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P‐193L: Late‐News Poster : Optimized Local Dimming Solution in IPS‐mode LCD Technology
Author(s) -
Kwon KyungJoon,
Lee Junghwan,
Oh EuiYeol,
Chung InJae
Publication year - 2010
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3500070
Subject(s) - backlight , clipping (morphology) , liquid crystal display , flicker , brightness , contrast ratio , power consumption , contrast (vision) , compensation (psychology) , computer science , pixel , power (physics) , mode (computer interface) , optics , computer vision , computer graphics (images) , physics , psychology , philosophy , linguistics , quantum mechanics , psychoanalysis , operating system
High contrast ratio and low power consumption for LCDs with LED BLU can be obtained by backlight local dimming with pixel compensation while maintaining image brightness. This technique can greatly increase the contrast ratio of IPS‐mode LCDs. The technique, however, suffers from the side effects called flicker, halo, clipping, and non‐uniformity. The intensity of the side effects is proportional to the amount of the local dimming applied. This paper presents a noble local dimming algorithm which adaptively determines the amount of backlight dimming by characteristics of each block in each scene and feedback values to maximize contrast ratio and power consumption saving effect without noticeable side effects. The experimental results of the proposed algorithm are shown along with those of conventional algorithms.