Method and device for modulating light
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Accused Products
Abstract
Light in the visible spectrum is modulated using an array of modulation elements, and control circuitry connected to the array for controlling each of the modulation elements independently, each of the modulation elements having a surface which is caused to exhibit a predetermined impedance characteristic to particular frequencies of light. The amplitude of light delivered by each of the modulation elements is controlled independently by pulse code modulation. Each modulation element has a deformable portion held under tensile stress, and the control circuitry controls the deformation of the deformable portion. Each deformable element has a deformation mechanism and an optical portion, the deformation mechanism and the optical portion independently imparting to the element respectively a controlled deformation characteristic and a controlled modulation characteristic. The deformable modulation element may be a non-metal. The elements are made by forming a sandwich of two layers and a sacrificial layer between them, the sacrificial layer having a thickness related to the final cavity dimension, and using water or an oxygen based plasma to remove the sacrificial layer.
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Citations
72 Claims
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1-53. -53. (canceled)
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54. A device for modulating light comprising:
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a light modulating element comprising a light modulating cavity, and a charging element configured to shift a packet of charge to the light modulating element, wherein the modulating element is configured to modulate light in response to, at least in part, the shifted charge. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63)
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64. A device for modulating light comprising:
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a light modulating element comprising a first wall and a second wall defining a cavity, wherein at least one of the walls is movable relative to the other; and
a charging element configured to shift a packet of charge to the light modulating element, wherein the shifted charge controls that relative movement of the walls. - View Dependent Claims (65)
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66. A light modulating device for displaying at least a portion of an image, the device comprising:
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a light modulating element comprising a first surface and a second surface defining a cavity there between, wherein light is modulated in response to optical interference within said cavity, and wherein said optical interference is dependent, at least in part, on a distance between the first and second surfaces; and
a charge coupled device configured to shift packets of charge to the light modulating element, wherein said distance is altered in response to said shift of charge. - View Dependent Claims (67)
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68. A method of modulating light in a modulator array comprising:
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shifting packets of charge from a charging element to at least one modulating element of the modulator array, the modulating element comprising a cavity; and
causing optical interference within said cavity of said at least one modulating element in response to said shifting of packets of charge.
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69. A light modulating device, the device comprising:
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a row of light modulating pixels comprising selectively light reflective and light absorbing structures defining a cavity, and a pixel scanner comprising a charge coupled device configured to shift charge along the row of light modulation elements. - View Dependent Claims (70, 71, 72)
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Specification