CN107885364A

CN107885364A - Touch display unit and electronic equipment

Info

Publication number: CN107885364A
Application number: CN201610874831.0A
Authority: CN
Inventors: 林峰
Original assignee: Shenzhen Deep Minimally Invasive Core Technology Co Ltd
Current assignee: Zhuhai Zhongke Ruibo Medical Technology Co., Ltd
Priority date: 2016-09-30
Filing date: 2016-09-30
Publication date: 2018-04-06

Abstract

The present invention provides a kind of touch display unit and electronic equipment.The touch display unit includes touch display panel and drive circuit.The touch display panel includes multiple public electrodes, and the multiple public electrode is used as show electrode and touch-sensing electrode.The drive circuit is used to drive touch display panel execution image to show, is additionally operable to drive public electrode to perform touch-sensing.When drive circuit driving touch display panel, which performs image display, to be refreshed with touch-sensing simultaneously, signal on the touch display panel is the signal after modulated signal modulation, wherein, the drive circuit provides the common electric voltage of identical first to the multiple public electrode, while driving the multiple public electrode execution image display, and further driving public electrode to perform touch-sensing, first common electric voltage is the signal after modulated signal modulation.The electronic equipment includes the touch display unit.

Description

Touch display unit and electronic equipment

Technical field

The present invention relates to touching display technology field, more particularly to a kind of touch display unit and with it is described touch it is aobvious The electronic equipment of showing device.

Background technology

Generally, touch display unit includes external hanging type, On-Cell (box mo(u)ld top half), In-Cell (box inner mold is embedded) three The touch display panel of type.With the development of technology, in order to further such that touch display panel is thinning, and improves and touch The brightness of display panel is touched, the touch display panel of In-Cell types is increasingly becoming trend.

Illustrated so that touch display unit is liquid crystal display device as an example, generally, liquid crystal display device includes liquid crystal Show panel and shown and the drive circuit of touch-sensing for driving the liquid crystal display panel to perform image.The liquid crystal display Panel includes multi-strip scanning line, a plurality of data lines and multiple transistors, multiple pixel electrodes and multiple public electrodes.Each crystalline substance Body pipe includes grid, source electrode and drain electrode.Wherein, the grid connection scan line, the source electrode connect data wire, the drain electrode Connect pixel electrode.The drive circuit is used to provide the transistor that scanning signal is connected to scan line, activation with scan line, And gray scale voltage is provided to pixel electrode by data wire and the transistor of activation, and common electric voltage is provided to public electrode, Refresh to drive liquid crystal display panel to perform image display.

When the drive circuit provides the scanning signal to scan line, gray scale voltage is transferred to and the scan line After the one-row pixels electrode being connected, and it is referred to as going to the time slot before another scan line providing the scanning signal Gap.In other words, the drive circuit is providing gray scale voltage to another after gray scale voltage is provided to one-row pixels electrode Time slot before one-row pixels electrode is gap in the ranks.In addition, the drive circuit is providing a frame gray scale voltage to all Pixel electrode after, be alternatively referred to as interframe to the time slot before all pixel electrodes providing another frame gray scale voltage Gap.It is expert at gap, frame gap, the transmission without any gray scale voltage, i.e. show and refresh without image, correspondingly, and now, the liquid The state that LCD panel is entirely kept in image display.

Existing liquid crystal display device typically performs touch-sensing using gap of being expert to touch-sensing electrode.Usually, In order to coordinate execution touch-sensing, ensure the duration of touch-sensing, in the ranks the time of gap be typically extended.The touch-sensing electricity Pole is, for example, to be multiplexed public electrode.When public electrode multiplexing be used as touch-sensing electrode when, the drive circuit it is the commonly provided and The different touch drive signal of common electric voltage performs touch-sensing to public electrode.Generally, common electric voltage is relative to ground signalling GND (for example, 0 volt) is a constant voltage signal, and the touch drive signal is with pre- relative to the ground signalling GND The periodically variable square-wave pulse signal of frequency is determined, to improve the signal to noise ratio of touch-sensing signal.As can be seen that the liquid crystal Display device is that timesharing performs image display refreshing and touch-sensing, is shown so as to reduce image to a certain extent with touching sense Influencing each other between survey.

So, gradually stepped up with the resolution ratio of the liquid crystal display device, for example, point of the liquid crystal display device of mobile phone Resolution all gradually adopts 2K (e.g., 2560x1440) resolution ratio, the resolution ratio of even more high, and display refreshing frequency typically uses 60HZ, the gap in the ranks, frame gap can be then significantly compressed, if again using gap of being only expert at, frame gap to touch-sensing electricity Pole perform touch-sensing then can because the time it is obvious not enough cause touch-sensing fully to carry out the problem of.When refreshing frequency carries During up to 120HZ, the time available for touch-sensing is with regard to less.

The content of the invention

It is contemplated that at least solves one of technical problem present in prior art.Therefore, the present invention needs offer one Kind touch display unit and electronic equipment.

The present invention provides a kind of touch display unit, including：

Touch display panel, including multiple public electrodes, the multiple public electrode are used as show electrode and touch-sensing Electrode；With

Drive circuit, shown for driving touch display panel to perform image, be additionally operable to drive public electrode to perform touch Sensing；

It is described to touch when drive circuit driving touch display panel, which performs image display, to be refreshed with touch-sensing simultaneously It is the signal after modulated signal modulation to touch the signal on display panel, wherein, the drive circuit provides identical the One common electric voltage gives the multiple public electrode, while driving the multiple public electrode execution image display, and further Public electrode is driven to perform touch-sensing, first common electric voltage is the signal after modulated signal modulation.

Alternatively, the drive circuit is used to drive the multiple public electrode to perform self-capacitance touch-sensing.

Alternatively, the multiple public electrode is arranged in two-dimensional array.

Alternatively, the drive circuit is used to produce the modulated signal, and by using the same step of the modulated signal All signals of the touch display panel are made, while refreshing to drive the touch display panel to perform image display, are entered One step driving public electrode performs touch-sensing.

Alternatively, refresh and touch sense when the drive circuit drives the touch display panel to perform image display simultaneously During survey, all signals of the touch display panel raise, with the modulated signal with the rise of the modulated signal Reduce and reduce.

Alternatively, the drive circuit provides the common electric voltage of identical first to the multiple public electrode execution figure simultaneously As display, and timesharing receives the touch-sensing signal from the output of the multiple public electrode, to obtain touch information.

Alternatively, the relatively described modulated signal of first common electric voltage keeps constant.

Alternatively, the touch display panel further comprises multiple pixel electrodes, and the drive circuit is by providing the One gray scale voltage, to public electrode, shows to pixel electrode, the first common electric voltage of offer to drive touch display panel to perform image While showing refreshing, public electrode is further driven to perform touch-sensing, first gray scale voltage and first common electrical Pressure is the signal after the modulated signal synchronous modulation.

Alternatively, the multiple pixel electrode is located at same layer, and the multiple public electrode is located at same layer, the multiple Be stacked between pixel electrode and the multiple public electrode, the multiple public electrode and the multiple pixel electrode this two It is used to form fringe field between class electrode.

Alternatively, refresh and touch sense when the drive circuit drives the touch display panel to perform image display simultaneously During survey, along the stacked direction between the multiple pixel electrode and the multiple public electrode, the drive circuit is same Moment drives non-overlapped between the execution image display pixel electrode refreshed and the public electrode for driving execution touch-sensing.

Alternatively, the touch display unit further comprises first substrate, second substrate and display medium layer；It is described Multiple pixel electrodes are between the display medium layer and the second substrate；The multiple public electrode is located at the display Between medium layer and the multiple pixel electrode, wherein, slit is set on the multiple public electrode, or, it is the multiple public Electrode between the multiple pixel electrode and institute's second substrate, wherein, slit is set on the multiple pixel electrode.

Alternatively, the touch display panel further comprises：

Multi-strip scanning line；

A plurality of data lines, intersect with multi-strip scanning line insulation；With

Multiple transistor switches, each transistor switch include coordination electrode, the first transmission electrode and the second transmission electricity Pole, wherein, coordination electrode connection scan line, the first transmission electrode connection data wire, the second transmission electrode connection pixel electrode；

The drive circuit activates the crystal being connected with scan line by providing the first scanning open signal to scan line Pipe switchs, and provides the first gray scale voltage to pixel electrode by data wire and the transistor switch of activation, and provides first Common electric voltage refreshes and self-capacitance touch-sensing to public electrode to drive touch display panel while perform image display；

Wherein, the first scanning open signal, the first gray scale voltage, the first common electric voltage are through the modulated signal Signal after modulation.

Alternatively, the drive circuit includes public voltage generating circuit and touches drive circuit；The common electric voltage production Raw circuit is connected with the multiple public electrode alternative, and public electrode execution figure is given for providing first common electric voltage As display；The touch drive circuit is connected with the multiple public electrode alternative, for providing first common electrical Press and shown to public electrode execution touch-sensing and image.

Alternatively, the drive circuit further comprises data selection circuit, the public voltage generating circuit and described Drive circuit is touched to be connected with the multiple public electrode alternative by the data selection circuit.

Alternatively, shown and touch-sensing when the touch drive circuit drive part public electrode performs image simultaneously When, the public voltage generating circuit drives remaining all or part of public electrode to perform image and shown.

Alternatively, the drive circuit passes through institute during driving the touch display panel to show a two field picture Data selection circuit is stated, the touch drive circuit timesharing provides the first common electric voltage and performed simultaneously to the multiple public electrode Image is shown and touch-sensing, and the public voltage generating circuit timesharing provides the first common electric voltage to the multiple public electrode Image is performed to show.

Alternatively, the drive circuit is intermittent drives the multiple public electrode to perform self-capacitance touch-sensing, definition Exist public electrode perform touch-sensing period be the first period, define the multiple public electrode be performed both by image show and The period of non-executing touch-sensing was the second period.

Alternatively, in the first period, the drive circuit produces modulated signal, and utilizes the modulated signal synchronous modulation All signals of the touch display panel, shown and self-capacitance touch with driving the touch display panel while performing image Sensing；In the second period, the drive circuit is used to provide the second scanning open signal to scan line, activates and is connected with scan line The transistor switch connect, the second gray scale voltage is provided to pixel electrode, Yi Jiyong by data wire and the transistor switch of activation In providing the second common electric voltage to public electrode, shown and non-concurrent execution touch sense to drive touch display panel to perform image Survey, wherein, signal of first common electric voltage for second common electric voltage after modulated signal modulation, described first It is signal of the described second scanning open signal after modulated signal modulation to scan open signal.

Alternatively, the drive circuit includes the first earth terminal, modulation circuit and the second earth terminal, first ground connection End is connected by the modulation circuit with second earth terminal, wherein, second earth terminal is used to load ground signalling, institute Modulation circuit is stated to be used to produce the modulated signal, in the first period, the tune according to the ground signalling and a drive signal Modulated signal described in circuit output processed gives first earth terminal, and the drive circuit exports the signal to touch display panel It is using the modulated signal on the first earth terminal as voltage basis of reference, in the second period, is connect described in the modulation circuit output Earth signal gives first earth terminal, and the signal that the drive circuit is exported to touch display panel is with the first earth terminal On ground signalling be voltage basis of reference.

The present invention also provides a kind of electronic equipment, and the touch that the electronic equipment includes described in above-mentioned middle any one is shown Device.

Drive circuit due to the touch display unit is driving the touch display panel to perform image display refreshing While, further drive public electrode to perform touch-sensing, therefore, the touch display unit performs the time of touch-sensing Variable length.Correspondingly, the better user experience of the electronic equipment with the touch display unit.

Brief description of the drawings

Fig. 1 is the structure schematic diagram of electronic equipment of the present invention.

Fig. 2 is the waveform diagram of an embodiment of the part signal of electronic equipment shown in Fig. 1.

Fig. 3 is the electrical block diagram of an embodiment of electronic equipment shown in Fig. 1.

Fig. 4 is the electrical block diagram of an embodiment of modulation circuit shown in Fig. 3.

Fig. 5 is the electrical block diagram of the signal source of existing touch drive circuit.

Fig. 6 is the electrical block diagram for the signal source that drive circuit is touched shown in Fig. 3.

Fig. 7 is the electrical block diagram of an embodiment of electronic equipment shown in Fig. 1.

Fig. 8 is the decomposition texture schematic diagram of an embodiment of touch display panel shown in Fig. 7.

Fig. 9 is the cross-sectional view of touch display panel shown in Fig. 8.

Figure 10 is the cross-sectional view of another embodiment of touch display panel shown in Fig. 7.

Figure 11 is the schematic top plan view of touch display panel shown in Figure 10.

Figure 12 is the structured flowchart of an embodiment of signal processing circuit shown in Fig. 3.

Figure 13 is the structural representation of an embodiment of a signal processing unit of signal processing circuit shown in Figure 12.

Figure 14 is the structural representation of the another embodiment of electronic equipment of the present invention.

Figure 15 is the electrical block diagram of an embodiment of protection circuit shown in Figure 14.

Figure 16 is the electrical block diagram of another embodiment of protection circuit.

Embodiment

It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings to the present invention Specific embodiment be described in detail.However, example embodiment can be implemented in a variety of forms, and it is understood not to limit In embodiment set forth herein；On the contrary, these embodiments are provided so that the present invention fully and completely, and example will be implemented The design of mode is comprehensively communicated to those skilled in the art.It is for convenience or clear, it may exaggerate, omit or schematically show Go out every layer shown in the accompanying drawings of thickness and size and the quantity for schematically illustrating related elements.In addition, the size of element Not exclusively reflection actual size, and the quantity of related elements not exclusively reflect actual quantity.Because the originals such as accompanying drawing is of different sizes Cause, in different drawings shown same or similar or related elements quantity there is a situation where not consistent.The phase in figure Same reference represents same or similar structure.So, it is necessary to illustrate, in order that obtaining label has regular and patrols Property etc. is collected, in some different embodiments, same or similar element or structure employ different references, according to technology Relevance and related text explanation, those skilled in the art is can directly or indirectly to judge to learn.

In addition, described feature, structure can be incorporated in one or more embodiments in any suitable manner. In the following description, there is provided many details fully understand so as to provide to embodiments of the present invention.However, ability Field technique personnel will be appreciated that it is one or more in no specific detail, or using other structures, constituent element etc., Technical scheme can also be put into practice.In other cases, known features or operation are not shown in detail or describe to keep away Exempt from the fuzzy present invention.

Further, following term is exemplary, it is not intended that is limited in any way.Read the application it Afterwards, it would be recognized by those skilled in the art that the statement of these terms suitable for technology, method, physical component and system (no matter mesh It is preceding whether to know), including those skilled in the art are inferred to after reading the application or educible its extends.

In the description of the invention, it is to be understood that：It is " multiple " to include two and two or more, it is " a plurality of " to include two With more than two, " more " include two and more than two, and " multirow " is included more than two rows and two rows, " multiple row " include two row with More than two row, unless the application separately has clearly specific limit.In addition, occur in each element title and signal name " the One ", the word such as " second ", " the 3rd ", " the 4th " is not to limit the sequencing that element or signal occur, but for convenience of member Part is named, and clearly distinguishes each element so that description is more succinct understandable.Obscure in order to avoid understanding, it is necessary to further explanation in advance Have：

For display device, display device includes display panel and drive circuit.The drive circuit is used to drive The display panel performs image and shown.The display panel generally includes multiple pixels, and each pixel includes the first electricity Pole and second electrode, during work, the pressure difference between the first electrode and the second electrode determines the display gray scale of pixel Rank.Wherein, the first electrode of the multiple pixel is, for example, the structure that is integrated of being connected to each other, and is a flood electrode, institute The second electrode for stating multiple pixels is structure separate.The drive circuit passes through the first electricity to each pixel Pole provides identical voltage (being, for example, 0 volt), and the second electrode to each pixel provides different voltage, so as to realize The image of different GTGs is shown.

When the display device is liquid crystal display device, the first electrode is public electrode, and the second electrode is Pixel electrode.The drive circuit by provide common electric voltage to first electrode, gray scale voltage be provided driven to second electrode Liquid crystal display panel performs image and shown.Ground is changed, the display device is alternatively the display device of other suitable types, example Such as display device of electronic paper.

For each pixel, its image display status generally comprises image and shows that Flushing status and image display are protected Hold state.By taking single pixel as an example, when the drive circuit provide gray scale voltage to second electrode, provide common electric voltage to the During one electrode, the pixel starts to perform image display refreshing, after the gray scale voltage is write to second electrode, stops Gray scale voltage is provided to the second electrode, image display, which refreshes, to be completed.Afterwards, the pixel enters image display holding shape State, until the pixel receives gray scale voltage next time.

It should be noted that the process that image display refreshes can further comprise entering second electrode line precharge or put in advance Electricity, the gray scale voltage for realizing predetermined grey menu is provided again after the second electrode of same a line reaches same voltage to the second electricity Pole.

As can be seen that for image display refreshes, as when receiving common electric voltage, second electrode has first electrode The process of gray scale voltage write-in.

Usually, the multiple pixel is for example arranged in determinant.The drive circuit generally drives line by line or by row Pixel performs image display and refreshed.

It is noted that image display refreshes shows both different dispaly states of holding from image, it is to be best understood from down The embodiments of the present invention are prepared described in face.In addition, more clearly " image display refreshes " and " image display is kept " are two The different technological concept of kind.

It should be noted that the specific call of first electrode, second electrode in different types of display device is not Together, for the display device for each suitable type for being applicable the application, it is public electrode to unitedly call first electrode, unitedly calls the second electricity Extremely pixel electrode.Correspondingly, it is common electric voltage that the drive circuit, which is supplied to the display voltage signal of first electrode, there is provided is given The display voltage signal of second electrode is gray scale voltage.

Touch-screen generally comprises the touch-screen of the several types such as resistance-type, condenser type, infrared-type, wherein, capacitive touch The application for touching screen is more extensive.Capacitive touch screen includes mutual capacitance type touch screen and self-capacitance touch screen again.

In the touch system based on mutual capacitance, touch-screen may include (such as) driving area and sensing area, such as drives line And sense wire.In an example case, drives line can form multirow, and sense wire can form multiple row (for example, orthogonal).Touch picture Element may be disposed at the intersection of row and column.During operation, the row, and mutually electricity can be encouraged with AC signal (AC) waveform Appearance can be formed between the row and column of the touch pixel.When an object is close to the touch pixel, the touch pixel is coupled in Some electric charges between row and column can be changed to coupled on the object.This reduction for the electric charge being coupled in the touch pixel can be led Cause the only reduces of mutual capacitance between row and column and the reduction for the AC waveforms being coupled in the touch pixel.Charged Couple AC waveforms This reduction can be detected and measured by touch system to judge position of the object when touching the touch-screen.

Relatively, in the touch system based on self-capacitance, each pixel that touches can be by forming of self-capacitance over the ground Other electrode is formed.When an object is close to the touch pixel, another direct-to-ground capacitance (capacitance to ground) can be formed Between the object and the touch pixel.Another direct-to-ground capacitance can cause having a net increase of for the self-capacitance that the touch pixel is subjected to Add.This self-capacitance increase can be detected and measured by touch system to judge position of the object when touching the touch-screen.

Below, various embodiments of the present invention are illustrated.

Also referring to Fig. 1 and Fig. 2, Fig. 1 is the structure schematic diagram of electronic equipment of the present invention.Fig. 2 is electronics shown in Fig. 1 The waveform diagram of one embodiment of the part signal of equipment.The electronic equipment 100 is as being portable electronic product, intelligence The product of the various suitable types such as household electric product and vehicle electronics product, the invention is not limited in this regard.It is described to take Formula electronic product is, for example, mobile phone, tablet personal computer, notebook computer, Wearable etc..The smart home electronic product For example, desktop computer, refrigerator, washing machine, TV etc..The vehicle electronics product is, for example, navigator, vehicle-carrying DVD etc.. The electronic equipment 100 includes touch display unit 1.The touch display unit 1 is used to realize that image is shown and touch-sensing. The touch display unit 1 is the touch display unit of In-Cell (box inner mold is embedded) type.The touch display unit Display device in 1 is, for example, liquid crystal display device.Correspondingly, the touch display unit 1 is touch liquid crystal display device.Under Face mainly illustrates by taking touch liquid crystal display device as an example.So, with changing, the display dress in the touch display unit 1 Put the display device for being alternatively other suitable types, e.g., display device of electronic paper (EPD) etc..

The touch display unit 1 includes touch display panel 10 and drive circuit 20.The touch display panel 10 wraps Include multiple public electrodes 101.The multiple public electrode 101 is used as show electrode and touch-sensing electrode.The drive circuit 20 and the multiple public electrode 101 connect respectively, show for driving the multiple public electrode 101 to perform image, also use Touch-sensing is performed in driving the multiple public electrode 101.It is preferred that the drive circuit 20 is used to drive the multiple public affairs Common electrode 101 performs self-capacitance touch-sensing.So, the invention is not limited in this, the drive circuit 20 can also be used to drive The multiple public electrode 101 performs the touch-sensing of other suitable types, and for example, mutual capacitance touch senses, as long as it is based on Techniques disclosed in this application thought and other changes for doing or extension all should fall into the protection domain of the application.

The multiple public electrode 101 is for example arranged in two-dimensional array, and specifically, the multiple public electrode 101 is along X side Arranged to Y-direction in multiple lines and multiple rows, wherein, the X-direction is line direction, and the Y-direction is column direction.So, ground is changed, In other embodiments, the multiple public electrode 101 also can be in that Else Rule or non-regular are arranged, and the present invention is to this It is not limited.

The drive circuit 20 is used in driving the touch display panel 10 to perform the arbitrary process that image is shown, Public electrode 101 can be further driven to perform self-capacitance touch-sensing.Therefore, even if when the display of touch display unit 1 is differentiated Rate improves, and can't also shorten the time of touch-sensing, and then, break the touch-sensing time caused by display resolution increase Inadequate technical bottleneck.Correspondingly, the user experience of the electronic equipment 100 is preferable.

In particular, the drive circuit 20 can enter while driving touch display panel 10 to perform image display refreshing One step driving public electrode 101 performs self-capacitance touch-sensing.So as to which the touch-sensing of touch display unit 1 is not limited in In the ranks gap I, frame gap are carried out.

It is described to touch when the drive circuit 20 driving touch display panel 10 performs image simultaneously to be shown with touch-sensing It is the signal after modulated signal MGND modulation to touch all electric signals on display panel 10.The touch display panel 10 On each electric signal for example raised with the rise of the modulated signal MGND, dropped with the reduction of the modulated signal MGND It is low.

The drive circuit 20 is for example by using touch display panel 10 described in the modulated signal MGND synchronous modulations All signals, while to drive the touch display panel 10 to perform image display, further drive the multiple public Electrode 101 performs self-capacitance touch-sensing.

It is described to touch when the drive circuit 20 driving touch display panel 10 performs image simultaneously to be shown with touch-sensing Touch the element on display panel 10 or directly driven by the drive circuit 20, or driven indirectly by the drive circuit 20.With Exemplified by an element on touch display panel 10, when the element is directly driven by the drive circuit 20, on the element Signal be come driving circuit 20 output modulated signal MGND modulation after signal；When the element is not driven circuit During 20 direct drive, then for example driven indirectly by Capacitance Coupled driven circuit 20, Capacitance Coupled is present in driven circuit Between the element that the element and driven circuit 20 of 20 direct drives drive indirectly, correspondingly, the signal of the element is because of electric capacity Coupling is superimposed the modulated signal MGND.So as to which all electric signals on the touch display panel 10 are through the modulation Signal after signal MGND modulation.Except Capacitance Coupled, the element in the touch display panel 10 for example can also pass through resistance Driven indirectly Deng element driven circuit 20.

So, ground is changed, in other embodiments, all electric signals on the touch display panel 10 also can be The signal come after the modulation of the output of driving circuit 20.

The drive circuit 20 for example provides identical the first common electric voltage Vc1 and performed to the multiple public electrode 101 While image is shown, public electrode 101 can be further driven to perform self-capacitance touch-sensing.The first common electric voltage Vc1 For the signal after modulated signal MGND modulation.For example, the first common electric voltage Vc1 and the modulated signal MGND it Between pressure difference keep it is constant.The relatively described modulated signal MGND of the first common electric voltage Vc1 keep constant.So, ground is changed, The first common electric voltage Vc1 is alternatively the signal of the relative change of pressure difference between the modulated signal Vc1.It is preferred that institute Stating the first common electric voltage Vc1, relative to ground signal GND is the signal changed.The ground signalling GND is, for example, the perseverance of 0V (volt) Determining voltage signal, but 0V constant voltage signal is not limited to, or the constant voltage signal close to 0V, the ground signalling GND is usually the voltage signal of the equipment ground of electronic equipment 100.The equipment it is also known as systematically, for example, electronic equipment The negative pole of 100 power supply, power supply is as being battery.The ground signalling GND is also known as system ground voltage, systematically believed Number, equipment ground voltage or equipment earth signal etc..Generally, the equipment not earth ground or definitely greatly.So, electronics is worked as May also be the equipment earth ground when equipment 100 is connected by conductor with earth ground.

By taking a public electrode 101 as an example, shown when drive circuit 20 drives the public electrode 101 while performs image During with touch-sensing, there is provided the first common electric voltage Vc1 to the public electrode 101 is simultaneously as display drive signals with touching Drive signal；When drive circuit 20 drive the public electrode 101 perform image show and it is non-concurrent perform touch-sensing when, carry The first common electric voltage 101 for supplying the public electrode 101 is non-concurrent as touch drive signal as display drive signals.

The drive circuit 20 can drive the multiple timesharing of public electrode 101 to perform touch-sensing, can also drive described Multiple public electrodes 101 perform touch-sensing simultaneously.

Correspondingly, when the drive circuit 20 drives the multiple public electrode 101 while performs touch-sensing, there is provided The first common electric voltage Vc1 to the multiple public electrode 101 is simultaneously as touch drive signal；When the drive circuit 20 When driving the multiple timesharing of public electrode 101 execution touch-sensing, there is provided first to the multiple public electrode 101 is public Voltage Vc1 is not while as touch drive signal.Therefore, drive circuit 20 can be also claimed to drive public electrode 101 to perform First common electric voltage Vc1 of touch-sensing is touch drive signal.

When the timesharing of drive circuit 20 drives the multiple public electrode 101 to perform touch-sensing, although the drive Dynamic circuit 20 provides identical the first common electric voltage Vc1 to the multiple public electrode 101, but is driven in the drive circuit 20 Dynamic public electrode 101 performs image and shows that performing image with driving public electrode 101 with the circuit structure of touch-sensing shows simultaneously Show and it is non-concurrent perform touch-sensing circuit structure be different.

Because all electric signals on the touch display panel 10 are after the modulated signal MGND synchronous modulations Signal, therefore, it is modulated in all electric signals after display drive signals the touch display panel 10 can be driven to perform Normal picture shows, and it is modulated after display drive signals, for example, the first common electric voltage Vc1, further can be applicable simultaneously Self-capacitance touch-sensing is performed in driving public electrode 101.Correspondingly, the drive circuit 20 is in driving touch display panel 10 Perform in the arbitrary process that image is shown, can drive touch display panel 10 to perform touch-sensing, and the touch-sensing is not The normal display of image can be influenceed.Further, even if when the display resolution raising of touch display unit 1, can't also contract The time of short touch sensing, so as to improve the user experience of electronic equipment 100.

, can be referring now to Fig. 7, between the public electrode 101 and pixel electrode 103 of pixel 11 in order to more fully understand Display pressure difference for, the signal on public electrode 101 and pixel electrode 103 is when by the modulated signal MGND synchronous modulations Afterwards, display pressure difference will not change, and image is normally shown, and it is through described to be supplied to the first common electric voltage Vc1 of public electrode 101 Signal after modulated signal MGND modulation, signals of the first common electric voltage Vc1 relative to ground signalling GND for change, from And public electrode 101 can be driven to perform self-capacitance simultaneously during 10 normal display image of touch display panel is ensured and touched Touch sensing.

For the pixel 11 that the pixel 11 refreshed for performing image display is kept with execution image display, figure is performed The signal on pixel electrode 103 as showing the pixel 11 refreshed is the letter come after the modulation that driving circuit 20 is provided Number, the signal on the pixel electrode 103 for the pixel 11 that image display is kept is performed because Capacitance Coupled is superimposed the modulated signal MGND。

The touch display unit 1 is, for example, high definition (HD) display device, full HD (FHD) display device, ultra high-definition (UHD) various types of display devices such as display device, accordingly, display resolution be, for example, 1280x720,1920x1080, 3840x2160, so, the display resolution are not limited thereto, for example, when display resolution is 2K, 2K can be 1920x1080, so, or the various suitable conditions such as 2560X1440.Similarly, when display resolution is 4K, 8K, also may be used It is that can be performed simultaneously tactile in the arbitrary process that image is shown for touch display unit 1 so including a variety of situations Sensing is touched, and touch-sensing does not influence normal image and shown.That is, touch display unit 1 can perform image simultaneously and show and oneself Capacitance touch senses.

In particular, the drive circuit 20 can drive when driving the touch display panel 10 to perform image display refreshing Dynamic public electrode 101 together performs self-capacitance touch-sensing, obtains touch information.Image display refreshes and self-capacitance touch-sensing Between can coexist simultaneously, and the image of touch display unit 1 show it is higher with the quality of touch-sensing.

Because the signal on the touch display panel 10 is by the modulated signal MGND synchronous modulations, and it is modulated after First common electric voltage Vc1 can be used as display drive signals simultaneously with touching drive signal, and therefore, the touch display unit 1 can Image display refreshing and self-capacitance touch-sensing are performed simultaneously, and the image of the touch display unit 1 is shown and touch-sensing Between and in the absence of interference or interference it is smaller.

In addition, show what is refreshed when being in non-image under driving of the touch display panel 10 in the drive circuit 20 During state, for example, in the ranks gap I (as shown in Figure 2), frame gap when, the drive circuit 20 also can drive public electrode 101 together Perform self-capacitance touch-sensing.Now, the state that the touch display panel 10 is entirely kept in image display, due to using The modulated signal MGND exports to drive circuit 20 synchronizes modulation to the signal of touch display panel 10, therefore, performs Touch-sensing can't change the display pressure difference between two electrodes 101,103 of pixel 11 (see Fig. 7), correspondingly, touch The image of display panel 10 shows preferable with the quality of touch-sensing.

Due to the drive circuit 20 in driving the touch display panel 10 to perform the arbitrary process that image show, it is equal Public electrode 101 can be driven together to perform touch-sensing, therefore, manufacturer can drive circuit 20 drives described in sets itself as needed Dynamic public electrode 101 performs the period of touch-sensing.Specifically, for example, in the whole process or partial routine that image is shown, Perform touch-sensing.More specifically, for example, during image display refreshes and/or in the ranks during gap I, frame gap, touch is performed Sensing, etc..

In the present embodiment, the drive circuit 20 drives the multiple public electrode 101 to perform image and shown simultaneously, And timesharing drives the multiple public electrode 101 to perform self-capacitance touch-sensing.

It should be noted that for the multiple public electrode 101 as generally speaking, the drive circuit 20 is timesharing The multiple public electrode 101 is driven to perform self-capacitance touch-sensing.So, for the portion in the multiple public electrode 101 Divide for public electrode 101, the drive circuit 20 can be drive part public electrode 101 simultaneously and perform touch-sensing.Example Such as, the drive circuit 20 drives a part of public electrode 101 in the multiple public electrode 101 to perform touch simultaneously every time Sensing, by successively repeatedly driving, complete a touch-sensing to all public public electrodes 101.So, ground, institute are changed Stating drive circuit 20 can also drive a public electrode 101 to perform touch-sensing every time.

In this application, either one public electrode 101 of driving performs touch-sensing to drive circuit 20 every time, or every time Drive part public electrode 101 performs touch-sensing simultaneously, as long as the drive circuit 101 is described more by successively repeatedly driving Individual public electrode 101 has performed a touch-sensing, that is, defines the drive circuit 20 and drive the multiple common electrical for timesharing Pole 101 performs touch-sensing.

Specifically, the drive circuit 20 provides the first common electric voltage Vc1 to the multiple public electrode simultaneously 101, and timesharing receives the touch-sensing signal from the output of the multiple public electrode 101, to realize while drive described more Individual public electrode 101 performs image and shown, and timesharing drives the multiple public electrode 101 to perform self-capacitance touch-sensing.

So, ground is changed, in other embodiments, the drive circuit 20 can also drive the multiple common electrical simultaneously Pole 101 is performed both by image and shown and touch-sensing.

The multiple public electrode 101 is driven to perform self-capacitance touch-sensing for the timesharing of drive circuit 20, such as Can be：The drive circuit 20 performs self-capacitance touch-sensing by row driving public electrode 101.When the drive circuit 20 provides When the first common electric voltage Vc1 performs self-capacitance touch-sensing with image display to a line public electrode 101, also described in offer First common electric voltage Vc1 performs image to the public electrode 101 of remaining row and shown.When the drive circuit 20 driving a line is public After electrode 101 has performed self-capacitance touch-sensing, next, driving the public electrode 101 of another row to perform self-capacitance touches sense Survey and shown with image, and drive the public electrode 101 of remaining row to perform image and show.In this way, by successively repeatedly, completing to institute The touch-sensing driving of some public electrodes 101.

The drive circuit 20 can drive public electrode 101 to perform image line by line and show and touch-sensing, also can be once same When drive multirow public electrode 101 to perform image to show and touch-sensing.

Sense is touched because the timesharing of drive circuit 20 (e.g., by row or line by line) driving public electrode 101 performs self-capacitance Survey, therefore, be integrated with the drive circuit 20 chip output pin then compared to and meanwhile drive all public electrodes 101 To perform the output pin of chip of self-capacitance touch-sensing will lack, so as to reduce the chip for being integrated with the drive circuit 20 Area, and then cost-effective purpose.

In various embodiments, the drive circuit 20 can once drive a line public electrode 101 to perform and touch sense Survey, also can once drive multirow public electrode 101 to perform touch-sensing, can once drive all public electrodes 101 simultaneously again Perform touch-sensing.In addition, the drive circuit 20 also not can perform touch-sensing by row driving public electrode 101, for example, Touch-sensing is performed by row driving public electrode 101 or drives public electrode 101 to perform touch by the type of drive of non-rule Situations such as sensing etc., is also possible.

Further, the multiple public electrode 101 is driven to perform self-capacitance touch-sensing for the timesharing of drive circuit 20： Described each driving public electrode 101 of drive circuit 20 is continuous continual between performing touch-sensing, i.e. drive circuit 20 After drive part public electrode 101 has performed touch-sensing at the same time, then, while another part public electrode 101 is driven Perform touch-sensing；Or the intermittent the multiple public electrode 101 of driving of drive circuit 20 performs self-capacitance touch-sensing, Such as, drive circuit 20 performs touch-sensing up to after first scheduled time, stopping performing touch-sensing in driving public electrode 101 Driving then, then drives public electrode 101 to perform touch-sensing up to second scheduled time.

So, when the drive circuit 20 drives the multiple public electrode 101 to perform touch-sensing simultaneously, can also use Intermittent type of drive.That is, reached when the drive circuit 20 drives the multiple public electrode 101 to perform touch-sensing simultaneously After first scheduled time, stop performing touch-sensing driving up to second scheduled time, then, then drive the multiple public affairs simultaneously Common electrode 101 performs touch-sensing.

The drive circuit 20 can be also driven by the way of driving simultaneously is combined to the multiple common electrical using timesharing It is also possible that pole 101 performs touch-sensing.

It should be noted that the public electrode 101 that the drive circuit 20 performs touch-sensing in adjacent driving twice can Partly overlap or non-overlapping.

In particular, the multiple public electrode 101 is driven to perform self-capacitance touch for the drive circuit 20 is intermittent The mode of sensing, the period that definition has the execution touch-sensing of public electrode 101 is the first period W1, is defined the multiple public Electrode 101 be performed both by image show and it is non-concurrent perform touch-sensing period be the second period W2.The first adjacent period W1 Between include the second period W2.For example, first period W1 and second period W2 are alternately.

In the first period W1, the drive circuit 20 touches display surface using described in the modulated signal MGND synchronous modulations The signal of plate 10, correspondingly, the drive circuit 20 export it is modulated after the first common electric voltage Vc1 it is same to public electrode 101 Shi Zhihang images are shown and self-capacitance touch-sensing.

For the ease of carrying out understanding differentiation with the signal of the second following period W2, the drive circuit 20 is defined first It is the first signal that period W1, which is exported to the signal of the touch display panel 10, defines the drive circuit 20 in the second period It is secondary signal that W2, which is exported to the signal of the touch display panel 10,.Correspondingly, first signal includes described first Common electric voltage Vc1.

In every one second period W2, the drive circuit 20 exports secondary signal and performs figure to the touch display panel 10 As display.

It is preferred that in the second period W2, the drive circuit 20 does not utilize the modulated signal MGND synchronous modulations institute State the signal of touch display panel 10.Correspondingly, first signal is, for example, the secondary signal through the modulated signal Signal after MGND modulation.The drive circuit 20 exports first signal to the touch display panel 10 while execution figure As display and self-capacitance touch-sensing.

The secondary signal includes the second common electric voltage Vc2.In the second period W2, the output of drive circuit 20 second is public Common voltage Vc2 performs image to the multiple public electrode 101 and shown.

The first common electric voltage Vc1 is, for example, the second common electric voltage Vc2 after modulated signal MGND modulation Signal.Relative to ground signal GND is, for example, constant voltage signal to the second common electric voltage Vc2.Filled for liquid crystal display For putting, the second common electric voltage Vc2 is, for example, (- 1) V, so, for other types of display device, described second Common electric voltage Vc2 is alternatively the voltage signal of other sizes.The modulated signal MGND is, for example, to change between 0 volt to 1.8 volts Signal.So, the invention is not limited in this, the signal such as the modulated signal MGND, described second common electric voltage Vc2 is alternatively The signal of other suitable types, has related description below.

Due to not touched in the second period W2, the drive circuit 20 using described in the modulated signal MGND synchronous modulations The signal of display panel 10 is touched, for example, be driven using existing display type of drive, therefore, the touch display unit 1 Relative reduction power consumption is wanted using the technical scheme of modulation compared in the first period W1 in the second period W2.

From the foregoing, drive circuit 20 drives the multiple public electrode 101 to perform touch-sensing using intermittent Mode, the touch display unit 1 not only can perform self-capacitance touch-sensing in the arbitrary process that execution image is shown, also may be used Avoid as far as possible because causing power consumption larger using modulation scheme.

In the first period W1, the drive circuit 20 for example drives multirow public electrode 101 to perform touch-sensing, or Person, all public electrodes 101 are driven to perform a touch-sensing, or, drive all public electrodes 101 to perform more Secondary touch-sensing.In the case of the drive circuit 20 drives all public electrodes 101 to perform multiple touch-sensing again A variety of situations can be divided into, for example, the drive circuit 20 drives all public electrodes 101 to perform the number phase of touch-sensing Together, or, the number that the drive circuit 20 drives a part of public electrode 101 to perform touch-sensing is identical, and driving is another The number that part public electrode 101 has performed touch-sensing is identical, and so, the drive circuit 20 drives this two parts public electrode 101 have performed the number difference of touch-sensing.

It should be noted that：Second period W2 duration sets that the whole detection of touch display unit 1 need to be touched and grasped Make and influence is not present, conversely can also reduce power consumption to a certain extent.

The duration of each first period W1 is for example identical, and the duration of each second period W2 is for example identical.So, described each first when Section W1 duration also can be not fully identical or different each other, and the duration of each second period W2 also can be not fully identical It is or different each other.In addition, for different types of touch display unit 1, for the different touch display unit 1 of size, right The first period W1, the second period W2 in the different touch display unit 1 of material can also correspond to difference.Further, for institute State touch display unit 1 and be operated in different states, for example, blank screen holding state and bright screen image display status, described first Period W1, the second period W2 duration are set also can be different, to reduce power consumption.

So, ground is changed, in some embodiments, in the second period W2, the drive circuit 20 also can be used still The signal of touch display panel 10 carries out display driving described in the modulated signal MGND synchronous modulations.

Mainly the multiple public electrode 101 is driven to perform touch-sensing with the intermittence of drive circuit 20 and timesharing below Mode, touch display unit 1 and its operation principle are illustrated.

Referring to Fig. 3, Fig. 3 is the electrical block diagram of an embodiment of the electronic equipment 100.The drive Dynamic circuit 20 includes modulation circuit 21, public voltage generating circuit 22, touches drive circuit 23, data selection circuit 24, control Circuit 25 and signal processing circuit 26.The public voltage generating circuit 22 and the touch drive circuit 23 connect the number According to selection circuit 24.The data selection circuit 24 connects the multiple public electrode 101.The control circuit 25 and the number It is connected according to selection circuit 24.The public voltage generating circuit 22 and the touch drive circuit 23 are selected by the data Circuit 24 is alternative to connect corresponding public electrode 101.

The public voltage generating circuit 22 is used to drive the execution image of public electrode 101 to show.

Drive circuit 23 is touched to be used to drive same public electrode 101 while perform image and show to touch with self-capacitance to feel Survey.

The signal processing circuit 26 is used to be carried out according to the touch-sensing signal that the touch drive circuit 23 is exported Touch coordinate calculates, and obtains touching position information.

For the data selection circuit 24 under the control of the control circuit 25, corresponding selection exports the common electric voltage production Signal performs image to corresponding public electrode 101 and shown caused by raw circuit 22, and selects output is described to touch driving Signal caused by circuit 23 performs image to corresponding public electrode 101 and shown and self-capacitance touch-sensing.

The control circuit 25 is corresponding to control the data selection circuit 24 for example according to the control signal of main control chip 3 Signal output sequential.

The modulation circuit 21 is used to produce the modulated signal MGND.The modulated signal MGND is, for example, square-wave pulse Signal, including the first reference signal and the second reference signal.The voltage condition of first reference signal and the second reference signal Can be any one in following five kinds of situations：

First：The voltage of first reference signal is positive voltage, and the voltage of the second reference signal is 0V；

Second：The voltage of first reference signal is 0V, and the voltage of the second reference signal is negative voltage；

3rd：The voltage of first reference signal is positive voltage, and the voltage of the second reference signal is negative voltage, first ginseng Examine absolute value of the absolute value equal or different to the voltage of second reference signal of the voltage of signal；

4th：First reference signal, the voltage of the second reference signal are positive voltage of different sizes；

5th：First reference signal, the voltage of the second reference signal are negative voltage of different sizes.

Using ground signalling GND as reference, first reference signal, the second reference signal are constant voltage signal.Institute State the square-wave pulse signal that modulated signal is alternately present for the first reference signal with the second reference signal.

The modulated signal MGND is, for example, periodically variable square-wave pulse signal.The modulated signal MGND not offices It is limited to square-wave pulse signal, or other suitable waveform signals, for example, sine wave signal, two level stairstep signal etc..Institute State modulated signal MGND and be also not limited to periodically variable signal, or the signal of aperiodic change.

In the present embodiment, the first reference signal of the modulated signal MGND is ground signalling GND, second ginseng It is the drive signal higher than the first reference signal to examine signal.For example the ground signalling GND is 0V, the drive signal is 1.8V.So, the ground signalling be 0V, the drive signal be that 1.8V is an example, can be done according to the situation of product pair The adjustment of amplitude is answered, the present invention is not limited to this.

Specifically, the drive circuit 20 can further comprise voltage generation circuit 27.The voltage generation circuit 27 is used In generation second reference signal.The modulation circuit 21 produces with connecting the equipment of the electronic equipment 100 with the voltage Raw circuit 22, the ground signalling GND of the equipment ground and the second reference signal caused by the voltage generation circuit 22 are received, It is corresponding to produce the modulated signal MGND.To distinguish ground signalling GND, the modulated signal is denoted as MGND.

In the present embodiment, the drive circuit 20 is by providing the modulated signal MGND in drive circuit 20 Partially, all signals of synchronous modulation touch display panel 10 are reached.As long as that is, this partly on signal for modulation Signal MGND, all signals of the touch display panel 10 are synchronously changed into the letter after the modulated signal MGND is modulated Number.

It is defined on the first period W1 and is applied with modulated signal MGND ground as modulation ground, ground signalling is applied with difference GND equipment.Correspondingly, in the first period W1, the electronic equipment 100 is using two domains as voltage reference.Two Domain is shown as the domain 80 on the basis of ground signalling GND and the domain on the basis of modulated signal MGND 90.Wherein, to connect The earth terminal of the circuit in domain 80 on the basis of earth signal GND is used to load ground signalling GND, using modulated signal MGND as base The earth terminal of circuit in accurate domain 90 is used for load-modulate signal MGND.Further, for being with modulation the circuit on ground, The modulated signal MGND that its ground reference by modulation loads；Circuit for taking equipment as ground, its ground reference The ground signalling GND by equipment loaded.

That is, in the first period W1, modulation ground is modulated to modulated signal MGND by ground signalling GND, to modulate added by ground The modulated signal MGND of load is modulated by the equal modulated signals MGND of all signals of reference data.

Relatively, in the second period W2, the electronic equipment 100 is using a domain as voltage reference, with ground connection Signal GND is voltage reference.The ground of circuit in the electronic equipment 100 with being all connected with equipment, receives ground signalling GND.That is, in the second period W2, the modulation ground is corresponding with being changed into equipment, for transmitting ground signalling GND and unmodulated signal MGND。

It is predeclared to be, in the present embodiment, in the first period W1, the public voltage generating circuit 22, touch Drive circuit 23, data selection circuit 24 and control circuit 25 are located in the domain 90, and the modulation circuit 21 and voltage produce Circuit 27 is located in the domain 80.A part for the signal processing circuit 26 is located in domain 80, and a part is located in domain 90.

The modulation circuit 21 includes modulated terminal M.The modulation circuit 21 exports the modulation by the modulated terminal M to be believed Number MGND is given to the earth terminal of each circuit in domain 90, so as to using modulated signal MGND as in the domain 90 of voltage basis of reference Signal after circuit output modulated signal MGND modulation gives the touch display panel 10.Wherein, the modulated terminal M connections are adjusted System ground, or one end as modulation ground.In addition, the element on touch display panel 10 for instance in vacant state is (e.g., aftermentioned to hold Row image display keep pixel electrode 103, see Fig. 7) on signal as because Capacitance Coupled effect be superimposed as described in modulated signal MGND.Therefore, all electric signals on the first period W1, the touch display panel 10 are changed into through the modulated signal Signal after MGND modulation.

Circuit in domain 90, for example, the public voltage generating circuit 22, touch drive circuit 23, data selection electricity Partial circuit in road 24, control circuit 25, the signal processing circuit 26, if including earth terminal, earth terminal can directly connect It is connected to modulation ground.

In the second period W2, the modulation circuit 21, public voltage generating circuit 22, drive circuit 23, data choosing are touched It is using ground signalling GND as Voltage Reference to select circuit 24, control circuit 25, signal processing circuit 26, voltage generation circuit 27 Benchmark.

Correspondingly, in the first period W1, the modulation circuit 21 is according to the ground signalling GND of equipment ground and from described The drive signal of voltage generation circuit 27 correspondingly produces the modulated signal MGND, and provides the modulated signal MGND to described Modulation ground.The public voltage generating circuit 22 is corresponding to produce the first common electric voltage Vc1, and selects electricity by the data Road 24 is supplied to corresponding public electrode 101 to perform image and shown.The touch drive circuit 23 is corresponding to produce first public affairs Common voltage Vc1, and be supplied to corresponding public electrode 101 to perform image by the data selection circuit 24 and show and self-capacitance Touch-sensing.The signal processing circuit 26 receives the touch-sensing signal exported from the touch drive circuit 23, to obtain Take touch information.That is, the described drive circuit 23 that touches exports the first common electric voltage Vc1 to public electrode 101 while is used as aobvious Show that drive signal exports the first common electrical to public electrode 101 with touching drive signal, the public voltage generating circuit 22 Pressure Vc1 is used only as display drive signals.

The touch drive circuit 23 is exported to the multiple public electrode 101 with the public voltage generating circuit 22 First common electric voltage Vc1 is the identical signal after modulated signal MGND modulation, and the touch drive circuit 23 can Further transmission touches letter from the touch-sensing signal that public electrode 101 is sensed to signal processing circuit 26 to obtain Breath, therefore, the drive circuit 20 can drive the touch display panel 10 while perform image and show and self-capacitance touch Sensing.

Because the touch drive circuit 23 is supplied to the first common electric voltage Vc1 of public electrode 101 to be both used as touching driving Dynamic signal, is used as display drive signals, therefore, is held in the drive part public electrode 101 of public voltage generating circuit 22 again When row image is shown, the touch drive circuit 23 can together drive remaining public electrode 101 to perform image and show and self-capacitance Touch-sensing.Therefore, touch display unit 1 of the invention can perform simultaneously among the arbitrary process that image is shown is performed Touch-sensing, and, touch-sensing and image are noiseless between showing or interference caused by being shown to image is less.

Further, carried in the second period W2, the public voltage generating circuit 22 by the data selection circuit 24 Image is performed for the second common electric voltage Vc2 to the multiple public electrode 101 to show.

It is preferred that in the second period W2, the data selection circuit 24 is controlled by the control circuit 25, it is the multiple The second common electric voltage Vc2 on public electrode 101 is all from the public voltage generating circuit 22.The touch drive circuit 23 Such as the second common electric voltage Vc2 can be further exported to data selection circuit 24, but data selection circuit 24 selects output to come from Second common electric voltage Vc2 of the public voltage generating circuit 22 to public electrode 101, so as to so that it is described to touch display dress 1 is put to show and non-executing touch-sensing in the second period W2 execution images.

By first period W1 and second period W2 alternately, the touch display unit 1 realizes image Display and touch-sensing.

During a two field picture is shown, the touch display unit 1 may include the first period W1, multiple first Period W1, a first period W1 part, first period W1 and the first period W1 part or multiple first periods W1 and the first period W1 part.

The touch drive circuit 23 is different from the circuit structure of the public voltage generating circuit 22, so as to even if institute State and touch drive circuit 23 and be supplied to the signal of public electrode 101 identical with the public voltage generating circuit 22, but, it is and described Touch-sensing electrode can be further used as by touching the public electrode 101 that drive circuit 23 is connected.

The touch-sensing signal for touching the further reception of drive circuit 23 and being exported from public electrode 101, and according to Touch-sensing signal obtains touch information.

Specifically, may be in response to the public electrode 101 that electrically connects of touch drive circuit 23 target object (for example, The suitable objects such as finger) touch or whether approach, it is corresponding export different touch-sensing signals and give touch-sensing driving Circuit 23, correspondingly, the touch drive circuit 23 can obtain touch information according to touch-sensing signal.

Relatively, the public voltage generating circuit 22 does not receive the signal from public electrode 101, or, even if The signal from public electrode 101 is received, but based on the circuit structure of of public voltage generating circuit 22 itself, regardless of public electrode Whether 101 tops have target object to touch or approach, what the public electrode 101 electrically connected with public voltage generating circuit 22 exported Signal is basically unchanged, so as to obtain touch information.

It is preferred that the public voltage generating circuit 22 shares same signal source 221, institute with the touch drive circuit 23 Signal source 221 is stated to be modulated by the modulated signal MGND, it is corresponding to produce one first reference voltage signal.The common electric voltage production Raw circuit 22 exports the common electrical of identical first with the touch drive circuit 23 according to first reference voltage signal is corresponding Pressure Vc1 give the multiple public electrode 101, wherein, the public electrode 101 being electrically connected with public voltage generating circuit 22 performs Image is shown and non-concurrent execution touch-sensing, with touching public electrode 101 while the execution figure that drive circuit 23 is electrically connected As display and self-capacitance touch-sensing.

Because the touch drive circuit 23 is provided with the identical signal of public voltage generating circuit 22 to common electrical Pole 101, therefore, the touch drive circuit 23 is while driving public electrode 101 to perform self-capacitance touch-sensing, not shadow The public electrode 101 of sound execution self-capacitance touch-sensing performs normal image and shown.Further, since the common electric voltage produces Circuit 22 with it is described touch drive circuit 23 share same signal source 221, therefore, the public voltage generating circuit 22 with it is described Touch drive circuit 23 export can reach to the signal of the multiple public electrode 101 it is identical or essentially identical, so that it is guaranteed that touch Touch the quality that sensing is shown with image.

In some specific embodiments, the public voltage generating circuit 22 is for example including signal source 221, follower 222 and mu balanced circuit 223.The signal source 221 is connected with the follower 222, the follower 222 further with it is described Data selection circuit 24 connects.One end of the mu balanced circuit 223 is connected to the follower 222 and the data selection circuit Between 24, the other end is connected with the modulation.

The signal source 221 includes earth terminal a and output end b.The earth terminal a is connected with the modulation.It is described defeated Go out to hold b to be connected with the follower 222.The signal source 221 is, for example, DC source, and so, the present invention is not limited to this, institute State signal source 221 or other suitable circuit structures.

The follower 222 transmits signal that the signal source 221 exports to the data selection circuit 24, and passes through institute Stating data selection circuit 24 is supplied to the corresponding execution of public electrode 101 image to show.The follower 222 for example, first is put Big device, so, the invention is not limited in this, the follower 222 or other suitable circuit structures, it is not limited to institute State the first amplifier.In the embodiment, illustrated so that follower 222 is the first amplifier as an example.Described One amplifier 222 includes the 3rd power end c1, the 3rd earth terminal d1, the first in-phase end e1, the outputs of the first end of oppisite phase f1 and first Hold g1.Wherein, the 3rd power end c1 is used for loading power voltage VDD1.The 3rd earth terminal d1, which is used to connect, to be modulated Ground.The first in-phase end e1 is used to be connected with the output end b of the signal source 221.The first end of oppisite phase f1 and described the One output end g1 short circuits.The first output end g1 is connected with the data selection circuit 24.

The mu balanced circuit 223 is connected between the first output end g1 and modulation ground, for the follower 222 Voltage between the data selection circuit 24 carries out voltage stabilizing.In the present embodiment, the mu balanced circuit 223 for example including Electric capacity of voltage regulation Cw.The electric capacity of voltage regulation Cw is connected between the first output end g1 and the modulation ground.

During work, in the first period W1, the earth terminal a and the 3rd earth terminal d1 receive the modulated signal MGND, The signal source 221 is corresponding to export first reference voltage signal to first amplifier 222 by the output end b, First amplifier 222 is in empty short status, then it is public with the first reference voltage signal identical first to correspond to output Voltage Vc1 gives the data selection circuit 24, is supplied to corresponding public electrode 101 to perform by the data selection circuit 24 Image is shown.

In the second period W2, the earth terminal a and the 3rd earth terminal d1 receive the ground signalling GND, the signal Source 221 is corresponding to export the second reference voltage signal to first amplifier 222, first amplification by the output end b Device 222 is in empty short status, then corresponds to transmission with the second common electric voltage of the second reference voltage signal identical Vc2 to described Data selection circuit 24, and be supplied to the multiple public electrode 101 to perform image by the data selection circuit 24 and show.

The touch drive circuit 23 is for example including the signal source 221 and multiple operational amplifiers 231.Each computing is put Big device 231 includes the second amplifier 232 and feedback branch 233.Second amplifier 232 includes the 4th power end c2, the 4th Earth terminal d2, the second in-phase end e2, the second end of oppisite phase f2 and the second output end g2.Wherein, the 4th power end c2 is used to add Carry supply voltage VDD2.The 4th earth terminal d2 is used to connect modulation ground.The second in-phase end e2 is used for and the signal The output end b connections in source 221.The second end of oppisite phase f2 is connected with the data selection circuit 24, and further by described Feedback branch 233 is connected with the second output end g2.The second output end g2 further with the signal processing circuit 26 Connection.

The feedback branch 233 is for example including feedback capacity 233a and Resetting Switching 233b.It is preferred that the feedback capacity The 233a and Resetting Switching 233b is connected in parallel between the second end of oppisite phase f2 and the second output end g2.

During work, in the first period W1, the 4th earth terminal d2 receives the modulated signal MGND.Second amplification Device 232 is in empty short status, receives the first reference voltage signal from the signal source 221, and corresponding output described first Common electric voltage Vc1 gives the data selection circuit 24, and corresponding public electrode is supplied to by the data selection circuit 24 101.The feedback branch 233 is used to transmit touch-sensing signal that public electrode 101 senses to the signal processing circuit 26。

By the touch-sensing signal can equally be modulated by the modulated signal MGND, when the signal processing circuit When 26 pairs of touch-sensing signals carry out analysis calculating, back-modulation can be carried out to the touch-sensing signal as needed, to obtain Take touch coordinate information.

The number of the multiple operational amplifier 231 is for example identical with the columns of the multiple public electrode 101.Each fortune Calculate amplifier 231 and pass through the corresponding public electrode 101 that the row of connection one may be selected of the data selection circuit 24.So, it is the multiple The number of operational amplifier 231 also can be identical with the line number of the multiple public electrode 101.In addition, the present invention not as Limit, for example, the public electrode 101 of each row also can corresponding selection connect two operational amplifiers 231 etc. embodiment be also can With.

The offer of touch drive circuit 23 of the present invention and the first common electric voltage Vc1 phases caused by public voltage generating circuit 22 Same touch drive signal is to public electrode 101, so as to which the touch drive signal can drive public electrode 101 both to perform Image is shown and performs self-capacitance touch-sensing, and therefore, the multiple public electrode 101 of the touch display unit 1 is being held While row image is shown, touch-sensing can be further performed.

Further, each letter is distinguished compared to the touch drive circuit 23 and the public voltage generating circuit 22 Number source, because the touch drive circuit 23 and the public voltage generating circuit 22 of the application share same signal source 221, Therefore, the touch drive circuit 23 is exported to institute with the public voltage generating circuit 22 by the data selection circuit 24 State multiple public electrodes 101 the first common electric voltage Vc1 can more towards identical or can reach identical, so that it is guaranteed that it is described touch it is aobvious The image of showing device 1 is shown and the quality of touch-sensing.

So, in some change embodiments, the touch drive circuit 23 also may be selected and produced with the common electric voltage Circuit 22 distinguishes each circuit structures such as a signal source.

In the second period W2, with being changed into equipment, the signal source 221 export the second reference voltage signal to following on modulation ground Device 222 and the multiple operational amplifier 231, the control circuit 25 control the data selection circuit 24 to select output to come from The second common electric voltage Vc2 on the common electric voltage electricity production road 22 performs image to the multiple public electrode 101 and shown.

Further, in some change embodiments, also first can be set between signal source 221 and follower 222 Switch (not shown), second switch (not shown) is set between signal source 221 and operational amplifier 231, accordingly, first Period W1, first switch are in closure state, the second period W2 with second switch, and the first switch is in closure, described Second switch be in opening may also be can with.

The data selection circuit 24 is for example including one first data selector 241 and multiple second data selectors 242. The follower 222 is connected with first data selector 241, first data selector 241 with it is the multiple public Electrode 101 connects respectively.Each operational amplifier 231 connects one second data selector 242, every one second data selection respectively Device 242 connects a row public electrode 101 respectively.First data selector 241 and the multiple second data selector 242 It is respectively connecting to the control circuit 25.The control circuit 25 controls first data selector 241 and the multiple The signal output sequential of two data selectors 242.

Citing, the multiple public electrode 101 are to be arranged in the matrix form of 26 rows 40 row, accordingly, the multiple computing The quantity of amplifier 231 is 40, and the quantity of second data selector 242 is 40.First data selector 241 includes First output port O1, for exporting the signal from the public voltage generating circuit 22 to corresponding public electrode 101.Institute It is identical with the line number of the multiple public electrode 101 to state the first output port O1 quantity, as 26.Every one second data choosing Selecting device 242 includes the second output port O2, for exporting the signal from the touch drive circuit 23 to corresponding common electrical Pole 101.The quantity of the second output port O2 is identical with the line number of the multiple public electrode 101, as 26.Need It is bright, in fig. 2, it is limited to the size of diagram, part circuit structure is actually only shown, for example, only showing 2 operation amplifiers 231,2 the second data selectors 242 of device, and part public electrode 101.

In the present embodiment, the second output port O2 of every one second data selector 242 connects a common electrical respectively Pole 101.Every one first output port O1 be respectively connecting to one second output port O2 of each second data selector 242 with it is public Between electrode 101, so as to save connecting line L quantity, the first different output port O1 connects different second each other Output port O2.

So, with changing, in other embodiments, the quantity of first data selector 241 is alternatively multiple, and One is not limited to, correspondingly, the first output port O1 of the multiple first data selector 241 and the multiple second number It can correspond to and adjust according to the annexation between the second output port O2 of selector 242, such as, every one first data selector 241 are connected with the second data selector of part 242, so, or, the first output end of every one first data selector 241 Mouthful O1 is connected, etc. with part the second output port O2 of the multiple second data selector 242.

In the first period W1, the multiple second data selector 242 is 26 numbers for selecting 1 under the control of control circuit 25 According to selector, correspondingly, output is public from touch drive circuit 23 described first every time for every one second data selector 242 Voltage Vc1 gives a public electrode 101, and by 26 times, the multiple second data selector 242 drives all public electrodes 101 have performed a touch-sensing.First data selector 241 is 26 data for selecting 25 under the control of control circuit 25 Selector, when the multiple second data selector 242 export the first common electric voltage Vc1 give with a line public electrode 101 when, First data selector 241 exports the first common electric voltage Vc1 from public voltage generating circuit 22 to remaining each row Each public electrode 101.It should be noted that the touch driving of 26 times can be to be completed in the first period W1 of one or more.

In the second period W2, first data selector 241 is changed into 26 numbers for selecting 26 under the control of control circuit 25 According to selector, the second common electric voltage Vc2 from the public voltage generating circuit 22 is exported to whole public electrodes 101.Institute The second data selector 242 is stated to stop outputing signal to public electrode 101 for example under the control of control circuit 25.

The touch drive circuit 23 and public voltage generating circuit 22 of the touch display unit 1 are not limited to above-mentioned Circuit structure, or other suitable circuit structures.For example, the data selection circuit 24 is not limited to the choosing of the first data Select the data selector 242 of device 241 and second, or other suitable switching circuit structures.

By the data selection circuit 24, on the one hand can reduce drive circuit 20 and the multiple public electrode 101 it Between connecting line L quantity, on the one hand also can reach while driving the multiple public electrode 101 to perform image display, Timesharing driving public electrode 101 performs touch-sensing.

As it was previously stated, the touch display unit 1 or image are shown with touch-sensing in lasting progress, example Such as, in time, the public voltage generating circuit 22 persistently provides first common electric voltage with touching drive circuit 23 Vc1 is to public electrode 101, and spatially, the public voltage generating circuit 22 is engaged drive with the touch drive circuit 23 Move the multiple public electrode 101.In other words, without the second period W2, the corresponding control of the control circuit 25 first number Remain that 26 select 25 according to selector 241, control the multiple second data selector 242 to remain that 26 select 1.

In another example also only it can persistently drive the multiple public electrode 101 execution figure simultaneously by selection touch drive circuit 23 As display and touch-sensing, public voltage generating circuit 22 is omitted.

Further, when the multiple public electrode 101 is arranged in Else Rule or non-regular, the data choosing Select between circuit 24, the public voltage generating circuit 22, the touch drive circuit 23 and the multiple public electrode 101 Relation can do corresponding adjustment, and for those of ordinary skill in the art, according to the technology contents of the disclosure above, being can be with Reasonable expectation goes out corresponding circuit information, therefore, here is omitted.

In addition, in some embodiments, the drive circuit 20 can for example further comprise fingerprint drive circuit, described Fingerprint drive circuit is alternative to connect the multiple public electrode 101, when the drive circuit 20 is in drive part common electrical Pole 101 performs touch-sensing and image and shown simultaneously when, the fingerprint drive circuit also can drive part public electrode 101 simultaneously Perform fingerprint sensing to show with image, the drive part public electrode of public voltage generating circuit 22 performs image and shown.Therefore, originally In application, what driving public electrode 101 worked is not limited to public voltage generating circuit 22 and touches drive circuit 23, can be with Circuit including other suitable types or proper function, it is corresponding to drive public electrode 101 to perform corresponding function.

Also referring to Fig. 3 and Fig. 4, Fig. 4 is the electrical block diagram of an embodiment of the modulation circuit 21.Institute Stating modulation circuit 21 includes the first active switch 211, the second active switch 213 and control unit 215.Wherein, first active open Closing 211 includes control terminal K1, the first transmission end T1 and the second transmission end T2, and the second active switch 213 includes control terminal K2, the One transmission end T3 and the second transmission end T4.Control terminal K1, K2 is connected with control unit 215.First active switch 211 The second transmission end T2 be connected with the first transmission end T3 of the second active switch 213 and in defining an output node on connecting line N, the first transmission end T1 of the first active switch 211 receive the first reference signal, the second transmission end T4 of the second active switch 213 The second reference signal is received, described control unit 215 is by controlling first, second active switch 211,213 to be controlled come corresponding Make the output node N and alternately export first reference signal and second reference signal, to form modulated signal MGND.

In the present embodiment, first reference signal is ground signalling GND, and second reference signal is believed for driving Number.Correspondingly, the second transmission end T4 is connected with the voltage generation circuit 27, and the first transmission end T1 with equipment connects Connect, be used to export the modulated signal MGND to modulation for receiving ground signalling GND, the node N.

The active switch 213 of first active switch 211 and second is as being thin film transistor (TFT), triode, metal oxide The switch of the suitable types such as semiconductor field.

The operation principle of the modulation circuit 21 is：In the first period W1, described control unit 215 is used to control the tune Circuit 21 processed exports modulated signal MGND to the ground in domain 90, and the ground in this time domain 90 is modulation ground；It is described in the second period W2 Control unit 215, which is used to controlling the modulation circuit 21 export ground signalling GND, gives modulation ground, is now changed into and equipment to modulation Ground is identical.

It should be further stated that in the first period W1, the electronic equipment 100 have one using ground signalling GND as The reference field 80 of benchmark and a reference field 90 on the basis of modulated signal MGND, for touch display unit 1, due to described While the offer pumping signal of drive circuit 23 is touched to public electrode 101, further receive and come from the public electrode 101 The touch-sensing signal of body output, to obtain touch information, therefore, the touch drive circuit 23 is driving the touch display Principle during the execution touch-sensing of panel 10 is self-capacitance touch-sensing principle.

When electronic equipment 100 uses two domains 80,90 on the basis of GND and MGND, not only touch display panel 10 Signal modulated by Integral synchronous and make it that signal to noise ratio is improved, and the drive circuit 23 that touches is in certain in domain 90 A little circuit structures correspondingly can be also simplified, and then can also simplify circuit structure, save product cost.For example, to touch Said exemplified by the signal source 221 of drive circuit 23 and the existing signal source 221a (seeing below Fig. 5) for touching drive circuit It is bright.

Also referring to Fig. 5 and Fig. 6, Fig. 5 is the signal source 221a of existing touch drive circuit circuit structure signal Figure.Fig. 6 is the electrical block diagram for the signal source 221 for touching drive circuit 23.Need to illustrate in advance, existing touch At work, signal source 221a is using ground signalling GND as voltage reference to drive circuit.The touch drive circuit of the application During 23 work, signal source 221 is using modulated signal MGND as voltage reference.Signal source 221a includes current sources la, resistance Ra, first switch K1a, second switch K2a.Wherein, current sources la is connected in series in power end P1 with equipment GND with resistance Ra Between.First switch K1a one end is connected between current sources la and resistance Ra, and the other end, which is connected to, touches the same of drive circuit Phase end h.Second switch K2a one end is connected between first switch K1a and in-phase end h, and the other end is connected to be connect for loading Earth signal GND equipment.It is corresponding to produce touch-sensing by controlling first switch K1a and second switch K2a alternate conduction Drive signal gives in-phase end h.Wherein, relative to the equipment GND keeps constant to the power end P1.

Relatively, the signal source 221 includes current source Ib and resistance Rb, and the current source Ib and resistance Rb is connected in series Between power end P2 and ground for load-modulate signal MGND.Touch the receiving terminal of drive circuit 23, i.e. the second in-phase end G2, it is connected between the current source Ib and resistance Rb.Because the modulated signal MGND is change, therefore, power end P2, Output voltage between the current source Ib and resistance Rb changes with the modulated signal MGND of modulation ground change, from And the corresponding touch-sensing drive signal that produces gives the second in-phase end g2.In addition, also can be in such as modulation between power end P2 Increase electric capacity, to keep the stability of signal.

Compared to signal source 221a, the circuit structure of signal source 221 becomes simple, and is touched caused by signal source 221 Touching sensing drive signal will stablize compared to touch-sensing drive signal caused by signal source 221a.

Also referring to Fig. 2, Fig. 3 and Fig. 7, Fig. 7 is the circuit knot of an embodiment of the electronic equipment 100 Structure schematic diagram.As it was previously stated, in this embodiment, the touch display unit 1 is said by taking liquid crystal display device as an example It is bright.So, ground, when the touch display unit 1 is other types of display device, the touch display unit 1 are changed Circuit structure can correspond to all differences, in addition, the circuit structure of different liquid crystal display devices can also be not quite similar, but for this The those skilled in the art in field, which can correspondingly derive the structure learnt easily, all should fall into the protection domain of the application.In this embodiment party In formula, the touch display panel 10 of the touch display unit 1 includes multiple pixels 11.Each pixel 11 is in the driving It is used to performing image under the driving of circuit 20 and shows and touch-sensing.Each pixel 11 includes the public electrode 101, pixel Electrode 103 and switch element 104.In the present embodiment, the switch element 104 includes controlling switch 105.The control Switch 105 includes coordination electrode G, the first transmission electrode S and the second transmission electrode D.The coordination electrode G and described first is passed Transmission pole S is connected with the drive circuit 20.The second transmission electrode D is connected with the pixel electrode 103.The driving electricity Road 20 is used to drive the conducting of controlling switch 105 and cut-off.In the present embodiment, the switch element 104 includes a control System switch 105, so, in other embodiments, the switch element 104 may also comprise two controlling switches 105 or more control System switch, so, can also further comprise other circuit elements, such as storage circuit etc..Two controlling switch 105 is, for example, to go here and there Connection connection.

The controlling switch 105 is, for example, thin film transistor switch.The thin film transistor switch is, for example, low-temperature polysilicon Silicon thin film transistor switch, amorphous silicon film transistor switch, indium gallium zinc (IGZO) thin film transistor switch, high temperature polysilicon Silicon thin film transistor switch etc..So, the present invention is not limited thereto, the controlling switch 105 or other suitable types Switch.When controlling switch 105 is thin film transistor switch, coordination electrode G is the grid of thin film transistor switch, and first passes Transmission pole S is the source electrode of thin film transistor switch, and the second transmission electrode D is the drain electrode of thin film transistor switch.

In the present embodiment, each pixel 11 includes a pixel electrode 103 and a controlling switch 105 respectively.Due to The generally large size in pixel electrode 103 of size of public electrode 101, correspondingly, multiple pixels 11 share same public Electrode 101.So, in other change embodiments, or each pixel 11 includes a public electrode 101 respectively.

In the first period W1, the drive circuit 20 by providing the first scanning open signal Vg1 to controlling switch 105, Drive the controlling switch 105 to turn on, and the first gray scale voltage Vd1 is provided to pixel electrode by the controlling switch 105 of conducting 103, there is provided the first common electric voltage Vc1 is refreshed to public electrode 101 with driving the pixel 11 to perform image display.Wherein, First scanning open signal Vg1, the first gray scale voltage Vd1 and the first common electric voltage Vc1 are through the tune Signal after signal MGND synchronous modulations processed.

Generally, the drive circuit 20 drives the multiple pixel 11 to perform image display and refreshed by row.At first Section W1, when the drive circuit 20, which drives the pixel 11 of certain a line to perform image display, to be refreshed, the drive circuit 20 is logical Cross the controlling switch 105 for providing the first scanning pick-off signal Vg2 to the pixel 11 of remaining row so that the pixel of remaining row The controlling switch 105 of point 11 is ended, so as to so that the pixel 11 of remaining row is in image and shows hold mode.Wherein, The first scanning pick-off signal Vg2 is the signal after modulated signal MGND modulation.

Usually, the multiple pixel 11 is arranged in a manner of multiple lines and multiple rows.So, the multiple pixel 11 also can be in Else Rule or non-regular arrangement.

To avoid touch-sensing from showing the interference refreshed to image, it is preferred that the drive circuit 20 drives execution simultaneously Non-overlapping between the pixel 11 of touch-sensing and the pixel 11 for performing image display refreshing, shown for example, performing image Predetermined row is spaced between the pixel 11 of refreshing and the public electrode 101 for performing touch-sensing and is performing the picture of image display holding Vegetarian refreshments 11.Controlled by software or hardware or software and hardware, to realize that the pixel 11 for performing touch-sensing is shown with performing image Preset distance can be kept between the pixel 11 of refreshing and non-overlapping.

So, ground is changed, in other embodiments, performs the pixel 11 of image display refreshing in drive circuit 20 It also may be selected to perform touch-sensing simultaneously under driving, or, while perform the pixel 11 of image display refreshing and perform touch Also selectable portion is overlapping between the pixel 11 of sensing, partly overlapping situation be, for example, between pixel 11 completely or partially Share a public electrode 101.

Relatively, in the second period W2, the drive circuit 20 for example provides the second scanning open signal Vg3 and opened to control 105 are closed, activates controlling switch 105, and the second gray scale voltage Vd2 is provided to pixel electrode by the controlling switch 105 of activation 103, there is provided the second common electric voltage Vc2 performs image display to public electrode 101 and refreshed.When the drive circuit 20 drive it is a certain When capable pixel 11 performs image display refreshing, there is provided controls of the second scanning pick-off signal Vg4 to the pixel 11 of remaining row The cut-off of system switch 105, so as to so that the pixel 11 of remaining row is in image and shows hold mode.

The first scanning open signal Vg1 is, for example, the second scanning open signal Vg3 through the modulated signal Signal after MGND modulation.The first scanning pick-off signal Vg2 is, for example, the second scanning pick-off signal Vg4 through the tune Signal after signal MGND modulation processed.

The first gray scale voltage Vd1 is corresponding second gray scale voltage Vd2 after modulated signal MGND modulation Signal.For example, when one first gray scale voltage Vd1 be the second gray scale voltage Vd2 through the modulated signal MGND modulation after signal, Then, the pressure difference between the second gray scale voltage Vd2 and the second common electric voltage Vc2 is equal to the first gray scale voltage Vd1 and the first common electrical Press the pressure difference between Vc1.

For each pixel 11：Pressure difference between first pixel electrode 103 and the public electrode 101 determines each picture The display gray scale of vegetarian refreshments 11 is other.For liquid crystal display device, it is not polarized in order that obtaining liquid crystal molecule, for same aobvious Show grey level, gray scale voltage can be divided into positive polarity gray scale voltage and negative polarity gray scale voltage.

The touch display panel 10 can further comprise multi-strip scanning line 281 and a plurality of data lines 291.It is described a plurality of to sweep It is, for example, the cross arrangement that insulate to retouch line 281 and a plurality of data lines 291.The multi-strip scanning line 281 is for example prolonged in X direction Stretch, arranged along Y-direction.The a plurality of data lines 291 for example extends along Y-direction, arranges in X direction.Distinguish per scan line 281 Connect the coordination electrode G of the controlling switch 105 of one-row pixels point 11.Each data wire 291 connects a row pixel 11 respectively First transmission electrode S of controlling switch.

The multi-strip scanning line 281 is used to transmit the first scanning open signal Vg1 from the drive circuit 20, second Scan the control of open signal Vg3, the first scanning pick-off signal Vg2 or the second scanning pick-off signal Vg4 to controlling switch 105 Electrode G.The a plurality of data lines 291 is used to transmit from the first gray scale voltage Vd1 of the drive circuit 20 or the second GTG First transmission electrode Ss of the voltage Vd2 to controlling switch 105.

The drive circuit 20 further comprises display driver circuit 20a, for driving the touch display panel 10 to hold Row image is shown.The display driver circuit 20a includes scan drive circuit 28, generation circuit of scanning signals 28a, data-driven Circuit 29 and the public voltage generating circuit 22.The scan drive circuit 28 connects the multi-strip scanning line 281.It is described Data drive circuit 29 connects a plurality of data lines 291.The scan drive circuit 28 and the data drive circuit 29 are equal It is connected with the control circuit 25.When the control circuit 25 is further used for controlling the scanning of the scan drive circuit 28 Sequence, and corresponding display data is provided to the data drive circuit 29.The generation circuit of scanning signals 28a is swept with described Drive circuit 28 is retouched to connect.The generation circuit of scanning signals 28a is used to produce the first scanning open signal Vg1, second Open signal Vg3, the first scanning pick-off signal Vg2 or the second scanning pick-off signal Vg4 are scanned, and first scanning is provided Open signal Vg1, the second scanning open signal Vg3, the first scanning pick-off signal Vg2 or the second scanning pick-off signal Vg4 are to institute State scan drive circuit 28.The scan drive circuit 28 such as circuit structure including shift register, receive and carry out self-scanning Signal generating circuit 28a scanning open signal and scanning pick-off signal, and correspond to offer under the control of control circuit 25 and sweep Open signal and scanning pick-off signal are retouched to corresponding scan line 281.

In the present embodiment, during work, in the first period W1, the generation circuit of scanning signals 28a, the scanning are driven Dynamic circuit 28 and data drive circuit 29 also are located in domain 90.The generation circuit of scanning signals 28a is by the modulation circuit 21 Modulated signal MGND modulation export the first scanning open signal Vg1, the first scanning pick-off signal Vg2 to described Scan drive circuit 28, the scan drive circuit 28 corresponding output first scanning under the SECO of control circuit 25 Open signal Vg1, the first scanning pick-off signal Vg2 give corresponding scan line 281 respectively, the data drive circuit 29 by The modulated signal MGND of the modulation circuit 21 modulation, the first gray scale voltage Vd1 is exported to a plurality of data lines 291, it is supplied to corresponding pixel electrode 103 to perform image display with the controlling switch 105 by activation and refreshes.The common electrical Generation circuit 22 and the touch drive circuit 23 is pressed to provide the first common electric voltage Vc1 to institute by the data selection circuit 24 State multiple public electrodes 101.

In addition, the signal on the pixel electrode 103 of the pixel 11 kept in image display is acted on by Capacitance Coupled It is changed into the signal modulated through the modulated signal MGND.Therefore, the pixel electricity of each pixel 11 of the touch display panel 10 Pole 103 is changed into the signal after the modulated signal MGND synchronous modulations with the signal on public electrode 101.So as to described Drive circuit 20 can drive public affairs simultaneously in driving the touch display panel 10 to perform the arbitrary process that normal picture is shown Common electrode 101 performs touch-sensing.

For example, when the scan drive circuit 28 provides the first scanning open signal Vg1 to scan line 281, The public voltage generating circuit 22 provides the first common electric voltage Vc1 and shown to the execution image of part public electrode 101, institute Touch drive circuit 23 the first common electric voltage Vc1 of offer is stated to show and self-capacitance touch to remaining public electrode 101 execution image Sensing.

Compared to the touch display unit for the Incell types that existing multiplexing public electrode performs touch-sensing, the application Touch display unit 1 by using the modulated signal MGND synchronous modulations touch display panel 10 all signals, so as to So that it can be further used as touching drive signal, therefore, the drive for the signal for driving the execution image of public electrode 101 to show Dynamic circuit 20 can similarly perform certainly when providing the first scanning open signal Vg1 to scan line 281 to public electrode 101 Capacitance touch senses, and correspondingly, touch display unit 1 is not necessarily limited by the gap I that is expert at, frame gap drives public electrode 101 Touch-sensing is performed, so as to have the time of execution touch-sensing not for the display device that display resolution improves Enough technical problems.In addition, the touch display unit 1 performs touch-sensing in the arbitrary process of display image, to image Normal display without influence or influence it is smaller.

It should be noted that the drive circuit 20 is exported to the first common electric voltage Vc1 of the multiple public electrode 101 All same, and, the first common electric voltage Vc1 is compared to the signal that ground signalling GND is change, so as to use described the One common electric voltage Vc1 is further used as touching drive signal, and correspondingly, the drive circuit 20 is held in driving public electrode 101 While row normal picture is shown, public electrode 101 can be further driven to perform self-capacitance touch-sensing.

In addition, in the second period W2, the generation circuit of scanning signals 28a outputs the second scanning open signal Vg3, The second scanning pick-off signal Vg4 gives the scan drive circuit 28, and the scan drive circuit 28 is in control circuit 25 The lower corresponding scanning open signal of output second Vg3 of control, the second scanning pick-off signal Vg4 give corresponding scan line respectively 281, the data drive circuit 29 exports the second gray scale voltage Vd2 to a plurality of data lines 291, to pass through the control of activation Switch 105 is supplied to corresponding pixel electrode 103.The public voltage generating circuit 22 provides the second common electric voltage Vc2 to institute State multiple public electrodes 101.So as to drive the touch display panel 10 to perform image and show.

For liquid crystal display device, the second common electric voltage Vc2 is typically chosen relatively described ground signalling GND and is Constant constant voltage signal, it is, for example, (- 1) V.In the first period W1, the modulated signal MGND is, for example, cyclically-varying Signal, frequency is, for example, 200KHZ, amplitude 1.8V, i.e. modulated signal MGND the first reference signal is 0V, the second reference Signal is 1.8V.Correspondingly, the voltage signal and 0.8V alternating voltage signal that the first common electric voltage Vc1 is (- 1) V are defeated The signal gone out.

It should be noted that in the figure 7, only show that modulation circuit 21 exports modulated signal MGND and gives touch drive circuit 23, eliminate modulation circuit 21 and export modulated signal MGND to other circuits with earth terminal in domain 90, such as common electric voltage Generation circuit 22, generation circuit of scanning signals 28a etc., so, those skilled in the art can clearly learn institute according to the above description It is to have to export modulated signal MGND to other circuits with earth terminal in domain 90 to state modulation circuit 21.

In some embodiments, the drive circuit 20 can also not drive all public electrodes 101 to be performed both by certainly Capacitance touch senses.

Also referring to Fig. 8 and Fig. 9, Fig. 8 is that the decomposition texture of an embodiment of touch display panel 10 shown in Fig. 7 shows It is intended to.Fig. 9 is the cross-sectional view of touch display panel 10 shown in Fig. 8.The touch display panel 10 includes the first base Plate 106, second substrate 107, display medium layer 108.The display medium layer 108 is liquid crystal layer in this embodiment, so, can Change ground, in other embodiments, can correspond to other display mediums.The He of pixel electrode 103 of the multiple pixel 11 Controlling switch 105, the multi-strip scanning line 281 and a plurality of data lines 291 are arranged on the second substrate 107.Institute State display medium layer 108 and the multiple public electrode 101 be arranged on the first substrate 106 and the second substrate 107 it Between.

The first substrate 106 is, for example, transparent insulation substrate with the second substrate 107.The transparent insulation substrate example It is such as glass substrate, film substrate.

The second substrate 107 and the pixel electrode 103 being arranged on the second substrate 107, controlling switch 105, The multi-strip scanning line 281 and a plurality of data lines 291 are often collectively referred to as array (Array) substrate.Relatively, described Colored filter (not shown) is provided with one substrate 106, to realize that coloured image is shown.The first substrate 106 and coloured silk Colo(u)r filter is often collectively referred to as colored filter (Color Filter, CF) substrate.The first substrate 106 is back to described The side of two substrates 107 shows and received touch-sensing for image.So, ground is changed, the colored filter can also be put Put on the second substrate 107.In some type of display device, the colored filter can be also omitted, alternative Ground, lighted using the light source of the color of red, green, blue three.In addition, for different types of display device, the second substrate 107 can also be used for image back to the side of the first substrate 106 shows and receives touch-sensing.The touch display panel 10 or be two-sided touch display panel.The present invention be to touch display panel 10 one side touch display panel or it is two-sided touch Touch display panel and be not particularly limited.

It is preferred that the multiple public electrode 101 be arranged on the display medium layer 108 and the second substrate 107 it Between.In the present embodiment, the multiple public electrode 101 is positioned at the display medium layer 108 and the multiple pixel electrode Between 103.For example, the multiple public electrode 101 is located at same layer, the multiple pixel electrode 103 is located at same layer, the two It is stacked.Further, since the touch display unit 1 is by taking liquid crystal display device as an example, and correspondingly, the liquid crystal display dress It is set to fringe field switching type (Fringe Field Switching, FFS) liquid crystal display device.The multiple public electrode Slit 101a is respectively arranged with 101.So as to form fringe field between pixel electrode 103.In this embodiment, institute Slit can be not provided with multiple pixel electrodes 103 by stating, and be respectively whole piece electrode, so, change ground, the multiple pixel electrode Slit is may also set up on 103, so as to improve edge electric field strength.

Also referring to Figure 10 and Figure 11, Figure 10 is the section of another embodiment of touch display panel 10 shown in Fig. 7 Structural representation.Figure 11 is the schematic top plan view of touch display panel 10 shown in Figure 10.The multiple public electrode 101 can also be set Put between pixel electrode 103 and second substrate 107.Between the multiple public electrode 101 and the multiple pixel electrode 103 It is stacked.Slit 103a is set respectively on the multiple pixel electrode 103, edge electricity is formed between public electrode 101 .In this embodiment, slit can be not provided with the multiple public electrode 101, be respectively whole piece electrode, so, changed Ground, slit has been may also set up on the multiple public electrode 101, so as to improve edge electric field strength.

In addition, modifiable ground, the touch display panel 10 or plane conversion type (In-Plane Switching, IPS liquid crystal display panel), or, the touch display panel 10 or twisted nematic (Twisted Nematic, TN) Liquid crystal display panel, or, the touch display panel 10 be other any suitable types display panel.

Referring again to Fig. 1 and Fig. 3, the electronic equipment 100 further comprises main control chip 3.The main control chip 3 and institute Touch display unit 1 is stated to connect.The main control chip 3 is used to enter row data communication with the touch display unit 1.The master control Chip 3 is further used for providing supply voltage to the touch display unit 1.The main control chip 3 can be one chip, It can also be a chipset.When main control chip 3 is chipset, the chipset includes application processor (Application Processor, AP) and power supply chip.In addition, the chipset can further comprise storage chip.Further, the application Processor is alternatively central processing unit (Central Processing Unit, CPU).

The main control chip 3 includes power supply end 31 and earth terminal 33.The power supply end 31 connects drive circuit 20, for being powered for drive circuit 20.The connection of earth terminal 33 equipment, the ground signalling GND on receiving device ground.First Period W1 and the second period W2, the main control chip 3 are using ground signalling GND as voltage reference.

The main control chip 3 for example provides display data and associated control signal to the display driver circuit 20a.Institute Stating the signal that display driver circuit 20a is provided according to the main control chip 3 correspondingly drives the touch display panel 10 to perform Corresponding image is shown.It is electric to driving is touched that the main control chip 3 for example further provides for power supply voltage signal (VDD1, VDD2) Road 23 and the grade circuit of public voltage generating circuit 22.The touch drive circuit 23, which provides, touches drive signal to public electrode 101 perform touch-sensing, and the main control chip 3 receives the signal exported from signal processing circuit 26, corresponding to control electronics to set Whether standby 100 perform corresponding function.In addition, the main control chip 3 leads to for example by providing control signal to control circuit 25 Cross control circuit 25 and control the data selection circuit 24, control the drive circuit 20 to drive public electrode 101 to hold to correspond to The sequential of row touch-sensing.

It should be noted that in the first period W1, because the main control chip 3 is located in domain 80, the display driving electricity The circuits such as road 20a, touch drive circuit 23 are located in domain 90, and therefore, the main control chip 3 in domain 80 is with being located in domain 90 Display driver circuit 20a, the signal transmission touched between the circuits such as drive circuit 23 need to for example be handled via level conversion, with full The pressure-resistant demand of sufficient electronic component.Relatively, in the second period W2, main control chip 3 and display driver circuit 20a, driving is touched If between the grade circuit of circuit 23 signal transmission need to be handled via level conversion, carry out level conversion processing, if without via Level conversion processing, then handled without level conversion.

Also referring to Fig. 3, Figure 12 and Figure 13, Figure 12 is the knot of an embodiment of signal processing circuit 26 shown in Fig. 3 Structure block diagram.Described Figure 13 is the structure of an embodiment of a signal processing unit 261 of signal processing circuit 26 shown in Figure 12 Schematic diagram.The signal processing circuit 26 includes multiple signal processing units 261.Each signal processing unit 261 is corresponding to be connected One operational amplifier 231, for the sensing signal exported from the operational amplifier 231 to be handled and calculated, touched Touch information.

The signal processing unit 261 includes analog to digital signal conversion unit 263 and computing unit 265.The mould The signal that plan-data signal converting unit 263 is exported to the second output end g2 from operational amplifier 231 carries out modulus and turned Change, and export the data signal after conversion to the computing unit 265.The computing unit 265 is according to the data signal meter Calculate and obtain touch coordinate.The computing unit 265 is connected with the main control chip 3, and the signal of touch coordinate is represented for exporting To main control chip 3.The main control chip 3 corresponds to control electronics 100 according to the signal of the expression touch coordinate and performs phase The function of answering.

It should be noted that the structure of the signal processing circuit 26 is also not limited to the structure shown in Figure 12, for example, It can be that multiple operational amplifiers 231 share a signal processing unit 261, and not distinguish for each operational amplifier 231 is corresponding Connect a signal processing unit 261.

In addition, in circuit module or the clipped electricity corresponding with increasing in signal processing unit 261 of operational amplifier 231 Road module is also possible, or, use other circuit modules or circuit unit come also realize that identical function is equally can be with 's.Specifically, e.g., filter unit is further comprised between the output end g2 of analog to digital signal conversion unit 263 and second, The filter unit to the second output end g2 signals exported be filtered processing after export again filtered signal to simulation- Data signal converting unit 263.

For another example can further it be set between the computing unit 265 and the analog to digital signal conversion unit 263 Level conversion unit 264 is put, the level conversion unit 264 is used for the analog to digital signal conversion unit 263 output Data signal carries out level conversion, and the data signal after output level conversion is to computing unit 265.The computing unit 265 Calculated according to the data signal after level conversion and obtain touch coordinate.In another example the computing unit 265 and the level conversion The transposition of unit 264, correspondingly, the analog to digital signal conversion unit 263 export the data signal after conversion to institute State computing unit 265.The computing unit 265 calculates according to the data signal obtains touch coordinate, and will represent to touch to sit For target signal output to level conversion unit 264, the level conversion unit 264 represents that receiving the signal of touch coordinate enters After line level conversion, then export to the main control chip 3, so and it is possible, it is necessary to according to computing unit 265 and simulation- The pressure-resistant situation of data signal converting unit 263 determines.

Figure 14 is referred to, Figure 14 is the structural representation of the another embodiment of electronic equipment 100.The touch display surface Plate 10 can further comprise earth element, and the earth element is, for example, to be grounded L1.The ground wire L1 is for example arranged on institute State around multiple pixels 11.So, the earth element is not limited to the ground wire L1.In addition, the turntable driving electricity Road 28 can for example be integrated on the touch display panel 10 (Gate In Panel, GIP), correspondingly, the earth element It can be the earth element in scan drive circuit 28.The ground wire L1 can be also omitted in other embodiments.

The drive circuit 20 can further comprise the first earth terminal 201 and the second earth terminal 203.The modulation circuit 21 It is connected between first earth terminal 201 and second earth terminal 203.Wherein, first earth terminal 201 connects described Earth element on touch display panel 10, in the present embodiment, first earth terminal 201 connect the ground wire L1. Second earth terminal 203 with connecting equipment, receives ground signalling GND.In the first period W1, the modulation circuit 21 passes through institute State the first earth terminal 201 and export the modulated signal MGND to the touch display panel 10；In the second period W2, the modulation Circuit 21 exports the ground signalling GND to the touch display panel 10 by first earth terminal 201.

The drive circuit 20 can for example further comprise slope controller 204, the slope controller 204 and the tune Circuit 21 processed connects, the slope of the modulated signal for controlling the output of modulation circuit 21, to reduce electromagnetic interference (EMI). In addition, the slope controller 204 is for example arranged in the domain 80 on the basis of GND.So, in other embodiments, it is described oblique Rate controller 204 can be also omitted.

The drive circuit 204 can further comprise display processing circuit 205.The display processing circuit 205 is connected to Between the main control chip 3 and the level conversion unit 264.The level conversion unit 264 further with control circuit 25 Connection.The display processing circuit 205 is used to carry out the display data from main control chip 3 respective handling (e.g., storage, solution Compression, color adjustment etc.).The level conversion unit 264 be arranged on the display processing circuit 205 and control circuit 25 it Between, for carrying out level conversion to the display data after the display processing circuit 205 processing, and it is aobvious after output level conversion Registration evidence gives the control circuit 25.The control circuit 25 exports corresponding display data and clock signal to the display Drive circuit 20a.The display driver circuit 20a changes the display data received as gray scale voltage, and according to the sequential Signal exports the first gray scale voltage Vd1 in the first period W1 and performs image display refreshing to corresponding pixel electrode 103, second Period W2 exports the second gray scale voltage Vd2 and performs image display refreshing to corresponding pixel electrode 103.The display data is preferred For data signal.

It should be noted that in the second period W2, when not using the scheme on modulation ground, if display processing circuit 205 with When signal between the control circuit 25 is not required to level conversion, then between display processing circuit 205 and control circuit 25 Signal can be without level conversion, still, in the first period W1, in modulation ground technical scheme, due to the electricity in domain 80 and domain 90 Press reference data different, so level conversion need to be done.

Similarly, in the second period W2, if the signal between computing unit 265 and analog to digital signal conversion unit 263 , then can be without electricity to the signal between computing unit 265 and analog to digital signal conversion unit 263 when being not required to level conversion Flat turn is changed, still, in the first period W1, in modulation ground technical scheme, because domain 80 is different from the voltage reference in domain 90, So level conversion need to be done.

Accordingly, for example switching device can be switched by setting in level conversion unit 264, to control respectively at first Whether section W1 does level conversion with the second period W2 to the corresponding signal of reply.So, the switch switching device or other suitable Circuit structure may also be arranged on outside level conversion unit 264.

In the present embodiment, to each circuit module or circuit unit in drive circuit 20 in the division in two domains 80,90 Situation is：By display driver circuit 20a, touch drive circuit 23, signal processing circuit 26 a part (operational amplifier 231, Analog to digital signal conversion unit 263), data selection circuit 24 and control circuit 25 be divided in domain on the basis of MGND In 90, in addition, touch display panel 10 is also divided in domain 90；By modulation circuit 21, display processing circuit 205, computing unit 265th, voltage generation circuit 27, slope controller 204 are divided in the domain 80 on the basis of GND；Level conversion unit 264 is horizontal Across two domains, i.e. a part is in domain 80, and a part is in domain 90, and for those of ordinary skill in the art, it is according to this Shen Record and circuit theory please is can to determine level conversion unit 264 respectively positioned at the part in domain 80 and domain 90, right herein This is repeated no more.

Ground is changed, the present invention is alternatively other suitable to dividing mode of the drive circuit 20 in above-mentioned two domain 80,90 Situation, it is not limited to the division described in above-mentioned embodiment.

It should be further stated that the signal meeting modulated signals MGND modulation in domain 90 is output to from domain 80, accordingly, The signal that domain 80 is output to from domain 90 also can be modulated accordingly, e.g., modulation opposite with modulated signal MGND etc..

Because signal modulated signals MGND Integral synchronous of the touch display panel 10 when performing touch-sensing is modulated, its In, drive circuit 20 is supplied to public electrode 101 to perform the display drive signals that image is shown, i.e. common electric voltage, e.g., second After common electric voltage Vc2, modulated signal MGND modulation, driving public electrode 101 can be applied to simultaneously and perform touch-sensing, from And while ensureing that touch display panel 10 performs normal picture display, it can further drive public electrode 101 to perform touch Sensing, in addition, the signal to noise ratio of touch display unit 1 can also be improved, and then improve touch-sensing precision.

Please continue to refer to Figure 14, in the present embodiment, in the first period W1, due to a part for the drive circuit 20 It is in the domain 80 on the basis of GND, a part is in the domain 90 on the basis of MGND, accordingly, it is possible to have in domain 90 Current flowing backwards are to the possibility in domain 80, and in order to prevent this phenomenon, the electronic equipment 100 can further comprise protection circuit 15, The protection circuit 15 is arranged between domain 80 and domain 90.

Specifically, the drive circuit 20 further comprises the first power end 206 and second source end 207.Wherein, it is described First power end 206 is located in domain 90.The second source end 207 is connected with the power supply end 31 of the main control chip 3.Institute Main control chip 3 is stated by the output supply voltage of power supply end 31 to the second source end 207.The protection circuit 15 It is connected between the second source end 207 and first power end 206.

When the modulated signal MGND is drive signal (that is, the second reference signal), the protection circuit 15 is corresponding disconnected Open the connection between first power end 206 and the second source end 207；When the modulated signal MGND is ground signalling During GND (that is, the first reference signal), the protection circuit 15 is corresponding to close first power end 206 and the second source Connection between end 207.

Figure 15 is referred to, Figure 15 is the electrical block diagram of an embodiment of protection circuit 15.In present embodiment In, the protection circuit 15 includes diode J1.The anode connection second source end 207 of the diode J1, the diode J1 negative electrode connects the first power end 206.

Alternatively, the protection circuit 15 further comprises the first electric capacity Q1 and the second electric capacity Q2.Wherein, first electricity Hold Q1 be connected to the anode of the diode J1 and be loaded with ground signalling GND equipment ground between, the second electric capacity Q2 connects Be connected to the negative electrode of the diode J1 and be loaded with modulated signal MGND modulation ground between.Wherein, the first electric capacity Q1 with Diode J1 is arranged in domain 80, and the second electric capacity Q2 is arranged in domain 90.

The protection circuit 15 is not limited described in embodiment of above, e.g., refers to Figure 16, Figure 16 is protection circuit 15 Another embodiment electrical block diagram.For the protection circuit 15 shown in clear difference Figure 15, the guarantor shown in Figure 16 Protection circuit is denoted as 15a.The protection electric capacity 15a includes the 3rd active switch 151 and control unit 153.Described 3rd has Source switch 151 includes control terminal K3, the first transmission end T5 and the second transmission end T6.The control terminal of 3rd active switch 151 K3 connections described control unit 153, the first transmission end T5 connections second source end 207, the second transmission end T6 Connect first power end 206.When the modulated signal MGND is drive signal, described control unit 153 controls described 3rd active switch 151 ends, and the protection circuit 15a correspondingly disconnects first power end 206 and the second source end Connection between 207；When the modulated signal MGND is ground signalling GND, described control unit 153, which controls, the described 3rd to be had Source switch 151 is turned on, and the protection circuit 15a is correspondingly closed between first power end 206 and the second source end 207 Connection.3rd active switch 151 is as being thin film transistor (TFT), triode, metal oxide semiconductor field effect tube.

Further optionally, the protection circuit 15a further comprises the first electric capacity Q1 and the second electric capacity Q2.Wherein, first Electric capacity Q1 is connected between the first transmission end T5 and the equipment ground for being loaded with ground signalling GND, and the second electric capacity Q2 is connected to Between second transmission end T6 and the modulation ground for being loaded with modulated signal MGND.

Ground is changed, in other embodiments, the modulation circuit 21 also can be by the power supply in drive circuit 20 Power supply or reference power source are modulated, and all signals to reach to touch display panel 10 carry out Integral synchronous modulation, and simultaneously It is unrestricted to equipment to be modulated.For example, the modulated terminal M of the modulation circuit 21 is except that can connect or be connect as foregoing first Outside ground terminal 201 (when modulating ground), it can also connect or as foregoing first power end 206 (when modulating power supply).When Connection or during as first power end 206, the modulation circuit 21 is connected to the first power end 206 and second source end Between 207.First power end 206 is for the first earth terminal 201, also referred to as power supply end, and the two is loaded Voltages keep constant.

In addition, in addition to first power end 206 and first earth terminal 201, drive circuit 20 generally includes Reference power source end (not shown), when the first power end 206 is used to load the first supply voltage, the first earth terminal 201 for loading During second source voltage, the reference power source end is used to loading the 3rd supply voltage, the height of the 3rd supply voltage between Between the height of first supply voltage and second source voltage, wherein, first supply voltage and second source voltage Pressure difference keep constant, the pressure difference holding of first supply voltage and the 3rd supply voltage is constant.The reference power source end It can be used as or connect the modulated terminal.That is, one of described power supply end, reference power source end and the first earth terminal three person It is used as or connects the modulated terminal, accordingly, the supply voltage for being used as or connecting the modulated terminal includes modulated signal.

Correspondingly, in the second period W2, the modulated terminal M loads a constant voltage, and the drive circuit 20 provides second Gray scale voltage Vd2, to public electrode 101, drives the touch display surface to pixel electrode 103, the second common electric voltage Vc2 of offer Plate 10 performs image and shown；In the first period W1, the modulated terminal M load-modulate signals, drive circuit 20 provides the first GTG Voltage Vd1, to public electrode 101, drives the touch display panel 10 to pixel electrode 103, the first common electric voltage Vc1 of offer While performing image display, further public electrode 101 is driven to perform self-capacitance touch-sensing.

In addition, it can also be decreased or increased in the touch display unit 1 and electronic equipment 100 of foregoing each embodiment some Element or combinational circuit etc., for those of ordinary skill in the art, as long as pass through common knowledge, prior art, simultaneously The protection domain of the application all should be fallen into reference to the technical scheme that the technology contents of the application can be derived rationally.

Ground is changed, in other embodiments, public electrode 101 is for example for example made as emission electrode, scan line 281 For receiving electrode, mutual capacitance is formed between public electrode 101 and scan line 281, the drive circuit 20 can also drive touch aobvious Show that panel 10 performs mutual capacitance touch sensing.

In other embodiments, for the touch display unit 1 and electronic equipment 100 of foregoing each embodiment, institute State drive circuit 20 and remove and can be touched using by modulating ground or modulation power supply or modulation reference power source come Integral synchronous modulation All signals of display panel 10, shown and the mode of touch-sensing to reach while drive touch display panel 10 to perform image Outside, alternately, when touch display unit 1 performs image simultaneously show with touch-sensing, can also use it is non-modulation or The non-modulation techniques scheme of non-modulation power supply or non-modulated reference power supply etc. is driven, i.e. electronic equipment 100 is working A domains 80 of the Shi Caiyong using ground signalling GND as voltage basis of reference.

Although embodiment has been described on specific configuration and the sequence of operation here, it should be appreciated that, replace The embodiment in generation can increase, omit or change element, operation etc..Therefore, embodiment disclosed herein is meant to be real Apply example rather than limitation.

Claims

1. a kind of touch display unit, including：

Touch display panel, including multiple public electrodes, the multiple public electrode are used as show electrode and touch-sensing electrode； And drive circuit, shown for driving touch display panel to perform image, be additionally operable to drive public electrode to perform touch-sensing；When The drive circuit driving touch display panel performs image display refreshing with touch-sensing simultaneously when, the touch display panel On signal be signal after modulated signal modulation, wherein, the drive circuit is used for that to provide identical first public Voltage gives the multiple public electrode, and while driving the multiple public electrode execution image display, and further driving is public Common electrode performs touch-sensing, and first common electric voltage is the signal after modulated signal modulation.

2. touch display unit according to claim 1, it is characterised in that：The drive circuit is the multiple for driving Public electrode performs self-capacitance touch-sensing.

3. touch display unit according to claim 1, it is characterised in that：The multiple public electrode is arranged in two-dimensional array Cloth.

4. touch display unit according to claim 1, it is characterised in that：The drive circuit is used to produce the modulation Signal, and by using all signals of touch display panel described in the modulated signal synchronous modulation, to drive the touch While display panel performs image display refreshing, further public electrode is driven to perform touch-sensing.

5. touch display unit according to claim 1, it is characterised in that：When described touch of drive circuit driving shows When showing panel while performing image display refreshing and touch-sensing, all signals of the touch display panel are with the modulation The rise of signal and raise, reduced with the reduction of the modulated signal.

6. touch display unit according to claim 1, it is characterised in that：The drive circuit provides identical simultaneously One common electric voltage performs image to the multiple public electrode and shown, and timesharing is received from the output of the multiple public electrode Touch-sensing signal, to obtain touch information.

7. touch display unit according to claim 1, it is characterised in that：The relatively described modulation of first common electric voltage Signal keeps constant.

8. according to the touch display unit described in any one in claim 1-7, it is characterised in that：The touch display panel Further comprise multiple pixel electrodes, the drive circuit is by providing the first gray scale voltage to pixel electrode, the public affairs of offer first Common voltage while refreshing to drive touch display panel to perform image display, further drives public electrode to public electrode Touch-sensing is performed, first gray scale voltage and first common electric voltage are after the modulated signal synchronous modulation Signal.

9. touch display unit according to claim 8, it is characterised in that：The multiple pixel electrode is located at same layer, The multiple public electrode is located at same layer, is stacked between the multiple pixel electrode and the multiple public electrode, institute State and be used to form fringe field between multiple public electrodes and the multiple pixel electrode this two classes electrode.

10. touch display unit according to claim 9, it is characterised in that：When the drive circuit drives the touch Display panel performs image display and refreshed and during touch-sensing simultaneously, along the multiple pixel electrode and the multiple common electrical Stacked direction between pole, the drive circuit drive the pixel electrode for performing image display refreshing to be held with driving in synchronization It is non-overlapped between the public electrode of row touch-sensing.

11. touch display unit according to claim 9, it is characterised in that：The touch display unit further comprises First substrate, second substrate and display medium layer；The multiple pixel electrode is positioned at the display medium layer and second base Between plate；The multiple public electrode is located between the display medium layer and the multiple pixel electrode, wherein, it is the multiple Slit is set on public electrode, or, the multiple public electrode is between the multiple pixel electrode and institute's second substrate, its In, slit is set on the multiple pixel electrode.

12. touch display unit according to claim 8, it is characterised in that：The touch display panel further comprises： Multi-strip scanning line；

Multiple transistor switches, each transistor switch include coordination electrode, the first transmission electrode and the second transmission electrode, its In, coordination electrode connection scan line, the first transmission electrode connection data wire, the second transmission electrode connection pixel electrode；

The drive circuit activates the transistor being connected with scan line and opened by providing the first scanning open signal to scan line Close, and it is public to pixel electrode, and offer first by data wire and the transistor switch of activation the first gray scale voltage of offer Voltage refreshes and self-capacitance touch-sensing to public electrode to drive touch display panel while perform image display；

Wherein, the first scanning open signal, the first gray scale voltage, the first common electric voltage are to be modulated through the modulated signal Signal afterwards.

13. touch display unit according to claim 12, it is characterised in that：The drive circuit produces including common electric voltage Raw circuit and touch drive circuit；The public voltage generating circuit is connected with the multiple public electrode alternative, is used for First common electric voltage is provided to show to public electrode execution image；The touch drive circuit and the multiple public electrode Alternative connection, for providing, first common electric voltage performs touch-sensing to public electrode and image is shown.

14. touch display unit according to claim 13, it is characterised in that：The drive circuit further comprises data Selection circuit, the public voltage generating circuit and it is described touch drive circuit by the data selection circuit with it is the multiple The alternative connection of public electrode.

15. touch display unit according to claim 14, it is characterised in that：When the touch drive circuit drive part Public electrode performs image simultaneously when showing with touch-sensing, and the public voltage generating circuit drives remaining all or part of public Common electrode performs image and shown.

16. touch display unit according to claim 14, it is characterised in that：The drive circuit is driving the touch During display panel shows a two field picture, by the data selection circuit, the touch drive circuit timesharing provides the One common electric voltage gives the multiple public electrode to perform simultaneously, and image is shown and touch-sensing, the public voltage generating circuit divide When provide the first common electric voltage to the multiple public electrode perform image show.

17. touch display unit according to claim 15, it is characterised in that：Described in the intermittent driving of the drive circuit Multiple public electrodes perform self-capacitance touch-sensing, and the period that definition has public electrode execution touch-sensing was the first period, Define the multiple public electrode and be performed both by that image is shown and the period of non-executing touch-sensing was the second period.

18. touch display unit according to claim 17, it is characterised in that：In the first period, the drive circuit production Raw modulated signal, and using all signals of touch display panel described in the modulated signal synchronous modulation, to drive described touch Touch display panel while perform image and show and self-capacitance touch-sensing；In the second period, the drive circuit is used to provide the Two scanning open signals activate the transistor switch being connected with scan line, pass through data wire and the crystal of activation to scan line Pipe switch provides the second gray scale voltage to pixel electrode, and for providing the second common electric voltage to public electrode, it is tactile to drive Display panel execution image is touched to show and non-concurrent execution touch-sensing, wherein, first common electric voltage is described second public Signal of the common voltage after modulated signal modulation, the first scanning open signal are the described second scanning open signal warp Signal after the modulated signal modulation.

19. touch display unit according to claim 18, it is characterised in that：The drive circuit includes the first ground connection End, modulation circuit and the second earth terminal, first earth terminal are connected by the modulation circuit with second earth terminal, Wherein, second earth terminal is used to load ground signalling, and the modulation circuit is used to be driven according to the ground signalling and one Signal produces the modulated signal, and in the first period, the modulation circuit exports the modulated signal to first earth terminal, The signal that the drive circuit is exported to touch display panel is using the modulated signal on the first earth terminal as voltage reference Benchmark, in the second period, the modulation circuit exports the ground signalling to first earth terminal, the drive circuit output Signal on to touch display panel is using the ground signalling on the first earth terminal as voltage basis of reference.

20. the touch display unit in a kind of electronic equipment, including claim 1-19 described in any one.