TY - GEN
T1 - Modeling of the parasitical capacitance effect in LCD panel and corresponding elimination strategy
AU - Lin, Chang Hua
AU - Hung, Tsung You
AU - Wang, Chien Ming
AU - Pai, Kai Jun
PY - 2007
Y1 - 2007
N2 - A mathematical model of parasitical capacitance in LCD panel is conducted to explore the influence of leakage current effect on electric characteristics. First, a class D resonant backlight inverter is employed to act as the main circuit. Next, the phase angle variations caused by the parasitic capacitances is considered as a reference parameter in the proposed control strategy. By using the primary-side control and incorporating the DPLL technique 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, hence, the system efficiency and stability will be improved. Complete mathematical analysis and design considerations are detailed. Experimental results agree with the theoretical predictions.
AB - A mathematical model of parasitical capacitance in LCD panel is conducted to explore the influence of leakage current effect on electric characteristics. First, a class D resonant backlight inverter is employed to act as the main circuit. Next, the phase angle variations caused by the parasitic capacitances is considered as a reference parameter in the proposed control strategy. By using the primary-side control and incorporating the DPLL technique 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, hence, the system efficiency and stability will be improved. Complete mathematical analysis and design considerations are detailed. Experimental results agree with the theoretical predictions.
KW - Backlight inverter
KW - DPLL
KW - Leakage current effect
KW - Parasitical capacitance
UR - http://www.scopus.com/inward/record.url?scp=49949089129&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=49949089129&partnerID=8YFLogxK
U2 - 10.1109/PEDS.2007.4487926
DO - 10.1109/PEDS.2007.4487926
M3 - Conference contribution
AN - SCOPUS:49949089129
SN - 1424406455
SN - 9781424406456
T3 - Proceedings of the International Conference on Power Electronics and Drive Systems
SP - 1618
EP - 1623
BT - 7th International Conference on Power Electronics and Drive Systems, PEDS 2007
T2 - 7th International Conference on Power Electronics and Drive Systems, PEDS 2007
Y2 - 27 November 2007 through 30 November 2007
ER -