| 摘要 |
<p>The present invention relates to a power supply device which is inserted into an ear bud jack of an electronic device such as a smartphone, MP3 player, or audio device to be operated by a specific audio source or circuit and a laser pointer thereof. The power supply device is inserted into the sound output terminal of the electronic device to supply the left and right sound signals from the sound output terminal as the lower to drive various electronic modules. The power supply device includes: a first terminal receiving either of the left or right sound signals; a second terminal receiving the remaining one; and a voltage step-up circuit unit which lifts the voltages of the left and right sound signals from the first and second terminals to supply the voltage to the electronic modules. The phases of the left and right sound signals are different from each other.</p> |
