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Lens assembly and fingerprint recognition module

A lens component and lens technology, applied in the field of biometrics, can solve problems such as weak resolution, achieve the effect of improving resolution, improving accuracy and recognition speed, and meeting size restrictions

Active Publication Date: 2019-07-30
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The optical resolution of such an optical fingerprint module system is determined by the period and aspect ratio of the collimation unit. It usually has a better resolution for normal temperature dry fingers, but its resolution is weaker for low temperature dry fingers.

Method used

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  • Lens assembly and fingerprint recognition module
  • Lens assembly and fingerprint recognition module
  • Lens assembly and fingerprint recognition module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0049] figure 1 A schematic diagram of an optical fingerprint module based on the principle of collimated light is shown. Such as figure 1 As shown, the existing optical fingerprint module based on the principle of collimated light is usually glued under the screen component and has a strong correlation with the screen component. in, figure 1 The screen assembly in the device may include a glass cover plate, an organic light-emitting diode (Organic Light-Emitting Diode, OLED) and a glass substrate, and may also include a filter coating and a protective coating under the glass substrate. The glass cover provides a touch interface for the finger's touch operation. For example, when the finger performs fingerprint recognition, touch the surface of the glass cover; the OLED screen unit can be used to display images, and at the same ...

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PUM

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Abstract

Embodiments of the present application relate to a lens assembly and a fingerprint recognition module. The lens assembly includes, in order from the object side to the image side, a first lens, a second lens and a third lens. At least one of two faces of the first lens, two faces of the second lens, and two faces of the third lens is aspheric. The first lens is a negative power lens, the second lens is a positive power lens, and the third lens is a positive power lens. The lens assembly satisfies: 0.5(|Y' / (f*TTL)|(0.8, where Y' represents the maximum image height on the surface of the image side, f represents the focal length of the lens assembly, and TTL represents the distance from the object side to the image side. The lens assembly and the fingerprint recognition module of the embodiments of the present invention can effectively improve the accuracy and recognition speed of optical fingerprint recognition.

Description

technical field [0001] This application relates to the field of biometric identification, in particular to a lens assembly and a fingerprint identification module. Background technique [0002] With the development of fingerprint recognition sensors, electronic devices cancel the physical fingerprint position, and screen fingerprint recognition has become a technical trend; the higher screen ratio of electronic devices can improve the aesthetic design of the appearance and the visual experience of users. Optical fingerprint recognition is a method of realizing fingerprint recognition in the screen display area under the screen (Under-Display) based on optical characteristics. Among them, the imaging principle of optical fingerprint recognition is that the emission unit emits light onto the finger. The peak and valley of the fingerprint absorb and reflect the energy intensity of the emission light differently, so the receiving unit at the bottom of the screen recognizes the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G06K9/00
CPCG02B13/0035G06V40/1318G02B9/12G02B13/24G02B13/04G06V40/1324
Inventor 李林欣葛丛
Owner SHENZHEN GOODIX TECH CO LTD