CN104835439B - Display device and driving method - Google Patents
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- CN104835439B CN104835439B CN201510183257.XA CN201510183257A CN104835439B CN 104835439 B CN104835439 B CN 104835439B CN 201510183257 A CN201510183257 A CN 201510183257A CN 104835439 B CN104835439 B CN 104835439B
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Abstract
A kind of display device and its driving method.The display device includes image display module and ultrasonic wave sensing module, and image display module includes first, second substrate and is located in display medium therebetween.First substrate includes an at least data wire and at least one first show electrode, and the second substrate includes at least one second show electrode, and first show electrode is used to drive display medium display image with second show electrode.Ultrasonic wave sensing module includes ultrasonic transmitting element and ultrasonic wave receiving element, ultrasonic transmitting element is arranged on first substrate and for launching ultrasonic signal, ultrasonic wave receiving element is arranged at the surface of second show electrode away from the second substrate, is transmitted for receiving and changing the ultrasonic signal into touch sense signals to second show electrode.Data wire timesharing exports a data-signal and reads the touch sense signals to first show electrode with display image or from the second show electrode to identify touch operation.
Description
Technical field
The present invention relates to a kind of display device, has display function more particularly to one kind and also utilizes ultrasonic wave sense simultaneously
Survey the display device of touch operation.
Background technology
In existing touch control display apparatus, independently separately set with touch-control sensing module for the display module that image is shown
Put, touch-control sensing module is divided into infrared type, condenser type and ultrasonic type etc. according to technology, and wherein ultrasonic type sensing device further is usual
Including sound wave transmitting element, acoustic receiver unit and for detecting object features（Such as fingerprint）Switch element array.It can be seen that should
Touch control display apparatus structure is more complicated, cost is higher.
The content of the invention
In view of this, it is necessary to which providing a kind of relatively simple the having of structure, image is shown and the display of touch recognition fills
Put.
A kind of display device, the display device include image display module and ultrasonic wave sensing module, and the image shows mould
Group includes the second substrate that first substrate and first substrate be oppositely arranged and is located in showing between first, second substrate
Show medium, the first substrate includes an at least data wire and at least one first show electrode, and the second substrate includes at least 1 the
Two show electrodes, first show electrode are used to drive the display medium display image with second show electrode.The ultrasonic wave
Sensing module includes ultrasonic transmitting element and ultrasonic wave receiving element, and the ultrasonic transmitting element is arranged on the first substrate
And for launching ultrasonic wave, the ultrasonic wave receiving element is arranged at the surface of second show electrode away from the second substrate, use
Transmitted in receiving the ultrasonic signal and the ultrasonic signal being converted into touch sense signals to second show electrode, the number
A data-signal, which is exported, according to line timesharing with display image or reads the touch-control from second show electrode to first show electrode
Sensing signal is to identify touch operation.
A kind of driving method of display device, the display device include image display module and ultrasonic wave sensing module, should
Image display module includes first substrate, the second substrate being oppositely arranged with first substrate and is located in first, second base
Display medium between plate, the first substrate include an at least data wire and at least one first show electrode, the second substrate bag
At least one second show electrode is included, first show electrode is used to drive the display medium display figure with second show electrode
Picture, ultrasonic wave sensing module include ultrasonic transmitting element and ultrasonic wave receiving element, and the ultrasonic transmitting element is arranged at
On the first substrate and for launching ultrasonic wave, the ultrasonic wave receiving element is arranged at second show electrode away from second base
The surface of plate, the driving method include step：
In first time period, data-signal is loaded to first show electrode from the data wire, first show electrode with
Second show electrode drives the display medium to show the data-signal；
In second time period, stop loading data-signal to first show electrode, control the ultrasonic transmitting element to send out
Penetrate ultrasonic signal；
In the 3rd period, the ultrasonic wave receiving element receives the ultrasonic signal of reflection, and the ultrasonic wave is believed
Number touch sense signals are converted to, the touch sense signals are transmitted to the data wire；
The touch sense signals are read from the data wire, touch operation is identified according to the touch sense signals.
Compared to prior art, display device directly receives touch-control sense in the touch-control sensing period using second show electrode
Signal is surveyed, while using data line transfer touch sense signals to reading circuit, therefore, the display device structure is simple.In addition,
The ultrasonic wave receiving element is arranged at the surface of the second show electrode corresponding to second substrate, therefore, it is possible to prevent the second display
The high temperature process of electrode brings damage to the ultrasonic wave receiving element, and the touch-control sensing for effectively increasing the display device is reliable
Property.
Brief description of the drawings
Fig. 1 is the perspective exploded view of the display device of first embodiment of the invention.
Fig. 2 is the three-dimensional assembling schematic diagram of display device shown in Fig. 1.
Fig. 3 is cross-sectional view of the display device along III-III lines shown in Fig. 2.
Fig. 4 is the circuit block of the display device shown in Fig. 1-3.
Fig. 5 is the schematic equivalent circuit of display device shown in Fig. 1-3.
Fig. 6 is the drive waveforms figure of display device shown in Fig. 1.
Fig. 7 is the driving schematic flow sheet of display device shown in Fig. 1.
Fig. 8 is the cross-sectional view that the present invention one changes the display device in embodiment.
Fig. 9 is the cross-sectional view of the display device in another change embodiment of the present invention.
Figure 10 is the schematic equivalent circuit of the display device as Figure 8-9.
Figure 11 is the drive waveforms figure of display device as Figure 8-9.
Main element symbol description
| Display device | 100、200、300 |
| Display module | 110、210、310 |
| Ultrasonic wave senses module | 120、220、320 |
| First substrate | 111、211、311 |
| Second substrate | 112、212、312 |
| Layer of liquid crystal molecule | 113、213、313 |
| First surface | 111a |
| Second surface | 111b |
| First direction | X |
| Second direction | Y |
| Scan line | G、G1~Gm |
| Public electrode wire | C、C1~Cm |
| Pixel cell | Px |
| First switching element | T1 |
| First insulating barrier | LD1 |
| 3rd surface | 112a |
| 4th surface | 112b |
| Chromatic filter layer | CF |
| Second show electrode | 102、202、302 |
| Second insulating barrier | LD2 |
| First show electrode | 101、201、301 |
| Ultrasonic transmitting element | 121、221、321 |
| Ultrasonic wave transmitting element | 121a |
| First conductive structure | 121b |
| Second conductive structure | 121c |
| Ultrasonic wave receiving element | 122、222、322 |
| First thickness | Dp1 |
| Second thickness | Dp2 |
| Touch sense signals | Dt |
| Object under test | 180 |
| Scanning circuit | 130 |
| Data circuit | 140 |
| Common electric voltage circuit | 150 |
| Reading circuit | 160 |
| Two-way switch | SW |
| First capacitance structure | C1 |
| Second capacitance structure | C2 |
| Storage capacitance | Cst |
| Show scanning signal | Sg |
| Touch scanning signals | St |
| Second time period | T2 |
| First time period | T1 |
| 3rd period | T3 |
| Step | S101、S103、S105、S107 |
Following embodiment will combine above-mentioned accompanying drawing and further illustrate the present invention.
Embodiment
Also referring to Fig. 1-3, Fig. 1 is the perspective exploded view of the display device 100 of first embodiment of the invention,
Fig. 2 is the three-dimensional assembling schematic diagram of display device 100 shown in Fig. 1, and Fig. 3 is display device 100 shown in Fig. 2 along III-III lines
Cross-sectional view.
Referring to Fig. 1, the display device 100 is used for display image, while it is additionally operable to identification and is positioned over the display device 100
Operating element, such as the element such as finger, stylus occur touch operation position, while be additionally operable to identify operating element figure
Case, such as finger print.
The display device 100 includes display module 110（As shown in Figure 2）Module 120 is sensed with ultrasonic wave（Such as Fig. 2 institutes
Show）.Wherein, the display module 110 is used for display image, and in present embodiment, the display module is a liquid crystal display die set, should
Ultrasonic wave sensing module 120 is used for sensing touch operation and fingerprint recognition.Ground is changed, the display module can also be organic
Light-emittingdiode (Organic Light-Emitting Diode, OLED) display module.
As shown in figure 1, display module 110 includes first substrate 111, second substrate 112 and is located in the first substrate 111
Layer of liquid crystal molecule 113 between second substrate 112 as display medium.
More specifically, the first substrate 111 includes first surface 111a and second surface 111b, second surface 111b
Be oppositely arranged with first surface 111a, first surface 111a be provided with the scan line G of a plurality of X in the first direction extension with it is public
Electrode wires C, the data wire D of a plurality of extensions of Y in a second direction.Second direction Y is perpendicular to first direction X, a plurality of data lines D
Intersect the pixel cell Px for forming multiple array arrangements with multi-strip scanning line G, public electrode wire C mutually insulateds.Each picture
An at least first switching element T1 and the first show electrode 101 are provided with plain unit Px, wherein, first switching element T1 is
One thin film transistor (TFT)（Thin Film Transistor, TFT）.First switching element T1 is electrically connected with scan line G, data
Line D and first show electrode 101.First switching element T1 is under the scanning signal control that scan line G is exported
Conducting state or cut-off state, when first switching element T1 is in the conduction state, first switching element T1 will be from number
According to the data signal transmission that line D is exported to first show electrode 101.
As shown in figure 3, first switching element（Do not indicate）The first surface 111a of the first substrate 111 is directly arranged at,
Data wire D is arranged at first switching element T1 surfaces, and the first show electrode 101 is set by the first insulating barrier LD1 at interval
In in the first switching element and data wire D.It is appreciated that first switching element T1 can pass through first insulating barrier LD1
On via hole（It is not shown）It is electrically connected with the first show electrode 101.
Further, as shown in Figures 1 and 2, the second substrate 112 includes the 3rd surface 112a and the 4th surface 112b, should
4th surface 112b and the 3rd surface 112a is oppositely arranged, and the 3rd surface 112a compared with the 4th surface 112b adjacent to this first
Surface 111a.Directions of the 3rd surface 112a along neighbouring first surface 111a is cascading chromatic colour filter layer CF, the
Two show electrodes 102 and the second insulating barrier LD2.Wherein, second show electrode 102 is continuous planar structure.This second
Show electrode 102 and public electrode wire C is electrically connected with, and receives a common electric voltage from the public electrode wire.
In fact, the first show electrode 101 and the second show electrode 102 and the therebetween layer of liquid crystal molecule of sandwiched
113 form a liquid crystal capacitance（It is not shown）, in image display time interval, data-signal is loaded onto the first display electricity by data wire D
Pole 101, first show electrode 101 drive according to data-signal electric field corresponding with second show electrode 102 cooperation generation
Dynamic layer of liquid crystal molecule 113 makees the deflection of respective angles, so as to show the data-signal.In present embodiment, the first display electricity
Pole 101 is pixel electrode, and second show electrode 102 is public electrode.
Referring to Fig. 1 and Fig. 2, ultrasonic wave sensing module 120 includes ultrasonic transmitting element 121 and received with ultrasonic wave
Element 122.
The ultrasonic transmitting element 121 is located at second surface 111b of the first substrate 111 away from the second substrate 112.
The ultrasonic transmitting element 121 includes ultrasonic wave transmitting element 121a, the first conductive structure 121b and the second conductive structure 121c,
The first conductive structure 121b and the second conductive structure 121c for producing pressure difference with causing ultrasonic wave transmitting element 121a to send out
Go out ultrasonic wave.In present embodiment, ultrasonic wave transmitting element 121a is located at the first conductive structure 121b and second conduction
Between structure 121c, in present embodiment, first conductive structure 121b is located at the second surface 111b of first substrate 111, should
Second conductive structure 121c is located at ultrasonic wave transmitting element 121a surface.Wherein, the first conductive structure 121b and second
Conductive structure 121c can be bonded in by colloid layer on ultrasonic wave transmitting element 121a.
The ultrasonic wave receiving element 122 is arranged at the surface away from chromatic filter layer CF of second show electrode 102,
For continuous planar structure.One second insulating barrier LD2 is arranged at the surface of ultrasonic wave receiving element 122, meanwhile, second insulation
Layer LD2 is compared with second show electrode 102 adjacent to the liquid crystal layer.In present embodiment, the ultrasonic wave receiving element 122 is used to receive
The ultrasonic signal, and the touch sense signals that the ultrasonic signal is converted to electric signal are transmitted to second show electrode
102。
In present embodiment, because ultrasonic wave receiving element 122 is arranged on the second show electrode 102, therefore, this
In the manufacturing process of two substrates 112, the ultrasonic wave receiving element 122 is led to again after second show electrode 102 completes
Cross colloid layer and be bonded in the surface of the second show electrode 102, it is right in the high temperature process of second show electrode 102 so as to prevent
The ultrasonic wave receiving element 122 causes to damage.
In present embodiment, second insulating barrier LD2 has first thickness Dp1.First show electrode 101, this second
Show electrode 102 and it is located in ultrasonic wave receiving element 122, the second insulating barrier LD2 and the liquid crystal molecule therebetween
Layer 113 forms the first capacitance structure C1（Refer to Fig. 5）.
In the touch-control sensing period, by first capacitance structure C1, the touch-control sense that first show electrode 101 will receive
Survey signal Dt to transmit to second show electrode 102, thus, data wire D can then be read this by first switching element T1 and be touched
Control sensing signal Dt.Wherein, display time interval and touch-control sensing period are in time and non-overlapping.
Preferably, the ultrasonic wave transmitting element 121a and the ultrasonic wave receiving element 122 are piezoelectric, such as poly- two
Fluorine Asia ethene（Polyvinylidene Fluoride, PVDF）.First show electrode 101 and second show electrode 102
For such as transparent conductive material (such as tin indium oxide, indium zinc oxide), silver, CNT or graphene conductive material, this is first exhausted
Edge layer LD1 and second insulating barrier LD2 can be the plastic materials such as PET.
As shown in figure 3, during using the display device 100, object under test 180（Such as finger）The display device can be positioned over
100 tops, specifically, are positioned over the 4th surface 112b of second substrate 112.
Referring to Fig. 4, Fig. 4 is the circuit block diagram of the display device 100 shown in Fig. 1, the display device 100 includes scanning
Circuit 130, data circuit 140, common electric voltage circuit 150 and reading circuit 160.The scanning circuit 130 is used for and multi-strip scanning
Line G1 ~ Gm is electrically connected with, and in display time interval, loads scanning signal successively to scan line G1 ~ Gm to control the plurality of first to open
Close element T1 conductings.Data circuit 140 is electrically connected with by a two-way switch SW and a plurality of data lines D1-Dn, at it
In any one scan line G loading scanning signal when, by first switching element T1 by data-signal Data transmit to this
One show electrode 101.The common electric voltage circuit 150 is electrically connected with public electrode wire C1 ~ Cm simultaneously, in display time interval
Outputting common voltage Vcom coordinates first show electrode 101 to show the data-signal to second show electrode 102.This
In embodiment, common electric voltage Vcom is 0V.
Reading circuit 160 is also electrically connected with two-way switch SW and a plurality of data lines D, and in the touch-control sensing period,
Touch sense signals are received by data wire D, and Treatment Analysis is carried out to the touch sense signals, to identify touch operation.
Compared to prior art, display device is directly received using second show electrode 102 in the touch-control sensing period and touched
Sensing signal Dt is controlled, while utilizes data line transfer touch sense signals to reading circuit 160, therefore, the display device structure
Simply.In addition, the ultrasonic wave receiving element 122 is arranged at the surface of the second show electrode 102 corresponding to second substrate 112, because
This, can prevent the high temperature process of the second show electrode 102 from bringing damage to the ultrasonic wave receiving element 122, effectively increase
The touch-control sensing reliability of the display device.
Also referring to Fig. 5-7, Fig. 5 is the schematic equivalent circuit of display device 100, and Fig. 6 is the display device 100
Drive waveforms figure, Fig. 7 are the driving schematic flow sheet of the display device 100.
, wherein it is desired to explanation, Fig. 5 and Fig. 6 are mainly with adjacent bar scan line Gi and Gi+1 and two adjacent numbers
According to the equivalent circuit and drive waveforms of the display device 100 exemplified by line Dj and Dj+1, other scan line G and data wire D
Waveform it is similar, therefore be not repeated to illustrate.In addition, Ul represents the first show electrode 101 in ultrasonic wave transmitting and receive process
In the oscillogram that changes over time, U2 represents what the second show electrode 202 changed over time in ultrasonic wave launches receive process
Oscillogram.
As shown in figure 5, first show electrode 101, second show electrode 102 and the liquid crystal layer being located between it
（It is not shown）And ultrasonic wave receiving element（It is not shown）One first capacitance structure C1 is formed, wherein, first capacitance structure C1
It is used to drive layer of liquid crystal molecule progress image to show in display time interval, is used to transmit the touch sense signals in the touch-control sensing period
Dt.Public electrode wire (not shown) and first show electrode 101 also form a storage capacitance Cst, storage capacitance Cst and the
One capacitance structure C1 is in parallel, for maintaining the voltage difference of the first show electrode 101 and the second show electrode 102, ensures image
Correct display.
Step S101, in first time period T1, from scan line Gi loaded and displayed scanning signal Sg, the first switching element
T1 is in the conduction state under display scanning signal Sg controls, extremely should from data wire Dj-Dj+1 loading data-signals Data
First show electrode 101, while from public electrode wire（It is not shown）Load common electric voltage（It is not shown）To second show electrode
102, first show electrode 101 drives the layer of liquid crystal molecule to show data-signal Data with second show electrode 102.Should
When explanation, for scan line Gi, when it loads display scanning signal Sg, be connected with scan line Gi all
One switch element T1 is in conducting state, meanwhile, all data wire D1-Dn are to load the data-signal simultaneously.Now, first
The voltage U2 of show electrode 101 is equal to the voltage Vd for the data-signal Data that data wire Dj/Dj+1 is loaded, the second show electrode
102 voltage U1 is equal to common electric voltage, is 0V.
Step S103, in second time period T2, stop loading data-signal Data from data wire Dj-Dj+1 first aobvious to this
Show electrode 101, while control the ultrasonic transmitting element 121 to launch ultrasonic signal.It is appreciated that in the second time period
T2, the first capacitance structure C1 remain able to maintain first time period T1 voltage under storage capacitance Cst controls, and normal display should
Data-signal Data.
Now, the ultrasonic wave receiving element 122 receives the ultrasonic signal, and the ultrasonic signal is converted into first
Receiving voltage Vp1 is transmitted to the second show electrode 102.Due to the first capacitance structure C1 charge characteristic, the first show electrode 101
Also it is charged to the first receiving voltage Vp1.
Step S105, in the 3rd period T3, the ultrasonic wave receiving element 122 reflects received from the direction of second substrate 112
Ultrasonic signal, and the ultrasonic signal is converted into the second receiving voltage Vp2 and transmitted to second show electrode 102, should
Second show electrode 102 is regard second receiving voltage Vp2 as touch sense signals Dt by the first capacitance structure C1 and passed through
First capacitance structure C1 is transmitted to first show electrode 101, and causes the voltage of the first show electrode 101 to receive electricity for second
Press Vp2.
In the 3rd period T3, touch scanning signals St to scan line Gi is loaded so that first switching element T1
It is again turned on, first show electrode 101 transmits touch sense signals Dt to data wire Dj- from first switching element T1
Dj+1.Wherein, touch scanning signals St effective time is less than display scanning signal Sg effective time.
Step S107, touch sense signals Dt is read from data wire Dj-Dj+1, known according to touch sense signals Dt
Other touch-control sensing position.Specifically, the touching signals are amplified, carry out comparison analysis after the processing such as noise reduction, so as to obtain
The no display device is to receive touch operation, and the particular location of touch operation occurs, while also according to the touch-control sensing
Signal identification goes out the specific lines image of touch operation element.
Wherein, first time period T1 is as display time interval, and second time period T2 and the 3rd period T3 are as touch-control sense
Survey the period.
Referring to Fig. 8, it changes the cross-sectional view of the display device 200 in embodiment for the present invention one.
Display device 200 includes display module 210 and ultrasonic wave sensing module 220.Display module 210 includes first substrate
211st, second substrate 212 and it is located in the layer of liquid crystal molecule between the first substrate 211 and second substrate 212 as display medium
213。
Ultrasonic wave sensing module 220 includes ultrasonic transmitting element 221 and ultrasonic wave receiving element 222, ultrasonic wave hair
Penetrate unit 221 and be arranged at the surface of the first substrate 211 away from the second substrate 212.
Ultrasonic wave is launched in the direction that the ultrasonic transmitting element 221 is used for second substrate 212, wherein, ultrasonic wave hair
The Rotating fields for penetrating unit 221 are identical with the structure disclosed in preferred embodiment.
Ultrasonic wave receiving element 222 is multiple strip structures extended along data wire D bearing of trend identicals direction, is set
In the surface of the second show electrode 202 away from chromatic filter layer CF, and each strip structure is right against data wire D,
That is projection of each strip structure on data wire D and data line overlap in ultrasonic wave receiving element 222.Second is exhausted
Edge layer LD2 is arranged at the surface of ultrasonic wave receiving element 222, meanwhile, the second insulating barrier LD2 is compared with second show electrode 202
The neighbouring layer of liquid crystal molecule 213.In present embodiment, the ultrasonic wave receiving element 222 is converted to the ultrasonic signal of reception
The touch sense signals Dt of electric signal is transmitted to the second show electrode 202, that is to say, that second show electrode 202 is additionally operable to
Receive touch sense signals Dt.The ultrasonic wave receiving element 222 is to pass through glue again after second show electrode 202 completes
Body layer is bonded in the surface of the second show electrode 202, so as to prevent the high temperature process in second show electrode 202 to the ultrasound
Ripple receiving element 222 causes to damage.
In present embodiment, second insulating barrier LD2 has first thickness Dp1.First show electrode 201, this second
Show electrode 202 and it is located in ultrasonic wave receiving element 222, the second insulating barrier LD2 and the liquid crystal molecule therebetween
Layer 213 forms the first capacitance structure C1（Figure 10）, it is used to drive layer of liquid crystal molecule 213 to carry out display image in display time interval.Separately
Outside, second show electrode 203 forms the second capacitance structure C2 with data wire D（Figure 10）, in the touch-control sensing period, by this
Two capacitance structure C2, data wire D read touch sense signals Dt from the second show electrode 202, while by the touch-control sensing
Signal Dt is transmitted to the reading circuit 160（Fig. 4）.
Referring to Fig. 9, its cross-sectional view for display device 300 in another change embodiment of the present invention.
Display device 300 includes display module 310 and ultrasonic wave sensing module 320.Display module 310 includes first substrate
311st, second substrate 312 and it is located in the layer of liquid crystal molecule between the first substrate 311 and second substrate 312 as display medium
313。
Ultrasonic wave sensing module 320 includes ultrasonic transmitting element 321 and ultrasonic wave receiving element 322, ultrasonic wave hair
Penetrate unit 321 and be arranged at the surface of the first substrate 311 away from the second substrate 312.
Ultrasonic wave is launched in the direction that the ultrasonic transmitting element 321 is used for second substrate 312, wherein, ultrasonic wave hair
The Rotating fields for penetrating unit 321 are identical with the structure disclosed in preferred embodiment.
Ultrasonic wave receiving element 322 is continuous planar structure, is arranged at second show electrode 302 and is filtered away from the colour
Photosphere CF surface.Second insulating barrier LD2 is arranged at the surface of ultrasonic wave receiving element 322, meanwhile, second insulating barrier LD2
Compared with second show electrode 302 adjacent to the layer of liquid crystal molecule 313.In present embodiment, the ultrasonic wave receiving element 322 will receive
Ultrasonic signal be converted to the touch sense signals Dt of electric signal and transmit to the second show electrode 302, that is to say, that this second
Show electrode 302 is additionally operable to receive touch sense signals Dt.The ultrasonic wave receiving element 322 is in second show electrode 302
The surface of the second show electrode 302 is bonded in by colloid layer again after completing, so as to prevent in second show electrode 202
High temperature process the ultrasonic wave receiving element 322 is caused to damage.
In present embodiment, second insulating barrier LD2 has a second thickness Dp2, and second thickness Dp2 be less than this first
Thickness Dp1.
First show electrode 301, second show electrode 302 and it is located in the ultrasonic wave therebetween and receives member
Part 322, the second insulating barrier LD2 and layer of liquid crystal molecule 313 form the first capacitance structure C1（Figure 10）, it is used to drive in display time interval
Dynamic layer of liquid crystal molecule 313 carries out display image.In addition, second show electrode 303 forms the second capacitance structure C2 with data wire D
（Figure 10）, in the touch-control sensing period, this is read from the second show electrode 302 by second capacitance structure C2, data wire D and touched
Sensing signal Dt is controlled, while touch sense signals Dt is transmitted to the reading circuit 160（Fig. 4）.
Referring to Fig. 10, its schematic equivalent circuit for the display device 200,300 as Figure 8-9, Figure 11 is such as
Display device 200 shown in Fig. 8-9,300 drive waveforms figure.
As shown in figs. 10-11, first show electrode 201,301, second show electrode 202,302 and be located in its it
Between layer of liquid crystal molecule 213,313 form the first capacitance structure C1 be used for drive layer of liquid crystal molecule 213,313 carry out image show,
In addition, second show electrode 202,302, ultrasonic wave receiving element（It is not shown）, the second insulating barrier（It is not shown）, liquid crystal molecule
Layer（It is not shown）And data wire D forms the second capacitance structure C2, goes out sensing signal Dt for transmitting this.
In first time period T1, from scan line Gi loaded and displayed scanning signal Sg, the first switching element is in the display
It is in the conduction state under scanning signal Sg controls, from data wire loading data-signal Data to first show electrode, simultaneously
From public electrode wire（It is not shown）The first control voltage V1 is loaded to second show electrode, first show electrode with this second
Show electrode drives display medium LC to show data-signal Data.It should be noted that for scan line Gi, it adds
When carrying display scanning signal Sg, all first switching elements for being connected with scan line Gi（A line）It is in conducting state,
Meanwhile all data wire D1-Dn are to load the data-signal simultaneously.Now, the voltage of ultrasonic wave output electrode is believed for data wire
Number Data voltage Vd.
In second time period T2, stop loading data-signal Data to first show electrode from data wire Dj-Dj+1
201st, 301, while control the ultrasonic wave transmitting element 212,312 to launch ultrasonic signal.It is appreciated that in the second time period
T2, the first capacitance structure C1 remain able to maintain first time period T1 voltage under storage capacitance Cst controls, and normal display should
Data-signal Data.
Now, the ultrasonic element 222,322 receives the ultrasonic wave letter of the transmitting of ultrasonic transmitting element 212,312
Number, and the ultrasonic signal is converted into the first receiving voltage Vp1 and transmitted to the second show electrode 202,302.Due to the second electricity
Hold the charge characteristic of structure C 2, the first show electrode 201,301 is also charged to the first receiving voltage Vp1.
In the 3rd period T3, the ultrasonic wave receiving element 222,322 receives the ultrasonic signal of reflection, and by the ultrasound
Ripple signal is converted to the second receiving voltage Vp2 and transmitted as touch sense signals Dt to second show electrode 202,302, by
In the second capacitance structure C2 charge characteristic, the touch sense signals are transmitted to the first show electrode by the second capacitance structure C2
201、301.Cut-off state is still within the 3rd period T3, first switching element T1.
Touch sense signals Dt is directly read from data wire D1, and touch sense signals Dt is exported to reading electricity
Road 160, the touch sense signals of reading circuit 160 Dt identification touch operations.
Compared to the display device 100 in being preferable to carry out, ultrasonic wave sensing module is except directly sharp in display device 200,300
Received with second show electrode outside touch sense signals Dt, while directly using data wire D directly from the second display electricity
Touch sense signals Dt is read in pole 202,302, it is therefore not necessary to be on except display time interval control first switching element T1
Outside, other periods are without its conducting of secondary control again, effectively prevent because the voltage of the first show electrode 201,301 sends change and
Cause light leakage phenomena to produce, further ensure the display quality of display device 200,300.
Claims (18)
1. a kind of display device, the display device includes image display module and ultrasonic wave sensing module, the image display module
The second substrate being oppositely arranged including first substrate and first substrate and the display being located between first, second substrate
Medium, the first substrate include an at least data wire and at least one first show electrode, and the second substrate includes at least one second
Show electrode, first show electrode are used to drive the display medium display image with second show electrode, it is characterised in that
Ultrasonic wave sensing module includes ultrasonic transmitting element and ultrasonic wave receiving element, the ultrasonic transmitting element be arranged at this
On one substrate and for launching ultrasonic wave, the ultrasonic wave receiving element is arranged at second show electrode away from the second substrate
Surface, transmitted for receiving the ultrasonic signal and the ultrasonic signal being converted into touch sense signals to the second display electricity
Pole, the data wire timesharing one data-signal of output to first show electrode are read with display image or from second show electrode
The touch sense signals are to identify touch operation.
2. display device as claimed in claim 1, it is characterised in that the ultrasonic wave receiving element is continuous planar structure.
3. display device as claimed in claim 2, it is characterised in that table of the ultrasonic wave receiving element adjacent to the display medium
Face also sets up the first insulating barrier, and first insulating barrier has first thickness, second show electrode and the first show electrode structure
Into capacitance structure to receive and transmit the touch sense signals.
4. display device as claimed in claim 3, it is characterised in that the first substrate also sets up at least first switch member
Part, the first switching element are electrically connected with the data wire and first show electrode, and the first switching element timesharing is on
State, first show electrode transmit the touch sense signals to the data when the first switching element is in the conduction state
Line.
5. display device as claimed in claim 4, it is characterised in that the display device timesharing is in display time interval and touch-control sense
Survey the period, the first switching element is used to first show the data signal transmission to this when the display time interval is in the conduction state
Show electrode, the first switching element transmits touch sense signals to the data when the touch-control sensing period is in the conduction state
Line.
6. display device as claimed in claim 2, it is characterised in that table of the ultrasonic wave receiving element adjacent to the display medium
Face also sets up the first insulating barrier, and first insulating barrier has second thickness, and second show electrode forms electric capacity with the data wire
Structure is to receive and transmit the touch sense signals.
7. display device as claimed in claim 3, it is characterised in that the first substrate also sets up at least first switch member
Part, the first switching element are electrically connected with the data wire and first show electrode, and the first switching element is in the display device
It is in the conduction state during in display time interval, and by the data signal transmission to first show electrode, the first switching element
Cut-off state is in when the display device is in the touch-control sensing period.
8. display device as claimed in claim 1, it is characterised in that the ultrasonic wave receiving element is multiple edges parallel to data
The strip structure of line direction extension, and each strip structure is right against the data wire in the ultrasonic wave receiving element.
9. display device as claimed in claim 8, it is characterised in that the ultrasonic wave receiving element forms electric capacity with the data wire
Structure, second show electrode form capacitance structure to receive and transmit the touch sense signals with the data wire.
10. display device as claimed in claim 9, it is characterised in that the first substrate also sets up at least first switch member
Part, the first switching element are electrically connected with the data wire and first show electrode, and the first switching element is in the display device
It is in the conduction state during in display time interval, and by the data signal transmission to first show electrode, the first switching element
Cut-off state is in when the display device is in the touch-control sensing period.
11. a kind of driving method of display device, the display device includes image display module and ultrasonic wave sensing module, the figure
As display module includes first substrate, the second substrate being oppositely arranged with first substrate and is located in first, second substrate
Between display medium, the first substrate, which includes an at least data wire and at least one first show electrode, second substrate, to be included
At least one second show electrode, first show electrode are used to drive the display medium display image with second show electrode,
Ultrasonic wave sensing module includes ultrasonic transmitting element and ultrasonic wave receiving element, the ultrasonic transmitting element be arranged at this
On one substrate and for launching ultrasonic wave, the ultrasonic wave receiving element is arranged at second show electrode away from the second substrate
Surface, it is characterised in that the driving method includes step：
In first time period, data-signal is loaded to first show electrode from the data wire, first show electrode with this
Two show electrodes drive the display medium to show the data-signal；
In second time period, stop loading data-signal to first show electrode, control ultrasonic transmitting element transmitting super
Acoustic signals；
In the 3rd period, the ultrasonic wave receiving element receives the ultrasonic signal of reflection, and the ultrasonic signal is turned
Touch sense signals are changed to, the touch sense signals are transmitted to the data wire；
The touch sense signals are read from the data wire, touch operation is identified according to the touch sense signals.
12. the driving method of display device as claimed in claim 11, it is characterised in that enter one according to the touch sense signals
Step identification fingerprint.
13. the driving method of display device as claimed in claim 11, it is characterised in that the first time period, this second when
Between section and the 3rd period it is non-overlapping in time.
14. the driving method of display device as claimed in claim 11, it is characterised in that first show electrode with this second
Show electrode forms capacitance structure, for receiving the touch sense signals.
15. the driving method of display device as claimed in claim 14, it is characterised in that the first substrate also sets up at least one
First switching element, the first switching element are electrically connected with the data wire and first show electrode, in first time period, control
The first switching element is in the conduction state, by data signal transmission to first show electrode；In second time period, control
The first switching element is in cut-off state, and stops the data signal transmission to first show electrode.
16. the driving method of display device as claimed in claim 15, it is characterised in that in the 3rd period, control this
One switch element is in the conduction state, and first show electrode receives the touch sense signals from second show electrode, and will
The touch sense signals are transmitted to the data wire.
17. the driving method of display device as claimed in claim 11, it is characterised in that the data wire and the second display electricity
Pole forms capacitance structure, for receiving the touch sense signals.
18. the driving method of display device as claimed in claim 15, it is characterised in that in the 3rd period, control this
One switch element is in cut-off state, and the data wire directly receives and exports the touch sense signals.
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| CN105046243B (en) * | 2015-08-25 | 2019-12-20 | 业成光电（深圳）有限公司 | Display device |
| CN105843446B (en) * | 2016-03-18 | 2019-10-25 | 京东方科技集团股份有限公司 | Detection components, touch control display apparatus, touch localization method and pressure detection method |
| CN106283398B (en) | 2016-10-26 | 2019-09-24 | 南方科技大学 | Method for preparing quantum rod/polymer fiber membrane by utilizing electrostatic spinning technology |
| CN106951130B (en) * | 2017-03-28 | 2019-09-03 | 京东方科技集团股份有限公司 | A kind of array substrate, display panel, display equipment and array substrate preparation method |
| CN108874244B (en) | 2017-05-12 | 2023-05-30 | 京东方科技集团股份有限公司 | Touch panel and touch device |
| CN107563306A (en) * | 2017-08-11 | 2018-01-09 | 维沃移动通信有限公司 | A kind of display module and terminal device |
| CN107589847B (en) * | 2017-09-20 | 2021-03-09 | 京东方科技集团股份有限公司 | Ultrasonic tactile feedback display device, manufacturing method and display system |
| CN109583437B (en) * | 2019-02-02 | 2020-12-04 | 京东方科技集团股份有限公司 | Display device |
| CN112395913B (en) * | 2019-08-14 | 2024-07-26 | 群创光电股份有限公司 | Electronic device |
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