Additive for liquid crystal materials

Claim 2

A nematic liquid crystal composition having an increased frequency response comprising a nematic liquid crystal material with a negative dielectric anisotropy having dissolved therein an additive to provide electrical conductivity having the formula (C6H5-CH2)2(R)2N X wherein R is selected from the group consisting of methyl and ethyl, and X is selected from the group consisting of Cl , Br , and I .

Claim 3

The nematic liquid crystal composition of claim 1 wherein said additive is present in said nematic liquid crystal material in the range of 0.56 X 10 6 to 10.9 X 10 6 mol/ml.

Claim 4

The nematic liquid crystal composition of claim 1 wherein said additive is dibenzyl-dimethyl ammonium chloride.

Claim 5

The nematic liquid crystal composition of claim 1 wherein said additive is dibenzyl-diethyl ammonium chloride.

Claim 6

The nematic liquid crystal composition of claim 1 wherein said nematic material is p-methoxybenzylidene p-butylaniline.

Claim 7

The nematic liquid crystal composition of claim 1 wherein said nematic material is a mixture of p-methoxy-benzylidene p-butylaniline and p-ethoxybenzylidene p-butylaniline.

Claim 8

AN ELECTRO-OPTICAL DISPLAY DEVICE COMPRISING TWO PARALLEL MEMBERS, AT LEAST ONE OF WHICH IS TRANSPARENT, SPACED APART FROM 10 TO 100 MICRONS, ELECTRODES ON THE FACING SURFACES OF SAID MEMBERS, A NEMATIC LIQUID CRYSTAL MATERIAL INTERPOSED AND FILLING THE SPACE BETWEEN SAID ELECTRODES HAVING A RESISTIVITY IN THE RANGE OF 10**8 TO 5 X 10**9 OHM-CM., SAID NEMATIC LIQUID CRYSTAL MATERIAL HAVING A THRESHOLD ELECTRICAL FIELD WHICH WHEN EXERTED CAUSES SCATTERING OF INCIDENT LIGHT, SAID NEMATIC LIQUID CRYSTAL MATERIAL COMPRISING A NEMATIF MATERIAL WITH A NEGATIVE DIELECTRIC ANISOTROPY HAVING DISSOLVED THEREIN AN ADDITIVE TO PROVIDE ELECTRICAL CONDUCTIVITY HAVING THE FORMULA (R)2(R2)2N+X- WHEREIN R IS A BENZYL GROUP, R2 IS SELECTED FROM THE GROUP CONSISTING OF METHYL AND ETHYL GROUPS, AND X- IS SELECTED FROM THE GROUP CONSISTING OF CL-, BR- AND I-, AND MEANS FOR APPLYING AN ELECTRIC FIELD ACROSS THE NEMATIC LIQUID CRYSTAL MATERIAL THROUGH SAID ELECTRODES THAT EXCEEDS SAID THRESHOLD ELECTRIC FIELD.

Claim 9

AN ELECTRO-OPTICAL DISPLAY DEVICE COMPRISING TWO PARALLEL MEMBERS, AT LEAST ONE OF WHICH IS TRANSPARENT, SPACED APART FROM 10 TO 100 MICRONS, ELECTRODES ON THE FACING SURFACES OF SAID MEMBERS, A NEMATIC LIQUID CRYSTAL MATERIAL INTERPOSED AND FILLING THE SPACE BETWEEN SAID ELECTRODES HAVING A RESISTIVITY IN THE RANGE OF 10**8 TO 5 X 10**9 OHM-CM., SAID NEMATIC LIQUID CRYSTAL MATERIAL HAVING A THRESHOLD ELECTRICAL FIELD WHICH WHEN EXERTED CAUSES SCATTERING OF INCIDENT LIGHT, SAID NEMATIC LIQUID CRYSTAL MATERIAL COMPRISING A NEMATIF MATERIAL WITH A NEGATIVE DIELECTRIC ANISOTROPY HAVING DISSOLVED THEREIN AN ADDITIVE TO PROVIDE ELECTRICAL CONDUCTIVITY HAVING THE FORMULA (R)2(R2)2N+X- WHEREIN R IS A BENZYL GROUP, R2 IS SELECTED FROM THE GROUP CONSISTING OF METHYL AND ETHYL GROUPS, AND X- IS SELECTED FROM THE GROUP CONSISTING OF CL-, BR- AND I-, AND MEANS FOR APPLYING AN ELECTRIC FIELD ACROSS THE NEMATIC LIQUID CRYSTAL MATERIAL THROUGH SAID ELECTRODES THAT EXCEEDS SAID THRESHOLD ELECTRIC FIELD.

Claim 10

The electro-optical device of claim 7 wherein said additive is present in said nematic liquid crystal material in the range of 0.56 X 10 6 to 10.9 X 10 6 mol/ml.

Claim 11

The electro-optical device of claim 7 wherein said additive is dibenzyl-dimethyl ammonium chloride.

Claim 12

The electro-optical device of claim 7 wherein said additive is dibenzyl-diethyl ammonium chloride.

Claim 13

The electro-optical device of claim 7 wherein said nematic material is p-methoxybenzylidene p-butylaniline.

Claim 14

A NEMTAIC LIQUID CRYSTAL COMPOSITION HAVING AN INCREASED FREQUENCY RESPONSE COMPRISING A NEMATIC LIQUID CRYSTAL MATERIAL WITH A NEGATIVE DIELECTRIC ANISTROPY HAVING DISSOLVED THEREIN CHOLINE CHLORIDE.

Claim 15

A NEMTAIC LIQUID CRYSTAL COMPOSITION HAVING AN INCREASED FREQUENCY RESPONSE COMPRISING A NEMATIC LIQUID CRYSTAL MATERIAL WITH A NEGATIVE DIELECTRIC ANISTROPY HAVING DISSOLVED THEREIN CHOLINE CHLORIDE.