ZHANG Bao-long, XU Xi-yin, LI Dan, LI Yun-feng, YAO Lian-fang, XUE Yun-yun, CAO Wen, Hoising Kwok. Design of High-Power LED Driver for CS-LCoS Mini-Projector[J]. , 2012,(4): 503-507
ZHANG Bao-long, XU Xi-yin, LI Dan, LI Yun-feng, YAO Lian-fang, XUE Yun-yun, CAO Wen, Hoising Kwok. Design of High-Power LED Driver for CS-LCoS Mini-Projector[J]. , 2012,(4): 503-507DOI:
Design of High-Power LED Driver for CS-LCoS Mini-Projector
A high-power and high-brightness LED driver is developed for Color Sequential Liquid-Crystal-on-Silicon mini-projector. The LED chips are arranged in parallel due to the tendue requirement of the illumination system. However
the driving current can be around 10 A
which increases the design complexity of the LED driver. In order to solve this problem
a constant current source is developed
which is controlled by Pulse Width Modulation. The experimental results show that the driver can supply constant 10 A current with reaso-nable ripple wave and fast response character
which agrees well with the requirement of LED source.
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references
Zhang B L, Li K K, Chigrinov V G, et al. Application of photoalignment technology to liquid-crystal-on-silicon microdisplays [J]. Japanese Journal of Applied Physics, 2005,44(6A):3983-3991.
Himax Display, Inc. HX7308BTJFA [EB/OL].[2010-8-20]. http://www.himaxdisplay.com/en/product/HX7308.asp.