CN107229900A - Electronic device and electronic product - Google Patents
Electronic device and electronic product Download PDFInfo
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- CN107229900A CN107229900A CN201710219005.7A CN201710219005A CN107229900A CN 107229900 A CN107229900 A CN 107229900A CN 201710219005 A CN201710219005 A CN 201710219005A CN 107229900 A CN107229900 A CN 107229900A
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- 239000000463 material Substances 0.000 claims description 60
- 239000000758 substrate Substances 0.000 claims description 59
- 230000010287 polarization Effects 0.000 claims description 10
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 6
- 239000002033 PVDF binder Substances 0.000 claims description 5
- 238000002604 ultrasonography Methods 0.000 claims description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims description 4
- 239000004425 Makrolon Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- ZGEYCCHDTIDZAE-BYPYZUCNSA-N L-glutamic acid 5-methyl ester Chemical compound COC(=O)CC[C@H](N)C(O)=O ZGEYCCHDTIDZAE-BYPYZUCNSA-N 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 7
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- 239000010409 thin film Substances 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- MIZLGWKEZAPEFJ-UHFFFAOYSA-N 1,1,2-trifluoroethene Chemical group FC=C(F)F MIZLGWKEZAPEFJ-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229920001038 ethylene copolymer Polymers 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920001621 AMOLED Polymers 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
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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
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1601—Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- 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
- G06V40/1347—Preprocessing; Feature extraction
- G06V40/1359—Extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2200/00—Indexing scheme relating to G06F1/04 - G06F1/32
- G06F2200/16—Indexing scheme relating to G06F1/16 - G06F1/18
- G06F2200/161—Indexing scheme relating to constructional details of the monitor
- G06F2200/1612—Flat panel monitor
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Computer Hardware Design (AREA)
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The present invention provides a kind of electronic device, it includes display module and fingerprint recognition module, the display module includes relative first side and second side, the first side is display surface, first side includes viewing area and non-display area, the fingerprint recognition module is that ultrasonic fingerprint recognizes module, and the fingerprint recognition module is located at the second side of the display module, and partly or entirely corresponds to the viewing area of first side.Ultrasonic fingerprint identification module need not set dedicated button, can effectively improve screen accounting, realize the full frame design of electronic product；Also, ultrasonic fingerprint identification module is not disturbed by oil, dirty, water, so as to ensure more preferably more reliable Consumer's Experience.The present invention also provides a kind of electronic product, and it includes above-mentioned electronic device, can realize full frame design, meet product demand.
Description
【Technical field】
The present invention relates to fingerprint identification technology field, and in particular to a kind of electronic device and electronic product.
【Background technology】
With the development of fingerprint identification technology, it is set to be widely used in electronic product, such as mobile phone, tablet personal computer, gate inhibition
In system, to simplify the operation such as unblock or transaction payment, and it is safe.
Fingerprint identification technology recognizes module frequently with capacitance type fingerprint, and it makes multiple fingerprint electrodes on a silicon substrate, often
Individual fingerprint electrode is as the pole plate of electric capacity, and finger then as another pole plate of electric capacity, utilizes ridge He Gu and the phase of finger streakline
To fingerprint electrode between capacitance difference, generate fingerprint pattern.At present, the electronic product of module is recognized using capacitance type fingerprint
In, capacitance type fingerprint identification module is arranged at the non-display area of electronic product, namely extra openings to house the condenser type
Fingerprint recognition module, screen accounting is limited.
However, with the development and consumption demand of product, the screen for further improving viewing area accounts for rate as popular hair
Exhibition trend, existing electronic product can not meet the growth requirement of product.
【The content of the invention】
To overcome existing technical problem, the present invention provides a kind of electronic device and electronic product.
The present invention is to provide a kind of electronic device to solve a technical scheme of above-mentioned technical problem, including display module and
Fingerprint recognition module, the display module includes relative first side and second side, and the first side is display surface, the
One side includes viewing area and non-display area, and the fingerprint recognition module is that ultrasonic fingerprint recognizes module, and the fingerprint is known
Other module is located at the second side of the display module, and partly or entirely corresponds to the viewing area of first side.
Preferably, the pressure that the fingerprint recognition module includes substrate and is formed at by way of polarization in situ on substrate
Material layer.
Preferably, the material of the piezoelectric material layer is Kynoar, polyvinyl chloride, poly- γ-methyl-Pidolidone
Ester, makrolon or polyvinylidene fluoride copolymer.
Preferably, the thickness of the piezoelectric material layer is less than 30 μm.
Preferably, the piezoelectric constant d of the piezoelectric material layer33For 20-35pC/N.
Preferably, the display module is OLED display modules, LED display modules, Micro-LED display modules or LCD
Display module.
Preferably, the fingerprint recognition module includes two piezoelectric material layers, and two piezoelectric material layers are respectively letter
Number emission layer and signal receiving layer, and it is arranged on the homonymy or heteropleural of substrate；The signal emission layer is used to send ultrasonic wave letter
Number, the signal receiving layer is used to receive the ultrasonic signal returned.
Preferably, the side of the signal receiving layer is provided with electrode, and the both sides of the signal emission layer are equipped with electrode.
Preferably, the fingerprint recognition module includes a piezoelectric material layer being located on substrate, the piezoelectric material layer
Both sides are equipped with electrode, for sending ultrasonic signal and receiving the ultrasonic signal returned.
The present invention also provides a kind of electronic product, and it includes above-mentioned electronic device.
Relative to prior art, electronic device provided by the present invention, including display module and fingerprint recognition module, it is described
Fingerprint recognition module is that ultrasonic fingerprint recognizes module, and partly or entirely corresponds to the viewing area of display module.First, surpass
Sound wave fingerprint recognition module is by sending ultrasonic signal, and receiving the ultrasonic signal returned up to after finger, utilize hand
The difference for the ultrasonic signal that the ridge of fingerprint line and paddy are returned, so as to generate fingerprint pattern, it need not set dedicated button,
It can partly or entirely correspond to the viewing area of display module, screen accounting can be effectively improved, the complete of electronic product is realized
Screen design；Also, ultrasonic fingerprint identification module is not disturbed by oil, dirty, water, so as to ensure more preferably more reliable user's body
Test.
The present invention also provides a kind of electronic product, and it includes above-mentioned electronic device, can realize full frame design, meets product need
Ask.
【Brief description of the drawings】
Fig. 1 is the structural representation of electronic device provided by the present invention.
Fig. 2 is the partial cutaway view schematic in electronic device I-I directions along along Fig. 1 that the embodiment of the present invention one is provided.
Fig. 3 is the enlarged diagram in A portions in Fig. 2.
Fig. 4 is the structure that the embodiment of the present invention one provides the first embodiment of fingerprint recognition module in electronic device
Schematic diagram.
Fig. 5 is the structure for second of embodiment that the embodiment of the present invention one provides fingerprint recognition module in electronic device
Schematic diagram.
Fig. 6 is the structure that the embodiment of the present invention one provides the third embodiment of fingerprint recognition module in electronic device
Schematic diagram.
Fig. 7 is the partial cutaway view schematic in electronic device I-I directions along along Fig. 1 that the embodiment of the present invention two is provided.
Fig. 8 is the enlarged diagram in B portions in Fig. 7.
Fig. 9 is the partial cutaway view schematic in electronic device I-I directions along along Fig. 1 that the embodiment of the present invention three is provided.
Figure 10 is the enlarged diagram in C portions in Fig. 9.
Figure 11 is the knot that the embodiment of the present invention three provides the first embodiment of fingerprint recognition module in electronic device
Structure schematic diagram.
Figure 12 is the knot for second of embodiment that the embodiment of the present invention three provides fingerprint recognition module in electronic device
Structure schematic diagram.
Figure 13 is the partial cutaway view schematic in electronic device I-I directions along along Fig. 1 that the embodiment of the present invention four is provided.
Figure 14 is the partial cutaway view schematic in electronic device I-I directions along along Fig. 1 that the embodiment of the present invention five is provided.
Figure 15 is the enlarged diagram in D portions in Figure 14.
【Embodiment】
In order that the purpose of the present invention, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and embodiment,
The present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
Embodiment one
As shown in figure 1, a kind of electronic device 1, including display module 10, the display module 10 includes first side 101,
The first side 101 is display surface, and first side 101 includes viewing area 111 and non-display area 112.Also referring to
Fig. 2, the display module 10 also includes the second side 102 relative with first side 101, and the electronic device 1 also includes referring to
Line recognizes module 20, and the fingerprint recognition module 20 is located at the second side 102 of the display module 10, and partly or entirely correspondence
In the viewing area 111 of first side 101.The fingerprint recognition module 20 is that ultrasonic fingerprint recognizes module.
First, recognize module, it is necessary to which finger directly contacts to be used as electric capacity using capacitance type fingerprint in the prior art
Another pole plate, thus a region must be separately provided be used to house capacitance type fingerprint identification module, and exposed to electronics
On product.And ultrasonic fingerprint of the present invention identification module is, by sending ultrasonic signal, and to receive up to finger
The ultrasonic signal returned afterwards, the difference of the ultrasonic signal returned using the ridge and paddy of finger streakline, so as to generate fingerprint
Pattern.Namely directly contacted with ultrasonic fingerprint identification module without finger, it need not set dedicated button, namely can part
Or all correspond to the viewing area of display module, screen accounting can be effectively improved, realize the full frame design of electronic product.
Also, ultrasonic signal has penetrability, and ultrasonic fingerprint identification module is not disturbed by oil, dirty, water, so as to protect
The more preferable more reliable Consumer's Experience of card.In addition, existing display module is with touch controllable function, that is, complete fingerprint recognition
After unblock, anyone can be carried out using, and there are safety risks；Electronic device provided by the present invention, due to fingerprint
Recognize that module 20 partly or entirely corresponds to viewing area, thus fingerprint recognition can be carried out during user's use, to sentence
Whether the disconnected user possesses access right, effectively improves security.
The display module 10 can be OLED display modules, LED display modules, Micro-LED display modules or LCD aobvious
Show module.Wherein Micro-LED display modules have the advantages that miniaturization, filming, array, and its volume is about that LED is shown
The 1% of module；And each pixel can addressing, be operated alone it is luminous；In addition the energy consumption of Micro-LED display modules is low, bright
Degree and high resolution.It is shown in this embodiment for LCD display modules, it is its contact panel 11 for including setting gradually, aobvious
Show substrate 12 and liquid crystal layer 13, side of the contact panel 11 away from display base plate 12 or liquid crystal layer 13 is display surface.
Also referring to Fig. 3, the fingerprint recognition module 20 includes substrate 22 and piezoelectric material layer.The substrate 22 is used for
The piezoelectric material layer is carried, and directly or indirectly provides electric signal for piezoelectric material layer, and receives piezoelectric material layer and is produced
Electric signal.In general, the substrate 22 is TFT substrate, and TFT substrate refers to being provided with TFT base material, in general
TFT is set for array, and base material is glass baseplate.When the substrate 22 applies electric signal, the piezoelectric material layer is due to inverse pressure
Electrical effect produces ultrasonic signal；When piezoelectric material layer receives the ultrasonic signal of return, because piezo-electric effect produces electricity
Signal, so as to form fingerprint pattern.
The material of the piezoelectric material layer is Kynoar, polyvinyl chloride, poly-γ-methyl-L-glutamate, poly- carbon
Acid esters or polyvinylidene fluoride copolymer, with excellent piezo-electric effect.Preferably, in some embodiments of the invention, institute
The copolymer for stating the material selection Kynoar of piezoelectric material layer is Kynoar-trifluoro-ethylene copolymer, in order to obtain
The preferable piezoelectric layer 120 of piezo-electric effect, the scope of the mass ratio of the Kynoar and trifluoro-ethylene is (60-95)：(5-
30), it is preferable that the scope of its mass ratio is (75-86)：(15-25), it is further preferred that its mass ratio is 80：20, it is described
Kynoar and trifluoro-ethylene copolymer more individually can reduce cost from Kynoar, and it also has preferable piezoelectricity
Effect.
In this embodiment, the fingerprint recognition module 20 includes two piezoelectrics for being located at the opposite sides of substrate 22
Layer, two piezoelectric material layers are respectively signal emission layer 23 and signal receiving layer 21, and the signal emission layer 23 is used to send out
Go out ultrasonic signal, the signal receiving layer 21 is used to receive the ultrasonic signal returned.
The signal receiving layer 21 can be located at substrate 22 close to the side of display module 10 or positioned at base
Plate 22 is away from the side of display module 10.The ultrasonic signal that the signal emission layer 23 is sent reaches finger surface, through anti-
Return and received by the signal receiving layer 21 after penetrating, due to the difference of finger ridge and paddy, the ultrasonic signal returned after reflection
Intensity is different, so as to form corresponding fingerprint pattern.Specifically, the position of the ridge for finger, reaches the ultrasound of finger surface
Ripple signal is most of to pass through finger, and the ultrasonic signal strength returned after reflection is small；For the position of the paddy of finger, due to
There is air between finger surface and display surface, the ultrasonic signal sent via signal emission layer 23 can largely be reflected,
The ultrasonic signal strength returned after reflection is big.
Preferably it is that the signal receiving layer 21 is located at substrate 22 close to the side of display module 10, can preferably connect
The ultrasonic signal returned is received, the accuracy of fingerprint recognition is improved.
As shown in Figure 3, the side of the signal receiving layer 21 is provided with electrode, i.e. the first receiving electrode 211；The signal
The both sides of emission layer 23 are equipped with electrode, i.e., first, which sends electrode 231 and second, sends electrode 232.Described first sends electrode
231 and second send electrode 232 for applying driving voltage to signal emission layer 23, and driving voltage is 80-120V；Described first
Receiving electrode 211 is used for electric signal produced by induced signal receiving layer 21, and its induction precision is 1-4mV.In certain embodiments,
The both sides of the signal receiving layer 21 are equipped with electrode.
It is preferred that, the piezoelectric material layer is to be formed at by way of the polarization of original position on the substrate 22.Original position polarization
Refer to piezoelectric being formed in situ on the substrate 22, and polarized, it includes but is not limited to general common plating
Film mode is formed, such as chemical vapour deposition technique, physical vaporous deposition, dip-coating, coating etc..First, using original position polarization
Mode, which is avoided that, causes damage to substrate 22, and yield high yield quality is good.Secondly, the piezoelectric material layer thickness formed is small, its
Thickness is less than 30 μm, can preferably meet the lightening demand of product；Wherein preferably using plasma polarization (specifically may be used
Referring to the Chinese patent application of Application No. 201710108374.9) or X-ray polarization (for details, reference can be made to Application No.
201611222575.3 Chinese patent application) mode form the piezoelectric material layer, its thickness can be further reduced to 9 μm
Below.Further, the piezoelectric material layer piezoelectric constant d formed33Height, higher piezoelectric constant d33It can preferably ensure that signal is produced
Raw accuracy, that is, effectively improve the accuracy of formed fingerprint pattern, its piezoelectric constant d3320-35pC/N can be reached.
Further, since fingerprint recognition module 20 is arranged on to the second side 102 of display module 10, its ultrasonic wave for sending or receiving letter
Number display module 10 is needed guiding through, in general it may also be desirable to through glass cover-plate (not shown) for protection etc., therefore
If the penetrability of piezoelectric material layer is bad, the accuracy of its identification of strong influence；Because piezoelectric material layer is by original position
What the mode of polarization was formed so that the ultrasonic fingerprint identification module in the present invention has excellent penetrability, can penetration thickness
For 300-1100 μm；Therefore the glass cover-plate thickness of protection can be accordingly increased, effectively to extend making for the electronic device 1
Use the life-span.
Three kinds of embodiments of the fingerprint recognition module 20 are also provided in this embodiment.
The first embodiment
Referring to Fig. 4, the fingerprint recognition module 20 also includes circuit board 27, the substrate 22 is provided with first substrate line
Road 221 and second substrate circuit 222, the first substrate circuit 221 and second substrate circuit 222 electrically conduct, the circuit
Plate 27 electrically conducts with second substrate circuit 222.The electric signal that the signal receiving layer 221 is formed is along first substrate circuit
221st, second substrate circuit 222, the order of circuit board 27 are transmitted, and required fingerprint image is can obtain by analyzing electric signal
Picture.In general, output signal circuit 28 also can be set in the circuit board 27, by electric signal transmission a to signal processor (figure
Do not show).The circuit board 27 is typically from flexible PCB (FPC, Flexible Printed Circuit).It is appreciated that
The electric signal directly can also be transmitted by lead.
Second of embodiment
Referring to Fig. 5, the difference with the first embodiment in second of embodiment is：The second substrate line
Road 222 and the output signal circuit 28 are located at the relative both sides of substrate 22.It therefore, it can in different product demands, specifically
Refer under different circuit lead demands, carry out corresponding selection set-up mode.As shown in FIG., circuit board 27 can be around
Cross the substrate 22 to set, can also be and realized by other modes such as perforation certainly.In this embodiment it is preferred that, institute
Stating fingerprint recognition module 20 also includes bearing bed 26, the other elements for carrying fingerprint recognition module 20.
The third embodiment
Referring to Fig. 6, the difference with second of embodiment in the third embodiment is：The substrate 22 is
TFT substrate, i.e., described substrate 22 includes the first substrate circuit 221 formed by multiple thin film transistor (TFT)s, in general multiple thin
Film transistor is distributed in array-like, that is, equivalent to multiple pixels, is respectively induced the electric signal of each position.
Embodiment two
Also referring to Fig. 1, Fig. 7 and Fig. 8, a kind of electronic device 1, the difference of the embodiment and embodiment one is：Institute
State signal emission layer 23 and signal receiving layer 21 is arranged on the homonymy of substrate.Wherein it is preferred that the signal receiving layer 21 with
The distance between described display module 10 is less than the distance between the signal emission layer 23 and described display module 10, that is,
Signal emission layer 23 is compared to the signal receiving layer 21 closer to the substrate 23.The ultrasonic wave of return can preferably be received
Signal, improves the accuracy of fingerprint recognition.
Embodiment three
Also referring to Fig. 1, Fig. 9, a kind of electronic device 1, the difference of the embodiment and embodiment one is：The fingerprint
Recognize that module 20 includes a piezoelectric material layer being located on substrate 22, the piezoelectric material layer is signal transmitting layer 24, signal
Transport layer 24 is used to send ultrasonic signal and receives the ultrasonic signal returned.Also referring to Figure 10, the signal transmission
The both sides of layer 24 are equipped with electrode, i.e. the first transmission electrode 241 and the second transmission electrode 242.
One piezoelectric material layer is only set in this embodiment, can further reduce the thickness of the fingerprint recognition module 20,
Also the thickness of the electronic device 1 just can further be reduced.When only setting a piezoelectric material layer, Time-sharing control can be passed through
Mode, i.e., send ultrasonic signal and received ultrasonic signal at times, you can realizes fingerprint identification function；Or can also be same
When control, that is, be simultaneously emitted by ultrasonic signal and received ultrasonic signal, it is possible to understand that the ultrasonic signal now returned is being returned
Interfered during returning between meeting and the ultrasonic signal that is sent or diffraction etc. is, it is necessary to ultrasonic signal to finally receiving
Intensity and/or waveform analyzed, so as to realize fingerprint identification function.Therefore in contrast, Time-sharing control is more multiple in itself
It is miscellaneous, but the relatively simple of received ultrasonic signal is being analyzed, it can be selected according to actual conditions.
Two kinds of embodiments of the fingerprint recognition module 20 are also provided in this embodiment.
The first embodiment
Figure 11 is referred to, the fingerprint recognition module 20 also includes circuit board 27, and the substrate 22 is provided with first substrate
Circuit 221 and second substrate circuit 222, the first substrate circuit 221 and second substrate circuit 222 electrically conduct, the electricity
Road plate 27 electrically conducts with second substrate circuit 222.The electric signal that the signal receiving layer 221 is formed is along first substrate circuit
221st, second substrate circuit 222, the order of circuit board 27 are transmitted, and required fingerprint image is can obtain by analyzing electric signal
Picture.In general, output signal circuit 28 also can be set in the circuit board 27, by electric signal transmission a to signal processor (figure
Do not show).The circuit board 27 is typically from flexible PCB (FPC, Flexible Printed Circuit).It is appreciated that
The electric signal directly can also be transmitted by lead.
Second of embodiment
Figure 12 is referred to, the difference with second of embodiment in the third embodiment is：The substrate 22 is
TFT substrate, i.e., described substrate 22 includes the first substrate circuit 221 formed by multiple thin film transistor (TFT)s, in general multiple thin
Film transistor is distributed in array-like, that is, equivalent to multiple pixels, is respectively induced the electric signal of each position.
In addition, the second substrate circuit 222 can certainly be made to be located at the phase of substrate 22 with the output signal circuit 28
To both sides, it specifically can refer to second of embodiment in embodiment one, will not be repeated here.
Example IV
Also referring to Fig. 1 and Figure 13, a kind of electronic device 1, the difference of the embodiment and embodiment one is：It is described aobvious
It is OLED display modules to show module 10, and it includes contact panel 11 and organic electro luminescent layer 16.
Piezoelectric material layer is macromolecule membrane, is specifically that polyvinylidene difluoride film or polyvinylidene fluoride copolymer are thin
Film.In embodiment one, using LED display modules or LCD display modules, its display base plate 12 is frequently with glass, therefore piezoelectricity
The acoustic impedance values difference of the acoustic impedance values of material layer and display base plate 12 is larger, and loss is higher when signal is transmitted；And in the implementation
Example in, in OLED display modules organic electro luminescent layer 16 use organic material, the acoustic impedance values of piezoelectric material layer with it is organic
The acoustic impedance values of electroluminescence layer 16 are approached, i.e., difference is smaller, so can effectively reduce loss during signal transmission, especially
When needing by multiple interfaces, loss can be reduced well.Therefore, using OLED display modules electronic device 1 fingerprint
Identification accuracy is more preferable.
Wherein, OLED display modules can be AMOLED display modules or PMOLED display modules.
Embodiment five
Also referring to Fig. 1, Figure 14 and Figure 15, a kind of electronic device 1, the difference of the embodiment and embodiment one is：
The fingerprint recognition module 20 also includes reflecting layer 29, and the reflecting layer 29 is to the ultrasonic wave that sends the piezoelectric material layer
Signal reflex returns to piezoelectric material layer.Signal emission layer 23 and signal receiving layer 21 are included with piezoelectric material layer in this embodiment
Exemplified by, it will be understood that side of the ultrasonic signal along the signal emission layer 23 is sent, and the reflecting layer 29 can be as
Shown in Figure 14 and Figure 15 is planted, the emission layer 29 is arranged on the side of the signal emission layer 23 away from transmission signal；And/or institute
State emission layer 29 and be arranged on the signal emission layer 23 side (not shown) adjacent with the side of transmission signal.The reflecting layer
29 either strengthen ultrasonic signal to reflectance ultrasound ripple signal again, to improve the ultrasonic fingerprint identification module 20
Sensitivity.
It is appreciated that when piezoelectric material layer includes signal transmitting layer 24, the emission layer 29 is arranged on institute's signal transmission
24 side away from transmission signal of layer；And/or the emission layer 29 is arranged on the one of the signal transmitting layer 24 and transmission signal
The adjacent side in side.
Embodiment six
A kind of electronic product (not shown), it includes above-mentioned electronic device 1, i.e., including the institute of embodiment one, two, three, four
The electronic device 1 of offer.The electronic product can be mobile phone, tablet personal computer, gate control system etc..First, the electronic product
Full frame design can be realized, product demand is met.Secondly, more preferably more reliable Consumer's Experience can be provided.In addition, the electronic product is pacified
Good perfection.
Compared with prior art, a kind of electronic device provided by the present invention, including display module and fingerprint recognition module,
The display module includes relative first side and second side, and the first side is display surface, and first side includes aobvious
Show region and non-display area, the fingerprint recognition module is that ultrasonic fingerprint recognizes module, and the fingerprint recognition module is located at institute
The second side of display module is stated, and partly or entirely corresponds to the viewing area of first side.First, ultrasonic fingerprint is recognized
Module be by sending ultrasonic signal, and receiving the ultrasonic signal returned up to after finger, using finger streakline ridge and
The difference for the ultrasonic signal that paddy is returned, so as to generate fingerprint pattern, it need not set dedicated button, namely can part or
The viewing area of display module is all corresponded to, screen accounting can be effectively improved, the full frame design of electronic product is realized；Also,
Ultrasonic fingerprint identification module is not disturbed by oil, dirty, water, so as to ensure more preferably more reliable Consumer's Experience.
It is further that the fingerprint recognition module includes substrate and is formed at by way of the polarization of original position on substrate
Piezoelectric material layer.First, it is avoided that by the way of the polarization of original position and damage is caused to substrate, yield high yield quality is good.Its
Secondary, the piezoelectric material layer thickness formed is small, can preferably meet the lightening demand of product；Further, the piezoresistive material formed
Bed of material piezoelectric constant d33Height, higher piezoelectric constant d33The accuracy of the more preferable signal of energy, that is, effectively improve formed fingerprint
The accuracy of pattern so that the present invention in ultrasonic fingerprint identification module there is excellent penetrability, can penetration thickness be
300-1100μm。
It is further that the material of the piezoelectric material layer is Kynoar, polyvinyl chloride, poly- γ-methyl-L- paddy
Propylhomoserin ester, makrolon or polyvinylidene fluoride copolymer, with excellent piezo-electric effect.
It is further that the thickness of the piezoelectric material layer is less than 30 μm, and the lightening demand of product can be met well.
It is further, the piezoelectric constant d of the piezoelectric material layer33For 20-35pC/N, it can ensure that signal is produced well
Accuracy, that is, effectively improve the accuracy of formed fingerprint pattern.
Be further, the display module be OLED display modules, LED display modules, Micro-LED display modules or
LCD display modules.Wherein, preferably it is OLED display modules or Micro-LED display modules；OLED display modules can be effective
Loss during signal transmission is reduced, especially when needing by multiple interfaces, loss can be reduced well；Micro-LED shows
Show that module has the advantages that miniaturization, filming, array, its volume is about the 1% of LED display modules；And each pixel
Can addressing, be operated alone it is luminous；In addition the energy consumption of Micro-LED display modules is low, brightness and high resolution.
It is further that the fingerprint recognition module includes two piezoelectric material layers, two piezoelectric material layer difference
For signal emission layer and signal receiving layer, and it is arranged on the homonymy or heteropleural of substrate；The signal emission layer is used to send ultrasound
Ripple signal, the signal receiving layer is used to receive the ultrasonic signal returned.Two piezoelectric material layers are respectively used to send ultrasound
Ripple signal and received ultrasonic signal, independence are not interfere with each other well, the analysis after generation, reception and the reception of ultrasonic signal
Relatively simple convenience.It is further that the side of the signal receiving layer is provided with electrode, and the both sides of the signal emission layer are equal
Provided with electrode.
It is further that the fingerprint recognition module includes a piezoelectric material layer being located on substrate, the piezoelectric
The both sides of layer are equipped with electrode, for sending ultrasonic signal and receiving the ultrasonic signal returned.Due to only setting a piezoelectricity
Material layer, can further reduce the thickness of the fingerprint recognition module, also just can further reduce the thickness of the electronic device.
The present invention also provides a kind of electronic product, and it includes above-mentioned electronic device.The electronic product can realize full frame set
Meter, meets product demand.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all originals in the present invention
Any modification made within then, equivalent substitution and improvement etc. all should be comprising within protection scope of the present invention.
Claims (10)
1. a kind of electronic device, including display module and fingerprint recognition module, the display module include relative first side
And second side, the first side is display surface, and first side includes viewing area and non-display area, it is characterised in that：
The fingerprint recognition module is that ultrasonic fingerprint recognizes module, and the fingerprint recognition module is located at the second side of the display module
Face, and partly or entirely correspond to the viewing area of first side.
2. electronic device as described in the appended claim 1, it is characterised in that：The fingerprint recognition module includes substrate and passes through original
The mode of bit polarization is formed at the piezoelectric material layer on substrate.
3. electronic device as stated in claim 2, it is characterised in that：The material of the piezoelectric material layer be Kynoar,
Polyvinyl chloride, poly-γ-methyl-L-glutamate, makrolon or polyvinylidene fluoride copolymer.
4. electronic device as claimed in claim 3, it is characterised in that：The thickness of the piezoelectric material layer is less than 30 μm.
5. electronic device as claimed in claim 3, it is characterised in that：The piezoelectric constant d of the piezoelectric material layer33For 20-
35pC/N。
6. electronic device as claimed in claim 3, it is characterised in that：The display module is OLED display modules, LED is shown
Module, Micro-LED display modules or LCD display modules.
7. electronic device as stated in claim 2, it is characterised in that：The fingerprint recognition module includes two piezoelectrics
Layer, two piezoelectric material layers are respectively signal emission layer and signal receiving layer, and are arranged on the homonymy or heteropleural of substrate；Institute
Stating signal emission layer is used to send ultrasonic signal, and the signal receiving layer is used to receive the ultrasonic signal returned.
8. electronic device as recited in claim 7, it is characterised in that：The side of the signal receiving layer is provided with electrode, described
The both sides of signal emission layer are equipped with electrode.
9. electronic device as stated in claim 2, it is characterised in that：The fingerprint recognition module includes one and is located on substrate
Piezoelectric material layer, the both sides of the piezoelectric material layer are equipped with electrode, for sending ultrasonic signal and receiving the ultrasound returned
Ripple signal.
10. a kind of electronic product, it is characterised in that：Including the electronic device as described in claim any one of 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219005.7A CN107229900A (en) | 2017-04-05 | 2017-04-05 | Electronic device and electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219005.7A CN107229900A (en) | 2017-04-05 | 2017-04-05 | Electronic device and electronic product |
Publications (1)
| Publication Number | Publication Date |
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| CN107229900A true CN107229900A (en) | 2017-10-03 |
Family
ID=59934485
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710219005.7A Withdrawn CN107229900A (en) | 2017-04-05 | 2017-04-05 | Electronic device and electronic product |
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| Country | Link |
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| CN (1) | CN107229900A (en) |
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Application publication date: 20171003 |