Design of resonant backlight inverter by using primary-side control and double-ended driving

Author

Lin, Chang-Hua ; Hsieh, Shang-Po ; Wang, Chien-Ming ; Lin, Chung-Heng

Author_Institution

Dept. of Electr. Eng., Tatung Univ., Taipei

fYear

2009

fDate

25-27 May 2009

Firstpage

794

Lastpage

798

Abstract

A resonant backlight inverter with double-ended driving and primary-side control are proposed to reduce the thermometer effect and leakage current effect in LCD. In this paper, the mathematical model of the lamp current including the parasitical capacitance in LCD panel is conducted to explore the influence of leakage current effect. Moreover, the primary-side control and the DPLL function are integrated to form a feedback mechanism to track the optimal operating frequency. And then the influence of parasitic capacitance can be reduced so as to eliminate the leakage current effect. Experimental results agree with the theoretical predictions.

Keywords

liquid crystal displays; resonant power convertors; DPLL function; LCD panel; double-ended driving; lamp current; parasitical capacitance; primary-side control; resonant backlight inverter; Capacitors; Chromium; Equivalent circuits; Flat panel displays; Leakage current; Liquid crystal displays; Magnetic resonance; Mathematical model; Parasitic capacitance; Resonant inverters; CCFL; DPLL; backlight; double-end driving; leakage current effect; parasitic capacitance; primary-side control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics and Applications, 2009. ICIEA 2009. 4th IEEE Conference on

Conference_Location

Xi´an

Print_ISBN

978-1-4244-2799-4

Electronic_ISBN

978-1-4244-2800-7

Type

conf

DOI

10.1109/ICIEA.2009.5138312

Filename

5138312