Abstract
This paper presents an efficient optimized backlight local dimming method that
minimizes power consumption under a given allowable distortion for liquid crystal
displays with edge-lit light-emitting diode backlight. To reduce image quality
fluctuation, an inequality constraint optimization problem is formulated using a given
allowable distortion and the steepest descent method is used to solve the optimization
problem. The experimental results show that the proposed method has better performance
than previous methods at the same average power consumption in the unnoticeable level of
the difference between the displayed images before and after dimming. Also, the proposed
method reduces the risk of large performance degradation and reduces computation time by
three times compared with the existing optimization based methods.
© 2015 IEEE
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