FINGERPRINT DETECTION APPARATUS AND ELECTRONIC DEVICE

Title:

FINGERPRINT DETECTION APPARATUS AND ELECTRONIC DEVICE

Document Type and Number:

WIPO Patent Application WO/2021/082017

Kind Code:

A1

Abstract:

Provided are a fingerprint detection apparatus and an electronic device. The fingerprint detection apparatus is used under a display screen, so as to realize under-screen optical fingerprint detection. The fingerprint detection apparatus comprises: a micro lens array provided below the display screen; Z light-blocking layers provided below the micro lens array, each of the Z light-blocking layers being provided with an aperture array, Z being a positive integer; and an optical sensing pixel array, provided below the aperture array of a bottom light-blocking layer among the Z light-blocking layers, the aperture array of each of the Z light-blocking layers satisfying 0 ≤ Xi / Zd ≤ 3. By restricting structural parameters of apertures in the aperture array, sending aliasing of optical signals returned by different positions of a finger can be avoided, i.e. the brightness of the fingerprint image is improved while ensuring the contrast of a fingerprint, the signal-to-noise ratio and resolution of the fingerprint image are increased, and the fingerprint recognition effect and the recognition accuracy are improved.

Inventors:

ZHANG SICHAO (CN)
LIN JUNXIAN (CN)
WANG YIN (CN)
TSAI FEI HSIN (CN)

Application Number:

PCT/CN2019/115162

Publication Date:

May 06, 2021

Filing Date:

November 01, 2019

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SHENZHEN GOODIX TECH CO LTD (CN)

International Classes:

G06K9/00

Foreign References:

CN110062931A	2019-07-26
CN109863506A	2019-06-07
US7834988B2	2010-11-16

Other References: