CN109858465A - Display device for fingerprint recognition - Google Patents
Display device for fingerprint recognition Download PDFInfo
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- CN109858465A CN109858465A CN201910146891.4A CN201910146891A CN109858465A CN 109858465 A CN109858465 A CN 109858465A CN 201910146891 A CN201910146891 A CN 201910146891A CN 109858465 A CN109858465 A CN 109858465A
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Abstract
The present invention provides a kind of display device for fingerprint recognition, including display panel and fingerprint mould group, and luminescence unit, main light shield layer and at least one layer of auxiliary light shield layer are provided in display panel；The light direction of luminescence unit deviates from fingerprint mould group, main light shield layer and auxiliary light shield layer are folded along light direction interval to be set, at least one principal light transmission hole is offered on main light shield layer, at least one auxiliary loophole is offered on auxiliary light shield layer, towards fingerprint mould group, the light-path of the fingerprint mould group with preset field of view angle is collectively formed in principal light transmission hole and auxiliary loophole for principal light transmission hole and the light transmission direction of auxiliary loophole.The present invention can form fingerprint image that is clear and not overlapping with each other in fingerprint mould group, improve the precision and accuracy of fingerprint recognition.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of display devices for fingerprint recognition.
Background technique
Fingerprint identification technology, which refers to, under shielding acquires display screen front by the fingerprint identification device that the display screen back side is arranged in
Fingerprint, since the back side of display screen is arranged in fingerprint identification device, can be saved aobvious with completing the technology of fingerprint recognition
The positive display area of display screen improves user experience.
Under current screen in fingerprint identification technology, fingerprint identification device is usually arranged in the back side of display screen, and aobvious
Multiple apertures for light transmission are opened up in display screen, fingerprint identification device can receive the light of aperture transmission.When user's finger connects
When touching display screen, the light of fingerprint reflection can pass through multiple apertures, using the principle of pinhole imaging system in fingerprint identification device
Position forms fingerprint image, after fingerprint identification device obtains the fingerprint image, analyzes by image graphics and completes fingerprint recognition mistake
Journey.
However under existing screen on the display screen of fingerprint recognition, the fingerprint image of multiple keyhole formations usually can be in fingerprint recognition
The position of device occurs to overlap, and causes the precision of fingerprint recognition and accuracy lower.
Summary of the invention
In order to solve the problems, such as that at least one mentioned in background technique, the present invention provide a kind of display for fingerprint recognition
Device can form fingerprint image that is clear and not overlapping with each other in fingerprint mould group, improve the precision of fingerprint recognition and accurate
Degree.
To achieve the goals above, provided by the present invention for the display device of fingerprint recognition, including display panel and refer to
Line mould group is provided with luminescence unit, main light shield layer and at least one layer of auxiliary light shield layer in display panel.
The light direction of luminescence unit is folded along light direction interval away from fingerprint mould group, main light shield layer and auxiliary light shield layer and is set,
Offer at least one principal light transmission hole on main light shield layer, offer at least one auxiliary loophole on auxiliary light shield layer, principal light transmission hole and
The finger with preset field of view angle is collectively formed towards fingerprint mould group, principal light transmission hole and auxiliary loophole in the light transmission direction of auxiliary loophole
The light-path of line mould group.
Provided by the present invention for the display device of fingerprint recognition, by the way that luminescence unit, main screening are arranged in display panel
Photosphere and auxiliary light shield layer generate transmitting light using the light irradiation fingerprint of luminescence unit, while utilizing the master on main light shield layer
Auxiliary loophole on loophole and auxiliary light shield layer enables fingerprint reflection light to can smoothly enter into fingerprint mould group, realizes fingerprint mould
Group is normal to obtain information in fingerprint.By the way that main light shield layer and auxiliary light shield layer are set along light direction interval is folded, and by principal light transmission
Hole and the light transmission direction of auxiliary loophole are towards fingerprint mould group, to limit fingerprint mould group light using principal light transmission hole and auxiliary loophole
The field angle of access.By adjusting main light shield layer, auxiliary light shield layer, principal light transmission hole and auxiliary loophole relevant parameter, so as to adjust
The specific value of field angle, so that the fingerprint image formed in fingerprint mould group avoids clearly and not there is a phenomenon where mutually overlapping
The crosstalk of information in fingerprint reduces information in fingerprint and extracts difficulty, to improve the precision and accuracy of fingerprint recognition.
In the above-mentioned display device for fingerprint recognition, optionally, the glazed area in principal light transmission hole is less than auxiliary
The glazed area of unthreaded hole.
By the way that the glazed area in principal light transmission hole to be set smaller than to the glazed area of auxiliary loophole, principal light transmission hole can use
The light-path of fingerprint mould group and the preset field of view angle of light-path are limited jointly with auxiliary loophole, to avoid in display module
Fingerprint image there is a phenomenon where overlapping.
In the above-mentioned display device for fingerprint recognition, optionally, auxiliary light shield layer is located at main light shield layer close to finger
The side of line mould group and/or the side of separate fingerprint mould group.
By the way that one of main light shield layer close to the side of fingerprint mould group and/or far from fingerprint mould group is arranged in auxiliary light shield layer
Auxiliary light shield layer is arranged according to the space requirement in display panel convenient for user in side, to improve the spirit of auxiliary light shield layer position setting
Activity and convenience.
In the above-mentioned display device for fingerprint recognition, optionally, the central axis in principal light transmission hole and auxiliary light transmission
The central axis in hole is located at same straight line.
By being arranged the central axis of principal light transmission hole and auxiliary loophole on same straight line, principal light transmission hole can reduce
With the setting difficulty of auxiliary loophole, and fingerprint reflection light is avoided to reflect in principal light transmission hole and auxiliary loophole, thus
Guarantee that fingerprint reflection light can smoothly enter into fingerprint mould group.
In the above-mentioned display device for fingerprint recognition, optionally, on main light shield layer in arranged in matrix have it is multiple
, there are multiple auxiliary loopholes in principal light transmission hole in arranged in matrix on auxiliary light shield layer, and multiple principal light transmission holes and multiple auxiliary loopholes one are a pair of
It should be arranged.
It is multiple by the way that principal light transmission hole and auxiliary loophole to be disposed as and multiple principal light transmission holes and auxiliary loophole one are a pair of
It should be arranged, to improve the light-inletting quantity of fingerprint mould group using multiple principal light transmission holes and auxiliary loophole, and be formed in fingerprint mould group
Multiple fingerprint images form complete fingerprint image after multiple fingerprint image splicings, carry out finger print information knowledge convenient for fingerprint mould group
Not.
In the above-mentioned display device for fingerprint recognition, it optionally, in display panel is provided with multiple auxiliary shadings
Layer, multiple auxiliary light shield layers are along the folded ipsilateral or heteropleural for being located at main light shield layer in light direction interval.
By the way that multiple auxiliary light shield layers are arranged in display panel, main light shield layer is assisted simultaneously using multiple auxiliary light shield layers, from
And the light-path of fingerprint mould group is preferably limited, the precision for being formed by the preset field of view angle of light-path is improved, to effectively keep away
Exempt from the image in fingerprint mould group to occur to overlap.
In the above-mentioned display device for fingerprint recognition, optionally, the preset field of view angle of fingerprint mould group is 80-90
Degree.
Above-mentioned preset field angle can be avoided the fingerprint that multiple principal light transmission holes and auxiliary loophole are formed in fingerprint mould group
Image occurs to overlap, and multiple fingerprint images can carry out splicing to form complete fingerprint image, be convenient for fingerprint mould group
Carry out fingerprint recognition.
In the above-mentioned display device for fingerprint recognition, optionally, the shape in principal light transmission hole and auxiliary loophole
Shape is identical.
It is identical by the way that principal light transmission hole and auxiliary loophole to be shaped to, it can be to avoid fingerprint reflection light in principal light transmission
It is blocked or reflects in hole and auxiliary loophole, to guarantee that fingerprint reflection light can smoothly enter into fingerprint mould group, while can be with
Reduce the difficulty of processing of main light shield layer and auxiliary light shield layer.
In the above-mentioned display device for fingerprint recognition, optionally, main light shield layer and auxiliary light shield layer are aluminium layer, titanium
One of layer and molybdenum layer or a variety of composite layers.
In the above-mentioned display device for fingerprint recognition, optionally, main light shield layer and auxiliary light shield layer with a thickness of
5-10nm。
The thickness of above-mentioned main light shield layer and auxiliary light shield layer can guarantee the position energy for not opening up principal light transmission hole and auxiliary loophole
Enough effectively blocking fingerprint reflection light enters fingerprint mould group, thus guarantee the process that pinhole imaging system can be completed in display panel,
Guarantee to form fingerprint image on fingerprint module.
Construction and its other goals of the invention and beneficial effect of the invention will be in conjunction with the accompanying drawings to preferred reality
Apply the description of example and more obvious and easy to understand.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to make simply to introduce, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram for the display device for fingerprint recognition that the embodiment of the present invention one provides；
Fig. 2 is the structural representation of the main light shield layer for the display device for fingerprint recognition that the embodiment of the present invention one provides
Figure；
Fig. 3 is the structural representation of the auxiliary light shield layer for the display device for fingerprint recognition that the embodiment of the present invention one provides
Figure；
Fig. 4 is the structural schematic diagram of the light-path for the display device for fingerprint recognition that the embodiment of the present invention one provides；
Fig. 5 is the structural schematic diagram of the light-path of the display device provided by Embodiment 2 of the present invention for fingerprint recognition.
Description of symbols:
10-display panels；
11-luminescence units；
12-main light shield layers；
121-principal light transmission holes；
13-auxiliary light shield layers；
131-auxiliary loopholes；
20-fingerprint mould groups；
α-field angle；
30-fingerprints；
S1-object plane；
S2-is as plane；
L1-object distance；
L2-image distance；
R1-principal light transmission hole aperture；
The aperture of the auxiliary loophole of R2-；
Spacing between the adjacent principal light transmission hole r1-；
Spacing between the adjacent auxiliary loophole of r2-.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the preferred embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or
Similar label indicates same or similar component or component with the same or similar functions.Described embodiment is this hair
Bright a part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to
It is used to explain the present invention, and is not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The embodiment of the present invention is described in detail with reference to the accompanying drawing.
In the description of the embodiment of the present invention, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " connected ", " connection " should broadly understood, for example, can make to be fixedly connected, be also possible to through the indirect phase of intermediary
Even, the connection inside two elements or the interaction relationship of two elements be can be.For the ordinary skill people of this field
For member, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
Embodiment one
Fig. 1 is the structural schematic diagram for the display device for fingerprint recognition that the embodiment of the present invention one provides.Fig. 2 is this hair
The structural schematic diagram of the main light shield layer for the display device for fingerprint recognition that bright embodiment one provides.Fig. 3 is that the present invention is implemented
The structural schematic diagram of the auxiliary light shield layer for the display device for fingerprint recognition that example one provides.Fig. 4 is that the embodiment of the present invention one mentions
The structural schematic diagram of the light-path of the display device for fingerprint recognition supplied.
The present inventor has found during practical study, under current screen in fingerprint identification technology, usually will
The back side of display screen is arranged in fingerprint identification device, and multiple apertures for light transmission, fingerprint identification device are opened up in display screen
It is oppositely arranged with light transmission aperture, and can receive the light of the transmission in light transmission aperture.In fingerprint identification process, user
When finger touches display screen, the fingerprint meeting reflection light of finger, the reflection light can enter display screen by light transmission aperture
In the fingerprint identification device of lower section.Fingerprint based on people is the convex uneven streakline generated of the positive surface skin fovea superior of finger tips, tool
There are unchangeable property and a uniqueness, therefore light is radiated at that the incident angle on fingerprint is different, the light of fingerprint reflection is bright
Difference will be secretly generated, different colours can be presented in fingerprint depressed section and protrusion part respectively or different gray scales, the fingerprint are anti-
Penetrate after light received by fingerprint identification device, by fingerprint equipment algorithm process at multi-grayscale fingerprint image, by with it is pre-stored
Fingerprint image compare, thus to the fingerprint realize identification purpose.
However multiple light transmission apertures are provided in current display screen, each light transmission aperture can be on fingerprint identification device
Part fingerprint image is formed, when the imaging optical path of multiple light transmission apertures is mutually overlapping, then will lead to shape on fingerprint identification device
At fingerprint image it is mutually overlapping, cause fingerprint identification device that can not clearly obtain the fingerprint image of various pieces, increase finger
The workload of identification and the analysis of print image identification device, and reduce the precision and accuracy of its identification.
And, the embodiment of the present invention provides following solution: referring to Fig.1 based on above-mentioned discovery
To shown in Fig. 4, the embodiment of the present invention provides a kind of display device for fingerprint recognition, including display panel 10 and fingerprint mould group
20, luminescence unit 11, main light shield layer 12 and at least one layer of auxiliary light shield layer 13 are provided in display panel 10.
The light direction of luminescence unit 11 deviates from fingerprint mould group 20, and main light shield layer 12 and auxiliary light shield layer 13 are between light direction
It is set every folded, at least one principal light transmission hole 121 is offered on main light shield layer 12, at least one auxiliary light transmission is offered on auxiliary light shield layer 13
The light transmission direction of hole 131, principal light transmission hole 121 and auxiliary loophole 131 is towards fingerprint mould group 20, principal light transmission hole 121 and auxiliary light transmission
The light-path of the fingerprint mould group 20 with preset field of view angle is collectively formed in hole 131.
It should be noted that display panel 10 provided in this embodiment can be Organic Light Emitting Diode (Organic
Light-Emitting Diode, OLED) display panel 10, which can successively fold the substrate that sets along preset direction
Substrate, tft layer, anode layer, organic luminous layer, metal cathode layer and encapsulated layer.In above-mentioned display panel 10
Hole transmission layer, the structure sheafs such as hole injection layer, electron transfer layer and electron injecting layer, this implementation can also be set as needed
Example to this and it is without restriction, user can according to need setting.The organic luminous layer of the display panel 10 be located at anode layer and
Between cathode layer, and shine in the case where the two forms electric field driven effect.Wherein, each layer of display panel 10 provided in this embodiment
Flexible material can also be selected as needed, to be prepared as flexible display panels.
Side in the display device positioned at display panel 10 is provided with fingerprint mould group 20, and generally fingerprint mould group 20 is position
In the inside of display device, the i.e. side of the separate light-emitting surface of display panel 10, or when in use far from the side of user.Ginseng
According to shown in Fig. 1, the lower section of display panel 10 is arranged in fingerprint mould group 20 by the present embodiment, and the top of display panel 10 is close to use
Finger tips can be placed on the upper position of the display panel 10 when carrying out fingerprint recognition by the light-emitting surface of family side, user
It sets.It should be pointed out that the present embodiment Fig. 1 provides only a kind of achievable structure of display panel 10,20 He of fingerprint mould group
The light-emitting surface of display panel 10 is located at the opposite sides of display panel 10.In actual use, if when display panel 10
When light-emitting surface is located below, relatively fingerprint mould group 20 can be disposed over.
Fingerprint mould group 20 provided in this embodiment can have fingerprint image acquisition, finger print information analysis and finger print information ratio
Reciprocity function, in actual use, user, which can according to need, selects currently used fingerprint identification device, and the present embodiment is to finger
The specific internal structure of line mould group 20 is simultaneously without restriction.
Shown in referring to Fig.1, luminescence unit 11 be can be including anode layer, film in display panel 10 provided in this embodiment
Structure including transistor layer, organic luminous layer and cathode layer.The light direction of luminescence unit 11 goes out towards display panel 10
Smooth surface, and deviate from 20 direction of fingerprint mould group.
It is additionally provided with main light shield layer 12 in display panel 10, referring to shown in Fig. 2, offers at least one on main light shield layer 12
Principal light transmission hole 121, the light transmission direction in the principal light transmission hole 121 is towards fingerprint mould group 20, when carrying out fingerprint recognition, the finger of user
Be placed on the designated position of display screen, the light that luminescence unit 11 issues is radiated on fingerprint 30, fingerprint reflection light again into
Enter in display panel 10, when by main light shield layer 12, the position of fingerprint mould group 20, fingerprint mould are reached by principal light transmission hole 121
Group 20 obtains fingerprint reflection light, and identifies the information in fingerprint wherein carried, determines that fingerprint 30 is after image analysis
No is pre-stored fingerprint, to complete the identification and identification of fingerprint 30.The effect in principal light transmission hole 121 mainly pass through " aperture at
The principle of picture " forms fingerprint image in fingerprint mould group 20.
As a kind of achievable embodiment, referring to shown in Fig. 2, the principal light transmission hole 121 on main light shield layer 12 can be set
It is set to multiple, multiple principal light transmission holes 121 are arranged in array, between the aperture R1 in different principal light transmission holes and adjacent principal light transmission hole
Spacing r1 can be set to it is identical, consequently facilitating the manufacture and assembly of main light shield layer 12.Certainly, the hole in different principal light transmission holes
Spacing r1 between diameter R1 and adjacent principal light transmission hole can also be set as different according to the needs of users, and the present embodiment is to master
The specific value of spacing r1 between the aperture R1 of loophole and adjacent principal light transmission hole is simultaneously without restriction.
When principal light transmission hole 121 is set as multiple, each principal light transmission hole 121 is capable of forming the mistake of realization " pinhole imaging system "
Journey, multiple principal light transmission holes 121 can form fingerprint image on the surface of fingerprint mould group 20, although can increase fingerprint mould group 20
Light-inletting quantity, but be the light for receiving the fingerprint 30 of finger different parts and being reflected based on different principal light transmission holes 121, therefore each
Partial fingerprints image is presented in principal light transmission hole 121, and different principal light transmission holes 121 is formed completely after being formed by fingerprint image splicing
Fingerprint image.However the setting position in current principal light transmission hole 121 and main light shield layer 12 leads to adjacent 121 institute of principal light transmission hole
The partial fingerprints image of formation can overlap, and the fingerprint image for causing different principal light transmission holes 121 to be formed can not splice completely
At complete fingerprint image, and being formed by fingerprint image on 20 surface of fingerprint mould group is also to have part overlapping region, therefore
Increase fingerprint mould group 20 to take the fingerprint the task amount of image effective information, and reduces the recognition accuracy of the fingerprint mould group 20
And precision.
In order to avoid the generation of above situation, the present embodiment increases in display panel 10 is provided with auxiliary light shield layer 13, auxiliary
At least one auxiliary loophole 131 is offered on light shield layer 13.Wherein, referring to shown in Fig. 3, the light transmission direction of auxiliary loophole 131
Towards fingerprint mould group 20, so that fingerprint reflection light can also equally pass through auxiliary loophole 131.Referring to shown in Fig. 4, the present embodiment
The main light shield layer 12 and auxiliary light shield layer 13 provided is to fold to set along light direction interval, the extending direction of the main light shield layer 12 and auxiliary screening
The extending direction of photosphere 13 can be parallel to each other, to reduce the assembly difficulty of the 10 each structure sheaf in inside of display panel, certainly
The extending direction of the main light shield layer 12 and the extending direction of auxiliary light shield layer 13 also can according to need and be set as non-parallel relation, this
Embodiment to this and it is without restriction, be also not limited to shown in attached drawing.
Light transmission direction based on principal light transmission hole 121 and auxiliary loophole 131 towards fingerprint mould group 20, fingerprint reflection light into
After entering display panel 10, it can successively pass through principal light transmission hole 121 and auxiliary loophole 131, wherein mainly be realized at principal light transmission hole 121
The process of " pinhole imaging system ", auxiliary loophole 131 is used to limit the opticpath by principal light transmission hole 121, so as to adjust master is passed through
Hot spot (fingerprint image) size that the fingerprint reflection light of loophole 121 is formed on 20 surface of fingerprint mould group guarantees by adjacent
121 fingerprint reflection light of principal light transmission hole formed partial fingerprints image can be spliced into complete fingerprint image, to prevent
The fingerprint image on 20 surface of fingerprint mould group occurs to overlap, and extracts effective information in fingerprint convenient for fingerprint mould group 20, raising refers to
The precision and accuracy of line preparation.
Correspondingly, multiple auxiliary loopholes 131 also can be set on auxiliary light shield layer 13, referring to shown in Fig. 3, multiple auxiliary light transmissions
Hole 131 is arranged in matrix, and the spacing r2 between the aperture R2 of different auxiliary loophole and adjacent auxiliary loophole can be set to
It is identical, consequently facilitating the manufacture and assembly of auxiliary light shield layer 13.Certainly, the aperture R2 of different auxiliary loophole and adjacent auxiliary light transmission
Spacing r2 between hole can also be set as different according to the needs of users, the present embodiment to the aperture R2 of auxiliary loophole, and
The specific value of spacing r2 between adjacent auxiliary loophole is simultaneously without restriction.
Wherein, main light shield layer 12 and auxiliary light shield layer 13 can be newly added structure sheaf in display panel 10, can also benefit
With structure sheaf original in display panel 10, such as tft layer, duct is opened up in tft layer, to be formed
Main light shield layer 12 or auxiliary light shield layer 13.
As an alternative embodiment, multiple principal light transmission holes 121 and multiple auxiliary loopholes 131 are arranged in a one-to-one correspondence.
The realization process of main " pinhole imaging system " is played based on principal light transmission hole 121, the auxiliary limitation of loophole 131 passes through principal light transmission hole 121
Fingerprint reflection light path, therefore multiple principal light transmission holes 121 and multiple auxiliary loopholes 131 are arranged correspondingly, can
To guarantee that each principal light transmission hole 121 is corresponding with an auxiliary loophole 131, so that each by principal light transmission hole 121
Fingerprint reflection process can be by the limitation of auxiliary loophole 131, so as to effectively avoid the surface shape in fingerprint mould group 20
At overlapping fingerprint image, finger print information identification is carried out convenient for fingerprint mould group 20.
As an alternative embodiment, the glazed area in principal light transmission hole 121 is less than the transparent surface of auxiliary loophole 131
Product.Referring to shown in Fig. 2 and Fig. 3, principal light transmission hole 121 and auxiliary loophole 131 provided by the present embodiment be can be shown in figure
Circular hole also can according to need and be set as square hole, tri-angle-holed or hole in irregular shape.As an alternative embodiment,
The shape in principal light transmission hole 121 is identical with the shape of auxiliary loophole 131.The shape of principal light transmission hole 121 and auxiliary loophole 131 is arranged
To be identical, it can be blocked or reflect in principal light transmission hole 121 and auxiliary loophole 131 to avoid fingerprint reflection light, to protect
Card fingerprint reflection light can smoothly enter into fingerprint mould group 20, while can reduce the difficult processing of main light shield layer 12 and auxiliary light shield layer 13
Degree.
When principal light transmission hole 121 and auxiliary loophole 131 are circular hole, the glazed area in principal light transmission hole 121 can be by main saturating
The aperture R1 of unthreaded hole is defined.Similarly, the glazed area of auxiliary loophole 131 can be limited by the aperture R2 of auxiliary loophole
It is fixed.At this point, the aperture R2 of auxiliary loophole is greater than the aperture R1 in principal light transmission hole.
In fingerprint image forming process, the minimum light spot that fingerprint reflection light is formed is located at the position in principal light transmission hole 121,
Two side spots far from principal light transmission hole 121 gradually increase, and light path is gradually expanded, and light path forms field angle, and (α is shown in Fig. 4
Angle).Referring to shown in Fig. 4, the auxiliary light shield layer 13 in the present embodiment is located at main light shield layer 12 close to the side of fingerprint mould group 20,
Light path based on fingerprint reflection light is gradually increased from main light shield layer 12 to the direction of fingerprint mould group 20, therefore by auxiliary loophole
Aperture R2 be set greater than the aperture R1 in principal light transmission hole, be not only adapted to the light path being gradually increased, but also can lead to
It crosses the aperture R2 for adjusting auxiliary loophole and is formed by field angle α angle to achieve the purpose that adjust light path, and adjust fingerprint
Reflection light is formed by the purpose of fingerprint image size, finally the surface of fingerprint mould group 20 formed mutually splicing and it is non-overlapping
Fingerprint image.
Fingerprint image based on 20 surface of fingerprint mould group is formed by the principle of " pinhole imaging system ", 20 table of fingerprint mould group
There are following relationships for the area and the area of actual fingerprint 30 for the fingerprint image that face is formed:
Wherein, a is area of the actual fingerprint 30 on object plane S1；A is fingerprint image as area on plane S2；L1 is
The distance of object distance, i.e. object plane S1 to main light shield layer 12；L2 is image distance, i.e., as plane S2 to the distance of main light shield layer 12.
Therefore in actual use, user can according to need the size relation of adjustment object distance L1 and image distance L2, to adjust
The whole size as fingerprint image on plane S2.
Further, the aperture R1 in principal light transmission hole is primarily used to form fingerprint image, therefore when its is excessive, is unfavorable for
Fingerprint reflection light converges here and forms fingerprint image on as plane S2.Spacing r1 between adjacent principal light transmission hole is determined
Whether overlapped in the fingerprint image that 20 surface of fingerprint mould group is formed, when the spacing r1 between the adjacent principal light transmission hole is too small
When, overlapping, the identification difficulty of increase fingerprint mould group 20 occurs for the fingerprint image that adjacent principal light transmission hole 121 is formed, and when this is adjacent
When spacing r1 between principal light transmission hole is excessive, the fingerprint image that adjacent principal light transmission hole 121 is formed not can guarantee complete splicing, still
It is unfavorable to fingerprint recognition, in actual use, user can be adjusted according to the needs principal light transmission hole aperture R1 and adjacent master it is saturating
Spacing r1 between unthreaded hole, to reach in fingerprint mould group 20 as the fingerprint image that forms no overlap and mutually splice on plane S2
Picture improves fingerprint recognition precision and accuracy.
Also, the aperture R2 and the distance between main light shield layer 12 and auxiliary light shield layer 13 of auxiliary loophole determine field angle
The size of α, when the aperture R2 of auxiliary loophole is excessive or when the distance between main light shield layer 12 and auxiliary light shield layer 13 are too small,
Fingerprint reflection light is formed by field angle α increase, and when the aperture R2 of auxiliary loophole is too small or main light shield layer 12 and auxiliary
When the distance between light shield layer 13 is excessive, fingerprint reflection light is formed by field angle α reduction.In actual use, Yong Huke
To adjust aperture R2 and the distance between the main light shield layer 12 and auxiliary light shield layer 13 of auxiliary loophole as needed to guarantee institute
The practical field of view angle α of formation meets preset field of view angle α.
As an alternative embodiment, the preset field of view angle α of fingerprint mould group 20 is 80-90 degree.The present embodiment provides
Preset field of view angle α can to prevent the fingerprint image formed in fingerprint mould group 20 from occurring overlapping, and multiple fingerprint images can be with
Splicing is carried out to form complete fingerprint image, carries out fingerprint recognition convenient for fingerprint mould group 20.In actual use, view is preset
The specific value of rink corner α can according to need to be adjusted in above-mentioned range, the present embodiment to this and it is without restriction.
The spacing r2 between spacing r1 and adjacent auxiliary loophole between adjacent principal light transmission hole can determine principal light transmission hole 121
With the position corresponding relationship of auxiliary loophole 131 in the direction of light transmission.As an alternative embodiment, principal light transmission hole 121
The central axis of central axis and auxiliary loophole 131 is located at same straight line.It should be noted that by adjusting adjacent principal light transmission
The spacing r2 between spacing r1 and adjacent auxiliary loophole between hole, to guarantee that principal light transmission hole 121 and auxiliary loophole 131 are coaxial
On the one hand setting can reduce the setting difficulty of principal light transmission hole 121 and auxiliary loophole 131, improve the preparation effect of display panel 10
Rate；On the other hand, fingerprint reflection light can also be avoided to reflect in principal light transmission hole 121 or auxiliary loophole 131, thus
Guarantee that fingerprint reflection light can smoothly enter into fingerprint mould group 20.
As an alternative embodiment, main light shield layer 12 and auxiliary light shield layer 13 are one in aluminium layer, titanium layer and molybdenum layer
Kind or a variety of composite layers.
Wherein, main light shield layer 12 and auxiliary light shield layer 13 with a thickness of 5-10nm, which can guarantee not open up master
The position of loophole 121 and auxiliary loophole 131 can effectively block fingerprint reflection light and enter fingerprint mould group 20, to guarantee aobvious
Show the process that can complete pinhole imaging system in panel 10, guarantees to form fingerprint image on fingerprint module.And thickness should not be too large,
The aperture difficulty on main light shield layer 12 and auxiliary light shield layer 13 can also be reduced in this way, to improve the preparation effect of display panel 10
Rate.
The display device for fingerprint recognition that the embodiment of the present invention one provides, by the way that the list that shines is arranged in display panel
First, main light shield layer and auxiliary light shield layer generate transmitting light using the light irradiation fingerprint of luminescence unit, while utilizing main light shield layer
On principal light transmission hole and auxiliary light shield layer on auxiliary loophole fingerprint reflection light can smoothly enter into fingerprint mould group, realize
Fingerprint mould group normally obtains information in fingerprint.It is set by folding main light shield layer and auxiliary light shield layer along light direction interval, and will
Principal light transmission hole and the light transmission direction of auxiliary loophole are towards fingerprint mould group, to limit fingerprint using principal light transmission hole and auxiliary loophole
The field angle of mould group light-path.By adjusting main light shield layer, auxiliary light shield layer, principal light transmission hole and auxiliary loophole relevant parameter, from
And the specific value of field angle is adjusted, so that the fingerprint image formed in fingerprint mould group is clear and do not occur mutually to overlap shows
As avoiding the crosstalk of information in fingerprint, reducing information in fingerprint and extract difficulty, to improve the precision and standard of fingerprint recognition
Exactness.
Embodiment two
Fig. 5 is the structural schematic diagram of the light-path of the display device provided by Embodiment 2 of the present invention for fingerprint recognition.
Referring to Figure 5, on the basis of the above embodiment 1, the embodiment of the present invention two also provides the use of another structure
In the display device of fingerprint recognition, embodiment two is in place of the difference of the two compared with embodiment one: auxiliary light shield layer 13 is opposite
It is different in the setting position of main light shield layer 12.
Specifically, auxiliary light shield layer 13 is located at side of the main light shield layer 12 far from fingerprint mould group 20.
It should be noted that when remaining for being provided with display device in the region between main light shield layer 12 and fingerprint mould group 20
When structure, biggish space is occupied, therefore to avoid the setting of auxiliary light shield layer 13 from influencing the internal structure of former display device, it can
Adaptively to adjust the setting position of auxiliary light shield layer 13, it is disposed at side of the main light shield layer 12 far from fingerprint mould group 20, this
The flexibility of 10 structure of display panel can be improved in the set-up mode of sample.
Other technical characteristics are the same as example 1, and can reach identical technical effect, and this is no longer going to repeat them.
Display device provided by Embodiment 2 of the present invention for fingerprint recognition, by the way that the list that shines is arranged in display panel
First, main light shield layer and auxiliary light shield layer generate transmitting light using the light irradiation fingerprint of luminescence unit, while utilizing main light shield layer
On principal light transmission hole and auxiliary light shield layer on auxiliary loophole fingerprint reflection light can smoothly enter into fingerprint mould group, realize
Fingerprint mould group normally obtains information in fingerprint.It is set by folding main light shield layer and auxiliary light shield layer along light direction interval, and will
Principal light transmission hole and the light transmission direction of auxiliary loophole are towards fingerprint mould group, to limit fingerprint using principal light transmission hole and auxiliary loophole
The field angle of mould group light-path.By adjusting main light shield layer, auxiliary light shield layer, principal light transmission hole and auxiliary loophole relevant parameter, from
And the specific value of field angle is adjusted, so that the fingerprint image formed in fingerprint mould group is clear and do not occur mutually to overlap shows
As avoiding the crosstalk of information in fingerprint, reducing information in fingerprint and extract difficulty, to improve the precision and standard of fingerprint recognition
Exactness.
Embodiment three
On the basis of above-described embodiment one and embodiment two, the embodiment of the present invention three also provides being used for for another structure
The display device of fingerprint recognition, embodiment three is compared with embodiment one and embodiment two, and difference place is: auxiliary light shield layer 13
Quantity and setting position relative to main light shield layer 12 are different.
Specifically, being provided with multiple auxiliary light shield layers 13 in display panel 10, multiple auxiliary light shield layers 13 are along light direction interval
The folded ipsilateral or heteropleural for being located at main light shield layer 12.
It should be noted that it is more based on the fingerprint reflection light entered inside display panel 10, and the finger of different parts
The incident angle in display panel 10 of fingerprint reflection light caused by line 30 is also different, therefore, in order to ensure that fingerprint reflects
Light, which is formed by field angle α, can comply fully with the requirement of preset field of view angle α, can be more by being arranged in display panel 10
A auxiliary light shield layer 13 assists main light shield layer 12 simultaneously using multiple auxiliary light shield layers 13, to preferably limit fingerprint mould group 20
Light-path improves the precision for being formed by the preset field of view angle α of light-path, so that the image in fingerprint mould group 20 effectively be avoided to send out
It is raw overlapping.
As optional embodiment, multiple auxiliary light shield layers 13 can be according to the limit of the installation space inside display panel 10
The ipsilateral or heteropleural set in main light shield layer 12 is set up, the influence to avoid auxiliary light shield layer 13 to 10 internal structure of display panel,
Improve the flexibility of 10 structure of display panel.
Other technical characteristics are identical as embodiment one and embodiment two, and can reach identical technical effect, herein no longer
It repeats one by one.
The display device for fingerprint recognition that the embodiment of the present invention three provides, by the way that the list that shines is arranged in display panel
First, main light shield layer and auxiliary light shield layer generate transmitting light using the light irradiation fingerprint of luminescence unit, while utilizing main light shield layer
On principal light transmission hole and auxiliary light shield layer on auxiliary loophole fingerprint reflection light can smoothly enter into fingerprint mould group, realize
Fingerprint mould group normally obtains information in fingerprint.It is set by folding main light shield layer and auxiliary light shield layer along light direction interval, and will
Principal light transmission hole and the light transmission direction of auxiliary loophole are towards fingerprint mould group, to limit fingerprint using principal light transmission hole and auxiliary loophole
The field angle of mould group light-path.By adjusting main light shield layer, auxiliary light shield layer, principal light transmission hole and auxiliary loophole relevant parameter, from
And the specific value of field angle is adjusted, so that the fingerprint image formed in fingerprint mould group is clear and do not occur mutually to overlap shows
As avoiding the crosstalk of information in fingerprint, reducing information in fingerprint and extract difficulty, to improve the precision and standard of fingerprint recognition
Exactness.
In the description of the embodiment of the present invention, it is to be understood that term " on ", "lower", "front", "rear", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" are orientation based on the figure or position
Relationship is merely for convenience of description of the present invention and simplification of the description, rather than indicates or imply that signified device or element must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.In the present invention
Description in, the meaning of " plurality " is two or more, accurately specifically provide unless otherwise.
The description and claims of this application and term " first ", " second ", " third ", " in above-mentioned attached drawing
The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage
The data that solution uses in this way are interchangeable under appropriate circumstances, so that embodiments herein described herein for example can be to remove
Sequence other than those of illustrating or describe herein is implemented.In addition, term " includes " and " having " and theirs is any
Deformation, it is intended that cover it is non-exclusive include, for example, containing the process, method of a series of steps or units, system, production
Product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for this
A little process, methods, the other step or units of product or equipment inherently.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
Technical solution documented by foregoing embodiments can so be studied and be changed, or some or all of the technical features are carried out
Equivalent replacement；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution various embodiments of the present invention technical side
The range of case.
Claims (10)
1. a kind of display device for fingerprint recognition, which is characterized in that including display panel and fingerprint mould group, the display surface
Luminescence unit, main light shield layer and at least one layer of auxiliary light shield layer are provided in plate；
The light direction of the luminescence unit deviates from the fingerprint mould group, and the main light shield layer and the auxiliary light shield layer go out described in
Light direction interval is folded to be set, at least one principal light transmission hole is offered on the main light shield layer, is offered at least on the auxiliary light shield layer
Towards the fingerprint mould group, the master is saturating in the light transmission direction of one auxiliary loophole, the principal light transmission hole and the auxiliary loophole
The light-path of the fingerprint mould group with preset field of view angle is collectively formed in unthreaded hole and the auxiliary loophole.
2. the display device according to claim 1 for fingerprint recognition, which is characterized in that the light transmission in the principal light transmission hole
Area is less than the glazed area of the auxiliary loophole.
3. the display device according to claim 2 for fingerprint recognition, which is characterized in that the auxiliary light shield layer is located at institute
Main light shield layer is stated close to the side of the fingerprint mould group and/or far from the side of the fingerprint mould group.
4. the display device according to any one of claim 1-3 for fingerprint recognition, which is characterized in that the master is saturating
The central axis of the central axis of unthreaded hole and the auxiliary loophole is located at same straight line.
5. the display device according to any one of claim 1-3 for fingerprint recognition, which is characterized in that the main screening
There are multiple principal light transmission holes in arranged in matrix on photosphere, is in that arranged in matrix there are multiple auxiliary loopholes on the auxiliary light shield layer, it is more
A principal light transmission hole and multiple auxiliary loopholes are arranged in a one-to-one correspondence.
6. the display device according to any one of claim 1-3 for fingerprint recognition, which is characterized in that the display
Multiple auxiliary light shield layers are provided in panel, multiple auxiliary light shield layers are folded along the light direction interval and are located at the main light shield layer
Ipsilateral or heteropleural.
7. the display device according to any one of claim 1-3 for fingerprint recognition, which is characterized in that the fingerprint
The preset field of view angle of mould group is 80-90 degree.
8. the display device according to any one of claim 1-3 for fingerprint recognition, which is characterized in that the master is saturating
The shape of unthreaded hole is identical with the shape of auxiliary loophole.
9. the display device according to any one of claim 1-3 for fingerprint recognition, which is characterized in that the main screening
Photosphere and the auxiliary light shield layer are one of aluminium layer, titanium layer and molybdenum layer or a variety of composite layers.
10. the display device according to any one of claim 1-3 for fingerprint recognition, which is characterized in that the master
Light shield layer and the auxiliary light shield layer with a thickness of 5-10nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910146891.4A CN109858465A (en) | 2019-02-27 | 2019-02-27 | Display device for fingerprint recognition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910146891.4A CN109858465A (en) | 2019-02-27 | 2019-02-27 | Display device for fingerprint recognition |
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| CN109858465A true CN109858465A (en) | 2019-06-07 |
Family
ID=66899230
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910146891.4A Pending CN109858465A (en) | 2019-02-27 | 2019-02-27 | Display device for fingerprint recognition |
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| CN (1) | CN109858465A (en) |
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| CN110399797A (en) * | 2019-06-25 | 2019-11-01 | 厦门天马微电子有限公司 | Display panel and display device |
| CN111095285A (en) * | 2019-08-23 | 2020-05-01 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN111328398A (en) * | 2019-08-23 | 2020-06-23 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN111788577A (en) * | 2020-03-03 | 2020-10-16 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device, display screen and electronic equipment |
| CN111970447A (en) * | 2020-08-25 | 2020-11-20 | 云谷（固安）科技有限公司 | Display device and mobile terminal |
| CN112151572A (en) * | 2019-06-28 | 2020-12-29 | 云谷（固安）科技有限公司 | Fingerprint identification display device, preparation method thereof and fingerprint identification display device |
| WO2020259647A1 (en) * | 2019-06-27 | 2020-12-30 | 京东方科技集团股份有限公司 | Subsrate used for display and display device |
| CN112215152A (en) * | 2020-10-13 | 2021-01-12 | 业泓科技(成都)有限公司 | Display device with fingerprint identification module |
| WO2021007964A1 (en) * | 2019-07-12 | 2021-01-21 | 深圳市汇顶科技股份有限公司 | Fingerprint detection apparatus and electronic device |
| US11417143B2 (en) | 2019-08-23 | 2022-08-16 | Shenzhen GOODIX Technology Co., Ltd. | Fingerprint detection apparatus and method and electronic device |
| EP4024269A4 (en) * | 2019-08-30 | 2022-08-31 | BOE Technology Group Co., Ltd. | Texture image acquisition device, display device, and collimation component |
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| CN110399797A (en) * | 2019-06-25 | 2019-11-01 | 厦门天马微电子有限公司 | Display panel and display device |
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| WO2021007964A1 (en) * | 2019-07-12 | 2021-01-21 | 深圳市汇顶科技股份有限公司 | Fingerprint detection apparatus and electronic device |
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| US11417143B2 (en) | 2019-08-23 | 2022-08-16 | Shenzhen GOODIX Technology Co., Ltd. | Fingerprint detection apparatus and method and electronic device |
| CN111095285A (en) * | 2019-08-23 | 2020-05-01 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
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| CN111095285B (en) * | 2019-08-23 | 2021-09-17 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
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| EP4024269A4 (en) * | 2019-08-30 | 2022-08-31 | BOE Technology Group Co., Ltd. | Texture image acquisition device, display device, and collimation component |
| US11804509B2 (en) | 2019-10-18 | 2023-10-31 | Shenzhen GOODIX Technology Co., Ltd. | Fingerprint detection apparatus and electronic device |
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| CN111788577B (en) * | 2020-03-03 | 2024-04-30 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device, display screen and electronic equipment |
| CN111970447A (en) * | 2020-08-25 | 2020-11-20 | 云谷（固安）科技有限公司 | Display device and mobile terminal |
| CN112215152A (en) * | 2020-10-13 | 2021-01-12 | 业泓科技(成都)有限公司 | Display device with fingerprint identification module |
| CN112215152B (en) * | 2020-10-13 | 2023-10-03 | 业泓科技(成都)有限公司 | Display device with fingerprint identification module |
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Application publication date: 20190607 |