Patent ID: 8008887
Filing Date: 2011-08-30
Classification: H01L,H02J,H02S,Y02E

Abstract:
1. A portable multi-voltage solar cell charger comprising: at least one solar cell plate holding a plurality of solar cells which are molded and arranged in at least one of series or parallel; a film formed on the solar cell plate, the film having a reformed surface to reduce reflection of sunlight; a power control part supplying a load side with power generated from the solar cells after automatically perceiving a voltage required from the load side; and a case holding the solar cell plate and the power control part, the case combining at least one portable electronic device with a charging device, wherein the power control part comprises a step-up switching regulator, a step-down switching regulator, and a control circuit, and wherein the control circuit comprises: an A/D converter perceiving a voltage required from the load side and converting the perceived voltage into a digital value; a microprocessor determining the voltage required from the load side using the digital value; a D/A converter converting the voltage determined from the microprocessor into an analog value; a comparator comparing the analog value from the D/A converter with an output from the solar cell plate; and an AND gate integrating a signal from the comparator and a signal from a pulse generator and adjusting the output from the solar cell plate.