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Liquid Crystal Display and Light Emitting Diode Displays Powered by Radiofrequency

IP.com Disclosure Number: IPCOM000118468D
Original Publication Date: 1997-Feb-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 21K

Publishing Venue

IBM

Related People

Brady, MJ: AUTHOR [+3]

Abstract

Disclosed is a display, Liquid Crystal Display (LCD) or Light Emitting Diode (LED), that is powered by a microwave or Radiofrequency (RF) field. The apparatus consists of an antenna and a display. Additionally, the apparatus may contain logic and memory circuits such as those found in RF transponder tags.

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Liquid Crystal Display and Light Emitting Diode Displays Powered
by Radiofrequency

      Disclosed is a display, Liquid Crystal Display (LCD) or Light
Emitting Diode (LED), that is powered by a microwave or
Radiofrequency (RF) field.  The apparatus consists of an antenna and
a display.  Additionally, the apparatus may contain logic and memory
circuits such as those found in RF transponder tags.

      Examples of applications include:  LCD on wrist band for
tracking patients in a hospital; inventory for items on store shelves
including visual indication of items past expiration date; transit
pass in credit card format for which LCD indicates how many fares
remain.