KR100427744B1 - Method for data interface of plasma display panel - Google Patents

Abstract

PURPOSE: A data interface device and a method of a PDP(Plasma Display Panel) are provided to minimize a temporary storage capacity for storing video data according to an input unit of a driver end, thereby increasing efficiency of PDP interface design and reducing a production design cost. CONSTITUTION: Video data outputted from a memory is supplied to an interface unit(40). 160-bit data of the video data is stored in the first interface unit(41). The second interface unit(42) stores next 160-bit data based on an input control signal generated through a line(L62) from a timing controller(60). The timing controller(60) generates an output control signal as soon as the input control signal is generated in the second interface unit(42), and supplies the output control signal to the first interface unit(41) through a line(L61). While the 160-bit data is inputted in the second interface unit(42), video data prestored in the first interface unit(41) is outputted to a driver end.

Description

PD data device and method {METHOD FOR DATA INTERFACE OF PLASMA DISPLAY PANEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (abbreviated as PDP), and more particularly, to temporarily display R, G, and B data of an image signal received from the outside of a PDP and then display it on a screen. The present invention relates to a data interface method of PDPD for transmitting data to a driver.

In recent years, CRT, which is the main qualification of the video display device, requires a large size and a high operating voltage. Therefore, technology development to cope with this is in progress everywhere, and it is possible to reduce the thickness and realize high quality of EL (Electro Luminescence) and LED. Active elements such as Light Emitting Diodes (PDPs), PDPs, and passive elements such as LCDs (Liquid Crystal Displays) and ECDs (Electro Chromic Displays) have been developed. The present invention relates to a display device using a PDP, which is one of the active elements.

As is well known, the PDP is a device that displays characters, graphics, or images by using the gas discharge effect. Referring to the advantages of the PDP, the PDP continuously discharges when an input pulse is input in the AC-PDP. There is a memory function, and since the display points are defined by the matrix structure, there is no distortion of the image, and there is no flicker because the emission frequency is high at 50-100 kHz.

In addition, since the PDP is a planar structure, the volume of the space can be miniaturized, and since the material which reduces the extinguishing by the 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.

Looking at the data processing process of such a PDP system, first, separates the image signal received from the outside, converts each R, G, B data into digital data, rearranges the data in a predetermined predetermined format and temporarily Will be saved.

The temporarily stored data is provided to the driver terminal through the data interface unit, and the driver terminal displays the input data on the screen by driving each electrode provided in the PDP panel.

In the conventional PD system, the interface unit is composed of two separate line memories. Each line memory alternately stores and outputs image data provided from the memory unit one line.

For example, while the data stored in the first line memory of the interface unit is output, the second line memory receives and inputs image data corresponding to the next line from the memory unit, while the data stored in the second line memory is output. The first line memory again inputs image data corresponding to the next line provided from the memory unit.

Accordingly, such a conventional PD interface unit needs a memory space capable of storing image data of at least two lines in order to alternately input / output image data corresponding to one line.

On the other hand, the driver stage is composed of 40 driver ICs that drive the 64 electrodes in the case of PDP having a screen size of 853 × 480. Each driver IC is operating in the read mode of the two line memories in the interface unit. 16 lines of 4 bits are provided from the line memory.

That is, the 4-bit image data is sequentially provided 16 times in a manner that is simultaneously provided to the corresponding driver ICs among the 40 driver ICs, so that one line of image data is loaded into the driver stage.

Therefore, in consideration of the input characteristics of the driver IC as described above, the size of each line memory included in the interface unit may be configured to a size corresponding to one input unit of the driver terminal.

Accordingly, an object of the present invention is to provide a data interface apparatus and method of a PDP capable of increasing the efficiency of hardware design by minimizing the size of the memory means provided in the interface unit in the PDP. have.

In order to achieve the above object, the present invention, in response to the control pulse generated from the timing control unit based on the vertical and horizontal synchronization signal of the input image, a plurality of R, G, B image data of each n bits stored in the frame memory In a data interface method of a PDP interface device for interfacing to a data driver stage composed of a driver IC, the data interface to the data driver stage is simultaneously provided to each of the driver ICs corresponding to each m-bit group of image data. A plurality of steps are sequentially performed in units of lines, and the interface device each has a storage capacity of the m-bit group image data, which is simultaneously provided to each of the plurality of driver ICs. Buffers that alternately perform input and output Consists Lee, there is provided a PDP of the data interface devices and methods for interfacing the respective line data of the image data stored in the memory to the data driver stage sequentially.

1 is a block diagram of a main part of a general PD system;

2 is a diagram illustrating a configuration of an interface unit suitable for applying a PDP data interface method according to an exemplary embodiment of the present invention;

3 is a view showing the operation of the interface unit by the input / output control signal in a typical PD.

<Description of the code | symbol about the principal part of drawing>

10: signal processing unit 20: A / D conversion unit

30: memory unit 40: interface unit

50: driver stage 60: timing control unit

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.

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

1 is a block diagram of a main part of a general PDP system, and includes a signal processor 10, an analog / digital (A / D) converter 20, a memory 30, an interface 40, and a driver. 50, the timing control part 60 is included.

Looking at the processing of the image data input to the PDP system with reference to the drawing, the image signal received from the outside is separated into R, G, B color signals by the signal processing unit 10 and again the A / D conversion unit 20 Are converted into digital data and stored in the memory unit 30, respectively.

Then, the digitally converted data is rearranged in a predetermined predetermined format and stored in the memory unit 30, and based on a data output clock provided from the timing controller 60 based on a synchronization signal of an input video signal. After being transmitted to the unit 40 and temporarily stored, it is displayed on the screen through the driver unit 50.

Meanwhile, the interface unit 40 described above includes a first interface unit 41 and a second interface unit 42 as shown in FIG. 2, wherein the image data provided from the memory unit 30 is a timing controller. Input and output control signals generated from 60 are alternately input and output to the first and second interface units 41 and 42 simultaneously.

In addition, the driver stage 50 of the general PDP system includes 40 driver ICs when the screen size is 480 × 853, and it controls 64 electrodes per driver IC to control the driving of each electrode. The driver IC inputs the video data output from the interface unit 40 four times by four bits on the basis of the shift clock generated from the timing controller 60.

Therefore, since the first interface unit 41 and the second interface unit 42 must simultaneously provide 4-bit image data to 40 driver ICs at the same time, at least 160 bits (4 bits x 40 pieces) of data are required. Is configured as a temporary storage means for temporary storage.

The data interface method of the PDP according to the preferred embodiment of the present invention will be described in detail with reference to the drawings.

The image data output from the memory unit 30 is provided to the interface unit 40 configured as described above, wherein the memory unit 30 is based on an input control signal generated through the line L61 from the timing controller 60. 160 bits of data of one line of image data outputted from the N-axis are stored in the first interface unit 41.

In addition, the second interface unit 42 stores 160-bit data next based on the input control signal generated from the timing controller 60 through the line L62. In this case, the timing controller 60 Generates an output control signal at the same time as when the input control signal is generated in the second interface unit 42 described above, and provides the output control signal to the first interface unit 41 through the line L61. The 160-bit video data stored in 41) is provided to 40 driver ICs in total by 4 bits.

Therefore, the image data pre-stored in the first interface unit 41 is output to the driver terminal 50 while the 160-bit image data is input to the second interface unit 42.

When the data input process of the first interface unit 41 and the data output process of the second interface unit 42 are finished, the timing controller 60 again outputs an output control signal to the second interface unit 42. By generating an input control signal to the first interface unit 41, the first interface unit 41 inputs data and the second interface unit 42 outputs data.

As a result, the first interface unit 41 and the second interface unit 42 alternately perform the input / output process as shown in FIG. 3 based on the input / output control signal generated from the timing controller 60. Will be performed.

Then, the image data output from each interface unit 40 through the above-described process is provided to the driver terminal 50 and then displayed on the screen by driving each electrode provided in the PDP panel.

As described above, according to the present invention, the PDP is minimized to fit the input unit of the driver stage 50, rather than the size of the temporary storage capacity for storing the image data in the data interface unit to store the image data for one line. It is possible to increase the efficiency of the interface unit design, thereby reducing the product design cost.

Claims (3)

It responds to the control pulse generated from the timing controller based on the vertical and horizontal synchronization signals of the input image, and interfaces the n, R, G, and B image data stored in the frame memory to a data driver stage composed of a plurality of driver ICs. As a data interface method in a PDP interface device, When the input control signal from the timing controller is applied, dividing one line image data from the frame memory into m-bit group unit image data and sequentially storing the image data in two interface units; Alternately outputting m-bit group unit image data stored in the two interface units to a data driver stage composed of the plurality of driver ICs when an output control signal from the timing controller is applied; PD data interface method comprising a. It responds to the control pulse generated from the timing controller based on the vertical and horizontal synchronization signals of the input image, and interfaces the n, R, G, and B image data stored in the frame memory to a data driver stage composed of a plurality of driver ICs. PDP interface device, The m-bit group of one line of image data from a frame memory according to an input control signal from the timing controller, having a storage capacity of m-bit group image data provided once to each of the plurality of driver ICs simultaneously A first interface unit for storing unit image data and outputting the stored m-bit image data to a data driver terminal when an output control signal from the timing controller is applied; M having a storage capacity of group unit image data of the same m-bit as the first interface unit, and located next to the data stored in the first interface unit among the image data for one line according to an input control signal from the timing controller; A second interface unit storing bit group image data and applying the m-bit image data to the data driver terminal alternately with the first interface unit when an output control signal from the timing controller is applied; PD data interface device comprising a. The method of claim 1, The first interface unit and the second interface unit, the data interface device of the PDIP, characterized in that when the number of horizontal lines of 853 pixels, each of 160 bits of data can be temporarily stored.

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