Nematic liquid crystal composition containing indane compound

Details Nematic liquid crystal composition containing indane compound Nematic liquid crystal composition containing indane compound

Filed on

2007-06-19

Date issued

2007-06-19

Examiner

Wu, Shean C. (Department: 1756)

Patent Class

Stock material or miscellaneous articles

SubClass

Liquid crystal optical display having layer of specified...

Other Related Categories

C252S299620, C252S299630, C570S183000, C570S187000

Type

Reexamination Certificate

Status

active

Patent number

10536421

Description

ABSTRACT:
The present invention provides a nematic liquid crystal composition using a 4,6-difluoroindane-based compound that has a low lower limit temperature (T→N) of the liquid crystal phase, high upper limit temperature (TN-I) of the liquid crystal phase, and wide liquid crystal phase temperature range without impairing response speed, threshold voltage and other liquid crystal characteristics within a the range of the optimal Δn as a nematic liquid crystal, and a 4,6-difluoroindane-based compound that is used in said liquid crystal composition.The nematic liquid crystal composition contains at least one type of compound having a 4,6-difluoroindan-2,5-diyl group, and the refractive index anisotropy is within the range of 0.08 to 0.15, the liquid crystal phase upper limit temperature is 70° C. or higher, the liquid crystal phase lower limit temperature is −20° C. or lower, and the difference between the liquid crystal phase upper limit temperature and liquid crystal phase lower limit temperature is 90° C. or more.

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English translation by computer for JP 2001-164252, http://www4.ipdl.ncipi.go.jp/Tokujitu/PAJdetail.ipdl?N0000=60&N0120=01&N2001=2&N3001=2001-164252.
European Search Report dated Dec. 22, 2005.

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