PSFK » Stored-Value Card Displays Remaining Balance
US based Urbanscale has developed a stored-value card with an embedded e-ink display that shows how much value remains on the card. Project PERRYtakes the traditional RFID-based stored-value card, used in many cities for mass transit fare cards, and laminates an e-ink display to the card. The same flow of current through the radio-frequency antenna that energizes the card’s logic also updates the display. And since e-ink is “non-volatile” — the display only draws power during a change of state — the new value ought to be legible for weeks or even months thereafter. The company developed the card, along with their other work, with the purpose of using technology to improve the life throughout modern “smart cities.”
