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《Journal of Guilin University of Electronic Technology》 2006-01
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Hardware Design for Implementation of LCD Gamma Correction

PENG Guo-fu,LIN Zheng-hao(Microelectronics Center of Tongji University,Shanghai 200092)  
A kind of non-linear DAC has been designed through careful research of liquid crystal's(LC) S-shaped electro-optic response curve.LCD gamma correction has been achieved with it.The key parameter of 7 capacitors has been obtained through a simulated annealing algorithm.By means of redesigning the buffer for the non-linear DAC,its output drive capacity has been considerably improved.In order to heighten the contrast of the display,a direct decoding circuit is put into the design.Results from Matlab and Hspice simulations prove that LCD gamma correction can be realized through the hardware design in discussion.The problem of enabling the image showing in the display to approach the original image accurately can thus be resolved.
【CateGory Index】: TN873.93
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