Card with dynamic shape memory alloy tactile feature
A transaction or identification card has a width, a length, and at least one planar surface extending across the width and length. The card includes a dynamic feature including an actuator having an inactivated position and an activated position, wherein the inactivated position has at least one reversible difference from the inactivated position relative to the planar surface of the card.
1. A transaction or identification card having a width, a length, and at least one planar surface extending across the width and length, the card comprising:
a dynamic feature comprising an actuator having an inactivated position and an activated position, wherein the inactivated position has at least one reversible difference from the activated position relative to the planar surface of the card; and
wherein the dynamic feature comprises a shape memory alloy having the inactivated position in a first material state of the alloy and the activated position in a second material state of the alloy, wherein the first state is different from the second state.
2. The transaction card or identification card of claim 1 , wherein the at least one difference comprises a tactile difference perceptible to human touch.
3. The transaction or identification card of claim 1 , wherein the dynamic feature has an exposed planar surface that is disposed substantially flush with the at least one planar surface of the card in the inactivated position and offset relative to the at least one planar surface of the card in the activated position.
4. The transaction or identification card of claim 3 , wherein the dynamic feature comprises the actuator disposed in a cutout in the surface of the card, with a covering over the actuator, wherein the covering lies flush with the at least one planar surface of the card in the inactivated position.
5. The transaction or identification card of claim 4 , wherein the covering comprises printed indicia.
6. The transaction or identification card of claim 5 , wherein the printed indicia comprises a logo corresponding to an issuer or sponsor of the card.
7. The transaction or identification card of claim 1 , wherein the at least one planar surface comprises metal.
8. The transaction or identification card of claim 1 , wherein the card comprises a circuit comprising the actuator and configured to connect to a power source, the circuit configured to provide sufficient power to the actuator when connected to the power source to cause the actuator to move from the inactivated position to the activated position.
9. The transaction or identification card of claim 8 , wherein the shape memory alloy has the inactivated position in a relaxed material state of the alloy and the activated position in a deformed material state of the alloy, wherein the relaxed state is different from the deformed state and the power is sufficient to cause the shape memory alloy to transition from the relaxed state to the deformed state.
10. The transaction or identification card of claim 8 , wherein the power source comprises a battery embedded in the card.
11. The transaction or identification card of claim 8 , wherein the power source comprises a terminal configured to receive a set of metal contacts, and the card comprises metal contacts on at least one surface of the card positioned for mating with the terminal.
12. The transaction or identification card of claim 8 , wherein the power source comprises transmitted power and the card comprises an antenna configured to receive the transmitted power.
13. The transaction or identification card of claim 12 , wherein the circuit comprises an inductive RF circuit.
14. The transaction card of claim 8 , further comprising an RF receiver or transceiver configured to receive a signal operable to cause the actuator to actuate.
15. The transaction card of claim 14 , wherein the RF receiver or transceiver is configured to receive the signal via short-range wireless technology.