Source driver applied to TFT-LCD, drive circuit and drive method

Abstract

The invention provides a source driver applied to TFT-LCD. The source driver comprises a data register, a data latch, a digital to analog converter and an output buffer, wherein a first load pulse is supplied to the output buffer, so that the output buffer responds to a second edge, from a second level to a first level and closely following a first edge, of the first load pulse, and begins to output the greyscale voltages of odd numbered output ends to a corresponding TFT source; a second load pulse is supplied to the output buffer, so that the output buffer responds to a second edge, from a second level to a first level and closely following a first edge, of the second load pulse, and begins to output the greyscale voltages of even numbered output ends to a corresponding TFT source; at least the second edge of the first load pulse and the second edge of the second load pulse are asynchronous. The invention further provides a corresponding drive circuit and a drive method. The source driver, the drive circuit and the drive method can alleviate the adverse consequences arisen by excessive differences of two adjacent lines of data displayed.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a source driver, a driving circuit and a driving method for TFT-LCD. Background technique [0002] Thin film transistor liquid crystal displays (TFT-LCDs) are widely used in consumer electronic products such as televisions, computers, mobile phones and the like. In general, a TFT-LCD includes a liquid crystal panel having pixel units arranged in a matrix, wherein a driving circuit is provided to drive a display function of the pixel units. [0003] figure 1 A circuit block diagram of a typical TFT-LCD is schematically illustrated. refer to figure 1 , The TFT-LCD device includes a liquid crystal panel with m×n pixel units arranged in a matrix, m source lines (also called data lines) S1 to Sm crossing each other and n gate lines G1 to Gn and set Thin film transistors at intersections of data lines and gate lines, source drivers for supplying data to the data line...

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to avoid the insufficient loading capacity of the source driver and / or bad display effects such as artifacts and crosstalk caused by the large difference between the display data of two adjacent rows.

Images