Back to results
US 12,624,290 B2Granted
Method for reducing white flicker
AssigneeMerck Patent GmbH
InventorsHarald Hirschmann, Ewgenij Wakaresko
Life of this patent
Estimating the term…
Abstract
A method for reducing white flicker by bringing together into a composition one or more compounds of formula G with one or more compounds of formula B and/or C to form a liquid crystal (LC) medium having negative dielectric anisotropy, wherein the reduction of white flicker is achieved compared to an otherwise identical composition, but which does not include either (i) a compound of formula G or (ii) a compound of formula B and/or C.
Claims18
A method for reducing white flicker induced by affecting a flexoelectric effect of a liquid crystal (LC) medium,
- wherein said LC medium has negative dielectric anisotropy,
- said method comprising adding to said LC medium one or more compounds of formula G and one or more compounds of formula B and/or C, and applying a voltage to the resultant LC medium containing the one or more compounds of formula G and the one or more compounds of formula B and/or C, leading to an effect that reduces white flicker,
- wherein the reduction of white flicker is achieved in said resultant LC medium containing the one or more compounds of formula G and the one or more compounds of formula B and/or C compared to the LC medium to which a compound of formula G has not been added:
- in which the individual radicals, on each occurrence identically or differently, and each, independently of one another, have the following meanings:
- denotes
- R0, R1, R2 denote a straight chain alkyl or alkoxy radical having 1 to 15 C atoms or a branched alkyl or alkoxy radical having 3 to 15 C atoms, in which one or more CH2 groups may each be replaced, independently of one another, by
- —C≡C—, —CF2O—, —OCF2—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by halogen,
- L1, L2 denote F or Cl,
- X0 denotes F, Cl, CN, SF5, SCN, NCS, or a halogenated alkyl radical or a halogenated alkoxy radical having 1 to 6 C atoms, or a halogenated alkenyl radical or a halogenated alkenyloxy radical having 2 to 6 C atoms,
- Y1 denotes O, S or CH2O, and
- Z0 denotes a single bond, —C2H4—, —CH2O—, —CF2O—, or —CH═CH—;
- and wherein said resultant LC medium is not the following medium
- CCP-3-1
- 3.0%
- CCP-V-1
- 2.5%
- CLY-3-O2
- 8.0%
- CLY-4-O2
- 8.0%
- CLY-5-O2
- 7.0%
- CPY-3-O2
- 6.5%
- B(S)-2O-O4
- 4.0%
- B(S)-2O-O5
- 6.0%
- B(S)-2O-O6
- 3.0%
- CC-3-V1
- 8.0%
- CC-4-V1
- 20.0%
- CC-3-V
- 6.0%
- Y-4O-O4
- 10.0%
- CCG-V-F
- 8.0%
- Σ
- 100.0%.
39 more elements
A method for reducing white flicker induced by affecting a flexoelectric effect of a liquid crystal (LC) medium,
- wherein said LC medium has negative dielectric anisotropy,
- wherein said LC medium contains one or more compounds of formula B and/or C,
- said method comprising adding to said LC medium one or more compounds of formula G, and applying a voltage to the resultant LC medium containing the one or more compounds of formula G, leading to an effect that reduces white flicker,
- wherein the reduction of white flicker is achieved in said resultant LC medium containing the one or more compounds of formula G compared to said LC medium to which a compound of formula G has not been added:
- in which the individual radicals, on each occurrence identically or differently, and each, independently of one another, have the following meanings:
- denotes
- R0, R1, R2 denote a straight chain alkyl or alkoxy radical having 1 to 15 C atoms or a branched alkyl or alkoxy radical having 3 to 15 C atoms, in which one or more CH2 groups may each be replaced, independently of one another, by
- —C≡C—, —CF2O—, —OCF2—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by halogen,
- L1, L2 denote F or Cl,
- X0 denotes F, Cl, CN, SF5, SCN, NCS, or a halogenated alkyl radical or a halogenated alkoxy radical having 1 to 6 C atoms, or a halogenated alkenyl radical or a halogenated alkenyloxy radical having 2 to 6 C atoms,
- Y1 denotes O, S or CH2O, and
- Z0 denotes a single bond, —C2H4—, —CH2O—, —CF2O—, or —CH═CH—;
- and wherein said resultant LC medium is not the following medium
- CCP-3-1
- 3.0%
- CCP-V-1
- 2.5%
- CLY-3-O2
- 8.0%
- CLY-4-O2
- 8.0%
- CLY-5-O2
- 7.0%
- CPY-3-O2
- 6.5%
- B(S)-2O-O4
- 4.0%
- B(S)-2O-O5
- 6.0%
- B(S)-2O-O6
- 3.0%
- CC-3-V1
- 8.0%
- CC-4-V1
- 20.0%
- CC-3-V
- 6.0%
- Y-4O-O4
- 10.0%
- CCG-V-F
- 8.0%
- Σ
- 100.0%.
40 more elements
Dependencies are inferred from the claim text.