US20240379033
2024-11-14
Physics
G09G3/003
The patent application introduces a system and methods for holographically displaying three-dimensional objects using advanced optical devices. These devices are designed to guide light through an optical guiding device, utilizing multiple colors of light. Key components include an in-coupling diffractive structure to direct the light within the device and a series of out-coupling diffractive structures that redirect the light out of the device in a different direction. This setup aims to enhance display quality by addressing issues such as color crosstalk, zero order light suppression, dispersion compensation, and ambient light blocking.
Recent advancements in 2D projection and 3D rendering have paved the way for new 3D display technologies, integrating head and eye tracking with traditional devices for VR, AR, and MR applications. These techniques strive to emulate holographic imagery by simulating stereo or in-eye light fields. The discussed technology builds on these advancements, offering a compact and efficient solution for high-quality 3D displays.
The technology described aims to suppress unwanted light effects such as display zero order light, which includes reflected or diffracted light that can degrade holographic scenes. By modulating display elements with holograms, the system differentiates between desired diffracted light and undesired zero order light. Techniques include varying display element sizes, using non-uniform patterns like Voronoi diagrams, and manipulating the incident angles of light to minimize interference from zero order light.
The optical device features multiple optically diffractive components tailored for different colors of light. These components work in conjunction with color-selective polarizers that adjust the polarization states of the light. This configuration ensures that each color is efficiently diffracted out of the optical guiding device, enhancing the clarity and precision of the displayed holographic images. The system is designed to maintain consistent optical power across all diffracted lights, ensuring uniformity in display quality.
Various implementations are explored, such as stacking diffractive components with specific diffraction efficiencies and using total internal reflection to propagate light efficiently within the guiding device. These approaches allow for gradual increases in diffraction efficiencies along the guiding path, ensuring even distribution of optical power among all out-coupled lights. Such configurations optimize the performance of holographic displays across different use cases.