Method and device for multistate interferometric light modulation
First Claim
Patent Images
1. A display device, comprising:
- a first display element configured to be selectively switched among at least a first state having a first spectral reflectance being a first color, a second state having a second spectral reflectance being a second color different than the first color, and a third state having a third spectral reflectance being a black state,the first display element including a deformable movable component capable of moving from a relaxed position to a first actuated position above the relaxed position and to a second actuated position below the relaxed position, the deformable movable component including a partially reflective material, andthe first display element further including a first actuation electrode positioned above the movable component and a second actuation electrode positioned below the movable component, in the relaxed position the deformable movable component being substantially planar and parallel to the second actuation electrode.
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Abstract
A multi-state light modulator comprises a first reflector. A first electrode is positioned at a distance from the first reflector. A second reflector is positioned between the first reflector and the first electrode. The second reflector is movable between an undriven position, a first driven position, and a second driven position, each having a corresponding distance from the first reflector. In one embodiment, the three positions correspond to reflecting white light, being non-reflective, and reflecting a selected color of light. Another embodiment is a method of making the light modulator. Another embodiment is a display including the light modulator.
758 Citations
27 Claims
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1. A display device, comprising:
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a first display element configured to be selectively switched among at least a first state having a first spectral reflectance being a first color, a second state having a second spectral reflectance being a second color different than the first color, and a third state having a third spectral reflectance being a black state, the first display element including a deformable movable component capable of moving from a relaxed position to a first actuated position above the relaxed position and to a second actuated position below the relaxed position, the deformable movable component including a partially reflective material, and the first display element further including a first actuation electrode positioned above the movable component and a second actuation electrode positioned below the movable component, in the relaxed position the deformable movable component being substantially planar and parallel to the second actuation electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A display device comprising:
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first means for reflecting a first color, reflecting a second color different than the first color, and reflecting substantially no wavelengths of visible light, which appears as a substantially black color, the first means comprising a deformable movable component capable of moving from a relaxed position to a first actuated position below the relaxed position and to a second actuated position above the relaxed position, the deformable moveable component in the relaxed position being substantially planar; and second means for reflecting a third color different than the first color and the second color, reflecting a fourth color different than the first color, the second color, and the third color, and reflecting substantially no wavelengths of visible light, which appears as a substantially black color. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A method of generating an image, the method comprising:
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selectively switching a first display element between at least a first state having a first spectral reflectance being a first color, a second state having a second spectral reflectance being a second color different than the first color, and a third state having a third spectral reflectance being a black state, wherein the first display element includes a first deformable movable component including a partially reflective material, a first actuation electrode positioned above the first deformable movable component, and a second actuation electrode positioned below the first deformable movable component, wherein the first deformable movable component is capable of moving from a relaxed position to a first actuated position above the relaxed position and to a second actuated position below the relaxed position, in the relaxed position the deformable movable component being substantially planar and parallel to the second actuation electrode; and selectively switching a second display element between at least a first state having a fourth spectral reflectance being a third color different than the first color and the second color, a second state having a fifth spectral reflectance being a fourth color different than the first color, the second color, and the third color, and a third state having a sixth spectral reflectance being a black state, wherein the second display element includes a second deformable movable component including a partially reflective material, a third actuation electrode positioned above the second movable component, and a fourth actuation electrode positioned below the second movable component, wherein the second movable component is capable of moving from a relaxed position to a first actuated position above the relaxed position and to a second actuated position below the relaxed position. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification