Microsoft Scanning Mirror Enhancement

Obviously Microsoft is making good use of some previous Microvision employee's skills. Very clever solution to a previously disclosed issue

United States Patent Application 20200004011 CHAMPION; Mark ; et al. January 2, 2020

Assignee: Microsoft Technology

ADJUSTING A RESONANT FREQUENCY OF A SCANNING MIRROR

Abstract

Examples are disclosed that relate to scanning display systems.

Summary:

The scanning mirror system comprises a scanning mirror configured to scan light from the light source in at least one direction at a resonant frequency of the scanning mirror, and also comprises an electromechanical actuator system coupled with the scanning mirror and being controllable by the controller to adjust the resonant frequency of the scanning mirror.

0014] Thus, examples are disclosed that relate to adjusting the resonant frequency of a scanning mirror in a display device to allow a harmonically oscillating scanning mirror to be synchronized with a video data frame rate. As described in more detail below, the disclosed examples may allow a display device to dynamically adapt operation to compensate for manufacturing variances in resonant frequency, variances in video data, and/or to adjust to changes in resonant frequency that may occur over time due to factors such as ageing, temperature, etc. In this way, proper frame display may be achieved without the inclusion of large buffers and/or frame locking mechanisms

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