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POLYMER STABILIZED AND FLEXOELECTRIC ULTRAFAST LIQUID CRYSTAL DISPLAY

Zhou, Xiaochen
http://rave.ohiolink.edu/etdc/view?acc_num=kent1511722418498324

Abstract Details

2017, PHD, Kent State University, College of Arts and Sciences / Chemical Physics.
This dissertation focusses liquid crystal display applications which are the most successful market in liquid crystal applications. I studied, characterized, tested and simulated the various liquid crystal modes, mechanism and electro-optical performance. The results and data obtained in the dissertation can be a great help for a deeper research. Moreover, it would be a study base and may broaden the thinking vision for future display applications and improvement. In chapter 2, I systemtically studied the impact factors of the polymer stabilized IPS and FFS display. The electro-optical property was measured by comparing the groups of the monomers and curing conditions such as the structure of the monomer, concentration of the monomer, curing temperature and UV intensity. A very high contrast ratio was achieved in our study. In chapter 3, I demonstrated a single cell gap transflective display in FFS mode. First, a new scheme was developed by the two-step polymerization method. Then a technique of high resolution polymerization was studied to achieve a good process result. I measured the optical performance of the transflective display. I also figured out a method to compensate the transflective display both therotically and experimentally. The transflective display is compatible to current manufacture processes. In chapter 4, I present a novel reversed optical bend display for fast response application. Inspired by the well-known pi cell, we developed a reversed pi cell using negative dielectric anisotropic liquid crystal. I studied the liquid crystal deformation transitions in the proposed cell gemotry. I experiemtally observed the transition and numerically verified the phenomenon. I used the polymeriztion method to stabilize the desired state in which the liquid crystal can be swtiched at high speed. Chapter 5 is dedicated to the flexoelectric effect and its display application. A recent new material-liquid crystal dimer has been found to have a large flexoelectric coefficient. We enabled a new application with the dimer materials. In the hybrid cell, the spontaneous deformation and polarization existed. The horizontal electric field was coupled with the polarization to rotate the liquid crystal director. I studied this mode and tested the static and dynamic behavior. In the chapter 6, the flexoelectric effect in the cholesteric liquid crystal was studied. I used patterned grooves on the cell surface to stabilize the uniform lying helix structure. With the proposed material and new method, we can dramatically reduce the driving voltage for the cholesteric flexoelecric display.
Deng-Ke Yang (Advisor)
164 p.
Physics; Polymers

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Citations

  • Zhou, X. (2017). POLYMER STABILIZED AND FLEXOELECTRIC ULTRAFAST LIQUID CRYSTAL DISPLAY [Doctoral dissertation, Kent State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=kent1511722418498324

    APA Style (7th edition)

  • Zhou, Xiaochen. POLYMER STABILIZED AND FLEXOELECTRIC ULTRAFAST LIQUID CRYSTAL DISPLAY. 2017. Kent State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=kent1511722418498324.

    MLA Style (8th edition)

  • Zhou, Xiaochen. "POLYMER STABILIZED AND FLEXOELECTRIC ULTRAFAST LIQUID CRYSTAL DISPLAY." Doctoral dissertation, Kent State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=kent1511722418498324

    Chicago Manual of Style (17th edition)

kent1511722418498324
408
© 2017, some rights reserved.Creative Commons License POLYMER STABILIZED AND FLEXOELECTRIC ULTRAFAST LIQUID CRYSTAL DISPLAY by Xiaochen Zhou is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Kent State University and OhioLINK.