No explanation needed in this case. Tomi T Ahonen from Communities Dominate Brands explains it all.
"And still while I'm on 2D Barcodes, some interesting updates. We've
talked about this invention from South Korea. I think we've blogged
already that when they launched these in Japan on the NTT DoCoMo
network, in 18 months, 54% of the total phone user base had started to
use the 2D barcode scanner on their phones. It is that compelling. It
is like magic, you can get web addresses appearing on your phone with
But what Ecrio does, is not this 2D Barcode. They are thinking very laterally about the mobile phone and other technologies. They have developed an Infra-Red (IR) barcode. Yes, its an IR beam that is pulsated that it contains a data stream. You can have an IR transceiver which is the size of the thumb-end of a pen. Or you can use the IR transmitter that is on many PDAs and mobile phones. But now the beauty is, that an IR beam is not "limited in size" in the same way as a square of 2D barcode space is. So we can transmit much larger volumes of data in the IR beam."