Touch sensor and radio frequency identification apparatus and method

• US 9,619,676 B2
• Filed: 12/05/2012
• Issued: 04/11/2017
• Est. Priority Date: 12/05/2012
• Status: Expired due to Fees

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Inventors: Valentine, Mark F., Shostak, Pavel A.
• Primary Examiner(s): WILSON, BRIAN P
• Application Number:
  US13/705,646
• Publication Number:
  US 20140152425A1
• Time in Patent Office: 1,588 Days
• Field of Search: 340505, 340514, 3405391, 34053916, 3405392, 34053921, 340 51, 340 101, 340 102, 340 103, 340 104, 340 105, 340 106, 340 1051, 3405721-5728, 370328, 370332, 4554221, 455423, 455446, 455448, 455 411, 455 412, 455 413
• CPC Class Codes: G06F 3/00 Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
• CPC Class Codes: G06K 19/0716 at least one of the integrated circuit chips comprising a sensor or an interface to a sensor
• CPC Class Codes: G06K 7/01 Details

Abstract

A touch sensor and RFID apparatus is described. In one implementation, the apparatus includes a passive RFID module disposed proximate to a touch panel, and a control module configured to receive an electrical signal from the passive RFID module. The apparatus may be configured to determine, based on a characteristic of the electrical signal, whether the passive RFID module has been energized by an RFID reader or, in the alternative, has exhibited an impedance change as a result of contact being made with the touch panel. The apparatus may also be configured to operate in a first mode if the passive RFID module is determined to have been energized by an RFID reader, or, in the alternative, operate in a second mode if the passive RFID module is determined to have been energized as a result of contact being made with the touch panel. Additionally, the control module can read from or write to the passive RFID module via direct electrical excitation over a wire or wires connecting the passive RFID module to the control module.

Claims

1. An apparatus comprising:

a passive RFID module;

a control module, coupled to the passive RFID module through a wired connection, configured to receive an electrical signal from the passive RFID module through the wired connection;

wherein the control module is configured to determine, based on a characteristic of the electrical signal, whether the passive RFID module has been energized by an RFID reader, or has exhibited a change of impedance as a result of the proximity of a human or a touch panel accessory;

wherein the apparatus is configured to operate in at least two modes, including;

a first mode if the control module determines that the passive RFID module has been energized by an RFID reader; and

a second mode if the control module determines that the passive RFID module has exhibited a change of impedance as a result of the proximity of a human or a touch panel accessory;

the passive RFID module is disposed proximate to a touch panel, and

in response to the determined change of impedance, the control module indicates that the human or touch panel accessory has made contact with the touch panel.

2. The apparatus of claim 1,

wherein the control module comprises a controller, a reader sensing element electrically coupled to the controller, and a touch sensing element electrically coupled to the controller,

when the characteristic of the electrical signal is that of a predetermined frequency,

the reader sensing element sends a signal to the controller,

the controller determines based on the signal received from the reader sensing element that the passive RFID module has been energized by an RFID reader,

the controller indicates to a host that an RFID reader has been detected, and

the host displays, on the touch panel, an indication of the presence of the RFID reader,

when the characteristic of the electrical signal has exhibited a change of impedance as a result of the proximity of a human or a touch panel accessory,

the touch sensing element sends a signal to the controller,

the controller determines based on the signal received from the touch sensing element that contact has been made with the touch panel,

the controller indicates to the host, that a human or touch panel accessory has made contact with the touch panel, and

the host displays, on the touch panel, an indication of the contact.

3. The apparatus of claim 2,

wherein the indication of the presence of the RFID reader is a message that alerts a user that an RFID reader is interacting with a device with which the apparatus is integrated,

and wherein the contact is made on a button that has been pressed, and the indication of the contact is the button lighting up.

4. The apparatus of claim 1,

wherein the passive RFID module comprises an RFID controller and a coil,

wherein the control module is further configured to transmit, in a third mode of the apparatus, a signal to the passive RFID module, wherein the signal contains data, and

wherein the data is written to the RFID controller.

5. The apparatus of claim 4, wherein the data that has been written to the RFID controller is readable by an RFID reader.

6. The apparatus of claim 1, wherein the passive RFID module is an NFC tag.

7. The apparatus of claim 1, wherein

the control module comprises a controller, a reader sensing element electrically coupled to the controller, and a touch sensing element electrically coupled to the controller,

in response to an RFID reader interrogating the passive RFID module, or in response to the human making contact with the touch panel in an area that is proximate to the passive RFID module, the passive RFID module outputs the electrical signal via the wired connection to the control module,

the reader sensing element is triggered only when one or more characteristics of the electrical signal received from the passive RFID module indicates that the passive RFID module is being interrogated by an RFID reader,

the apparatus operates in the first mode in response to the reader sensing element being triggered,

the controller, in the first mode of the apparatus, transmits a signal to a host, the signal indicating that an RFID reader is nearby,

the touch sensing element is triggered only when one or more attributes of the electrical signal indicate that a human is making contact with the touch panel, the human'"'"'s contact being proximate to the passive RFID module,

the apparatus operates in the second mode in response to the touch sensing element being triggered,

the controller, in the second mode of the apparatus, transmits a signal to the host, the signal indicating that the touch panel is being contacted,

the controller, in a third mode, transmits a signal containing data to the passive RFID module, wherein the passive RFID module stores the data in a memory of the controller.

8. The apparatus of claim 1, further comprising a kiosk housing, wherein:

the touch panel is disposed on the housing, the touch panel displaying a picture, the picture representing a media content option of a plurality of media content options;

the passive RFID module is disposed on the underside of the touch panel proximate to the picture,

the control module is disposed within the housing,

when the apparatus operates in the first mode, an RFID reader transmits information to the passive RFID module, the information relating to one or more of the plurality of media content options,

when a human has made contact with the touch panel proximate to the passive RFID module, the contact indicating a choice by the human of one or more of the media content options, the apparatus operates in the second mode.

9. The apparatus of claim 1, further comprising an automated teller machine comprising a housing, wherein:

the touch panel is disposed on the housing, the touch panel displaying a plurality of virtual controls, each of the plurality of virtual controls representing a function of a plurality of functions of the automated teller machine;

the passive RFID module is disposed on the underside of the touch panel proximate to a virtual control of the plurality of virtual controls,

the control module is disposed within the housing,

when the apparatus operates in the first mode, an RFID reader transmits information to the passive RFID module, the information relating to one or more of the plurality of functions,

when a human has made contact with the touch panel proximate to the passive RFID module, the contact indicating an activation by the human, of one or more of the virtual controls, the apparatus operates in the second mode.

10. The apparatus of claim 1, further comprising a doorbell housing, wherein:

the touch panel is a button on the housing;

the passive RFID module is disposed on the underside of the touch panel;

the control module is disposed within the housing,

when the passive RFID module is energized by an electromagnetic field the apparatus operates in the first mode, in which data containing identity information is transferred from the passive RFID module to the RFID reader, and

when a human has made contact with the touch panel proximate to the passive RFID module, the apparatus operates in the second mode, in which the apparatus activates a chime in response thereto.

11. A method, carried out by an apparatus, comprising:

receiving an electrical signal from a passive radio frequency identification module through a wired connection;

determining, based on a characteristic of the electrical signal, whether the passive RFID module is being energized by a RFID reader, or being energized as a result of a proximity of a human or a touch panel accessory;

if the electrical signal exhibits the characteristic of a first signal operating in a first mode, and

if the electrical signal exhibits the characteristic of a second signal, operating in a second mode;

operating in the first mode comprises receiving the first signal and displaying, on a touch panel, an indication of a presence of the RFID reader,

operating in the second mode comprises, receiving the second signal, and indicating, on a user interface, that contact has been made with the touch panel;

applying, to the passive RFID module, a continuous carrier signal that has been modulated, the continuous carrier signal being transmitted via the wired connection to the passive RFID module,

writing data to the passive RFID module using the continuous carrier signal; and

wherein the passive RFID module is disposed proximate to the touch panel, operating in the second mode is carried out when a human or a touch panel accessory makes contact with the touch panel.

12. The method of claim 11, wherein the passive RFID module is an NFC tag.

13. The method of claim 11, further comprising transmitting a response to an interrogation by the RFID reader, the response containing the data.

14. The method of claim 11, further comprising:

displaying a picture on the touch panel, the picture representing a media content option of a plurality of media content options;

in the first mode, receiving, via the passive RFID module, information relating to one or more of the plurality of media content options,

in the second mode, receiving contact from a human on the touch panel, the contact being proximate to the location of the passive RFID module, the contact indicating a choice of one or more of the media content options.

15. The method of claim 11, further comprising:

displaying a plurality of virtual controls on the touch panel, each of the plurality of virtual controls representing a function of a plurality of functions of an automated teller machine;

in the first mode, transmitting information to the passive RFID module, the information relating to one or more of the plurality of functions,

in the second mode, receiving contact by a human, the contact on the touch panel being proximate to the passive RFID module, the contact indicating an activation of one or more of the virtual controls,

executing the function corresponding to the virtual control indicated by the contact.

16. A mobile device comprising:

a host processor;

a touch panel;

a passive RFID module disposed proximate to the touch panel;

a control module communicatively linked to the host processor and electrically coupled to the control module, the control module comprising

a controller,

a reader sensing element,

a signal generator, and

a touch sensing element,

each of the reader sensing element, signal generator, and touch sensing element being electrically coupled to the controller,

wherein the control module operates in at least four modes, including

a first mode, in which the passive RFID module is energized by an RFID reader, thereby inducing a signal, and the signal passes from the passive RFID module to the reader sensing element, which responds by outputting a signal indicating to the controller that an RFID reader is interrogating the passive RFID module;

a second mode, in which the passive RFID module is energized by a human touch, thereby inducing a signal, and the signal passes to the touch sensing element, which responds by outputting a signal indicating to the controller that the touch panel is being touched;

a third mode, in which the signal generator modulates a signal containing data output by the controller, and provides the modulated signal to the passive RFID module, thereby writing data to the passive RFID module; and

a fourth mode in which the signal generator modulates a signal containing an interrogation command output by the controller, and provides the modulated signal to the passive RFID module, which responds by providing the data to the controller.