Power efficiency optimization method of LC resonant driver for MEMS mirrors

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United States of America Patent

PATENT NO 12072484
APP PUB NO 20220404611A1
SERIAL NO

17353724

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Techniques are described herein for dynamically adjusting a resonant frequency of a resonance circuit to optimize power transfer to a mirror device such as a MEMS mirror. A variable capacitance circuit can be operated responsive to a bias control signal. A capacitance control circuit can vary the bias control signal to the resonance circuit responsive to a sense signal. The sense circuit is configured to generate the sense signal responsive to an output of the mirror device. By monitoring a signal level from the output of the mirror device 130, and adjusting the bias control signal of the resonance circuit, the exact resonance frequency of the resonance circuit can be adjusted until a peak signal level is observed, thus improving the efficiency of the energy transferred from the driver circuit 110 to the mirror device 130, and counteracting the impact of parasitic capacitances on the resonance.

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Patent Owner(s)

Patent OwnerAddress
MICROSOFT TECHNOLOGY LICENSING LLCONE MICROSOFT WAY REDMOND WA 98052

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Galinski, Martin Francis Santa Clara, US 3 1
Park, Chang Joon Sunnyvale, US 71 541

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