KR20050025811A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to achieve improved durability and use efficiency of the non-display region of the plasma display panel, by varying the deposition width of a sealing frit in the outside of the display region of a lower panel. A plasma display panel comprises a lower panel(210) having a display region formed therein; a sealing frit(320) deposited in the outside of the display region such that the deposition width varies in accordance with the deposition position; and an upper panel sealed to the lower panel by the sealing frit.

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 (PDP, hereinafter referred to as PDP for convenience), and more particularly, to a PDP whose durability is improved by improving sealing.

As is well known, a plasma display device is a device that implements a desired image using plasma discharge. Such a plasma display apparatus includes a plasma display panel (PDP) in which a desired image is displayed through a plasma discharge driven by an external power supply, a chassis base firmly supporting the PDP in front of the plasma display panel, and Circuit boards are mounted on the rear surface of the chassis base to drive the PDP.

The PDP used in the plasma display device is formed by joining an upper panel and a lower panel, and a plurality of cells corresponding to pixels are formed between the upper panel and the lower panel. Is formed. In order to control the plasma discharge in each cell, a plurality of electrodes, dielectrics, barrier ribs are formed in the top panel and / or bottom panel. In addition, each cell is filled with a gas for plasma discharge, and the upper panel and the lower panel should be kept in a sealed state so that such gas (hereinafter referred to as "plasma gas") does not leak out of the PDP.

In order to seal the upper and lower panels, a sealing frit is applied to the outside of the discharge area of the PDP by using a dispenser. By sintering the applied frit with a uniform width along the edge of the PDP, the upper / lower panels are bonded and the airtightness between the bonded upper / lower panels is maintained. As an example of the sealing structure of the PDP, Korean Patent Publication No. 1998-0011609 (published date: April 30, 1998; Applicant LG Electronics Co., Ltd.) may be referred to.

According to the prior art, such sealing frits are applied with a uniform width along the edge of the lower panel of the PDP.

By the way, the plasma display device including the PDP is usually used in an upright state, and therefore, the PDP bonded to the chassis base is also used uprightly. Therefore, a larger shearing stress is applied to the sealing frit on the upper portion of the PDP as compared to the sealing frit on the lower portion of the PDP.

The shear stress that the sealing frit can withstand is proportional to the application width of the sealing frit. Considering that the sealing frit is applied to the non-discharge area of the PDP, if the total area of the sealing frit can be reduced and the same / enhanced shear stress can be tolerated, the non-discharge area of the PDP can be reduced, and thus a wide display area even with the same size PDP. (display region) can be implemented.

If the sealing frit does not withstand shear stress, it may cause leakage of discharge gas in the PDP, which may lead to panel breakage. Therefore, if the use area of the sealing frit can be made efficient, it is possible to provide a more durable PDP even with the same coating area.

In the case of applying the sealing frit with the same width, if the diagonal size of the PDP is doubled, the weight of the upper / lower panel is increased by four times its square but the frit sealing area is doubled. Therefore, the shear stress applied to the frit per unit area becomes large in proportion to the increase in the size of the PDP.

Therefore, the advantages of expanding the display area of the PDP and improving the durability of the PDP, which are obtained by the efficiency of the sealing frit coating area, can be understood as even greater advantages for the PDP having a large panel size.

Accordingly, it is an object of the present invention to provide a PDP in which the use of the area of the sealing frit applied to the outside of the display area is efficient.

A plasma display panel (PDP) according to the present invention comprises: a lower panel having a display region formed therein; Sealing frit applied to the outside of the display area by a width that varies depending on the application position; And an upper panel bonded to the lower panel by the sealing frit.

At least one of the upper panel and the lower panel is a substantially rectangular shape having four sides of an upper side, a lower side, a left side, and a right side, and the width of the upper sealing frit corresponding to the upper side is different. It is preferable that the width of the lower, left and right sealing frits corresponding to the sides are wider.

More preferably, the width of the upper sealing frit is 1.3 times or more than the width of the lower, left and right sealing frits, respectively.

It is preferable that the width of at least one of the left and right sealing frits corresponding to the left and right sides respectively increases as the closer to the upper sealing frit from the lower sealing frit. At this time, it is more preferable that the at least one sealing frit includes both the left and right sealing frits.

With respect to such left and right sealing frits, the width of the one or more sealing frits may be increased linearly or stepwise.

It is preferable that the width of the upper sealing frit is formed to be variable depending on the horizontal position.

The plasma display panel of the present invention exhibits a greater effect when the diagonal size is 60 inches or more.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the accompanying drawings are not all parts drawn to the same scale for the purpose of illustration.

1 is a block diagram of a plasma display device according to an embodiment of the present invention.

As shown in FIG. 1, a plasma display apparatus according to an exemplary embodiment of the present invention includes a display panel (PDP) 100 according to an exemplary embodiment of the present invention, and a chassis base 110 supporting the PDP 100 from a front surface thereof. And one or more driving circuits 120 mounted on the rear surface 114 of the chassis base 110 to drive the PDP 100.

The chassis base 110 and the driving circuit 120 may be used as known to those skilled in the art.

Hereinafter, the plasma display panel 100 according to an exemplary embodiment of the present invention will be described in detail with reference to FIG. 2.

2 is an enlarged partial cross-sectional view of the plasma display panel 100 according to an embodiment of the present invention.

As shown in FIG. 2, the plasma display panel 100 according to the embodiment of the present invention includes a lower panel 210 and an upper panel 250.

The upper panel 250 and the lower panel 210 are formed in a specific size (for example, 70 inches) having a diagonal size of 60 inches or more.

Elements are formed on the lower panel 210 for an image display including an address electrode 212, a dielectric 214, a partition 216, and a phosphor 218. The display area 230 is defined by the components. On the upper panel 250, an image display such as a driving electrode 252 such as an X / Y-electrode, a dielectric 254, an MgO 256, and the like is displayed in an area corresponding to the display area 230 of the lower panel 210. Components are formed.

A sealing frit 220 for bonding the upper and lower panels 250 and 210 is coated on the outside of the display area 230 of the lower panel. At this time, the sealing frit 220 is applied with a width that varies depending on the application position, and a change in the application width according to the application position will be described later.

Bonding of the upper and lower panels is completed by sintering the upper panel 250 while the display area 230 is formed and the sealing panel 220 is coated on the lower panel 210.

Hereinafter, various embodiments in which the width of the sealing frit 220 applied to the lower panel 210 in the plasma display panel 100 according to the embodiment of the present invention is changed according to the application position will be described.

First, as shown in FIG. 3, the lower panel 210 according to the embodiment of the present invention has an approximately rectangular shape having four sides of an upper side 211, a lower side 212, a left side 213, and a right side 214. Has the form In the lower panel 210, a through hole 215 is formed in a closed curve formed by the sealing frit 220. The through hole 215 is for exhausting air existing between the upper and lower plates, and the number and location thereof are not limited to those shown.

In addition, the sealing frit 320 according to the first exemplary embodiment of the present invention may include an upper sealing frit corresponding to each of the upper side 211, the lower side 212, the left side 213, and the right side 214 of the lower panel 210. 321, lower sealing frit 322, left sealing frit 323, and right sealing frit 324.

That is, the upper sealing frit 321 is applied along the upper side 211 of the lower panel 210, the lower sealing frit 322 is applied along the lower side 212 of the lower panel 210, the left sealing The frit 323 is applied along the left side 213 of the lower panel 210, and the right sealing frit 324 is applied along the right side 214 of the lower panel 210.

As shown in FIG. 3, with respect to the width of the sealing frit 220 applied to the lower panel 210, the width w1 of the upper sealing frit 321 is determined by the lower, left, and right sealing frits 322, 323, and 324. It is formed wider than the width w2, w3, w4. More specifically, the width w1 of the upper sealing frit 321 is formed to be 1.3 times or more than the widths w2, w3 and w4 of the lower, left and right sealing frits 322, 323 and 324, respectively.

As such, the width w1 of the upper sealing frit 321 is formed to be wider than the widths w2, w3 and w4 of the lower, left, and right sealing frits 322, 323, and 324, so that the shearing stress acts greatly. It is possible to lower the shear stress per unit area of the sealing frit 321. Therefore, the area efficiency outside the display screen of the PDP 100 is improved.

4 is a view showing an application width of the sealing frit 420 according to the second embodiment of the present invention.

The sealing frit 420 according to the second embodiment of the present invention includes an upper sealing frit 421 corresponding to each of the upper side 211, the lower side 212, the left side 213, and the right side 214 of the lower panel 210. ), The lower sealing frit 422, the left sealing frit 423, and the right sealing frit 424.

According to the sealing frit 420 according to the second embodiment of the present invention, the width w3 and / or w4 of the left and / or right sealing frit 423 and / or 424 is higher than the lower sealing frit 422. It is formed to increase closer to the sealing frit 421. More specifically, as shown in FIG. 4, the width w3 of the left sealing frit 423 and the width w4 of the right sealing frit 424 are respectively the upper ceiling from the lower ceiling frit 422. It increases as it approaches frit 421.

As one such form, FIG. 4 shows that the width w3 of the left sealing frit 423 and the width w4 of the right sealing frit 424 increase linearly.

5 is a view showing an application width of the sealing frit 520 according to the third embodiment of the present invention.

The sealing frit 520 according to the third embodiment of the present invention includes an upper sealing frit 521 corresponding to each of the upper side 211, the lower side 212, the left side 213, and the right side 214 of the lower panel 210. ), The lower sealing frit 522, the left sealing frit 523, and the right sealing frit 524.

According to the sealing frit 520 according to the third embodiment of the present invention, the width w3 and / or w4 of the left and / or right sealing frit 523 and / or 524 is upward from the lower sealing frit 522. It is formed to increase closer to the sealing frit 521. More specifically, as shown in FIG. 5, the width w3 of the left sealing frit 523 and the width w4 of the right sealing frit 524 are respectively the upper sealing from the lower sealing frit 522. It increases as it approaches frit 522.

As one such form, FIG. 5 shows that both the width w3 of the left sealing frit 523 and the width w4 of the right sealing frit 524 increase in steps.

As shown in Figs. 4 and 5, the left and / or right sealing frit width increases as the closer to the upper sealing frit from the lower sealing frit, so that the left and right sealing frits coating area becomes more efficient.

Regarding the sealing frits 420 and 520 according to the second and third embodiments of the present invention described with reference to FIGS. 4 and 5, the width w1 of the upper sealing frits 421 and 521 is the width of the lower sealing frits 422 and 522. (w2), the width w3 of the left sealing frits 423, 523, and the width w4 of the right sealing frits 424, 524 are formed wider (for example, each having a width 1.3 times or more).

In this case, the widths of the left sealing frits 423 and 523 and the right sealing frits 424 and 524 vary depending on their vertical positions, where the width w1 of the upper sealing frits 421 and 521 is the average of the left sealing frits 423 and 523. The width and the average width of the right sealing frits 424 and 524 may each be formed at a width 1.3 times or more.

As described above, in the description of the sealing frit according to the first embodiment of the present invention, the widths of the upper / lower / left / right sealing frits 321, 322, 323, and 324 may be used in different widths. In the description of the sealing frits 420 and 520, the width w3 of the left sealing frits 423 and 523 and the width w4 of the right sealing frits 424 and 524 may vary depending on their vertical positions.

However, the upper sealing frit may also have a different width depending on its position. The sealing frit 620 according to the fourth embodiment of the present invention having this feature will be described in detail with reference to FIG.

The sealing frit 620 according to the fourth embodiment of the present invention includes an upper sealing frit 621 and a lower sealing frit corresponding to each of the upper side 211, the lower side 212, the left side 213, and the right side 214. 622, left sealing frit 623, and right sealing frit 624.

According to the sealing frit 620 according to the fourth embodiment of the present invention, the widths w3 and w4 of the left and right sealing frits 623 and 624 are closer to the upper sealing frit 621 from the lower sealing frit 622. It is formed to increase linearly.

The width of the upper sealing frit 621 is formed differently according to its horizontal position, as shown in FIG. For example, as shown in FIG. 6, the upper sealing frit 621 is applied to a plurality of widths d1 and d2. The width d1 of the thick portion P1 and the width d2 of the thin portion P2 are obtained by taking a weighted average according to the horizontal lengths of the portions P1 and P2. The width w1 of the sealing frit 621 can be calculated.

The width w1 of the upper sealing frit 621 is larger than the widths w2, w3, and w4 of the other side sealing frits 622, 623, and 624, as in the first, second, and third embodiments described above, for example, 1.3 times. In the above width). Here, the width w3 of the left sealing frit 623 and the width w4 of the right sealing frit 624 can be calculated as the average width.

According to the sealing frit 620 according to the fourth embodiment, a plurality or a plurality of widths of the upper sealing frit 621 becomes wider, whereby other additional elements mounted on the lower panel 210 may be used. Interference can be avoided. Therefore, in applying the wide upper sealing frit 621, it is possible to further improve space efficiency.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and easily changed and equalized by those skilled in the art from the embodiments of the present invention. It includes all changes to the extent deemed acceptable.

According to the embodiment of the present invention, by changing the coating width of the sealing frit in the plasma display panel (PDP) according to the application position thereof, the outside area of the display area of the PDP can be used efficiently.

In particular, the area efficiency is improved by applying the width of the upper sealing frit wider (more preferably, 1.3 times or more) than the width of the lower, left and right sealing frits.

By allowing the left and / or right sealing frit width to increase from the lower sealing frit to the upper sealing frit, the left and right sealing frit coating areas are more efficient.

The width of this left and / or right sealing frit may be increased linearly or stepwise.

With respect to the width of the upper sealing frit, it can be formed in a width that varies depending on its horizontal position.

The efficiency of the sealing frit coating width is maximized for the plasma display panel having a diagonal size of 60 inches or more.

1 is a block diagram of a plasma display device according to an embodiment of the present invention.

2 is an enlarged partial cross-sectional view of a plasma display panel (PDP) according to an embodiment of the present invention.

3 is a diagram illustrating a sealing frit applied to a lower panel of a PDP according to a first embodiment of the present invention.

4 is a diagram illustrating a sealing frit applied to a lower panel of a PDP according to a second embodiment of the present invention.

FIG. 5 illustrates a sealing frit applied to a lower panel of the PDP according to a third embodiment of the present invention.

FIG. 6 is a diagram illustrating a sealing frit applied to a lower panel of a PDP according to a fourth embodiment of the present invention.

Claims (9)

A lower panel having a display region formed therein; Sealing frit applied to the outside of the display area by a width that varies depending on the application position; And an upper panel bonded to the lower panel by the sealing frit. In claim 1, At least one of the upper panel and the lower panel is in a substantially rectangular shape having four sides of an upper side, a lower side, a left side, and a right side. The width of the upper sealing frit corresponding to the upper side is wider than the width of the lower, left and right sealing frits corresponding to the other sides, respectively. In claim 2, And the width of the upper sealing frit is 1.3 times or more than the width of the lower, left and right sealing frits. In claim 2, The width of at least one of the left and right sealing frits corresponding to the left and right sides respectively increases as the closer to the upper sealing frit from the lower sealing frit. In claim 4, The one or more sealing frits include both the left and right sealing frits. The method of claim 4 or 5, And a width of the at least one sealing frit increases linearly. The method of claim 4 or 5, And a width of the at least one sealing frit increases stepwise. The method according to any one of claims 2 to 5, And a width of the upper sealing frit is variable depending on its horizontal position. The method according to any one of claims 2 to 5, Wherein said at least one panel has a diagonal size of at least 60 inches.