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LCD gamma correction by non-linear digital-to-analogue converter

机译:非线性数模转换器的LCD伽马校正

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摘要

The non-linear transmission / voltage characteristic of the pixels of a liquid crystal display (LCD) must be corrected for during the digital-to-analogue conversion of image data. This process of 'gamma correction' is conventionally performed by a combination of a digital 'look-up table' and a linear digital-to-analogue converter (DAC) with a bit resolution, m, greater than the bit depth, n, of the digital image (m>n). We present a new method of LCD gamma correction based upon a carefully optimised non-linear DAC with a bit resolution of only n. By reducing DAC complexity we are able to reduce circuit area and move towards our vision of a fully integrated CGS, system-on-panel LCD.
机译:在图像数据的数模转换期间,必须校正液晶显示器(LCD)像素的非线性透射/电压特性。传统上,这种“伽马校正”过程是通过数字“查找表”和线性数模转换器(DAC)的组合来执行的,它的位分辨率m大于n的位深度n。数字图像(m> n)。我们提出了一种基于精心优化的非线性DAC的LCD伽马校正的新方法,其比特分辨率仅为n。通过降低DAC的复杂度,我们能够减少电路面积,朝着完全集成CGS,面板上LCD的愿景迈进。

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