CN207817658U

CN207817658U - Touch display unit and electronic equipment

Info

Publication number: CN207817658U
Application number: CN201690000422.1U
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: 2018-09-04
Anticipated expiration: 2026-09-30
Also published as: WO2018058650A1

Abstract

A kind of touch display unit and electronic equipment.Touch display unit includes touch display panel and driving circuit.Touch display panel includes multiple public electrodes.Driving circuit includes the first ground terminal；Public voltage generating circuit (22) is shown for driving the multiple public electrode to execute image；Driving circuit (23) is touched, for driving the multiple public electrode execution image to show and touch-sensing；Modulation circuit (21) for generating a modulated signal, and exports modulated signal to the first ground terminal.When modulation circuit (21) exports modulated signal to the first ground terminal, the signal on touch display panel is the modulated signal of modulated signal.Public voltage generating circuit (22) exports the first common voltage and is shown to corresponding public electrode execution image.It touches driving circuit (23) and export and touch drive signal and shown and touch-sensing to corresponding public electrode execution image.It is identical signal to touch drive signal and the first common voltage.The electronic equipment includes the touch display unit.

Description

Touch display unit and electronic equipment

Technical field

The present invention relates to touch display technology field more particularly to a kind of touch display unit and shown with described touch The electronic equipment of showing device.

Background technology

In general, touch display unit includes external hanging type, On-Cell (box mo(u)ld top half), In-Cell (box inner mold is embedded) three The touch display panel of type.With the development of technology, it in order to further such that touch display panel is thinning, and improves and touches The brightness of display panel is touched, the touch display panel of In-Cell types 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 data line and the transistor of activation, and provide 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 using gap of being expert to touch-sensing electrode.Usually, In order to coordinate execution touch-sensing, ensure the duration of touch-sensing, in the ranks the time of gap be generally extended.The touch-sensing electricity Pole is, for example, to be multiplexed public electrode.When public electrode multiplexing as touch-sensing electrode when, the driving circuit usually provide with The different touch drive 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 drive signal is with pre- relative to the ground signalling GND The periodically variable square-wave pulse signal for determining frequency, 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, to which reduction image shows and touches sense to a certain extent 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, display refreshing frequency generally to use 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 apparent not enough due to cause touch-sensing that cannot fully carry out the problem of.When refreshing frequency carries When up to 120HZ, it can be used for the time of touch-sensing with regard to less.

Invention content

The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention needs offer one Kind touch display unit and electronic equipment.

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

Touch display panel, including multiple public electrodes；With

Driving circuit, including：

First ground terminal；

Public voltage generating circuit is connect with the first ground terminal, aobvious for driving the multiple public electrode to execute image Show；

Touch driving circuit, connect with the first ground terminal, for drive the multiple public electrode execute image show and Touch-sensing；With

Modulation circuit is connect with the first ground terminal, for generating a modulated signal, and exports the modulated signal to described First ground terminal；

When the modulation circuit exports the modulated signal to first ground terminal, on the touch display panel Signal is through the modulated signal of the modulated signal, wherein the public voltage generating circuit exports the first common voltage Image is executed to corresponding public electrode to show, the touch driving circuit, which exports, touches drive signal to corresponding public electrode Execution image is shown and touch-sensing, and the touch drive signal is identical signal with first common voltage, and is Through the modulated signal of the modulated signal.

Optionally, the touch driving circuit is felt for driving same public electrode to be performed simultaneously image and show with touch It surveys.

Optionally, the touch driving circuit drives the multiple public electrode to execute self-capacitance and touches sense for timesharing It surveys.

Optionally, it is shown to part public electrode execution image when the touch driving circuit provides the touch drive signal When showing with touch-sensing, the public voltage generating circuit provides first common voltage and gives remaining all or part of common electrical Pole executes image and shows.

Optionally, the driving circuit further comprises data selection circuit, the data selection circuit with it is the multiple Public electrode is separately connected, and the public voltage generating circuit can by the data selection circuit and the multiple public electrode Selectivity connection, the touch driving circuit are connected by the data selection circuit and the multiple public electrode alternative It connects.

Optionally, it when the touch driving circuit is electrically connected by the data selection circuit with part public electrode, drives When the dynamic part public electrode execution image is shown with self-capacitance touch-sensing, the public voltage generating circuit passes through described Data selection circuit is electrically connected with remaining all or part of public electrode, remaining all or part of public electrode is driven to execute image Display.

Optionally, the data selection circuit includes the first data selector and multiple second data selectors, wherein institute Public voltage generating circuit is stated to connect with the multiple public electrode alternative by first data selector, it is described to touch It touches driving circuit to connect with the multiple public electrode alternative by the multiple second data selector, every 1 second number It is used for coupling part public electrode according to selector.

Optionally, first data selector includes multiple first output ports, and every 1 second data selector includes Multiple second output terminal mouths, each second output terminal mouth are separately connected a public electrode, first data selector it is each First output port is connected between second output terminal mouth and public electrode.

Optionally, multiple first output ports of first data selector and every 1 second data selector is multiple Second output terminal mouth connects one to one, alternatively, multiple first output ports of first data selector and the second data The part second output terminal mouth of selector is connected, alternatively, multiple first output ports of first data selector and portion Multiple second output terminal mouths of the second data selector are divided to connect one to one.

Optionally, the multiple public electrode is arranged in multiple lines and multiple rows, multiple second outputs of one second data selector Port is separately connected same row or the public electrode with a line.

Optionally, the multiple public electrode in multiple lines and multiple rows arrange, the quantity of the multiple second data selector with The columns of the multiple public electrode is identical, multiple second output terminal mouths of every 1 second data selector with it is the multiple public The line number of electrode is identical, and multiple second output terminal mouths of every 1 second data selector are corresponded with a row public electrode respectively Connection, or, the quantity of the multiple second data selector is identical as the line number of the multiple public electrode, every 1 second data Multiple second output terminal mouths of selector are identical as the columns of the multiple public electrode, every 1 second data selector it is multiple Second output terminal mouth connects one to one with a line public electrode respectively.

Optionally, the touch driving circuit shares same signal source, the signal with the public voltage generating circuit Source is connect with first ground terminal, described when the modulation circuit exports the modulated signal to first ground terminal Signal source corresponds to output through modulated first reference voltage signal of the modulated signal, and the public voltage generating circuit corresponds to The first common voltage identical with first reference voltage signal is provided to data selection circuit, the touch driving circuit pair Touch drive signal identical with first reference voltage signal should be provided to data selection circuit.

Optionally, the public voltage generating circuit includes：The signal source, including ground terminal and output end, it is described to connect Ground terminal is connect with first ground terminal；And follower, it is connect with first ground terminal, the follower passes through the data Selection circuit is connect with the multiple public electrode alternative, and the follower is used for transmission the letter that the signal source is exported Number give the data selection circuit.

Optionally, the touch driving circuit includes：

The signal source；With multiple operational amplifiers, it is connect with first ground terminal, each operational amplifier passes through The data selection circuit is connect with part public electrode alternative, and the operational amplifier is used for transmission the signal source institute The signal exported is stated to the data selection circuit, and touch-sensing signal of the transmission from public electrode.

Optionally, the public voltage generating circuit further comprises regulator circuit, be connected to first ground terminal with Between the follower, the signal for being exported to the follower carries out voltage stabilizing.

Optionally, the follower includes the first amplifier, and first amplifier includes 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 for loading power electricity Pressure, the third ground terminal are connect with first ground terminal, and first in-phase end connects the output end of the signal source, institute The first reverse side is stated to connect with first output end, first output end be used for by data selection circuit with it is the multiple Public electrode alternative connects.

Optionally, each operational amplifier includes the second amplifier and feedback branch；Second amplifier includes the 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 is used for Loading power voltage, the 4th ground terminal are connect with first ground terminal, and second in-phase end connects the signal source Output end, second reverse side connect by feedback branch with the second output terminal, and second reverse side is further It is connect with part public electrode alternative by data selection circuit.

Optionally, when the modulation circuit exports the modulated signal to first ground terminal, the signal source pair It should export through modulated first reference voltage signal of the modulated signal to first in-phase end and the second in-phase end, it is described Follower correspond to by the data selection circuit export the first common voltage identical with first reference voltage signal to Public electrode, the operational amplifier correspond to identical as first reference voltage signal by data selection circuit output Touch drive signal to public electrode, shown and touch-sensing with driving the touch display panel to be performed simultaneously image.

Optionally, the driving circuit further comprises signal processing circuit, the signal processing circuit connection described the Two output ends, the touch-sensing signal for receiving public electrode output, to obtain touch information.

Optionally, the signal source is DC source.

Optionally, the driving circuit further comprises the second ground terminal and voltage generation circuit, second ground terminal For being connect with the equipment of an electronic equipment, reception ground signalling, the voltage generation circuit is used to generate a drive signal, The modulation circuit is connected between second ground terminal and first ground terminal, according to the ground signalling and the drive Dynamic signal generates the modulated signal.

Optionally, the driving circuit export modulated signal to the first ground terminal by controlling the modulation circuit, Using all signals of touch display panel described in the modulated signal synchronous modulation, to drive the touch display panel simultaneously Execution image is shown and touch-sensing.

Optionally, the touch display panel further comprises multiple pixel electrodes；The driving circuit further comprises Data drive circuit is connect with first ground terminal；The data drive circuit is for driving the multiple pixel electrode to hold Row image is shown；When the modulation circuit exports the modulated signal to first ground terminal, the multiple pixel electrode On signal be through the modulated signal of the modulated signal.

Optionally, the touch display panel further comprises：Multi-strip scanning line；Multiple data lines a plurality of are swept with described Line insulation is retouched to intersect；With multiple transistor switches, each transistor switch includes coordination electrode, the first transmission electrode and second Transmission electrode, wherein coordination electrode connects scan line, and the first transmission electrode connects data line, and the second transmission electrode connects pixel Electrode；It is the multi-strip scanning line, described a plurality of when the modulation circuit exports the modulated signal to first ground terminal Signal on data line is through the modulated signal of the modulated signal.

Optionally, the driving circuit further comprises scan drive circuit, is connect with first ground terminal；

When the modulation circuit exports the modulated signal to first ground terminal：The scan drive circuit is used for The first scanning open signal is provided to corresponding scan line, activates the transistor switch being connected with scan line；The data are driven Dynamic circuit is used to provide the first gray scale voltage to corresponding pixel electrode by data line and the transistor switch of activation；The public affairs Common voltage generation circuit is for providing first common voltage to corresponding public electrode；The touch driving circuit is for carrying Corresponding public electrode is given for the touch drive signal；Wherein, the first scanning open signal, the first gray scale voltage, the One common voltage, the touch drive signal are through the modulated signal of the modulated signal.

Optionally, when the modulation circuit exports the modulated signal to first ground terminal, the driving circuit It drives the touch display panel to be performed simultaneously image to show and touch-sensing.

Optionally, when the modulation circuit exports the modulated signal to first ground terminal, the driving circuit The touch display panel is driven to be performed simultaneously image display refreshing and touch-sensing.

Optionally, the touch driving circuit provides identical signal to described simultaneously with the public voltage generating circuit Multiple public electrodes execute images and shows, wherein receive from touch the public electrode for touching drive signal of driving circuit into One step executes touch-sensing.

Optionally, the touch driving circuit is different from the circuit structure of the public voltage generating circuit.

The present invention also provides a kind of electronic equipment, the electronic equipment include it is any one of above-mentioned described in touch show Device.

Due to when the modulation circuit export the modulated signal to first ground terminal when, the touch display panel On signal be through the modulated signal of the modulated signal, and, touch driving circuit and public voltage generating circuit and export Identical signal is performed simultaneously image to the multiple public electrode and shows and touch-sensing, therefore, the touch display unit The executable touch-sensing in executing the arbitrary process that image is shown.Correspondingly, the electronics with the touch display unit The better user experience of equipment.

Description of the drawings

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

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

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

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

Fig. 5 is the electrical block diagram of the existing signal source for touching driving circuit.

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

Fig. 7 is the electrical block diagram of a specific implementation mode of electronic equipment shown in Fig. 1.

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

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

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

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

Figure 12 is the structure 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 electronic equipment of the present invention.

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

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

Specific implementation mode

To make the above purposes, features and advantages of the invention more obvious and understandable, below in conjunction with the accompanying drawings to the present invention Specific embodiment be described in detail.However, example embodiment can be implemented in a variety of forms, and it is understood not to limit In embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will be full and complete, and example is implemented The design of mode is comprehensively communicated to those skilled in the art.It is for convenience or clear, it may exaggerate, omit or schematically show Go out in the accompanying drawings shown in every layer thickness and size and the quantity for schematically illustrating related elements.In addition, the size of element The not exclusively quantity of reflection actual size and related elements not exclusively reflects actual quantity.Because of originals such as attached drawing are of different sizes Cause, in different drawings shown in same or similar or related elements quantity there is a situation where it is not consistent.The phase in figure Same reference numeral indicates same or similar structure.So, it should be noted that in order to enable label has regularity and patrols Property etc. is collected, in certain different embodiments, same or similar element or structure use different reference numerals, according to technology Relevance and related text explanation, those skilled in the art is can directly or indirectly to judge to learn.

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

Further, following term is exemplary, it is not intended that is limited in any way.Read the application it Afterwards, it would be recognized by those skilled in the art that the statement of these terms suitable for technology, method, physical component and system (no matter mesh It is preceding whether to know), including 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, and " a plurality of " includes two With two or more, " more " include two and two or more, and " multirow " includes two rows and two rows or more, " multiple row " include two row with More than two row, unless the application separately has clearly specific restriction.In addition, occur in each element title and signal name " the One ", the words such as " second ", " third ", " the 4th " are not the sequencing for limiting element or signal appearance, but for convenience of member Part is named, and each element is clearly distinguished so that description is more succinct understandable.Obscure in order to avoid understanding, needs further explanation in advance Have：

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 (being, for example, 0 volt), different voltage is provided to the second electrode of each pixel, to 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 is alternatively 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 starts to execute image display refreshing, after the gray scale voltage is written to second electrode, stopping 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 putting second electrode into line precharge or in advance 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 for image display refreshes, as when receiving common voltage, second electrode has first electrode The process of gray scale voltage write-in.

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

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

It should be noted that the specific call of first electrode, second electrode in different types of display device is not Together, for the display device for each suitable type for being applicable in the application, it is public electrode to unitedly call first electrode, unitedly calls the second electricity Extremely pixel electrode.Correspondingly, it is common voltage that the driving circuit, which is supplied to the display voltage signal of first electrode, 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 drive 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, and mutually electricity can be encouraged with AC signal (AC) waveform Appearance can be formed between the row and column of the touch pixel.When an object is close to the touch pixel, 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 waveforms being coupled in the touch pixel.Charged Couple AC waveforms This reduction can be detected and be measured by touch system to judge position of the object when touching the touch screen.

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

In the following, being illustrated to various embodiments of the present invention.

Also referring to Fig. 1 and Fig. 2, Fig. 1 is the structure schematic diagram of electronic equipment of the present invention.Fig. 2 is electronics shown in Fig. 1 The waveform diagram of one embodiment of the part signal of equipment.The electronic equipment 100 is as being portable electronic product, intelligence The product of the various suitable types such as household electric product and vehicle electronics product, the invention is not limited in this regard.It is described to take Formula electronic product is, for example, mobile phone, tablet computer, laptop, Wearable etc..The smart home electronic product example Such as it is desktop computer, refrigerator, washing machine, TV.The vehicle electronics product is, for example, navigator, vehicle-carrying DVD etc..It is described Electronic equipment 100 includes touch display unit 1.The touch display unit 1 is shown for realizing image and touch-sensing.It is described Touch display unit 1 is the touch display unit of In-Cell (box inner mold is embedded) type.In the touch display unit 1 Display device be, for example, liquid crystal display device.Correspondingly, the touch display unit 1 is touch liquid crystal display device.Below Mainly illustrated by taking touch liquid crystal display device as an example.So, ground, the display device in the touch display unit 1 are changed Or 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, for drive the multiple public electrode 101 execute image show, also use Touch-sensing is executed in driving the multiple public electrode 101.Preferably, the driving circuit 20 is for driving the multiple public affairs Common electrode 101 executes self-capacitance touch-sensing.So, the present invention is not limited thereto, and the driving circuit 20 can also be used to drive The multiple public electrode 101 executes the touch-sensing of other suitable types, and for example, mutual capacitance touch senses, as long as being based on Techniques disclosed in this application thought and other changes for doing or extension should all fall into the protection domain of the application.

The multiple public electrode 101 is for example arranged in two-dimensional array, and specifically, the multiple public electrode 101 is along 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 also can be in that Else Rule or non-regular are arranged, and the present invention is to this It is not limited.

The driving circuit 20 is used in driving the touch display panel 10 to execute 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 caused 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.

It is described to touch when the driving circuit 20, which drives touch display panel 10 to be performed simultaneously image, to be shown with touch-sensing It is through the modulated signals of modulated signal MGND to touch all electric signals on display panel 10.The touch display panel 10 On each electric signal for example increased with the raising of the modulated signal MGND, dropped with the reduction of the modulated signal MGND It is low.

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

It is described to touch when the driving circuit 20, which drives touch display panel 10 to be performed simultaneously image, to be shown with touch-sensing It touches the element on display panel 10 or is directly driven by the driving circuit 20, or driven indirectly by the 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 signals 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 capacitance Coupling is superimposed the modulated signal MGND.To which all electric signals on the touch display panel 10 are through the modulation The modulated signals of signal MGND.In addition to capacitive coupling, the element in the touch display panel 10 for example can also pass through resistance 20 driving indirectly of equal elements driven circuit.

So, ground is changed, in other embodiments, all electric signals on the touch display panel 10 also can 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 is executed 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 signals of modulated signal MGND.For example, the first common voltage Vc1 and the modulated signal MGND it Between pressure difference remain unchanged.The relatively described modulated signal MGND of first common voltage Vc1 are remained unchanged.So, ground is changed, The first common voltage Vc1 is alternatively the signal of the opposite variation of the pressure difference between the modulated signal Vc1.Preferably, institute Stating the first common voltage Vc1, relative to ground signal GND is the signal changed.The ground signalling GND is, for example, the perseverance of 0V (volt) Determining voltage signal, but be not limited to the constant voltage signal of 0V, or close to the constant voltage signal of 0V, the ground signalling 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, electronic equipment The cathode of 100 power supply, power supply is as being battery.The ground signalling GND is also known as system ground voltage, systematically believes Number, equipment ground voltage or equipment earth signal etc..In general, the equipment not earth ground or absolutely greatly.So, work as electronics May also be the equipment earth ground when 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 as display drive signals and touch Drive signal；When driving circuit 20, which drives the public electrode 101 to execute image, to be shown rather than be performed simultaneously touch-sensing, carry The first common voltage 101 for supplying the public electrode 101 is non-concurrent as touch drive signal as display drive signals.

The driving circuit 20 can drive 101 timesharing of the multiple 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 touching drive signal simultaneously to the first common voltage Vc1 of the multiple public electrode 101；When the driving circuit 20 When 101 timesharing of the multiple public electrode being driven to execute touch-sensing, it is supplied to the first of the multiple public electrode 101 public Voltage Vc1 is not while as touch drive signal.Therefore, it can also claim driving circuit 20 that public electrode 101 is driven to execute First common voltage Vc1 of touch-sensing is to touch drive signal.

When 20 timesharing of the 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 is driven in the driving circuit 20 Dynamic public electrode 101 is performed simultaneously image and show that executing image with driving public electrode 101 with the circuit structure of touch-sensing 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 modulations Signal, therefore, it is modulated in all electric signals after display drive signals can drive the touch display panel 10 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 can influence the normal display of image.Further, even if can't contract if the display resolution of touch display unit 1 improves 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 modulations Afterwards, display pressure difference will not change, and image is normally shown, and it is through described to be supplied to the first common voltage Vc1 of public electrode 101 The modulated signals of modulated signal MGND, the first common voltage Vc1 are the signal changed relative to ground signalling GND, from And public electrode 101 can be driven to execute self-capacitance simultaneously during ensuring the normally display image of touch display panel 10 and touched 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 the modulated letter for carrying out driving circuit 20 and being provided 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, when display resolution is 2K, 2K can be 1920x1080, so or the various suitable conditions such as 2560X1440.Similarly, when display resolution is 4K, 8K, also may be used It is that can be performed simultaneously tactile in the arbitrary process that image is shown for touch display unit 1 so including a variety of situations Sensing is touched, and touch-sensing does not influence normal image and shows.It is shown and oneself that is, touch display unit 1 can be performed simultaneously image Capacitance touch senses.

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 modulations, and it is modulated after First common voltage Vc1 can be used as display drive signals simultaneously and touch drive 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 in non-image display under the driving of the driving circuit 20 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 also can drive public electrode 101 together Execute self-capacitance touch-sensing.At this point, the state that the touch display panel 10 is entirely kept in image display, due to using The modulated signal MGND synchronizes modulation to the signal that driving circuit 20 is exported to touch display panel 10, therefore, executes Touch-sensing can't change the display pressure difference between two electrodes 101,103 of pixel 11 (see Fig. 7), correspondingly, touch The image of display panel 10 shows preferable with the quality of touch-sensing.

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

In the present embodiment, the driving circuit 20 drives the multiple public electrode 101 to execute image and shows simultaneously, 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 touch simultaneously every time Sensing completes a touch-sensing to all public public electrodes 101 by successively repeatedly driving.So, ground, institute are changed Stating driving circuit 20 also can 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, it is that timesharing drives the multiple common electrical to define the driving circuit 20 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 The execution image of a public electrode 101 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 the driving circuit, such as Can be：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 with 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 drives a line 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 and show and touch-sensing line by line, also can once together When driving multirow public electrode 101 execute image and show and touch-sensing.

Feel since 20 timesharing of the driving circuit (e.g., by row or line by line) driving public electrode 101 executes self-capacitance and touches 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 To execute the output pin of chip of 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, also can 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 also not can execute touch-sensing by row driving public electrode 101, for example, Touch-sensing is executed by row driving public electrode 101 or drives public electrode 101 to execute touch by irregular type of drive 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： 20 each driving public electrodes 101 of the driving circuit are continuous continual between executing 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 type of drive.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 being combined to the multiple common electrical It is also possible that pole 101 executes touch-sensing.

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

In particular, self-capacitance is executed for the multiple public electrode 101 of 20 intermittent drive of the driving circuit to touch The mode of sensing, it is the first period W1 to define there are the period of the execution touch-sensing of public electrode 101, 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 modulations 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 images are shown and self-capacitance touch-sensing.

For the ease of carrying out understanding differentiation with the signal of the second following period W2, the 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 1 second period W2, driving circuit 20 exports second signal and is shown to the execution image of touch display panel 10.

Preferably, in the second period W2, the driving circuit 20 does not utilize modulated signal MGND synchronous modulations institute State the signal of touch display panel 10.Correspondingly, first signal is, for example, the second signal through the modulated signal The modulated signals 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 the 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 is alternatively the voltage signal of other sizes.The modulated signal MGND is, for example, to change between 0 volt to 1.8 volts Signal.So, the present invention is not limited thereto, and the signals such as the modulated signal MGND, described second common voltage Vc2 are alternatively The signal of other suitable types, has related description below.

Since in the second period W2, the driving circuit 20 is not touched using described in the modulated signal MGND synchronous modulations The signal of display panel 10 is touched, for example, driven using existing display type of drive, 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 Mode, the touch display unit 1 not only can perform self-capacitance touch-sensing in executing the arbitrary process that image is shown, also may be used It avoids causing power consumption larger due to using modulation scheme 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, alternatively, the number that drives a part of public electrode 101 to execute touch-sensing of the driving circuit 20 is identical, driving is 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 noted that：The duration setting of second period W2, which need to touch 1 whole detection of the touch display unit, grasps 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 also can be not fully identical or different each other, and the duration of each second period W2 also can be not fully identical Or it is different each other.In addition, for different types of touch display unit 1, for the different touch display unit 1 of size, right Difference can be also corresponded in the first period W1, the second period W2 of the different touch display unit 1 of material.Further, for institute It states touch display unit 1 and is operated in different states, for example, blank screen standby mode and bright screen image dispaly state, described first Period W1, the second period W2 duration setting also can be different, to reduce power consumption.

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

Mainly the multiple public electrode 101 is driven to execute touch-sensing with 20 intermittence of driving circuit and timesharing below Mode illustrates touch display unit 1 and its operation principle.

Referring to Fig. 3, Fig. 3 is the electrical block diagram of a specific implementation mode 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, controls 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 Circuit 24 is alternative to connect corresponding public electrode 101.

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

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

For the data selection circuit 24 under the control of the control circuit 25, corresponding selection exports the common voltage production 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：

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

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

Third：The voltage of 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；

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

5th：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 It is the square-wave pulse signal that the first reference signal is alternately present with the second reference signal to state modulated signal.

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

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

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 receives the second reference signal that the ground signalling GND of the equipment ground is generated with the voltage generation circuit 22, 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 letters of modulated signal MGND Number.

It is modulation ground to be defined on the first period W1 and be applied with the ground of modulated signal MGND, and 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 accurate domain 90 is used for load-modulate signal MGND.Further, for being with modulation the circuit on ground, The modulated signal MGND that its ground reference by modulation loads；For being the circuit on ground, ground reference with equipment The ground signalling GND by equipment loaded.

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

Relatively, in the second period W2, the electronic equipment 100 is using a domain as voltage reference, with ground connection Signal GND is voltage reference.The ground of circuit in the electronic equipment 100 with being all connected with equipment, receives ground signalling GND.That is, in the second period W2, the modulation ground is corresponding with 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 touches 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 for the signal processing circuit 26 is located in domain 80, and a part is located in domain 90.

The modulation circuit 21 includes modulated terminal M.The modulation circuit 21 exports the modulation by the modulated terminal M to be believed Number MGND is given to the ground terminal of each circuit in domain 90, to using modulated signal MGND as in the domain 90 of voltage basis of reference The modulated signals of circuit output modulated signal MGND give the touch display panel 10.Wherein, the modulated terminal M connections are 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 signals of MGND.

Circuit in domain 90, for example, the public voltage generating circuit 22, touch driving circuit 23, data selection electricity Partial circuit in road 24, control circuit 25, 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 It is using ground signalling GND as Voltage Reference to select circuit 24, control circuit 25, signal processing circuit 26, voltage generation circuit 27 Benchmark.

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

The touch driving circuit 23 is exported with the public voltage generating circuit 22 to the multiple public electrode 101 First common voltage Vc1 is through the modulated identical signals of the modulated signal MGND, and the touch driving circuit 23 can The touch-sensing signal sensed from public electrode 101 is further transmitted to signal processing circuit 26, letter is touched to obtain Breath, therefore, the driving circuit 20 can drive the touch display panel 10 to be performed simultaneously image and show and self-capacitance touch Sensing.

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

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

Preferably, in the second period W2, the data selection circuit 24 is controlled by the control circuit 25, 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 Such as the second common voltage Vc2 can be further exported to data selection circuit 24, but the selection output of data selection circuit 24 comes from Second common voltage Vc2 of the public voltage generating circuit 22 to public electrode 101, to so that the touchs display fills 1 is set to show and non-executing touch-sensing in the second period W2 execution image.

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, to even if institute It states and touches driving circuit 23 and be supplied to the signal of public electrode 101 identical with the public voltage generating circuit 22, 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 is received, but based on the circuit structure of of public voltage generating circuit 22 itself, regardless of public electrode Whether 101 tops have target object to touch or approach, what the public electrode 101 being electrically connected with public voltage generating circuit 22 exported Signal is basically unchanged, to obtain touch information.

Preferably, the public voltage generating circuit 22 shares same signal source 221, institute with the touch driving circuit 23 Signal source 221 is stated to be modulated by the modulated signal MGND, it is corresponding to generate one first reference voltage signal.The common voltage production Raw circuit 22 exports identical first common electrical with the touch driving circuit 23 according to first reference voltage signal is corresponding 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, and figure is performed simultaneously 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 shadow The public electrode 101 of sound execution self-capacitance touch-sensing executes normal image and shows.In addition, since the common voltage generates Circuit 22 and the touch driving circuit 23 share same signal source 221, therefore, the public voltage generating circuit 22 with it is described Touch driving circuit 23 output to the multiple public electrode 101 signal can reach it is identical or essentially identical, so that it is guaranteed that touch Touch the quality that sensing is shown with image.

In some specific embodiments, the public voltage generating circuit 22 is for example including signal source 221, follower 222 and 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 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 present invention is not limited this, institute State signal source 221 or other suitable circuit structures.

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

The 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 voltage stabilizing.In the present embodiment, the 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 corresponded to exports 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 to execute by the data selection circuit 24 Image is shown.

The ground signalling GND, the signal are received in the second period W2, the ground terminal a and third ground terminal d1 Source 221 is corresponded to exports the second reference voltage signal to first amplifier 222, first amplification by the output end b Device 222 is in empty short status, then corresponding to transmit second common voltage Vc2 identical with second reference voltage signal to described Data selection circuit 24, and be supplied to the multiple public electrode 101 to execute image by the data selection circuit 24 and show.

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 for adding Carry supply voltage VDD2.The 4th ground terminal d2 is for connecting modulation ground.The second in-phase end e2 is used for and the signal The output end b connections in source 221.The second reverse side f2 is connect with the data selection circuit 24, and is further passed through described Feedback branch 233 is connect with the second output terminal g2.The second output terminal g2 further with the signal processing circuit 26 Connection.

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, the modulated signal MGND is received in the first period W1, the 4th ground terminal d2.Second amplification Device 232 is in empty short status, receives the first reference voltage signal from the signal source 221, and corresponding output described first Common voltage Vc1 gives the data selection circuit 24, and corresponding public electrode is supplied to by the data selection circuit 24 101.The feedback branch 233 is used 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 analysis calculating, can back-modulation 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 corresponds to the public electrode 101 that one row of connection may be selected by the data selection circuit 24.So, the multiple The number of operational amplifier 231 also can be identical as the line number of the multiple public electrode 101.In addition, the present invention not as Limit, for example, the public electrode 101 of each row also can corresponding selection connect two operational amplifiers 231 etc. embodiment be also can With.

The touch driving circuit 23 of the present invention provides the first common voltage Vc1 phases generated with public voltage generating circuit 22 Same touch drive signal is to public electrode 101, to which the touch drive signal can drive public electrode 101 both to execute Image shows and executes self-capacitance touch-sensing, and therefore, the multiple public electrode 101 of the touch display unit 1 is being held While row image is shown, touch-sensing can be further executed.

Further, distinguish each letter compared to the touch driving circuit 23 and the public voltage generating circuit 22 Number source, since the touch driving circuit 23 and the public voltage generating circuit 22 of the application 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 output of the data selection circuit 24 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, also it can be arranged first 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 are in closed state, the second period W2 with second switch, and the first switch, which is in, to be closed, described Second switch be in 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, the selection of every 1 second data Device 242 is separately connected a row 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 to arrange in the matrix form that 26 rows 40 arrange, 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 includes First output port O1, for exporting the signal from the public voltage generating circuit 22 to corresponding public electrode 101.Institute The quantity for stating the first output port O1 is identical as the line number of the multiple public electrode 101, as 26.Every 1 second data are selected It includes second output terminal mouth O2 to select device 242, for exporting from the signal for touching driving circuit 23 to corresponding common electrical Pole 101.The quantity of the second output terminal mouth O2 is identical as the line number of the multiple public electrode 101, as 26.It needs It is bright, in fig. 2, it is limited to the size of diagram, part circuit structure is actually only shown, for example, only showing 2 operation amplifiers 231,2 the second data selectors 242 of device and part public electrode 101.

In the present embodiment, the second output terminal mouth O2 of every 1 second data selector 242 is separately connected a common electrical Pole 101.Every 1 first output port O1 be respectively connected to a second output terminal mouth O2 of each second data selector 242 with it is public Between electrode 101, to save the quantity of connecting line L, the first different output port O1 connects different second each other Output port O2.

So, with changing, in other embodiments, the quantity of first data selector 241 is alternatively multiple, and It is not limited to one, correspondingly, the first output port O1 of the multiple first data selector 241 is counted with the multiple second Adjustment can be corresponded to according to the connection relation between the second output terminal mouth O2 of selector 242, for example, every 1 first data selector 241 are connected with the second data selector of part 242, so, or, the first output end of every 1 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 1 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 data that first data selector 241 selects 25 under the control of control circuit 25 for 26 Selector, when the multiple second data selector 242 export the first common voltage Vc1 give with a line public electrode 101 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 to be completed in one or more first periods W1.

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 or other suitable circuit structures.For example, the data selection circuit 24 is not limited to the choosing of the first data Select device 241 and the second data selector 242 or 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 or image are shown with touch-sensing in lasting progress, example Such as, in time, the public voltage generating circuit 22 persistently provides first common 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 control circuit 25 corresponds to control 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 also only the multiple public electrode 101 persistently can 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 can for example 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 also can drive part public electrode 101 simultaneously It executes fingerprint sensing to show with image, 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, can be with Circuit including other suitable types or proper function, corresponding driving public electrode 101 execute 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 It includes the first active switch 211, the second active switch 213 and control unit 215 to state modulation circuit 21.Wherein, it first active opens It includes control terminal K1, the first transmission end T1 and the second transmission end T2 to close 211, 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 that driving is believed 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, modulation ground is given for exporting the modulated signal MGND for receiving ground signalling GND, the node N.

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

The operation principle of the modulation circuit 21 is：In the first period W1, described control unit 215 is 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；It is described in the second period W2 Control unit 215 export ground signalling GND for controlling the modulation circuit 21 and gives modulation ground, becomes and equipment to modulation at this time Ground is identical.

It should be further noted that in the first period W1, there are one be with ground signalling GND for the electronic equipment 100 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 so that signal-to-noise ratio is improved, and the driving circuit 23 that touches is in certain in domain 90 A little circuit structures correspondingly can be also simplified, and then can also simplify circuit structure, save product cost.For example, to touch It is said for the signal source 221 of driving circuit 23 and the existing signal source 221a (seeing below Fig. 5) for touching driving circuit It is bright.

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 the signal source 221 for touching 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 is connected in series in power end P1 with equipment GND with resistance Ra 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 Drive 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 current source Ib and resistance Rb, and the current source Ib and resistance Rb is connected in series with Between power end P2 and ground for load-modulate signal MGND.Touch the receiving terminal 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 drive signal that generates is to the second in-phase end g2.In addition, also can be in such as modulation between power end P2 Increase capacitance, to keep the stability of signal.

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

Also referring to Fig. 2, Fig. 3 and Fig. 7, Fig. 7 is the circuit knot of a specific implementation mode 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 domain of the application.In this embodiment party In formula, the touch display panel 10 of the touch display unit 1 includes multiple pixels 11.Each pixel 11 is in the driving It is shown and touch-sensing under the driving of circuit 20 for executing image.Each pixel 11 includes the public electrode 101, pixel Electrode 103 and switch unit 104.In the present embodiment, the switch unit 104 includes control switch 105.The control Switch 105 includes coordination electrode G, the first transmission electrode S and the second transmission electrode D.The coordination electrode G and described first is passed Transmission pole S is connect with the driving circuit 20.The second transmission electrode D is connect with the pixel electrode 103.The driving electricity Road 20 is for driving the conducting of control switch 105 and cut-off.In the present embodiment, the switch unit 104 includes a control Switch 105 is made, so, in other embodiments, the switch unit 104 may also comprise two control switches 105 or more control System switch, so, can also further comprise other circuit elements, such as storage circuit etc..The two control switch 105 is, for example, to go here and there Connection connection.

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 present invention is not limited thereto, the control switch 105 or other suitable types Switch.When it is thin film transistor switch to control switch 105, coordination electrode G is the grid of thin film transistor switch, and first passes Transmission pole S is the source electrode of thin film transistor switch, and the second transmission electrode D is the drain electrode of thin film transistor switch.

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

In the first period W1, the driving circuit 20 gives control switch 105 by providing the first scanning open signal Vg1, It drives the control switch 105 to be connected, and the first gray scale voltage Vd1 is provided 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 modulations 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 is logical Cross the control switch 105 for providing the first scanning pick-off signal Vg2 to the pixel 11 of remaining row so that the pixel of remaining row The control switch 105 of point 11 ends, to so that the pixel 11 of remaining row is in image and shows hold mode.Wherein, The first scanning pick-off signal Vg2 is through the modulated signals of modulated signal MGND.

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

To avoid 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, to realize that the pixel 11 for executing touch-sensing is shown with image is executed 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 Also selectable portion is overlapped between the pixel 11 of sensing, between the case where partly overlapping 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 is opened to control 105 are closed, activation controls switch 105, and provides the second gray scale voltage Vd2 to pixel electrode by the control switch 105 of activation 103, the second common voltage Vc2 is provided and executes image display refreshing to public electrode 101.When the driving circuit 20 drive it is a certain When capable pixel 11 executes image display refreshing, controls of the second scanning pick-off signal Vg4 to the pixel 11 of remaining row is provided Switch 105 is made to end, to so that the pixel 11 of remaining row is in image and shows hold mode.

The first scanning open signal Vg1 is, for example, the second scanning open signal Vg3 through the modulated signal The modulated signals of MGND.The first scanning pick-off signal Vg2 is, for example, the second scanning pick-off signal Vg4 through the tune The modulated signals 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 signals 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：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 is, for example, the cross arrangement that insulate to retouch line 281 and the multiple data lines 291.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.Distinguish per scan line 281 Connect the coordination electrode G of the control switch 105 of one-row pixels point 11.Each data line 291 is separately connected a row pixel 11 Control the first transmission electrode S of switch.

The multi-strip scanning line 281 is used for transmission the first scanning open signal Vg1 from the driving circuit 20, second Scan the control of open signal Vg3, the first scanning pick-off signal Vg2 or the second scanning pick-off signal Vg4 to control switch 105 Electrode G.The multiple data lines 291 are used for transmission the first gray scale voltage Vd1 or the second grayscale from the driving circuit 20 First transmission electrode Ss 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 is provided to the data drive circuit 29.The generation circuit of scanning signals 28a is swept with described Retouch the connection of driving circuit 28.The generation circuit of scanning signals 28a is for generating the first scanning open signal Vg1, second Open signal Vg3, the first scanning pick-off signal Vg2 or the second scanning pick-off signal Vg4 are scanned, and first scanning is provided Open signal Vg1, the second scanning open signal Vg3, the first scanning pick-off signal Vg2 or the second scanning pick-off signal Vg4 are to institute State scan drive circuit 28.Such as circuit structure including shift register of the scan drive circuit 28 receives and carrys out self-scanning The scanning open signal and scanning pick-off signal of signal generating circuit 28a, and corresponding provide is swept under the control of control circuit 25 Open signal and scanning pick-off signal are retouched 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 The modulation of modulated signal MGND export the first scanning open signal Vg1, the first scanning pick-off signal Vg2 to described Scan drive circuit 28, corresponding output first scanning under the timing control of control circuit 25 of the scan drive circuit 28 Open signal Vg1, the first scanning pick-off signal Vg2 give corresponding scan line 281 respectively, the data drive circuit 29 by The modulation of the modulated signal MGND of the modulation circuit 21 exports the first gray scale voltage Vd1 to the multiple data lines 291, it is supplied to corresponding pixel electrode 103 to execute image display with the control switch 105 by activation and refreshes.The common electrical Generation circuit 22 and the touch driving circuit 23 is pressed to provide the first common voltage Vc1 to institute by the data selection circuit 24 State multiple public electrodes 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 Pole 103 becomes the signal after the modulated signal MGND synchronous modulations with the signal on public electrode 101.To described Driving circuit 20 can drive public affairs simultaneously in driving the touch display panel 10 to execute the arbitrary process that normal picture is shown Common electrode 101 executes touch-sensing.

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

Compared to the touch display unit for the Incell types that existing multiplexing public electrode executes touch-sensing, the application Touch display unit 1 by using the modulated signal MGND synchronous modulations touch display panel 10 all signals, to So that can be further used as touching drive 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 providing the first scanning open signal Vg1 to scan line 281 Capacitance touch senses, and 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, to have the time of execution touch-sensing not for the display device that display resolution improves Enough technical problems.In addition, the touch display unit 1 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 the driving circuit 20 to the multiple public electrode 101 All same, and, the first common voltage Vc1 is compared to the signal that ground signalling GND is variation, to can be used described the One common voltage Vc1 is further used as touching drive 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 outputs the second scanning open signal Vg3, The second scanning pick-off signal Vg4 gives the scan drive circuit 28, and the scan drive circuit 28 is in control circuit 25 Lower the second scanning open signal of the corresponding output 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 for the voltage signal and 0.8V that the first common voltage Vc1 is (- 1) V is defeated The signal gone out.

It should be noted that in the figure 7, only showing that modulation circuit 21 exports modulated signal MGND and gives touch driving circuit 23, modulation circuit 21 is omitted and exports modulated signal MGND to other circuits with ground terminal 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 It is to have to export modulated signal MGND to other circuits with ground terminal in domain 90 to state modulation circuit 21.

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

Also referring to Fig. 8 and Fig. 9, Fig. 8 is that the decomposition texture of an embodiment of touch display panel 10 shown in Fig. 7 shows It is intended to.Fig. 9 is the cross-sectional view of touch display panel 10 shown in Fig. 8.The touch display panel 10 includes the first base Plate 106, second substrate 107, display medium layer 108.The display medium layer 108 is that liquid crystal layer so can in this embodiment 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 on 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 Such as it is glass substrate, film substrate.

The second substrate 107 and the pixel electrode 103 being arranged on 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 coloured image is shown.The first substrate 106 and coloured silk Colo(u)r filter is often collectively referred to as colored filter (Color Filter, CF) substrate.The first substrate 106 is back to described The side of two substrates 107 shows and receives touch-sensing for image.So, ground is changed, the colored filter can also be put It sets on the second substrate 107.In some type of display device, the colored filter also can be omitted, alternative Ground is shone using the light source of three color of red, green, blue.In addition, for different types of display device, the second substrate 107 can also be used for image back to the side of the first substrate 106 shows and receives touch-sensing.The touch display panel 10 or be two-sided touch display panel.The present invention to touch display panel 10 be single side touch display panel or it is two-sided touch It touches display panel and is 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 at same layer, the multiple pixel electrode 103 is located at same layer, the two It is stacked.In addition, since the touch display unit 1 is by taking liquid crystal display device as an example, correspondingly, the liquid crystal display fills It is set to 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 with by stating on multiple pixel electrodes 103, 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 be set It sets between pixel electrode 103 and second substrate 107.Between the multiple public electrode 101 and the multiple pixel electrode 103 It is stacked.Slit 103a is respectively set on the multiple pixel electrode 103, to form edge electricity between public electrode 101 .In this embodiment, it can be not provided with slit on the multiple public electrode 101, is respectively whole piece electrode, so, changed Ground may also set up slit on the multiple public electrode 101, to improve edge electric field strength.

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

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

The main control chip 3 includes power supply end 31 and ground terminal 33.The power supply end 31 connects driving circuit 20, for powering for driving circuit 20.The connection equipment of the ground terminal 33, 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 It states display driver circuit 20a and the driving execution of touch display panel 10 is corresponded to according to the signal that the main control chip 3 is provided 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 drive 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 for example controls signal to control circuit 25 by offer, lead to 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 sequential 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 The circuits such as road 20a, touch driving circuit 23 are located in domain 90, therefore, are located at the main control chip 3 in domain 80 and are located in domain 90 Display driver circuit 20a, the signal transmission touched between the circuits such as driving circuit 23 need to for example be handled via level conversion, with full The pressure-resistant demand of sufficient electronic component.Relatively, in the second period W2, main control chip 3 and display driver circuit 20a, driving is touched If the signal transmission between the circuits such as circuit 23 need to be handled via level conversion, carry out level conversion processing, if without via Level conversion processing, 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 and turns It changes, and exports transformed digital signal to the computing unit 265.The computing unit 265 is counted 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 signal for indicating touch coordinate To main control chip 3.The main control chip 3 indicates that the signal of touch coordinate corresponds to control electronics 100 and executes phase according to described The function of answering.

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, Can be that multiple operational amplifiers 231 share a signal processing unit 261, and not correspond to difference for each operational amplifier 231 Connect a signal processing unit 261.

In addition, operational amplifier 231 with increase in signal processing unit 261 corresponding circuit module or clipped electricity Road module is also possible, or, also realizing identical function being equally using other circuit modules or circuit unit can be with 's.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 signals 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 transformed digital signal of output level 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 transformed digital signal 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 indicate the signal of touch coordinate into It after line level conversion, then exports to the main control chip 3, is also so possible, needs according to computing unit 265 and simulation- The pressure-resistant situation of digital signal converting unit 263 determines.

Please refer to Fig.1 the structural schematic diagram for the another embodiment that 4, Figure 14 is electronic equipment 100.The touch display surface Plate 10 can further comprise that earth element, the earth element are, for example, to be grounded L1.The ground wire L1 is for example arranged in institute It states around multiple pixels 11.So, the earth element is not limited to the ground wire L1.In addition, the turntable driving electricity Road 28 can for example be integrated on the touch display panel 10 (Gate In Panel, GIP), correspondingly, the earth element It can be the earth element in scan drive circuit 28.The ground wire L1 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 wire 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 can for example further comprise slope controller 204, the slope controller 204 and the tune Circuit 21 processed connects, the slope of the modulated signal for controlling the output of the modulation circuit 21, to reduce electromagnetic interference (EMI). In addition, the slope controller 204 is for example arranged in the domain 80 on the basis of by 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 respective handling (e.g., storage, solution to the display data from main control chip 3 Compression, color adjustment etc.).The setting of the level conversion unit 264 the display processing circuit 205 and control circuit 25 it Between, for carrying out level conversion to treated the display data of the display processing circuit 205, and output level is transformed aobvious 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 into gray scale voltage, and according to the sequential 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 is 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 When being not required to level conversion, then the signal between computing unit 265 and analog to digital signal conversion unit 263 can be without electricity 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 with the second period W2 to the corresponding signal of reply.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 is：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 is horizontal 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 Shen Record and circuit theory please is can to determine that level conversion unit 264 is located at the part in domain 80 and domain 90, right herein This is repeated no more.

Ground is changed, dividing mode of the present invention to driving circuit 20 in above-mentioned two domain 80,90 is alternatively other suitable The case where, it is not limited to the division described in the 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 that domain 80 is output to 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 to execute the display drive signals that image is shown, that is, common voltage, e.g., second Common voltage Vc2 after modulated signal MGND modulation, can be suitable for driving public electrode 101 and execute touch-sensing simultaneously, from And while ensureing that touch display panel 10 executes normal picture display, it can further drive public electrode 101 to execute touch Sensing 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 for 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 are to the possibility in domain 80, and in order to prevent this phenomenon, the electronic equipment 100 can further comprise protecting 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 the 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 drive signal (that is, second reference signal), the protection circuit 15 corresponds to 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, which corresponds to, is closed first power end 206 and the second source Connection between end 207.

Please refer to Fig.1 the electrical block diagram that 5, Figure 15 is the embodiment for protecting circuit 15.In present embodiment In, the protection circuit 15 includes diode J1.The anode connection second source end 207 of the diode J1, the diode The cathode of J1 connects the first power end 206.

Optionally, the protection circuit 15 further comprises the first capacitance Q1 and the second capacitance Q2.Wherein, first electricity Hold Q1 to be connected between the anode and the equipment ground for being loaded with ground signalling GND of the diode J1, the second capacitance Q2 connects It is connected between the cathode and the modulation ground for being loaded with modulated signal MGND of the diode J1.Wherein, the first capacitance Q1 with Diode J1 is arranged in domain 80, and the second capacitance Q2 is arranged in domain 90.

The protection circuit 15 not limits described in embodiment of above, and e.g., it is protection circuit 15 to please refer to Fig.1 6, Figure 16 Another embodiment electrical block diagram.For clear difference protection circuit 15 shown in figure 15, protected shown in Figure 16 Protection circuit is denoted as 15a.The protection capacitance 15a includes third active switch 151 and control unit 153.The third has Source switch 151 includes control terminal K3, the first transmission end T5 and the second transmission end T6.The control terminal of the third active switch 151 K3 connections described control unit 153, the first transmission end T5 connections second source end 207, the second transmission end T6 Connect first power end 206.When the modulated signal MGND is drive signal, described control unit 153 controls described Third active switch 151 ends, and the protection circuit 15a, which is corresponded to, disconnects first power end 206 and the second source end Connection between 207；When the modulated signal MGND is ground signalling GND, described control unit 153, which controls the third, to be had Source switch 151 is connected, and the protection circuit 15a, which is corresponded to, to be closed between first power end 206 and the second source end 207 Connection.The third active switch 151 is as being thin film transistor (TFT), triode, metal oxide semiconductor field effect tube.

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

Ground is changed, in other embodiments, the modulation circuit 21 also can be by the power supply in 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 be 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, other than first power end 206 and first ground terminal 201, driving circuit 20 generally includes 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 supply voltage, the height of the third 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 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 signals, 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 domain 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 modulate 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 be performed simultaneously image show with touch-sensing when, can also be used it is 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, including：

Touch display panel, including multiple public electrodes；With

Driving circuit, including：

First ground terminal；

Public voltage generating circuit is connect with first ground terminal, aobvious for driving the multiple public electrode to execute image Show；Driving circuit is touched, is connect with first ground terminal, shows and touches for driving the multiple public electrode to execute image Touch sensing；With

Modulation circuit is connect with first ground terminal, for generating a modulated signal, and exports the modulated signal to described First ground terminal；

When the modulation circuit exports the modulated signal to first ground terminal, the signal on the touch display panel It is through the modulated signal of the modulated signal, wherein the public voltage generating circuit exports the first common voltage to phase The public electrode answered executes image and shows, the touch driving circuit exports touch drive signal and executed to corresponding public electrode Image is shown and touch-sensing, and the touch drive signal is identical signal with first common voltage, and is through institute State the modulated signal of modulated signal.

2. touch display unit according to claim 1, it is characterised in that：The touch driving circuit is same for driving Public electrode is performed simultaneously image and shows and touch-sensing.

3. touch display unit according to claim 1, it is characterised in that：The touch driving circuit drives for timesharing The multiple public electrode executes self-capacitance touch-sensing.

4. touch display unit according to claim 1, it is characterised in that：When the touch driving circuit provides described touch When touching drive signal and executing image to part public electrode and show with touch-sensing, described in public voltage generating circuit offer First common voltage executes image to remaining all or part of public electrode and shows.

5. touch display unit according to claim 1, it is characterised in that：The driving circuit further comprises that data are selected Circuit is selected, the data selection circuit is separately connected with the multiple public electrode, and the public voltage generating circuit passes through institute It states data selection circuit to connect with the multiple public electrode alternative, the touch driving circuit is selected by the data Circuit is connect with the multiple public electrode alternative.

6. touch display unit according to claim 5, it is characterised in that：When the touch driving circuit passes through the number It is electrically connected with part public electrode according to selection circuit, drives the part public electrode to execute image and show to touch with self-capacitance and feel When survey, the public voltage generating circuit is electrically connected by the data selection circuit with remaining all or part of public electrode, It drives remaining all or part of public electrode to execute image to show.

7. touch display unit according to claim 5, it is characterised in that：The data selection circuit includes the first data Selector and multiple second data selectors, wherein the public voltage generating circuit by first data selector with The connection of the multiple public electrode alternative, the touch driving circuit by the multiple second data selector with it is described Multiple public electrode alternative connections, every 1 second data selector are used for coupling part public electrode.

8. touch display unit according to claim 7, it is characterised in that：First data selector includes multiple One output port, every 1 second data selector include multiple second output terminal mouths, and each second output terminal mouth is separately connected one Public electrode, every 1 first output port of first data selector be connected to second output terminal mouth and public electrode it Between.

9. touch display unit according to claim 8, it is characterised in that：Multiple the first of first data selector Multiple second output terminal mouths of output port and every 1 second data selector connect one to one, alternatively, first data Multiple first output ports of selector are connected with the part second output terminal mouth of the second data selector, alternatively, described Multiple first output ports of one data selector are corresponded with multiple second output terminal mouths of the second data selector of part Connection.

10. touch display unit according to claim 7, it is characterised in that：The multiple public electrode is in multiple lines and multiple rows Arrangement, multiple second output terminal mouths of one second data selector are separately connected same row or the public electrode with a line.

11. touch display unit according to claim 7, it is characterised in that：The multiple public electrode is in multiple lines and multiple rows Arrangement, the quantity of the multiple second data selector is identical as the columns of the multiple public electrode, the choosing of every 1 second data The multiple second output terminal mouths for selecting device are identical as the line number of the multiple public electrode, and multiple the of every 1 second data selector Two output ports connect one to one with a row public electrode respectively, or, the quantity of the multiple second data selector and institute The line number for stating multiple public electrodes is identical, multiple second output terminal mouths and the multiple common electrical of every 1 second data selector The columns of pole is identical, and multiple second output terminal mouths of every 1 second data selector are corresponded with a line public electrode respectively to be connected It connects.

12. touch display unit according to claim 5, it is characterised in that：The touch driving circuit with it is described public Voltage generation circuit shares same signal source, and the signal source is connect with first ground terminal, when the modulation circuit exports When the modulated signal gives first ground terminal, the signal source corresponds to output through modulated first ginseng of the modulated signal Voltage signal is examined, the public voltage generating circuit, which corresponds to, provides the first common electrical identical with first reference voltage signal It presses to data selection circuit, the touch driving circuit, which corresponds to, provides touch driving identical with first reference voltage signal Signal is to data selection circuit.

13. touch display unit according to claim 12, it is characterised in that：The public voltage generating circuit includes：

The signal source, including ground terminal and output end, the ground terminal are connect with first ground terminal；With

Follower is connect with first ground terminal, the follower by the data selection circuit with it is the multiple public Electrode alternative connects, and the follower is used for transmission signal that the signal source is exported to the data selection circuit.

14. touch display unit according to claim 13, it is characterised in that：The touch driving circuit includes：

The signal source；With

Multiple operational amplifiers are connect with first ground terminal, and each operational amplifier passes through the data selection circuit It is connect with part public electrode alternative, the operational amplifier is used for transmission the signal exported described in the signal source to institute State data selection circuit, and touch-sensing signal of the transmission from public electrode.

15. touch display unit according to claim 13, it is characterised in that：The public voltage generating circuit is further It including regulator circuit, is connected between first ground terminal and the follower, the signal for being exported to the follower Carry out voltage stabilizing.

16. touch display unit according to claim 14, it is characterised in that：The follower includes the first amplifier, First amplifier includes 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 by data selection circuit with the multiple public electrode alternative for being connect.

17. touch display unit according to claim 16, it is characterised in that：Each operational amplifier includes the second amplification Device and feedback branch；Second amplifier include the 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 is used for loading power voltage, the 4th ground terminal and first ground terminal Connection, second in-phase end connect the output end of the signal source, and second reverse side passes through feedback branch and described the Two output ends connect, and second reverse side is further connect by data selection circuit with part public electrode alternative.

18. touch display unit according to claim 17, it is characterised in that：When the modulation circuit exports the modulation When signal gives first ground terminal, the signal source corresponds to output and believes through modulated first reference voltage of the modulated signal Number give first in-phase end and the second in-phase end, the follower is corresponded to through data selection circuit output and described the Identical first common voltage of one reference voltage signal is selected to public electrode, the operational amplifier correspondence by the data Circuit output touch drive signal identical with first reference voltage signal is to public electrode, to drive the touch to show Panel is performed simultaneously image and shows and touch-sensing.

19. touch display unit according to claim 17, it is characterised in that：The driving circuit further comprises signal Processing circuit, the signal processing circuit connect the second output terminal, the touch-sensing letter for receiving public electrode output Number, to obtain touch information.

20. touch display unit according to claim 12, it is characterised in that：The signal source is DC source.

21. touch display unit according to claim 1, it is characterised in that：The driving circuit further comprises second Ground terminal and voltage generation circuit, second ground terminal with the equipment of an electronic equipment for connecting, reception ground signalling, The voltage generation circuit is connected to second ground terminal and described first for generating a drive signal, the modulation circuit Between ground terminal, the modulated signal is generated according to the ground signalling and the drive signal.

22. according to the touch display unit described in any one of claim 1-21, it is characterised in that：The driving circuit is logical Cross control the modulation circuit export the modulated signal give the first ground terminal, using described in the modulated signal synchronous modulation touch All signals for touching display panel are shown and touch-sensing to drive the touch display panel to be performed simultaneously image.

23. touch display unit according to claim 22, it is characterised in that：The touch display panel further comprises Multiple pixel electrodes；The driving circuit further comprises data drive circuit, is connect with first ground terminal；The data Driving circuit is shown for driving the multiple pixel electrode to execute image；When the modulation circuit export the modulated signal to When first ground terminal, the signal on the multiple pixel electrode is through the modulated signal of the modulated signal.

24. touch display unit according to claim 23, it is characterised in that：The touch display panel further wraps It includes：Multi-strip scanning line；

Multiple data lines are intersected with multi-strip scanning line insulation；With

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

It is the multi-strip scanning line, described a plurality of when the modulation circuit exports the modulated signal to first ground terminal Signal on data line is through the modulated signal of the modulated signal.

25. touch display unit according to claim 24, it is characterised in that：The driving circuit further comprises scanning Driving circuit is connect with first ground terminal；

When the modulation circuit exports the modulated signal to first ground terminal：

For providing the first scanning open signal to corresponding scan line, activation is connected the scan drive circuit with scan line Transistor switch；

The data drive circuit is used to provide the first gray scale voltage to corresponding by data line and the transistor switch of activation Pixel electrode；

The public voltage generating circuit is for providing first common voltage to corresponding public electrode；

The touch driving circuit is for providing the touch drive signal to corresponding public electrode；

Wherein, the first scanning open signal, the first gray scale voltage, the first common voltage, the touch drive signal are Through the modulated signal of the modulated signal.

26. touch display unit according to claim 1, it is characterised in that：When the modulation circuit exports the modulation When signal gives first ground terminal, the driving circuit drives the touch display panel to be performed simultaneously image and shows and touch Sensing.

27. touch display unit according to claim 1, it is characterised in that：When the modulation circuit exports the modulation When signal gives first ground terminal, the driving circuit drive the touch display panel be performed simultaneously image display refresh with Touch-sensing.

28. touch display unit according to claim 1, it is characterised in that：The touch driving circuit with it is described public Voltage generation circuit provides identical signal and is shown to the multiple public electrode execution image simultaneously, wherein receives from tactile The public electrode for touching the touch drive signal of driving circuit further executes touch-sensing.

29. touch display unit according to claim 1, it is characterised in that：The touch driving circuit with it is described public The circuit structure of voltage generation circuit is different.

30. the touch display unit described in any one of a kind of electronic equipment, including claim 1-29.