Microsoft was recently granted a patent (filed for in 2015) for an “electronic paper display device” that features an “electrophoretic ink layer” and electrodes that could, when electricity is applied, be used to display text and images. The full patent is available here.
Smaller sized displays could replace paper while larger displays could be used for advertising that could be more readily changed compared to their traditionally printed counterparts.
Source: http://buff.ly/2jIfg44
