KR100667130B1 - Plasma Display Panel - Google Patents

Abstract

The present invention relates to a plasma display panel which improves the structure of a transparent electrode in a discharge cell so that a positive light column region can be used during discharge, and has an effect of increasing driving efficiency.

In order to achieve the above object, the present invention provides a front substrate having a scan electrode and a sustain electrode formed thereon, a rear substrate having an address electrode arranged to intersect the scan electrode and the sustain electrode formed therein, and a positive beam during plasma discharge on the back substrate. A plasma display panel including partition walls for partitioning a discharge cell to use a region, wherein the scan electrode and the sustain electrode each comprise a transparent electrode and a bus electrode. A discharge ignition unit located in the center of the discharge cell to ignite a discharge between the scan electrode and the sustain electrode; and a discharge discharged by the discharge ignition unit located at both points of the discharge cell and discharged between the scan electrode and the sustain electrode. To cause the kitchen, and the discharged ignition discharged from the ignition in the kitchen And comprising a discharge diffusion, the discharge diffusion portion for diffusing unit is characterized in that the additional resistor having a predetermined resistance value is formed.

Plasma display panel, positive light, transparent electrode, discharge space, boglow

Description

Plasma Display Panel

1 is a diagram showing the structure of a typical plasma display panel.

2A and 2B are diagrams illustrating electrode structures in discharge cells of a conventional plasma display panel.

3 is a view for explaining a discharge region between electrodes.

4 shows a first embodiment of a plasma display panel according to the present invention;

5 shows a second embodiment of a plasma display panel according to the present invention;

6 shows a third embodiment of a plasma display panel according to the present invention;

7 shows a fourth embodiment of the plasma display panel according to the present invention;

<Explanation of symbols for the main parts of the drawings>

a: transparent electrode b: bus electrode

40, 41: kitchen 42, 43: discharge diffusion unit

44, 45: discharge ignition unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel for discharging using a positive column region during discharge by improving the structure of a transparent electrode in a discharge cell.

In general, a plasma display panel is a partition wall formed between a front substrate and a rear substrate to form a unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and An inert gas containing the same main discharge gas and a small amount of xenon is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 illustrates a structure of a general plasma display panel. As shown, the plasma display panel is coupled in parallel with the front substrate 100, which is the display surface on which the image is displayed, and the rear substrate 110 forming the rear surface with a predetermined distance therebetween.

The front substrate 100 is a scan electrode 101 (Y electrode) and a sustain electrode 102 (Z electrode), that is, a transparent electrode formed of a transparent ITO material for mutual discharge in one discharge cell and maintaining light emission of the cell. And the Y electrode 101 and the Z electrode 102 provided as a bus electrode b made of a metal material are formed in pairs. The Y electrode 101 and the Z electrode 102 are covered by one or more dielectric layers 103 which limit the discharge current and insulate the electrode pairs, and the magnesium oxide top surface of the dielectric layer 103 to facilitate the discharge conditions. A protective layer 104 on which (MgO) is deposited is formed.

The rear substrate 110 is arranged such that a plurality of discharge spaces, that is, barrier ribs 111 of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 112 (X electrodes) that perform address discharge to generate vacuum ultraviolet rays are disposed in parallel with the partition wall 111. On the upper side of the rear substrate 110, R, G, and B phosphors 113 which emit visible light for image display during address discharge are coated. A white dielectric 114 is formed between the address electrode 112 and the phosphor 113 to protect the address electrode 112 and reflect visible light emitted from the phosphor 113 to the front substrate 100.

In the plasma display panel having such a structure, a plurality of discharge cells are formed in a matrix structure. Looking at the electrode structure in the discharge cell as shown in Figure 2a to 2b.

2A and 2B are diagrams illustrating an electrode structure in a discharge cell of a conventional plasma display panel.

First, in the electrode structure in the discharge cell of the conventional plasma display panel shown in FIG. 2A, a rectangular transparent electrode a is formed on a front substrate (not shown), and the rectangular transparent electrode a is formed in the discharge cell. Each of the bus electrodes b is formed at both points to face each other with the center of the discharge cell interposed therebetween. In addition, the address electrode 112 corresponding thereto may cross the bus electrode b and the transparent electrode a while being spaced apart by a predetermined distance with the bus electrode b and the transparent electrode a interposed therebetween. Is done.

The electrode structure in the discharge cell of the conventional plasma display panel shown in Figure 2b, 'T' shaped transparent electrode (a) is formed on the front substrate (not shown), the 'T' shaped transparent electrode (a) is Each of the bus electrodes b in the discharge cells is formed at both points to be formed so as to face each other with the center of the discharge cell interposed therebetween. In addition, the address electrode 112 corresponding thereto is formed to cross the bus electrode b and the transparent electrode a while being spaced apart by a predetermined distance with the bus electrode b and the transparent electrode a interposed therebetween. .

In the conventional plasma display panel having such an electrode structure, only a negative glow area of the discharge area is used during driving because the gap between the transparent electrodes a is too small in the discharge cell. The discharge area described above will be described with reference to FIG. 3.

3 is a view for explaining a discharge region between electrodes.

In FIG. 3, when voltage is applied to the cathode and the anode, the secondary electrons generated and emitted by the cathode collision of the ions are accelerated by the electric field and collide with the neutral particles to generate new electrons. Will be generated. Secondary electrons are accelerated more strongly in the negative glow region where the magnitude of the electric field is larger as the voltage changes. The electrons generated as a collision continue to obtain energy in the state of ionization, and reach the positive column region. In the positive region, energy is no longer obtained, and energy is transmitted to the neutral particles through the collision. In this process, the excited particles fall to the ground and generate visible and vacuum ultraviolet rays.

Of these discharge regions, the positive light main region emits light by exciting gas only with electrons having high energy in the whole, not energy due to an electric field. In addition, in the positive light main region, ionization hardly occurs and a lot of light emission due to excitation is generated, so that energy is converted into light as a whole.

Accordingly, when the distance between the transparent electrodes is reduced in the discharge cells of the plasma display panel, the size of the sub-glow region is not largely changed while the size of the positive light main region is relatively reduced. Therefore, as described above, the conventional plasma display panel having the electrode structure as shown in FIGS. 2A to 2B has a problem in that it is hard to use the positive light main region.

In order to solve this problem, an object of the present invention is to provide a plasma display panel which improves the light emitting efficiency by improving the electrode structure in the discharge cell and discharging using the positive light main region during discharge.

In order to achieve the above object, the present invention provides a front substrate having a scan electrode and a sustain electrode formed thereon, a rear substrate formed with an address electrode arranged to intersect the scan electrode and the sustain electrode, and a positive light column during plasma discharge on the rear substrate. A plasma display panel including partition walls for partitioning a discharge cell so as to use a positive column region, wherein the scan electrode and the sustain electrode are formed of a transparent electrode and a bus electrode, respectively, within the discharge cell. Is a discharge ignition unit located in a center direction of the discharge cell to ignite a discharge between the scan electrode and the sustain electrode; A kitchen part for generating a positive liquor discharge as the electric discharge between And a discharge diffusion unit configured to diffuse the discharge ignited by the ignition unit to the kitchen unit.

The spacing between the kitchen parts of each transparent electrode in the discharge cell is characterized in that more than 200um 300um.

The interval between the discharge ignition portions of each transparent electrode in the discharge cell is characterized in that more than 60um or less than 80um.

The discharge ignition portion of each transparent electrode in the discharge cell is characterized in that it has a predetermined area in which a sufficient amount of wall charges to cause a discharge can be accumulated.

The discharge ignition portions of the transparent electrodes in the discharge cells are characterized in that they face each other with the center of the discharge cells in a polygonal shape.

The discharge ignition portion of each transparent electrode in the discharge cell is characterized in that the width in the vertical direction is kept constant in the center of the discharge cell.

The discharge ignition portion of each transparent electrode in the discharge cell is characterized in that the width in the vertical direction gradually increases toward the discharge cell center direction toward the center of the discharge cell and is kept constant after a predetermined point.

The discharge diffusion part of each of the transparent electrodes in the discharge cell may have a predetermined length so that a vertical width of the transparent electrode in the discharge cell center direction can spread the ignition discharged from the discharge ignition part to the kitchen unit.

The width in the longitudinal direction in the discharge cell is characterized in that more than 5um 30um.

The discharge ignition portion of each transparent electrode in the discharge cell may further include a resistor having a predetermined resistance value.

The resistance value of the resistor unit is characterized in that less than 0.5kΩ or less than 3kΩ.

The resistance unit is characterized in that formed by oxygen deposition.

Hereinafter, an embodiment of a plasma display panel according to the present invention will be described in detail with reference to the accompanying drawings.

<First Embodiment>

4 is a view showing a first embodiment of the plasma display panel according to the present invention.

As shown, the first embodiment of the plasma display panel according to the present invention is a discharge in which the transparent electrodes in the discharge cells are positioned in the direction of the center of the discharge cells to ignite the discharge between the scan electrode Y and the sustain electrode Z. The kitchen, which is located at both the ignition sections 44 and 45 and the discharge cells, respectively and causes the electrical discharge between the scan electrodes Y and the sustain electrodes Z using the discharges ignited by the discharge ignition sections 44 and 45. All 40 and 41, and discharge diffusion parts 42 and 43 for diffusing the ignition discharged from the discharge ignition parts 44 and 45 described above to the kitchen parts 40 and 41. Although not shown here, the corresponding address electrode is formed to cross the bus electrode b and the transparent electrode a while being spaced apart by a predetermined distance with the bus electrode b and the transparent electrode a interposed therebetween. .

The discharging portions 40 and 41 of each of the transparent electrodes a in the discharge cells are in contact with the bus electrodes b in the discharge cells. In addition, it is preferable that the widths of the vertical parts of the kitchen parts 40 and 41 are kept constant in the direction of the center of the discharge cells in a rectangular shape. That is, the width in the vertical direction is kept constant from both ends of the discharge cell to the point (A, A`). Herein, the distance between the discharge parts 40 and 41 of each of the transparent electrodes a in the discharge cell, that is, the distance (dB) between the discharge part of the reference numeral 40 and the discharge part of the reference numeral 41 is 200 μm or more and 300 μm or less. The reason for forming the interval between each of the electrical discharge parts 40 and 41 relatively longer than the conventional structure is to secure a space in the discharge cell in order to use more positive column area during discharge. In other words, by securing a space in which the discharge can be spread, the discharge using the positive beam main region becomes easier.

The discharge ignition portions 44 and 45 of the transparent electrodes a in the discharge cells are formed in a polygonal shape so that the discharge ignition portions 44 and 45 face each other with the center of the discharge cell interposed therebetween. In addition, the discharge ignition portions 44 and 45 have a structure in which the width in the vertical direction is kept constant in the discharge cell center direction. That is, the rectangular structure in which the width in the vertical direction is kept constant in the discharge cell center direction as it proceeds from the point B toward the discharge cell center direction.

The discharge ignition sections 44 and 45 of the transparent electrodes a in the discharge cells may have different structures, but preferably the discharge ignition sections 44 and 45 of the transparent electrodes a. Has the same structure. That is, the discharge ignition portion 44 and the discharge ignition portion 45 have the same structure. In addition, in the discharge ignition portions 44 and 45 of each transparent electrode a, the width d in the horizontal direction in the discharge cell is taken into account in the amount of wall charge accumulated in the discharge ignition portions 44 and 45. Decide In other words, the discharge ignition portions 44 and 45 of each of the transparent electrodes a in the discharge cells have a sufficient area to allow a sufficient amount of wall charges to accumulate.

Further, the width in the vertical direction may be relatively long in the discharge cells of the discharge ignition portions 44 and 45 of each transparent electrode a, which is the discharge ignition portions 44 and 45 of each transparent electrode a. This is to increase the effective discharge area on the transparent electrode (a) where the wall charges (Wall Charges) that contribute to the discharge voltage during discharge by forming a relatively long width of the vertical direction. That is, in order to increase the area of the surface where the discharge ignition parts 44 and 45 of each transparent electrode a face each other.

The interval dA between the discharge ignition portions 44 and 45 of each transparent electrode a in the discharge cell, that is, the interval dA between the discharge ignition portion 44 and the discharge ignition portion 45 is greater than or equal to 60 μm. Less than 80um. The reason why the interval between the discharge ignition parts 44 and 45 of each transparent electrode a is defined is that the positive light main area is used more efficiently during discharge, and at the same time, the electrical discharge parts 40 and 41 of each transparent electrode a are described above. This is to prevent the discharge from occurring between the scan electrode (Y) and the sustain electrode (Z) because the spacing between the electrodes is too wide.

In the discharge cell, the width in the vertical direction in the center direction of the discharge cells of the discharge diffusion parts 42 and 43 of each transparent electrode a indicates that the discharges ignited by the discharge ignition parts 44 and 45 are discharged from the kitchen parts 40 and 41. Small enough to spread to The reason why the vertical widths of the discharge diffusions 42 and 43 of the transparent electrodes a are sufficiently small in the discharge cells is that the lost power is the product of the square of the current and the resistance (P = I ² R). This is because the discharge diffusion parts 42 and 43 preferably have a resistance value higher than or equal to a predetermined value in order for the discharge ignited by the discharge ignition parts 44 and 45 to diffuse into the kitchen parts 40 and 41. . That is, since the amount of current flowing through the discharge diffusion parts 42 and 43 increases as the resistance values of the discharge diffusion parts 42 and 43 decrease, the loss power also increases in proportion to the square I ² of the increased current.

Therefore, the width of the vertical direction in the discharge cell center direction of the discharge diffusion parts 42 and 43 is sufficiently small so that the discharge diffusion parts 42 and 43 have a resistance value of sufficient magnitude. For example, it is preferable that the width in the vertical direction in the center of the discharge cells of the discharge diffusion parts 42 and 43 of each of the transparent electrodes in the discharge cells is 5 µm or more and 30 µm or less.

In the first embodiment of the plasma display panel according to the present invention, when the driving voltage is applied, a weak discharge is generated between the discharge ignition portions 44 and 45 of each of the transparent electrodes a in the discharge cell. The discharge diffusion parts 42 and 43 having a resistance value of a predetermined value or more are diffused into the kitchen parts 40 and 41. Then, a discharge is generated between the discharging portions 40 and 41 of each of the transparent electrodes a in the discharge cell, whereby a discharge is generated between the scan electrode Y and the sustain electrode Z.

Through this process, the first embodiment of the plasma display panel according to the present invention can discharge more effectively by using the positive light main region.

In the above-described first embodiment, the case in which the width in the vertical direction in the discharge cells of the discharge ignition sections 44 and 45 is kept constant has been described. Alternatively, the discharge ignition sections 44 and 45 are vertically centered. The width of the direction may be formed to increase gradually toward the center of the discharge cell. This structure is as follows in the second embodiment.

Second Embodiment

5 is a view showing a second embodiment of the plasma display panel according to the present invention.

As shown, the second embodiment of the plasma display panel according to the present invention differs from the first embodiment of the present invention in the structure of the discharge ignition sections 54 and 55 of each transparent electrode a in the discharge cell. . That is, the width in the vertical direction in the discharge cell center direction of the discharge ignition sections 54 and 55 of each of the transparent electrodes a in the discharge cell increases gradually from the predetermined point B to the discharge cell center direction, and then reaches the predetermined point C. ) Is kept constant. Such a structure can further increase the ratio of the effective discharge areas of the discharge ignition sections 54 and 55 of each transparent electrode a in the discharge cell, thereby further increasing the discharge efficiency. In this case, it is important to form the discharge ignition sections 54 and 55 so that the area of the discharge ignition sections 54 and 55 has a sufficient area so that a sufficient amount of wall charges can be accumulated.

In such a structure, as in the first embodiment, it is possible to discharge more effectively by using the positive beam region.

In the first and second embodiments described above, the width in the vertical direction in the discharge cell of the discharge diffusion section is sufficiently small so that the discharge diffusion section has a resistance value of a predetermined value or more. On the other hand, in a state in which the width in the vertical direction in the discharge cell of the discharge diffusion part is not sufficiently small, a predetermined resistance may be formed on the discharge diffusion part by using a different material to diffuse the ignition discharged from the discharge ignition part to the kitchen part. This is the same as the following third embodiment.

Third Embodiment

6 is a view showing a third embodiment of the plasma display panel according to the present invention.

As shown, the third embodiment of the plasma display panel according to the present invention includes a resistor unit 60 having a predetermined value on the discharge diffusion unit of each transparent electrode a in the discharge cell of the first embodiment shown in FIG. ) To form. For example, in a discharge cell having a structure as shown in FIG. 4, a resistance portion of 0.5 kΩ or more and 3 kΩ or less on the discharge diffusion portion 60 for diffusing the ignition discharged from the discharge ignition portion 65 to the kitchen portion 61. It is preferred to form 60). In addition, the resistance unit 60 is preferably formed by depositing oxygen (O2).

Similarly, a predetermined resistance may be formed in the discharge diffusion portion of the second embodiment of FIG. 5, which is the same as the fourth embodiment.

Fourth Embodiment

7 is a view showing a fourth embodiment of the plasma display panel according to the present invention. As shown, the fourth embodiment of the plasma display panel according to the present invention has a predetermined value on the discharge diffusion portion of each transparent electrode a in the discharge cell in the second embodiment according to the present invention shown in FIG. The branch is a structure for forming the resistor unit 70.

In the present invention, the distance between the sustain electrode and the scan electrode is sufficiently large to increase the luminous efficiency by discharging using the positive light main region during discharge. In addition, a discharge ignition projecting toward the center of the discharge cell and a discharge diffusion part for diffusing the ignition discharged from the discharge ignition part to the kitchen part are formed on each transparent electrode in the discharge cell, so that a weak discharge is generated between each of the relatively adjacent ignition spark parts. By discharging the discharge generated in the discharge ignition unit to the kitchen unit and causing the discharge between the scan electrode and the sustain electrode in the kitchen unit, the driving voltage does not increase significantly even if the distance between the scan electrode and the sustain electrode is widened.

As described above, it will be understood by those skilled in the art that the above-described technical configuration may be implemented in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

 As described in detail above, the present invention has the effect of increasing the discharge efficiency by discharging using the positive light main region during discharge.

Claims (12)

A front substrate on which a scan electrode and a sustain electrode are formed, a rear substrate on which an address electrode arranged to intersect the scan electrode and the sustain electrode is formed, and a discharge to use a positive column region during plasma discharge on the back substrate A plasma display panel comprising partition walls for partitioning a cell, comprising: The scan electrode and the sustain electrode are each made of a transparent electrode and a bus electrode, The transparent electrode in the discharge cell, A discharge ignition unit positioned in the center of the discharge cell to ignite a discharge between the scan electrode and the sustain electrode; A discharge part positioned at both peripheries of the discharge cells and generating positive discharge as a discharge between the scan electrode and the sustain electrode by discharges ignited by the discharge ignition part, and A discharge diffusion unit configured to diffuse the discharge ignited by the discharge ignition unit to the kitchen unit, And wherein the discharge diffusion unit is formed with a resistor having a predetermined resistance value. The method of claim 1, And a gap between the kitchen parts in the discharge cell is 200um or more and 300um or less. The method of claim 1, And a distance between the discharge ignition portions within the discharge cell is 60um or more and 80um or less. The method according to claim 1 or 3, And the discharge ignition portion has a predetermined area where a sufficient amount of wall charges can be accumulated to cause a discharge. The method of claim 4, wherein And the discharge ignition unit faces each other in a polygonal shape with the center of the discharge cell interposed therebetween. The method of claim 5, And wherein the discharge ignition unit maintains the width in the vertical direction in the center of the discharge cell. The method of claim 6, And wherein the discharge ignition portion gradually increases in width in the center direction of the discharge cell toward the center of the discharge cell and remains constant after a predetermined point. The method of claim 1, And wherein the discharge diffusion unit has a predetermined width in a vertical direction in the center of the discharge cell so that the discharge ignited by the discharge ignition unit can be sufficiently diffused into the kitchen unit. The method of claim 8, And the width in the vertical direction is 5um or more and 30um or less. delete The method of claim 1, And a resistance value of the resistance unit is 0.5 kΩ or more and 3 kΩ or less. The method of claim 11, And the resistor unit is formed by oxygen deposition.

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