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Hybrid-control current driver for dimming and color mixing in display and illumination systems

  • US 20090302779A1
  • Filed: 06/04/2008
  • Published: 12/10/2009
  • Est. Priority Date: 06/04/2008
  • Status: Active Grant
First Claim
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1. An illumination control circuit comprising:

  • a controlling module comprising;

    one or more analog output signals producing output control voltages each individually variable within a range of values, andone or more digital output signals producing digital pulses between logic “

    1” and

    logic “

    0”

    each with relative duty cycles individually variable within a range of values; and

    one or more intensity modules receivingsaid analog output signals and said digital output signals of said controlling module to control one or more illumination sources;

    wherein said intensity modules are controlled according to said analog output signals and said digital output signals of said controlling module to vary the intensity of said illumination sources in proportion to the voltage level of said analog output signals, and additionally in proportion to the relative duty cycles of said pulses of said digital output signals.

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