KR100599781B1 - Plasma display device and driving method thereof - Google Patents

Abstract

The present invention relates to a plasma display device and a driving method thereof. According to an exemplary embodiment of the present invention, a plasma scan panel is double-scanned, and an addressing operation is performed by scanning a first electrode corresponding to an odd number of the first electrodes in an address period, and simultaneously scanning a first electrode corresponding to an even number. . By doing so, the step difference between the top and the bottom of the plasma display panel is eliminated, and the luminance difference between the half points is also eliminated.

PDP, Dual Scan, Addressing, Impedance

Description

Plasma display device and driving method thereof {PLASMA DISPLAY DEVICE AND DRIVING METHOD THEREOF}

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

FIG. 2 is a diagram illustrating the Y electrode driver, the address electrode driver, and the electrode arrangement of FIG. 1 in detail.

3 illustrates a scan waveform of a plasma display device according to an exemplary embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, and more particularly, to a method of driving a plasma display panel of a double scan method.

Plasma display devices 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 form according to their size.

In order to achieve the performance as a color display, the plasma display device needs to implement a halftone. Currently, a halftone implementation method of dividing one TV field into a plurality of subfields and controlling the time division is used. have.

Each subfield consists of a reset period, an address period, and a sustain period. The reset period serves to erase the wall charges formed by the previous sustain discharge and to set up the wall charges in order to stably perform the next address discharge. The address period is a period in which a wall charge is accumulated in a cell (addressed cell) that is turned on by selecting a cell that is turned on and a cell that is not turned on in the panel. The sustain period is a period in which sustain discharge is performed to actually display an image in the addressed cells.

In such a plasma display device, there is a double scan method for reducing the address period among the methods for lengthening the sustain period.

In the conventional double scan method, the plasma display panel is divided into two parts up and down, sequentially addressed from the top to the half point, and sequentially addressed from the bottom to the half point.

However, such a conventional double scan method is causing problems such as a luminance difference due to an impedance between the upper and lower parts and the intermediate point, and the generation of a step difference of 1/2 point. In particular, as the size of the plasma display panel increases, the problem becomes more serious.

SUMMARY OF THE INVENTION The present invention has been made in an effort to solve the above-described problems of the related art, and to provide a plasma display device and a driving method thereof for solving a luminance difference and a step in a double scan method.

According to another aspect of the present invention, there is provided a method of driving a plasma display device.

A driving method of a plasma display device comprising a plurality of address electrodes, a first group consisting of a plurality of first electrodes, and a second group adjacent to the first electrode of the first group and at least two or more first electrodes.

A first step of scanning by addressing the first group of electrodes in an address period;

And performing the addressing by scanning the first electrode of the second group while the first step is performed.

A plasma display device according to an aspect of the present invention for solving this problem,

A plasma display panel including a plurality of address electrodes, a first scan electrode group including a plurality of scan electrodes, and a second scan electrode group adjacent to at least two scan electrodes of the first scan electrode group;

A controller configured to receive the image signal and generate and output a scan electrode driving signal and an address electrode driving signal;

A scan voltage corresponding to the scan electrode driving signal is applied to the scan electrodes of the first and second scan electrode groups. A scan electrode driver configured to apply a scan voltage to the scan electrodes of the second group while applying a scan voltage to the scan electrodes of the first group;

And an address electrode driver configured to apply a voltage corresponding to the address electrode driving signal to the address electrodes corresponding to the scan electrodes of the first and second scan electrode groups.

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.

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

Referring to FIG. 1, a plasma display device according to an exemplary embodiment of the present invention includes a plasma display 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 display panel 100 includes a plurality of address electrodes A1-Am arranged in a column direction, a plurality of sustain electrodes (hereinafter referred to as 'X electrodes') (X1-Xn) and scans arranged in a row direction. Electrodes (hereinafter referred to as 'Y electrodes') 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 display panel 100 includes a glass substrate (not shown) in which the X and Y electrodes X1-Xn and Y1-Yn are arranged, and a glass substrate (not shown) in which the address electrodes A1-Am are arranged. Is done. 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. In particular, the address electrodes of the plasma display panel 100 are formed at upper and lower portions, respectively, and the upper address electrodes cross the odd-numbered Y electrodes to form discharge cells, and the lower address electrodes cross-even the even-numbered Y electrodes. A discharge cell is formed.

 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.

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 an X electrode driving signal from the controller 200 and applies a driving voltage to the X electrodes X1 to Xn. The Y electrode driver 400 receives the Y electrode driving signal from the controller 200 and applies a driving voltage to the Y electrodes Y1-Yn.

2 is a diagram illustrating a scan electrode driver, an address electrode driver, and an electrode array according to an exemplary embodiment of the present invention.

In FIG. 2, the number of Y electrode lines is set to 10, which is shown as 10 for convenience of explanation, and more than that.

2, the Y electrode driver 400,

A first scan electrode driver 410 for scanning the odd scan electrode lines; A second scan electrode driver 420 for scanning even-numbered scan electrode lines,

The address electrode driver 500 is

A first address electrode driver 510 for supplying a corresponding voltage to the address electrode when the odd-numbered scan electrode line is scanned;

When the even-numbered scan electrode line is scanned, a second address electrode driver 520 for supplying a corresponding voltage to the address electrode is included.

The operation of the plasma display device according to the embodiment of the present invention having such a configuration will now be described in detail.

First, the controller 200 receives an externally input image signal, corrects a gamma value according to the characteristics of the plasma display panel, and generates an address electrode driving signal, an X electrode driving signal, and a Y electrode driving signal from the corrected image signal. Output

The X electrode driver 500 applies a corresponding voltage to the X electrode in response to the X electrode driving signal received from the controller 200.

In addition, the address electrode driver 300 and the Y electrode driver 400 apply a corresponding voltage to the address electrode and each Y electrode line in response to the address electrode driving signal and the Y electrode driving signal received from the controller 200. This will be described in detail with reference to FIG. 2.

Referring to FIG. 2, the first Y electrode driver 410 of the Y electrode driver 400 sequentially applies scan voltages to odd-numbered Y electrode lines. Then, the corresponding data of the first address electrode driver 310 is applied to the address electrode, and the corresponding cell where the odd-numbered Y electrode line and the address electrode intersect are currently addressed.

In addition, the second Y electrode driver 420 of the Y electrode driver 400 sequentially applies a scan voltage to the even-numbered Y electrode line. Then, the corresponding data of the second address electrode driver 320 is applied to the address electrode, and the corresponding cell where the even-numbered Y electrode line that is currently scanned and the address electrode intersect is addressed.

At this time, the order in which the entire Y electrodes are scanned is shown in FIG.

Referring to Fig. 3, the Y1 and Y2 lines are simultaneously scanned, the next Y3 and Y4 lines are scanned, and in this order, the Y9 and Y10 lines are scanned. At this time, if necessary, odd and even lines may be scanned with a slight parallax rather than simultaneous scan.

In an embodiment of the present invention, the odd-numbered and even-numbered Y electrodes may be driven in reverse order or in a different order instead of sequentially driving, respectively, as necessary. Further, some even electrodes may be included in the odd electrode group or some even electrodes may be included in the odd electrode group without dividing the scan electrodes in even and odd numbers.

After the addressing is completed by this process, when a sustain pulse is applied to the X electrode and the Y electrode in the sustain period, an image is displayed on the plasma display panel.

According to the exemplary embodiment of the present invention, since the plurality of Y electrode drivers 410 and 420 address the odd and even lines, respectively, the plasma display panel is evenly addressed, so that the luminance difference between the upper and lower portions and the half point are different. Can solve the step.

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.

As described above, according to the configuration of the present invention, the plasma display panel can determine the scan period and the address period corresponding to the APC level, thereby stably causing the sustain discharge in the plasma display panel and having the maximum peak luminance.

Claims (13)

A plasma display panel including a plurality of address electrodes, a first scan electrode group including a plurality of scan electrodes, and a second scan electrode group adjacent to at least two scan electrodes of the first scan electrode group; A controller configured to receive the image signal and generate and output a scan electrode driving signal and an address electrode driving signal; A scan voltage corresponding to the scan electrode driving signal is applied to the scan electrodes of the first and second scan electrode groups. A scan electrode driver configured to apply a scan voltage to the scan electrodes of the second group while applying a scan voltage to the scan electrodes of the first group; An address electrode driver configured to apply a voltage corresponding to the address electrode driving signal to the address electrodes corresponding to the scan electrodes of the first and second scan electrode groups; The first scan electrode group is an odd scan electrode, and the second scan electrode group is an even scan electrode, The scan electrode driver, A first scan electrode driver for scanning the scan electrodes of the first scan electrode group; A second scan electrode driver for scanning the scan electrodes of the second scan electrode group; The address electrode driver, A first address electrode driver configured to supply a corresponding voltage to the address electrode when the first group of scan electrodes is scanned; A second address electrode driver configured to supply a corresponding voltage to the address electrode when the scan electrode lines of the second group are scanned; The address electrodes of the plasma display panel are formed at upper and lower portions, respectively, and the upper address electrodes cross the odd-numbered scan electrodes to form discharge cells, and the lower address electrodes cross the even-numbered scan electrodes to form discharge cells. Plasma display device characterized in that. delete delete delete delete The method of claim 1, And the scan electrode driver sequentially drives the scan electrodes of the first group. The method of claim 6, And the scan electrode driver sequentially drives the scan electrodes of the second group. A plurality of address electrodes, a first group consisting of a plurality of first electrodes, a second group adjacent to the first electrode of the first group and at least two or more first electrodes, wherein the first electrode of the first group A driving method of a plasma display device, the method comprising: a first scan electrode driver for scanning a second electrode; and a second scan electrode driver for scanning a first electrode of the second group. A first step of scanning by addressing the first group of electrodes in an address period; A second step of performing addressing by scanning the first electrode of the second group while the first step is performed, The first group is an odd-numbered scan electrode, and the second group is an even-numbered scan electrode, The address electrodes of the plasma display panel are formed at upper and lower portions, respectively, and the upper address electrodes cross the odd-numbered scan electrodes to form discharge cells, and the lower address electrodes cross the even-numbered scan electrodes to form discharge cells. A driving method of a plasma display device, characterized in that. delete The method of claim 8, And the first step sequentially scans first electrodes corresponding to the first group. The method of claim 10, And the second step sequentially scans the first electrode corresponding to the second group. The method of claim 8, And the first step scans the first electrode corresponding to the first group in reverse order. The method of claim 12, And the second step scans the first electrode corresponding to the second group in reverse order.

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