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Proceedings Paper

LCD gamma correction by nonlinear digital-to-analogue converter
Author(s): Harry G. Walton; Michael Brownlow; Jeremey Lock; Mouhamed Rahal; Patrick Zebedee
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Paper Abstract

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.

Paper Details

Date Published: 16 May 2003
PDF: 9 pages
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
Show Author Affiliations
Harry G. Walton, Sharp Labs. Europe (United Kingdom)
Michael Brownlow, Sharp Labs. Europe (United Kingdom)
Jeremey Lock, Sharp Labs. Europe (United Kingdom)
Mouhamed Rahal, Sharp Labs. Europe (United Kingdom)
Patrick Zebedee, Sharp Labs. Europe (United Kingdom)


Published in SPIE Proceedings Vol. 5004:
Poly-Silicon Thin Film Transistor Technology and Applications in Displays and Other Novel Technology Areas
Apostolos T. Voutsas, Editor(s)

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