Current mode display driver circuit realization feature
First Claim
1. A method of driving an interferometric modulator pixel with a substantially constant current source to produce different optical responses, the method comprising:
- configuring a drive circuit in a first state so that a plurality of charge storing devices are charged by a voltage source and the plurality of charge storing devices do not provide a voltage across the interferometric modulator pixel; and
changing the configuration of the driving circuit to a second state in a series of incremental steps over a predetermined time, wherein each of the incremental steps comprises connecting one of the plurality of charge storing devices to the pixel such that the one charge storing device provides a voltage across the pixel.
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Accused Products
Abstract
The invention comprises devices and methods for driving a MEMS pixel, for example an interferometric modulator pixel. In one embodiment a device for modulating light includes a light modulator including a movable optical element positionable in two or more positions, the modulator operating interferometrically to exhibit a different predetermined optical response in each of the two or more positions, and control circuitry to provide a potential difference across the modulator, where the control circuitry is configured to incrementally increase the potential difference provided by a predetermined amount over a period of time, and where the optical element of the light modulator is moveable at least partially in response to the provided potential difference.
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Citations
20 Claims
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1. A method of driving an interferometric modulator pixel with a substantially constant current source to produce different optical responses, the method comprising:
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configuring a drive circuit in a first state so that a plurality of charge storing devices are charged by a voltage source and the plurality of charge storing devices do not provide a voltage across the interferometric modulator pixel; and changing the configuration of the driving circuit to a second state in a series of incremental steps over a predetermined time, wherein each of the incremental steps comprises connecting one of the plurality of charge storing devices to the pixel such that the one charge storing device provides a voltage across the pixel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 19, 20)
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9. A device for modulating light, comprising:
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at least one light modulator comprising a movable optical element and operating interferometrically to exhibit a different optical response in each of two or more positions; and control circuitry configured to provide a potential difference across the light modulator, the control circuitry being configured to incrementally increase the potential difference provided by a predetermined amount over a period of time utilizing a plurality of charge storing devices, wherein the optical element is configured to be movable at least partially in response to the provided potential difference. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification