Abstract: When applying exogenous noise with a synchronizing signal or a transmission clock period, influence by the applied noise is inhibited from appearing on a liquid crystal display, without increasing circuit size. There are included: a timing controller generating a control signal of a scanning line driving gate driver and a control signal of a signal line driving source driver based on an input signal to be a reference inputted from the outside; an enable signal generation unit including a noise detecting circuit for detecting various items of noise entering the input signal and outputs an enable signal for turning OFF or ON the output of a gate driver control signal for a predetermined period based on output from the noise detecting circuit; and an image data output control circuit when detecting noise synchronized in a vertical period. The gate driver control signal is controlled to have an idle period.

Abstract: PROBLEM Unauthorized reproduction by a third party is to be prohibited by preventing waveform monitoring on a circuit board and by providing security from the viewpoint of hardware. SOLUTION The present invention disables waveform observation by providing a capacitance detection circuit 3 between devices (i.e., between a programmable device 1 and a nonvolatile device 2) so as to detect input capacitance of the waveform observation apparatus and to halt data signals themselves between the devices (i.e., between the programmable device 1 and nonvolatile device 2).

Abstract: When applying exogenous noise with a synchronizing signal or a transmission clock period, influence by the applied noise is inhibited from appearing on a liquid crystal display, without increasing circuit size. There are included: a timing controller generating a control signal of a scanning line driving gate driver and a control signal of a signal line driving source driver based on an input signal to be a reference inputted from the outside; an enable signal generation unit including a noise detecting circuit for detecting various items of noise entering the input signal and outputs an enable signal for turning OFF or ON the output of a gate driver control signal for a predetermined period based on output from the noise detecting circuit; and an image data output control circuit when detecting noise synchronized in a vertical period. The gate driver control signal is controlled to have an idle period.

Abstract: PROBLEM Unauthorized reproduction by a third party is to be prohibited by preventing waveform monitoring on a circuit board and by providing security from the viewpoint of hardware. SOLUTION The present invention disables waveform observation by providing a capacitance detection circuit 3 between devices (i.e., between a programmable device 1 and a nonvolatile device 2) so as to detect input capacitance of the waveform observation apparatus and to halt data signals themselves between the devices (i.e., between the programmable device 1 and nonvolatile device 2).