DocumentCode :
1496921
Title :
Energy-Recycling (ER) Technique for a Direct-Lit Intelligent Power Management Backlight Unit (BLU)
Author :
Huang, Ming-Hsin ; Tsai, Yueh-Chang ; Chen, Ke-Horng
Author_Institution :
Inst. of Electr. Control Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Volume :
25
Issue :
10
fYear :
2010
Firstpage :
2588
Lastpage :
2598
Abstract :
A field-sequential-color (FSC) liquid crystal display (LCD) technique with a direct-lit red, green, and blue LED backlight driver is proposed to achieve low weight, thin, perfect image quality, and low-power consumption of LCD television. The FSC technique performs a pseudorandom color sequence in the spatial and temporal domains to reduce color-breakup and motion-blur effects. The direct-lit RGB-LED backlight driver increases brightness, contrast, and uniformity due to the removal of a color filter. In this paper, the proposed FCS-LCD controller uses a single LED driver to switch the driving voltage alternatively between 36 V for driving 12-series G- or B-LEDs and 24 V for 12-series R-LEDs. The proposed energy-recycling technique can harvest the extra energy when the driving voltage switches from 36 to 24 V. Experimental results show that energy saving is higher than 17% of the conventional driving method.
Keywords :
driver circuits; energy conservation; image colour analysis; image restoration; light emitting diodes; liquid crystal displays; power system management; FSC LCD controller; color breakup effects; color filter; direct lit intelligent power management backlight Unit; direct-lit RGB-LED backlight driver; driving voltage; energy recycling technique; field-sequential-color liquid crystal display technique; image quality; motion blur effects; pseudorandom color sequence; voltage 24 V to 36 V; voltage switches; Energy consumption; Energy management; Erbium; Image quality; Light emitting diodes; Liquid crystal displays; Power capacitors; Recycling; Switches; TV; Direct-lit LED backlight; energy-recycling technique; field-sequential color (FSC); liquid crystal display (LCD) technique;
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/TPEL.2010.2050909
Filename :
5467183
Link To Document :
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