Patents by Inventor Philip E. Watson
Philip E. Watson 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: 7223005Abstract: Backlighting systems are disclosed, which include a lightguide with at least one light source optically connected to an edge of the lightguide for supplying light into its interior and a reflective cavity with at least one light source optically connected to the reflective cavity for supplying light into its interior. The reflective cavity may include a first reflector and a second reflector and at least one source may be disposed at an edge of the reflective cavity. Alternatively, the reflective cavity may include a back reflector portion and light sources may be disposed at the back reflector portion.Type: GrantFiled: December 23, 2003Date of Patent: May 29, 2007Inventors: David J. Lamb, Keith M. Kotchick, Mark E. Gardiner, Mark B. O'Neill, Patrick H. Marushin, Kenneth A. Epstein, Philip E. Watson
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Patent number: 7095943Abstract: An integrated optical assembly including a light management component with an entry surface and a light delivery component having an exit surface attached to the entry surface of the light management component is disclosed The light management component and the light delivery component are attached together in a manner that defines voids between the entry surface of the light management component and the exit surface of the light delivery component. The voids between the light management component and the light delivery component may provide an air interface over substantial portions of the entry surface of the light management component.Type: GrantFiled: December 8, 2005Date of Patent: August 22, 2006Assignee: 3M Innovative Properties CompanyInventors: Robert M. Emmons, David J. Lamb, Yaoqi J. Liu, Ying-Yuh Lu, Larry A. Meixner, Robert S. Moshrefzadeh, Richard J. Pokorny, Steven J. Rhyner, Philip E. Watson, Leland R. Whitney, Jie Yang
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Patent number: 7084938Abstract: A film that includes a first reflective polarizer substantially reflecting light having a first polarization state and substantially transmitting light having a second polarization state, a polarization rotating layer or depolarizing layer (or both) positioned to receive light passing through the first reflective polarizer, and a second reflective polarizer positioned to receive light passing through the polarization rotating layer or depolarizing layer, the second reflective polarizer substantially reflecting light having a third polarization state back through the polarization rotating layer or depolarizing and substantially transmitting light having a fourth polarization state. Articles containing the film can be formed.Type: GrantFiled: August 17, 2004Date of Patent: August 1, 2006Assignee: 3M Innovative Properties CompanyInventors: Philip E. Watson, Keith M. Kotchick, Richard C. Allen
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Patent number: 7057682Abstract: A polarizer is used with a liquid crystal display (LCD) cell whose liquid crystal molecules are switched in the plane of the cell. The LCD has birefringent properties that are different from other types of LCD cell and, unlike other types of LCD, the image contrast is maintained and there is little color shift in the dark state when a low birefringence polarizer is used with the SIP LCD cell. In one embodiment, the x-z retardation of the layers between the polarization-sensitive absorbing layer and the LCD is less than 20 nm. In another embodiment, the x-z birefringence is less than 0.0005. The low levels of retardation and birefringence may be achieved by omitting the commonly used cellulose triacetate layer between the polarization-sensitive absorbing layer and the LCD.Type: GrantFiled: December 24, 2003Date of Patent: June 6, 2006Assignee: 3M Innovative Properties Co.Inventors: Philip E. Watson, Philip J. Ralli, John J. Cael
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Patent number: 7010212Abstract: An integrated optical assembly including a light management component with an entry surface and a light delivery component having an exit surface attached to the entry surface of the light management component is disclosed The light management component and the light delivery component are attached together in a manner that defines voids between the entry surface of the light management component and the exit surface of the light delivery component. The voids between the light management component and the light delivery component may provide an air interface over substantial portions of the entry surface of the light management component.Type: GrantFiled: May 28, 2002Date of Patent: March 7, 2006Assignee: 3M Innovative Properties CompanyInventors: Robert M. Emmons, David J. Lamb, Yaoqi J. Liu, Ying-Yuh Lu, Larry A. Meixner, Robert S. Moshrefzadeh, Richard J. Pokorny, Steven J. Rhyner, Philip E. Watson, Leland R. Whitney, Jie Yang
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Patent number: 6985291Abstract: A film that includes a first reflective polarizer substantially reflecting light having a first polarization state and substantially transmitting light having a second polarization state, a polarization rotating layer or depolarizing layer (or both) positioned to receive light passing through the first reflective polarizer, and a second reflective polarizer positioned to receive light passing through the polarization rotating layer or depolarizing layer, the second reflective polarizer substantially reflecting light having a third polarization state back through the polarization rotating layer or depolarizing and substantially transmitting light having a fourth polarization state. Articles containing the film can be formed.Type: GrantFiled: October 1, 2001Date of Patent: January 10, 2006Assignee: 3M Innovative Properties CompanyInventors: Philip E. Watson, Keith M. Kotchick, Richard C. Allen
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Patent number: 6975455Abstract: A transflective assembly includes an absorbing polarizer and a first reflective polarizer disposed to reflect at least a portion of light transmitted through the absorbing polarizer. A second reflective polarizer is disposed between the absorbing polarizer and the first reflective polarizer. The second reflective polarizer reflects light transmitted through the first reflective polarizer having a polarization absorbable in the absorbing polarizer, and transmits light transmitted through the absorbing polarizer towards the first reflective polarizer.Type: GrantFiled: April 18, 2000Date of Patent: December 13, 2005Assignee: 3M Innovative Properties CompanyInventors: Keith M. Kotchick, Philip E. Watson, Robert Bennet
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Publication number: 20030223216Abstract: An integrated optical assembly including a light management component with an entry surface and a light delivery component having an exit surface attached to the entry surface of the light management component is disclosed The light management component and the light delivery component are attached together in a manner that defines voids between the entry surface of the light management component and the exit surface of the light delivery component. The voids between the light management component and the light delivery component may provide an air interface over substantial portions of the entry surface of the light management component.Type: ApplicationFiled: May 28, 2002Publication date: December 4, 2003Inventors: Robert M. Emmons, David J. Lamb, Yaoqi J. Liu, Ying-Yuh Lu, Larry A. Meixner, Robert S. Moshrefzadeh, Richard J. Pokorny, Steven J. Rhyner, Philip E. Watson, Leland R. Whitney, Jie Yang
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Patent number: 6576887Abstract: A light guide including a light guide body having a light re-directing side positioned opposite from a light output side. A plurality of elongate prisms are located adjacent the light output side of the light guide body. The prisms extend side-by-side relative to one another along lengths. The prisms include upper edges defining heights of the prisms. The upper edges extend along the lengths of the prisms. Each upper edge includes a plurality of edge segments having different magnitudes of slope. The light guide also includes a plurality of light extraction structures located adjacent the light re-directing side of the light guide body for reflecting light toward the light output side. The light extraction structures include elongated projections each having a plateau segment and first and second facets. The elongated projections are separated by lands that are recessed relative to the plateau segments. The first and second facets extend from the plateau segments to the lands.Type: GrantFiled: August 15, 2001Date of Patent: June 10, 2003Assignee: 3M Innovative Properties CompanyInventors: Leland R. Whitney, Gary T. Boyd, Keith M. Kotchick, Kenneth A. Epstein, Sanford Cobb, Jr., Philip E Watson, David J. Lamb, Mark E. Gardiner
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Publication number: 20030063236Abstract: A film that includes a first reflective polarizer substantially reflecting light having a first polarization state and substantially transmitting light having a second polarization state, a polarization rotating layer or depolarizing layer (or both) positioned to receive light passing through the first reflective polarizer, and a second reflective polarizer positioned to receive light passing through the polarization rotating layer or depolarizing layer, the second reflective polarizer substantially reflecting light having a third polarization state back through the polarization rotating layer or depolarizing and substantially transmitting light having a fourth polarization state. Articles containing the film can be formed.Type: ApplicationFiled: October 1, 2001Publication date: April 3, 2003Applicant: 3M Innovative Properties CompanyInventors: Philip E. Watson, Keith M. Kotchick, Richard C. Allen
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Publication number: 20030034445Abstract: A light guide including a light guide body having a light re-directing side positioned opposite from a light output side. A plurality of elongate prisms are located adjacent the light output side of the light guide body. The prisms extend side-by-side relative to one another along lengths. The prisms include upper edges defining heights of the prisms. The upper edges extend along the lengths of the prisms. Each upper edge includes a plurality of edge segments having different magnitudes of slope. The light guide also includes a plurality of light extraction structures located adjacent the light re-directing side of the light guide body for reflecting light toward the light output side. The light extraction structures include elongated projections each having a plateau segment and first and second facets. The elongated projections are separated by lands that are recessed relative to the plateau segments. The first and second facets extend from the plateau segments to the lands.Type: ApplicationFiled: August 15, 2001Publication date: February 20, 2003Inventors: Gary T. Boyd, Keith M. Kotchick, Kenneth A. Epstein, Sanford Cobb, Philip E. Watson, David J. Lamb, Mark E. Gardiner