Damped control of a micromechanical device
First Claim
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1. A method of operating a digital micromirror device having at least one micromirror, the method comprising:
- applying a reset voltage pulse to the micromirror;
applying an offset voltage to the micromirror immediately after the reset voltage pulse;
applying a bias voltage to the micromirror immediately after the offset voltage, wherein the bias voltage is applied for a damping delay period;
applying a triangular damping pulse to the micromirror after the damping delay period, whereby the triangular damping pulse reduces a transient resonant vibration of the micromirror on a first landing plate; and
reapplying the bias voltage to the micromirror.
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Abstract
Device and method for a damping function to reduce undesirable mechanical transient responses to control signals. In one aspect of the present invention, the damping function may be used to reduce overshoot and oscillation when a digital micromirror is driven from a landing plate to the flat or neutral position. In another aspect of the present invention, the damping function may be used to reduce transient resonance of a digital micromirror when the micromirror is driven to a landing plate.
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14 Claims
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1. A method of operating a digital micromirror device having at least one micromirror, the method comprising:
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applying a reset voltage pulse to the micromirror;
applying an offset voltage to the micromirror immediately after the reset voltage pulse;
applying a bias voltage to the micromirror immediately after the offset voltage, wherein the bias voltage is applied for a damping delay period;
applying a triangular damping pulse to the micromirror after the damping delay period, whereby the triangular damping pulse reduces a transient resonant vibration of the micromirror on a first landing plate; and
reapplying the bias voltage to the micromirror. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a digital micromirror device having at least one micromirror, the method comprising:
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applying a reset voltage pulse to the micromirror, wherein the reset voltage pulse causes the micromirror to launch from a landing plate;
applying an offset voltage to the micromirror immediately after the reset voltage pulse, wherein the offset voltage is applied for a damping delay period, wherein the micromirror launches and is moving away from the landing plate before an expiration of the damping delay period;
applying a triangular damping pulse to the micromirror immediately after the offset voltage; and
reapplying the offset voltage to the micromirror, whereby the triangular damping pulse reduces oscillation of the micromirror about a neutral position. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification