KR20030062799A - Plasma display panel - Google Patents

Abstract

PURPOSE: A plasma display panel is provided to achieve improved uniformity of discharge by maintaining the superimposed area between the first and second electrodes and address electrode constant in all discharge cells. CONSTITUTION: A plasma display panel comprises a plurality of first electrodes(50Y) and second electrodes formed of transparent electrodes; and a plurality of cut-out portions(52) formed on the first and second electrodes. The gap formed between the cut-out portions is set as 1/n of a sub pixel, wherein n is an integer larger than zero.

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 improving the uniformity of discharge.

Recently, various flat panel displays have been developed to reduce weight and volume, which are disadvantages of cathode ray tubes. Such flat panel displays include Liquid Crystal Display (LCD), Field Emission Display (FED), Plasma Display Panel (PDP), and Electro-Luminescence (EL). And display devices.

PDP is a display device using a gas discharge has the advantage that it is easy to manufacture a large panel. As a PDP, a three-electrode AC surface discharge type PDP having three electrodes and driven by an alternating voltage is typical.

Referring to FIG. 1, a discharge cell of a three-electrode AC surface discharge type PDP has a first electrode 12Y and a second electrode 12Z formed on the upper substrate 10, and an address formed on the lower substrate 18. An electrode 20X is provided.

The first and second electrodes 12Y and 12Z are made of a transparent material to transmit light supplied from the discharge cells. Bus electrodes 13Y and 13Z formed of a metal material are formed on the rear surfaces of the first electrode 12Y and the second electrode 12Z to be parallel to the first and second electrodes 12Y and 12Z. The bus electrodes 13Y and 13Z are used to supply driving signals to the first and second electrodes 12Y and 12Z having high resistance values.

The upper dielectric layer 14 and the passivation layer 16 are stacked on the upper substrate 10 having the first electrode 12Y and the second electrode 12Z side by side. Wall charges generated during plasma discharge are accumulated in the upper dielectric layer 14. The protective layer 16 prevents damage to the upper dielectric layer 14 due to sputtering generated during plasma discharge, and increases emission efficiency of secondary electrons. As the protective film 16, magnesium oxide (MgO) is usually used.

The lower dielectric layer 22 and the partition wall 24 are formed on the lower substrate 18 on which the address electrode 20X is formed, and the phosphor 26 is coated on the surfaces of the lower dielectric layer 22 and the partition wall 24. The address electrode 20X is formed in the direction crossing the first electrode 12Y and the second electrode 12Z. The partition wall 24 is formed in parallel with the address electrode 20X to prevent ultraviolet rays and visible light generated by the discharge from leaking to the adjacent discharge cells.

The phosphor 26 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue. An inert gas such as He + Ne, He + Xe or He + Ne + Xe is injected into the discharge space provided between the upper and lower plates and the partition wall.

In the conventional PDP, the first electrode 12Y and the second electrode 12Z are installed to face each other in each of the discharge cells 1 as shown in FIG. 2. The reset pulse, the scan pulse and the first sustain pulse are supplied to the first electrode 12Y. The second sustain pulse is supplied to the second electrode 12Y.

The discharge cells are initialized when the reset pulse is supplied to the first electrode 12Y. When scan pulses are supplied to the first electrode 12Y, data pulses synchronized with the scan pulses are supplied to the address electrode 20X. At this time, address discharge occurs in the discharge cells supplied with the scan pulse and the data pulse.

After the address discharge is generated in the discharge cells, the first and second sustain pulses are alternately supplied to the first electrode 12Y and the second electrode 12Z. When the first and second sustain pulses are supplied to the first electrode 12Y and the second electrode 12Z, the sustain discharge occurs in the discharge cells in which the address discharge has occurred. In this sustain discharge, the discharge time is determined according to the gray scale value, so that an image corresponding to the gray scale value is displayed.

Meanwhile, the conventional first electrode 12Y and the second electrode 12Z are formed to face each other with a large area in the discharge cells. As described above, when the first electrode 12Y and the second electrode 12Z have a large area, a large amount of power is consumed, thereby lowering the discharge efficiency of the PDP.

In order to overcome this disadvantage, the "T" shaped electrode structure as shown in FIG. 3 has been proposed.

Referring to FIG. 3, a PDP according to another exemplary embodiment of the present invention may include an address electrode 32X, first and second bus electrodes 31Y and 31Z provided in a direction crossing the address electrode, and a first bus electrode ( A first electrode 30Y extending from 31Y and a second electrode 30Z extending from the second bus electrode 31Z are provided.

The first electrode 30Y extends from the first bus electrode 31Y in a "T" shape. The second electrode 30Z extends from the second bus electrode 31Z in a "T" shape. As such, when the first and second electrodes 30Y and 30Z are formed in a “T” shape, the total area may be reduced while keeping the length of the electrode sufficiently long. Therefore, power consumption is reduced as the area of the first and second electrodes 30Y and 30Z is reduced, thereby improving the discharge efficiency. For example, the PDP in which the "T" -shaped electrode structure is installed improves luminous efficiency by about 15% compared to the PDP shown in FIG.

In a conventional PDP having such a “T” -shaped electrode, the first and second electrodes 30Y and 30Z must be exactly aligned between the partition walls 24. However, a movement of several micrometers (μm) to several tens of micrometers (μm) occurs during the bonding process of the upper and lower substrates 10 and 18 of the PDP. As such, when the upper substrate 10 and / or the lower substrate 18 move in the bonding process, the first and second electrodes 30Y and 30Z may not be installed at the center of the discharge cell as shown in FIG. 4.

As described above, when the “T” shaped first and second electrodes 30Y and 30Z are not installed at the center of the discharge cell, discharge is unevenly generated for each cell. In addition, normal address and sustain discharges do not occur. In addition, a change in discharge voltage characteristics is caused, which in turn adversely affects image quality.

In order to overcome this disadvantage, the PDP as shown in FIG. 5 has been proposed.

Referring to FIG. 5, at least two cutouts 42 are formed on the first and second electrodes 40Y and 40Z formed of transparent electrodes in the PDP according to another exemplary embodiment. The cutouts 42 are disposed at regular intervals on the transparent electrode and are formed so as not to overlap the bus electrodes 41Y and 41Z.

The PDP according to another exemplary embodiment as described above has an advantage of being easier to align than the PDP as shown in FIG. In other words, the first and second electrodes 40Y and 40Z of the present invention may be installed regardless of the position of the cutout 42. In addition, the power consumption is reduced by the area where the cutout portion 42 is formed, thereby improving the discharge efficiency.

However, when the first and second electrodes 40Y and 40Z according to another exemplary embodiment are installed in the PDP, the areas where the first and second electrodes 40Y and 40Z and the address electrode 44X overlap in the cells are provided. This will be different. In other words, as shown in FIG. 6, the cutout 42 overlaps the address electrode 44X in the range of 100% to several% in each of the discharge cells. In addition, the cutout 42 may not overlap the address electrode 44X.

As such, when the areas overlapping the address electrodes 44X and the cutouts 42 are different in each of the discharge cells, the address discharge becomes uneven. On the other hand, such a phenomenon is more likely to occur in the asymmetric partition wall where the size of the discharge cell is different depending on the color of the phosphor (red, green or blue) applied to it.

Accordingly, it is an object of the present invention to provide a plasma display panel capable of improving the uniformity of discharge.

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

FIG. 2 is a view showing an electrode structure of the plasma display panel shown in FIG.

3 and 4 illustrate a plasma display panel according to another conventional embodiment.

5 and 6 illustrate a plasma display panel according to another conventional embodiment.

7 and 8 illustrate a plasma display panel according to a first embodiment of the present invention.

9 and 10 show a plasma display panel according to a second embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10: upper substrate 12Y, 30Y, 40Y, 50Y, 60Y: first electrode

12Z, 30Z, 40Z, 50Z, 60Z: second electrode

13Y, 13Z, 31Y, 31Z, 41Y, 41Z, 51Y, 51Z: Bus electrode

14,22 dielectric layer 16: protective film

18: lower substrate 20X, 32X, 56X, 68X, 70X, 72X: address electrode

24, 54: partition 26: phosphor layer

42,52,62,64,66: cutout

In order to achieve the above object, the plasma display panel of the present invention includes a plurality of first and second electrodes made of transparent electrodes; A plurality of cutouts formed on the first and second electrodes; The spacing of the cutouts is set to 1 / n (n is an integer of 0 or more) of the subpixel.

The spacing of the cutouts disposed in each of the red subpixel, the green subpixel, and the blue subpixel is set to 1 / n of the subpixel in which they are installed.

The present invention provides a plasma display panel in which a size of a subpixel and a width of an address electrode are different are provided, the plasma display panel comprising: a plurality of first and second electrodes formed of a transparent electrode; A plurality of cutouts formed on the first and second electrodes; The spacing of the cutouts is set to 1 / n (n is an integer of 0 or more) of the subpixels.

The spacing of the cutouts disposed in each of the red subpixel, the green subpixel, and the blue subpixel is set to 1 / n of the subpixel in which they are installed.

The width of the cutouts is set to 1 / i (i is an integer of 0 or more) of the address electrode.

The widths of the cutouts disposed in the red subpixel, the green subpixel, and the blue subpixel are set to 1 / i of the width of the address electrode provided in the subpixel in which they are installed.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 7 to 10.

7 is a diagram illustrating a plasma display panel according to a first embodiment of the present invention.

Referring to FIG. 7, in the PDP according to the first embodiment of the present invention, the sizes of the subpixels R, G, and B are different for each of red, green, and blue phosphors. As described above, the PDP of the present invention is formed at one end of the first and second electrodes 50Y and 50Z and the first and second electrodes 50Y and 50Z to receive driving pulses from the outside. An address electrode 56X formed in a direction crossing the electrodes 51Y and 51Z, the first and second electrodes 50Y and 50Z, an ultraviolet ray formed in parallel with the address electrode 56X, and generated by discharge; A partition wall 54 is provided to prevent visible light from leaking into adjacent discharge cells.

In the PDP of the present invention, the first electrode 50Y and the second electrode 50Z are provided to face each other. The reset pulse, the scan pulse and the first sustain pulse are supplied to the first electrode 50Y. The second sustain pulse is supplied to the second electrode 50Z.

The discharge cells are initialized when the reset pulse is supplied to the first electrode 50Y. When scan pulses are supplied to the first electrode 50Y, data pulses synchronized with the scan pulses are supplied to the address electrode 56X. At this time, address discharge occurs in the discharge cells supplied with the scan pulse and the data pulse.

After the address discharge is generated in the discharge cells, the first and second sustain pulses are alternately supplied to the first electrode 50Y and the second electrode 50Z. When the first and second sustain pulses are supplied to the first electrode 50Y and the second electrode 50Z, the sustain discharge occurs in the discharge cells in which the address discharge has occurred. In this sustain discharge, the discharge time is determined according to the gray scale value, so that an image corresponding to the gray scale value is displayed.

In the first embodiment of the present invention, a plurality of cutouts 52 are formed in the first and second electrodes 50Y and 50Z. As described above, since the plurality of cutouts 52 are formed in the first and second electrodes 50Y and 50Z, power consumption is reduced by the area where the cutouts 52 are formed, thereby improving the discharge efficiency.

On the other hand, in the present invention, the interval between the cutouts 52 is set to 1 / n (n is an integer of 0 or more) of the subpixels of R, G, and B. In other words, as shown in FIG. 7, the cutouts 52 formed in the R subpixel are disposed at a size T1 of 1 / n of the R subpixel. Further, the cutouts 52 formed in the G subpixel are arranged at a size T2 of 1 / n of the G subpixel. In addition, the cutouts 52 formed in the B subpixel are disposed at a size T3 of 1 / n of the B subpixel.

As such, when the cutouts 52 are disposed in the size of 1 / n of the subpixels in which the cutouts 52 are disposed, the address electrodes 56X and the first and / or second electrodes 50Y and 50Z overlap in all discharge cells. The area is the same.

In other words, when the intervals T1, T2, and T3 of the cutouts 52 are set to 1 / n of the subpixels in which they are installed, the cutouts 56 are arranged at the ratio of the subpixels. Therefore, if the cutout 52 is disposed to overlap the address electrode 56X in one particular cell, the cutout 52 is disposed to overlap the address electrode 56X in all other cells.

Meanwhile, even when the first electrode 50Y and / or the second electrode 50Z move in the process of bonding the upper substrate and the lower substrate (not shown), the overlapping ratio of the cutout 52 and the address electrode 56X is equal to all discharge cells. Will be the same in. In other words, even if the first electrode 50Y moves a predetermined 占 퐉 in the bonding process of the upper substrate and the lower substrate, the overlapping ratio of the first electrode 50Y and the address electrode 56X is the same in all the discharge cells as shown in FIG. Is set to.

As described above, in the first embodiment of the present invention, the overlapping area of the address electrode 56X and the first electrode 50Y is the same in all the discharge cells, thereby ensuring uniformity of address discharge.

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

Referring to FIG. 9, in the PDP according to the second embodiment of the present invention, the sizes of the subpixels R, G, and B and the widths of the address electrodes 68X, 70X, 72X are different for each phosphor of red, green, and blue. Is set to. That is, the size of the subpixel is set to B subpixel> G subpixel> R subpixel. Similarly, the width of the address electrode 72X formed in the B subpixel is set wider than the width of the address electrode 70X formed in the G subpixel. Further, the width of the address electrode 70X formed in the G subpixel is set wider than the width of the address electrode 68X formed in the R subpixel.

A plurality of cutouts 62, 64, 66 are formed in the first and second electrodes 60Y, 60Z of the PDP according to the second embodiment of the present invention. As described above, since the plurality of cutouts 62, 64, and 66 are formed in the first and second electrodes 60Y and 60Z, the power consumption is reduced by the area in which the cutouts 62, 64 and 66 are formed. The efficiency is improved.

On the other hand, in the present invention, the widths of the cutouts 62, 64, 66 are set to 1 / i (i is an integer of 0 or more) of the subpixels in which they are installed. Therefore, the width T2 of the cutout 64 disposed in the G subpixel is set larger than the width T1 of the cutout 62 disposed in the R subpixel. Further, the width T3 of the cutout 66 disposed in the B subpixel is set larger than the width T2 of the cutout 64 disposed in the G subpixel.

Here, the spacing of the cutouts 62, 64, 66 is set to 1 / n (n is an integer of 0 or more) of the subpixels in which they are installed. In other words, the cutouts 62 formed in the R subpixels are arranged at an interval T1 of 1 / n of the R subpixels. Further, the cutouts 64 formed in the G subpixel are arranged at an interval T2 of 1 / n of the G subpixel. In addition, the cutouts 66 formed in the B subpixel are disposed at a size T3 of 1 / n of the B subpixel.

In this way, the cutouts 62, 64, and 66 are disposed at the size of 1 / n of the subpixels in which they are installed, and the size of the cutouts 62, 64, and 66 is the address electrodes 68X and 70X in which they are installed. When it is set to correspond to the width of 72X, the area where the first and / or second electrodes 60Y and 60Z overlap in all the discharge cells is the same.

Meanwhile, even when the first electrode 60Y and / or the second electrode 60Z move in the bonding process of the upper substrate and the lower substrate (not shown), the notches 62, 64, 66 and the address electrodes 68X, 70X, The overlap ratio of 72X) becomes the same in all the discharge cells.

In other words, even if the first electrode 60Y moves a predetermined 占 퐉 in the bonding process of the upper substrate and the lower substrate, the overlapping ratio of the first electrode 60Y and the address electrodes 68X, 70X, 72X is all discharged as shown in FIG. The same is set in the cells.

As described above, according to the plasma display panel according to the present invention, the spacing between the plurality of cutouts formed in the first and second electrodes is set to 1 / n of the subpixel. As such, when the interval between the cutouts is set to 1 / n of the subpixels, the area where the first and second electrodes and the address electrode overlap in all the discharge cells is constant. As described above, in the present invention, the uniformity of discharge can be ensured by maintaining the overlap area of the first and second electrodes and the address electrode in the same in all the discharge cells.

In addition, by changing the widths of the cutouts to correspond to the widths of the address electrodes, the overlapping areas of the first and second electrodes and the address electrodes may be equally secured in all the discharge cells.

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.

Claims (6)

In the plasma display panel in which the size of the subpixel is set differently for each phosphor, A plurality of first and second electrodes made of a transparent electrode; A plurality of cutouts formed on the first and second electrodes; And the interval between the cutouts is set to 1 / n (n is an integer of 0 or more) of the subpixels. The method of claim 1, Wherein the spacing of the cutouts disposed in each of the red subpixel, the green subpixel, and the blue subpixel is set to 1 / n of the subpixels in which they are installed. In the plasma display panel in which the size of the subpixel and the width of the address electrode are set differently for each phosphor, A plurality of first and second electrodes made of a transparent electrode; A plurality of cutouts formed on the first and second electrodes; And the interval between the cutouts is set to 1 / n (n is an integer of 0 or more) of the subpixels. The method of claim 3, wherein Wherein the spacing of the cutouts disposed in each of the red subpixel, the green subpixel, and the blue subpixel is set to 1 / n of the subpixels in which they are installed. The method of claim 3, wherein And the width of the cutouts is set to 1 / i (i is an integer of 0 or more) of the address electrode. The method of claim 5, And the widths of the cutouts disposed in the red subpixel, the green subpixel, and the blue subpixel are set to 1 / i of the width of the address electrode provided in the subpixel in which they are installed.