Method for determining optical sensing correction parameters, biological feature detection device and electronic terminal

Abstract

Embodiments of the present application provide a method for determining optical sensing correction parameters, a biometric feature detection device, and an electronic terminal. The method includes: output data generated by multiple optical sensing units under the irradiation of the same group of optical signals , to determine the light intensity value of the group of light signals, so as to determine the light intensity values ​​of multiple groups of light signals; and then according to the output generated by multiple optical sensing units under the illumination of each group of light signals data, and multiple sets of light intensity values ​​of the light signals, to determine the optical sensing correction parameters of the multiple optical sensing units, so that the optical sensing units have a consistent effect on the optical signals of the same light intensity when performing biometric detection. The light intensity sensing ability can further accurately identify the biological characteristics of the measured object as much as possible, and avoid the phenomenon that the user cannot normally perform normal identity verification through the optical biometric identification device.

Description

technical field [0001] The present application belongs to the technical field of biological feature identification, and in particular relates to a method for determining optical sensing correction parameters, a biological feature detection device and an electronic terminal. Background technique [0002] The optical biometric identification device can be applied in an electronic terminal to perform optical biometric identification, thereby further realizing user identity verification of the electronic terminal. When the measured object is placed on the biometric identification device, the light emitted by the light source passes through the biological tissue of the measured object to form reflected light and shoots to the optical sensing unit of the optical biometric identification device, and the optical sensing unit will receive the light intensity signal Converted into an electrical signal to generate output data. Taking the finger fingerprint as the measured object as an...

AI Technical Summary

Problems solved by technology

[0003] However, the optical biometric identification device usually includes an optical filter and an optical sensing array formed by optical sensing units, and there may be differences between each optical sensing unit; In the terminal, it can use the display unit of the display screen (such as the OLED light source of the OLED display screen) as the excitation light source. Since the bonding between the display screen and the optical filter may be uneven, the optical filter and the optical sensing array may also be uneven. May exhibit uneven fit

Therefore, different optical sensing units have inconsistent sensing capabilities for the same light intensity, which further leads to poor accuracy of the detection results when using the output data of thousands of optical sensing units to determine the biological characteristics of the measured object. , it may eventually appear that the user cannot normally pass the optical biometric identification device for normal identity verification

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