Microlens assembly, preparation method, optical fingerprint module and electronic device

Abstract

The invention relates to a micro-lens assembly, a preparation method, an optical fingerprint module and an electronic device. The micro-lens assembly includes a transparent substrate; an imprinting base which is arranged on the transparent substrate, wherein bulges are arranged on the surface, far away from the transparent substrate, of the imprinting substrate, and a plurality of non-communicatedrecesses are defined by the bulges; a micro-lens array which comprises a plurality of micro-lenses which are arranged on the surface, far away from the transparent substrate, of the imprinting base and are arranged in an array, wherein the micro-lenses are in one-to-one correspondence with the recesses, and the micro-lenses are located in the recesses; a shading layer which completely covers thepart, which is not covered by the micro lenses, of the imprinting substrate and partially covers the micro-lenses; a shading layer which is provided with a plurality of hollow structures in one-to-onecorrespondence with the micro-lenses; in the direction perpendicular to the working surface, the central axis of the hollow structure is collinear with the central axis of the corresponding micro-lenses; in the direction perpendicular to the working face, the projection of the hollow structure on the micro-lenses completely falls on the micro-lenses, and a gap is formed between the projection ofthe hollow structure and the edge of the micro-lenses.

Description

technical field [0001] The invention relates to the field of microlenses, in particular to a microlens component, a preparation method, an optical fingerprint module and an electronic device. Background technique [0002] A microlens array refers to a number of micro-nano-scale lens groups arranged in an array. It not only has the basic functions of focusing and imaging of traditional lenses, but also has the characteristics of small unit size and high integration, which enables it to complete functions that traditional optical components cannot complete, and can constitute many new optical systems. Generally, in order to prevent light with a large oblique angle from entering the microlens and then passing through the imprinted substrate to form an image, grooves are often arranged on the transparent substrate, and a light-shielding material is arranged in the groove to block the incident oblique angle. larger light. However, this method needs to change the structure of th...

AI Technical Summary

Problems solved by technology

However, this method needs to change the structure of the transparent substrate, resulting in a decrease in the strength of the transparent substrate, and may also affect the layout of components such as diodes on the transparent substrate.

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