Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


Jacob_Huff_Thesis_2022.pdf (3.95 MB)

ETD Abstract Container

Abstract Header

Energy Recovery Circuits and Cell Characterization for Liquid Crystal Cells

Huff, Jacob Thomas
http://orcid.org/0000-0001-8722-2244
http://rave.ohiolink.edu/etdc/view?acc_num=miami1653833975947877

Abstract Details

2022, Master of Science, Miami University, Computational Science and Engineering.
Smart glass products use liquid crystal (LC) cells to combat drastic changes in incoming light. These cells switch from transparent to opaque with the application of an AC voltage. Existing LC cell drivers do not recover energy, and this is problematic for low-power applications that use batteries. This work presents two energy recovery circuits (ERCs) to extend a smart glass product’s runtime. Using an underdamped, series resonant circuit, the ERCs recover energy stored in the LC cell. To test the ERCs, two PCBs were designed: one for ERC I and one for ERC II. ERC I results reveal that 95% of the energy stored in a cell is recovered and returned to the battery. However, the narrow output voltage pulses of ERC I cannot turn an LC cell opaque. ERC II addresses this issue by generating wide voltage pulses. Experimental results for ERC II reveal that 91% of the energy stored in a cell is recovered and returned to the battery. Additionally, a study of an LC cell’s electrical characterization reveals a linear relationship between a cell’s area and its capacitance. Experimental results reveal that a parallel combination of a capacitor and resistor effectively models an LC cell.
Mark Scott (Advisor)
Miao Wang (Committee Member)
Dmitriy Garmatyuk (Committee Member)
90 p.
Electrical Engineering
Energy recovery circuit; LC cell

Recommended Citations

Citations

  • Huff, J. T. (2022). Energy Recovery Circuits and Cell Characterization for Liquid Crystal Cells [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1653833975947877

    APA Style (7th edition)

  • Huff, Jacob. Energy Recovery Circuits and Cell Characterization for Liquid Crystal Cells. 2022. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1653833975947877.

    MLA Style (8th edition)

  • Huff, Jacob. "Energy Recovery Circuits and Cell Characterization for Liquid Crystal Cells." Master's thesis, Miami University, 2022. http://rave.ohiolink.edu/etdc/view?acc_num=miami1653833975947877

    Chicago Manual of Style (17th edition)

miami1653833975947877
71
© 2022, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.