Liquid filled electro-optic display cell with diaphragm seal
First Claim
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1. A liquid filled electro-optic display cell having:
- an enclosure for the liquid;
a filling orifice in one of the walls of the enclosure, said orifice being surrounded by a rim which is raised;
an impervious elastomer diaphragm in contact with said rim so as to seal the orifice;
and a retaining means for retaining said diaphragm in contact with said rim while allowing it freedom to flex over a central portion of said orifice thereby to accommodate differential thermal expansion of the liquid and enclosure.
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Abstract
A liquid-filled electro-optic display cell employs an elastomeric diaphragm to seal a filling orifice in the cell side wall. The orifice is surrounded by a rim and the diaphragm is retained over the rim in such a way as to seal the orifice while remaining free to flex over central portions of the orifice. This retention may be effected by means of an annular washer and clamping pin. In this way, sealing is effected and thermal expansion accommodated. The cell is filled by turning it until the orifice is uppermost and filling it until a convex meniscus is formed above the rim to ensure that the diaphragm seals the orifice without introduction of bubbles.
32 Citations
8 Claims
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1. A liquid filled electro-optic display cell having:
- an enclosure for the liquid;
a filling orifice in one of the walls of the enclosure, said orifice being surrounded by a rim which is raised;
an impervious elastomer diaphragm in contact with said rim so as to seal the orifice;and a retaining means for retaining said diaphragm in contact with said rim while allowing it freedom to flex over a central portion of said orifice thereby to accommodate differential thermal expansion of the liquid and enclosure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- an enclosure for the liquid;
Specification