Multi-time-series generation circuit and liquid crystal display

Abstract

The embodiment of the invention discloses a multi-time-series generation circuit and a liquid crystal display. The multi-time-series generation circuit can comprise a PWM chip, N voltage input ends, N voltage output ends, N switching circuits and N delaying circuits, wherein N is an integer larger than or equal to 2. The PWM chip comprises N PWM output pins. Each PWM output pin is connected with the corresponding switching circuit and the corresponding delaying circuit so that the closing time series of at least N switching circuits can be controlled respectively. The N switching circuits are connected with the N voltage input ends and the N voltage output ends respectively. When at least one of the N switching circuits is closed, the voltages of the voltage input ends connected with the switching circuits are transmitted to the voltage output ends connected with the switching circuits through the switching circuits. By the adoption of the multi-time-series generation circuit and the liquid crystal display, multiple time series signals can be generated through one PWM chip, the occupied area of the multi-time-series generation circuit on a circuit board can be reduced, and the cost of the multi-time-series generation circuit is reduced.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a multi-sequence generating circuit and a liquid crystal display. Background technique [0002] One of the most common displays on the market today is the liquid crystal display. When the liquid crystal display is working, the scanning drive circuit controls the opening or closing of each pixel point, and the data drive circuit transmits video data to the pixel point that is turned on, so as to display the image. The working timing of the scan driving circuit and the data driving circuit is provided by the timing control circuit TCON. The TCON generates the working timing of the data driving circuit and the scanning driving circuit according to the timing of the input voltage. Usually the timing of the input voltage of TCON is controlled by the PWM chip. [0003] In the prior art, in addition to the input voltage of a specific timing for TCON, other circuits in the liquid cry...

AI Technical Summary

Problems solved by technology

Although the PWM chip has multiple output pins and can output multiple voltages, a PWM chip can only output fixed timing voltages, which cannot meet the timing requirements of different circuits in the LCD.

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