Patent ID: 11892631
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC F  G

Claim 0:
1. A near-eye display device configured to output an image of light of each pixel color emitted by a projection-based display; wherein the near-eye display device comprises a plurality of first waveguide structures arranged in a stack, and an ingoing coupling grating structure and an outgoing coupling grating structure; wherein each of first wave guide structures comprises a corresponding ingoing coupling grating of the ingoing coupling grating structure and a corresponding outgoing coupling grating of the outgoing coupling grating structure;
at least one of the first waveguide structures corresponds to light of one pixel color, the ingoing coupling grating structure is configured to transmit the light of pixel colors emitted by the projection-based display into the first waveguide structures, and the outgoing coupling grating structure is configured to output the light of pixel colors;
the near-eye display device further comprises an excitation light source structure configured to provide excitation light to at least one of the first waveguide structures; the outgoing coupling grating structure is further configured to output light of pixel colors corresponding to the first waveguide structures by irradiating and exciting through the excitation light;
wherein the outgoing coupling grating structure comprises: an excitation-light outgoing coupling grating, a monochromatic outgoing coupling grating, and a photoluminescent film made from photoluminescent material, where the excitation-light outgoing coupling grating, the monochromatic outgoing coupling grating and the photoluminescent material film are arranged in a stack in sequence, the photoluminescent material film is plated on a side of the monochromatic outgoing coupling grating away from a first waveguide structure corresponding to the outgoing coupling grating structure; and
the excitation-light outgoing coupling grating is configured to irradiate the excitation light to the photoluminescent film.