Patents by Inventor Rubin Wittenberg

Rubin Wittenberg 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).

  • LED arrangement and method for ambient-light-dependent brightness control of LEDs
    Patent number: 10039168
    Abstract: An LED arrangement comprising at least one LED, which receives an LED illumination voltage in accordance with a square-wave signal, wherein the brightness of the LED is dependent on the ambient luminosity, which is measured by means of the LED, which is switched in a non-illuminated state as a light sensor. The at least one LED is arranged together with a first and a second transistor in a bridge circuit such that the first transistor applies the LED illumination voltage to the LED in accordance with the square-wave signal, and the second transistor applies a voltage having inverted polarity as the LED illumination voltage to the LED in intervals of the turned-off times of the LED, wherein the duty cycle of the square-wave signal is dependent on the strength of a photocurrent, which flows through the LED when the voltage having inverted polarity is applied thereto.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: July 31, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Walter Mayer, Rubin Wittenberg, Heiner Boehm
  • LED ARRANGEMENT AND METHOD FOR AMBIENT-LIGHT-DEPENDENT BRIGHTNESS CONTROL OF LEDS
    Publication number: 20170318642
    Abstract: An LED arrangement comprising at least one LED, which receives an LED illumination voltage in accordance with a square-wave signal, wherein the brightness of the LED is dependent on the ambient luminosity, which is measured by means of the LED, which is switched in a non-illuminated state as a light sensor. The at least one LED is arranged together with a first and a second transistor in a bridge circuit such that the first transistor applies the LED illumination voltage to the LED in accordance with the square-wave signal, and the second transistor applies a voltage having inverted polarity as the LED illumination voltage to the LED in intervals of the turned-off times of the LED, wherein the duty cycle of the square-wave signal is dependent on the strength of a photocurrent, which flows through the LED when the voltage having inverted polarity is applied thereto.
    Type: Application
    Filed: April 12, 2017
    Publication date: November 2, 2017
    Inventors: Walter Mayer, Rubin Wittenberg, Heiner Boehm