Design and analysis of a piezoelectric transformer-based half-bridge resonant inverter for CCFL backlight modules

被引：5

作者：

Lo, Yu-Kang ^{[1
]}

Lin, Chang-Hua ^{[2
]}

Pai, Kai-Jun ^{[1
]}

机构：

[1] NTUST, Dept Elect Engn, Taipei 10607, Taiwan

[2] St Johns Univ, Dept Comp & Commun Engn, Taipei 25135, Taiwan

来源：

2006 IEEE INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS, VOLS 1-7 | 2006年

关键词：

D O I：

10.1109/ISIE.2006.295753

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A half-bridge (HB) resonant inverter for driving a cold cathode fluorescent lamp (CCFL) backlight module with a piezoelectric transformer (PT) is analyzed in this paper. The resonant inductance of the HB inverter is expressed as a function of the load current, the load resistance the PT circuit parameters. Also, the trans-admittance of the PT-CCFL combination network is measured to track the resonant frequency of the PT which may be varied due to the temperature rise. The efficiency of the HB resonant inverter, the output power of the PT and the CCFL driving current are thus remained almost constant. Experiments show that the observed results match the theoretical analyses.

引用

页码：892 / +

页数：2

共 14 条

[1] Power minimization in a backlit TFT-LCD display by Concurrent Brightness and Contrast Scaling [J].