E Ink

E Ink (electronic ink) is a display that has high brightness and contrast, a wide viewing angle, and uses very little power, making it suitable for applications that replace paper such as digital book readers. Within retail, he technology has been used for shelf edge label displays where the display is battery powered. The digital shelf edge label reduces the labour costs for price changes and enables the retailer to dynamically change pricing based on yield. To date only a small number of installations have been spotted in tier 1 retail and largely constrained to grocery retail.