Title :
Abrupt Power-Off Detector for Mobile TFT-LCD Driver IC
Author :
Lee, Jae-Goo ; Woo, Jae-Hyuck ; Lee, Guhn-Sang ; Kang, Im-Soo ; Kim, Bong-Nam ; Kim, Jin-Tae ; Kong, Bai-Sun ; Jun, Young-Hyun ; Chil-Gee Lee
Author_Institution :
Sungkyunkwan Univ., Suwon
Abstract :
A circuit technique to detect unexpected power condition such as battery separation is presented. Abrupt power-off due to this unexpected power condition may cause an abnormal display in mobile TFT-LCD because adequate power-off sequence cannot be performed. To demonstrate feasibility of the APD, test chip was designed and fabricated in a 30-V/4-um 5-V/0.8-um 2.5-V/0.25-um triple-well CMOS process. Experimental results show that the proposed APD improves display quality by allowing a proper power-off sequence at all abrupt power-off conditions.
Keywords :
CMOS integrated circuits; driver circuits; integrated circuit design; mobile handsets; thin film transistors; abrupt power-off detector; battery separation; display quality; mobile TFT-LCD driver IC; size 0.25 mum; size 0.8 mum; size 4 mum; test chip design; triple-well CMOS process; voltage 2.5 V; voltage 30 V; voltage 5 V; Batteries; Capacitors; Detectors; Displays; Driver circuits; Electrodes; Equivalent circuits; Power supplies; Thin film transistors; Voltage;
Conference_Titel :
Circuits and Systems, 2006. MWSCAS '06. 49th IEEE International Midwest Symposium on
Conference_Location :
San Juan
Print_ISBN :
1-4244-0172-0
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2006.382119
