Source driving circuit, source driving method and display device

Abstract

The invention provides a source driving circuit, a source driving method and a display device. The source drive circuit includes a delay controller for controlling the values ​​of bits n to m of the second data to be input after a delay time after the values ​​of bits 0 to m-1 of the second data are input to the level shifter The level shifter: make the level shift circuit first boost the first part of the second data as a high-voltage data signal, and the output terminal first drives the panel to the intermediate voltage corresponding to the gamma voltage of the second data according to the high-voltage data signal; After the delay time, the rest of the second data is boosted to synthesize a new high-voltage data signal, and the output terminal drives the panel to the gamma voltage corresponding to the second data according to the new high-voltage data signal; realizing time-sharing conversion of high-voltage data, reducing the cost The voltage drop and noise of the level shifting circuit make the output drive voltage segmented, reduce the peak current of the source drive circuit, improve the electromagnetic interference performance of the circuit, and effectively reduce the power supply noise level.

Description

technical field [0001] The present invention relates to the field of display driving, in particular to a source driving circuit, a source driving method and a display device. Background technique [0002] With the continuous development and progress of display technology, people's demand for display is also getting higher and higher. At present, the high-end display market pursues larger and larger display sizes, higher resolutions, and faster response times, all of which require the interface circuit of the display driver chip to have the ability to handle high data rates. However, the large panel load also requires the output stage driving circuit to have a large driving capability, which will bring about a large power supply noise. Moreover, when the level shifter converts the low voltage data signal to the high voltage data signal, and when the output buffer drives the panel load, a voltage drop occurs on the high voltage voltage, thereby reducing the EMI performance an...

AI Technical Summary

Problems solved by technology

However, the large panel load also requires the output stage driver circuit to have a large driving capability, which will bring large power supply noise

Also, when the level shifter converts the low-voltage data signal to the high-voltage data signal, and when the output buffer drives the panel load, there will be a voltage drop on the high voltage voltage, thereby degrading the electromagnetic interference performance and noise performance of the circuit

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