US 11,988,855 B2
Optical fingerprint sensors
Ho-Tai Lin, Hsinchu (TW); and Shin-Hong Chen, Taichung (TW)
Assigned to VISERA TECHNOLOGIES COMPANY LIMITED, Hsin-Chu (TW)
Filed by VisEra Technologies Company Limited, Hsin-Chu (TW)
Filed on Jun. 25, 2019, as Appl. No. 16/451,130.
Prior Publication US 2020/0410202 A1, Dec. 31, 2020
Int. Cl. G06V 40/13 (2022.01); G02B 5/20 (2006.01); G06V 40/12 (2022.01)
CPC G02B 5/201 (2013.01) [G06V 40/1318 (2022.01); G06V 40/1394 (2022.01); G02B 5/20 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An optical fingerprint sensor, comprising:
a substrate;
a plurality of photoelectric conversion units disposed within the substrate;
a light-shielding layer disposed on the substrate, the light-shielding layer comprising a plurality of through holes extending from a top surface of the light-shielding layer to a bottom of the light-shielding layer, each of the plurality of photoelectric conversion units being aligned with one of the plurality of through holes;
an optical material layer in contact with the light-shielding layer, wherein the optical material layer comprises a non-filtering portion and a filtering portion, the filtering portion comprising an IR cut filter, a red color filter, a green color filter or a blue color filter and the non-filtering portion comprising transparent organic materials;
a glass cover;
a first light source disposed over the light-shielding layer, wherein the first light source comprises an OLED array, the first light source disposed under the glass cover; and
a second light source disposed adjacent to and separate from an end of the first light source, wherein the second light source comprises an IR LED, the second light source disposed under and edge of the glass cover,
wherein the filtering portion comprises a plurality of separated sub-portions, arranged in rows and columns such that the sub-portions in adjacent rows and columns are aligned with each other, and each of the separated sub-portions is entirely surrounded by the non-filtering portion.