Patents by Inventor Colleen M. Brenner

Colleen M. Brenner 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).

  • Patent number: 6692647
    Abstract: A beaded light dispersing film has a substrate layer, and an optically transparent layer, having a predetermined thickness, disposed over a side of the substrate layer. Optically transmitting beads are arranged to penetrate at least partially into the transparent layer to define clear apertures at interfaces between the beads and the transparent layer. The bead radius is greater than the predetermined thickness. An absorbing layer is disposed on the transparent layer, in interstices between the beads. A method of manufacturing the film includes disposing optically transparent beads partially in an optically transparent layer disposed over a transparent substrate layer. The optically transparent layer has a thickness less than half a diameter of a transparent bead. An absorbing layer overlies the optically transparent layer.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: February 17, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Robert S. Moshrefzadeh, Ragunath Padiyath, Richard J. Pokorny, Hsin-hsin Chou, Jeffrey C. Chang, Colleen M. Brenner
  • Patent number: 6515798
    Abstract: A rear projection screen assembly is described that includes a diffuser and a polarizer. The diffuser has particles dispersed within a binder. The particles and the binder have different refractive indices and are chosen such that the diffuser spreads light of an initial polarization state a cone of angles while substantially preserving the initial polarization state of the light. The diffuser also substantially depolarizing a portion of the light that is laterally scattered in the diffuser. The polarizer is disposed to receive light transmitted through the diffuser. The polarizer transmits light of the initial polarization state while absorbing a portion of the laterally scattered light that has a different polarization state. The resolution of the overall screen assembly may be made higher while also improving other characteristics of the screen assembly.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: February 4, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Hsin-Hsin Chou, Patrick A. Thomas, Colleen M. Brenner-Watschke, Jeffrey C. Chang, Robert M. Moshrefzadeh
  • Publication number: 20020034618
    Abstract: A beaded light dispersing film has a substrate layer, and an optically transparent layer, having a predetermined thickness, disposed over a side of the substrate layer. Optically transmitting beads are arranged to penetrate at least partially into the transparent layer to define clear apertures at interfaces between the beads and the transparent layer. The bead radius is greater than the predetermined thickness. An absorbing layer is disposed on the transparent layer, in interstices between the beads. A method of manufacturing the film includes disposing optically transparent beads partially in an optically transparent layer disposed over a transparent substrate layer. The optically transparent layer has a thickness less than half a diameter of a transparent bead. An absorbing layer overlies the optically transparent layer.
    Type: Application
    Filed: September 28, 2001
    Publication date: March 21, 2002
    Applicant: 3M Innovative Properties Company
    Inventors: Robert S. Moshrefzadeh, Ragunath Padiyath, Richard J. Pokorny, Hsin-hsin Chou, Jeffrey C. Chang, Colleen M. Brenner
  • Patent number: 6344263
    Abstract: A beaded light dispersing film has a substrate layer, and an optically transparent layer, having a predetermined thickness, disposed over a side of the substrate layer. Optically transmitting beads are arranged to penetrate at least partially into the transparent layer to define clear apertures at interfaces between the beads and the transparent layer. The bead radius is greater than the predetermined thickness. An absorbing layer is disposed on the transparent layer, in interstices between the beads. A method of manufacturing the film includes disposing optically transparent beads partially in an optically transparent layer disposed over a transparent substrate layer. The optically transparent layer has a thickness less than half a diameter of a transparent bead. An absorbing layer overlies the optically transparent layer.
    Type: Grant
    Filed: November 13, 1998
    Date of Patent: February 5, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Robert S. Moshrefzadeh, Ragunath Padiyath, Richard J. Pokorny, Hsin-hsin Chou, Jeffrey C. Chang, Colleen M. Brenner
  • Patent number: 6163402
    Abstract: A rear projection screen assembly is described that includes a diffuser and a polarizer. The diffuser has particles dispersed within a binder. The particles and the binder have different refractive indices and are chosen such that the diffuser spreads light of an initial polarization state a cone of angles while substantially preserving the initial polarization state of the light. The diffuser also substantially depolarizing a portion of the light that is laterally scattered in the diffuser. The polarizer is disposed to receive light transmitted through the diffuser. The polarizer transmits light of the initial polarization state while absorbing a portion of the laterally scattered light that has a different polarization state. The resolution of the overall screen assembly may be made higher while also improving other characteristics of the screen assembly.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: December 19, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Hsin-Hsin Chou, Patrick A. Thomas, Colleen M. Brenner-Watschke, Jeffrey C. Chang, Robert M. Moshrefzadeh