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Proceedings Paper

Optimal local dimming for LED-backlit LCD displays via linear programming
Author(s): Xiao Shu; Xiaolin Wu; Søren Forchhammer
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Paper Abstract

LED-backlit LCD displays hold the promise of improving the image quality while reducing the energy consumption with signal-dependent local dimming. To fully realize such potentials we propose a novel local dimming technique that jointly optimizes the intensities of LED backlights and the attenuations of LCD pixels. The objective is to minimize the distortion in luminance reproduction due to the leakage of LCD and the coarse granularity of the LED lights. The optimization problem is formulated as one of linear programming, and both exact and approximate algorithms are proposed. Simulation results demonstrate superior performances of the proposed algorithms over the existing local dimming algorithms.

Paper Details

Date Published: 15 February 2012
PDF: 7 pages
Proc. SPIE 8305, Visual Information Processing and Communication III, 83050K (15 February 2012); doi: 10.1117/12.912106
Show Author Affiliations
Xiao Shu, McMaster Univ. (Canada)
Xiaolin Wu, McMaster Univ. (Canada)
Søren Forchhammer, Technical Univ. of Denmark (Denmark)

Published in SPIE Proceedings Vol. 8305:
Visual Information Processing and Communication III
Amir Said; Onur G. Guleryuz; Robert L. Stevenson, Editor(s)

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