Power Minimization in a Backlit TFT-LCD Display by Concurrent Brightness and Contrast Scaling
Proceedings of the conference on Design, automation and test in Europe - Volume 1
DLS: dynamic backlight luminance scaling of liquid crystal display
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
HEBS: Histogram Equalization for Backlight Scaling
Proceedings of the conference on Design, Automation and Test in Europe - Volume 1
DTM: dynamic tone mapping for backlight scaling
Proceedings of the 42nd annual Design Automation Conference
Energy efficiency of handheld computer interfaces: limits, characterization and practice
Proceedings of the 3rd international conference on Mobile systems, applications, and services
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
EMSOFT '08 Proceedings of the 8th ACM international conference on Embedded software
EMSOFT '09 Proceedings of the seventh ACM international conference on Embedded software
Power modeling of graphical user interfaces on OLED displays
Proceedings of the 46th Annual Design Automation Conference
Users and batteries: interactions and adaptive energy management in mobile systems
UbiComp '07 Proceedings of the 9th international conference on Ubiquitous computing
Visual quality analysis for dynamic backlight scaling in LCD systems
Proceedings of the Conference on Design, Automation and Test in Europe
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This paper presents an algorithm for minimizing power consumption of backlights in color sequential displays. The proposed algorithm reduces power consumption by scaling the luminous intensity of the red, green, and blue backlights independently according to the image histograms of each color field. The algorithm consists of two phases. The first phase, chromaticity scaling, finds the optimal ratios of red, green, and blue backlights subject to a perceived color difference constraint. The second phase, luminance scaling, finds the optimal dimming factor subject to a perceived lightness difference constraint. The perceived color and lightness differences are measured by the CIELAB Color Difference Equation ΔE*ab, a standard metric for measuring color variation. The proposed method can be applied to RGB LED-backlit LCDs as well. Within limited perceivable difference ΔE*ab ≤ 2, up to 64% of power consumption can be reduced for the benchmark images.