Single wire serial interface

  • US 8,539,275 B2
  • Filed: 02/15/2011
  • Issued: 09/17/2013
  • Est. Priority Date: 03/28/2002
  • Status: Active Grant
First Claim
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1. A backlight driver, comprising:

  • a first circuit for generating a count value by counting clock pulses, a second circuit for generating a control state for a light source in response to the count value, a third circuit for generating a drive voltage for the light source in response to the control state, and a fourth circuit for resetting the count value to zero in response to a received signal being low for a period that exceeds a predetermined timeout value, the predetermined timeout value being longer than a width of one of the clock pulses.

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