Patents Examined by Jean Braner Jeanglaude
  • Patent number: 6266000
    Abstract: A light emitting diode (LED) driver pad comprising a multiplying digital to analog converter (MDAC), which allows for differing LED characteristics to be matched digitally. Either a plurality of MDACs are integrated onto a single integrated circuit, one MDAC per color of LED, or a single MDAC may be multiplexed to drive a plurality of different color LEDs. The MDAC allows for LED operating current to be set digitally, while allowing an overall brightness or intensity control, thus achieving uniform color balance over a range of operating characteristics.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: July 24, 2001
    Assignee: Agilent Technologies, Inc.
    Inventors: Gani Jusuf, Colm P. Lysaght, Ryan P. Donohue