KR100560525B1 - Plasma display device and driving method thereof - Google Patents

Abstract

The present invention relates to a plasma display device and a driving method thereof. In the present invention, if the sensor unit receives a selection signal for implementing the PIP function from the outside, and it is determined that the PIP function is turned on, the microcomputer determines that the resolution of the second image signal and adjusts the sharpness at a corresponding ratio Output the signal. Then, the scaler adjusts the sharpness of the second video signal at a ratio corresponding to the control signal of the microcomputer, and synthesizes the first and second video signals and outputs the synthesized first and second video signals. Thus, when the PIP function is used, resolution of the input video signal of the sub screen is determined, and the screen is squeezed by adjusting the sharpness of the image data so that the entire screen is uniformly scaled.

PDP, Resolution, Image Size, Scaling, PIP

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.

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

Plasma display panels, which are currently commercialized, generate a discharge in each pixel, and excite a fluorescent material coated on the inner wall of the pixel with ultraviolet rays generated by the discharge to realize a desired color.

In such a plasma display panel, scaling is performed on the image input signal to match the size of the display device. If the resolution of the input video signal is smaller than the resolution that the display device can display, up scaling is performed, and if the resolution of the input video signal is smaller, the down scaling is performed.

However, when the picture in picture (PIP) function is turned on, it is necessary to downscale a video signal having an input resolution in a small PIP picture. In this case, because a lot of data must be represented in a small area, the screen flickers on the dynamic screen due to the limitation of scaling.

An object of the present invention is to determine the resolution of the input video signal of the sub-screen when using the PIP function, and to adjust the sharpness of the image data so that the entire screen is constantly skewed to prevent the screen rumbling And a driving method thereof.

A plasma display device according to an aspect of the present invention for achieving the technical problem,

A plasma display device receiving a first video signal and a second video signal to implement a PIP function,

A sensor unit configured to receive a selection signal for implementing a PIP function from the outside and output a signal corresponding thereto;

A memory for storing a ratio of adjusting sharpness for each input resolution;

A microcomputer outputting a control signal to determine the resolution of the second image signal and to adjust the sharpness at a ratio corresponding to the piezo function when the output of the sensor unit is received;

And a scaler configured to adjust the sharpness of the second video signal at a ratio corresponding to the control signal of the microcomputer, and to synthesize the first and second video signals and output the synthesized first and second video signals.

The plasma display device,

A plasma display panel including a plurality of address electrodes, a plurality of scan electrodes, and a sustain electrode;

A controller configured to receive an image signal of the scaler to generate an address driving signal, a scan electrode driving signal, and a sustain electrode driving signal;

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

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

The sustain electrode driving unit may be configured to apply a voltage corresponding to the sustain electrode driving signal to the sustain electrode.

A plasma display device according to another aspect of the present invention for achieving the technical problem,

A plasma display device receiving a first video signal and a second video signal to implement a PIP function,

A sensor unit configured to receive a selection signal for implementing a PIP function and a signal related to a size of a sub screen from an external source, and output a signal corresponding thereto;

A memory for storing a ratio for adjusting sharpness corresponding to each input resolution and the size of the sub-screen;

A microcomputer that outputs a control signal to determine the resolution of the second image signal and the size of the sub-screen and adjust the sharpness at a ratio corresponding thereto when the piezo function is determined by receiving the output of the sensor unit;

And a scaler configured to adjust the sharpness of the second video signal at a ratio corresponding to the control signal of the microcomputer, and to synthesize the first and second video signals and output the synthesized first and second video signals.

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

A driving method of a plasma display device receiving a first image signal and a second image signal to implement a PIP function,

Receiving a selection signal for implementing the IP function from the sensor unit from the outside;

If it is determined that the PI function is turned on, the microcomputer outputs a control signal to determine the resolution of the second image signal and adjust the sharpness at a ratio corresponding thereto;

And adjusting a sharpness of the second video signal at a ratio corresponding to the control signal of the microcomputer, and synthesizing and outputting the first and second video signals.

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.

A plasma display device and a driving method thereof according to an embodiment of the present invention will now be described in detail with reference to the drawings.

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, a sustain electrode driver (hereinafter referred to as an “X electrode driver”) 500, a sensor unit 610, a scaler 620, a microcomputer 630, and a memory 640.

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. The controller 200 receives the image data and outputs an address driving signal, an X electrode driving signal, and a Y electrode driving signal. 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. The sensor unit 610 receives a selection signal for implementing the PIP function and a signal regarding the size of the sub screen from the outside, and outputs a signal corresponding thereto. The memory 640 stores a ratio for adjusting the sharpness corresponding to each input resolution and the size of the sub screen. When the microcomputer 630 receives the output of the sensor unit and determines that the PI function is turned on, the microcomputer 630 determines the resolution of the second image signal and the size of the sub screen and outputs a control signal to adjust the sharpness at a corresponding ratio. do. The scaler 620 adjusts the sharpness of the second video signal at a ratio corresponding to the control signal of the microcomputer, and synthesizes the first and second video signals and outputs the synthesized first and second video signals.

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, a user selects a PIP function using a remote controller or a selection switch (not shown) as needed. In this case, the size of the sub-screen can be changed with high precision and the size of the sub-screen can also be selected.

Then, the sensor unit 610 receives various selection signals received from an external remote controller or selection switch and transmits them to the microcomputer 630.

Then, when the microcomputer 630 receives the output signal of the sensor 610 and determines that the PI function is turned on, the microcomputer 630 determines the resolution of the second image signal and the size of the sub-screen and stores the corresponding ratio in the memory ( Reference signal 640 is read and a control signal is output to adjust the sharpness at this ratio. Here, the memory 640 stores a ratio for adjusting the sharpness corresponding to each input resolution and the size of the sub screen.

Then, the scaler 620 adjusts the sharpness of the second video signal at a ratio corresponding to the control signal of the microcomputer, and synthesizes the first and second video signals and outputs the synthesized first and second video signals. Here, the scaler 620 is a 1/4 ratio when the resolution is 1024 * 768, and a 1/2 ratio when the resolution is 640 * 480 so that the scaler 620 corrects the sharpness of the image data to 256 * 192 so that the scaling is possible. The same rules apply to the remaining resolutions. In other words, the higher the resolution, the lower the sharpness ratio.

The controller 200 gamma corrects the image signal to match the characteristics of the plasma display panel to generate the X electrode driving signal, the Y electrode driving signal, and the address electrode driving signal.

Then, the address electrode 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. In addition, 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 driver 400 receives the Y electrode driving signal to receive the Y electrode Y1. Yn) is applied a driving voltage.

Then, the sub screen and the main screen are displayed on the plasma panel 100.

In this case, when the user uses other functions of the remote controller, a detailed description thereof is omitted since it is well known in the art.

As described above, various modifications can be made to the embodiment of the present invention, and if necessary, a sharpness adjustment ratio corresponding to the resolution and the size of the sub-screen can be stored in the memory 640, and the sharpness can be adjusted accordingly to perform scaling. . In this case, when the microcomputer 630 receives the size of the sub screen through the sensor unit 610, and outputs a sharpness adjustment ratio with reference to the memory 640, the scaler 620 adjusts sharpness and scaling accordingly. Conduct. In this case, as the size of the sub-screen is smaller, the sharpness is adjusted at a higher ratio to allow smooth scaling. In addition to the embodiment of the present invention various modifications are possible.

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 configuration of the present invention, it is possible to prevent the screen rumbling by determining the resolution and size of the input video signal of the sub-screen when the PIP function is used, and adjusting the sharpness of the video data so that the entire screen is constantly scaled. .

Claims (7)

A plasma display device receiving a first video signal and a second video signal to implement a PIP function, A sensor unit configured to receive a selection signal for implementing a PIP function from the outside and output a signal corresponding thereto; A memory for storing a ratio of adjusting sharpness for each input resolution; A microcomputer outputting a control signal to determine the resolution of the second image signal and to adjust the sharpness at a ratio corresponding to the piezo function when the output of the sensor unit is received; And a scaler configured to adjust the sharpness of the second video signal at a ratio corresponding to the control signal of the microcomputer, and to synthesize the first and second video signals and output the synthesized first and second video signals. The method of claim 1, A plasma display panel including a plurality of address electrodes, a plurality of scan electrodes, and a sustain electrode; A controller configured to receive an image signal of the scaler to generate an address driving signal, a scan electrode driving signal, and a sustain electrode driving signal; An address data driver for applying a voltage corresponding to the address electrode driving signal to the address electrode; A scan electrode driver for applying a voltage corresponding to the scan electrode driving signal to the scan electrode; And a sustain electrode driver configured to apply a voltage corresponding to the sustain electrode driving signal to the sustain electrode. The method according to claim 1 or 2, The sharpness control ratio stored in the memory is lower as the resolution is higher. A plasma display device configured to receive a first image signal representing a main screen and a second image signal representing a sub screen to implement a PIP function. A sensor unit configured to receive a selection signal for implementing a PIP function and a signal related to a size of a sub screen from an external source, and output a signal corresponding thereto; A memory for storing a ratio for adjusting sharpness corresponding to each input resolution and the size of the sub-screen; A microcomputer that outputs a control signal to determine the resolution of the second image signal and the size of the sub-screen and adjust the sharpness at a ratio corresponding thereto when the piezo function is determined by receiving the output of the sensor unit; And a scaler configured to adjust the sharpness of the second video signal at a ratio corresponding to the control signal of the microcomputer, and to synthesize the first and second video signals and output the synthesized first and second video signals. The method of claim 4, wherein The sharpness control ratio stored in the memory is lower as the size of the sub screen is smaller. A driving method of a plasma display device receiving a first image signal and a second image signal to implement a PIP function, Receiving a selection signal for implementing the IP function from the sensor unit from the outside; If it is determined that the PI function is turned on, the microcomputer outputs a control signal to determine the resolution of the second image signal and adjust the sharpness at a ratio corresponding thereto; And adjusting a sharpness of the second image signal by a scaler unit at a ratio corresponding to the control signal of the microcomputer, and synthesizing and outputting the first and second image signals. The method of claim 6, The sharpness control ratio is lowered as the resolution is higher.

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