KR100747293B1 - Plasma Display Panel - Google Patents

Abstract

The present invention relates to a plasma display panel, and more particularly, to an electrode structure of a plasma display panel.

The plasma display panel for achieving the object of the present invention comprises a front panel formed by forming a plurality of pairs of the scan electrode and the ground electrode, and a rear panel formed with a partition wall partitioning the discharge cells in a predetermined shape, the ground An electrode is formed inside the discharge cell.

Description

Plasma Display Panel

1 is a perspective view showing the structure of a conventional plasma display panel.

2 is a plan view showing an electrode structure of a conventional plasma display panel.

3 is a diagram illustrating a rear structure of a conventional plasma display panel module.

4 is a plan view showing the electrode structure of the plasma display panel according to the present invention.

5 is a plan view showing only the ground electrode as a transparent electrode in the electrode structure of the plasma display panel according to the present invention.

6 is a plan view showing the width of the scan electrode and the ground electrode in the electrode structure of the plasma display panel according to the present invention.

7A to 7G are exemplary views for showing various shapes of an electrode structure according to the present invention.

8 illustrates a rear structure of the plasma display panel module according to the present invention;

Fig. 9 is a drive waveform diagram of a plasma display panel in which the ground electrode in the present invention is applied with ground and driven using the address electrode and the scan electrode.

*** Explanation of symbols for main parts of drawing ***

410: scan electrode 420: ground electrode

430: address electrode

The present invention relates to a plasma display device, and more particularly to an electrode structure of the plasma display device.

In general, a plasma display panel (Plasma Display Panel) is a partition formed between the front panel and the rear panel to form a unit cell, each cell in the Neon (Ne), helium (He) or a mixture of neon and helium ( The main discharge gas such as Ne + He) and an inert gas containing a small amount of xenon are filled. When discharged by a high frequency voltage, the inert gas emits vacuum ultraviolet rays to emit phosphors formed between the partition walls, thereby realizing an image.

1 is a perspective view showing the structure of a conventional plasma display panel.

As illustrated in FIG. 1, a plasma display panel includes a front panel in which a plurality of sustain electrode pairs formed by pairing a scan electrode 102 and a sustain electrode 103 are arranged on a front substrate 101, which is a display surface on which an image is displayed. 100 and the rear panel 110 on which the plurality of address electrodes 113 are arranged so as to intersect the plurality of storage electrode pairs described above on the rear substrate 111 forming the rear surface are coupled in parallel with a predetermined distance therebetween.

The front panel 100 is made of a scan electrode 102 and a sustain electrode 103, that is, a transparent electrode (a) formed of a transparent transparent electrode material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 102 and the sustain electrode 103 provided as the bus electrode b are included in pairs. The scan electrode 102 and the sustain electrode 103 are covered by one or more upper dielectric layers 104 that limit the discharge current and insulate the electrode pairs, and facilitate discharge conditions on top of the upper dielectric layer 104. In order to do this, a protective layer 105 on which magnesium oxide (MgO) is deposited is formed.

The rear panel 110 is arranged in such a manner that a plurality of discharge spaces, that is, barrier ribs 112 of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 113 are arranged in parallel with the partition wall 112 to perform address discharge so that the inert gas in the discharge cell generates vacuum ultraviolet rays. On the upper side of the rear panel 110, red (R), green (G), and blue (B) phosphors 114 which emit visible light for image display during sustain discharge are coated. A lower dielectric layer 115 is formed between the address electrode 113 and the phosphor 114 to protect the address electrode 113.

An electrode structure of a conventional plasma display panel configured as described above is illustrated in FIG. 2.

2 is a plan view showing an electrode structure of a conventional plasma display panel.

As shown in FIG. 2, the electrode of the plasma display panel includes a scan electrode 102 and a sustain electrode 103 formed of a transparent electrode a and a bus electrode b arranged in a stripe on the front panel. The address electrode 113 is formed on the rear panel in a direction crossing the transparent electrode a and the bus electrode b.

The plurality of address electrodes 113 are arranged in parallel with the partition wall 112.

By the way, in the electrode structure of the conventional plasma display panel, although the area of the transparent electrode where the discharge occurs is constant, the transparent electrode is used to the transparent electrode area where the discharge does not occur. As a result, not only unnecessary reactive power is generated but also a transparent electrode exists outside the discharge cell, thereby increasing the manufacturing cost.

On the other hand, the plasma display panel having such an electrode structure is provided with a plurality of driving parts on the back to supply a predetermined pulse to each electrode to implement a screen, a conventional plasma display device as shown in FIG.

3 is a diagram illustrating a rear structure of a conventional plasma display panel module.

As shown in FIG. 3, the conventional plasma display apparatus includes a plasma display panel 300 for displaying an image, a heat sink 325 provided on a rear surface of the plasma display panel 300, and a scan provided on a rear surface of the heat sink 325. And a sustain driver 330, a common sustain driver 345, a data driver 350, a control board 355, and the like.

As described above, the plasma display panel 300 is bonded to the front substrate and the rear substrate at a predetermined interval.

The heat dissipation plate 325 is installed to overlap the rear surface of the plasma display panel 300 and serves to emit heat generated from the plasma display panel 300.

The scan and sustain driver 330 includes a scan driver 335 that generates a reset pulse and a scan pulse, and a sustain driver 340 that generates a sustain pulse. The scan driver 335 includes a scan electrode conductive path 360. The reset pulse and the scan pulse are supplied to the scan electrodes Y1 to Yn of the plasma display panel 300 via. The sustain driver 340 supplies a sustain pulse to the scan electrodes Y1 to Yn of the plasma display panel 300 via the scan electrode conductive path 360.

The common sustain driver 345 generates a sustain pulse and supplies the sustain pulse to the common sustain electrodes Z of the plasma display panel 100 through the sustain electrode conductive path 365.

The data driver 350 generates a data pulse and supplies the data pulse to the address electrodes X1 to Xm via the address electrode conductive path 370.

The control board 355 generates a timing signal for controlling each of the scan and sustain driver, the common sustain driver, and the data driver.

On the other hand, the conventional plasma display device has a disadvantage in that the circuit configuration is complicated and the manufacturing cost increases as the scan and sustain driver and the common sustain driver are separately provided based on the longitudinal center of the plasma display panel.

In addition, the scan and sustain driver and the common sustain driver each have source capacitors for supplying a signal, particularly a sustain pulse, to each electrode. do.

Accordingly, there is a problem in that the sustain discharge is uneven because the driving pulse is not stably supplied to the scan electrode and the sustain electrode, and interference or electromagnetic interference (EMI) is caused by the phase difference between the driving pulse applied to the scan electrode and the sustain electrode. There was a problem in that the reliability of the plasma display panel is generated.

An object of the present invention is to provide a plasma display apparatus which can reduce reactive power by improving the electrode structure of a conventional plasma display panel.

Another object of the present invention is to provide a plasma display apparatus which can improve the efficiency of discharge by improving the electrode structure of the plasma display panel.

In addition, the present invention is to provide a plasma display device that can improve the efficiency of the driving unit of the plasma display panel and can reduce the manufacturing cost.

In order to achieve the object of the present invention, a plasma display panel includes a front panel formed by forming a plurality of pairs of scan electrodes and ground electrodes located inside the discharge cell, and a rear panel having partitions partitioning the discharge cells into a predetermined shape. Characterized by including.

In addition, the ground electrode located inside the discharge cell is characterized by consisting only of a transparent electrode.

In addition, the widths of the scan electrode and the ground electrode are different from each other, and the width of the ground electrode is smaller than the width of the scan electrode.

In addition, at least one of the scan electrode and the ground electrode is characterized in that formed in each of the discharge cells in a predetermined pattern.

In addition, the shape of the pattern is characterized by forming any one of a rectangle, a circle, a triangle or a rhombus.

In addition, one end of the ground electrode is characterized in that it is connected to a predetermined ground.

In addition, the predetermined ground portion is to be a frame for supporting the rear panel is characterized in that the ends are connected in common.

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

4 is a plan view showing the electrode structure of the plasma display panel according to the present invention.

4 illustrates a plasma display panel according to an exemplary embodiment of the present invention, in which a scan electrode 410 and a ground electrode 420 are formed on a front panel, and a scan panel 420 and a ground electrode 420 are formed on a rear panel. Address electrode 430 is included.

The transparent electrode (a) and the bus electrode (b) are formed by being arranged in a stripe on the front panel, the address electrode 430 is a rear panel (not shown) in the direction crossing the transparent electrode (a) and the bus electrode (b) Is formed.

Here, a pair of two transparent electrodes (a) and two bus electrodes (b) on the front panel contacting the transparent electrode and the bus electrode with each other is called a scan electrode 410 and the other pair is called a ground electrode 420. The ground electrode 420 is positioned in the discharge cell formed on the rear panel and partitioned into a predetermined shape.

As such, when the ground electrode is positioned inside the discharge cell, the ground electrode outside the cell, which has not been used conventionally, is removed to reduce the displacement current flowing when the discharge is not performed.

Here, the ground electrode according to an embodiment of the present invention is a modification of the conventional sustain electrode. This is because, unlike a conventional sustain electrode, a sustain pulse is applied, the embodiment of the present invention is grounded to the ground level so that the ground is always maintained (hereinafter referred to as ground electrode). As such, one embodiment of the present invention applies an integrated board and a corresponding driving waveform to use the ground electrode. A more detailed description thereof will be described later with reference to FIGS. 8 and 9.

5 is a plan view showing the ground electrode as a transparent electrode only in the electrode structure of the plasma display panel according to the present invention.

5 illustrates an electrode structure in which a ground electrode is positioned in a partition wall which partitions a discharge cell into a predetermined shape according to an embodiment of the present invention.

Since the signal driven by the conventional sustain electrode is grounded, it is possible to maintain a constant waveform or send a simple signal that has been complicatedly sent through the ground electrode. As a result, the transparent electrode a alone is sufficient to provide a conventional function.

FIG. 6 is a plan view illustrating the widths of the scan electrodes and the ground electrodes in the electrode structure of the plasma display panel according to the present invention.

6 illustrates that the widths of the scan electrode 610 and the ground electrode are different from each other, and the width of the ground electrode is smaller than the width of the scan electrode 610. The ground electrode maintains a predetermined range of distances within the discharge cell for smooth surface discharge with the scan electrode 610. In order to maintain the distance of the discharge range, as the width of the ground electrode becomes smaller, the width of the scan electrode becomes larger. It is preferable that the width of the ground electrode is narrower than the width of the scan pole.

7A to 7G are exemplary views for showing various shapes of the electrode structure according to the present invention.

As shown in Figure 7a to 7g the electrode structure according to the invention has a variety of shapes, such as square, circle, triangle or rhombus. As such, various shapes of the electrode structure according to the present invention are illustrated, but are not limited thereto.

In addition, according to an embodiment of the present invention, the ground electrodes positioned in the partition wall which partitions the discharge cells into a predetermined shape are connected to neighboring ground electrodes.

Such, one end of the ground electrode according to an embodiment of the present invention are each or common connection is connected to a predetermined ground.

This predetermined ground part is assumed to be a frame supporting the rear panel.

Since the driving is performed using the scan electrode and the address electrode, the ground electrode is treated as the ground in the non-light emitting area to have a simple structure.

In the plasma display device having such a structure, a plurality of discharge cells are formed in a matrix structure, and a driving unit including a driving circuit for supplying a predetermined pulse to the discharge cells is attached and driven.

8 illustrates a rear structure of the plasma display panel module according to the present invention.

8 is a plasma display panel 800 for displaying an image according to an exemplary embodiment of the present invention, a heat dissipation plate 825 provided on a rear surface of the plasma display panel 800, and a scan and sustain driver installed on the rear surface of the heat dissipation plate 825. 830, a data driver 835, a control board 840, and the like.

As described above, the plasma display panel 800 is bonded to the front panel 810 and the rear panel 820 at predetermined intervals.

The heat dissipation plate 825 is installed to overlap the rear surface of the plasma display panel 800 so as to discharge heat generated from the plasma display panel 800.

The scan and sustain integration driver 830 is configured to integrate a scan driver for generating reset pulses and scan pulses, a sustain driver for generating sustain pulses, and a common sustain driver.

The scan and sustain integrated driver supplies a reset pulse, a scan pulse, a sustain pulse, a ground pulse, and the like to the scan electrodes and the ground electrodes of the plasma display panel 800 through the integrated conductive path.

The data driver 835 generates a data pulse and supplies the data pulse to the address electrodes X1 to Xm via the address electrode conductive path 855.

The control board 840 generates a timing signal for controlling each of the scan and sustain integrated driver and the data driver.

The control board 840 supplies the scan timing control signal and the sustain timing control signal to the scan and sustain integrated driver 830 via the first conductive path 860 and the data via the third conductive path 865. The timing control signal is supplied to the data driver 835.

As described above, the plasma display apparatus of the present invention integrates a scan and sustain driver and a common sustain driver of the plasma display panel to simplify the circuit configuration.

FIG. 9 is a driving waveform diagram of a plasma display panel in which a ground electrode is applied with ground, and driving is performed using an address electrode and a scan electrode.

FIG. 9 shows each subfield constituting a discharge cell in the reset period RP for initializing the discharge cell, the address period AP for selecting the discharge cell, and the discharge of the selected discharge cell. It is divided by the sustain period SP for maintaining.

In the reset period RP, the setup waveform of the positive voltage level is applied to the scan electrodes in the setup period SU. At the same time, the positive (+) bias voltage of the address electrode is applied. The setup waveform of the positive (+) voltage level causes a slight discharge (setup discharge) in the cells of the full screen to generate wall charges in the cells. In the set-down period SD, the setup waveform of the voltage level drops from the peak voltage to the negative scan voltage and applies the falling ramp waveform to all the scan electrodes at the same time. This falling ramp waveform causes a slight erase discharge in the cells, thereby eliminating unnecessary charges of wall charges and space charges generated by the setup discharges. Thus, the wall charges necessary for the address discharge remain uniformly inside the cells of the full screen.

In the address period AP, negative scan pulses are sequentially applied to the scan electrodes, and at the same time, positive data pulses are applied to the address electrodes. The voltage difference between the scan pulse and the data pulse, the wall voltage generated during the setdown period SD, and the data pulse are applied to generate an address discharge in the cell. This, address discharge creates wall charges inside the cells.

Meanwhile, the sustain voltage of the ground is applied to the ground electrodes during the set down period SD.

In the sustain period SP, a sustain pulse is applied using both positive and negative polarities between the scan electrodes at the same time. Then, in the cell selected by the address discharge, as the wall voltage and the sustain pulse in the cell are added, a sustain discharge occurs in the form of surface discharge between the scan electrode and the ground electrode every time the sustain pulse is applied. Here, the sustain pulses have the same voltage value as the sustain voltage.

The scan and sustain integrated driver stably supplies the driving pulses to the scan electrode and the ground electrode so that the sustain discharge is uniform, and the scan voltage is strongly variable even in the weak part of the address discharge, thereby smoothly controlling the discharge.

In the above, the AC plasma display panel according to the present invention has been described with reference to the most preferred embodiment, but this is only illustrative of the best embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below.

As described above in detail, the plasma display apparatus using the scan and sustain integrated driver has an effect of solving problems such as poor discharge and low gray level discharging.

In addition, there is an effect of reducing the displacement current flowing when the discharge is not performed, reducing the reactive power by improving the discharge efficiency by positioning the ground electrode inside the partition wall which partitions the discharge cells into a predetermined shape.

In addition, a simple structure is easy by connecting and grounding the ground electrodes in a non-light emitting area, and an unnecessary expensive transparent electrode is removed by improving the shape of the transparent electrode, thereby reducing the manufacturing cost of the plasma display panel.

Claims (9)

A front panel formed of a plurality of pairs of scan electrodes and ground electrodes positioned in the discharge cells; And Rear panel formed with partition walls for partitioning discharge cells into a predetermined shape Plasma display panel comprising a. The method of claim 1, And the ground electrode positioned inside the discharge cell is formed of only a transparent electrode. The method of claim 1, And a width of the scan electrode and a width of the ground electrode are different from each other. The method of claim 3, wherein The width of the ground electrode is narrower than the width of the scan electrode plasma display panel. The method of claim 1, At least one of the scan electrode and the ground electrode is formed in each of the discharge cells in a predetermined pattern. The method of claim 5, The shape of the pattern is a plasma display panel, characterized in that the shape of any one of a rectangle, a circle, a triangle or a rhombus. The method according to any one of claims 1 to 6, And one end of the ground electrode is connected to a predetermined ground portion. The method of claim 7, wherein And the predetermined ground portion is a frame supporting the rear panel. The method of claim 7, wherein And the ends are connected in common.

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