| 摘要 |
A signal transmitting circuit (100) is provided for cutting off or outputting at least one driving signal (S-out) for driving a designated light source. The signal transmitting circuit (100) includes an input differential signalling driver (130), an output differential amplifier (140), and a fixed-voltage-level-difference supply device (160). The input differential signalling driver (130) is for receiving a display signal (S-in), and outputting an inverting signal and a non-inverting signal according to the display signal (S-in). The output differential amplifier (140) is for receiving the inverting signal and non-inverting signal and outputting or cutting off the driving signal (S-out) according to the voltage-level difference between the inverting signal and the non-inverting signal. The fixed-voltage-level-difference supply device (dV) is for supplying a fixed-voltage-level difference to replace the inverting signal and the non-inverting signal received by the output differential amplifier (140); therefore the output of the output differential amplifier (140) remains low voltage-level to cut off the output of light with a designated colour. |
