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.

One 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 can be updated remotely.

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 enlarging the code can improve scan success rates.