2010•SID Symposium Digest of Technical PapersRequires access

29.4: A RGB‐LEDs Backlight Driver with Field Color Sequential (FCS) and Energy‐Recycling (ER) Techniques for Minimum Power Loss on LCD System

Ming‐Hsin Huang, Chih‐Yu Yang, Yueh‐Chang Tsai, Chun‐Yu Hsieh, Ke‐Horng Chen

Abstract

Abstract A field‐color‐sequential (FCS) LCD technique with a direct‐lit red, green, and blue (RGB) light‐emitting diode (LED) backlight driver is proposed to achieve the demands of weightless, thickness, perfect image‐quality, and low power‐consumption of liquid crystal display (LCD) television (TV). In this paper, the proposed FCS‐LCD controller uses only one single LED driver to alternatively switch driving voltage between 40V for driving 12‐serie G‐ or B‐LEDs and 26V for 12‐serie R‐LEDs. In addition, In order to, the proposed energy‐recycling (ER) technique can harvest the extra energy when the driving voltage switches from 40V to 26V. Experimental result shows the energy‐saving be higher than 17% of the conventional driving method.

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Key concepts: Backlight, Liquid-crystal display, Light-emitting diode, RGB color model, Voltage, Energy consumption, Energy (signal processing), Power (physics)