Patents by Inventor Rainer Kümer

Rainer Kümer 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 determining PWM values for LED modules
    Patent number: 9097744
    Abstract: A method for obtaining PWM values for an LED module having n LED chips from various color ranges, wherein n>1, wherein for each LED chip a PWM value for producing a target color value is obtained, is characterized in that a calibration measurement is performed in which the wave lengths (?cal1, ?cal2, ?cal3) and/or the standard color proportion values ((x,y)cal1, (x,y)cal2, (x,y)cal3) and possibly the luminous flux values of the individual LED chips are determined at a calibration temperature (Tcal), PWM control points are obtained, where each PWM control point contains a PWM value for each of the n color ranges of the LED module, during operation of the LED module a value that depends on the present temperature (Ta) of the LED module, in particular the present temperature (Ta) itself, is determined, and a first and a second PWM control point are assigned to this temperature-dependent value, and the PWM values for producing the target color value are obtained through interpolation between the assigned PWM c
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: August 4, 2015
    Assignee: Flextronics International Kft.
    Inventors: Tobias Gern, Uwe Burkhardt, Frank Wimbert, Rainer Kümer
  • METHOD OF DETERMINING PWM VALUES FOR LED MODULES
    Publication number: 20130191056
    Abstract: A method for obtaining PWM values for an LED module having n LED chips from various color ranges, wherein n>1, wherein for each LED chip a PWM value for producing a target color value is obtained, is characterized in that a calibration measurement is performed in which the wave lengths (?cal1, ?cal2, ?cal3) and/or the standard color proportion values ((x,y)cal1, (x,y)cal2, (x,y)cal3) and possibly the luminous flux values of the individual LED chips are determined at a calibration temperature (Tcal), PWM control points are obtained, where each PWM control point contains a PWM value for each of the n color ranges of the LED module, during operation of the LED module a value that depends on the present temperature (Ta) of the LED module, in particular the present temperature (Ta) itself, is determined, and a first and a second PWM control point are assigned to this temperature-dependent value, and the PWM values for producing the target color value are obtained through interpolation between the assigned PWM c
    Type: Application
    Filed: July 25, 2012
    Publication date: July 25, 2013
    Applicant: FLEXTRONICS INTERNATIONAL KFT.
    Inventors: Tobias Gern, Uwe Burkhardt, Frank Wimbert, Rainer Kümer