Adaptive scanning, 1‐D dimming,and boosting backlight for LCD‐TV systems

Abstract— Because TV applications require proper motion portrayal, overdrive and impulse driving are both required. Advanced lamp control enables Scanning Backlight Technology to drive the LCD panel with a pulsed exposure. Adaptive Dual‐Pulse Technology can be applied to eliminate the induced image flicker. Light leaking through LCD panels driven to black can be described as a poor black level, limiting the contrast ratio. Adaptive Dimming Technology can be applied to dim the backlight, while maintaining image quality and saving power. The limited transmittance of LCD panels can be described as weak brightness. The transmission of the LCD panel should be maximized and Adaptive Boosting Technology can be used to boost the backlight (>100%). When combining these technologies, motion portrayal is enhanced, local brightness may double, and the contrast may be increased up to a factor of 20, still saving power.