Chunghwa Picture Tubes, Ltd.

Yao-Hung Lai

Kuang-Lang Chen

Shiuh-Bin Kao

Liang-Kuei Hsu

Ching-Hui Lin

Chun-Hsu Lin

Pin-Hung Chou

A method for implementing error diffusion on a plasma display panel (PDP) comprises the steps of performing an anti compensation process on a received video signal of the PDP; diffusing an error generated by a first one of a plurality of pixels to a plurality of adjacent pixels; absorbing errors generated by the plurality of adjacent pixels by the first pixel; and multiplying each of a plurality of numeric weightings and the error of each of the adjacent pixels to obtain an error function of the first pixel. This is effected in a cost effective while simple addition circuit for solving the problem of low level contouring in PDP due to insufficient gray scale of video signal in low gray scale.

Method for implementing error diffusion on plasma display panel

A method for reducing dynamic false contour in a plasma display panel (PDP) comprising the steps of selecting gray scales of different visual concentration series from all of gray scales available to be shown on said PDP to form a visual concentration conversion table, selecting at least one of said visual concentration series as a virtual visual concentration series, and converting original input value of gray scale of each discharge unit into corresponding gray scales of different visual concentration series and virtual visual concentration series, while showing each field of a dynamic image on said PDP, in order to average visual concentration difference between gray scales of two adjacent discharge units on the dynamic field into a smaller one.

Method and apparatus for reducing dynamic false contour in plasma display panel by decreasing visual concentration difference

A compensation process for improving color saturation and image quality of a plasma display panel (PDP) is provided, wherein a brightness of light generated from each of red, green, and blue discharge cells of each pixel on said PDP is calculated through a numeric operation according to laws of color matching. The process comprises the step of increasing or decreasing the strength of input image signals of each of the red, green, and blue discharge cells in accordance with the calculation result for adjusting brightness of the generated red, green, and blue lights so as to subtract a visible light generated by gas in each of the red, green, and blue discharge cells during gas discharging, thereby eliminating an adverse effect of the visible light on color purity and color temperature of the PDP during gas discharging. This can obtain an image on PDP having an optimum color purity and color temperature and reduce the manufacturing cost.

Compensation method for improving color purity and color temperature of plasma display panel by adjusting the strength of input image signals

A structure and method for arranging poles in a plasma display panel comprises a plurality of spaced apart parallel X poles and Y poles on an inner surface of plasma display panel wherein each X pole is adjacent to a Y pole. Power contacts are formed on either ends of X and Y poles. As such, once an open circuit occurred in one of poles in the manufacturing process, power contact at one end associated with the malfunctioned pole may be connected to the power contact of the pole at the other end. As such, the malfunctioned pole may be powered continuously so as to discharge. With this, the quality of plasma display panel is not significantly adversely affected by the defect, thus increasing yield and resulting in an increase in the manufacturing cost.

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Taipei, Taiwan

Yao-Hung Lai