Implementation of Optical Wireless Charging System

Abstract

Science and technology are continuously developing, especially in the field of wireless power transmission technology, so major tech companies are competing to develop their products to keep pace with this development to provide the best services to their customers. This project aims to design and implement a prototype wireless charger for indoor usage, and 10 cm operational range. The device was relied on the basis of the principle of optical power transmission using infrared technology. The prototype consists of a transmitter, a receiver, a controller, and a load (smart phone), the transmitter sends optical beams through an array of IR LEDs, which received by the photovoltaic cell which is connected to the phone. The importance of the controller is to cut off the rays of the transmitter when intercepted by any object, thus safety concerns were considered. The results showed the possibility of charging the smart phone at a distance of up to 30 cm and the possibility of detecting an object presence within a range of one meter, with a response accuracy of 750 milliseconds, but it was found that the overall efficiency of the system is less than expected due to the low quality of the materials used.