Signal transmitting assembly for cutting off driving signal for driving designated light source and electronic apparatus having the same

摘要

A signal transmitting circuit is provided for cutting off or outputting at least one driving signal for driving a designated light source. The signal transmitting circuit includes an input differential signaling driver, an output differential amplifier, and a fixed-voltage-level-difference supply device. The input differential signaling driver is for receiving a display signal, and outputting an inverting signal and a non-inverting signal according to the display signal. The output differential amplifier is for receiving the inverting signal and non-inverting signal and outputting or cutting off the driving signal according to the voltage-level difference between the inverting signal and the non-inverting signal. The fixed-voltage-level-difference supply device is for supplying a fixed-voltage-level difference to replace the inverting signal and the non-inverting signal received by the output differential amplifier; therefore the output of the output differential amplifier remains low voltage-level to cut off the output of light with a designated color.

主权项

1. An electronic apparatus, comprising:
a signal transmitting circuit, for cutting off or outputting a driving signal for driving a designated light source, comprising:
an input differential amplifier, configured to receive a display signal, and output an inverting signal and a non-inverting signal according to the display signal;an output differential amplifier; anda fixed-voltage-level-difference supply device, electrically connected between the input differential amplifier and the output differential amplifier, the fixed-voltage-level-difference supply device configured to be switched to between an enable state and a cut-off state, wherein:
in the enable state, the inverting signal and the non-inverting signal from the input differential amplifier are supplied to the output differential amplifier, and the output differential amplifier outputs the driving signal for driving the designated light source according to the voltage-level difference between the inverting signal and the non-inverting signal; andin the cut-off state, a fixed-voltage-level difference is supplied by the fixed-voltage-level-difference supply device to the output differential amplifier in place of the inverting signal and the non-inverting signal, so as to switch the output differential amplifier to cut off the driving signal, wherein the fixed-voltage-level difference comprises two fixed signals that are different in value; a display panel, comprising a plurality of pixel cells; a panel driving circuit, for receiving the driving signal for driving the designated light source from the output differential amplifier, configured to enable at least one of the plurality of pixel cells of the display panel; a main electronic circuit, at least comprising a central processing unit, a system bridge chipset, a controller, a system memory module, a data storage medium and a display interface; wherein the central processing unit, the system memory module, the data storage medium, the display interface and the controller are electrically connected to the system bridge chipset, and the display interface is configured to generate the driving signal for driving the designated light source and transmitting the driving signal to the input differential amplifier.