CN209044542U

CN209044542U - Touch display unit and electronic equipment

Info

Publication number: CN209044542U
Application number: CN201690000406.2U
Authority: CN
Inventors: 林峰
Original assignee: Shenzhen Deep Minimally Invasive Core Technology Co Ltd
Current assignee: Huizhou Xili Technology Co ltd
Priority date: 2016-09-30
Filing date: 2016-09-30
Publication date: 2019-06-28
Anticipated expiration: 2026-09-30
Also published as: WO2018058651A1

Abstract

The utility model provides a kind of touch display unit and electronic equipment.Touch display unit includes touch display panel and driving circuit.Touch display panel includes multiple pixel electrodes；Multi-strip scanning line；Multiple data lines；Multiple control switches；With multiple public electrodes.Driving circuit is by providing the first scanning open signal to scan line, activate the control switch being connected with scan line, and the first gray scale voltage is provided to pixel electrode by data line, identical first common voltage is provided to the multiple public electrode, while refreshing to drive touch display panel to execute image display, further public electrode is driven to execute touch-sensing.Wherein, the first scanning open signal, the first gray scale voltage, the first common voltage are the signal after a modulated signal synchronous modulation.The electronic equipment includes the touch display unit.

Description

Touch display unit and electronic equipment

Technical field

The utility model relates to touch field of display technology more particularly to a kind of touch display unit and have the touching Touch the electronic equipment of display device.

Background technique

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

It is illustrated so that touch display unit is liquid crystal display device as an example, in general, liquid crystal display device includes liquid crystal Show panel and is shown and the driving circuit of touch-sensing for driving the liquid crystal display panel to execute image.The liquid crystal display Panel includes multi-strip scanning line, multiple 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 connects scan line, and the source electrode connects data line, the drain electrode Connect pixel electrode.The transistor that the driving circuit is connected to scan line, activation with scan line for providing scanning signal, And gray scale voltage is provided to pixel electrode by the transistor of data line and activation, and provides common voltage to public electrode, Refresh to drive liquid crystal display panel to execute image display.

When the driving 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 known as going to the time slot before another scan line providing the scanning signal Gap.In other words, the driving circuit is providing gray scale voltage to another after providing gray scale voltage to one-row pixels electrode Time slot before one-row pixels electrode is gap in the ranks.In addition, the driving 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, that is, no image display refreshes, correspondingly, at this point, the liquid LCD panel is entirely in the state that image display is kept.

Existing liquid crystal display device generally executes touch-sensing to touch-sensing electrode using gap is expert at.Generally, In order to cooperate execution touch-sensing, guarantee the duration of touch-sensing, in the ranks the time of gap is generally extended.The touch-sensing electricity Pole is, for example, to be multiplexed public electrode.When public electrode multiplexing is as touch-sensing electrode, the driving circuit usually provides and The different touch driving signal of common voltage executes touch-sensing to public electrode.In general, common voltage is relative to ground signalling GND (for example, 0 volt) is a constant voltage signal, and the touch driving 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.It can be seen that the liquid crystal Display device is that timesharing executes image display refreshing and touch-sensing, is felt to reduce image to a certain extent and show and touch Influencing each other between survey.

So, being gradually increased 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, even higher resolution ratio, and display refreshing frequency generally 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 execute touch-sensing then can because the time it is obvious not enough due to cause touch-sensing that cannot sufficiently carry out the problem of.When refreshing frequency mentions When up to 120HZ, it can be used for the time of touch-sensing with regard to less.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model needs A kind of touch display unit and electronic equipment are provided.

The utility model provides a kind of touch display unit, comprising:

Touch display panel, including

Multiple pixel electrodes；

Multi-strip scanning line；

Multiple data lines；

Multiple control switches, each control switch include coordination electrode, the first transmission electrode and the second transmission electrode, In, the coordination electrode is connect with the scan line, and first transmission electrode is connect with the data line, second transmission Electrode is connect with the pixel electrode；With

Multiple public electrodes；With

Driving circuit activates the control being connected with scan line to open by providing the first scanning open signal to scan line It closes, and provides the first gray scale voltage to pixel electrode by data line and the control switch of activation, and provide identical first Common voltage gives the multiple public electrode, and driving the touch display panel to be performed simultaneously, image display refreshes and touch is felt It surveys；

Wherein, the first scanning open signal, the first gray scale voltage, the first common voltage are same through a modulated signal Modulated signal is walked, the driving circuit drives institute by providing first common voltage to the multiple public electrode While stating multiple public electrodes execution image displays, further public electrode is driven to execute touch-sensing.

Optionally, the relatively described modulated signal of first common voltage remains unchanged.

Optionally, when the driving circuit provides the first scanning open signal to scan line, drive part is public Common electrode executes touch-sensing.

Optionally, the driving circuit is for driving the multiple public electrode to execute self-capacitance touch-sensing.

Optionally, when the driving circuit drives the touch display panel to be performed simultaneously, image display refreshes and touch is felt When survey, the signal on the touch display panel is the signal after the modulated signal synchronous modulation.

Optionally, the driving circuit includes modulation circuit and the first ground terminal, and the modulation circuit is described for generating Modulated signal, when the modulation circuit exports the modulated signal to first ground terminal, on the touch display panel Signal be signal after the modulated signal synchronous modulation.

Optionally, the driving circuit export modulated signal to the first ground terminal by controlling the modulation circuit, It is driven using all signals of touch display panel described in the modulated signal synchronous modulation, and using first common voltage Public electrode executes self-capacitance touch-sensing, and to drive the touch display panel to be performed simultaneously, image display refreshes and touch is felt It surveys.

Optionally, the driving circuit provides identical first common voltage to the multiple public electrode simultaneously, and point When receive the touch-sensing signal that exports from the multiple public electrode, to obtain touch information, wherein the driving circuit The first common voltage that driving public electrode executes touch-sensing is used as display drive signals simultaneously and touches driving signal.

Optionally, the driving circuit includes touching driving circuit, public voltage generating circuit and data selection circuit； The touch driving circuit is connect by the data selection circuit with the multiple public electrode alternative, the common electrical Pressure generation circuit is connect by the data selection circuit with the multiple public electrode alternative；Wherein, the common electrical Pressure generation circuit shows that the touch driving circuit is described more for driving for driving the multiple public electrode to execute image A public electrode executes image and shows and self-capacitance touch-sensing.

Optionally, when the driving circuit drives the touch display panel to be performed simultaneously image display refreshing and self-capacitance When touch-sensing, first common voltage that the multiple public electrode receives generates electricity respectively from the common voltage Road and the touch driving circuit.

Optionally, the public voltage generating circuit includes:

Signal source, including ground terminal and output end, the ground terminal are connect with first ground terminal；

First amplifier, including third power end, third ground terminal, the first in-phase end, the first reverse side and the first output End, wherein the third power end is used for loading power voltage, and the third ground terminal is connect with first ground terminal, institute The output end that the first in-phase end connects the signal source is stated, first reverse side is connect with first output end, and described One output end is used to connect by data selection circuit with public electrode alternative；With

Electric capacity of voltage regulation, including opposite the first pole plate and the second pole plate, wherein the first pole plate is connected to data selection circuit Between the first output end, the second pole plate is connected to first ground terminal.

Optionally, the touch driving circuit includes:

The signal source；With

Multiple operational amplifiers, each operational amplifier include the second amplifier and feedback branch；Every one second amplifier Including the 4th power end, the 4th ground terminal, the second in-phase end, the second reverse side and second output terminal, wherein the 4th electricity Source is used for loading power voltage, and the 4th ground terminal is connect with first ground terminal, and second in-phase end connects institute The output end of signal source is stated, second reverse side is connect by feedback branch with the second output terminal, second reverse phase End is further connect by data selection circuit with public electrode alternative.

Optionally, the driving circuit further comprises signal processing circuit, and the second output terminal further connects institute Signal processing circuit is stated, the signal processing circuit is used to receive the touch-sensing signal from driving circuit output is touched, with Obtain touch information.

Optionally, the multiple pixel electrode and the multiple public electrode are in two-dimensional array arrangement, when the driving When touch display panel described in circuit drives is performed simultaneously image display refreshing with self-capacitance touch-sensing, in synchronization, hold Multirow is spaced between the pixel electrode of the public electrode institute face of row touch-sensing and the pixel electrode for executing image display refreshing The pixel electrode of hold mode is shown in image.

Optionally, the driving circuit is further used for by providing the second scanning open signal to scan line, activation with The control switch that scan line is connected, and provide the second gray scale voltage by data line and the control switch of activation and give pixel electricity Pole, and provide the second common voltage to public electrode is refreshed and non-concurrent to drive touch display panel to execute image display Execute touch-sensing.

Optionally, the second scanning open signal is the first scanning open signal after modulated signal modulation Signal, first common voltage be second common voltage through the modulated signal of the modulated signal.

Optionally, defining the period for executing touch-sensing there are public electrode was the first period, was defined the multiple public Electrode be performed both by image show rather than be performed simultaneously touch-sensing period be the second period, first period and described second Period is alternately；It is on first ground terminal that the driving circuit, which is exported to the signal on the touch display panel, Signal be voltage basis of reference；In the first period, the modulation circuit exports the modulated signal to the first ground terminal；? Two periods, the modulation circuit export ground signalling to the first ground terminal.

Optionally, when the driving circuit drives the touch display panel to be performed simultaneously, image display refreshes and touch is felt When survey, the output end of the signal source exports with first common voltage identical first reference voltage signal to the first same phase End and the second in-phase end.

The utility model also provides a kind of electronic equipment, the electronic equipment include it is any one of above-mentioned described in touch Display device.

Since the driving circuit can drive the touch display panel to be performed simultaneously image display refreshing and touch-sensing, Therefore, the time of the touch display unit execution touch-sensing is relatively elongated.Correspondingly, with the touch display unit The better user experience of electronic equipment.

Detailed description of the invention

Fig. 1 is the structure schematic diagram of the utility model electronic equipment.

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 existing signal source for touching driving circuit.

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

Fig. 7 is the electrical block diagram of a specific 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 schematic diagram of the section structure of touch display panel shown in Fig. 8.

Figure 10 is the schematic diagram of the section structure 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 structural block diagram of an embodiment of signal processing circuit shown in Fig. 3.

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

Figure 14 is the structural schematic diagram of the another embodiment of the utility model electronic equipment.

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

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

Specific embodiment

It is understandable to enable the above objects, features, and advantages of the utility model to become apparent, with reference to the accompanying drawing to this The specific embodiment of utility model is described in detail.However, example embodiment can be implemented in a variety of forms, and should not be by It is considered limited to embodiment set forth herein；On the contrary, these embodiments are provided so that the utility model will be full and complete, And the design of example embodiment is comprehensively communicated to those skilled in the art.It is for convenience or clear, it may exaggerate, save Slightly or it is schematically illustrated in every layer shown in the drawings of thickness and size and the quantity for schematically illustrating related elements.Separately Outside, the size of element not exclusively reflects that the quantity of actual size and related elements not exclusively reflects actual quantity.Because of attached drawing The reasons such as of different sizes, in different drawings shown in same or similar or related elements quantity there are not consistent feelings Condition.Identical appended drawing reference indicates same or similar structure in figure.So, it should be noted that in order to enable label has Regularity and logicality etc., in certain different embodiments, same or similar element or structure use different attached drawings Label illustrates that those skilled in the art is can directly or indirectly to judge to learn according to the relevance of technology and related text.

In addition, described feature, structure can be incorporated in any suitable manner in one or more embodiments. In the following description, many details are provided to provide and fully understand to the embodiments of the present invention.However, One of ordinary skill in the art would recognize that without one or more in the specific detail, or using other structures, constituent element Deng the technical solution of the utility model can also be practiced.In other cases, it is not shown in detail or describes known features or behaviour Make to avoid fuzzy the utility model.

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 be suitable for technology, method, physical component and system (no matter mesh It is preceding whether to know), including read those skilled in the art after the application and be inferred to or its educible extension.

In the description of the present invention, it is to be understood that " multiple " includes two and two or more, " a plurality of " includes Two and two or more, " more " include two and two or more, and " multirow " includes two rows and two rows or more, and " multiple row " includes two More than column and two column, unless the application separately has clearly specific restriction.In addition, occur in each element title and signal name The words such as " first ", " second ", " third ", " the 4th " are not the sequencing for limiting element or signal appearance, but are side Just element is named, and clearly distinguishes each element, so that description is more succinct understandable.Obscure in order to avoid understanding, needs further in advance What is illustrated has:

For display device, display device includes display panel and driving circuit.The driving circuit is for driving The display panel executes image and shows.The display panel generally includes multiple pixels, and each pixel includes the first electricity Pole and second electrode, when 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 being integrated that is connected to each other, and is a flood electrode, institute The second electrode for stating multiple pixels is structure separate.The driving circuit passes through the first electricity to each pixel Pole provides identical voltage (for example, 0 volt), different voltage is provided to the second electrode of each pixel, to can realize The image of different grayscale 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 driving circuit is driven to first electrode, offer gray scale voltage to second electrode by providing common voltage Liquid crystal display panel executes image and shows.Ground is changed, the display device can also be the display device of other suitable types, example Such as display device of electronic paper.

For each pixel, 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 driving circuit provide gray scale voltage to second electrode, provide common voltage to the When one electrode, the pixel, which starts to execute image display, to be refreshed, and after the gray scale voltage is written to second electrode, is stopped Gray scale voltage is provided to the second electrode, image display, which refreshes, to be completed.Later, 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 carrying out being pre-charged or putting in advance to second electrode Electricity provides the gray scale voltage for realizing predetermined grey menu to the second electricity again after the second electrode of same a line reaches same voltage Pole.

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

Generally, the multiple pixel is for example arranged in determinant.The driving circuit is usually line by line or by row driving Pixel executes image display and refreshes.

It is noted that image display, which refreshes, shows both different display states of holding from image, it is to be best understood from down Each embodiment of the utility model described in face is prepared.In addition, more clear " image display refreshes " and " image display is kept " It is two different technological concepts.

It should be noted that the specific call of first electrode, second electrode in different types of display device is not Together, for being applicable in the display device of each suitable type of the application, unitedly calling first electrode is public electrode, unitedly calls the second electricity Extremely pixel electrode.Correspondingly, the display voltage signal that the driving circuit is supplied to first electrode is common voltage, is supplied to 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 (for example) driving area and sensing area, such as driving line And sense wire.In an example case, driving 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 can be motivated with AC signal (AC) waveform, and mutually electricity Appearance can be formed between the row and column of the touch pixel.When an object is close to the touch pixel, it is coupled in the touch pixel Some charges between row and column can be changed to be coupled on the object.This reduction for the charge being coupled in the touch pixel can be led Cause the only reduces of the mutual capacitance between row and column and the reduction for the AC waveform being coupled in the touch pixel.Charged Couple AC wave This reduction of shape can be detected and be measured by touch system to determine 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 lead to 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 be measured by touch system to determine position of the object when touching the touch screen.

In the following, each embodiment to the utility model is illustrated.

It is the structure schematic diagram of the utility model electronic equipment also referring to Fig. 1 and Fig. 2, Fig. 1.Fig. 2 is shown in Fig. 1 The waveform diagram of one embodiment of the part signal of electronic equipment.The electronic equipment 100 for example portable electronic product, The product of the various suitable types such as smart home electronic product and vehicle electronics product, the utility model to this with no restriction. The portable electronic product is, for example, mobile phone, tablet computer, laptop, wearable device etc..The smart home electricity Sub- product is, 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 shows and touches for realizing image Sensing.The touch display unit 1 is the touch display unit of In-Cell (box inner mold or embedded) type.Described touch shows Display device in showing device 1 is, for example, liquid crystal display device.Correspondingly, the touch display unit 1 is that touch LCD is shown Device.It is mainly illustrated by taking touch liquid crystal display device as an example below.So, with changing, in the touch display unit 1 Display device can also be the display device of other suitable types, e.g., display device of electronic paper (EPD) etc..

The touch display unit 1 includes touch display panel 10 and driving 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 driving circuit 20 and the multiple public electrode 101 be separately connected, show for driving the multiple public electrode 101 to execute image, also use Touch-sensing is executed in the multiple public electrode 101 of driving.Preferably, the driving circuit 20 is for driving the multiple public affairs Common electrode 101 executes self-capacitance touch-sensing.So, the utility model is not limited thereto, and the driving circuit 20 can also be used in The multiple public electrode 101 is driven to execute the touch-sensing of other suitable types, for example, mutual capacitance touch senses, as long as The other changes or extension done based on techniques disclosed in this application thought should all fall into the protection scope 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 the side X It arranges 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 can also arrange in Else Rule or non-regular, the utility model To this and with no restrictions.

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

In particular, the driving circuit 20, can be into while driving touch display panel 10 to execute image display to refresh One step drives public electrode 101 to execute self-capacitance touch-sensing.To which the touch-sensing of touch display unit 1 is not limited in In the ranks gap I, frame gap carry out.

When the driving circuit 20 driving touch display panel 10, which is performed simultaneously image, to be shown with touch-sensing, the touching Touching all electric signals on display panel 10 is through a modulated signal of modulated signal MGND.The touch display panel Each electric signal on 10 is for example increased with the raising of the modulated signal MGND, with the reduction of the modulated signal MGND It reduces.

The driving circuit 20 is for example by utilizing touch display panel 10 described in the modulated signal MGND synchronous modulation All signals, further to drive the multiple public while driving the touch display panel 10 to execute image display Electrode 101 executes self-capacitance touch-sensing.

When the driving circuit 20 driving touch display panel 10, which is performed simultaneously image, to be shown with touch-sensing, the touching It touches the element on display panel 10 or is directly driven by the driving circuit 20, or by the driving indirectly of driving circuit 20.With For an element on touch display panel 10, when the element is directly driven by the driving circuit 20, on the element Signal be come driving circuit 20 output the modulated signal of modulated signal MGND；When the element is not driven circuit 20 when directly driving, then is for example driven indirectly by capacitive coupling driven circuit 20, capacitive coupling is present in driven circuit Between the element that 20 elements directly driven and driven circuit 20 drive indirectly, correspondingly, the signal of the element is because of capacitor Coupling is superimposed the modulated signal MGND.To which all electric signals on the touch display panel 10 are through the modulation The modulated signal of signal MGND.In addition to capacitive coupling, the element in the touch display panel 10 for example can also pass through resistance The equal driving indirectly of elements driven circuit 20.

So, ground is changed, in other embodiments, all electric signals on the touch display panel 10 can also be Carry out the modulated signal of the output of driving circuit 20.

The driving circuit 20 for example provides identical first common voltage Vc1 and executes to the multiple public electrode 101 While image is shown, public electrode 101 can further be driven to execute self-capacitance touch-sensing.The first common voltage Vc1 For through the modulated signal of modulated signal MGND.For example, the first common voltage Vc1 and modulated signal MGND Between pressure difference remain unchanged.The relatively described modulated signal MGND of first common voltage Vc1 is remained unchanged.So, it changes Ground, the first common voltage Vc1 can also be the signal of the opposite variation of pressure difference between the modulated signal Vc1.Preferably, Relative to ground signal GND is the signal changed to the first common voltage Vc1.The ground signalling GND is, for example, 0V (volt) Constant voltage signal, but it is not limited to the constant voltage signal of 0V, it can also be the constant voltage signal close to 0V, the ground connection Signal GND is usually the voltage signal of the equipment ground of electronic equipment 100.It is also known as to the equipment systematically, for example, electronics The cathode of the power supply of equipment 100, power supply for example battery.The ground signalling GND is also known as system ground voltage, systematically Signal, equipment ground voltage or equipment earth signal etc..In general, the equipment not earth ground or absolutely greatly.So, work as electricity It may also be the equipment earth ground when sub- equipment 100 is connect by conductor with earth ground.

By taking a public electrode 101 as an example, shown when driving circuit 20 drives the public electrode 101 to be performed simultaneously image When with touch-sensing, it is supplied to the first common voltage Vc1 of the public electrode 101 while is used as display drive signals and touching Driving signal；When driving circuit 20, which drives the public electrode 101 to execute image, to be shown rather than be performed simultaneously touch-sensing, mention The first common voltage 101 for supplying the public electrode 101 is non-concurrent as touch driving signal as display drive signals.

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

Correspondingly, it when the driving circuit 20 drives the multiple public electrode 101 to be performed simultaneously touch-sensing, provides All it is used as simultaneously to the first common voltage Vc1 of the multiple public electrode 101 and touches driving signal；When the driving circuit When 20 the multiple 101 timesharing of public electrode of driving execute touch-sensing, be supplied to the multiple public electrode 101 first is public Common voltage Vc1 is not while to be used as touch driving signal.Therefore, it can also claim driving circuit 20 that public electrode 101 is driven to hold First common voltage Vc1 of row touch-sensing is to touch driving signal.

When 20 timesharing of driving circuit drives the multiple public electrode 101 to execute touch-sensing, although the drive Dynamic circuit 20 provides identical first common voltage Vc1 to the multiple public electrode 101, but drives in the driving circuit 20 Dynamic public electrode 101 is performed simultaneously image and show that executing image with the circuit structure of touch-sensing and driving public electrode 101 shows The circuit structure for showing rather than being performed simultaneously touch-sensing is different.

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

It in order to better understand, can be referring now to Fig. 7, between the public electrode 101 and pixel electrode 103 of pixel 11 Display pressure difference for, the signal on public electrode 101 and pixel electrode 103 is when by the modulated signal MGND synchronous modulation Afterwards, display pressure difference will not change, and image is normally shown, and the first common voltage Vc1 for being supplied to public electrode 101 is through institute The modulated signal of modulated signal MGND is stated, the first common voltage Vc1 is the signal changed relative to ground signalling GND, To public electrode 101 be driven to execute self-capacitance simultaneously during ensuring the normally display image of touch display panel 10 Touch-sensing.

For executing the pixel 11 that image display refreshes and the pixel 11 that execution image display is kept, figure is executed The signal on pixel electrode 103 as showing the pixel 11 refreshed is to carry out modulated letter provided by driving circuit 20 Number, the signal on the pixel electrode 103 for the pixel 11 that image display is kept is executed because capacitive coupling 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, 2K can be when display resolution is 2K 1920x1080 can also be so the various suitable conditions such as 2560X1440.It similarly, can also when display resolution is 4K, 8K It is that can be performed simultaneously touching 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 shows.It is shown and oneself that is, touch display unit 1 can be performed simultaneously image Capacitance touch sensing.

In particular, the driving circuit 20 can drive when driving the touch display panel 10 to execute image display refreshing Dynamic public electrode 101 executes self-capacitance touch-sensing together, 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.

Since the signal on the touch display panel 10 is by the modulated signal MGND synchronous modulation, and it is modulated after First common voltage Vc1 can be used as simultaneously display drive signals and touch driving signal, and therefore, the touch display unit 1 can It is performed simultaneously image display refreshing and self-capacitance touch-sensing, and the image of the touch display unit 1 is shown and touch-sensing Between and there is no interference or interference it is smaller.

In addition, refresh under the driving of the driving circuit 20 in non-image display when the touch display panel 10 When state, for example, in the ranks gap I (as shown in Figure 2), frame gap when, the driving circuit 20 can also drive public electrode 101 1 With execution self-capacitance touch-sensing.At this point, the state that the touch display panel 10 is entirely kept in image display, due to adopting Modulation is synchronized to the signal that driving circuit 20 is exported to touch display panel 10 with the modulated signal MGND, therefore, is held Row touch-sensing can't change the display pressure difference between two electrodes 101,103 of pixel 11 (see Fig. 7), correspondingly, touching Touch display panel 10 image show it is preferable with the quality of touch-sensing.

Since the driving circuit 20 is driving the touch display panel 10 to execute in the arbitrary process that image is shown, Public electrode 101 can be driven to execute touch-sensing together, therefore, manufacturer can driving circuit 20 described in sets itself as needed Public electrode 101 is driven to execute the period of touch-sensing.Specifically, for example, the whole process or partial routine that show in image In, execute touch-sensing.More specifically, for example, being executed during image display refreshes and/or in the ranks during gap I, frame gap Touch-sensing, etc..

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

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

In this application, either one public electrode 101 of driving executes touch-sensing to driving circuit 20 every time, or every time Drive part public electrode 101 executes touch-sensing simultaneously, as long as the driving circuit 101 is described more by successively repeatedly driving A public electrode 101 has executed a touch-sensing, that is, defining the driving circuit 20 is that timesharing drives the multiple common electrical Pole 101 executes touch-sensing.

Specifically, the driving circuit 20 provides the first common voltage Vc1 to the multiple public electrode simultaneously 101, and timesharing receives the touch-sensing signal exported from the multiple public electrode 101, to realize while drive described more A execution of public electrode 101 image is shown and timesharing drives the multiple public electrode 101 to execute self-capacitance touch-sensing.

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

The multiple public electrode 101 is driven to execute self-capacitance touch-sensing 20 timesharing of driving circuit, such as It can are as follows: the driving circuit 20 executes self-capacitance touch-sensing by row driving public electrode 101.When the driving circuit 20 provides When the first common voltage Vc1 executes self-capacitance touch-sensing and image display to a line public electrode 101, also described in offer First common voltage Vc1 executes image to the public electrode 101 of remaining row and shows.When the driving circuit 20 driving a line is public After electrode 101 has executed self-capacitance touch-sensing, next, driving the public electrode 101 of another row to execute self-capacitance touches sense It surveys and is shown with image, and drive the public electrode 101 of remaining row to execute image and show.In this way, by successively repeatedly, completing to institute Touch-sensing of some public electrodes 101 drives.

The driving circuit 20 can drive public electrode 101 to execute image line by line and show and touch-sensing, can also once together When driving multirow public electrode 101 execute image and show and touch-sensing.

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

In various embodiments, the driving circuit 20 can once drive a line public electrode 101 to execute and touch sense It surveys, can also once drive multirow public electrode 101 to execute touch-sensing, and can once drive all public electrodes 101 simultaneously Execute touch-sensing.In addition, the driving circuit 20 not can also execute touch-sensing by row driving public electrode 101, for example, Touch-sensing is executed by column driving public electrode 101 or drives public electrode 101 to execute touch by irregular driving method Situations such as sensing etc., are also possible.

Further, the multiple public electrode 101 is driven to execute self-capacitance touch-sensing 20 timesharing of driving circuit: It is continuous continual that 20 each driving public electrodes 101 of the driving circuit, which execute between touch-sensing, that is, driving circuit 20 After drive part public electrode 101 has executed touch-sensing at the same time, then, while another part public electrode 101 is driven Execute touch-sensing；Alternatively, the multiple public electrode 101 of 20 intermittent drive of driving circuit executes self-capacitance touch-sensing, Such as, driving circuit 20 executes touch-sensing up to after the first predetermined time, stopping executing touch-sensing in driving public electrode 101 Driving is up to the second predetermined time, then, then public electrode 101 is driven to execute touch-sensing.

So, it when the driving circuit 20 drives the multiple public electrode 101 to execute touch-sensing simultaneously, can also be used Intermittent driving method.That is, being reached when the driving circuit 20 drives the multiple public electrode 101 to execute touch-sensing simultaneously After first predetermined time, stops executing touch-sensing driving up to the second predetermined time, then, then drive the multiple public affairs simultaneously Common electrode 101 executes touch-sensing.

The driving circuit 20 can also be used timesharing driving with drive simultaneously the mode combined to the multiple common electrical It is also possible that pole 101 executes touch-sensing.

It should be noted that the driving circuit 20 can in the public electrode 101 that driving executes touch-sensing adjacent twice It partly overlaps or non-overlapping.

In particular, public electrode 101 the multiple for 20 intermittent drive of driving circuit executes self-capacitance and touches The mode of sensing, defining the period for executing touch-sensing there are public electrode 101 is the first period W1, is defined the multiple public Electrode 101 is performed both by image and shows rather than be performed simultaneously the period of touch-sensing as 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 driving circuit 20 touches display surface using described in the modulated signal MGND synchronous modulation The signal of plate 10, correspondingly, the driving circuit 20 export it is modulated after the first common voltage Vc1 it is same to public electrode 101 Shi Zhihang image is shown and self-capacitance touch-sensing.

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

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

Preferably, the driving circuit 20 does not utilize modulated signal MGND synchronous modulation institute in the second period W2 State the signal of touch display panel 10.Correspondingly, first signal is, for example, the second signal through the modulated signal The modulated signal of MGND.The driving circuit 20 exports first signal and is performed simultaneously figure to the touch display panel 10 As display and self-capacitance touch-sensing.

The second signal includes the second common voltage Vc2.In the second period W2, the output of driving circuit 20 second is public Common voltage Vc2 executes image to the multiple public electrode 101 and shows.

The first common voltage Vc1 is, for example, the second common voltage Vc2 after modulated signal MGND modulation Signal.Relative to ground signal GND is, for example, constant voltage signal to the second common voltage Vc2.Liquid crystal display is filled For setting, the second common voltage Vc2 is, for example, (- 1) V, so, for other types of display device, described second Common voltage Vc2 can also be 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 utility model is not limited thereto, the signals such as the modulated signal MGND, described second common voltage Vc2 It can be the signal of other suitable types, have related description below.

Since in the second period W2, the driving circuit 20 is not touched using described in the modulated signal MGND synchronous modulation The signal of display panel 10 is touched, for example, driven using existing display driving method, therefore, the touch display unit 1 Relative reduction power consumption is wanted using the technical solution of modulation compared in the first period W1 in the second period W2.

It can be seen from the above, driving circuit 20 executes touch-sensing using the multiple public electrode 101 of intermittent drive Self-capacitance touch-sensing not only can be performed in mode, the touch display unit 1 in executing the arbitrary process that image is shown, can also It avoids causing power consumption larger due to using modulation scheme as far as possible.

In the first period W1, the driving circuit 20 for example drives multirow public electrode 101 to execute touch-sensing, or Person drives all public electrodes 101 to execute a touch-sensing, alternatively, it is more to drive all public electrodes 101 to execute Secondary touch-sensing.The case where driving all public electrodes 101 to execute multiple touch-sensing the driving circuit 20 is again It can be there are many situation, for example, the driving circuit 20 drives all public electrodes 101 to execute the number phase of touch-sensing Together, it alternatively, the number that drives a part of public electrode 101 to execute touch-sensing of the driving circuit 20 is identical, drives another The number that part public electrode 101 has executed touch-sensing is identical, and so, the driving circuit 20 drives this two parts public electrode 101 have executed the number difference of touch-sensing.

It should be understood that the duration setting of the second period W2 need to touch 1 whole detection of touch display unit and grasp Make and influence is not present, can also reduce power consumption to a certain extent on the contrary.

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 The duration of section W1 can also be not fully identical or different each other, and the duration of each second period W2 can also be not fully identical Or it is different each other.In addition, for the different types of touch display unit 1, touch display unit 1 different for size, right Difference can also be corresponded in the first period W1, the second period W2 of the different touch display unit 1 of material.Further, for institute Touch display unit 1 is stated to work in different states, for example, blank screen standby mode and bright screen image display state, described first Period W1, the second period W2 duration setting can also be different, to reduce power consumption.

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

It is mainly intermittent with driving circuit 20 below and timesharing drives the multiple public electrode 101 to execute touch-sensing Mode is illustrated touch display unit 1 and its working principle.

Referring to Fig. 3, Fig. 3 is the electrical block diagram of a specific embodiment of the electronic equipment 100.The drive Dynamic circuit 20 includes modulation circuit 21, public voltage generating circuit 22, touches driving circuit 23, data selection circuit 24, control Circuit 25 and signal processing circuit 26.The public voltage generating circuit 22 and the touch driving 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 driving circuit 23 are selected by the data Select the alternative corresponding public electrode 101 of connection of circuit 24.

The public voltage generating circuit 22 is shown for driving public electrode 101 to execute image.

Driving circuit 23 is touched to feel for driving same public electrode 101 to be performed simultaneously image and show to touch with self-capacitance It surveys.

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

Under the control of the control circuit 25, corresponding selection exports the common voltage and produces the data selection circuit 24 Signal caused by raw circuit 22 executes image to corresponding public electrode 101 and shows, and selection exports the touch driving Signal caused by circuit 23 executes image to corresponding public electrode 101 and shows 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 timing.

The modulation circuit 21 is for generating 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:

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

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

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

Four: the first reference signal, the second reference signal voltage be positive voltage of different sizes；

Five: the first reference signal, the second reference signal voltage be negative voltage of different sizes.

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

The modulated signal MGND is, for example, periodically variable square-wave pulse signal.The modulated signal MGND not office It is limited to square-wave pulse signal, can also is other suitable waveform signals, for example, sine wave signal, second level stairstep signal etc..Institute It states modulated signal MGND and is also not limited to periodically variable signal, can also be the signal of aperiodic variation.

In the present embodiment, the first reference signal of the modulated signal MGND is ground signalling GND, second ginseng Examining signal is the driving signal higher than the first reference signal.For example, the ground signalling GND is 0V, the driving signal is 1.8V.So, the ground signalling is 0V, the driving signal is that 1.8V is an example, can be done according to the case where product pair Answer the adjustment of amplitude, the utility model is to this and with no restrictions.

Specifically, the driving 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 second reference signal that the ground signalling GND and the voltage generation circuit 22 for receiving the equipment ground are generated, It is corresponding to generate the modulated signal MGND.To distinguish ground signalling GND, the modulated signal is denoted as MGND.

In the present embodiment, the driving circuit 20 is by providing the modulated signal MGND in driving circuit 20 Partially, reach all signals of synchronous modulation touch display panel 10.As long as that is, this partly on signal be modulation Signal MGND, all signals of the touch display panel 10, which synchronize, to be become through the modulated letter of modulated signal MGND Number.

It is defined on the first period W1 and is applied with the ground of modulated signal MGND as modulation ground, ground signalling is applied with difference The equipment of GND.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 ground terminal of the circuit in domain 80 on the basis of earth signal GND is for loading ground signalling GND, using modulated signal MGND as base The ground terminal of circuit in quasi- domain 90 is used for load-modulate signal MGND.Further, for being to modulate the circuit on ground, The modulated signal MGND that its ground reference by modulation loads；For being the circuit on ground, ground reference with equipment The ground signalling GND by equipment loaded.

That is, modulation ground is modulated to modulated signal MGND by ground signalling GND, in the first period W1 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 becoming equipment, is used for transmission ground signalling GND and unmodulated signal MGND。

Predeclared to be, in the present embodiment, in the first period W1, the public voltage generating circuit 22 is touched Driving circuit 23, data selection circuit 24 and control circuit 25 are located in the domain 90, and the modulation circuit 21 and voltage generate Circuit 27 is located in the domain 80.A part of 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, which exports the modulation by the modulated terminal M, to be believed Number MGND is given to the ground terminal of each circuit in domain 90, thus, using modulated signal MGND as in the domain 90 of voltage basis of reference The modulated signal of circuit output modulated signal MGND gives the touch display panel 10.Wherein, the modulated terminal M connection is adjusted System ground, or one end as modulation ground.In addition, (e.g., aftermentioned to hold for instance in the element of vacant state on touch display panel 10 Row image display keep pixel electrode 103, see Fig. 7) on signal as because capacitive coupling effect be superimposed as described in modulated signal MGND.Therefore, all electric signals on the first period W1, the touch display panel 10 become through the modulated signal The modulated signal of MGND.

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

In the second period W2, the modulation circuit 21, public voltage generating circuit 22 touch driving circuit 23, data choosing Selecting circuit 24, control circuit 25, signal processing circuit 26, voltage generation circuit 27 is using ground signalling GND as Voltage Reference 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 driving signal of voltage generation circuit 27 is corresponding to generate the modulated signal MGND, and provides the modulated signal MGND to institute State modulation ground.The public voltage generating circuit 22 is corresponding to generate the first common voltage Vc1, and is selected by the data Circuit 24 is supplied to the corresponding execution of public electrode 101 image and shows.The touch driving circuit 23 is corresponding to generate described first Common voltage Vc1, and the corresponding execution of public electrode 101 image is supplied to by the data selection circuit 24 and is shown and oneself Capacitance touch sensing.The signal processing circuit 26 receives the touch-sensing signal exported from the touch driving circuit 23, To obtain touch information.That is, touch driving circuit 23 output is used simultaneously to the first common voltage Vc1 of public electrode 101 Make display drive signals and touches driving signal, first public affairs of the output of public voltage generating circuit 22 to public electrode 101 Common voltage Vc1 is used only as display drive signals.

The touch driving circuit 23 and public voltage generating circuit 22 are exported to the first of the multiple public electrode 101 Common voltage Vc1 is through the modulated identical signal of the modulated signal MGND, and the touch driving circuit 23 can be into one The touch-sensing signal that step transmission is sensed from public electrode 101 is to signal processing circuit 26, to obtain touch information, because This, the driving circuit 20 can drive touch display panel 10 to be performed simultaneously image and show and self-capacitance touch-sensing.

It is driven since the first common voltage Vc1 that the touch driving circuit 23 is supplied to public electrode 101 had both been used as touch Dynamic signal, and be used as display drive signals and therefore held in the 22 drive part public electrode 101 of public voltage generating circuit When row image is shown, the touchs driving circuit 23 can drive remaining public electrode 101 execution image to show and self-capacitance together Touch-sensing.Therefore, the touch display unit 1 of the utility model is executing among the arbitrary process that image is shown, can be simultaneously Execute touch-sensing, and, touch-sensing and image show between it is noiseless or interfere caused by being shown to image less.

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

Preferably, the data selection circuit 24 is controlled by the control circuit 25 in the second period W2, it is the multiple The second common voltage Vc2 on public electrode 101 is all from the public voltage generating circuit 22.The touch driving circuit 23 for example can further export the second common voltage Vc2 to data selection circuit 24, but the selection output of data selection circuit 24 comes From the second common voltage Vc2 of the public voltage generating circuit 22 to public electrode 101, thus, so that the touch is shown Device 1 executes image in the second period W2 and shows and non-executing touch-sensing.

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

During showing a frame image, the touch display unit 1 may include the first period W1, multiple first Period W1, a part of first period W1, the part of first period W1 and the first period W1 or multiple first periods The part of W1 and the first period W1.

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

The touch driving circuit 23 further receives the touch-sensing signal 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 is electrically connected of touch driving circuit 23 target object (for example, The suitable objects such as finger) touch or close to whether, it is corresponding export different touch-sensing signals and give touch-sensing driving Circuit 23, correspondingly, the touch driving 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, alternatively, even if The signal from public electrode 101, but the circuit structure based on public voltage generating circuit 22 itself are received, regardless of public electrode Whether 101 tops have target object to touch or approach, and the public electrode 101 being electrically connected with public voltage generating circuit 22 exports Signal be basically unchanged, so that touch information can not be obtained.

Preferably, the public voltage generating circuit 22 shares same signal source 221, institute with the touch driving circuit 23 Signal source 221 is stated by the modulation of the modulated signal MGND, one first reference voltage signal of corresponding generation.The common voltage produces Raw circuit 22 exports identical first common electrical according to first reference voltage signal is corresponding with the touch driving circuit 23 Press Vc1 to the multiple public electrode 101, wherein the public electrode 101 being electrically connected with public voltage generating circuit 22 executes Image shows rather than is performed simultaneously touch-sensing, is performed simultaneously figure with the public electrode 101 that driving circuit 23 is electrically connected is touched As display and self-capacitance touch-sensing.

Since the touch driving circuit 23 provides signal identical with the public voltage generating circuit 22 to common electrical Pole 101, therefore, the touch driving circuit 23 is while driving public electrode 101 to execute self-capacitance touch-sensing, not The public electrode 101 for influencing execution self-capacitance touch-sensing executes normal image and shows.In addition, since the common voltage produces Raw circuit 22 shares same signal source 221 with the touchs driving circuit 23, therefore, the public voltage generating circuit 22 and It is described touch driving circuit 23 output to the multiple public electrode 101 signal can reach it is identical or essentially identical, thus really Protect the quality that touch-sensing and image are shown.

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

The signal source 221 includes ground terminal a and output end b.The ground terminal a is connect with the modulation.It is described defeated Outlet b is connect with the follower 222.The signal source 221 is, for example, DC source, and so, the utility model does not limit this System, the signal source 221 can also be 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 It states data selection circuit 24 and is supplied to corresponding public electrode 101 and executes image and show.The follower 222 for example, first is put Big device, so, the utility model is not limited thereto, and the follower 222 can also be other suitable circuit structures, is not limited to In first amplifier.In the specific embodiment, it is illustrated so that follower 222 is the first amplifier as an example.Institute Stating the first amplifier 222 includes third power end c1, third ground terminal d1, the first in-phase end e1, the first reverse side f1 and first Output end g1.Wherein, the third power end c1 is used for loading power voltage VDD1.The third ground terminal d1 is adjusted for connecting System ground.The first in-phase end e1 with the output end b of the signal source 221 for connecting.The first reverse side f1 with it is described First output end g1 is shorted.The first output end g1 is connect with the data selection circuit 24.

The voltage regulator 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 pressure stabilizing.In the present embodiment, the voltage regulator 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.

When work, the modulated signal MGND is received in the first period W1, the ground terminal a and third ground terminal d1, The signal source 221 is corresponding 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 to export identical with first reference voltage signal first for correspondence Voltage Vc1 gives the data selection circuit 24, is supplied to corresponding public electrode 101 by the data selection circuit 24 and holds Row image is shown.

Ground signalling GND, the signal source are received in the second period W2, the ground terminal a and third ground terminal d1 221 correspondences export the second reference voltage signal to the first amplifier 222, first amplifier 222 by the output end b It is in empty short status, then corresponding to transmit second common voltage Vc2 identical with second reference voltage signal to the data Selection circuit 24, and the multiple execution of public electrode 101 image is supplied to by the data selection circuit 24 and is shown.

The touch driving circuit 23 is for example including the signal source 221 and multiple operational amplifiers 231.Each operation 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 Ground terminal d2, the second in-phase end e2, the second reverse side f2 and second output terminal g2.Wherein, the 4th power end c2 is used for Loading power voltage VDD2.The 4th ground terminal d2 is for connecting modulation ground.The second in-phase end e2 is used for and the letter The output end b connection in number source 221.The second reverse side f2 is connect with the data selection circuit 24, and further passes through institute Feedback branch 233 is stated to connect with the second output terminal g2.The second output terminal g2 further with the signal processing circuit 26 connections.

The feedback branch 233 is for example including feedback capacity 233a and Resetting Switching 233b.Preferably, the feedback capacity 233a and the Resetting Switching 233b are connected in parallel between the second reverse side f2 and the second output terminal g2.

When work, modulated signal MGND is received in the first period W1, the 4th ground terminal d2.Second amplifier 232, in empty short status, receive the first reference voltage signal from the signal source 221, and the first common electrical of corresponding output It presses Vc1 to the data selection circuit 24, corresponding public electrode 101 is supplied to by the data selection circuit 24.It is described Feedback branch 233 is used for transmission touch-sensing signal that public electrode 101 senses to the signal processing circuit 26.

Since 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 analytical calculation, 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 as the columns of the multiple public electrode 101.Each fortune It calculates amplifier 231 and one column public electrode 101 of connection may be selected by the way that data selection circuit 24 is corresponding.So, the multiple operation is put The number of big device 231 can also be identical as the line number of the multiple public electrode 101.In addition, the utility model is not limited thereto, For example, the public electrode 101 of each column can also corresponding selection to connect the embodiments such as two operational amplifiers 231 also possible.

The driving circuit 23 that touches of the utility model provides the first common voltage generated with public voltage generating circuit 22 The identical touch driving signal of Vc1 to public electrode 101, thus, the touch driving signal can drive public electrode 101 Not only image had been executed to show but also execute self-capacitance touch-sensing, therefore, the multiple public electrode of the touch display unit 1 101 while executing image display, can further execute touch-sensing.

Further, each letter is distinguished compared to the touch driving circuit 23 and the public voltage generating circuit 22 Number source, since the touch driving circuit 23 of the application and the public voltage generating circuit 22 share same signal source 221, Therefore, the touch driving circuit 23 is exported by the data selection circuit 24 to institute with the public voltage generating circuit 22 State multiple public electrodes 101 the first common 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 driving circuit 23 also may be selected and generated with the common voltage Circuit 22 distinguishes each circuit structures such as a signal source.

In the second period W2, with becoming 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 selection of data selection circuit 24 output and come from The second common voltage Vc2 on common voltage electricity production road 22 executes image to the multiple public electrode 101 and shows.

Further, in some change embodiments, first can also be arranged between signal source 221 and follower 222 It switchs (not shown), second switch (not shown) is set between signal source 221 and operational amplifier 231, accordingly, first Period W1, first switch and second switch are in closed state, the second period W2, and the first switch is in closure, described Second switch is in the open state can 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 connect with first data selector 241, first data selector 241 with it is the multiple public Electrode 101 is separately connected.Each operational amplifier 231 is separately connected one second data selector 242, every one second data selection Device 242 is separately connected a column public electrode 101.First data selector 241 and the multiple second data selector 242 It is respectively connected to the control circuit 25.The control circuit 25 controls first data selector 241 and the multiple The signal output timing of two data selectors 242.

Citing, the multiple public electrode 101 are that the matrix form arranged in 26 rows 40 is arranged, accordingly, the multiple operation The quantity of amplifier 231 is 40, and the quantity of second data selector 242 is 40.First data selector 241 packet The first output port O1 is included, for exporting the signal from the public voltage generating circuit 22 to corresponding public electrode 101. The quantity of the first output port O1 is identical as the line number of the multiple public electrode 101, and as 26.Every one second data Selector 242 includes second output terminal mouth O2, for exporting from the signal for touching driving circuit 23 to corresponding public Electrode 101.The quantity of the second output terminal mouth O2 is identical as the line number of the multiple public electrode 101, and as 26.It needs Illustrate, in Fig. 2, is limited to the size of diagram, part circuit structure is actually only shown, is put for example, only showing 2 operations Big 231,2 the second data selectors 242 of device and part public electrode 101.

In the present embodiment, the second output terminal mouth O2 of every one second data selector 242 is separately connected a common electrical Pole 101.Every one first output port O1 is respectively connected to a second output terminal mouth O2 and public affairs for each second data selector 242 Between common electrode 101, to save the quantity of connecting line L, the first different output port O1 connects different each other Two output port O2.

So, ground is changed, in other embodiments, the quantity of first data selector 241 can also be multiple, and It is not limited to one, correspondingly, the first output port O1 of the multiple first data selector 241 and the multiple second number Adjustment can be corresponded to according to the connection relationship between the second output terminal mouth O2 of selector 242, for example, every one first data selector 241 are connected with the second data selector of part 242, so, can also be, the first output end of every one first data selector 241 Mouthful O1 is connect, etc. with the part second output terminal mouth 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 driving 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 executed a touch-sensing.The number that first data selector 241 selects 25 under the control of control circuit 25 for 26 According to selector, when the multiple second data selector 242 exports the first common voltage Vc1 to the public electrode 101 with a line When, first data selector 241 exports the first common voltage Vc1 from public voltage generating circuit 22 to remaining each row Each public electrode 101.It should be noted that 26 touch drivings can be in one or more first periods W1 completions.

In the second period W2, first data selector 241 becomes 26 numbers for selecting 26 under the control of control circuit 25 According to selector, the second common 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 driving circuit 23 and public voltage generating circuit 22 of the touch display unit 1 are not limited to above-mentioned Circuit structure can also be other suitable circuit structures.For example, the data selection circuit 24 is not limited to the choosing of the first data Device 241 and the second data selector 242 are selected, can also be other suitable switching circuit structures.

By the data selection circuit 24, on the one hand can reduce driving 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 execute image display, Timesharing drives public electrode 101 to execute touch-sensing.

As previously mentioned, the touch display unit 1 can also be shown with touch-sensing for image in lasting progress, example Such as, in time, the public voltage generating circuit 22 persistently provides first common voltage with driving circuit 23 is touched Vc1 is to public electrode 101, and spatially, the public voltage generating circuit 22 matches drive with the touch driving 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 It remains that 26 select 25 according to selector 241, controls the multiple second data selector 242 and remain that 26 select 1.

In another example only the multiple public electrode 101 persistently can also be driven to be performed simultaneously figure by selection touch driving 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 It selects between circuit 24, the public voltage generating circuit 22, the touch driving circuit 23 and the multiple public electrode 101 Relationship 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, details are not described herein again.

In addition, in some embodiments, the driving circuit 20 for example can further comprise fingerprint driving circuit, described Fingerprint driving circuit alternative connects the multiple public electrode 101, when the driving circuit 20 is in drive part common electrical When pole 101 is performed simultaneously touch-sensing and image and shows, the fingerprint driving circuit can also drive part public electrode 101 simultaneously It executes fingerprint sensing and image is shown, 22 drive part public electrode of public voltage generating circuit executes image and shows.Therefore, originally In application, what driving public electrode 101 worked is not limited to public voltage generating circuit 22 and touches driving circuit 23, may be used also To include the circuit of other suitable types or proper function, corresponding driving public electrode 101 executes 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, it first active opens 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 connect with control unit 215.First active switch 211 The second transmission end T2 connect with the first transmission end T3 of the second active switch 213 and in defining an output node on connecting line The first transmission end T1 of N, 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 corresponds to control by controlling first, second active switch 211,213 It makes the output node N and alternately exports 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 driving letter Number.Correspondingly, the second transmission end T4 is connect with the voltage generation circuit 27, and the first transmission end T1 with equipment connects It connects, for receiving ground signalling GND, the node N gives modulation ground for exporting the modulated signal MGND.

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

The working principle of the modulation circuit 21 are as follows: in the first period W1, described control unit 215 is for controlling 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；In the second period W2, institute It states control unit 215 and exports ground signalling GND to modulation for controlling the modulation circuit 21, modulation ground becomes and sets at this time It is standbyly identical.

It should be further noted that the electronic equipment 100 has one and is with ground signalling GND in the first period W1 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 driving circuit 23 is touched to public electrode 101, further receives and come from the public electrode 101 The touch-sensing signal of body output, to obtain touch information, therefore, the touch driving circuit 23 is driving the touch display Principle when panel 10 executes touch-sensing 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 signal-to-noise ratio be improved, and the touch driving circuit 23 is in domain 90 Certain circuit structures correspondingly can be also simplified, and then also can simplify circuit structure, save product cost.For example, with touching Touch driving circuit 23 signal source 221 and it is existing touch driving circuit signal source 221a (seeing below Fig. 5) for carry out Explanation.

Also referring to Fig. 5 and Fig. 6, Fig. 5 is that the circuit structure of the existing signal source 221a for touching driving circuit is illustrated Figure.Fig. 6 is the electrical block diagram for touching the signal source 221 of driving circuit 23.It needs to illustrate in advance, existing touch At work, signal source 221a is using ground signalling GND as voltage reference to driving circuit.The touch driving circuit of the application When 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 and resistance Ra are connected in series in power end P1 with equipment GND Between.One end of first switch K1a is connected between current sources la and resistance Ra, and the other end, which is connected to, touches the same of driving circuit Phase end h.One end of second switch K2a is connected between first switch K1a and in-phase end h, and the other end is connected to be connect for loading The equipment of earth signal GND.It is corresponding to generate touch-sensing by controlling the alternate conduction of first switch K1a and second switch K2a Driving signal gives in-phase end h.Wherein, relative to the equipment GND is kept constant the power end P1.

Relatively, the signal source 221 includes that current source Ib and resistance Rb, the current source Ib and resistance Rb are connected in series Between power end P2 and ground for load-modulate signal MGND.Touch the receiving end of driving circuit 23, i.e. the second in-phase end G2 is connected between the current source Ib and resistance Rb.Since the modulated signal MGND is variation, power end P2, Output voltage between the current source Ib and resistance Rb changes with the variation of the modulated signal MGND of modulation ground, from And the corresponding touch-sensing driving signal that generates is to the second in-phase end g2.In addition, can also be in such as modulation between power end P2 Increase capacitor, to keep the stability of signal.

Compared to signal source 221a, the circuit structure of signal source 221 becomes simply, and touching caused by signal source 221 Touching sensing driving signal will stablize compared to touch-sensing driving signal caused by signal source 221a.

Referring to Figure 2 together, Fig. 3 and Fig. 7, Fig. 7 are the circuit knot of a specific embodiment of the electronic equipment 100 Structure schematic diagram.As previously mentioned, in this embodiment, the touch display unit 1 is said by taking liquid crystal display device as an example It is bright.So, ground is changed, when the touch display unit 1 is other types of display device, the touch display unit 1 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 correspond to the structure for deriving learn easily, should all fall into the protection scope 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 drive It is used to execute image under the driving of dynamic circuit 20 to show and touch-sensing.Each pixel 11 include the public electrode 101, as Plain electrode 103 and switch unit 104.In the present embodiment, the switch unit 104 includes control switch 105.The control Making switch 105 includes coordination electrode G, the first transmission electrode S and the second transmission electrode D.The coordination electrode G and described first Transmission electrode S is connect with the driving circuit 20.The second transmission electrode D is connect with the pixel electrode 103.The driving Circuit 20 is for driving the conducting of control switch 105 and cut-off.In the present embodiment, the switch unit 104 includes one Control switch 105, so, in other embodiments, the switch unit 104 may also comprise two control switches 105 or more Control switch can also further comprise so other circuit elements, such as storage circuit etc..Two control switch 105 is, for example, It is connected in series.

The control 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 utility model is not limited thereto, and the control switch 105 can also be other suitable The switch of type.When control switch 105 is thin film transistor switch, coordination electrode G is the grid of thin film transistor switch, the One transmission electrode 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 respectively includes a pixel electrode 103 and a control switch 105.Due to The generally large size in pixel electrode 103 of the size of public electrode 101, correspondingly, multiple pixels 11 share same public Electrode 101.So, in other change embodiments, a public electrode 101 can also be respectively included for each pixel 11.

In the first period W1, the driving circuit 20 by providing the first scanning open signal Vg1 to control switch 105, It drives the control switch 105 to be connected, and provides the first gray scale voltage Vd1 to pixel electrode by the control switch 105 of conducting 103, the first common voltage Vc1 is provided to public electrode 101, is refreshed with driving the pixel 11 to execute image display.Wherein, The first scanning open signal Vg1, the first gray scale voltage Vd1 and the first common voltage Vc1 are through the tune Signal after signal MGND synchronous modulation processed.

Refresh in general, the driving circuit 20 drives the multiple pixel 11 to execute image display by row.At first Section W1, when the driving circuit 20, which drives the pixel 11 of certain a line to execute image display, to be refreshed, the driving circuit 20 By providing the first scanning pick-off signal Vg2 to the control switch 105 of the pixel 11 of remaining row, so that the picture of remaining row The control switch 105 of vegetarian refreshments 11 is ended, thus, so that the pixel 11 of remaining row is in image and shows hold mode.Its In, the first scanning pick-off signal Vg2 is through the modulated signal of modulated signal MGND.

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

To avoid interference of the touch-sensing to image display refreshing, preferably, the driving circuit 20 drives execution simultaneously Non-overlapping between the pixel 11 of touch-sensing and the pixel 11 for executing image display refreshing is shown for example, executing image Interval predetermined row is in the picture for executing image display holding between the pixel 11 of refreshing and the public electrode 101 for executing touch-sensing Vegetarian refreshments 11.It is controlled by software or hardware or software and hardware, is shown to realize to execute the pixel 11 of touch-sensing and execute image Preset distance can be kept between the pixel 11 of refreshing and non-overlapping.

So, ground is changed, in other embodiments, executes the pixel 11 of image display refreshing in driving circuit 20 It also may be selected to be performed simultaneously touch-sensing under driving, alternatively, being performed simultaneously the pixel 11 and execute touch that image display refreshes Between the case where also selectable portion is overlapped between the pixel 11 of sensing, is partly overlapped for example, pixel 11 completely or partially Share a public electrode 101.

Relatively, in the second period W2, the driving circuit 20 for example provides the second scanning open signal Vg3 and opens to control 105 are closed, activates control switch 105, and provide the second gray scale voltage Vd2 to pixel electrode by the control switch 105 of activation 103, the second common voltage Vc2, which is provided, to public electrode 101 executes image display refreshing.When the driving circuit 20 drives certain When the pixel 11 of a line executes image display and refreshes, the second scanning pick-off signal Vg4 is provided to the pixel 11 of remaining row Control switch 105 is ended, thus, 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 The modulated signal of MGND.The first scanning pick-off signal Vg2 is, for example, the second scanning pick-off signal Vg4 through the tune The modulated signal of signal MGND processed.

The first gray scale voltage Vd1 is that corresponding second gray scale voltage Vd2 is modulated through the modulated signal MGND Signal.For example, when one first gray scale voltage Vd1 is the second gray scale voltage Vd2 through the modulated signal of modulated signal MGND, Then, the pressure difference between the second gray scale voltage Vd2 and the second common 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: the 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, in order to enable liquid crystal molecule is not polarized, for same aobvious Show that 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 multiple data lines 291.It is described a plurality of to sweep It retouches line 281 and the multiple data lines 291 is, for example, the cross arrangement that insulate.The multi-strip scanning line 281 is for example prolonged in X direction It stretches, arranges along Y-direction.The multiple data lines 291 for example extend along Y-direction, arrange in X direction.Every scan line 281 is distinguished Connect the coordination electrode G of the control switch 105 of one-row pixels point 11.Each data line 291 is separately connected a column pixel 11 First transmission electrode S of control switch.

The multi-strip scanning line 281 is used for transmission the first scanning open signal Vg1, second from the driving circuit 20 Open signal Vg3, the first scanning pick-off signal Vg2 or the second scanning pick-off signal Vg4 are scanned to the control of control switch 105 Electrode G.The multiple data lines 291 are used for transmission from the first gray scale voltage Vd1 of the driving circuit 20 or the second grayscale First transmission electrode S of the voltage Vd2 to control switch 105.

The driving 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 the multiple data lines 291.The scan drive circuit 28 and the data drive circuit 29 are equal It is connect 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 are provided to the data drive circuit 29.The generation circuit of scanning signals 28a with it is described Scan drive circuit 28 connects.The generation circuit of scanning signals 28a is for generating the first scanning open signal Vg1, the Two scanning open signal Vg3, the first scanning pick-off signal Vg2 or the second scanning pick-off signal Vg4, and provide described first and sweep Retouch open signal Vg1, second scanning open signal Vg3, first scanning pick-off signal Vg2 or second scanning pick-off signal Vg4 to The scan drive circuit 28.The circuit structure of the scan drive circuit 28 for example including shift register is received to come from and be swept The scanning open signal and scanning pick-off signal of signal generating circuit 28a, and the corresponding offer under the control of control circuit 25 are provided Open signal and scanning pick-off signal are scanned to corresponding scan line 281.

In the present embodiment, when 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 it is described first scanning open signal Vg1, it is described first scanning pick-off signal Vg2 to institute Scan drive circuit 28 is stated, the scan drive circuit 28 corresponding output described first under the timing control of control circuit 25 is swept Open signal Vg1, the first scanning pick-off signal Vg2 are retouched respectively to corresponding scan line 281, the data drive circuit 29 By the modulation of the modulated signal MGND of the modulation circuit 21, the first gray scale voltage Vd1 is exported to the multiple data lines 291, corresponding pixel electrode 103 is supplied to the control switch 105 by activation and executes image display refreshing.The common electrical Press generation circuit 22 and the touchs driving circuit 23 by the data selection circuit 24 the first common voltage Vc1 of offer to The multiple public electrode 101.

In addition, the signal on the pixel electrode 103 in the pixel 11 that image display is kept is acted on by capacitive coupling Become the signal modulated through the modulated signal MGND.Therefore, the pixel electricity of each pixel 11 of the touch display panel 10 Signal on pole 103 and public electrode 101 becomes the signal after the modulated signal MGND synchronous modulation.To described Driving circuit 20 is driving the touch display panel 10 to execute in the arbitrary process that normal picture is shown, can drive public affairs simultaneously Common electrode 101 executes touch-sensing.

For example, when scan drive circuit 28 provides the first scanning open signal Vg1 to scan line 281, common voltage Generation circuit 22 provides the first common voltage Vc1 and shows to the execution image of part public electrode 101, touches driving circuit 23 and mentions Image is executed to remaining public electrode 101 for the first common voltage Vc1 to show and self-capacitance touch-sensing.

Compared to the touch display unit for the Incell type that existing multiplexing public electrode executes touch-sensing, the application Touch display unit 1 pass through using the modulated signal MGND synchronous modulation touch display panel 10 all signals, thus So that can be further used as touching driving signal, therefore, the drive for driving public electrode 101 to execute the signal that image is shown Dynamic circuit 20 can similarly execute certainly public electrode 101 when offer first scans open signal Vg1 to scan line 281 Capacitance touch sensing, correspondingly, touch display unit 1, which is not necessarily limited by, is expert at gap I, frame gap to drive public electrode 101 Touch-sensing is executed, thus, there can't be 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 executes touch-sensing in the arbitrary process of display image, to image It is normal display without influence or influence it is smaller.

It should be noted that first common voltage Vc1 of the output of driving circuit 20 to the multiple public electrode 101 It is all the same, and, the first common voltage Vc1 is the signal of variation compared to ground signalling GND, thus, it can be used described the One common voltage Vc1 is further used as touching driving signal, and correspondingly, the driving circuit 20 is held in driving public electrode 101 While row normal picture is shown, public electrode 101 can further be driven to execute self-capacitance touch-sensing.

In addition, in the second period W2, the generation circuit of scanning signals 28a output 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 Lower corresponding the second scanning of the output open signal 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 the multiple 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 voltage Vc2 to institute State multiple public electrodes 101.To drive the touch display panel 10 to execute image and show.

For liquid crystal display device, the second common voltage Vc2 is typically chosen the relatively described ground signalling GND and is Constant constant voltage signal, 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., the first reference signal of modulated signal MGND is 0V, the second reference Signal is 1.8V.Correspondingly, the alternating voltage signal of the first common voltage Vc1 is (- 1) V voltage signal and 0.8V is defeated Signal out.

It should be noted that in Fig. 7, modulation circuit 21 is only shown and exports modulated signal MGND to touching driving circuit 23, modulation circuit 21 is omitted and exports modulated signal MGND to the circuits with ground terminal other in domain 90, such as common 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 Stating modulation circuit 21 is to have to export modulated signal MGND to the circuits with ground terminal other in domain 90.

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

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 schematic diagram of the section structure of touch display panel 10 shown in Fig. 8.The touch display panel 10 includes the first base Plate 106, the second substrate 107, display medium layer 108.The display medium layer 108 in this embodiment so can for liquid crystal layer Change ground, in other embodiments, can correspond to other display mediums.103 He of pixel electrode of the multiple pixel 11 Control switch 105, the multi-strip scanning line 281 and the multiple data lines 291 are arranged in the second substrate 107.Institute State display medium layer 108 and the setting of the multiple public electrode 101 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 For example glass substrate, film substrate etc..

The second substrate 107 and the pixel electrode 103 being arranged in the second substrate 107, control switch 105, The multi-strip scanning line 281 and the multiple data lines 291 are often collectively referred to as array (Array) substrate.Relatively, described It is provided with colored filter (not shown) on one substrate 106, to realize that color 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 receives touch-sensing for image.So, ground is changed, the colored filter can also be put It sets in the second substrate 107.In some type of display device, the colored filter also be can be omitted, alternative Ground is carried out luminous using the light source of three color of red, green, blue.In addition, for different types of display device, the second substrate 107, which 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 utility model is single side touch display panel to touch display panel 10 or double Face touch display panel is simultaneously not particularly limited.

Preferably, the setting of the multiple public electrode 101 the display medium layer 108 and the second substrate 107 it Between.In the present embodiment, the multiple public electrode 101 is located at the display medium layer 108 and the multiple pixel electrode Between 103.For example, the multiple public electrode 101 is located on the same floor, the multiple pixel electrode 103 is located on the same floor, two Person is stacked.In addition, due to the touch display unit 1 be by taking liquid crystal display device as an example, correspondingly, the liquid crystal display Device is the liquid crystal display device of fringe field switching type (Fringe Field Switching, FFS).The multiple public electrode Slit 101a is respectively arranged on 101.To form fringe field between pixel electrode 103.In this embodiment, institute Slit can be not provided on 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, 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 schematic diagram.Figure 11 is the schematic top plan view of touch display panel 10 shown in Figure 10.The multiple public electrode 101 can also It is arranged between pixel electrode 103 and the second substrate 107.The multiple public electrode 101 and the multiple pixel electrode 103 it Between be stacked.Slit 103a is respectively set on the multiple pixel electrode 103, to form edge between public electrode 101 Electric field.In this embodiment, it can be not provided with slit on the multiple public electrode 101, is respectively whole piece electrode, so, can be changed More, slit has been may also set up on the multiple public electrode 101, to improve edge electric field strength.

In addition, change ground, the touch display panel 10 can also for plane conversion type (In-Plane Switching, IPS liquid crystal display panel), or, the touch display panel 10 can also be 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 State the connection of touch display unit 1.The main control chip 3 is used to carry out 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 is also possible to 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 can also be central processing unit (Central Processing Unit, CPU).

The main control chip 3 includes power supply end 31 and ground terminal 33.The power supply end 31 connects driving circuit 20, for powering for driving circuit 20.The connection of ground 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 The corresponding driving touch display panel 10 of display driver circuit 20a signal according to provided by the main control chip 3 is stated to execute 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) The circuits such as road 23 and public voltage generating circuit 22.The touch driving circuit 23, which provides, touches driving signal to public electrode 101 execute touch-sensing, and the main control chip 3 receives the signal exported from signal processing circuit 26, and corresponding control electronics is set Whether standby 100 execute corresponding function.In addition, the main control chip 3 leads to for example by providing control signal to control circuit 25 It crosses control circuit 25 and controls the data selection circuit 24, drive public electrode 101 to hold to correspond to the control driving circuit 20 The timing of row touch-sensing.

It should be noted that in the first period W1, since the main control chip 3 is located in domain 80, the display driving electricity Road 20a, the circuits such as driving circuit 23 touched be located in domain 90, therefore, main control chip 3 in domain 80 in domain 90 Display driver circuit 20a, the signal transmission that touches between the circuits such as driving circuit 23 need to for example be handled via level conversion, with Meet the pressure-resistant demand of electronic component.Relatively, it in the second period W2, main control chip 3 and display driver circuit 20a, touches and drives If the signal transmission between the circuits such as dynamic circuit 23 need to be handled via level conversion, level conversion processing is carried out, if without warp It is handled by level conversion, then without level conversion processing.

It is the knot of an embodiment of signal processing circuit 26 shown in Fig. 3 also referring to Fig. 3, Figure 12 and Figure 13, Figure 12 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 correspondingly connected with One operational amplifier 231 is touched for the sensing signal exported from the operational amplifier 231 to be handled and calculated Touch information.

The signal processing unit 261 includes analog to digital signal conversion unit 263 and computing unit 265.The mould The signal that quasi--digital signal converting unit 263 exports the second output terminal g2 from operational amplifier 231 carries out modulus Conversion, and the digital signal after conversion is exported to the computing unit 265.The computing unit 265 is according to the digital signal It calculates and obtains touch coordinate.The computing unit 265 is connect with the main control chip 3, for exporting the letter for indicating touch coordinate Number give main control chip 3.The main control chip 3 corresponds to controlling electronic devices 100 according to the signal for indicating touch coordinate and executes Corresponding function.

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

In addition, increasing corresponding circuit module or clipped electricity in operational amplifier 231 and signal processing unit 261 Road module is also possible, or, using other circuit modules or circuit unit also realizing identical function equally and be can be with 's.It specifically, e.g., further comprise filter unit between analog to digital signal conversion unit 263 and second output terminal g2, The filter unit exports filtered signal to simulation-again after being filtered to the second output terminal g2 signal exported Digital signal converting unit 263.

For another example can further be set between the computing unit 265 and the analog to digital signal conversion unit 263 Level conversion unit 264 is set, what the level conversion unit 264 was used to export the analog to digital signal conversion unit 263 Digital signal carries out level conversion, and the digital signal after output level conversion is to computing unit 265.The computing unit 265 It is calculated according to the digital signal after level conversion and obtains touch coordinate.In another example the computing unit 265 and the level conversion 264 transposition of unit, correspondingly, the analog to digital signal conversion unit 263 export the digital signal after conversion to institute State computing unit 265.The computing unit 265 calculates according to the digital signal obtains touch coordinate, and will indicate to touch to sit Target signal is exported to level conversion unit 264, the level conversion unit 264 to receive the signal that indicates touch coordinate into After line level conversion, then export to the main control chip 3, it is so and possible, it needs according to computing unit 265 and simulation- The pressure-resistant situation of digital signal converting unit 263 determines.

Figure 14 is please referred to, Figure 14 is the structural schematic diagram 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 line L1 is for example arranged in institute It states around multiple pixels 11.So, the earth element is not limited to the ground line 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 line L1 also can be omitted in other embodiments.

The driving circuit 20 can further comprise the first ground terminal 201 and the second ground terminal 203.The modulation circuit 21 It is connected between first ground terminal 201 and second ground terminal 203.Wherein, first ground terminal 201 connects described Earth element on touch display panel 10, in the present embodiment, first ground terminal 201 connect the ground line L1. Second ground terminal 203 with connecting equipment, receives ground signalling GND.In the first period W1, the modulation circuit 21 passes through institute It states the first ground terminal 201 and exports 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 ground terminal 201.

The driving circuit 20 for example can further comprise slope controller 204, the slope controller 204 and the tune Circuit 21 processed connects, for controlling the slope for the modulated signal that the modulation circuit 21 exports, 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, described oblique Rate controller 204 also can be omitted.

The driving 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., store, solve Compression, color adjustment etc.).The level conversion unit 264 setting the display processing circuit 205 and control circuit 25 it Between, for the display processing circuit 205 treated display data carry out level conversion, and output level conversion after show Registration is according to the control circuit 25.The control circuit 25 exports corresponding display data and clock signal to the display Driving circuit 20a.The display driver circuit 20a converts the display data received as gray scale voltage, and according to the timing Signal exports the first gray scale voltage Vd1 in the first period W1 and executes image display refreshing to corresponding pixel electrode 103, second Period W2 exports the second gray scale voltage Vd2 and executes image display refreshing to corresponding pixel electrode 103.The display data are preferred For digital 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 solution, 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 It, 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 solution, since domain 80 is different from the voltage reference in domain 90, So level conversion need to be done.

It accordingly, for example can be by the way that switching element be arranged, controlled respectively at first in level conversion unit 264 Whether section W1 does level conversion to the corresponding signal of reply with the second period W2.So, the switching element or other suitable Circuit structure may also be arranged on except level conversion unit 264.

In the present embodiment, the division to each circuit module in driving circuit 20 or circuit unit in two domains 80,90 Situation are as follows: by display driver circuit 20a, touch driving 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 the 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 265, voltage generation circuit 27, slope controller 204 are divided in the domain 80 on the basis of GND；Level conversion unit 264 Across two domains, that is, a part is in domain 80, and a part is in domain 90, for those of ordinary skill in the art, according to this The record of application and circuit theory are can to determine that level conversion unit 264 is located at the part in domain 80 Yu domain 90, herein This is repeated no more.

Ground is changed, division mode of the utility model to driving circuit 20 in above-mentioned two domain 80,90 can also be other Suitable situation, it is not limited to division described in above embodiment.

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

Since signal modulated signals MGND Integral synchronous of the touch display panel 10 when executing touch-sensing is modulated, In, driving circuit 20 is supplied to public electrode 101 and executes the display drive signals that image is shown, that is, common voltage, e.g., second After common voltage Vc2, modulated signal MGND modulation, driving public electrode 101 can be suitable for simultaneously and execute touch-sensing, from And while guaranteeing that touch display panel 10 executes normal picture display, it can further drive public electrode 101 to execute touching Sensing is touched, in addition, the signal-to-noise ratio of touch display unit 1 can also be improved, and then improves touch-sensing precision.

Please continue to refer to Figure 14, in the present embodiment, in the first period W1, due to a part of the driving circuit 20 It is in the domain 80 on the basis of by GND, a part is in the domain 90 on the basis of by MGND, accordingly, it is possible to have in domain 90 Current flowing backwards to domain 80 possibility, 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 driving circuit 20 further comprises the first power end 206 and second source end 207.Wherein, described First power end 206 is located in domain 90.The second source end 207 is connect with the power supply end 31 of the main control chip 3.Institute Main control chip 3 is stated by 31 output supply voltage of power supply end 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 driving signal (that is, 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 When GND (that is, first reference signal), the protection circuit 15 is corresponding to be closed first power end 206 and the second source Connection between end 207.

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

Optionally, the protection circuit 15 further comprises first capacitor Q1 and the second capacitor 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 capacitor Q2 connects Be connected to the cathode of the diode J1 and be loaded with modulated signal MGND modulation ground between.Wherein, the first capacitor Q1 with Diode J1 is arranged in domain 80, and the second capacitor Q2 is arranged in domain 90.

The protection circuit 15 not limits described in embodiment of above, e.g., please refers to Figure 16, Figure 16 is protection circuit The electrical block diagram of 15 another embodiment.For clear difference protection circuit 15 shown in figure 15, shown in Figure 16 Protection circuit is denoted as 15a.The protection capacitor 15a includes third active switch 151 and control unit 153.The third Active switch 151 includes control terminal K3, the first transmission end T5 and the second transmission end T6.The control of the third active switch 151 Hold K3 connection described control unit 153, the first transmission end T5 connection second source end 207, second transmission end T6 connection first power end 206.When the modulated signal MGND is driving signal, described control unit 153 controls institute The cut-off of third active switch 151 is stated, the protection circuit 15a is corresponding to disconnect first power end 206 and the second source Connection between end 207；When the modulated signal MGND is ground signalling GND, described control unit 153 controls the third Active switch 151 is connected, the protection circuit 15a is corresponding be closed first power end 206 and the second source end 207 it Between connection.The third active switch 151 for example thin film transistor (TFT), triode, metal oxide semiconductor field effect tube.

Further optionally, the protection circuit 15a further comprises first capacitor Q1 and the second capacitor Q2.Wherein, first Capacitor Q1 is connected between the first transmission end T5 and the equipment ground for being loaded with ground signalling GND, and the second capacitor 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 can also be by the power supply in driving circuit 20 Power supply or reference power source are modulated, to reach all signals progress Integral synchronous modulation to touch display panel 10, and simultaneously It is unrestricted to equipment to be modulated.For example, the modulated terminal M of the modulation circuit 21 is in addition to that can connect or connect as aforementioned first Except ground terminal 201 (when modulating ground), it can also connect or be used as aforementioned first power end 206 (when modulating power supply).When When connecting or being used 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 ground terminal 201, and also referred to as power supply end, the two are loaded Voltages keep constant.

In addition, driving circuit 20 generally includes other than first power end 206 is with first ground terminal 201 Reference power source end (not shown), when the first power end 206 is for loading the first supply voltage, the first ground terminal 201 for loading When second source voltage, the reference power source end for loading third power supply voltage, the height of the third power supply voltage between Between first supply voltage and the height of second source voltage, wherein first supply voltage and second source voltage Pressure difference keep constant, the pressure difference of first supply voltage and third power supply voltage is kept constant.The reference power source end It can be used as or connect the modulated terminal.That is, one of the power supply end, reference power source end and first ground 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, a constant voltage is loaded in the second period W2, the modulated terminal M, the driving circuit 20 provides second Gray scale voltage Vd2, to public electrode 101, drives the touch display surface to pixel electrode 103, the second common voltage Vc2 of offer Plate 10 executes image and shows；In the first period W1, the modulated terminal M load-modulate signal, driving circuit 20 provides the first grayscale Voltage Vd1, to public electrode 101, drives the touch display panel 10 to pixel electrode 103, the first common voltage Vc1 of offer While executing image display, further public electrode 101 is driven to execute self-capacitance touch-sensing.

In addition, can also be decreased or increased in the touch display unit 1 and electronic equipment 100 of aforementioned each embodiment certain Element or combinational circuit etc., for those of ordinary skill in the art, as long as passing through common knowledge, the prior art, simultaneously The protection scope of the application should all be fallen into conjunction with the technical solution that the technology contents of the application can be derived rationally.

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

In other embodiments, for the touch display unit 1 and electronic equipment 100 of aforementioned each embodiment, institute State driving circuit 20 except can be used by modulation ground or modulation power supply or modulation reference power source come Integral synchronous modulate touch All signals of display panel 10 are shown and the mode of touch-sensing to reach while drive touch display panel 10 to execute image Except, alternatively, when touch display unit 1, which is performed simultaneously image, to be shown with touch-sensing, can also be used non-modulation ground or The non-modulation techniques scheme of non-modulation power supply or non-modulated reference power supply etc. is driven, that is, electronic equipment 100 is working Shi Caiyong is using ground signalling GND as a domain 80 of voltage basis of reference.

Although embodiment has been described about specific configuration and operation sequence here, it should be appreciated that, it replaces The embodiment in generation can increase, omit or change element, operation etc..Therefore, embodiment disclosed herein is meant to be real It applies example rather than limits.

Claims

1. a kind of touch display unit, comprising:

Touch display panel, including

Multiple pixel electrodes；

Multi-strip scanning line；

Multiple data lines；

Multiple control switches, each control switch include coordination electrode, the first transmission electrode and the second transmission electrode, wherein institute It states coordination electrode to connect with the scan line, first transmission electrode is connect with the data line, second transmission electrode It is connect with the pixel electrode；With

Multiple public electrodes；With

Driving circuit, the control switch being connected to scan line, activation with scan line by providing the first scanning open signal, and The first gray scale voltage is provided to pixel electrode by data line and the control switch of activation, and identical first common electrical is provided It presses to the multiple public electrode, the touch display panel is driven to be performed simultaneously image display refreshing and touch-sensing；

Wherein, the first scanning open signal, the first gray scale voltage, the first common voltage are through the same step of a modulated signal Signal after system, the driving circuit are driven described more by providing first common voltage to the multiple public electrode While a public electrode executes image display, further public electrode is driven to execute touch-sensing.

2. touch display unit according to claim 1, it is characterised in that: the relatively described modulation of the first common voltage Signal remains unchanged.

3. touch display unit according to claim 1, it is characterised in that: swept when the driving circuit provides described first When retouching open signal to scan line, drive part public electrode executes touch-sensing.

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

5. touch display unit described in any one of -4 according to claim 1, it is characterised in that: when the driving circuit drives When moving the touch display panel and being performed simultaneously image display and refresh with touch-sensing, the signal on the touch display panel is equal For the signal after the modulated signal synchronous modulation.

6. touch display unit according to claim 5, it is characterised in that: the driving circuit includes modulation circuit and One ground terminal, the modulation circuit is for generating the modulated signal, when the modulation circuit exports the modulated signal to institute When stating the first ground terminal, the signal on the touch display panel is the signal after the modulated signal synchronous modulation.

7. touch display unit according to claim 6, it is characterised in that: the driving circuit is by controlling the modulation Modulated signal described in circuit output gives the first ground terminal, utilizes the institute of touch display panel described in the modulated signal synchronous modulation There is signal, and execute self-capacitance touch-sensing using first common voltage driving public electrode, to drive described touch to show Show that panel is performed simultaneously image display refreshing and touch-sensing.

8. touch display unit according to claim 6, it is characterised in that: the driving circuit provides identical simultaneously One common voltage gives the multiple public electrode, and timesharing receives the touch-sensing letter exported from the multiple public electrode Number, to obtain touch information, wherein the driving circuit driving public electrode executes the first common voltage of touch-sensing simultaneously As display drive signals and touch driving signal.

9. touch display unit according to claim 8, it is characterised in that: the driving circuit includes touching driving electricity Road, public voltage generating circuit and data selection circuit；The touch driving circuit by the data selection circuit with it is described Multiple public electrode alternative connections, the public voltage generating circuit pass through the data selection circuit and the multiple public affairs The connection of common electrode alternative；Wherein, the public voltage generating circuit is for driving the multiple public electrode to execute image It has been shown that, the touch driving circuit are shown and self-capacitance touch-sensing for driving the multiple public electrode to execute image.

10. touch display unit according to claim 9, it is characterised in that: when the driving circuit drives the touch Display panel is performed simultaneously image display when refreshing with self-capacitance touch-sensing, the multiple public electrode receive described the One common voltage is respectively from the public voltage generating circuit and the touch driving circuit.

11. touch display unit according to claim 9, it is characterised in that: the public voltage generating circuit includes:

First amplifier, including third power end, third ground terminal, the first in-phase end, the first reverse side and the first output end, Wherein, the third power end is used for loading power voltage, and the third ground terminal connect with first ground terminal, and described the One in-phase end connects the output end of the signal source, and first reverse side is connect with first output end, and described first is defeated Outlet is used to connect by data selection circuit with public electrode alternative；With

Electric capacity of voltage regulation, including opposite the first pole plate and the second pole plate, wherein the first pole plate is connected to data selection circuit and Between one output end, the second pole plate is connected to first ground terminal.

12. touch display unit according to claim 11, it is characterised in that: the touch driving circuit includes:

The signal source；With

Multiple operational amplifiers, each operational amplifier include the second amplifier and feedback branch；Every one second amplifier includes 4th power end, the 4th ground terminal, the second in-phase end, the second reverse side and second output terminal, wherein the 4th power end For loading power voltage, the 4th ground terminal is connect with first ground terminal, and second in-phase end connects the letter The output end in number source, second reverse side are connect by feedback branch with the second output terminal, second reverse side into One step is connect by data selection circuit with public electrode alternative.

13. touch display unit according to claim 12, it is characterised in that: the driving circuit further comprises signal Processing circuit, the second output terminal further connect the signal processing circuit, and the signal processing circuit is come for receiving From the touch-sensing signal for touching driving circuit output, to obtain touch information.

14. touch display unit according to claim 10, it is characterised in that: the multiple pixel electrode with it is the multiple Public electrode is in two-dimensional array arrangement, when the driving circuit drives the touch display panel to be performed simultaneously image display brush When newly with self-capacitance touch-sensing, in synchronization, pixel electrode and the execution of the public electrode institute face of touch-sensing are executed Interval multirow is in the pixel electrode that image shows hold mode between the pixel electrode that image display refreshes.

15. touch display unit according to claim 1, it is characterised in that: the driving circuit is further used for passing through Second scanning open signal is provided and activates the control switch being connected with scan line to scan line, and passes through data line and activation Control switch provide the second gray scale voltage to pixel electrode, and provide the second common voltage to public electrode, to drive touching Display panel is touched to execute image display refreshing rather than be performed simultaneously touch-sensing.

16. touch display unit according to claim 15, it is characterised in that: the second scanning open signal is described For first scanning open signal through the modulated signal of the modulated signal, first common voltage is second common voltage Through the modulated signal of the modulated signal.

17. touch display unit according to claim 6, it is characterised in that: definition executes there are public electrode and touches sense The period of survey be the first period, define the multiple public electrode be performed both by image show rather than be performed simultaneously touch-sensing when Section was the second period, and first period and second period are alternately；The driving circuit is exported to described touch and is shown Showing the signal on panel is using the signal on first ground terminal as voltage basis of reference；In the first period, the modulation Modulated signal described in circuit output gives the first ground terminal；In the second period, the modulation circuit exports ground signalling and connects to first Ground terminal.

18. touch display unit according to claim 12, it is characterised in that: when the driving circuit drives the touch When display panel is performed simultaneously image display refreshing with touch-sensing, the output end of the signal source exports and described first is public Identical first reference voltage signal of voltage gives the first in-phase end and the second in-phase end.

19. a kind of electronic equipment, including touch display unit described in any one of claim 1-18.