| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic coupon displaying a win result by erasing one portion of a display region.SOLUTION: An electronic coupon Cp001 in a two layer structure distributed from an electronic coupon distribution device in a display unit 150 of a portable terminal 150 is composed from a first layer Ly1 and a second layer Ly2. When a user uses the electronic coupon, display of the same portion in the second layer Ly2 is started by erasing the first layer Ly1. The user is capable of starting the use of the electronic coupon Cp001 only in an area assigned by a position specifying function of the portable terminal. Lottery is started when an erasure rate to total area of the first layer Ly1 specified beforehand is reached and the result is displayed to the second layer Ly2. |
