Row and column actuator control
In one embodiment, a device is provided that includes: a plurality of actuators arranged into a plurality of rows and a plurality of columns; a plurality of row conductors corresponding to the plurality of rows; a plurality of column conductors corresponding to the plurality of columns; and a controller configured to select at least one of the actuators in a row by raising a voltage on the corresponding row conductor to couple each selected actuator to its corresponding column conductor.
1. A device comprising:
a plurality of actuators arranged into a plurality of rows and a plurality of columns;
a plurality of row conductors corresponding to the plurality of rows;
a plurality of column conductors corresponding to the plurality of columns; and
a controller configured to select at least one of the actuators in a row by raising a voltage on the corresponding row conductor to couple each selected actuator to its corresponding column conductor,
wherein each actuator is a parallel-plate actuator comprising an isolated plate surrounded by a gap separating the isolated plate from a surrounding substrate, and
wherein a corresponding surrounding substrate of the selected actuator is deformed when the selected actuator is actuated.
2. The device of claim 1 , wherein each isolated plate comprises polysilicon.
3. The device of claim 1 , wherein actuators in a column are actuated simultaneously to provide an aggregated travel distance or force in the column.
4. A method, comprising:
selecting at least one electrostatic actuator for actuation from a plurality of electrostatic actuators, the electrostatic actuators being arranged in rows and columns corresponding to a plurality of row and column conductors, and
driving the selected actuator by raising the voltage on the corresponding row conductor to couple the selected actuator to the corresponding column conductor,
wherein each electrostatic actuator is a parallel-plate actuator comprising an isolated plate surrounded by a gap separating the isolated plate from a surrounding substrate, and
wherein a corresponding surrounding substrate of the selected actuator is deformed when the selected actuator is actuated.
5. The method of claim 4 , wherein the raising the voltage on the corresponding row conductor causes a transistor to conduct that couples the selected actuator to the corresponding column conductor.
6. The method of claim 5 , further comprising driving the corresponding column conductor with a first voltage to drive the selected actuator to contract.
7. The method of claim 6 , further comprising driving the corresponding column conductor with a second voltage to drive the selected actuator to expand.
8. The method of claim 7 , wherein the first voltage is higher than the second voltage.
9. The method of claim 4 , wherein the at least one actuator comprises a row of actuators.
10. The method of claim 4 , wherein a plurality of electrostatic actuators in a column are actuated simultaneously to provide an aggregated travel distance or force in the column.