CN109920386A

CN109920386A - Touch display unit and electronic equipment

Info

Publication number: CN109920386A
Application number: CN201711322707.4A
Authority: CN
Inventors: 林峰
Original assignee: Shenzhen Deep Minimally Invasive Core Technology Co Ltd
Current assignee: Zhuhai Zhongke Ruibo Medical Technology Co., Ltd
Priority date: 2017-12-12
Filing date: 2017-12-12
Publication date: 2019-06-21

Abstract

The present invention provides a kind of touch display unit and electronic equipment.The touch display unit includes touch display panel and driving chip.The driving chip includes: modulation circuit, for generating a modulated signal；With touch driving circuit, for driving the touch display panel to execute touch-sensing.By being exported using driving chip described in the modulated signal synchronous modulation to the voltage signal of the touch display panel, driving the touch display panel to execute, image display is kept the driving chip or/and image is shown during refreshing, and the touch display panel is further driven to execute touch-sensing.The electronic equipment includes the touch display unit.

Description

Touch display unit and electronic equipment

Technical field

The present invention relates to touch and field of display technology more particularly to a kind of touch display units and electronic equipment.

Background technique

For the touch display unit that touch display unit, especially multiplexing public electrode execute touch-sensing, in order to subtract Interference between few touch-sensing and image display refreshing, the way that manufacturer generallys use is: control touch display panel timesharing It executes touch-sensing and image display refreshes.Such as, in a specific embodiment, the gap in the ranks shown in image or frame gap phase Between, drive the execution touch-sensing of touch display panel.

So, being gradually increased with the resolution ratio of the touch display panel, for example, point of the liquid crystal display panel of mobile phone Resolution all gradually adopts 2K (e.g., 2560x1440) resolution ratio, even higher resolution ratio, and display refreshing frequency generally uses 60HZ, the gap in the ranks, frame gap can be then significantly compressed, if again using gap of being only expert at, frame gap driving touch-sensing Electrode executes touch-sensing, then can because the time it is obvious not enough due to cause touch-sensing that cannot sufficiently carry out the problem of.It is aobvious when touching When the refreshing frequency of showing device is improved to 120HZ, it can be used for the time of touch-sensing with regard to less.

Summary of the invention

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 to provide one Kind can drive touch display panel to be performed simultaneously image and show and the touch display unit and electronic equipment of touch-sensing.

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

Touch display panel；With

Driving chip, comprising:

Modulation circuit, for generating a modulated signal；With

Driving circuit is touched, for driving the touch display panel to execute touch-sensing；

By being exported using driving chip described in the modulated signal synchronous modulation to the voltage of the touch display panel Signal, driving the touch display panel to execute, image display is kept the driving chip or/and image shows the mistake refreshed Cheng Zhong further drives the touch display panel to execute touch-sensing.

As by being exported using driving chip described in the modulated signal synchronous modulation to the touch display panel Voltage signal, driving the touch display panel to execute, image display is kept the driving chip or/and image display refreshes During, further drive the touch display panel to execute touch-sensing, therefore, touch-sensing is not limited in gap in the ranks Or frame gap, therefore, even if the resolution ratio when the touch display panel improves, when also will not influence needed for touch-sensing Between.To improve the usage experience of user.

In addition, the modulation circuit and touch driving circuit are all located in the same driving chip, rather than position respectively In two chips, so as to save the pin connected between chip and chip, reduce the volume of electronic equipment shared by chip, In addition, being also conducive to production management, production efficiency is improved, and then reduce production cost.

Optionally, the touch display panel includes multiple public electrodes, and the touch driving circuit is for providing touch Driving signal gives each public electrode, and receives the touch-sensing signal exported from each public electrode.

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

Optionally, the driving chip further comprises public voltage generating circuit, when the touch driving circuit is each When providing the touch driving signal to part public electrode, the public voltage generating circuit then provide the first common voltage to Remaining public electrode, wherein the touch driving signal is same voltage signal through the tune with first common voltage Signal after signal modulation processed.

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

Optionally, by being exported using driving chip described in the modulated signal synchronous modulation to the touch display panel All voltage signals, driving the touch display panel to execute, image display is kept the driving chip or/and image is aobvious During showing refreshing, further timesharing drives the multiple public electrode to execute self-capacitance touch-sensing.

Optionally, the touch driving circuit and the public voltage generating circuit pass through respectively a data selection circuit with The multiple public electrode alternative connection.

Optionally, the data selection circuit is formed on the touch display panel, or is integrated in the driving chip In.

Optionally, the driving chip further comprises the first ground terminal and the second ground terminal, the modulation circuit connection Between first ground terminal and second ground terminal, wherein second ground terminal is for connecting an equipment, receiving One ground signalling, the modulation circuit is according to the ground signalling and a driving signal generation higher than the ground signalling Modulated signal, and the modulated signal is exported to first ground terminal, wherein the driving chip is exported to be shown to described touch Show the voltage signal of panel on the basis of the voltage signal on first ground terminal.

Optionally, the modulation circuit exports the modulated signal and the ground signalling for timesharing and connects to described first Ground terminal；When the modulation circuit exports the ground signalling to first ground terminal, the public voltage generating circuit is logical The data selection circuit is crossed to be electrically connected with the multiple public electrode.

Optionally, when the modulation circuit exports the modulated signal to first ground terminal, in synchronization, institute It states touch driving circuit to be electrically connected by the data selection circuit with part public electrode, the public voltage generating circuit is logical The data selection circuit is crossed to be electrically connected with remaining public electrode.

Optionally, the touch display panel further comprises multiple pixel electrodes and display medium layer, the multiple picture Fringe field or parallel electric field are used to form between plain electrode and the multiple public electrode, wherein the multiple pixel electrode It is located on the same floor, arranges in two-dimensional array, the multiple public electrode is located on the same floor, and is arranged in two-dimensional array.

Optionally, when the modulation circuit exports the modulated signal to first ground terminal, the driving chip The first gray scale voltage is successively provided to the pixel electrode of each row, the touch driving circuit provides every time touches driving signal to one Capable or multirow public electrode, the public voltage generating circuit provide the first common voltage and give remaining public electrode.

Optionally, in synchronization, the pixel electrode of the first gray scale voltage from driving chip output is received With receive touch driving signal public electrode between non-overlap.

Optionally, the driving chip further comprises multiple signal processing circuits, the multiple signal processing circuit with The touch driving circuit connection, the signal processing circuit are used for the touch-sensing received according to the touch driving circuit Signal obtains touching position information, wherein the voltage signal in the signal processing circuit is with the electricity on first ground terminal On the basis of pressure signal.

Optionally, the touch driving circuit includes signal source and multiple operational amplifiers, wherein the operational amplifier Including the second amplifier and feedback branch, second amplifier includes in-phase end, reverse side and output end；The feedback branch Road is connected between the reverse side and output end of second amplifier；The output end of second amplifier further with the signal The in-phase end of processing circuit connection, the second amplifier connects the signal source, and the reverse side of the second amplifier further connects institute State data selection circuit；The signal processing circuit includes analog-digital conversion unit and computing unit, the analog to digital Converting unit is connected between the computing unit and the output end of second amplifier.

Optionally, the public voltage generating circuit and the touch driving circuit share the signal source, described public Voltage generation circuit further comprises follower and voltage regulator circuit, and the follower is connected to the signal source and the data are selected It selects between circuit, one end of the voltage regulator circuit is connect with the follower, and the other end is connect with the first ground terminal.

Optionally, the driving chip further comprises display processing circuit, display driver circuit and level conversion list Member, the display driver circuit include the public voltage generating circuit, and the display processing circuit is main from one for receiving The display data for controlling chip store the display data received, are decompressed and color adjustment, and after providing adjustment Display data give the level conversion unit, the level conversion unit carries out level conversion to the display data that receive, And the display data after output level conversion give the display driver circuit, the display driver circuit is according to the display received Data are corresponding to drive the touch display panel to show corresponding image；The level conversion unit is further at signal The touching position information for managing circuit output carries out level conversion, and provides the signal after conversion to the main control chip.

Optionally, the rangeability of the modulated signal is between 0.15 volt to 0.3 volt.

Optionally, the amplitude of the modulated signal is 0.2 volt.

Optionally, the modulated signal is periodically variable square-wave signal, and the square-wave signal includes being alternately present First reference signal and the second reference signal, wherein the level of the first reference signal is lower than the level of the second reference signal, each The duration of first reference signal is greater than or equal to the duration of every one second reference signal.

Optionally, the duration of first reference signal is twice of the duration of second reference signal.

The present invention also provides a kind of electronic equipment, including the touch display unit described in any one of above-mentioned.

Detailed description of the invention

Fig. 1 is the structure schematic diagram of the application electronic equipment.

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

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

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

Fig. 5 is the electrical block diagram of a specific embodiment of electronic equipment shown in Fig. 1.

Fig. 6 is the decomposition texture schematic diagram of an embodiment of touch display panel shown in Fig. 5.

Fig. 7 is the schematic diagram of the section structure of touch display panel shown in Fig. 6.

Fig. 8 is the schematic diagram of the section structure of another embodiment of touch display panel shown in Fig. 5.

Fig. 9 is the schematic top plan view of touch display panel shown in Fig. 8.

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

Figure 11 is the structural schematic diagram of an embodiment of a signal processing unit of signal processing circuit shown in Figure 10.

Figure 12 is the structural schematic diagram of the another embodiment of the application electronic equipment.

Figure 13 is the electrical block diagram of an embodiment of protection circuit shown in Figure 12.

Figure 14 is the electrical block diagram for protecting another embodiment of circuit.

Figure 15 is the schematic diagram of an embodiment of display processing circuit shown in Figure 12.

Specific embodiment

To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing 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 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 appended drawing reference 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 appended drawing references, according to technology Relevance and related text explanation, those skilled in the art is can directly or indirectly to judge to learn.

In addition, described feature, structure can be incorporated in one or more embodiments in any suitable manner In.In the following description, many details are provided to provide and fully understand to embodiments of the present invention.However, One of ordinary skill in the art would recognize that without one or more in the specific detail, or using other structures, constituent element Deng technical solution of the present invention can also be practiced.In other cases, be not shown in detail or describe known features or operation with Avoid 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 be suitable for technology, method, physical component and system (no matter mesh It is preceding whether to know), including read those skilled in the art after the application and be inferred to or its educible extension.

In the description of the present invention, it is to be understood that: " multiple " includes two and two or more, 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 column with More than two column, 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 name, clearly distinguishes each element, so that description is more succinct understandable.

Obscure in order to avoid understanding, need further predeclared to have:

For general display device, display device generally includes display panel and driving circuit.The driving electricity Road is shown for driving the display panel to execute image.The display panel generally includes multiple pixels, each pixel Including first electrode and second electrode.The driving circuit provides identical voltage (example by the first electrode to each pixel For example 0 volt), different voltage is provided to the second electrode of each pixel, to realize that the image of different grayscale is shown.

When the display device is liquid crystal display device, the first electrode is commonly known as public electrode, and described the Two electrodes are commonly known as pixel electrode.The driving circuit is by providing common voltage to first electrode, offer gray scale voltage It drives liquid crystal display panel to execute image display to second electrode to refresh.Ground is changed, the display device can also be other The display device of suitable type, such as display device of electronic paper (EPD), organic electroluminescent diode display device (OLED) Deng.When display device is OLED, first electrode is also referred to as cathode, and second electrode is also referred to as anode.

For each pixel, image display status generally comprises image and shows that Flushing status and image display are protected Hold state.By taking single pixel as an example, when the driving circuit provide gray scale voltage to second electrode, provide common voltage to the When one electrode, the pixel, which starts to execute image display, to be refreshed, and after the gray scale voltage is written to second electrode, is stopped Gray scale voltage is provided to the second electrode, image display, which refreshes, to be completed.Later, the pixel enters image display holding shape State, until the pixel receives gray scale voltage next time.

Generally, the multiple pixel is for example arranged in determinant.The driving circuit usually drives pixel line by line Image display is executed to refresh.

Illustrate that image display refreshes in advance above and show both different display states of holding from image, is for preferably Understand that the application each embodiment described below is prepared.

As previously mentioned, the title of first electrode, second electrode in different types of display device is different, for suitable With the display device of each suitable type of the application, unitedly calling first electrode is public electrode, and unitedly calling second electrode is pixel Electrode.Correspondingly, the display voltage signal that the driving chip of following the application is supplied to public electrode is common voltage, is supplied to The display voltage signal of pixel electrode is gray scale voltage.

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

In the touch system based on mutual capacitance, touch screen may include (for example) driving area and sensing area, such as driving line And sense wire.In an example case, driving line can form multirow, and sense wire can form multiple row (for example, orthogonal).Touch picture Element may be disposed at the intersection of row and column.During operation, the row can be motivated with AC signal (AC) waveform, and mutually electricity Appearance can be formed between the row and column of the touch pixel.When a target object is close to the touch pixel, it is coupled in the touch picture Some charges between the row and column of element can be changed to be coupled on the object.It is coupled in this reduction of the charge in the touch pixel The reduction of AC waveform that can lead to the only reduces of the mutual capacitance between row and column and be coupled in the touch pixel.Charged Couple AC This reduction of waveform can be detected and be measured by touch system to determine position of the target 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 a target object is close to the touch pixel, another direct-to-ground capacitance (capacitance to ground) can It is formed between the target object and the touch pixel.Another direct-to-ground capacitance can lead to the self-capacitance that the touch pixel is subjected to Net increase.This self-capacitance increase can be detected and be measured by touch system to determine the target object when touching the touch screen Position.

In the following, being illustrated to present embodiments.

It is the structural schematic diagram of one embodiment of the application electronic equipment also referring to Fig. 1 and Fig. 2, Fig. 1.Fig. 2 is Fig. 1 The waveform diagram of one embodiment of the part signal of shown electronic equipment.The electronic equipment 100 for example portable electronic The product of the various suitable types such as product, smart home electronic product and vehicle electronics product, the present invention do not limit this System.The portable electronic product is, for example, mobile phone, tablet computer, laptop, wearable device etc..The intelligence man Occupying electronic product is, for example, desktop computer, refrigerator, washing machine, TV etc..The vehicle electronics product is, for example, navigator, vehicle Carry DVD etc..The electronic equipment 100 includes touch display unit 1.The touch display unit 1 shows for realizing image With touch-sensing.The touch display unit 1 for example but be not limited to In-Cell (formula or embedded in box) type touch it is aobvious Showing device.The touch display unit 1 is, for example, liquid crystal display device.So, ground is changed, the touch display unit 1 can also For the display device of other suitable types, e.g., display device of electronic paper (EPD), organic electroluminescent diode display device (OLED) etc..

The touch display unit 1 includes touch display panel 10 and driving chip 20.The driving chip 20 is for driving It moves the touch display panel 10 and executes image and show and touch-sensing.

In one embodiment, the touch display panel 10 includes multiple public electrodes 101.The multiple public electrode 101 are used as show electrode and touch-sensing electrode.The driving chip 20 and the multiple public electrode 101 are separately connected, and are used In providing common voltage to the multiple public electrode 101, shown with driving the multiple public electrode 101 to execute image.Institute It states driving chip 20 and also provides for touching driving signal to the multiple public electrode 101, to drive the multiple common electrical Pole 101 executes touch-sensing.Preferably, the driving chip 20 is for driving the multiple public electrode 101 to execute self-capacitance Touch-sensing.

The multiple public electrode 101 is for example arranged in two-dimensional array, and specifically, the multiple public electrode 101 is along the side X It arranges to Y-direction in multiple lines and multiple rows, wherein the X-direction is line direction, and the Y-direction is column direction.So, ground is changed, In other embodiments, the multiple public electrode 101 can also arrange in Else Rule or non-regular, and the application is to this And with no restrictions.The shape of each public electrode 101 for example but is not limited to rectangle.

The driving chip 20 passes through for generating modulated signal MGND and utilizes the modulated signal MGND synchronous modulation The output of driving chip 20 is to all voltage signals of the touch display panel 10, and Lai Shixian is in the driving touch display Panel 10 executes in the arbitrary process that normal picture is shown, can further drive public electrode 101 to execute self-capacitance and touch sense It surveys.Therefore, even if the display resolution when touch display panel 10 improves, the time of touch-sensing can't also be shortened, in turn Break display resolution and increases inadequate technical bottleneck of brought touch-sensing time.Correspondingly, the electronic equipment 100 User experience is preferable.

In particular, the driving chip 20 is while driving the touch display panel 10 to execute image display to refresh, Public electrode 101 can be further driven to execute self-capacitance touch-sensing.To the touch-sensing of the touch display unit 1 It is carried out during being not limited in the I of gap in the ranks (see Fig. 2), frame gap that image shows.

In the present embodiment, the modulated signal MGND is periodically variable square-wave signal.So, ground is changed, In other embodiment, the modulated signal MGND can also be for example other suitable waves such as sine wave signal, step signal Shape.Further, the modulated signal MGND can also be the signal of aperiodicity change.

When the driving chip 20, which drives the touch display panel 10 to be performed simultaneously image, to be shown with touch-sensing, institute It states the element on touch display panel 10 or is directly driven by the driving chip 20, or driven indirectly by the driving chip 20 It is dynamic.By taking the element on the touch display panel 10 as an example, when the element is directly driven by the driving chip 20, institute Stating the voltage signal on element is the signal exported from the driving chip 20；When the element is not by the driving chip 20 When directly driving, then for example by capacitive coupling, by the driving chip 20, driving, capacitive coupling are for example present in by institute indirectly It states between the element that driving chip 20 directly drives and the element driven indirectly by the driving chip 20, correspondingly, the member The signal of part is superimposed the modulated signal MGND because of capacitive coupling.To which all voltages on the touch display panel 10 are believed It number is through the modulated signal of modulated signal MGND.Element in addition to capacitive coupling, in the touch display panel 10 Such as it can also be by elements such as resistance by the driving indirectly of driving chip 20.

Correspondingly, feel when the driving chip 20 drives the touch display panel 10 to be performed simultaneously image and show with touch When survey, all voltage signals on the touch display panel 10 are through the modulated signal of modulated signal MGND.Its In, all voltage signals on the touch display panel 10 change with the variation of the modulated signal MGND.Preferably, Each voltage signal on the touch display panel 10 is increased with the raising of the modulated signal MGND, is believed with the modulation The reduction of number MGND and reduce.

In this way, the driving chip 20 can modulate all electricity of the touch display panel 10 by synchronous or near-synchronous Signal is pressed, Lai Shixian is driving the touch display panel 10 to execute in the arbitrary process that normal picture is shown, can drive simultaneously Public electrode 101 executes touch-sensing.Further, due to being modulated by the modulated signal MGND, the touch driving signal It can be elevated, therefore, the output of public electrode 101 can be lifted correspondingly to the touch-sensing signal of the driving chip 20 Height so that the signal-to-noise ratio of the touch-sensing of the touch display unit 1 can be improved, and then improves the touch display unit 1 The accuracy of touch-sensing.

Optionally, the driving chip 20 drives the multiple public electrode 101 to execute touch-sensing for timesharing.Example Such as, each drive part public electrode 101 of the driving chip 20 executes touch-sensing, by repeatedly driving, completes to all Public electrode 101 executed touch-sensing.

In certain specific embodiments, the driving chip 20 can for example drive 101 execution figure of public electrode line by line As display and touch-sensing, it can also once drive multirow public electrode 101 to execute image simultaneously and show and touch-sensing.

Sense is touched since 20 timesharing of driving chip (e.g., by row or line by line) driving public electrode 101 executes self-capacitance It surveys, therefore, the output pin of the driving chip 20 then compared to driving all public electrode 101 to execute self-capacitance touching simultaneously The output pin for touching the chip of sensing will lack, and so as to reduce the area of the driving chip 20, and then reach and save cost Purpose.

So, ground is changed, in other embodiments, the driving chip 20 can also drive whole public electrodes simultaneously 101 execute touch-sensing.Alternatively, the driving chip 20 can also be used timesharing driving with drive simultaneously the mode combined to institute It states multiple public electrodes 101 and executes touch-sensing.

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

It is shown it should be noted that the driving chip 20 drives the multiple public electrode 101 to execute image at the same time During, realize that timesharing drives the multiple public electrode 101 to execute self-capacitance touch-sensing.In a specific embodiment In, the driving chip 20 for example provides touch driving signal every time and shows and touch to the execution image of part public electrode 101 Sensing, then the corresponding common voltage that provides is shown the driving chip 20 to remaining public electrode 101 execution image.Wherein, institute It is identical as the common voltage to state touch driving signal, and is through the modulated signal of modulated signal MGND.

Further, the driving chip 20 also receives the touch-sensing signal exported from public electrode 101, to obtain Touching position information of the target object on the touch display panel 10.The target object is, for example, the finger of user, touching Control the suitable objects such as pen.

It is identical as common voltage due to touching driving signal, the public electrode 101 for being provided touch driving signal exists While executing touch-sensing, it is able to carry out normal image and shows.Correspondingly, the touch-sensing of the touch display unit 1 Show with image to carry out simultaneously.In particular, it is shown when the driving chip 20 drives the touch display panel 10 to execute image When showing refreshing, public electrode 101 can further be driven to execute self-capacitance touch-sensing.

Optionally, the driving chip 20 executes touch-sensing for touch display panel 10 described in intermittent drive.Example Such as, in one embodiment, the driving chip 20 is driving the touch display panel 10 to be performed simultaneously touch-sensing and image It shows up to after one first predetermined time, then drives the touch display panel 10 to execute image again and show and stop executing touching Sensing is touched up to one second predetermined time, is looped back and forth like this, the realization of touch display unit 1 image is shown and touch-sensing.

When the driving chip 20 drives the touch display panel 10 to be performed simultaneously touch-sensing and image display, institute All voltage signals or the driving chip 20 stated on touch display panel 10 are exported to the institute of the touch display panel 10 Voltage signal is on the basis of the modulated signal MGND.

Feel when the driving chip 20 drives the touch display panel 10 to execute image and show rather than be performed simultaneously to touch When survey, substitution generates the modulated signal MGND, and the driving chip 20 generates a constant voltage signal, the touch display dress Setting all voltage signals on 1 is on the basis of the constant voltage signal.

Preferably, the constant voltage signal is ground signalling GND, the ground signalling GND is, for example, the perseverance of 0V (volt) Determining voltage signal, but it is not limited to the constant voltage signal of 0V, it can also be the constant voltage signal close to 0V, the ground 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 for example 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 It may also be the equipment earth ground when equipment 100 is connect by conductor with earth ground.

Wherein, the modulated signal MGND is the signal changed relative to the ground signalling GND.

Ground is changed, in other embodiments, the driving chip 20 for example can also be that described touch is driven to show always Show that panel 10 is performed simultaneously image and shows and touch-sensing.Or each first predetermined time may be the same or different, each second is pre- Fixing time may be the same or different.

It can be seen from the above, the touch driving signal is used as common voltage simultaneously.In order to distinguish the touch display dress When setting 1 execution touch-sensing and non-executing touch-sensing, the driving chip 20 is supplied to the public affairs of the multiple public electrode 101 Common voltage is different, defines the touch display unit 1 when executing touch-sensing, the driving chip 20 is supplied to the multiple The common voltage of public electrode 101 be the first common voltage Vcl, define the touch display unit 1 execute image show and When non-concurrent execution touch-sensing, the common voltage that the driving chip 20 is supplied to the multiple public electrode 101 is second Common voltage Vc2.

Preferably, the pressure difference between the first common voltage Vc1 and the modulated signal MGND remains unchanged.That is, institute The relatively described modulated signal MGND of the first common voltage Vc1 is stated to remain unchanged.The relatively described ground connection of first common voltage Vc1 Signal GND is the signal of variation.

The second common voltage Vc2 is remained unchanged compared to the ground signalling GND.So, with changing, described second Common voltage Vc2 can also be the signal of variation, for example, a square-wave signal compared to the ground signalling GND.When described second When common voltage Vc2 and the first common voltage Vc1 are periodic square-wave signal, the frequency of the second common voltage Vc2 Less than the frequency of the first common voltage Vc1.

It needs to illustrate again, by taking a public electrode 101 as an example, when the driving chip 20 drives the public electrode 101 are performed simultaneously image when showing with touch-sensing, are supplied to the first common voltage Vc1 of the public electrode 101 while using Make display drive signals and touches driving signal；It is shown when the driving chip 20 drives the public electrode 101 only to execute image When showing, the first common voltage Vc1 for being supplied to the public electrode 101 is used only as display drive signals.

As shown in the above, sense is touched when the driving chip 20 drives the multiple 101 timesharing of public electrode to execute When survey, it is not all simultaneously that the driving chip 20, which is supplied to the first common voltage Vc1 of the multiple public electrode 101 simultaneously, As touch driving signal.However, when the driving chip 20 drives the multiple public electrode 101 to be performed simultaneously touch-sensing When, it is supplied to the first common voltage Vc1 of the multiple public electrode 101 simultaneously and is used as touching driving signal.

In particular, when 20 timesharing of driving chip drives the multiple public electrode 101 to execute touch-sensing, although The driving chip 20 provides identical first common voltage Vc1 to the multiple public electrode 101 simultaneously, but the driving It drives public electrode 101 to be performed simultaneously image in chip 20 to show and the circuit structure of touch-sensing and driving public electrode 101 The circuit structure that image is shown only is executed to be different.About this, can be illustrated below the application.

Since all voltage signals on the touch display panel 10 are through the modulated signal MGND synchronous modulation Signal afterwards, therefore, it is modulated in all voltage signals after display drive signals can drive the touch display panel 10 Execute normal picture show, and it is modulated after display drive signals, for example, the first common voltage Vc1, can further be applicable in Self-capacitance touch-sensing is executed in driving public electrode 101.Correspondingly, the driving chip 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 simultaneously, and the touch is felt Survey will not influence normal image and show.Further, even if the display resolution when touch display unit 1 improves, also not The time of touch-sensing can be shortened, to improve the user experience of electronic equipment 100.

In order to better understand, can be referring now to Fig. 5, generally, the touch display panel 10 includes multiple pixels 11, Each pixel 11 includes public electrode 101 and pixel electrode 103.Between the public electrode 101 and the pixel electrode 103 Pressure absolute value of the difference determine the display tonal gradation of the pixel 11.When the driving chip 20 drives described touch to show When showing that panel 10 executes touch-sensing, public electrode 101 is synchronous by the modulated signal MGND with the signal on pixel electrode 103 After modulation, the display pressure difference between public electrode 101 and pixel electrode 103 will not change, and therefore, touch display panel 10 carries out Normal image is shown.And it can be further used as touching through the modulated first common voltage Vc1 of the modulated signal MGND and drive Dynamic signal.Therefore, during ensuring that touch display panel 10 executes normal display image, the driving chip 20 can be into One step drives public electrode 101 to execute self-capacitance touch-sensing.

It should be noted that for executing the pixel 11 that image display refreshes and the pixel that execution image display is kept For 11, the signal on the pixel electrode 103 for the pixel 11 that image display refreshes is executed to be provided from driving chip 20 Modulated signal, execute image display keep pixel 11 pixel electrode 103 on signal because capacitive coupling be superimposed The modulated signal MGND.

The touch display unit 1 is, for example, high definition (HD) display device, full HD (FHD) display device, ultra high-definition (UHD) various types of display devices such as display device, accordingly, display resolution be, for example, 1280x720,1920x1080, 3840x2160, so, the display resolution are not limited thereto, for example, 2K can be when display resolution is 2K 1920x1080 can also be so the various suitable conditions such as 2560X1440.It similarly, can also when display resolution is 4K, 8K Including a variety of situations.It, can be into one in the arbitrary process that its image is shown for the touch display unit 1 of the application Step executes touch-sensing, and touch-sensing does not influence normal image and shows.

Since the voltage signal on the touch display panel 10 is by the modulated signal MGND synchronous modulation, and it is modulated The first common voltage Vc1 afterwards can be used as simultaneously display drive signals and touch driving signal, therefore, the touch display unit 1 can be performed simultaneously image display refreshing and self-capacitance touch-sensing, and the image of the touch display unit 1 shows and feels with touch Between survey and there is no interference or interference are smaller.

In addition, refresh under the driving of the driving chip 20 in non-image display when the touch display panel 10 When state, for example, in the ranks gap I (as shown in Figure 2), frame gap when, the driving chip 20 can also drive public electrode 101 together Execute self-capacitance touch-sensing.At this point, the state that the touch display panel 10 is kept generally in image display, due to using The modulated signal MGND synchronizes modulation to the signal that driving chip 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. 5), correspondingly, touch The image of display panel 10 shows preferable with the quality of touch-sensing.

Since the driving chip 20 is driving the touch display panel 10 to execute in the arbitrary process that image is shown, Public electrode 101 can be driven to execute touch-sensing together, therefore, manufacturer can drive driving chip 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 image is shown, Execute touch-sensing.More specifically, for example, executing touch during image display refreshes and/or in the ranks during gap I, frame gap Sensing, etc..

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

It should be noted that for the multiple public electrode 101 as a whole for, the driving chip 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 chip 20 can execute touch-sensing for drive part public electrode 101 simultaneously.Example Such as, the driving chip 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 electrodes 101 by repeatedly driving.

In this application, as long as the driving chip 20 is just completed to the multiple public electrode 101 by repeatedly driving A touch-sensing, that is, defining the driving chip 20 is that timesharing drives the multiple public electrode 101 to execute touch-sensing.

The multiple public electrode 101 is driven to execute self-capacitance touch-sensing 20 timesharing of driving chip, at certain In a little embodiments, may be, for example: the driving chip 20 executes self-capacitance touch-sensing by row driving public electrode 101.When The driving chip 20 provides the first common voltage Vc1 and executes self-capacitance touch-sensing and figure to a line public electrode 101 When as display, the execution image of public electrode 101 for also providing the first common voltage Vc1 to remaining row is shown.When the drive After dynamic chip 20 drives a line public electrode 101 to execute self-capacitance touch-sensing, next, driving another row public electrode 101 execution self-capacitance touch-sensings and image are shown, and are driven the public electrode 101 of remaining row to execute image and shown.In this way, logical Repeatedly driving is crossed, completes to drive a touch-sensing of all public electrodes 101.

It should be noted that the public electrode 101 that successively driving executes touch-sensing of driving chip 20 can be weighed partially Folded or non-overlapping.

In particular, self-capacitance is executed for touch display panel 10 described in 20 intermittent drive of driving chip and touches sense The mode of survey, defining there are the period of the execution touch-sensing of public electrode 101 is the first period W1, defines the multiple common electrical Pole 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 it Between include the second period W2.For example, first period W1 and second period W2 are alternately.

In the first period W1, the driving chip 20 generates the modulated signal MGND, and utilizes the modulated signal The input signal of touch display panel 10 described in MGND synchronous modulation.Correspondingly, the driving chip 20 exports described the simultaneously One common voltage Vcl executes image to the multiple public electrode 101 and shows, and timesharing receives and comes from the multiple public electrode The touch-sensing signal of 101 outputs, to obtain touch information.

For the ease of carrying out understanding differentiation with the signal of the second following period W2, the driving chip 20 is defined first It is the first signal that period W1, which is exported to the voltage signal of the touch display panel 10, defines the driving chip 20 second It is second signal that period W2, which is exported to the voltage signal of the touch display panel 10,.Correspondingly, first signal includes The first common voltage Vc1.

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

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

The second signal includes the second common voltage Vc2.In the second period W2, the output of driving chip 20 the Two common voltage Vc2 execute image to the multiple public electrode 101 and show.

The first common voltage Vc1 is, for example, the second common voltage Vc2 after modulated signal MGND modulation Signal.For liquid crystal display device, the second common voltage Vc2 is, for example, (- 1) V, so, for other types of For display device, the second common voltage Vc2 can also be the voltage signal of other sizes.

The amplitude of the modulated signal MGND is, for example, the signal between 0.15V to 0.3V.Optionally, the modulated signal The amplitude of MGND is, for example, the signal of 0.2V.

So, the present invention is not limited thereto, and the signals such as the modulated signal MGND, described second common voltage Vc2 can also For the signal of other suitable types.

Since in the second period W2, the driving chip 20 is not touched using described in the modulated signal MGND synchronous modulation The input signal of display panel 10 is touched, for example, the driving chip 20 is still using existing display driving method to the touching It touches display panel 10 to be driven, therefore, the touch display unit 1 is used in the second period W2 compared in the first period W1 The technical solution of modulation wants relative reduction power consumption.

It can be seen from the above, driving chip 20 executes touch-sensing using the multiple public electrode 101 of intermittent drive Mode, the touch display unit 1 not only can further execute self-capacitance in executing the arbitrary process that image is shown and touch sense It surveys, the problem that can also avoid causing power consumption larger due to using modulation scheme as far as possible.

In the first period W1, the driving chip 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 chip 20 is again It can be there are many situation, for example, the driving chip 20 drives all public electrodes 101 to execute the number phase of touch-sensing Together, it alternatively, the number that drives a part of public electrode 101 to execute touch-sensing of the driving chip 20 is identical, drives another The number that part public electrode 101 has executed touch-sensing is identical, and so, the driving chip 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 the second period W2 need to touch 1 whole detection of touch display unit Touching to operate and be not present influences, and can also reduce power consumption to a certain extent on the contrary.

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

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

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

The touch driving circuit 23 is shown and self-capacitance touch for driving same public electrode 101 to be performed simultaneously image Sensing.

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

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

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

The modulation circuit 21 is for generating the modulated signal MGND.The modulated signal MGND includes first with reference to letter Number with the second reference signal.The voltage condition of first reference signal and the second reference signal can be in following five kinds of situations Any one:

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

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

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

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

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

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

In the present embodiment, the first reference signal of the modulated signal MGND is ground signalling GND, second ginseng Examining signal is the driving signal higher than the first reference signal.For example, the ground signalling GND is 0V, the driving signal is 0.2V.So, the ground signalling is 0V, the driving signal is the case where 0.2V is an example, and manufacturer can be according to product Corresponding adjustment made to the amplitude of the modulated signal MGND, the application is to this and with no restrictions.

In addition, by the first reference signal be low level signal, the second reference signal for the signal of high level for, preferably Ground, the duration of the first reference signal of the modulated signal MGND are 2 times of the duration of the second reference signal.Or Person changes ground, the duration of the first reference signal of the modulated signal MGND and the duration of the second reference signal It is identical.

When 2 that the duration of the first reference signal of the modulated signal MGND is the duration of the second reference signal Times when, the driving chip 20 carries out reset operation during the first half of the first reference signal, in the first reference signal Latter half and the second reference signal duration of existence carry out the sampling of touch-sensing signal respectively.It so, it is possible to improve and touch The precision of sensing.

Duration and the duration phase of the second reference signal when the first reference signal of the modulated signal MGND Meanwhile the driving chip 20 for example carries out reset operation in the first reference signal duration of existence, exists in the second reference signal Period carries out the sampling of touch-sensing signal respectively.

So, the present invention is not limited thereto, the first reference signal of the modulated signal MGND and the second reference signal Duration can also be other suitable types.

Optionally, the driving chip 20 further comprises voltage generation circuit 27.The voltage generation circuit 27 is used for Generate second reference signal.The modulation circuit 21 generates with connecting the equipment of the electronic equipment 100 with the voltage Circuit 22, the second reference signal that the ground signalling GND and the voltage generation circuit 22 for receiving the equipment ground are generated are right The modulated signal MGND should be generated.To distinguish ground signalling GND, the modulated signal is denoted as MGND.

In the present embodiment, the driving chip 20 is by providing the modulated signal MGND in driving chip 20 Partially, reach all voltage signals on synchronous modulation touch display panel 10, to drive the touch display surface Plate 10 is performed simultaneously normal image and shows and touch-sensing.As long as that is, this partly on signal be modulated signal MGND, institute All voltage signals for stating touch display panel 10, which synchronize, to be become through the modulated signal of modulated signal MGND.

As shown in the above, it is shown when the driving chip 20 drives the touch display panel 10 to be performed simultaneously image When with touch-sensing, the driving chip 20 is including two parts, wherein partially for loading the modulated signal MGND, partially for loading the ground signalling GND.

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

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

Predeclared to be, in the present embodiment, in the first period W1, the public voltage generating circuit 22 is touched Driving circuit 23, signal processing circuit 26, data selection circuit 24 and control circuit 25 are located in the domain 90, in addition, described Touch display panel 10 also is located in the domain 90；The modulation circuit 21 and voltage generation circuit 27 are located in the domain 80.

The modulation circuit 21 includes modulated terminal M.The modulation circuit 21, which exports the modulation by the modulated terminal M, to be believed Number MGND is given to the ground terminal of each circuit in domain 90, thus, using modulated signal MGND as in the domain 90 of voltage basis of reference Circuit output gives the touch display panel 10 through the modulated voltage signal of modulated signal MGND.Wherein, the modulation Hold M connection modulation ground, or one end as modulation ground.In addition, for instance in the element of vacant state on touch display panel 10 Signal on (e.g., the aftermentioned pixel electrode 103 for executing image display and keeping, see Fig. 5) is because capacitive coupling effect is superimposed the tune Signal MGND processed.Therefore, all voltage electric signals on the first period W1, the touch display panel 10 become through described The modulated signal of modulated signal MGND.

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

In the second period W2, the electronic equipment 100 is using ground signalling GND as voltage reference on the whole.

Correspondingly, in the first period W1, the modulation circuit 21 is according to the ground signalling GND of equipment ground and from described The driving signal of voltage generation circuit 27 is corresponding to generate the modulated signal MGND, and provides the modulated signal MGND to described Modulation ground.The public voltage generating circuit 22 is corresponding to generate the first common voltage Vc1, and selects electricity by the data Road 24 is supplied to the corresponding execution of public electrode 101 image and shows.The touch driving circuit 23 is corresponding to generate first public affairs Common voltage Vc1, and corresponding public electrode 101 is supplied to by the data selection circuit 24 executes image 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 being used as aobvious Show driving signal and touches driving signal, first common electrical of the output of public voltage generating circuit 22 to public electrode 101 Pressure Vc1 is used only as display drive signals.

The touch driving circuit 23 and the public voltage generating circuit 22 are exported to the multiple public electrode 101 First common voltage Vc1 is through the modulated identical signal 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, touches letter to obtain Breath.Therefore, the driving chip 20 can drive the touch display panel 10 to be performed simultaneously image and show and self-capacitance touch Sensing.

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

In addition, since the circuits such as the modulation circuit 21 and touch driving circuit 23 are all integrated in single driving chip In 20, and single chip saves space compared to multiple chips, and therefore, the touch display unit 1 accounts for the electronic equipment 100 Space it is smaller.In addition, single chip is more advantageous to assembling and the production pipe of touch display unit 1 compared to multiple chips Reason improves production efficiency, thus, reduce the manufacturing cost of the electronic equipment 100.

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

Preferably, the data selection circuit 24 is controlled by the control circuit 25 in the second period W2, it is the multiple The second common voltage Vc2 on public electrode 101 is all from the public voltage generating circuit 22.The touch driving circuit 23 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 gives the multiple public electrode 101, thus, so that the touching Display device 1 is touched to show in the second period W2 execution image and stop executing touch-sensing.

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

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

The touch driving circuit 23 is different from the circuit structure of the public voltage generating circuit 22.The touch driving Circuit 23 can further receive the touch-sensing signal exported from public electrode 101.26 basis of signal processing circuit The touch-sensing signal obtains touching position 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 signal processing circuit 26 can obtain touching position information according to touch-sensing signal.

Relatively, the public voltage generating circuit 22 does not receive the signal from public electrode 101.

Preferably, the public voltage generating circuit 22 shares same signal source 221, institute with the touch driving circuit 23 Signal source 221 is stated by the modulation of the modulated signal MGND, one first reference voltage signal of corresponding generation.The common voltage produces Raw circuit 22 exports the first common voltage identical with first reference voltage signal with the touch driving circuit 23 respectively Vc1 gives the multiple public electrode 101, wherein the public electrode 101 being electrically connected with public voltage generating circuit 22 only executes Image is shown, is felt with touching the public electrode 101 that driving circuit 23 is electrically connected and being performed simultaneously image and show to touch with self-capacitance It surveys.

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 for ringing execution self-capacitance touch-sensing is performed simultaneously normal image and shows.In addition, due to the common voltage Generation circuit 22 and the touchs driving circuit 23 share same signal source 221, therefore, the public voltage generating circuit 22 and It is described touch driving circuit 23 output to the multiple public electrode 101 signal can reach it is identical or essentially identical, thus really Protect the quality that touch-sensing and image are shown.

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

The signal source 221 includes ground terminal a and output end b.The ground terminal a is connect with the modulation.It is described defeated Outlet b is connect with the follower 222.The signal source 221 is, for example, DC source, so, the present invention to this and with no restrictions, institute Stating signal source 221 can also be other suitable circuit structures.

The follower 222 transmits signal that the signal source 221 exports to the data selection circuit 24, and passes through institute It states data selection circuit 24 and is supplied to corresponding public electrode 101 and executes image and show.The follower 222 for example, first is put Big device, so, the present invention is not limited thereto, and the follower 222 can also be other suitable circuit structures, it is not limited to institute State the first amplifier.In the specific embodiment, it is 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 output 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 for connecting modulation 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 is shorted.The first output end g1 is connect with the data selection circuit 24.

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

When work, the modulated signal MGND is received in the first period W1, the ground terminal a and third ground terminal d1, The signal source 221 is corresponding export first reference voltage signal to first amplifier 222 by the output end b, First amplifier 222 is in empty short status, then it is public to export identical with first reference voltage signal first for correspondence Voltage Vc1 gives the data selection circuit 24, is supplied to corresponding public electrode 101 by the data selection circuit 24 and executes 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 corresponding to export the second reference voltage signal to first amplifier 222, first amplification by the output end b Device 222 is in empty short status, then corresponding to transmit second common voltage Vc2 identical with second reference voltage signal to described Data selection circuit 24, and the multiple execution of public electrode 101 image is supplied to by the data selection circuit 24 and is shown.

The touch driving circuit 23 is for example including the signal source 221 and multiple operational amplifiers 231.Each operation is put Big device 231 includes the second amplifier 232 and feedback branch 233.Second amplifier 232 includes the 4th power end c2, the 4th Ground terminal d2, the second in-phase end e2, the second reverse side f2 and second output terminal g2.Wherein, the 4th power end c2 is 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 connection in source 221.The second reverse side f2 is connect with the data selection circuit 24, and further by 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, is supplied to corresponding public electrode 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。

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 passes through the corresponding public electrode 101 that one column of connection may be selected of the data selection circuit 24.So, the multiple The number of operational amplifier 231 can also 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 column can also corresponding selection connect two operational amplifiers 231 etc. embodiment be also can With.

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

In the second period W2, with becoming equipment, the signal source 221 exports the second reference voltage signal to described on modulation ground Follower 222 and the multiple operational amplifier 231, the control circuit 25 control the selection of data selection circuit 24 output The second common voltage Vc2 from common voltage electricity production road 22 executes image to the multiple public electrode 101 and shows.

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

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

Citing, the multiple public electrode 101 are that the matrix form arranged in 26 rows 40 is arranged, accordingly, the multiple operation The quantity of amplifier 231 is 40, and the quantity of second data selector 242 is 40.First data selector 241 Including the first output port O1, for exporting the signal from the public voltage generating circuit 22 to corresponding public electrode 101.The quantity of the first output port O1 is identical as the line number of the multiple public electrode 101, and as 26.Every one second Data selector 242 includes second output terminal mouth O2, for exporting from the signal for touching driving circuit 23 to corresponding Public electrode 101.The quantity of the second output terminal mouth O2 is identical as the line number of the multiple public electrode 101, and as 26. It should be noted that being limited to the size of diagram in Fig. 2, part circuit structure actually only being shown, for example, only showing 2 fortune Calculate 231,2 the second data selectors 242 of amplifier and part public electrode 101.

In the present embodiment, the second output terminal mouth O2 of every one second data selector 242 is separately connected a common electrical Pole 101.Every one first output port O1 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, ground is changed, in other embodiments, the quantity of first data selector 241 can also be multiple, and It is not limited to one, correspondingly, the first output port O1 of the multiple first data selector 241 and the multiple second number Adjustment can be corresponded to according to the connection relationship between the second output terminal mouth O2 of selector 242, for example, every one first data selector 241 are connected with the second data selector of part 242, so, can also be, the first output end of every one first data selector 241 Mouthful O1 is connect, etc. with the part second output terminal mouth O2 of the multiple second data selector 242.

In the first period W1, the multiple second data selector 242 is 26 numbers for selecting 1 under the control of control circuit 25 According to selector, correspondingly, output is public from touch driving circuit 23 described first every time for every one second data selector 242 Voltage Vc1 gives a public electrode 101, and by 26 times, the multiple second data selector 242 drives all public electrodes 101 have executed a touch-sensing.The 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 in one or more first periods W1 completions.

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

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

By the data selection circuit 24, on the one hand can reduce driving chip 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.

Ground is changed, in some embodiments, the touch display unit 1 can also show equal with touch-sensing for image In lasting progress, for example, in time, the public voltage generating circuit 22 is persistently mentioned with the touch driving circuit 23 For the first common voltage Vc1 to public electrode 101, spatially, the public voltage generating circuit 22 and the touch Driving circuit 23 matches the multiple public electrode 101 of driving.In other words, without the second period W2, the control circuit 25 Corresponding control first data selector 241 remains that 26 select 25, controls the multiple second data selector 242 always 26 are kept to select 1.

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 chip 20 for example can further comprise fingerprint driving circuit, described Fingerprint driving circuit alternative connects the multiple public electrode 101, when the driving chip 20 is in drive part common electrical When pole 101 is performed simultaneously touch-sensing and image and shows, the fingerprint driving circuit can also drive part public electrode 101 simultaneously It executes fingerprint sensing and image is shown, 22 drive part public electrode of public voltage generating circuit executes image and shows.Therefore, originally In application, what driving public electrode 101 worked is not limited to public voltage generating circuit 22 and touches driving circuit 23, 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 Stating modulation circuit 21 includes the first active switch 211, the second active switch 213 and control unit 215.Wherein, it first active opens Closing 211 includes control terminal K1, the first transmission end T1 and the second transmission end T2, and the second active switch 213 includes control terminal K2, the One transmission end T3 and the second transmission end T4.Control terminal K1, K2 is connect with control unit 215.First active switch 211 The second transmission end T2 connect with the first transmission end T3 of the second active switch 213 and in defining an output node on connecting line The first transmission end T1 of N, the first active switch 211 receive the first reference signal, the second transmission end T4 of the second active switch 213 The second reference signal is received, described control unit 215 corresponds to control by controlling first, second active switch 211,213 It makes the output node N and alternately exports first reference signal and second reference signal, to form modulated signal MGND.

In the present embodiment, first reference signal is ground signalling GND, and second reference signal is driving letter Number.Correspondingly, the second transmission end T4 is connect with the voltage generation circuit 27, and the first transmission end T1 with equipment connects It connects, for receiving ground signalling GND, the node N gives modulation ground for exporting the modulated signal MGND.

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

The working principle of the modulation circuit 21 are as follows: in the first period W1, described control unit 215 is for controlling the tune Circuit 21 processed exports modulated signal MGND to the ground in domain 90, and the ground in this time domain 90 is modulation ground；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 the electronic equipment 100 has one and is with ground signalling GND in the first period W1 The reference field 80 of benchmark and a reference field 90 on the basis of modulated signal MGND, for touch display unit 1, due to described While the offer touch driving signal of driving circuit 23 is touched to public electrode 101, further receives and come from the public electrode The touch-sensing signal of 101 output itself, to obtain touch information, therefore, the touch driving circuit 23 is driving the touching The principle touched when display panel 10 executes touch-sensing is self-capacitance touch-sensing principle.

Referring to Figure 2 together, Fig. 3 and Fig. 5, Fig. 5 are the circuit knot of a specific embodiment of the electronic equipment 100 Structure schematic diagram.As previously mentioned, in this embodiment, the touch display unit 1 is said by taking liquid crystal display device as an example It is bright.So, ground is changed, when the touch display unit 1 is other types of display device, the touch display unit 1 Circuit structure can correspond to all differences, in addition, the circuit structure of different liquid crystal display devices can also be not quite similar, but for this The those skilled in the art in field, which can correspond to the structure for deriving learn easily, should all fall into the protection scope of the application.In this embodiment party In formula, the touch display panel 10 of the touch display unit 1 includes multiple pixels 11.Each pixel 11 is in the driving It is used to execute image under the driving of chip 20 to show and touch-sensing.Each pixel 11 includes the public electrode 101, pixel Electrode 103 and control switch 105.The control switch 105 includes coordination electrode G, the first transmission electrode S and the second transmission electricity Pole D.The coordination electrode G and the first transmission electrode S are connect with the driving chip 20.The second transmission electrode D with The pixel electrode 103 connects.The driving chip 20 is for driving the conducting of control switch 105 and cut-off.

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, and the control switch 105 can also be other suitable types Switch.When the control switch 105 is thin film transistor switch, the coordination electrode G is the grid of thin film transistor switch Pole, the first transmission electrode S are the source electrode of thin film transistor switch, and the second transmission electrode D is thin film transistor switch Drain electrode.

In the present embodiment, each pixel 11 respectively includes a pixel electrode 103 and a control switch 105.Due to The generally large size in pixel electrode 103 of the size of public electrode 101, correspondingly, several pixels 11 can share same public affairs Common electrode 101.So, in other change embodiments, a public electrode 101 can also be respectively included for each pixel 11.Separately Outside, display device other types of for OLED etc., each pixel 11 may include the elements such as multiple switch and capacitor.

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

Refresh in general, the driving chip 20 drives the multiple pixel 11 to execute image display by row.At first Section W1, when the driving chip 20, which drives the pixel 11 of certain a line to execute image display, to be refreshed, the driving chip 20 is logical It crosses and provides the first scanning pick-off signal Vg2 to the control switch 105 of the pixel 11 of remaining row, so that the pixel of remaining row The control switch 105 of point 11 is ended, thus, 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 signal of modulated signal MGND.

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

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

Relatively, in the second period W2, the driving chip 20 for example provides the second scanning open signal Vg3 and opens to control 105 are closed, activates control switch 105, and provide the second gray scale voltage Vd2 to pixel electrode by the control switch 105 of activation 103, the second common voltage Vc2, which is provided, to public electrode 101 executes image display refreshing.When the driving chip 20 drive it is a certain When capable pixel 11 executes image display refreshing, the second scanning pick-off signal Vg4 is provided to the control of the pixel 11 of remaining row Switch 105 is made to end, thus, so that the pixel 11 of remaining row is in image and shows hold mode.

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

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

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

The touch display panel 10 can further comprise multi-strip scanning line 281 and multiple data lines 291.It is described a plurality of to sweep It retouches line 281 and the multiple data lines 291 is, for example, the cross arrangement that insulate.The multi-strip scanning line 281 is for example prolonged in X direction It stretches, arranges along Y-direction.The multiple data lines 291 for example extend along Y-direction, arrange in X direction.Every scan line 281 is distinguished Connect the coordination electrode G of the control switch 105 of one-row pixels point 11.Each data line 291 is separately connected a column pixel 11 First transmission electrode S of control switch.

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

The driving chip 20 further comprises display driver circuit 20a.The display driver circuit 20a is for driving institute The execution image of touch display panel 10 is stated to show.The display driver circuit 20a includes scan drive circuit 28, scanning signal production Raw circuit 28a, data drive circuit 29 and the public voltage generating circuit 22.The scan drive circuit 28 connects described Multi-strip scanning line 281.The data drive circuit 29 connects the multiple data lines 291.The scan drive circuit 28 and institute Data drive circuit 29 is stated to connect with the control circuit 25.The control circuit 25 is further used for controlling the scanning drive The scanning sequence of dynamic circuit 28, and corresponding display data are provided to the data drive circuit 29.The scanning signal produces Raw circuit 28a is connect with the scan drive circuit 28.The generation circuit of scanning signals 28a is for generating first scanning Open signal Vg1, the second scanning open signal Vg3, the first scanning pick-off signal Vg2 or the second scanning pick-off signal Vg4, and The first scanning open signal Vg1, the second scanning open signal Vg3, the first scanning pick-off signal Vg2 or second is provided to sweep Pick-off signal Vg4 is retouched to the scan drive circuit 28.The circuit of the scan drive circuit 28 for example including shift register Structure receives scanning open signal and scanning pick-off signal from generation circuit of scanning signals 28a, and in control circuit 25 The lower corresponding scanning open signal and scanning pick-off signal of providing of control is 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, the scan drive circuit 28 corresponding output first scanning under the timing control of control circuit 25 Open signal Vg1, the first scanning pick-off signal Vg2 give corresponding scan line 281 respectively, the data drive circuit 29 by The modulation of the modulated signal MGND of the modulation circuit 21 exports the first gray scale voltage Vd1 to the multiple data lines 291, corresponding pixel electrode 103 is supplied to the control switch 105 by activation and executes image display refreshing.The common electrical 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 Signal on pole 103 and public electrode 101 becomes the signal after the modulated signal MGND synchronous modulation.To described Driving chip 20 is driving the touch display panel 10 to execute in the arbitrary process that normal picture is shown, can drive public affairs simultaneously Common electrode 101 executes touch-sensing.

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

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

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

For liquid crystal display device, the second common voltage Vc2 is typically chosen the relatively described ground signalling GND and is Constant constant voltage signal, for example, (- 1) V.In the first period W1, the modulated signal MGND is, for example, cyclically-varying Signal, frequency is, for example, 200KHZ, amplitude 0.2V, i.e., the first reference signal of modulated signal MGND is 0V, the second reference Signal is 0.2V.Correspondingly, the first common voltage Vc1 is the voltage signal of (- 1) V and the alternating voltage signal of (- 0.8) V The signal of output.

It should be noted that in Fig. 5, modulation circuit 21 is only shown and exports modulated signal MGND to touching driving circuit 23, modulation circuit 21 is omitted and exports modulated signal MGND to the circuits with ground terminal other in domain 90, such as common voltage Generation circuit 22, generation circuit of scanning signals 28a etc., so, those skilled in the art can clearly learn institute according to the above description Stating modulation circuit 21 is to have to export modulated signal MGND to the circuits with ground terminal other in domain 90.

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

In addition, the scan drive circuit 28 for example passes through GIP (Gate In in the embodiment of certain changes Panel) technology is formed on the touch display panel 10, and is not integrated in the driving chip 20.

Similarly, the data selection circuit 24 for example can also be formed in the touch display panel 10 by GIP technology On, and be not integrated in the driving chip 20.

It is referring to Figure 6 together that the decomposition texture of an embodiment of touch display panel 10 shown in Fig. 5 shows with Fig. 7, Fig. 6 It is intended to.Fig. 7 is the schematic diagram of the section structure of touch display panel 10 shown in Fig. 6.The touch display panel 10 includes the first base Plate 106, the second substrate 107, display medium layer 108.The display medium layer 108 in this embodiment so can for liquid crystal layer Change ground, in other embodiments, can correspond to other display mediums.103 He of pixel electrode of the multiple pixel 11 Control switch 105, the multi-strip scanning line 281 and the multiple data lines 291 are arranged in the second substrate 107.Institute State display medium layer 108 and the setting of the multiple public electrode 101 the first substrate 106 and the second substrate 107 it Between.

The first substrate 106 is, for example, transparent insulation substrate with the second substrate 107.The transparent insulation substrate example For example glass substrate, film substrate etc..

The second substrate 107 and the pixel electrode 103 being arranged in the second substrate 107, control switch 105, The multi-strip scanning line 281 and the multiple data lines 291 are often collectively referred to as array (Array) substrate.Relatively, described It is provided with colored filter (not shown) on one substrate 106, to realize that color image is shown.The first substrate 106 and coloured silk Colo(u)r filter is often collectively referred to as colored filter (Color Filter, CF) substrate.The first substrate 106 is back to described The side of two substrates 107 shows and receives touch-sensing for image.So, ground is changed, the colored filter can also be put It sets in the second substrate 107.In some type of display device, the colored filter also be can be omitted, alternative Ground is carried out luminous using the light source of three color of red, green, blue.In addition, for different types of display device, the second substrate 107, which can also be used for image back to the side of the first substrate 106, shows and receives touch-sensing.The touch display panel 10 or be two-sided touch display panel.The present invention is single side touch display panel or two-sided touching to touch display panel 10 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 on the same floor, the multiple pixel electrode 103 is located on the same floor, the two It is stacked.In addition, correspondingly, the liquid crystal display fills since the touch display unit 1 is by taking liquid crystal display device as an example 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 on multiple pixel electrodes 103 by stating, and be respectively whole piece electrode, so, change ground, the multiple pixel electrode Slit is may also set up on 103, to improve edge electric field strength.

Also referring to Fig. 8 and Fig. 9, Fig. 8 is the cross-section structure of another embodiment of touch display panel 10 shown in Fig. 5 Schematic diagram.Fig. 9 is the schematic top plan view of touch display panel 10 shown in Fig. 8.The multiple public electrode 101 may also be arranged on picture Between plain electrode 103 and the second substrate 107.It is laminated and sets between the multiple public electrode 101 and the multiple pixel electrode 103 It sets.It is respectively arranged with slit 103a on the multiple pixel electrode 103, to form fringe field between public electrode 101.? In this embodiment, it can be not provided with slit on the multiple public electrode 101, be respectively whole piece electrode, so, change ground, institute Stating may also set up slit on multiple public electrodes 101, to improve edge electric field strength.

In addition, change ground, the touch display panel 10 can also for plane conversion type (In-Plane Switching, IPS liquid crystal display panel), or, the touch display panel 10 can also be twisted nematic (Twisted Nematic, TN) Liquid crystal display panel, or, the touch display panel 10 be other any suitable types display panel.Wherein, for IPS Liquid crystal display panel, the electric field formed between pixel electrode 103 and public electrode 101 be parallel electric field.

Referring again to Fig. 1 and Fig. 3, the electronic equipment 100 further comprises the main control chip 3.The main control chip 3 It is connect with the touch display unit 1.The main control chip 3 is used to carry out data communication with the touch display unit 1.It is described Main control chip 3 is further used for providing supply voltage to the touch display unit 1.The main control chip 3 can be single Chip is also possible to a chipset.When main control chip 3 is chipset, the chipset includes application processor (Application Processor, AP) and power supply chip.In addition, the chipset can further comprise storage chip.Into one Step ground, the application processor can also be central processing unit (Central Processing Unit, CPU).

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

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

It should be noted that in the first period W1, since the main control chip 3 is located in domain 80, the display driving electricity Road 20a, the circuits such as driving circuit 23 touched be located in domain 90, therefore, main control chip 3 in domain 80 in domain 90 Display driver circuit 20a, the signal transmission 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 between the circuits such as circuit 23 signal transmission 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 10 and Figure 11, Figure 10 Structure block diagram.Described Figure 11 is the structure of an embodiment of a signal processing unit 261 of signal processing circuit 26 shown in Figure 10 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 the digital signal after conversion 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 corresponds to controlling electronic devices 100 according to the signal for indicating touch coordinate and executes phase 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 Fig. 10, for example, A signal processing unit 261 can be shared for multiple operational amplifiers 231, and is not the corresponding difference of each operational amplifier 231 Connect a signal processing unit 261.

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

When the driving chip 20 drives the touch display panel 10 to execute touch-sensing, due between domain 80,90 Ground voltage it is different, therefore, when carrying out signal transmission between the two domains 80,90, need to carry out level conversion to signal, with Meet the pressure-resistant demand of electronic component.Correspondingly, the driving chip 20 can further comprise level conversion unit 264.It is described Level conversion unit 264 is across two domains 80,90.For example, the computing unit 265 is connected by the level conversion unit 264 Connect the main control chip 3.The expression touch coordinate that the level conversion unit 264 is used to export the computing unit 265 After signal carries out level conversion, then the signal after level conversion is exported to the main control chip 3.

Figure 12 is please referred to, Figure 12 is the structural schematic diagram of the another embodiment of the electronic equipment 100.Described touch shows Show that panel 10 can further comprise earth element, the earth element is, for example, to be grounded L1.The ground line L1 is for example arranged Around the multiple pixel 11.So, the earth element is not limited to the ground line L1.In addition, the scanning is driven Dynamic circuit 28 can for example be integrated on the touch display panel 10 (Gate In Panel, GIP), correspondingly, the ground connection member Part can also be the earth element in scan drive circuit 28.The ground line L1 also can be omitted in other embodiments.

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

The ground terminal of each circuit for being located in domain 90 is for example connected to the modulation circuit 21 and first ground connection Between end 201, the ground terminal of each circuit for being located in domain 80 is for example connected to the modulation circuit 21 and connects with described second Between ground terminal 203.

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

The driving chip 20 can further comprise display processing circuit 205.The display processing circuit 205 is connected to institute It states between main control chip 3 and the level conversion unit 264.The level conversion unit 264 further connects with control circuit 25 It connects.The display processing circuit 205 is used to carry out the display data from main control chip 3 respective handling (e.g., store, decompress Contracting, color adjustment etc.).The level conversion unit 264 is arranged between the display processing circuit 205 and control circuit 25, For to the display processing circuit 205 treated display data carry out level conversion, and output level conversion after display Data give the control circuit 25.The control circuit 25 exports corresponding display data and clock signal drives to the display Dynamic circuit 20a.The display driver circuit 20a converts the display data received as gray scale voltage, and is believed according to the timing Number the first period W1 export the first gray scale voltage Vd1 to corresponding pixel electrode 103 execute image display refresh, at second Section W2 exports the second gray scale voltage Vd2 and executes image display refreshing to corresponding pixel electrode 103.The display data are preferably 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 and institute When stating the signal between control circuit 25 and being not required to level conversion, then to the letter between display processing circuit 205 and control circuit 25 It number can be without level conversion, still, in the first period W1, using modulation ground technical solution, due to the voltage in domain 80 and domain 90 Reference data is different, so level conversion need to be done.

In the present embodiment, the division to each circuit module in driving chip 20 or circuit unit in two domains 80,90 Situation are as follows: by display driver circuit 20a, touch driving circuit 23, signal processing circuit 26, data selection circuit 24 and control Circuit 25 is divided in the domain 90 on the basis of MGND, in addition, touch display panel 10 is also divided in domain 90；It will modulation electricity Road 21, display processing circuit 205, voltage generation circuit 27, slope controller 204 are divided in the domain 80 on the basis of GND； Level conversion unit 264 is across two domains, that is, a part is in domain 80, and a part is in domain 90, for the general skill of this field Art personnel, according to the record of the application and circuit theory be can determine level conversion unit 264 be located at domain 80 with The part in domain 90, herein repeats no more this.

Ground is changed, division mode of the present invention to driving chip 20 in above-mentioned two domain 80,90 can also be other suitable The case where, it is not limited to division described in above embodiment.

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

In addition, the amplitude variation of the modulated signal MGND is 0.2V or so, it is normal not influence level conversion unit 264 Work is foundation, need to be according to the type of device of the level of the signal that main control chip 3 is come in and the level conversion unit 264 Variation.

Further, since the voltage of 0.2V is smaller with respect to the voltage of 1.8V, after modulated signals MGND modulation Signal amplitude it is opposite change smaller, therefore, the signal between domain 80 and domain 90 also may be selected without carrying out level conversion, or Person, the level conversion unit 264 can also be for example provided only in domain 80, to the letter exported from the signal processing circuit 26 Number carry out level conversion.

Since voltage signal modulated signals MGND of the touch display panel 10 when executing touch-sensing is integrally same Step system, wherein the driving chip 20 is supplied to public electrode 101 and executes the display drive signals that image is shown, that is, public Voltage, e.g., the second common voltage Vc2 can be suitable for driving public electrode 101 after modulated signal MGND modulation simultaneously Touch-sensing is executed, thus, while guaranteeing that touch display panel 10 executes normal picture display, can further it drive public Electrode 101 executes 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 12, in the present embodiment, in the first period W1, due to a part of the driving chip 20 It is in the domain 80 on the basis of by GND, a part is in the domain 90 on the basis of by MGND, accordingly, it is possible to have in domain 90 Current flowing backwards to domain 80 possibility, in order to prevent this phenomenon, the electronic equipment 100 can further comprise protection circuit 15, The protection circuit 15 is arranged between domain 80 and domain 90.

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

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

The protection circuit 15 can be integrated in the driving chip 20, may also be arranged on except the driving chip 20.

Figure 13 is please referred to, Figure 13 is the electrical block diagram for protecting an embodiment of circuit 15.In present embodiment In, the protection circuit 15 includes diode J1.The anode of the diode J1 connects second source end 207, the diode The cathode of J1 connects the first power end 206.

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

The protection circuit 15 not limits described in embodiment of above, e.g., please refers to Figure 14, Figure 14 is protection circuit 15 Another embodiment electrical block diagram.In order to protect circuit 15 shown in clear difference Figure 13, protected shown in Figure 14 Protection circuit is denoted as 15a.The protection capacitor 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 connection described control unit 153, the first transmission end T5 connection second source end 207, the second transmission end T6 Connect first power end 206.When the modulated signal MGND is driving signal, described control unit 153 controls described Third active switch 151 ends, and the protection circuit 15a is corresponding to disconnect 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 is corresponding to be closed between first power end 206 and the second source end 207 Connection.The third active switch 151 for example thin film transistor (TFT), triode, metal oxide semiconductor field effect tube.

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

Ground is changed, in other embodiments, the modulation circuit 21 can also be by the power supply in driving chip 20 Power supply or reference power source are modulated, to reach all signals progress Integral synchronous modulation to touch display panel 10, and simultaneously It is unrestricted to equipment to be modulated.For example, the modulated terminal M of the modulation circuit 21 is in addition to that can connect or connect as aforementioned first Except ground terminal 201 (when modulating ground), it can also connect or be used as aforementioned first power end 206 (when modulating power supply).When When connecting or being used as first power end 206, the modulation circuit 21 is connected to the first power end 206 and second source end Between 207.First power end 206 is for the first ground terminal 201, and also referred to as power supply end, the two are loaded Voltages keep constant.

In addition, driving chip 20 generally includes other than first power end 206 is with first ground terminal 201 Reference power source end (not shown), when the first power end 206 is for loading the first supply voltage, the first ground terminal 201 for loading When second source voltage, the reference power source end for loading third power supply voltage, the height of the third power supply voltage between Between first supply voltage and the height of second source voltage, wherein first supply voltage and second source voltage Pressure difference keep constant, the pressure difference of first supply voltage and third power supply voltage is kept constant.The reference power source end It can be used as or connect the modulated terminal.That is, one of the power supply end, reference power source end and first ground terminal three person It is used as or connects the modulated terminal, accordingly, the supply voltage for being used as or connecting the modulated terminal includes modulated signal.

Correspondingly, a constant voltage is loaded in the second period W2, the modulated terminal M, the driving chip 20 provides second Gray scale voltage Vd2, to public electrode 101, drives the touch display surface to pixel electrode 103, the second common voltage Vc2 of offer Plate 10 executes image and shows；In the first period W1, the modulated terminal M load-modulate signal, the driving chip 20 provides first Gray scale voltage Vd1, to public electrode 101, drives the touch display surface to pixel electrode 103, the first common voltage Vc1 of offer While plate 10 executes image display, further public electrode 101 is driven to execute self-capacitance touch-sensing.

Figure 15 is please referred to, Figure 15 is the structural schematic diagram of an embodiment of the display processing circuit 205.The display Processing circuit 205 is for example including storage circuit 2051, decompression circuit 2053 and color regulation circuit 2055.The storage electricity Road 2051, decompression circuit 2053, color regulation circuit 2055 are sequentially connected and connect.The storage circuit 2051 further connects institute State main control chip 3.The color regulation circuit 2055 further connects the control circuit 25 by level conversion unit 264.

The storage circuit 2051 is used to receive the display data from main control chip 3, and to the display data received It is stored.The decompression circuit 2053 exports compression for unziping it to the display data from main control chip 3 Display data afterwards are to color regulation circuit 2055.The color regulation circuit 2055 carries out color tune to display data are received It is whole, for example, carrying out color enhancement processing etc. to display data, and the display data after output adjustment are to level conversion unit 264. After the level conversion unit 264 carries out level conversion to the display data received, and the display number after output level conversion According to control circuit 25.

The control circuit 25 exports corresponding display data and clock signal to data drive circuit 29, and further Output timing signal is to scan drive circuit 28.The scan drive circuit 28 is answered according to the clock signal, corresponding output phase Scanning open signal to scan line 281.The data drive circuit 29 converts the display data received as gray scale voltage, and Corresponding gray scale voltage is exported to corresponding data line 291 according to clock signal, is refreshed with executing image display.

It should be noted that the display processing circuit 205 is not limited to include circuit described herein, can also not have Some of them circuit further comprises other circuits.

In addition, can also reduce or increase in the touch display unit 1 and electronic equipment 100 of embodiment each for the application Add certain elements or combinational circuit etc., for those of ordinary skill in the art, as long as passing through common knowledge, existing skill Art and the technical solution for combining the technology contents of the application that can rationally derive should all fall into the protection scope of the application.

Further, due to the modulation circuit 21, display processing circuit 205, touch driving circuit 23, display driving electricity The circuits such as road 20a, control circuit 25 and level conversion unit 264 are all integrated in single driving chip 20, and single chip Space is saved compared to multiple chips, therefore, the space that the touch display unit 1 accounts for the electronic equipment 100 is smaller.Separately Outside, single chip is more advantageous to the assembling and production management of touch display unit 1 compared to multiple chips, improves production effect Rate, thus, reduce the manufacturing cost of the electronic equipment 100.

Above each embodiment is so that the driving chip 20 driving public electrode 101 executes self-capacitance touch-sensing as an example It is illustrated, so, the application is not limited thereto, as long as being changed based on same or similar idea to touch display unit Into the protection scope of the application should all be fallen in.

In addition to the multiplexing public electrode of above-mentioned introduction does each embodiment of self-capacitance touch-sensing, the application can also lead to It crosses and one layer of touch-sensing electrode is additionally set to execute touch-sensing, these embodiments are also all feasible.

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

Claims

1. a kind of touch display unit, comprising:

Touch display panel；With

Driving chip, comprising:

Modulation circuit, for generating a modulated signal；With

By being exported using driving chip described in the modulated signal synchronous modulation to the voltage signal of the touch display panel, Driving the touch display panel to execute, image display is kept the driving chip or/and image is shown during refreshing, The touch display panel is further driven to execute touch-sensing.

2. touch display unit as described in claim 1, it is characterised in that: the touch display panel includes multiple common electricals Pole, the touch driving circuit touches driving signal to each public electrode for providing, and receives and export from each public electrode Touch-sensing signal.

3. touch display unit as claimed in claim 2, it is characterised in that: the touch driving circuit drives institute for timesharing It states multiple public electrodes and executes self-capacitance touch-sensing.

4. touch display unit as claimed in claim 3, it is characterised in that: the driving chip further comprises common voltage Generation circuit, it is described public when the touch driving circuit provides the touch driving signal to part public electrode every time Voltage generation circuit then provides the first common voltage and gives remaining public electrode, wherein the touch driving signal and described the One common voltage is same voltage signal through the modulated signal of the modulated signal.

5. touch display unit as claimed in claim 4, it is characterised in that: the touch driving circuit and the common voltage The circuit structure of generation circuit is different.

6. touch display unit as claimed in claim 4, it is characterised in that: by utilizing the modulated signal synchronous modulation institute It states driving chip to export to all voltage signals of the touch display panel, the driving chip is driving the touch display During panel executes image display holding or/and image display refreshing, further timesharing drives the multiple public electrode Execute self-capacitance touch-sensing.

7. touch display unit as claimed in claim 6, it is characterised in that: the touch driving circuit and the common voltage Generation circuit passes through a data selection circuit respectively and connect with the multiple public electrode alternative.

8. touch display unit as claimed in claim 7, it is characterised in that: the data selection circuit is formed in the touch On display panel, or it is integrated in the driving chip.

9. touch display unit as claimed in claim 7, it is characterised in that: the driving chip further comprises the first ground connection End and the second ground terminal, the modulation circuit are connected between first ground terminal and second ground terminal, wherein described For second ground terminal for connecting an equipment, receiving a ground signalling, the modulation circuit is high according to the ground signalling and one The modulated signal is generated in the driving signal of the ground signalling, and exports the modulated signal to first ground terminal, Wherein, the driving chip exports the voltage signal to the touch display panel with the voltage letter on first ground terminal On the basis of number.

10. touch display unit as claimed in claim 9, it is characterised in that: the modulation circuit is for described in timesharing output Modulated signal and the ground signalling give first ground terminal；When the modulation circuit exports the ground signalling to described the When one ground terminal, the public voltage generating circuit is electrically connected by the data selection circuit with the multiple public electrode respectively It connects.

11. touch display unit as claimed in claim 10, it is characterised in that: when the modulation circuit exports the modulation letter When number giving first ground terminal, in synchronization, the touchs driving circuit passes through the data selection circuit and part public affairs Common electrode electrical connection, the public voltage generating circuit are electrically connected by the data selection circuit with remaining public electrode.

12. touch display unit as claimed in claim 9, it is characterised in that: the touch display panel further comprises more A pixel electrode and display medium layer, are used to form fringe field between the multiple pixel electrode and the multiple public electrode Or parallel electric field, wherein the multiple pixel electrode is located on the same floor, and is arranged in two-dimensional array, the multiple public electrode position In same layer, arrange in two-dimensional array.

13. touch display unit as claimed in claim 12, it is characterised in that: when the modulation circuit exports the modulation letter Number give first ground terminal when, the driving chip successively provide the first gray scale voltage give each row pixel electrode, the touching It touches driving circuit and provides touch driving signal every time to a line or the public electrode of multirow, the public voltage generating circuit provides First common voltage gives remaining public electrode.

14. touch display unit as claimed in claim 13, it is characterised in that: in synchronization, receive from the drive Non-overlap between the pixel electrode of first gray scale voltage of dynamic chip output and the public electrode for receiving touch driving signal.

15. the touch display unit as described in any one of claim 9-14, it is characterised in that: the driving chip is into one Step includes multiple signal processing circuits, and the multiple signal processing circuit is connect with the touch driving circuit, at the signal Reason circuit is used to obtain touching position information according to the touch-sensing signal that the touch driving circuit receives, wherein described Voltage signal in signal processing circuit is on the basis of the voltage signal on first ground terminal.

16. touch display unit as claimed in claim 15, it is characterised in that: the touch driving circuit include signal source and Multiple operational amplifiers, wherein the operational amplifier includes the second amplifier and feedback branch, and second amplifier includes In-phase end, reverse side and output end；The feedback branch is connected between the reverse side and output end of second amplifier； The output end of second amplifier is further connect with the signal processing circuit, and the in-phase end of the second amplifier connects the signal Source, the reverse side of the second amplifier further connect the data selection circuit；The signal processing circuit includes analog to digital Converting unit and computing unit, the analog-digital conversion unit are connected to the computing unit and second amplifier Between output end.

17. touch display unit as claimed in claim 16, it is characterised in that: the public voltage generating circuit and the touching It touches driving circuit and shares the signal source, the public voltage generating circuit further comprises follower and voltage regulator circuit, described Follower is connected between the signal source and the data selection circuit, and one end of the voltage regulator circuit and the follower connect It connects, the other end is connect with the first ground terminal.

18. touch display unit as claimed in claim 15, it is characterised in that: the driving chip further comprises at display Managing circuit, display driver circuit and level conversion unit, the display driver circuit includes the public voltage generating circuit, The display processing circuit is used to receive the display data from a main control chip, the display data received are stored, Decompression and color adjustment, and display data adjusted are provided to the level conversion unit, the level conversion unit Level conversion is carried out to the display data received, and the display data after output level conversion give the display driver circuit, The display driver circuit drives the touch display panel to show corresponding image according to the display data received are corresponding；Institute It states level conversion unit and level conversion further is carried out to the touching position information exported from signal processing circuit, and provide and turn Signal after changing gives the main control chip.

19. touch display unit as described in claim 1, it is characterised in that: the rangeability of the modulated signal is Between 0.15 volt to 0.3 volt.

20. touch display unit as described in claim 1, it is characterised in that: the amplitude of the modulated signal is 0.2 volt.

21. touch display unit as described in claim 1, it is characterised in that: the modulated signal is periodically variable side Wave signal, the square-wave signal include the first reference signal and the second reference signal being alternately present, wherein the first reference signal Level be lower than the level of the second reference signal, duration of every one first reference signal is greater than or equal to every one second reference The duration of signal.

22. touch display unit as claimed in claim 21, it is characterised in that: the duration of first reference signal is Twice of the duration of second reference signal.

23. a kind of electronic equipment, including touch display unit described in any one of claim 1-22.