Abstract: A mixed-reality near-eye display system in a head-mounted display (HMD) device includes a display alignment tracker configured for monitoring virtual image pixels in binocular waveguide-based displays and providing adjustments to a display engine to reduce binocular and color misalignments that can occur from thermal expansion of HMD device components and mechanical shock and vibration during device use. Surface relief gratings, located on waveguide combiner plates guiding separate display colors, are configured to in-couple and guide virtual image light from a projector-based display engine and simultaneously out-couple light for the near-eye display and alignment tracking.

Abstract: One example provides a display device comprising a scanning display system comprising a left-eye projector and a right-eye projector. The display device further comprises a controller configured to control the scanning display system to, in a display mode, output stereoscopic display images using the left-eye projector and the right-eye projector. The stereoscopic display images comprise a first field of view (FOV) and a first resolution. The controller is further configured to control the scanning display system to, in an alignment mode, output a left-eye alignment image and a right-eye alignment image respectively using the left-eye projector and the right-eye projector. One or more of the left-eye alignment image or the right-eye alignment image comprises a second FOV that is smaller than the first FOV, and a second resolution that is higher than the first resolution.

Abstract: A mixed-reality near-eye display system in a head-mounted display (HMD) device includes a display alignment tracker configured for monitoring virtual image pixels in binocular waveguide-based displays and providing adjustments to a display engine to reduce binocular and color misalignments that can occur from thermal expansion of HMD device components and mechanical shock and vibration during device use. Surface relief gratings, located on waveguide combiner plates guiding separate display colors, are configured to in-couple and guide virtual image light from a projector-based display engine and simultaneously out-couple light for the near-eye display and alignment tracking.

Abstract: One example provides a display device comprising a scanning display system comprising a left-eye projector and a right-eye projector. The display device further comprises a controller configured to control the scanning display system to, in a display mode, output stereoscopic display images using the left-eye projector and the right-eye projector. The stereoscopic display images comprise a first field of view (FOV) and a first resolution. The controller is further configured to control the scanning display system to, in an alignment mode, output a left-eye alignment image and a right-eye alignment image respectively using the left-eye projector and the right-eye projector. One or more of the left-eye alignment image or the right-eye alignment image comprises a second FOV that is smaller than the first FOV, and a second resolution that is higher than the first resolution.

Abstract: One example provides a method for calibrating a sensor alignment offset on a display device comprising a stereoscopic sensor system and a stereoscopic display system. The method comprises obtaining left and right sensed images using the stereoscopic sensor system, forming a pair of images with binocular divergence based at least upon the left sensed image and the right sensed image, and displaying the pair of images with binocular divergence using the stereoscopic display system. The method further comprises receiving a user input relating to a vertical disparity of the pair of images with binocular divergence in an alignment direction, and based at least upon the user input, calibrating the sensor alignment offset of the left image sensor and the right image sensor in the alignment direction, and applying the sensor alignment offset to adjust the display of images from the stereoscopic sensor system.

Abstract: One example provides a display device comprising a scanning display system comprising a left-eye projector and a right-eye projector. The display device further comprises a controller configured to control the scanning display system to, in a display mode, output stereoscopic display images using the left-eye projector and the right-eye projector. The stereoscopic display images comprise a first field of view (FOV) and a first resolution. The controller is further configured to control the scanning display system to, in an alignment mode, output a left-eye alignment image and a right-eye alignment image respectively using the left-eye projector and the right-eye projector. One or more of the left-eye alignment image or the right-eye alignment image comprises a second FOV that is smaller than the first FOV, and a second resolution that is higher than the first resolution.