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Process for creating an encapsulated electrophoretic display

Patent 6067185 Issued on May 23, 2000. Estimated Expiration Date: Icon_subject August 27, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

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Inventors

Assignee

Application

No. 141105 filed on 08/27/1998

US Classes:

359/296, Changing position or orientation of suspended particles204/478, With irradiation or illumination (e.g., for curing, etc.)204/606, Gel electrophoresis type252/583, Modification caused by energy other than light264/8, Utilizing centrifugal force or rotating forming zone345/107, Particle suspensions (e.g., electrophoretic)430/34, Pretreatment process to change the physical properties of electrophoretic suspension or specified imaging feature exposure430/35Specified electric field applied or electric charging step

Examiners

Primary: Ben, Loha

Attorney, Agent or Firm

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International Class

G02B 026/00

Abstract

Disclosed herein are novel electrophoretic displays and materials useful in fabricating such displays. In particular, novel encapsulated displays are disclosed. Particles encapsulated therein are dispersed within a suspending, or electrophoretic, fluid. This fluid may be a mixture of two or more fluids or may be a single fluid. The displays may further comprise particles dispersed in a suspending fluid, wherein the particles contain a liquid. In either case, the suspending fluid may have a density or refractive index substantially matched to that of the particles dispersed therein. Finally, also disclosed herein are electro-osmotic displays. These displays comprise at least one capsule containing either a cellulosic or gel-like internal phase and a liquid phase, or containing two or more immiscible fluids. Application of electric fields to any of the electrophoretic displays described herein affects an optical property of the display.

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