Stored-Value Card Displays Remaining Balance
Urbanscale has developed an enhanced stored-value card that aims to reduce frustration among mass transit commuters.
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 PERRY takes 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.