We have seen E Ink displays being used innovatively, but it is interesting to see them used as part of passenger handles on a commuter train. As ITHome reported, such 4G-enabled bright passenger handles have been deployed by advertising firms on the Shenzhen Metro Line 4 trains. Specifically, each intelligent handle uses a pair of 5.56-inch colour e-paper that can be used for … [Read more...] about Color E Ink displays now used for ads on passenger handles on commuter trains