METHOD AND APPARATUS FOR SENSING, MEASUREMENT OR CHARACTERIZATION OF DISPLAY ELEMENTS INTEGRATED WITH THE DISPLAY DRIVE SCHEME, AND SYSTEM AND APPLICATIONS USING THE SAME
First Claim
1. A method of operating a device, comprising:
- applying a drive signal across a first and second electrodes of the device, wherein the drive signal alters a state of the device from a first state to a second state and back to the first state, wherein the transition from the first state to the second state and back to the first state has a duration which causes the transition to be substantially undetectable to a viewer; and
determining at least one operational characteristic of the device based on an electrical response of the device to the applied drive signal.
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Accused Products
Abstract
Methods and systems for electrical sensing, measurement and characterization of display elements are described. An embodiment includes integrating the electrical sensing, measurement and characterization with the display drive scheme. This embodiment allows for measurement of DC or operational hysteresis voltages and/or response times of interferometric modulator MEMS devices, for example, to be fully integrated with the display driver IC and/or the display drive scheme. Another embodiment allows these measurements to be performed and used without resulting in display artifacts visible to a human user. Another embodiment allows the measurement circuitry to be integrated with the display driver IC and/or the display drive scheme re-using several existing circuitry components and features, thus allowing for integration of the measurement method and its use relatively easily.
35 Citations
35 Claims
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1. A method of operating a device, comprising:
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applying a drive signal across a first and second electrodes of the device, wherein the drive signal alters a state of the device from a first state to a second state and back to the first state, wherein the transition from the first state to the second state and back to the first state has a duration which causes the transition to be substantially undetectable to a viewer; and determining at least one operational characteristic of the device based on an electrical response of the device to the applied drive signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A characterization apparatus, comprising:
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drive circuitry configured to apply a drive signal across first and second electrodes of a device, wherein the drive signal alters a state of the device from a first state to a second state and back to the first state, wherein the transition from the first state to the second state and back to the first state has a duration which causes the transition to be substantially undetectable to a viewer; and a processor configured to receive a response signal indicative of an electrical response of the device to the applied drive signal, and to determine at least one operational characteristic of the device based on the response signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A characterization device, comprising:
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means for applying a drive signal across first and second electrodes of a device, wherein the drive signal alters a state of the device from a first state to a second state and back to the first state, wherein the transition from the first state to the second state and back to the first state has a duration which causes the transition to be substantially undetectable to a viewer; and means for receiving a response signal indicative of an electrical response of the device to the applied drive signal, and to determine at least one operational characteristic of the device based on the response signal. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A characterization device comprising:
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an array of interferometric modulators; drive circuitry configured to apply a drive signal across first and second electrodes of a device, wherein the drive signal alters a state of the device from a first state to a second state and back to the first state, wherein the transition from the first state to the second state and back to the first state has a duration which causes the transition to be substantially undetectable to a viewer; a processor configured to receive a response signal indicative of an electrical response of the device to the applied drive signal, and to determine at least one operational characteristic of the device based on the response signal; and a memory device configured to communicate with the processor. - View Dependent Claims (32, 33, 34, 35)
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Specification