KR100806304B1 - Plasma display device - Google Patents

Abstract

A plasma display device is provided to prevent an error discharge between sustain electrodes by forming a ventilating hole to be apart from the sustain electrodes and a composite driving board. A plasma display device includes a PDP(Plasma Display Panel), a composite driving board(250), and a ventilating hole(300). A pair of sustain electrodes are formed on the PDP. The composite driving board generates a signal for driving the PDP. The ventilating hole is arranged to drain air from the panel to fill discharge gas in the ventilating hole. The pair of sustain electrodes are elongated from one side of the panel and connected to the composite driving board. The ventilating hole is formed on an edge portion of the other side of the panel.

Description

Plasma Display Device

1 is a perspective view showing an embodiment of a plasma display panel according to the present invention;

2 illustrates an embodiment of an electrode arrangement of a plasma display panel;

3 is a diagram illustrating an embodiment of a time division driving method by dividing a frame into a plurality of subfields;

4 and 5 are views showing an embodiment of the position structure of the exhaust hole in the plasma display panel of the present invention;

FIG. 6 is a timing diagram illustrating an embodiment of driving signals for driving a plasma display panel for the divided subfield; FIG.

The present invention relates to a plasma display device, and more particularly, to an exhaust hole position structure of a plasma display panel used in the device.

In general, a plasma display panel is a partition wall formed between an upper substrate and a lower substrate to form one unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and An inert gas containing the same main discharge gas and a small amount of xenon is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because a thin and light configuration is possible.

In order to maintain the vibration state of the discharge cell space of the plasma display panel and to fill the discharge gas, the panel requires an exhaust hole. When the exhaust hole is formed adjacent to the driving board and the sustain electrode pair, an error discharge and staining of the panel may occur due to contamination of the exhaust hole, which may cause a problem of reducing the reliability of the PDP.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. The present invention provides a reliable plasma display apparatus by preventing contamination of exhaust holes formed in the plasma display panel to prevent mis-discharge of the sustain electrode pair and staining of the panel. There is this.

According to an aspect of the present invention, there is provided a plasma display apparatus including: a plasma display panel on which sustain electrode pairs are formed; An integrated drive board for generating a signal to drive the plasma display panel; And an exhaust hole provided for exhausting and discharging gas of the panel, wherein the sustain electrode pair extends to one side of the panel to be connected to the integrated driving board, and the exhaust hole is formed at the other side edge of the panel. Characterized in that formed.

At least one exhaust hole may be formed, and the exhaust hole is preferably formed at an edge of the panel.

The exhaust hole may be formed in one of the front side and the rear side of the panel, and the exhaust hole may be formed only at an opposite side of one side from which the sustain electrode pair extends.

Hereinafter, a plasma display device according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view showing an embodiment of a plasma display panel according to the present invention.

As shown in FIG. 1, the plasma display panel includes a scan electrode 11, a sustain electrode 12, a sustain electrode pair formed on the upper substrate 10, and an address electrode 22 formed on the lower substrate 20. It includes.

The sustain electrode pairs 11 and 12 generally include transparent electrodes 11a and 12a and bus electrodes 11b and 12b formed of indium tin oxide (ITO), and the bus electrode 11b. , 12b) may be formed of a metal such as silver (Ag) or chromium (Cr) or a stack of chromium / copper / chromium (Cr / Cu / Cr) or a stack of chromium / aluminum / chromium (Cr / Al / Cr). have. The bus electrodes 11b and 12b are formed on the transparent electrodes 11a and 12a to serve to reduce voltage drop caused by the transparent electrodes 11a and 12a having high resistance.

Meanwhile, according to the exemplary embodiment of the present invention, the sustain electrode pairs 11 and 12 may not only have a structure in which the transparent electrodes 11a 12a and the bus electrodes 11b and 12b are stacked, but also the buses without the transparent electrodes 11a and 12a. Only the electrodes 11b and 12b may be configured. This structure does not use the transparent electrodes (11a, 12a), there is an advantage that can lower the cost of manufacturing the panel. The bus electrodes 11b and 12b used in this structure may be various materials such as photosensitive materials in addition to the materials listed above.

Light between the scan electrodes 11 and the sustain electrodes 12 between the transparent electrodes 11a and 12a and the bus electrodes 11b and 11c to absorb external light generated outside the upper substrate 10 to reduce reflection. A black matrix (BM, 15) is arranged that functions to block and to improve the purity and contrast of the upper substrate 10.

The black matrix 15 according to the exemplary embodiment of the present invention is formed on the upper substrate 10, the first black matrix 15 and the transparent electrodes 11a and 12a formed at positions overlapping the partition wall 21. And the second black matrices 11c and 12c formed between the bus electrodes 11b and 12b. Here, the first black matrix 15 and the second black matrices 11c and 12c, also referred to as black layers or black electrode layers, may be simultaneously formed and physically connected in the formation process, or may not be simultaneously formed to be physically connected. All.

In addition, when physically connected and formed, the first black matrix 15 and the second black matrix 11c and 12c may be formed of the same material, but may be formed of different materials when they are formed separately.

The upper dielectric layer 13 and the passivation layer 14 are stacked on the upper substrate 10 having the scan electrode 11 and the sustain electrode 12 side by side. Charged particles generated by the discharge are accumulated in the upper dielectric layer 13, and the protective electrode pairs 11 and 12 may be protected. The protective film 14 protects the upper dielectric layer 13 from sputtering of charged particles generated during gas discharge, and increases emission efficiency of secondary electrons.

In addition, the address electrode 22 is formed in a direction crossing the scan electrode 11 and the sustain electrode 12. In addition, the lower dielectric layer 23 and the partition wall 21 are formed on the lower substrate 20 on which the address electrode 22 is formed.

In addition, phosphor layers are formed on the surfaces of the lower dielectric layer 23 and the partition wall 21. The partition wall 21 has a vertical partition wall 21a and a horizontal partition wall 21b formed in a closed shape, and physically distinguishes discharge cells, and prevents ultraviolet rays and visible light generated by the discharge from leaking into adjacent discharge cells.

In an embodiment of the present invention, not only the structure of the partition wall 21 illustrated in FIG. 1, but also the structure of the partition wall 21 having various shapes may be possible. For example, a channel in which a channel usable as an exhaust passage is formed in at least one of the differential partition structure, the vertical partition 21a, or the horizontal partition 21b having different heights of the vertical partition 21a and the horizontal partition 21b. A grooved partition structure having a groove formed in at least one of the type partition wall structure, the vertical partition wall 21a, or the horizontal partition wall 21b may be possible.

Here, in the case of the differential partition wall structure, the height of the horizontal partition wall 21b is more preferable, and in the case of the channel partition wall structure or the groove partition wall structure, it is preferable that a channel is formed or the groove is formed in the horizontal partition wall 21b. something to do.

Meanwhile, in one embodiment of the present invention, although the R, G and B discharge cells are shown and described as being arranged on the same line, it may be arranged in other shapes. For example, a Delta type arrangement in which R, G, and B discharge cells are arranged in a triangular shape may be possible. In addition, the shape of the discharge cell may be not only rectangular, but also various polygonal shapes such as pentagon and hexagon.

In addition, the phosphor layer is emitted by ultraviolet rays generated during gas discharge to generate visible light of any one of red (R), green (G), and blue (B). Here, an inert mixed gas such as He + Xe, Ne + Xe and He + Ne + Xe for discharging is injected into the discharge space provided between the upper / lower substrates 10 and 20 and the partition wall 21.

The discharge gas is filled from the outside of the panel through an exhaust hole formed on one side of the panel, and the exhaust hole protruding from the panel after the filling is completed is blocked by heat applied from the outside.

FIG. 2 illustrates an embodiment of an electrode arrangement of a plasma display panel, and a plurality of discharge cells constituting the plasma display panel are preferably arranged in a matrix form as shown in FIG. 2. The plurality of discharge cells are provided at the intersections of the scan electrode lines Y1 to Ym, the sustain electrode lines Z1 to Zm, and the address electrode lines X1 to Xn, respectively. The scan electrode lines Y1 to Ym may be driven sequentially or simultaneously, and the sustain electrode lines Z1 to Zm may be driven simultaneously. The address electrode lines X1 to Xn may be driven by being divided into odd-numbered lines and even-numbered lines, or sequentially driven.

Since the electrode arrangement shown in FIG. 2 is only an embodiment of the electrode arrangement of the plasma panel according to the present invention, the present invention is not limited to the electrode arrangement and driving method of the plasma display panel shown in FIG. 2. For example, a dual scan method in which two scan electrode lines among the scan electrode lines Y1 to Ym are simultaneously scanned may be possible. In addition, the address electrode lines X1 to Xn may be driven by being divided up and down in the center portion of the panel.

3 is a timing diagram illustrating an embodiment of a time division driving method by dividing a frame into a plurality of subfields. The unit frame may be divided into a predetermined number, for example, eight subfields SF1, ..., SF8 to realize time division gray scale display. Each subfield SF1, ... SF8 is divided into a reset section (not shown), an address section A1, ..., A8 and a sustain section S1, ..., S8.

Here, according to an embodiment of the present invention, the reset period may be omitted in at least one of the plurality of subfields. For example, the reset period may exist only in the first subfield or may exist only in a subfield about halfway between the first subfield and all the subfields.

In each address section A1, ..., A8, a display data signal is applied to the address electrode X, and scan pulses corresponding to each scan electrode Y are sequentially applied.

In each of the sustain periods S1, ..., S8, a sustain pulse is alternately applied to the scan electrode Y and the sustain electrode Z to form wall charges in the address periods A1, ..., A8. Sustain discharge occurs in the discharge cells.

The luminance of the plasma display panel is proportional to the number of sustain discharge pulses in the sustain discharge periods S1, ..., S8 occupied in the unit frame. When one frame forming one image is represented by eight subfields and 256 gradations, each subfield in turn has different sustains at a ratio of 1, 2, 4, 8, 16, 32, 64, and 128. The number of pulses can be assigned. In order to obtain luminance of 133 gradations, cells may be sustained by addressing the cells during the subfield 1 section, the subfield 3 section, and the subfield 8 section.

The number of sustain discharges allocated to each subfield may be variably determined according to weights of the subfields according to the APC (Automatic Power Control) step. That is, in FIG. 3, a case in which one frame is divided into eight subfields has been described as an example. However, the present invention is not limited thereto, and the number of subfields forming one frame may be variously modified according to design specifications. . For example, a plasma display panel may be driven by dividing one frame into eight or more subfields, such as 12 or 16 subfields.

The number of sustain discharges allocated to each subfield can be variously modified in consideration of gamma characteristics and panel characteristics. For example, the gray level assigned to subfield 4 may be lowered from 8 to 6, and the gray level assigned to subfield 6 may be increased from 32 to 34.

4 and 5 are views showing an embodiment of the position structure of the exhaust hole in the plasma display panel of the present invention.

Referring to FIG. 4, an exhaust hole position of the plasma display apparatus of the present invention will be described. An upper substrate 100 having a sustain electrode pair 110 formed of a scan electrode and a sustain electrode as described with reference to FIG. And a lower substrate 200 bonded to the upper substrate 200 to form a panel, and an exhaust hole 300 formed to maintain a vacuum state and to fill an inert gas for discharge. .

As shown in FIG. 5, as the sustain electrode pair 110 is developed, an integrated driving board 250 is provided to supply driving signals to implement an image of the panel. It is connected to the electrode pad portion 120 to extend only one side of the connection with the integrated drive board 250. In this case, the integrated driving board 250 realizes a scan driving board for supplying driving signals to the scan electrodes and a sustain driving board for supplying driving signals to the sustain electrodes as one driving board. Since a signal can be generated, it can be disposed on either side of the panel, and is mounted on a heat dissipation frame (not shown) that is installed on the rear of the panel. The driving signal supplied from the integrated driving board 250 to the sustain electrode pair 110 will be described in detail with reference to FIG. 6 below.

In addition, the electrode pad part 120 is provided to connect the sustain electrode pair 110 and the integrated driving board 250 to supply a driving signal generated by the integrated driving board 250. FPC (Flexible Printed) Cable (Chip), Chip On Flexible (COF), Tape Carrier Package (TCP) may be used.

As such, since the sustain electrode pair 110 extends only on one side of the panel, and the integrated driving board 250 may be located only on one side of the panel, the exhaust hole 300 is disposed on the other side of the panel. It is preferably formed in.

The exhaust hole 300 is provided to make the interior space of the panel, that is, discharge cells into a vacuum state, and inject the above-described discharge gas. When the exhaust hole 300 is formed on the upper substrate 100 on the side where the sustain electrode pair 110 is not extended, as shown in FIG. 4, during the exhaust and gas filling process through the exhaust hole 300. By preventing the contamination of the sustain electrode pair 110, it is possible to improve misdischarges that may occur in the sustain electrode pair 110 adjacent to the exhaust hole 300, and the sustain electrode pair when the PDP is driven. As heat is generated at 110, the stain of the panel may be eliminated as the exhaust hole 300 is contaminated.

Meanwhile, in the present specification, the exhaust hole 300 is formed on the upper substrate 100 by way of example, but may be formed on the lower substrate 200, and the pair of sustain electrodes 110 is not formed. Not only may be formed at both edges of the other side of the panel, but may be formed only at one edge of both edges, and at least one exhaust hole 300 of the other side of the panel is formed as well as both edges. It could be. In addition, even in the case of the plasma display device using each driving board instead of the integrated driving board 250, the sustain electrode pair 110 may extend only to one side of the panel, and in such a case, the exhaust hole 300 may be used. The silver may be formed on the other side of the panel so as not to be adjacent to the sustain electrode pair 110.

In addition, when the exhaust hole 300 is formed on the lower substrate 100, as shown in FIG. 5, the other side of the panel is not adjacent to one side of the panel where the integrated driving board 250 is located. It is preferably formed in. In such a case, it is possible to prevent staining in the exhaust hole due to heat generated when the integrated driving board 250 is driven.

On the other hand, in Figure 4 and 5 of the present specification, the exhaust hole 300 is shown in the front and its shape is shown in a circle, but is substantially connected to the exhaust hole 300 for the exhaust pipe (not shown) for vacuum and gas filling Since the tip is off, the shape may have the shape of a cylinder or a cone, and may not be a perfect circular shape in front.

FIG. 6 is a timing diagram illustrating an embodiment of driving signals for driving a plasma display panel with respect to the divided subfield.

The subfield is a wall formed by a pre-reset section and a pre-reset section for forming positive wall charges on the scan electrodes Y and negative wall charges on the sustain electrodes Z. A reset section for initializing the discharge cells of the entire screen using the charge distribution, an address section for selecting the discharge cells, and a sustain section for maintaining the discharge of the selected discharge cells.

The reset section is composed of a setup section and a setdown section. In the setup section, rising ramp waveforms (Ramp-up) are simultaneously applied to all scan electrodes to generate fine discharge in all discharge cells. Thus, wall charges are generated. In the set-down period, a falling ramp waveform (Ramp-down) falling at a positive voltage lower than the peak voltage of the rising ramp waveform (Ramp-up) is simultaneously applied to all the scan electrodes (Y), thereby eliminating discharge discharge in all the discharge cells. Generated, thereby eliminating unnecessary charges during wall charges and space charges generated by setup discharges.

In the address period, a negative scan signal scan is sequentially applied to the scan electrode, and at the same time, a positive data signal data is applied to the address electrode X. The address discharge is generated by the voltage difference between the scan signal and the data signal and the wall voltage generated during the reset period, thereby selecting the cell. Meanwhile, a signal for maintaining a sustain voltage is applied to the sustain electrode during the set down period and the address period.

In the sustain period, a sustain pulse is alternately applied to the scan electrode and the sustain electrode to generate sustain discharge in the form of surface discharge between the scan electrode and the sustain electrode.

The driving waveforms shown in FIG. 6 are examples of signals for driving the plasma display panel according to the present invention, and the present invention is not limited by the waveforms shown in FIG. 6. For example, the pre-reset period may be omitted, and the polarity and the voltage level of the driving signals shown in FIG. 6 may be changed as necessary. After the sustain discharge is completed, the erase signal for erasing the wall charge may be a sustain electrode. May be applied to. In addition, the single sustain driving may be performed by applying the sustain signal to only one of the scan electrode (Y) and the sustain (Z) electrode to generate a sustain discharge.

Although a preferred embodiment of the present invention has been described in detail above, those skilled in the art to which the present invention pertains can make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Accordingly, modifications to future embodiments of the present invention will not depart from the technology of the present invention.

According to the present invention configured as described above, by forming the position of the exhaust hole provided to fill the discharge gas in the panel so as not to be adjacent to the sustain electrode pair and the integrated drive board, the sustain electrode pair generated at the position where the exhaust hole is formed. It is possible to prevent erroneous discharge of the panel and to cause staining of the panel, thereby improving the reliability of the panel.

Claims (5)

A plasma display panel on which sustain electrode pairs are formed; An integrated drive board for generating a signal to drive the plasma display panel; And An exhaust hole provided for exhausting and discharging the gas of the panel; The sustain electrode pair extends to one side of the panel to be connected to the integrated driving board, and the exhaust hole is formed at the other side edge of the panel. The method according to claim 1, And at least one exhaust hole is formed. The method according to claim 1, And the exhaust hole is formed at an edge of the panel. The method according to claim 1, And the exhaust hole is formed in one of a front side and a rear side of the panel. The method according to claim 1, And the exhaust hole is formed only at an opposite side of one side from which the sustain electrode pair extends.

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