Patents by Inventor Robert R. Turnbull

Robert R. Turnbull 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).

  • Publication number: 20120287496
    Abstract: A power supply for supplying direct current (DC) power from a pulse width modulated (PWM) source includes a connector configured to be in electrical communication with a PWM power source. A hold-up circuit is in electrical communication with the connector and is configured to convert electrical power supplied from the PWM power source to DC power. This DC power is supplied to a drive circuit where a microcontroller is configured to control the drive circuit by supplying the DC power from the drive circuit to a load.
    Type: Application
    Filed: May 10, 2012
    Publication date: November 15, 2012
    Applicant: GENTEX CORPORATION
    Inventors: Gregory J. Nagel, Robert R. Turnbull
  • Patent number: 8243956
    Abstract: An autobias vehicular microphone system (300) includes a microphone (301) uses an amplifier (306) for amplifying an output of the microphone. A first feedback path (308) provides an amplifier output signal to the amplifier input for providing amplifier linearity and a second feedback path (305) is used for providing bias to an voltage reference (303). The voltage reference (303) operates to provide an autobias to the amplifier (306) based upon amplifier loading. Thus, a DC feedback loop works as an average voltage sensing circuit operating to center the amplifier (306) to an operating point near one half its supply voltage. By allowing the bias point to vary, a constant clip level can be maintained depending on varying load conditions of electronic devices (307, 309, 311) using the microphone (301).
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: August 14, 2012
    Assignee: Gentex Corporation
    Inventor: Robert R. Turnbull
  • Patent number: 8224012
    Abstract: A microphone assembly includes one or more transducers positioned in a housing. Circuitry is coupled to the transducer for outputting an electrical signal such that the microphone has a main lobe directed forwardly and attenuates signals originating from the sides and/or rear. The transducers can advantageously include multiple transducers, which, with the circuit, produce a desired sensitivity pattern. The microphone assembly can be employed in a vehicle accessory.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: July 17, 2012
    Assignee: Gentex Corporation
    Inventors: Alan R Watson, Robert C Knapp, Robert R Turnbull, William R Spence, G. Bruce Poe, Michael A Bryson
  • Patent number: 8111179
    Abstract: A rearview assembly includes a mounting structure for attaching to a vehicle. The mounting structure includes a housing that has a rearview element disposed inside for providing a driver of the vehicle with a view to the rear of the vehicle. The rearview assembly also includes a continuously variable slope delta encoder module in or on the mounting structure configured to generate a feedback signal. The rearview assembly also includes a pre-processing module on or within the mounting structure. The pre-processing module is configured to process a source signal and the feedback signal from the continuously variable slope delta encoder module, and to provide a pre-processed signal to the continuously variable slope delta encoder module based on the value of the source signal and the feedback signal.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: February 7, 2012
    Assignee: Gentex Corporation
    Inventors: Robert R. Turnbull, Alan R. Watson
  • Publication number: 20120027241
    Abstract: A microphone mounting assembly (800A/800b) include one or more transducers (801) mounted to a printed circuit board (PCB) (805) where a spacer (803) is used having a channel (807) positioned on the PCB (805) for allowing acoustical energy to pass through the channel (807) to a port (809) in the PCB (805). A first cover (811) is positioned over the channel (807) for disrupting the direct encounter with airflow into the channel (807) while a top section (813) having a second cover (815) is further positioned adjacent to the first fabric cover (811) for preventing debris from obstructing the first fabric cover (811).
    Type: Application
    Filed: July 30, 2010
    Publication date: February 2, 2012
    Inventors: Robert R. Turnbull, Alan R. Watson, Michael A. Bryson
  • Patent number: 8081772
    Abstract: A triangular microphone assembly (101) for use in a vehicle accessory includes a mirror housing (106) adapted for attachment to the interior of the vehicle. A mirror is disposed in an opening of the mirror housing (106) and a plurality of virtual digital microphones (108a, 108b, 108c) are arranged in a substantially triangular configuration in the mirror housing (106). A digital signal processor (DSP) (537) is used for receiving signals from the plurality of digital microphones (108a, 108b, 108c) such that the digital microphones exhibit directional characteristics for reducing undesirable noise in at least one direction by normalizing the phase of the received signals as a function of signal frequency.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: December 20, 2011
    Assignee: Gentex Corporation
    Inventors: Robert R. Turnbull, Alan R. Watson, Michael A. Bryson
  • Publication number: 20110255142
    Abstract: An electrical control system is disclosed for controlling a plurality of variable transmittance windows. The electrical control system comprises a master control circuit and user input circuits for supplying control signals representing transmittance levels for the variable transmission windows, and a plurality of slave window control circuits coupled to the master control circuit, user input circuits and the variable transmittance windows. Each slave window control circuit controls the transmittance of at least one of the variable transmission windows in response to control signals received from the master control circuit and/or user input circuits. Also disclosed are novel methods for the manufacture of an electrochromic device used in variable transmittance windows. Novel structural features for improving heat transfer away from the windows, shielding the window from external loads, and improving the electrical performance of the windows are also disclosed.
    Type: Application
    Filed: June 29, 2011
    Publication date: October 20, 2011
    Inventors: Kevin L. Ash, Bradley L. Busscher, Robert R. Turnbull, George A. Neuman, David J. Cammenga, David A. Theiste
  • Publication number: 20110222706
    Abstract: A vehicular microphone system (200) for post processing optimization of a microphone signal includes a first transducer (201) and second transducer (203) separated by a predetermined distance within an automotive mirror. A first high pass filter network (205) is connected to the first transducer (201) while a second high pass filter network (207) connected to the second transducer (203). A low frequency shelving filter (209) is used for receiving the output from the second high pass filter (207). A first all pass filter (211) is connected to the low frequency shelving filter (209) and a second all pass filter (213) is used in connection with the first all pass filter (211) for tailoring audio characteristics.
    Type: Application
    Filed: December 14, 2009
    Publication date: September 15, 2011
    Inventors: Alan R. Watson, Michael A. Bryson, Robert R. Turnbull
  • Patent number: 7990603
    Abstract: An electrical control system is disclosed for controlling a plurality of variable transmittance windows. The electrical control system comprises a master control circuit and user input circuits for supplying control signals representing transmittance levels for the variable transmission windows, and a plurality of slave window control circuits coupled to the master control circuit, user input circuits and the variable transmittance windows. Each slave window control circuit controls the transmittance of at least one of the variable transmission windows in response to control signals received from the master control circuit and/or user input circuits. Also disclosed are novel methods for the manufacture of an electrochromic device used in variable transmittance windows. Novel structural features for improving heat transfer away from the windows, shielding the window from external loads, and improving the electrical performance of the windows are also disclosed.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: August 2, 2011
    Assignee: Gentex Corporation
    Inventors: Kevin L. Ash, Bradley L. Busscher, Robert R. Turnbull, George A. Neuman, David J. Cammenga, David A. Theiste
  • Patent number: 7988308
    Abstract: A control system for one or more electrochromic elements used in an outside electrochromic (OEC) mirror used in automobiles or other vehicular applications, to control the glare of both IEC elements used as a rearview mirror (20) as well as the OEC elements (24, 26) used as sideview mirrors (24, 26). An ambient light sensor (129) and glare sensor (133) operate to determine a glare level used to control both IEC and OEC electrochromic elements. The drive circuits for the OEC's elements may be controlled so as to account for various factors such as tinted glass characteristics in the vehicle.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: August 2, 2011
    Assignee: Gentex Corporation
    Inventors: Robert R. Turnbull, Michael T. Dillane, Robert C. Knapp, Darin D. Tuttle
  • Publication number: 20110123041
    Abstract: An autobias vehicular microphone system (300) includes a microphone (301) which uses an amplifier (306) for amplifying an output of the microphone. A first feedback path (308) provides an amplifier output signal to the amplifier input for providing amplifier linearity, and a second feedback path (305) is used for providing bias to a voltage reference (303). The voltage reference (303) operates to provide an autobias to the amplifier (306) based upon amplifier load-ing. By holding the bias point to a constant voltage, a constant clip level can be maintained depending on varying load conditions of electronic devices (307, 309, 311) using the microphone (301). Additionally, one or more switches can be used to vary the bias point which can be interpreted to control functionality of the electronic devices (307, 309, 311).
    Type: Application
    Filed: July 20, 2009
    Publication date: May 26, 2011
    Inventors: Robert R. Turnbull, Alan R. Watson
  • Patent number: 7920601
    Abstract: A communications system for controlling equipment associated with a vehicle, includes a micro-controller (604) and a digital serial communication link (621, 622, 662, 663) using a multiplexed timing signal and first data signal. A camera or image sensor (650) located in the vehicular component communicates with the micro-controller (604) via the digital serial communication link.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: April 5, 2011
    Assignee: Gentex Corporation
    Inventors: Jeremy C. Andrus, Timothy R. Friend, Jon H. Bechtel, Robert R. Turnbull
  • Patent number: 7821696
    Abstract: According to one embodiment of the present invention, an electrochromic rearview mirror assembly for a vehicle includes an electrochromic mirror having a variable reflectivity, a glare sensor for sensing levels of light directed towards the front element from the rear of the vehicle, an ambient sensor for sensing levels of ambient light, a display positioned behind the partially transmissive, partially reflective portion of the reflector for displaying information therethrough.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: October 26, 2010
    Assignee: Gentex Corporation
    Inventors: William L. Tonar, Jeffrey A. Forgette, John S. Anderson, David J. Cammenga, Robert R. Turnbull, Philip B. Hall, Mark D. Bugno, Alan R. Watson
  • Patent number: 7817020
    Abstract: A rearview assembly for a vehicle including a mounting structure for mounting to a vehicle, a rearward viewing device, and housing with a position sensor, is provided. The position sensor includes first and second radiation emitters, a radiation reception element, and sensor processing circuitry coupled to one of the position sensors and the radiation reception element. The position sensor determines the position of an object in the vicinity of the rearward viewing device.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: October 19, 2010
    Assignee: Gentex Corporation
    Inventors: Robert R. Turnbull, David A. Blaker, Michael A. Bryson, David L. Plangger, G. Bruce Poe, Alan R. Watson
  • Patent number: 7772966
    Abstract: A vehicle communication and control system is provided that may be more readily installed in a vehicle and that utilizes minimal additional wiring. According to some of the disclosed embodiments, the electrical components of the “brick” of a communication and control system are integrated into a rearview mirror assembly. Preferably, the microwave antenna for the GPS and the cellular telephone antenna are also integrated into the rearview mirror assembly. Various functions and features of the system are also disclosed.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: August 10, 2010
    Assignee: Gentex Corporation
    Inventors: Robert R. Turnbull, Robert C. Knapp, Eric J. Walstra, Alan R. Watson, G. Bruce Poe, John K. Roberts, Wayne J. Rumsey
  • Publication number: 20100150374
    Abstract: A method for processing signals for reducing noise components in a vehicular microphone system (500A) compares (517) a plurality of noise component values (511, 513, 515) for at least one frequency band of plurality of frequency bands. At least one frequency band is then downwardly expanded (521) by a predetermined expansion ratio (523) for providing a noise reduced signal (535) when determining a value is below a predetermined threshold (519).
    Type: Application
    Filed: September 30, 2009
    Publication date: June 17, 2010
    Inventors: Michael A. Bryson, Robert R. Turnbull
  • Publication number: 20100124339
    Abstract: A triangular microphone assembly (101) for use in a vehicle accessory includes a mirror housing (106) adapted for attachment to the interior of the vehicle. A mirror is disposed in an opening of the mirror housing (106) and a plurality of virtual digital microphones (108a, 108b, 108c) are arranged in a substantially triangular configuration in the mirror housing (106). A digital signal processor (DSP) (537) is used for receiving signals from the plurality of digital microphones (108a, 108b, 108c) such that the digital microphones exhibit directional characteristics for reducing undesirable noise in at least one direction by normalizing the phase of the received signals as a function of signal frequency.
    Type: Application
    Filed: November 20, 2008
    Publication date: May 20, 2010
    Inventors: ROBERT R. TURNBULL, Alan R. Watson, Michael A. Bryson
  • Patent number: 7706046
    Abstract: According to the present invention, a rearview mirror comprises a first substrate having a front surface and a rear surface, a reflective coating disposed on a surface of the first substrate, and an electronic circuit component secured to the rear surface of the first substrate. The mirror element may be an electrochromic mirror element comprising a transparent second substrate positioned in front of the first substrate. The electronic component secured to the rear surface may be a component of a drive circuit for the electrochromic mirror element. The rearview mirror element may further comprise electrically conductive tracings provided on the rear surface of the first substrate electrically coupled to the electrical component. The tracings may be used to electrically couple the drive circuit to the electrodes of the electrochromic mirror element. The tracings may be deposited on the rear surface using numerous methods including inkjet printing techniques.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: April 27, 2010
    Assignee: Gentex Corporation
    Inventors: Frederick T. Bauer, Robert R. Turnbull, Thomas F. Guarr, Leroy J. Kloeppner, David L. Eaton, Joel A. Stray, Barry K. Nelson
  • Patent number: 7550703
    Abstract: An automatically dimming mirror includes a dimming element having variable reflectivity, the degree of reflectivity based on a control signal. An ambient light sensor is positioned to receive light from a region generally in front of the vehicle. The ambient light sensor outputs a discrete ambient light signal based on the amount of light incident on the ambient light sensor over an integration period. A glare sensor is positioned to view the scene generally behind the vehicle operator. The glare sensor outputs a discrete glare signal based on the amount of light incident on the glare sensor over an integration period. A dimming logic determines an ambient light level based on the ambient light signal. The glare integration period is determined based on the ambient light level. The glare signal resulting from the glare integration period determines a mirror glare level used to set the dimming element control signal.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: June 23, 2009
    Assignee: Gentex Corporation
    Inventors: Jon H. Bechtel, Joseph S. Stam, Robert R. Turnbull, Robert H. Nixon, Eric R. Fossum
  • Patent number: 7535614
    Abstract: An electrical window control system and method thereof are provided, wherein the system includes a variable transmission window having first and second substantially transparent substrates that define an area, and a variable transmittance material that occupies at least a portion of the area. The system further includes a power source that supplies an electrical power, at least one light source that emits light towards the variable transmission window, and at least one sensor in optical communication with the light source, wherein the at least one sensor receives at least a portion of the light that propagates through at least one of the first and second substantially transparent substrates, and communicates a signal that corresponds to the received light.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: May 19, 2009
    Assignee: Gentex Corporation
    Inventors: Donald L. Tapley, Robert R. Turnbull