| 摘要 |
A printer media sensor comprising a light source (20) positioned to direct light towards media stock (14), a first photo-detector (22) positioned for receiving light emitted from the light source and reflected from the media stock, a second photo-detector (24) positioned for receiving light emitted from the light source and passing through the media stock, and an electronic controller (26) connected for controlling energization of the light source and for receiving signals from the first and second photo-detectors, the electronic controller operable to control an energization level of the light source according to the media type being used.
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