CN210348513U

CN210348513U - Optical alignment structure applied to fingerprint recognition under screen and electronic equipment

Info

Publication number: CN210348513U
Application number: CN201921702040.5U
Authority: CN
Inventors: 高文才; 孙云刚
Original assignee: Silead Inc
Current assignee: Silead Inc
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-04-17
Anticipated expiration: 2029-10-12

Abstract

The utility model provides an optical alignment structure and electronic equipment applied to fingerprint recognition under a screen, wherein the optical alignment structure is arranged below a display screen of the electronic equipment and is used for carrying out optical alignment treatment on target signal light reflected by a user finger above the display screen; it includes: the body at least can be used for the target signal light to pass through, its upper surface has a plurality of microlens arranged at intervals, the lower surface has light-blocking layers, there are collimation holes corresponding to a plurality of microlens on the light-blocking layer; and the connecting and supporting part is arranged on the upper surface of the body and does not interfere with the micro lens and is used for fixing the optical collimating structure on the lower surface of the display screen. The utility model discloses be applied to the electronic equipment of the optics collimation structure of fingerprint discernment under the screen and configuration this optics collimation structure can realize that microlens optics collimator and display screen directly laminate to eliminate the influence that adopts the laminating of center trompil to center intensity.

Description

Optical alignment structure applied to fingerprint recognition under screen and electronic equipment

Technical Field

The utility model relates to an optical fingerprint identification technical field under the screen especially relates to an optical alignment structure and electronic equipment who is applied to fingerprint identification under screen.

Background

At present, an optical fingerprint identification device under an ultrathin screen mainly adopts an assembly structure of a photosensitive device and a transparent organic material micro-lens optical collimator. As shown in fig. 1, a conventional microlens optical collimating structure 100 made of transparent organic material is composed of a light blocking layer 1 provided with metal openings 101 and microlenses 2.

Because the surface of the transparent organic material microlens optical collimating structure 100 is the microlens structure 2, the surface of the microlens 2 cannot be in direct contact with a display screen or optical cement, otherwise, the microlens interface changes, and the optical collimating effect is affected. Therefore, the collimating structure 100 cannot be directly attached to the display screen at present, and can only be disposed on the middle frame of the mobile phone.

As shown in fig. 2, the conventional microlens optical collimating structure 100 made of transparent organic material is used as an optical collimator for ultra-thin optical fingerprint recognition under a screen, and the collimating structure 100 is disposed in the opening 201 of the middle frame 200 of the mobile phone and is not directly attached to the display screen 300.

Because the middle frame 200 needs to be provided with the opening 201, the strength of the middle frame 200 is reduced, the middle frame 200 is easily damaged, and the fingerprint identification sensor 400 is damaged in severe cases.

SUMMERY OF THE UTILITY MODEL

Based on aforementioned prior art defect, the embodiment of the utility model provides an be applied to optical alignment structure and the electronic equipment who disposes this optical alignment structure of fingerprint discernment under the screen, this optical alignment structure is used for optical fingerprint discernment module under the ultra-thin screen, can realize that microlens optical collimator and display screen directly laminate to eliminate the influence that adopts the laminating of center trompil to center intensity.

In order to achieve the above object, the present invention provides the following technical solutions.

An optical collimation structure applied to fingerprint recognition under a screen is arranged below a display screen of electronic equipment and used for carrying out light collimation processing on target signal light reflected by a user finger above the display screen; the optical collimating structure comprises:

the body at least can be penetrated by the target signal light, a plurality of micro lenses arranged at intervals are formed on the upper surface of the body, a light blocking layer is arranged on the lower surface of the body, and collimation holes corresponding to the micro lenses are formed in the light blocking layer;

and a connection support part provided on the upper surface of the body and not interfering with the micro lens, the connection support part being used for attaching the optical alignment structure to the lower surface of the display screen.

Preferably, the height of the connection support part extending upwards along the upper surface of the body is greater than the height of the micro lens.

Preferably, the connection support portion is cylindrical, the number of the connection support portions is multiple, the connection support portion is arranged between two adjacent micro lenses, and at least one micro lens is arranged between any two connection support portions.

Preferably, the connection support part is annular or arc-shaped, is arranged on the edge of the upper surface of the body and is positioned outside all the micro lenses.

Preferably, the connection support part, the micro lens and the body are integrally constructed.

An electronic device, comprising:

a display screen;

an optical collimating structure as in any above, attached to a lower surface of the display screen by a connecting support;

and the fingerprint chip is arranged below the optical collimation structure.

Preferably, the upper surface of the connecting and supporting part is attached to the lower surface of the display screen, and the outer side wall of the connecting and supporting part located on the outermost side is bonded and fixed to the lower surface of the display screen through adhesive.

Preferably, the lower surface of display screen is equipped with the viscose, the upper surface of connecting the supporting part pass through the viscose with the lower surface bonding of display screen is fixed.

The embodiment of the utility model provides an be applied to the electronic equipment of the optics collimation structure of fingerprint discernment under the screen and configuration this optics collimation structure, set up the joint support portion through the body upper surface at optics collimation structure to optics collimation structure accessible joint support portion connects the display screen lower surface at electronic equipment, can realize the direct laminating of microlens optics collimator and display screen from this and connect, and then eliminate the prior art and need the mode that the trompil set up the collimator on electronic equipment's center and cause the not enough problem of center intensity. Therefore, the application of the optical fingerprint identification module under the ultrathin screen becomes possible.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation. In the drawings:

FIG. 1 is a schematic diagram of a prior art collimating structure;

FIG. 2 is a schematic view of an assembly structure between the collimating structure shown in FIG. 1 and a middle frame of an electronic device;

fig. 3 is a schematic diagram of an optical alignment structure applied to underscreen fingerprint recognition according to an embodiment of the present invention;

fig. 4 is a schematic view of an assembly structure of a first mode between an optical alignment structure applied to fingerprint recognition under a screen and a display screen of an electronic device according to an embodiment of the present invention;

fig. 5 is an assembly structure diagram of a second mode between an optical alignment structure applied to fingerprint recognition under a screen and a display screen of an electronic device according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In this specification, the direction pointing or facing the user of the optical alignment structure 500 of the embodiment of the present invention in the normal use state is defined as "up", and the opposite direction, or the direction departing from the user is defined as "down". Specifically, when the optical alignment structure 500 of the present invention is disposed in an electronic device, the direction in which the display screen 600 of the electronic device points or faces the user is defined as "up", and the direction in which the display screen faces away from the user is defined as "down". More specifically, the upward direction illustrated in fig. 3 to 5 is defined as "up", and the downward direction illustrated in fig. 3 to 5 is defined as "down".

The embodiment of the utility model provides an optics collimation structure 500, it can apply to including but not limited to under the screen in scenes such as fingerprint unblock, user authentication, authority acquisition. Specifically, when the utility model discloses optical alignment structure 500 is disposed in electronic equipment, electronic equipment can acquire user's fingerprint characteristic information based on this optical alignment structure 500 for match with the fingerprint information of storage, with the realization to current user's authentication, thereby confirm whether it has corresponding authority to carry out relevant operation to electronic equipment.

It should be noted that the fingerprint information obtained as described above is only one common example of the user's biometric features. Within the scope that can be envisioned, those skilled in the art can extend the technical solution of the embodiments of the present invention to be applied in any suitable biometric authentication scenario. For example, a scene for verifying by acquiring biometric information of the iris of the user is not limited in the embodiments of the present invention.

The following is set forth in a scenario in which user fingerprint information is obtained as a main description. However, as can be seen from the above description, the scope of the embodiments of the present invention is not limited thereto. The utility model discloses optical alignment structure 500 can be used in electronic equipment including but not limited to mobile smart mobile phone, dull and stereotyped electronic equipment, computer, GPS navigator, personal digital assistant, intelligent wearable equipment etc.

The utility model discloses be applied to optical collimation structure 500 of fingerprint discernment under the screen can set up in the below of electronic equipment display screen 600 for target signal light that the user finger of being applied to by display screen 600 top reflects back carries out the light collimation and handles. The display screen 600 may be a self-luminous display screen using self-luminous units as display pixels, and may be an OLED display screen or an LED display screen, for example. Of course, the display screen 600 may also be an LCD display screen or other passive light emitting display screens, which is not limited by the embodiment of the present invention.

The electronic device may further be configured with a fingerprint chip (not shown), which is disposed below the optical collimating structure 500, and is configured to receive target signal light reflected from a finger of a user above the display screen 600 and subjected to light collimating processing by the optical collimating structure 500, and convert the target signal light into an electrical signal to generate a fingerprint image. The fingerprint chip can further send the fingerprint image to an image processor connected with the fingerprint chip through signals, the image processor carries out image processing to obtain a fingerprint signal, and fingerprint identification is carried out on the fingerprint signal through an algorithm.

As shown in fig. 3 to 5, the optical collimating structure 500 includes a body 501, and the body 501 is at least transparent to the target signal light. Therefore, the material of the body 501 is related to the type of the target signal light. In one embodiment, the display screen 600 is a self-luminous display screen such as an OLED display screen configured with self-luminous units, and the display screen 600 is used as an excitation light source for emitting excitation light to a finger of a user, where the excitation light is reflected by the finger of the user, and the reflected light is target signal light carrying fingerprint information of the user. Therefore, in this case, the target signal light is the same wavelength or type of light emitted from the display screen 600, and is visible light. Therefore, the body 501 may be made of a transparent material such as a light-transmitting organic material, so that the target signal light can be transmitted through the body 501, and then downward and finally reach the fingerprint chip.

A microlens array is formed on the upper surface of the body 501, and the microlens array includes a plurality of microlenses 502 arranged at intervals. The lower surface of the body 501 is provided with a light blocking layer 503, on which alignment holes 503a corresponding to the plurality of microlenses 502 are provided. The light blocking layer 503 may be made of any material capable of blocking the target signal light from passing through, and may be a metal layer, for example. The upper surface of the body 501 is provided with a connection support 504 for attaching the optical collimating structure 500 to the lower surface of the display screen 600. In the present embodiment, the connection support 504 does not interfere with the microlenses 502, that is, the connection support 504 is disposed beside the microlenses 502, including between adjacent microlenses 502, or disposed at the outermost side of all the microlenses 502, so as to avoid blocking or obstructing the target signal light.

As shown in fig. 4, one way of connecting the supporting portion 504 and the display screen 600 may be by frame attaching. Specifically, the upper surface of the connection support portion 504 is attached to the lower surface of the display screen 600, the connection support portion and the display screen 600 are in direct contact, and the outer side wall of the connection support portion 504 located on the outermost side is bonded and fixed to the lower surface of the display screen 600 through the adhesive 700.

As shown in fig. 5, another way of connecting the supporting portion 504 and the display screen 600 may be attaching by full attaching. Specifically, the lower surface of the display screen 600 is provided with an adhesive 700 ', and the upper surface of the connection support portion 504 is bonded and fixed to the lower surface of the display screen 600 through the adhesive 700'. That is, the adhesive 700 'is entirely attached to the lower surface of the display screen 600, and the connection support 504 is in contact with and bonded to the adhesive 700'.

Further, the height of the connection support 504 extending upward along the upper surface of the body 501 is greater than the height of the micro-lens 502. Thus, after the optical collimating structure 500 is fixed on the lower surface of the display screen 600, the top of the micro-lens 502 is spaced from the lower surface of the display screen 600 without contact, so as to prevent the micro-lens 502 from being damaged by being pressed due to the micro-lens 502 touching the lower surface of the display screen 600. Preferably, the height of the connection support 504 is not more than 0.1mm, so as to be suitable for the ultra-thin optical fingerprint identification module under the screen.

The connection support portion 504 may have a cylindrical shape, or may have a ring shape or an arc shape. When the connection supports 504 have a cylindrical shape, the number of the connection supports may be plural, and the connection supports are disposed between two adjacent microlenses 502, and at least one microlens 502 is spaced between any two connection supports 504. When the connecting support portion 504 is annular or arc-shaped, it is disposed on the edge of the upper surface of the body 501 and outside all the microlenses 502. The connection support portion 504 and the micro lens 502 may be integrally configured with the body 501, and specifically, may be formed by upward protruding the upper surface of the body 501.

The embodiment of the utility model provides an be applied to the screen down the optics collimation structure 500 of fingerprint discernment and dispose this optics collimation structure 500's electronic equipment, set up joint support portion 504 through the body 501 upper surface at optics collimation structure 500, thereby optics collimation structure 500 accessible joint support portion 504 connects at electronic equipment's display screen 600 lower surface, can realize that microlens 502 optics collimator and display screen 600's direct laminating connect from this, and then eliminate the prior art and need the mode that the trompil set up the collimator on electronic equipment's center and cause the not enough problem of center intensity. Therefore, the application of the optical fingerprint identification module under the ultrathin screen becomes possible.

It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no order is shown between the two, and no indication or suggestion of relative importance is understood. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above description is only for the embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention according to the disclosure of the application document.

Claims

1. An optical collimation structure applied to fingerprint recognition under a screen is arranged below a display screen of electronic equipment and used for carrying out light collimation processing on target signal light reflected by a user finger above the display screen; characterized in that the optical collimating structure comprises:

2. The optical collimating structure of claim 1, wherein the connecting supports extend upward along the upper surface of the body to a height greater than the height of the microlenses.

3. The optical collimating structure of claim 1, wherein the connecting support portion is a plurality of cylindrical connecting support portions, the connecting support portion is disposed between two adjacent microlenses, and at least one microlens is spaced between any two connecting support portions.

4. The optical collimating structure of claim 1, wherein the connecting support is in a ring shape or an arc shape and is disposed at the edge of the upper surface of the body and outside all the microlenses.

5. The optical collimating structure of claim 1, wherein the connecting supports, microlenses and the body are integrally constructed.

6. An electronic device, comprising:

a display screen;

the optical collimating structure of any one of claims 1 to 5, attached to a lower surface of the display screen by the connection support;

and the fingerprint chip is arranged below the optical collimation structure.

7. The electronic device of claim 6, wherein the upper surface of the connection support part is attached to the lower surface of the display screen, and the outer side wall of the connection support part positioned at the outermost side is fixedly bonded to the lower surface of the display screen through adhesive.

8. The electronic device according to claim 6, wherein an adhesive is provided on a lower surface of the display screen, and an upper surface of the connecting support part is fixed to the lower surface of the display screen by the adhesive.