Payment cards and devices for displaying barcodes

摘要

A payment card is provided with a display. A barcode may be selectively displayed on the display. A display may be an electrochromic display in order to increase the readability of a displayed barcode with respect to computer vision equipment. A barcode may be selected by a user from a set of barcodes. Each barcode in a set of barcodes may correspond to a different loyalty account for a different merchant. Accordingly, a user can carry a single card—but may be able to communicate multiple loyalty account barcodes to computer vision equipment across multiple merchants.

主权项

1. A payment card comprising:
a display operable to display a barcode; a battery; a dynamic magnetic stripe communications device operable to communicate data to a magnetic stripe reader; and a button, wherein said data includes barcode data in a discretionary data field of magnetic stripe track data.