Self-recharging electronic device

Abstract

A self-recharging electronic device is provided, including a charging integrated circuit, a controller, an optocoupler, and a signal converter. The charging integrated circuit is coupled to an internal power supply to charge or discharge the internal power supply. The controller is coupled to the charging integrated circuit and configured to output a control signal to a heat dissipation device. The optocoupler is configured to generate a first signal through a light source and the heat dissipation device, and the signal converter is configured to generate a corresponding output voltage according to the period of the first signal. The charging integrated circuit uses the output voltage to charge the internal power supply.

Claims

1. A self-recharging electronic device, comprising: A charging integrated circuit coupled to an internal power supply to charge or discharge the internal power supply. A controller, coupled to the charging integrated circuit, is configured to output a control signal to a heat dissipation device; an optocoupler is configured to generate a first signal through a light source and the heat dissipation device. A signal converter is configured to generate a corresponding output voltage according to the period of the first signal, wherein the charging integrated circuit uses the output voltage to charge the internal power supply; wherein the internal power supply is a battery; wherein the controller is configured to output the control signal to drive the heat dissipation device to dissipate heat when the self-recharging electronic device reaches a heat dissipation standard; wherein the higher the heat dissipation efficiency of the heat dissipation device, the shorter the period of the first signal and the larger the voltage value of the output voltage; wherein the output voltage is converted into a recharge current through a voltage-to-current converter to charge the internal power supply.

2. The self-recharging electronic device as claimed in claim 1, wherein the optocoupler element comprises: A light-projecting portion and a light-receiving portion are provided. The light-projecting portion is configured to project light emitted by the light source onto the light-receiving portion, and the light-receiving portion is configured to generate the first signal based on the light emitted by the light source. The heat dissipation device periodically blocks the light-receiving portion from receiving light emitted by the light source to generate the first signal with periodic level changes.

3. The self-recharging electronic device as described in claim 2, wherein the light-emitting portion is a light-emitting diode.

4. The self-recharging electronic device as described in claim 3, wherein the light-emitting diode is the light source of the self-recharging electronic device.

5. The self-recharging electronic device as described in claim 2, wherein the light-receiving portion is a photosensitive crystal.

6. The self-recharging electronic device as claimed in claim 1 further includes a voltage converter coupled between the signal converter and the charging integrated circuit, and configured to amplify the output voltage.

7. The self-recharging electronic device as described in claim 1, wherein the heat dissipation device is a fan.

8. The self-recharging electronic device as claimed in claim 1, wherein the first signal is a pulse width modulation signal.

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