浮接電極應用於高分子藍相液晶顯示器之效應研究

Effects of floating electrode on the Polymer-Stabilized Blue-Phase Liquid Crystal Displays

張育銓(Yu-Chuan Chang)

指導教授 ： 蔡永傑

國立臺灣大學/電機資訊學院/光電工程學研究所/碩士(2015年)

https://doi.org/10.6342/NTU.2015.11110

摘要

無資料

關鍵字

藍相液晶 ； 浮接電極 ； TechWiz ； 分散式浮接電極 ； Matlab

並列摘要

By placing a floating electrode on the upper substrate, it has been found to be very helpful in modifying the electric field profile in a Polymer Stabilized Blue Phase Liquid Crystal (PS-BPLC) cell such that the overall transmission can be increased. A major advantage of floating electrode is that it doesn’t require application of a driving voltage and hence no extra TFT is required and it is very convenient and low cost.

We will investigate and report the results on the effects of floating electrode on PS-BPLC with different electrode shapes, dimensions and material constants such as Kerr constants. We also further investigate the effects on electric fields with different shapes and dimensions of floating electrode. These can all affect the electric field distribution profile and hence PS-BPLC transmission and operation voltage. Our preliminary results show that the floating electrode can indeed improve the overall transmission of the PS-BPLC displays quite remarkably by decreasing the “dead zone” areas.

A brand new design of floating electrode is proposed, we call it “distributed floating electrode” design. This new design requires less transparent electrode area, lower operation voltage while maintaining similar transmittance as in tradition floating electrode design. Moreover, this new design also has the potential of reducing the image sticking problem that may be caused by the traditional floating design and may allow higher transmission due to less transparent electrode area.

In addition, we use Matlab to scan electric field in whole region along z-direction, visualize the electric field distribution in 3D diagram of every structure. The designs and computer simulations were carried out using a commercially available LCD modeling software 3D Techwiz (Sanayi System) from Korea.

並列關鍵字

Blue-Phase liquid crystal ； floating electrode ； Techwiz ； distributed floating electrode ； Matlab

參考文獻

[1]Belyakov, V. A., and Vladimir E. Dmitrienko. "The blue phase of liquid crystals."Soviet Physics Uspekhi 28.7 (1985): 535.

[2]H. –S. Kitzerow and C. Bahr, Chirality in Liquid Crystals (Springer, New York, 2001).

[3]Kitzerow, Heinz-Siegfried. "Blue phases come of age: a review." SPIE OPTO: Integrated Optoelectronic Devices. International Society for Optics and Photonics, 2009.

[4]Rao, Linghui, et al. "Low voltage blue-phase liquid crystal displays." Applied Physics Letters 95.23 (2009): 231101.

[5]Kitzerow, Heinz, and Christian Bahr. Chirality in liquid crystals. Springer Science Business Media, 2001.