Patent ID: 11927782
Assignee: BEIJING RAYBOCH TECHNOLOGY CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 8:
9. The method according to claim 8, wherein the phase retardation device further comprises a second alignment layer, before the determining, based on a preset correspondence between an alignment angle and a helical angle, the preset helical angle of the second subpart of the second liquid crystal layer corresponding to the preset alignment angle, the method further comprises:
obtaining the liquid crystal alignment angle of the first subpart of the second liquid crystal layer; and
aligning the liquid crystals in the first subpart of the second liquid crystal layer at the second alignment layer based on the preset alignment angle, so as to make the liquid crystal alignment angle of the first subpart to be the same as the preset alignment angle.