Display sheet with a plurality of hourglass shaped capsules cont

Details Display sheet with a plurality of hourglass shaped capsules cont Display sheet with a plurality of hourglass shaped capsules cont

1996-01-03

1998-02-10

O'Shea, Sandra L.

Electric lamp and discharge devices

With luminescent solid or liquid material

313493, 313634, H01J 6304

Patent

active

057172838

ABSTRACT:
An external field activated display sheet is disclosed which comprises a plurality of hourglass shaped capsules for each pixel of an image. Each hourglass shaped capsule contains ink in one of its chambers. The ink in each hourglass shaped capsule is responsive to an external field being applied across the capsule for the movement from one chamber to the other. An opaque medial sheet blocks the visibility of the ink in the chambers under the medial sheet. Applying an external field across an hourglass shaped capsule causes the ink to be moved into the chamber above the medial sheet where it is visible. By applying an external field across selective hourglass shaped cavities, an image can be displayed.

REFERENCES:
patent: 3974638 (1976-08-01), Haser
patent: 4332096 (1982-06-01), Kohner et al.

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