Retinal Projection Display Expanding Eye-Box via Wavefront Multiplexing

The patent divides the single focal point into multiple focal points by using a multiplexed holographic optical element that generates multiple complex wavefronts. Each wavefront is focused at a different position within the eye-box volume, allowing the eye to move within a larger space while maintaining accurate image formation. This segmentation of the focal point directly resolves the contradiction between image accuracy and eye-box volume.

The patent transitions from a single-point focal structure to a multi-point focal distribution by introducing spatial multiplexing in the holographic optical element. This creates a three-dimensional focal point distribution within the eye-box volume, enabling the eye to move in three-dimensional space while maintaining image quality. The dimensional expansion from one point to multiple points in space directly increases the eye-box volume.

The patent segments the single focal point into multiple focal points distributed within the eye-box. The multiplexed holographic optical element generates multiple complex wavefronts, each focused at a different position. This segmentation allows the viewing area to expand while maintaining precise image positioning at each focal point, resolving the contradiction between positioning precision and viewing area.

The patent makes the optical system multi-functional by enabling it to focus light at multiple positions simultaneously. The multiplexed holographic optical element allows the same optical system to serve multiple viewing positions within the eye-box, providing universal image quality across different viewing locations. This multi-functionality expands the viewing area while maintaining positioning precision.