Transient state information display in an RFID tag having a charge-induced pigment release medium
First Claim
1. A method of communicating information about a product, the product having a sensor, comprising:
- associating a radio frequency identification (RFID) tag with the product, the RFID tag having a display, the display including a charge-induced pigment release medium;
in response to receipt, at the RFID tag, of a signal that includes a first value associated with a given characteristic associated with the product, comparing the first value to a second value generated by the sensor in response to receipt of the signal; and
applying a charge to the charge-induced pigment release medium to display an indication on the display that is a function of the comparison.
1 Assignment
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Accused Products
Abstract
An RFID tag includes a sensor for determining a transient state or condition of a product to which the tag is associated, and a display. The tag may be passive, semi-passive, or active. In response to receipt at the tag of a read signal that includes a first value associated with the transient state or condition, a comparison is performed. The comparison compares the first value, with a second value generated by the sensor in response to receipt of the read signal. As a result of the comparison, an indication is provided on the display. The information displayed is a function of the comparison. In one embodiment, the display provides different color indications depending on the transient state or condition sensed. In an alternative embodiment, the RFID tag display includes an electrical or thermal charge-induced pigment release medium, e.g., an electronic ink, and the tag is used to communicate information about the state of a product to which the tag is associated.
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Citations
23 Claims
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1. A method of communicating information about a product, the product having a sensor, comprising:
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associating a radio frequency identification (RFID) tag with the product, the RFID tag having a display, the display including a charge-induced pigment release medium; in response to receipt, at the RFID tag, of a signal that includes a first value associated with a given characteristic associated with the product, comparing the first value to a second value generated by the sensor in response to receipt of the signal; and applying a charge to the charge-induced pigment release medium to display an indication on the display that is a function of the comparison. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An RFID tag, comprising:
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a sensor; a display including a charge-induced pigment release medium; a processor; and a set of program instructions executable by the processor to perform the following method; in response to receipt of a signal that includes a first value associated with a given characteristic of a product with which the RFID tag is associated, comparing the first value to a second value generated by the sensor in response to receipt of the signal; and applying a charge to the charge-induced pigment release medium to display an indication on the display that is a function of the comparison. - View Dependent Claims (8, 9, 10, 11)
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13. An RFID system, comprising:
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a reader that generates an interrogation signal; and a set of RFID tags, at least one tag comprising; a sensor; a display including a charge-induced pigment release medium; a processor; and a set of program instructions executable by the processor to perform the following method; in response to receipt of the interrogation signal that includes a first value associated with a given characteristic of a product with which the RFID tag is associated, comparing the first value to a second value generated by the sensor in response to receipt of the interrogation signal; and applying a charge to the charge-induced pigment release medium to display an indication on the display that is a function of the comparison. - View Dependent Claims (14, 15, 16, 17)
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18. An enterprise RFID system, comprising:
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an RFID controller; one or more RFID readers coupled to the RFID controller; one or more RFID tags wirelessly coupled to a one of the RFID readers, at least one tag comprising; a sensor; a display including a charge-induced pigment release medium; a processor; and a set of program instructions executable by the processor to perform the following method; in response to receipt of an interrogation signal from an RFID reader that includes a first value associated with a given characteristic of a product with which the RFID tag is associated, comparing the first value to a second value generated by the sensor in response to receipt of the interrogation signal; and applying a charge to the charge-induced pigment release medium to display an indication on the display that is a function of the comparison. - View Dependent Claims (19, 20)
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21. A computer program product including computer program instructions for carrying out the following method steps in an RFID tag, the RFID tag having a sensor, and a display including a charge-induced pigment release medium:
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in response to receipt of a signal that includes a first value associated with a given characteristic, comparing the first value to a second value generated by the RFID tag sensor in response to receipt of the signal; and applying a charge to the charge-induced pigment release medium to display an indication on the display that is a function of the comparison. - View Dependent Claims (22, 23)
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Specification