Patents by Inventor Giorgio B. Trapani
Giorgio B. Trapani 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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Patent number: 7717564Abstract: A projection system includes a light source producing illumination light, an imager disposed to receive the illumination light, and a projection lens disposed to receive the illumination light from the imager. The imager includes an intrinsic polarizer. The intrinsic polarizer can be an intrinsic polarizer stack including a U.V. curable adhesive.Type: GrantFiled: May 21, 2008Date of Patent: May 18, 2010Assignee: Seiko Epson CorporationInventors: Philip J. Ralli, Pradnya V. Nagarkar, James N. Gordon, Ikuko Ebihara, Charles L. Bruzzone, Giorgio B. Trapani
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Publication number: 20090163686Abstract: An integrated wet stretch method of making an intrinsic polarizer includes the following steps in order: providing a polymeric film comprising poly(vinyl alcohol) and having an original length; immersing the polymeric film in a first bath comprising a first solution having a pH of less than about 3; uniaxially stretching the first polymeric film in the machine direction thereby forming a stretched polymeric film; removing the stretched polymeric film from the first bath; removing excess first solution from the stretched polymeric film; and uniaxially stretching the stretched polymeric film in the machine direction, at a temperature of at least about 120° C., thereby forming a further stretched polymeric film.Type: ApplicationFiled: December 20, 2007Publication date: June 25, 2009Inventors: Michael K. Gerlach, Gerald N. Nkwantah, Giorgio B. Trapani, Pradnya V. Nagarkar, Phillip J. Ralli
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Publication number: 20080218698Abstract: A projection system including an intrinsic polarizer is disclosed. The projection system includes a light source producing illumination light, an imager disposed to receive the illumination light, and a projection lens disposed to receive the illumination light from the imager. The imager includes an intrinsic polarizer. An intrinsic polarizer stack including a U.V. curable adhesive is also disclosed.Type: ApplicationFiled: May 21, 2008Publication date: September 11, 2008Inventors: PHILIP J. RALLI, Pradnya V. Nagarkar, James N. Gordon, Ikuko Ebihara, Charles L. Bruzzone, Giorgio B. Trapani
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Patent number: 7391569Abstract: A projection system including an intrinsic polarizer is disclosed. The projection system includes a light source producing illumination light, an imager disposed to receive the illumination light, and a projection lens disposed to receive the illumination light from the imager. The imager includes an intrinsic polarizer. An intrinsic polarizer stack including a U.V. curable adhesive is also disclosed.Type: GrantFiled: May 18, 2005Date of Patent: June 24, 2008Assignee: 3M Innovative Properties CompanyInventors: Philip J. Ralli, Pradnya V. Nagarkar, James N. Gordon, Ikuko Ebihara, Charles L. Bruzzone, Giorgio B. Trapani
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Patent number: 7339736Abstract: A light polarizing film and method of making same includes a linear polarizer having a first surface and a second surface and having a polarization direction, an optical retarder comprising a simultaneously biaxially oriented polypropylene film disposed adjacent to the first surface of the linear polarizer and having an axis oriented at an angle with respect to the polarization direction, and an adhesive layer disposed between the first surface of the linear polarizer and the optical retarder and having a minimum adhesion strength of about 25 grams per inch.Type: GrantFiled: March 28, 2006Date of Patent: March 4, 2008Assignee: 3M Innovative Properties CompanyInventors: Giorgio B. Trapani, Pradnya V. Nagarkar
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Patent number: 7088511Abstract: A light polarizing film and method of making same includes a linear polarizer having a first surface and a second surface and having a polarization direction, an optical retarder comprising a simultaneously biaxially oriented polypropylene film disposed adjacent to the first surface of the linear polarizer and having an axis oriented at an angle with respect to the polarization direction, and an adhesive layer disposed between the first surface of the linear polarizer and the optical retarder and having a minimum adhesion strength of about 25 grams per inch.Type: GrantFiled: February 12, 2003Date of Patent: August 8, 2006Assignee: 3M Innovative Properties CompanyInventors: Giorgio B. Trapani, Pradnya V. Nagarkar
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Publication number: 20040156105Abstract: A light polarizing film and method of making same includes a linear polarizer having a first surface and a second surface and having a polarization direction, an optical retarder comprising a simultaneously biaxially oriented polypropylene film disposed adjacent to the first surface of the linear polarizer and having an axis oriented at an angle with respect to the polarization direction, and an adhesive layer disposed between the first surface of the linear polarizer and the optical retarder and having a minimum adhesion strength of about 25 grams per inch.Type: ApplicationFiled: February 12, 2003Publication date: August 12, 2004Inventors: Giorgio B. Trapani, Pradnya V. Nagarkar
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Patent number: 5925289Abstract: A visible range synthetic light polarizing element is provided, the optical and polarizing properties thereof having been selectively effected by regulated exposure of said polarizing element to ultraviolet irradiation. The ultraviolet irradiation can be either polarized or non-polarized, but in either case, is at intensities greater than that produced incidentally or by ambient ultraviolet irradiation sources. The resultant light-polarizing element is characterized by its heightened luminous transmittance, an improvement accomplished without departure from good polarization efficiency (i.e., greater than 99.9%).Type: GrantFiled: June 20, 1997Date of Patent: July 20, 1999Assignee: Polaroid CorporationInventors: John J. Cael, Robert L. Jones, Rong-Chang Liang, Giorgio B. Trapani, Tung-Feng Yeh
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Patent number: 5666223Abstract: This invention relates to a new and improved light-polarizing sheet comprising molecularly oriented polyvinyl alcohol containing an oriented block segments of polyvinylene and said polyvinyl alcohol. In particular, the polarizing sheet comprises a polyvinylalcohol/polyvinylene block copolymer material wherein the polyvinylene blocks thereof are formed by molecular dehydration of a sheet of polyvinylalcohol; said sheet of polyvinylalcohol/polyvinylene block copolymer material comprising a uniform distribution of light-polarizing molecules of polyvinylalcohol/polyvinylene block copolymer material varying in the length, n, of the conjugated repeating vinylene unit of the polyvinylene block of the copolymer throughout the range of from 2 to 24; the concentration of each of said polyvinylene blocks, as determined by the absorption of wavelengths ranging from 200 to 700 nm remaining relatively constant, the degree of orientation of said light-polarizing molecules, as measured by the spectral dichroic ratio, R.sub.Type: GrantFiled: December 1, 1995Date of Patent: September 9, 1997Assignee: Polaroid CorporationInventors: Stewart Bennett, John J. Cael, Narendra S. Kadaba, Giorgio B. Trapani
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Patent number: 4591512Abstract: There is described a method for making visible range dichroic polarizer material comprising a uniaxially stretched film of polyvinyl alcohol stained with iodine and treated with a borating solution containing a zinc salt. The method comprises the steps of staining a uniaxially stretched sheet of polyvinyl alcohol and further stretching the stained sheet while it is being treated with a borating solution containing a zinc salt. High efficiency visible range dichroic polarizer elements having good neutrality, very high extinction and high transmittance can be made according to the method.Type: GrantFiled: January 25, 1985Date of Patent: May 27, 1986Assignee: Polaroid CorporationInventors: James L. Racich, Norman W. Schuler, Giorgio B. Trapani
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Patent number: 4201450Abstract: A rigidly bonded electro-optic phase retardation device comprising a transparent, electrically induced ferroelectric ceramic element bonded with a rigid adhesive in sandwich-like configuration between transparent sheet elements, such as glass, or polarizer elements is described. The electro-optic phase retardation device, provided with means for applying an electric field across at least a portion of the induced ferroelectric ceramic element, can be utilized as a birefringent optical device for controllable modulation of polarized light passing through the device. The device is bonded with an adhesive material, such as a cross-linked unsaturated polyester, effective to provide a rigid boundary between the ceramic material and the sheet elements thereof and exhibits rapid optical response speed in the switching from a field-induced birefringent mode to an isotropic zero-field condition.Type: GrantFiled: April 3, 1978Date of Patent: May 6, 1980Assignee: Polaroid CorporationInventor: Giorgio B. Trapani
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Patent number: 4025688Abstract: A novel reflective light-polarizing lamination comprising a light polarizer laminated to the matte surface of aluminum foil and useful in display cells for field-effect transition liquid crystal displays.Type: GrantFiled: November 24, 1975Date of Patent: May 24, 1977Assignee: Polaroid CorporationInventors: Alexander W. Nagy, Giorgio B. Trapani