A high-brightness display is particularly important if your chosen location is subject to sunlight or bright lighting. Many consumer-grade displays simply aren’t bright enough for the average retail or storefront location and you’ll want to look at brighter industrial-grade displays for such locations.

Contrast ratios and black levels are important but less critical for digital signage than, say, a screen to show movies on. Typically you will design your content to ensure that your text has very high contrast against the background image or video and that makes the absolute blackness or final contrast less important than a screen for watching movies.

Next –> Digital photo frames as Digital Signs