MEMS Scanning Projector Dynamic Angle Control

The patent implements dynamic adjustment of scan angles through a control system that modifies the vertical and horizontal scan angles in real-time based on detected distance to the projection surface. This dynamic adaptation allows the projector to maintain consistent aspect ratio and spatial density despite changes in projection distance, resolving the contradiction between image size variability and geometric consistency.

The system incorporates a feedback mechanism using a distance detection device (such as a time-of-flight sensor or ambient light sensor) that continuously measures the distance to the projection surface. This feedback information is fed to the control system, which then adjusts the scan angles accordingly, enabling automatic compensation for distance changes and maintaining consistent image geometry.

The patent employs parameter changes by simultaneously adjusting multiple scan parameters (vertical scan angle, horizontal scan angle, and frame rate) in response to distance changes. The control system modifies these parameters in a coordinated manner to maintain both image size and brightness consistency, preventing the brightness inconsistency that would result from scan angle adjustment alone.

The system combines multiple control functions into a unified control system that integrates distance detection, vertical scan angle control, horizontal scan angle control, and frame rate adjustment. This composite control approach allows the system to simultaneously manage multiple parameters to achieve consistent image size and brightness, rather than treating them as separate control problems.