Drive circuit of electrostatic film actuator
AssigneeASUSTeK COMPUTER INC.
InventorLai-Shi Huang
Life of this patent
Estimating the term…
Abstract
A drive circuit is provided, which is used for driving an electrostatic film actuator. The drive circuit includes an input end, an isolation capacitor and a diode. The input end is used for receiving an input signal. The isolation capacitor includes a first end and a second end. The first end is electrically connected to the input end, and the second end is electrically connected to the electrostatic film actuator. The diode is connected between a working voltage end and the second end in a forward-bias direction, and an output signal is generated at the second end to drive the electrostatic film actuator.
Claims8
A drive circuit, which is used for driving an electrostatic film actuator, the drive circuit comprising:
- an input end, used for receiving an input signal;
- an isolation capacitor, comprising a first end and a second end, wherein the first end is electrically connected to the input end, and the second end is electrically connected to the electrostatic film actuator;
- and
- a diode, connected between a working voltage end and the second end in a forward-bias direction, wherein an output signal is generated at the second end to drive the electrostatic film actuator,
- wherein the input signal is a first pulse width modulation signal, and
- wherein the first pulse width modulation signal has a frequency range of 0.1 Hz to 192 kHz;
- the output signal is a second pulse width modulation signal;
- and the second pulse width modulation signal has a frequency range of 0.1 Hz to 96 kHz.
A drive circuit, which is used for driving an electrostatic film actuator comprising a positive electrode end and a negative electrode end, wherein the drive circuit comprises:
- a first input end, used for receiving a first input signal;
- a second input end, used for receiving a second input signal;
- a first isolation capacitor, comprising a first end and a second end, wherein the first end is electrically connected to the first input end, and the second end is electrically connected to the positive electrode end;
- a second isolation capacitor, comprising a third end and a fourth end, wherein the third end is electrically connected to the second input end, and the fourth end is electrically connected to the negative electrode end;
- a first diode, connected between a first working voltage end and the second end in a forward-bias direction, wherein a first output signal is generated at the second end to drive the electrostatic film actuator;
- and
- a second diode, connected between the fourth end and a second working voltage end in a forward-bias direction, wherein a second output signal is generated at the fourth end to drive the electrostatic film actuator;
- and
- wherein the second input signal is an inverted signal of the first input signal.
Dependencies are inferred from the claim text.