DISPLAY DRIVING CIRCUIT AND OUTPUT BUFFER CIRCUIT THEREOF

摘要

Provided are an output buffer circuit capable of outputting a pair of output signals having different polarities and a display driving circuit including the same. The output buffer circuit includes output buffers which output a positive output signal and a negative output signal in response to a pair of input signals having different polarities. As the output buffers are driven while sharing a common voltage, the output buffer circuit satisfies a low-power specification, and has a stable electrical characteristic.

主权项

1. An output buffer circuit of a display driving circuit, comprising:
a first output buffer configured to output a first output signal to a display panel using a first voltage and a common voltage lower than the first voltage in response to a first input signal; and a second output buffer configured to output a second output signal to the display panel using the common voltage and a second voltage lower than the common voltage in response to a second input signal, wherein the first output buffer comprises one or more first NMOS transistors driven by the common voltage in order to receive the first input signal or output the first output signal, the second output buffer comprises one or more second NMOS transistors driven by the second voltage in order to receive the second input signal or output the second output signal, and the first NMOS transistor is electrically isolated so as to be prevented from being shorted to the second NMOS transistor via a substrate.