Compensation films for LCDs

Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only

Reexamination Certificate

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Details

C349S117000, C349S119000, C349S181000, C252S299010, C428S001300

Reexamination Certificate

active

06937310

ABSTRACT:
Disclosed is an optical compensation film for Liquid Crystal Displays comprising an amorphous polymer layer disposed on a substrate wherein said amorphous polymer layer has an out-of-plane birefringence Δnth(λ) at a wavelength λ that satisfies both conditions (1) and (2):Condition (1) Δnth(λ) is more negative than −0.005 throughout the range of 370 nm<λ<700 nm;Condition (2) Δnth(λ1) is more negative than Δnth(λ2), for λ1<λ2throughout the range of 370 nm<λ<700 nm.

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patent: 1 197 768 (2002-04-01), None
Fuming Li, et al, “Polyimide Films as Negative Birefringent Compensators for Normally White Twisted Nematic Liquid Crystal Displays”, POLYMER, vol. 37, No. 23, 1996, pp 5321-5325.
J.F. Elman et al, “Multilayer Optical Compensator, Liquid Crystal Display, and Process”, USSN 10/ , (D-84083US2) filed May 8, 2003, a Continuation-in-Part of 10/211,401 filed Aug. 2, 2002.

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