Patents by Inventor Andreas Töpfer

Andreas Töpfer 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).

  • Method of decreasing visible flickering effects in a light emitting diode array operated by pulse width modulated signals
    Patent number: 10487400
    Abstract: A method of changing the brightness of light emitted by first and second light emitting diodes (LEDs) operated by respective first and second pulse width modulation (PWM) control signals includes the steps of (a) changing a first PWM control signal that operates a first LED from a first initial PWM value at a first rate of change to achieve a threshold PWM value at a predetermined point in time; (b) changing a second PWM control signal that operates a second LED from a second initial PWM value at a second rate of change to achieve the threshold PWM value at the predetermined point in time; and (c) subsequent to the predetermined time, changing both the first PWM control signal and the second PWM control signal from the threshold PWM value to achieve a final PWM value.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: November 26, 2019
    Assignee: Lear Corporation
    Inventors: Michael Reier, Andreas Töpfer, Stefan Klinger
  • METHOD OF DECREASING VISIBLE FLICKERING EFFECTS IN A LIGHT EMITTING DIODE ARRAY OPERATED BY PULSE WIDTH MODULATED SIGNALS
    Publication number: 20190194808
    Abstract: A method of changing the brightness of light emitted by first and second light emitting diodes (LEDs) operated by respective first and second pulse width modulation (PWM) control signals includes the steps of (a) changing a first PWM control signal that operates a first LED from a first initial PWM value at a first rate of change to achieve a threshold PWM value at a predetermined point in time; (b) changing a second PWM control signal that operates a second LED from a second initial PWM value at a second rate of change to achieve the threshold PWM value at the predetermined point in time; and (c) subsequent to the predetermined time, changing both the first PWM control signal and the second PWM control signal from the threshold PWM value to achieve a final PWM value.
    Type: Application
    Filed: December 10, 2018
    Publication date: June 27, 2019
    Applicant: Lear Corporation
    Inventors: Michael Reier, Andreas Töpfer, Stefan Klinger