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13:30 - 14:00
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Paper No. 2014-Thu-S0701-I005
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Invited Speaker:
Liang-Chy Chien
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Liquid crystal alignment on polymerized surfaces
Liang-Chy Chien,
A method of improving the response time of vertical or in-plane alignment liquid crystal device using surface polymer stabilization augmented surface anchoring is introduced. A minute amount of a reactive monomer and photo-initiator is mixed with a nematic liquid crystal host and the mixture is
polymerized under UV light to form sub-micron sized polymer protrusions on the two substrates of the cell. Experimental evidence proves that polymer-stabilized liquid crystal alignment minimizing the light leakage problem and maximizing light transmission. In addition, the surface polymer stabilized cells provide very small but well-defined pretilt angle which results in a fast turn-on time and the fine structure of polymer protrusions gives a larger polar or azimuthal anchoring energy which reduces the turn off time. This presentation will discuss two types of polymerized surfaces for homeotropic and planar liquid crystal alignments.
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14:00 - 14:15
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Paper No. 2014-Thu-S0701-O009
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| G. J. Lin
Award Candidate
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Enhanced Electro-Optical Performance of In-Plane Switching Vertically Aligned Liquid Crystal Devices Using Surface Polymer Stabilized Networks
G. J. Lin,T. J. Chen,B. Y. Chen,Y. T. Lin,Y. W. Tsai,J. J. Wu,Y. J. Yang,
The surface polymer stabilized networks (SPSNs) are employed in the in-plane switching vertically aligned (IPS-VA) liquid crystal (LC) devices to investigate their electro-optical properties. With this stronger anchoring effect, the black and white switching responses are significantly improved, and the polar viewing angle is more symmetric.
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14:15 - 14:30
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Paper No. 2014-Thu-S0701-O010
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| Cheng-Chang Li
Award Candidate
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Light-activated binary π phase modulator based on twisted nematic liquid crystal
Cheng-Chang Li,Chun-Wei Chen,Hung-Chang Jau,Chun-Hong Lee,Chun-Ta Wang,Tsung-Hsien Lin,
This work demonstrated an optically tunable bistable phase switching, exploiting the conversion between left-handed and right-handed twisted nematic liquid crystals. Theoretical and experimental analyses revealed that the handedness inversion of the twisted nematic film altered the optical phase of the output waves by π. Herein, the competition between the helical twisting powers of the two reverse-handed chiral dopants determines the handedness of the twisted nematic film. Owing to the azobenzene chromophores dopants, this film are bistable and can be light driven between two reverse-handed twisted nematic liquid crystal film.
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14:30 - 14:45
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Paper No. 2014-Thu-S0701-O023
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| Bo-Yu Ciou,
Award Candidate
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Temperature Dependent Random lasing behavior of dye-doped liquid crystals in single core capillary
Bo-Yu Ciou,,Ying-Li Hsiao,Ja-Hon Lin,
Random lasing characteristics from infilling of dye-doped nematic liquid crystals (DD-NLCs) into single core capillaries was investigated at different temperature. As the temperature variation, the intensity and the linewidth of the emission spikes would be varied that was attributed the alignment and birefringence of the LCs.
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14:45 - 15:00
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Paper No. 2014-Thu-S0701-O024
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| Yu-Yi Chien
Award Candidate
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Eliciting Steady-State Visual Evoked Potentials by Different Disparity in 3D Displays
Yu-Yi Chien,Chia-Ying Lee,Fang-Cheng Lin,Yi-Pai Huang,JohnK. Zao,Han-PingD. Shieh,
We combine brain-computer interfaces (BCIs) and 3D displays, since 3D displays provide images with more information. The purpose is to investigate steady-state visual evoked potentials (SSVEPs) of the stereoscopic stimulation in different disparity. The results showed a significant difference between disparity angles, and the signal-to-noise ratio (SNR) of small angles is higher.
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