TW518535B - Plasma display capable of generating initial plasma from middle portion of discharging unit - Google Patents

Abstract

A plasma display includes the followings: the mutually parallel front substrate and rear substrate; plural pairs of the first electrodes and the second electrodes, which are installed on the front substrate in parallel to the first direction; and plural blocking walls, which are installed on the rear substrate in parallel to the second direction. The first direction is perpendicular to the second direction. Every two adjacent blocking walls, the first electrode and the second electrode are used to define a discharge unit. The first electrode is provided with a cutout near the center position of the discharging unit so as to make the first electrode form two apexes near the center position of the discharging unit. When an external voltage drop is applied to the first electrode and the second electrode, the first electrode charges are gathered on two apexes so as to make the initial plasma of discharging unit capable of being generated from the center position of the discharging unit.

Description

518535

The invention provides a plasma display, a plasma display which generates an initial plasma at the center. It can be set by the discharge unit. In terms of fluorescein and deep luminescence pedestal, the radioactive rays of the gaseous plasma produce a polycondensation and a polycondensation to display the light body, which affects the electrical steps. Then, the plasma display can improve the phosphor and add ultraviolet to increase electricity. It can also: The principle of making large-size and large-area light is to generate ultraviolet wells by using plasma. The precursor emits visible light. Luminous efficiency of the plasma state. The luminous efficiency of the aforementioned plasma display is improved, but it is not easy to use the luminous efficiency of the prior art materials themselves. Another method of generating 2 can also improve the efficiency of the plasma display. 7 In addition to changing the electrode structure of the plasma display, the electrode structure can be improved to enhance the electric plasma display. Figure 1 is a conventional plasma. A schematic view of the display 10. FIG. 2 is a top view of the discharge unit 34 of the plasma display 10 shown in FIG. 1. As shown in FIG. 1, the conventional plasma display panel (PDP) 10 includes a casing (not shown), a front plate 12 and a rear plate 14 are mounted vertically Inside the case. The front substrate 12 and the back substrate 14 are parallel to each other, and the front substrate 12 may be a transparent substrate. The front substrate 12 is provided with a plurality of pairs of first electrodes 16 and second electrodes 17 ', which are arranged on the front substrate 1 2 in a direction 18 in parallel. A protective layer

518535

V. Description of the invention (2) 20, usually composed of magnesium oxide (MgO), is arranged on the front substrate 12 and covers the electrodes 16, 17 to protect the electrodes from generating discharge electrons at the same time. A plurality of ribs 22 are provided on the back substrate 14 along a direction 24 perpendicular to the direction 18, and a plurality of data electrodes 26 are provided on the back substrate 14 in parallel along the direction 24. Between the walls 22, and phosphors of three different colors, including red, green, and blue phosphors 28, 30, and 32, are sequentially filled between two adjacent barrier walls 22. A discharge cell is formed between each of the two adjacent barriers 22 and each electrode pair 16. Each electrode of the first electrode 16 and the second electrode 17 includes an auxiliary electrode 36 and a sustaining electrode. Electrode 38. Each sustaining electrode 38 is electrically connected to a central portion of the discharge cell 34. The auxiliary electrode is a -metal electrode, usually formed of chromium-copper-chromium to assist = can reduce the resistance of the sustaining electrode 38. The sustain electrode 38 may be made of indium tin oxide (ITO), which can reduce the starting voltage of lice 34 when generating plasma. -Early when the first electrode 16 and the second electrode in the discharge unit 34 When a voltage of 17 gates is applied, two electrodes in a discharge cell 34 will be corresponding ^: an electric field to trigger the generation of plasma in the discharge cell 34. For example, as the first electrode 16 and the second electrode 17 are parallel to each other The shape can't be generated at any position in the parallel electrode, so the position where the initial plasma is generated in. 襞 is random. For example,

Page 5 518535

Electrification may occur between points 1 and 2 with the shortest distance, or between points 3 and 4 with the longest distance. If the initial plasma generation position is relatively close to the barrier wall, it may even cross the barrier wall 22 to generate an initial plasma between points 5 and 6. Once the initial plasma is generated between points 5 and 6, the two discharge cells will light up at the same time, causing the phenomenon of the interference (cr0ss_talk) of the discharge cells, and then the noise on the daytime display of the plasma display. a, the size of the current plasma display is constantly increasing, so that each electrode needs to drive more discharge cells 34 to generate plasma to emit light. Therefore, in a state where the starting voltage of each discharge cell 34 is unchanged: the energy transmitted by each electrode will be consumed quickly as the discharge cell increases, so that some of the discharge cells 34 lack sufficient energy Plasma is generated, and black spots appear on the screen of the plasma display 10. However, simply increasing the energy transmitted on each pole will cause the plasma display 10 to overheat. Therefore, the starting voltage of the plasma display 10 must be further reduced to avoid black spots on the screen of the electronic display 10. -The main purpose of this local Mingming is to provide a plasma display that can generate an initial plasma from the discharge unit, to prevent the starting voltage of the discharge unit from interfering with each other. d 不 器 Simple illustration of the picture Figure: It is a schematic diagram of a conventional plasma display. FIG. 1 is a top view of a discharge unit of the plasma display shown in FIG.

518535

FIG. 3 is a schematic diagram of a plasma display of the present invention. Figure 4 is the top view of Figure 2 + Band 1 Figure 5 Pan Figure + 2 discharge cells. Figures 10 through 10 are top views of examples of discharge cells in the plasma display of the present invention. <Description of other actual symbols of Dundeng Early Morning 50. Electron display 52 Front substrate 54 Back substrate 56 First electrode 57 First electrode 58 Direction 60 Protective layer 62 Barrier wall 64 Direction 66 Data electrode 68 Red fluorescent Body 70 Green phosphor 72 Blue phosphor 74 Discharge unit 76 Auxiliary electrode 78 Sustain electrode 80, 80a, 80b, 80c, 80d Notch 81 '82 &gt; 83-84 For the apex, please refer to Figure 3 and Figure 4, Figure 3 FIG. 4 is a top view of a discharge unit of the plasma display 50 shown in FIG. 3. As shown in FIG. 3, the present invention is a plasma display 50 that can generate an initial plasma from a middle portion of a discharge cell. The plasma display 50 includes a front substrate 52 (front plate), a rear substrate 54 (rear plate), and the rear substrate 54. It is parallel to the front substrate 52.

518535

The front substrate 52 is provided with a plurality of pairs of first electrodes 56 and second electrodes 57 on the front substrate 52 in a direction 5 8 in parallel, and a protective layer 60, which is usually composed of magnesium oxide and is provided on the front substrate. 52 上 and covering electrodes 56, 57. The back substrate 54 is provided with a plurality of barrier ribs 62 on the back substrate 54 in a direction 64 perpendicular to the direction 58, and a plurality of data electrodes 66 are disposed on the barrier wall in a direction 64 in parallel. On the back substrate 14 between 62 and three red, green and blue phosphors 68, 72 are sequentially coated between two adjacent barrier ribs 62. A discharge cell (displ cell) 74 is formed between every two adjacent barrier ribs 62 between the first electrode 56 and the second electrode 57. The basic structure of the present invention is that the first electrode 56 is provided with a gap near the center of the discharge unit 74, so that the first electrode 56 forms two vertices 81, 83 near the center of the discharge unit 74. When a voltage drop is applied between the first electrode 56 and the second electrode 57, the charge of the first electrode 56 can be concentrated on the two vertexes 81 and 83, and then the corresponding discharge occurs between the first electrode 56 and the second electrode 57. The center of the unit 74 = a large electric field, so that the initial plasma of the discharge unit 74 can be generated by the center of the early discharge element 74 first. For a first specific embodiment, please refer to each of the second electrodes 57 includes a pole 76. Each of the first electrode 56 and the second electric unit 74 is provided with a square shape at the center and extends from the sustain electrode 78 to the third and fourth figures. The first electrode 56 and the sustain electrode including a sustain electrode 78 and an auxiliary electrode 57 are provided. The electrode 78 is close to the gap 80 corresponding to the discharge, and the gap 80 is approximately the auxiliary electrode 76; that is, the gap 80

Page 8 518535 V. Description of the invention (6) Pass the first electrode 56 and the electrode 78 at each discharge single electrode 56 and the second 84. Due to the strong intensity of the tip, it is easy to generate the initial electric point 82, or between the points 81 and 84. The plasma display plasma of the present invention avoids cutting the electrode 5 in the second electrode 57 and the element 74. 7 On the principle of electricity, the top electric field makes the top gather. For example, the sustain electrode 78 which is initially generated at the point 83 and the point 83 and the point 82 can dry between the discharge cells 74, so that it can form 24 independent blocks. The notches form four vertices 81, 8 2 points 81, 82, 83, and 84. The initial plasma of points 81, 82, 83, and 84 may be generated between points 84, and even initial plasma may be generated between them. Interference occurs in the middle of the unit 74. The sustaining power 80 is near the 8th, 83th, and 8th, and may be close to the point 8 1 and may be. Therefore, please refer to FIG. 5 to FIG. 10, which are top views of other embodiments of the discharge unit 74. Fig. 5 J = To be different, the improvement lies in the gap section of the first electrode 56 or the second electrode 57. Fig. 5 * ′ The present invention can only have two defects, a. As shown in FIG. 6, the gap 80 b does not extend from the sustain electrode 78 of the pole 57 to the auxiliary electrode ”, that is, the gap ^ does not penetrate the second sustain electrode 78. In the present invention,, = is formed as Figure 7: == = The edge of the edge of the pole 78 is not necessarily a square edge ^: 9 and Figure 10, in order to improve the plasma display ^ 8 2 !; 5] or the second electrode 57 contains a hollow design The area of the sustain electrode 78 that maintains low electrical transmittance and low transmittance. Page 9 518535 V. Description of the invention (7) The plasma display 50 of the present invention is characterized by the first electrode 56 in each discharge cell 74 A notch 80 is provided to form a vertex or sharp corner 81, 83 on the first electrode 56. Due to the effect of tip discharge, even if the voltage between the first electrode 56 and the second electrode 57 does not increase, it can be generated near the sharp corner. Large electric field. The electric field near the sharp corners will cause the gas in the central part of the discharge unit 74 to dissipate, thereby generating an initial plasma and emitting ultraviolet light, so that the phosphor of the discharge unit 74 emits visible light. Therefore, the plasma display 50 can Ensure that a starting current is generated in the center of the discharge unit 74 At the same time, a large amount of plasma is also maintained in the central part of the discharge unit 74, so that the interference of the discharge unit can be avoided. In addition, since the data electrode 66 is provided in the center of the barrier wall 62 of the back substrate, it is also provided here. In the center of the corresponding discharge cell. The electrical signal on the data electrode 66 is used to control whether the plasma is generated, that is, to control the brightness of the discharge cell. When a large amount of plasma is maintained in the center of the discharge cell, because the plasma The distance from the data electrode is shortened, so the control mechanism for turning on or off each discharge cell becomes more accurate. The plasma display 50 of the present invention uses the vertices 81 and 83 on the first electrode 56 to increase the electric field between the electrodes 56, 57. The plasma display 50 does not need to use a high starting voltage to generate a starting plasma to make the discharge cells 74 emit light. Even if the number of discharge cells 74 increases, each electrode 56 can still have enough energy to light up each Discharge cells 74. If the number of discharge cells 74

Page 10 518535

It can be further lowered to prevent the plasma display 50 from overheating without increasing the starting voltage of the plasma display 50. Compared with the conventional plasma display 10, the plasma display 50 of the present invention is provided with a notch 80 on the first electrode 56, so that the first electrode 57 forms vertices 81, 83 near the center of the corresponding discharge unit. By utilizing the tip discharge effect, the present invention can ensure that the starting plasma is generated in the middle of the discharge cell 74, and that the starting plasma is generated at the edge of the discharge cell to light up another discharge cell. In addition, since a higher electric field can be generated in the vicinity of the apex on the electrode, the plasma display of the present invention can reduce the starting voltage and avoid black spots on the screen of the plasma display. The above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the scope of the patent application of the present invention shall fall within the scope of the patent of the present invention.

Claims (1)

518535 6. Scope of patent application 1. A plasma display panei PDP, which includes: 'a front plate; a rear plate parallel to the front substrate; = number of pairs A first electrode and a second electrode, the first electrode and the second electrode system / σ being arranged in parallel on the front substrate in a first direction; and a plurality of ribs being arranged in parallel in a second direction On the back substrate, the first direction is perpendicular to the second direction; 八, a display cell is defined by two adjacent barrier ribs of the mother and a first electrode, a second electrode (display cen); γ, The first electrode is provided with a gap near the center of the discharge cell, so that the two first electrodes form two vertices near the center of the discharge cell; when a voltage drop is applied between the first electrode and the second electrode, The charge of the _ electrode is concentrated on the two vertices, so that the initial plasma of the discharge cell can be generated at the center of the discharge cell first. 2 · As for the display of the first scope of the patent application, wherein the gap is an approximately square gap. The plasma display of the first item of the patent scope is the total electrode, wherein the first electrode, a sustain electrode, and an auxiliary electrode. 4 Yuruo Shenshen's Electro-Polymer Display No. 3 in the scope of the post-secondary benefit '"The gap is 518535 6. Application for a patent scope 5. If you apply for a plasma display in Item 4 of the patent scope, where the gap runs through the section The sustaining electrode of one electrode, so that the sustaining electrode of the first electrode is cut into two independent blocks in the discharge cell, and the auxiliary electrode relying on the first electrode is turned on. In a display, the first electrode has a hollow area to increase the light transmittance of the discharge cell. Page 13