Hon Hai Precision Industry Co., Ltd.

Tsinghua University

Fu Tai Hua Industry (Shenzhen) Co., Ltd.

Li-Hong Li

Jun Lu

Ya-Dong Li

Qing Peng

Cai-Yun Nan

A laser marking method for an electronic device with a projector and a projection screen includes first and second microwaves being received by microwave receivers on corners or elsewhere of the projection screen. First and second microwave transmitters in a laser pen transmit the microwaves. Time intervals between transmissions and receptions of the microwaves are acquired. Distances between each of the microwave receivers and each of first and second microwave transmitters are calculated, to establish a three-dimensional rectangular coordinate system. Coordinate value of a point on the screen struck by laser beam (drop point) from the pen is calculated. The method allows for marking the drop point on the screen and also for marking a series of drop points with a line when the laser beam moves across the screen.

Electronic device with laser marking function and laser marking method

A cathode composite material includes a cathode active material and a coating layer coated on a surface of the cathode active material. A material of the coating layer is a lithium metal oxide having a crystal structure belonging to C2/c space group of the monoclinic crystal system. The present disclosure also relates to a lithium ion battery including the cathode composite material.

Cathode composite material, method for making the same, and lithium ion battery using the same

Growing community of inventors

Shenzhen, China

Li-Hong Li