Contactless data communication system, contactless identification tag and contactless identification tag control program

• US 7,538,677 B2
• Filed: 09/26/2006
• Issued: 05/26/2009
• Est. Priority Date: 03/14/2003
• Status: Expired due to Fees

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Kurosawa, Hirofumi, Hoshina, Masaki
• Primary Examiner(s): Lee; Benjamin C
• Assistant Examiner(s): Pham; Lam P
• Application Number:
  US11/535,189
• Publication Number:
  US 20070018827A1
• Time in Patent Office: 973 Days
• Field of Search: 340/568.1, 340/568.2, 340/568.3, 340/568.4, 340/568.5, 340/572.1, 340/572.3, 340/572.8, 340/686.1, 340/686.4, 340/687, 340/10.1, 340/10.42, 340/10.52, 235/375, 235/385, 235/492
• US Class Current: 340/572.1
• CPC Class Codes: G08B 13/1427 with transmitter-receiver for distance detection

Abstract

A contactless data communication system includes a reader-writer device, a contactless identification tag including a plurality of contactless identification tags, and baggage including multiple pieces of baggage. The reader-writer device includes a data reception part, a data transmission part, a control part, an operation part, and a display part. The contactless identification tag includes a data communication part, a data control part, a voltage monitoring part, a detachment detection part, a display processing part, and an electrophoresis display device. The voltage monitoring part and the detachment detection part detect a voltage change caused when the contactless identification tag is detached from the baggage, so as to detect that the contactless identification tag is detached.

Claims

1. A contactless identification tag for attaching to an object, the contactless identification tag comprising:

a driving electric power generation part;

a first data reception part;

a first data transmission part;

a detachment detection part including a first detective resistor part and second detective resistor part that is electrically coupled to the first detective resistor part;

a control part including a voltage monitoring part that is electrically connected to a joint part through which the first detective resistor part is electrically coupled to the second detective resistor part; and

an adhesion part including a first adhesion part and a second adhesion part, the second adhesion part being separable from the first adhesion part, the first detective resistor part being formed on the second adhesion part, and a wiring of the first detective resistor part being contacted to a wiring included in the detachment detection part with a combining force strength that is weaker than a strength of an adhesive force with which the first adhesion part is attached to the object.

2. The contactless identification tag according to claim 1;

the driving electric power generation part generating driving electric power from carrier waves of a reader-writer device and supplying the driving electric power to each part of the contactless identification tag,

the control part controlling to an operation of each part of the contactless identification tag, and

the contactless identification tag being attached to the object through the adhesion part.

3. The contactless identification tag according to claim 1 wherein;

the second adhesion part being separated from the first adhesion part when the contactless identification tag that has been attached to the object by the adhesion part is detached from the object;

the first detective resistor part and the second detective resistor part being electrically disconnected when the second adhesion part is separated from the first adhesion part, and

the contactless identification tag judging whether the contactless identification tag is detached or not when the voltage monitoring part detecting a voltage change caused by the disconnection of the first detective resistor part and the second detective resistor part.

4. The contactless identification tag according to claim 1 further comprising:

a display, the display displaying an information that the contactless identification tag is detached from the object is displayed to the display when detecting that the contactless identification tag is detached from the object.

5. A contactless data communication system, comprising:

a reader-writer device; and

a contactless identification tag that is claimed in claim 1,

the reader-writer device including;

a second data reception part; and

a second data transmission part that is able to communicate with the contactless identification tag without any direct contact,

after the contactless identification tag that has been attached to the object is detached from the object and the contactless identification tag receives carrier waves from the second data transmission part, the detachment detection part and a voltage monitoring part of the contactless identification tag being able to detect that the contactless identification tag is detached from the object, and

the contactless identification tag being able to transmit information that the contactless identification tag is detached from the object to the reader-writer device through the first data transmission part.

6. A contactless data communication system, comprising:

a reader-writer device; and

a contactless identification tag that is claimed in claim 4,

the reader-writer device including;

a second data reception part; and

a second data transmission part that communicates with the contactless identification tag without any direct contact,

after the contactless identification tag that has been attached to an object is detached from the object and the contactless identification tag receives carrier waves from the second data transmission part, the detachment detection part and the voltage monitoring part of the contactless identification tag being able to detect that the contactless identification tag is detached from the object,

the contactless identification tag being able to transmit an information that the contactless identification tag is detached from the object to the reader-writer device through the first data transmission part, and

the contactless identification tag being able to display the information to the display.