Eun-Young Jeon

Pusan National University

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Tae‐Hoon Yoon

Seoul National University

Ki-Han Kim

Konkuk University

Dong Han Song

Northwestern Polytechnical University

Ki‐Chul Shin

Gyeongju National Museum

Hee Seop Kim

Sungshin Women's University

Byung Wok Park

Pusan National University

Ji-Hoon Lee

Jeonbuk National University

Gak Seok Lee

Samsung (South Korea)

Hoon Kim

Electronics and Telecommunications Research Institute

Sun‐Wook Choi

Naver (South Korea)

Cooperative Institutions

Pusan National University

Samsung (South Korea)

Pohang University of Science and Technology

Seoul National University

Naver (South Korea)

Inha University

Chungbuk National University

Hanil General Hospital

Gwangju Institute of Science and Technology

Hanyang University

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Pixel electrode structure for high transmittance in a multi-domain vertical alignment liquid crystal display device

Journal of Physics D Applied Physics (2012)

Ki-Han Kim Eun-Young Jeon Byung Wok Park Dong Han Song Ji-Hoon Lee

Abstract We propose a pixel electrode structure for the multi-domain vertical alignment liquid crystal mode with high optical efficiency. We form a micro-slit electrode structure on the top substrate to reduce the width of disclination lines at domain boundaries. We insert additional electrodes on the bottom substrate to improve the transmittance at the edges of each pixel. We confirm that using both structures, the transmittance can be increased from 22.9% to 27.3% with no change in the operating voltage.

Disclination

10.1088/0022-3727/45/6/065103

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Citations (18)

High transmittance pixel structure for the multidomain vertical alignment mode

26th Optoelectronics and Communications Conference (2012)

Byung Wok Park Ki-Han Kim Eun-Young Jeon Dong Han Song Hoon Kim

We propose a new pixel structure to improve the transmittance at the pixel boundaries. By forming additional electrodes at the pixel boundaries, LCs at the pixel boundaries can be aligned to 45° against the transmission axes (TA) of the polarizers for high transmittance.

Polarizer

10.1109/oecc.2012.6276377

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Citations (0)

Pixel structure for higher optical efficiency in the patterned vertical alignment LC mode

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2012)

Byung Wok Park Eun-Young Jeon Ki-Han Kim Dong Han Song Ji-Hoon Lee

In this paper, we propose new pixel structures for high transmittance in the patterned vertical alignment mode. We formed the protrusion or the slit on the top substrate to reduce the width of disclination lines at the domain boundaries.

Disclination

Mode (computer interface)

10.1117/12.913569

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Citations (1)

Single cell-gap transflective liquid crystal device created by controlling the pretilt angle using a liquid crystalline reactive monomer

Optics Express (2011)

Eun-Young Jeon Ki-Han Kim Ji-Hoon Lee Tae‐Hoon Yoon

We present a single cell-gap transflective liquid crystal (LC) device using a homogeneous alignment polyimide (H-PI) mixed with a liquid crystalline reactive monomer that is able to vertically align the LC. We obtain two different pretilt angles in each pixel through the region by region control of the UV exposure time. The smaller pretilt angle is used to obtain a half-wave phase retardation for the transmissive part, whereas the larger pretilt angle is used to obtain a quarter-wave phase retardation for the reflective part.

10.1364/oe.19.025617

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Citations (7)

High-transmittance Multi-domain Vertical Alignment Liquid Crystal Device with Protrusion Structure

Journal of the Optical Society of Korea (2012)

Ki-Han Kim Eun-Young Jeon Byung Wok Park Sun‐Wook Choi Dong Han Song

We propose a high-transmittance multi-domain vertical alignment liquid crystal device with a protrusion structure. Disclination lines, which inevitably appear at the boundaries of domains in a multi-domain structure, can be reduced by adding a protrusion structure on the top substrate. The transmittance was improved by 11% using the proposed structure with no change of either the dark state or the operating voltage.

Disclination

10.3807/josk.2012.16.2.166

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Citations (13)