Title :
A local-dimming LED BLU driving circuit for a 42-inch LCD TV
Author :
Park, Yu-Cheol ; Kim, Hee-Jun ; Lee, Back-Haeng ; Shin, Dong-Hyun
Author_Institution :
Intell. Vehicle Technol. R&D Center, KATECH, South Korea
Abstract :
This paper presents an LED BLU driving circuit with a local-dimming structure. The efficiency of the proposed LED driver has been improved by parallel driving 8 serial-connected LED arrays. It employed the soft-switching boost converter topology to reduce the switching power loss of the hard switching boost converter. The soft-switching converter reveals superior ripple and efficiency. A smaller inductance can be used for the soft-switching converter contrasting to the hard-switching one and studied on an over-voltage protection circuit of the output of the driver at the no load condition.
Keywords :
LED displays; driver circuits; liquid crystal displays; overvoltage protection; power convertors; television displays; LCD TV; LED arrays; LED driver; local-dimming LED BLU driving circuit; over-voltage protection circuit; soft-switching boost converter topology; Automotive engineering; Circuit topology; Energy consumption; Light emitting diodes; Light sources; Protection; Pulse width modulation; Pulse width modulation converters; Switching converters; TV;
Conference_Titel :
Telecommunications Energy Conference, 2009. INTELEC 2009. 31st International
Conference_Location :
Incheon
Print_ISBN :
978-1-4244-2490-0
Electronic_ISBN :
978-1-4244-2491-7
DOI :
10.1109/INTLEC.2009.5351895
