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FREQUENCY SYNTHESIS AND SYNCHRONIZATION FOR LED DRIVERS

  • US 20100085295A1
  • Filed: 10/03/2008
  • Published: 04/08/2010
  • Est. Priority Date: 10/03/2008
  • Status: Active Grant
First Claim
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1. A method comprising:

  • generating a pulse width modulation (PWM) data signal, the PWM data signal comprising;

    a first sequence of PWM cycles having a first predetermined duty ratio, an initial PWM cycle of the first sequence being synchronized to a start of a display of a first frame of a video data at a display device; and

    a first PWM cycle starting in the first frame following the first sequence of PWM cycles and terminating responsive to a start of display of a second frame of the video data at the display device, the second frame following the first frame and the first PWM cycle having a constant reference level for the duration of the first PWM cycle; and

    providing the PWM data signal to a light emitting diode (LED) driver for control of one or more LEDs of the display device.

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