emart introduces the worlds first shadow QR code
In an attempt to increase sales during emart’s slowest period, they introduced a special QR code at locations across Korea. The code itself is only scannable during 12pm and 1pm when the sun passes over it and casts the correct shadow for it to work. People were rewarded with 25% off vouchers for their effort. It’s a unique use of the QR code technology, and a nice way of driving purchase at an otherwise slow time.