1
David L Wortman, Sanford Cobb Jr, Mark E Gardiner: Light directing film having variable height structured surface and light directing article constructed therefrom. Minnesota Mining and Manufacturing Company, Jed W Caven, Stephen W Buckingham, Stephen C Jensen, June 23, 1998: US05771328 (257 worldwide citation)

A light directing film including a first surface and a second structured surface. The structured surface includes a repeating pattern of prism zones including at least a first zone having a plurality of prism elements with peaks disposed at a first distance from a reference plane and a second zone h ...


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Andrew J Ouderkirk, Sanford Cobb Jr, Brian D Cull, Michael F Weber, David L Wortman: Transflective displays with reflective polarizing transflector. 3M Innovative Properties Company, Robert J Pechman, July 17, 2001: US06262842 (146 worldwide citation)

A transflector is described which increases efficiency and brightness under both ambient and supplemental lighting conditions in visual display applications. In one embodiment, the transflector includes a reflective polarizing element that reflects one polarization of light and transmits the other. ...


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Sanford Cobb Jr, Brian D Cull, Andrew J Ouderkirk, Michael F Weber, David L Wortman: Diffusely reflecting multilayer polarizers and mirrors. Minnesota Mining and Manufacturing Company, John A Fortkort, October 20, 1998: US05825542 (139 worldwide citation)

Highly efficient diffusely reflecting multilayer mirrors diffusely reflect light incident upon them. Highly efficient diffusely reflecting multilayer polarizers diffusely reflect light of one polarization while diffusely transmitting the other polarization. The diffusely reflecting mirror includes a ...


5
Michael F Weber, David L Wortman, Andrew J Ouderkirk, Sanford Cobb Jr: High efficiency optical devices. 3M Innovative Properties Company, John A Burtis, June 27, 2000: US06080467 (101 worldwide citation)

Optical devices such as light pipes which incorporate multilayer optical films in which the refractive indices of two adjacent layers in the thickness direction are substantially matched or are small relative to the difference in refractive indices of said two adjacent layers in an given in-plane di ...


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Andrew J Ouderkirk, Sanford Cobb Jr, Brian D Cull, Michael F Weber, David L Wortman: Transflective displays with reflective polarizing transflector. 3M Innovative Properties Company, Robert J Pechman, William D Miller, September 26, 2000: US06124971 (94 worldwide citation)

A transflector is described which increases efficiency and brightness under both ambient and supplemental lighting conditions in visual display applications. In one embodiment, the transflector includes a reflective polarizing element that reflects one polarization of light and transmits the other. ...


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Michael F Weber, Olester Benson Jr, Sanford Cobb Jr, James M Jonza, Andrew J Ouderkirk, David L Wortman, Carl A Stover: Display with reflective polarizer and randomizing cavity. 3M Innovative Properties Co, William D Miller, February 15, 2000: US06025897 (88 worldwide citation)

A multiple layer reflective polarizer 12 is described. This element is placed between and optical cavity 24 and an LCD module 16 to form an optical display. The reflective polarizer reflects some light into the optical cavity 24 where it is randomized and may ultimately emerge with the correct polar ...


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David L Wortman, Mark E Gardiner, Andrew J Ouderkirk, James M Jonza, Michael F Weber: Light fixture having a multilayer polymeric film. 3M Innovative Properties Company, John A Burtis, August 8, 2000: US06101032 (88 worldwide citation)

A polarized light source includes a diffuse light source and a reflective polarizing element placed proximate thereto. The reflective polarizing element transmits light of a desired polarization and reflects light of another polarization back into the diffuse source where it is randomized. Some of t ...


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David L Wortman, Sanford Cobb Jr, Brian D Cull, Michael F Weber, Andrew J Ouderkirk: Backlight system with multilayer optical film reflector. 3M Innovative Properties Company, Stephen W Buckingham, June 14, 2005: US06905220 (65 worldwide citation)

The present invention includes a backlight system incorporating a back reflector and/or a lamp cavity reflector constructed of a multilayer optical film.


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Sanford Cobb Jr, David L Wortman: Optical devices using reflecting polarizing materials. 3M Innovative Properties Company, Merchant & Gould P C, February 4, 2003: US06515785 (38 worldwide citation)

Optical devices using reflective polarizers and, in particular, diffusely reflective polarizers are provided. Many of the optical devices utilize the diffusely reflecting and specularly transmitting properties of diffusely reflecting polarizers to enhance their optical characteristics. The optical d ...