System and method of sensing actuation and release voltages of an interferometric modulator
First Claim
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1. A method of determining one or both of an actuation voltage and a release voltage of a microelectromechanical device, the method comprising:
- applying at least two different electric potentials to at least one electrode coupled to said device;
detecting at least one capacitance dependent response of said device at said at least two different electric potentials;
determining, based at least in part on said response, a state of said device at said at least two different electric potentials, and determining one or both of said actuation voltage and release voltage based at least in part on said determining.
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Abstract
A method for sensing the actuation and/or release voltages of a microelectromechanical device include applying a varying voltage to the device and sensing its state and different voltage levels. In one embodiment, the device is part of a system comprising an array of interferometric modulators suitable for a display. The method can be used to compensate for temperature dependent changes in display pixel characteristics.
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Citations
15 Claims
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1. A method of determining one or both of an actuation voltage and a release voltage of a microelectromechanical device, the method comprising:
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applying at least two different electric potentials to at least one electrode coupled to said device;
detecting at least one capacitance dependent response of said device at said at least two different electric potentials;
determining, based at least in part on said response, a state of said device at said at least two different electric potentials, and determining one or both of said actuation voltage and release voltage based at least in part on said determining. - View Dependent Claims (2, 3, 4)
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5. A display system comprising:
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an array of microelectromechanical pixels configured to present display data to a user of said display system;
at least one additional microelectromechanical pixel;
a sensor, configured to sense one or both of an actuation voltage or a release voltage of said additional microelectromechanical pixel. - View Dependent Claims (6, 7, 8, 9)
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10. A method for compensating for shifts in one or both of the release and actuation voltage display pixels, the method comprising:
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determining the actuation and or release state of at least one pixel; and
modifying driving voltage levels in response to said determining. - View Dependent Claims (11)
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- 12. A method of compensating for a temperature dependence of a display device, said method comprising determining one or both of an actuation and release voltage for at least one pixel associated with said display device and modifying device operational parameters based at least in part on said determining.
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15. A display device comprising:
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an array of microelectromechanical pixels;
at least one test microelectromechanical pixel;
means for determining one or both of an actuation voltage and release voltage of said test microelectromechanical pixel.
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Specification