Full-high-definition liquid crystal array drive circuit

Abstract

The invention discloses a full-high-definition liquid crystal array drive circuit which comprises an FPGA module, an adjustable positive and negative power module, an ADG3123 signal conversion module and a high-voltage expansion module. The drive circuit can generate multiple paths of full-high-definition liquid crystal array high-speed drive signals independent in timing sequence at the same time, the voltage range of the signals is wide, high current output capacity is achieved, positive and negative voltages of all the signals change synchronously, amplitudes of the positive and negative voltages can be adjusted independently and continuously in real time, the number of elements is decreased remarkably, hardware cost is lowered, and the integration level and reliability are improved.

Description

technical field [0001] The present invention relates to a liquid crystal driving circuit, more particularly, to a full high-definition liquid crystal array driving circuit. Background technique [0002] TFT liquid crystal array, after pouring liquid crystal, need to provide signal from the outside, directly drive the liquid crystal array action, display different pictures, in order to detect whether the liquid crystal array is working normally, the liquid crystal array with the detection result is normal, will bond the external drive IC , and assemble backlight and other components to make a finished LCD screen. [0003] The full high-definition (FHD, 1920*1080 resolution) liquid crystal array, due to its own characteristics, adds many requirements to the driving signal on the basis of the existing liquid crystal array driving signal: 1) There are many signal channels, some close to 30 All signals are analog signals, 2) The signal waveform changes in real time with time, an...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low output signal timing accuracy, inconvenient signal channel expansion, narrow signal voltage range, complex circuit and high hardware cost in the prior art, the present invention provides a high-voltage high-speed drive circuit that meets the requirements of full-high-definition liquid crystal array detection. Improve the signal timing accuracy, facilitate the expansion of the number of output signal channels, greatly expand the output signal voltage range, can greatly reduce the number of high-speed DAC digital-to-analog conversion chips, and significantly reduce production costs

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