ELECTROSTATIC DISCHARGE PROTECTION CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide an electrostatic discharge protection circuit having a novel structure that is applicable to a source driver of a drive integrated circuit chip in a liquid crystal display device supporting a dot inversion scheme. SOLUTION: The electrostatic discharge protection circuit includes: a first output buffer 206A connected between a first power line and a ground line, and providing a first operating voltage to an input/output buffer; a second output buffer 206B connected between the ground line and a second power line, and providing a second operating voltage to the input/output pad; a first transfer unit 308A in which one or more diodes are connected in series between the first power line and the input/output pad; and a second transfer unit 308B in which one or more diodes are connected in series between the input/output pad and the second power line. The one or more diodes of the first transfer unit have a breakdown voltage higher than the first operating voltage and the one or more diodes of the second transfer unit have a breakdown voltage higher than the second operating voltage. COPYRIGHT: (C)2010,JPO&INPIT