ELECTRO-OPTIC DISPLAYS
First Claim
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1. An electrophoretic medium comprising a plurality of electrically charged particles dispersed in a suspending fluid, the particles comprising at least two types of particles having substantially the same electrophoretic mobility but differing colors:
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Abstract
The invention provides an electrophoretic medium comprising at least two types of particles having substantially the same electrophoretic mobility but differing colors. The invention also provides article of manufacture comprising a layer of a solid electro-optic medium, a first adhesive layer on one surface of the electro-optic medium, a release sheet covering the first adhesive layer, and a second adhesive layer on an opposed second surface of the electro-optic medium.
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Citations
23 Claims
- 1. An electrophoretic medium comprising a plurality of electrically charged particles dispersed in a suspending fluid, the particles comprising at least two types of particles having substantially the same electrophoretic mobility but differing colors:
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6. A process for forming an electrophoretic medium, the process comprising:
- mixing at least two pigments having differing colors to form a mixed pigment;
subjecting the mixed pigment to at least one surface treatment; and
dispersing the surface-treated mixed pigment in a suspending fluid to form at least two types of particles having substantially the same electrophoretic mobility but differing colors. - View Dependent Claims (7, 8, 9, 10)
- mixing at least two pigments having differing colors to form a mixed pigment;
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11. An electro-optic display element comprising:
- an electro-optic display medium;
an optical biasing element arranged to modify an optical characteristic of the electro-optic display element; and
an addressing electrode to address the electro-optic display medium, wherein the color of the optical biasing element varies in different portions of the electro-optic display element, so that the optical biasing element forms a color filter. - View Dependent Claims (12)
- an electro-optic display medium;
- 13. An electrophoretic medium comprising a plurality of capsules, each capsule comprising a suspending fluid, a plurality of electrically charged particles suspended in the suspending fluid and capable of moving therethrough on application of an electric field to the suspending fluid, and a capsule wall surrounding the suspending fluid and the electrically charged particles, the medium further comprising a color filter array having a plurality of non-rectangular pixels.
- 15. An electro-optic display comprising a layer of a solid electro-optic medium, at least one electrode arranged adjacent the layer of electro-optic medium so as to apply an electric field thereto, and a color filter array disposed between the electro-optic medium and the electrode, the resistance of the color filter array being not substantially greater than that of the layer of electro-optic medium.
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17. A process for forming a color filter array, the process comprising:
- imaging a photosensitive film to form a color filter array pattern thereon; and
thereafter depositing a conductive layer on to the photosensitive film.
- imaging a photosensitive film to form a color filter array pattern thereon; and
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18. A process for forming an electrophoretic display, the process comprising:
- providing a color filter array;
providing an electrophoretic medium comprising a plurality of capsules, each capsule comprising a suspending fluid, a plurality of electrically charged particles suspended in the suspending fluid and capable of moving therethrough on application of an electric field to the suspending fluid, and a capsule wall surrounding the suspending fluid and the electrically charged particles;
depositing the electrophoretic medium on the color filter array to form a coated color filter array; and
thereafter laminating the coated color filter array to a backplane comprising at least one pixel electrode. - View Dependent Claims (19)
- providing a color filter array;
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20. A process for depositing an electrophoretic medium on an electrode, the process comprising:
- providing an electrode;
providing an electrophoretic medium comprising a plurality of capsules, each capsule comprising a suspending fluid, a plurality of electrically charged particles suspended in the suspending fluid and capable of moving therethrough on application of an electric field to the suspending fluid, and a capsule wall surrounding the suspending fluid and the electrically charged particles;
surface treating the electrode to produce regions of varying surface energy thereon; and
depositing the electrophoretic medium on the surface-treated electrode.
- providing an electrode;
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21. A process for forming an electrophoretic display, the process comprising:
- providing a front substrate;
providing a backplane;
providing an electrophoretic medium comprising a plurality of capsules, each capsule comprising a suspending fluid, a plurality of electrically charged particles suspended in the suspending fluid and capable of moving therethrough on application of an electric field to the suspending fluid, and a capsule wall surrounding the suspending fluid and the electrically charged particles;
surface treating a surface of the front substrate to promote wetting thereof by the capsules;
surface treating a surface of the backplane to promote dewetting thereof by the capsules;
assembling the front substrate and the backplane together with the treated surfaces thereof facing each other, and with a gap between the treated surfaces; and
introducing the electrophoretic medium into the gap, whereby the capsules of the electrophoretic medium pack against the treated surface of the front substrate.
- providing a front substrate;
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22. An article of manufacture comprising:
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a layer of a solid electro-optic medium having first and second surfaces on opposed sides thereof; a first release sheet in contact with the first surface of the layer of solid electro-optic medium; and a second release sheet in contact with the second surface of the layer of solid electro-optic medium. - View Dependent Claims (23)
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Specification