KR200151760Y1 - Apparatus for expanding video signals in plasma display panel - Google Patents

Abstract

The present invention relates to an image expansion device of a PDP TV, wherein analog image data is converted into digital image data through an AD converter based on a sampling clock from a clock generator and then provided to a line memory and a selection unit, respectively. Based on the selection clock from the clock generator, the image data from the AD converter and the image data stored in the line memory are selectively provided to the image processor, and the next signal is rearranged into image data having the same weight through the image processor. By being processed and displayed on the screen of the PDP TV, the image data of the corresponding area can be extended to the frame image data and displayed on the screen of the PDP TV by using the line memory, so that the image data of the divided region can be easily expanded. It would be.

Description

PDP TV's video expansion device

1 is a schematic block diagram of an apparatus for expanding an image of a PDP TV according to a preferred embodiment of the present invention.

2 is a view for explaining an operation of enlarging a selected video signal as an example according to the present invention.

* Explanation of symbols for main parts of the drawings

105: clock generator 110: AD converter

120: line memory 130: selection unit

140: image processing unit

The present invention relates to a plasma display panel (PDP) TV, and more particularly, to an image expansion device of a PDP TV suitable for expanding an image signal input to a PDP TV.

Among various display devices that are applied to various fields, cathode ray tubes (hereinafter referred to as CRTs), which are capable of providing clear guidance and colorization, are simple to operate, and have low manufacturing costs, are used in many fields. Since the CRT itself has a Frasco type structure, the CRT is large in size, requires a high operating voltage of approximately 10,000V, and has a big disadvantage of display distortion.

Therefore, there is a strong demand for the emergence of a display device that can replace the CRT, and research on a so-called flat display device having a large display area and a small volume has been continuously conducted in many fields related thereto.

Such flat display devices include active devices such as electro luminescence, light emitting diodes, and PDPs, liquid crystal displays, and electro chromic guides. There is a passive element such as the present invention, and the present invention relates to a TV using a PDP which is substantially one of the active elements.

For reference, the advantages of the above-described PDP TVs include a memory capable of sustaining discharge when the input pulse is input once, and the display points are defined by the matrix structure, so that there is no distortion of the image and the emission frequency is 50 to 100 kHz. Because it is high, there is no flicker. In addition, since the PDP is a planar structure, the volume of the space can be miniaturized, and since the material which reduces the extinguishment by discharge is used on the surface of the dielectric layer in contact with the discharge, the life is long and the panel structure mainly composed of the glass plate is semi-fixed information. There is a point that can be superimposed on the slide which projects the as a slide, which is advantageous for simplicity.

On the other hand, the technique of extending the image data of the selected region among the plurality of divided frame image data to the frame image data to display on the screen of the PDP TV has been continuously studied in various fields related to this technical field.

On the other hand, an object of the present invention is to provide an image expansion device of a PDP TV that can expand the image data of the selected area using a line memory and then display it on the screen of the PDP TV.

In order to achieve the above object, the present invention provides a device for displaying a video of a PDP TV by expanding image data divided into N regions into frame image data, wherein the selected region is selected from among the image data divided into N regions. A sampling clock corresponding to the horizontal line image data is generated to extend the frame image data, and the horizontal line image data of the corresponding region is repeated to extend the vertical section of the selected region to the vertical section of the frame image data. Clock generation means for generating a selection clock for display, AD conversion means for converting an analog video signal input based on a sampling clock from the clock generation means into digital video data, and digitally through the AD conversion means. The number of the corresponding area in the converted video data Line memory for storing line image data, selection means for selectively switching image data from the clock generation means and image data from the line memory, and image data provided through the selection means have the same weight. The present invention provides a video expansion device for a PDP TV, comprising: image processing means for rearranging the image data having the same and then performing signal processing to display the PDP TV screen.

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically illustrating an image expansion apparatus of a PDP TV according to a preferred embodiment of the present invention. As can be seen from the drawing, the image expansion apparatus according to the present invention includes a clock generator 105 and an AD. (Analog to Digital; hereinafter abbreviated as AD) It is composed of a converter 110, a line memory 120, a selector 130 and an image processor 140.

In the drawing, the clock generator 105 generates a sampling clock for extending the horizontal video signal of the corresponding area based on an external operation signal, and selectively provides the image data to the image processor 140 to be described later. Generates a pulse for the selector 130.

The AD converter 110 converts the analog video signal input based on the sampling clock from the clock generator 105 into digital video data, and the line memory 120 uses the AD converter 110 to perform digital conversion. Image data corresponding to one line is stored among the converted image data.

In addition, the selector 130 may convert the image data provided from the AD converter 110 and the image data provided from the line memory 120 based on a clock for selection from the clock generator 105. 140, and the image processor 140 rearranges the image data provided through the selector 130 into image data having the same weight to display the PDP TV screen, and then signal-processes the PDP TV. Display.

An operation process of the image expansion device of the PDP TV according to the present invention, which is composed of the above-described members, will be described in more detail with reference to FIGS. 1 and 2.

First, a sampling clock for converting an analog image signal provided from a tuner (not shown) into a digital signal is generated from the clock generator 105 and provided to the AD converter 110, and the sampling clock from the clock generator 105 is provided. The analog video signal input based on the digital signal is converted into digital through the AD converter 110 and then provided to the selector 130 in units of horizontal lines.

At this time, the image data of the horizontal line unit digitally converted by the AD converter 110 is stored in the line memory 120 and then provided to the selection unit 130.

Then, the image data provided from the AD converter 110 and the image data stored in the line memory 120 are selectively provided to the image processor 140 based on the selection clock from the clock generator 105. The image processing unit 140 rearranges the image data having the same weight through the image processing unit 140, and then processes the signal to display the PDP TV screen.

For example, as shown in FIG. 2, assuming that image data of one screen is divided into four blocks A, B, C, and D, the horizontal image signal is received from the clock generator 105. FIG. A sampling clock Cs for double sampling is provided to the AD converter 110, and the analog video signal provided from the tuner is converted into digital video data based on the sampling clock Cs from the clock generator 105. And then provided to the line memory 120 and the selector 130.

Then, the image data converted into digital through the AD converter 110 based on the selection clock from the clock generator 105 is selected by the selector 130 and then provided to the image processor 140 and the image. The processor 140 is rearranged into image data having the same weight and then signal processed to be displayed on the PDP TV screen as the first horizontal line image data.

Next, the horizontal line image data provided from the line memory 120 based on the selection clock from the clock generator 105 is selected by the selection unit 130 and provided to the image processing unit 140. 140 is rearranged into image data having the same weight, and then signal processed and displayed on the screen of the PDP TV as the second horizontal line image data.

The horizontal line image data in the A region is converted into digital image data based on the sampling clock of 1 times by repeating the above-described operation process, and is then processed by the image processor 140 to process odd-numbered horizontal line image data. In this case, the same horizontal line image data stored in the line memory 120 is signal-processed by the image processor 140 and displayed on the PDP TV screen as an even-numbered horizontal line image data.

As described above, the analog image data is converted into the digital image data through the AD converter 110 based on the sampling clock from the clock generator 105, and then the line memory 120 and the selector 130 are converted into digital image data. The image data from the AD converter 110 and the image data stored in the line memory 120 are selectively provided to the image processor 140 based on a selection clock from the clock generator 105. The processor 140 is rearranged into image data having the same weight and then signal processed to be displayed on the screen of the PDP TV.

Therefore, using the present invention, since the image data of the corresponding region can be extended to the frame image data using the line memory 120 and displayed on the screen of the PDP TV, the image data of the divided region can be more easily expanded. It can be effective.

Claims (1)

An apparatus for displaying image data divided into N areas into frame image data and displaying the same on a PDP TV screen, wherein the horizontal line image data of a corresponding area selected from the image data divided into N areas is extended to frame image data. A clock for generating a corresponding sampling clock for generating a corresponding sampling clock for repetitively displaying horizontal line image data of the corresponding region to extend the vertical section of the selected region to the vertical region of the frame image data. Generating means 105; AD conversion means (110) for converting an analog video signal input on the basis of a sampling clock from said clock generating means (105) into digital video data; A line memory 120 for storing horizontal line image data of the corresponding region among image data converted into digital data by the AD converting means 110; Selection means (130) for selectively switching the image data from the AD conversion means (110) and the image data from the line memory (120) based on the selection clock from the clock generating means (105); PDP TV comprising the image processing means 140 for rearranging the image data provided through the selection means 130 to the image data having the same weight and then signal-processing and displaying the image on the PDP TV screen. Video expansion device.