Detecting breakage of display waveguides

Abstract

A head mounted display (HMD) device includes a frame housing a micro-display or other image projector to project display light and a display waveguide to receive the display light from the image projector. A detection controller determines a breakage status of the display waveguide. The breakage status may be determined based on monitored sensors housed within the frame. For example, a monitored sensor may include an electrically conductive loop positioned around a perimeter of at least a portion of the display waveguide, with one or more electrical contact pads in electrical contact with the electrically conductive loop and communicatively connected to the detection controller to determine the breakage status based on monitored loop resistance of the electrically conductive loop.

Dependencies are inferred from the claim text.