduced.

2 is a cross-sectional view illustrating a front plate structure of a PDP according to an exemplary embodiment of the present invention, in which an ITO electrode and an ITO electrode are separated into a discharge start region 21A and a discharge holding region 21B on a glass substrate 20; The discharge starting region of the first transparent dielectric layer 23 and the second transparent dielectric layer 24 and the ITO electrode covering the entire structure of the bus electrode 22 and the bus electrode 22 formed on the discharge sustaining region 21B. A third transparent dielectric layer pattern 25 and a third dielectric layer pattern 25 covering 21A and the discharge sustaining region 21B and exposing the second transparent dielectric layer 24 overlapping the neighboring discharge initiation region 21A. ) And a protective layer 26 formed on the second dielectric layer 24.

In the PDP front panel according to the present invention, a dielectric layer overlapping between adjacent discharge start regions is relatively thin, so that the discharge start voltage can be reduced, and the driving voltage and power consumption of the panel can be reduced.

Hereinafter, a method of forming a front plate of a plasma display panel according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 3A to 3D.

First, as shown in FIG. 3A, an ITO layer for forming a transparent electrode is formed on the entire surface of the glass substrate 20 by a sputtering method, and then patterned and discharged by a photo, etching process, or the like. An ITO electrode composed of the start region 21A and the discharge sustain region 21B is formed. The structure of such an ITO electrode is the same as that of the conventional ITO electrode shown in Fig. 1A. That is, a hole H is formed in the ITO electrode and divided into a discharge start region 21A and a discharge holding region 21B.

Subsequently, the bus electrode 22 is formed on the discharge holding region 21B of the ITO electrode by using a metal etching method or a printing method.

Next, as shown in FIG. 3B, the paste is printed once using a dielectric mask, followed by dry firing to form the first dielectric layer 23.

Next, as shown in FIG. 3C, the paste is printed once using the same mask used to form the first dielectric layer 23, and dried and baked to form the second dielectric layer 24 on the first dielectric layer 23. Form.

Next, a third mask covering the discharge start region 21A and the discharge holding region 21B of the ITO electrode using a pattern mask and exposing the second dielectric layer 24 overlapping the neighboring discharge start region 21A. The dielectric layer pattern 25 is formed.

Next, as shown in FIG. 3D, an MgO passivation layer 26 is formed on the second dielectric layer 24 overlapping the third dielectric layer pattern 25 and the neighboring discharge start region. Next, a seal layer or the like is formed.

In the above-described embodiment of the present invention, the forming of the pattern with the third dielectric layer has been described as an example. However, the protective film may be formed after the pattern is formed with the second dielectric layer.

In addition, a patterning process may be performed in which a dielectric layer is formed on the entire surface of the substrate using a dielectric sheet and then a portion between the discharge initiation electrodes is removed.

Increasing the applied voltage to the PDP having such a front plate structure generates a discharge (A) in parallel discharge start regions 21A at predetermined intervals, as shown in FIG. 4A. As the dielectric layer thickness is relatively thin, the discharge start voltage is reduced, resulting in a decrease in driving voltage and a decrease in discharge power.

After the discharge is started, as shown in Fig. 4B, the discharge is held (B) between the main discharge region, that is, the discharge holding region 21B, spaced apart by a predetermined interval with the discharge start region 21A interposed therebetween.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

According to the present invention as described above, a dielectric layer overlapping with a neighboring discharge start region can be formed relatively thin to reduce the discharge start voltage. Accordingly, the driving voltage and power consumption of the panel can be reduced.

Claims (7)

In the front panel of the plasma display panel, Glass substrates; A first electrode formed on the glass substrate and divided into a discharge start region and a discharge holding region; A second electrode formed on the discharge holding area of the first electrode; A first transparent dielectric layer covering the glass substrate, the first electrode, and the second electrode; And A second transparent dielectric layer pattern formed on the first transparent dielectric layer and having a groove on a discharge initiation region; The front panel of the plasma display panel comprising a. The method of claim 1, And a passivation layer formed on the first transparent dielectric layer and the second transparent dielectric layer pattern. The method according to claim 1 or 2, The first transparent dielectric layer, A front panel of the plasma display panel, characterized in that it comprises at least one layer. The method of claim 3, wherein The first electrode is an indium tin oxide (ITO) electrode, And the second electrode is a bus electrode. In the front panel of the plasma display panel, Glass substrates; A first electrode formed on the glass substrate and divided into a discharge start region and a discharge holding region; A second electrode formed on the discharge holding area of the first electrode; A first transparent dielectric layer pattern covering the glass substrate, the first electrode, and the second electrode and having a groove on the discharge start region; And A second transparent dielectric layer covering the groove and the first transparent dielectric layer pattern The front panel of the plasma display panel comprising a. The method of claim 5, And a protective layer formed between the first transparent dielectric layer pattern and the second transparent dielectric layer. The method according to claim 5 or 6, The first electrode is an indium tin oxide (ITO) electrode, And the second electrode is a bus electrode.