US 11,455,826 B2Granted

Method for identifying fingerprint, fingerprint identification apparatus and electronic device

AssigneeShenzhen Goodix Technology Co., Ltd.

InventorsXiang Zhong, Weiwen Chen

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Abstract

A method for identifying a fingerprint, a fingerprint identification apparatus and an electronic device are provided. The method includes: acquiring light signals in multiple directions reflected via a sampled object above a display screen; generating a plurality of two-dimensional 2D fingerprint images respectively based on the light signals; determining whether the sampled object is a three-dimensional 3D object based on the plurality of 2D fingerprint images; and if the sampled object is the 3D object, performing fingerprint identification based on at least one of the plurality of 2D fingerprint images. A distinction between a 2D object and a 3D object is effectively achieved through the light signals in the multiple directions, and when the sampled object is a 3D object, subsequent fingerprint identification is performed, which fundamentally avoids performing the fingerprint identification based on a fake fingerprint captured by a 2D object, thereby improving security of the fingerprint identification.

Claims18

Dependent claims

A method for identifying a fingerprint, wherein the method is applicable to an electronic device having a display screen to implement under-screen fingerprint identification, and the method comprises:

acquiring light signals in multiple directions reflected via a sampled object above the display screen;
generating a plurality of two-dimensional (2D) fingerprint images respectively based on the light signals in the multiple directions, wherein a light signal in each direction of the light signals in the multiple directions is configured to generate one of the plurality of 2D fingerprint images;
determining whether the sampled object is a three-dimensional (3D) object based on the plurality of 2D fingerprint images;
and
when the sampled object is the 3D object, performing fingerprint identification based on at least one of the plurality of 2D fingerprint images,
wherein the determining whether the sampled object is the three-dimensional 3D object based on the plurality of 2D fingerprint images, comprises:
determining whether the plurality of 2D fingerprint images are the same;
and
when the plurality of 2D fingerprint images are different, determining that the sampled object is the 3D object;
wherein the determining whether the plurality of 2D fingerprint images are the same, comprises:
when curvature of the plurality of 2D fingerprint images with respect to a same image line is different, determining that the plurality of 2D fingerprint images are different;
and/or
when widths of the plurality of 2D fingerprint images with respect to a same image line are different, determining that the plurality of 2D fingerprint images are different.

10 more elements

A fingerprint identification apparatus, wherein the fingerprint identification apparatus is applicable to an electronic device having a display screen and disposed under the display screen to implement under-screen fingerprint identification;

and
the fingerprint identification apparatus comprises:
an optical sensing pixel array, the optical sensing pixel array being configured to acquire light signals in multiple directions reflected via a sampled object above the display screen;
and
a processor, the processor being connected to the optical sensing pixel array, and the processor being configured to:
receive the light signals in the multiple directions transmitted by the optical sensing pixel array, and generate a plurality of two-dimensional (2D) fingerprint images respectively based on the light signals in the multiple directions, wherein a light signal in each direction of the light signals in the multiple directions is configured to generate one of the plurality of 2D fingerprint images;
determine whether the sampled object is a three-dimensional (3D) object based on the plurality of 2D fingerprint images;
and
when the sampled object is the 3D object, perform fingerprint identification based on at least one of the plurality of 2D fingerprint images,
wherein the processor is specifically configured to:
determine whether the plurality of 2D fingerprint images are the same;
and
when the plurality of 2D fingerprint images are different, determine that the sampled object is the 3D object;
wherein the processor is more specifically configured to:
when curvature of the plurality of 2D fingerprint images with respect to a same image line is different, determine that the plurality of 2D fingerprint images are different;
and/or
when widths of the plurality of 2D fingerprint images with respect to a same image line are different, determine that the plurality of 2D fingerprint images are different.

14 more elements

An electronic device, wherein the electronic device comprises:

a display screen;
and
a fingerprint identification apparatus, wherein the fingerprint identification apparatus is disposed under a display region of the display screen to implement under-screen fingerprint identification;
the fingerprint identification apparatus comprises:
an optical sensing pixel array, the optical sensing pixel array being configured to acquire light signals in multiple directions reflected via a sampled object above the display screen;
and
a processor, the processor being connected to the optical sensing pixel array, and the processor being configured to:
receive the light signals in the multiple directions transmitted by the optical sensing pixel array, and generate a plurality of two-dimensional 2D fingerprint images respectively based on the light signals in the multiple directions, wherein a light signal in each direction of the light signals in the multiple directions is configured to generate one of the plurality of 2D fingerprint images;
determine whether the sampled object is a three-dimensional 3D object based on the plurality of 2D fingerprint images;
and
when the sampled object is the 3D object, perform fingerprint identification based on at least one of the plurality of 2D fingerprint images;
wherein the determining whether the sampled object is the three-dimensional 3D object based on the plurality of 2D fingerprint images, comprises:
determining whether the plurality of 2D fingerprint images are the same;
and
when the plurality of 2D fingerprint images are different, determining that the sampled object is the 3D object;
wherein the determining whether the plurality of 2D fingerprint images are the same, comprises:
when curvature of the plurality of 2D fingerprint images with respect to a same image line is different, determining that the plurality of 2D fingerprint images are different;
and/or
when widths of the plurality of 2D fingerprint images with respect to a same image line are different, determining that the plurality of 2D fingerprint images are different.

16 more elements

Dependencies are inferred from the claim text.