Back to results
US 7,144,608 B2Granted
Color correcting polarizer
AssigneeNitto Denko Corporation
InventorsMichael V. Paukshto, Louis D. Silverstein
Life of this patent
Estimating the term…
Abstract
A color-correcting polarizer is provided comprising a polarizer layer and at least one discotic film layer. The discotic film layer is optically transparent within the range of visible wavelength. The discotic film layer works as a polarizer in the wavelength ranges at least from 380 to 500 nm and/or from 600 to 780 nm. A liquid crystal cell comprising the color correcting polarizer is also disclosed.
Claims60
A color correcting polarizer comprising:
- a polarizer layer;
- and at least one discotic film layer,
- wherein the polarizer layer is an O-type polarizer, and
- the discotic film layer is optically transparent within the range of visible wavelength, and works as a polarizer in the wavelength range at least from 380 to 500 nm,
- wherein the discotic film layer is formed from a lyotropic liquid crystal based on discotic dichroic dye molecules, and
- the discotic film layer is made of the sulfonic derivatives of phenanthro-9′, 10′:2,3 quinoxaline of the general structural formula
- where n=1-4, m=1-4, and z=0-6 so that m+z+n≦12;
- X and Y=CH3C2H5, OCH3, OC2H5, Cl, Br, OH, or NH2;
- M is a counterion;
- and j is the number of counterions in the dye molecule, which can be fractional if the counterion is shared among several molecules, and for n>1, different counterion can be involved.
7 more elements
A liquid crystal cell comprising:
- a front panel;
- a rear panel;
- liquid crystal layer placed between the front and rear panels;
- and a color correcting polarizer, wherein
- the color correcting polarizer comprises at least one polarizer layer and at least one discotic film layer, wherein the at least one polarizer layer is an O-type polarizer and the at least one dicotic film layer is optically layer is 0-type polarizer and said discotic film layer is optically transparent within the range of visible wavelength and works as a polarizer in the wavelength range at least from 380 to 500 nm,
- wherein the at least one discotic film layer is formed from a lyotropic liquid crystal based on discotic from a lyotropic liquid crystal based on discotic dichroic dye molecules, and
- is made of the sulfonic derivatives of phenathro-9′, 10′:
- 2,3-quinoxaline of the general structural formula
- where n=1-4, m=1-4, and z=0-6 so that m+z+n≦12;
- X and Y=CH3C2H5, OCH8, OC2H5, Cl, Br, OH, or NH2;
- M is a counterion;
- and j is the number of counterions in the dye molecule, which can be fractional if the counterion is shared among several molecules, and for n>1, different counterions can be involved.
9 more elements
A color correcting polarizer comprising:
- a polarizer layer;
- and at least one discotic film layer,
- wherein the polarizer layer is O-type polarizer, and
- the at least one discotic film layer is optionally transparent within the range of visible wavelength, and works as a polarizer in the wavelength range at least from 380 to 500 nm
- the discotic film layer is formed from a lyotropic liquid crystal based on discotic dichroic dye molecules, and
- is made of a sulfonic derivative of phenanthro-9′, 10′:2,3-quinoxaline of at least one of the structural formulas I–VII:
- where m=0-2, z=0-6, with X and Y=CH3, C2H6, OCH3, OC2H5, Cl, Br, OH, or NH2;
- M being a counterion;
- and j being the number of counterions in the dye molecule, which can be fractional if the counterion is shared among several molecules, and if the number of sulfonic groups is greater than one, different counterions can be involved.
6 more elements
A liquid crystal cell comprising:
- a front panel;
- a rear panel;
- liquid crystal placed between the front and rear panels;
- and a color correcting polarizer;
- wherein
- the color correcting polarizer comprises at least one polarizer layer and at least one discotic film layer, the at least one polarizer layer is an O-type polarizer and the at least one discotic film layer is optionally transparent within the visible wavelength range and works as a polarizer in the wavelength range of at least from 380–500 nm,
- wherein the discotic film layer is formed from a lyotropic liquid crystal based on discotic dichroic dye molecules, and
- is made of a sulfonic derivative of pehnanthro-9′, 10′:2,3-quinoxaline of a least one of the structural formulas I–VIII:
- where m=0-2, z=0-6, with X and Y=CH3, C2H5, OCH3, OC2H5, Cl, Br, OH, or NH2;
- M being a counterion;
- and j being the number of counterions in the dye molecule, which can be fractional if the counterion is shared among several molecules, and if the number of sulfonic groups is greater than one, different counterions can be involved.
8 more elements
Dependencies are inferred from the claim text.