Magnetic display apparatus

Details Magnetic display apparatus Magnetic display apparatus

1995-03-02

1997-05-06

Weldon, Ulysses

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345169, 40449, 235493, 281DIG1, G09G 300

Patent

active

056275625

ABSTRACT:
Apparatus for magnetically erasing and writing data stored in human readable displays of product label. The product label includes a display area with magnetic particles which can be oriented by external magnetic field in shapes including human readable figures and symbols. The so oriented magnetic particles retain their position when the external field ie removed, thereby storing the recorded information in the form of the figures and symbols. A portable apparatus includes electrically controllable write magnets for writing the figures and symbols, and an electrically controllable erase magnet for erasing previously recorded figures and symbols. The controllable magnets are mounted in a write/erase head which is self-adapting to the surface of the label.

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patent: 5290066 (1994-03-01), Mody
patent: 5359183 (1994-10-01), Skodlar

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