CN107958180A - Light-guide device, photoelectric sensing module and electronic device - Google Patents
Light-guide device, photoelectric sensing module and electronic device Download PDFInfo
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- CN107958180A CN107958180A CN201710353446.6A CN201710353446A CN107958180A CN 107958180 A CN107958180 A CN 107958180A CN 201710353446 A CN201710353446 A CN 201710353446A CN 107958180 A CN107958180 A CN 107958180A
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Classifications
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
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- Theoretical Computer Science (AREA)
- Image Input (AREA)
Abstract
The present invention discloses a kind of light-guide device, sets the photoelectric sensing module and electronic device of the light-guide device.Light-guide device includes：The light guide section being arranged on photo-sensing device, the light beyond presumptive area to be removed, makes light be transmitted in the presumptive area.The light-guide device is arranged at photoelectric sensing module, and the electronic device includes the photoelectric sensing module.
Description
Technical field
The present invention relates to field of biological recognition, more particularly to a kind of light-guide device, photoelectric sensing module and there is the biology
Identify the electronic device of module.
Background technology
At present, photoelectric sensing module, e.g., fingerprint recognition module, has been increasingly becoming the standard configuration of the electronic products such as mobile terminal
Component.So, the Image Acquisition precision of photoelectric sensing module also needs to improve.
The content of the invention
Embodiment of the present invention is intended at least solve one of technical problem existing in the prior art.For this reason, the present invention is real
The mode of applying needs to provide a kind of light-guide device, photoelectric sensing module and the electronic device with the photoelectric sensing module.
A kind of light-guide device of embodiment of the present invention, including the light guide section being arranged on photo-sensing device, to by advance
Determine the light beyond region to remove, light is transmitted in the presumptive area.
In some embodiments, the photo-sensing device includes light receiving unit, and the light guide section is led including first
Light portion, first light guide section are arranged on the light receiving unit.
In some embodiments, the photo-sensing device further includes light transmitting element, and the light guide section further includes second
Light guide section, and second light guide section is arranged on the smooth transmitting element.
In some embodiments, the light guide section includes some thang-kng pipelines, and the pipeline of some thang-kng pipelines
Wall is bonded to each other, and forms the presumptive area.
In some embodiments, the caliber of the thang-kng pipeline of the light guide section on the light receiving unit is less than and is located at
The caliber of the thang-kng pipeline of light guide section on light transmitting element.
In some embodiments, the light guide section include some first areas passed through for light and with some prevention light
The second area that line passes through, and do not connected mutually between the first area, form the presumptive area.
In some embodiments, the first area is formed for through hole or by light transmissive material.
In some embodiments, the second area is formed by filter or light absorbing material.
In some embodiments, the cross-sectional area of first area compares position in the light guide section on the light receiving unit
The cross-sectional area of first area is small in the light guide section on the smooth transmitting element.
In some embodiments, the light guide section on the smooth transmitting element is tilted along the optical transmission direction needed and set
Put.
In some embodiments, second light guide section is obliquely installed towards the side close to first light guide section.
In some embodiments, the angle of inclination of second light guide section is 35 °~65 °.
In some embodiments, the light-guide device, which further includes, is arranged on first light guide section and the described second leaded light
The first shading wall between portion.
In some embodiments, the light-guide device further includes the second shading being arranged on the outside of second light guide section
Wall.
In some embodiments, the light on the light receiving unit enters in presumptive area, and incidence angle is more than default
The light of angle is totally reflected in presumptive area.
In some embodiments, the shape of cross section of the thang-kng pipeline for circle, ellipse, triangle row, polygon,
Or irregular shape.
In some embodiments, the caliber of the thang-kng pipeline of the light guide section on light receiving unit is less than
25um。
In some embodiments, the light-guide device is used in optical profile type image sensing module.
A kind of photoelectric sensing module of embodiment of the present invention, including photo-sensing device, and it is arranged on photo-sensing device
On any of the above-described embodiment light-guide device.
A kind of electronic device of embodiment of the present invention, includes the photoelectric sensing module of any of the above-described embodiment.
By setting light-guide device so that photoelectric sensing module has as follows a little when carrying out bio-identification：
(1) when photoelectric sensing module carries out light sensing, by light-guide device, prevent neighbouring light by so that
The interference that the optical signal that the photoinduction unit below light-guide device receives avoids neighbouring light is obtained, improves light collection
Accuracy rate and clarity, and then improve the accuracy rate of bio-identification.
(2) light-guide device can be with after independently prepared, then is arranged in photoelectric sensing module, so as to greatly accelerate photoelectricity
Sense the preparation process of module.
(3) light-guide device can not only control the light on light receiving unit to propagate, and avoid the phase between neighbouring light
Mutually interference, but also the light on light transmitting element can be controlled to propagate so that the light that light source is sent is according to default propagation
Direction is propagated towards cover sheet, therefore adds the light signal strength for reaching cover sheet, so as to improve light collection
Clarity, and then improve the accuracy rate of bio-identification.
The additional aspect and advantage of embodiment of the present invention will be set forth in part in the description, partly by from following
Become obvious in description, or recognize by the practice of embodiment of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of embodiment of the present invention retouch embodiment from reference to accompanying drawings below
It will be apparent and be readily appreciated that in stating, wherein：
Fig. 1 is light path schematic diagram when optical fingerprint identification module of the present invention carries out fingerprint recognition；
Fig. 2 is the cross section structure schematic diagram of one embodiment of light-guide device of embodiment of the present invention；
Fig. 3 is the overlooking the structure diagram of another embodiment of light-guide device of embodiment of the present invention；
Fig. 4 a are the overlooking the structure diagrams of the another embodiment of light-guide device of embodiment of the present invention；
Fig. 4 b are the overlooking the structure diagrams of the another embodiment of light-guide device of embodiment of the present invention；
Fig. 5 be embodiment of the present invention light-guide device in light path schematic diagram of light when passing through；
Fig. 6 is the structure diagram of one embodiment of photoelectric sensing module of embodiment of the present invention；
Fig. 7 is the light path schematic diagram in the photoelectric sensing module of embodiment of the present invention；
Fig. 8 is the structure diagram of another embodiment of photoelectric sensing module of embodiment of the present invention；
Fig. 9 is the structure diagram of the another embodiment of photoelectric sensing module of embodiment of the present invention；
Figure 10 is the structure diagram of the another embodiment of photoelectric sensing module of mode of the present invention；
Figure 11 is the floor map of the electronic device of embodiment of the present invention.
Embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is same or like element.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that term " first ", " second " are only used for description purpose, and cannot
It is interpreted as indicating or implies relative importance or imply the quantity of the technical characteristic indicated by indicating.Thus, define " the
One ", one or more feature can be expressed or be implicitly included to the feature of " second ".In description of the invention
In, " multiple " are meant that two or more, unless otherwise specifically defined.
In the description of the present invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection or can be in communication with each other；It can be directly connected, can also be by between intermediary
Connect connected, can be the interaction relationship of connection inside two elements or two elements.For the ordinary skill of this area
For personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
Following disclosure provides many different embodiments or example is used for realizing the different structure of the present invention.In order to
Simplify disclosure of the invention, hereinafter to the components of specific examples and be set for describing.Certainly, they are merely examples, and
And it is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or reference letter,
This repetition is for purposes of simplicity and clarity, itself not indicate between discussed various embodiments and/or setting
Relation.In addition, the present invention provides various specific techniques and material examples, but those of ordinary skill in the art can be with
Recognize the application of other techniques and/or the use of other materials.
Further, described feature, structure can be incorporated in one or more embodiment party in any suitable manner
In formula.In the following description, there is provided many details fully understand embodiments of the present invention so as to provide.So
And one of ordinary skill in the art would recognize that, without one or more in the specific detail, or using other structures,
Constituent element etc., can also put into practice technical scheme.In other cases, it is not shown in detail or describes known features or behaviour
Make to avoid the fuzzy present invention.
Existing a kind of photoelectric sensing module, by taking photoelectric sensing module as an example, as shown in Figure 1, the photoelectric sensing module bag
Bottom plate 101 is included, light source 102, the photoinduction unit 103 being arranged on bottom plate 101, and cover sheet 104.Photoinduction unit
103 are located at the inner side of light source 102, and the array structure formed including multiple photo-sensing device.When finger 105 is placed on protection cap
When on plate 104, after the light arrival cover sheet 104 that light source 102 is sent, since finger print has valley and a ridge two parts, so
By the part of ridge diffusing reflection will occur for light, and by the part of paddy mirror-reflection will occur for light.Light after reflection will be by
Photoinduction unit 103 receives, and the optical signal received is converted to corresponding electric signal by photoinduction unit 103, and transmits
To signal processing circuit.Since larger difference occurs in the reflected signal of the valley and a ridge of fingerprint, that is, receive the reflection of the paddy of fingerprint
The electric signal of the photo-sensing device output of signal is stronger, receives the electricity of the photo-sensing device output of the reflected signal of the ridge of fingerprint
Signal is weaker, therefore signal processing circuit is true according to the power for the electric signal that each photo-sensing device exports in photoinduction unit 103
Determine the ridge of fingerprint and the position of paddy, and then form fingerprint image.
However, since the spacing between the valley and a ridge of fingerprint is also very small, and light passes through the part of the ridge of fingerprint
Diffusing reflection can occur, so neighbouring reflected signal interferes with each other, each photo-sensing device is an actually-received in photoinduction unit 103
Reflected signal can not reflect real reflected signal so that cause optical fingerprint sensor gather fingerprint image it is clear
Degree and accuracy rate are relatively low.
In this regard, the present invention proposes a kind of light-guide device, which can be applied to photoelectric sensing module, especially optics
Formula image recognition module, which will sense the image information of target object, with the image according to sensing
Information identifies the identity of target object.And the image information may include finger print information, palm print information, ear line information and human body its
The dermatoglyph information of his position.Certainly, it is not excluded that the light-guide device is applied in other identification technologies of optical profile type, with solution
The problem of certainly carrying out Image Acquisition using light.
The light-guide device is mainly disposed on photo-sensing device, with the light for sending or receiving to photo-sensing device transmit into
Row control, such as the light beyond presumptive area is removed so that light transmits in predetermined region.It is so that neighbouring
It will not be interfered with each other between light, improve the accuracy rate and clarity of light collection.
Fig. 2, a kind of light-guide device 200 of embodiment of the present invention are refer to, including is arranged on leading on photo-sensing device
Light portion 210.Each light guide section 210 include some first areas 211 passed through for light and it is some prevent that light passes through the
Two regions 212.I.e. light enters from the side of light guide section 210, during by first area 211, will enter first area 211, and
The transmission in first area 211, and projected by the opposite side of light guide section 210；, will be by second area during by second area 212
212 prevent so that by second area 212 light not by or it is very weak, have substantially no effect on photoinduction unit 303
Light sensing, so as to will not be interfered with each other between neighbouring light, improve the accuracy rate and clarity of light collection.
In some instances, above-mentioned light guide section 210 can be into a single integrated structure, as shown in figure 3, connecting between the second area 212
Integrally, and several first areas 211 are defined, is not connected mutually between each first area 211.So that the light guide section
210 preparation process is simpler, and adds the structural strength of light guide section 210.Furthermore the light guide section 210 of integrative-structure
Also allow for being arranged on photo-sensing device.
It refer to Fig. 4 a and Fig. 4 b, the light guide section 210 in the embodiment may include some thang-kng pipelines 213, the thang-kng
Pipeline 213 forms light guide section 210 by the mode such as being bonded, bundling.The thang-kng pipeline 213 includes tube wall 2131 and tube wall 2131 encloses
Close the light-path formed, i.e. light hole 2132.The tube wall 2131 of each thang-kng pipeline 213 is collectively forming second area 212, each thang-kng
The light hole 2132 of pipeline 213 is collectively forming first area 211.The shape of cross section of the light hole 2132 can be circular, oval
Shape, triangle, polygon etc..Since fitting forms light guide section 210 between the plurality of thang-kng pipeline 213, triangle or
Seamless fitting can be realized between the thang-kng pipeline 213 of polygon, so as to avoid light from the gap between thang-kng pipeline 213
Pass through.Certainly, if the aperture of thang-kng pipeline 213 is sufficiently small, can also be realized between the thang-kng pipeline 213 of other shapes basic
It is seamless.With changing, the gap between each thang-kng pipeline 213 can also be filled by packing material, to form second area
212 part.
In order to reduce interfering with each other between neighbouring light, the aperture of above-mentioned light hole 2132 is as small as possible, such as less than
25um；Moreover, the tube wall of above-mentioned thang-kng pipeline 213 is as thin as possible, such as 1-2um.
Above-mentioned thang-kng pipeline 213 can be with after independently prepared, then is fixed by the mode such as being bonded, bundling, and is led with being formed
Light portion 210, can so accelerate the preparation process of light guide section 210.And the thang-kng pipeline 213 can also utilize existing structure
Realize, such as optical fiber.Preparation process so is simplified, and reduces manufacturing cost.
Transmission of the light in above-mentioned first area 211 employs the total reflection principle of light, as shown in figure 5, with through hole
Exemplified by 2132, after light enters from one end of through hole 2132, vertically into light L1 can be along through hole 2132 from through hole 2132
The other end vertically projects, when light L2 and the angle theta between the normal M1 of the inner side tube wall of through hole 2132 are more than through hole
During 2132 critical angle, light is totally reflected in through hole 2132, from the other end of through hole 2132 after multiple total reflection
Project.Since in transmitting procedure of the light in light guide section 210, if be totally reflected, energy will not lose, otherwise energy will
It can be damaged.In other words, the incidence angle (such as θ shown in Fig. 5) that light guide section 210 is entered when light occurs more than light guide section 210
During the critical angle of total reflection, which will be totally reflected in the first area 211 of light guide section 210, i.e. the light ray energy
It will not lose；When light enters the incidence angle of light guide section 210 less than or equal to the critical angle that light guide section 210 is totally reflected
When, which cannot be totally reflected in the first area 211 of light guide section 210, i.e., the light ray energy can lose.Therefore, when
When the light guide section 210 is applied in light path, as long as ensureing that the critical angle that light guide section 210 is totally reflected is more than neighbouring light
Into light guide section 210 first area 211 when incidence angle, it is possible to effectively avoid occurring mutually between neighbouring light dry
Disturb.
Fig. 2 is continued referring to, in other embodiments, the first area 211 in light guide section 210 is by light transmissive material shape
Into second area 212 is formed by filter or light absorbent.Since the first area 211 will ensure that light passes through printing opacity
Material can select the larger material of light transmittance, such as glass, PMMA (acrylic), PC (makrolon) etc..Second area
212 need to prevent light by the way that therefore second area 212 selects the preferable light absorbent of extinction effect, such as black carbon material, glass
Glass cellucotton etc..Certainly, which can also select filter, and most light is all filtered out, only surplus
A small amount of light passes through down.In this way, a small amount of light substantially will not cause neighbouring light too big interference, so as to also carry
The high accuracy rate of light collection.
In order to avoid interfering with each other between neighbouring light, accuracy rate and clarity that raising light gathers, above-mentioned first
The cross-sectional area in region 211 and the cross-sectional area of second area 212 are as small as possible, and the cross-sectional area of first area is more than second
The cross-sectional area in region.
Above-mentioned light guide section 210 can be initially formed second area 212, then be filled thoroughly in the region that second area 212 surrounds
Luminescent material, forms first area 211.It is of course also possible to first area 211 is initially formed, then the region surrounded in first area 211
Interior filling light absorbent, forms second area 212.Since first area 211 can be formed together, another rise forms second area
212, hence in so that the preparation process of light guide section 210 is simpler.
In other embodiments, above-mentioned first area 211 can also be that through hole is set, and so can only form second
Region 212, the region that second area 212 surrounds form first area 211.It is, of course, also possible to first provide a light absorbent
Plate, then on the plate several first areas 211 are formed using modes such as laser.
Fig. 6 is refer to, when the above-mentioned light-guide device with light guide section is applied to photoelectric sensing module 300, the photoelectric sensing
Module 300 may include bottom plate 301 and cover sheet 302 set up and down, which is equipped with 303 He of photoinduction unit
Light source 304.Photoinduction unit 303 includes some photo-sensing device, which can form along array, also can be according to other
Arrangement mode formed.Light source 304 is arranged on the outside of photoinduction unit 303.The light source 304 can be self-illuminating structure, example
Such as Organic Light Emitting Diode.If the light source 304 can also be arranged on the lower section of bottom plate 301 certainly for this, and bottom plate 301 is light transmissive material
Formed, or the through-hole structure that the light sent for light source 304 passes through is formed on bottom plate 301.In some instances, the light source 304
The side of bottom plate 303 is arranged on, and is guided the light that light source 304 is sent to cover sheet 302 by light guide plate or light-strip.
The light that light source 304 is sent forms light sending zone S2；The light that light source 304 is sent is reflected back through cover sheet 302 and finger
The light come is received by photoinduction unit 303, then the light reflected forms optical receiving region S1.
Light-guide device 400 is additionally provided with above-mentioned photoelectric sensing module 300, which is arranged on photoinduction unit
303 and the top of light source 304, that is, the lower section of cover sheet 302.The light-guide device 400 includes being arranged on light receiving unit, i.e.,
The first light guide section 410 on photoinduction unit 303, and be arranged on light transmitting element, i.e., the second light guide section 420 on light source 304.
Second light guide section 420 is correspondingly arranged on light source 304, and the light for causing light source 304 to send is propagated in the predetermined direction
To cover sheet 302.First light guide section 410 is correspondingly arranged on photoinduction unit 303, for causing through cover sheet 302
And the light that finger reflects is accurate to up on photoinduction unit 303, and will not be disturbed mutually between neighbouring light.
In some embodiments, the surface area of the first light guide section 410 is equal or slightly larger than the surface of photoinduction unit 303
Product so that the first light guide section 410 is completely covered by photoinduction unit 303.The surface area of second light guide section 420 is equal or slightly larger than
The surface area of light source 304 so that the second light guide section 420 is completely covered by light source 304.
Incorporated by reference to reference to Fig. 7, when finger 600 is placed on cover sheet 302, light that light source 304 is sent is by the
Two light guide sections 420, cover sheet is reached by the direction of propagation of vertical cover sheet 302 or the vertical direction of offset cover sheet
302, and reflected by the ridge and valley timesharing of finger print, the signal after reflection is after the first light guide section 410 by light
Sensing unit 303 receives.When light passes through the valley timesharing of finger print, since valley point does not contact with cover sheet 302, because
The light of this part is totally reflected, and the light after reflection is after the first light guide section 410, by photoinduction unit 303
One photo-sensing device 303a and photo-sensing device 303b is received, and is not affected by the interference of the reflection light of neighbouring ridge part.
When light passes through the ridge part of finger print, since ridge part is contacted with cover sheet 302, the light generation of the part
Diffusing reflection, the light after reflection is after the first light guide section 410, when passing through the first light guide section 410 due to neighbouring light, or
Light is prevented by the second area of the first light guide section 410, otherwise light enters when entering the second area of the first light guide section 410
Firing angle is less than or equal to the critical angle of the total reflection of the first light guide section 410, therefore can not be totally reflected, and light will be first
Energy loss, the i.e. light intensity after the first light guide section 410 are caused in communication process in the first area of light guide section 410
It is very weak, the light sensing of photo-sensing device is not interfered with substantially.In this way, by the setting of light-guide device 400, improve light and adopt
The accuracy rate of collection, and then improve the accuracy rate of fingerprint recognition.
It should be noted that the structure of above-mentioned first light guide section, 410 and second light guide section 420 can refer to above-mentioned light guide section
Structure.So, alternatively, which needs to ensure complete printing opacity, therefore in some embodiments, this second
Light guide section 420 can not also set any structure, or be arranged to transparent material layer.
In addition, in order to ensure that photoinduction unit 303 can sense more light, i.e., to ensure the light that light source 304 is sent
Line is as much as possible to propagate to cover sheet 302, therefore the light guide section being arranged on light source 304, i.e. the second light guide section 420, leads to
The caliber of light tunnel can be more slightly larger than what the caliber of the thang-kng pipeline of the first light guide section 410 was set, i.e., more than 25um.Similarly, it is right
In another middle structure of light guide section, the light guide section that can also be arranged on light source 304, i.e. the second light guide section 420, first area
Cross-sectional area can than in the first light guide section 410 first area cross-sectional area set it is slightly larger.
In some embodiments, as shown in figure 8, in order to avoid light source 304 light to the sensing of photoinduction unit 303
Interfere, neighbour of the above-mentioned light-guide device 400 between the luminous zone S2 of light source 304 and the photosensitive area S1 of photoinduction unit 303
Meet place and the first shading wall 430 is set, is i.e. first shading wall 430 is set between the first light guide section 410 and the second light guide section 420.It is logical
Cross the first shading wall 430 optical receiving region S1 can effectively to be isolated with light sending zone S2, so as to avoid light source 304 from sending out
The light gone out influences the light sensing of photoinduction unit 303.
Fig. 9 is refer to, since light source 304 is set around photoinduction unit 303, i.e., photoinduction unit 303 is positioned at centre, light
Source 304 is located at the outside of photoinduction unit 303, therefore, in order to enable the light that sends of light source 304 by cover sheet 302 and
After the reflection of finger 600, it can be accurate to up to photoinduction unit 303 and be absorbed by photoinduction unit 303, therefore second leaded light
Portion 420, which slopes inwardly, to be set, i.e., is drawn close towards the first light guide section 410.In some embodiments, which inclines
Oblique angle β is 35 °~65 °.The inclination angle beta includes but is not limited to the size and protection according to photoinduction unit 303
The thickness size of cover board 302 determines, to ensure optimal light guide effect.For example, the inclination angle beta may be configured as 42 °, 50 °,
56 °, 60 ° etc..
So, in other embodiments, the setting angle of light source 304 can also be set, so that the light that light source 304 is sent
Inwards tilt, as shown in Figure 10.And shape between the mounting plane of the light source 304 and the mounting plane of photoinduction unit 303
Into angle be 25 °~55 °.The angle of inclination includes but is not limited to the size and guarantor according to photoinduction unit 303
The thickness size of protecting cover plate 302 determines, to ensure optimal light guide effect.For example, the inclination angle beta may be configured as 30 °,
34 °, 40 °, 48 ° etc..
With continued reference to Fig. 9, in other embodiments, in order to prevent the light of light source 304 from dissipating so that light source 304
Light is propagated towards cover sheet 302, and light-guide device 400, which further includes, is arranged on the outermost second shading walls of light sending zone S2
440, i.e. the outside of the second light guide section 420 sets the second shading wall 440.So so that the light that light source 304 is sent is along second
Light guide section 420 is propagated towards cover sheet 302, avoids light loss, so as to improve luminous illumination, increase photoinduction unit 303 is felt
The intensity of light is surveyed, and then improves the clarity of light collection.
It should be noted that the structure of above-mentioned light-guide device 400 is only the photoelectric sensing of application in the above-described embodiment
One example of module, does not limit the structure of light-guide device 400.The light-guide device can be applied to by deforming accordingly
The photoelectric sensing module of other structures, such as the position relationship of the first light guide section and the second light guide section, size and specific structure
Etc., do not enumerate here.
It refer to Figure 11, a kind of electronic device 500 of embodiment of the present invention, including the as above preparation of any embodiment
The photoelectric sensing module that method is obtained.
In above-mentioned electronic device 500, since photoelectric sensing module is provided with light-guide device, it is located at photoelectric transfer in target object
When feeling on module, light that cover sheet and finger of the light through overprotection photoelectric sensing module that light source is sent reflect,
Light-guide device is first passed through, then is gathered by photoinduction unit.And the light-guide device is with being effectively prevented between neighbouring light
Interfere with each other, especially light by interference of the irreflexive reflection light that is occurred of ridge part of finger to neighbouring light,
Therefore the electronic device of the photoelectric sensing module has been used when carrying out Image Acquisition, improve the image essence of collection target object
Degree.
Specifically, electronic device 500 is as being consumption electronic products or household formula electronic product or vehicular electronic product.
Wherein, consumption electronic products be such as mobile phone, tablet computer, laptop, tabletop display, computer all-in-one machine are all kinds of should
With the electronic product of biological identification technology.Household formula electronic product is such as intelligent door lock, TV, refrigerator, Wearable are each
The electronic product of class application biological identification technology.Vehicular electronic product is such as automatic navigator, vehicle-carrying DVD.
In the example of fig. 11, electronic device 500 is mobile phone, and the front of mobile phone is provided with touch-screen and display device 400,
Photoelectric sensing module is arranged on below the front shroud of electronic device 500.In one example, when the biological characteristic letter for needing to gather
Cease for finger print information when, perform finger print information collection when, target object 200 is finger, and finger is placed on electronic device 500
On so that after touch-screen can determine that contact area of the finger on photoelectric sensing module 100, photoelectric sensing module 100 carry out
The collection of continuous finger print information.
So, ground is changed, in other embodiments, the photoelectric sensing module 100 may also be arranged on touch-screen and show
On showing device 400.In addition, the Image Acquisition part of the photoelectric sensing module 100 can also be integrated into bio-identification chip, it is corresponding
The suitable positions such as the front, the back side and side of electronic device 500 are arranged on, and, it can both expose the outer of electronic device 500
Surface, may also be arranged on the inside of electronic device 500 and adjacent housings.
It is pointed out that above-mentioned example is some examples for understanding embodiment of the present invention for convenience and making, and
It should not be construed as limiting the scope of the invention.
In the description of this specification, reference term " embodiment ", " certain embodiments ", " schematically implementation
The description of mode ", " example ", " specific example " or " some examples " etc. means with reference to the embodiment or example description
Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the present invention.In this specification
In, schematic expression of the above terms is not necessarily referring to identical embodiment or example.Moreover, the specific spy of description
Sign, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, " multiple " are meant that at least two, such as two, three
It is a etc., unless otherwise specifically defined.
Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiment is
Exemplary, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be right
The above embodiment is changed, changes, replacing and modification.
Claims (20)
- A kind of 1. light-guide device, it is characterised in that including the light guide section being arranged on photo-sensing device, to by presumptive area with Outer light removes, and light is transmitted in the presumptive area.
- 2. light-guide device as claimed in claim 1, it is characterised in that the photo-sensing device includes light receiving unit, and institute Stating light guide section includes the first light guide section, and first light guide section is arranged on the light receiving unit.
- 3. light-guide device as claimed in claim 2, it is characterised in that the photo-sensing device further includes light transmitting element, institute State light guide section and further include the second light guide section, and second light guide section is arranged on the smooth transmitting element.
- 4. light-guide device as claimed in claim 2 or claim 3, it is characterised in that the light guide section includes some thang-kng pipelines, and institute The duct wall for stating some thang-kng pipelines is bonded to each other, and forms the presumptive area.
- 5. light-guide device as claimed in claim 4, it is characterised in that the thang-kng of the light guide section on the light receiving unit The caliber of pipeline is less than the caliber of the thang-kng pipeline of the light guide section on the smooth transmitting element.
- 6. light-guide device as claimed in claim 2 or claim 3, it is characterised in that the light guide section includes some for light passing through First area and the second area passed through with some prevention light, and do not connected mutually between the first area, formed described pre- Determine region.
- 7. light-guide device as claimed in claim 6, it is characterised in that the first area is for through hole or by light transmissive material shape Into.
- 8. light-guide device as claimed in claim 6, it is characterised in that the second area is by filter or light absorbing material Formed.
- 9. light-guide device as claimed in claim 6, it is characterised in that first in the light guide section on the light receiving unit The cross-sectional area in region is smaller than the cross-sectional area of first area in the light guide section on the smooth transmitting element.
- 10. light-guide device as claimed in claim 3, it is characterised in that the light guide section edge on the smooth transmitting element needs The optical transmission direction wanted is obliquely installed.
- 11. light-guide device as claimed in claim 10, it is characterised in that second light guide section is towards close to the described first leaded light The side in portion is obliquely installed.
- 12. light-guide device as claimed in claim 11, it is characterised in that the angle of inclination of second light guide section for 35 °~ 65°。
- 13. light-guide device as claimed in claim 3, it is characterised in that the light-guide device, which further includes, is arranged on described first The first shading wall between light guide section and second light guide section.
- 14. the light-guide device as described in claim 3 or 13, it is characterised in that the light-guide device further include be arranged on it is described The second shading wall on the outside of second light guide section.
- 15. light-guide device as claimed in claim 1, it is characterised in that the light on the light receiving unit enters fate In domain, the light that incidence angle is more than predetermined angle is totally reflected in presumptive area.
- 16. light-guide device as claimed in claim 4, it is characterised in that the shape of cross section of the thang-kng pipeline is circular, ellipse Circle, triangle row, polygon or irregular shape.
- 17. light-guide device as claimed in claim 4, it is characterised in that the light guide section on light receiving unit leads to The caliber of light tunnel is less than 25um.
- 18. light-guide device as claimed in claim 1, it is characterised in that the light-guide device is used in optical profile type image sensing mould In group.
- 19. a kind of photoelectric sensing module, it is characterised in that including photo-sensing device and be arranged on the photo-sensing device Such as claim 1-18 any one of them light-guide devices.
- 20. a kind of electronic device, it is characterised in that including photoelectric sensing module as claimed in claim 19.
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| CN201710353446.6A CN107958180B (en) | 2017-05-18 | 2017-05-18 | Light guide element, photoelectric sensing module and electronic device |
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| CN201710353446.6A CN107958180B (en) | 2017-05-18 | 2017-05-18 | Light guide element, photoelectric sensing module and electronic device |
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| CN109979326A (en) * | 2019-03-23 | 2019-07-05 | 深圳阜时科技有限公司 | A kind of display device and electronic equipment |
| CN110032950A (en) * | 2019-03-23 | 2019-07-19 | 深圳阜时科技有限公司 | A kind of pedestal and sensing mould group |
| CN110070799A (en) * | 2019-03-23 | 2019-07-30 | 深圳阜时科技有限公司 | A kind of display device and electronic equipment |
| CN110807418A (en) * | 2019-10-31 | 2020-02-18 | 维沃移动通信有限公司 | Electronic device |
| CN113109551A (en) * | 2021-03-30 | 2021-07-13 | 海南华盛混凝土有限公司 | Concrete collapse and expansion testing device |
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| CN107958180B (en) | 2020-07-24 |
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