INTERFACE SYSTEM FOR CHIP ON GLASS APPLICATION

摘要

PURPOSE: An interface system for a COG application is provided to regularly keep the difference of current applied to a transmission line by independently transmitting the logic state of data to transmit by difference between a supplementary data current and a gad data current. CONSTITUTION: A first data current source(100) independently produces a gad data current forming a differential current. A second data current source(200) independently produces a supplementary data current forming the differential current. A selection switch comprises a first selection switch(310) and a second selection switch(320). The first selection switch switches the gad data current of the first data current source with a true line and bar line according to the logic state of data. The second selection switch switches the supplementary data current produced in the second data current source between the bar line and true line. In order to equalize the electric potential, an equalization switch(400) is connected to between the true line and bar line. A switching controller controls the switching action of the selection switch according to the transition of transmitted-data and equalization switch.