Research On Driving And Controlling Circuit Of Liquid Crystal Lens

Liquid crystal lens has been paid much attention by many researchers at home and abroad since its introduction in 1979.Based on the photoelectric properties of the liquid crystal material,the refractive index of the liquid crystal material can be changed by controlling the spatial electric field distribution without changing the shape of the liquid crystal material when it is applied to the lens,and the adjustment of its optical properties can be realized.Compared with the traditional zoom lens,the liquid crystal lens has the advantages of small size,flexible zoom,no mechanical wear and so on.It has great application potential in many fields such as optical imaging,optoelectronic system,biomedical and so on.Control of space electric field distribution is the key to adjust the optical performance liquid crystal lens,the space electric field based on liquid crystal lens demands of physical properties,has a wide scope of liquid crystal lens is designed to drive and control circuit,its drive and control circuit output signals can be within the scope of the preset to control voltage RMS,polarity switching frequency,And the number of independent signal output can be controlled.The main research work of this paper is as follows:First,understand the study of liquid crystal lens research background,development course and optical properties of liquid crystal,analysis summary single power supply,power supply and power drive system,three different liquid crystal lens array principle,performance characteristics and drive demand,and compared the existing drive parameters of liquid crystal lens,Finally,the demand of the LC lens driving and controlling circuit is analyzed and determined.Second,according to certain requirements,drive and control circuit of LC lens system study and design,the implementation of the scheme according to the functional refinement into power,control,signal,signal processing,signal acquisition,data communication and signal extension modules.The design and verification are carried out for different functional modules respectively.Positive and negative power supply is realized by inverting voltage boost,signal generating circuit module is built by digital-to-analog converter,signal generating circuit module is amplified by differential amplifier circuit,and the number of signal output channels is expanded by multi-channel analog switch.After the completion of the system hardware circuit design work,the system hardware circuit production,based on its hardware circuit platform to complete the system transplant and functional code design work.Data communication between Bluetooth and the system can realize the regulation of voltage RMS,polarity switching frequency and the number of independent signal output channels.In the end,the power of the control and drive circuit of LC lens system,electrical performance test,electrical performance test including the system output signal amplitude,frequency range,RMS and test waveforms.In this paper,the design and production of liquid crystal lens drive and control circuit for liquid crystal lens with wider range of drive demand,the circuit is support 1 ? 128 arbitrary ways on signal output,and output the highest frequency of 1 road can be up to 25 k HZ,frequency of 1 k HZ up to 80 of the road when the signal output.At the same time,the design also has the characteristics of miniaturization,modularization and low power consumption.