| 摘要 |
A light-based input device may have multiple branches each based on a respective light-guide structure. A light source may launch light into the light-guide structures. A light sensor may detect light reflected from the light-guide structures or transmitted through the light-guide structures. The light-based input device may be used to gather user input from a user of an electronic device. The user may move an object into contact with the light-guide structures. The light sensor may monitor light intensity fluctuations from the light-guide structures to determine where the light-guide structures have been contacted by the object. Multiple wavelengths of light may be used by the light source and light sensor to reduce crosstalk between adjacent branches of the light-based input device.
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