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Method of lamp replacement warning for image projection lighting devices

  • US 6,982,529 B2
  • Filed: 12/31/2003
  • Issued: 01/03/2006
  • Est. Priority Date: 02/07/2003
  • Status: Active Grant
First Claim
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1. An apparatus comprisingan image projection lighting device comprising:

  • a base;

    a yoke;

    a lamp housing;

    the lamp housing comprisinga lamp,and a first light valve;

    a communications port;

    a processing system;

    a memory;

    wherein a cutoff value representing an amount of accumulated operating time at which the lamp begin to operate improperly is stored in the memory;

    wherein an accumulated value representing an actual accumulated amount of operating time of the lamp is stored in the memory;

    wherein the processing system prevents the lamp from operating when the accumulated value is within a limit of the cutoff value, unless the processing system grants a request for a variance;

    wherein when the processing system grants a request for a first variance, the processing system allows the lamp to operate after the accumulated value is within the limit of the cutoff value.

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