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 articlepeer-review

4 Citations (Scopus)


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
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

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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