Biological recognition device and electronic device

Abstract

The invention discloses a biological recognition device and an electronic device. The biological recognition device comprises multiple point light sources, a touch screen, a controller, multiple photosensitive elements and a processing circuit, wherein the touch screen is used for determining a contact area of a target object on the biological recognition device; the controller is used for controlling a plurality of point light sources corresponding to the contact area to be turned on in a time-sharing manner so as to transmit light signals to the target object; the multiple photosensitive elements are used for receiving the light signals reflected by the target object and converting the received light signals into corresponding electric signals; and the processing circuit is used for determining biological feature information of the target object according to the electric signals. The electronic device comprises the biological recognition device.

Description

technical field [0001] The invention relates to the field of biometric identification, in particular to a biometric identification device and an electronic device. Background technique [0002] In related technologies, the principle of the optical fingerprint identification module mainly uses the reflection of light on the surface of the glass cover to identify the valley and ridge information of the fingerprint, because when the finger is pressed on the glass cover, the ridge of the fingerprint is in contact with the glass cover, and the The valley of the fingerprint is not connected with the glass cover, so that there is a large difference in the reflected light between the valley and the ridge of the fingerprint, and the reflected light is collected to realize the collection of the fingerprint. [0003] At present, optical fingerprint identification modules are mainly divided into two types, one of which is a fingerprint identification module commonly used in access contr...

AI Technical Summary

Problems solved by technology

Correspondingly, when such a larger fingerprint recognition module is combined with an electronic device (such as a mobile phone), the thickness of the electronic device will be thicker, which is not conducive to the development of the electronic device in the direction of thinning and lightening.

[0005] For the fingerprint identification module using surface light source, the accuracy of collecting the fingerprint image formed by the light emitted by the surface light source and reflected by the finger will be affected by the thickness of the glass cover , when the thickness of the glass increases, the accuracy of the fingerprint image collected due to light scattering will decrease

Correspondingly, when such a fingerprint identification module is placed under the front protective cover of the mobile phone, the fingerprint sensing accuracy of the fingerprint identification module will not be sufficient due to the thick front protective cover.

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