An analysis of the backlight inverter by topologies

Author

Kweon, Gie Hyoun ; Lim, Young Cheol ; Yang, Seung Hak

Author_Institution

Dept. of Electr. Eng., Chonnam Nat. Univ., Kwangju, South Korea

Volume

2

fYear

2001

fDate

2001

Firstpage

896

Abstract

Modern display panels are large and thin, and require a high voltage for the lamp. As the market demand for large display screens is increases, inverters needs to be small, high-powered, and very efficient. The backlight inverter used in a laptop computer is investigated in this paper. It has been difficult for the electromagnetic transformer in the inverter to obtain a high efficiency and compact profile. In this study, a piezoelectric transformer (PT) is used and it is shown that it reduces the loss and volume compared to the standard electromagnetic transformer. The results of the comparison with input-output and brightness-efficiency characteristics show the possibilities of lower profile and high efficiency in backlight inverters

Keywords

DC-AC power convertors; bridge circuits; invertors; lamps; laptop computers; liquid crystal displays; piezoelectric devices; power supplies to apparatus; power transformers; backlight inverter topologies analysis; brightness-efficiency characteristics; display panels; high-voltage lamps; input-output characteristics; laptop computer; piezoelectric transformer; topology classification; Brightness; Computer displays; Consumer electronics; Frequency; Inverters; Lamps; Large screen displays; Portable computers; Topology; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, 2001. Proceedings. ISIE 2001. IEEE International Symposium on

Conference_Location

Pusan

Print_ISBN

0-7803-7090-2

Type

conf

DOI

10.1109/ISIE.2001.931588

Filename

931588