Stmicroelectronics Gmbh

Stmicroelectronics S.r.l.

Dadi Sharon

Eli Yaser

Sason Sourani

Offir Duvdevany

Yotam Nachmias

Davide Terzi

Gianluca Mendicino

Guy Amor

Sivan Nagola

A control circuit includes a first control circuit generating a first drive control signal from a pre-drive signal (that is a frequency at which an opening angle of the first and second mirrors is equal) for the first mirror. A second control circuit generates a second drive control signal from the pre-drive signal for the second mirror. First and second drivers generate first and second drive signals for the first and second mirrors from the first and second drive control signals. The first and second drive control signals are generated so that the first and second drive signals each have a same frequency as the pre-drive signal but are different in amplitude from one another to cause the first and second mirrors to move at a same frequency, with a same and substantially constant given opening angle as one another, and in phase with one another.

Driving multiple resonance MEMS mirrors with a single frequency

A system includes a mirror controller driving fast and slow axis mirrors of a projector with fast and slow axis drive signals to reflect a collimated light beam in a scan pattern across the target. The scan pattern includes trace lines which cause display of an input video stream on the target, and retrace lines which operate to return the slow axis mirror to a proper location to begin a next frame of the scan pattern. The slow axis drive signal is generated to maintain a number of trace lines in each frame of the scan pattern constant across frames, but the slow axis drive signal is modified to lock a phase and frequency of the displayed video to a phase and frequency of the input video stream by changing a number of retrace lines in each frame of the scan pattern on a frame-by-frame basis by a non-integer number.

Synchronization of MEMS projector slow axis mirror to input video frame rate

The method for controlling an angular position of a MEMS mirror, includes: applying a first driving moment to the MEMS mirror to generate a rotational scanning movement of the mirror; and, at a zooming instant, applying a second driving moment to the MEMS mirror, wherein the second driving moment is equal to the first driving moment plus an extra moment. The extra moment may be a DC offset. After a transient period of time from zooming instant, a third driving moment M=k{dot over (&#x3b8;)}t is applied. The first and third driving moment are variable linearly with time. The driving moments are applied to torsional springs of the mirror.

Method for controlling position of a linear MEMS mirror with variable resolution and/or light intensity

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Givat Ada, Israel

Dadi Sharon