Patents by Inventor Paul Fredrick Luther Weindorf

Paul Fredrick Luther Weindorf 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: 20020118182
    Abstract: This invention provides an automatic brightness control system for display devices, which may have a lighted display, a sensor, and control circuitry. The sensor logarithmically generates a first signal in response to the ambient light near the lighted display. The control circuit selects a display luminance from one or more luminance adjustment sequences having essentially constant ratio steps. The display luminance is a fractional power function of the ambient light near the display. The fractional power function may be adjusted by a constant luminance ratio offset.
    Type: Application
    Filed: December 22, 2000
    Publication date: August 29, 2002
    Applicant: VISTEON GLOBAL TECHNOLOGIES, INC.
    Inventor: Paul Fredrick Luther Weindorf
  • Publication number: 20020113808
    Abstract: This invention provides a resolution control system for a display device, which may have a lighted display and control circuitry. The lighted display may be backlit, frontlit, or emissive. The resolution control system may have two or more digital-to-analog converters, which may be provided by digital-to-analog converter (DAC) circuitry in the control circuitry. The DACs convert data values into an output voltage for controlling an operating parameter, which may be brightness, contrast, and the like. The DACs have a cascade arrangement where the output voltage of one DAC is the input voltage of another DAC.
    Type: Application
    Filed: December 22, 2000
    Publication date: August 22, 2002
    Applicant: VISTEON GLOBAL TECHNOLOGIES, INC.
    Inventors: Paul Fredrick Luther Weindorf, Gregory John Milne
  • Patent number: 6396217
    Abstract: This invention provides a brightness offset error reduction system for a display device, which may have a lighted display panel and control circuitry. The lighted display may be backlit, frontlit, or emissive. The brightness offset error reduction system has voltage divider circuitry for receiving an output voltage from digital-to-analog converter (DAC) circuitry. The voltage divider circuitry provides a fractional portion of the output voltage as a divided output voltage. This division of the output voltage reduces brightness offset errors and may increase the brightness resolution at low luminance levels.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: May 28, 2002
    Assignee: Visteon Global Technologies, Inc.
    Inventor: Paul Fredrick Luther Weindorf
  • Patent number: 6388388
    Abstract: The invention provides a brightness control system for a backlight display device that uses the efficiency of the backlight to control the backlight to a desired brightness or luminance. The backlight display device may have a display panel, a backlight, a temperature measurement device, and control circuitry. The control circuitry provides a drive current to the backlight in response to a backlight efficiency and a desired brightness signal. The backlight efficiency is a function of the backlight temperature. The brightness control system may maintain the desired brightness throughout the dynamic range of the backlight display device.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: May 14, 2002
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Paul Fredrick Luther Weindorf, Gregory John Milne