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Pohang, South Korea

Kang S.-W.,Chonbuk National University | Choi Y.E.,Chonbuk National University | Lee B.H.,Chonbuk National University | Lee J.H.,Chonbuk National University | And 6 more authors.
Liquid Crystals | Year: 2014

In-plane field driven vertical alignment device using a liquid crystal with positive dielectric anisotropy has been studied. In the device, the distance between inter-digital electrodes needs to be increased to achieve higher transmittance; however, such a design results in an increase in operating voltage and slower response time. In this work, we use polymer stabilisation technique, which generates surface tilt angle other than 90o, to improve upon these drawbacks. As a result, the proposed device shows lower operating voltage and faster response time while keeping transmittance at the same level, compared to those prior to polymer stabilisation. © 2013 © 2013 Taylor & Francis. Source


Lim S.H.,Chonbuk National University | Kim D.H.,Chonbuk National University | Shin S.J.,Chonbuk National University | Woo W.C.,Chonbuk National University | And 4 more authors.
49th Annual SID Symposium, Seminar, and Exhibition 2011, Display Week 2011 | Year: 2011

We propose surface polymer-stabilized in-plane field driven vertical alignment device using a liquid crystal with positive dielectric anisotropy. The device requires long distance between electrodes to achieve higher transmittance, however, such a design results in increase in operating voltage and slow response time. Forming surface pretilt angle with utilization of polymer stabilization technique, operating voltage is reduced and response time is greatly improved even with long electrode distance. Source


Lee S.H.,Chonbuk National University | Bhattacharyya S.S.,Chonbuk National University | Jin H.S.,Chonbuk National University | Jin H.S.,Poseung Technical Center | Jeong K.-U.,Chonbuk National University
Journal of Materials Chemistry | Year: 2012

Mobile liquid crystal displays (LCDs), often playing a role in hand-held computers, have become indispensable electronic tools to human beings in modern society. Innovative technological developments in the devices and materials have paved a successful road toward the development of mobile LCDs. Herein, after reviewing the trends and performance requirements of mobile LCDs, organic-inorganic materials as the key components of high performance mobile LCDs are addressed. Additionally, the developing trends in mobile LCDs are discussed with respect to these materials. © 2012 The Royal Society of Chemistry. Source


Lim S.H.,Chonbuk National University | Kim D.H.,Chonbuk National University | Shin S.J.,Chonbuk National University | Woo W.C.,Chonbuk National University | And 5 more authors.
Digest of Technical Papers - SID International Symposium | Year: 2011

We propose surface polymer-stabilized plane field driveen vertical alignment device using a liquid crystal with positive dielectric anisotropy. The device requires long distance between electrodes to achieve higher transmittance, however, such a design results in increase in operating voltage and slow response time Forming surface pretilt angle with utilization of polymer stabilization technique, operating voltage is reduced and response Time is greatly improved even with long electrode distance. © 2011 SID. Source


Goulding M.,University of Southampton | Smith N.,University of Southampton | Farrand L.,University of Southampton | Topping C.,University of Southampton | And 5 more authors.
Digest of Technical Papers - SID International Symposium | Year: 2015

Electrophoretic-based (EP) technology is a leading option for black & white reflective display media, notably for e-Readers. There is great future potential to extend electrophoretic and other colloidal dispersion based displays into a range of new application fields, such as digital signage, wearable displays and "smart windows". These new applications require novel particle and fluid concepts, which present many materials design challenges; especially bright colour, image stability and ultra low power consumption. The paper will discuss the state of the art and present new materials for a range of pixel architectures. © 2015 SID. Source

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