Systems, devices, and methods for driving an analog interferometric modulator
First Claim
Patent Images
1. An apparatus for driving a display element, the display element including a movable conductive layer and one or more fixed conductive layers, the apparatus comprising:
- a circuit configured to determine an initial position of the movable conductive layer with respect to at least one of the one or more fixed conductive layers, the circuit comprising at least one transistor, the at least one transistor having its gate coupled to the moveable layer; and
a controller configured to;
determine a charging voltage based at least in part on the initial position; and
apply the charging voltage to the movable conductive layer.
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Abstract
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for accurately positioning a movable conductive layer of a reflective display element. In one aspect, an initial position of the movable conductive layer with respect to at least one or more fixed conductive layers is sensed. A charging voltage may be determined based at least in part on the initial position. The charging voltage may be applied to the movable conductive layer.
24 Citations
29 Claims
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1. An apparatus for driving a display element, the display element including a movable conductive layer and one or more fixed conductive layers, the apparatus comprising:
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a circuit configured to determine an initial position of the movable conductive layer with respect to at least one of the one or more fixed conductive layers, the circuit comprising at least one transistor, the at least one transistor having its gate coupled to the moveable layer; and a controller configured to; determine a charging voltage based at least in part on the initial position; and apply the charging voltage to the movable conductive layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of positioning a movable conductive layer that is movable with respect to one or more fixed conductive layers in a display, the method comprising:
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applying a voltage to the one or more fixed conductive layers in the display; placing the movable conductive layer at an initial position, the initial position corresponding to a first position of the movable conductive layer; sensing a voltage on the movable conductive layer at the initial position; determining the initial position of the movable conductive layer with respect to at least one of the one or more fixed conductive layers based at least in part on the sensed voltage; determining a final position of the movable conductive layer with respect to at least one of the one or more fixed conductive layers, the final position corresponding to an immediately subsequent second position at which the movable conductive layer is to be placed after application of the charging voltage; determining the charging voltage based on the initial position and the final position; and applying the charging voltage to the movable conductive layer at the initial position. - View Dependent Claims (22, 23)
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24. An apparatus for driving a display including a movable conductive layer and one or more fixed conductive layers, the apparatus comprising;
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means for applying a voltage to the one or more fixed conductive layers in the display; means for placing the movable conductive layer at an initial position, the initial position corresponding to a first position of the movable conductive layer; means for sensing a voltage on the movable conductive layer at the initial position; means for determining the initial position of the movable conductive layer with respect to at least one of the one or more fixed conductive layers based at least in part on the sensed voltage; means for determining a final position of the movable conductive layer with respect to at least one of the one or more fixed conductive layers, the final position corresponding to an immediately subsequent second position at which the moveable conductive layer is to be placed after application of the charging voltage; and means for determining the charging voltage based on the initial position and the final position, the means for applying further configured to apply the charging voltage to the movable conductive layer at the initial position. - View Dependent Claims (25, 26, 27)
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28. A computer program product for positioning a movable conductive layer that is movable with respect to one or more fixed conductive layers in a display, the computer program product comprising:
a non-transitory computer-readable medium having stored thereon code for causing processing circuitry to; apply a voltage to the one or more fixed conductive layers in the display; place the movable conductive layer at an initial position, the initial position corresponding to a first position of the movable conductive layer; sense a voltage on the movable conductive layer at the initial position; determine the initial position of the movable conductive layer with respect to at least one of the one or more fixed conductive layers based at least in part on the sensed voltage; determine a target final position of the movable conductive layer with respect to at least one of the one or more fixed conductive layers, the target final position corresponding to an immediately subsequent second position at which the movable conductive layer is to be placed after application of the charging voltage; determine the charging voltage based on the initial position and the target final position; and apply the charging voltage to the movable conductive layer at the initial position. - View Dependent Claims (29)
Specification