To reduce power consumption and improve image quality including contrast ratio and color gamut, LED backlight units (BLUs) consisting of many small blocks in 2-dimensional space are implemented. Either white-gray-level luminance or color is controlled by the local dimming LED BLU. However, such a BLU can induce various recognizable artifacts. A method is proposed for exact block luminance calculation along with a new algorithm to correct local dimming artifacts. A new concept of color classes has also been developed to achieve extremely wide color gamut and to minimize color related artifacts.
Adaptive luminance and power control is proposed for LCD‐TVs with LED backlight units to provide several advanced features compared to conventional local dimming LED backlights. with ALPC, the luminance of a bright image on the display increases as the size of the bright image decreases, resulting in higher image quality that is more comfortable to end users. A 46” FHD LCD‐TV equipped with an ALPC LED backlight achieved peak luminance of 500 nits and a contrast ratio of 100,000:1 with 30% fewer LEDs and maximum power consumption of 100W.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.