Abstract: A display panel includes an amorphous silicon gate driver in which a lower voltage than the gate-off voltage output from the gate driver is applied to an adjacent stage as a low voltage transmission signal.

Abstract: An incoming call service method and apparatus for an exchange, having a character conversion table and a specific function table, includes: receiving and comparing an extension number and a password of a subscriber upon the generation of a specific office line incoming call; if the extension number and the password are identical to previously stored information, analyzing key data received, based upon the character conversion table and the specific function table; if the received key data is character information, converting the key data into character data to transmit the character data to a corresponding extension subscriber; and if the key data is function information, setting a corresponding function of the corresponding extension subscriber.