TFT-LCD Module ESD Failure Analysis and Protection Research
LI Qing-shuo, WU Qian, WANG Sha
Chengdu BOE Optoelectronics Technology Co., Ltd, Chengdu 611731, China
The relationship between LCD construction and Electrostatic Discharge(ESD) path was studied. Driver IC with the 2 kV ability for ESD generally, is the most easily damaged device when LCD attacked by ESD and the ESD charge is unable to disperse. LCD module can't work properly when drive IC was damaged. It is proved that additional device for ESD protect on the path of ESD circuit can conduct instantaneous current to ground to improve the ESD resistant ability of LCD module. A new method for additional electrostatic ring design on TFT substrate can instead of adding TVS tubes on FPC circuit, and this new design can be implemented without cost up.