公开(公告)号：US20210295008A1

公开(公告)日：2021-09-23

申请号：US17264011

申请日：2019-08-30

Applicant: HiDeep Inc.

Inventor： Nam Seok LEE

IPC: G06K9/00 ,  G02B5/30 ,  H01L27/32 ,  H01L51/52

Abstract: The present invention relates to a display device, and more particularly, to a display device capable of recognizing a fingerprint and enhancing a contrast ratio of a fingerprint pattern. The present invention may include: a cover layer; a linear polarization layer; a phase delay substrate; a plurality of pixels emitting predetermined light; a reflective surface disposed between the phase delay substrate and the plurality of pixels; a photo sensor having a plurality of photo sensor pixels, and receiving an optical signal from a fingerprint which is in contact with or is close to the cover layer and an internal optical noise signal from the reflective surface; and a circular polarizer including a first circular polarization unit passing right-handed circularly polarized light and blocking left-handed circularly polarized light and a second circular polarization unit blocking the right-handed circularly polarized light and passing the left-handed circularly polarized light.