Patent ID: 7728831
Filing Date: 2010-06-01
Classification: G09G

Abstract:
1. A semiconductor device that drives an electro-optical panel, the semiconductor device comprising: a source circuit that drives a plurality of source lines of the electro-optical panel; and a control circuit that controls the source circuit, the source circuit including: a plurality of operational amplifiers that respectively drive the plurality of source lines; a plurality of transmission gates provided corresponding to the plurality of operational amplifiers, one end of each of the plurality of transmission gates being connected to a corresponding source line among the plurality of source lines; and a buffer circuit that outputs a switch control signal that causes the plurality of transmission gates to be turned ON/OFF; and when the number of transmission gates that are turned ON/OFF using the buffer circuit is referred to as n, a gate width and a gate length of a MOSFET of each of the plurality of transmission gates are respectively referred to as Wb and Lb, a gate width and a gate length of a MOSFET of the buffer circuit are respectively referred to as Wa and La, and K indicates a constant, the relationship n×Wb×Lb≧K×(Wa/La) being satisfied.