Patent ID: 8212765

Claim:
A liquid crystal display comprising: a display face; a plurality of backlights for illuminating the display face, producing a visible light on the display face, each backlight being associated with a power supply for providing power to the backlight; a plurality of liquid crystal elements that selectively obscure light from the plurality of backlights when activated by application of current; a plurality of power supply controllers separate from the power supplies and individually operative to issue a synchronization pulse waveform with an on-time to individual ones of the power supplies according to a received brightness control input, the synchronization pulse waveform having an on-time during which the backlight is provided with power and an off-time during which the backlight is not provided with power, the individual power supply controllers continuously providing the synchronization pulse waveform to direct the corresponding power supplies to selectively dim the backlights during transition periods of the liquid crystal elements.