Source: https://patents.google.com/patent/US8604995B2/en
Timestamp: 2018-04-22 22:14:34
Document Index: 114212263

Matched Legal Cases: ['Application No. 200880024860', 'Application No. 200880024860', 'Application No. 08769787', 'Application No. 08020393', 'Application No. 08769787', 'Application No. 2010', 'Application No. 2010']

US8604995B2 - Shielding of portable consumer device - Google Patents
US8604995B2
US8604995B2 US11811875 US81187507A US8604995B2 US 8604995 B2 US8604995 B2 US 8604995B2 US 11811875 US11811875 US 11811875 US 81187507 A US81187507 A US 81187507A US 8604995 B2 US8604995 B2 US 8604995B2
US20080303632A1 (en )
Embodiments of the present invention allow for secure wireless communication between a portable consumer device that includes stored information and an interrogation device. A consumer or other type of user can choose whether or not he or she wants allow an interrogation device to interrogate the portable consumer device. In embodiments of the invention, a shield that blocks, absorbs, attenuates, or otherwise inhibits coupling of electromagnetic radiation may be movably coupled to a base portion of the portable consumer device that includes at least an antenna. The shield controls whether the device can be interrogated for its stored information. To enable interrogation of the portable consumer device, a user such as a consumer may be required to move the shield to a distal (e.g., an open position). If the shield is in a proximate (e.g., closed position), the portable consumer device cannot be interrogated with an interrogation device. Stated differently, when a majority of the shield is closer to the antenna, it cannot be interrogated by the interrogation device. When the shield is farther from the antenna, it can be interrogated by the interrogation device. Many of the specific examples described below refer to the shield being in an “open” or “closed” position, but are not limited thereto. For example, in a distal position, the shield may cover less of the lateral area of the antenna, while in the proximate position, the shield may be moved to cover more of the antenna. In the distal position, the memory can be interrogated via the antenna. In the proximate position, the memory cannot be interrogated via the antenna.
FIG. 4 shows portable consumer device 200(a) when shield 225 is in a closed position, having swung closed about hinge 215, rendering the device incapable of communicating with contactless reader 120. Communication link 150 is broken when front face 226 of the device is disposed toward the contactless reader 120 because shield 225 is disposed between transmitting antenna 214 and the contactless reader 120. It should be understood that communication link 150 remains broken when rear face 216 of the device is disposed toward contactless reader 120 because base portion 210 is also electromagnetically shielded. For example, in some embodiments where processor 212 and antenna 214 are disposed on a semi-conductor chip, rear face 216 can be electromagnetically shielded by a backing material of the chip. A metal sheet/mesh or metallic coating on a plastic body panel of base portion 210 can also be used to provide shielding.
Also, as shown by another configuration of the portable consumer device 200(b), the antenna 214 may be disposed between the contactless reader 120 and the antenna 225. The region between the antenna 225 and the reader 120 may be free of a shield. The shield 225 may be larger than the antenna 214 (or may be otherwise configured to achieve the same result), so that the shield can act as a ground effectively preventing interrogation via the antenna 214. Thus, as shown in FIG. 4, interrogation of the portable consumer device via the antenna 214 can be prevented, regardless of the orientation of the portable consumer device.
FIGS. 5A and 5B show a portable consumer device 300 in accordance with another embodiment of the present invention in which the portable consumer device is implemented as a hinged key fob. Key fob 300 includes a hinge 315 about which the body portions 310 and 320 can be rotated to open or close the key fob. Base portion 310 includes a processor (not shown) and transmitting antenna 314 as previously described. Shield portion 320 includes or constitutes an electromagnetic shield 325 as previously described for blocking electromagnetic radiation from reaching antenna 314.
a memory for storing information including credit or debit card information, wherein the information is in the form of Track 1 or Track 2 data;
a first antenna coupled to the processor;
a second antenna coupled to the processor and associated with a base portion of the portable consumer device, and configured to communicate with an interrogation device using short range RF communication;
a shield portion comprising a shield coupled to the base portion, the shield comprising conductive material, wherein the shield is configured to electronically load the second antenna such that the second antenna couples a substantially attenuated version of an interrogation signal to the portable consumer device;
a movable element coupling the base portion and the shield portion and capable of moving the shield portion between a proximate position and a distal position and wherein the shield is configured to cover only a portion of the second antenna when the shield is in the proximate position, and wherein the movable element is configured to bias the shield portion to be in the proximate position;
wherein the portable consumer device is a phone.
2. The device of claim 1 wherein the shield in the proximate position is configured to prevent communication between the interrogation device and the second antenna when the portion of the second antenna is between the interrogation device and the shield.
3. The device of claim 1 wherein the portable consumer device is capable of being interrogated by the interrogation signal generated by the interrogation device when the shield is in the distal position.
4. The device of claim 1 wherein the second antenna generates power from the received interrogation signal.
5. The device of claim 4 wherein the interrogation signal comprises data to be stored in the memory.
6. The device of claim 1, wherein the second antenna is a near field antenna.
7. The device of claim 1, wherein the second antenna is coupled to a power source disposed within the portable consumer device.
9. A method of using the portable consumer device of claim 1, the method comprising:
10. The method of claim 9 wherein the portable consumer device is placed within about 10 inches or less of the interrogation device.
11. The portable consumer device of claim 1 wherein the shield is electronically floating relative to a ground potential of the second antenna.
12. The portable consumer device of claim 1 wherein the second antenna is configured to communicate with an external terminal at a frequency of about 13.56 MHz.
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US20080303632A1 (en) 2008-12-11 application