Abstract: Disclosed is a waveguide having a light inlet surface and a viewing surface comprising stacked core layers separated by clad layers to form channels and bearing a smoothing layer on at least one of the light inlet surface or the viewing surface thereof.
Type:
Grant
Filed:
December 9, 2002
Date of Patent:
May 17, 2005
Assignee:
Eastman Kodak Company
Inventors:
Peter T. Aylward, Thomas M. Smith, Daniel A. Slater, Arunachalam T. Ram
Abstract: A process for making an optical compensator, comprising the steps of coating a orientable resin in a solvent onto a support; drying the resin-containing coating; orienting the resin-containing layer in a predetermined direction; coating a nematic liquid-crystal compound in a solvent carrier onto the orientation layer; drying the nematic liquid-crystal-containing coating; thermally treating the nematic liquid-crystal compound layer, cooling the nematic liquid-crystal compound layer, polymerizing or curing the anisotropic nematic liquid-crystalline layer to form an integral component; and optionally repeating the above steps on top of the integral component so that the optical axis of the first anisotropic nematic liquid-crystal layer is positioned orthogonally relative to the respective optical axis of the second anisotropic nematic liquid-crystal layer about an axis perpendicular to the plane of the support.
Type:
Grant
Filed:
July 12, 2002
Date of Patent:
May 17, 2005
Assignee:
Eastman Kodak Company
Inventors:
Jason A. Payne, Joseph W. Hoff, Richard A. Castle, Charles L. Bauer, James F. Elman
Abstract: Disclosed is a transparent polymeric diffusion film exhibiting at least 50% transmissivity containing a thermoplastic polymeric material with internal microvoids and containing a plurality of complex lenses on a surface thereof. Such films are useful for diffusing light when it is desired to provide and even light distribution.
Type:
Grant
Filed:
March 11, 2002
Date of Patent:
May 10, 2005
Assignee:
Eastman Kodak Company
Inventors:
Cheryl J. Kaminsky, Robert P. Bourdelais, Thomas M. Laney, Michael R. Brickey
Abstract: Disclosed is a color photographic element comprising at least one light sensitive silver halide emulsion layer containing a compound that does not react with oxidized developer, has a Log Kow high enough to improve speed, compared to the same layer without the compound, and comprises (1) a thiadiazole, or (2) an oxadiazole, or (3) a 1,2,4 triazole bearing an amido substituent, and does not contain a hydroxyl or thiol group or their tautomeric equivalents on the azole ring.
Type:
Grant
Filed:
January 17, 2003
Date of Patent:
May 3, 2005
Assignee:
Eastman Kodak Company
Inventors:
Louis E. Friedrich, Philip A. Allway, Judith A. Bogie, Bernard A. Clark, Charles E. Heckler, Stephen P. Singer
Abstract: The invention relates to an optical component comprising a dispersion of layered minute particulate materials in a binder, the layered materials having a layer thickness, a concentration of particulate in the binder, and a basal plane spacing sufficient to provide a component having a light transmissivity of at least 50%.
Type:
Grant
Filed:
October 7, 2002
Date of Patent:
May 3, 2005
Assignee:
Eastman Kodak Company
Inventors:
Robert P. Bourdelais, Narasimharao Dontula, Debasis Majumdar, Cheryl J. Kaminsky
Abstract: Disclosed is an electroluminescent device comprising a light emitting layer comprising a boron complex wherein the boron is bonded to a nitrogen atom of a 6-membered heteroaromatic ring group and to a nitrogen atom of a 5-membered heteroaromatic ring group, provided that the 5- and 6-membered heteroaromatic ring groups are further connected by a methene bridge, and provided further that the 5-membered heteroaromatic ring contains at least one additional heteroatom that is divalent or trivalent. Also disclosed is a device containing the electroluminescent device and a process for emitting light using the device.
Abstract: Disclosed is a process for forming an organometallic cyclometallated iridium compound comprising reacting an iridium halide complex with a silver salt and excess organic cyclometallating ligand in a diol solvent. The process provides better yields and control of desired isomers.
Abstract: Disclosed is an integral film comprising a transparent polymeric substrate having a surface bearing polymeric beads, wherein the swell ratio, the size, and the laydown of the beads are selected so as to provide both a one sided static friction coefficient of not more than 0.68 and an internal haze value of not more than 0.1. The film provides an improved combination of slip and optical properties.
Type:
Grant
Filed:
March 22, 2002
Date of Patent:
February 22, 2005
Assignee:
Eastman Kodak Company
Inventors:
Linda S. Flosenzier, Dennis E. Smith, Roland J. Koestner, William J. Gamble
Abstract: Disclosed is a photographic element comprising a light sensitive silver halide emulsion layer and, having associated with that layer a 1H-pyrazolo[1,5-b]-1,2,4-triazole dye forming coupler having a fully substituted carbon atom at the 6-position, a chloro group at the 7-position, and, at the 2-position, a phenyl ring substituted in the meta position with a carbonamido substituent containing an ?-sulfone moiety. Photographic elements containing these couplers exhibit desirable bleach-fix and activity characteristics.
Type:
Grant
Filed:
December 18, 2003
Date of Patent:
February 8, 2005
Assignee:
Eastman Kodak Company
Inventors:
Robert F. Romanet, Frank D. Coms, Susan M. Fischer
Abstract: Disclosed is a liquid crystal cell having contiguous to a surface of a constraint thereof one or more compensator layers, each containing a transparent amorphous polymeric birefringent material having an out-of plane birefringence more negative than ?0.005. The invention also provides a liquid crystal display and a process for making such a cell.
Abstract: Disclosed is a multilayer electroluminescent device comprising a cathode, an anode, a light emitting layer (LEL) and a layer disposed between the cathode and anode containing a naphthalene compound represented by formula (1): wherein m is 0, 1 or 2; each Ra is an independently selected substituent and each n is independently 0 to 3; each Ara is an independently selected aromatic group; and each Arb is an independently selected carbocyclic aromatic group; provided that two ring substituents may join to form a ring. The device provides a desired high luminance.
Abstract: Disclosed is a projection media comprising a transparent polymer layer with random light diffusing elements and having a Tg of less than 75° C.
Type:
Grant
Filed:
October 24, 2002
Date of Patent:
February 1, 2005
Assignee:
Eastman Kodak Company
Inventors:
Cheryl J. Kaminsky, Robert P. Bourdelais
Abstract: A light diffuser comprises a film bearing a macro diffusion efficiency variation in which the efficiency variation is greater than 5% between two locations that are separated by at least 2 cm where the diffuser comprises a base and a plurality of convex or concave complex lenses on the surface of the base.
Type:
Grant
Filed:
May 16, 2002
Date of Patent:
January 25, 2005
Assignee:
Eastman Kodak Company
Inventors:
Robert P. Bourdelais, Cheryl J. Kaminsky
Abstract: A transparent multilayer comprises (a) a first conductive layer containing an intrinsically conductive polymer and a film forming binder, (b) a second conductive layer, and (c) spacer elements separating the first and second conductive layers, the first conductive layer further comprising an actinic radiation absorbing compound. The film is useful as a component in a touch screen display.
Type:
Grant
Filed:
February 15, 2002
Date of Patent:
January 25, 2005
Assignee:
Eastman Kodak Company
Inventors:
Charles C. Anderson, Ronald S. Cok, Rodney D. Feldman
Abstract: Disclosed is an optical element comprising substrate with a surface feature having a roughness average (Ra) of from 1 to 200 micrometers containing a dispersion of minute layered particulates in a polymer binder.
Type:
Grant
Filed:
October 7, 2002
Date of Patent:
January 18, 2005
Assignee:
Eastman Kodak Company
Inventors:
Cheryl J. Kaminsky, Narasimharao Dontula, Debasis Majumdar, Robert P. Bourdelais
Abstract: Disclosed is an OLED device comprising an anode, a hole transporting layer (HTL), a green light emitting layer (LEL), an electron transporting layer (ETL) and a cathode wherein the light emitting layer comprises a host and up to 10 wt % of a green light emitting indeno[1,2,3-cd]perylene dopant compound. Such devices exhibit improved luminance efficiency.
Type:
Grant
Filed:
April 24, 2002
Date of Patent:
January 11, 2005
Assignee:
Eastman Kodak Company
Inventors:
Christopher T. Brown, Denis Y. Kondakov
Abstract: The invention relates to a photographic element comprising at least one light-sensitive silver halide emulsion layer having associated therewith in the same dispersion a certain de-aggregating hydrogen bond donating and hydrogen bond accepting compound and at least one pyrazole fused ring derivative coupler. The combination provides improved colour reproduction.
Type:
Grant
Filed:
December 4, 2002
Date of Patent:
January 11, 2005
Assignee:
Eastman Kodak Company
Inventors:
Danuta Gibson, David Clarke, Christopher J. Winscom
Abstract: Disclosed is an imaging element comprising a bichromophoric molecule comprising a first chromophore that exhibits a first absorption maximum above 700 nm and a second chromophore that exhibits a second absorption maximum different from the first absorption maximum, wherein the absorption of the first and second chromophores are substantially independent of each other, and a process for imaging using such a donor element. Elements of the invention eliminate unwanted absorptions in the final image.
Type:
Grant
Filed:
December 26, 2002
Date of Patent:
January 11, 2005
Assignee:
Eastman Kodak Company
Inventors:
Charles H. Weidner, Ruizheng Wang, Linda A. Kaszczuk, Glenn T. Pearce
Abstract: The invention provides a process for forming an organometallic cyclometallated complex comprising the step of reacting, in an aprotic organic solvent, an organozinc complex of a desired organic ligand with a metal complex of an element of atomic number 74 to 79 bearing a leaving group.
Abstract: The invention relates to a waveguide comprising a transparent polymeric central core clad externally with one or more polymeric layers, at least one of the core or clad layer containing layered particles disposed in a polymeric binder, wherein a majority of the particles have a lateral dimension less than 1 micrometer.
Type:
Grant
Filed:
August 9, 2002
Date of Patent:
December 14, 2004
Assignee:
Eastman Kodak Company
Inventors:
Peter T. Aylward, Debasis Majumdar, Anne M. Miller, Narasimharao Dontula, Robert O. James