Patent application EP20181815A (EP), filed 2020-06-24
Publication number: EP3757192A1
Title: LIQUID CRYSTALLINE MEDIUM
Abstract: [0001]    The present invention relates to LC media and to LC displays containing these media, especially to displays addressed by an active matrix and in particular to displays of the IPS, PS-IPS, FFS, PS-FFS, HB-FFS, U-IPS, TN, PS-TN, STN or TN-TFT mode.
IPC codes: C09K  19/    04            A I
C09K  19/    12            A I
C09K  19/    20            A I
C09K  19/    30            A I
C09K  19/    34            A I
Claims: number: 1
text: An LC medium with positive dielectric anisotropy, characterized in that it contains one or more compounds of formula I in a concentration of >0 and ≤ 10%
number: 2
text: The LC medium according to Claim 1, characterized in that it has a birefringence <0.15.
number: 3
text: The LC medium according to Claim 1 or 2, characterized in that it comprises one or more compounds of the formula I selected from the following subformulae.
number: 5
text: The LC medium according to one or more of Claims 1 to 4,
characterised in that it additionally comprises one or more compounds selected from the following formulae
number: 6
text: The LC medium according to one or more of Claims 1 to 5,
number: 7
text: The LC medium according to one or more of Claims 1 to 6,
number: 8
text: The LC medium according to one or more of Claims 1 to 7,
number: 9
text: The LC medium according to one or more of Claims 1 to 8,
number: 10
text: The LC medium according to one or more of Claims 1 to 9,
number: 11
text: The LC medium according to one or more of Claims 1 to 10,
number: 12
text: The LC medium according to one or more of Claims 1 to 10,
number: 13
text: The LC medium according to one or more of Claims 1 to 12,
number: 14
text: The LC medium according to one or more of Claims 1 to 13,
number: 15
text: The LC medium according to one or more of Claims 1 to 14,
number: 16
text: The LC medium according to one or more of Claims 1 to 15,
number: 18
text: The LC medium according to one or more of Claims 1 to 17,
number: 19
text: The LC medium according to one or more of Claims 1 to 18,
number: 20
text: The LC medium according to one or more of Claims 1 to 19,
number: 21
text: The LC medium according to one or more of Claims 1 to 20,
number: 22
text: A process for the preparation of an LC medium according to one or more of Claims 1 to 21, characterised in that one or more compounds of the formula I or its subformulae as defined in Claim 1 or 3 are mixed with one or more compounds according to one or more of Claims 4 to 21 or with further LC compounds.
number: 23
text: Use of an LC medium according to one or more of Claims 1 to 21 for electro-optical purposes.
number: 24
text: The use according to Claim 23, where the use is in shutter glasses, for 3D applications, or in IPS, PS-IPS, FFS, PS-FFS, HB-FFS, U-IPS, TN, PS-TN, STN or TN-TFT displays.
number: 25
text: An LC display containing an LC medium according to one or more of Claims 1 to 21.
number: 26
text: The LC display according to Claim 25, characterized in that it is an IPS, PS-IPS, FFS, PS-FFS, HB-FFS, U-IPS, TN, PS-TN, STN or TN-TFT display.
Office action: search_report, dated 2020-12-30
Rejection reasons: novelty_epc_54
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Final disposition: pending (2020-12-30)