Radio frequency identification device with visual indicator
An RFID device includes a chip, an antenna operatively coupled to the chip, and a visual indicator operatively coupled to the chip. The visual indicator provides a visual indication of an operative state of the device. The visual indication may be human readable and/or machine readable, and may provide visual indication that is dependent on a change in an operative state of the device. The operative state that triggers the visual indication may include a state in which the chip has temporarily or permanently been rendered inoperative or disabled, that is, in which the chip no longer responds to, or otherwise interacts with, ordinary incoming RF signals such as from a device reader. The visual indicator may be included in a display that functions by any of a variety of suitable mechanisms, such as by use of electrochromic materials, thermochromic materials, liquid crystals, or chemically-reactive materials.
1. A method of using a radio frequency identification (RFID) device, the method comprising:
disabling normal operation of the device, thereby placing the device in a disabled state; and
a visual indicator providing a visual indication on a display of the device, wherein the visual indication indicates the disabled state; and
wherein the visual indicator selectively displays or obscures underlying printed material under the display.
2. The method of claim 1 , wherein the disabling includes sending a signal to the device that instructs a chip of the device to go into the disabled state.
3. The method of claim 2 , wherein the disabling includes activating the display, to display the visual indication, upon receipt by the chip of the signal activating the display.
4. The method of claim 3 , wherein the activating includes applying high voltage to a contact of the chip that is electrically connected to the display.
5. The method of claim 1 , wherein the disabling includes permanently putting the device into the disabled state.
6. The method of claim 1 , wherein the disabling includes temporarily putting the device into the disabled state.
7. The method of claim 1 , wherein the visual indication on the display of the device includes permanently displaying the visual indicator, such that the visual indicator is displayed even after the device no longer powers the display.
8. A method of using a radio frequency identification (RFID) device for merchandise validation, comprising the steps of:
providing an RFID device, the RFID device including a chip, an antenna operatively connected to the chip and a display operatively connected to the chip;
connecting the RFID device to an item of merchandise;
sending signals to the RFID device to display a visual indication; and
displaying the visual indication relating to a status of the item of merchandise; and
wherein a visual indicator of the display selectively displays or obscures underlying printed material under the display.
9. The method of claim 8 , wherein the status of the item of merchandise includes discount and pricing information.
10. The method of claim 8 , including a further step of adding a color filter over the visual indication.
11. The method of claim 8 , wherein the visual indication is representative of a source for the item of merchandise.
12. The method of claim 8 , wherein the step of displaying the visual indication involves mixing chemically reactive materials to change color of at least part of the visual indication.
13. A method of using a radio frequency identification (RFID) device for merchandise validation, comprising the steps of:
providing an RFID device, the RFID device including a chip, an antenna operatively connected to the chip and a display operatively connected to the chip;
placing the RFID device on a carrier label or tag having printed matter so that the printed matter is under the RFID device display;
connecting the RFID device to an item of merchandise;
wherein the display includes a visual indicator that provides a visual indication of an operative state of the RFID device;
sending at least a first signal to the RFID device to display the visual indication of a first operative state of the RFID device; and
the visual indicator selectively displaying or obscuring the underlying printed matter of the carrier label or tag under the display.
14. A method as recited in claim 13 , wherein the first operative state of the RFID device is displayed as disabled.
15. A method as recited in claim 13 , including a further step of transmitting a second signal to the RFID device after the step of sending at least a first signal to the RFID device to display a second operative state.
16. A method as recited in claim 13 , wherein the printed matter of the carrier label or tag under the display includes at least one or more machine readable symbols; and wherein at least one of the machine readable symbols of the printed matter of the carrier label or tag under the display are unreadable when the visual indication is displayed.
17. A method as recited in claim 13 , wherein the RFID device is operatively connected to an energy storage device that provides power for actuating the display.
18. A method as recited in claim 13 , wherein information displayed with the visual indication includes at least one element selected from the group consisting of letters, numbers, signs, symbols and machine readable symbols.
19. A method as recited in claim 13 , wherein the visual indication is used to authenticate the item of merchandise.