A light-transmitting element, an optical lens, an optical acquisition module and an electronic device

By setting an adjustment film on the light-transmitting substrate, the light transmittance of the light-transmitting element is differentiated, which solves the problem of brightness difference between the center and edge of the image and improves the accuracy of biometric recognition.

CN224341695UActive Publication Date: 2026-06-09BEIJING JIIOV TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
BEIJING JIIOV TECH CO LTD
Filing Date
2025-06-16
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In existing technologies, fingerprint modules integrated under the display screen have a large difference between the brightness at the image edges and the brightness in the center, resulting in low relative illumination of the image. This is especially true after the display screen resolution is improved and the wide-angle characteristics of the lens are applied, making it difficult for the image edge brightness to meet the requirements of fingerprint recognition.

Method used

By setting adjustment films in the central and peripheral areas of the light-transmitting substrate, the light transmittance of the light-transmitting element is adjusted to be differentiated, so that the light transmittance in the central area is less than that in the peripheral area. The lower light transmittance in the central area reduces the light energy in the middle of the image, while the higher light transmittance in the peripheral area maintains or increases the light energy at the edge of the image, thus achieving differentiated distribution of light energy.

Benefits of technology

The relative illumination of the image is improved, and the appropriate exposure time is increased, so that more biometric information can be recorded at the edge of the image, thereby improving the accuracy of biometric identification.

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Abstract

The application provides a light transmission element, an optical lens, an optical acquisition module and an electronic device, relates to the field of biometric identification technology, and realizes that the light transmittance of a corresponding central region of the light transmission element is less than the light transmittance of a corresponding peripheral region of the light transmission element through an adjusting film arranged on a light transmission substrate. When the light transmission element is applied to an optical path of target object identification, the light energy at the middle position of the image can be reduced by means of the lower light transmittance of the central region, and the light energy at the edge position of the image can be maintained or even increased by means of the higher light transmittance of the peripheral region. In this way, the light energy difference between the middle position and the edge position of the image can be reduced, and the relative brightness of the image is improved. Moreover, when imaging, the appropriate exposure time can be increased due to the reduction of the light energy at the middle position of the image, and then the edge position of the image can record more biometric feature information, the biometric feature information can be extracted conveniently, and the accuracy of biometric identification is improved.
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