Electric field device

Claim 13

In combination, a layer of cholesteric liquid crystalline material exhibiting the property of change in the optical properties in response to an electric field, a first and second electrically conductive member for impressing a field across said layer of cholesteric liquid crystalline material, said first electrically conductive member transmissive to input radiations and means for directing said input radiations through said first electrically conductive member onto said thin film of cholesteric liquid crystalline material.

Claim 14

In combination, a layer of cholesteric liquid crystalline material exhibiting the property of change in the optical properties in response to an electric field, a first and second electrically conductive member for impressing a field across said layer of cholesteric liquid crystalline material, said first electrically conductive member transmissive to input radiations and means for directing said input radiations through said first electrically conductive member onto said thin film of cholesteric liquid crystalline material.

Claim 15

In combination, a thin film of cholesteric liquid crystalline material exhibiting different optical properties to different electric fields, a first and second electrical conductive member for impressing a field across said thin film of cholesteric liquid crystalline material, said first electrically conductive member being transmissive to light and means for input radiations directed through said first electrically conductive member onto said thin film of cholesteric liquid crystalline material to provide a visual indication of the optical property of said thin film.

Claim 16

In combination, a thin film of cholesteric liquid crystalline material exhibiting different optical properties to different electric fields, a first and second electrical conductive member for impressing a field across said thin film of cholesteric liquid crystalline material, said first electrically conductive member being transmissive to light and means for input radiations directed through said first electrically conductive member onto said thin film of cholesteric liquid crystalline material to provide a visual indication of the optical property of said thin film.

Claim 17

In combination, a thin film of cholesteric liquid crystalline material exhibiting the property of selective scattering of light and of a first wavelength region in response to a first electric field and a second wavelength region in response to a second electric field, a first and second electrical conductive member for impressing a field across said thin film of cholesteric liquid crystalline material, said first electrically conductive member being transmissive to input radiations within said first and second wavelength regions, and means directing input radiations including said first and second wavelength regions through said transmissive member onto said thin film of cholesteric liquid crystalline material.

Claim 18

In combination, a thin film of cholesteric liquid crystalline material exhibiting the property of selective scattering of light and of a first wavelength region in response to a first electric field and a second wavelength region in response to a second electric field, a first and second electrical conductive member for impressing a field across said thin film of cholesteric liquid crystalline material, said first electrically conductive member being transmissive to input radiations within said first and second wavelength regions, and means directing input radiations including said first and second wavelength regions through said transmissive member onto said thin film of cholesteric liquid crystalline material.

Claim 19

An article for detecting an electric field comprising a thin film of cholesteric liquid crystalline material and means for impressing said electric field there across.

Claim 20

An article for detecting an electric field comprising a thin film of cholesteric liquid crystalline material and means for impressing said electric field there across.

Claim 21

An optical apparatus for controlling light within a discrete range of wavelengths of the light spectrum comprising a layer of cholesteric liquid crystalline material and means responsive to an electrical signal for impressing an electrical field across said layer.

Claim 22

An optical apparatus for controlling light within a discrete range of wavelengths of the light spectrum comprising a layer of cholesteric liquid crystalline material and means responsive to an electrical signal for impressing an electrical field across said layer.

Claim 23

A light-controlling device responsive to an electric field impressed thereacross comprising a thin film of a cholesteric liquid crystalline material that exhibits the property of selective scattering of radiations directed thereon, means for subjecting said thin film to an electric field to modify the dominant wavelength of the radiation scattering properties of said thin film and means for directing radiations from a source onto said thin film to provide scattering of selective wavelengths of radiations with the spectrum of said source.

Claim 24

A light-controlling device responsive to an electric field impressed thereacross comprising a thin film of a cholesteric liquid crystalline material that exhibits the property of selective scattering of radiations directed thereon, means for subjecting said thin film to an electric field to modify the dominant wavelength of the radiation scattering properties of said thin film and means for directing radiations from a source onto said thin film to provide scattering of selective wavelengths of radiations with the spectrum of said source.

Claim 25

An optiCal apparatus for controlling radiations within a selected range of wavelengths of the spectrum comprising a layer of cholesteric liquid crystalline material, said layer including 15 to 50 percent by weight of at least one material selected from the group consisting of cholesterol, cholesteryl chloride, cholesteryl bromide, cholesteryl iodide, cholestanol, cholestanyl chloride, cholestanyl bromide, cholestanyl iodide, sitosterol, sitosteryl chloride, sitosteryl bromine and sitosteryl iodide and electrically conductive means to impress a field across said layer.

Claim 26

An optiCal apparatus for controlling radiations within a selected range of wavelengths of the spectrum comprising a layer of cholesteric liquid crystalline material, said layer including 15 to 50 percent by weight of at least one material selected from the group consisting of cholesterol, cholesteryl chloride, cholesteryl bromide, cholesteryl iodide, cholestanol, cholestanyl chloride, cholestanyl bromide, cholestanyl iodide, sitosterol, sitosteryl chloride, sitosteryl bromine and sitosteryl iodide and electrically conductive means to impress a field across said layer.

Claim 27

An optical apparatus for controlling light within a selected range of wavelengths of the spectrum comprising a layer of cholesteric liquid crystalline material, said layer comprising 15 to 50 percent by weight of at least one material selected from the group consisting of cholesterol, cholesteryl chloride, cholesteryl iodide, cholesteryl bromide, cholestanol, cholestanyl chloride, cholestanyl bromide, cholestanyl iodide, sitosterol, sitosteryl chloride, sitosteryl bromide, sitosteryl iodine, and the balance including sterol derivatives and up to 20 percent of fatty acids and compounds thereof, and means for impressing an electric field across said layer for varying the optical properties of said layer.

Claim 28

An optical apparatus for controlling light within a selected range of wavelengths of the spectrum comprising a layer of cholesteric liquid crystalline material, said layer comprising 15 to 50 percent by weight of at least one material selected from the group consisting of cholesterol, cholesteryl chloride, cholesteryl iodide, cholesteryl bromide, cholestanol, cholestanyl chloride, cholestanyl bromide, cholestanyl iodide, sitosterol, sitosteryl chloride, sitosteryl bromide, sitosteryl iodine, and the balance including sterol derivatives and up to 20 percent of fatty acids and compounds thereof, and means for impressing an electric field across said layer for varying the optical properties of said layer.

Claim 29

An optical apparatus for controlling radiations comprising a layer of liquid crystalline material of the cholesteric phase including at least one material selected from the group consisting of cholesterol, cholestanol, sitosterol, cholesteryl halide, cholestanyl halide and sitosteryl halide and electrically conductive means for impressing an electric field across said layer.

Claim 30

An optical apparatus for controlling radiations comprising a layer of liquid crystalline material of the cholesteric phase including at least one material selected from the group consisting of cholesterol, cholestanol, sitosterol, cholesteryl halide, cholestanyl halide and sitosteryl halide and electrically conductive means for impressing an electric field across said layer.

Claim 31

A color television system comprising a thin film of a material having a cholesteric liquid crystalline phase, said film exhibiting the optical property of having a different dominant wave of selected scattering in the red, blue and green portions of the spectrum in response to different values of electric field applied thereto.

Claim 32

A color television system comprising a thin film of a material having a cholesteric liquid crystalline phase, said film exhibiting the optical property of having a different dominant wave of selected scattering in the red, blue and green portions of the spectrum in response to different values of electric field applied thereto.

Claim 33

A projection system comprising a thin film of a material having a cholesteric liquid crystalline phase and exhibiting the property of different values of selective transmission of light in response to an electric field supplied thereacross, means for directing light from a source onto said liquid crystalline film, means for impressing different values of electric field across said liquid crystalline film for varying the transmission properties thereof and a screen member onto which a light image is projected through said liquid crystalline film from said source.

Claim 34

A projection system comprising a thin film of a material having a cholesteric liquid crystalline phase and exhibiting the property of different values of selective transmission of light in response to an electric field supplied thereacross, means for directing light from a source onto said liquid crystalline film, means for impressing different values of electric field across said liquid crystalline film for varying the transmission properties thereof and a screen member onto which a light image is projected through said liquid crystalline film from said source.

Claim 37

In combination, a layer of material containing a material in the cholesteric liquid crystalline phase exhibiting the property of changing optical properties in response to an electric field, a first and second electrically conductive member for impressing a field across said layer of material, said first electrically conductive member transmissive to input radiations and means for directing said input radiations through said first electrically conductive member onto said film of material.

Claim 38

In combination, a layer of material containing a material in the cholesteric liquid crystalline phase exhibiting the property of changing optical properties in response to an electric field, a first and second electrically conductive member for impressing a field across said layer of material, said first electrically conductive member transmissive to input radiations and means for directing said input radiations through said first electrically conductive member onto said film of material.

Claim 39

An optical apparatus for controlling light within a discreet range of wavelengths of the light spectrum comprising a layer of material containing cholesterol nonanoate and means responsive to an electrical signal for impressing an electrical field across said layer.

Claim 40

An optical apparatus for controlling light within a discreet range of wavelengths of the light spectrum comprising a layer of material containing cholesterol nonanoate and means responsive to an electrical signal for impressing an electrical field across said layer.