Reference voltage regulator in liquid crystal module

Abstract

The invention relates to a reference voltage regulator in a liquid crystal module, which comprises a shell, wherein an input interface and an output interface are arranged on the shell; and a single chip microcomputer, a crystal oscillator circuit, an LED display circuit, a digital-analog conversion circuit, a reference voltage generation circuit, a key circuit and an amplifying circuit are arranged in the shell. The reference voltage regulator in the liquid crystal module has the advantages of simple design idea and cost conservation.

Description

【Technical field】 [0001] The invention belongs to the field of liquid crystal displays, and specifically refers to a base-mounted voltage regulator in a liquid crystal module. 【Background technique】 [0002] Under the fixed screen, the liquid crystal molecules will be sluggish and aging due to the long-term electric field force. In order to prevent this phenomenon, it is necessary to apply an external AC electric field to make the liquid crystal molecules deflect symmetrically in a certain legal direction continuously in the entire panel. The voltage of the applied electric field corresponding to the legal direction is the reference voltage for liquid crystal molecule deflection. [0003] Due to the differences in the manufacturing process, the impedance and capacitive reactance of the internal circuits of each panel are different, so the reference voltage of each panel is also different, and it needs to be adjusted during the module manufacturing inspection to achieve the ...

AI Technical Summary

Problems solved by technology

[0006] 1. The DC-DC processing part is complicated, and the input 9V needs to be converted into 5V, 16V, 3.3V, etc.

In particular, the boost circuit is easily disturbed by the outside world, resulting in chip protection

[0007] 2. The control part adopts the combination design of FPGA and EPROM, the design idea is complicated, and the cost of FPGA is high

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