KR100733300B1 - Plasma Display Device - Google Patents

Abstract

The present invention relates to a plasma display apparatus, comprising an upper substrate on which a bus electrode and a transparent electrode electrically connected to the bus electrode are formed, and a lower substrate on which a partition wall is formed to face the upper substrate and partition a discharge space. The bus electrode is formed so as not to overlap with the discharge space, and the transparent electrode is formed to protrude from the bus electrode into the discharge space, so that the width of the transparent electrode overlapping with the bus electrode is small. As a result, the effective area of the upper electrode is narrowed, so that the panel capacitance can be reduced, thereby increasing the discharge efficiency.

Plasma Display Panel, Transparent Electrode, Bus Electrode, Scan Electrode, Sustain Electrode

Description

Plasma Display Device

1 is a first embodiment of a discharge cell electrode structure according to the prior art,

Figure 2 is a second embodiment of a discharge cell electrode structure according to the prior invention,

3 is a view illustrating an overlapping portion of a bus electrode and a transparent electrode according to the related art;

4 is a configuration diagram of a general plasma display panel;

5A and 5B are diagrams illustrating first and second embodiments of the discharge cell electrode structure according to the present invention;

6A and 6B are diagrams illustrating third and fourth embodiments of the discharge cell electrode structure according to the present invention.

<Explanation of symbols on main parts of the drawings>

30: upper substrate 31: scan electrode

31a: transparent electrode 31b: metal electrode

32: sustain electrode 32a: bus electrode

32b: transparent electrode 40: lower substrate

41: address electrode 43: partition wall

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, wherein a metal electrode and a transparent electrode having at least one protrusion formed from the metal electrode into a discharge space form a scan electrode or a sustain electrode, and the width of the transparent electrode is the metal. The present invention relates to a plasma display device in which a capacitance formed by the upper electrode is reduced since the electrode is narrower than the electrode.

In general, a plasma display panel uses visible light of red (R), green (G), and blue (B) generated by vacuum ultraviolet rays (VUV) radiating from a plasma obtained through gas discharge to excite phosphors. The display device to implement a predetermined image.

In the plasma display apparatus, a discharge cell is selected as a counter discharge between a scan electrode and an address electrode, and an image is realized due to a surface discharge between the scan electrode and the sustain electrode.

Looking at the configuration of the plasma display device in more detail, the panel is formed by combining the upper substrate and the lower substrate facing the upper substrate, the scan substrate, the sustain electrode and the dielectric layer is formed on the upper substrate.

The lower substrate includes a plurality of address electrodes, a dielectric layer for protecting and insulating the address electrode, a partition partitioning a discharge cell, the dielectric layer and the partition wall, which are applied to emit visible light by plasma discharge. Phosphor layer is formed.

In addition, a scan electrode and a sustain electrode and a dielectric layer for protecting and insulating the electrode are formed on the upper substrate, and the scan electrode and the sustain electrode are formed of a bus electrode and a transparent electrode, respectively.

As voltage is applied to either the address electrode, the scan electrode or the sustain electrode, an address discharge is generated to select a discharge cell, and a sustain discharge is generated between the scan electrode and the sustain electrode to display an image.

The discharge cell electrode structure of the plasma display device configured as described above will be described with reference to FIGS. 1 to 3.

1 and 2 are views of the electrode structure of a conventional discharge cell, in which a discharge space is partitioned by a partition 23, and a bus electrode 11b is formed on the partition 23. As shown in FIG. In addition, a transparent electrode 11a protruding from the bus electrode into the discharge space is formed. For example, the transparent electrode 11a and the bus electrode 11b are scan electrodes Y connected to the scan driver.

In particular, referring to FIG. 3, a region where the transparent electrode 11a and the bus electrode 11b overlap with each other, the width of the transparent electrode 11a is formed to be about 100 μm in order to increase the cross-sectional area of the overlapping region. The bus electrode 11b has a width of about 80 μm.

That is, as the cross-sectional area of the region where the metal bus electrode 11b receiving the driving signal from the scan driver and the transparent electrode 11a overlap, the sustain discharge is smoothly generated. As described above, the transparent electrode 11a protruding into the discharge space is large.

However, in the plasma display device according to the related art, the overlapping area of the transparent electrode 11a and the metal bus electrode 11b is increased, and the effective areas of the scan electrode and the sustain electrode formed on the upper substrate are increased. In this case, the effective area is the area of the transparent electrode 11a overlapping the partition wall 23 as a portion indicated by a dotted line, and as the effective area becomes wider, capacitance increases due to the transparent electrode 11a and the dielectric. .

The present invention has been made to solve the above problems of the prior art, the object is a metal electrode and a transparent electrode formed with at least one protrusion from the metal electrode into the discharge space to form a scan electrode or a sustain electrode, Since the width of the transparent electrode is formed narrower than the metal electrode to provide a plasma display device that the capacitance by the top electrode is reduced.

Plasma display device according to the present invention for solving the above problems is the upper substrate is formed with a bus electrode and a transparent electrode electrically connected to the bus electrode, and a partition wall is formed facing the upper substrate to partition the discharge space is formed; And a lower substrate, wherein the bus electrode is formed so as not to overlap the discharge space, and the transparent electrode is formed to protrude from the bus electrode into the discharge space.

The transparent electrode is formed to protrude in a T-shape, and at least two or more protrusions extending into the discharge space are formed.

The upper substrate includes at least two bus electrodes formed to face each other, and each bus electrode is formed in a non-discharge space so as not to overlap the discharge space.

The transparent electrode includes a first portion overlapping the bus electrode, a second portion formed with at least one protrusion from the first portion into the discharge space, and a third portion connecting the second portion. It is composed.

In particular, the width of the first portion is formed smaller than the width of the bus electrode, the width of the second portion is characterized in that 5% to 30% of the width of the discharge cell.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 4 is a perspective view showing the configuration of a plasma display panel according to the present invention. The scan electrodes and the sustain electrodes of the plasma display panel should be arranged in units of discharge cells, but are shown one by one for convenience.

First, the scan electrode (Y) and the sustain electrode (Z) are formed on the upper substrate (30), and the upper dielectric layer (33) is stacked adjacent to the scan electrode (Y) and the sustain electrode (Z). In addition, a protective layer 34 for protecting the upper dielectric layer 33 is included.

In addition, the lower substrate 40 includes an address electrode X facing the scan electrode Y and the sustain electrode Z formed on the upper substrate 30, and a lower dielectric layer 42 stacked on the address electrode. Is formed. In addition, the phosphor 44 is coated on the lower dielectric layer 42 and the partition 43 that partitions the discharge space.

Discharge cells are selected by opposing discharges between the scan electrodes Y and the address electrodes X during an address period, and surface discharges between the scan electrodes Y and the sustain electrodes Z during a sustain period. A vacuum ultraviolet ray (VUV) is generated by the discharge, and the phosphor 44 coated inside the discharge space is excited / light-emitting to display an image.

5A and 5B are diagrams illustrating first and second embodiments of the discharge cell electrode structure according to the present invention. FIG. 5A is a view illustrating that only one transparent electrode of the scan electrode and the sustain electrode is formed to protrude in a T shape, and FIG. 5B illustrates that the transparent electrode of each of the scan electrode and the sustain electrode protrudes in a T shape and faces each other. It is a figure which illustrates that.

First, when the electrode illustrated in FIG. 5A is a scan electrode Y, the metal bus electrode 31b constituting the scan electrode is formed in the non-discharge space so as not to overlap the discharge space. The metal electrode receives a driving signal from a scan driver (not shown).

The transparent electrode 31a electrically connected to the metal electrode 31b may have at least one protruding portion protruding into the discharge space in a T shape, and the transparent electrode 31a may be the bus electrode 31b. And a first portion 31_1 overlapping the second portion 31 and a second portion 31_2 formed with at least one protrusion from the first portion into the discharge space.

The structure of the transparent electrode 31a configured as described above is applied to any one electrode Y provided on the upper substrate as in the first embodiment shown in FIG. 5A, and the structure of the remaining transparent electrodes is limited by the present embodiment. It doesn't work.

However, the transparent electrodes protruding into the discharge space are opposed to each other, and sustain discharge is generated between the transparent electrodes by a driving signal supplied from each bus electrode 31b.

In addition, the structure of the transparent electrode may be a scan electrode (Y) and a sustain electrode (Z) provided on the upper substrate as shown in the second embodiment shown in Figure 5b, from each bus electrode (31b) inside the discharge space Sustain discharge is generated between the transparent electrodes 31a which protrude.

In this case, in the transparent electrode 31a according to the first and second embodiments, the width T1 of the first portion 31_1 overlapping the bus electrode 31b is smaller than the width T2 of the bus electrode. Since the first portion 31_1 is formed, the first portion 31_1 does not protrude to the outside of the bus electrode 31b.

In addition, the width B of the second portion is 5% to 30% of the width A of the discharge cell. Compared to this, the panel capacitance is greatly reduced.

6A and 6B are diagrams illustrating third and fourth embodiments of the discharge cell electrode structure according to the present invention. 6A is a view illustrating that two or more protrusions are formed in a T shape on only one of the transparent electrodes of the scan electrode and the sustain electrode, and FIG. 6B is a T-shape of the transparent electrodes of each of the scan electrode and the sustain electrode. It is a diagram illustrating that protruding to form.

First, when the electrode shown in FIG. 6A is called a scan electrode Y, the metal bus electrode 31b 'constituting the scan electrode is formed in the non-discharge space so as not to overlap the discharge space. The bus electrode 31b 'receives a driving signal from a scan driver (not shown).

The transparent electrode 31a ', which is electrically connected to the bus electrode 31b', has two or more protrusions protruding into the discharge space in a T shape, and the transparent electrode overlaps the bus electrode. And a portion 31_1, a second portion 31_2 having at least one protrusion formed from the first portion into the discharge space, and a third portion 31_3 connecting the second portion.

The structure of the transparent electrode 31a 'configured as described above is applied to any one electrode provided on the upper substrate as in the third embodiment shown in FIG. 6A, and the structure of the transparent electrode of the remaining electrodes is limited by the present embodiment. It doesn't work.

However, the transparent electrodes protruding into the discharge space are opposed to each other, and sustain discharge is generated between the transparent electrodes by a driving signal supplied from each bus electrode 31b '.

In addition, the structure of the transparent electrode may be a scan electrode (Y) and a sustain electrode (Z) provided on the upper substrate as shown in the fourth embodiment shown in Figure 6b, the discharge space from each bus electrode (31b ') A sustain discharge is generated between the transparent electrodes 31a 'protruding into the interior.

In this case, since the width T1 of the first portion overlapping the bus electrode is smaller than the width T2 of the bus electrode in the transparent electrode 31a 'according to the third and fourth embodiments, One portion 31_1 does not protrude to the outside of the bus electrode 31b '.

In addition, the sum b1 + b2 of the width of the second portion 31_2 is 5% to 30% of the width A of the discharge cell, and the cross-sectional area of the region overlapping the partition 43 is compared with the conventional invention. This reduces, thereby improving the panel capacitance.

As described above, the plasma display device according to the present invention has been described with reference to the illustrated drawings. However, the present invention is not limited by the embodiments and drawings disclosed herein, and is provided to those skilled in the art within the scope of the technical idea of the present invention. Application is possible.

In the plasma display apparatus according to the present invention configured as described above, the transparent electrode is formed to have a width smaller than that of the metal electrode, and the transparent electrode protrudes in a T shape from the bus electrode, so that the transparent electrode and the partition wall overlap. This reduces the panel capacitance.

Claims (8)

An upper substrate on which a transparent electrode including a bus electrode and a first portion overlapping in an extending direction of the bus electrode and a second portion protruding from the first portion is formed; A lower substrate on which the horizontal and vertical bulkheads are formed, And the bus electrode is wider than the width of the first portion in the vertical partition wall direction and narrower than the width of the horizontal partition wall. In claim 1, And the extension of the bus electrode and the transparent electrode is formed in substantially the same direction as the horizontal partition wall. In claim 1, And the second portion protrudes in the discharge space in the vertical partition wall direction. In claim 1, And the second portion is formed in a direction substantially perpendicular to the first portion. In claim 1, And the second portion is T-shaped. In claim 3, And the second portion includes at least one protrusion. In claim 1, And a horizontal width of the second portion overlapping the horizontal partition wall is 5% to 30% of the horizontal width of the discharge space. In claim 6, The transparent electrode further includes a third portion connecting the at least one protrusion.

Images