ZHAO Xiao-zhen, LIU Bo, ZHANG Xiao-bing, HUANG Rong-yuan, LIU Ru-feng, QI Ling-yun. Regulated method of realizing white balance for LCD based on FPGA[J]. , 2014,29(3): 377-382
ZHAO Xiao-zhen, LIU Bo, ZHANG Xiao-bing, HUANG Rong-yuan, LIU Ru-feng, QI Ling-yun. Regulated method of realizing white balance for LCD based on FPGA[J]. , 2014,29(3): 377-382 DOI: 10.3788/YJYXS20142903.0377.
In order to solve the phenomenon of color temperature excursion for LCD at different luminance
the paper analyzes each part of adjusting white balance. First
according to the theory of adjusting white balance
the paper adopts the method of adjusting OGB backlight to realize white balance for LCD from extent of difficulty and accomplishment on each part. Then on the base of color sensor and FPGA as controller
software design and whole scheme design are presented. Finally
curve fitting and analysis are discussed.By analyzing and comparing test results
the effect of white balance will be perfect after experimentation of high and low temperature
vibration
wetness and mildew. After adjusting white balance
the range of color exhibition is enlarged and the color temperature can remain steady so that LCD can show image vividly. Besides
the range of color temperature is within 0.005
the error is about 0.63%. LCD can meet the demand of color stability and color temperature on avionics display.
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