Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)
- 2008.06a
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- Pages.271-273
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- 2008
Average Current Controlled X-Y Channel Driving White LED Backlight System for 46" LCD TV
- Cho, Dae-Youn (Display Research Center, KAIST) ;
- Oh, Won-Sik (KAIST) ;
- Cho, Kyu-Min (Display Research Center, KAIST) ;
- Moon, Gun-Woo (Display Research Center, KAIST) ;
- Yang, Byung-Choon (LCD Development Center, Samsung Electronics Co. Ltd.) ;
- Jang, Tae-Seok (LCD Development Center, Samsung Electronics Co. Ltd.)
- Published : 2008.06.30
Abstract
A novel white-LED (light emitting diode) backlight system for 46"LCD TVs which involves the average current controlled X-Y channel driving method is proposed, which is composed of 1 converter and row and column channel switches. In the conventional X-Y channel driving driven with a constant voltage source, the driving current of LED increases because the threshold voltage of LED decreases when LED temperature goes up. To maintain the luminance of backlight constant, the average current controlled X-Y channel driving will be employed. Finally the results are confirmed by experimental results.
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