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Light source driving device, and image processing device, image reading device and image forming apparatus using the light source driving device

  • US 8,537,431 B2
  • Filed: 03/28/2011
  • Issued: 09/17/2013
  • Est. Priority Date: 04/12/2010
  • Status: Active Grant
First Claim
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1. A light source driving device for driving plural light sources, comprising:

  • a voltage booster to perform a voltage boosting operation of boosting a supply voltage from a power source to supply the boosted voltage to each of the plural light sources;

    a constant current driver to regularly hold driving current for each of the plural light sources constant;

    a load, that is separate from the plural light sources, to consume substantially a same power as all of the plural light sources; and

    a switch to perform a switching operation of selectively connecting either the load or the plural light sources with the voltage booster and the constant current driver so that either the load or the plural light sources are connected and positioned in between the voltage booster and the constant current driver.

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