CN109492465A - Display module and electronic device - Google Patents
Display module and electronic device Download PDFInfo
- Publication number
- CN109492465A CN109492465A CN201710818911.9A CN201710818911A CN109492465A CN 109492465 A CN109492465 A CN 109492465A CN 201710818911 A CN201710818911 A CN 201710818911A CN 109492465 A CN109492465 A CN 109492465A
- Authority
- CN
- China
- Prior art keywords
- display module
- ultrasonic sensor
- electrode
- piezoelectric element
- conductive electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
Abstract
The invention discloses a kind of display module and electronic devices.Display module includes flexible OLED display and ultrasonic sensor.Ultrasonic sensor is arranged on flexible OLED display, and ultrasonic sensor includes substrate, multiple pixel electrodes, piezoelectric element, conductive electrode and the processing chip connecting with multiple pixel electrodes.Multiple pixel electrodes are produced on substrate and in array distributions.Piezoelectric element is arranged on substrate and covers multiple pixel electrodes, and piezoelectric element is used to emit ultrasonic wave and generates electric signal after the ultrasonic wave for receiving object reflection to be detected, and multiple pixel electrodes are for receiving electric signal.Conductive electrode is arranged on the piezoelectric element, and piezoelectric element is between pixel electrode and conductive electrode.Processing chip is for handling electric signal to form the ultrasonograph of object to be detected.Since ultrasonic sensor is arranged on flexible OLED display, so that ultrasonic sensor will not occupy the space other than display module, convenient for flexible OLED display does more.
Description
Technical field
The present invention relates to fingerprint identification technology field, in particular to a kind of display module and electronic device.
Background technique
Currently, the ultrasonic sensor in mobile phone for fingerprint recognition is arranged mostly in the form of physical button in mobile phone front
Display screen other than region, due to reserve installation space to ultrasonic sensor, display screen would not take mobile phone completely
Front causes the screen accounting of mobile phone lower.
Summary of the invention
Embodiments of the present invention provide a kind of display module and electronic device.
The display module of embodiment of the present invention includes flexible organic light-emitting diode (OLED) display screen and ultrasonic sensor, institute
Ultrasonic sensor setting is stated on the flexible organic light-emitting diode (OLED) display screen, the ultrasonic sensor include substrate,
Multiple pixel electrodes, piezoelectric element, conductive electrode and processing chip.Multiple pixel electrodes make on the substrate and are in
Array distribution.The piezoelectric element is arranged on the substrate and covers multiple pixel electrodes.The piezoelectric element is used for
Transmitting ultrasonic wave simultaneously generates electric signal after the ultrasonic wave for receiving object reflection to be detected.Multiple pixel electrodes are for receiving
The electric signal.The conductive electrode is arranged on the piezoelectric element.The piezoelectric element is located at the pixel electrode and institute
It states between conductive electrode.The processing chip is connect with multiple pixel electrodes, and the processing chip is for handling the electricity
Signal is to form the ultrasonograph of the object to be detected.
In embodiment of the present invention, the ultrasonic sensor in display module is arranged in flexible organic light-emitting diode display
On screen, so that ultrasonic sensor will not occupy the space other than display module, it is convenient for flexible organic light-emitting diode display
Screen does more, and improves the screen accounting of the electronic devices such as mobile phone, tablet computer；Meanwhile each pixel electricity of ultrasonic sensor
Pole can determine object to be detected pressing position on a display screen and piezoelectric element on the position based on the received electrical signal
The electric signal of generation, to reduce processing chip data volume to be treated, improve the recognition efficiency of ultrasonic sensor.
In some embodiments, the membrane structure that the ultrasonic sensor is integrated.The ultrasound of integrated membrane structure
Wave sensor is easier to be arranged on flexible organic light-emitting diode (OLED) display screen, convenient for manufacture display module.
In some embodiments, the piezoelectric element is layer structure whole made of piezoelectric material.Whole layer
The piezoelectric element of shape structure is easy to manufacture, and manufacturing cost is lower.
In some embodiments, the piezoelectric element includes multiple piezo columns, and multiple piezo columns are arranged described
It on substrate and is in array distribution, multiple piezo columns are corresponding with multiple pixel electrodes, each piezo column covering pair
The pixel electrode answered.Due to multiple piezo column arrays setting on piezoelectric element, each piezo column is by adjacent
The electrical interference and vibration interference that piezo column generates are smaller, thus compared to the whole layer structure being made out of a piezoelectric material
(i.e. laminated structure), the electric signal that the piezoelectric element of present embodiment generates under ultrasonic wave effect is more acurrate, and then handles core
The ultrasonograph that piece handles electric signal formation is more acurrate.
In some embodiments, be formed on the substrate in array distribution multiple pixel circuits and with it is multiple described
The corresponding a plurality of conducting wire of pixel circuit, multiple pixel circuits are corresponding with multiple pixel electrodes, each pixel electricity
Road is connected with the corresponding pixel electrode, and the every conducting wire is for connecting the corresponding pixel circuit and the processing core
Piece.Present embodiment is electrically connected convenient for pixel electrode with processing chip by setting pixel circuit and conducting wire.
In some embodiments, the ultrasonic sensor further includes connection electrode and lead.The connection electrode is set
It sets the side far from multiple pixel electrodes in the substrate and is connect with the processing chip.The pixel electrode passes through
The lead is connected to the connection electrode, and the conductive electrode is connected to the connection electrode by the lead.This implementation
Mode is electrically connected with processing chip convenient for pixel electrode with conductive electrode respectively by setting lead and connection electrode.
In some embodiments, the conductive electrode is whole layer structure.Conductive electrode is in whole stratiform knot
Structure convenient for handling the energization of chip controls conductive electrode, while making that conductive electrode is easy to manufacture and cost of manufacture is lower.
In some embodiments, the conductive electrode includes layer structure and prolongs respectively from the both ends of layered structure
The extended structure stretched, layered structure and the extended structure wrap the piezoelectric element jointly.Processing chip can pass through
Extended structure is electrically connected with conductive electrode.In this way, being electrically connected convenient for processing chip with conductive electrode by setting extended structure.
In some embodiments, the conductive electrode includes multiple spaced strip structures, each strip structure
The conductive electrode it is corresponding with the pixel electrode in a row or column.Relative to the conductive electrode of layer structure, strip
The conductive electrode of structure is more convenient for handling the signal input of chip controls conductive electrode and output, to improve supersonic sensing
The precision of device identification fingerprint.
In some embodiments, the material of the conductive electrode is tin indium oxide, nano-silver thread, metal grill, nanometer
Any one in carbon pipe and graphene.The conductive electrode made of above-mentioned material has preferable toughness and translucency, from
And the ultrasonic sensor made of the conductive electrode has preferable toughness；It is arranged in flexible organic light-emitting diode (OLED) display screen
On ultrasonic sensor will not block the display of flexible organic light-emitting diode (OLED) display screen, ultrasonic sensor is able to maintain soft
Property organic light-emitting diode (OLED) display screen integral color it is consistent and keep flexible organic light-emitting diode (OLED) display screen more beautiful.
In some embodiments, the light transmittance of the conductive electrode is greater than 90%.Make ultrasound made of the conductive electrode
Wave sensor has preferable translucency, so that ultrasonic sensor will not block the aobvious of flexible organic light-emitting diode (OLED) display screen
Show, the integral color that ultrasonic sensor is able to maintain flexible organic light-emitting diode (OLED) display screen unanimously makes flexible organic light emission
Diode (OLED) display screen is more beautiful.
In some embodiments, the material of the substrate is glass or Kapton.In this way, by above-mentioned material system
At substrate cost is relatively low, translucency is preferable, cost is relatively low for the ultrasonic sensor made of the substrate, translucency compared with
It is good；When ultrasonic sensor is arranged on flexible organic light-emitting diode (OLED) display screen, the ultrasonic wave with preferable translucency
Sensor will not block the display of flexible organic light-emitting diode (OLED) display screen, while be arranged in flexible organic light-emitting diode display
The integral color that ultrasonic sensor on screen is able to maintain flexible organic light-emitting diode (OLED) display screen unanimously makes flexible organic
Light emitting diode (LED) display screen is more beautiful.
In some embodiments, the material of the pixel electrode is tin indium oxide, nano-silver thread, metal grill, nanometer
Any one in carbon pipe and graphene.The pixel electrode made of above-mentioned material has preferable toughness and translucency, from
And the ultrasonic sensor made of the pixel electrode has preferable toughness and translucency；It is arranged in flexible organic light-emitting diodes
Ultrasonic sensor on tube display screen will not block the display of flexible organic light-emitting diode (OLED) display screen, ultrasonic sensor energy
Enough integral colors for keeping flexible organic light-emitting diode (OLED) display screen are consistent and make flexible organic light-emitting diode (OLED) display screen more
It is beautiful.
In some embodiments, the ultrasonic sensor further includes circuit board, and multiple pixel electrodes described are led
Electrode and the processing chip are electrically connected with the circuit board.Circuit board is provided with connector in order to ultrasonic wave biography
Sensor is electrically connected by the connector on circuit board with other electronic components.
In some embodiments, the display module further includes cover board, and the cover board is arranged in the organic hair of flexibility
On optical diode display screen.In this way, cover board can play the role of protection to flexible organic light-emitting diode (OLED) display screen.
In some embodiments, the material of the cover board is sapphire or strengthened glass.It is covered made of above-mentioned material
Plate has preferable crushing resistance and translucency, can carry pressing force of the object pressing to be detected when in display module, and will not hide
Keep off the display of flexible organic light-emitting diode (OLED) display screen.
The electronic device of embodiment of the present invention includes display module described in shell and above-mentioned any one embodiment,
The display module setting is on the housing.
The electronic device of embodiment of the present invention and the ultrasonic sensor in display module are arranged in flexible organic light emission
On diode (OLED) display screen, so that ultrasonic sensor will not occupy the space other than display module, it is convenient for flexible organic light emission
Diode (OLED) display screen does more, and improves the screen accounting of the electronic devices such as mobile phone, tablet computer；Meanwhile ultrasonic sensor
Each pixel electrode can determine that object to be detected presses position and piezoelectric element on a display screen based on the received electrical signal
The electric signal generated on the position, to reduce processing chip data volume to be treated, improve ultrasonic sensor
Recognition efficiency.
The additional aspect and advantage of embodiments of the present invention will be set forth in part in the description, partially will be from following
Description in become obvious, or the practice of embodiment through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the cross-sectional view of the display module of certain embodiments of the present invention；
Fig. 2 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention；
Fig. 3 is the decomposition diagram of the ultrasonic sensor of certain embodiments of the present invention；
Fig. 4 is the floor map of the electronic device of certain embodiments of the present invention；
Fig. 5 is the cross-sectional view of the display module of certain embodiments of the present invention；
Fig. 6 is the cross-sectional view of the display module of certain embodiments of the present invention；
Fig. 7 is the cross-sectional view of the display module of certain embodiments of the present invention；
Fig. 8 is the cross-sectional view of the display module of certain embodiments of the present invention；
Fig. 9 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention；
Figure 10 is the cross-sectional view of the display module of certain embodiments of the present invention；
Figure 11 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention；
Figure 12 is the cross-sectional view of the display module of certain embodiments of the present invention；
Figure 13 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention；
Figure 14 is the cross-sectional view of the display module of certain embodiments of the present invention；
Figure 15 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention；
Figure 16 is the cross-sectional view of the display module of certain embodiments of the present invention；
Figure 17 is the cross-sectional view of the display module of certain embodiments of the present invention；
Figure 18 is the cross-sectional view of the display module of certain embodiments of the present invention；
Figure 19 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention；
Figure 20 is the cross-sectional view of the display module of certain embodiments of the present invention；
Figure 21 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention；
Figure 22 is the cross-sectional view of the display screen of certain embodiments of the present invention；
Figure 23 is the cross-sectional view of the display module of certain embodiments of the present invention；
Figure 24 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention；
Figure 25 is the cross-sectional view of the display module of certain embodiments of the present invention；
Figure 26 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention；
Figure 27 is the decomposition diagram of the ultrasonic sensor of certain embodiments of the present invention；
Figure 28 is the decomposition diagram of the ultrasonic sensor of certain embodiments of the present invention；
Figure 29 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention；
Figure 30 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention；
Figure 31 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention；
Figure 32 is the decomposition diagram of the ultrasonic sensor of certain embodiments of the present invention；With
Figure 33 is the cross-sectional view of the ultrasonic sensor of certain embodiments of the present invention.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for
Purpose is described, relative importance is not understood to indicate or imply or implicitly indicates the quantity of indicated technical characteristic.
" first " is defined as a result, the feature of " second " can explicitly or implicitly include one or more feature.?
In description of the invention, the meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected or can mutually communicate；It can be directly connected, it can also be by between intermediary
It connects connected, can be the connection inside two elements or the interaction relationship of two elements.For the ordinary skill of this field
For personnel, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
Following disclosure provides many different embodiments or example is used to realize different structure of the invention.In order to
Simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.Certainly, they are merely examples, and
And it is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or reference letter,
This repetition is for purposes of simplicity and clarity, itself not indicate between discussed various embodiments and/or setting
Relationship.In addition, the present invention provides various specific techniques and material example, but those of ordinary skill in the art can be with
Recognize the application of other techniques and/or the use of other materials.
Fig. 1 and Fig. 2 is please referred to, the display module 200 of embodiment of the present invention includes display screen 90 and ultrasonic sensor
100.Ultrasonic sensor 100 is integrated in display screen 90.Ultrasonic sensor 100 include substrate 10, multiple pixel electrodes 20,
Piezoelectric element 30, conductive electrode 40 and processing chip 50.Multiple pixel electrodes 20 are produced on substrate 10 and in array distributions.Pressure
Electric device 30 is arranged on substrate 10 and covers multiple pixel electrodes 20, and piezoelectric element 30 is for emitting ultrasonic wave and receiving
Electric signal is generated after the ultrasonic wave of object reflection to be detected, multiple pixel electrodes 20 are for receiving the electric signal.Conductive electrode 40 is set
It sets on piezoelectric element 30, piezoelectric element 30 is between pixel electrode 20 and conductive electrode 40.Handle chip 50 and multiple pictures
Plain electrode 20 connects, and processing chip 50 is for handling the electric signal to form the ultrasonograph of object to be detected.
Display screen 90 can be liquid crystal display or Organic Light Emitting Diode (Organic Light-Emitting
Diode, OLED) display screen.Ultrasonic sensor 100 is structure as a whole and is integrated in display screen 90.Ultrasonic sensor 100
Light transmittance be greater than 90%, when so that ultrasonic sensor 100 being integrated in display screen 90, ultrasonic sensor 100 will not be hidden
It keeps off display screen 90 and causes the display effect of display screen 90 poor.
Object to be detected can be finger, test template etc..When processing chip 50 controls conductive electrode 40 and pixel electrode 20
When being powered so as to be applied with high frequency voltage (such as: frequency is greater than the voltage of 20KHZ) on conductive electrode 40 and pixel electrode 20, pressure
Electric device 30 generates ultrasonic wave under the action of high frequency voltage and launches outward ultrasonic wave；If finger is placed on display module 200
On, then finger can reflect the ultrasonic wave of the transmitting of piezoelectric element 30 and transmit back to piezoelectric element 30, due on finger there are fingerprint,
The finger that thus each position receives on piezoelectric element 30 reflect ultrasonic wave it is not exactly the same, thus each position of piezoelectric element 30
It is also not exactly the same to set the electric signal (or piezoelectric signal) generated under ultrasonic wave effect, each position generation on piezoelectric element 30
Electric signal the fingerprint pattern of finger can be collectively formed；Processing chip 50 controls multiple pixel electrodes 20 and receives piezoelectric element 30
Each position on the electric signal that generates, which is transmitted on processing chip 50 by multiple pixel electrodes 20, handles core
Piece 50 handles the electric signal to form the fingerprint pattern of finger.
Ultrasonic sensor 100 in the display module 200 of embodiment of the present invention is integrated in display screen 90, ultrasonic wave
Sensor 100 will not occupy the space other than display module 200, convenient for display screen 90 does more, improve mobile phone, plate electricity
The screen accounting of the electronic devices such as brain, wearable device 300 (shown in Fig. 4)；Meanwhile each pixel electricity of ultrasonic sensor 100
Pole 20 can determine position and piezoelectric element 30 of the object pressing to be detected on display screen 90 at this based on the received electrical signal
The electric signal generated on position, to reduce the processing data volume to be treated of chip 50, improve ultrasonic sensor 100
Recognition efficiency.
Referring to Fig. 1, the display module 200 of embodiment of the present invention includes display screen 90 and ultrasonic sensor 100.
Display screen 90 is liquid crystal display, and along the light emission direction of display screen 90, display screen 90 includes the backlight set gradually
Mould group 91, down polaroid 92, thin film transistor (TFT) (Thin-film transistor, TFT) substrate 93, liquid crystal layer 94, colored filter
Mating plate 95, upper polaroid 96 and cover board 97.Display screen 90 can be in rectangle, circle, the sheet of ellipse, triangle, polygon
Structure.
Please refer to figs. 2 and 3, and ultrasonic sensor 100 includes substrate 10, multiple pixel electrodes 20, piezoelectric element 30, leads
Electrode 40 and processing chip 50.The membrane structure that ultrasonic sensor 100 is integrated.Ultrasonic sensor 100 is integrated in back
Between optical mode group 91 and down polaroid 92.
The material of substrate 10 is glass or Kapton.The shape of substrate 10 and the shape of display screen 90 match.
Cost is relatively low, translucency is preferable for the substrate 10 made of glass or polyimide film material, therefore, is made of the substrate 10
Ultrasonic sensor 100 cost is relatively low, translucency is preferable.When ultrasonic sensor 100 is integrated in display screen 90, tool
The display of display screen 90 will not be blocked by having the ultrasonic sensor 100 of preferable translucency, while is integrated in display screen 90
The integral color that ultrasonic sensor 100 is able to maintain display screen 90 unanimously keeps display screen 90 more beautiful.
Multiple pixel electrodes 20 are produced on substrate 10 and in array distributions, that is to say, that multiple pixel electrodes 20 include
The pixel electrode 20 and the spaced pixel electrode 20 of multiple row of higher order interlace setting.The material of pixel electrode 20 is tin indium oxide
(Indium tin oxide, ITO), nano-silver thread (Agnanowire), metal grill (metal mesh), carbon nanotubes and
Any one in graphene (Graphene), the pixel electrode 20 made of above-mentioned material have preferable toughness and light transmission
Property, so that the ultrasonic sensor 100 made of the pixel electrode 20 has preferable toughness and translucency.Pixel electrode 20
Light transmittance is greater than 90%, so that ultrasonic sensor 100 made of the pixel electrode 20 is had preferable translucency, thus ultrasonic wave
Sensor 100 will not block the display of display screen 90, and the integral color that ultrasonic sensor 100 is able to maintain display screen 90 is consistent
And keep display screen 90 more beautiful.Pixel electrode 20 can be used for receiving electric signal, and each pixel electrode 20 can be according to receiving
Electric signal determine a position of display module 200 (or ultrasonic sensor 100), pixel electrode 20 is close on substrate 10
The acquisition precision of degree and ultrasonic sensor 100 is positively correlated, and the density of pixel electrode 20 of the invention can make supersonic sensing
Device 100 detects the fingermark image of object to be detected.
Piezoelectric element 30 is arranged on substrate 10 and covers multiple pixel electrodes 20.Piezoelectric element 30 is made of piezoelectric material
Whole laminated structure, the shape of piezoelectric element 30 and the shape of substrate 10 match.The material of piezoelectric element 30 is poly- inclined
Vinyl fluoride (Polyvinylidene fluoride, PVDF) makes since Kynoar has preferable toughness and translucency
Piezoelectric element 30 has preferable flexibility and translucency, and the flexibility and translucency of ultrasonic sensor 100 are also preferable at this time.
Piezoelectric element 30 can generate under high frequency voltage (such as: frequency is greater than the voltage of 20KHZ) effect and to display screen 90
Light emission direction emits ultrasonic wave.After piezoelectric element 30 receives the ultrasonic wave of object reflection to be detected, piezoelectric element 30 is in ultrasound
It can be generated electric signal (or piezoelectric signal) under wave effect, object to be detected can be finger, test template etc..
The side of the separate pixel electrode 20 of piezoelectric element 30 is arranged in conductive electrode 40, that is to say, that piezoelectric element 30
Between pixel electrode 20 and conductive electrode 40.Conductive electrode 40 is layer structure whole made of conductive material, conductive
The shape of electrode 40 and the shape of piezoelectric element 30 match.The material of conductive electrode 40 is tin indium oxide, nano-silver thread, metal
Any one in grid, carbon nanotubes and graphene.The light transmittance of conductive electrode 40 is greater than 90%.Conductive electrode 40 and picture
Plain electrode 20 can apply high frequency voltage to piezoelectric element 30 after leading to high frequency voltage, so that piezoelectric element 30 be made to generate ultrasonic wave.
Conductive electrode 40 and pixel electrode 20 can also receive the electric signal of the generation of piezoelectric element 30.
Processing chip 50 is all connected with multiple pixel electrodes 20 and conductive electrode 40.Processing chip 50, which can be used for controlling, leads
The energization of electrode 40 and pixel electrode 20.It is connected to high frequency voltage for example, processing chip 50 can control conductive electrode 40 and controls
Pixel electrode 20 processed is grounded, so that piezoelectric element 30 is applied high frequency voltage, to make piezoelectric element 30 generate and launch outward
Ultrasonic wave.Processing chip 50 piezoelectric signal that also controllable pixels electrode 20 and conductive electrode 40 generate piezoelectric element 30 transmits
Onto processing chip 50.Processing chip 50 is also used to handle the electric signal of the generation of piezoelectric element 30 to form the ultrasound of object to be detected
Wave image.Processing chip 50 can be set also can be set outside substrate 10 on substrate 10.
When processing chip 50 controls conductive electrode 40 and the energization of pixel electrode 20 so that conductive electrode 40 and pixel electrode 20
On be applied with high frequency voltage (such as: frequency be greater than 20KHZ voltage) when, piezoelectric element 30 generates under the action of high frequency voltage
Ultrasonic wave simultaneously launches outward ultrasonic wave；If finger is placed in display module 200, finger can reflect the transmitting of piezoelectric element 30
Ultrasonic wave is simultaneously transmitted back to piezoelectric element 30, and since there are fingerprints on finger, thus each position receives on piezoelectric element 30
Finger reflect ultrasonic wave it is not exactly the same, thus each position of piezoelectric element 30 electric signal for generating under ultrasonic wave effect
(or piezoelectric signal) is also not exactly the same, and the finger of finger can be collectively formed in the electric signal that each position generates on piezoelectric element 30
Line pattern；Processing chip 50 controls multiple pixel electrodes 20 and receives the electric signal generated on each positions of piezoelectric elements 30,
The electric signal is transmitted on processing chip 50 by multiple pixel electrodes 20, and processing chip 50 handles the electric signal to form finger
Fingerprint pattern.
Referring to Fig. 4, the electronic device 300 of embodiment of the present invention includes shell 301 and any one embodiment party of the present invention
The display module 200 of formula, display module 200 are arranged on shell 301.Electronic device 300 includes mobile phone, tablet computer, intelligence
Bracelet, intelligent helmet, smartwatch, remote controler, automatic navigator, any one in e-book.
The electronic device 300 and the ultrasonic sensor 100 in display module 200 of embodiment of the present invention are integrated in display
In screen 90, so that ultrasonic sensor 100 will not occupy the space other than display module 200, convenient for display screen 90 to be made more
Greatly, the screen accounting of electronic device 300 is improved；Meanwhile each pixel electrode 20 of ultrasonic sensor 100 can be according to receiving
Electric signal determine object to be detected presses the position on display screen 90 and piezoelectric element 30 generates on the position electric signal,
To reduce the processing data volume to be treated of chip 50, improve the recognition efficiency of ultrasonic sensor 100.
The electronic device 300 and display module 200 of embodiment of the present invention also have the advantages that first, ultrasound
Wave sensor 100 is integrated in display module 200 in the form of integrated membrane structure, convenient for manufacture display module 200.
Second, multiple pixel electrodes 20 are produced on substrate 10, convenient for the production higher pixel electrode 20 of precision, to mention
Rise the precision that ultrasonic sensor 100 identifies fingerprint.
Second, the light transmittance of pixel electrode 20 and conductive electrode 40 is all larger than 90%, makes to surpass made of the pixel electrode 20
Sonic sensor 100 has preferable translucency, so that ultrasonic sensor 100 will not block the display of display screen 90, ultrasound
The integral color that wave sensor 100 is able to maintain display screen 90 unanimously keeps display screen 90 more beautiful.
Third, conductive electrode 40 control the energization of conductive electrode 40 convenient for processing chip 50, together in whole laminated structure
When make that conductive electrode 40 is easy to manufacture and cost of manufacture is lower.
4th, the material of pixel electrode 20 and conductive electrode 40 is tin indium oxide, nano-silver thread, metal grill, nanometer
Any one in carbon pipe and graphene, pixel electrode 20 and conductive electrode 40 made of above-mentioned material all have preferably
Toughness and translucency, so that the ultrasonic sensor 100 made of the pixel electrode 20 and conductive electrode 40 is with preferable tough
Property and translucency；The ultrasonic sensor 100 being integrated in display screen 90 will not block the display of display screen 90, supersonic sensing
The integral color that device 100 is able to maintain display screen 90 unanimously keeps display screen 90 more beautiful.
5th, piezoelectric element 30 is convenient for the manufacture of piezoelectric element 30 in whole layer structure and manufacturing cost is lower.
6th, compared to by ultrasonic sensor 100,90 outside of display screen and the side of separate user are set, it will be ultrasonic
The setting of wave sensor 100 makes ultrasonic sensor 100 closer to user between backlight module 91 and down polaroid 92, to subtract
The loss that small ultrasonic wave generates when propagating in display module 200 promotes the fingerprint recognition precision of ultrasonic sensor 100.
Referring to Fig. 5, in some embodiments, the ultrasonic sensor 100 of above embodiment can also be arranged in
Between thin film transistor base plate 93 and down polaroid 92.It is arranged in backlight module 91 under compared to by ultrasonic sensor 100
Between polaroid 92, the ultrasonic sensor 100 of present embodiment is closer to user, to reduce ultrasonic wave in display module
The loss generated when propagating in 200 promotes the fingerprint recognition precision of ultrasonic sensor 100.
Referring to Fig. 6, in some embodiments, the setting of ultrasonic sensor 100 of above embodiment is filtered in colour
Between mating plate 95 and upper polaroid 96.Compared to by the setting of ultrasonic sensor 100 backlight module 91 and down polaroid 92 it
Between, the ultrasonic sensor 100 of present embodiment is closer to user, thus when reducing ultrasonic wave and propagating in display module 200
The loss of generation promotes the fingerprint recognition precision of ultrasonic sensor 100.
Referring to Fig. 7, in some embodiments, the ultrasonic sensor 100 of above embodiment is arranged in upper polarisation
Between piece 96 and cover board 97.It is arranged between backlight module 91 and down polaroid 92 compared to by ultrasonic sensor 100, this reality
The ultrasonic sensor 100 of mode is applied closer to user, to reduce the damage generated when ultrasonic wave is propagated in display module 200
It loses, promotes the fingerprint recognition precision of ultrasonic sensor 100.
Fig. 8 and Fig. 9 is please referred to, in some embodiments, the colored filter 95 of above embodiment is ultrasonic wave biography
The substrate 10 of sensor 100, multiple pixel electrodes 20 are produced on colored filter 95 and in array distributions, and piezoelectric element 30 is arranged
On colored filter 95 and cover multiple pixel electrodes 20.In other words, the substrate 10 in present embodiment is colored filter
Mating plate 95, multiple pixel electrodes 20 are produced on a surface of colored filter 95, so that display module 200 does not need additionally
Substrate is provided, to reduce the thickness of display module 200, and then convenient for display module 200 and electronic device 300 to be made more
It is thin.At this point, when ultrasonic sensor 100 to be integrated in display module 200, it is more without production formation on colored filter 95
The surface of a pixel electrode 20 closer to thin film transistor (TFT) (Thin-film transistor, TFT) substrate 93, the surface with it is thin
Liquid crystal layer 94 is folded between film transistor substrate 93, and conductive electrode 40 connects with upper polaroid 96.
Figure 10 and Figure 11 is please referred to, in some embodiments, the thin film transistor base plate 93 of above embodiment is super
The substrate 10 of sonic sensor 100, multiple pixel electrodes 20 are produced on thin film transistor base plate 93 and in array distribution, piezoelectricity
Element 30 is arranged on thin film transistor base plate 93 and covers multiple pixel electrodes 20.Conductive electrode 40 is arranged in piezoelectric element 30
On, piezoelectric element 30 is between pixel electrode 20 and conductive electrode 40.In other words, the substrate 10 in present embodiment is
Thin film transistor base plate 93, multiple pixel electrodes 20 are produced on a surface of thin film transistor base plate 93, to show mould
Group 200 does not need to be additionally provided substrate, to reduce the thickness of display module 200, and then is convenient for display module 200 and electricity
Sub-device 300 is made thinner.At this point, when ultrasonic sensor 100 to be integrated in display module 200, thin film transistor (TFT) base
There is no to make the surface for forming multiple pixel electrodes 20 on plate 93 closer to colored filter 95, the surface and colored filter 95
Between be folded with liquid crystal layer 94, and conductive electrode 40 connects with down polaroid 92.
Figure 12 and Figure 13 is please referred to, in some embodiments, the upper polaroid 96 of above embodiment is ultrasonic wave biography
The substrate 10 of sensor 100, multiple pixel electrodes 20 are produced in upper polaroid 96 and in array distributions, and the setting of piezoelectric element 30 exists
In upper polaroid 96 and cover multiple pixel electrodes 20.Conductive electrode 40 is arranged on piezoelectric element 30, and piezoelectric element 30 is located at
Between pixel electrode 20 and conductive electrode 40.In other words, the substrate 10 in present embodiment is upper polaroid 96, multiple pictures
Plain electrode 20 is produced on a surface of upper polaroid 96, so that display module 200 does not need to be additionally provided substrate, to subtract
The small thickness of display module 200, and then convenient for display module 200 and electronic device 300 are made thinner.At this point, that will surpass
When sonic sensor 100 is integrated in display module 200, it may is that and form multiple pixel electricity without production in upper polaroid 96
The surface of pole 20 connects with cover board 97；Alternatively, the surface and the coloured silk that there is no production to form multiple pixel electrodes 20 in upper polaroid 96
Colo(u)r filter 95 connects.
Figure 14 and Figure 15 is please referred to, in some embodiments, the down polaroid 92 of above embodiment is ultrasonic wave biography
The substrate 10 of sensor 100, multiple pixel electrodes 20 are produced in down polaroid 92 and in array distributions, and the setting of piezoelectric element 30 exists
In down polaroid 92 and cover multiple pixel electrodes 20.Conductive electrode 40 is arranged on piezoelectric element 30, and piezoelectric element 30 is located at
Between pixel electrode 20 and conductive electrode 40.In other words, the substrate 10 in present embodiment is down polaroid 92, multiple pictures
Plain electrode 20 is produced on a surface of down polaroid 92, so that display module 200 does not need to be additionally provided substrate, to subtract
The small thickness of display module 200, and then convenient for display module 200 and electronic device 300 are made thinner.At this point, that will surpass
When sonic sensor 100 is integrated in display module 200, it may is that and form multiple pixel electricity without production in down polaroid 92
The surface of pole 20 connects with thin film transistor base plate 93；Alternatively, forming multiple pixel electrodes 20 without production in upper polaroid 96
Surface connect with backlight module 91.
Figure 16 is please referred to, in some embodiments, display screen 90 can be OLED display screen, along the luminous side of display screen 90
It include the glass film transistor base 91 set gradually, Organic Light Emitting Diode 92, packaged glass 93, partially to, display screen 90
Mating plate 94 and cover board 95.Ultrasonic sensor 100 can integrate in OLED display screen 90.For example, ultrasonic sensor 100
It can integrate between packaged glass 93 and polaroid 94.Compared to by ultrasonic sensor 100, the remote of display screen 90 is set
From user side, ultrasonic sensor 100, which is integrated between packaged glass 93 and polaroid 94, makes ultrasonic sensor 100 more
Close to user, to reduce the loss generated when ultrasonic wave is propagated in display module 200, ultrasonic sensor 100 is promoted
Fingerprint recognition precision.
Figure 17 is please referred to, in some embodiments, display screen 90 can be OLED display screen, along the luminous side of display screen 90
It include the glass film transistor base 91 set gradually, Organic Light Emitting Diode 92, packaged glass 93, partially to, display screen 90
Mating plate 94 and cover board 95.Ultrasonic sensor 100 can integrate in OLED display screen 90.For example, ultrasonic sensor 100
It can integrate between polaroid 94 and cover board 95.Packaged glass 93 and polarisation are integrated in compared to by ultrasonic sensor 100
Between piece 94, the ultrasonic sensor 100 of present embodiment is closer to user, to reduce ultrasonic wave in display module 200
The loss generated when propagation promotes the fingerprint recognition precision of ultrasonic sensor 100.
Figure 18 and Figure 19 is please referred to, in some embodiments, display screen 90 can be OLED display screen, along display screen 90
Light emission direction, display screen 90 include glass film transistor base 91, the Organic Light Emitting Diode 92, packaged glass set gradually
93, polaroid 94 and cover board 95.Ultrasonic sensor 100 can integrate in OLED display screen 90.For example, packaged glass 93
For the substrate 10 of ultrasonic sensor 100, multiple pixel electrodes 20 are produced on packaged glass 93 and in array distribution, piezoelectricity members
Part 30 is arranged on packaged glass 93 and covers multiple pixel electrodes 20.Conductive electrode 40 is arranged on piezoelectric element 30, piezoelectricity
Element 30 is between pixel electrode 20 and conductive electrode 40.In other words, the substrate 10 in present embodiment is to encapsulate glass
Glass 93, multiple pixel electrodes 20 are produced on one of surface of packaged glass 93, be can be multiple pixel electrodes 20 and are made
On the surface of the close polaroid 94 of packaged glass 93, at this point, conductive electrode 40 connects with polaroid 94；It is also possible to multiple pictures
Plain electrode 20 is produced on the surface (surface i.e. far from polaroid 94) of the close Organic Light Emitting Diode 92 of packaged glass 93, this
When, conductive electrode 40 connects with Organic Light Emitting Diode 92, so that display module 200 does not need to be additionally provided substrate, to subtract
The small thickness of display module 200, and then convenient for display module 200 and electronic device 300 are made thinner.It is passed by ultrasonic wave
When sensor 100 is integrated in display module 200, when multiple pixel electrodes 20 are produced on the close polaroid 94 of packaged glass 93
When surface, the surface for not having production to form multiple pixel electrodes 20 on packaged glass 93 connects with Organic Light Emitting Diode 92；When
When multiple pixel electrodes 20 are produced on the surface of close Organic Light Emitting Diode 92 of packaged glass 93, do not have on packaged glass 93
The surface that production forms multiple pixel electrodes 20 connects with polaroid 94.
Figure 20 and Figure 21 is please referred to, in some embodiments, display screen 90 can be OLED display screen, along display screen 90
Light emission direction, display screen 90 include glass film transistor base 91, the Organic Light Emitting Diode 92, packaged glass set gradually
93, polaroid 94 and cover board 95.Ultrasonic sensor 100 can integrate in OLED display screen 90.For example, polaroid 94 is
The substrate 10 of ultrasonic sensor 100, multiple pixel electrodes 20 are produced on polaroid 94 and in array distribution, piezoelectric elements 30
It is arranged on polaroid 94 and covers multiple pixel electrodes 20.Conductive electrode 40 is arranged on piezoelectric element 30, piezoelectric element 30
Between pixel electrode 20 and conductive electrode 40.In other words, the substrate 10 in present embodiment is polaroid 94, multiple
Pixel electrode 20 is produced on a surface of polaroid 94, so that display module 200 does not need to be additionally provided substrate, to subtract
The small thickness of display module 200, and then convenient for display module 200 and electronic device 300 are made thinner.At this point, that will surpass
When sonic sensor 100 is integrated in display module 200, it may is that and form multiple pixel electrodes without production on polaroid 94
20 surface connects with packaged glass 90；Alternatively, the surface and the lid that there is no production to form multiple pixel electrodes 20 on polaroid 94
Plate 95 connects.
Figure 22-24 is please referred to, in some embodiments, display screen 90 can be flexible OLED display, along display screen 90
Light emission direction, display screen 90 includes the flexible thin-film transistor substrate 91 set gradually, Organic Light Emitting Diode 92, flexible envelope
Fill film 93, polaroid 94.Ultrasonic sensor 100 can integrate in OLED display screen 90.For example, polaroid 94 is ultrasonic wave
The substrate 10 of sensor 100, multiple pixel electrodes 20 are produced on polaroid 94 and in array distributions, and the setting of piezoelectric element 30 exists
On polaroid 94 and cover multiple pixel electrodes 20.Conductive electrode 40 is arranged on piezoelectric element 30, and piezoelectric element 30 is located at picture
Between plain electrode 20 and conductive electrode 40.In other words, the substrate 10 in present embodiment is polaroid 94, multiple pixel electricity
Pole 20 is produced on a surface of polaroid 94, so that display module 200 does not need to be additionally provided substrate, to reduce aobvious
Show the thickness of mould group 200, and then convenient for display module 200 and electronic device 300 are made thinner.At this point, being passed by ultrasonic wave
When sensor 100 is integrated in display module 200, the table for not having production to form multiple pixel electrodes 20 on polaroid 94 may is that
Face connects with flexible encapsulating film 93；Alternatively, ultrasonic sensor 100 connects with flexible encapsulating film 93.
Figure 25 is please referred to, in some embodiments, display screen 90 can be flexible OLED display, along the hair of display screen 90
Light direction, display screen 90 include flexible thin-film transistor substrate 91, the Organic Light Emitting Diode 92, flexible encapsulating film set gradually
93, polaroid 94.Ultrasonic sensor 100 can integrate in OLED display screen 90.For example, ultrasonic sensor 100 is integrated
On the side of the separate flexible encapsulating film 93 of polaroid 94.Compared to by ultrasonic sensor 100, display screen 90 is set
Far from user side, ultrasonic sensor 100 is integrated on the side of separate flexible encapsulating film 93 of polaroid 94, ultrasound is made
Wave sensor 100 is closer to user, to reduce the loss generated when ultrasonic wave is propagated in display module 200, promotes ultrasound
The fingerprint recognition precision of wave sensor 100.
It should be pointed out that the setting of ultrasonic sensor 100 of embodiment of the present invention is wrapped on flexible OLED display
Include: ultrasonic sensor 100 is integrated in flexible OLED display or ultrasonic sensor 100 is integrated in flexible OLED and shows
In display screen.
Please continue to refer to Figure 25, in some embodiments, display module 200 further includes cover board 110.Cover board 110 is arranged
On flexible OLED display.In this way, cover board 110 can play the role of protection to flexible OLED display.
In some embodiments, the material of cover board 110 is sapphire or strengthened glass.
The cover board 110 made of above-mentioned material has preferable crushing resistance and translucency, can carry object pressing to be detected and exist
Pressing force when in display module 200, and the display of flexible OLED display will not be blocked.
In some embodiments, when electronic device 300 is wearable device (including Intelligent bracelet, intelligent helmet, intelligence
Wrist-watch etc.) when, by the fingerprint identification function of ultrasonic sensor 100 in wearable device, wearable device can be used for protecting
It protects personal health information (wearable device can monitor the parameters such as human heartbeat's pulse, blood pressure), realizes personal wearable device
And the combination of bio-identification.
Figure 26 and Figure 27 is please referred to, in some embodiments, the piezoelectric element 30 of above embodiment includes multiple pressures
Electric column 32 and the insulating layer 34 being filled between multiple piezo columns 32.Multiple piezo columns 32 are arranged on substrate 10 and in arrays point
Cloth, multiple piezo columns 32 are corresponding with multiple pixel electrodes 20, and each piezo column 32 covers corresponding pixel electrode 20.Due to piezoelectricity
32 array of multiple piezo columns setting on element 30, therefore the electrical property that each piezo column 32 is generated by adjacent piezo column 32 is dry
It disturbs and vibration interference is smaller, thus compared to the whole laminated structure being made out of a piezoelectric material, the piezoelectricity member of present embodiment
The electric signal that part 30 generates under ultrasonic wave effect is more acurrate, and then handles chip 50 and handle the ultrasonic wave shadow that the electric signal is formed
As more acurrate.The material of piezo column 32 is Kynoar.The material of insulating layer 34 can be epoxy resin.Due to epoxy resin
There is excellent adhesive strength to the surface of metal and nonmetallic materials, dielectric properties are good, and deformation retract rate is small, product size
Stability is good, and hardness is high, and flexibility is preferable, the features such as to alkali and most of solvent-stable.Therefore, insulating layer 34 uses asphalt mixtures modified by epoxy resin
Rouge convenient for encapsulation piezo column 32 and makes the structure of piezoelectric element 30 more stable as filled media.
Figure 28 is please referred to, in some embodiments, multiple pixel circuits 12 in array distribution are formed on substrate 10
And a plurality of conducting wire 14 corresponding with multiple pixel circuits 12, multiple pixel circuits 12 are corresponding with multiple pixel electrodes 20, each picture
Plain circuit 12 is connected with corresponding pixel electrode 20, and every conducting wire 14 is for connecting corresponding pixel circuit 12 and processing chip
50.Pixel circuit 12 is arranged between substrate 10 and pixel electrode 20, and in substrate 10 and pixel circuit can be set in conducting wire 14
On 12 the same side.In this way, convenient for the production of pixel circuit 12 and conducting wire 14, and connect convenient for pixel electrode 20 and processing chip 50
It connects.In other embodiments, conducting wire 14 also can be set on the opposite side with pixel circuit 12 of substrate 10.
Figure 29 is please referred to, in some embodiments, the ultrasonic sensor 100 of above embodiment further includes connection electricity
Pole 60 and lead 70.Connection electrode 60 is arranged in the side far from multiple pixel electrodes 20 of substrate 10 and connects with processing chip 50
It connects.Pixel electrode 20 is connected to connection electrode 60 by lead 70, and conductive electrode 40 is connected to connection electrode 60 by lead 70.
Lead 70 includes a plurality of pixel electrode lead 72 connecting with pixel electrode 20, every pixel electrode lead 72 respectively with a picture
Plain electrode 20 connects.Lead 70 further includes the conductive electrode lead 74 being correspondingly connected with conductive electrode 40, when conductive electrode 40 is
When the layer structure of entirety, conductive electrode lead 74 is one；When conductive electrode 40 is a plurality of spaced strip structure
When conductive electrode 40, the quantity of conductive electrode lead 74 and the quantity of conductive electrode 40 of strip structure are consistent.Present embodiment
By setting lead 70 and connection electrode 60, it is electrically connected respectively with processing chip 50 convenient for pixel electrode 20 with conductive electrode 40.
Please refer to Figure 30, in some embodiments, the conductive electrode 40 of above embodiment include layer structure 42 and
The extended structure 44 each extended over from the both ends of layer structure 42, layer structure 42 and extended structure 44 wrap piezoelectricity member jointly
Part 30.Extended structure 44 can integrally extend outward to form for the edge of layer structure 42, and extended structure 44 can be stratiform knot
The a part at the edge of structure 42 extends outward to form.Processing chip 50 is electrically connected by extended structure 44 with conductive electrode 40.Such as
This, is electrically connected convenient for processing chip 50 with conductive electrode 40 by setting extended structure 44.
Figure 31 and Figure 32 is please referred to, in some embodiments, the conductive electrode 40 of above embodiment includes multiple
Every the conductive electrode 40 of the strip structure of setting, the conductive electrode 40 of each strip structure and the pixel electrode 20 in same row are right
It answers.In other embodiments, the conductive electrode 40 of each strip structure is corresponding with the pixel electrode 20 in same a line.Pixel electricity
Pole 20 is corresponding with the conductive electrode 40 of strip structure to apply height convenient for pixel electrode 20 and conductive electrode 40 on piezoelectric element 30
Frequency voltage (such as: frequency is greater than the voltage of 20KHZ), while being used for convenient for pixel electrode 20 and conductive electrode 40 by piezoelectric element
30 electric signals generated under piezoelectric effect are transmitted in other elements.Relative to the conductive electrode 40 of layer structure, strip knot
The conductive electrode 40 of structure is more convenient for handling signal input and output that chip 50 controls conductive electrode 40, to improve ultrasonic wave
The precision of the identification fingerprint of sensor 100.
Figure 33 is please referred to, in some embodiments, the ultrasonic sensor 100 of above embodiment further includes circuit board
80, multiple pixel electrodes 20, conductive electrode 40 and processing chip 50 are electrically connected with circuit board 80.Handling chip 50 can be with
It is arranged on circuit board 80.Specifically, circuit board 80 can be flexible circuit board, and circuit board 80 can be set in the remote of substrate 10
On side from pixel electrode 20.Circuit board 80 is provided with connector in order to which ultrasonic sensor 100 passes through on circuit board 80
Connector be electrically connected with other electronic components.
It should be noted that " multiple pixel electrodes 20 are produced on substrate 10 " mentioned in the present invention, " multiple pixel electricity
Pole 20 is produced on colored filter 95 ", " multiple pixel electrodes 20 are produced on thin film transistor base plate 93 ", " multiple pixels
Electrode 20 is produced in upper polaroid 96 ", " multiple pixel electrodes 20 are produced in down polaroid 92 ", " multiple pixel electrodes 20
Be produced on packaged glass 93 ", the production in " multiple pixel electrodes 20 are produced on polaroid 94 " include by plated film, photoresist
Pixel electrode 20 is directly produced on substrate 10 by coating/development/exposure, etching, removal photoresist, the techniques such as annealing, optical filter
On 95, on substrate 93, on the upper and lower polaroid 92 of upper polaroid 96, on packaged glass 93 and on polaroid 94.
In the description of this specification, reference term " certain embodiments ", " embodiment ", " some embodiment party
The description of formula ", " exemplary embodiment ", " example ", " specific example " or " some examples " etc. means in conjunction with the embodiment party
Formula or example particular features, structures, materials, or characteristics described are contained at least one embodiment or example of the invention
In.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover,
Particular features, structures, materials, or characteristics described can be in any one or more embodiments or example with suitable
Mode combine.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one described feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two,
Three etc., unless otherwise specifically defined.
Although embodiments of the present invention have been shown and described above, it is to be understood that above embodiment is
Illustratively, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be right
Above embodiment is changed, modifies, replacement and variant, and the scope of the present invention is defined by the claims and their equivalents.
Claims (14)
1. a kind of display module, which is characterized in that described including flexible organic light-emitting diode (OLED) display screen and ultrasonic sensor
On the flexible organic light-emitting diode (OLED) display screen, the ultrasonic sensor includes: for ultrasonic sensor setting
Substrate；
Multiple pixel electrodes, multiple pixel electrode production are on the substrate and in array distribution；
Piezoelectric element, the piezoelectric element are arranged on the substrate and cover multiple pixel electrodes, the piezoelectric element
For emitting ultrasonic wave and generating electric signal after the ultrasonic wave for receiving object reflection to be detected, multiple pixel electrodes are used for
Receive the electric signal；
Conductive electrode, the conductive electrode are arranged on the piezoelectric element, the piezoelectric element be located at the pixel electrode and
Between the conductive electrode；And
The processing chip connecting with multiple pixel electrodes, the processing chip form described for handling the electric signal
The ultrasonograph of object to be detected.
2. display module according to claim 1, which is characterized in that the film knot that the ultrasonic sensor is integrated
Structure.
3. display module according to claim 1 or 2, which is characterized in that the piezoelectric element is made of piezoelectric material
Whole layer structure；Or
The piezoelectric element includes multiple piezo columns, and multiple piezo column settings are more on the substrate and in array distribution
A piezo column is corresponding with multiple pixel electrodes, and each piezo column covers the corresponding pixel electrode.
4. display module according to claim 1 or 2, which is characterized in that be formed on the substrate in array distribution
Multiple pixel circuits and a plurality of conducting wire corresponding with multiple pixel circuits, multiple pixel circuits and multiple pixels
Electrode is corresponding, and each pixel circuit is connected with the corresponding pixel electrode, and the every conducting wire is corresponding for connecting
The pixel circuit and the processing chip.
5. display module according to claim 1 or 2, which is characterized in that the ultrasonic sensor further include:
Connection electrode, the connection electrode be arranged in the substrate far from multiple pixel electrodes side and with the place
Manage chip connection；And
Lead, the pixel electrode are connected to the connection electrode by the lead, and the conductive electrode passes through the lead
It is connected to the connection electrode.
6. display module according to claim 1 or 2, which is characterized in that the conductive electrode is whole layer structure；
Or
The conductive electrode includes layer structure and the extended structure that each extends over from the both ends of layered structure, layered
Structure and the extended structure wrap the piezoelectric element jointly；Or
The conductive electrode includes multiple spaced strip structures, the conductive electrode and a line of each strip structure or
The pixel electrode on one column is corresponding.
7. display module according to claim 1 or 2, which is characterized in that the material of the conductive electrode be tin indium oxide,
Any one in nano-silver thread, metal grill, carbon nanotubes and graphene.
8. display module according to claim 1 or 2, which is characterized in that the light transmittance of the conductive electrode is greater than 90%.
9. display module according to claim 1 or 2, which is characterized in that the material of the substrate is that glass or polyamides are sub-
Amine film.
10. display module according to claim 1 or 2, which is characterized in that the material of the pixel electrode is indium oxide
Any one in tin, nano-silver thread, metal grill, carbon nanotubes and graphene.
11. display module according to claim 1 or 2, which is characterized in that the ultrasonic sensor further includes circuit
Plate, multiple pixel electrodes, the conductive electrode and the processing chip are electrically connected with the circuit board.
12. display module according to claim 1 or 2, which is characterized in that the display module further includes cover board, described
Cover board setting is on the flexible organic light-emitting diode (OLED) display screen.
13. display module according to claim 12, which is characterized in that the material of the cover board is sapphire or reinforcing glass
Glass.
14. a kind of electronic device, which is characterized in that the electronic device includes:
Shell；
Display module described in claim 1-13 any one, the display module setting is on the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710818911.9A CN109492465A (en) | 2017-09-12 | 2017-09-12 | Display module and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710818911.9A CN109492465A (en) | 2017-09-12 | 2017-09-12 | Display module and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109492465A true CN109492465A (en) | 2019-03-19 |
Family
ID=65687828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710818911.9A Pending CN109492465A (en) | 2017-09-12 | 2017-09-12 | Display module and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109492465A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133664A (en) * | 2019-04-28 | 2019-08-16 | 武汉华星光电技术有限公司 | Ranging mould group and display panel |
-
2017
- 2017-09-12 CN CN201710818911.9A patent/CN109492465A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133664A (en) * | 2019-04-28 | 2019-08-16 | 武汉华星光电技术有限公司 | Ranging mould group and display panel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102437527B1 (en) | Display device | |
| CN106935144B (en) | Display module and terminal device | |
| US20190197284A1 (en) | Ultrasonic transducers embedded in organic light emitting diode panel and display devices including the same | |
| CN207182314U (en) | Display module and electronic installation | |
| KR102449450B1 (en) | Pressure sensor member and display device including the same | |
| US11402899B2 (en) | Electronic apparatus | |
| CN109492459A (en) | Display module and electronic device | |
| CN109492462A (en) | Display module and electronic device | |
| CN109492456A (en) | Ultrasonic sensor and electronic device | |
| CN109492457A (en) | Display module and its manufacturing method and electronic device | |
| CN109492468A (en) | Display module and its manufacturing method and electronic device | |
| CN109492460A (en) | Display module and electronic device | |
| CN207557959U (en) | Display module and electronic device | |
| CN207182323U (en) | Display module and electronic installation | |
| CN109492465A (en) | Display module and electronic device | |
| CN109496085A (en) | Cover plate assembly and its manufacturing method and electronic device | |
| CN109492458A (en) | Display module and its manufacturing method and electronic device | |
| US20210041987A1 (en) | Display device, sensing unit, and sensing method | |
| CN109492483A (en) | Ultrasonic sensor and electronic device | |
| CN109492482A (en) | Display module and electronic device | |
| CN109492485A (en) | Display module and electronic device | |
| CN207182326U (en) | Display module and electronic installation | |
| CN109492481A (en) | Ultrasonic sensor and electronic device | |
| CN109492464A (en) | Display module and electronic device | |
| CN109492466A (en) | Display module and electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 330096 No.699 Tianxiang North Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Applicant after: Jiangxi OMS Microelectronics Co.,Ltd. Address before: 330013 No.698 Tianxiang Avenue, high tech Zone, Nanchang City, Jiangxi Province Applicant before: OFilm Microelectronics Technology Co.,Ltd. Address after: 330013 No.698 Tianxiang Avenue, high tech Zone, Nanchang City, Jiangxi Province Applicant after: OFilm Microelectronics Technology Co.,Ltd. Address before: 330013 No.698 Tianxiang Avenue, high tech Zone, Nanchang City, Jiangxi Province Applicant before: NANCHANG OFILM BIO-IDENTIFICATION TECHNOLOGY Co.,Ltd. |