KR100612283B1 - Plasma display panel - Google Patents

Abstract

The plasma display panel of the present invention is to reduce the heat generated in the display area during the aging process to improve aging defects and aging effects, and to form a discharge cell for displaying an image by gas discharge to form a sealed first substrate. And a second substrate, a display electrode facing each other in discharge cells in the first substrate and the second substrate, an electrode terminal for drawing the display electrode to a non-display area formed outside the display area by driving the display electrode, And an insulating layer extending on the electrode terminal in a direction crossing the electrode terminals, and a multilayer terminal drawn out from the electrode terminal onto the insulating layer.

Aging, Plasma, Display, Bar

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

1 is a plan view of a state of aging a plasma display panel according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a portion of the common bar portion for aging on the sustain electrode side of FIG. 1.

3 is a partially enlarged perspective view of a common bar portion for aging of the sustain electrode side of FIG. 1.

FIG. 4 is an enlarged view of a portion of the common bar for aging on the scan electrode side of FIG. 1.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (hereinafter referred to as a 'PDP') that improves aging defects.

In general, a PDP is a display element for displaying an image using a gas discharge phenomenon, and is excellent in various display capacities such as display capacity, brightness, contrast, afterimage, viewing angle, and the like. The PDP generates plasma discharge between the electrodes by a direct current or alternating voltage applied to the electrodes, and excites the phosphor with vacuum ultraviolet rays emitted therefrom to generate visible light for displaying an image. This PDP is manufactured through a number of manufacturing processes, which are roughly divided into pre-process, post-process, and module process. The entire process is a process of forming various films on the front substrate and the back substrate. The post-process is a process of sealing the front substrate and the back substrate, exhausting, injecting discharge gas, tip-off, and aging and inspecting the exhaust substrate. The module process is a process of attaching the chassis base and the circuit to the finished PDP.

In the aging process, the aging process applies a current to the electrode of the tip-off PDP and discharges it for a predetermined period of time, that is, driving the PDP. Stabilize. In the early stage of aging, the discharge voltage increases, but when aging is sufficiently performed, the discharge voltage and luminance are maintained at a constant level. The stabilization of the characteristics of the PDP by aging means that the crystallinity of MgO is changed by the discharge, the surface of the MgO is activated, the discharge gas is stabilized, the phosphor is cleaned, and the discharge occurs stably. It means that the phosphor emits light sufficiently.

In order to obtain such an aging effect, the aging process is performed in such a manner that a voltage is applied to the sustain electrode and the scan electrode of the PDP through respective common bars for aging to generate a discharge at the entire surface of the PDP. As a result, it generates a lot of heat in the display area during aging, and due to this excessive heat, it is difficult to apply an appropriate waveform to the sustain electrode and the scan electrode, and it causes a temperature difference between the display area and the non-display area and causes the PDP to break. Have

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a plasma display panel which reduces heat generated in a display area during an aging process to improve aging defects and aging effects.

According to an exemplary embodiment of the present invention, a plasma display panel includes a first substrate and a second substrate which are formed to discharge discharge cells displaying an image by gas discharge, and display electrodes facing each other in discharge cells in the first substrate and the second substrate. An electrode terminal for drawing the display electrode to a non-display area formed outside the display area by driving the display electrode, an insulating layer extending in a direction crossing the electrode terminals on the electrode terminal, and the electrode terminal And a multilayer terminal drawn out onto the insulating layer.

The multilayer terminal may be formed at a predetermined number of electrode terminals among a plurality of electrode terminals, and may be formed at even or odd electrode terminals among consecutively arranged electrode terminals, or three, four, among consecutively arranged electrode terminals. It is formed at one electrode terminal per set of electrode terminals with a set of .., and the heat generated in the display area can be reduced by aging the PDP at regular intervals.

The insulating layer and the multilayer terminal may be formed on an electrode terminal connected to the sustain electrode of the display electrode including the sustain electrode and the scan electrode, or an electrode terminal connected to the scan electrode, or may be formed on both electrode terminals.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a plan view of a state of aging a plasma display panel according to an embodiment of the present invention.

Referring to the PDP, a PDP according to an embodiment of the present invention is formed of a first substrate (1, hereinafter referred to as "back substrate") and a second substrate (hereinafter, referred to as "front substrate"). It is formed as a face facing sealing structure. Partition walls are provided between the rear substrate 1 and the front substrate 3, and the partition walls are formed by dividing a plurality of discharge cells capable of causing gas discharge. In a discharge cell displaying an image by gas discharge, a phosphor layer which is excited by vacuum ultraviolet rays and generates red, green and blue visible light is formed.

An address electrode (not shown) is formed on the rear substrate 1, and display electrodes 5 and 7 are formed on the front substrate 3 in a direction crossing the address electrode, and the address electrode and the display electrode 5, The intersection of 7) corresponds to the discharge cell described above. The display electrodes 5 and 7 are formed in a manner in which the discharge cells face each other so as to cause discharge in the discharge cells. The PDP on which the rear substrate 1 and the front substrate 3 are sealed is provided with a display area 9 which generates discharge as described above and actually implements an image, and is provided outside the display area 9 so as not to implement an image. It is divided into the non-display area 11.

In the display area 9, the display electrodes 5 and 7 described above are formed in a dischargeable structure, and in the non-display area 11, electrodes for extending the display electrodes 5 and 7 from the display area 9 are extended. Terminals 13 and 15 are provided respectively. These electrode terminals 13 and 15 are connected to respective driving circuits (not shown) through FPC (flexible printed circuit), and various pulse waves applied from the driving circuits are applied to the display electrodes 5 and 7. Will be authorized. The display electrodes connected to the electrode terminals 13 and 15, i.e., the sustain electrode 5 and the scan electrode 7, respectively generate reset discharge and sustain discharge by means of reset pulse waves and sustain pulse waves applied thereto. The image is implemented in the area 9. Prior to this, the scan electrode 7 causes an address discharge in the display area 9 by the scan pulse wave applied to the address electrode and the address pulse wave applied to the address electrode, so as to first select a discharge cell to display an image. . In addition, since the sustain electrode 5 is applied with a common voltage unlike the scan electrode 7, the electrode terminal 13 which leads the sustain electrode 5 to the non-display area 9 is connected to the short bar 14. It is preferable.

The PDP generates an image in the display area 9 by applying respective pulse waves corresponding to the reset period, the address period, and the sustain period to the sustain electrode 5 and the scan electrode 7 including the above-described address electrode. Will be implemented.

Such a PDP is a back plate manufacturing step of forming an address electrode and a partition wall on the back substrate 1, and a front plate manufacturing step of forming display electrodes 5 and 7 on the front substrate 3 separately, and then on the back surface. The plate and the front plate are sealed to each other, the air is discharged between the front plate and the back plate, and a discharge gas is injected and sealed between the exhausted front plate and the back plate, and then completed through an aging process.

The aging process of the PDP stabilizes the electrical and optical characteristics of the PDP by applying a current to the sustain electrode 5 and the display electrode 7 of the tip-off PDP to drive the PDP for a predetermined period of time. In the PDP aged through this process, the MgO of the MgO protective film (not shown) covering the dielectric layers (not shown) on the display electrodes 5 and 7 is activated, the discharge gas charged in the discharge cell is stabilized, and impurities are removed. The phosphor layer is cleaned while being removed.

This aging process connects all of the electrode terminals 13 which lead out the sustain electrode 5 to one side of the PDP (left of FIG. 1) to the common bar 17, and scans to the other side of the PDP (right side of FIG. 1). All of the electrode terminals 15 leading to the electrode 7 are connected to another common bar 19, and a discharge current is applied to the common bars 17 and 19 on both sides thereof so that the discharge cells of the display region 9 are fixed. It will emit light for a period of time.

Since this aging process generates a large amount of heat because a high-frequency high-voltage discharge current is applied, it is necessary to reduce the heat generated in the display area 9 as much as possible and limit the discharge current. If the heat generated in the display area 9 is small, the temperature difference between the display area 9 and the non-display area 11 is small, thereby preventing the PDP from being damaged. In addition, when the discharge current is limited, aging defects are improved and stable aging is possible even in high-Xe PDP and supercapacitor PDP aging.

To this end, an embodiment of the present invention includes insulating layers 21 and 23 on electrode terminals 13 and 15 for leading sustain electrode 5 and scan electrode 7 to non-display area 11. The thing provided with the multilayer terminal 25 and 27 in this insulating layer 21 and 23 is illustrated (refer FIG. 2). FIG. 1 shows the back surface of the front substrate 3 with the back substrate 3 removed from the back substrate 3 side of the PDP for convenience of description of such a structure.

FIG. 2 is an enlarged partial view of the common bar portion for aging of the sustain electrode side of FIG. 1, FIG. 3 is a partially enlarged perspective view of the common bar portion for aging of the sustain electrode side of FIG. 1, and FIG. 4 is a scan electrode of FIG. A partial enlarged view of the common bar portion for side aging.

Referring to the drawings, the insulating layers 21 and 23 and the multilayer terminals 25 and 27 will be described. The insulating layers 21 and 23 and the multilayer terminals 25 and 27 may include the sustain electrode 5 and the scan electrode 7. It may be provided only on one side of) may be provided on both sides, this embodiment shows that provided in both sides in Figure 1 for convenience, in Figures 2, 3, and 4 are respectively provided in one side It is shown as, and will be described below as being provided on both sides. The one insulating layer 21 and the multilayer terminal 25 are formed on the electrode terminal 13 which leads the sustain electrode 5 to the non-display area 11, and the other insulating layer 23 and the multilayer terminal ( 27 is formed on the electrode terminal 15 which leads the scanning electrode 7 to the non-display area 11. That is, the multilayer terminals 25 and 27 are connected to each of the sustain electrodes 5 and the scan electrodes 7 to form a part of the electrodes 5 and 7, respectively, and the sustain electrodes 5 and the scan electrodes are respectively. It is made possible to selectively apply a discharge voltage to (7).

The insulating layers 21 and 23 extend on the electrode terminals 13 and 15 in a direction intersecting with the electrode terminals 13 and 15. The multilayer terminals 25 and 27 are connected to the electrode terminals 13 and 15 which are respectively drawn out from the sustain electrode 5 and the scan electrode 7, and are separated from each other and provided on the insulating layers 21 and 23, respectively. . That is, display electrodes 5 and 7 are formed on the front substrate 1, and insulating layers 21 and 23 are formed on the display electrodes 5 and 7, respectively, and on the insulating layers 21 and 23. Duplex terminals 25 and 27 are formed, respectively, and during aging, the multilayer terminals 25 and 27 are connected by respective common bars 17 and 19.

The multilayer terminals 25 and 27 enable supply of a discharge current to the sustain electrode 5 and the scan electrode 7 at the time of aging without passing through the electrode terminals 13 and 15. Each of the multilayer terminals 25 and 27 is formed to have a smaller number than the corresponding total number of the electrode terminals 13 and 15, so that all of the discharge cells of the display area 9 are not discharged and some of them are discharged. Only the cells are discharged so that the entire display area 9 can be aged. As a part of the display area 9 is aged as described above, heat is generated lower than that of the entire area of the display area 9.

On the other hand, the multilayer terminals 25 and 27 are formed one by one in a predetermined number of electrode terminals 25 and 27 among the plurality of electrode terminals 13 and 15. That is, the multilayer terminals 25 and 27 are selectively formed in the electrode terminals 13 and 15 at even or odd positions among the electrode terminals 13 and 15 arranged in succession on both sides of the PDP, respectively.

In addition, the multilayer terminals 25 and 27 are provided in the smallest number of the electrode terminals 13 and 15 within the range in which the aging effect of the PDP can be realized so that the minimum area of the display area 9 can be aged. It is desirable to be. That is, the multilayer terminals 25 and 27 form a set of three, four or more electrode terminals 13 and 15 among the electrode terminals 13 and 15 arranged in succession, and one electrode terminal in each set. It may be formed only at (13, 15). As described above, aging is performed only on the discharge cells corresponding to the electrode terminals 13 and 15 connected to some of the display electrodes 5 and 7, and the aging is not performed in the discharge cells in the vicinity thereof. The discharge cells in the vicinity that do not have a relatively low discharge voltage as compared to the discharge cells subjected to aging directly, and has the advantage of improving the luminance and the quality of the vacuum ultraviolet rays.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

As described above, according to the present invention, an insulating layer is provided on the electrode terminal of the display electrode, and a multi-layer terminal drawn out of one of a predetermined number of electrode terminals is provided on the insulating layer, and the aging common bar is provided on the multilayer terminal. By applying the current to the PDP and aging the PDP at a predetermined interval, the overall heat generated in the display area is reduced, thereby preventing the PDP from being damaged due to the temperature difference between the display area and the non-display area.

In addition, according to the present invention, since the aging is performed by applying a current to a part of the display electrode, the discharge current is limited as compared with the aging as a whole. As a result, the defects of high xenon and supercapacitor PDP aging are improved and stable. It has the effect of enabling aging.

In addition, according to the present invention, since aging is carried out only on a part of the surface and no aging is performed in the vicinity thereof, the discharge voltage is relatively lowered in the vicinity where the aging is not performed directly, and the luminance and the quality of the vacuum ultraviolet ray are excellent. .

Claims (8)

A first substrate and a second substrate sealed to each other by forming a discharge cell for displaying an image by gas discharge; Display electrodes facing each other in discharge cells in the first substrate and the second substrate; An electrode terminal for drawing the display electrode to a non-display area formed outside the display area by driving the display electrode; An insulating layer extending on the electrode terminal in a direction crossing the electrode terminals; And a multilayer terminal drawn out from the electrode terminal onto the insulating layer. The method of claim 1, And the multilayer terminal is formed on a predetermined number of the electrode terminals among a plurality of the electrode terminals. The method of claim 1, And wherein the multilayer terminal is selectively formed at an even number of electrode terminals or an odd number of electrode terminals among the electrode terminals arranged successively. The method of claim 1, And the multilayer terminal is formed on one electrode terminal per set of electrode terminals with one or more sets of three or more electrode terminals arranged in series. The method of claim 1, And the insulating layer and the multilayer terminal are formed on the sustain electrode terminal of the display electrode including the sustain electrode and the scan electrode. The method of claim 1, And the insulating layer and the multilayer terminal are formed on the scan electrode terminal of the display electrode including the sustain electrode and the scan electrode. The method of claim 1, And the insulating layer and the multilayer terminal are formed on both terminals of the display electrode including the sustain electrode and the scan electrode. The method of claim 1, And a terminal connected to the sustain electrode of the display electrode in common by a short bar, and a terminal connected to the scan electrode separately formed to apply respective pulses.

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