Adhesive and sealing layers for electrophoretic displays
AssigneeSiPix Imaging, Inc.
InventorsXiaojia Wang, Cheri Pereira, Jack Hou, Rong-Chang Liang
Life of this patent
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Abstract
The invention is directed to compositions and methods for improving the physicomechanical and electro-optical properties of an electrophoretic or liquid crystal display and also to semi-finished or finished display panels with improved physicomechanical properties.
Claims23
An electrophoretic display comprising display cells, wherein said display cells are sandwiched between two electrode layers, filled with a display fluid comprising charged pigment particles dispersed in a dielectric solvent and top-sealed with a top-sealing layer formed from a sealing composition comprising a functionalized polyurethane and a radiation curable composition and said top-sealing layer has a thickness of about 1 micron to about 8 microns, and said functionalized polyurethane has a dielectric constant in a range of about 3 to 15 measured at 18° C. to 27° C. and at 60 Hz, which is higher than that of the dielectric solvent, and has a functional group selected from a group consisting of —OH, —SH, —NCO, —NCS, —NHR, —NRCONHR, —NRCSNHR, and epoxide, wherein R is hydrogen, alkyl, aryl, alkylaryl or arylalkyl of up to 20 carbon atoms.
A display or device which comprises:
- (a) a first electrode layer, (b) a second electrode layer, (c) an array of display cells sandwiched between the first electrode layer and the second electrode layer, wherein said display cells are filled with a display fluid and top-sealed with a top-sealing layer having a thickness of about 1 micron to about 8 microns, and formed from a sealing composition comprising a functionalized polyurethane and a radiation curable composition, said functionalized polyurethane has a dielectric constant in a range of about 3 to 15 measured at 18° C. to 27° C. and at 60 Hz, which is higher than that of the display fluid, and has a functional group selected from a group consisting of —OH, —SH, —NCO, —NCS, —NHR, —NRCONHR, —NRCSNHR, and epoxide, wherein R is hydrogen, alkyl, aryl, alkylaryl or arylalkyl of up to 20 carbon atoms.
Dependencies are inferred from the claim text.