| 摘要 |
A brightness control circuit ( 1 ) for a lighting unit ( 2 ) of a matrix display unit ( 3 ) having transmissive or reflective pixels (Pi) is disclosed. The brightness control circuit ( 1 ) comprises an integrator ( 10 ) to integrate color component signals (R, G, B) of an input image signal (IS) to be displayed on the matrix display unit ( 3 ) to obtain integrated signals (IR, IG, IB). A selector ( 11 ) supplies the one of the integrated signals (IR, IG, IB) having a highest level to the lighting unit ( 2 ) to obtain a brightness of the lighting unit ( 2 ) depending on said highest level.
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