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Light source turn-on/off controller

  • US 8,400,062 B2
  • Filed: 09/06/2012
  • Issued: 03/19/2013
  • Est. Priority Date: 08/07/2007
  • Status: Active Grant
First Claim
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1. A light source turn-on/off controller comprising:

  • an input section of a turn-on/off timing signal;

    a PWM signal generating section for generating a pulse signal having the duty cycle that varies so as to simulate the rise or the fall of light emission in turn-on or turn-off of the filament responding to a rise or a fall of the timing signal, an emission control section for controlling an emitting section responding to a pulse signal from the PWM signal generating section, a storage section for storing a plurality of control data tables for the duty cycle control by the PWM signal generating section, and a control section for switching from a midpoint of changing the duty cycle by one of the control data tables to control by another control data table at the same duty cycle.

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