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

Claim 8:
9. A method of manufacturing the diffraction light guide plate of claim 1, the method comprising:
preparing a first diffraction substrate;
preparing a second diffraction substrate; and
attaching the first diffraction substrate and the second diffraction substrate,
wherein the preparing of the first diffraction substrate includes forming a first diffraction grating layer in direct contact with one surface of the first diffraction substrate and forming a second diffraction grating layer in direct contact with an opposite surface of the first diffraction substrate, and
wherein the preparing of the second diffraction substrate includes forming a third diffraction grating layer in direct contact with one surface of the second diffraction substrate and forming a stress compensation layer in direct contact with an opposite surface of the second diffraction substrate.