KR20050018390A - Plasma display panel and driving method of plasma display panel - Google Patents

Abstract

PURPOSE: A plasma display panel and a method for driving the same are provided to reduce the power consumption required for the address operation by reducing the capacitive load between the electrodes. CONSTITUTION: A plasma display panel includes a plasma panel, a controller, an address data driver(300), a sustain electrode driver and a scan electrode driver. The plasma panel is provided with a plurality of address electrodes, a plurality of scan electrodes and a plurality of sustain electrodes. The controller outputs the scan electrode driving signal, the sustain electrode driving signal and the address electrode driving signal by receiving the image signals and outputs the control signal to float at least one scan electrode except the scan electrode to perform the write operation during the address period. The address data driver applies the voltage corresponding to the address electrode driving signal to the address electrodes. The sustain electrode driver applies the voltage corresponding to the sustain electrode driving signal to the sustain electrode driver. And, the scan electrode driver floats at least one scan electrode except the scan electrode to perform the write operation during the address period by switching in response to the control signal.

Description

Plasma display panel and driving method thereof {PLASMA DISPLAY PANEL AND DRIVING METHOD OF PLASMA DISPLAY PANEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (PDP) and a driving method thereof, and more particularly, to a driving method of an address section of a plasma display panel.

Recently, flat display devices such as liquid crystal displays (LCDs), field emission displays (FEDs), and PDPs have been actively developed. Among these flat panel display devices, PDPs have advantages of higher luminance and luminous efficiency and wider viewing angles than other flat panel display devices. Therefore, the PDP is in the spotlight as a display device to replace the conventional cathode ray tube (CRT) in a large display device of 40 inches or more.

PDPs are flat display devices that display characters or images using plasma generated by gas discharge, and dozens to millions or more of pixels are arranged in a matrix according to their size. Such PDPs are classified into a direct current type (DC type) and an alternating current type (AC type) according to the shape of the driving voltage waveform applied and the structure of the discharge cell.

In the DC-type PDP, since the electrode is exposed to the discharge space as it is, the current flows in the discharge space while voltage is applied, and there is a disadvantage in that a resistance for current limitation must be made for this purpose. On the other hand, in the AC type PDP, the electrode covers the dielectric layer, so the current is limited by the formation of a natural capacitance component, and the electrode is protected from the impact of ions during discharge.

1 is a partial perspective view of an AC plasma display panel.

As shown in FIG. 1, the scan electrode 4 and the sustain electrode 5 covered with the dielectric layer 2 and the protective film 3 are arranged in parallel on the first substrate 1. A plurality of address electrodes 8 covered with the insulator layer 7 are provided on the second substrate 6. A partition 9 is formed on the insulator layer 7 between the address electrodes 8 in parallel with the address electrode 8. In addition, the phosphor 10 is formed on the surface of the insulator layer 7 and on both side surfaces of the partition wall 9. The first substrate 1 and the second substrate 6 may be arranged with the discharge space 11 therebetween so that the scan electrode 4 and the address electrode 8 and the sustain electrode 5 and the address electrode 8 are orthogonal to each other. It is arranged toward. The discharge space at the intersection of the address electrode 8 and the pair of the scanning electrode 4 and the sustain electrode 5 forms a discharge cell 12.

2 shows an electrode arrangement diagram of a plasma display panel.

As shown in Fig. 2, the PDP electrode has a matrix structure of m x n. Specifically, the address electrodes A1 to Am are arranged in the column direction, and the scan electrodes Y1 to n rows in the row direction. Yn) and sustain electrodes X1 to Xn are arranged in a zigzag. Hereinafter, the scanning electrode will be referred to as "Y electrode" and the sustain electrode as "X electrode". The discharge cell 12 shown in FIG. 2 corresponds to the discharge cell 12 shown in FIG.

According to a general driving method of the PDP, one frame is divided into a plurality of subfields, and each subfield includes a reset section, an address section, and a sustain section.

The reset section (initialization section) serves to erase the wall charge state of the previous sustain discharge and to set up the wall charge in order to stably perform the next address discharge. That is, the reset section serves to create an optimal wall charge state for the address operation in the subsequent address section.

The address section selects the cells that are turned on and the cells that are not turned on in the panel to accumulate wall charges in the cells that are turned on (addressed cells), and the sustain section performs discharge for actually displaying an image on the addressed cells. do.

In particular, referring to the address operation, the plasma display panel has a matrix structure formed by the A, Y, and X electrodes as shown in FIG. 2, so that the first address discharges are the address electrodes A1, A2, ..., Am, and It occurs only between the scan electrodes Y1. Here, the reason for the discharge is as follows.

Referring to FIG. 3, first, a low voltage is applied only to the Y1 line, and a voltage is applied to the address electrode only in the cell selected by the input image. Thus, when such an intersection is formed between the two electrodes A and Y, the discharge occurs and the intersection is established. The discharge start voltage is not formed in the cells that are not formed, the scan electrodes Y2 to Yn, and the address electrodes, and thus no discharge occurs.

The second address discharge performs the addressing operation according to the same principle as above between the address electrode and the Y2 line, and subsequently the addressing operation continues to the last Yn line.

However, when the addressing operation is performed on the first Y1 line, the address voltage application cannot be input to the address electrodes of the Y1 lines to the cells selected by the input image, and the same voltage is applied to the address electrodes of all the Y lines.

Although no address discharge is generated except for the Y1 line, as shown in FIG. 4, the capacitance between the A, Y, and X electrodes of the address electrode driver 42, the Y electrode driver 41, and the X electrode driver 43 is reduced. Since a sexual load (Cay, Cax, Cxy) is formed to charge all of these capacitive loads, unnecessary energy is wasted.

SUMMARY OF THE INVENTION The present invention provides a scan electrode (Y electrode) in which an address discharge occurs by using an energy level of a floated electrode following an energy level of another electrode when floating one electrode between two electrodes. The other scan electrodes and / or sustain electrodes except for floating are formed to form energy levels and equipotentials of the address electrodes, thereby reducing capacitive loads generated between the address electrodes, the scan electrodes, and the sustain electrodes, thereby reducing power consumption.

The plasma display panel according to one aspect of the present invention for solving the above problems,

A plasma display panel which receives externally input image data and displays data in a reset period, an address period, and a sustain period,

A plasma panel including a plurality of address electrodes and a plurality of scan electrodes and sustain electrodes paired with each other and crossing the address electrodes;

The image signal is input to generate and output a scan electrode driving signal, a sustain electrode driving signal, and an address electrode driving signal, and outputs a control signal to float one or more scan electrodes except for the scan electrode in which a write operation is performed in the address period. A control unit;

An address data driver for applying a voltage corresponding to the address electrode driving signal to the address electrode;

A sustain electrode driver for applying a voltage corresponding to the sustain electrode driving signal to the sustain electrode;

A scan electrode driver for applying a voltage corresponding to the scan electrode driving signal to the scan electrode and switching the scan electrode to float one or more scan electrodes except for the scan electrode in which the writing operation is performed in the address period by switching according to the control signal; do.

In addition, the plasma display panel according to another aspect of the present invention,

A plasma display panel which generates an input video signal into a plurality of subfields and drives each subfield into a reset section, an address section, and a sustain section according to the sustain information.

A first electrode and a second electrode;

A first space defined by the first electrode and the second electrode; And

A driving circuit for transmitting a driving signal to the first electrode and the second electrode during each reset period;

The driving circuit

At least one first electrode other than the first electrode on which the writing operation is performed is floated in the address period.

In addition, the plasma display panel according to another aspect of the present invention,

A plasma display panel which receives externally input image data and displays data in a reset period, an address period, and a sustain period,

A plasma panel including a plurality of address electrodes and a plurality of scan electrodes and sustain electrodes arranged in pairs with the address electrodes;

Receives the image signal, generates and outputs a scan electrode driving signal, a sustain electrode driving signal, and an address electrode driving signal, and floats one or more scan electrodes and sustain electrodes except for the scan electrode and the sustain electrode which perform a write operation in the address period. A control unit for outputting a control signal to cause;

An address data driver for applying a voltage corresponding to the address electrode driving signal to the address electrode;

A sustain electrode driver for applying a voltage corresponding to the sustain electrode driving signal to the sustain electrode and switching one or more sustain electrodes except for the sustain electrode in which the writing operation is performed in the address period by switching according to the control signal;

A scan electrode driver for applying a voltage corresponding to the scan electrode driving signal to the scan electrode and switching the scan electrode to float one or more scan electrodes except for the scan electrode in which the writing operation is performed in the address period by switching according to the control signal; do.

In addition, the driving method of the plasma display panel according to an aspect of the present invention,

A reset step of erasing the wall charge state of the previous sustain discharge and setting up the wall charge to stably perform the next address discharge;

An address step of selecting an on-cell and a non-on-cell from the panel to accumulate wall charges on the on-cell (addressed cell);

A sustaining step of performing a discharge for actually displaying an image on the addressed cell,

At least one first electrode other than the first electrode on which the addressing operation is performed may be floated in the address step.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification. When a part is connected to another part, this includes not only a direct connection but also a connection between other components in between.

Now, a driving apparatus and a driving method of a plasma display panel according to an embodiment of the present invention will be described in detail with reference to the drawings.

5 is a configuration diagram of a plasma display panel according to a first embodiment of the present invention.

Referring to FIG. 5, the plasma display panel according to the first embodiment of the present invention may include a plasma panel 100, a controller 200, an address electrode driver 300, and a scan electrode driver (hereinafter referred to as a “Y electrode driver”). 400 and a sustain electrode driver (hereinafter referred to as an 'X electrode driver') 500.

The plasma panel 100 includes a plurality of address electrodes A1-Am arranged in the column direction, a plurality of sustain electrodes (hereinafter referred to as 'X electrodes') (X1-Xn) and scan electrodes arranged in the row direction. (Hereinafter referred to as 'Y electrode') (Y1-Yn). The X electrodes X1-Xn are formed corresponding to the respective Y electrodes Y1-Yn, and generally have one end connected in common to each other. The plasma panel 100 includes a glass substrate (not shown) on which the X and Y electrodes X1-Xn and Y1-Yn are arranged, and a glass substrate (not shown) on which the address electrodes A1-Am are arranged. . The two glass substrates are disposed to face each other with the discharge space therebetween so that the Y electrodes Y1-Yn and the address electrodes A1-Am and the X electrodes X1-Xn and the address electrodes A1-Am are orthogonal to each other. At this time, the discharge space at the intersection of the address electrodes A1-Am and the X and Y electrodes X1-Xn and Y1-Yn forms a discharge cell.

The controller 200 receives an image signal from the outside and outputs an address driving signal, an X electrode driving signal, and a Y electrode driving signal. The controller 200 divides and drives one frame into a plurality of subfields, and each subfield includes a reset period, an addressing period, and a sustain period. In particular, the controller 200 may float one or more scan electrodes except for the scan electrode in which the write operation is performed in the address period.

The address electrode driver 300 receives an address electrode driving signal from the controller 200 and applies a display data signal for selecting a discharge cell to be displayed to each address electrode A1-Am. The X electrode driver 500 receives the X electrode driving signal from the controller 200 to apply a driving voltage to the X electrodes X1 to Xn, and the Y electrode driver 400 receives the Y electrode driving signal from the controller 200. And a driving voltage is applied to the Y electrodes Y1-Yn.

Next, the operation of the plasma display panel according to the first embodiment of the present invention having such a configuration will be described in detail.

6 shows a panel state of the plasma display panel according to the first embodiment of the present invention.

5 or 6, the controller 200 receives an external image signal, corrects gamma values according to characteristics of the plasma display panel, generates N subfields, and drives X electrodes for each subfield. A signal, a Y electrode drive control signal, and an address electrode drive signal are output.

Then, the address driver 300 receives an address electrode driving signal and applies a display data signal for selecting a discharge cell to be displayed to each address electrode A1-Am.

The X electrode driver 500 receives the X electrode driving signal to apply a driving voltage to the X electrodes X1 to Xn, and the Y electrode driving unit 400 receives the Y electrode driving signal to receive the Y electrode Y1 to Yn. Is applied to the driving voltage. Here, when generating the Y electrode driving signal, the control unit 200 outputs a control signal to the Y electrode driving unit 400 so as to float the remaining Y electrodes except for the Y electrode where the writing operation is performed in the address period. That is, when the Y1 line is scanning and writing, all the Y2, Y3, ....., Yn lines are floating, and when the Y2 line is scanning and writing, the Y1, Y3, Y4, ..... and Yn lines All are floating. In this manner, when the scan write operation is completed up to the Yn line, the address period is completed.

In the above process, only some Y electrodes may be floated as necessary.

Then, as shown in the waveform of FIG. 7, the remaining electrodes except for the Y electrode on which the writing operation is performed are floated.

Since the Y electrode is floated by such an operation, as shown in FIG. 6, the capacitive load is formed only in the cell in which the scan write operation is performed, and the capacitive load is not formed in the cell in which the non-scan write operation is performed, thereby eliminating power consumption.

The switches shown in FIG. 6 are actually included inside the Y electrode driver, and are shown externally for better understanding. However, if necessary, it may be implemented as shown in FIG.

Then, the plasma panel 100 includes a plurality of address electrodes A1-Am arranged in the column direction, a plurality of sustain electrodes (hereinafter referred to as 'X electrodes') (X1-Xn) arranged in the row direction, and The voltage signals shown in FIG. 7 are respectively input to the scan electrodes (hereinafter referred to as 'Y electrodes') Y1-Yn to display corresponding data.

In this process, the first embodiment of the present invention only floats the non-injected Y electrode, but if necessary, the non-injected X electrode and the Y electrode may be simultaneously floated, or only the X electrode may be floated. An example of simultaneously floating the and Y electrodes will be described as the second embodiment. In the above description of the operation of the first embodiment, the reset period and the sustain period are not characteristic parts of the present invention, and thus detailed descriptions thereof are omitted. In the following second embodiment, like the first embodiment, the address is a feature part of the present invention. The explanation is based on the period.

8 is a view showing a panel state of a plasma display panel according to a second embodiment of the present invention, and FIG. 9 is a waveform diagram of voltages applied to respective electrodes.

Referring to FIG. 8, the configuration of the second embodiment is similar to that of the first embodiment, except that the X electrode driver 510 also includes a switch therein, similarly to the Y electrode driver 400 for floating driving.

Since the operation of this second embodiment is almost similar to that of the first embodiment, only the operation of applying a voltage to the X electrode and the Y electrode in the address period will be described.

8 or 9, both of the X and Y electrodes in the address period are in a floating state in which no voltage is applied in the non-scan write period. That is, when the X1 and Y1 lines are being scanned, the X2, X3, ..., Xn lines and the Y2, Y3, ..... Yn lines are all in a floating state.

 When the X2 and Y2 lines are being scanned, the X1, X3, X4, ..., Xn lines and the Y1, Y2, Y3, ..... Yn lines are all in a floating state. In this manner, the address period is completed when the scan write operation is completed up to the Xn and Yn lines.

Therefore, as shown in Fig. 9, in the cell in which the non-scan write operation is performed, no capacitive load is formed, thereby eliminating power consumption.

In such a second embodiment, the X electrode may be divided into blocks to be floated in units of blocks. That is, all the lines of the X electrodes are divided into a predetermined number of blocks, and when the X electrode driving signal is applied to the X electrodes of the corresponding blocks, the X electrodes of other blocks may be floated.

In addition, only the X electrode may be floating driven, and in addition, the floating driving may be performed by various modifications.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

According to the exemplary embodiment of the present invention, the scan electrodes and sustain electrodes other than the scan electrodes and sustain electrodes in which the address discharge occurs are floated to reduce the capacitive load between the electrodes, thereby reducing the power consumption required for the address operation.

1 is a partial perspective view of an AC plasma display panel.

2 shows an electrode arrangement diagram of a plasma display panel.

3 is a view showing waveforms of driving signals applied to respective electrodes of the plasma display panel.

4 is a view showing a state of a conventional plasma panel.

5 is a configuration diagram of a plasma display panel according to a first embodiment of the present invention.

6 is a view showing a state of the plasma display panel according to the first embodiment of the present invention.

7 is a diagram showing waveforms of driving signals applied to the plasma panel according to the first embodiment of the present invention.

8 is a diagram showing a state of the plasma display panel according to the second embodiment of the present invention.

9 is a view showing waveforms of driving signals applied to the plasma panel according to the second embodiment of the present invention.

Claims (15)

A plasma display panel which receives externally input image data and displays data in a reset period, an address period, and a sustain period, A plasma panel including a plurality of address electrodes and a plurality of scan electrodes and sustain electrodes paired with each other and crossing the address electrodes; The image signal is input to generate and output a scan electrode driving signal, a sustain electrode driving signal, and an address electrode driving signal, and output a control signal to float one or more scan electrodes except for the scan electrode in which a write operation is performed in the address period. A control unit; An address data driver for applying a voltage corresponding to the address electrode driving signal to the address electrode; A sustain electrode driver configured to apply a voltage corresponding to the sustain electrode driving signal to the sustain electrode; A scan electrode driver configured to apply a voltage corresponding to the scan electrode driving signal to the scan electrode and to switch one or more scan electrodes except for the scan electrode in which the writing operation is performed in the address period by switching according to the control signal; Plasma display panel. The method of claim 1, And the scan electrode driver floats all scan electrodes except for the scan electrode for which a write operation is performed in the address period. The method of claim 1, And the scan electrode driver includes a switch for switching with each scan electrode in order to float all the scan electrodes except for the scan electrode in which the write operation is performed in the address period. A plasma display panel which generates an input video signal into a plurality of subfields and drives each subfield into a reset section, an address section, and a sustain section according to the sustain information. A first electrode and a second electrode; A first space defined by the first electrode and the second electrode; And A driving circuit for transmitting a driving signal to the first electrode and the second electrode during each address period; The driving circuit And at least one first electrode other than the first electrode where a writing operation is performed in the address period. The method of claim 4, wherein Wherein the first electrode is a scan electrode and the second electrode is a sustain electrode. The method of claim 4, wherein And a first electrode is a sustain electrode, and the second electrode is a scan electrode. The method of claim 4, wherein The driving circuit And at least one first electrode and second electrode except for the first electrode and the second electrode where the writing operation is performed in the address period. A plasma display panel which receives externally input image data and displays data in a reset period, an address period, and a sustain period, A plasma panel including a plurality of address electrodes and a plurality of scan electrodes and sustain electrodes arranged in pairs with the address electrodes; Receives the image signal, generates and outputs a scan electrode driving signal, a sustain electrode driving signal, and an address electrode driving signal, and floats one or more scan electrodes and sustain electrodes except for the scan electrode and the sustain electrode which perform a write operation in the address period. A control unit for outputting a control signal; An address data driver for applying a voltage corresponding to the address electrode driving signal to the address electrode; A sustain electrode driver for applying a voltage corresponding to the sustain electrode driving signal to the sustain electrode and floating one or more sustain electrodes except for the sustain electrode in which the writing operation is performed in the address period by switching according to the control signal; A scan electrode driver configured to apply a voltage corresponding to the scan electrode driving signal to the scan electrode and to switch one or more scan electrodes except for the scan electrode in which the writing operation is performed in the address period by switching according to the control signal; Plasma display panel. The method of claim 8, And the scan electrode driver and the sustain electrode driver float all the scan electrodes and the sustain electrodes except for the scan electrode and the sustain electrode which perform the write operation in the address period. The method of claim 9, The scan electrode driver and the sustain electrode driver may include a switch for switching with each scan electrode and the sustain electrode in order to float all the scan electrodes and the sustain electrodes except the scan electrode and the sustain electrode in which the address operation is performed in the address period. A plasma display panel characterized by the above-mentioned. The method of claim 8, And dividing the sustain electrode into a predetermined number of blocks, and wherein the sustain scan electrode driver floats the sustain electrodes of all blocks except for a block including the sustain electrode where a write operation is performed in the address period. A reset step of erasing the wall charge state of the previous sustain discharge and setting up the wall charge to stably perform the next address discharge; An address step of selecting an on-cell and a non-on-cell from the panel to accumulate wall charges on the on-cell (addressed cell); A sustaining step of performing a discharge for actually displaying an image on the addressed cell, And driving at least one first electrode other than the first electrode on which the addressing operation is performed in the address step. The method of claim 12, And the first electrode is a scan electrode. The method of claim 12, And the first electrode is a sustain electrode. The method of claim 12, At least one first electrode and a second electrode other than the first electrode and the second electrode in which the address operation is performed in the addressing step are floated, the first electrode is a scan electrode, and the second electrode is a sustain electrode. A method of driving a plasma display panel.