60‐3: High Contrast In‐plane Switching (IPS) Mode using Dichroic‐dye Liquid Crystal

Jo, Soo In; Yoon, Sang-Soon; Choi, Woo-Young; Lee, Joun-Ho; Jun, Myungchul

doi:10.1002/sdtp.11775

Symp Digest of Tech Papers

2017

DOI: 10.1002/sdtp.11775

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60‐3: High Contrast In‐plane Switching (IPS) Mode using Dichroic‐dye Liquid Crystal

Soo In Jo¹,

Sang-Soon Yoon²,

Woo-Young Choi³

et al.

Abstract: We propose a dual panel structure with dichroic dye mixed LC to increase a contrast ratio of IPS mode. Dichroic dyes act like a switchable polarizer and its contrast ratio is about 4: 1. Therefore, contrast ratio of panel is improved about 3.8 times and also off-axis light leakage is dramatically enhanced.

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Cited by 3 publications

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Fluorophobic Effect Promoting Lamellar Self‐Assembly of Donor Acceptor Dyes

et al. 2018

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To combine liquid crystalline and linear optical properties in the same molecule, the fluorophobic effect was probed for the first time in donor acceptor dyes. Thus, a series of mono-, bi-, and tricyclic donor acceptor dyes with 1H,1H-perfluorinated alkyl chains of different lengths as donor units and nitrile, malononitrile or barbiturate as acceptor units was synthesized in 5 steps and 1.4-6.6 % overall yield. UV/Vis and fluorescence spectroscopy, cyclic voltammetry and DFT calculations revealed that absorption and emission maxima, Stokes shifts and LUMO energies were mainly governed by the chromophore size and acceptor strengths. The perfluorinated chain was electronically almost decoupled from the remaining chromophore and induced only slight changes of the absorption maxima as compared to the alkyl substituted counterparts. However, in contrast to the non-mesomorphic alkyl donor-substituted derivatives, the perfluorinated donors resulted in self-assembly into partially interdigitated SmA bilayers according to differential scanning calorimetry (DSC), polarizing optical microscopy (POM), X-ray diffraction (WAXS, SAXS) studies and electron density profile calculations.

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Fluorophobic Effect Promoting Lamellar Self‐Assembly of Donor Acceptor Dyes

et al. 2018

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P‐162: Z‐Axis Polarizer for the Reduction of Panel Dark Light Leakage

Chang¹,

Kuo²

2019

Symp Digest of Tech Papers

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A Z-axis absorption film that can be integrated with a polarizer is proposed. The film provides different degrees of absorption for front and side views to solve the light leakage behavior of the IPS panel in a dark side view state. The front view brightness of the panel can be three times higher than the side view of the dark state, thereby effectively improving the light leakage of the IPS panel in the dark state of the large viewing angle.

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[Paper] Evaluation of Capability to Maintain Thickness of LC layer of Flexible LCDs with Bonding Polymer Spacers

Ishinabe

Takahashi

Shibata

et al. 2019

MTA

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60‐3: High Contrast In‐plane Switching (IPS) Mode using Dichroic‐dye Liquid Crystal

Cited by 3 publications

References 5 publications

Fluorophobic Effect Promoting Lamellar Self‐Assembly of Donor Acceptor Dyes

Fluorophobic Effect Promoting Lamellar Self‐Assembly of Donor Acceptor Dyes

P‐162: Z‐Axis Polarizer for the Reduction of Panel Dark Light Leakage

[Paper] Evaluation of Capability to Maintain Thickness of LC layer of Flexible LCDs with Bonding Polymer Spacers

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