| 摘要 |
A projection apparatus includes a projection module and a user operation interface including a button module and a sensor module. The button module includes a button and a light source located under the button. The sensor module is electrically connected to the button module and the sensor module has a sensing scope. The sensing scope covers a location above the button module. When hands of user approach the button module and enter the sensing scope above the button module, the light source under the button provides sufficient illumination, such that users can identify the location of the button easily in dark environment.
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