What are QR Codes? How do they work?

Introduction

In today's rapidly digitalising world, the boundaries between the physical and digital realms are becoming increasingly blurred. QR codes have become one of the most visible tools of this transformation, taking centre stage in our daily lives. They play an active role in numerous areas, from menus to payments, identity verification to digital business card solutions. Understanding QR technology today means understanding not only the technology itself, but also modern user behaviour.

What is a QR Code?

QR (Quick Response) codes are a special type of barcode that stores information in two-dimensional square patterns. They can be scanned in seconds using smartphones and optical readers, providing direct access to digital content.

The basic functions of QR codes:

• Redirecting to websites
• Accessing files and documents
• Sharing locations
• Integrating payment systems
• Presenting menus and catalogues
• Digital business card solutions

History of QR Codes

QR code technology was developed in Japan in 1994 by the company Denso. Its initial purpose was to eliminate manual price entry at supermarket checkouts. Thanks to the POS infrastructure integrated with barcode scanning systems, product information began to be automatically transferred to the checkout.

Over time, this system expanded:

• From the retail sector
• To restaurant menus
• To payment infrastructures
• Banking systems
• Event management
• Corporate digital solutions

and became a global standard.

How are QR Codes Read?

While classic barcodes store information on a single axis (horizontal), QR codes store information on both horizontal and vertical axes. This allows them to hold much more data.

This structure enables:

• Faster scanning
• Greater data storage capacity
• Lower error rates
• Increased resistance to physical damage

How Do QR Codes Work?

QR codes encode information in square modules (blocks). Data types include:

• Numeric
• Alphanumeric
• Byte mode
• Kanji

Structural Components of a QR Code:

Position Markers: Three large squares at the corners – ensure readability from any angle

Timing Pattern: Regulates the alignment of the squares

Version Information: Determines the data capacity of the QR code

Quiet Zone: The empty space around the QR code

Format Information: Error correction and scanning direction information

Data Modules: The central area where the actual data is stored

Alignment Marks: Enables scanning from different angles

Types of QR Codes

 Static QR Code

• Cannot be changed
• Cannot be edited
• Cannot be tracked
• Not suitable for campaign management
• Only carries fixed information

Dynamic QR Code

• Can be edited
• Can be tracked
• Generates analytical data
• Campaign management is possible
• Can be integrated into retargeting systems

Frequently Asked Questions

Are QR codes secure?

It is secure when generated with the right systems. However, QR codes from unknown sources may pose a risk.

Does a QR code require the internet?

Internet is required if the content the code directs to is online.

How much data can QR codes store?

It varies by version; thousands of characters of data can be stored.

Where are QR codes used?

Payment systems, restaurants, business cards, event admissions, advertising campaigns, e-commerce, corporate identity management.

Conclusion

QR code technology is no longer just a scanning tool; it is a gateway to the digital world. This system, which transforms physical touchpoints into digital experiences, provides speed, efficiency and measurability for brands.

Trowas Digital Business Card is at the heart of this transformation, turning QR technology into more than just a link, but a tool for corporate identity and professional representation.

Trowas is the benchmark for a reliable, sustainable and modern stance in the digital world.