Adaptive inner loop gain control for laser beam scanning displays

Abstract

This disclosure provides methods and systems that adaptively adjust the gain of the drive signal to a slow-scan mirror to compensate and stabilize the mirror to achieve desired performance metrics. Non-ideal characteristics of the slow-scan mirror, including the mirror and related assembly, exhibit behaviors that impact the overall gain of the device, which changes over time and operating environment. To compensate for these non-ideal characteristics, the drive signal to the slow-scan mirror may need to be adjusted to achieve the desired beam deflection angle. An adaptive inner loop gain control structure may be employed to dynamically adjust the gain of the inner-control loop to achieve a target gain such that the overall gain variations from the slow scan mirror and other components are scan mirror such that compensated and stabilized. The parameters, logic and blocks of the inner loop gain control may be implemented in hardware, software, or combinations thereof.