Optical fingerprint identification module and manufacturing method thereof

By setting a dispensing groove structure inside the lens barrel to fix the filter and selecting appropriate filter parameters, the problem of the inability to compress the distance between the lens assembly and the optical sensing chip was solved, achieving further compression of the lens assembly and improvement of fingerprint recognition performance.

CN116129475BActive Publication Date: 2026-03-31SILEAD
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-11-09
Publication Date
2026-03-31

AI Technical Summary

Technical Problem

In existing optical fingerprint recognition modules, the distance between the last lens in the lens assembly and the optical sensing chip cannot be further reduced, causing interference between the lens barrel and gold wires, components, etc., affecting the module performance.

Method used

A dispensing groove structure is provided on the side of the lens housing away from the optical sensor chip in the lens barrel to fix the filter, and the lens assembly is set on the side close to the optical sensor chip. The optical sensor chip is set below the lens assembly. The axial fitting tolerance of the lens assembly is compensated by selecting appropriate filter parameters.

Benefits of technology

This effectively expands the space between the lens barrel and the optical sensing chip, avoiding interference and further compressing the mechanical back focal length of the lens and the stacking height of the terminal, thereby improving fingerprint recognition performance.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN116129475B_ABST
    Figure CN116129475B_ABST
Patent Text Reader

Abstract

The embodiment of the present specification provides an optical fingerprint identification module and a manufacturing method of the optical fingerprint identification module, wherein the optical fingerprint identification module comprises: a lens barrel; the lens barrel has a lens accommodating portion, and a point glue groove structure is arranged on the side away from an optical sensing chip in the lens accommodating portion; an optical filter is fixed in the point glue groove structure; a lens assembly is arranged in the lens accommodating portion of the lens barrel and close to the side of the optical sensing chip; and an optical sensing chip is arranged below the lens assembly. In the embodiment of the present specification, since the point glue groove structure of the lens barrel carrying the optical filter is arranged on the side away from the optical sensing chip, the space between the lens barrel and the optical sensing chip is expanded, so that the lens barrel is not easy to interfere with the gold wire, components and the like below, so that the mechanical back focal length of the lens can be further compressed according to the product performance requirements, and further the stacking height of the terminal carrying the optical fingerprint identification module in the longitudinal direction can also be further compressed.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Optical integrated assembly, camera module and electronic equipment

    CN211406095U