Self-focusing lens array for fingerprint identification and mobile terminal

Abstract

The invention discloses a self-focusing lens array for fingerprint identification and a mobile terminal. The self-focusing lens array is disposed below a pixel layer, and is formed by a plurality of self-focusing lenses which have erected real images and whose magnifying power is 1. Each self-focusing lens adopts the gap between pixel elements of the pixel layer as a clear aperture. The inventionis advantageous in that with the self-focusing lens array, the conjugate distance of the object image can be smaller than 7mm, system length can be greatly reduced, and the appearance of the mobile terminal and other functions will not be affected; the imaging process of the whole system can be completed only through the array, no other lens assistance is required, and mounting and adjusting process can be saved; the array area can meet the demand of the size of the mobile terminal screen, which means that imaging can be conducted on every part of the screen; the integral producing cost of thearray is not high, and the array is suitable for commercial production.

Description

technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to a self-focusing lens array and a mobile terminal for fingerprint identification. Background technique [0002] Fingerprint identification refers to identification by comparing the detailed feature points of different fingerprints. Because everyone's fingerprints are different, even between the ten fingers of the same person, there are obvious differences in fingerprints, so fingerprints can be used for identification. The current systems corresponding to fingerprint identification technology can be roughly divided into three categories: optical identification systems, capacitive sensing systems, and radio frequency identification systems. More common products such as fingerprint punching machines and other products use optical systems to identify fingerprints, so as to distinguish different individuals, but from the perspective of system design, a single lens ...

AI Technical Summary

Problems solved by technology

[0006] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a self-focusing lens array and a mobile terminal for fingerprint identification, thereby overcoming the system redundancy of the existing optical fingerprint identification system, inconvenient installation and adjustment, and object-image sharing. The yoke distance is large, the total length of the system cannot meet the thickness of the mobile phone, and the cost is also high

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