COLUMN DRIVER OF DISPLAY DEVICE

摘要

A column driver of a display device provides a high slew rate with lowered power requirements by using external switches connected to upper and bottom output buffers. The upper output buffer is driven between a first voltage rail and a second voltage rail, and outputs a first output signal in response to a first input signal and a second input signal. The bottom output buffer is driven between the second voltage rail and a third voltage rail, and outputs a second output signal in response to a third input signal and a fourth input signal. A first switch group selectively provides input for the upper output buffer and the bottom output buffer. A second switch group feeds back the first and the second output signals to the first or the second input terminal of each of the upper output buffer and the bottom output buffer.

主权项

1. A column driver of a display device, comprising:
an upper output buffer configured to be driven between a first voltage rail and a second voltage rail, and output a first output signal in response to a first input signal and a second input signal; a bottom output buffer configured to be driven between the second voltage rail and a third voltage rail, and output a second output signal in response to a third input signal and a fourth input signal; a first switch group configured to selectively provide the first to the fourth input signals for a first or a second input terminal of each of the upper output buffer and the bottom output buffer; and a second switch group configured to feed back the first and the second output signals to the first or the second input terminal of each of the upper output buffer and the bottom output buffer.