KR100487000B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel that can reduce power consumption and improve discharge efficiency.

The plasma display panel according to the present invention includes upper electrodes having different sizes and a plurality of blanks formed on the upper electrodes having the larger size among the upper electrodes. The blank is in either round or bullet shape.

By such a configuration, the present invention forms a wider width of the transparent electrode of the scan / hold electrode than the transparent electrode of the sustain electrode, and increases the luminance by reducing the power consumption and improves the discharge efficiency by forming a plurality of blanks. Can be.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel that can reduce power consumption and improve discharge efficiency.

Plasma Display Panel (hereinafter referred to as "PDP") is an ultraviolet light generated when an inert mixed gas such as He + Xe, Ne + Xe, He + Xe + Ne, etc. discharges to display an image by emitting phosphors. do. Such PDPs are not only thin and large in size, but also have improved in image quality due to recent technology development.

1 and 2, a discharge cell of a PDP includes an upper plate having sustain electrode pairs 14 and 16, an upper dielectric layer 18, and a passivation layer 20 sequentially formed on an upper substrate 10, and a lower substrate. A lower plate having an address electrode 22, a lower dielectric layer 24, a partition wall 26, and a phosphor layer 28 sequentially formed on (12) is provided.

The upper substrate 10 and the lower substrate 12 are spaced in parallel by the partition wall 26.

Each of the sustain electrode pairs 14 and 16 has a relatively wide width and a transparent electrode material having good light transmittance of 90% or more, for example, indium tin oxide (ITO). The electrodes 14A and 16A and the metal electrodes 14B and 16B having a relatively narrow width are formed. Here, the transparent electrode material (ITO) has a large resistance value and thus does not transmit power efficiently. Therefore, the resistive components of the transparent electrodes 14A and 16A are formed on the transparent electrodes 14A and 16A by forming metals 14B and 16B having a good conductivity, for example, silver (Ag) or copper (Cu). To compensate. The sustain electrode pairs 14 and 16 are composed of the scan / sustain electrode 14 and the sustain electrode 16.

The scan signal for panel scanning and the sustain signal for discharging sustain are mainly supplied to the scan / hold electrode 14, and the sustain signal is mainly supplied to the sustain electrode 16. Charges accumulate in the upper dielectric layer 18 and the lower dielectric layer 24.

The protective film 20 prevents damage to the upper dielectric layer 18 by sputtering, thereby increasing the lifetime of the PDP and increasing the emission efficiency of secondary electrons. As the protective film 20, magnesium oxide (MgO) is usually used.

The address electrode 22 is formed to cross the sustain electrode pairs 14 and 16. The address electrode 22 is supplied with a data signal for selecting cells to be displayed.

The partition wall 26 is formed in parallel with the address electrode 22 to prevent ultraviolet rays generated by the discharge from leaking to adjacent cells. The phosphor layer 28 is applied to the surfaces of the lower dielectric layer 24 and the partition wall 26 to generate visible light of any one of red, green, and blue. An inert mixed gas such as He + Xe, Ne + Xe, He + Xe + Ne for discharging is injected into the gas discharge space provided between the upper and lower substrates 10 and 12 and the partition wall 26.

The PDP cell is selected by the counter discharge between the address electrode 22 and the scan / sustain electrode 14, and then sustains the discharge by the surface discharge between the sustain electrode pairs 14 and 16. In the PDP cell, the fluorescent substance 28 emits light by ultraviolet rays generated during sustain discharge, so that visible light is emitted outside the cell. As a result, the PDP having cells displays an image. In this case, the PDP implements a gray scale required for displaying an image by adjusting the discharge sustain period of the cell, that is, the number of sustain discharges, according to the video data.

The widths of the transparent electrodes 14A and 16A of the scan / hold electrode 14 and the sustain electrode 16 of the conventional PDP are the same. As a result, in the conventional PDP, since a relatively strong discharge occurs on the transparent electrode 14A side of the scan / sustain electrode 14 than the transparent electrode 16A of the sustain electrode 16, the discharge efficiency is reduced. Further, the discharge efficiency of the PDP is better the smaller the ratio of the electrode area to the cell area. In other words, when the ratio of the electrode area becomes smaller, the reactive power consumed for charging the capacitance between the electrodes becomes smaller.

Accordingly, an object of the present invention is to provide a plasma display panel which can reduce power consumption and improve discharge efficiency.

In order to achieve the above object, the PDP according to the present invention includes upper electrodes having different sizes and a plurality of blanks formed on upper electrodes having a larger size among the upper electrodes. The blank is in either round or bullet shape. The upper electrodes include transparent electrodes having different sizes and metal bus electrodes formed on the transparent electrodes in the same size. The transparent electrode having a larger size among the transparent electrodes is a scan electrode to which a scan signal is supplied. The blank is formed in at least two rows. Other objects and features of the present invention in addition to the above objects will be apparent from the description of the embodiments with reference to the accompanying drawings.

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A preferred embodiment of the present invention will be described with reference to FIGS. 4 to 9.

4 and 5, the PDP according to the first embodiment of the present invention includes an upper plate having sustain electrode pairs 54 and 56, an upper dielectric layer 48, and a protective film formed on the upper substrate 40, and a lower portion. A lower plate having an address electrode 52 formed on the substrate 42, a lower dielectric layer 44, a partition (not shown) and a phosphor layer is provided. The upper substrate 40 and the lower substrate 42 are spaced in parallel by the partition wall.

The sustain electrode pairs 54 and 56 are composed of the scan / sustain electrode 54 and the sustain electrode 56, and the scan / sustain electrode 54 has a larger size than the sustain electrode 56. The scan signal for panel scanning and the sustain signal for discharging sustain are mainly supplied to the scan / sustain electrode 54, and the sustain signal is mainly supplied to the sustain electrode 56. Each of the sustain electrode pairs 54 and 56 has a relatively wide width and has a light transmittance of 90% or more, for example, transparent electrodes 54A and 56A made of indium tin oxide (ITO); And metal electrodes 54B and 56B having a relatively narrow width. Here, the transparent electrode material (ITO) has a large resistance value and thus does not transmit power efficiently. Accordingly, the resistive components of the transparent electrodes 54A and 56A are formed on the transparent electrodes 54A and 56A by forming metals 54B and 56B having a good conductivity, for example, silver (Ag) and copper (Cu). To compensate.

Charge is accumulated in the upper dielectric layer 48 and the lower dielectric layer 44. The protective film prevents damage to the upper dielectric layer 48 due to sputtering, which not only increases the lifetime of the PDP but also increases the emission efficiency of secondary electrons. As such a protective film, magnesium oxide (MgO) is usually used.

The address electrode 52 is formed to cross the sustain electrode pairs 54 and 56. The address electrode 52 is supplied with a data signal for selecting cells to be displayed. The partition wall is formed in parallel with the address electrode 52 to prevent the ultraviolet rays generated by the discharge from leaking to the adjacent cells. The phosphor layer is applied to the surface of the lower dielectric layer 44 and the partition wall to generate visible light of any one of red, green, and blue. An inert mixed gas such as He + Xe, Ne + Xe, He + Xe + Ne for discharging is injected into the gas discharge space provided between the upper and lower substrates 40 and 42 and the partition wall.

The PDP cell is selected by the counter discharge between the address electrode 52 and the scan / sustain electrode 54 and then sustains the discharge by the surface discharge between the sustain electrode pairs 54 and 56. In the PDP cell, the phosphor emits light by ultraviolet rays generated during sustain discharge, so that visible light is emitted outside the cell. As a result, the PDP having cells displays an image. In this case, the PDP implements a gray scale required for displaying an image by adjusting the discharge sustain period of the cell, that is, the number of sustain discharges, according to the video data.

As such, in order to improve the brightness of the PDP according to the embodiment of the present invention, the width W1 of the transparent electrode 54A of the scan / hold electrode 54 is the width W2 of the transparent electrode 56A of the sustain electrode 56. ), And the width of the metal electrodes 54B and 56B of the scan / sustain electrode 54 and the sustain electrode 56 is the same. This causes the discharge / relative discharge of the PDP to be relatively stronger than the transparent electrode 56A of the sustain electrode 56 at the transparent electrode 54A side of the scan / hold electrode 54. In addition to increasing the width W1 of the transparent electrode 54A of the 54, the width W2 of the transparent electrode 56A of the sustain electrode 56 which causes relatively weak discharge is reduced. The spacing between the scan / sustain electrode 54 and the sustain electrode 56 is the same as the conventional spacing. For this reason, the luminance of the PDP is increased by widening the width W1 of the transparent electrode 54A of the scan / hold electrode 54 which causes strong discharge.

5, the transparent electrode 54A of the scan / maintenance electrode 54 having a relatively wider width than the transparent electrode 56A of the sustain electrode 56 is shown in FIG. 5. Bullet-shaped blanks 62 are formed in plural. The bullet-shaped blanks 62 are formed of the metal electrodes of the scan / hold electrode 54 to prevent discoloration by reaction with the silver (Ag) electrode of the metal electrode 54B of the scan / hold electrode 54. 54B) is formed on the transparent electrode 54A of the scan / hold electrode 54 except for the overlapping portion of the transparent electrode 54A of the scan / hold electrode 54 to reduce the area of the scan / hold electrode 54. . Accordingly, the power consumption of the PDP according to the embodiment of the present invention is reduced by the area where the bullet-shaped blanks 62 are formed, thereby improving discharge efficiency. In addition, in the PDP according to the embodiment of the present invention, the rounding portions of the bullet-shaped blanks 62 are generated when voltage drops by relaxing the electric field concentration near the discharge gap between the blanks 62. The effect of increasing the luminance is obtained by preventing the discharge separation phenomenon.

Referring to FIG. 6, a plurality of blanks are provided in the transparent electrode 54A of the scan / hold electrode 54 having a relatively wider width than that of the sustain electrode 56 in the PDP according to the embodiment of the present invention. The fields 72 are formed in a rectangular shape. The blanks 72 are formed of the metal electrode 54B of the scan / hold electrode 54 and the metal electrode 54B of the scan / hold electrode 54 to prevent discoloration by reaction with the silver (Ag) electrode. It is formed on the transparent electrode 54A of the scan / hold electrode 54 except for the overlapping portion of the transparent electrode 54A of the scan / hold electrode 54 to reduce the area of the scan / hold electrode 54. Accordingly, the power consumption of the PDP according to the embodiment of the present invention is reduced by the area where the rectangular blanks 72 are formed, and the discharge efficiency is improved.

Referring to FIG. 7, at least two columns are provided in the transparent electrode 54A of the scan / hold electrode 54 having a relatively wider width than the transparent electrode 56A of the sustain electrode 56 in the PDP according to the exemplary embodiment of the present invention. Small square blanks 82 are formed. The small rectangular blanks 82 are formed on the metal electrode of the scan / hold electrode 54 to prevent discoloration by reaction with the silver (Ag) electrode of the metal electrode 54B of the scan / hold electrode 54. And formed on the transparent electrode 54A of the scan / hold electrode 54 except for the overlapping portion of 54B and the transparent electrode 54A of the scan / hold electrode 54 to reduce the area of the scan / hold electrode 54. Let's do it. Accordingly, in the PDP according to the embodiment of the present invention, power consumption is reduced and the discharge efficiency is improved as much as the area in which two or more small rectangular blanks 82 are formed.

Referring to FIG. 8, in the PDP according to the exemplary embodiment of the present invention, the transparent electrode 54A of the scan / hold electrode 54 having a relatively wider width than the transparent electrode 56A of the sustain electrode 56 has a circular shape. A plurality of blanks 92 are formed. The circular blanks 92 are formed of the metal electrodes of the scan / hold electrode 54 to prevent discoloration due to reaction with the silver (Ag) electrode of the metal electrode 54B of the scan / hold electrode 54. 54B) is formed on the transparent electrode 54A of the scan / hold electrode 54 except for the overlapping portion of the transparent electrode 54A of the scan / hold electrode 54 to reduce the area of the scan / hold electrode 54. . Accordingly, the power consumption of the PDP according to the embodiment of the present invention is reduced by the area where the circular blanks 92 are formed, and the discharge efficiency is improved.

9, in the PDP according to the embodiment of the present invention, the transparent electrode 54A of the scan / hold electrode 54 having a relatively wider width than the transparent electrode 56A of the sustain electrode 56 has a triangular shape. A plurality of blanks 102 are formed. The triangle-shaped blanks 102 are formed of the metal electrodes of the scan / hold electrode 54 to prevent discoloration by reaction with the silver (Ag) electrode of the metal electrode 54B of the scan / hold electrode 54. 54B) is formed on the transparent electrode 54A of the scan / hold electrode 54 except for the overlapping portion of the transparent electrode 54A of the scan / hold electrode 54 to reduce the area of the scan / hold electrode 54. . Accordingly, the PDP according to the embodiment of the present invention reduces power consumption by the area where the triangular blanks 102 are formed and also improves the discharge efficiency.

As such, the blanks 62, 72, 82, 92, and 102 according to the embodiment of the present invention are limited to the bullet shape, the rectangle, the at least two rows or more, the small rectangle, the circle, and the triangle shape shown in FIGS. It may be formed in various forms to reduce the area of the transparent electrode 54A of the scan / sustain electrode 54.

As described above, the plasma display panel according to the embodiment of the present invention forms the transparent electrode width of the scan / sustain electrode relatively wider than the transparent electrode of the sustain electrode and increases the luminance by forming a plurality of blanks. The power consumption can be reduced to improve the discharge efficiency.

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 of a conventional three-electrode plasma display panel.

2 is a cross-sectional view showing a discharge cell of the conventional three-electrode plasma display panel shown in FIG.

3 is a plan view showing a discharge cell of a conventional plasma display panel.

4 is a cross-sectional view illustrating a discharge cell of a plasma display panel according to an exemplary embodiment of the present invention.

FIG. 5 is a plan view showing a blank formed on an electrode of the plasma display panel shown in FIG. 4; FIG.

FIG. 6 is a plan view illustrating a rectangular blank formed in two rows formed on electrodes of a plasma display panel according to an exemplary embodiment of the present invention; FIG.

7 is a plan view illustrating a bullet shape blank formed on an electrode of a plasma display panel according to an exemplary embodiment of the present invention.

8 is a plan view illustrating a blank in a circle formed on an electrode of a plasma display panel according to an exemplary embodiment of the present invention.

9 is a plan view illustrating a triangular blank formed on an electrode of a plasma display panel according to an exemplary embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10, 40: upper substrate 12, 42: lower substrate

14, 54: scan / hold electrode 14A, 16A, 54A, 56A: transparent electrode

14B, 16B, 54B, 56B: metal electrode 16, 56: sustain electrode

18, 48: upper dielectric layer 20, 50: protective film

22, 52: address electrode 24, 54: lower dielectric layer

26: bulkhead 62, 72, 82, 92, 102: blank

Claims (5)

Upper electrodes having different sizes, A plurality of blanks are formed on the upper electrode having a larger size of the upper electrode, The blank is a plasma display panel, characterized in that any one of a circular shape and a bullet shape. The method of claim 1, The upper electrodes, Transparent electrodes having different sizes, And a metal bus electrode formed in the same size on the transparent electrode. The method of claim 2, And a transparent electrode having a large size among the transparent electrodes is a scan electrode to which a scan signal is supplied. delete The method of claim 1, And said blank is formed in at least two rows.