Abstract
— In this paper, an active backlight control technology and a data-processing algorithm has been developed to improve the image quality in IPS-mode LCD TVs. The image-blinking problem caused by repeatedly abrupt changes in the backlight luminance was solved by using algorithms [Fba (flexible-boundary algorithm) and Cfa (cumulative feedback algorithm)] and an optimized number of backlight dimming steps based on human perception. In the IPS-mode 42-in. TFT-LCD panel, the dynamic contrast ratio can be more than twice the typical level by means of a lower black luminance and a higher white luminance. Additionally, the power consumption and LCD temperature were lowered.
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