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7 March 2016 Liquid crystal light shutters for simultaneous control of haze and transmittance
Tae-Hoon Yoon, Joon Heo, Byeong-Hun Yu, Jae-Won Huh
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Proceedings Volume 9769, Emerging Liquid Crystal Technologies XI; 97690W (2016) https://doi.org/10.1117/12.2211859
Event: SPIE OPTO, 2016, San Francisco, California, United States
Abstract
Recently, see-through displays have been attracted much attention as next-generation displays. There are two basic technologies by which we can realize a see-through display: organic light-emitting diodes (OLEDs) and liquid crystal (LC) displays. The pixel structure of a see-through display includes a transparent window area through which the background image can be seen. Therefore, background images are always seen along with the displayed image. In addition, a see-through display using OLEDs cannot provide the black color. As a result, a see-thorough display exhibits poor visibility. This inevitable problem can be solved by placing a light shutter at the back of a see-through display. Light shutter technology can be divided into two types; light absorption and light scattering. Light shutter based on light absorption can be used to control the transmittance, but it cannot block the object behind the display panel completely. Light shutters based on light scattering can be used to control the haze, but it cannot provide black color. To realize a high-visibility see-through display, we need a light shutter by which we can control haze and transmittance simultaneously. In this talk we would like to introduce technologies for LC light shutters by which we can block the background image and provide black color by utilizing light scattering and absorption effects simultaneously.
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Tae-Hoon Yoon, Joon Heo, Byeong-Hun Yu, and Jae-Won Huh "Liquid crystal light shutters for simultaneous control of haze and transmittance", Proc. SPIE 9769, Emerging Liquid Crystal Technologies XI, 97690W (7 March 2016); https://doi.org/10.1117/12.2211859
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KEYWORDS
Light scattering
Absorption
Liquid crystals
LCDs
Electrodes
Opacity
Organic light emitting diodes
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