Holographic Display Expanding Viewing Angle via Diffraction Order Segmentation

The patent divides the holographic display into multiple diffraction orders (first, second, third orders) and processes each order separately. Instead of requiring high spatial frequency modulation across the entire window area, the system segments the light beams into different diffraction orders and converges them in separate regions, thereby reducing the spatial frequency requirements for each individual order while maintaining overall image quality.

The patent introduces the diffraction order dimension as an additional parameter for organizing light beams. By utilizing multiple diffraction orders (not just the first order), the system transforms a two-dimensional window area problem into a multi-dimensional solution space, where light beams are distributed across different diffraction orders and converging regions, thereby reducing the spatial frequency density required in any single region.

The patent makes the holographic display system universal by enabling it to serve multiple viewing angles simultaneously. The system generates holographic images in first, second, and third diffraction orders, each accessible from different angular positions. This allows a single display system to accommodate diverse viewing angles and observer positions without requiring multiple separate display devices or complex adjustable mechanisms.

The patent expands the viewing angle capability by utilizing the diffraction order dimension. Instead of limiting the display to a single window area, the system distributes holographic information across multiple diffraction orders, creating accessible viewing regions at different angles. This dimensional approach transforms a single-angle display into a multi-angle display, significantly enhancing adaptability while maintaining resolution through the segmented diffraction order structure.