Wide viewing angle and fast responding TN LCD

S. Chandrasekhar, V. N. Raja, S. Krishna Prasad, D. S Shankar Rao

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

A new type of TN display device has been fabricated by sandwiching a dual frequency addressable nematic liquid crystal material between two unrubbed polyimide coated glass plates. Between crossed polarizers, the bright state is observed by applying a high frequency electric field, while the dark state by applying a low frequency electric field of similar strength. This dual frequency addressed rubbing free device shows very wide and highly symmetric viewing angle characteristics, with contrast ratio comparable to that of a rubbed TN device, and with very fast response time. Addressing the device in a "dual frequency dual amplitude pulsed mode" leads to only a small increase (∼1.5 times) in power consumption in comparison with the conventional single frequency addressed device.

Original languageEnglish
JournalMolecular Crystals and Liquid Crystals
Volume410
DOIs
Publication statusPublished - 01-12-2004
Externally publishedYes
EventProceedings of the 19th International Liquid Crystal Conference, ILCC2002 - Edinburgh, United Kingdom
Duration: 30-06-200205-07-2002

Fingerprint

Liquid crystal displays
Electric fields
Nematic liquid crystals
Polyimides
Electric power utilization
Display devices
Glass
electric fields
display devices
polarizers
polyimides
liquid crystals
low frequencies
glass

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Chandrasekhar, S. ; Raja, V. N. ; Prasad, S. Krishna ; Rao, D. S Shankar. / Wide viewing angle and fast responding TN LCD. In: Molecular Crystals and Liquid Crystals. 2004 ; Vol. 410.
@article{aac222928d3d4bed9046f145f466d508,
title = "Wide viewing angle and fast responding TN LCD",
abstract = "A new type of TN display device has been fabricated by sandwiching a dual frequency addressable nematic liquid crystal material between two unrubbed polyimide coated glass plates. Between crossed polarizers, the bright state is observed by applying a high frequency electric field, while the dark state by applying a low frequency electric field of similar strength. This dual frequency addressed rubbing free device shows very wide and highly symmetric viewing angle characteristics, with contrast ratio comparable to that of a rubbed TN device, and with very fast response time. Addressing the device in a {"}dual frequency dual amplitude pulsed mode{"} leads to only a small increase (∼1.5 times) in power consumption in comparison with the conventional single frequency addressed device.",
author = "S. Chandrasekhar and Raja, {V. N.} and Prasad, {S. Krishna} and Rao, {D. S Shankar}",
year = "2004",
month = "12",
day = "1",
doi = "10.1080/15421400490433163",
language = "English",
volume = "410",
journal = "Molecular Crystals and Liquid Crystals",
issn = "1542-1406",
publisher = "Taylor and Francis Ltd.",

}

Wide viewing angle and fast responding TN LCD. / Chandrasekhar, S.; Raja, V. N.; Prasad, S. Krishna; Rao, D. S Shankar.

In: Molecular Crystals and Liquid Crystals, Vol. 410, 01.12.2004.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Wide viewing angle and fast responding TN LCD

AU - Chandrasekhar, S.

AU - Raja, V. N.

AU - Prasad, S. Krishna

AU - Rao, D. S Shankar

PY - 2004/12/1

Y1 - 2004/12/1

N2 - A new type of TN display device has been fabricated by sandwiching a dual frequency addressable nematic liquid crystal material between two unrubbed polyimide coated glass plates. Between crossed polarizers, the bright state is observed by applying a high frequency electric field, while the dark state by applying a low frequency electric field of similar strength. This dual frequency addressed rubbing free device shows very wide and highly symmetric viewing angle characteristics, with contrast ratio comparable to that of a rubbed TN device, and with very fast response time. Addressing the device in a "dual frequency dual amplitude pulsed mode" leads to only a small increase (∼1.5 times) in power consumption in comparison with the conventional single frequency addressed device.

AB - A new type of TN display device has been fabricated by sandwiching a dual frequency addressable nematic liquid crystal material between two unrubbed polyimide coated glass plates. Between crossed polarizers, the bright state is observed by applying a high frequency electric field, while the dark state by applying a low frequency electric field of similar strength. This dual frequency addressed rubbing free device shows very wide and highly symmetric viewing angle characteristics, with contrast ratio comparable to that of a rubbed TN device, and with very fast response time. Addressing the device in a "dual frequency dual amplitude pulsed mode" leads to only a small increase (∼1.5 times) in power consumption in comparison with the conventional single frequency addressed device.

UR - http://www.scopus.com/inward/record.url?scp=12844266840&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=12844266840&partnerID=8YFLogxK

U2 - 10.1080/15421400490433163

DO - 10.1080/15421400490433163

M3 - Conference article

VL - 410

JO - Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals

SN - 1542-1406

ER -