Browse Prior Art Database

ELECTROPHORETIC DISPLAY-MEMORY DEVICE WITH OPTICAL READ OUT

IP.com Disclosure Number: IPCOM000023964D
Original Publication Date: 1979-Jun-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 284K

Publishing Venue

Xerox Disclosure Journal

Abstract

An electrophoretic display-memory device will have added value when the system is extended to include optical read out of the displayed information. In Figure 1 there is shown a full frame imaging system wherein the electrophoretic display 1 is imaged onto an area photodetector 2 through a suitable optical element

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XEROX DISCLOSURE JOURNAL

ELECTROPHORETIC DISPLAY~-MEMORY DEVICE WITH OPTICAL READ OUT mecer

Proposed Classification U,Se CL 204/299
Into CL BOld 13/02

FIG. /

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/0 FIG, 2

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Volume 4 Number 3 May/3une 1979 313

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ELECTROPHORETIC DISPLAY-MEMORY DEVICE WITH OPTICAL READ OUT

An electrophoretic display-memory device will have added value when the system is extended to include optical read out of the displayed information.

In Figure 1 there is shown a full frame imaging system wherein the electrophoretic display 1 is imaged onto an area photodetector 2 through a suitable optical element

3 capable of resolving all of the elements in the display-memory device. The area photodetector can be a vidicon-like device having an electron beam to sense the light values received, or it may be a two-dimensional array of solid state sensing

elements, such as photodiodes, phototransistors, or charge-coupled devices.

In Figure 2 there is shown a scanned row imaging system wherein the electrophoretic display 10 is imaged in a line-by-line manner as, for example, by

means of an optical system including a movable, cylindrical lens 11. All the elements along the selected row of electrophoretic memory are read out simultaneously by means of a linear array of photocells 12, an array of charge- coupled devices or a linear strip vidicon.

Greater read out accuracy or sensitivity is achievable in either the embodiment of Figur...