Diffractive optical waveguide and display device having same

• Main Authors: FAN ZHENTAO, TIAN KEHAN, ZHAO XINGMING
• Format: Patent
• Language: Chinese; English
• Published: 06.09.2022
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention discloses a diffractive optical waveguide and a display device, a coupling-out grating of the diffractive optical waveguide comprises a first grating, the first grating is provided with a first grating vector, a second grating vector and a third grating vector, and the direction of the first grating vector is basically consistent with the coupling-in direction. The directions of the second grating vector and the third grating vector respectively face two sides of the direction of the first grating vector and form acute angles with the first grating vector, and the cross section outline of the optical unit structure of the first grating is provided with a first vertex, a second vertex, a third vertex and a fourth vertex which are arranged in sequence; a straight line passing through the first and second vertexes and a straight line passing through the third and fourth vertexes are perpendicular to the first grating vector direction, the straight line passing through the first and fourth vertexes