16 May 2003 LCD gamma correction by nonlinear digital-to-analogue converter
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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.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Harry G. Walton, Harry G. Walton, Michael Brownlow, Michael Brownlow, Jeremey Lock, Jeremey Lock, Mouhamed Rahal, Mouhamed Rahal, Patrick Zebedee, Patrick Zebedee, "LCD gamma correction by nonlinear digital-to-analogue converter", Proc. SPIE 5004, Poly-Silicon Thin Film Transistor Technology and Applications in Displays and Other Novel Technology Areas, (16 May 2003); doi: 10.1117/12.482576; https://doi.org/10.1117/12.482576

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