Method for authorized use of projector

A method for authorized use of a projector, the method comprising:

• scanning a quick response (QR) code that is displayed by the projector by means of projection, decoding the QR code to obtain a corresponding license, and extracting an address of a projector authorization server from the license;
• obtaining a local terminal identifier, and transmitting the local terminal identifier and the license to the projector authorization server corresponding to the address of the projector authorization server, wherein the projector authorization server performs verification on the license, and the license comprises authorization information and the address of the projector authorization server;
• and
• receiving verification information that is generated by the projector authorization server in response to verification by the projector authorization server on the local terminal identifier and the license being successful, wherein the verification information is inputted to the projector, and the projector performs local verification on the verification information and obtains use authorization corresponding to the authorization information in response to the local verification being successful.