Plasma display panel driving method and apparatus

A technology of plasma display panel and driving method, which is applied in static indicators, image enhancement, instruments, etc., and can solve problems such as image noise and screen quality deterioration

Inactive Publication Date: 2004-09-08
LG ELECTRONICS INC
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Problems solved by technology

[0025] However, since the traditional error diffusion method uses coefficient values ​​assigned by specific weighting values, namely 7 / 16, 1 / 16, 5 / 16 and 3 / 16, to diffuse the error, image noise is generated
In other words, image noise occurs because error diffusion is performed using fixed coefficient values ​​so that error diffusion has a repetitive nature
Therefore, the disadvantage of the conventional technology is that the image noise causes a significant deterioration of the screen quality

Method used

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  • Plasma display panel driving method and apparatus
  • Plasma display panel driving method and apparatus
  • Plasma display panel driving method and apparatus

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Embodiment Construction

[0042] Reference will now be made in detail to preferred embodiments of the invention by way of example illustrated in the accompanying drawings, wherever possible the same reference numerals have been used throughout the drawings for like or like parts.

[0043] Figure 6 is a schematic diagram of an error diffusion circuit with a random value generating unit according to the first embodiment of the present invention.

[0044] refer to Figure 6 , The error diffusion circuit according to the first embodiment of the present invention includes a look-up table 64 , an error diffusion unit 90 and a random value generation unit 86 .

[0045] The look-up table 64 stores therein grayscale values ​​representable by brightness weighting values ​​(for example, 1:3:6:12:19:26:34:42:51:61). The look-up table 64 outputs a specific grayscale value corresponding to the input grayscale value. The look-up table 64 is illustrated in the figure as an example. The look-up table may use any m...

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Abstract

The present invention relates to a driving method and apparatus of a plasma display panel. The driving method including the steps of: checking whether or not a first input grayscale data can be expressed through a certain pixel on the panel; in case the first grayscale data cannot be expressed, outputting a second grayscale data adjacent to the first grayscale data; and respectively multiplying erroneous data corresponding to a difference between the first grayscale data and the second grayscale data with preset coefficient values to diffuse the multiplied result to a plurality of pixels adjacent to the pixel, wherein before the erroneous data are respectively multiplied with the preset coefficient values, a random value is multiplied to at least one coefficient value among the plurality of coefficient values.

Description

technical field [0001] The present invention relates to a plasma display panel, and more particularly, to a driving method and device for a plasma display panel capable of improving screen quality. Background technique [0002] Recently, a plasma display panel (hereinafter referred to as "PDP") is gaining popularity as a slim and light display device. The PDP changes the number of times of light emission in proportion to a video signal such as that of a television signal to display images. Specifically, the video signal is digitized, and the digitized video data is divided into field periods according to the number of bits. For each sub-field period, light is emitted for a number of times proportional to the luminance weighted value of the digital video signal (such as the number of sustain pulses) to represent gray levels. [0003] For example, 8-bit video data is used to represent images with 256 gray levels, such as figure 1 As shown, the display period of one frame (eg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G09G3/20G09G3/28G09G3/296H04N1/405
CPCG09G2320/0266G09G3/2029G09G3/2803G09G3/2059G09G3/291G09G3/296
Inventor 金大铉林谨洙
Owner LG ELECTRONICS INC
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