The laser pointer principle can realize the user identification technology

User identification wireless control laser pen and multi-user point recognition technology, its characteristics include: user identification wireless control laser pen: laser pen shell, laser transmitting circuit and wireless transmitting circuit, and has a handle writing and writing and other operating modes; Wireless signal receiver: wireless signal receiving and processing circuit, high and low level conversion circuit and MCU; The operation signal is used to determine the user using the trigger laser pointer and match the user with the spot trajectory when multiple users are used together; Distinguish multiple users at the same time, and support parallel use of multiple users without conflicts. It can serve as a place for meetings and discussions, and multiple users can use and interact with the large projection screen at the same time. Laser pointer to provide instructions, marking, lock screen and other functions, more conducive to the user in the above environment of computer control; Chinese patent 03140513.4 provides a combination of wireless control module and laser pen special device to control multimedia presentation technology solutions, but do not identify the laser point, the laser point of the laser pen only play a guiding role; At the International Conference CHI2001, DanR. This paper summarizes the laser point recognition technology, proposes the use of laser point recognition technology to simulate the operation of the mouse, and has been improved in the subsequent research. Like all known inventions and designs, they are focused on single use. With the wide application of wireless control technology, the new demand for laser pointer is expanding: in multi-person conference, business demonstration, multimedia interactive teaching, military decision-making and other environments, multiple wireless control devices cooperate to operate the computer.