Diffractive optical waveguide and display device having same
The invention discloses a diffractive optical waveguide and a display device having the same. The diffractive optical waveguide includes a grating structure formed on a surface of a waveguide substrate, the grating structure including a plurality of gate lines arranged in a plane, each of the gate l...
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| Main Authors | , , |
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| Format | Patent |
| Language | Chinese English |
| Published |
17.06.2022
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| Subjects | |
| Online Access | Get full text |
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| Summary: | The invention discloses a diffractive optical waveguide and a display device having the same. The diffractive optical waveguide includes a grating structure formed on a surface of a waveguide substrate, the grating structure including a plurality of gate lines arranged in a plane, each of the gate lines extending in a first direction in the plane and arranged at predetermined intervals in a second direction perpendicular to the first direction; at least one side wall of each grid line is provided with a periodic structure along the first direction; and the grating structure is configured to diffract light incident thereon at a non-zero angle with respect to the plane out of the plane by a predetermined diffraction order. The grating structure adopted in the diffraction optical waveguide can be used for adjusting the diffraction efficiency at different angles and/or different diffraction levels, so that a new effective and flexible means is provided for improving the angle uniformity and/or coupling-out effici |
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| Bibliography: | Application Number: CN202210254157 |