CN108629258A - Fingerprint imaging module and electronic equipment - Google Patents
Fingerprint imaging module and electronic equipment Download PDFInfo
- Publication number
- CN108629258A CN108629258A CN201710185947.8A CN201710185947A CN108629258A CN 108629258 A CN108629258 A CN 108629258A CN 201710185947 A CN201710185947 A CN 201710185947A CN 108629258 A CN108629258 A CN 108629258A
- Authority
- CN
- China
- Prior art keywords
- light
- imaging module
- fingerprint imaging
- fingerprint
- conducting piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (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 and electronic equipment, the fingerprint imaging module include：Linear light source, for generating incident light；Sensing face, the incident light form the reflected light for carrying finger print information in the sensing face；Imaging sensor, for acquiring the reflected light to form fingerprint image；In the sensing face, the projection of the projection nucleus of the linear light source around described image sensor.Technical solution of the present invention can effectively improve the light intensity uniformity of incident light, the problem of improving fingerprint image amplification, advantageously reduce read false rate, be conducive to overcome the problems, such as fingerprint image deformation and caused by algorithm perplex.
Description
Technical field
The present invention relates to fingerprint imaging field, more particularly to a kind of fingerprint imaging module and electronic equipment.
Background technology
Fingerprint recognition is that will have fingerprint letter in fingerprint image and fingerprint recognition system after acquiring somatic fingerprint image
Breath is compared, to realize identification.Due to the use of convenience and somatic fingerprint uniqueness, fingerprint identification technology
It has been widely used in every field, such as：The field of safety check such as public security bureau, customs, the access control system and PC of building
With the consumer product areas such as mobile phone etc..
In fingerprint imaging technique used by fingerprint recognition, one is optically acquire somatic fingerprint image：It is logical
It crosses light source and generates incident light；Incident light is projected to finger surface layer, handles digital reflex and forms the reflected light with finger print information；By scheming
As sensor receives the reflected light, acquisition fingerprint image.
But the fingerprint image that is obtained of fingerprint imaging module in the prior art the problem of being susceptible to deformation.
Invention content
Problems solved by the invention is to provide a kind of fingerprint imaging module and electronic equipment, is asked with improving fingerprint image deformation
Topic.
To solve the above problems, the present invention provides a kind of fingerprint imaging module, including：
Linear light source, for generating incident light；Sensing face, the incident light is formed in the sensing face carries fingerprint letter
The reflected light of breath；Imaging sensor, for acquiring the reflected light to form fingerprint image；In the sensing face, the line
Projection of the projection nucleus of light source around described image sensor.
Optionally, described image sensor has photosensitive area；In the sensing face, the linear light source projection nucleus is around described
Photosensitive area projects half cycle or more.
Optionally, in the sensing face, the photosensitive area is projected as centrosymmetric image；The linear light source projection is at least
Part is centrosymmetric with photosensitive area projection symmetrical centre.
Optionally, the linear light source includes：Illuminating part, for generating initial light；Conducting piece is connected with the illuminating part,
For conducting the initial light to form the incident light, in the sensing face, the conducting piece projection is along around the figure
The direction projected as sensor extends.
Optionally, the illuminating part is light emitting diode.
Optionally, the conducting piece is flexible light-conducting body.
Optionally, the conducting piece is entirely lighting optical fiber.
Optionally, the entirely lighting optical fiber is liquid core entirely lighting optical fiber or solid core entirely lighting optical fiber.
Optionally, the conducting piece has along the opposite first end and second end of extending direction；The illuminating part with it is described
First end is connected at least one end in the second end.
Optionally, the linear light source further includes：Connector, between the illuminating part and the conducting piece.
Optionally, one end is connected with the connector in the first end and the second end；The connector has phase
Carry on the back the first joint face and the second joint face of setting；First joint face is opposite with the light-emitting surface of the illuminating part to be bonded；Institute
State the fitting opposite with the conducting piece first end or the end face of second end of the second joint face.
Optionally, the fingerprint imaging module further includes：Shading piece, be located at the illuminating part and described image sensor it
Between.
Optionally, the first end and the second end are connected with the connector；The connector has to be set opposite to each other
The side of the first joint face and the second joint face and connection first joint face and second joint face set；Described
The fitting opposite with the end face of conducting piece first end of one joint face, the end of second joint face and the conducting piece second end
Face is opposite to be bonded；The side and the light-emitting surface of the illuminating part fit.
Optionally, the fingerprint imaging module further includes：Shading piece, be located at the connector and described image sensor it
Between.
Optionally, the shading piece also extends between at least partly described conducting piece and described image sensor.
Optionally, the material of the shading piece is metal or ink.
Optionally, the material of the connector is UV glue.
Correspondingly, the present invention also provides a kind of electronic equipment, including：The fingerprint imaging module of the present invention.
Compared with prior art, technical scheme of the present invention has the following advantages：
The linear light source light extraction high stability, equalization of intensity is higher, therefore the use of the linear light source can
The uniformity of incident light produced by effectively improving, so as to effectively improve the light intensity for being projected to incident light in the sensing face
Uniformity is conducive to the fingerprint image for obtaining high quality；And in the sensing face, the projection nucleus of the linear light source is around described
The projection of imaging sensor, therefore the incident light can be emitted from described image sensor surrounding different location, so institute's shape
At reflected light projects to described image sensor on when, can be complementary to one another, to reach improve reflected light in small angular light
The purpose of line ingredient advantageously reduces read false rate, is conducive to that fingerprint image is overcome to deform to improve the problem of fingerprint image amplifies
Algorithm caused by and perplexs problem.
In other embodiments of the invention, in the sensing face, the linear light source projection nucleus is around photosensitive area projection half
It is more than week；And in the sensing face, the photosensitive area is projected as centrosymmetric image；So the part linear light that is centrosymmetric
The incident light that source generates, it is opposite to be emitted, therefore the incident light is formed by reflected light and can be complementary to one another, so as to effective
Reduction fingerprint image magnification level, be conducive to improve fingerprint image amplification the problem of, be conducive to the reduction of read false rate.
In other embodiments of the invention, the linear light source may include illuminating part and conducting piece；Wherein, the illuminating part can
Think that light emitting diode, the conducting piece can be whole body light, such as entirely lighting optical fiber.So technical solution of the present invention
It can be formed by integrating the illuminating part and the conducting piece on the basis of existing fingerprint imaging module, therefore technique is grasped
The property made is strong, and process costs are relatively low, is manufactured it is not necessary that the larger change of existing producing line progress can be completed, additional without increasing
Process costs.
In alternative of the present invention, the fingerprint imaging module further includes：It is sensed positioned at the linear light source and described image
Shading piece between device prevents too strong incident light to be directly projected to described image sensor and cause to interfere, and can effectively press down
The noise of described image sensor processed is conducive to the signal-to-noise ratio for improving the fingerprint imaging module.
Description of the drawings
Fig. 1 is a kind of cross-sectional view of fingerprint imaging module；
Fig. 2 is the overlooking structure diagram of one embodiment of fingerprint imaging module of the present invention；
Fig. 3 be in embodiment illustrated in fig. 2 the first illumination region 122a and the second illumination region 122b in fingerprint image acquisition
Light path schematic diagram；
Fig. 4 is the overlooking structure diagram of fingerprint imaging module second embodiment of the present invention；
Fig. 5 is the overlooking structure diagram of fingerprint imaging module 3rd embodiment of the present invention.
Specific implementation mode
By background technology it is found that fingerprint imaging module in the prior art is susceptible to deformation in the presence of obtained fingerprint image
The problem of.The reason of its fingerprint image deformation problems being analyzed in conjunction with a kind of cross-sectional view of fingerprint imaging module：
With reference to figure 1, a kind of cross-sectional view of fingerprint imaging module is shown.
As shown in Figure 1, the fingerprint imaging module includes：Light source 12, for generating incident light；Sensing face 11, it is described enter
It penetrates light and forms the reflected light for carrying finger print information in the sensing face 11；Imaging sensor 13, for acquiring the reflection
Light, and the optical signal of the reflected light is converted into electric signal, to obtain fingerprint image.
In order to reduce the volume of fingerprint imaging module, the light source 12 is often light emitting diode, that is to say, that the light
Source 12 is point light source, therefore the incident light that the light source 12 generates has certain angle of divergence, so being formed by reflected light
There is certain angle of divergence accordingly.
As shown in Figure 1, when finger 10 is pressed into sensing face 11, the incident light is projected in the sensing face 11
Range has the first distance d1；And the range of formed reflected light projects to described image sensor 13 has second distance d2.
Since incident light and reflected light all have certain angle of divergence, second distance d2 is more than the first distance d1, that is to say, that acquisition institute
It states the fingerprint image that reflected light is obtained and will appear a degree of amplification, amplification ratio compared with 10 fingerprint surface of real finger
Example is d2/d1.
When applied to portable electronic devices such as mobile phones, as shown in Figure 1, usually the light source 12 is set to described image
The fingerprint imaging module is improved to reach the thickness and volume that reduce the fingerprint imaging module in the side of sensor 13
Integrated level effect.
But light source 12 is set to the way of 13 side of described image sensor, it can make to be projected in the sensing face 11
The incident angle of incident light becomes larger, and increases so as to cause the ingredient of high angle scattered light in 13 acquired reflected light of described image sensor
It is more, to cause obtained fingerprint image a degree of amplification occur.
And with the increase of distance between acquisition reflection optical position and light source 12, the light path of incident light and the reflected light
It can extend therewith, to cause the incident angle of incident light and reflected light also to increase therewith, therefore in the dipped beam by close to sources 12
The distance light end at end and separate light source 12, the magnification ratio of 13 obtained fingerprint image of described image sensor simultaneously differ：Dipped beam
Hold the magnification ratio of fingerprint image smaller, the magnification ratio of distance light end fingerprint image is larger, so the fingerprint image finally obtained
It will appear more serious amplification phenomenon, to easily cause the problem on deformation of fingerprint image, be likely to result in None- identified and refer to
The algorithm of print image perplexs problem.
To solve the technical problem, the present invention provides a kind of fingerprint imaging module, by using linear light source, and will be described
Linear light source improves the uniformity coefficient of incident light, to reach improvement fingerprint image around the way of described image sensor setting
The purpose of scale-up problem.
To make the above purposes, features and advantages of the invention more obvious and understandable, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
With reference to figure 2, the overlooking structure diagram of one embodiment of fingerprint imaging module of the present invention is shown.
The fingerprint imaging module includes：
Linear light source 110, for generating incident light；Sensing face (not shown), the incident light is in the sensing face
Form the reflected light for carrying finger print information；Imaging sensor 130, for acquiring the reflected light to form fingerprint image；
In the sensing face, the projection of the projection nucleus of the linear light source 110 around described image sensor 130.
110 light extraction high stability of the linear light source, equalization of intensity is higher, therefore the linear light source 110 is adopted
The uniformity of incident light, incident light in the sensing face is projected to so as to effectively improve produced by it can effectively improve
Light intensity uniformity, be conducive to obtain high quality fingerprint image；And in the sensing face, the throwing of the linear light source 110
Shadow surround the projection of described image sensor 130, therefore the incident light can be from 130 surrounding difference position of described image sensor
Outgoing is set, so when being formed by reflected light projects to described image sensor 130, can be complementary to one another, be carried to reach
The purpose of the medium and small angle light component of high reflection light advantageously reduces read false rate, favorably to improve the problem of fingerprint image amplifies
In overcome the problems, such as fingerprint image deformation and caused by algorithm perplex.
The linear light source 110 refers to light source of the size in one direction much larger than its vertical size.So the linear light
Incident light caused by source 110, towards the lateral outgoing of the linear light source 110.Wherein the linear light source 110 it is lateral with it is described
The extending direction of linear light source 110 is perpendicular.
For receiving touch, the incident light is projected in the sensing face sensing face, and reflection and refraction, shape occurs
At the reflected light for carrying finger print information；Described image sensor 130 is for acquiring the reflected light, and by the reflected light
Optical signal is converted to electric signal to obtain fingerprint image.
In the present embodiment, the fingerprint imaging module has the cover sheet of covering described image sensor 130 (in figure not
Show), the cover sheet is the sensing face backwards to the surface of described image sensor 130.
In the sensing face, the projection nucleus of the linear light source 110 around described image sensor 130 projection, so institute
It states incident light produced by linear light source 110 and is projected to institute from 130 surrounding of described image sensor towards the outgoing of the sensing face
It states in sensing face.
As shown in Fig. 2, described image sensor 130 has photosensitive area 120；In the sensing face, the linear light source 110
Projection nucleus is projected around the photosensitive area 120.In the present embodiment, in the sensing face, 110 projection nucleus of the linear light source is around described
Photosensitive area 120 projects one week.So the incident light can be emitted from the surrounding of the photosensitive area 120, to reach improve into
Penetrate the effect of light light intensity uniformity.
In the sensing face, the photosensitive area 120 is projected as centrosymmetric image；The linear light source 110 projects at least
Part projects symmetrical centre with the photosensitive area 120 and is centrosymmetric.Specifically, in the present embodiment, the figure line optical sensor
130 photosensitive area 120 is rectangular；During the linear light source 110 is at least partly in wrong center with the rectangular photosensitive area 120 projection
The heart is symmetrical.
In the present embodiment, the linear light source 110 surround the photosensitive area 120 1 weeks, i.e., the described linear light source 110 is around described
Photosensitive area 120 constitutes the annular of approximate closure, therefore incident light caused by side position is occurring instead for the linear light source 110
The reflected light formed after penetrating can be complementary to one another, achieve the purpose that improve reflected light in small angle light component, can effectively with
The problem of improving fingerprint image amplification, advantageously reduce read false rate, be conducive to overcome fingerprint image deform and caused by algorithm it is tired
Disturb problem.
It should be noted that wherein linear light source 110 refers to the position being centrosymmetric with the symmetrical centre 121 to side position
It sets, such as first illumination region 122a and the second illumination region 122b is described to side position in linear light source 110 in Fig. 2.
With reference to figure 3, show that the first illumination region 122a and the second illumination region 122b are in fingerprint image in embodiment illustrated in fig. 2
Light path schematic diagram when acquisition.
When finger pressing is in the sensing face 150, the first incident light caused by the first illumination region 122a
The incident angle that 123ai is projected to the sensing face 150 is smaller, i.e., the described first incident light 123ai is low-angle incident light, institute
The incident angle that the first reflected light 123ar formed is projected on 130 photosensitive area 120 of described image sensor is also smaller, and
The first reflected light 123ar is projected to the position in described image sensor 130 at a distance from the first illumination region 122a
It is relatively close；Second incident light 124ai caused by the first illumination region 122a be projected to the incident angle of the sensing face 150 compared with
Greatly, i.e., the described second incident light 124ai is large angle incidence light, is formed by the second reflected light 124ar and is projected to described image
Incident angle on 130 photosensitive area 120 of sensor is also smaller, and the second reflected light 124ar is projected to described image biography
Position on sensor 130 at a distance from the first illumination region 122a farther out.
Similar, third incident light 123bi is projected to the sensing face 150 caused by the second illumination region 122b
Incident angle is smaller, i.e., the described third incident light 123bi is low-angle incident light, is formed by the 123br projections of third reflected light
Incident angle on to 130 photosensitive area 120 of described image sensor is also smaller, and the third reflected light 123br is projected to
Position in described image sensor 130 is closer at a distance from the second illumination region 122b；Second illumination region 122b institutes
The incident angle that the 4th incident light 124bi generated is projected to the sensing face 150 is larger, i.e., the described 4th incident light 124bi
For large angle incidence light, it is formed by the 4th reflected light 124br and is projected to entering on 130 photosensitive area 120 of described image sensor
Firing angle degree is also larger, and the 4th reflected light 124br is projected to the position and described second in described image sensor 130
The distance of illumination region 122b is farther out.
Since the first illumination region 122a and the second illumination region 122b is described to side position, so far from described first
The position of illumination region 122a, then close to the second illumination region 122b；Position far from the second illumination region 122b, then it is close
The first illumination region 122a.
So 130 photosensitive area 120 of imaging sensor far from the first illumination region 122a can not only acquire wide-angle
The second reflected light 124ar, additionally it is possible to acquire the third reflected light 123br of low-angle；Far from the second illumination region 122b
130 photosensitive area 120 of imaging sensor can not only acquire the 4th reflected light 124br of wide-angle, additionally it is possible to acquire low-angle
First reflected light 123ar.That is, compared with the technical solution that light source is only set in imaging sensor side, linear light source institute
Incident light is generated, the reflected light formed in the sensing face 150 can be complementary to one another, so as to effectively improve fingerprint image
The problem of amplification of picture, is conducive to the deformation for correcting fingerprint image, is conducive to the reduction of read false rate.
Specifically, with continued reference to Fig. 2, the linear light source 110 includes：Illuminating part 111, for generating initial light；Conducting piece
112, it is connected with the illuminating part 111, for conducting the initial light to form the incident light, in the sensing face, institute
The projection of conducting piece 112 is stated along around the direction that described image sensor 130 projects to extend.
The illuminating part 111 itself can shine, for generating initial light.In the present embodiment, the illuminating part 111 can be with
For light emitting diode.
Initial light caused by the illuminating part 111 can be visible light, or black light.Specifically, described
Initial light can be the face such as black light, purple light, blue light, green light, sodium yellow, red light, near infrared light or white light
Color.
The conducting piece 112 forms the incident light for conducting the initial light.Only due to the conducting piece 112
The initial light is conducted, the frequency of the initial light is had no effect on, so the color of the incident light and the initial light color
It is identical.
Specifically, the conducting piece 112 can be flexible light-conducting body, so in the sensing face, the conducting piece 112
Projection can with the variation of 130 projection of shape of described image sensor side.As shown in Fig. 2, in the present embodiment, in the sense
In survey face, the shape that described image sensor 130 projects is rectangular, so the conducting piece 112 surrounds square region.
In other embodiments of the invention, the shape of described image sensor projection can also be round or oblong etc. other
Shape.When described image sensor is projected as the other shapes such as round or oblong, the conducting piece surrounds round or oval
The suitable region such as shape.
Specifically, the conducting piece 112 is entirely lighting optical fiber.The entirely lighting optical fiber also referred to as surveys light optical fiber, usually
For step index polymer optical fiber, have that soft, energy saving, service life is long, the advantages such as applied widely.The entirely lighting optical fiber
Most significant feature is exactly entirely lighting.Light is propagated in the entirely lighting optical fiber, and along entirely lighting optical fiber extension side
To homogenous diffusion, to which the effect of entirely lighting be presented.
And the loss that light is propagated in entirely lighting optical fiber is smaller, therefore using entirely lighting optical fiber as the biography
Guiding element 112 can effectively control the energy loss that the initial light is propagated in the conducting piece 112, be conducive to raising and formed
The light intensity of incident light reduces the energy consumption of the fingerprint imaging module.
In the present embodiment, the entirely lighting optical fiber is liquid core entirely lighting optical fiber.Using liquid core entirely lighting light
Fine way has flexibility good, the substantially homogeneous advantage of brightness, can effectively improve the fingerprint imaging module yield and
Imaging effect.So the core material of the entirely lighting optical fiber is the liquid such as silicone oil.
But in other embodiments of the invention, the entirely lighting optical fiber may be solid core entirely lighting optical fiber.Gu
The core material of state core entirely lighting optical fiber is mainly quartz, multicomponent glass or polymer.Due to solid core entirely lighting optical fiber
Have many advantages, such as that manufacturing process is simple, it being capable of on-site cutting.Therefore using the way of solid core entirely lighting optical fiber, can pass through
The mode of conventional images sensor integration linear light source forms fingerprint imaging module of the present invention, and process operability is strong, process costs are low
It is honest and clean, it is manufactured it is not necessary that the larger change of existing producing line progress can be completed, without increase additional technology cost.
The conducting piece 112 has along extending direction opposite first end 112a and second end 112b, the illuminating part 111
It is connected at least one end in the first end 112a and the second end 112b.
As shown in Fig. 2, in the present embodiment, the illuminating part 111 is connected with the first end 112a of the conducting piece 112.This
In invention other embodiment, the illuminating part can also be connected with the second end of the conducting piece；Or the illuminating part also may be used
To be connected with the first end and second end of the conducting piece.
The linear light source 110 further includes connector 113, between the illuminating part 111 and the conducting piece 112.
The connector 113 is for realizing being fixedly connected between the conducting piece 112 and the illuminating part 111；In addition
The connector 113 is additionally operable to conduct the initial light, and initial light as much as possible is made to be projected in the conducting piece 112, warp
The conducting piece 112 conducts, and to improve the utilization rate of the initial light, reduces energy consumption.
As shown in Fig. 2, in the present embodiment, one end and the connector in the first end 112a and the second end 112b
113 are connected；The connector 113 has the first joint face and the second joint face being disposed opposite to each other；The first of the connector 113
Joint face fitting opposite with the light-emitting surface of the illuminating part 111, therefore the initial light goes out from the light-emitting surface of the illuminating part 111
It after penetrating, can directly be projected in the connector 113, the conduction in the connector 113；The second of the connector 113
Joint face fitting opposite with the end face of the conducting piece 112, therefore the initial light conducted through the connector 113 can directly be thrown
It is incident upon in the conducting piece 112, to form incident light.
So that the connector 113 is contacted connected way with the conducting piece 112, the illuminating part 111, can avoid
Gap is formed between the connector 113 and the conducting piece 112, the illuminating part 111, to reduce initial light from the hair
Light part 111 is conducive to the utilization rate for improving the initial light to the propagation loss of the conducting piece 112.
In the present embodiment, the material of the connector 113 is UV glue.UV glue is also known as light-sensitive emulsion, is in a kind of photoelectric device
Common adhesive can effectively ensure that the intensity being fixedly connected between the illuminating part 111 and the conducting piece 112；And
And the refractive index of UV glue and the refractive index of 112 common used material of the conducting piece are relatively, therefore can effectively be dropped using UV glue
Loss of the low initial light on 112 interface of the connector 113 and the conducting piece is conducive to the utilization for improving initial light
Rate.
It should be noted that in the present embodiment, the fingerprint imaging module further includes：Shading piece 140 is located at described shine
Between part 111 and described image sensor 130, and extend at least partly described conducting piece 112 and described image sensor 130
Between.
The shading piece 140 is for preventing the initial light and the incident light to be directly projected to described image sensor
Acquisition of the described image sensor 130 to reflected light is interfered on 130.The setting of the light shield layer 140 can be reflected or be inhaled
Stray light is received, is directly acquired by described image sensor 130 to reduce the initial light and the incident light, it can be effective
The noise that described image sensor 130 acquires optical signal is controlled, the signal-to-noise ratio for improving the fingerprint imaging module is conducive to.
In the present embodiment, the material of the shading piece 140 is ink (such as dark or metallochrome ink), can be passed through
The mode of silk-screen is formed between the illuminating part 111 and described image sensor 130.Dark ink has light higher
Absorptivity, and the ink of metallochrome has higher reflectivity to light, therefore set the material of the shading piece 140 to oil
The way of ink has simple for process, low-cost advantage.In other embodiments of the invention, the material of the shading piece may be used also
Think metal, such as silver, aluminium etc..The shading piece of metal material has higher reflectivity to light, can also play shielding light
The effect of line.
Form incident light as the initial light is propagated in the conducting piece 112, the light intensity of the initial light and
The light intensity of formed incident light gradually decays.In the present embodiment, the conducting piece 112 is entirely lighting optical fiber, entirely lighting
The entirely lighting intensity of optical fiber exponentially declines with the increase of fiber lengths.
So along 112 extending direction of the conducting piece, it is generated with the illuminating part 111 apart from closer position
The light intensity of incident light is bigger；With the illuminating part 111 apart from remoter position, the light intensity of produced incident light is smaller.So institute
It states shading piece 140 to be not only located between the illuminating part 111 and described image sensor 130, also extend at least partly described
Between conducting piece 112 and described image sensor 130.
It should be noted that in the present embodiment, connection is additionally provided between the illuminating part 111 and the conducting piece 112
Part 113, so the shading piece 140 is also located between the connector 113 and described image sensor 130.
With reference to figure 4, the overlooking structure diagram of fingerprint imaging module second embodiment of the present invention is shown.
The present embodiment and previous embodiment something in common, details are not described herein by the present invention.The present embodiment and previous embodiment
The difference is that in the present embodiment, the first end 212a and the second end 212b are connected with the connector 213.
Specifically, the connector 213 has described in the first joint face being disposed opposite to each other and the second joint face and connection
The side of first joint face and second joint face；The end of first joint face and 212 first end 212a of the conducting piece
Face is opposite to be bonded, second joint face fitting opposite with the end face of 212 second end 212b of the conducting piece；The side and institute
State the opposite fitting of light-emitting surface of illuminating part 211.
The light-emitting surface of the illuminating part 211 is directly fitted with the connector 213, so the initial light is directly projected to
In the connector 213, propagated in the connector 213；The orientation propagated in the connector 213 due to the initial light
Property it is not strong, i.e., the described initial light be directed towards in the connector 213 all directions propagation.So the connector 213
It is connected with the first end 212a and the second end 212b, the initial light for being projected to first joint face can be made, through institute
First end 212a is stated to project in the conducting piece 212；It is projected to the initial light of second joint face, through the second end
212b is projected in the conducting piece 212.
So make the way that the connector 213 is connected with the first end 212a and the second end 212b, it can
The efficiency that the initial light is projected in the conducting piece 212 is improved, the utilization rate of the initial light can be effectively improved, favorably
In the light intensity for improving formed reflected light, energy consumption is advantageously reduced, improves fingerprint image quality.
In addition, from the initial lights of the first end 212a incidences along the conducting piece 212, from first end 212a to second
Hold 212b to propagate, the initial light light intensity and formed light intensity of incident light also along the conducting piece 212 from first end 212a to
Second end 212b gradually decays；From the initial lights of the second end 212b incidences along the conducting piece 212, from second end 212b to
First end 212a is propagated, and the initial light light intensity and formed light intensity of incident light are along the conducting piece 212 from second end 212b
Gradually decay to first end 212a.
So the connector 213 is connected with the first end 212a and the second end 212b, make described initial
Light transmits the way into the conducting piece 213 respectively from the first end 212a and the second end 212b, can effectively carry
High initial light light distribution uniformity coefficient in the conducting piece 212, can effectively improve formed reflected light light intensity point
The uniformity of cloth is conducive to the fingerprint image for obtaining high quality.
In addition, in order to achieve the effect that more preferably to block stray light, in the present embodiment, the shading piece 240 is located at the company
Between fitting 213 and described image sensor 230.And in order to improve shaded effect, the shading piece 240 also extends at least
Between the part conducting piece 212 and described image sensor 230.
As shown in figure 4, in the present embodiment, the illuminating part 211 fits on the side of the connector 213, and described
The light-emitting surface of illuminating part 211 towards described image sensor 230, so the shading piece 240 fit in the connector 213 with
On the opposite side wall of described image sensor 230.
With reference to figure 5, the overlooking structure diagram of fingerprint imaging module 3rd embodiment of the present invention is shown.
The present embodiment and previous embodiment something in common, details are not described herein by the present invention.The present embodiment and previous embodiment
The difference is that in the present embodiment, in the sensing face, the projection of the linear light source 310 is not around the photosensitive area 320
Projection one week, i.e., in the sensing face, the projection of the linear light source 310 does not form the ring projected around the photosensitive area 320
Shape.In the present embodiment, the photosensitive area 320 of described image sensor 330 is circle, in the sensing face, the linear light source 310
Projection forms around the round projection of photosensitive area 320 setting and has annular jaggy.
But in order to obtain the higher incident light of equalization of intensity, to obtain the fingerprint image of high quality, this implementation
In example, in the sensing face, the linear light source projection nucleus projects half cycle or more around the photosensitive area 320.Specifically, this implementation
In example, the photosensitive area 320 is circle, so in the sensing face, it is big that the linear light source 310 projects corresponding central angle
In 180 °, the projection of the linear light source 310 constitutes major arc shape.Make the linear light source 310 in the sensing face projection nucleus around institute
It states photosensitive area 320 and projects half cycle or more in the sensing face, can make on the linear light source 310 at least partly with described photosensitive
The symmetrical centre 321 that area 320 projects is centrosymmetric setting, that is to say, that with to side position on the linear light source 310.
As shown in figure 5, in the linear light source 310, the first segmental arc 322a and the second segmental arc 322b are to side position, so institute
State the anti-of reflected light that incident light produced by the first segmental arc 322a is formed and incident light formation produced by the second segmental arc 322b
Penetrating light can be complementary to one another, and to calibrate the fingerprint image deformation, be conducive to improve recognition success rate.
Correspondingly, the present invention also provides a kind of electronic equipment, including fingerprint imaging of the present invention.
The fingerprint imaging module is for acquiring fingerprint image.The fingerprint imaging module is fingerprint imaging mould of the present invention
Group, specific technical solution refer to the specific embodiment of aforementioned fingerprint imaging modules, and details are not described herein by the present invention.The electronics is set
For according to the obtained fingerprint image of fingerprint imaging module, fingerprint recognition is carried out.
The linear light source light extraction high stability, equalization of intensity is higher, therefore the fingerprint imaging module can
Obtain the fingerprint image of high quality；And the use of the linear light source can also improve the problem of fingerprint image amplification, and reduction refers to
The appearance of print image deformation phenomenon is also beneficial to improve the quality of fingerprint image.So the fingerprint imaging module uses energy
Enough effective quality for improving acquired fingerprint image, to be conducive to the read false rate of the electronic equipment fingerprint image, favorably
In overcoming algorithm to perplex, be conducive to improve fingerprint recognition success rate.
In the present embodiment, the electronic equipment is mobile phone or tablet computer.The use of the fingerprint imaging module can have
Effect improves the success rate of the electronic equipment fingerprint recognition, advantageously reduces read false rate, improves the use of finger or tablet computer
Experience.
To sum up, the linear light source light extraction high stability, equalization of intensity is higher, therefore the use of the linear light source
The uniformity of incident light, incident light in the sensing face is projected to so as to effectively improve produced by capable of effectively improving
Light intensity uniformity is conducive to the fingerprint image for obtaining high quality；And in the sensing face, the projection nucleus of the linear light source around
The projection of described image sensor, therefore the incident light can be emitted from described image sensor surrounding different location, so
It when being formed by reflected light projects to described image sensor, can be complementary to one another, small angle in reflected light is improved to reach
The purpose for spending light component advantageously reduces read false rate, is conducive to overcome fingerprint image to improve the problem of fingerprint image amplifies
Deformation and caused by algorithm perplex problem.Moreover, in other embodiments of the invention, in the sensing face, the linear light source is thrown
Shadow is more than photosensitive area projection half cycle；And in the sensing face, the photosensitive area is projected as centrosymmetric image；
So the incident light that the part linear light source that is centrosymmetric generates, opposite to be emitted, therefore the incident light is formed by reflection luminous energy
Enough it is complementary to one another, so as to effectively reduce the magnification level of fingerprint image, the problem of being conducive to improve fingerprint image amplification,
Be conducive to the reduction of read false rate.In addition, in other embodiments of the invention, the linear light source may include illuminating part and conducting piece；
Wherein, the illuminating part can be light emitting diode, and the conducting piece can be whole body light, such as entirely lighting optical fiber.
So technical solution of the present invention can be on the basis of existing fingerprint imaging module by integrating the illuminating part and the conduction
Part and formed, therefore process operability is strong, and process costs are relatively low, and production can be completed without carrying out larger change to existing producing line
It makes, without increase additional technology cost.In addition, in alternative of the present invention, the fingerprint imaging module further includes：It is located at
Shading piece between the linear light source and described image sensor prevents too strong incident light to be directly projected to described image sensor
And cause to interfere, it can effectively inhibit the noise of described image sensor, be conducive to the letter for improving the fingerprint imaging module
It makes an uproar ratio.
Although present disclosure is as above, present invention is not limited to this.Any those skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (18)
1. a kind of fingerprint imaging module, which is characterized in that including：
Linear light source, for generating incident light；
Sensing face, the incident light form the reflected light for carrying finger print information in the sensing face；
Imaging sensor, for acquiring the reflected light to form fingerprint image；
In the sensing face, the projection of the projection nucleus of the linear light source around described image sensor.
2. fingerprint imaging module as described in claim 1, which is characterized in that described image sensor has photosensitive area；Institute
It states in sensing face, the linear light source projection nucleus is more than photosensitive area projection half cycle.
3. fingerprint imaging module as claimed in claim 2, which is characterized in that in the sensing face, the photosensitive area projection
Centered on symmetric figure；
The linear light source projection is at least partly centrosymmetric with photosensitive area projection symmetrical centre.
4. fingerprint imaging module as described in claim 1, which is characterized in that the linear light source includes：
Illuminating part, for generating initial light；
Conducting piece is connected with the illuminating part, for conducting the initial light to form the incident light, in the sensing face
Interior, the conducting piece projection extends along around the direction of described image sensor projection.
5. fingerprint imaging module as claimed in claim 4, which is characterized in that the illuminating part is light emitting diode.
6. fingerprint imaging module as claimed in claim 4, which is characterized in that the conducting piece is flexible light-conducting body.
7. the fingerprint imaging module as described in claim 4 or 6, which is characterized in that the conducting piece is entirely lighting optical fiber.
8. fingerprint imaging module as claimed in claim 7, which is characterized in that the entirely lighting optical fiber is sent out for liquid core entire body
Light optical fiber or solid core entirely lighting optical fiber.
9. fingerprint imaging module as claimed in claim 4, which is characterized in that the conducting piece has opposite along extending direction
First end and second end；
The illuminating part is connected at least one end in the first end and the second end.
10. fingerprint imaging module as claimed in claim 9, which is characterized in that the linear light source further includes：Connector is located at
Between the illuminating part and the conducting piece.
11. fingerprint imaging module as claimed in claim 10, which is characterized in that one end in the first end and the second end
It is connected with the connector；
The connector has the first joint face and the second joint face being disposed opposite to each other；First joint face and the illuminating part
Light-emitting surface opposite be bonded；Second joint face fitting opposite with the conducting piece first end or the end face of second end.
12. fingerprint imaging module as claimed in claim 11, which is characterized in that the fingerprint imaging module further includes：Shading
Part, between the illuminating part and described image sensor.
13. fingerprint imaging module as claimed in claim 10, which is characterized in that the first end and the second end are and institute
Connector is stated to be connected；
The connector has the first joint face being disposed opposite to each other and the second joint face and connection first joint face and institute
State the side of the second joint face；First joint face fitting opposite with the end face of conducting piece first end, described second connects
Junction fitting opposite with the end face of conducting piece second end；The side and the light-emitting surface of the illuminating part fit.
14. fingerprint imaging module as claimed in claim 13, which is characterized in that the fingerprint imaging module further includes：Shading
Part, between the connector and described image sensor.
15. fingerprint imaging module as claimed in claim 14, which is characterized in that the shading piece also extends at least partly institute
It states between conducting piece and described image sensor.
16. the fingerprint imaging module as described in claim 12 or 14, which is characterized in that the material of the shading piece be metal or
Ink.
17. fingerprint imaging module as claimed in claim 10, which is characterized in that the material of the connector is UV glue.
18. a kind of electronic equipment, which is characterized in that including：Such as claim 1 to claim 17 any one claim institute
The fingerprint imaging module stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710185947.8A CN108629258A (en) | 2017-03-24 | 2017-03-24 | Fingerprint imaging module and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710185947.8A CN108629258A (en) | 2017-03-24 | 2017-03-24 | Fingerprint imaging module and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108629258A true CN108629258A (en) | 2018-10-09 |
Family
ID=63707790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710185947.8A Pending CN108629258A (en) | 2017-03-24 | 2017-03-24 | Fingerprint imaging module and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108629258A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100008552A1 (en) * | 2008-07-14 | 2010-01-14 | Union Community Co., Ltd. | Apparatus for distinguishing living body fingerprint and method thereof |
| CN101814125A (en) * | 2009-02-25 | 2010-08-25 | 金佶科技有限公司 | Optical fingerprint identification system |
| CN102313210A (en) * | 2011-09-09 | 2012-01-11 | 深圳市华星光电技术有限公司 | Backlight module group and liquid crystal display |
| CN104318204A (en) * | 2014-09-29 | 2015-01-28 | 上海箩箕技术有限公司 | Fingerprint imaging system and method, fingerprint identification system, electronic apparatus |
| CN105094461A (en) * | 2015-07-10 | 2015-11-25 | 深圳市汇顶科技股份有限公司 | Apparatus and method for testing touch pressure |
| CN105116968A (en) * | 2015-09-16 | 2015-12-02 | 上海箩箕技术有限公司 | Electronic equipment with fingerprint identification function |
| CN105701465A (en) * | 2016-01-12 | 2016-06-22 | 上海箩箕技术有限公司 | Fingerprint imaging unit and formation method thereof |
| CN106529487A (en) * | 2016-11-18 | 2017-03-22 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
-
2017
- 2017-03-24 CN CN201710185947.8A patent/CN108629258A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100008552A1 (en) * | 2008-07-14 | 2010-01-14 | Union Community Co., Ltd. | Apparatus for distinguishing living body fingerprint and method thereof |
| CN101814125A (en) * | 2009-02-25 | 2010-08-25 | 金佶科技有限公司 | Optical fingerprint identification system |
| CN102313210A (en) * | 2011-09-09 | 2012-01-11 | 深圳市华星光电技术有限公司 | Backlight module group and liquid crystal display |
| CN104318204A (en) * | 2014-09-29 | 2015-01-28 | 上海箩箕技术有限公司 | Fingerprint imaging system and method, fingerprint identification system, electronic apparatus |
| CN105094461A (en) * | 2015-07-10 | 2015-11-25 | 深圳市汇顶科技股份有限公司 | Apparatus and method for testing touch pressure |
| CN105116968A (en) * | 2015-09-16 | 2015-12-02 | 上海箩箕技术有限公司 | Electronic equipment with fingerprint identification function |
| CN105701465A (en) * | 2016-01-12 | 2016-06-22 | 上海箩箕技术有限公司 | Fingerprint imaging unit and formation method thereof |
| CN106529487A (en) * | 2016-11-18 | 2017-03-22 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209625238U (en) | Shield lower optical fingerprint identification system and electronic device | |
| CN208861297U (en) | Optical sensor module and electronic equipment | |
| WO2020035021A1 (en) | Lcd fingerprint recognition system, under-screen optical fingerprint recognition device, and electronic device | |
| CN109074495A (en) | Improve the optical sensing performance of optical sensor module under the screen for shielding upper fingerprint sensing | |
| CN109154959A (en) | Optical fingerprint sensor with non-contact imaging capability | |
| CN110520863A (en) | Three-dimensional optical pattern sensing is carried out to fingerprint using lower optical sensor module is shielded | |
| CN109196524A (en) | Optical imagery under screen in equipment with Organic Light Emitting Diode (OLED) screen or other screens for shielding upper fingerprint sensing in optical sensor module via imaging len and image pinhole | |
| CN109901313A (en) | Detect mould group, backlight module, display device and electronic equipment | |
| US20100039508A1 (en) | Face Recognition Apparatus Based on Even Light Source | |
| CN108256399B (en) | Fingerprint imaging module and electronic equipment | |
| TWM568429U (en) | Electronic apparatus and image capture module thereof | |
| CN108537090A (en) | Fingerprint imaging module and electronic equipment | |
| US10546175B2 (en) | Optical fingerprint module | |
| TW201713963A (en) | Optical apparatus | |
| CN109063621A (en) | A kind of mobile terminal | |
| CN106774656B (en) | Sensor assembly, cover plate, mobile terminal and terminal control method | |
| CN109977851A (en) | Detect mould group, display device and electronic equipment | |
| CN108629257A (en) | Fingerprint imaging module and electronic equipment | |
| CN211087258U (en) | Optical fingerprint identification device and electronic equipment | |
| CN104794466A (en) | Living body biological characteristic information optimal image acquisition module and mobile terminal | |
| CN108694361A (en) | Fingerprint imaging module and electronic equipment | |
| CN108388827A (en) | Fingerprint imaging module and electronic equipment | |
| CN108629258A (en) | Fingerprint imaging module and electronic equipment | |
| CN109151119A (en) | With the mobile device shielded comprehensively | |
| CN110502145A (en) | Infrared touch-control screen system based on grating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181009 |
|
| WD01 | Invention patent application deemed withdrawn after publication |