Digital Signage

Digital signage uses LCD displays or LED panels to show advertisements, directions, and information in high-traffic locations like stations, malls, and hospitals. Combined with QR codes, one-way information display becomes two-way interaction.

The key advantage is dynamic content switching. Different QR codes can display by time of day: news in the morning, lunch coupons at noon, restaurant reservations in the evening. Unlike printed QR codes requiring physical replacement, digital signage updates remotely and instantly.

Technical considerations include screen brightness (too high causes camera washout, too low reduces contrast) and refresh rate interference with camera shutter speed causing flicker. Setting a solid white background for the QR code area and sizing the code at 30% or more of the screen improves scan success rates.