Patent ID: 8736179

Claim:
A lighting apparatus with hybrid power supply, comprising: a light-emitting diode (LED) module; a solar module, electrically connected to the LED module, in which the solar module receives a light energy and converts the light energy into electrical energy before outputting a solar electric power and transmitting the solar electric power to the LED module; an auxiliary power module, electrically connected to the LED module and an exterior power source, in which the auxiliary power module receives a power of the exterior power source and transmits an auxiliary electric power to the LED module; and an electric power selection circuit electrically connected to the LED module, the solar module, and the auxiliary power module, in which the electric power selection circuit determines whether to transmit the auxiliary electric power or the solar electric power to the LED module according to a voltage of the solar electric power; wherein the electric power selection circuit comprises: a first switch unit, electrically connected between the LED module and the solar module; a second switch unit, electrically connected between the LED module and the auxiliary power module; and a voltage level detection circuit, electrically connected to the solar module, the first switch unit, and the second switch unit, in which the voltage level detection circuit compares a voltage of the solar electric power outputted by the solar module with a predetermined value before preparing a comparison result, which serves as a basis for a control of the first switch unit and the second switch unit; wherein if the comparison result indicates that the voltage of the solar electric power is greater than the predetermined value, the voltage level detection circuit turns on the first switch unit and turns off the second switch unit, otherwise the voltage level detection circuit turns off the first switch unit and turns on the second switch unit.