Poled electrets for gyricon-based electric-paper displays
First Claim
1. A method of forming an electric paper display comprising the steps of:
- forming monochromal balls from a polarizable material;
encapsulating each of the monochromal balls in a shell;
polarizing the monochromal balls by applying a first electric field thereto such that each ball forms a positive hemisphere and a negative hemisphere;
applying at least one colorant to each of the monochromal balls to obtain multichromal balls such that the positive hemispheres of each ball carry a colorant distinct from the negative hemispheres; and
fabricating an electric paper display by encapsulating the multichromal balls in an array such that each multichromal ball is capable of rotating to display a colorant in response to a second electric field selectively applied thereto.
4 Assignments
0 Petitions
Accused Products
Abstract
Twisting balls (10) for an electric-paper display are formed from a polarizable material and encapsulated in a protective shell (12). The balls (10) are disposed between first and second electrodes (14, 16) which generate an electric field. The electric field polarizes each ball (10) transforming each into a dipole electret having a first and second charged poles. At least one colorant (20) is applied to each of the balls (10) to obtain multichromal balls such that the charged poles are distinct from each other. The polarized multichromal balls may then be used in fabricating an electric-paper display by encapsulating the balls (10) in an array such that each ball is capable of rotating in response to a selectively applied electric field.
536 Citations
18 Claims
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1. A method of forming an electric paper display comprising the steps of:
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forming monochromal balls from a polarizable material; encapsulating each of the monochromal balls in a shell; polarizing the monochromal balls by applying a first electric field thereto such that each ball forms a positive hemisphere and a negative hemisphere; applying at least one colorant to each of the monochromal balls to obtain multichromal balls such that the positive hemispheres of each ball carry a colorant distinct from the negative hemispheres; and fabricating an electric paper display by encapsulating the multichromal balls in an array such that each multichromal ball is capable of rotating to display a colorant in response to a second electric field selectively applied thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of forming multichromal balls for an electric paper display comprising the steps of:
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forming a plurality of balls from a core material; encapsulating each of the plurality of balls in a shell; transforming the core material of each of the plurality of balls into a dipole electret having a first charged pole and a second charged pole, the first charged pole being differently charged than the second charged pole; and forming multichromal balls by coloring each of the plurality of balls such that the first charged pole of each ball is distinct from the second charged pole. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of forming multichromal balls comprising the steps of:
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forming a plurality of balls from a polarizable material; coating the plurality of balls with a protective cover; polarizing the polarizable material of each of the plurality of balls forming a first charged pole and a second charged pole, the first charged pole being differently charged than the second charged pole; and forming multichromal balls by coloring each of the plurality of balls such that the first charged pole of each ball is optically distinct from the second charged pole. - View Dependent Claims (15, 16, 17, 18)
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Specification