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A Dithering Based Technique for Improving Gray Level Reproduction Capability in Dark Areas on Plasma Display Panels  

Park, Seung-Ho (Dept.of Electronics Engineering, Inha University)
Kim, Chun-U (Dept.of Electronics Engineering, Inha University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.39, no.3, 2002 , pp. 1-10 More about this Journal
Abstract
Because of the reduced number of displayable gray levels resulting from inverse gamma correction, images on a plasma display panel (PDP) exhibit undesirable false contours in dark areas. An error diffusion method has been applied to remedy this problem. However, it is computationally expensive and requires large memory resources. This paper proposes a computationally efficient dithering based technique to improve the gray level reproduction capability in dark areas. In the proposed method, multiple dithering masks ate utilized in turn to improve the gray level reproduction in dark areas. Also, in order to reduce undesirable regular patterns generated by the dithering method, positions of threshold values within a given dithering mask are changed. Compared to the error diffusion method, the proposed method requires much less computations and memory resources with a comparable gray level reproduction capability.
Keywords
플라즈마 디스플레이;디더링;역감마 보정;
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