| 摘要 |
A switch for controlling a lighting device includes a contact surface, a light source, and an optical navigation sensor. The contact surface includes a generally transparent zone and is configured for removably receiving a fingertip adjacent to the transparent zone. The light source is configured to illuminate the transparent zone of the contact surface. The optical navigation sensor is configured to sense relative motion of the illuminated fingertip at the transparent zone to modify a function of a lighting device external to the light switch based on the relative motion.
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