Chinese Journal of Liquid Crystals and Displays, Volume. 37, Issue 12, 1572(2022)

Design of low-cost drive circuit for passive liquid crystal optical device

Mei-rui CHEN1, Ying DU1, Hong-min MAO1, Jian-tao PENG2, Hui-juan SUN3, Guo-ding XU1, Huan-jun LU1、*, and Zhao-liang CAO1、**
Author Affiliations
  • 1Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application,School of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou 215009,China
  • 2Shanghai Institute of Satellite Engineering,China Aerospace Science and Technology Corporation,Shanghai 201109,China
  • 3Institute of Mathematics and Physics,Beijing Union University,Beijing 100101,China
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    In order to realize the driving of multi-channel passive liquid crystal optical devices, the driving circuit with low cost, low complexity and adjustable amplitude and frequency is designed and developed. Firstly, to facilitate the control of the liquid crystal device, the USB data transmission method is used to transmit the control signal between the PC and the driver board. Secondly, the driver board adopts the combination of the mother board and daughter board, and each daughter board can output 32 driving signals, which can flexibly select the number of daughter board according to actual needs, thereby reducing the cost. The mother board and the daughter board both use STM32 as the main control chip, and the daughter board communicates with the mother board through the SPI interface. Each daughter board distributes data packets to the DAC chip through 2 SPI interfaces, and each DAC chip can control 16 channels of digital-to-analog conversion, realize the output of 192 channels of analog signals eventually. Finally, the board is made and tested. The results show that the output analog voltage is in linear proportional relationship to the gray value, and its absolute error is about 0.010 V, which is in line with the modulation accuracy of 10 bit, 1 024-level voltage gray value. The driver board can realize the output of multi-channel driving signals and meet the requirements of driving control of multi-channel passive liquid crystal optical devices.

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    Mei-rui CHEN, Ying DU, Hong-min MAO, Jian-tao PENG, Hui-juan SUN, Guo-ding XU, Huan-jun LU, Zhao-liang CAO. Design of low-cost drive circuit for passive liquid crystal optical device[J]. Chinese Journal of Liquid Crystals and Displays, 2022, 37(12): 1572

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    Paper Information

    Category: Research Articles

    Received: Aug. 13, 2022

    Accepted: --

    Published Online: Nov. 30, 2022

    The Author Email: Huan-jun LU (caozl@usts.edu.cn), Zhao-liang CAO (luhuanjun@usts.edu.cn)

    DOI:10.37188/CJLCD.2022-0266

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