Selected US patents

    This list includes selected US patents. Many of the patents have also been issued in other international jurisdictions.

  • High uniformity limited-spread point spread function light emitter: Whitehead, L., US patent 9,534,746, issued Jan. 3, 2017.

  • Light concentrating apparatus: Whitehead, L., Upward, A. and Friedel, P., US patent 9,304,287, issued Apr. 5, 2016.

  • High uniformity limited-spread point spread function light emitter: Whitehead, L., US patent 9,534,746, issued Jan. 3, 2017.

  • Light concentrating apparatus: Whitehead, L., Upward, A. and Friedel, P., US patent 9,304,287, issued Apr. 5, 2016.

  • Registered reflective element for a brightness enhanced TIR display: Whitehead, L., US patent 9,280,029, issued Mar. 8, 2016.

  • Systems and methods for dipole-enhanced inductive power transfer: Whitehead, L., US patent 9,071,062, issued Jun. 30, 2015.

  • Dual-stage sunlighting redirector: Whitehead, L., US patent 8,611,011, issued Dec. 17, 2013.

  • Scodaphoresis and methods and apparatus for moving and concentrating particles: Marziali, A. and Whitehead, L., US patent 8,480,871, issued Jul. 9, 2013.

  • Methods and systems for converting images from low dynamic range to high dynamic range: Whitehead, L, Seetzen, H. and Ward, G., US patent 8,265,378, issued Sep. 11, 2012.

  • Scodaphoresis and Methods and Apparatus for Moving and Concentrating Particles: Marziali et al., US patent 8,133,371, issued Mar. 13, 2012.

  • Ionic Electrophoresis in TIR-Modulated Reflective Image Displays: Whitehead, L., US patent 8,040,591, issued Oct. 18, 2011.

  • Adaptive Sunlight Redirector: Whitehead, L. and Scott, J., US patent 8,000,014, issued Aug. 16, 2011.

  • Brightness Enhancement By Fluid Interface Deformation in TIR-Modulated Displays: Whitehead, L., US patent 7,760,417, issued Jul. 20, 2010.

  • Perforated Multi-Layer Optical Film Luminaire: Whitehead, L., US patent 7,591,094, issued Sep. 22, 2009.

  • HDR Displays and Control Systems Therefore (1): Whitehead, L., et al., US patent 7,581,837, issued Sep.1, 2009.

  • Electrostatically-controlled Diffraction Gratings Using Ionic Electrophoresis: Whitehead, L., et al., US patent 7,576,905, issued Aug. 18, 2009.

  • Magnetic Levitation Apparatus: Davis et al., US patent 7,348,691, issued Mar. 25, 2008.

  • Brightness Enhancement Film for Backlit Image Displays: Whitehead, L. et al., US patent 7,286,280, issued Oct. 23, 2007.

  • High Dynamic Range Display Devices (1): Whitehead, L. et al., US patent 6,891,672, issued May 10, 2005.

  • Wide Viewing Angle Reflective Display: Whitehead, L. et al., US patent 6,885,496, issued Apr. 26, 2006.

  • Color Filtering and Absorbing Total Internal Reflection Image Display: Whitehead, L et al., US patent 6,384,979, issued May 7, 2002.

  • Optical Switching by Controllable Frustration of Total Internal Reflection: Whitehead, L et al., US patent 6,377,383, issued Apr. 23, 2002.

  • High Efficiency High Intensity Backlighting of Graphic Displays: Whitehead, L. et al., US patent 6,079,844, issued Jun. 27,2000.

  • Concentrating Heliostat for Solar Lighting Applications: Whitehead, L., US patent 6,025,583, issued Feb. 15, 2000.

  • Method and Apparatus for Controllable Frustration of Total Internal Reflection: Whitehead, L. et al., US patent 5,999,307, issued Dec. 7, 1999.

  • Passive High Efficiency Variable Reflectivity Image Display Device: Whitehead, L., US patent 5,959,777, issued Sep. 28, 1999.

  • Light Guide Employing Multilayer Optical Film: Whitehead, L., US patent 5,661,839, issued Aug. 26, 1997.

  • Ferro-Fluid Mirror with Shape Determined in Part by an Inhomogeneous Magnetic Field: Shuter et al., US patent 5,650,880, issued Jul.22, 1997.

  • Elastomeric Micro-Electro Mecanical Systems: Whitehead, L et al., US patent 5,642,015, issued Jun. 24, 1997.

  • Hollow Light Guide for Diffuse Light: Whitehead, L., US patent 5,481,637, issued Jan. 2, 1996.

  • High Pressure Low Impedance Electrostatic Transducer: Whitehead, L., US patent 5,450,498, issued Sep. 12, 1995.

  • Levitation System with Permanent Magnets and Coils: Whitehead, L., US patent 5,168,183, issued Dec. 1, 1992.

  • Superconducting Alternative Winding Capacitor Electromagnetic Resonator: Whitehead, L., US patent 4,981,838, issued Jan. 1, 1991.

  • Elastomer Membrane Enhanced Electrostatic Transducer: Whitehead, L., US patent 4,885,783, issued Dec. 5, 1989.

  • Method and Apparatus for Controlled Emission of Light from Prism Light Guide: Whitehead, L., US patent 4,850,665, issued Jul. 25, 1989.

  • Prism Light Guide Luminaire: Whitehead, L., US patent 4,645,579, issued Oct. 7, 1986.

  • Prism Light Guide Having Surfaces which are in Octature: Whitehead, L., US patent 4,260,220, issued Apr. 7, 1981.

  • Light Guide Apparatus: Whitehead, L., US patent 4,662,728, issued May 5, 1987.