Method and system for providing coupon

Abstract

[Object] To improve convenience for providing a coupon with the use of a spatial or temporal modulation component added to light that can be captured while a service is being used. [Solution] Provided is a method for providing a coupon by using a terminal device and at least one server configured to provide a service to the terminal device, the method including: capturing light while the service is being used, transmitting key information based on a spatial or temporal modulation component of the light to the server, and receiving coupon information related to the service transmitted from the server by using the terminal device; and receiving the key information from the terminal device and issuing the coupon information in accordance with the key information by using the server.

Dependencies are inferred from the claim text.