CN112272249B

CN112272249B - Under-screen fingerprint identification device, preparation method thereof and electronic equipment

Info

Publication number: CN112272249B
Application number: CN202011171173.1A
Authority: CN
Inventors: 陈正杰; 蔡正丰; 王智勇
Original assignee: Yihong Technology Co ltd; Yihong Technology Chengdu Co ltd
Current assignee: Yihong Technology Co ltd; Yihong Technology Chengdu Co ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2022-02-11
Anticipated expiration: 2040-10-28
Also published as: CN112272249A

Abstract

The invention relates to a fingerprint identification device under a screen, a preparation method thereof and electronic equipment, wherein the fingerprint identification device under the screen comprises a display panel, a shading support sheet, a double-sided adhesive tape, a fingerprint identification module and a shading adhesive tape; the shading adhesive tape comprises a platform area and a bending area, wherein the bending area surrounds the platform area, each corner of the bending area of the shading adhesive tape is provided with a first indentation and a second indentation which are intersected, the first indentation is pressed out towards a non-adhesive surface, an included angle formed between the first indentation and the adjacent two sides is 45 degrees, the second indentation is pressed out towards the adhesive surface, the second indentation is parallel to one side of the adjacent two sides, the other side of the adjacent two sides is vertical to the one side, and the distance between the second indentation and the parallel side is equal to the width of the bending area; the bending area is attached to the hollow-out area after being folded along the first indentation and the second indentation, the bending area is attached to the inner edge of the shading supporting sheet, and the platform area covers the interval area between the outer edge of the double-faced adhesive tape and the inner edge of the shading supporting sheet, so that light leakage can be avoided.

Description

Under-screen fingerprint identification device, preparation method thereof and electronic equipment

Technical Field

The invention relates to the technical field of underscreen fingerprint identification, in particular to an underscreen fingerprint identification device, a preparation method thereof and electronic equipment.

Background

With the development of the existing mobile smart phone, the traditional small screen with physical keys is gradually developed to a large screen without the physical keys, and the screen occupation ratio is larger and larger. On the other hand, the fingerprint identification technology is also developed along with the development, and the non-direct contact type of the optical or ultrasonic wave is developed from the traditional module and the direct touch type of the finger. The non-direct contact fingerprint identification technology makes the fingerprint identification module can enter into the cell-phone from the cell-phone outside inside, can carry out fingerprint identification under the screen to can adapt to the demand that the large screen accounts for the ratio, it is comparatively popular in the market at present.

Fingerprint identification device under current screen, as shown in fig. 1, including display panel, shading backing sheet, double faced adhesive tape and fingerprint identification module, one side that display panel deviates from support piece is the demonstration side, and the fretwork district has been seted up to the shading backing sheet, and the fingerprint identification module passes through double faced adhesive tape and pastes on the display panel that the fretwork district corresponds. Considering the dimensional tolerance of the hollowed-out area, the appearance tolerance of the double-sided adhesive tape and the assembly precision of the attaching process, the size of the hollowed-out area is generally required to be designed to be larger than the appearance size of the double-sided adhesive tape, namely, a space is reserved between the double-sided adhesive tape and the foam layer, so that the double-sided adhesive tape and the shading support sheet are prevented from being overlapped due to installation errors, and the thickness of the whole device is increased. However, after the installation of the fingerprint recognition device under the screen is completed, as shown in fig. 2, a circle of blank areas are formed on the display side of the display panel by the space between the double-sided tape and the shading support sheet, and color difference exists between the blank areas and the surrounding areas.

In order to overcome the problem of the color difference, the shading adhesive tape can be attached at the interval between the double-sided adhesive tape and the foam layer, but the shading adhesive tape easily generates wrinkles at the right angle of the hollow area during attachment, so that partial areas cannot be completely attached to cause light leakage, and the display effect and the attractiveness of the fingerprint identification device can be influenced.

Disclosure of Invention

Therefore, it is necessary to provide an underscreen fingerprint identification device, a manufacturing method thereof, and an electronic device to solve the above technical problems.

The invention discloses a device for identifying fingerprints under a screen, which comprises a display panel, a shading support sheet, a double-sided adhesive tape, a fingerprint identification module and a square annular shading adhesive tape, wherein the shading support sheet is arranged on the display panel; the fingerprint identification module is adhered to the display panel corresponding to the hollow area through double-sided adhesive, and a spacing area is arranged between the outer edge of the double-sided adhesive and the inner edge of the shading supporting sheet; the shading adhesive tape comprises a platform area and a bending area, wherein the bending area surrounds the platform area, each corner of the bending area of the shading adhesive tape is provided with a first indentation and a second indentation which are intersected, the first indentation is pressed out towards a non-adhesive surface, an included angle formed between the first indentation and an adjacent two side is 45 degrees, the second indentation is pressed out towards the adhesive surface, the second indentation is parallel to one side of the adjacent two sides, the other side of the adjacent two sides is vertical to the one side, and the distance between the second indentation and the parallel side is equal to the width of the bending area; the bending area is attached to the hollowed-out area after being folded along the first indentation and the second indentation, the bending area is attached to the inner edge of the shading supporting piece, and the platform area covers the interval area.

In one embodiment, the width of the bending region is less than or equal to the thickness of the shading support sheet.

In one embodiment, the width of the double-sided adhesive tape is greater than that of the fingerprint identification module, the width of the platform area is greater than that of the spacing area, and the inner edge of the platform area and the outer edge of the double-sided adhesive tape are overlapped.

In one embodiment, the inner edge of the platform area is pressed below the outer edge of the double-sided adhesive tape, or the inner edge of the platform area is overlapped above the outer edge of the double-sided adhesive tape.

In one embodiment, when the inner edge of the platform area is pressed below the outer edge of the double-sided adhesive tape, the thickness of the double-sided adhesive tape is larger than that of the shading adhesive tape platform area; when the inner edge of the platform area is erected above the outer edge of the double-sided adhesive tape, the thickness of the double-sided adhesive tape is smaller than that of the shading adhesive tape platform area.

In one embodiment, the shading support sheet comprises a foam layer and a copper layer, the copper layer is arranged on one side of the foam layer, which is far away from the display panel, the foam layer is used for protecting the display panel, and the copper layer is used for shielding electromagnetic interference.

In one embodiment, the fingerprint identification module is an ultrasonic fingerprint identification module, and comprises an ultrasonic transmitter and an ultrasonic receiver, wherein the ultrasonic transmitter is used for transmitting ultrasonic waves to a finger of a user, and the ultrasonic receiver is used for receiving reflected ultrasonic waves from the finger of the user and identifying the fingerprint of the user; or, the fingerprint identification module is optics fingerprint identification module, the double faced adhesive tape is transparent double faced adhesive tape, optics fingerprint identification module includes optical sensor, and the light that display panel launches is reflected after reaching the user finger, optical sensor is used for receiving the reflection light that comes from the user finger and discerns the user fingerprint.

The invention also provides electronic equipment which comprises a shell and any one of the underscreen fingerprint identification devices, wherein the underscreen fingerprint identification device is arranged on the shell and is used for displaying pictures and identifying underscreen fingerprints.

The invention also provides a preparation method of the under-screen fingerprint identification device, which comprises the following steps: the shading tape comprises a platform area and a bending area, the bending area surrounds the platform area, the shading tape comprises a first surface and a second surface which are oppositely arranged, and the first surface is a tape surface; performing press cutting on each corner of the first surface bending area to form a first indentation, wherein included angles between the first indentation and the adjacent two sides are 45 degrees; performing press cutting on each corner of the second surface bending area to form a second indentation, wherein the second indentation is intersected with the first indentation, the second indentation is parallel to one side of the adjacent two sides, the other side of the adjacent two sides is vertical to the second indentation, and the distance between the first indentation and the parallel side is equal to the width of the bending area; folding the shading adhesive tape along the first indentation and the second indentation, folding the folding area to be perpendicular to the platform area, then attaching the shading adhesive tape to the hollow area of the shading supporting sheet, attaching the folding area to the inner edge of the shading supporting sheet, and covering the platform area with a spacing area between the outer edge of the double-sided adhesive tape and the inner edge of the shading supporting sheet.

In one embodiment, the fingerprint identification module is firstly pasted on the display panel corresponding to the hollow area through double-sided glue, and then the shading adhesive tape is pasted on the hollow area of the shading supporting sheet; or, the shading adhesive tape is firstly attached to the hollow area of the shading supporting sheet, and then the fingerprint identification module is attached to the display panel corresponding to the hollow area through double-sided adhesive.

The invention discloses an underscreen fingerprint identification device, a preparation method thereof and electronic equipment, which have the beneficial effects that:

according to the under-screen fingerprint identification device, the manufacturing method thereof and the electronic equipment, the shape of the shading adhesive tape is reasonably set, and the first pressing mark and the second pressing mark are arranged at each corner of the bending area of the shading adhesive tape, wherein the first pressing mark is pressed out towards a non-adhesive surface, the included angle between the first pressing mark and the adjacent two sides is 45 degrees, the second pressing mark is pressed out towards the adhesive surface, the second pressing mark is parallel to one side of the adjacent two sides, the other side of the adjacent two sides is vertical to the other side of the adjacent two sides, and the distance between the second pressing mark and the parallel sides is equal to the width of the bending area; the bending area of the shading adhesive tape can be regularly attached to the hollowed-out area after being folded along the first indentation and the second indentation, wherein the bending area is attached to the inner edge of the shading supporting sheet, the platform area covers the interval area between the outer edge of the double-faced adhesive tape and the inner edge of the shading supporting sheet, so that light leakage of the bending area of the interval area or the shading adhesive tape can be avoided, and the display effect and attractiveness of the fingerprint identification device, namely the electronic equipment are guaranteed.

Drawings

Fig. 1 is a longitudinal sectional view of a prior art underscreen fingerprint identification device.

Fig. 2 is a horizontal cross-sectional view of a prior art underscreen fingerprint identification device.

Fig. 3 is a longitudinal sectional view of an underscreen fingerprint identification device provided in accordance with an embodiment of the present invention.

Fig. 4 is a longitudinal sectional view of an underscreen fingerprint identification device provided in accordance with an embodiment of the present invention.

Fig. 5 is a schematic structural view of the light-shielding tape according to an embodiment of the present invention before a first indentation is formed on the light-shielding tape by a blunt knife.

Fig. 6 is a schematic structural view of a light-shielding tape with a first indentation formed by a blunt knife according to an embodiment of the present invention.

Fig. 7 is a schematic structural view of the light-shielding tape according to an embodiment of the present invention after a first indentation is formed thereon.

Fig. 8 is a schematic structural view of the light-shielding tape according to an embodiment of the present invention before a second indentation is formed on the light-shielding tape by a blunt knife.

Fig. 9 is a schematic structural view of a light-shielding tape with a second indentation formed by a blunt knife according to an embodiment of the present invention.

Fig. 10 is a schematic structural view of the light-shielding tape according to an embodiment of the present invention after a second indentation is formed thereon.

Fig. 11 is a schematic structural view of the light-shielding tape according to another embodiment of the present invention after a second indentation is formed thereon.

Fig. 12 is a schematic structural view of the light-shielding tape according to another embodiment of the present invention after a second indentation is formed thereon.

Fig. 13 is a schematic structural view of a bending region of a light-shielding tape just beginning to be folded along a first indentation according to an embodiment of the invention.

Fig. 14 is a schematic structural view of a bending region of a light-shielding tape according to an embodiment of the present invention when the bending region is folded along a first indentation.

Fig. 15 is a schematic structural view of a bending region of a light-shielding tape attached to a side of the bending region under the action of a second indentation according to an embodiment of the present invention.

Reference numerals:

the fingerprint identification device comprises a display panel 100, a light-shielding support sheet 200, a double-sided adhesive tape 300, a fingerprint identification module 400, a light-shielding adhesive tape 500, a platform area 510, a bending area 520, a first indentation 530, a second indentation 540, a boundary frame 550, an accommodating cavity 560, a hollow-out area 610, a white-out area 620 and a spacing area 630; a blunt knife 700; the width D1 of double-sided adhesive tape, the width D2 of fingerprint identification module, the width D3 of platform area, the width D4 of spacer area, the width D5 of bending area, the thickness h1 of shading backing sheet, the thickness of double-sided adhesive tape is h2, and the thickness of shading sticky tape platform area is h 3.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "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," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment. In addition, it should be noted that, in the sectional views in the drawings herein, the section lines are provided for more clearly illustrating the specific structure of the embodiments of the present invention, and in one sectional view, the same section lines schematically represent the same component or represent different components made of the same material, and the shapes of the section lines, including the inclination angle and the spacing distance, do not strictly follow the section line setting of different materials in the mechanical drawing. For example, in the drawings herein, the hatching inclined at 45 ° does not necessarily represent a metal material, but may represent other non-metal materials.

As shown in fig. 1, the current under-screen fingerprint identification device includes a display panel 100, a light-shielding support sheet 200, a double-sided tape 300 and a fingerprint identification module 400, wherein one side of the display panel 100 away from the light-shielding support sheet 200 is a display side, a hollow area 610 is formed in the light-shielding support sheet 200, and the fingerprint identification module 400 is adhered to the display panel 100 corresponding to the hollow area 610 through the double-sided tape 300. Considering the dimensional tolerance of the hollow area 610, the shape tolerance of the double-sided tape 300, and the assembly precision of the attachment process, the size of the hollow area 610 generally needs to be designed to be larger than the shape dimension of the double-sided tape 300, that is, a space 630 is left at the inner edges of the double-sided tape 300 and the light shielding support sheet 200, so as to avoid the double-sided tape 300 and the light shielding support sheet 20 from overlapping due to the installation error, and increase the thickness of the whole device. However, after the installation of the fingerprint identification device under the screen is completed, as shown in fig. 2, a circle of blank areas 620 is formed on the display side of the display panel by the space 630 between the double-sided tape 300 and the light-shielding support sheet 200, and there is a color difference between the blank areas 620 and the surrounding areas, and particularly in an environment with bright light, the defect of the blank areas 620 is more obvious, thereby affecting the display effect and the beauty of the fingerprint identification device.

In order to overcome the problem of color difference, a light-shielding tape may be attached at a gap between the double-sided tape 300 and the inner edge of the light-shielding support sheet 200, but the light-shielding tape may easily wrinkle at a right angle of the hollow area during attachment, which may cause light leakage due to incomplete attachment of a partial area, and may still affect the display effect and the beauty of the fingerprint identification device.

In order to solve the above problems, the invention provides an underscreen fingerprint identification device, a manufacturing method thereof, and an electronic device. In one embodiment, the structure of the under-screen fingerprint identification device is shown in fig. 3, and includes a display panel 100, a light-shielding support sheet 200, a double-sided tape 300, a fingerprint identification module 400, and a light-shielding tape 500; the light shielding support sheet 200 is arranged on the display panel 100, the light shielding support sheet 200 is provided with a hollow area 610, the outer edge of the hollow area 610 corresponds to the inner edge of the light shielding support sheet 200, the fingerprint identification module 400 is pasted on the display panel 100 corresponding to the hollow area 610 through the double-sided tape 300, and a space area 630 is arranged between the outer edge of the double-sided tape 300 and the inner edge of the light shielding support sheet 200; the masking tape includes a platform region 510 and a bending region 520, the bending region 520 surrounds the platform region 510, the masking tape 500 is attached to the hollow region 610, the bending region 520 is attached to the inner edge of the masking support sheet 200, and the platform region 510 covers the spacer region 630, so that the masking tape 500 can prevent light leakage between the outer edge of the double-sided tape 300 and the inner edge of the masking support sheet 200.

As shown in fig. 3, the width of the double-sided tape 300 is D1, the width of the fingerprint identification module 400 is D2, and D1 > D2. In addition, the width of the land area 510 is D3, the width of the spacer 630 between the outer edge of the double-sided tape 300 and the inner edge of the light shielding support sheet 200 is D4, D3 > D4, that is, the inner edge of the land area 510 and the outer edge of the double-sided tape 300 overlap each other, and the inner edge of the land area 510 is overlapped above the outer edge of the double-sided tape 300. It should be noted that, the pasting sequence of the double-sided tape 300 and the light-shielding tape 500 is not limited in the present invention, in the embodiment shown in fig. 3, the fingerprint identification module 400 is firstly pasted on the display panel 100 corresponding to the hollow area 610 through the double-sided tape 300, then the light-shielding tape 500 is pasted on the spacer 630 between the outer edge of the double-sided tape 300 and the inner edge of the light-shielding support sheet 200, at this time, the bending area 520 is pasted on the inner edge of the light-shielding support sheet 200, the platform area 510 covers the spacer 630, and the inner edge of the platform area 510 is built above the outer edge of the double-sided tape 300. It can be understood that, in other embodiments, the light shielding tape 500 may be firstly adhered to the hollow area 610, the bending area 520 of the light shielding tape 500 is adhered to the inner edge of the light shielding supporting sheet 200, and then the fingerprint identification module 400 is adhered to the display panel 100 corresponding to the hollow area 610 through the double-sided tape 300, at this time, the bending area 520 of the light shielding tape 500 is adhered to the inner edge of the light shielding supporting sheet 200, the platform area 510 covers the spacing area 630, and the inner edge of the platform area 510 is pressed below the outer edge of the double-sided tape 300, as shown in fig. 4.

The light-shielding tape 500 is configured before being folded as shown in fig. 7 and 10, the light-shielding tape 500 has a square ring shape having four corners, and the light-shielding tape 500 includes an adhesive surface and a non-adhesive surface facing the device. In addition, as shown by the dotted line boxes in fig. 7 and 10, the boundary frame 550 between the bending region 520 and the land region 510 of the light-shielding tape 500 has a rectangular shape, and each corner of the bending region 520 of the light-shielding tape 500 has a first indentation 530 and a second indentation 540. The formation of first indentations 530 is illustrated in fig. 5 and 6. First, as shown in fig. 5, the position of the first indentation 530 is marked at the corner of the adhesive side of the light shielding tape 500, as shown by the dotted line in fig. 5, the position of the first indentation 530 is located at the bending region 520, and the included angle between the position of the first indentation 530 and the adjacent both sides is 45 °, and then as shown in fig. 6, pressing is performed at the dotted line position using the blunt knife 700, instead of cutting, to form the first indentation 530, that is, the first indentation 530 is pressed out toward the non-adhesive side. The structure of the light-shielding tape 500 after the first pressing mark 530 is formed at each of the four corners of the bending region 520 is shown in fig. 7, and the included angle between the first pressing mark 530 and the adjacent two sides is 45 °.

The second indentations 540 are formed as shown in fig. 8 and 9, first, as shown in fig. 8, the positions of the second indentations 540 are marked at the corners of the non-adhesive surface of the light blocking tape 500, as shown by the dotted lines in fig. 8, the positions of the second indentations 540 are parallel to one side of the adjacent two sides and perpendicular to the other side, and the distance between the second indentations 540 and the parallel side is equal to the width D5 of the bending region 520. Then, as shown in fig. 9, pressing is performed at the dotted line position, not cutting, with a blunt knife 700 to form a second indentation 540, i.e. the second indentation 540 is pressed out towards the tape face. The light-shielding tape 500 has a structure in which the four corners of the tape are formed with second indentations 540, as shown in fig. 8, parallel to one side of the adjacent two sides and perpendicular to the other side, and the distance between the second indentations 540 and the parallel side is equal to the width D5 of the bending region 520.

In one embodiment, the structure of the light shielding tape 500 after the second indentation 540 is formed at each of the four corners of the bending portion 520 is as shown in fig. 10, the bending portion 520 of the light shielding tape 500 sequentially includes a first corner 521, a second corner 522, a third corner 523 and a fourth corner 524 along the clockwise direction, in the embodiment shown in fig. 10, the second indentations 540 of the first corner 521 and the second corner 522 are on the same straight line, and the second indentations 540 of the third corner 523 and the fourth corner 524 are on the same straight line. In the present invention, the extending direction of the second indentations 540 at the four corners of the light-shielding tape 500 is not limited. In another embodiment, as shown in fig. 11, the first corner 521 and the second indentation 540 of the second corner 522 are perpendicular to each other, the third corner 523 and the second indentation 540 of the fourth corner 524 are perpendicular to each other, the first corner 521 and the second indentation 540 of the fourth corner 524 are parallel to each other, and the second corner 522 and the second indentation 540 of the third corner 523 are on the same straight line. In yet another embodiment, as shown in fig. 12, the first corner 521 is perpendicular to the second impression 540 of the second corner 522, the second corner 522 is perpendicular to the second impression 540 of the third corner 523, the third corner 523 is perpendicular to the second impression 540 of the fourth corner 524, and the first corner 521 is perpendicular to the second impression 540 of the fourth corner 524.

As shown by the dotted square in fig. 7 and 10, the boundary frame 550 between the bending region 520 and the platform region 510 of the light-shielding tape 500 is rectangular, and after the first indentation 530 and the second indentation 540 are formed, the first indentation 530 and the second indentation 540 intersect at the top corner of the boundary frame 550. The light-shielding tape 500 may be folded along the first indentation 530 and the second indentation 540, the folding process is as shown in fig. 13 to 15, first, as shown in fig. 13, a corner of the bending region 520 of the light-shielding tape 500 is folded along the first indentation 530, so that the first indentation 530 and the bending regions 520 at two sides thereof are inclined toward the non-adhesive surface of the light-shielding tape 500 until the bending region 520 is upright, that is, the bending region 520 is perpendicular to the platform region 510, as shown in fig. 14, at this time, the bending region 520 of the light-shielding tape 500 and the platform region 510 enclose to form the accommodating cavity 560, an inner cavity wall of the accommodating cavity 560 is the non-adhesive surface, an outer wall of the accommodating cavity 560 is the adhesive surface, and in the bending process, the bending regions 520 at two sides of the first indentation 530 in the accommodating cavity 560 are adhered together under the action of the adhesive surface. Then, the first indentation 530 and the two side bending regions 520 in the receiving cavity 560 are attached to one side of the bending region 520 by the second indentation 540, as shown in fig. 15. Thus, the bending region 520 of the light shielding tape 500 can be folded regularly by the first and

second indentations

530 and 540.

In the embodiment shown in fig. 3 and 4, the light shielding tape 500 is folded along the first indentation 530 and the second indentation 540 and attached to the hollow 610, the folded region 520 is attached to the inner edge of the light shielding supporting sheet 200, and the platform region 510 covers the space region 630 between the inner edge of the light shielding supporting sheet 200 and the outer edge of the double-sided tape 300. As shown in fig. 3 and 4, after the light shielding tape 500 is folded along the first indentation 530 and the second indentation 540, the upper surface of the bending region 520 is flush with the upper surface of the light shielding support sheet 200, i.e., the width D5 of the bending region 520 is equal to the thickness h1 of the light shielding support sheet 200. In another embodiment, when the light shielding tape 500 is folded along the first and

second indentations

530 and 540, the upper surface of the bending region 520 is lower than the upper surface of the light shielding support sheet 200, i.e., the width D5 of the bending region 520 is smaller than the thickness h1 of the light shielding support sheet 200. With such an arrangement, the bending region 520 of the light-shielding tape 500 can be prevented from being higher than or protruding from the upper surface of the light-shielding support sheet 200, and thus the peeling between the bending region 520 of the light-shielding tape 500 and the light-shielding support sheet 200 can be avoided.

In an embodiment, as shown in fig. 3, the fingerprint identification module 400 is firstly adhered to the display panel 100 corresponding to the hollow area 610 through the double-sided tape 300, and then the light-shielding tape 500 is adhered to the space 630 between the outer edge of the double-sided tape 300 and the inner edge of the light-shielding supporting sheet 200, at this time, the bending area 520 is adhered to the inner edge of the light-shielding supporting sheet 200, the platform area 510 covers the space 630, and the inner edge of the platform area 510 is overlapped above the outer edge of the double-sided tape 300. In order to avoid light leakage in the overlapping region caused by too high overlapping region between the inner edge of the mesa region 510 and the outer edge of the double-sided adhesive tape 300, in the embodiment shown in fig. 3, the thickness h2 of the double-sided adhesive tape 300 is less than the thickness h3 of the light blocking tape 500 mesa region 510. In a specific embodiment, h2: h3 is 1:5, for example, when the thickness h2 of the double-sided tape 300 is 10 μm, the thickness h3 of the land region 510 of the light-shielding tape 500 is 50 μm.

In another embodiment, as shown in fig. 4, the light-shielding tape 500 is firstly adhered to the hollow area 610, the bending area 520 of the light-shielding tape 500 is adhered to the inner edge of the light-shielding support sheet 200, and then the fingerprint identification module 400 is adhered to the display panel 100 corresponding to the hollow area 610 through the double-sided tape 300, at this time, the bending area 520 of the light-shielding tape 500 is adhered to the inner edge of the light-shielding support sheet 200, the platform area 510 covers the spacer area 630, and the inner edge of the platform area 510 is pressed below the outer edge of the double-sided tape 300. In order to avoid light leakage in the overlapping region caused by too high overlapping region between the inner edge of the mesa region 510 and the outer edge of the double-sided adhesive tape 300, in the embodiment shown in fig. 4, the thickness h2 of the double-sided adhesive tape 300 is greater than the thickness h3 of the light blocking tape 500 mesa region 510. In a specific embodiment, h2: h3 is 5:1, for example, when the thickness h2 of the double-sided tape 300 is 50 μm, the thickness h3 of the land region 510 of the light-shielding tape 500 is 10 μm.

In addition, in one embodiment, the light shielding support sheet 200 includes a foam layer and a copper layer, the copper layer is disposed on a side of the foam layer away from the display panel 100, the foam layer is used for protecting the display panel 100, and the copper layer is used for shielding electromagnetic interference.

In one embodiment, fingerprint identification module 400 is ultrasonic fingerprint identification module, including ultrasonic transmitter and ultrasonic receiver, ultrasonic transmitter is used for pointing the transmission ultrasonic wave to the user, and the ultrasonic wave takes place to reflect after arriving the user finger, and ultrasonic receiver is used for receiving the reflection ultrasonic wave that comes from the user finger and discerns the user fingerprint. In another embodiment, the fingerprint recognition module 400 is an optical fingerprint recognition module, the double-sided tape 300 is a transparent double-sided tape 300, the optical fingerprint recognition module 400 includes an optical sensor, the light emitted by the display panel 100 reaches the user finger and is reflected, and the optical sensor is used for receiving the reflected light from the user finger and recognizing the fingerprint of the user.

In addition, in one embodiment, the display panel may be an organic light emitting display panel (OLED), and the organic light emitting display panel may be a self-luminous display panel, and may include a plurality of organic light emitting diodes for emitting light, the organic light emitting diodes including an anode, a cathode, and an organic light emitting layer between the anode and the cathode. In another embodiment, the display panel may be an LCM module, the LCM module includes a backlight module and a liquid crystal layer, the backlight module is used as a backlight source of the display panel to provide light for the display panel module, and the liquid crystal layer can function as a light valve to control the emergence of the light of the backlight source by cooperating with the polarizer.

In addition, in an embodiment, the present invention further provides an electronic device, including a housing and the under-screen fingerprint recognition apparatus described above, where the under-screen fingerprint recognition apparatus is mounted on the housing, and is configured to display a picture and perform under-screen fingerprint recognition.

According to the under-screen fingerprint identification device, the manufacturing method thereof and the electronic equipment, the shape of the shading adhesive tape 500 is reasonably set, and the first press mark 530 and the second press mark 540 are arranged at each corner of the bending area 520 of the shading adhesive tape 500, wherein the first press mark 530 is pressed out towards a non-adhesive surface, the included angle between the first press mark 530 and the adjacent two sides is 45 degrees, the second press mark 540 is pressed out towards the adhesive surface, the second press mark 540 is parallel to one side of the adjacent two sides, the other side of the adjacent two sides is vertical to the one side, and the distance between the second press mark 540 and the parallel side is equal to the width of the bending area 520; the bending region 520 of the light shielding tape 500 can be attached to the hollow region 610 regularly after being folded along the first indentation 530 and the second indentation 540, wherein the bending region 520 is attached to the inner edge of the light shielding support sheet 200, and the platform region 510 covers the spacing region 630 between the outer edge of the double-sided tape 300 and the inner edge of the light shielding support sheet 200, so that light leakage at the spacing region 630 or the bending region 520 of the light shielding tape 500 can be avoided, and the display effect and the attractiveness of the fingerprint identification device, i.e., the electronic device, can be ensured.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A fingerprint identification device under a screen is characterized by comprising a display panel, a shading support sheet, a double-sided adhesive tape, a fingerprint identification module and a shading adhesive tape; the fingerprint identification module is adhered to the display panel corresponding to the hollow area through double-sided adhesive, and a spacing area is arranged between the outer edge of the double-sided adhesive and the inner edge of the shading supporting sheet; the shading adhesive tape comprises a platform area and a bending area, wherein the bending area surrounds the platform area, each corner of the bending area of the shading adhesive tape is provided with a first indentation and a second indentation which are intersected, the first indentation is pressed out towards a non-adhesive surface, an included angle formed between the first indentation and an adjacent two side is 45 degrees, the second indentation is pressed out towards the adhesive surface, the second indentation is parallel to one side of the adjacent two sides, the other side of the adjacent two sides is vertical to the one side, and the distance between the second indentation and the parallel side is equal to the width of the bending area; the bending area is attached to the hollowed-out area after being folded along the first indentation and the second indentation, the bending area is attached to the inner edge of the shading supporting sheet, the platform area covers the interval area, the width of the platform area is larger than that of the interval area, and the inner edge of the platform area and the outer edge of the double faced adhesive tape are overlapped.

2. The underscreen fingerprint identification device of claim 1, wherein a width of the bend region is less than or equal to a thickness of the light blocking support sheet.

3. The device of claim 1, wherein the double-sided tape has a width greater than a width of the fingerprint recognition module.

4. The device of claim 3, wherein the inner edge of the landing zone is pressed below the outer edge of the double-sided tape, or wherein the inner edge of the landing zone overlaps the outer edge of the double-sided tape.

5. The device according to claim 3, wherein when the inner edge of the land area is pressed below the outer edge of the double-sided adhesive tape, the double-sided adhesive tape has a thickness greater than the thickness of the masking tape land area; when the inner edge of the platform area is erected above the outer edge of the double-sided adhesive tape, the thickness of the double-sided adhesive tape is smaller than that of the shading adhesive tape platform area.

6. The device of claim 1, wherein the light blocking support sheet comprises a foam layer and a copper layer, the copper layer is disposed on a side of the foam layer away from the display panel, the foam layer is used for protecting the display panel, and the copper layer is used for shielding electromagnetic interference.

7. The device according to claim 1, wherein the fingerprint recognition module is an ultrasonic fingerprint recognition module, and comprises an ultrasonic transmitter and an ultrasonic receiver, the ultrasonic transmitter is used for transmitting ultrasonic waves to the user finger, and the ultrasonic receiver is used for receiving reflected ultrasonic waves from the user finger and recognizing the user fingerprint; or, the fingerprint identification module is optics fingerprint identification module, the double faced adhesive tape is transparent double faced adhesive tape, optics fingerprint identification module includes optical sensor, and the light that display panel launches is reflected after reaching the user finger, optical sensor is used for receiving the reflection light that comes from the user finger and discerns the user fingerprint.

8. An electronic device comprising a housing and the device for identifying fingerprints of any one of claims 1 to 7, wherein the device for identifying fingerprints is mounted on the housing for displaying a picture and performing fingerprint identification.

9. A method of making an underscreen fingerprint identification device as claimed in any one of claims 1 to 7, comprising:

the shading tape comprises a platform area and a bending area, the bending area surrounds the platform area, the shading tape comprises a first surface and a second surface which are oppositely arranged, and the first surface is a tape surface;

performing press cutting on each corner of the first surface bending area to form a first indentation, wherein included angles between the first indentation and the adjacent two sides are 45 degrees; performing press cutting on each corner of the second surface bending area to form a second indentation, wherein the second indentation is intersected with the first indentation, the second indentation is parallel to one side of the adjacent two sides, the other side of the adjacent two sides is vertical to the second indentation, and the distance between the first indentation and the parallel side is equal to the width of the bending area;

folding the shading adhesive tape along the first indentation and the second indentation, folding the folding area to be perpendicular to the platform area, then attaching the shading adhesive tape to the hollow area of the shading supporting sheet, attaching the folding area to the inner edge of the shading supporting sheet, and covering the platform area with a spacing area between the outer edge of the double-sided adhesive tape and the inner edge of the shading supporting sheet.

10. The method for manufacturing the under-screen fingerprint identification device according to claim 9, wherein the fingerprint identification module is firstly attached to the display panel corresponding to the hollow area through double-sided adhesive, and then the shading adhesive tape is attached to the hollow area of the shading support sheet; or, the shading adhesive tape is firstly attached to the hollow area of the shading supporting sheet, and then the fingerprint identification module is attached to the display panel corresponding to the hollow area through double-sided adhesive.