Near-eye Display Eyebox Extension via Dynamic Eye Tracking
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Solution Overview
Problem
Conventional near-eye lightfield displays face a tradeoff between eyebox size and field of view, resulting in a limited eyebox that can lead to occlusion of imagery due to variability in inter-pupillary distance and accurate positioning of the user's eye, causing issues with image clipping or vignetting.
Innovation Solution
The implementation of a dynamic eyebox adjustment technique using eye tracking components to determine the user's eye pose and shift or scale the array of elemental images, allowing for a larger eyebox without reducing the field of view by adjusting the position and size of the elemental images relative to the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the eyebox size is increased in a conventional near-eye lightfield display, then the field of view is reduced, but a larger eyebox is needed to accommodate variability in inter-pupillary distance and eye positioning
Solution Approach 1:
The patent implements dynamic eyebox adjustment by tracking the user's eye pose (position and orientation) and shifting/scale the array of elemental images in real-time. This makes the eyebox adaptable to different eye positions and orientations while maintaining a wide field of view, resolving the contradiction between fixed eyebox size and field of view requirements
Solution Approach 2:
The system changes the position and scale parameters of the elemental image array based on detected eye pose. By dynamically adjusting these parameters, the eyebox can be effectively enlarged and repositioned to accommodate varying inter-pupillary distances and eye positioning accuracy without compromising field of view
2Reliability
If the eyebox size is increased to accommodate variability in inter-pupillary distance, then the field of view is reduced, but user experience deteriorates due to image clipping or vignetting
Solution Approach 1:
The system uses eye tracking to continuously monitor the user's eye pose and provides feedback to the rendering system. This feedback loop enables real-time adjustment of the elemental image array position and scale, ensuring the eyebox remains properly aligned with the user's eye and preventing image clipping or vignetting while maintaining wide field of view
Solution Approach 2:
The system proactively adjusts the elemental image array configuration based on detected eye pose before viewing quality deteriorates. By anticipating and correcting misalignment issues through dynamic adjustment, the system prevents image clipping and vignetting from occurring in the first place
Data Source
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AI summary
A near-eye display system (100) includes a display panel (118) to display a near-eye lightfield frame (120) comprising an array of elemental images (22) and an eye tracking component (106, 108) to track a pose (320) of a user's eye (304). The system further includes a rendering component (104) to position the array of elemental images within the near-eye lightfield frame based on the pose of the user's eye. A method of operation of the near-eye display system includes determining, using the eye tracking component, a first pose (320) of the user's eye and determining a shift vector (324) for an array of elemental images (122) forming a near-eye lightfield frame (120) based on the first pose of the user's eye. The method further includes rendering the array of elemental images at a position (320) within the near-eye lightfield frame that is based on the shift vector.