ELECTROSTATICALLY ADDRESSABLE ELECTROPHORETIC DISPLAY
First Claim
1. A method for addressing an electrophoretic display which includes at least one cavity containing charged particles, the method comprising the steps of:
- (a) providing three or more electrodes adjacent each cavity; and
(b) applying a sequence of potentials to said three or more electrodes to control the movement of said charged particles inside said cavity,wherein at least two of said three or more electrodes are disposed in the same plane, and the sequence of potentials causes the charged particles to move between said at least two electrodes in the same plane.
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Abstract
Novel addressing schemes for controlling electronically addressable displays include a scheme for rear-addressing displays, which allows for in-plane switching of the display material. Other schemes include a rear-addressing scheme which uses a retroreflecting surface to enable greater viewing angle and contrast. Another scheme includes an electrode structure that facilitates manufacture and control of a color display. Another electrode structure facilitates addressing a display using an electrostatic stylus. Methods of using the disclosed electrode structures are also disclosed. Another scheme includes devices combining display materials with silicon transistor addressing structures.
125 Citations
16 Claims
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1. A method for addressing an electrophoretic display which includes at least one cavity containing charged particles, the method comprising the steps of:
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(a) providing three or more electrodes adjacent each cavity; and (b) applying a sequence of potentials to said three or more electrodes to control the movement of said charged particles inside said cavity, wherein at least two of said three or more electrodes are disposed in the same plane, and the sequence of potentials causes the charged particles to move between said at least two electrodes in the same plane. - View Dependent Claims (2, 3, 4, 5, 6, 14)
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7. A method for addressing an electrophoretic display which includes at least one capsule containing charged particles, the method comprising the steps of:
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(a) providing three or more electrodes adjacent each capsule; and (b) applying a sequence of potentials to said three or more electrodes to control the movement of said charged particles inside each capsule, such that the particles are prevented from traversing said capsule until at least one electrode of said three or more electrodes is at a potential high enough to overcome the effects of at least one other electrode of said three or more electrodes. - View Dependent Claims (8)
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9. An electrophoretic display comprising:
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walls defining a cavity containing charged particles; and three or more electrodes disposed adjacent said capsule, wherein a sequence of voltage potentials applied to said three or more electrodes causes said charged particles to move within said capsule responsive to said sequence of voltage potentials, at least two of said three or more electrodes being disposed in the same plane such that the sequence of potentials causes the charged particles to move between said at least two electrodes in the same plane. - View Dependent Claims (10, 11, 12, 13)
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15. An electrophoretic display comprising:
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at least one capsule containing charged particles; and three or more electrodes adjacent each capsule; and wherein a sequence of voltage potentials applied to said three or more electrodes controls the movement of said charged particles inside each capsule, such that the particles are prevented from traversing said capsule until at least one electrode of said three or more electrodes is at a potential high enough to overcome the effects of at least one other electrode of said three or more electrodes. - View Dependent Claims (16)
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Specification