KR100452694B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel capable of improving the uniformity of discharge.

The plasma display panel of the present invention comprises: a plurality of first and second electrodes made of transparent electrodes; Bus electrodes formed on one side of the first and second electrodes in parallel with the first and second electrodes; A plurality of cutouts formed on the first and second electrodes; The spacing of the cutouts is set to 1 / n (n is a positive integer) of the pixel.

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, in the PDP according to another exemplary embodiment, at least two cutouts 42 are formed on the first and second electrodes 40Y and 40Z formed of transparent electrodes. 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.

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 an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

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

12Z, 30Z, 40Z: Second electrode 13Y, 13Z, 31Y, 31Z, 41Y, 41Z, 51Y: Bus electrode

14,22 dielectric layer 16: protective film

18: lower substrate 20X, 32X, 44X, 54X: address electrode

24, 52: bulkhead 26: phosphor layer

42,56: notch

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; Bus electrodes formed on one side of the first and second electrodes in parallel with the first and second electrodes; A plurality of cutouts formed on the first and second electrodes; The spacing of the cutouts is set to 1 / n (n is a positive integer) of the pixel.

The cutouts are disposed not to overlap with the bus electrode.

The plasma display panel of the present invention comprises: a plurality of first and second electrodes made of transparent electrodes; Bus electrodes formed on one side of the first and second electrodes in parallel with the first and second electrodes; A plurality of cutouts formed on the first and second electrodes; The spacing of the cutouts is set to 1 / n (n is a positive integer) of the subpixels.

The cutouts are disposed not to overlap with the bus electrode.

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 8.

7 is a diagram illustrating a plasma display panel according to an embodiment of the present invention. The PDP shown in FIG. 7 assumes that the sizes of the subpixels are the same regardless of the red, green, and blue phosphors.

Referring to FIG. 7, a PDP according to an embodiment of the present invention is formed at one end of the first electrode 50Y and the first electrode 50Y to supply a driving pulse to the first electrode 50Y. (51Y), the address electrode (54X) formed in the direction crossing the first electrode (50Y) and the address electrode (54X) formed side by side, ultraviolet rays and visible light generated by the discharge leak to the adjacent discharge cells It is provided with a partition wall 52 which prevents it from becoming.

Although only the first electrode 50Y is shown in the drawing of FIG. 7, the discharge cell is actually formed with a second electrode facing the first electrode 50Y and not shown in the same form.

A plurality of cutouts 56 are formed in the first electrode 50Y according to the embodiment of the present invention. As described above, since the plurality of cutouts 56 are formed in the first electrode 50Y, the power consumption is reduced by the area where the cutouts 56 are formed, thereby improving the discharge efficiency.

Meanwhile, in the present invention, the interval T1 of the notch 56 is set to 1 / n (n is an integer of 0 or more) of the subpixel (red, green or blue discharge cells). As such, when the interval T1 of the notches 56 is set to 1 / n of the subpixels, as shown in FIG. 7, the area where the address electrode 54X and the first electrode 50Y overlap in all the discharge cells is the same. do.

In other words, when the interval T1 of the cutouts 56 is set to 1 / n of the subpixels, the cutouts 56 are arranged at the ratio of the subpixels. Therefore, if the cutout 56 is partially overlapped with the address electrode 54X in one particular cell, the cutout 56 is partially overlapped with the address electrode 54X in all other cells. In addition, as shown in FIG. 8, when the cutout 56 is completely overlapped with the address electrode 54X in one specific cell, the cutout 56 is disposed to completely overlap with the address electrode 54X in all other cells.

As described above, in the present invention, the area where the address electrode 54X and the first electrode 50Y overlap each other is the same, thereby ensuring uniformity of address discharge.

Meanwhile, in the present invention, the interval T1 of the cutouts 56 may be set to 1 / n of the pixel formed by combining the red, green, and blue discharge cells. If the spacing of the cutouts 56 is set to 1 / n of the pixel, the area where the address electrode 54X and the first electrode 50Y overlap in all discharge cells is the same to ensure uniformity of address discharge. have.

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 pixel or the subpixel. If the interval between the cutouts is set to 1 / n of the pixel or subpixel, the area where the first electrode (or the second electrode) and the address electrode overlap in all the discharge cells becomes constant. That is, in the present invention, the uniformity of the discharge can be ensured by keeping the area where the address electrode and the first electrode (or the second electrode) overlap each other.

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 (4)

A plasma display panel in which red, green, and blue phosphors are coated to form pixels. A plurality of first and second electrodes made of a transparent electrode; Bus electrodes formed on one side of the first and second electrodes in parallel with the first and second electrodes; A plurality of cutouts formed on the first and second electrodes; Wherein the interval between the cutouts is set to 1 / n of the pixel (n is a positive integer). The method of claim 1, And the cutouts are disposed not to overlap the bus electrode. A plasma display panel in which red, green, and blue phosphors are coated to form pixels. A plurality of first and second electrodes made of a transparent electrode; Bus electrodes formed on one side of the first and second electrodes in parallel with the first and second electrodes; A plurality of cutouts formed on the first and second electrodes; And the interval between the cutouts is set to 1 / n (n is a positive integer) of the subpixels. The method of claim 3, wherein And the cutouts are disposed not to overlap the bus electrode.