US 6,982,529 B2 | ||
Method of lamp replacement warning for image projection lighting devices | ||
Richard S. Belliveau, 10643 Floral Park, Austin, Tex. 78759 (US) | ||
Filed on Dec. 31, 2003, as Appl. No. 10/750,398. | ||
Application 10/750398 is a continuation in part of application No. 10/360185, filed on Feb. 07, 2003. | ||
Prior Publication US 2004/0155597 A1, Aug. 12, 2004 | ||
Int. Cl. F21V 33/00 (2006.01) |
U.S. Cl. 315—316 | 8 Claims |
1. An apparatus comprising
an image projection lighting device comprising:
a base; a yoke;
a lamp housing;
the lamp housing comprising
a 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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