CN106778598A - Fingerprint recognition module with backlight - Google Patents
Fingerprint recognition module with backlight Download PDFInfo
- Publication number
- CN106778598A CN106778598A CN201611140947.8A CN201611140947A CN106778598A CN 106778598 A CN106778598 A CN 106778598A CN 201611140947 A CN201611140947 A CN 201611140947A CN 106778598 A CN106778598 A CN 106778598A
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- China
- Prior art keywords
- light
- fingerprint recognition
- recognition module
- light emitting
- panel
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- 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
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- 239000000463 material Substances 0.000 claims abstract description 52
- 239000012790 adhesive layer Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000011859 microparticle Substances 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000005538 encapsulation Methods 0.000 description 4
- 239000012780 transparent material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229910052693 Europium Inorganic materials 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/04—Signs, boards or panels, illuminated from behind the insignia
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Image Input (AREA)
Abstract
The invention discloses a kind of fingerprint recognition module with backlight, wherein being additionally arranged at least one light emitting source being connected with the circuit board of module；Transparent area is additionally arranged on the panel of module；Meanwhile, the encapsulating material of fingerprint recognition chip is made up of light transmissive material, and the light that the light emitting source is sent is main light-conductive media with encapsulating material, and can be projected at the transparent area after encapsulated material from panel.Wherein, the light emitting source outside encapsulating material, or can be packaged in inside encapsulating material together with the naked core.The present invention can realize the backlight function of fingerprint recognition module in limited space, and the light-transparent pattern that transparent area is formed on its panel can be made to light.
Description
Technical field
The present invention relates to fingerprint recognition module, particularly know for the capacitance sensor type fingerprint in the products such as smart mobile phone
Other module or radio frequency sensor formula fingerprint recognition module, more specifically to one kind with encapsulating material as main light-conductive media,
Fingerprint recognition module with backlight.
Background technology
The fingerprint repetitive rate of people is minimum, about 1/15000000000th, the characteristic with " human body identity card "；Because it has
Unchangeable property, uniqueness and convenience, have almost turned into the synonym of living things feature recognition.The application of fingerprint identification technology is non-
Often extensively, the fingerprint recognition module of load of particularly being arranged in pairs or groups on smart mobile phone, quantity is very huge.According to statistics, China's intelligence
Mobile phone market shipment amount monthly is up to 80,000,000 or so, and the mobile phone of fingerprint recognition module of arranging in pairs or groups month shipment amount is probably 3500
Ten thousand~40,000,000.
As shown in figure 9, in the fingerprint recognition module 901 of load of being arranged in pairs or groups on smart mobile phone, generally using capacitive sensing
Device or radio frequency sensor, the panel of this fingerprint recognition module can not light, it is impossible to be lit that specific light-transparent pattern (example is presented
Such as enterprise trademark)；If specific light-transparent pattern can be presented, the aesthetic and brand that will greatly improve fingerprint recognition module are distinguished
Knowledge and magnanimity.
The typical structure of fingerprint recognition module is as shown in figure 1, the fingerprint recognition module 100 can be by circuit board 104 and intelligence
In the mainboard electrical connection of energy interior of mobile phone.The top of Fig. 1 is to place finger to carry out the panel 102 of fingerprint recognition for user,
It is a circle becket 103 around panel 102.L long, the width W sizes of panel therein 102 are substantially in 10mm or so.
The side, sectional design sketch of the fingerprint recognition module is illustrated in figure 2, wherein, fingerprint recognition chip 203 and circuit
Plate 104 is electrically connected.Fingerprint recognition chip 203 is fitted by the panel 102 that adhesive layer 202 and bottom surface scribble ink 201.It is therein
Panel 102 (or cover plate) can be made up of materials such as glass, sapphire, ceramics, resins.The panel of existing fingerprint recognition module is not
Can be luminous, reason is the limitation of its structure.Fig. 2 is to amplify the effect illustrated, and the actual (real) thickness size of each several part is very small, wherein
The thickness H1 of whole fingerprint recognition module by its realization, be strict with itself by function, and the lightening limitation of mobile phone, typically
All there was only 1mm or so；The thickness H5 of adhesive layer 202 is between 0.01~0.02mm；The thickness H3 of panel 102 is about 0.2mm；Core
The thickness H4 of piece encapsulation is about 0.1mm；And the identification thickness that fingerprint recognition chip can be supported, i.e., it is in one's hands from chip naked core upper surface
The maximum normal distance H2 of abutment point must be often controlled within 0.35mm.Therefore, the small light of any complexity is increased
Learning structure all will bring the lifting of greatly trouble and cost to the batch production of fingerprint recognition module, it is impossible to meet volume production
Need.
Meanwhile, existing fingerprint recognition module technology mainly uses capacitance type sensor and radio frequency sensor, manufacture module
Material has strict dielectric or other performance requirements, thus light emitting source can not be placed in the center or top of fingerprint recognition chip
Portion, can be only put at side.In existing structure, the place that uniquely can be used for printing opacity is exactly to use transparent adhesive layer 202, but it is thick
Degree is too thin, effective path of famine light conduction, it is impossible to conduct to its panel the light of light emitting source light-transparent pattern is presented.
The content of the invention
For the drawbacks described above of prior art, the invention solves the problems that the panel of existing fingerprint recognition module can not light, nothing
Method is lit that the problem of specific light-transparent pattern is presented.
The technical solution adopted for the present invention to solve the technical problems is：A kind of fingerprint recognition mould with backlight is provided
Group, including circuit board, the fingerprint recognition chip on the circuit board and loaded on the fingerprint recognition chip upper surface
Panel, the fingerprint recognition chip include encapsulating material and naked core, wherein, also including be connected with the circuit board at least one
Light emitting source；The panel is provided with least one transparent area；The encapsulating material is light transmissive material；What the light emitting source was sent
Light is main light-conductive media with the encapsulating material, and transparent area from the panel is projected after the encapsulating material.
In the present invention, the panel is fitted in the fingerprint recognition chip upper surface, the hair by the adhesive layer of printing opacity
The light that light source is sent transparent area successively after the encapsulating material, adhesive layer from the panel is projected.
In the present invention, the light emitting source is outside the encapsulating material；Or, the light emitting source is together with the naked core
It is packaged in inside the encapsulating material.The light emitting source is luminous mainly towards the transparent area.
In the present invention, the light modulation thing for adjusting illumination effect is additionally provided with following at least one place：In the encapsulation
In material, in the adhesive layer, at the top of the naked core, at the top of the encapsulating material, in the panel light transmission area
Bottom.Wherein, the light modulation thing is fluorescent material；Or can change the direction of propagation of light and/or the microparticle of composition and/or
Micropore.
In the present invention, can also be provided for adjusting the light modulation thing of illumination effect in following at least one place：The encapsulation
The top of material, the top of the naked core, the bottom of the panel；The light modulation thing includes thering is the scattered, fluorescence of diffraction function
Powder, microparticle or micropore.
In the present invention, also non-conductive reflectorized material can be set in following at least one place：It is the top of the naked core, described
The alternatively non-transparent district of panel bottom.
In the present invention, in the direction back to the transparent area of the light emitting source, part also can be set around described luminous
Source is with any one in the high-reflecting film after light is converged mainly towards the transparent area, reflection shield or speculum.
In the present invention, the light emitting source can be it is following any one：Light emitting diode, LED core, laser,
Laser tube core, laser array dice, organic luminescent device, organic light emitting array device.
In the present invention, the transparent area can form enterprise trademark, general identifications or specific light-transparent pattern.
By above technical scheme, the present invention can meet fingerprint recognition requirement simultaneously, using extremely in limited space
A few light emitting source realizes the backlight function of fingerprint recognition module, and can be formed transparent area on its panel as back light
Light-transparent pattern light, and then greatly improve the aesthetic measure and brand identification of fingerprint recognition module.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the structural representation of existing fingerprint recognition module；
Fig. 2 is the side, sectional enlarged diagram of fingerprint recognition module shown in Fig. 1；
Fig. 3 is the decomposing schematic representation of fingerprint recognition module in a preferred embodiment of the invention；
Fig. 4 is the vertical view distribution schematic diagram of light emitting source in fingerprint recognition module shown in Fig. 3；
Fig. 5 is the side, sectional enlarged diagram of fingerprint recognition module shown in Fig. 3；
Fig. 6 is the decomposing schematic representation of fingerprint recognition module in another preferred embodiment of the present invention；
Fig. 7 is the vertical view distribution schematic diagram of light emitting source in fingerprint recognition module shown in Fig. 6；
Fig. 8 is the side, sectional enlarged diagram of fingerprint recognition module shown in Fig. 6；
Fig. 9 is the schematic diagram with fingerprint recognition module in existing smart mobile phone.
Specific embodiment
It is illustrated in figure 3 a preferred embodiment of fingerprint recognition module of the present invention.In the present embodiment, on face 102
Transparent area is provided with, the transparent area can form light-transparent pattern 101.In the existing fingerprint recognition module shown in Fig. 1 due to without saturating
Light function, so usually not this light-transparent pattern 101.The light-transparent pattern 101 can be different shapes, can be specifically enterprise
Industry trade mark, general identifications or other light-transparent patterns.
In the present embodiment, light emitting source 301,302,303,304 is provided with the exterior circumferential of fingerprint recognition chip 203.These
Light emitting source physical connection and is electrically connected to circuit board 104 together with fingerprint recognition chip by way of soldering, and it overlooks effect
As shown in Figure 4.During specific implementation, quantity, the position of light emitting source can as needed make corresponding adjustment.Panel 102 is by viscous
Layer is closed to conform on fingerprint recognition chip 203.And becket 103 then surrounds panel 102 and fingerprint recognition chip 203, while
Also physical connection and it is electrically connected to circuit board 104.
As shown in figure 5, the bottom of panel 102 is coated with black ink region 501 and 502 by way of printing.Black oil
Space is left between ink-covered area domain, or uses transparent ink, to form transparent area, typically specific light-transparent pattern 101.With oil
The panel 102 of ink-covered area domain 501,502 and light-transparent pattern 101 is fitted on fingerprint recognition chip by adhesive layer 202.Fingerprint is known
Other chip is made up of naked core 507 and encapsulating material 508, and in the present embodiment, encapsulating material 508 and adhesive layer 202 are printing opacity material
Material, can be specifically colourless transparent material, or colored transparent material.The light that light emitting source is sent is with encapsulating material 508
Main light-conductive media, and can be projected at the light-transparent pattern 101 after encapsulated material 508, adhesive layer 202 from panel 102.
In the present embodiment, using the encapsulating material of water white transparency, and light modulation thing is mixed into encapsulating material.At other
In embodiment, also light modulation thing can be arranged at the top 504 of encapsulating material or be arranged at the top 505 of naked core 507,
Or it is arranged on the bottom of the transparent area of panel 202；When the bottom of panel 202 is arranged on, light-transparent pattern is mainly covered
Region where 101.
Light emitting source 301,303 is merely illustrated in Fig. 5.During specific implementation, light emitting source 301,303 and unshowned other light
The equal physical connection in source and it is electrically connected on circuit board 104.The top of light emitting source 301,303 is its centre of luminescence.From the angle of light efficiency
Degree considers that the height of its centre of luminescence necessarily be greater than naked core 507, and less than panel bottom 503.Its luminous Main way Ying Ji
This is towards light-transparent pattern 101.
In a preferred embodiment, light emitting source can select blue light-emitting diode, such as group III-nitride luminous two
Pole pipe.Such as light modulation thing can select suitable fluorescent material, and nitride red fluorescent material mainly has two kinds, all be the nitrogen of europium doping
Compound, structural formula can be written as M2xSi5N8:xEu2+(M=Ca, Sr, Ba, wherein 0≤x≤0.4) and CaAlSiN3:Eu2+.Green
Mainly there is Eu at present with yellow nitric oxide fluorescent powder2+,Ce3+,Y2+Etc. rare-earth ion activated Sialon (Sialon) class and
MSiO2N2Two major classes.
In the present invention, light emitting source and light modulation thing can have multiple combination, and those skilled in the art can change described as needed
The species of light emitting source, glow color and wavelength, or change the species of light modulation thing, proportioning, so as to change the hair of the light-transparent pattern
Light effect.It is therein light modulation thing can be fluorescent material, or can change light the direction of propagation and/or composition microparticle and/
Or micropore.For particulate, for the micro optical structure such as micropore, often exist simultaneously the reflection of light, refraction, diffraction, scattering,
Various optical phenomenas such as polarization；As particulate pore size is different, the weighting of these phenomenons is had nothing in common with each other；But all it is after all
Change the direction of propagation and the composition of light.It is exactly that can just see that object is illuminated without being immediately seen light source to change the direction of propagation；Change
It refers to the wavelength and polarization state that can changes composition light to become composition, such as it can be seen that blueness, the sky of red, that leans on is air
Scattering of the particulate to sunlight.
In addition, the bottom of the alternatively non-transparent district in panel 102, the i.e. bottom of ink area 501,502, can also be by coating, print
The modes such as brush, plated film set non-conductive reflectorized material, to improve light efficiency.Furthermore it is also possible to set at the top 505 of naked core not lead
Electric reflectorized material.
As shown in figure 5, in the direction back to light-transparent pattern 101 of light emitting source 301,303, be additionally provided with reflection shield 506,
509, further to improve light efficiency.
Fig. 6 show another preferred embodiment of fingerprint recognition module of the present invention.In the fingerprint recognition module, light
Source 601 is integrated into the inside of fingerprint recognition chip 203.Physics connects by way of soldering together with fingerprint recognition chip 203
Connect and be electrically connected to circuit board 104.Relative position when it is overlooked is as shown in Figure 7.Panel 102 conforms to fingerprint by adhesive layer
On identification chip 203.And becket 103 then surrounds panel 102 and fingerprint recognition chip 203, while also physical connection and electricity
It is connected to circuit board 104.Equally, light-transparent pattern 101 is provided with face 102.
As shown in fig. 7, being packaged with naked core 507, light emitting source 601 in fingerprint recognition chip 203.As long as not influenceing naked core 507
Normal work, during specific implementation, the quantity of light emitting source, position can need be adjusted according to border, however it is not limited to Fig. 6, Fig. 7 institute
The quantity shown and position.
As shown in figure 8, the bottom of panel 102 is coated with black ink region 501 and 502 by way of printing.Black oil
Space is left between ink-covered area domain, or uses transparent ink, to form light-transparent pattern 101.With inked areas 501,502 and printing opacity
The panel 102 of pattern 101 is conformed on fingerprint recognition chip by adhesive layer 202.Fingerprint recognition chip is by naked core 507 and encapsulation
Material 508 is constituted.Meanwhile, light emitting source 601 and other possible not shown light emitting sources are also together encapsulated in encapsulating material 508
Portion.Encapsulating material therein 508 is light transmissive material, can be specifically colourless transparent material, or colored transparent material.
As shown in figure 8, in the direction back to light-transparent pattern 101 of light emitting source 601, reflection shield 901 is additionally provided with, to enter one
Step improves light efficiency.
Claims (10)
1. a kind of fingerprint recognition module with backlight, including circuit board, the fingerprint recognition chip on the circuit board, with
And the panel loaded on the fingerprint recognition chip upper surface, the fingerprint recognition chip include encapsulating material and naked core, its feature
It is,
Also include at least one light emitting source being connected with the circuit board；
The panel is provided with least one transparent area；
The encapsulating material is light transmissive material；
The light that the light emitting source is sent with the encapsulating material be main light-conductive media, and from described after the encapsulating material
Transparent area on panel is projected.
2. the fingerprint recognition module with backlight according to claim 1, it is characterised in that the panel is by printing opacity
Adhesive layer is fitted in the fingerprint recognition chip upper surface, and the light that the light emitting source is sent is successively through the encapsulating material, viscous
Transparent area after conjunction layer from the panel is projected.
3. the fingerprint recognition module with backlight according to claim 2, it is characterised in that
The light emitting source is outside the encapsulating material；
Or, the light emitting source is packaged in inside the encapsulating material together with the naked core.
4. the fingerprint recognition module with backlight according to claim 3, it is characterised in that the light emitting source mainly towards
The transparent area lights.
5. the fingerprint recognition module with backlight according to claim 3, it is characterised in that in following at least one place
It is additionally provided with the light modulation thing for adjusting illumination effect：In the encapsulating material, in the adhesive layer, on the top of the naked core
Portion, in the top of the encapsulating material, the bottom in the panel light transmission area.
6. the fingerprint recognition module with backlight according to claim 5, it is characterised in that
The light modulation thing is fluorescent material；
Or, the light modulation thing is to change the direction of propagation of light and/or the microparticle of composition and/or micropore.
7. the fingerprint recognition module with backlight according to claim 3, it is characterised in that in following at least one place
It is additionally provided with non-conductive reflectorized material：The top of the naked core, the alternatively non-transparent district of the panel bottom.
8. the fingerprint recognition module with backlight according to any one of claim 3-7, it is characterised in that in the hair
The direction back to the transparent area of light source, be additionally provided with part around the light emitting source with after light is converged mainly towards described
Any one in the high-reflecting film in light area, reflection shield or speculum.
9. the fingerprint recognition module with backlight according to any one of claim 1-7, it is characterised in that described luminous
Source for it is following any one：It is light emitting diode, LED core, laser, laser tube core, laser array dice, organic
Luminescent device, organic light emitting array device.
10. the fingerprint recognition module with backlight according to any one of claim 1-7, it is characterised in that described
Light area forms enterprise trademark, general identifications or specific light-transparent pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611140947.8A CN106778598A (en) | 2016-12-12 | 2016-12-12 | Fingerprint recognition module with backlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611140947.8A CN106778598A (en) | 2016-12-12 | 2016-12-12 | Fingerprint recognition module with backlight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106778598A true CN106778598A (en) | 2017-05-31 |
Family
ID=58880279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611140947.8A Pending CN106778598A (en) | 2016-12-12 | 2016-12-12 | Fingerprint recognition module with backlight |
Country Status (1)
| Country | Link |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107644202A (en) * | 2017-09-08 | 2018-01-30 | 维沃移动通信有限公司 | A kind of optical finger print module and mobile terminal |
| WO2018107341A1 (en) * | 2016-12-12 | 2018-06-21 | 红蝶科技(深圳)有限公司 | Fingerprint recognition module for implementing backlight by means of light guide layer |
| CN108875598A (en) * | 2018-05-30 | 2018-11-23 | 京东方科技集团股份有限公司 | A kind of fingerprint recognition component and preparation method thereof, electronic equipment |
| CN110069999A (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 |
| CN110376796A (en) * | 2019-07-31 | 2019-10-25 | 厦门天马微电子有限公司 | A kind of backlight module, its production method and display device |
| CN112106058A (en) * | 2018-05-07 | 2020-12-18 | 光波触控有限公司 | Compact optical sensor for fingerprint detection |
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| CN110069999B (en) * | 2019-03-23 | 2022-03-11 | 深圳阜时科技有限公司 | Display device and electronic equipment |
| CN110376796A (en) * | 2019-07-31 | 2019-10-25 | 厦门天马微电子有限公司 | A kind of backlight module, its production method and display device |
| CN110376796B (en) * | 2019-07-31 | 2022-04-19 | 厦门天马微电子有限公司 | Display device and manufacturing method thereof |
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