Color electrophoretic displays
First Claim
Patent Images
1. An electrophoretic display comprising:
- at least one capsule containing a suspending fluid and at least one particle;
a cyan-colored electrode disposed adjacent said capsule;
a magenta-colored electrode disposed adjacent said capsule, said magenta-colored electrode spaced apart from said cyan-colored electrode;
a yellow-colored electrode disposed adjacent said capsule, said yellow-colored electrode spaced apart from said cyan-colored electrode and said magenta-colored electrode; and
a white electrode adjacent said capsule, said white electrode spaced apart from said cyan-colored electrode, said yellow-colored electrode, and said magenta-colored electrode;
wherein application of a voltage potential to said cyan-colored electrode, magenta-colored electrode, and yellow-colored electrode causes said white particles to migrate within the capsule to locations adjacent said cyan-colored electrode, said magenta-colored electrode, and said yellow-colored electrode causing said capsule to appear white, and wherein application of a second voltage potential to said cyan-colored, said magenta-colored, and said yellow-colored electrode causes said white particles to migrate within said capsule to a location adjacent said white electrode causing said capsule to appear substantially black.
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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.
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Citations
20 Claims
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1. An electrophoretic display comprising:
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at least one capsule containing a suspending fluid and at least one particle; a cyan-colored electrode disposed adjacent said capsule; a magenta-colored electrode disposed adjacent said capsule, said magenta-colored electrode spaced apart from said cyan-colored electrode; a yellow-colored electrode disposed adjacent said capsule, said yellow-colored electrode spaced apart from said cyan-colored electrode and said magenta-colored electrode; and a white electrode adjacent said capsule, said white electrode spaced apart from said cyan-colored electrode, said yellow-colored electrode, and said magenta-colored electrode; wherein application of a voltage potential to said cyan-colored electrode, magenta-colored electrode, and yellow-colored electrode causes said white particles to migrate within the capsule to locations adjacent said cyan-colored electrode, said magenta-colored electrode, and said yellow-colored electrode causing said capsule to appear white, and wherein application of a second voltage potential to said cyan-colored, said magenta-colored, and said yellow-colored electrode causes said white particles to migrate within said capsule to a location adjacent said white electrode causing said capsule to appear substantially black.
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2. An electrophoretic display comprising:
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a capsule comprising a suspending fluid and at least one particle in the suspending fluid, the particle having a first color, the capsule having a first surface through which a viewer can view the display, and a second surface on the opposed side of the capsule from the first surface; a first electrode disposed adjacent the second surface of the capsule and having a second color; and a second electrode disposed adjacent the second surface of the capsule and having a third color different from the second color, wherein application of voltage potentials to the first and second electrodes can shift the capsule between a first visual state, in which the particles lie adjacent the first electrode but not adjacent the second electrode, and a second visual state, in which the particles do not lie adjacent the first electrode but do lie adjacent the second electrode, the first and second visual states being visibly different to the viewer viewing the display through the first surface of the capsule. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electrophoretic display comprising:
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a capsule comprising a suspending fluid and a plurality of particles in the suspending fluid, the particles having a first color, the capsule having a first surface through which a viewer can view the display, and a second surface on the opposed side of the capsule from the first surface; and first and second electrodes, both the first and second electrodes being disposed adjacent one of the first and second surfaces of the capsule, wherein application of voltage potentials to the first and second electrodes can shift the capsule between a first visual state, in which the particles lie adjacent the first electrode but not adjacent the second electrode, and a second visual state, in which the particles are dispersed throughout the suspending fluid, the first and second visual states being visibly different to the viewer viewing the display through the first surface of the capsule. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification