Light leakage prevention diffraction optical waveguide device and display equipment with same

• Main Authors: FAN ZHENTAO, TIAN KEHAN, SUI LEI, SONG YUMING
• Format: Patent
• Language: Chinese; English
• Published: 27.02.2024
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention discloses a light leakage prevention diffraction optical waveguide device which comprises a waveguide substrate, a coupling-in grating and a coupling-out grating, the coupling-in grating and the coupling-out grating are formed on the substrate, and the coupling-out grating comprises a two-dimensional grating structure formed on one substrate surface of the waveguide substrate. The two-dimensional grating structure comprises a structure surface extending in the direction parallel to the surface of the substrate and a plurality of optical unit structures arranged in an array along the structure surface, the optical unit structures are columnar structures and form end faces and side walls connected between the end faces and the structure surface, and the end faces are inclined relative to the surface of the substrate. According to the light leakage prevention diffraction optical waveguide device, modulation of the depth/height direction of the two-dimensional grating is formed, light leakage on the