Patents Assigned to Pelka & Associates
  • Optical system
    Patent number: 10877253
    Abstract: An optical system for light distribution. The optical system includes at least a reflective surface, at least two refracting surfaces, at least one inner lens and an outer lens. The optical system provides high efficiency collection and distribution of light.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: December 29, 2020
    Assignee: PELKA & ASSOCIATES INC.
    Inventors: Benjamin A. Jacobson, Robert D. Gengelbach
  • Direct-view LED backlight with gradient reflective layer
    Patent number: 10274783
    Abstract: A backlight unit includes an array of light sources arranged on at least one printed circuit board, a reflective member including a plurality of holes provided over the array of light sources such that light from the light sources passes through the holes, and a gradient reflective layer provided over the reflective member to modify a distribution of light received from the array of light sources and the reflective member.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: April 30, 2019
    Assignee: Pelka & Associates, Inc.
    Inventor: David Gerard Pelka
  • Cylindrical irradiance-mapping lens and its applications to LED shelf-lighting
    Patent number: 7273299
    Abstract: A cylindrical irradiance-redistribution lens is positioned over a line of LEDs, and is shaped to redistribute their light for uniformly illuminating a nearby planar target, such as shelves, signs, or walls. The lens shape is calculated via matching the cumulative lateral flux functions of the line of LEDs with that of the uniformly illuminated planar target. Numerous preferred embodiments are disclosed for a variety of illumination geometries.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: September 25, 2007
    Assignee: Pelka & Associates
    Inventors: William A. Parkyn, David G. Pelka