Patents by Inventor John K. Roberts

John K. Roberts 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: 6924470
    Abstract: An imaging system for use in a vehicle headlamp control system includes an opening, an image sensor, a red lens blocking red complement light between the opening and the image sensor, and a red complement lens blocking red light between the opening and the image sensor. Each lens focuses light onto a different subwindow of the image sensor. The imaging system allows processing and control logic to detect the presence of headlamps on oncoming vehicles and tail lights on vehicles approached from the rear for the purpose of controlling headlamps. A light sampling lens may be used to redirect light rays from an arc spanning above the vehicle to in front of the vehicle into substantially horizontal rays. The light sampling lens is imaged by the image sensor to produce an indication of light intensity at various elevations. The processing and control logic uses the light intensity to determine whether headlamps should be turned on or off.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: August 2, 2005
    Assignee: Gentex Corporation
    Inventors: Jon H. Bechtel, Joseph S. Stam, John K. Roberts
  • Patent number: 6919548
    Abstract: An automatic vehicle headlamp dimming system which includes an optical system and an imaging processing system. The optical system is configured to discriminate between headlamps and tail lamps, and focus the light rays from the headlamps and tail lamps on different portions of a pixel sensor array. The optical system as well as the image processing system provides for relatively increased discrimination of headlamps and tail lamps of other vehicles and also enables the high beam headlamps of the control vehicle to be controlled as a function of the distance as well as horizontal angular position of other vehicles relative to the controlled vehicle.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: July 19, 2005
    Assignee: Gentax Corporation
    Inventors: Joseph S. Stam, Jon H. Bechtel, John K. Roberts
  • Patent number: 6861636
    Abstract: A moisture sensing system of the present invention includes first and second sensor arrays, at least one optical system operative to image the same portion of the surface onto both of the sensor arrays, and a processing system in communication with the sensor arrays and operative to analyze images from the sensor arrays to detect moisture. The sensor arrays may be two-dimensional sensor arrays that are separate or different portions of the same sensor array. This system may be used to control the windshield wipers of a vehicle. The processing system may be configured to subtract an image obtained from the first sensor array from an image obtained from the second sensor array to distinguish between near field and far field objects.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: March 1, 2005
    Assignee: Gentex Corporation
    Inventors: Harold C. Ockerse, John K. Roberts
  • Patent number: 6849867
    Abstract: A radiation emitting device of the present invention includes at least one radiation emitter, first and second electrical leads electrically coupled to the radiation emitter, and an integral encapsulant configured to encapsulate the radiation emitter and a portion of the first and second electrical leads. The encapsulant has at least a first zone and a second zone, where the second zone exhibits at least one different characteristic from the first zone. Such different characteristics may be a physical, structural, and/or compositional characteristic. Preferably, the at least one different characteristic includes at least one of the following: mechanical strength, thermal conductivity, thermal capacity, coefficient of thermal expansion, specific heat, oxygen and moisture impermeability, adhesion, and transmittance with respect to radiation emitted from the radiation emitter. The radiation emitter may be in a form of an emitter, and is preferably an LED.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: February 1, 2005
    Assignee: Gentex Corporation
    Inventors: John K. Roberts, Spencer D. Reese
  • Patent number: 6828170
    Abstract: A semiconductor optical radiation package includes a leadframe, at least one semiconductor optical radiation emitter, and an encapsulant. The leadframe has a heat extraction member, which supports the semiconductor optical emitter and provides one or more thermal paths for removing heat generated within the emitter to the ambient environment, as well as at least two electrical leads for providing electrical coupling to the semiconductor optical radiation emitter. The encapsulant covers and protects the emitter and optional wire bonds from damage and allows radiation to be emitted from the emitter into the ambient environment. The semiconductor optical radiation package provides high emitted flux and is preferably compatible with automated processing techniques.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: December 7, 2004
    Assignee: Gentex Corporation
    Inventors: John K. Roberts, Joseph S. Stam, Spencer D. Reese, Robert R. Turnbull
  • Publication number: 20040239243
    Abstract: A light emitting assembly having a first light source and a second light source. The first and second light sources are oriented such that when the first and second light sources emit light, light emitted from the first and second light sources overlaps and is capable of forming effective white light. The light emitted from the first light source exhibits color coordinates different from the light emitted from the second light source. One of the light sources may be a photoluminescent source, such as a fluorescent dye or phosphor.
    Type: Application
    Filed: March 2, 2004
    Publication date: December 2, 2004
    Inventors: John K. Roberts, Robert R. Turnbull, Robert C. Knapp, Kathy E. Roberts
  • Patent number: 6805474
    Abstract: An apparatus including at least one LED mounted to a printed circuit board, a reflector including at least one heat stake, and a mounting plate comprising at least one aperture for receiving the at least one heat stake. The at least one LED is positioned between the reflector and the mounting plate such that the at least one LED is held in position when the at least one heat stake is received within the at least one aperture.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: October 19, 2004
    Assignee: Gentex Corporation
    Inventors: Jeremy A. Walser, Kenton J. Ypma, Daniel J. Bostwick, John K. Roberts, Robert Steel, Steven J. Miskelley, Darin D. Tuttle
  • Publication number: 20040202001
    Abstract: The present invention relates to information display assemblies and various covert displays using the same.
    Type: Application
    Filed: February 10, 2004
    Publication date: October 14, 2004
    Inventors: John K. Roberts, Frederick T. Bauer, Darin D. Tuttle, Harold C. Ockerse, Robert R. Turnbull, David M. Falb
  • Publication number: 20040184282
    Abstract: Rearview mirror assemblies are provided that incorporate a plurality of added features. In at least one embodiment, at least two devices are incorporated into a rearview mirror selected from a group comprising an interior illumination assembly, an illuminated operator interface and an information display. In at least one embodiment, the light rays emitted by the selected at least two devices comprise substantially the same spectral characteristics. In at least one embodiment, the spectral characteristics are operator selectable from a plurality of predetermined spectral characteristics.
    Type: Application
    Filed: March 20, 2003
    Publication date: September 23, 2004
    Inventors: Kazuhiko Nishijima, Timothy A. Bonardi, John K. Roberts, Kenton Van Klompenberg
  • Publication number: 20040160786
    Abstract: A vehicle system is disclosed that includes a vehicle lamp assembly including a plurality of LEDs that emit white light so as to function as an illuminator light. The lamp assembly also may include a plurality of LEDs that emit colored light to function as a signal light. The lamp assembly may include a camera. The lamp assembly may serve as a CHMSL or as a tail light. The system also includes a controller that rapidly pulses the LEDs at a rate that is imperceivable by the human eye. The pulsing intervals of the LEDs may be related to the readout intervals of the camera sensor array. In this manner, the LEDs may be pulsed on during camera readout to increase the illumination while the camera is capturing an image, or may be pulsed off during camera readout to prevent feedback glare from interfering with image capture by the camera.
    Type: Application
    Filed: December 31, 2003
    Publication date: August 19, 2004
    Inventors: Frederick T. Bauer, Lois Bauer, John K. Roberts, Joseph S. Stam
  • Publication number: 20040143380
    Abstract: The present invention relates to various apparatus, algorithms and methods for acquiring and processing images of a scene. Details of various aspects of the associated images are identified and may be utilized to generate various vehicular equipment control signals.
    Type: Application
    Filed: August 20, 2003
    Publication date: July 22, 2004
    Inventors: Joseph S. Stam, Gregory A. Mart, Keith H. Berends, Gregory S. Bush, John K. Roberts, Mark W. Pierce, Jon H. Bechtel, Eric J. Walstra, Brock R. Rycenga
  • Publication number: 20040130789
    Abstract: The inventive sensor device includes a support structure, a sensing element mounted on the support substrate for sensing optical radiation and generating an electrical output signal in response thereto, and an encapsulant encapsulating the sensing element on the support structure. The encapsulant includes an integral lens. Alternatively or additionally, the encapsulant may have at least a first zone and a second zone, where the second zone exhibits at least one different characteristic from the first zone, such as a different optical, physical, thermal, or compositional characteristic. In addition, the encapsulant may include an integral diffuser. Further, the sensing element may have an active sensing area of less than 1 mm2, and may be positioned closer to the surface of the integral lens than a distance corresponding to a focal length of the integral lens.
    Type: Application
    Filed: December 18, 2003
    Publication date: July 8, 2004
    Inventors: Jon H. Bechtel, Harold C. Ockerse, John K. Roberts, Joseph S. Stam
  • Publication number: 20040113549
    Abstract: The electronic component package (10) of the present invention includes a sealed chamber, a liquid or gel (20) contained in the sealed chamber, at least one electronic component (12) disposed in the sealed chamber in physical and thermal contact with the liquid or gel (20); and at least one electrical conductor electrically coupled to the electronic component and extending out of the sealed chamber. The electronic component(s) (12) may include any one or combination of a radiation emitter, a thermal or optical sensor, a resistor, and a microprocessor or other semiconductor component.
    Type: Application
    Filed: January 29, 2004
    Publication date: June 17, 2004
    Inventors: John K Roberts, Spencer D Reese
  • Publication number: 20040095632
    Abstract: A mirror assembly includes a housing, an angularly adjustable power pack, wires for supplying power and mirror angle control, an electrochromic mirror subassembly including a heater, and a turn signal device. The components include individual connectors that plug into a multi-prong connector on the bundle of wires, or that piggyback into each other. Optionally, the heater incorporates an internal wire with end connectors for communicating power to opposite sides of the heater, and also includes layers of light-transmitting/diffusing material for diffusing light passing from the turn signal device through the diffusing material. A printed circuit board fits into a pocket in the panel-shaped carrier, and an integral retainer releasably secures the printed circuit board. The power pack is attached to the carrier via a ring of resilient fingers, and a continuous hoop flange prevents distortion of the carrier and in turn of the glass elements in the mirror subassembly.
    Type: Application
    Filed: November 14, 2003
    Publication date: May 20, 2004
    Inventors: Bradley L. Busscher, Bradley L. Northman, Kenton J. Ypma, Randall J. Beute, John K. Roberts, Wayne M. Jordan, Edward L. DeNave, Daniel J. Bostwick, Randall S. Braun, Gregory A. Bosch, Timothy A. Bonardi
  • Publication number: 20040084681
    Abstract: The radiation emitter device of the present invention includes at least two radiation emitters emitting radiation of different wavelengths, first and second electrical leads electrically coupled to at least one of the radiation emitters, and an encapsulant configured to encapsulate the radiation emitters and a portion of the first and second electrical leads. The encapsulant is further configured to have a surface defining an optical lens including a plurality of concentric circular grooves. The optical lens is preferably a divergent lens. Preferably, the lens is a multi-faceted Fresnel lens structure having a plurality of risers and Fresnel facets defining the plurality of concentric circular grooves. The radiation emitter device may further include a secondary reflective cup, preferably a parabolic or elliptical reflective cup, disposed proximate the encapsulant about the periphery of the Fresnel lens structure.
    Type: Application
    Filed: September 30, 2003
    Publication date: May 6, 2004
    Inventor: John K. Roberts
  • Patent number: 6728393
    Abstract: A system and method of automatically controlling vehicle headlamps including an image sensor and a controller to generate headlamp control signals.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: April 27, 2004
    Assignee: Gentex Corporation
    Inventors: Joseph S. Stam, Jon H. Bechtel, Spencer D. Reese, John K. Roberts, William L. Tonar, G. Bruce Poe
  • Publication number: 20040069931
    Abstract: An automatic vehicle headlamp dimming system which includes an optical system and an imaging processing system. The optical system is configured to discriminate between headlamps and tail lamps, and focus the light rays from the headlamps and tail lamps on different portions of a pixel sensor array. The optical system as well as the image processing system provides for relatively increased discrimination of headlamps and tail lamps of other vehicles and also enables the high beam headlamps of the control vehicle to be controlled as a function of the distance as well as horizontal angular position of other vehicles relative to the controlled vehicle.
    Type: Application
    Filed: October 2, 2003
    Publication date: April 15, 2004
    Inventors: Joseph S. Stam, Jon H. Bechtel, John K. Roberts
  • Publication number: 20040046103
    Abstract: A control system for automatically detecting moisture on the windshield of a vehicle. The automatic moisture detecting system includes an optical system for imaging a portion of the windshield on to an image array sensor, such as a CMOS active pixel sensor. The voltage of each of the pixels which represents the illumination level is converted to a corresponding gray scale value by an analog digital converter. The spatial frequency composition of the gray scale values are analyzed to determine the amount of rain present in order to provide a control signal to control the operation of the windshield wipers of the vehicle as a function of the amount of moisture present. The system is also adapted to detect the level of fog both on the interior of the windshield as well as the exterior of the windshield.
    Type: Application
    Filed: March 4, 2003
    Publication date: March 11, 2004
    Inventors: Joseph S. Stam, Jon H. Bechtel, John K. Roberts
  • Publication number: 20040031907
    Abstract: An imaging system for use in a vehicle headlamp control system includes an opening, an image sensor, a red lens blocking red complement light between the opening and the image sensor, and a red complement lens blocking red light between the opening and the image sensor. Each lens focuses light onto a different subwindow of the image sensor. The imaging system allows processing and control logic to detect the presence of headlamps on oncoming vehicles and tail lights on vehicles approached from the rear for the purpose of controlling headlamps. A light sampling lens may be used to redirect light rays from an arc spanning above the vehicle to in front of the vehicle into substantially horizontal rays. The light sampling lens is imaged by the image sensor to produce an indication of light intensity at various elevations. The processing and control logic uses the light intensity to determine whether headlamps should be turned on or off.
    Type: Application
    Filed: August 14, 2003
    Publication date: February 19, 2004
    Inventors: Jon H. Bechtel, Joseph S. Stam, John K. Roberts
  • Patent number: 6679608
    Abstract: The inventive sensor device provides different fields of view in transverse directions. The sensor device include a support structure, a sensing element mounted on the support substrate for sensing optical radiation and generating an electrical output signal in response thereto, and an encapsulant encapsulating the sensing element on the support structure. The encapsulant includes an integral anamorphic lens. Alternatively or additionally, the encapsulant may have at least a first zone and a second zone, where the second zone exhibits at least one different characteristic from the first zone, such as a different optical, physical, thermal, or compositional characteristic.
    Type: Grant
    Filed: January 10, 2002
    Date of Patent: January 20, 2004
    Assignee: Gentex Corporation
    Inventors: Jon H. Bechtel, Harold C. Ockerse, John K. Roberts