| 摘要 |
An external illumination device for a mobile phone has an illumination unit and a plug. The external illumination device is connected to the mobile phone by an audio jack or an I/O connector of the mobile phone. The battery of the mobile phone supplies the power required for the external illumination device through the audio jack or the I/O connector. When the illumination unit is a laser diode, the mobile phone is used as a pointer. When the illumination unit is a light emitting diode, the mobile phone is used as an illuminator.
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