Primax Electronics Ltd.

Yung-Hsien Ho

Hung-Wei Chiu

Chun-Hao Lo

A wireless power transmission device includes a main body, a first transmitter coil and a second transmitter coil. The second transmitter coil is stacked over the first transmitter coil. If the wireless power transmission device is operated in a detecting mode, a magnetic flux is generated by the first transmitter coil and oriented in the direction toward the top surface of the main body. The magnetic flux is attenuated by the overlying second transmitter coil. Consequently, the electromagnetic wave is inhibited. If the wireless power transmission device is operated in a charging mode, both the first transmitter coil and the second transmitter coil are controlled to transmit magnetic fluxes. Since the intensity of the electric power is increased, the charging efficiency is enhanced.

Wireless power transmission device

A wireless power transmission device includes a main body, a first transmitter coil and a second transmitter coil. The second transmitter coil is partially stacked over the first transmitter coil. If the wireless power transmission device is operated in a detecting mode, a magnetic flux oriented in the direction toward the top surface of the main body is generated by the first transmitter coil. The magnetic flux is attenuated by the second transmitter coil. Consequently, the electromagnetic wave is inhibited. If the wireless power transmission device detects that an electronic device is located near the first transmitter coil, the first transmitter coil is controlled to be in a charging mode to transmit the magnetic flux to the electronic device, and the magnetic flux is no longer attenuated by the second transmitter coil.

A wireless charging device and an electric energy recycling method are provided. The wireless charging device includes a casing, a transmitter coil, a recycling coil and a recycling battery. When a magnetic flux is generated by the transmitter coil, a first portion of the magnetic flux is transmitted to an electronic device, and a second portion of the magnetic flux is recycled by the recycling coil. The second portion of the magnetic flux is converted into a charging current by a charging unit, so that the recycling battery is charged by the charging current.

Growing community of inventors

Taipei, Taiwan

Yung-Hsien Ho