| 摘要 |
An optical projector comprising a main body and a sensing module is provided. The main body comprises a controlling unit, a heat-dissipating unit, a projection lens for projecting an image and at least a vent. The sensing module is disposed in the main body. The sensing module and the heat-dissipating unit respectively are electrically connected to the controlling unit. The hot air inside the main body exchanges with the cool air outside the main body through the vent. When the sensing module detects an external object approaching the vent, such as entering a predetermined range around the vent, the sensing module sends a signal to the controlling unit for activating an anti-overheating mechanism; for example, actuating the heat-dispersing unit or/and displaying a warning image on a screen.
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