Patent ID: 7245281

Claim:
A drive circuit device for a display device which drives a part of a plurality of bus lines disposed on a display panel and is connectable to a rear-stage drive circuit device via propagation signal line, the drive circuit device comprising: a driver unit that receives a propagation signal including at least one of a clock signal and a control signal, and generates a drive signal for the bus lines according to the received propagation signal, said propagation signal changing during a synchronization period in synchronization with a synchronization signal; and a gate unit that, at the timing when the rear-stage drive circuit device starts receiving the propagation signal, after elapse of predetermined time from the reception of the propagation signal by the driver unit, starts outputting of the propagation signal to the rear-stage drive circuit device via the propagation signal line, and that does not output the received propagation signal during the predetermined time to the rear-stage drive circuit device via the propagation signal line so as to suppress magnetic wave at the propagation signal line, where in the rear-stage drive circuit device generates a drive signal for the rear-stage bus lines according to the received propagation signal.