Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2004-12-20
2008-12-09
Sugarman, Scott J (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C345S107000, C349S033000
Reexamination Certificate
active
07463409
ABSTRACT:
An electrophoretic-type display device including an array of microcells, where each microcell is formed by a microwell containing a quantity of ink and a polymer-based membrane connected to upper edges of the microwell. The membrane is formed by curing an aqueous or hydroalcoholic sealing solution that is overcoated on the ink-filled microwells. The ink includes an isoparaffinic-based or oil-based suspension fluid, and the peripheral side walls of the microwell have a surface energy in the range of 20 to 30 mN/m. The microwell material serves two purposes: to prevent displacement (floating) of the relatively light ink solution above the relatively heavy sealing solution, and to facilitate reliable attachment between the polymer membrane and microwell walls during subsequent curing.
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Daniel Jurgen
Krusor Brent S.
Bever Patrick T.
Bever Hoffman & Harms LLP
Palo Alto Research Center Incorporated
Pinkney Dawayne A
Sugarman Scott J
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