KR20050102388A - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel that can reduce abnormal discharge generated from a non-display area.

According to an embodiment of the present invention, a plasma display panel includes: a plurality of main partition walls for distinguishing discharge cells of a display area for displaying an image; Located in the non-display area outside of the display area, and characterized in that it comprises an auxiliary partition of the fishbone type for distinguishing the dummy discharge cells of the non-display area.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

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 capable of reducing abnormal discharge generated from a non-display area.

Plasma Display Panel (hereinafter referred to as "PDP") is used to excite and emit phosphors by using ultraviolet rays generated when an inert mixed gas such as He + Xe, Ne + Xe, He + Xe + Ne is discharged. Will be displayed. Such PDPs are not only thin and large in size, but also have improved in image quality due to recent technology development.

Referring to FIG. 1, a discharge cell of a three-electrode alternating surface discharge type PDP includes a sustain electrode pair including a scan electrode (Y) and a sustain electrode (Z) formed on the upper substrate 1, and a lower portion perpendicular to the sustain electrode pair. An address electrode X formed on the substrate 2 is provided. Each of the scan electrode Y and the sustain electrode Z is composed of a transparent electrode and a metal bus electrode formed thereon. The upper dielectric layer 6 and the MgO protective layer 7 are stacked on the upper substrate 1 on which the scan electrode Y and the sustain electrode Z are formed. The lower dielectric layer 4 is formed on the lower substrate 2 on which the address electrode X is formed to cover the address electrode X. FIG. A partition 3 is formed vertically on the lower dielectric layer 4. Phosphors 5 are formed on the surfaces of the lower dielectric layers 4 and the partition walls 3. An inert mixed gas such as He + Xe, Ne + Xe, He + Xe + Ne is injected into the discharge space provided between the upper substrate 1, the lower substrate 2, and the partition wall 3. The upper substrate 1 and the lower substrate 2 are bonded by a real material not shown.

The PDP is time-divisionally driven by dividing one frame into several subfields having different number of emission times in order to implement grayscale of an image. Each subfield is divided into an initialization period (or a reset period) for initializing the full screen, an address period for selecting a scan line and a cell in the selected scan line, and a sustain period for implementing gradation according to the number of discharges. . The initialization period is divided into a setup period in which the rising ramp waveform is supplied and a set down period in which the falling ramp waveform is supplied. For example, when the image is to be displayed in 256 gray levels, as shown in FIG. 2, the frame period (16.67 ms) corresponding to 1/60 second is divided into eight subfields SF1 to SF8. As described above, each of the eight subfields SF1 to SF8 is divided into an initialization period, an address period, and a sustain period. The initialization period and the address period of each subfield are the same for each subfield, while the sustain period and the number of sustain pulses allocated thereto are 2 ⁿ (n = 0,1,2,3,4,5,6) in each subfield. , 7).

Meanwhile, as illustrated in FIGS. 3 and 4, the PDP has an upper non-display area 32 located at an upper outer side of an active area 31 on which an image is displayed, and a lower non-display area located at a lower outer side. Discharge spaces having the same structure as that of the discharge cells of the active region 31 are formed in the respective portions 33. That is, each of the upper non-display area 32 and the lower non-display area 33 includes the address electrode X, the upper / lower Y dummy electrodes UY1, UY2, BY1, BY2, and the upper / lower Z dummy electrodes UZ1, UZ2, BZ1 and BZ2 are formed and dielectric layers 4 and 6 are formed to cover the electrodes X, UY1, UY2, BY1, BY2, UZ1, UZ2, BZ1 and BZ2.

The dummy electrodes UDE and BDE formed in each of the upper non-display area 32 and the lower non-display area 33 generate an discharge in the non-display areas 32 and 33 during the aging process. The discharge characteristics of the discharge cells of the first horizontal line and the nth horizontal line of the active region 31 are stabilized under the same conditions as the other discharge cells of (31). To this end, a voltage capable of discharging during the aging process is applied to the upper / lower dummy electrodes UDE and BDE, and no voltage is applied after the aging process.

However, the conventional PDP has a problem that an accidental abnormal discharge occurs from the upper non-display area 32 and the lower non-display area 33. In detail, when a discharge such as an initialization discharge, an address discharge, and a sustain discharge occurs during the operation of the PDP, the space charges generated by the discharge are generated on the dielectric of the upper non-display area 32 and the lower non-display area 33. It is stored. For example, as shown in FIG. 4, when the address discharge is performed, the negative scan pulse scan is sequentially shifted to the scan electrodes Y1 to Yn, so that the positive space charge 53 moves toward the lower non-display area 33. At the same time, the negative space charge 51 moves toward the upper non-display area 32. The space charges 51 and 53 moved to the non-display areas 32 and 33 cover the electrodes of the display area 31 in the non-display areas 32 and 33 and adjacent to the non-display areas 32 and 33. Accumulate on dielectric layers 4 and 6. As such, when the wall voltage of the discharge space rising due to the wall charges accumulated on the non-display areas 32 and 33 and the display area 31 adjacent to the non-display areas 32 and 33 is greater than or equal to a voltage capable of causing discharge, the non-display area ( An abnormal discharge occurs accidentally in the 32 and 33 and the display area 31 adjacent thereto.

As a result of this abnormal discharge, visible light 48 generated from the upper and lower edges of the non-display areas 32 and 33 or the display area 31 adjacent thereto is visible to the viewer. In severe cases, an abnormal discharge may render the PDP unable to display an image for several seconds and may even damage the discharge cell.

Accordingly, an object of the present invention is to provide a plasma display panel which can reduce abnormal discharge generated from a non-display area.

In order to achieve the above object, a plasma display panel according to an embodiment of the present invention includes a plurality of main partition walls for distinguishing the discharge cells of the display area for displaying an image; Located in the non-display area outside of the display area, and characterized in that it comprises an auxiliary partition of the fishbone type for distinguishing the dummy discharge cells of the non-display area.

The main partition wall is characterized in that formed in any one of the stripe shape and fishbone shape.

The fishbone auxiliary partition wall may include a first partition wall extending from the main partition wall; A second partition wall protruding to the left of the first partition wall; And a third partition wall protruding to the right side of the first partition wall.

The third partition wall protruding from the K-th first partition wall and the second partition wall protruding from the K + 1st first partition wall are alternately formed.

The third partition wall protruding from the K-th first partition wall and the second partition wall protruding from the K + 1st first partition wall are formed to be spaced apart from each other with a predetermined distance therebetween.

The discharge cells of the display area and a pair of sustain electrodes crossing the main partition wall; And an address electrode crossing the sustain electrode pair.

The dummy discharge cells are formed of the same material as the sustain electrode pair and formed on the same plane, and include dummy electrodes intersecting the address electrodes.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 6 to 8.

FIG. 6 is a plan view illustrating a partition wall of a PDP according to the first embodiment of the present invention, and FIG. 7 is a discharge cell and a dummy discharge cell cut along the lines "1-1" and "2-2" in FIG. 6. It is sectional drawing which shows.

6 and 7, the PDP according to the first embodiment of the present invention includes a display area, a non-display area disposed outside at least one of the upper and lower ends of the display area, and a discharge located in the display area. The main partition wall 60 for partitioning the cells AP and the auxiliary partition wall 62 for partitioning the dummy discharge cell DP positioned in the non-display area are provided.

The display area includes a sustain electrode pair including the scan electrode Y and the sustain electrode Z, and an address electrode X formed to be orthogonal to the sustain electrode pair.

Each of the scan electrode Y and the sustain electrode Z is composed of a transparent electrode and a metal bus electrode formed thereon. An upper dielectric layer 106 and an MgO protective layer 107 are stacked on the upper substrate 101 on which the scan electrode Y and the sustain electrode Z are formed. The lower dielectric layer 104 is formed on the lower substrate 102 on which the address electrode X is formed to cover the address electrode X. FIG. The main partition wall 60 is formed on the lower dielectric layer 104 in a direction parallel to the address electrode X. Phosphors 105 are formed on the surfaces of the lower dielectric layer 104 and the main partition wall 60. An inert mixed gas such as He + Xe, Ne + Xe, He + Xe + Ne is injected into the discharge space provided between the upper substrate 101, the lower substrate 102, and the main partition wall 60. The upper substrate 101 and the lower substrate 102 are bonded by a real material not shown.

The main partition wall 60 is formed in a stripe or closed form or in the form of a fish-born as shown in FIG. 8 to distinguish red, green, and blue discharge spaces to cross the adjacent cells. Torque is prevented electrically and optically.

Here, the fishbone type main partition wall 60 illustrated in FIG. 8 includes a protrusion 70 derived from a stripe type partition wall. Since the protrusion 70 protrudes from the main partition wall 60 and is formed in a region that separates the discharge cells, the protrusions 70 increase the surface area of the partition walls in the discharge cells to increase the phosphor coating area. In addition, since the protrusion 70 is formed to be spaced apart from the protrusion 70 of the neighboring partition by a predetermined interval, the flow path of the air is secured, so that the gas is easily injected and exhausted.

The non-display areas are respectively disposed outside at least one of the top and bottom of the display area. On the upper substrate 101 of each of the upper non-display area and the lower non-display area, dummy electrodes UD1, UD2, BD1, and BD2 are formed on the same plane as the sustain electrode pairs Y and Z of the display area. The upper dielectric layer 106 and the passivation layer 107 are formed to cover the dummy electrodes UD1, UD2, BD1, and BD2. On the lower substrate 102 of each of the upper non-display area and the lower non-display area, an address electrode X of the display area is formed to extend, and a lower dielectric layer 104 is formed to cover the address electrode X. An auxiliary partition 62 is formed thereon, and a phosphor layer 105 is formed on the surfaces of the lower dielectric layer 104 and the auxiliary partition 62.

The secondary partition 62 is formed in the shape of a fishbone similar to the main partition 60. To this end, the auxiliary partition wall 62 includes a first partition wall 62a extending from the main partition wall 60, a second partition wall 62b protruding to the left side of the first partition wall 62a, and a first partition wall 62a. The third partition wall 62c which protrudes to the right side of is provided. The second partition 62b protruding from the first partition 62a of the k-th auxiliary partition wall and the third partition 62c protruding from the first partition 62a of the k + 1th auxiliary partition wall are alternately formed. The first partition 62a of the auxiliary partitions divides the dummy discharge cells DP adjacent to the left and right, and the second and third partitions 62b and 62c are the discharge cells AP of the display area and the dummy of the non-display area. The discharge cells DP are distinguished, and the dummy discharge cells DP vertically adjacent to each other are distinguished.

Further, the second partition 62b of the k-th auxiliary partition wall, the first partition 62a of the k + 1st auxiliary partition wall, the third partition 62c of the k + 1th auxiliary partition wall, and the first partition wall of the kth auxiliary partition wall. 62a, the second partition 62b of the kth auxiliary partition wall and the third partition 62c of the k + 1st auxiliary partition wall are spaced at a predetermined interval. As a result, an air flow path is secured, and gas injection and exhausting are facilitated.

The auxiliary partition wall 62 prevents space charges generated in the display area from moving to the non-display area during the initial discharge, the address discharge, and the sustain discharge. In addition, the auxiliary partition wall 62 prevents the visible light generated by the abnormal discharge from propagating to the display area when the abnormal discharge occurs in the non-display area.

This will be described with reference to FIG. 7. For example, as the scan pulses of the negative polarity are sequentially shifted to the scan electrodes Y1 to Yn during the address discharge, the positive spatial charge 113 is moved toward the lower non-display area as shown in FIG. 7. At the same time, the negative space charge 111 moves toward the upper non-display area. Since the space charge to be moved to the non-display area is blocked by the auxiliary partition wall 62 of the non-display area, deterioration in image quality due to abnormal discharge can be prevented.

8 is a plan view illustrating a partition wall of a PDP according to a second embodiment of the present invention.

Referring to FIG. 8, the partition wall of the PDP according to the second embodiment of the present invention includes the same components except for the auxiliary partition wall which is wider than the partition wall of the PDP shown in FIG. 6. Accordingly, detailed description of the same components will be omitted.

The secondary partition 62 is formed in the shape of a fishbone similar to the main partition 60. To this end, the auxiliary partition wall 62 includes a first partition wall 62a extending from the main partition wall 60, a second partition wall 62b protruding to the left side of the first partition wall 62a, and a first partition wall 62a. The third partition wall 62c which protrudes to the right side of is provided. The third partition 62c protruding from the first partition 62a of the k-th auxiliary partition wall and the second partition 62b protruding from the first partition 62a of the k + 1th auxiliary partition wall have a predetermined distance therebetween. It is formed to face each other to secure the flow path of air to facilitate the injection and exhaust of gas. The first partition 62a of the auxiliary partitions divides the dummy discharge cells DP adjacent to the left and right, and the second and third partitions 62b and 62c are the discharge cells AP of the display area and the dummy of the non-display area. The discharge cells DP are distinguished, and the dummy discharge cells DP vertically adjacent to each other are distinguished.

The auxiliary partition wall 62 prevents space charges generated in the display area from moving to the non-display area during the initial discharge, the address discharge, and the sustain discharge. In addition, the auxiliary partition wall 62 prevents the visible light generated by the abnormal discharge from propagating to the display area when the abnormal discharge occurs in the non-display area.

This will be described with reference to FIG. 7. For example, as the scan pulses of the negative polarity are sequentially shifted to the scan electrodes Y1 to Yn during the address discharge, the positive spatial charge 113 is moved toward the lower non-display area as shown in FIG. 7. At the same time, the negative space charge 111 moves toward the upper non-display area. Since the space charge to be moved to the non-display area is blocked by the auxiliary partition wall 62 of the non-display area, deterioration in image quality due to abnormal discharge can be prevented.

As described above, in the plasma display panel according to the present invention, in order to block the propagation of the space charges generated in the display area to the non-display area, a fishbone-type auxiliary partition wall spaced at a predetermined interval is formed in the non-display area. . Accordingly, the abnormal discharge generated in the non-display area can be prevented, and the fire compartment is improved by preventing the visible light generated by the abnormal discharge from propagating to the display area.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

1 is a perspective view showing a discharge cell structure of a conventional three-electrode AC surface discharge type plasma display panel.

2 is a diagram illustrating a frame configuration of an 8-bit default code for implementing 256 gray levels.

3 is a plan view of a plasma display panel for showing a non-display area.

4 is a cross-sectional view of a plasma display panel for showing a non-display area.

5 is a diagram schematically illustrating visible light generated from a non-display area and recognized in a display area.

6 is a plan view illustrating a partition of a plasma display panel according to the present invention.

FIG. 7 is a cross-sectional view illustrating a display area and a non-display area of the plasma display panel taken along the lines "1-1" and "2-2" in FIG. 6.

8 is a plan view illustrating a partition of a plasma display panel according to the present invention.

<Description of Symbols for Main Parts of Drawings>

1,101: upper substrate 2,102: lower substrate

3,60,62: partition 4,6,104,106: dielectric layer

5,105 phosphor 7,107: protective layer

70: projection X: address electrode

Y: scan electrode Z: sustain electrode

Claims (7)

A plurality of main partition walls for distinguishing discharge cells of a display area for displaying an image; And a fishbone-type auxiliary partition wall disposed within the non-display area outside the display area to distinguish dummy discharge cells of the non-display area. The method of claim 1, The main partition wall is formed in any one of the form of a stripe or fishbone plasma display panel. The method of claim 1, The fishbone auxiliary partition wall is A first partition wall extending from the main partition wall; A second partition wall protruding to the left of the first partition wall; And a third partition wall protruding to the right of the first partition wall. The method of claim 3, wherein And a third partition wall protruding from the K-th first partition wall and a second partition wall protruding from the K + 1st first partition wall. The method of claim 3, wherein And a third partition wall protruding from the K-th first partition wall and a second partition wall protruding from the K + 1st first partition wall and are spaced apart from each other with a predetermined distance therebetween. The method of claim 1, The discharge cells of the display area A pair of sustain electrodes crossing the main partition wall; And an address electrode intersecting the sustain electrode pair. The method of claim 6, The dummy discharge cells And a dummy electrode formed on the same plane as the sustain electrode pair and intersecting the address electrode.