CN107239724A - Fingerprint imaging module - Google Patents
Fingerprint imaging module Download PDFInfo
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- CN107239724A CN107239724A CN201610183654.1A CN201610183654A CN107239724A CN 107239724 A CN107239724 A CN 107239724A CN 201610183654 A CN201610183654 A CN 201610183654A CN 107239724 A CN107239724 A CN 107239724A
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- light source
- light
- imaging module
- fingerprint imaging
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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- Human Computer Interaction (AREA)
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- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
A kind of fingerprint imaging module, including：Imaging sensor, including towards the photosurface of finger；Color layers, on photosurface；Light source, positioned at imaging sensor side, between finger and color layers.The present invention by light source by being arranged at imaging sensor side, and positioned between finger and color layers, the incident light for producing light source is directly projected to finger surface, so as to avoid incident light projection color layers, avoid scattering of the color layers to incident light, so as to improve the concentration degree for being projected to finger incident light, increase light intensity of incident light, be conducive to improving the reflected light concentration degree for being projected to imaging sensor, increase reflected light light intensity, so as to be conducive to improving the quality for the fingerprint image that imaging sensor is obtained.
Description
Technical field
The present invention relates to fingerprint imaging field, more particularly to a kind of fingerprint imaging module.
Background technology
Fingerprint identification technology collects the fingerprint image of human body by fingerprint imaging module, then knows with fingerprint
Existing fingerprint imaging information is compared in other system, to realize identification.Due to the convenience used,
And the uniqueness of somatic fingerprint, fingerprint identification technology has been widely used in every field, such as：It is public
The consumer goods such as the field of safety check such as peace office, customs, the gate control system of building, and PC and mobile phone are led
Domain etc..
Fingerprint imaging module employed in fingerprint identification technology, it is to be imaged mould by optical finger print to have one kind
The fingerprint image of group collection human body：Incident light is produced by light source；Incident light is projected to finger top layer, warp
Finger reflects to form the reflected light with finger print information；The reflected light is received by imaging sensor, obtained
Fingerprint image.
When this optical fingerprint imaging modules are applied to mobile phone or other mobile devices, fingerprint imaging mould
Composition just has required, it is necessary to right for a part for equipment appearance to the appearance color of sensor
Fingerprint imaging module carries out colouring processing, to adapt to the appearance design of equipment.But in the prior art through upper
The fingerprint imaging module imaging effect of color processing is not good.
The content of the invention
The problem of present invention is solved is to provide a kind of fingerprint imaging module, to improve imaging effect.
To solve the above problems, the present invention provides a kind of fingerprint imaging module, including：
Imaging sensor, including towards the photosurface of finger；Color layers, on the photosurface；Light
Source, between described image sensor side, finger and the color layers.
Optionally, photosurface described in the color layers covering part；The fingerprint imaging module also includes：
Driving chip, on the surface that the photosurface does not cover the color layers；Laying, positioned at described
Driving chip side, covers the color layer surface；The light source is located at the side of the laying.
Optionally, on the vertical photosurface direction, the size of the laying is more than or equal to described drive
The size of dynamic chip.
Optionally, the material of the laying includes glass or optical cement.
Optionally, the material of the laying is the lining on glass, and the vertical photosurface direction
When the size of bed course is more than or equal to the size of the light source；The laying includes passing towards the fingerprint
First face of sensor and second face relative with first face；The light source be located at first face and
Between first face and second face, the light-emitting area of the light source is towards the laying.
Optionally, the laying is towards end face and the described image sensor of the light source towards the light
The end face in source；Or the end face of the laying towards the light source is located at described image sensor court
To the light source end face and the light source light-emitting area between.
Optionally, in addition to：Touch layer, in the color layers, including towards the touch surface of finger；
The light source is located between the touch surface and the color layers.
Optionally, vertically planar projected to the photosurface, the projection of the touch layer
Cover the projection of described image sensor and the light source；The touch layer also includes and the touch surface phase
To the back side；The fingerprint imaging module also includes：Light trough, positioned at the touch layer back side；The light
Source is located in the light trough, and the light-emitting area of the light source is towards the light trough close to described image sensor one
The side wall of side.
Optionally, in addition to：Driving chip, positioned at the surface of the photosurface；Escape groove, positioned at institute
State the touch layer back side, and be arranged at the driving chip to corresponding position.
Optionally, the color layers are located at described image sensor photosurface surface, and the touch layer is located at
The color layer surface.
Optionally, the light trough and/or the escape groove are carried on the back by way of machining in the touch layer
Face is formed.
Optionally, the angle of the side wall and bottom of the light trough and/or the escape groove be obtuse angle, acute angle or
Right angle.
Optionally, the light source and the driving chip are located at the both sides of the color layers respectively.
Optionally, in addition to flexible PCB, described flexible PCB one end and described image sensor
Photosurface is connected, and is bent to below described image sensor, the one side laminating opposite with the photosurface；
The light source is arranged at the other end of the flexible PCB.
Optionally, the touch layer includes touch-screen.
Compared with prior art, technical scheme has advantages below：
The present invention is located between finger and color layers by the way that light source is arranged at into imaging sensor side,
The incident light for producing light source is directly projected to finger surface, so as to avoid incident light projection color layers,
Scattering of the color layers to incident light is avoided, so as to improve the concentration degree for being projected to finger incident light, is increased
Light intensity of incident light, is conducive to improving the reflected light concentration degree for being projected to imaging sensor, increases reflected light light
By force, be conducive to improving the quality for the fingerprint image that imaging sensor is obtained.And because light source is arranged at hand
Refer between color layers, therefore, it can save the use of light guide plate, simplify the knot of fingerprint imaging module
Structure, reduces the volume of fingerprint imaging module, improves integrated level, reduces manufacturing cost；Reduce finger
The number of assembling steps of line imaging modules, improves packaging efficiency.
In alternative of the present invention, light trough of the opening towards imaging sensor can be set at the touch layer back side,
For placing light source；Light source is located in light trough, and its light-emitting area is towards the light trough close to imaging sensor one
The side wall of side.The incident light that light source is produced is projected into touch layer, and refraction occurs in touch layer or is all-trans
Penetrate.When incident light is projected to the interface of the touch layer and air, when incidence angle is critical less than being totally reflected
The portion of incident light at angle can be projected to finger from the interface outgoing, handle digital reflex formation and carry
The reflected light of finger print information, the reflected light is received by described image sensor and obtains fingerprint image；It is incident
The portion of incident light that angle is more than the cirtical angle of total reflection can continue to propagate in the touch layer, be touched from described
One end outgoing of the layer away from light source, it is to avoid incident light is projected to imaging sensor and interfered, favorably
In improving the signal to noise ratio of imaging sensor acquisition fingerprint image, the quality for obtaining fingerprint image is improved.
In alternative of the present invention, escape groove can also be set at the touch layer back side, for setting driving core
Piece, so as to save the use of laying, can further reduce the thickness of fingerprint imaging module, carry
Its high integrated level, additionally it is possible to reduce cost of goods manufactured.And escape groove and lamp are set at the touch layer back side
The step of groove, can be carried out simultaneously, therefore can simplify the manufacturing process of manufacture fingerprint imaging module, be reduced
Assembling procedure.
Brief description of the drawings
Fig. 1 is a kind of cross section structure diagram of optical fingerprint imaging modules；
Fig. 2 is the cross-sectional view of the embodiment of fingerprint imaging module one of the present invention；
Fig. 3 is the cross-sectional view of another embodiment of fingerprint imaging module of the present invention；
Fig. 4 is the cross-sectional view of fingerprint imaging module another embodiment of the present invention.
Embodiment
From background technology, there is imaging effect in the fingerprint imaging module in the prior art through colouring processing
Not good the problem of.In conjunction with the original of the not good problem of its imaging effect of the structural analysis of the fingerprint imaging module
Cause：
With reference to Fig. 1, a kind of cross section structure diagram of optical fingerprint imaging modules is shown.
When the finger 10 of people is pressed against on touch layer 11, the light that light source 12 is sent by light guide plate 13 formed into
Penetrate light 14.Incident light 14 through after imaging sensor 15 and touch layer 11 to projecting the top layer of finger 10.Through
Finger reflects to form reflected light 16, the reflected light 16 is received by imaging sensor 15, to the reflected light
The fingerprint image of finger is obtained after 16 processing.
In order that the appearance color of fingerprint imaging module adapts to the appearance design of equipment, in the prior art in figure
The upper chromatograph 17 of certain color is presented as being formed between sensor 15 and touch layer 11, make the fingerprint into
As module has certain appearance color.
Backlight, that is, light source 12 are used in optical fingerprint imaging modules of the prior art
In the side of the light guide plate 13, the light guide plate 13 is located at the lower section of described image sensor 15.Cause
This described incident ray 14 be projected to the surface of finger 10 need to transmit successively described image sensor 15,
The upper chromatograph 17 and the touch layer 11.
Described image sensor 15, the upper chromatograph 17 and the touch layer 11 can be to being projected to
The intensity for stating the incident light 14 of finger 10 is impacted.Particularly upper chromatograph 17.Upper chromatograph 17 leads to
It is often the film layer in the film layer or silk-screen printing technique formation ink layer of coating process formation, upper chromatograph 17
Grain or ink particle have stronger scattering process to incident light 14, and the angle of incident light 14 can be caused to send out
Dissipate, a large amount of incident lights 14 can not be projected to the formation reflected light 16 of finger 10, so as to cause the light of reflected light 16
Strong to reduce, influence described image sensor 15 receives the quality for the fingerprint image that reflected light 16 is obtained.
In addition, when upper chromatograph 17 is high reflection color (such as white or silver color), a large amount of incident lights 14
The reflected light projects formed by the reflection of upper chromatograph 17 to described image sensor 15 can also be to described
The reception of 15 pairs of the imaging sensor reflected light 16 is interfered, also being made to fingerprint image
Into influence.Therefore in the prior art, it is poor to there is image quality in this fingerprint imaging module through colouring processing
The problem of.
To solve the technical problem, the present invention provides a kind of fingerprint imaging module, including：
Imaging sensor, including towards the photosurface of finger；Color layers, on the photosurface；Light
Source, between described image sensor side, finger and the color layers.
The present invention is located between finger and color layers by the way that light source is arranged at into imaging sensor side,
The incident light for producing light source is directly projected to finger surface, so as to avoid incident light projection color layers,
Scattering of the color layers to incident light is avoided, so as to improve the concentration degree for being projected to finger incident light, is increased
Light intensity of incident light, is conducive to improving the reflected light concentration degree for being projected to imaging sensor, increases reflected light light
By force, be conducive to improving the quality for the fingerprint image that imaging sensor is obtained.And because light source is arranged at hand
Refer between color layers, therefore, it can save the use of light guide plate, simplify the knot of fingerprint imaging module
Structure, reduces the volume of fingerprint imaging module, improves integrated level, reduces manufacturing cost；Reduce finger
The number of assembling steps of line imaging modules, improves packaging efficiency.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings
The specific embodiment of the present invention is described in detail.
With reference to Fig. 2, the cross-sectional view of the embodiment of fingerprint imaging module one of the present invention is shown.
The fingerprint imaging module includes：Imaging sensor 110, the one side towards the finger 100 is sense
Smooth surface 111；Color layers 120, on the photosurface 111；And light source 130, positioned at the figure
As between the side of sensor 110, finger 100 and the color layers 120.
The light source 130 is located between finger 100 and color layers 120, can make what light source 130 was produced
Incident light is directly projected to the surface of finger 100, it is to avoid color layers 120 described in incident light transmission.Incident light without
The color layers 120 need to be transmitted, the scattering of 120 pairs of incident lights of color layers can be avoided, effectively
Increase be projected to the concentration degree of the incident light of finger 100, increase light intensity of incident light, so as to increase warp
The finger 100 reflects the concentration degree for forming reflected light, increases reflected light light intensity.Due to the reflection
Light carries finger print information, therefore the present invention can effectively improve described image sensor 110 according to described
The quality for the fingerprint image that reflected light is obtained.
In addition, the light source 130 is arranged at into doing between the finger 100 and the color layers 120
Method, can save the use of light guide plate in the prior art, simplify the structure of fingerprint imaging module, and reduction refers to
The volume of line imaging modules, improves integrated level, reduces manufacturing cost.And save the use of light guide plate
The number of assembling steps of fingerprint imaging module can also be reduced, packaging efficiency is improved.
Below in conjunction with the accompanying drawings, the structure of the fingerprint imaging module is described in detail.
As shown in Fig. 2 the fingerprint imaging module includes：Imaging sensor 110.
Described image sensor 110 is used for the fingerprint image for obtaining finger 100.Described image sensor 110
It is photosurface 111 towards the face of the finger 100.When carrying out fingerprint recognition, the table of finger 100 is projected to
The incident light in face, the reflected light for carrying finger print information is reflected to form through finger 100, and the reflected light is thrown
The photosurface 111 of described image sensor 110 is incident upon, described image sensor 110 is according to the reflected light
Obtain fingerprint image.
Color layers 120 on the photosurface 111, for the appearance to described image sensor 110
Painted.
Fingerprint imaging module is widely used in the various electronic equipments such as mobile phone, tablet personal computer, in order to coordinate
The appearance design of electronic equipment, the fingerprint imaging module needs to present certain appearance color, it is described on
Chromatograph 120 is used to carry out outward appearance colouring to described image sensor 110.
The color layers 120 are located on the photosurface 111 of described image sensor 110.Specifically, can be with
Ink is coated on by formation color layers 120 on the photosurface 111 by screen printing technique, can also be led to
The mode for crossing the film depositions such as physical vapour deposition (PVD) forms color layers 120 on the photosurface 111.
Between the side of described image sensor 120, the finger 100 and the color layers 120
Light source 130, for producing incident light.
The incident light that the light source 130 is produced, is projected to the finger 100, is reflected through the finger 100
The reflected light for carrying finger print information is formed, described image sensor 110 gathers the reflected light, obtained
Fingerprint image.Specifically, in the present embodiment, the light source 130 is light emitting diode, it is described to reduce
The volume of fingerprint imaging module, reduces the energy consumption of the fingerprint imaging module.
The light source 130 be located at described image sensor 110 side, and positioned at the finger 100 with
Between the color layers 120.The incident light that light source 130 is produced, can directly be projected to the table of finger 100
Face, without transmiting the color layers 120, therefore, it is possible to avoid radiating of the color layers 120 to incident light,
The concentration degree of incident light is effectively raised, increases light intensity of incident light, improves through the reflection of finger 100
Into reflected light concentration degree, reflected light light intensity is increased, so as to effectively improve described image sensor 110
The quality of the fingerprint image obtained.
In the present embodiment, the fingerprint imaging module also includes：Touch layer 140, positioned at the color layers
On 120, including towards the touch surface 141 of the finger.The light source 130 is located at the touch surface 141
Between the color layers 120.
Specifically, the touch layer 140 is used to be touched by the finger 100.When finger 100 is touched
During the touch surface 141 of the touch layer 140, the incident light that the light source 130 is produced is projected to the hand
Refer to the contact position of 100 and the touch surface 141, occur reflection and reflect, obtained so as to improve
Fingerprint image quality.
The light source 130 is located between the touch surface 141 and the color layers 120.Specifically, this
In embodiment, the light source 130 is located at side of the touch layer 140 away from the finger 100, and
Positioned at the color layers 120 close to the side of the finger 100.So entering of producing of the light source 130
The contact position of the finger 100 and the touch surface 141 can be directly projected to by penetrating light, without transmiting
State color layers 120.
Specifically, the touch layer 140 can be touch-screen.The fingerprint imaging module can be positioned at
Concealed structure below the touch-screen, so as to avoid forming through hole on the touch-screen, simplification is set
Standby structure, reduces manufacturing cost.But during this way is only an example, other embodiments of the invention,
The touch layer can also be other film layers in electronic equipment.
It should be noted that in the present embodiment, photosurface 111 described in the covering part of color layers 120.
Further, the fingerprint imaging module also includes：Driving chip 150, does not cover positioned at the photosurface 111
On the surface for covering the color layers 111；And positioned at the side of driving chip 150 and cover the face
The laying 160 of chromatograph；The light source 130 is located at the side of the laying 160.
The driving chip 150 is used to drive described image sensor 110 to obtain fingerprint image.It is described to drive
The region that dynamic chip 150 is located on the photosurface, do not covered by the color layers 120.
In the present embodiment, along along the vertical direction of photosurface 111, the size of the laying 160 is big
In or equal to the driving chip 150 size.So the laying 160 is in the photosurface 111
Surface forms gap, to set the driving chip 150.
Specifically, photosurface 111 described in the covering part of color layers 120, the laying 160 is covered
The surface of color layers 120, the laminating of touch layer 140 and the surface of laying 160.The sense
In smooth surface 111, a gap is formed between described image sensor 110 and the touch layer 140.It is described to drive
Dynamic chip 150 is located in the gap, on the photosurface 111 of described image sensor 110.Specifically,
The material of the laying 160 includes glass or optical cement (Optically Clear Adhesive, OCA).
It should be noted that in the present embodiment, the color layers 120 are formed at described image sensor 110
The surface of photosurface 111.But this way is only an example.It is described in other embodiments of the invention
Color layers 120 can also be formed at the laying 120 towards in the one side of described image sensor 110.
In addition, in the present embodiment, the material of the laying 160 is glass, and the vertically photosurface
On 111 directions, the size of the laying 160 is more than or equal to the size of the light source 130.The lining
Bed course 160 is included towards the first face of described image sensor 110 and relative with first face the
Two faces.The light source 130 is located between first face and the second face, and the hair of the light source 130
Smooth surface is towards the laying 160.
Specifically, in the present embodiment, the laying 160 is located at color layers 120 and the touch layer 140
Between.So along along the vertical direction of photosurface 111, the light source 130 and the laying 160
Flush, also be located between color layers 120 and the touch layer 140.
In addition, the end face of the laying 160 towards the light source 130 is located at described image sensor 110
Towards the light source 130 end face and the light source 130 light-emitting area between so that the laying
160 are completely covered the photosurface, it is to avoid the incident light that the light source 130 is produced directly is projected to the sense
Smooth surface 111 and interfere.But during this way is only an example, other embodiments of the invention,
The laying can be made towards end face and the described image sensor of the light source towards the end of the light source
Face is flushed.
It should be noted that in the present embodiment, the fingerprint imaging module also includes flexible PCB 170,
Connection for realizing the fingerprint imaging module and external circuit.One end of the flexible PCB 170
It is connected with the photosurface 111, and is bent to the lower section of described image sensor 110, with the photosurface
111 opposite one side laminatings；The light source 130 is located at the other end of the flexible PCB 170.
Compared with prior art, the setting of light guide plate is eliminated, the flexible PCB 170 is directly and institute
The one side laminating opposite with the photosurface 111 of imaging sensor 110 is stated, the fingerprint imaging mould is simplified
The structure of group, reduces the volume of the fingerprint imaging module, improves integrated level, reduces manufacturing cost；
The number of assembling steps of the fingerprint imaging module is reduced, packaging efficiency is improved.
In addition, in the present embodiment, the light source 130 is respectively arranged at described with the driving chip 150
The both sides of color layers, it is to avoid interfering between the light source 130 and the driving chip 150,
It it also avoid that the inside conductor of flexible PCB 170 is excessively intensive, advantageously reduce the fingerprint imaging module
Noise, improves image quality.
With reference to Fig. 3, the cross-sectional view of another embodiment of fingerprint imaging module of the present invention is shown.
The something in common of the present embodiment and previous embodiment is repeated no more, the present embodiment and previous embodiment
Difference is, light trough is provided with the touch layer 240.
Specifically, as shown in figure 3, in the present embodiment, vertically to described image sensor 210
Photosurface 211 planar project, the projection of the touch layer 240 covering described image sensor
210 and the projection of the light source 230.That is, described image biography is completely covered in the touch layer 240
Sensor 210 and the light source 230.
The touch layer 240 also includes the back side 242 relative with the touch surface 241.The fingerprint imaging
Module also includes：Light trough 280 positioned at the back side of touch layer 240.The light source 230 is located at the lamp
In groove 280, the light-emitting area of the light source 230 is towards the light trough 280 close to described image sensor one
The side wall of side.
In the present embodiment, the touch layer 240 is the touch-screen of electronic equipment.Therefore institute's touch layer 240
It is substrate of glass close to the part of the back side 242.When the light source 230 be located at the light trough 280 in,
And the light-emitting area of the light source 230 towards the light trough 280 close to the side of described image sensor 210
During the wall of side, the incident light that the light source 230 is produced is projected into the substrate of glass of the touch-screen,
Refraction occurs in the substrate of glass or is totally reflected.
Therefore after incident light enters touch layer 240, the interface of touch layer 240 and air is projected to,
The portion of incident light that incidence angle is less than the cirtical angle of total reflection can be projected to finger from the outgoing of touch surface 241,
The reflected light for carrying finger print information is reflected to form through finger surface, the reflected light is sensed by described image
Device 210 is received, to obtain fingerprint image；The portion of incident light that incidence angle is more than the cirtical angle of total reflection can be
Continue to propagate in the touch layer 240, from one end outgoing of the light source 230 of touch layer 240, it is to avoid
Incident light is projected to imaging sensor and forms interference.
Therefore the light source 230 is arranged to the way in the light trough 280, it is possible to increase the light source
230 produce the utilization rate of incident light, while the incident angle of light for being projected to the finger 200 is more concentrated, it is accurate
It is straightforward more preferable, be conducive to improving the quality for the fingerprint image that the fingerprint image sensor 210 is obtained.
The side wall of light trough 280 and the angle of bottom can be obtuse angle, acute angle or right angle.That is,
The vertical photosurface, along along the plane of the light direction of propagation, the section of the light trough 280 to be square or
Wedge shape.Specifically, can by way of machining in the back side 242 of the touch layer 240 shape
Into the light trough 280.The generation type of the light trough 280 to it is similar in the prior art, the present invention is herein not
Repeat again.
With reference to Fig. 4, the cross-sectional view of fingerprint imaging module another embodiment of the present invention is shown.
The difference of the present embodiment and previous embodiment is, in the present embodiment, the touch layer 340
The back side 342 on be additionally provided with escape groove 390 for setting driving chip 350.
The escape groove 390 is located at the back side 342 of touch layer 340, and is arranged at and the driving chip
350 corresponding positions.Specifically, the shape of the escape groove 390 can also be square or wedge shape, can
To be formed by way of machining at the back side 342 of the touch layer 340.
In addition, by the setting of the escape groove 390, the touch layer 340 and described image sensor
Between 310 there is enough spaces to place the driving chip 350.Therefore the use of laying can be saved.
Therefore in the present embodiment, the color layers 320 are located at the table of photosurface 311 of described image sensor 310
Face, the touch layer 340 directly covers the surface of the color layers 320.
The use of the laying is saved, can further reduce the thickness of the fingerprint imaging module, carry
Its high integrated level, additionally it is possible to reduce cost of goods manufactured.And setting is kept away at the back side of touch layer 340
Allow groove 390 and light trough 330 the step of can be while carry out, therefore the manufacture fingerprint imaging can be simplified
The manufacturing process of module, reduces assembling procedure.
It should be noted that in order to which the touch layer 340 is preferably fitted with the color layers 320,
In the present embodiment, the escape groove 390 is additionally operable to avoid the flexible PCB and described image sensor
310 junction.
To sum up, the present invention by light source by being arranged at imaging sensor side, and is located at finger and color layers
Between, the incident light that light source is produced directly is projected to finger surface, so as to avoid incident light projection
Color layers, it is to avoid scattering of the color layers to incident light, so as to improve the concentration for being projected to finger incident light
Degree, increases light intensity of incident light, is conducive to improving the reflected light concentration degree for being projected to imaging sensor, increases
Reflected light light intensity, is conducive to improving the quality for the fingerprint image that imaging sensor is obtained.And due to light source
It is arranged between finger and color layers, therefore, it can save the use of light guide plate, simplify fingerprint imaging
The structure of module, reduces the volume of fingerprint imaging module, improves integrated level, reduces manufacturing cost；
The number of assembling steps of fingerprint imaging module is reduced, packaging efficiency is improved.In addition, alternative of the present invention
In, light trough of the opening towards imaging sensor can be set at the touch layer back side, for placing light source；Light
Source be located at light trough in, its light-emitting area towards the light trough close to imaging sensor side side wall.Light source is produced
Raw incident light is projected into touch layer, and refraction occurs in touch layer or is totally reflected.When incident light projection
To the touch layer and air interface when, when incidence angle is less than the portions incident luminous energy of the cirtical angle of total reflection
It is enough to be projected to finger from the interface outgoing, the reflected light that digital reflex formation carries finger print information is handled,
The reflected light is received by described image sensor and obtains fingerprint image；Incidence angle is more than the cirtical angle of total reflection
Portion of incident light can continue in the touch layer propagate, from the touch layer, one away from light source brings out
Penetrate, it is to avoid incident light is projected to imaging sensor and interfered, be conducive to improving imaging sensor and obtain
The signal to noise ratio of fingerprint image is obtained, the quality for obtaining fingerprint image is improved.Further, optional side of the invention
In case, escape groove can also be set at the touch layer back side, for setting driving chip, so as to save
The use of laying, can further reduce the thickness of fingerprint imaging module, improve its integrated level, moreover it is possible to
Enough reduce cost of goods manufactured.And can be simultaneously the step of the touch layer back side sets escape groove and light trough
Carry out, therefore the manufacturing process of manufacture fingerprint imaging module can be simplified, reduce assembling procedure.
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art,
Without departing from the spirit and scope of the present invention, it can make various changes or modifications, therefore the guarantor of the present invention
Shield scope should be defined by claim limited range.
Claims (15)
1. a kind of fingerprint imaging module, it is characterised in that including：
Imaging sensor, including towards the photosurface of finger；
Color layers, on the photosurface；
Light source, between described image sensor side, finger and the color layers.
2. fingerprint imaging module as claimed in claim 1, it is characterised in that the color layers covering part institute
State photosurface；The fingerprint imaging module also includes：
Driving chip, on the surface that the photosurface does not cover the color layers；
Laying, positioned at the driving chip side, covers the color layer surface；
The light source is located at the side of the laying.
3. fingerprint imaging module as claimed in claim 2, it is characterised in that on the vertical photosurface direction,
The size of the laying is more than or equal to the size of the driving chip.
4. fingerprint imaging module as claimed in claim 2, it is characterised in that the material of the laying includes
Glass or optical cement.
5. fingerprint imaging module as claimed in claim 4, it is characterised in that the material of the laying is glass
On glass, and the vertical photosurface direction, the size of the laying is more than or equal to the light source
During size；
The laying is included towards the first face of the fingerprint sensor and relative with first face
Second face；
The light source is located between first face and first face and second face, the light source
Light-emitting area is towards the laying.
6. fingerprint imaging module as claimed in claim 5, it is characterised in that the laying is towards the light
End face of the end face and described image sensor in source towards the light source；
Or the end face of the laying towards the light source is located at described image sensor towards the light source
End face and the light source light-emitting area between.
7. fingerprint imaging module as claimed in claim 1, it is characterised in that also include：Touch layer, is located at
In the color layers, including towards the touch surface of finger；The light source be located at the touch surface with it is described
Between color layers.
8. fingerprint imaging module as claimed in claim 7, it is characterised in that vertically to described photosensitive
Face is planar projected, the projection covering described image sensor of the touch layer and the light source
Projection；The touch layer also includes the back side relative with the touch surface；
The fingerprint imaging module also includes：Light trough, positioned at the touch layer back side；
The light source is located in the light trough, and the light-emitting area of the light source is towards the light trough close to the figure
As the side wall of sensor side.
9. fingerprint imaging module as claimed in claim 8, it is characterised in that also include：
Driving chip, positioned at the surface of the photosurface；
Escape groove, positioned at the touch layer back side, and is arranged at the driving chip to corresponding position.
10. fingerprint imaging module as claimed in claim 9, it is characterised in that the color layers are located at the figure
As sensor photosensitive face surface, the touch layer is located at the color layer surface.
11. fingerprint imaging module as claimed in claim 9, it is characterised in that the light trough and/or the avoidance
Groove is formed by way of machining at the touch layer back side.
12. fingerprint imaging module as claimed in claim 9, it is characterised in that the light trough and/or the avoidance
The side wall of groove and the angle of bottom are obtuse angle, acute angle or right angle.
13. the fingerprint imaging module as described in claim 2 or 9, it is characterised in that the light source and the drive
Dynamic chip is located at the both sides of the color layers respectively.
14. fingerprint imaging module as claimed in claim 7, it is characterised in that the touch layer includes touch-screen.
15. fingerprint imaging module as claimed in claim 1, it is characterised in that also including flexible PCB, institute
State flexible PCB one end with the photosurface of described image sensor to be connected, and be bent to described image biography
Below sensor, the one side laminating opposite with the photosurface；The light source is arranged at the flexible circuit
The other end of plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610183654.1A CN107239724B (en) | 2016-03-28 | 2016-03-28 | Fingerprint imaging module |
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| CN201610183654.1A CN107239724B (en) | 2016-03-28 | 2016-03-28 | Fingerprint imaging module |
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| CN107239724A true CN107239724A (en) | 2017-10-10 |
| CN107239724B CN107239724B (en) | 2020-07-28 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109074488A (en) * | 2018-07-04 | 2018-12-21 | 深圳市汇顶科技股份有限公司 | Fingerprint mould group and electronic equipment |
| CN110399861A (en) * | 2019-08-02 | 2019-11-01 | 京东方科技集团股份有限公司 | A kind of lines sensor, display device |
| CN110457978A (en) * | 2018-05-08 | 2019-11-15 | 上海箩箕技术有限公司 | Fingerprint imaging mould group and forming method thereof, fingerprint imaging mould group motherboard, electronic equipment |
| CN110502071A (en) * | 2019-07-26 | 2019-11-26 | 维沃移动通信有限公司 | Screen assembly and terminal device |
| CN111095287A (en) * | 2019-08-08 | 2020-05-01 | 深圳市汇顶科技股份有限公司 | Optical fingerprint device and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103793691A (en) * | 2014-01-28 | 2014-05-14 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and mobile terminal with same |
| CN104217198A (en) * | 2014-08-26 | 2014-12-17 | 南昌欧菲生物识别技术有限公司 | Fingerprint identifying device and terminal apparatus |
| CN105116968A (en) * | 2015-09-16 | 2015-12-02 | 上海箩箕技术有限公司 | Electronic equipment with fingerprint identification function |
| CN105184248A (en) * | 2015-08-28 | 2015-12-23 | 京东方科技集团股份有限公司 | Fingerprint identification device and fingerprint identification system |
-
2016
- 2016-03-28 CN CN201610183654.1A patent/CN107239724B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103793691A (en) * | 2014-01-28 | 2014-05-14 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and mobile terminal with same |
| CN104217198A (en) * | 2014-08-26 | 2014-12-17 | 南昌欧菲生物识别技术有限公司 | Fingerprint identifying device and terminal apparatus |
| CN105184248A (en) * | 2015-08-28 | 2015-12-23 | 京东方科技集团股份有限公司 | Fingerprint identification device and fingerprint identification system |
| CN105116968A (en) * | 2015-09-16 | 2015-12-02 | 上海箩箕技术有限公司 | Electronic equipment with fingerprint identification function |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110457978A (en) * | 2018-05-08 | 2019-11-15 | 上海箩箕技术有限公司 | Fingerprint imaging mould group and forming method thereof, fingerprint imaging mould group motherboard, electronic equipment |
| CN110457978B (en) * | 2018-05-08 | 2022-03-22 | 上海箩箕技术有限公司 | Fingerprint imaging module and forming method thereof, fingerprint imaging module motherboard and electronic equipment |
| CN109074488A (en) * | 2018-07-04 | 2018-12-21 | 深圳市汇顶科技股份有限公司 | Fingerprint mould group and electronic equipment |
| CN110502071A (en) * | 2019-07-26 | 2019-11-26 | 维沃移动通信有限公司 | Screen assembly and terminal device |
| CN110399861A (en) * | 2019-08-02 | 2019-11-01 | 京东方科技集团股份有限公司 | A kind of lines sensor, display device |
| CN111095287A (en) * | 2019-08-08 | 2020-05-01 | 深圳市汇顶科技股份有限公司 | Optical fingerprint device and electronic equipment |
| CN111095287B (en) * | 2019-08-08 | 2023-09-12 | 深圳市汇顶科技股份有限公司 | Optical fingerprint device and electronic equipment |
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| CN107239724B (en) | 2020-07-28 |
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