| 主权项 |
1. A projector adapted to electrically connect to an electronic device with an audio-visual playback function, the projector comprising:
a detection unit, for detecting whether a power source voltage from the electronic device is equal to a threshold voltage, detecting whether a power of the power source voltage is equal to a threshold power, and outputting a detection result, based on the power source voltage and the power of the power source voltage, during the projector operation; a light source module, for providing a projection light; a projection unit, for receiving an image data and the projection light to project an image; and a control unit, electrically connected to the detection unit, the projection unit and the light source module, for receiving an image signal from the electronic device and generating the image data received by the projection unit, wherein when the projector is electrically connected to the electronic device, the control unit is configured to control the light source module to gradually adjust a luminance of the projection light starting from a low luminance, wherein the low luminance is a minimum luminance of the projection light generated by the light source module, and adjust the luminance of the projection based on the detection result, and wherein the control unit stops the adjustment of the luminance of the projection light when the detection result shows that the power source voltage is equal to the threshold voltage and the power of the power source voltage is less than or equal to the threshold power, or when the detection result shows that the power source voltage is greater than or equal to the threshold voltage and the power of the power source voltage is equal to the threshold power. |
