A High Efficient Waveguide Display with Space-variant Volume Holographic Gratings

The local period and the slant angle of the SVVHG vary along its tangential direction, enabling variant incident angles to satisfy the Bragg condition of the local gratings. As a result, we enlarge the FOV without using the multiplexing scheme, achieving high efficiency and large FOV at the same time.

We experimentally demonstrate that the proposed display can achieve 31.9% system efficiency for broadband light source and 52.3% for coherent light source,20° FOV, as well as high brightness uniformity, making it a promising candidate for widespread applications in AR industry.