CN1302505C - Addressing Electrode Structure of Plasma Flat Panel Display - Google Patents

Abstract

The invention discloses an addressing electrode structure of plasma flat panel display, the plasma flat panel display at least comprises an upper substrate, a lower substrate and a plurality of luminous units, each luminous unit is controlled by an X electrode and a Y electrode which are positioned on the upper substrate and an addressing electrode which is positioned on the lower substrate, the addressing electrode structure at least comprises: two parallel wires located on the lower substrate; and a plurality of separated conductor blocks located between the two parallel wires for coupling the two parallel wires, wherein each conductor block is located on the lower substrate at the adjacent position of the X electrode and the Y electrode in the corresponding light-emitting unit. With the above configuration, the current resistance of the electrode can be improved and the problem of an excessive load on the write side can be avoided.

Description

Addressing Electrode Structure of Plasma Flat Panel Display

technical field

The present invention relates to a plasma flat panel display (PDP), and more particularly to an address electrode structure which can improve the writing speed of light-emitting units.

Background technique

Due to the rapid development of multimedia, users have higher and higher requirements for peripheral sound and light equipment. The commonly used cathode ray tube or video tube (Cathode Ray Tube, CRT) type display is too bulky, and it is no longer sufficient in today's era of light, thin, short, and small. Therefore, many flat panel display technologies have been developed successively in recent years, such as liquid crystal display (Liquid Crystal Display, LCD), plasma flat panel display (Plasma Display Panel, PDP), and field emission display (Field Emission Display, FED), which have gradually become The mainstream of future displays. Among them, a plasma flat panel display (PDP) has attracted great attention as a full-color display device, which has a large display area, and is especially applied to a large-size TV or an outdoor display signboard. This is because the PDP has high-quality display capabilities, derived from its light self-emission form with a wide viewing angle, and high-speed response. And because the production procedure is relatively simple, it is suitable for large-size displays.

In a color PDP, ultraviolet rays are generated by gas discharge, and phosphors are excited to emit visible light to form a display effect. According to the discharge mode of the PDP, the color PDP can be simply classified into two types: an alternating current type (AC) and a direct current type (DC). In an AC type PDP, electrodes are covered with a protective layer, which makes the AC type PDP have a longer service life and higher display brightness. Therefore, in terms of display effect, luminous efficiency and service life, AC PDPs are generally better than DC PDPs.

Generally, a three-electrode structure is used in an AC PDP, including a common electrode, a scan electrode (X electrode, a Y electrode), and an address electrode. The three-electrode structure is in the form of surface discharge, and switching or sustaining discharge is performed by applying a voltage to the address electrodes. In particular, the common electrode and the scan electrode formed on the image display side substrate are made of transparent electrodes to transmit visible light. On top of each transparent electrode is a small non-transparent electrode, usually called an auxiliary electrode. The material of the transparent electrode is a semiconductor, typically formed of indium tin oxide (ITO) (a mixture of indium oxide and tin oxide). Compared with metals, the conductivity of the transparent electrode is relatively low, so it is necessary to add a narrow electrode to the transparent electrode. A small and well-conductive auxiliary electrode is used to enhance its conductivity.

When the address discharge voltage is applied to the scan electrode and the corresponding address electrode, an address discharge will be generated between the scan electrode and the address electrode, and an electric field will be formed in the corresponding light-emitting unit, so that electrons in the discharge gas are accelerated and collide with ions. At this time, the ionized electrons hit the neutral particles, and the neutral particles are ionized into high-speed electrons and ions, so the discharge gas becomes a plasma state, generating vacuum ultraviolet rays.

However, in the traditional structure, the shape of the addressing electrodes is designed to be equal in width, and in order to avoid excessive loading on the writing side due to excessive addressing capacitance, the electrode width must be reduced as much as possible, and the width of the electrodes must not be too wide, which will cause the writing speed to be too slow , and it is designed for a single wire, the current it can withstand is small, and the probability of disconnection is high.

Contents of the invention

The main purpose of the present invention is to provide an addressing electrode, which can improve the current resistance capability of the electrode.

Another object of the present invention is to provide an address electrode that can avoid the problem of excessive load on the writing side.

Another object of the present invention is to provide an address electrode that can avoid disconnection when a defect occurs in a local area.

In order to achieve the above object, the present invention provides an address electrode structure of a plasma flat panel display. The plasma flat panel display at least includes an upper substrate, a lower substrate and a plurality of light-emitting units, and each light-emitting unit is formed by an X on the upper substrate. The electrode is controlled by a Y electrode and the address electrode located on the lower substrate, and the address electrode structure at least includes:

two parallel conductors on the lower substrate; and

A plurality of conductor blocks separated from each other are located between the lower substrate and the two parallel wires for coupling the two parallel wires.

In the above address electrode structure of the plasma flat panel display, each of the conductor blocks is located on the lower substrate where the X electrode and the Y electrode in the corresponding light emitting unit are adjacent.

The beneficial effect of the present invention is that, because the addressing electrode structure of the present invention adopts the design of two wires, it can improve the current resistance of the electrode; Block, in addition to increasing the writing speed, since the addressing electrodes only have a larger area near the adjoining part of the X electrode and the Y electrode, most of the area still maintains a small area, so it can avoid writing The problem of excessive side loads.

Description of drawings

Fig. 1 is a schematic top view of an address electrode structure of a plasma flat panel display according to a preferred embodiment of the present invention;

2 is a schematic top view of an address electrode structure of a plasma flat panel display according to a preferred embodiment of the present invention, wherein a defect occurs in the address electrode.

FIG. 3 is a schematic top view of an address electrode structure of a plasma flat panel display according to a preferred embodiment of the present invention.

FIG. 4 is a three-dimensional perspective schematic view of a plasma flat-panel display having address electrodes with two wire structures according to the present invention.

FIG. 5 is a schematic cross-sectional structure diagram of FIG. 4 .

Wherein, the reference signs are explained as follows:

11 front substrate 12 back substrate

111 Transparent electrode 112 Auxiliary electrode

113 Dielectric body 114 Protective layer

123 phosphors 124 dielectrics

58 discharge units 30 addressing electrode structure

32 addressing electrodes 34 and 36 wires

38 connection areas (conductor blocks) 50 X electrodes

52 Y electrode 54 Barrier wall

Detailed ways

Without limiting the spirit and scope of application of the present invention, the implementation of the present invention is described below with an embodiment; those of ordinary skill in the art, after understanding the spirit of the present invention, can apply the addressing electrode of the present invention structure in various plasma displays. Each addressing electrode structure is composed of two wires, which are connected at the adjoining positions of the X electrode and the Y electrode close to the light-emitting unit, thereby increasing the writing speed. The application of the present invention should not be limited to the preferred embodiments described below.

As shown in FIG. 1 , it is a schematic top view of an address electrode structure of a plasma flat panel display according to a preferred embodiment of the present invention. The addressing electrode structure 30 of the present invention adopts the design of two wires, that is, each addressing electrode 32 all includes two wires 34 and 36, and these two wires 34 and 36 are only close to the X electrode of the light emitting unit. Only the adjacent parts of the Y electrodes are in contact with each other to form a connection region (conductor block) 38. Since the connection region (conductor block) 38 has a larger area, its capacitance can be increased to increase the writing speed. Except for the connecting region 38, the rest of the light-emitting unit still maintains a small area, which can avoid the problem of excessive load on the writing side.

On the other hand, since the address electrodes 32 of the present invention include two wires, they can withstand a larger current than a single wire. And as shown in FIG. 2, if a local defect 40 occurs during the wire manufacturing process, since the present invention has two wires, the current direction can be as shown by the arrow 42, bypassing the defect 40 without affecting the electrical properties of the final product. Performance. On the contrary, the traditional design only has a single wire, once a defect occurs in a single wire, it will destroy the overall electrical properties.

FIG. 3 is a schematic top view of an address electrode structure and a transparent electrode structure of a plasma flat panel display according to a preferred embodiment of the present invention. A pair of transparent electrodes 50 and 52 are respectively provided on opposite sides of the light emitting unit 58 , and auxiliary electrodes (not shown) are formed on the transparent electrodes 50 and 52 to reduce the line impedance of the transparent electrodes 50 and 52 . For the three-electrode structure, the three electrodes of the discharge unit 58 include two adjacent parallel transparent electrodes 50 and 52 (X electrodes and Y electrodes) on the front substrate, and address electrodes 32 on corresponding positions on the back substrate.

When a voltage is to be applied to the above-mentioned electrodes, since there is an address electrode region 38 with a larger area adjacent to the X electrode and the Y electrode of the light-emitting unit 58, its capacitance can be increased to improve the writing speed, and in the light-emitting unit 58 The remaining parts still maintain a small area, so the problem of excessive load on the write side can be avoided. On the other hand, the light-emitting units 58 are separated by the barrier walls 54 , such as a plurality of parallel strips, so as to form light-emitting units between the barrier walls 54 . In this embodiment, the transparent electrodes 50 and 52 (X electrodes and Y electrodes) used are elongated, but transparent electrodes of any shape can be combined with the address electrodes 32 of the present invention to form a light emitting unit .

FIG. 4 is a three-dimensional perspective schematic view of a plasma flat-panel display having address electrodes with two wire structures according to the present invention. Please refer to FIG. 4 and FIG. 3 at the same time, the plasma flat panel display at least includes a front substrate 11 and a back substrate 12 . A plurality of parallel transparent electrodes 111 (X electrodes 50 and Y electrodes 52 ), auxiliary (bus) electrodes 112 , a dielectric layer 113 and a protective layer 114 are sequentially arranged on the inner side of the front substrate 11 . A plurality of parallel address electrodes 32 are arranged on the corresponding back substrate 12, wherein the address electrodes 32 include two wires 34 and 36, and the two wires 34 and 36 are only close to the X of the light emitting unit. The adjacent parts of the electrodes and the Y electrodes are connected to each other to form a connection area (conductor block) 38 , a plurality of barrier walls 54 arranged in parallel, and phosphors 123 and dielectrics 124 . The above-mentioned transparent electrodes 111 on the front substrate 11 and the address electrodes 32 on the back substrate 12 are perpendicular to each other, and their intersections form a discharge cell, and the connection area 38 of the address electrodes 32 is located at the adjacent position of the X electrode and the Y electrode. When a voltage is applied to a specific discharge cell, the inductive layers 113 and 124 at the corresponding positions discharge in the corresponding discharge cell, and induce the phosphor 123 to emit colored light.

FIG. 5 is a schematic cross-sectional structure diagram of FIG. 4 . Please refer to FIG. 5 and FIG. 4 at the same time. Three electrodes are often used in each discharge cell 58, including two adjacent parallel transparent electrodes 111 (X electrodes 50 and Y electrodes 52) on the front substrate 11, and the corresponding positions on the back substrate 12. With the address electrode 32 formed by the two wire structures 34 and 36 and the connection area 38, a three-electrode structure is formed. When a voltage is applied to the above-mentioned electrodes, the inductive layers 113 and 124 are discharged in the corresponding discharge unit 58, so that the enclosed mixed gas generates ultraviolet light (UV) due to the discharge, and then the UV light excites the discharge unit 58. The coated phosphor 123 enables the red (R), green (G) and blue (B) phosphors to generate visible light and display images. Of course, the present invention is not limited to the strip-shaped barrier ribs 54 shown above, and various barrier rib structures can also be used.

The address electrodes of the present invention can be applied to various transparent electrodes without departing from the spirit of the present invention. Since the addressing electrode of the present invention has a design of two wires, the current resistance capability of the electrode can be improved, and when a defect occurs in a local area, the generation of disconnection can also be avoided. On the other hand, the addressing electrode structure of the present invention only connects the two wires near the adjacent positions of the X electrode and the Y electrode of the light-emitting unit to form a larger area. In addition to increasing the writing speed, other areas of the light-emitting unit The small area is still maintained, so the problem of excessive load on the write side can be avoided.

Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Those skilled in the art can make equivalent structural changes without departing from the spirit and scope of the present invention. Included in the patent scope of the present invention.

Claims (1)

1. the addressing electrode structures of a flat plasma display, this plasma flat-panel screens comprises upper substrate, infrabasal plate and a plurality of luminescence unit at least, described each luminescence unit is by an X electrode that is positioned at upper substrate and a Y electrode and the addressing electrode control that is positioned at infrabasal plate, it is characterized in that this addressing electrode structures comprises at least:

Article two, parallel wire is positioned at this infrabasal plate; And

A plurality of conductor blocks separated from one another, between these two parallel wires, in order to these two parallel wires that are coupled, wherein each described conductor block is arranged on the infrabasal plate of the X electrode of corresponding luminescence unit and Y electrode adjoiner.

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