WO2004059684A1

WO2004059684A1 - Plasma display panel having black stripe

Info

Publication number: WO2004059684A1
Application number: PCT/KR2003/002834
Authority: WO
Inventors: Gwon Jin Moon
Original assignee: Orion Electric Co., Ltd.
Priority date: 2002-12-27
Filing date: 2003-12-24
Publication date: 2004-07-15
Also published as: AU2003289526A1; KR100844766B1; KR20040058785A

Abstract

Disclosed is a plasma display panel having a uniform luminance by improving a structure of a black stripe in a seam region between plasma display panels assembled to form a wide screen. In the plasma display panel, a black stripe adjacent to a cutting line of a front panel is formed narrower than others or removed in case a vertical barrier rib is formed on a rear panel while a black stripe adjacent to a cutting line of a front panel is wider formed than others in case a horizontal barrier rib is formed on a rear panel. As a result, the light quantity of cells adjacent to the cutting line (seam region) is regulated, thereby equalizing the whole luminance.

Description

PLASMA DISPLAY PANEL HAVING BLACK STRIPE

[Technical Field]

The present invention generally relates to a plasma display panel, and more specifically, to a plasma display panel having a uniform luminance by improving a structure of a black stripe [or black matrix] adjacent to a seam region of the plasma display panel assembled for configuration for a large screen.

[Background Art] Generally, a plasma display panel has been used as a flat display device such as a

liquid crystal display panel and an organic EL (electro-luminescence) panel. There is

also provided a method for embodying a screen having a desired large size by assembling

a plurality of plasma display panels two-dimensionally.

For example, in a large screen display device using a plasma display panel, different panels A, B, C and D are configured to contact each adjacent side as shown in Fig. 1.

In this case, a seam region 5 is formed between panels due to configuration of a buffer member.

Specifically, the seam region 5 includes a black stripe formed on a side of the panel, and a cutting line is contacted with pixels adjacent to the seam region in order to reduce the seam region.

As a result, a light quantity of a corresponding cell is reduced because a sealing member for sealing the cutting line intrudes into the cell region.

Additionally, a horizontal barrier rib together with a general vertical barrier rib may be formed in the black stripe adjacent to a seam line in order to prevent penetration of the sealing member.

In this case, although the degradation of the light quantity resulting from the penetration of the sealing member may be prevented, cells located in sides have more increased light quantity than general cells due to reflection of the horizontal barrier rib because there are fluorescent substances in the barrier ribs.

Therefore, the conventional plasma display panel assembled for configuration of

a large screen has an un-uniform brightness of the whole cell region due to its structural

characteristics.

[Detailed Description of the Invention]

It is an object of the present invention to reduce a width of a black stripe than those of other cells, the black stripe adjacent to a seam region configured in a front panel of a plasma display panel comprising a rear panel having a vertical barrier rib, thereby securing sufficient light quantity and uniformizing the whole brightness.

It is another object of the present invention to enlarge a width of a black strip than those of other cells, the black stripe adjacent to a seam region configured in a plasma display panel comprising a rear panel having a horizontal barrier rib and a vertical barrier rib, thereby inhibiting light quantity and uniformzing the whole brightness. In an embodiment, there is provided a plasma display panel comprising a rear panel whereon a vertical barrier rib is formed and a front panel whereon a black stripe, electrodes X and Y are sequentially separated and crossed with the vertical barrier rib, wherein at least one or more surfaces of the front panel and the rear panel is cut with a cutting line and then sealed, and wherein a black stripe adjacent to the cutting line of the black stripes has a narrower width than those of other black stripes. Here, the black stripe adjacent to the cutting line is formed to have a width sized less than 3/2 of those of other black stripes.

In another embodiment, there is provided a plasma display panel comprising a rear panel whereon a vertical barrier rib is formed and a front panel whereon a black stripe, electrodes X and Y are sequentially separated and crossed with the vertical barrier rib, wherein at least one or more surfaces of the front panel and the rear panel is cut with a cutting line and sealed, and the black stripe is not formed on the cutting line of a cell adjacent to the cutting line.

[Brief Description of the Drawings]

Fig. 1 shows a plane diagram of a general large screen plasma display device.

Fig. 2 shows a plane layout diagram according to a first embodiment of the present invention. Fig. 3 shows a plane layout diagram according to a second embodiment of the present invention.

[Preferred Embodiments]

In an embodiment, a plasma display panel has a structure wherein a front panel and a rear panel are sealed with a sealing material. An address electrode and a barrier rib are formed on the rear panel, and black stripes and electrodes X and Y are formed on the front panel.

The barrier rib formed on the rear panel is formed vertically or horizontally adjacent to a seam region according to the purpose of manufacturers. The first embodiment is applied to a structure wherein a vertical barrier rib is formed, and the second embodiment is applied to a structure wherein vertical and horizontal barrier ribs are formed.

Fig. 2 shows a plane layout diagram according to the first embodiment of the present invention. Referring to Fig. 2, a vertical barrier rib SI is overlapped with black stripes BSO,

BSl and BS2, X electrodes XI and X2, Y electrodes Yl and Y2 which are formed on the front panel.

The black stripes BSO, BSl and BS2, the X electrodes XI and X2 and the Y electrodes Yl and Y2 are sequentially separated in parallel by a predetermined distance. The vertical barrier rib SI is formed vertical to the black stripes BSO, BSl and BS2, the X electrodes XI and X2 and the Y electrodes Yl and Y2.

Here, a cell region represents a region wherein the X and Y electrodes are formed between the black stripes BSO, BSl and BS2. Light emission is performed by plasma discharge in the cell region. The black stripe BSO contacts with a cutting line, and the width of the black stripe BSO is sized less than 2/3 of those of the black stripes BSl and BS2.

That is, the area occupied by the cell region adjacent to the cutting line is reduced by the black stripe BSO.

As a result, since the light emission region of the cell region adjacent to the cutting line is broadened; smaller light quantity may be secured than other general cells.

In another embodiment, it is considered that the black stripe BSO may be removed in the cell region adjacent to the cutting line in order to secure a sufficient light emission region according to the purpose of manufacturers. This embodiment is not shown. Fig. 3 shows a plane layout diagram according to the second embodiment of the present invention.

Referring to Fig. 3, the configuration of a front panel of the second embodiment is the same as that of the first embodiment. However, the width of a black stripe BSO adjacent the cutting line is formed wider than those of other black stripes BSl and BS2. In the second embodiment, a horizontal barrier rib S2 is formed other than a vertical barrier rib SI on a rear panel.

The horizontal barrier rib S2 is located toward the cutting line in order to prevent penetration of a sealing material, and formed under the black stripe BSO adjacent to the cutting line of the front panel. The cells adjacent to the cutting line have more light quantity than other cells not in consideration of black stripes.

The cell adjacent to the cutting line has the horizontal barrier rib S2 which is not formed in other cells. The horizontal barrier rib S2 has a sidewall whereon fluorescent substances for reflecting light are coated. Since the black stripe BSO occupies a relatively broader one of luminescent areas than other black stripes BSl and BS2, the partial emission of light generated from plasma discharge of the cell by the black stripe BSO is inhibited.

Finally, the light quantity of cells adjacent to the cutting line can be secured like that of other cells, thereby uniforrnizing the whole brightness of the plasma display panel.

[Industrial Applicability]

Accordingly, in an embodiment of the present invention, the un-uniformity of the brightness which results from structural characteristics of the plasma display panel ma be removed by changing thickness of black stripes adjacent to the cutting line.

Claims

[What is Claimed is]

1. A plasma display panel comprising a rear panel whereon a vertical barrier rib is formed and a front panel whereon a black stripe, electrodes X and Y are sequentially separated and crossed with the vertical barrier rib, wherein at least one or more surfaces of the front panel and the rear panel is cut with a cutting line and then sealed, and wherein a black stripe adjacent to the cutting line of the black stripes has a narrower width than those of other black stripes.

2. The panel according to claim 1, wherein the black stripe adjacent to the cutting line is formed to have a width sized less than 2/3 of those of other black stripes.

3. A plasma display panel comprising a rear panel whereon a vertical barrier rib is formed and a front panel whereon a black stripe, electrodes X and Y are sequentially separated and crossed with the vertical barrier rib, wherein at least one or more surfaces of the front panel and the rear panel is cut with a cutting line and sealed, and the black stripe is not formed on the cutting line of a cell adjacent to the cutting line.

4. A plasma display panel comprising a rear panel whereon a vertical barrier rib and a horizontal barrier rib adjacent to a cutting line are formed and a front panel whereon a black stripe, electrodes X and Y are sequentially separated and crossed with the vertical barrier rib, wherein at least one or more surfaces of the front panel and the rear panel is cut with a cutting line and then sealed, and wherein a black stripe adjacent to the cutting line of the black stripes has a narrower width than those of other black stripes.