Patents by Inventor Charles Douglas MacPherson
Charles Douglas MacPherson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20130114122Abstract: Security documents often incorporate optically variable devices to prevent or hinder counterfeiters. Disclosed herein are layered optically variable devices such as colour-shift foils that employ a piezoelectric layer, and methods for their production and use. Such devices afford new techniques for a user of a security document to check quickly and easily whether the security document is a legitimate document or a counterfeit copy by placing an electrical potential difference across the security document.Type: ApplicationFiled: April 21, 2011Publication date: May 9, 2013Applicant: Fortress Optical Features Ltd.Inventor: Charles Douglas MacPherson
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Publication number: 20120068450Abstract: A security device for authenticating bank notes, documents and other items, comprises a luminescent material for producing luminescent radiation of first and second wavelengths. The security device includes an optically variable structure for controlling emission of luminescent radiation of at least one of the first and second wavelengths from the security device, the security device being arranged to permit, from an area of the optically variable structure, emission of luminescence of the first and second wavelengths from the security device. The optically variable structure causes the relative emissivity of the security device for luminescent radiation of the first and second wavelengths to change with a change m emission angle, so that the security device produces an angle-dependent colour shift m the emitted luminescent radiation.Type: ApplicationFiled: February 26, 2010Publication date: March 22, 2012Applicant: FORTRESS OPTICAL FEATURES LTD.Inventors: Charles Douglas Macpherson, Denis Gerard Vendette, Gilles Girouard, A. .Oliver Stone
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Publication number: 20110222222Abstract: An electronic device includes an array. In one embodiment, a process for forming an electronic device includes the array, which includes electronic components, can include printing one or more layers as a series of segments onto a workpiece. In one embodiment, a process includes printing a layer onto the workpiece and at least one exposed portion of the chuck. In still another embodiment, a printing head is greater than 0.5 mm from the workpiece. In a further embodiment, “hybrid” printing can be used to help form a thicker layer having a relatively thinner width. In a further embodiment, processes can be used to reduce the likelihood of a stitching defect, nonuniformity of a layer across an array, or a combination thereof. A printing apparatus can be modified to achieve more flexibility in liquid compositions, temperatures or other conditions used in printing a layer.Type: ApplicationFiled: May 16, 2011Publication date: September 15, 2011Applicant: E. I. DU PONT DE NEMOURS AND COMPANY DUPONT DISPLAYS INCInventors: CHARLES DOUGLAS MACPHERSON, Dennis Damon Walker, Matthew Stainer, Christopher Todd Knudson, Gang Yu
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Patent number: 7923276Abstract: Processes for forming an electronic device include forming a first radiation region, a second radiation region spaced apart from the first radiation region, and an insulating region. The insulating region can have a first side and a second side opposite the first side. The first radiation region can lie immediately adjacent to the first side, and the second radiation region can lie immediately adjacent to the second side. Within the insulating region, no other radiation region may lie between the first and second radiation regions, and the insulating region can include an insulating layer that includes a plurality of openings. A process for forming the electronic device can include patterning an insulating layer.Type: GrantFiled: July 30, 2010Date of Patent: April 12, 2011Assignees: E. I. du Pont de Nemours and Company, Company Dupont Displays IncInventors: Charles Douglas MacPherson, Gordana Srdanov, Gang Yu
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Publication number: 20100291721Abstract: Processes for forming an electronic device include forming a first radiation region, a second radiation region spaced apart from the first radiation region, and an insulating region. The insulating region can have a first side and a second side opposite the first side. The first radiation region can lie immediately adjacent to the first side, and the second radiation region can lie immediately adjacent to the second side. Within the insulating region, no other radiation region may lie between the first and second radiation regions, and the insulating region can include an insulating layer that includes a plurality of openings. A process for forming the electronic device can include patterning an insulating layer.Type: ApplicationFiled: July 30, 2010Publication date: November 18, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANY DUPONT DISPLAYS INCInventors: CHARLES DOUGLAS MACPHERSON, Gordana Srdanov, Gang Yu
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Publication number: 20100230615Abstract: A security device for authenticating bank notes, documents and other items, comprises a luminescent material for producing luminescent radiation of first and second wavelengths. The security device includes an optically variable structure for controlling emission of luminescent radiation of at least one of the first and second wavelengths from the security device, the security device being arranged to permit, from an area of the optically variable structure, emission of luminescence of the first and second wavelengths from the security device. The optically variable structure causes the relative emissivity of the security device for luminescent radiation of the first and second wavelengths to change with a change in emission angle, so that the security device produces an angle-dependent colour shift in the emitted luminescent radiation.Type: ApplicationFiled: March 11, 2009Publication date: September 16, 2010Inventors: Charles Douglas MacPherson, Denis Gerard Vendette, Gilles Girouard, A. Oliver Stone
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Patent number: 7795653Abstract: An electronic device can include a first radiation region, a second radiation region spaced apart from the first radiation region, and an insulating region. The insulating region can have a first side and a second side opposite the first side. The first radiation region can lie immediately adjacent to the first side, and the second radiation region can lie immediately adjacent to the second side. Within the insulating region, no other radiation region may lie between the first and second radiation regions, and the insulating region can include an insulating layer that includes a plurality of openings. In another aspect, a process for forming the electronic device can include patterning an insulating layer.Type: GrantFiled: December 22, 2006Date of Patent: September 14, 2010Assignees: E. I. du Pont de Nemours and Company, DuPont Displays, Inc.Inventors: Charles Douglas Macpherson, Gordana Srdanov, Gang Yu
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Patent number: 7732810Abstract: An electronic device having a substrate structure having an undercut region is provided and further included is a method for forming an undercut region of a substrate structure. The method includes forming a patterned protective layer over a first electrode. The method also includes forming the substrate structure over the patterned protective layer. An opening within the substrate structure overlies an exposed portion of the substrate structure. The method further includes removing the exposed portion of the patterned protective layer, thereby exposing a portion of the first electrode and forming an undercut region of the substrate structure. The method still further includes depositing a liquid over the first electrode after removing the exposed portion of the patterned protective layer, and solidifying the liquid to form a solid layer.Type: GrantFiled: August 17, 2007Date of Patent: June 8, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Nugent Truong, Charles Douglas Macpherson
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Patent number: 7584701Abstract: An electronic device includes a printed layer. In one embodiment, a process for forming the electronic device includes placing a workpiece over a chuck within a printing apparatus. A temperature difference is established between the workpiece and a liquid composition. The process further includes continuously printing the liquid composition over the workpiece. A viscosity of the liquid composition is allowed to increase at a rate significantly higher than an ambient viscosity increase rate. In another embodiment, the workpiece is allowed to cool to a temperature significantly below an ambient temperature before printing occurs. In still another embodiment, a printing apparatus is used for continuously printing the liquid composition over the workpiece. The printing apparatus includes the chuck, a printing head, a container, a feed line, and a first temperature-adjusting element thermally coupled to the chuck, the printing head, the container the feed line, or a combination thereof.Type: GrantFiled: December 30, 2004Date of Patent: September 8, 2009Assignee: E.I. du Pont de Nemours and CompanyInventors: Charles Douglas MacPherson, Dennis Damon Walker, Matthew Stainer
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Patent number: 7469638Abstract: An electronic device includes an array. In one embodiment, a process for forming an electronic device includes the array, which includes electronic components, can include printing one or more layers as a series of segments onto a workpiece. In one embodiment, a process includes printing a layer onto the workpiece and at least one exposed portion of the chuck. In still another embodiment, a printing head is greater than 0.5 mm from the workpiece. In a further embodiment, “hybrid” printing can be used to help form a thicker layer having a relatively thinner width. In a further embodiment, processes can be used to reduce the likelihood of a stitching defect, nonuniformity of a layer across an array, or a combination thereof. A printing apparatus can be modified to achieve more flexibility in liquid compositions, temperatures or other conditions used in printing a layer.Type: GrantFiled: December 30, 2004Date of Patent: December 30, 2008Assignee: E.I. du Pont de Nemours and CompanyInventors: Charles Douglas MacPherson, Dennis Damon Walker, Matthew Stainer, Christopher Todd Knudson, Gang Yu
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Publication number: 20080282921Abstract: An electronic device includes an array. In one embodiment, a process for forming an electronic device includes the array, which includes electronic components, can include printing one or more layers as a series of segments onto a workpiece. In one embodiment, a process includes printing a layer onto the workpiece and at least one exposed portion of the chuck. In still another embodiment, a printing head is greater than 0.5 mm from the workpiece. In a further embodiment, “hybrid” printing can be used to help form a thicker layer having a relatively thinner width. In a further embodiment, processes can be used to reduce the likelihood of a stitching defect, nonuniformity of a layer across an array, or a combination thereof. A printing apparatus can be modified to achieve more flexibility in liquid compositions, temperatures or other conditions used in printing a layer.Type: ApplicationFiled: January 10, 2008Publication date: November 20, 2008Inventors: CHARLES DOUGLAS MACPHERSON, Dennis Damon Walker, Matthew Stainer, Christopher Todd Knudson, Gang Yu
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Publication number: 20080248314Abstract: Devices are provided comprising conductive or semiconductive layers comprising compositions comprising aqueous dispersions of polythiophenes having homopolymers or co-polymers of Formula I(a) or Formula I(b) and at least one colloid-forming polymeric acid. Methods of making such compositions and using them in organic electronic devices are further provided.Type: ApplicationFiled: May 13, 2008Publication date: October 9, 2008Inventors: Che-Hsiung Hsu, Yong Cao, SungHan Kim, Daniel David Lecloux, Huawen Li, Charles Douglas Macpherson, Chi Zhang, Hjalti Skulason
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Publication number: 20080210931Abstract: An electronic device having a substrate structure having an undercut region is provided and further included is a method for forming an undercut region of a substrate structure. The method includes forming a patterned protective layer over a first electrode. The method also includes forming the substrate structure over the patterned protective layer. An opening within the substrate structure overlies an exposed portion of the substrate structure. The method further includes removing the exposed portion of the patterned protective layer, thereby exposing a portion of the first electrode and forming an undercut region of the substrate structure. The method still further includes depositing a liquid over the first electrode after removing the exposed portion of the patterned protective layer, and solidifying the liquid to form a solid layer.Type: ApplicationFiled: August 17, 2007Publication date: September 4, 2008Inventors: Nugent Truong, Charles Douglas Macpherson
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Publication number: 20080173200Abstract: An electronic device includes an array. In one embodiment, a process for forming an electronic device includes the array, which includes electronic components, can include printing one or more layers as a series of segments onto a workpiece. In one embodiment, a process includes printing a layer onto the workpiece and at least one exposed portion of the chuck. In still another embodiment, a printing head is greater than 0.5 mm from the workpiece. In a further embodiment, “hybrid” printing can be used to help form a thicker layer having a relatively thinner width. In a further embodiment, processes can be used to reduce the likelihood of a stitching defect, nonuniformity of a layer across an array, or a combination thereof. A printing apparatus can be modified to achieve more flexibility in liquid compositions, temperatures or other conditions used in printing a layer.Type: ApplicationFiled: January 10, 2008Publication date: July 24, 2008Inventors: CHARLES DOUGLAS MACPHERSON, DENNIS DAMON WALKER, MATTHEW STAINER, CHRISTOPHER TODD KNUDSON, GANG YU
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Patent number: 7390438Abstract: Compositions are provided comprising aqueous dispersions of polythiophenes having homopolymers or co-polymers of Formula I(a) or Formula I(b) and at least one colloid-forming polymeric acid. Methods of making such compositions and using them in organic electronic devices are further provided.Type: GrantFiled: March 17, 2004Date of Patent: June 24, 2008Assignee: E.I. du Pont de Nemours and CompanyInventors: Che-Hsiung Hsu, Yong Cao, Sunghan Kim, Daniel David Lecloux, Huawen Li, Charles Douglas MacPherson, Chi Zhang, Hjalti Skulason
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Patent number: 7276453Abstract: An electronic device having a substrate structure having an undercut region is provided and further included is a method for forming an undercut region of a substrate structure. The method includes forming a patterned protective layer over a first electrode. The method also includes forming the substrate structure over the patterned protective layer. An opening within the substrate structure overlies an exposed portion of the substrate structure. The method further includes removing the exposed portion of the patterned protective layer, thereby exposing a portion of the first electrode and forming an undercut region of the substrate structure. The method still further includes depositing a liquid over the first electrode after removing the exposed portion of the patterned protective layer, and solidifying the liquid to form a solid layer.Type: GrantFiled: August 10, 2004Date of Patent: October 2, 2007Assignee: E.I. du Pont de Nemours and CompanyInventors: Nugent Truong, Charles Douglas MacPherson
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Patent number: 7268006Abstract: A process for forming an electronic device includes forming a first layer over a substrate and placing a first liquid composition over a first portion of the first layer. The first liquid composition includes at least a first guest material and a first liquid medium. The first liquid composition comes in contact with the first layer and a substantial amount of the first guest material intermixes with the first layer. An electronic device includes a substrate and a continuous first layer overlying the substrate. The continuous layer includes a first portion in which an electronic component lies and a second portion where no electronic component lies. The first portion is at least 30 nm thick and includes a first guest material, and the second portion is no more than 40 nm thick.Type: GrantFiled: December 30, 2004Date of Patent: September 11, 2007Assignee: E.I. du Pont de Nemours and CompanyInventors: Charles Douglas Macpherson, Gordana Srdanov, Matthew Stainer, Gang Yu
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Patent number: 7250461Abstract: Organic compositions of conductive polymers are provided. The compositions have at least one polymer selected from polypyrrole, polythiophene, or combinations and at least one colloid-forming polymeric acid dispersed in a liquid medium that is at least 60% by weight at least one organic liquid. Also provided is a method of making such compositions.Type: GrantFiled: March 17, 2004Date of Patent: July 31, 2007Assignees: E. I. du Pont de Nemours and Company, DuPont Displays, Inc.Inventors: Che-Hsiung Hsu, Charles Douglas Macpherson, Hjalti Skulason
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Patent number: 7187123Abstract: An electronic device is provided that includes an organic panel, including a platform made of an electrically nonconductive material; a first electrode on the platform; an organic active layer on the first electrode; a second electrode on the organic active layer; and a first alignment structure, in addition, a driver panel is provided and includes a substrate; a driver circuit formed on the substrate; and a second alignment structure for coupling with the first alignment structure to position the organic panel and driver panel in substantial alignment, and to electrically couple the driver circuit to the organic active layer.Type: GrantFiled: May 20, 2005Date of Patent: March 6, 2007Assignee: DuPont Displays, Inc.Inventor: Charles Douglas MacPherson
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Patent number: 6992326Abstract: An electronic device includes a substrate, a structure having openings, and a first electrode overlying the structure and lying within the openings. From a cross-sectional view, the structure, at the openings, has a negative slope. From a plan view, each opening has a perimeter that may or may not substantially correspond to a perimeter of an organic electronic component. The portions of the first electrode overlying the structure and lying within the openings are connected to each other. In a process for forming the electronic device, an organic active layer may be deposited within the opening, wherein the organic active layer has a liquid composition.Type: GrantFiled: August 3, 2004Date of Patent: January 31, 2006Assignee: DuPont Displays, Inc.Inventors: Charles Douglas MacPherson, Matthew Stainer, Michael Anzlowar, Paul Anthony Sant, Sughosh Venkatesh