Title:
DISPLAY DEVICE CAPABLE OF FINGERPRINT RECOGNITION
Document Type and Number:
WIPO Patent Application WO/2020/046036
Kind Code:
A1
Abstract:
The present invention relates to a display device, and more specifically, to a display device which is capable of fingerprint recognition and can enhance the contrast ratio of a fingerprint pattern. A display device capable of fingerprint recognition according to an embodiment of the present invention includes: a cover layer; a liner polarization layer disposed under the cover layer; a phase delay substrate disposed under the linear polarization layer; a plurality of pixels which are disposed under the phase delay substrate and emit prescribed light; a reflection surface disposed between the phase delay substrate and the plurality of pixels; a photosensor which is disposed under the reflection surface, has a plurality of photosensor pixels, receives an optical signal from a fingerprint contacting or close to the cover layer, and receives an internal optical noise signal from the reflection surface; and a circular polarization plate which is disposed between the reflection surface and the photosensor, and includes a first circular polarization unit which allows right circularly polarized light to pass therethrough and blocks left circularly polarized light, and a second circular polarization unit, which blocks right circularly polarized light and allows left circularly polarized light to pass therethrough.
Inventors:
LEE NAM SEOK (KR)
Application Number:
PCT/KR2019/011125
Publication Date:
March 05, 2020
Filing Date:
August 30, 2019
Export Citation:
Assignee:
HIDEEP INC (KR)
International Classes:
H01L27/32; H01L51/52
Foreign References:
| JPH07334646A | 1995-12-22 | |||
| JP2003085538A | 2003-03-20 | |||
| KR101807289B1 | 2017-12-11 | |||
| KR20160017419A | 2016-02-16 | |||
| KR20180126883A | 2018-11-28 |
Attorney, Agent or Firm:
KIM, Sung Ho (KR)
Download PDF: