Interferometric modulators having charge persistence
First Claim
Patent Images
1. A display device configured to display an image based on image data, the display device comprising:
- an array of display elements; and
a driving circuit configured to embed a charge in at least one of the display elements thereby shifting an actuation threshold to one of a plurality of functional differentiable actuation thresholds,wherein the driving circuit is further configured to actuate the at least one of the display elements to embed the charge.
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Abstract
An interferometric modulator is formed having a dielectric with charge persistence. The interferometric modulator is addressed by a method making advantageous use of the charge persistence property, wherein the interferometric modulator is pre-charged in such a way that the pre-charging is not observable to a viewer, and the actuation voltage threshold of the imod is significantly lowered. Subsequently the interferometric modulator may be actuated with a significantly lower actuation voltage, thereby saving power.
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Citations
12 Claims
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1. A display device configured to display an image based on image data, the display device comprising:
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an array of display elements; and a driving circuit configured to embed a charge in at least one of the display elements thereby shifting an actuation threshold to one of a plurality of functional differentiable actuation thresholds, wherein the driving circuit is further configured to actuate the at least one of the display elements to embed the charge.
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2. A display device configured to display an image based on image data, the display device comprising:
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an array of display elements; and a driving circuit configured to embed a charge in at least one of the display elements thereby shifting an actuation threshold to one of a plurality of functional differentiable actuation thresholds, wherein the at least one of the display elements comprises; a movable reflective layer; and a dielectric layer coupled to an electrode, dielectric layer being configured to store the charge, wherein a cavity is formed between the movable reflective layer and the dielectric layer. - View Dependent Claims (3, 4, 5)
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6. A display device configured to display an image based on image data, the display device comprising:
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an array of display elements; and a driving circuit configured to embed a charge in at least one of the display elements thereby shifting an actuation threshold to one of a plurality of functional differentiable actuation thresholds., wherein the driving circuit is configured to remove the charge from the at least one of the display elements by applying an alternating current to the at least one of the display elements.
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7. A display device configured to display an image based on image data, the display device comprising:
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an array of display elements; and a driving circuit configured to embed a charge in at least one of the display elements thereby shifting an actuation threshold to one of a plurality of functional differentiable actuation thresholds, wherein the driving circuit is configured to remove the charge from the at least one of the display elements by applying an electrical pulse to the at least one of the display elements.
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8. A display device comprising:
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means for transferring a charge to a dielectric of a display element during a pre-charge period without substantially altering a perceived appearance; and means for applying a first electrical potential difference to the display element during a period sufficient to actuate the display element and alter the perceived appearance. - View Dependent Claims (9, 10, 11, 12)
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Specification