US 11,816,920 B2
Fingerprint identification apparatus and electronic device
Pan Gao, Guangdong (CN); and Baoquan Wu, Guangdong (CN)
Assigned to SHENZHEN GOODIX TECHNOLOGY CO., LTD., Guangdong (CN)
Filed by SHENZHEN GOODIX TECHNOLOGY CO., LTD., Guangdong (CN)
Filed on Dec. 5, 2022, as Appl. No. 18/074,686.
Application 18/074,686 is a continuation of application No. PCT/CN2021/083430, filed on Mar. 26, 2021.
Prior Publication US 2023/0093839 A1, Mar. 30, 2023
Int. Cl. G06V 40/13 (2022.01); H04N 25/20 (2023.01); H01L 27/146 (2006.01)
CPC G06V 40/1318 (2022.01) [H01L 27/14621 (2013.01); H01L 27/14623 (2013.01); H01L 27/14627 (2013.01); H01L 27/14678 (2013.01); H01L 27/14685 (2013.01); H04N 25/20 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A fingerprint identification apparatus being applicable to an electronic device with a display screen, wherein the fingerprint identification apparatus is configured to be provided under the display screen, and the fingerprint identification apparatus comprises:
a fingerprint sensor chip; and
an infrared radiation cut filter layer provided above the fingerprint sensor chip;
a light blocking layer provided on an upper surface of the infrared radiation cut filter layer by means of coating film, the light blocking layer being provided with a first hole array, and cross sections of first holes in the first hole array being inverse trapezoid;
a light transmitting dielectric layer comprising first color filter units, the first color filter units being formed in part of the first holes in the first hole array to cover the part of the first holes, and the first color filter units being configured to transmit light of at least one waveband among red light, blue light and green light;
a microlens array provided above the light transmitting dielectric layer;
wherein the fingerprint sensor chip is configured to receive an optical signal returned by a finger above the display screen, converged by the microlens array, and then guided by the first hole array, and the optical signal is configured to perform fingerprint identification.