Bistable Twisted Nematic LCD with Permanent Grayscales and Fast Switching

K.W. Ng; Hoi Sing Kwok; Zhiguo Meng; Benzhong Tang; Man Wong

doi:10.1889/1.1831837

Bistable Twisted Nematic LCD with Permanent Grayscales and Fast Switching

K.W. Ng, Hoi Sing Kwok, Zhiguo Meng, Benzhong Tang, Man Wong

The Hong Kong University of Science and Technology

Research output: Contribution to conference › Conference Paper

Abstract

Permanent grayscales in a π bistable twisted nematic liquid crystal display have been demonstrated. This display can be switched between −22.5° and 157.5° twist states by means of a combination of strong in-plane electric fields and vertical electric field for creating both the planar anchoring breaking and an electro-hydrodynamic flow. The switching of the twist states during the Frederiks transition is sufficiently inhomogeneous such that domains of −22.5° twisted and 157.5° twisted states are formed. The ratio of these domains can be controlled by the vertical electric field. Fast switching of 1 ms was achieved for gray scales. These grayscales have very long lifetime.

Original language	English
Pages	228-231
DOIs	https://doi.org/10.1889/1.1831837
Publication status	Published - Jun 2001
Event	SID Symposium Digest of Technical Papers - Duration: 1 Jun 2001 → 1 Jun 2001

Conference

Conference	SID Symposium Digest of Technical Papers
Period	1/06/01 → 1/06/01

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10.1889/1.1831837

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title = "Bistable Twisted Nematic LCD with Permanent Grayscales and Fast Switching",

abstract = "Permanent grayscales in a π bistable twisted nematic liquid crystal display have been demonstrated. This display can be switched between −22.5° and 157.5° twist states by means of a combination of strong in-plane electric fields and vertical electric field for creating both the planar anchoring breaking and an electro-hydrodynamic flow. The switching of the twist states during the Frederiks transition is sufficiently inhomogeneous such that domains of −22.5° twisted and 157.5° twisted states are formed. The ratio of these domains can be controlled by the vertical electric field. Fast switching of 1 ms was achieved for gray scales. These grayscales have very long lifetime.",

author = "K.W. Ng and Kwok, \{Hoi Sing\} and Zhiguo Meng and Benzhong Tang and Man Wong",

year = "2001",

month = jun,

doi = "10.1889/1.1831837",

language = "English",

pages = "228--231",

note = "SID Symposium Digest of Technical Papers ; Conference date: 01-06-2001 Through 01-06-2001",

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TY - CONF

T1 - Bistable Twisted Nematic LCD with Permanent Grayscales and Fast Switching

AU - Ng, K.W.

AU - Kwok, Hoi Sing

AU - Meng, Zhiguo

AU - Tang, Benzhong

AU - Wong, Man

PY - 2001/6

Y1 - 2001/6

N2 - Permanent grayscales in a π bistable twisted nematic liquid crystal display have been demonstrated. This display can be switched between −22.5° and 157.5° twist states by means of a combination of strong in-plane electric fields and vertical electric field for creating both the planar anchoring breaking and an electro-hydrodynamic flow. The switching of the twist states during the Frederiks transition is sufficiently inhomogeneous such that domains of −22.5° twisted and 157.5° twisted states are formed. The ratio of these domains can be controlled by the vertical electric field. Fast switching of 1 ms was achieved for gray scales. These grayscales have very long lifetime.

AB - Permanent grayscales in a π bistable twisted nematic liquid crystal display have been demonstrated. This display can be switched between −22.5° and 157.5° twist states by means of a combination of strong in-plane electric fields and vertical electric field for creating both the planar anchoring breaking and an electro-hydrodynamic flow. The switching of the twist states during the Frederiks transition is sufficiently inhomogeneous such that domains of −22.5° twisted and 157.5° twisted states are formed. The ratio of these domains can be controlled by the vertical electric field. Fast switching of 1 ms was achieved for gray scales. These grayscales have very long lifetime.

UR - https://openalex.org/W2111115909

U2 - 10.1889/1.1831837

DO - 10.1889/1.1831837

M3 - Conference Paper

SP - 228

EP - 231

T2 - SID Symposium Digest of Technical Papers

Y2 - 1 June 2001 through 1 June 2001

ER -

Bistable Twisted Nematic LCD with Permanent Grayscales and Fast Switching

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Conference

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