CN207516966U - Display module and electronic equipment - Google Patents
Display module and electronic equipment Download PDFInfo
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- CN207516966U CN207516966U CN201721309151.0U CN201721309151U CN207516966U CN 207516966 U CN207516966 U CN 207516966U CN 201721309151 U CN201721309151 U CN 201721309151U CN 207516966 U CN207516966 U CN 207516966U
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Abstract
The utility model is related to fingerprint identification technology field more particularly to a kind of display module and electronic equipments.The display module includes the folded identification module and display module set, the identification module be arranged on display module for display side, the identification module includes first electrode layer, piezoelectric layer, the second electrode lay, the first electrode layer and the second electrode lay are separately positioned on two opposite surfaces of piezoelectric layer, at least one both described first electrode layer and the second electrode lay are multiple electrodes block, the multiple electrode block array arrangement on the surface of piezoelectric layer, the first electrode layer be fixed on display module for display side.Electronic equipment employs above-mentioned display module.The display module and electronic equipment have the advantages that simple in structure.
Description
【Technical field】
The utility model is related to fingerprint identification technology field more particularly to a kind of display module and electronic equipments.
【Background technology】
At present, fingerprint identification technology such as has been widely used in mobile terminal, smart home, has fought crime at the multiple fields.
Many facility and safety are brought to people’s lives.The fingerprint identification technology of present mainstream has light fingerprint recognition, condenser type
Fingerprint recognition and ultrasonic fingerprint identification, but they also have the shortcomings that respective, such as light fingerprint recognition and capacitance type fingerprint are known
There are not greasy dirt, dust in finger, water when substances is easy for that fingerprint image can not be parsed；And ultrasonic fingerprint identification is for answering
It is less high with the requirement of environment, therefore ultrasonic fingerprint identification is used widely.
But the structure of existing display module is all sufficiently complex, integrated level is relatively low！
【Utility model content】
The technical issues of to overcome existing display module complicated, the utility model provide a kind of display module and
Electronic equipment.
The scheme that the utility model solves technical problem is to provide a kind of display module, including the folded identification mould set
Block and display module, the identification module be arranged on display module for display side, it is electric that the identification module includes first
Pole layer, piezoelectric layer, the second electrode lay, the first electrode layer and the second electrode lay are separately positioned on two opposite tables of piezoelectric layer
On face, at least one both described first electrode layer and the second electrode lay are multiple electrodes block, the multiple electrode block array row
Cloth on the surface of piezoelectric layer, the first electrode layer be fixed on display module for display side.
Preferably, the display module includes viewing area and non-display area for the side of display, and the identification module is extremely
Few covering part viewing area.
Preferably, the display module further includes circuit board, and the circuit board is arranged on display module far from identification module
Side, the circuit board and first electrode layer, the second electrode lay are electrically connected.
Preferably, the piezoelectric layer is polarized ferroelectric polymer film in situ.
Preferably, the first electrode layer, piezoelectric layer, the second electrode lay are transparent material.
Preferably, the display module further includes control module, and the circuit board and control module are electrically connected, the control
Molding block is located at side of the display module far from identification module.
Preferably, the circuit board is electrically connected with display module, the work of institute's control module driving display module.
Preferably, the circuit board is flexible PCB.
Preferably, the thickness of first piezoelectric layer is less than 30 μm.
The utility model also provides a kind of electronic equipment, which employs above-mentioned display module.
Compared with prior art, the display module of the utility model includes identification module and display module, the identification mould
Block be arranged on display module for display side, the identification module include first electrode layer, piezoelectric layer, the second electrode lay,
The first electrode layer and the second electrode lay are separately positioned on two opposite surfaces of piezoelectric layer, the first electrode layer and
At least one both two electrode layers are multiple electrodes block, and the multiple electrode block array arrangement is described on the surface of piezoelectric layer
First electrode layer be fixed on display module for display side, display module is not only with simple in structure, high excellent of reliability
Point is more in line with the trend that electronic equipment is lightening, integrated level is high, and identification module leans on the finger of person of modern times, and accuracy of identification is more
Add accurate.
The display module of the utility model includes viewing area and non-display area for the side of display, and the identification module is extremely
Few covering part viewing area so as to which display module can make comprehensive screen, can carry out full frame fingerprint recognition, touch-control identification and pressure
Detection, it is vdiverse in function.
The piezoelectric layer of the utility model is polarized ferroelectric polymer film in situ, and piezoelectric layer thickness is thin, more meets frivolous
The demand of change.
The circuit board of the utility model is electrically connected with display module, and the work of institute's control module driving display module is shown
Show that the integrated level of module further improves.
The circuit board of the utility model is flexible PCB, and flexible PCB can arbitrarily be bent, and the shape of display module is fitted
Answering property further enhances.
The electronic equipment of the utility model include above-mentioned display module, the electronic equipment not only have it is simple in structure, can
By property it is high the advantages of, be more in line with the trend that electronic equipment is lightening, integrated level is high, and identification module leans on the finger of person of modern times,
Accuracy of identification is more accurate.
【Description of the drawings】
Figure 1A is the structure diagram of the utility model display module.
Figure 1B is the structure diagram of the utility model identification module.
Fig. 1 C are a kind of the utility model identification structure diagrams of deformation of module.
Fig. 2 is the structure diagram of another embodiment of the utility model display module.
Fig. 3 is the structure diagram of the another embodiment of the utility model display module.
Fig. 4 is a kind of structure diagram of deformation of Fig. 3 display modules.
【Specific embodiment】
In order to make the purpose of this utility model, technical solution and advantage are more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only used to solve
The utility model is released, is not used to limit the utility model.
First embodiment
A, 1B and 1C are please referred to Fig.1, the first embodiment of the utility model provides a kind of display module 1, the display module 1
Including identification module 11, cover board 16, control module 12, circuit board 13, discrete device 14, connector 15 and display module 17.It is aobvious
Show module 17 for display side be display side, identification module 11 and 17 lamination of display module are set, and identification module 11 is fixed
In the display side of display module 17.Cover board 16 is arranged on identification module 11 and positioned at identification module 11 far from display module 17
Side, and cover board 16 all covers identification module 11.Side of the cover board 16 far from identification module is touch-control side, is touched for finger
Control.Circuit board 13 and control module 12 are electrically connected, circuit board 13 also and identification module 11, display module 17, discrete device 14,
Connector 15 is electrically connected.Circuit board 13, control module 12, discrete device 14, that connector 15 is all located at display module 17 is separate
The side of identification module 11, the control module 12 can drive the display module 17 to work.Circuit board 13, control module 12,
Discrete device 14, connector 15 are fixed together or separate with display module 17 respectively.Identification module 11 can sense
The pressing of finger, pressing signal transmission to control module 12, the pressure that control module 12 is learnt the position of pressing and is subject to is big
It is small；Circuit board 13 provides voltage to identification module 11, and identification module 11 emits ultrasonic wave, and finger is placed on the touch-control of cover board 16
Side, ultrasonic wave encounter finger, and ultrasonic wave returns, and control module 12 stops providing electric energy, identification module for identification module 11 at this time
11, which sense ultrasonic wave, generates electric signal, and control module 12 identifies fingerprint or position detection according to the electric signal of reception.
Since the good directionality and penetration capacity of ultrasonic wave are strong, using ultrasonic wave, can make identification module 11 detect compared with
The ultrasonic signal of concentration, in order to the identification of fingerprint and touch location.It is of course also possible to as needed using other frequencies
Acoustic signals.
Display module 17 is preferably OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) displays
Screen or TFT (Thin Film Transistor, thin film transistor (TFT)) liquid crystal display.The display side of display module 17 includes viewing area
(not shown) and non-display area (not shown).Viewing area is the region that display module 17 can be shown.The display mould of the present embodiment
Block 17 is not provided with chip, and display module 17 is electrically connected by circuit board 13 and control module 12, direct by control module 12
The work of display module 17 is driven, there are one control modules 12 for display module 1, save cost, integrated level further improves.
It is appreciated that chip, the work of chip controls display module 17 can also be separately provided in display module 17.
Identification module 11 includes first electrode layer 111, piezoelectric layer 113 and the second electrode lay 115,111 He of first electrode layer
The second electrode lay 115 is separately positioned on two opposite surfaces of piezoelectric layer 113, and first electrode layer 111 is fixed on display module
17 side for showing, and at least covering part viewing area of identification module 11.Preferably, identification module 11 covers whole displays
Area and part non-display area, i.e. identification module 11 are suitable with the size of display module 17.Identification module 11 includes Touch Zone and non-
Touch Zone.It is appreciated that technical term or scientific terminology that the utility model uses should be the utility model fields
The ordinary meaning that the interior personage with general technical ability is understood.It is " first " that is used in the utility model, " second " and similar
Word be not offered as any sequence, quantity or importance, and be used only to distinguish different component parts.
The second electrode lay 115 is multiple electrodes block, and multiple electrodes block array is intervally arranged on the surface of piezoelectric layer 113.
Material of the electrode block for electrically conducting transparent, such as tin indium oxide, the metal oxide of indium gallium zinc electrically conducting transparent.The second electrode lay
115 do not interfere the display of display module 17, and the luminous energy of display module 17 passes through the second electrode lay 115.Due to the one of finger
The width in a paddy ridge period is usually 300um, and the clarity of the fingerprint of identification is advantageously ensured that by the size for setting electrode block,
So that it is guaranteed that the accuracy of fingerprint recognition.Preferably, the area of the electrode block is less than or equal to 70 μm * 70 μm, further
Preferably less than or equal to 60 μm * 60 μm, still more preferably 40 μm * 40 μm, the size of electrode block within this range when,
Fingerprint recognition best results.
First electrode layer 111 is a nonwoven fabric from filaments, and first electrode layer 111 selects the material of electrically conducting transparent, such as tin indium oxide, oxygen
Change the metal oxide of the electrically conducting transparents such as indium gallium zinc.It is appreciated that first electrode layer 111 or multiple electrodes block, knot
Structure is consistent with above-mentioned 115 structure of the second electrode lay.Preferably, both first electrode layer 111 and the second electrode lay 115 at least it
One is multiple electrodes block.When first electrode layer 111 and the second electrode lay 115 are all electrode block, the electrode of first electrode layer 111
Size, the position consistency of the electrode block of the size of block, position and the second electrode lay 115.
Piezoelectric layer 113 is piezoelectric film, it is preferred that piezoelectric layer 113 is ferroelectric polymer film, in a specific embodiment
In, the ferroelectric polymer film is by purchasing existing ferroelectric polymer film finished product, then again by being adhered to second
It is obtained on electrode layer 115 to be polarized.In general, the ferroelectric polymer film of this finished product needs first to be drawn high with certain
Then stress is polarized again by being bonded in substrate again, the ferroelectric polymer film thickness that such method is formed is at 30 μm
More than, the frivolous development trend of existing electronic device is not suitable with, and using the detection module of this polarized film, due to voltage inductance
It is too thick to survey film, therefore resolution ratio is relatively low.Ferroelectric polymer film polarization method in the above embodiment is mostly directly in iron
High voltage electric field is set to carry out between the upper and lower surface of electric polymer film, but because ferroelectric polymer film thickness itself
Unevenness, it is possible that easily being punctured by high-voltage electricity place, the production qualification rate of piezoelectric film 113 is very low, is unfavorable for extensive life
Production, and the piezoelectric effect of piezoelectric film obtained 113 is poor, and service life is shorter.
In another specific embodiment, the piezoelectric layer 113 of the utility model is preferably the ferroelectricity that polarization in situ is formed
Thin polymer film, specially described piezoelectric layer 113 are to be formed in situ pressure in the one side of the cover board 16 with the second electrode lay 115
Electrolemma 113, the piezoelectric film 113 include opposite first surface and second surface, and the first surface is close to cover board 16
One side, the second surface be close to first electrode layer 111 surface.When polarization, make the first surface of the piezoelectric film 113
Potential is zero；Side provides the first electric field and the second electric field, the potential of the first electric field where the second surface of the piezoelectric film 113
Higher than the potential of the second electric field；The ring of the side where 113 second surface of piezoelectric film is ionized under the action of the first electric field
Border gas, the environmental gas pass through the second electric field and are gathered in the second surface of piezoelectric film 113, make shape in the piezoelectric film 113
Into the film internal electric field along film thickness direction, polarization is carried out to the piezoelectric film 113 and forms the piezoelectric layer 113.It can manage
Solution, the ferroelectric polymer film are formed in the second electrode lay by chemical vapor deposition, the wet chemical methods such as coating, dip-coating
115 surfaces, therefore very thin thickness and uniform ferroelectric polymer film can be formed, thickness can be less than 30 μm, it is preferred that thick
Degree can maintain 9 μm hereinafter, so as to reduce the transmission loss of signal, and formation process is simple, moreover, being formed in situ using this
Polarized film detection module 11, resolution ratio greatly improves.The thickness of the piezoelectric layer 113 may further be less than 9 μm, then into
One step, thickness can be 1.5-7.4 μm, 1.9-7.2 μm, 2.2-8.6 μm, 2.8-8.4 μm or 3.6-6.6 μm, more into one
Step ground can be specifically 1.8 μm, 2.4 μm, 2.6 μm, 3.7 μm, 3.9 μm, 4.2 μm, 4.6 μm, 5.6 μm, 5.8 μm, 6.7 μm,
8.6μm、8.7μm。
Furthermore the utility model sets polarization of electrode method compared to directly in the upper and lower surface of piezoelectric layer 113, above-mentioned
Virtual polarization method will not make piezoelectric layer 113 directly bear applied high voltage electric field, be avoided that piezoelectric layer 113 is breakdown.Tool
Body, ion body polarization (for details, reference can be made to the Chinese patent application application No. is 201710108374.9) can be used in above-mentioned polarization
Or the mode of X ray polarization (for details, reference can be made to the Chinese patent application application No. is 201611222575.3) forms the pressure
Electric layer, the piezoelectric layer 113 formed can accomplish it is very thin, moreover, the piezoelectric effect of the piezoelectric layer 113 of the utility model preferably with
And service life is long, can be good at being useful in identification module 11, conducive to 11 preferable recognition effect of detection module is realized.
In this specific embodiment, the ranging from 20-35pC/N of the piezoelectric constant d33 of the polarized piezoelectric layer 113 in situ has been carried out,
Further preferably 25~29pC/N.
It is appreciated that the material of the piezoelectric layer 113 is ferroelectric polymer material, it is specific to can be selected but be not limited to：It is poly- inclined
Vinyl fluoride, polyvinyl chloride, poly- γ-methyl-Pidolidone ester, makrolon, Kynoar, polyvinylidene fluoride PVDF,
In the copolymers such as polyvinylidene fluoride trifluoro-ethylene PVDF-TrFE, polymetylmethacrylate, polytetrafluoroethylene (PTFE) TEFLON
One or several kinds of combinations.It is appreciated that it is placed on the display side of display module 17, the material of piezoelectric layer 113 in piezoelectric layer 113
Expect the ferroelectric polymer material for electrically conducting transparent.
In some embodiments of the utility model, the copolymer of the material selection Kynoar of the piezoelectric layer 113
It is specifically polyvinylidene fluoride trifluoro-ethylene PVDF-TrFE, in order to be pressed for Kynoar-trifluoro-ethylene copolymer
The range of the mass ratio of the preferable piezoelectric layer of electrical effect, the polyvinylidene fluoride and trifluoro-ethylene is (60-95)：(5-30),
Preferably, the range of mass ratio is (75-86)：(15-25), it is further preferred that its mass ratio is 80：20 or 75：25 or
70：30, the polyvinylidene fluoride and trifluoro-ethylene copolymer more individually select polyvinylidene fluoride that can reduce cost, and it is also
With preferable piezoelectric effect.
Existing α phases crystal grain also has β phases crystal grain and non-in the piezoelectric film 113 of gained after ferroelectric polymer film polarization
Amorphous material, the content of β phases is corresponding with the piezoelectric effect of piezoelectric film 113, when the content that β phase crystal grain accounts for total crystal grain is 60-
When 70%, polarized film has preferable piezoelectric effect, and the piezoelectric effect of the content more high polarization film of β phases is better.However excessively
Polarization can generate extra unnecessary charge etc., these excess charges are easily tied again with other charges on polymer surfaces
It closes, so as to influence the performance of gained piezoelectric film.In the present embodiment, the β phases crystal grain of the polymer piezoelectric film 113 and total crystal grain
Mass ratio is 60~70%.
Cover board 16 is used to protect identification module 11.When identification module 11 covers entire viewing area, cover board 16 is also display
Area all covers.Cover board 16 is transparent material, and the acoustic impedance of the material of cover board 16 and the acoustic impedance phase of display module 17
Closely, such as the layer structure that can arbitrarily be contacted with touch objects (such as finger of user) of glass plate, ground mass plate or plastic film.
When cover board 16 and identification module 11 link together, cover board 16 is preferably bonded by adhesive-layer and identification module 11, to enhance lid
The bonding strength of plate 16 and identification module 11.It is appreciated that adhesive-layer can omit.
Control module 12 can be at least one processing chip, and at least one signal processing chip can perform fingerprint
One or more functions in identification, touch-control identification and pressure detecting；Can also be that multiple processing chips are disposed on circuit
On plate 13, each processing chip performs one or more functions in fingerprint recognition, touch-control identification and pressure detecting.
Circuit board 13 can be printed circuit board 13, flexible PCB (Flexible Printed Circuit, abbreviation
FPC) 13 or other circuit boards 13 with conductive structure.Circuit board 13 is also electrically connected with external circuit.Circuit board 13 is logical
Cross the electric connection structures such as conducting wire and first electrode layer 111.The second electrode lay 115, display module 17 are electrically connected.Circuit board 13 is excellent
Flexible PCB 13 is selected as, so as to reduce the thickness of display module 1.
Discrete device 14 is can not integrate the electronic component made with control module 12.It is appreciated that can not
The electronic component made is integrated with control module 12, then discrete device 14 can omit.
Connector 15 is used to be electrically connected with external circuit.It is appreciated that the connector 15 is preferably FPC connector,
Make circuit board 13 and the electric connection of external circuit more firm.
One work period of display module 1 includes launching phase and receives stage two parts.Launching phase, external circuit
It passes sequentially through circuit board 17 while gives first electrode layer 111 and the second electrode lay 115 voltage signal respectively, make to give the first electricity
The voltage signal of pole layer 111 is higher than the voltage signal for giving the second electrode lay 115, and the both sides of piezoelectric layer 113 form a potential
Difference, and then generate mechanical oscillation and send out ultrasonic wave, external circuit has stopped giving first electrode layer 111 and second electrode at this time
115 voltage signal of layer；Reception stage, the ultrasonic wave that piezoelectric layer 113 is sent out touch finger back reflection, due at fingerprint valley with
It is compared at fingerprint ridge there are more air, therefore the fingerprint valley of finger is different with the signal strength of reflection at fingerprint ridge, usually
The ultrasonic energy that the energy for the ultrasonic wave that fingerprint valley is reflected can be reflected than fingerprint ridge is big, i.e., the signal that fingerprint valley is reflected
Intensity is better than the signal strength that fingerprint ridge is reflected, and piezoelectric layer 113 receives fingerprint valley and fingerprint ridge institute is reflected not
With ultrasonic signal so as to generate different electric signals, by setting the size of electrode block 1153, make the paddy ridge week of finger
Phase corresponds to multiple electrodes block 1153, therefore, corresponds respectively to the electrode block 1153 of fingerprint valley and fingerprint ridge due to electrostatic coupling
Effect generate the charge inducing of different number, control module 12 realizes fingerprint by detecting the difference of the quantity of charge inducing
Identification, finally passes to external circuit by testing result by circuit board 13.
It is appreciated that detection piezoelectric layer 113 receives 16 reflected ultrasonic signal of cover board for convenience, need to set
Regular hour difference avoids the ultrasonic signal propagated to cover board 16 and the mixing of 16 reflected ultrasonic signal of cover board, from
And ensure the precision of detection.For example, circuit board 13 provides potential difference to send out according to regular hour rule to piezoelectric layer 113
Ultrasonic signal.
The display module 1 of the utility model embodiment can also carry out touch-control identification.The control module 12 is integrated with tactile
Control the function of chip, in the case of not touched on the surface of cover board 16, ultrasonic signal meeting that piezoelectric layer 113 is sent out
It being reflected by the surface of cover board 16, piezoelectric layer 113 can detect reflected ultrasonic signal and generate electric signal, and second
The electrode block of piezoelectric layer 115 can generate a certain number of charge inducings due to the effect of electrostatic coupling；It is sent out on the surface of cover board 16
It is raw touch situation when, due to touch objects, (such as the finger of user only shows the partial fingerprints of user's finger in Fig. 1, refers to figure
In zigzag lines) contact between the surface of cover board 16 can make portion of ultrasonic sound wave signal through cover board 16 enter this touch
It touches in object, therefore the 16 reflected ultrasonic signal of cover board of touch location that piezoelectric layer 113 receives can change, from
And the electric signal that piezoelectric layer 113 generates at touch location can change, the sense generated so as to the electrode block of corresponding position
Answering the quantity of charge can also change, and 16 reflected ultrasonic signal of cover board does not become at the position not touched
Change, so as to not changed by the quantity of charge inducing that electrode block corresponding at touch location generates, therefore, pass through control
Whether module 12 detects and is changed to judge to touch at touch location with not by the quantity of the charge inducing at touch location
Position is touched, that is, realizes ultrasonic wave touch-control.
The display module 1 of the utility model embodiment can also carry out pressure-sensing.When finger applies pressure, piezoelectric layer
113 can deform upon, and when the pressure size of application is different, the deformation degree of piezoelectric layer 113 is different, so as to second electrode
The quantity for the charge inducing that the electrode block of layer 115 generates is with regard to different, when the deformation degree of piezoelectric layer 113 is bigger, electrode block production
The quantity of raw charge inducing is with regard to more；The deformation degree of piezoelectric layer 113 is got over hour, the quantity for the charge inducing that electrode block generates
It is just less；Therefore, the population size for the charge inducing that control module 12 is generated by detecting electrode block determines pressure size, i.e.,
Realize pressure detecting.It is appreciated that the control module 12 can be the integrated of multiple chips, so as to fulfill the inspection of unlike signal
Survey with analyzing and then display module 1 being allow to realize fingerprint recognition, the functions such as pressure-sensing and touch-control it is one or more.
The first embodiment of the utility model also provides a kind of electronic equipment (not shown), and which employs in first embodiment
The display module 1.The electronic equipment includes but not limited to setting for the brush fingers line such as mobile phone, tablet, laptop computer, attendance recorder
It is standby.
Second embodiment
Referring to Fig. 2, the second embodiment of the utility model provides a kind of display module 2, which includes identification
Module 21, cover board 26, control module 22, circuit board 23, discrete device 24, connector 25, display module 27 and ultrasonic wave transmitting
Module 28.Identification module 21 and ultrasonic wave transmitting module 28 are located at the opposite sides of display module 27 respectively.Display module 27 is used
It is display side in the side of display, ultrasonic wave transmitting module 28 is arranged on the side far from display side on display module 27.Cover board
26 are arranged on identification module 21 and positioned at side of the identification module 21 far from display module 27, and cover board 26 is identification module
21 all coverings.Circuit board 23 and control module 22 are electrically connected, circuit board 23 also and identification module 21, display module 27, divide
It is electrically connected from device 24, connector 25, ultrasonic wave transmitting module 28.Circuit board 23, discrete device 24, connects control module 22
It connects device 25 and is all located at side of the ultrasonic wave transmitting module 28 far from identification module 21, the control module 22 can drive described aobvious
Show that module 27 works.Circuit board 23, control module 22, discrete device 24, connector 25 are fixedly connected respectively with display module 27
Together or separate.It is appreciated that technical term or scientific terminology that the utility model uses should be the utility model
The ordinary meaning that the personage with general technical ability is understood in fields." first ", " second " used in the utility model
And similar word is not offered as any sequence, quantity or importance, and be used only to distinguish different component parts.
Identification module 21 includes first electrode layer 211, the second electrode lay 215 and positioned at the electricity of first electrode layer 211 and second
The first piezoelectric layer 213 between pole layer 215, the first electrode layer 211 show side setting close to the display module 27.
The second electrode lay 215 is multiple electrodes block, and multiple electrodes block array is intervally arranged on the surface of the first piezoelectric layer 213
On.Material of the electrode block for electrically conducting transparent, such as tin indium oxide, the metal oxide of indium gallium zinc electrically conducting transparent.Second electricity
Pole layer 215 does not interfere the display of display module 27, and the luminous energy of display module 27 passes through the second electrode lay 215.Due to finger
The width in a paddy ridge period be usually 300um, advantageously ensured that by the size for setting electrode block identification fingerprint it is clear
Clear degree, so that it is guaranteed that the accuracy of fingerprint recognition.Preferably, the area of the electrode block is less than or equal to 70 μm * 70 μm, into
One step is preferably less than or equal to 60 μm * 60 μm, and still more preferably 40 μm * 40 μm, the size of electrode block is within this range
When, fingerprint recognition best results.
First electrode layer 211 is a nonwoven fabric from filaments, and first electrode layer 211 selects the material of electrically conducting transparent, such as tin indium oxide, oxygen
Change the metal oxide of the electrically conducting transparents such as indium gallium zinc.It is appreciated that first electrode layer 211 or multiple electrodes block, knot
Structure is consistent with above-mentioned 215 structure of the second electrode lay.Preferably, both first electrode layer 211 and the second electrode lay 215 at least it
One is multiple electrodes block.When first electrode layer 211 and the second electrode lay 215 are all electrode block, the electrode of first electrode layer 211
Size, the position consistency of the electrode block of the size of block, position and the second electrode lay 215.
Cover board 26 is used to protect identification module 21.When identification module 21 covers entire viewing area, cover board 26 is also display
Area all covers.Cover board 26 is transparent material, and the acoustic impedance of the material of cover board 26 and the acoustic impedance phase of display module 27
Closely, such as the layer structure that can arbitrarily be contacted with touch objects (such as finger of user) of glass plate, ground mass plate or plastic film.
When cover board 26 and identification module 21 link together, cover board 26 is preferably bonded by adhesive-layer and identification module 21, to enhance lid
The bonding strength of plate 26 and identification module 21.It is appreciated that adhesive-layer can omit.
Control module 22 can be at least one processing chip, and at least one signal processing chip can perform fingerprint
One or more functions in identification, touch-control identification and pressure detecting；Can also be that multiple processing chips are disposed on circuit
On plate 23, each processing chip performs one or more functions in fingerprint recognition, touch-control identification and pressure detecting.
Circuit board 23 can be printed circuit board 23, flexible PCB 23 or other circuit boards with conductive structure
23.Circuit board 23 is also electrically connected with external circuit.Circuit board 23 passes through the electric connection structures such as conducting wire and first electrode layer 211.
The second electrode lay 215, display module 27 are electrically connected.Circuit board 23 is preferably flexible PCB 23, so as to reduce display
The thickness of module 2.
Discrete device 24 is can not integrate the electronic component made with control module 22.It is appreciated that can not
The electronic component made is integrated with control module 22, then discrete device 24 can omit.
Connector 25 is used to be electrically connected with external circuit.It is appreciated that the connector 25 is preferably FPC connector,
Make circuit board 23 and the electric connection of external circuit more firm.
The transparent ferroelectric polymer material of the material selection of first piezoelectric layer 213.
Projection of the ultrasonic wave transmitting module 28 on display module 27 at least covering part viewing area.Preferably, ultrasonic wave
Projection of the transmitting module 28 on display module 27 at least covers whole viewing areas.Ultrasonic wave transmitting module 28 includes the second pressure
Electric layer 283,281 and the 4th electrode layer 285 of third electrode layer.281 and the 4th electrode layer 285 of third electrode layer is arranged on the second pressure
On the opposite surface of electric layer 283, and third electrode layer 281 is arranged on the surface far from display side on display module 27.It can be with
Understand, ultrasonic wave transmitting module can also be spaced one end distance with display module 27.
281 and the 4th electrode layer 285 of a third electrode layer preferably nonwoven fabric from filaments, 281 and the 4th electrode layer of third electrode layer
285 be conductive material, can be transparent or opaque.It is appreciated that third electrode layer 281 and the 4th electrode layer 285 can also be such as the
One electrode layer 211 and the second electrode lay 215,281 and the 4th electrode layer 285 of third electrode layer at least one of both are electrode block,
Electrode block is arranged on the surface of the second piezoelectric layer 283.
It is appreciated that 213 and second piezoelectric layer 283 of the first piezoelectric layer is piezoelectric film, it is preferred that the first piezoelectricity
213 and second piezoelectric layer 283 of layer is polarized ferroelectric polymer film in situ.In the present embodiment, the first piezoelectric layer 213
It carries out polarization in situ on the second electrode lay 215 to obtain, the second piezoelectric layer 283 is the original position shape on the 4th electrode layer 285
Into, it is consistent in about polarized content in situ and first embodiment, therefore details are not described herein.
It is appreciated that ultrasonic wave transmitting module 28 and identification module 21 can exchange position, i.e. ultrasonic wave transmitting module 28
The display side of display module 27 is arranged on, identification module 21 is arranged on surface opposite with display side on display module 27, this
When cover board be arranged on surface of the ultrasonic wave transmitting module 28 far from display module 27, at this time the second piezoelectric layer 283 material choosing
With transparent ferroelectric polymer material, 281 and the 4th electrode layer 285 of third electrode layer is required to the material for conductive, transparent；This
When the second piezoelectric layer 283 the transparent or opaque ferroelectric polymer material of material selection, first electrode layer 211, second electrode
Layer 215 can be conductive opaque material；Circuit board 23, control module 22, discrete device 24, connector 15 are located at identification at this time
Side of the module far from display module.As long as identification module 11 and ultrasonic wave transmitting module 28 is made to be located at the opposite of display module
Both sides.Preferably identification module 11 is arranged on the display side of display module 27.
The identification module 21 of the display module 2 of the present embodiment can perform pressure detecting, touch-control identification and fingerprint detection work(
One or more in energy, ultrasonic wave transmitting module 28 can emit ultrasonic wave.The control module 22 of the present embodiment can control
Ultrasonic wave transmitting module 28 emits ultrasonic wave, and control module 22 can control identification module 21 according to reflected ultrasonic wave
Perform fingerprint recognition, touch-control identification function；The control module 22 of the present embodiment can control identification module 21 to perform pressure detecting
Function.
The principle of fingerprint recognition, pressure detecting and touch-control identification process in the present embodiment is consistent with first embodiment, therefore
Details are not described herein.
The second embodiment of the utility model also provides a kind of electronic equipment (not shown), uses institute in second embodiment
The display module 2 stated.The equipment that the electronic equipment includes but not limited to the brush fingers line such as mobile phone, tablet, laptop computer, attendance recorder.
3rd embodiment
Referring to Fig. 3, the second embodiment of the utility model provides a kind of display module 3, which includes identification
Module 31, cover board 36, control module 32, circuit board 33, discrete device 34, connector 35 and display module 37.Display module 37
It is display side for the side of display, identification module 31 is arranged on the display side of display module 37.Cover board 36 is arranged on identification
In module 31 and positioned at side of the identification module 31 far from display module 37, and cover board 36 all covers identification module 31.Electricity
Road plate 33 and control module 32 are electrically connected, and circuit board 33 is gone back and identification module 31, display module 37, discrete device 34, connection
Device 35 is electrically connected.It is remote that circuit board 33, control module 32, discrete device 34, connector 35 are all located at ultrasonic wave transmitting module 38
Side from identification module 31, the control module 32 can drive the display module 37 to work.Circuit board 33, control module
32nd, discrete device 34, connector 35 are fixed together or separate with display module 37 respectively.It is appreciated that this practicality
The novel technical term used or scientific terminology should be the personage institute in the utility model fields with general technical ability
The ordinary meaning of understanding." first ", " second " and the similar word used in the utility model be not offered as any sequence,
Quantity or importance, and be used only to distinguish different component parts.
Identification module 31 includes first electrode layer 311, the second electrode lay 315 and positioned at the electricity of first electrode layer 311 and second
Piezoelectric layer 313 between pole layer 315, the first electrode layer 311 show side setting close to the display module 37.
The second electrode lay 315 is multiple electrodes block, and multiple electrodes block array is intervally arranged on the surface of piezoelectric layer 313.
Material of the electrode block for electrically conducting transparent, such as tin indium oxide, the metal oxide of indium gallium zinc electrically conducting transparent.The second electrode lay
315 do not interfere the display of display module 37, and the luminous energy of display module 37 passes through the second electrode lay 315.Due to the one of finger
The width in a paddy ridge period is usually 300um, and the clarity of the fingerprint of identification is advantageously ensured that by the size for setting electrode block,
So that it is guaranteed that the accuracy of fingerprint recognition.Preferably, the area of the electrode block is less than or equal to 70 μm * 70 μm, further
Preferably less than or equal to 60 μm * 60 μm, still more preferably 40 μm * 40 μm, the size of electrode block within this range when,
Fingerprint recognition best results.
First electrode layer 311 is a nonwoven fabric from filaments, and first electrode layer 311 selects the material of electrically conducting transparent, such as tin indium oxide, oxygen
Change the metal oxide of the electrically conducting transparents such as indium gallium zinc.It is appreciated that first electrode layer 311 or multiple electrodes block, knot
Structure is consistent with above-mentioned 315 structure of the second electrode lay.Preferably, both first electrode layer 311 and the second electrode lay 315 at least it
One is multiple electrodes block.When first electrode layer 311 and the second electrode lay 315 are all electrode block, the electrode of first electrode layer 311
Size, the position consistency of the electrode block of the size of block, position and the second electrode lay 315.
Cover board 36 is used to protect identification module 31.When identification module 31 covers entire viewing area, cover board 36 is also display
Area all covers.Cover board 36 is transparent material, and the acoustic impedance of the material of cover board 36 and the acoustic impedance phase of display module 37
Closely, such as the layer structure that can arbitrarily be contacted with touch objects (such as finger of user) of glass plate, ground mass plate or plastic film.
When cover board 36 and identification module 31 link together, cover board 36 is preferably bonded by adhesive-layer and identification module 31, to enhance lid
The bonding strength of plate 36 and identification module 31.It is appreciated that adhesive-layer, cover board 36 can omit.
Control module 32 can be at least one processing chip, and at least one signal processing chip can perform fingerprint
One or more functions in identification, touch-control identification and pressure detecting；Can also be that multiple processing chips are disposed on circuit
On plate 33, each processing chip performs one or more functions in fingerprint recognition, touch-control identification and pressure detecting.
Circuit board 33 can be printed circuit board 33, flexible PCB 33 or other circuit boards with conductive structure
33.Circuit board 33 is also electrically connected with external circuit.Circuit board 33 by the electric connection structures such as conducting wire and first electrode layer 311,
The second electrode lay 315, display module 37 are electrically connected.Circuit board 33 is preferably flexible PCB 33, so as to reduce display
The thickness of module 3.
Discrete device 34 is can not integrate the electronic component made with control module 32.It is appreciated that can not
The electronic component made is integrated with control module 32, then discrete device 34 can omit.
Connector 35 is used to be electrically connected with external circuit.It is appreciated that the connector 35 is preferably FPC connector,
Make circuit board 33 and the electric connection of external circuit more firm.
The transparent ferroelectric polymer material of the material selection of piezoelectric layer 313.It is appreciated that the piezoelectric layer 313 is piezoelectricity
Film, it is preferred that piezoelectric layer 313 is polarized ferroelectric polymer film in situ.In the present embodiment, piezoelectric layer 313 is
Carry out what polarization in situ obtained on two electrode layers 315, it is consistent in about polarized content in situ and first embodiment, therefore herein
It repeats no more.
As a preferred embodiment, 31 part inlay of identification module of the present embodiment is in display module 37 or identification module
31 and display module 37 be integrally formed.Specifically, the first electrode layer 311 of identification module 31 is embedded in the display of display module 37
In the side or display side of first electrode layer 311 and display module 37 is integrally formed.Identification module 31 is embedded in display module 37
It above or with display module is integrally formed, the thickness of display module 3 can be reduced, meet the lightening demand of user.It is appreciated that
First electrode layer 311 can be embedded on display module in whole or in part in embedded direction.Preferably, only first electrode layer
311 be multiple electrodes block, and electrode block is all embedded in embedded direction on display module 37.
Referring to Fig. 4, it is appreciated that identification module 31 can not also be arranged on the display side of display module 37, identification mould
Block 31 be arranged on display module 37 with the opposite side in display side, specifically, opposite with display side one on display module 37
Inlay the first electrode layer 311 of identification module 31 in side；Or on display module 37 with the opposite side in display side and first electrode layer
311 are integrally formed.It is a kind of preferred embodiment that identification module 31, which is arranged on side opposite with display side on display module 37,
Identification module 31 does not influence the display of display module 37.It is appreciated that piezoelectric layer 313 can select opaque ferroelectricity to gather at this time
Object material is closed, first electrode layer 311, the second electrode lay 312 can select conductive opaque material, not influence display module
37 display.It is further preferred that only first electrode layer 311 is multiple electrodes block, electrode block is all inlayed in embedded direction
On display module 37.
The display module 3 of the present embodiment is consistent with the occupation mode of the display module 1 of first embodiment, and the present embodiment is not
Repeat narration.
The 3rd embodiment of the utility model also provides a kind of electronic equipment (not shown), uses institute in 3rd embodiment
The display module 3 stated.The equipment that the electronic equipment includes but not limited to the brush fingers line such as mobile phone, tablet, laptop computer, attendance recorder.
Compared with prior art, the display module of the utility model includes identification module and display module, the identification mould
Block be arranged on display module for display side, the identification module include first electrode layer, piezoelectric layer, the second electrode lay,
The first electrode layer and the second electrode lay are separately positioned on two opposite surfaces of piezoelectric layer, the first electrode layer and
At least one both two electrode layers are multiple electrodes block, and the multiple electrode block array arrangement is described on the surface of piezoelectric layer
First electrode layer be fixed on display module for display side, display module is not only with simple in structure, high excellent of reliability
Point is more in line with the trend that electronic equipment is lightening, integrated level is high, and identification module leans on the finger of person of modern times, and accuracy of identification is more
Add accurate.
The display module of the utility model includes viewing area and non-display area for the side of display, and the identification module is extremely
Few covering part viewing area so as to which display module can make comprehensive screen, can carry out full frame fingerprint recognition, touch-control identification and pressure
Detection, it is vdiverse in function.
The piezoelectric layer of the utility model is polarized ferroelectric polymer film in situ, and piezoelectric layer thickness is thin, more meets frivolous
The demand of change.
The circuit board of the utility model is electrically connected with display module, and the work of institute's control module driving display module is shown
Show that the integrated level of module further improves.
The circuit board of the utility model is flexible PCB, and flexible PCB can arbitrarily be bent, and the shape of display module is fitted
Answering property further enhances.
The electronic equipment of the utility model include above-mentioned display module, the electronic equipment not only have it is simple in structure, can
By property it is high the advantages of, be more in line with the trend that electronic equipment is lightening, integrated level is high, and identification module leans on the finger of person of modern times,
Accuracy of identification is more accurate.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Any modification made within the principle of utility model, equivalent replacement and improvement etc. should all include the scope of protection of the utility model
Within.
Claims (10)
1. a kind of display module, it is characterised in that：The display module includes the folded identification module and display module set, the knowledge
Other module be arranged on display module for display side, the identification module include first electrode layer, piezoelectric layer, second electrode
Layer, the first electrode layer and the second electrode lay are separately positioned on two opposite surfaces of piezoelectric layer, the first electrode layer
Be multiple electrodes block at least one both the second electrode lay, the multiple electrode block array arrangement on the surface of piezoelectric layer,
The first electrode layer be fixed on display module for display side.
2. display module as described in claim 1, it is characterised in that：The display module includes display for the side of display
Area and non-display area, the identification module at least covering part viewing area.
3. display module as claimed in claim 2, it is characterised in that：The display module further includes circuit board, the circuit
Plate is arranged on side of the display module far from identification module, and the circuit board and first electrode layer, the second electrode lay are electrically connected.
4. display module as claimed in claim 3, it is characterised in that：The piezoelectric layer is thin for polarized ferroelectric polymers in situ
Film.
5. display module as claimed in claim 3, it is characterised in that：The first electrode layer, piezoelectric layer, the second electrode lay are
Transparent material.
6. display module as claimed in claim 3, it is characterised in that：The display module further includes control module, the electricity
Road plate and control module are electrically connected, and the control module is located at side of the display module far from identification module.
7. display module as claimed in claim 6, it is characterised in that：The circuit board is electrically connected with display module, is controlled
The work of module drive display module processed.
8. display module as claimed in claim 3, it is characterised in that：The circuit board is flexible PCB.
9. display module as claimed in claim 3, it is characterised in that：The thickness of the piezoelectric layer is less than 30 μm.
10. a kind of electronic equipment, it is characterised in that：The electronic equipment employs claim 1-9 any one of them such as and shows
Module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721309151.0U CN207516966U (en) | 2017-10-10 | 2017-10-10 | Display module and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721309151.0U CN207516966U (en) | 2017-10-10 | 2017-10-10 | Display module and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207516966U true CN207516966U (en) | 2018-06-19 |
Family
ID=62533004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721309151.0U Active CN207516966U (en) | 2017-10-10 | 2017-10-10 | Display module and electronic equipment |
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| Country | Link |
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| CN (1) | CN207516966U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109948496A (en) * | 2019-03-12 | 2019-06-28 | 京东方科技集团股份有限公司 | A kind of fingerprint recognition device and display device |
| WO2020232934A1 (en) * | 2019-05-21 | 2020-11-26 | 武汉华星光电技术有限公司 | Display panel structure and electronic device |
| WO2022091828A1 (en) * | 2020-10-30 | 2022-05-05 | 株式会社クレハ | Piezoelectric film, touch panel, and piezoelectric film manufacturing method |
-
2017
- 2017-10-10 CN CN201721309151.0U patent/CN207516966U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109948496A (en) * | 2019-03-12 | 2019-06-28 | 京东方科技集团股份有限公司 | A kind of fingerprint recognition device and display device |
| WO2020232934A1 (en) * | 2019-05-21 | 2020-11-26 | 武汉华星光电技术有限公司 | Display panel structure and electronic device |
| WO2022091828A1 (en) * | 2020-10-30 | 2022-05-05 | 株式会社クレハ | Piezoelectric film, touch panel, and piezoelectric film manufacturing method |
| JPWO2022091828A1 (en) * | 2020-10-30 | 2022-05-05 | ||
| JP7426502B2 (en) | 2020-10-30 | 2024-02-01 | 株式会社クレハ | Piezoelectric film, touch panel, and piezoelectric film manufacturing method |
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Effective date of registration: 20200630 Address after: No.88, Yingbin Avenue, Shouan Town, Pujiang County, Chengdu City, Sichuan Province Patentee after: Chengdu Dachao Technology Co.,Ltd. Address before: 611600 Bajiao Village Group 5, Shou'an Town, Pujiang County, Chengdu City, Sichuan Province Patentee before: Fang Rong |
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Effective date of registration: 20201026 Address after: No.102, 1st floor, No.151, Tianxin Road, high tech Zone, Chengdu, Sichuan 610000 Patentee after: Chengdu core technology Co.,Ltd. Address before: No.88, Yingbin Avenue, Shouan Town, Pujiang County, Chengdu City, Sichuan Province Patentee before: Chengdu Dachao Technology Co.,Ltd. |