Patents Assigned to Digital Optics International
  • Publication number: 20100315833
    Abstract: The present invention introduces a new class of thin doubly collimating light distributing engines for use in a variety of general lighting applications, especially those benefiting from thinness. Output illumination from these slim-profile illumination systems whether square, rectangular or circular in physical aperture shape is directional, square, rectangular or circular in beam cross-section, and spatially uniform and sharply cutoff outside the system's adjustable far-field angular cone. Field coverage extends from +/?5- to +/?60-degrees and more in each meridian, including all asymmetric combinations in between, both by internal design, by addition of angle spreading film sheets, and angular tilts. Engine brightness is held to safe levels by expanding the size of the engine's output-aperture without sacrifice in the directionality of illumination. One form of the present invention has a single input light emitter, a square output aperture and the capacity to supply hundreds of lumens per engine.
    Type: Application
    Filed: January 29, 2009
    Publication date: December 16, 2010
    Applicant: DIGITAL OPTICS INTERNATIONAL LLC
    Inventors: Robert L. Holman, Matthew B. Sampsell
  • Patent number: 7520642
    Abstract: A compact and efficient optical illumination system featuring planar multi-layered LED light source arrays concentrating their polarized or un-polarized output within a limited angular range. The optical system manipulates light emitted by a planar array of electrically-interconnected LED chips positioned within the input apertures of a corresponding array of shaped metallic reflecting bins using at least one of elevated prismatic films, polarization converting films, micro-lens arrays and external hemispherical or ellipsoidal reflecting elements. Practical applications of the LED array illumination systems include compact LCD or DMD video image projectors, as well as general lighting, automotive lighting, and LCD backlighting.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: April 21, 2009
    Assignee: Digital Optics International Corporation
    Inventors: Robert L. Holman, Arthur Cox
  • Patent number: 7400439
    Abstract: A compact and efficient optical illumination system featuring planar multi-layered LED light source arrays concentrating their polarized or un-polarized output within a limited angular range. The optical system manipulates light emitted by a planar light emitters such as electrically-interconnected LED chips. Each light emitting region in the array is surrounded by reflecting sidewalls whose output is processed by elevated prismatic films, polarization converting films, or both. The optical interaction between light emitters, reflecting sidewalls, and the elevated prismatic films create overlapping virtual images between emitting regions that contribute to the greater optical uniformity. Practical illumination applications of such uniform light source arrays include compact LCD or DMD video image projectors, as well as general lighting, automotive lighting, and LCD backlighting.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: July 15, 2008
    Assignee: Digital Optics International Corporation
    Inventor: Robert L. Holman
  • Patent number: 7210806
    Abstract: A compact and efficient optical illumination system featuring planar multi-layered LED light source arrays concentrating their polarized or un-polarized output within a limited angular range. The optical system manipulates light emitted by a planar array of electrically-interconnected LED chips positioned within the input apertures of a corresponding array of shaped metallic reflecting bins using at least one of elevated prismatic films, polarization converting films, micro-lens arrays and external hemispherical or ellipsoidal reflecting elements. Practical applications of the LED array illumination systems include compact LCD or DMD video image projectors, as well as general lighting, automotive lighting, and LCD backlighting.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: May 1, 2007
    Assignee: Digital Optics International Corporation
    Inventors: Robert L. Holman, Arthur Cox
  • Patent number: 7072096
    Abstract: A compact and efficient optical illumination system featuring planar multi-layered LED light source arrays concentrating their polarized or un-polarized output within a limited angular range. The optical system manipulates light emitted by a planar light emitters such as electrically-interconnected LED chips. Each light emitting region in the array is surrounded by reflecting sidewalls whose output is processed by elevated prismatic films, polarization converting films, or both. The optical interaction between light emitters, reflecting sidewalls, and the elevated prismatic films create overlapping virtual images between emitting regions that contribute to the greater optical uniformity. Practical illumination applications of such uniform light source arrays include compact LCD or DMD video image projectors, as well as general lighting, automotive lighting, and LCD backlighting.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: July 4, 2006
    Assignee: Digital Optics International, Corporation
    Inventors: Robert L. Holman, Arthur Cox
  • Patent number: 6871982
    Abstract: A compact and efficient optical illumination system featuring planar multi-layered LED light source arrays concentrating their polarized or un-polarized output within a limited angular range. The optical system manipulates light emitted by a planar array of electrically-interconnected LED chips positioned within the input apertures of a corresponding array of shaped metallic reflecting bins using at least one of elevated prismatic films, polarization converting films, micro-lens arrays and external hemispherical or ellipsoidal reflecting elements. Practical applications of the LED array illumination systems include compact LCD or DMD video image projectors, as well as general lighting, automotive lighting, and LCD backlighting.
    Type: Grant
    Filed: January 22, 2004
    Date of Patent: March 29, 2005
    Assignee: Digital Optics International Corporation
    Inventors: Robert L. Holman, Arthur Cox
  • Publication number: 20040218390
    Abstract: A compact and efficient optical illumination system featuring planar multi-layered LED light source arrays concentrating their polarized or un-polarized output within a limited angular range. The optical system manipulates light emitted by a planar array of electrically-interconnected LED chips positioned within the input apertures of a corresponding array of shaped metallic reflecting bins using at least one of elevated prismatic films, polarization converting films, micro-lens arrays and external hemispherical or ellipsoidal reflecting elements. Practical applications of the LED array illumination systems include compact LCD or DMD video image projectors, as well as general lighting, automotive lighting, and LCD backlighting.
    Type: Application
    Filed: January 22, 2004
    Publication date: November 4, 2004
    Applicant: Digital Optics International Corporation
    Inventors: Robert L. Holman, Arthur Cox
  • Publication number: 20040080938
    Abstract: A compact and efficient optical illumination system featuring planar multi-layered LED light source arrays concentrating their polarized or un-polarized output within a limited angular range. The optical system manipulates light emitted by a planar light emitters such as electrically-interconnected LED chips. Each light emitting region in the array is surrounded by reflecting sidewalls whose output is processed by elevated prismatic films, polarization converting films, or both. The optical interaction between light emitters, reflecting sidewalls, and the elevated prismatic films create overlapping virtual images between emitting regions that contribute to the greater optical uniformity. Practical illumination applications of such uniform light source arrays include compact LCD or DMD video image projectors, as well as general lighting, automotive lighting, and LCD backlighting.
    Type: Application
    Filed: December 13, 2002
    Publication date: April 29, 2004
    Applicant: Digital Optics International Corporation
    Inventors: Robert L. Holman, Arthur Cox
  • Patent number: 6520643
    Abstract: An image projection system for generating an image on a projection screen using a highly compact geometry. The optical system uses polarized light manipulated by at least one of a conicoid, or plane optical elements to effect a folded mirror system to project an image onto the screen.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: February 18, 2003
    Assignee: Digital Optics International
    Inventors: Robert L. Holman, Arthur Cox
  • Patent number: 6375327
    Abstract: An image projection device having a spatial light modulator and a polarized source system for illuminating the spatial light modulator such that light of a first polarization state illuminates one region of the spatial light modulator and light of a second polarization state illuminates another region of the spatial light modulator. Preferably, the image projection device includes a first set of polarization selective light processing elements, including a first conicoid element which passes light of the first polarization state and reflects light of the second polarization state and a second set of polarization selective light processing elements including a second conicoid element which passes light of the second polarization state and reflects light of the first polarization state.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: April 23, 2002
    Assignee: Digital Optics International
    Inventors: Robert L. Holman, Arthur Cox
  • Patent number: 6213606
    Abstract: An image projection system for generating an image on a projection screen using a highly compact geometry. The optical system uses polarized light manipulated by at least one of a conicoid, or plane optical elements to effect a folded mirror system to project an image onto the screen.
    Type: Grant
    Filed: July 23, 1999
    Date of Patent: April 10, 2001
    Assignee: Digital Optics International
    Inventors: Robert L. Holman, Arthur Cox
  • Patent number: 5975703
    Abstract: An image projection device having a spatial light modulator and a polarized source system for illuminating the spatial light modulator such that light of a first polarization state illuminates one region of the spatial light modulator and light of a second polarization state illuminates another region of the spatial light modulator. Preferably, the image projection device includes a first set of polarization selective light processing elements, including a first conicoid element which passes light of the first polarization state and reflects light of the second polarization state and a second set of polarization selective light processing elements including a second conicoid element which passes light of the second polarization state and reflects light of the first polarization state.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: November 2, 1999
    Assignee: Digital Optics International
    Inventors: Robert L. Holman, Arthur Cox