Low Voltage and High Transmittance Blue Phase Liquid Crystal Displays with 2D/3D Continuous Electrode Structures
| Autor: | Jen-Hao Kuo, 郭人豪 |
|---|---|
| Rok vydání: | 2018 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 Blue phase liquid crystal display is a popular research topic for the liquid crystal display. Because of its sub-millisecond response time and its display without alignment layer that make it be fabricated easier. However, the primary problems of blue phase liquid crystal are low transmittance and high operating voltage. Many theses aim to design different electrode structures to improve the high operating voltage and low transmittance. Most theses aim to design two-dimension electrode structures about parameters on X-Z direction. Therefore, we design the three-dimension electrode structures and hope that new structures can reduce the dead zone on y-direction. At first, we refer to three kinds of 2D electrode structures to design three kinds of 3D electrode structures. We discover that 3D electrodes have the problem of central dead zone and the problem influence the transmittance of the display. After the analysis, the 2D electrodes still have the highest transmittance. However, 3D electrodes also have their advantage. 3D electrodes have higher transmittance at low operating voltage if the electrode gap is small. Then we refer to Diamond-shape electrodes to design continuous electrodes to reduce the central dead zone on expectation so we compare continuous electrodes with Diamond-shape electrodes first. The result is that the pointed diamond electrodes have higher transmittance in comparison with Diamond-shape electrodes generally ( ). The enhanced Diamond electrodes have higher transmittance and lower operation voltage in comparison with Diamond-shape electrodes. In the end, we compare continuous electrodes with 2D and 3D electrodes. Among 2D, 3D triangle and pointed diamond electrodes, 2D triangle electrodes have the highest transmittance with large gap but 3D triangle electrodes have the higher transmittance at low voltage with small gap. Pointed diamond electrodes have high transmittance over 75% with most electrode gaps. Among 2D, 3D enhanced trapezoid and enhanced diamond electrodes, 2D enhanced trapezoid electrodes have the highest transmittance with large gap but 3D enhanced trapezoid electrodes have the higher transmittance at low voltage with small gap. Enhanced diamond electrodes have high transmittance over 80% with most electrode gaps. In terms of transmittance vs electrode gaps, continuous electrodes combine the features of 2D and 3D electrodes. Continuous electrodes have less sensitivity on electrode gaps compared to 2D and 3D electrodes with reasonably high transmittance. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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