Results 121 to 130 of about 5,857,375 (143)

Contrast gain and power savings using local dimming backlights

Journal of the Society for Information Display, 2008
Abstract— The contrast and power consumption of today's liquid‐crystal displays (LCDs) can be improved substantially by introducing (local) dimming backlights. In fact, infinite dynamic contrast and power savings of well over 50% have been claimed for such displays.
Erno H. A. Langendijk, Remco Muijs, William van Beek   +2 more
openaire   +1 more source

67.2: Compensation Methods for Local‐Dimming Backlights with RGB‐LED

SID Symposium Digest of Technical Papers, 2010
Abstract In LED backlight system with high optical independence inside a segmented block, using individually controllable RGB‐LED as light source, we can obtain the advantage of wider color gamut, lower power consumption, and wider range of LCD expression than using white‐LED. On the other hand, there are problems
Takayuki Murai, Kohji Fujiwara, Takeshi Masuda, Yuhsaku Ajichi, Tomohiko Yamamoto   +4 more
openaire   +1 more source

64.2: Spatio‐temporally Consistent Video Processing for Local Backlight Dimming

SID Symposium Digest of Technical Papers, 2008
Abstract Locally addressable backlights allow the contrast of LCDs to be improved while simultaneously reducing power consumption. for optimal performance, the associated video processing algorithms should prevent the backlight structure from appearing in the front‐of‐screen (FOS) image.
Remco Muijs, Erno Langendijk, Frank Vossen   +2 more
openaire   +1 more source

Locally pixel‐compensated backlight dimming on LED‐backlit LCD TV

Journal of the Society for Information Display, 2007
Abstract— The pixel brightness of an LCD panel perceived by a user is the product of the backlight brightness and the panel transmittance. In conventional LCD panels, the backlight brightness is constant and always at peak luminance. This design suffers from light leakage and power waste problems at dark scenes.
Hanfeng Chen, Junho Sung, Taehyeun Ha, Yungjun Park   +3 more
openaire   +1 more source

LED backlight driving system with local dimming and scanning driver IC

Journal of the Society for Information Display, 2010
Abstract— Novel LED backlight driving technology with a fully embedded LED driver IC is presented. This driving system and IC feature a high speed reduced swing differential signaling (RSDS) interface, an independent PWM controller with high‐resolution programming, and embedded scan logic.
Ki‐Chan Lee, Kyoung‐Uk Choi, Sang‐Gil Lee, Yun‐Jae Park, Hyun‐Seok Ko, Seung‐Hwan Moon, Brian H. Berkeley   +6 more
openaire   +1 more source

Viewing Distance-Based Perceived Error Control for Local Backlight Dimming

Journal of Display Technology, 2015
This paper presents an effective local dimming algorithm that preserves the perceived image quality consistently in the backlight dimmed images regardless of viewing distances. The proposed algorithm determines the clipped points of each LED block by limiting the maximum size of image area to be distorted, and guarantying the minimum image quality in ...
Dong-Gon Yoo, Kwan-Young Han
openaire   +1 more source

Research and Evaluation of Local Dimming Algorithm for LED Backlight LCD Display

Applied Mechanics and Materials, 2013
Based on the further study on the dynamic dimming algorithms, the Inverse of Mapping Function (IMF) method, the error correction method and the cumulative distribution function (CDF) method are analyzed and applied to get the dimming level in the bottom-lit backlight. 50 typical images are simulated. The power reduction, contrast ratio enhancement, and
Xi Tiao Zhang, Fen Liu, Guo Qiang Lv
openaire   +1 more source

Critical Backlight Luminance for Reducing Clipping Artifacts in Local Dimming LCDs

Chinese Journal of Liquid Crystals and Displays, 2012
A critical backlight luminance method to get balance between clipping artifacts and power consumption in local dimming LCDs is proposed.Firstly,the critical backlight luminance of middle backlight blocks and edge backlight blocks are computed with different process.Then the critical luminance is compared with the backlight luminance computed by ...
屠震涛 TU Zhen-tao, 郑仁涛 ZHENG Ren-tao, 张小宁 ZHANG Xiao-ning   +2 more
openaire   +1 more source

50.2: Power Savings by Local Dimming on a LCD Panel with Side Lit Backlight

SID Symposium Digest of Technical Papers, 2009
Abstract Local dimming of segmented direct lit backlights is a known technique to save power and improve the contrast. Also there is a trend towards slim side lit panels. with proper LED‐drivers and algorithms both technologies can be combined. The power saving can be doubled compared to a global dimmed backlight.
Hendriek Groot Hulze, Pierre deGreef
openaire   +1 more source

Spotlight characteristics of local dynamic dimming for side-lit backlight

Chinese Journal of Liquid Crystals and Displays, 2018
尹慧娟 YIN Hui-juan, 王培娜 WANG Pei-na, 吴波 WU Bo, 吴春明 WU Chun-ming, 孙文波 SUN Wen-bo, 施祖传 SHI Zu-chuan   +5 more
openaire   +1 more source