CN210573824U - Fingerprint system, optics fingerprint display module assembly and electron device under screen - Google Patents

Abstract

The utility model provides a fingerprint system, optics fingerprint display module assembly and electron device under screen, fingerprint system includes the fingerprint module under the screen, the fingerprint module is established backlight unit with between the display module assembly, the fingerprint module with be equipped with first diffusion rete between the display module assembly, block the fingerprint module through first diffusion rete so that the fingerprint module is invisible in display module assembly's front, under the effect of first diffusion rete, with received backlight unit's emergent light reform light source plane, illuminate the display module assembly to improve display effect and user's visual perception.

Description

Fingerprint system, optics fingerprint display module assembly and electron device under screen

Technical Field

The application relates to the technical field of display, especially, relate to a fingerprint system, optics fingerprint display module assembly and electron device under screen.

Background

The full screen is as the mainstream element of smart mobile phone at present, and the design is shielded to the full screen of fingerprint identification module collocation under the screen, has brought the sense of sight and the good use experience that extremely send for the user.

At present, in order to realize the design of the full-face screen of the smart phone, as shown in fig. 1 and fig. 2, a fingerprint system under the existing Liquid Crystal Display (Liquid Crystal Display, abbreviated as LCD) screen, the system needs to hide the fingerprint module 3 within the black frame at the bottom of the mobile phone, and in the system, the backlight module 1 is in the area near the bottom of the mobile phone, namely, the backlight module 1 has a recessed structure at the end near the fingerprint module 3, the fingerprint module 3 is located in the recessed structure of the backlight module 1 at the bottom of the mobile phone, and the fingerprint module 3 is located between the recessed structures of the LCD Liquid Crystal panel and the backlight module 1.

However, when the fingerprint module 3 is located between the concave structures of the LCD liquid crystal panel and the backlight module 1, as shown in fig. 1 and 2, a certain air gap is supported by the fingerprint module 3 between the LCD liquid crystal panel and the backlight module 1, thereby causing a certain influence on the LCD display effect and the visual perception of the user. For example: observe from cell-phone top direction, the user can see through LCD liquid crystal display panel and see the lateral wall of fingerprint module 3, and the lateral wall of fingerprint module 3 can have the colour difference with the original black limit of cell-phone (be the non-display area of cell-phone LCD liquid crystal display panel promptly), and then influence the display effect, moreover because the existence of above-mentioned air gap, when will leading to observing from different angles, the user can both perceive or feel the existence of air gap, and the regional demonstration of air gap has certain sense of space, and then influences user's visual perception.

SUMMERY OF THE UTILITY MODEL

The utility model provides a fingerprint system, optics fingerprint display module assembly and electron device under screen to solve and prop up certain air gap by the fingerprint module assembly between current LCD liquid crystal display panel and the backlight unit, influence the problem of display effect and user's visual sensation.

In a first aspect, the embodiment of the utility model provides a fingerprint system under screen is applied to the electron device who has display module assembly and backlight unit, fingerprint system includes the fingerprint module under the screen, the fingerprint module is established backlight unit with between the display module assembly, the fingerprint module with be equipped with first diffusion rete between the display module assembly, first diffusion rete is used for sheltering from the fingerprint module assembly is so that the fingerprint module assembly is in display module assembly's front is invisible.

In another embodiment of the present invention, the fingerprint module is located in the recessed structure of the backlight module, so that there is an air gap between the backlight module and the display module, wherein the recessed structure of the backlight module is formed in the edge region of the electronic device.

The utility model discloses an in the concrete implementation mode, first diffusion rete covers the sunk structure with on the fingerprint module, wherein, the visible light haze of first diffusion rete is not less than 70%, just first diffusion rete is used for receiving backlight unit's emergent light reforms the light source plane, in order to illuminate display module assembly.

The utility model discloses an among the concrete implementation mode, be equipped with the fingerprint detection region on the first diffusion rete, the fingerprint detection region does on the first diffusion rete the fingerprint module receives when the reflection light that produces through the fingerprint reflection, the reverberation passes through region on the first diffusion rete.

In a specific embodiment of the present invention, the infrared haze of the fingerprint detection region is not more than 20%.

In a specific embodiment of the present invention, the first diffusion film layer has diffusion particles distributed thereon.

In a specific embodiment of the present invention, the diffusion particles are uniformly distributed on the first diffusion film layer.

In a specific embodiment of the present invention, the diffusion particles are distributed in a gradual manner on the first diffusion film layer toward the direction of the fingerprint module.

In a specific embodiment of the present invention, the distribution density of the diffusion particles on the first diffusion film layer gradually increases along the direction toward the outside edge of the fingerprint module.

In a specific embodiment of the present invention, the diffusion particles are fine particles, and the particle size of the fine particles is 0.01um to 0.10 um.

In a specific embodiment of the present invention, the diffusion particles are infrared-transparent diffusion particles, so that infrared light with a wavelength of 910nm to 970nm is transparent.

In a specific embodiment of the present invention, the diffusion particles are distributed on the surface of the first diffusion film layer or in the first diffusion film layer.

The utility model discloses an among the specific embodiment, backlight unit includes the module body, the module body is close to the one end of fingerprint module is equipped with the sunk structure, the fingerprint module is located in the sunk structure.

In a specific embodiment of the present invention, the recessed structure is a sunken recessed structure formed on the module body.

The utility model discloses an in the concrete implementation mode, the module body includes first horizontal segment, slope section and second horizontal segment, the slope section is located first horizontal segment with between the second horizontal segment, the slope section with the second horizontal segment is in form on the module body the sunken depressed structure.

In a specific embodiment of the present invention, the first diffusion film layer is an orthographic projection region of the inclined section and the second horizontal section on the first diffusion film layer.

In another embodiment of the present invention, when the diffusion particles are distributed on the first diffusion film layer in a gradual manner, the distribution density of the region corresponding to the inclined section on the first diffusion film layer is smaller than the distribution density of the region corresponding to the second horizontal section on the first diffusion film layer.

In another embodiment of the present invention, the first diffusion film layer is kept away from one side of the fingerprint module along the horizontal direction of the display module or the backlight module extends until the end of the display module or the backlight module is flush with the end of the display module.

In a specific embodiment of the present invention, the extension section of the first diffusion film layer is located between the display module and the backlight module.

In an embodiment of the present invention, the backlight module transmits the extension of the first diffusion film layer and the first diffusion film layer, and the uniformity of the display brightness is greater than 85%.

In one embodiment of the present invention, the first diffusion film layer includes a diffusion substrate, and the diffusion particles are distributed on the diffusion substrate.

In one embodiment of the present invention, the diffusion particles and the diffusion substrate are integrated.

In a second aspect, the embodiment of the utility model provides an optical fingerprint display module assembly, optical fingerprint display module assembly includes backlight unit, display module assembly and as above arbitrary fingerprint system under the screen, fingerprint system includes the fingerprint module assembly under the screen, the fingerprint module assembly is established backlight unit with between the display module assembly, just the fingerprint module assembly is established backlight unit's sunk structure is last, the fingerprint module assembly with be equipped with first diffusion rete between the display module assembly.

The utility model discloses an in the concrete implementation, first diffusion rete covers the sunk structure with on the fingerprint module, wherein, the visible light haze of first diffusion rete is not less than 70%, first diffusion rete is used for receiving reform transform light source plane behind backlight unit's the emergent light, in order to illuminate display module assembly.

The utility model discloses an among the concrete implementation mode, backlight unit includes the module body, the module body is close to one of fingerprint module serves and is equipped with sunk structure, the fingerprint module is located in the sunk structure.

The utility model discloses an among the specific implementation mode, the module body includes the light guide plate and does not lead the tabula rase structure, it includes prism rete, second diffusion rete, reflection rete and steel sheet to do not lead the tabula rase structure, the second diffusion rete with the prism rete piles up in proper order the light guide plate is close to one side of first diffusion barrier, the reflection rete with the steel sheet piles up in proper order on the light guide plate with one side that first diffusion barrier is opposite.

In a particular embodiment of the present invention, the fingerprint module is located between the prism film layer and the first diffusion film layer.

In a third aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes any one of the optical fingerprint display modules.

The utility model provides a fingerprint system, optics fingerprint display module assembly and electron device under the screen, the fingerprint system includes the fingerprint module assembly under the screen, the fingerprint module assembly is established between backlight unit and the display module assembly, be equipped with first diffusion rete between fingerprint module assembly and the display module assembly, first diffusion rete is used for sheltering from the fingerprint module assembly so that the fingerprint module assembly is invisible in the front of display module assembly; through set up first diffusion rete between fingerprint module and display module assembly, make the fingerprint module assembly be located under first diffusion rete, block the lateral wall appearance of fingerprint module assembly through first diffusion rete, under the effect of first diffusion rete, with received backlight unit's emergent light reform light source plane, illuminate display module assembly to eliminate the colour difference that the lateral wall of fingerprint module assembly and display module assembly's non-display area exist, with this spatial impression that the elimination spatial clearance leads to simultaneously, make the user be difficult for perceiving or feel the existence of air gap, even make the fingerprint module assembly be in display module assembly's front is invisible, and then promotes user's visual perception. The utility model provides a pair of fingerprint system, optics fingerprint display module assembly and electron device under screen have solved and have been propped up certain air gap by the fingerprint module assembly between current LCD liquid crystal display panel and the backlight unit, influence the problem of display effect and user's visual sensation.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a conventional fingerprint system under a liquid crystal display;

FIG. 2 is a schematic structural diagram of a conventional electronic device with an LCD fingerprint system;

FIG. 3 is a diagram illustrating an appearance of a conventional display module;

fig. 4 is a schematic structural diagram of an underscreen fingerprint system according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a first diffusion film layer according to a second embodiment of the present invention;

fig. 6 is a schematic structural diagram of another first diffusion film layer provided in the second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first diffusion film layer according to a third embodiment of the present invention;

fig. 8 is a schematic structural diagram of another first diffusion film layer provided in the third embodiment of the present invention;

fig. 9 is a schematic structural diagram of an optical fingerprint display module according to a sixth embodiment of the present invention;

fig. 10 is a schematic structural diagram of another optical fingerprint display module according to a sixth embodiment of the present invention.

Description of reference numerals:

a backlight module-1;

a module body-101;

-102, a recessed structure;

a first horizontal segment-103;

an inclined section-104;

a second horizontal segment-105;

prismatic film-106;

a second diffusion membrane layer-107;

a light guide plate-108;

a reflective film-109;

steel plate-110;

a display module-2;

display cover-201;

display Panel-202

A fingerprint module-3;

a first diffusion membrane layer-4;

diffusion particle-401;

a diffusion substrate-402;

fingerprint detection area-403;

extension-5.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to realize the design of smart mobile phone full face screen, as shown in fig. 1 and fig. 2, the fingerprint system under current LCD screen, this system hides fingerprint module 3 in cell-phone bottom black frame, be within the non-display area of cell-phone bottom promptly, and fingerprint module 3 is located cell-phone bottom backlight unit 1's sunk structure in this system, when fingerprint module 3 is in between LCD panel and backlight unit 1's the sunk structure, prop up certain air gap by fingerprint module 3 between LCD panel and the backlight unit 1, will cause certain influence to LCD display effect and user's visual perception from this, for example: as shown in fig. 2, when observing from the top of the mobile phone, the user can see the side wall of the fingerprint module 3 through the LCD panel, and the side wall of the fingerprint module 3 and the original black edge of the mobile phone (i.e. the non-display area of the LCD panel of the mobile phone) will have a color difference, thereby affecting the display effect. In order to solve and to prop up certain air gap by fingerprint module 3 between current LCD liquid crystal display panel and the backlight unit 1, influence the problem of display effect and user's visual sensation, the utility model provides a fingerprint system, optics fingerprint display module 2 and electron device under the screen.

The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Example one

Fig. 4 is a schematic structural diagram of an underscreen fingerprint system according to an embodiment of the present invention.

As shown in fig. 4, the embodiment of the utility model provides a fingerprint system under screen is applied to the electron device who has display module assembly 2 and backlight unit 1, and fingerprint system includes fingerprint module 3 under the screen, and fingerprint module 3 is established between backlight unit 1 and display module assembly 2, is equipped with first diffusion rete 4 between fingerprint module 3 and the display module assembly 2, and first diffusion rete 4 is used for sheltering from fingerprint module 3 so that fingerprint module 3 is invisible in display module assembly 2's front.

In this embodiment, as shown in fig. 4, the fingerprint module 3 is located in the recessed structure of the backlight module 1, so that an air gap exists between the backlight module 1 and the display module 2, wherein the recessed structure of the backlight module 1 is formed in an edge region of the electronic device.

In this embodiment, as shown in fig. 4, the fingerprint module 3 is located below the first diffusion film layer 4 through the arrangement of the first diffusion film layer 4, and the side wall appearance of the fingerprint module 3 is blocked by the first diffusion film layer 4, so that the fingerprint module 3 is not easily perceived by a user from the surface of the display module 2, that is, the fingerprint module 3 is not visible on the front surface of the display module 2; and through the arrangement of the first diffusion film layer 4, when the incident light passes through the first diffusion film layer 4, the incident light is subjected to a plurality of refraction, reflection and scattering phenomena, the incident light can be corrected through the first diffusion film layer 4 to form an even surface light source, namely, a light source plane is formed again, so that the effect of optical diffusion is achieved, the light is softly and evenly scattered to illuminate the display module 2, thereby compared with the prior art, the color difference between the side wall of the fingerprint module 3 and the non-display area of the LCD liquid crystal panel is eliminated, the display effect is improved, meanwhile, the light can be softly and evenly scattered to illuminate the display module 2 through the shielding of the first diffusion film layer 4 on the side wall of the fingerprint module 3 and the first diffusion film layer 4, and further compared with a fingerprint system under an LCD screen in the prior art, the spatial sense existing in an air gap area can be eliminated, and then the visual perception of the user is improved.

In the present embodiment, the first diffusion film layer 4 covers the recess structure and the fingerprint module 3, wherein the visible light haze of the first diffusion film layer 4 is not less than 70%, so that the imaging degree of the visible light of the first diffusion film layer 4 is poor, and the first diffusion film layer 4 is used for reforming the received emergent light of the backlight module 1 into a light source plane and illuminating the display module 2, so as to solve the problem of poor display effect caused by the air gap mentioned in the background art.

Wherein, in this embodiment, first diffusion rete 4 can be for coating or filling the diffusion barrier that has diffusion particle 401, first diffusion rete 4 also can be for ground glass structure or surface unevenness can make the incident light take place the scattering and produce the even light effect and have the high permeability rete structure of lower formation of image degree to visible light, namely, in this embodiment, first diffusion rete 4 includes but not only is limited to the coating or fills the diffusion barrier that has diffusion particle 401, in this embodiment, only need guarantee that first diffusion rete 4 keeps off the lateral wall appearance of fingerprint module 3, make fingerprint module 3 be difficult for being perceived by the user from the surface of display module 2, and through the setting of first diffusion rete 4, can make the incident light take place the scattering and produce even light effect can.

Further, in this embodiment, the first diffusion film layer 4 covers the recess structure and the fingerprint module, wherein the visible light haze of the first diffusion film layer is not less than 70%, and the received emergent light of the backlight module 1 is reformed into a light source plane to illuminate the display module 2, because the visible light haze of the first diffusion film layer 4 is not less than 70%, the imaging difficulty of the visible light when penetrating through the first diffusion film layer 4 is increased, so that the imaging degree of the visible light on the first diffusion film layer 4 is low, and a user can hardly observe the fingerprint module 3 through the surface of the display module 2, so as to eliminate the color difference between the side wall of the fingerprint module 3 and the non-display area of the display module 2, thereby improving the display effect and the visual perception of the user.

In this embodiment, in order to ensure the covering effect of the first diffusion film layer 4 on the fingerprint module 3, the area of the cross-sectional shape of the first diffusion film layer 4 is not smaller than the recessed structure of the backlight module 1.

Wherein, in this embodiment, the first diffusion film layer 4 is covered on the concave structure of the backlight module 1, so as to better cover the side wall profile of the fingerprint module 3, since visible light is diffused on the first diffusion film layer 4 after being transmitted, resulting in a low degree of imaging, therefore, through the arrangement of the first diffusion film layer 4, the user can hardly perceive the fingerprint module 3 from the surface of the display module 2, and because the first diffusion film layer 4 can reform the received emergent light of the backlight module 1 into a light source plane, namely, the first diffusion film layer 4 can scatter the incident light to generate the uniform light effect to illuminate the display module 2, therefore, the color difference between the side wall of the fingerprint module 3 and the non-display area of the display module 2 can be eliminated through the first diffusion film layer 4, and the display effect and the visual perception of a user are further improved.

Wherein, in this embodiment, still can normally form images after penetrating through first diffusion rete 4 in order to guarantee fingerprint module 3, realize fingerprint registration and recognition function, as shown in fig. 1, be equipped with fingerprint detection area 403 on the first diffusion rete 4, fingerprint detection area 403 is when fingerprint module 3 receives the reflection light that the fingerprint reflection produced on first diffusion rete 4, the reverberation passes through the region on the first diffusion rete 4, the infrared light haze of fingerprint detection area 403 is not more than 20%, guarantee that the infrared light of fingerprint detection area 403 on the first diffusion rete 4 promptly sees through, and the light angle changes when making visible light penetrate to a certain extent, the imaging degree descends.

In the present embodiment, the haze refers to the percentage of the total transmitted light intensity of the transmitted light intensity which deviates from the incident light by an angle of 2.5 ° or more, and a larger haze means a decrease in the film gloss and transparency, particularly, the degree of image formation. Therefore, the imaging degree of the visible light in the fingerprint detection area 403 on the first diffusion film layer 4 is low, so that the user can hardly observe the fingerprint module 3 through the surface of the display module 2, and the color difference between the side wall of the fingerprint module 3 and the non-display area of the display module 2 is eliminated, thereby improving the display effect and the visual perception of the user, as shown in fig. 3, the display module 2 can display an appearance image compared with the existing LCD liquid crystal panel for eliminating the color difference and the gap sense of space.

Therefore, the embodiment of the present invention provides an under-screen fingerprint system, which comprises a fingerprint module 3, the fingerprint module 3 is disposed in a recessed structure of a backlight module 1, and the fingerprint module 3 is located at a side of the backlight module 1 facing a display module 2, a first diffusion film layer 4 is disposed between the fingerprint module 3 and the display module 2, the first diffusion film layer 4 is disposed between the fingerprint module 3 and the display module 2, so that the fingerprint module 3 is located below the first diffusion film layer 4, the first diffusion film layer 4 blocks the shape of the side wall of the fingerprint module 3, under the action of the first diffusion film layer 4, the received emergent light from the backlight module 1 is reformed into a light source plane to illuminate the display module 2, thereby eliminating the color difference between the side wall of the fingerprint module 3 and the non-display area of the display module 2, and eliminating the spatial sense caused by the spatial gap at the same time, and the user is not easy to perceive or feel the existence of the air gap, thereby improving the visual perception of the user. The utility model provides a pair of fingerprint system, optics fingerprint display module assembly 2 and electron device have solved between current LCD liquid crystal display panel and the backlight unit 1 and have been propped up certain air gap by fingerprint module assembly 3, influence the problem of display effect and user's visual sensation.

Example two

Fig. 5 is a schematic structural view of a first diffusion film layer provided in the second embodiment of the present invention, and fig. 6 is a schematic structural view of another first diffusion film layer provided in the second embodiment of the present invention.

Further, on the basis of the first embodiment, in the present embodiment, as shown in fig. 5 and fig. 6, the diffusion particles 401 are distributed on the first diffusion film layer 4.

In this embodiment, by distributing the diffusion particles 401 on the first diffusion film layer 4, under the action of the diffusion particles 401, when the light passes through the first diffusion film layer 4, the diffusion particles 401 may change the propagation direction or path of the light, such as: make light can take place many refraction, reflection and scattering phenomena, so caused the effect of optical diffusion to increase the visible light haze of first diffusion rete 4, reduce the image forming degree of visible light, make the difficult surface through display module 2 of user observe fingerprint module 3, with the colour difference that exists between the lateral wall of elimination fingerprint module 3 and the non-display area of display module 2, and then promote display effect and user's visual perception.

Further, in this embodiment, as shown in fig. 5 and fig. 6, the diffusion particles 401 are distributed on the first diffusion film layer 4 in a gradual manner in a direction toward the fingerprint module 3, and the distribution density of the diffusion particles 401 on the first diffusion film layer 4 gradually increases along the direction toward the outer edge of the fingerprint module 3, that is, the distribution density of the diffusion particles 401 on the first diffusion film layer 4 near the outer edge of the fingerprint module 3 is larger, and the distribution density of the diffusion particles 401 on the first diffusion film layer 4 is distributed in a gradual manner, so that the uniformity of the brightness on the first diffusion film layer 4 can be compensated as much as possible by combining the characteristics and the structure of the diffusion particles 401, and the display effect of the display module 2 is further improved.

Wherein, in this embodiment, in order to include the even light of emergence that first diffusion rete 4 can be better, and the optical scattering effect, diffusion particle 401 is the fine particle, the particle diameter of fine particle is 0.01um-0.10um, it has guaranteed that light can not penetrate away from directly in first diffusion rete 4 to be equipped with the different diffusion particle 401 of particle diameter size on first diffusion rete 4, thereby atomized effect has been played, make the difficult surface observation who passes through display module 2 of user fingerprint module 3, with the colour difference that exists between the lateral wall of eliminating fingerprint module 3 and the non-display area of display module 2, and then promote display effect and user's visual perception.

In this embodiment, the diffusion particles 401 are infrared-transmitting diffusion particles 401, so that infrared light with a wavelength of 910nm to 970nm is transmitted while the haze of visible light is increased, and the imaging capability of visible light is reduced, in this embodiment, the haze of infrared light in the fingerprint detection area 403 is not greater than 20%.

In this embodiment, the diffusion particles 401 are chemical particles that transmit infrared light, that is, the diffusion particles 401 are particulate matter prepared from a material with high transmittance to infrared light, where the material with high transmittance to infrared light in the prior art includes monocrystalline polycrystalline, glass, ceramic, plastic, diamond-like carbon, and other varieties, the monocrystalline mainly includes germanium and silicon semiconductors as infrared light materials, and the other type of monocrystalline is an ionic crystal and is an alkali or alkaline earth metal halide.

Wherein, in this embodiment, diffusion particle 401 can be spherical, and diffusion particle 401 also can be the particle shape of other shapes, in this embodiment, only needs to guarantee, under diffusion particle 401's effect, and light is in being focused on certain exit angle when passing through these diffusion particle 401 to reach the function of reinforcing emergent light brightness, guarantee that light can not follow the diffusion barrier and penetrate away directly, play certain atomization effect can.

In this embodiment, the diffusion particles 401 are distributed on the surface of the first diffusion film layer 4 or in the first diffusion film layer 4, that is, in this embodiment, the diffusion particles 401 may be distributed on the surface of the first diffusion film layer 4 or in the first diffusion film layer 4, in this embodiment, no matter how the diffusion particles 401 are distributed on the first diffusion film layer 4, it is only necessary to ensure that the first diffusion film layer 4 on which the diffusion particles 401 are distributed can have a certain light-uniformizing and atomizing effect.

In this embodiment, another structure of the first diffusion film layer 4 is provided, and the difference between the structure of the first diffusion film layer 4 and the structure of the first diffusion film layer 4 is that, as shown in fig. 5, the density of the diffusion particles 401 in the fingerprint detection region 403 on the first diffusion film layer 4 is less than the distribution density of the periphery of the fingerprint detection region 403 on the first diffusion film layer 4, and in this embodiment, the distribution density of the diffusion particles 401 in the fingerprint detection region 403 on the first diffusion film layer 4 is reduced, so that the infrared haze of the fingerprint detection region 403 is not greater than 20%.

EXAMPLE III

Further, in the present embodiment, different from the second embodiment, as shown in fig. 7 and fig. 8, the diffusion particles 401 are uniformly distributed on the first diffusion film layer 4, and the haze of the visible light on the first diffusion film layer 4 is not less than 70% and the haze of the infrared light of the fingerprint detection area 403 on the first diffusion film layer 4 is not more than 20% due to the diffusion particles 401 uniformly distributed on the first diffusion film layer 4.

Specifically, in this embodiment, the visible light haze on the first diffusion film layer 4 can be not less than 70% by adjusting the distribution density of the diffusion particles 401 on the first diffusion film layer 4. In this embodiment, in order to ensure that the infrared haze of the fingerprint detection region 403 on the first diffusion film layer 4 is not more than 20%.

Specifically, as shown in fig. 7, in the present embodiment, the distribution density of the diffusion particles 401 on the first diffusion film layer 4 can be uniformly adjusted, so that the infrared haze of the fingerprint detection area 403 on the first diffusion film layer 4 is not greater than 20%; alternatively, as shown in fig. 8, in this embodiment, on the basis of ensuring that the visible light haze on the first diffusion film layer 4 is not less than 70%, the infrared light haze of the fingerprint detection region 403 is not greater than 20% by reducing the distribution density of the diffusion particles 401 in the fingerprint detection region 403.

Example four

Further, on the basis of the first and second embodiments, as shown in fig. 4, the backlight module 1 includes a module body 101, a recessed structure 102 is disposed at one end of the module body 101 close to the fingerprint module 3, and the fingerprint module 3 is located in the recessed structure 102.

Wherein, in this embodiment, fingerprint module 3 is located recessed structure 102 and is in between display module assembly 2 and backlight unit 1, certain air gap is propped up by fingerprint module 3 between display module assembly 2 and the backlight unit 1, this air gap can be for the air gap that vertical distance is less than 1.5mm, because the existence of air gap, will cause certain influence to can display effect and user's visual perception, just as the first diffusion rete 4 that is located between fingerprint module assembly 3 and the display module assembly 2 of above-mentioned embodiment, can effectually eliminate the influence that this air gap caused to display effect and user's visual perception, and then promote display effect and user's visual perception, in this embodiment, no longer do a statement to it.

In the embodiment, the recess structure 102 is a sunken recess structure 102 formed on the module body 101.

It should be noted that there are many ways to form the sunken structure on the module body 101, and the sunken structure 102 may be formed differently according to different forming ways. In this embodiment, the sunken structure 102 can be inclined to form the sunken structure 102 by setting a certain angle, or can be connected to the module body 101 by a downward-sunken arc to form the sunken structure 102, in this embodiment, the forming mode and the structure of the sunken structure 102 are not further limited, and only when the fingerprint module 3 is placed in the sunken structure 102, a certain air gap exists between the backlight module 1 and the display module 2.

In this embodiment, the module body 101 includes a first horizontal segment 103, an inclined segment 104 and a second horizontal segment 105, the inclined segment 104 is located between the first horizontal segment 103 and the second horizontal segment 105, a higher end of the inclined segment 104 is connected to the first horizontal segment 103, a lower end of the inclined segment 104 is connected to the second horizontal segment 105, the inclined segment 104 and the second horizontal segment 105 form a sunken-type concave structure 102 on the module body 101, and the fingerprint module 3 is located on the second horizontal segment 105.

In this embodiment, the first horizontal segment 103, the inclined segment 104 and the second horizontal segment 105 are an integrated structure, and the inclination angle of the inclined segment 104 can be set according to the height of the fingerprint module 3 or other design criteria in practical application, that is, in this embodiment, the inclination angle of the inclined segment 104 is not further limited.

In this embodiment, the first diffusion film layer 4 is an orthographic projection area of the inclined section 104 and the second horizontal section 105 on the first diffusion film layer 4, that is, the first diffusion film layer 4 is disposed right above the inclined section 104 and the second horizontal section 105, and is used for shielding the concave structure on the backlight module 1.

In this embodiment, when the diffusion particles 401 are distributed on the first diffusion film layer 4 in an asymptotic manner, in order to ensure that the diffusion particles 401 are distributed on the first diffusion film layer 4 in an asymptotic manner toward the outer edge of the fingerprint module 3, the distribution density of the diffusion particles 401 in the region of the first diffusion film layer 4 corresponding to the inclined section 104 is less than the distribution density of the diffusion particles 401 in the region of the first diffusion film layer 4 corresponding to the second horizontal section 105.

EXAMPLE five

Further, on the basis of the first to third embodiments, in this embodiment, one side of the first diffusion film layer 4, which is far away from the fingerprint module 3, extends along the horizontal direction of the display module 2 or the backlight module 1 until being flush with the end of the display module 2 or the backlight module 1, and the extension section 5 of the first diffusion film layer 4 is located between the display module 2 or the backlight module 1.

It should be noted that, in this embodiment, extension section 5 of first diffusion rete 4 can be laminated with the one side that display module assembly 2 is close to backlight unit 1, extension section 5 of first diffusion rete 4 also can be laminated with the one side that backlight unit assembly 1 is close to display module assembly 2, it is corresponding, first diffusion rete 4 can be laminated with the one side that fingerprint module assembly 3 is close to display module assembly 2, first diffusion rete 4 also can be laminated with the one side that display module assembly 2 is close to fingerprint module assembly 3, in this embodiment, extension section 5 of first diffusion rete 4 and first diffusion rete 4 is the integral structure, and diffusion particle 401 is not arranged or is arranged less on its extension section 5, in order to reduce the influence that diffusion rete shows luminance to display module assembly 2.

In this embodiment, the uniformity of the display brightness of the backlight module 1 after passing through the first diffusion film layer 4 and the extension section 5 of the first diffusion film layer 4 is greater than 85%.

In this embodiment, since the diffusion particles 401 are distributed on the first diffusion film layer 4 in a gradual and gradual manner, the uniformity of the display luminance of the first diffusion film layer 4 and the extension section 5 of the first diffusion film layer 4 is greater than 85% by adjusting the distribution density of the diffusion particles 401, so as to improve the display effect.

In the present embodiment, the first diffusion film layer 4 includes a diffusion substrate 402, and the diffusion particles 401 are distributed on the diffusion substrate 402, wherein in the present embodiment, the diffusion substrate 402 is a transparent diffusion substrate 402, and the diffusion substrate 402 includes but is not limited to a polyethylene terephthalate (PET) base material.

In this embodiment, the diffusion particles 401 and the diffusion substrate 402 are integrated, and the diffusion particles 401 may be deposited on the surface of the diffusion substrate 402 or distributed in the diffusion substrate by using other processes.

EXAMPLE six

Fig. 9 is a schematic structural diagram of an optical fingerprint display module according to a fifth embodiment of the present invention, and fig. 10 is a schematic structural diagram of another optical fingerprint display module according to a fifth embodiment of the present invention.

Further, on the basis of above-mentioned embodiment, as shown in fig. 9 and fig. 10, this embodiment provides an optical fingerprint display module 2, optical fingerprint display module 2 includes backlight unit 1, display module 2 and as above under the screen fingerprint system in any embodiment, under the screen fingerprint system includes fingerprint module 3, fingerprint module 3 establishes between backlight unit 1 and display module 2, and fingerprint module 3 establishes in backlight unit 1's sunk structure, be equipped with first diffusion rete 4 between fingerprint module 3 and the display module 2.

In this embodiment, as shown in fig. 4, 9 and 10, by the arrangement of the first diffusion film layer 4 in the optical fingerprint display module 2, the fingerprint module 3 is located below the first diffusion film layer 4, the side wall of the fingerprint module 3 is blocked by the first diffusion film layer 4, so that the fingerprint module 3 is not easily perceived by a user from the surface of the display module 2, and by the arrangement of the first diffusion film layer 4, when incident light passes through the first diffusion film layer 4, an even surface light source is formed, that is, a light source plane is formed again, so as to achieve the effect of optical diffusion, the light is diffused softly and uniformly to illuminate the display module 2, thereby compared with the prior art, the color difference between the side wall of the fingerprint module 3 and the non-display area of the LCD liquid crystal panel is eliminated, the display effect is improved, and by the blocking of the side wall of the fingerprint module 3 by the first diffusion film layer 4 and the first diffusion film layer 4, the light can be softly and uniformly diffused to illuminate the display module 2 Show module 2, and then compare finger print system under the LCD screen among the prior art, can eliminate the sense of space that the air gap region exists, then promote user's visual perception.

In this embodiment, the first diffusion film layer 4 covers the recess structure and the fingerprint module, wherein the visible light haze of the first diffusion film layer 4 is not less than 70%, and the first diffusion film layer 4 is used for reforming a light source plane after receiving the emergent light of the backlight module 1 to illuminate the display module 2.

Wherein, like the above embodiment, the haze of the infrared light of the fingerprint detection area 403 of the first diffusion film layer 4 is not more than 20%, that is, the wavelength of the fingerprint detection area 403 is greater than 80% at the infrared light spot transmittance of 910nm-970nm, so that the side wall appearance of the fingerprint module 3 can be blocked by the visual effect, and the display space feeling can be eliminated.

Wherein, in this embodiment, backlight unit 1 includes module body 101, and module body 101 is close to one of fingerprint module 3 and serves and be equipped with sunk structure 102, and fingerprint module 3 is located sunk structure 102.

The recessed structure 102 in this embodiment is described in three embodiments, and in this embodiment, the structure thereof will not be further described.

In this embodiment, the module body 101 includes a light guide plate 108 and a non-light-guide plate 108, the non-light-guide plate 108 includes a prism film layer 106, a second diffusion film layer 107, a reflective film 109 and a steel plate 110, the second diffusion film layer 107 and the prism film layer 106 are sequentially stacked on one side of the light guide plate 108 close to the first diffusion film, and the reflective film layer 109 and the steel plate 110 are sequentially stacked on one side of the light guide plate 108 opposite to the first diffusion film. The fingerprint module 3 is located between the prism film 106 and the first diffusion film 4.

It should be noted that, in this embodiment, through the arrangement of the first diffusion film layer 4 and/or the extension section 5, besides the problem that a certain air gap is supported by the fingerprint module 3 between the existing LCD liquid crystal panel and the backlight module 1, which affects the display effect and the visual perception of the user, because the first diffusion film layer 4 and/or the extension section 5 is located at the uppermost side of the backlight module 1, that is, above the prism film layer 106, the softness of the light source can be improved, and the function of diffusing and protecting the prism film layer 106 can be achieved. The module body 101 is a conventional module, and in this embodiment, the film layers of the module body are not further described.

In this embodiment, the display module at least includes a display cover 201 and a display panel 202, the display cover 201 is located on the display panel 202, that is, the display cover 201 is located on a side of the display panel 202 away from the backlight module, the display cover 201 and the display panel 202 are attached to the side away from the backlight module, and the first diffusion film layer and the extension section of the first diffusion film layer are located under the display panel 202 and attached to the display panel 202.

In the present embodiment, the display cover 201 includes but is not limited to a glass cover, the display panel 202 includes but is not limited to a liquid crystal panel, and the display module is a conventional one, and will not be further described in the present embodiment.

EXAMPLE seven

Further, on the basis of the above embodiment, the embodiment of the present invention provides an electronic device, which includes the optical fingerprint display module 2 in the fifth embodiment, wherein the electronic device can specifically be an electronic product or a component such as a liquid crystal display device, electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator, a fingerprint lock, etc.

In the description of the present invention, it is to be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (28)

1. The utility model provides a fingerprint system under screen, is applied to the electron device who has display module assembly and backlight unit, a serial communication port, fingerprint system includes the fingerprint module under the screen, the fingerprint module is established backlight unit with between the display module assembly, the fingerprint module with be equipped with first diffusion rete between the display module assembly, first diffusion rete is used for sheltering from the fingerprint module is so that the fingerprint module is in display module assembly's front is invisible.

2. The system according to claim 1, wherein the fingerprint module is located in a recessed structure of the backlight module, so that an air gap exists between the backlight module and the display module, wherein the recessed structure of the backlight module is formed in an edge region of the electronic device.

3. The system according to claim 2, wherein the first diffusion film layer covers the recessed structure and the fingerprint module, wherein the haze of visible light of the first diffusion film layer is not less than 70%, and the first diffusion film layer is configured to reform the received light emitted from the backlight module into a light source plane and illuminate the display module.

4. The system according to claim 3, wherein the first diffusion film layer is provided with a fingerprint detection area, and the fingerprint detection area is an area on the first diffusion film layer through which the reflected light passes when the fingerprint module on the first diffusion film layer receives the reflected light generated by the reflection of the fingerprint.

5. The underscreen fingerprint system of claim 4, wherein the infrared haze of the fingerprint detection region is no greater than 20%.

6. The underscreen fingerprint system of claim 5 wherein said first diffusion film layer has diffusion particles distributed thereon.

7. The underscreen fingerprint system of claim 6 wherein said diffusing particles are uniformly distributed on said first diffusion film layer.

8. The underscreen fingerprint system of claim 6 wherein the diffusion particles are distributed progressively in the direction of the first diffusion film layer toward the fingerprint module.

9. The system of claim 8, wherein a distribution density of the diffusion particles on the first diffusion film layer increases gradually along a direction toward an outer edge of the fingerprint module.

10. The underscreen fingerprint system of claim 6, wherein the diffusing particles are fine particles, and the particle size of the fine particles is 0.01um-0.10 um.

11. The underscreen fingerprint system of claim 6 wherein the diffusing particles are infrared transmitting diffusing particles to transmit infrared light having a wavelength of 910nm to 970 nm.

12. The underscreen fingerprint system of claim 6 wherein the diffusion particles are distributed at the surface of the first diffusion film layer or within the first diffusion film layer.

13. The system according to claim 2, wherein the backlight module comprises a module body, the recessed structure is disposed at an end of the module body close to the fingerprint module, and the fingerprint module is disposed in the recessed structure.

14. The underscreen fingerprint system of claim 13 wherein the recessed features are sunken recessed features formed in the module body.

15. The underscreen fingerprint system of claim 14 wherein the module body comprises a first horizontal segment, an angled segment and a second horizontal segment, the angled segment being located between the first horizontal segment and the second horizontal segment, the angled segment and the second horizontal segment forming the sunken structure in the module body.

16. The underscreen fingerprint system of claim 15 wherein the first diffusion film layer is an orthographic projection area of the oblique segment and the second horizontal segment on the first diffusion film layer.

17. The underscreen fingerprint system of claim 15 or 16 wherein, when diffusion particles are progressively distributed on the first diffusion film layer, the distribution density of the diffusion particles on the first diffusion film layer in regions corresponding to the inclined segments is less than the distribution density of the diffusion particles on the first diffusion film layer in regions corresponding to the second horizontal segments.

18. The system according to claim 1, wherein a side of the first diffusion film layer away from the fingerprint module extends along a horizontal direction of the display module or the backlight module until the side is flush with an end of the display module or the backlight module.

19. The system of claim 18, wherein the extension of the first diffusion film layer is located between the display module and the backlight module.

20. The system according to claim 18 or 19, wherein the backlight module has a uniformity of display brightness greater than 85% after passing through the first diffusion film layer and the extended section of the first diffusion film layer.

21. The underscreen fingerprint system of claim 6 wherein the first diffusion film layer comprises a diffusion substrate and the diffusion particles are distributed on the diffusion substrate.

22. The underscreen fingerprint system of claim 21 wherein the diffusing particles and the diffusion substrate are of a unitary construction.

23. An optical fingerprint display module, characterized in that, optical fingerprint display module includes backlight unit, display module assembly and according to the fingerprint system under the screen of any one of claims 1-22, fingerprint system includes the fingerprint module assembly under the screen, the fingerprint module assembly is established backlight unit with between the display module assembly, just the fingerprint module assembly is established on backlight unit's sunk structure, the fingerprint module assembly with be equipped with first diffusion rete between the display module assembly.

24. The optical fingerprint display module of claim 23, wherein the first diffusion film layer covers the concave structure and the fingerprint module, wherein the visible haze of the first diffusion film layer is not less than 70%, and the first diffusion film layer is configured to reform a light source plane after receiving the emergent light from the backlight module and illuminate the display module.

25. The optical fingerprint display module of claim 23, wherein the backlight module comprises a module body, the module body is provided with the recessed structure at an end close to the fingerprint module, and the fingerprint module is located in the recessed structure.

26. The optical fingerprint display module of claim 25 wherein the module body comprises a light guide plate and a non-light-conducting plate structure, the non-light-conducting plate structure comprises a prism film layer, a second diffusion film layer, a reflective film layer and a steel plate, the second diffusion film layer and the prism film layer are sequentially stacked on one side of the light guide plate close to the first diffusion film, and the reflective film layer and the steel plate are sequentially stacked on the opposite side of the light guide plate from the first diffusion film.

27. The optical fingerprint display module of claim 26 wherein the fingerprint module is located between the prism film and the first diffuser film.

28. An electronic device, characterized in that the electronic device comprises the optical fingerprint display module according to any one of the claims 23 to 27.

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