Driving apparatus of display with pre-charge mechanism

摘要

A driving apparatus of a display is disclosed. The driving apparatus includes a digital-to-analog converter (DAC) circuit, an output buffer circuit and a pre-charge circuit. The DAC circuit receives a display data with a digital format for generating a gray level voltage. The output buffer circuit is coupled to the DAC circuit, and has an output terminal to output an output signal. The output buffer circuit receives the gray level voltage and the output signal, and compares the gray level voltage and the output signal to generate a comparison result. The pre-charge circuit is coupled to the output buffer circuit, and generates a pre-charge output signal to the output terminal of the output buffer circuit according to the comparison result and a pre-charge enable signal.

主权项

1. A driving apparatus of a display, comprising:
a digital-to-analog converting (DAC) circuit, for receiving a display data with a digital format, and generating a gray level voltage according to the display data; an output buffer circuit, coupled to the DAC circuit, and having an output terminal to output an output signal, the output buffer circuit receiving the gray level voltage and the output signal and comparing the gray level voltage and the output signal to generate a comparison result; and a pre-charge circuit, coupled to the output buffer circuit, and generating a pre-charge output signal to the output terminal of the output buffer circuit according to a pre-charge enable signal wherein the output buffer circuit does not provide the comparison result to the pre-charge circuit.