| 摘要 |
A system and method for resetting a light source counter is provided. One embodiment includes a light source assembly having an opening, a light source in the light source assembly, and an alterable material to temporarily obstruct light passage through the opening in the light source assembly when a new light source is powered on and allow light passage after light exposure. Another embodiment provides a method comprising detecting a signal from a photodetector, determining if the signal indicates a new light source, resetting a light source timer, and tracking usage time of the light source. Some embodiments may comprise a light source, a photodetector to detect light from the light source, and a controller coupled with the light source and the photodetector, the controller to reset a light source counter that keeps track of usage time of the light source in response to a signal from the photodetector.
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