Principle of QR code

pu1. If you want to know more information about the QR code, you can go to the address below, which is the official website of the QR code. Denso Wave, which made the QR code, is a Japanese company, but the homepage below supports Korean.
http://www.qrcode.com/ko/index.html

2017-12-14

OK

pu2. In 1994, it was created by Denso Wave, a subsidiary of Toyota Motor Corporation in Japan, and when Denso Wave refused to claim the QR code patent, QR code began to spread rapidly. And with the advent of the mobile phone era, QR codes became very widely used. The amount of data that can be put in is 7,089 numbers, 4,296 alphabetic characters, and 2,953 binaries, but the most commonly used in mobile phones is the URL of the application or site address

2017-12-14

OK