Warning tag and method for providing an indication relevant to shelf life of a product

摘要

A warning tag for providing an indication relevant to shelf life of a product is to be disposed on a product. The warning tag includes a storage unit, a clock unit, a control unit and a warning unit. The storage unit stores product information of the product. The product information includes time data associated with end of the shelf life of the product. The clock unit generates a current time. The control unit is electrically coupled to the storage unit and the clock unit, and outputs a warning signal based on the current time and the end of the shelf life of the product. The warning unit is electrically coupled to the control unit, and generates the indication according to the warning signal.

主权项

1. A method for providing an indication relevant to shelf life of a product, said method to be implemented by a warning tag disposed on the product, said method comprising:
(A) accessing time data associated with end of the shelf life of the product, and a current time; (B) making a first determination as to whether the current time corresponds to or has exceeded the end of the shelf life of the product; (C) configuring the warning tag to generate the indication in a first mode when a result of the first determination is affirmative; (D) when the result of the first determination is negative, making a second determination as to whether the current time corresponds to an about-to-end time which approaches but does not exceed the end of the shelf life of the product; and (E) configuring the warning tag to generate the indication in a second mode when a result of the second determination is affirmative.