| LCD Gamma校正的硬件实现 |
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| 引用本文： | 彭国福,林正浩.LCD Gamma校正的硬件实现[J].桂林电子科技大学学报,2006,26(1):45-49. |
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| 作者姓名： | 彭国福 林正浩 |
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| 作者单位： | 同济大学,微电子中心,上海,200092 |
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| 摘 要： | 通过对液晶(LC)S型电光响应曲线的研究,设计了一种由非线性DAC来实现LCD Gamma校正过程.由模拟退火算法获得了C-DAC中7个关键电容参数值,用设计出buffer来提高DAC驱动负载的能力,并通过直接译码电路,巧妙地解决了显示输出对比度的问题,经过对 Matlab和Hspice仿真,证明可以实现LCD Gamma校正的功能,解决了显示图像精确逼近原始图像的问题.
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| 关 键 词： | S型 电光响应 非线性DAC LCD Gamma校正 模拟退火算法 buffer |
| 文章编号： | 1001-7437(2006)01-0045-05 |
| 修稿时间： | 2005年11月17 |
Hardware Design for Implementation of LCD Gamma Correction |
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| PENG Guo-fu,LIN Zheng-hao.Hardware Design for Implementation of LCD Gamma Correction[J].Journal of Guilin Institute of Electronic Technology,2006,26(1):45-49. |
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| Authors: | PENG Guo-fu LIN Zheng-hao |
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| Abstract: | 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. |
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| Keywords: | S-shaped electro-optic non-linear DAC LCD Gamma correction simulated annealing buffer |
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