LED backlight driving system with local dimming and scanning driver IC |
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| Authors: | Ki‐Chan Lee Kyoung‐Uk Choi Sang‐Gil Lee Yun‐Jae Park Hyun‐Seok Ko Seung‐Hwan Moon Brian H. Berkeley |
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| Affiliation: | 1. Intersil Corp., Display Power, 1001 Murphy Ranch Rd., Milpitas, CA 95035, U.S.A.;2. Samsung Electronics, Co., Ltd., Development Center, LCD Business, Chungcheongnam‐do, Korea;3. Samsung Mobile Display, Kiheung, Korea |
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| Abstract: | 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. To attain high efficiency from the boost converter, highly advanced dynamic headroom control technology has been implemented onto the IC. The embedded current boosting function showed almost no brightness reduction when operated in scanning mode. The scanning function of the system improved motion blur values 26–44% compared to that of a non‐scanning LCD panel. |
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| Keywords: | LED backlight local dimming scanning driver IC |
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