Patent ID: 11892662
Assignee: LG CHEM, LTD.
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  F  G

Claim 4:
5. The diffraction light gyuide plate of claim 1, wherein each of the first, second and third diffraction grating layers includes:
a first area, wherein light is incident on the first layer;
a second layer, wherein light is incident on the first area is expanded and moves in the second area; and
a third area, wherein light of the second area is extracted into the third area,
wherein the first area of each of the first, second and third diffraction grating layers are at corresponding positions of each of the first, second and third diffraction grating layers, respectively, and
wherein the third area of each of the first, second and third differaction grating layers are at corresponding positions of each of the first, second and third diffraction grating layers, respectively.