WO2018058652A1 - 具有触摸功能的液晶显示装置和电子设备 - Google Patents

具有触摸功能的液晶显示装置和电子设备 Download PDF

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Publication number
WO2018058652A1
WO2018058652A1 PCT/CN2016/101344 CN2016101344W WO2018058652A1 WO 2018058652 A1 WO2018058652 A1 WO 2018058652A1 CN 2016101344 W CN2016101344 W CN 2016101344W WO 2018058652 A1 WO2018058652 A1 WO 2018058652A1
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WIPO (PCT)
Prior art keywords
signal
circuit
touch
common
liquid crystal
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PCT/CN2016/101344
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English (en)
French (fr)
Inventor
林峰
Original Assignee
深圳深微创芯科技有限公司
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Application filed by 深圳深微创芯科技有限公司 filed Critical 深圳深微创芯科技有限公司
Priority to PCT/CN2016/101344 priority Critical patent/WO2018058652A1/zh
Priority to CN201690000416.6U priority patent/CN209496359U/zh
Publication of WO2018058652A1 publication Critical patent/WO2018058652A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods

Definitions

  • the present invention relates to the field of touch display technologies, and in particular, to a liquid crystal display device having a touch function and an electronic device having the liquid crystal display device.
  • touch display devices include three types of touch display panels: an external type, an On-Cell (in-box type), an In-Cell (in-box type or in-line type).
  • an external type an On-Cell (in-box type)
  • an In-Cell in-box type or in-line type.
  • the touch display device is exemplified as a liquid crystal display device.
  • the liquid crystal display device includes a liquid crystal display panel and a driving circuit for driving the liquid crystal display panel to perform image display and touch sensing.
  • the liquid crystal display panel includes a plurality of scan lines, a plurality of data lines, and a plurality of transistors, a plurality of pixel electrodes, and a plurality of common electrodes.
  • Each transistor includes a gate, a source, and a drain. Wherein, the gate is connected to the scan line, the source is connected to the data line, and the drain is connected to the pixel electrode.
  • the driving circuit is configured to provide a scan signal to the scan line, activate a transistor connected to the scan line, provide a gray scale voltage to the pixel electrode through the data line and the activated transistor, and provide a common voltage to the common electrode to drive the liquid crystal display
  • the panel performs an image display refresh.
  • the driving circuit supplies the scan signal to a scan line
  • the gray scale voltage is transmitted to a row of pixel electrodes connected to the scan line, and a time gap before the scan signal is supplied to another scan line Called the line gap.
  • the time gap before providing the gray scale voltage to the other row of pixel electrodes is a line gap.
  • the driving circuit supplies one frame gray scale voltage to all the pixel electrodes
  • the time gap before providing another frame gray scale voltage to all the pixel electrodes may also be referred to as a frame gap.
  • there is no transmission of the gray scale voltage that is, no image display refresh, and accordingly, at this time, the liquid crystal display panel is in the state of image display holding.
  • Existing liquid crystal display devices generally employ touch sensing on a touch sensing electrode at a line gap.
  • the touch sensing electrodes are, for example, multiplexed common electrodes.
  • the driving circuit typically provides a touch driving signal different from the common voltage to perform touch sensing to the common electrode.
  • the common voltage is a constant voltage signal with respect to the ground signal GND (for example, 0 volts)
  • the touch drive signal is a square wave pulse signal having a predetermined frequency with respect to the ground signal GND to improve Touch the signal to noise ratio of the sensing signal. It can be seen that the liquid crystal display device performs image display refresh and touch sensing in a time-sharing manner, thereby reducing the mutual influence between image display and touch sensing to some extent.
  • the resolution of the liquid crystal display device is gradually increased, for example, the resolution of the liquid crystal display device of the mobile phone gradually adopts a resolution of 2K (eg, 2560 ⁇ 1440), or even higher resolution, and the display refresh frequency is generally adopted. 60HZ, The line gap and the frame gap are obviously compressed. If the touch sensing is performed on the touch sensing electrodes only in the line gap or the frame gap, the touch sensing may not be sufficiently performed due to insufficient time. When the refresh rate is increased to 120 Hz, less time is available for touch sensing.
  • the present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention needs to provide a liquid crystal display device and an electronic device having a touch function.
  • the invention provides a liquid crystal display device with a touch function, comprising:
  • each of the control switches including a control electrode, a first transfer electrode, and a second transfer electrode, wherein the control electrode is connected to the scan line, and the first transfer electrode is connected to the data line
  • the second transfer electrode is connected to the pixel electrode;
  • a driving circuit that activates a control switch connected to the scan line by providing a first scan enable signal to the scan line, and provides a first gray scale voltage to the pixel electrode through the data line and the activated control switch, and provides the same first common And applying a voltage to the plurality of common electrodes to drive the liquid crystal display panel to simultaneously perform image display refresh and touch sensing;
  • the first scan enable signal, the first gray scale voltage, and the first common voltage are signals that are synchronously modulated by a modulated signal, and the driving circuit provides the first common voltage to the plurality of public
  • the electrode drives the common electrode to perform touch display while driving the plurality of common electrodes to perform image display.
  • the first common voltage remains unchanged with respect to the modulation signal.
  • the driving part common electrode performs touch sensing.
  • the driving circuit is configured to drive the plurality of common electrodes to perform self-capacitive touch sensing.
  • signals on the liquid crystal display panel are signals synchronously modulated by the modulation signal.
  • the driving circuit includes a modulation circuit and a first ground end, and the modulation circuit is configured to generate the modulation signal, when the modulation circuit outputs the modulation signal to the first ground end,
  • the signals on the liquid crystal display panel are signals that are synchronously modulated by the modulated signal.
  • the driving circuit outputs the modulation signal to the first ground end by controlling the modulation circuit, and synchronously modulates all signals of the liquid crystal display panel by using the modulation signal, and is driven by the first common voltage Common electrode Self-capacitive touch sensing is performed to drive the liquid crystal display panel while performing image display refresh and touch sensing.
  • the driving circuit simultaneously supplies the same first common voltage to the plurality of common electrodes, and receives the touch sensing signals from the plurality of common electrode outputs in time to acquire touch information, where
  • the driving circuit drives the common electrode to perform a touch sensing first common voltage while serving as a display driving signal and a touch driving signal.
  • the driving circuit includes a touch driving circuit, a common voltage generating circuit, and a data selecting circuit; the touch driving circuit is selectively connectable to the plurality of common electrodes by the data selecting circuit, the common voltage a generating circuit selectively connectable to the plurality of common electrodes through the data selection circuit; wherein the common voltage generating circuit is configured to drive the plurality of common electrodes to perform image display, and the touch driving circuit is used to drive the The plurality of common electrodes perform image display and self-capacitive touch sensing.
  • the driving circuit drives the liquid crystal display panel while performing image display refreshing and self-capacitive touch sensing
  • the first common voltages received by the plurality of common electrodes are respectively generated from the common voltage a circuit and the touch drive circuit.
  • the common voltage generating circuit includes:
  • a signal source includes a ground end and an output end, wherein the ground end is connected to the first ground end;
  • the first amplifier includes a third power terminal, a third ground terminal, a first non-inverting terminal, a first inverting terminal, and a first output terminal, wherein the third power terminal is configured to load a power voltage, a third ground end connected to the first ground end, the first in-phase end is connected to an output end of the signal source, and the first inverting end is connected to the first output end, the first output end For selective connection to a common electrode through a data selection circuit; and
  • the voltage stabilizing capacitor comprises an opposite first plate and a second plate, wherein the first plate is connected between the data selection circuit and the first output end, and the second plate is connected to the first ground.
  • the touch driving circuit includes:
  • the signal source and
  • each operational amplifier comprising a second amplifier and a feedback branch; each second amplifier comprising a fourth power terminal, a fourth ground terminal, a second non-inverting terminal, a second inverting terminal, and a second output terminal
  • the fourth power terminal is configured to load a power voltage
  • the fourth ground terminal is connected to the first ground terminal
  • the second in-phase terminal is connected to an output end of the signal source
  • the second The phase end is coupled to the second output through a feedback branch
  • the second inverting terminal is further selectively connectable to the common electrode through a data selection circuit.
  • the driving circuit further includes a signal processing circuit
  • the second output terminal is further connected to the signal processing circuit
  • the signal processing circuit is configured to receive a touch sensing signal from the output of the touch driving circuit to obtain a touch. information.
  • the plurality of pixel electrodes and the plurality of common electrodes are arranged in a two-dimensional array.
  • the driving circuit drives the liquid crystal display panel while performing image display refreshing and self-capacitive touch sensing
  • a plurality of lines between the pixel electrode facing the common electrode performing touch sensing and the pixel electrode performing image display refreshing are in image display A pixel electrode that remains in a state.
  • the driving circuit is further configured to activate a control switch connected to the scan line by providing a second scan enable signal to the scan line, and provide a second gray scale voltage to the pixel electrode through the data line and the activated control switch And providing a second common voltage to the common electrode to drive the liquid crystal display panel to perform an image display refresh instead of simultaneously performing touch sensing.
  • the second scan-on signal is a signal that is modulated by the modulation signal by the first scan-on signal, and the first common voltage is modulated by the second common voltage by the modulation signal. signal.
  • defining a period in which the common electrode performs touch sensing is a first time period
  • defining a time period in which the plurality of common electrodes perform image display instead of simultaneously performing touch sensing is a second time period, where the first time period is The second period of time is alternately performed;
  • the signals outputted by the driving circuit to the liquid crystal display panel are all based on a signal on the first ground end as a voltage reference reference; in the first period, the modulation circuit output station The modulation signal is applied to the first ground terminal; in the second period, the modulation circuit outputs a ground signal to the first ground terminal.
  • the output end of the signal source outputs the same first reference voltage signal as the first common voltage to the first One phase and the second phase.
  • the present invention also provides an electronic device comprising the liquid crystal display device of any one of the above.
  • the driving circuit can drive the liquid crystal display panel while performing image display refresh and touch sensing, the time during which the liquid crystal display device performs touch sensing is relatively long. Accordingly, the user experience of the electronic device having the liquid crystal display device is good.
  • FIG. 1 is a schematic diagram showing the structure of an electronic device of the present invention.
  • FIG. 2 is a waveform diagram of an embodiment of a partial signal of the electronic device shown in FIG. 1.
  • FIG. 3 is a schematic diagram showing the circuit structure of an embodiment of the electronic device shown in FIG. 1.
  • FIG. 3 is a schematic diagram showing the circuit structure of an embodiment of the electronic device shown in FIG. 1.
  • FIG. 4 is a schematic diagram showing the circuit structure of an embodiment of the modulation circuit shown in FIG.
  • FIG. 5 is a schematic diagram showing the circuit structure of a signal source of a conventional touch driving circuit.
  • FIG. 6 is a schematic diagram showing the circuit structure of a signal source of the touch driving circuit shown in FIG. 3.
  • FIG. 7 is a schematic structural diagram of a circuit of an embodiment of the electronic device shown in FIG. 1.
  • FIG. 7 is a schematic structural diagram of a circuit of an embodiment of the electronic device shown in FIG. 1.
  • FIG. 8 is an exploded perspective view of an embodiment of the touch display panel of FIG. 7.
  • FIG. 8 is an exploded perspective view of an embodiment of the touch display panel of FIG. 7.
  • FIG. 9 is a cross-sectional structural view of the touch display panel of FIG. 8.
  • FIG. 10 is a cross-sectional structural view showing another embodiment of the touch display panel shown in FIG. 7.
  • FIG. 10 is a cross-sectional structural view showing another embodiment of the touch display panel shown in FIG. 7.
  • FIG. 11 is a top plan view of the touch display panel of FIG. 10.
  • Figure 12 is a block diagram showing the structure of an embodiment of the signal processing circuit shown in Figure 3.
  • FIG. 13 is a block diagram showing an embodiment of a signal processing unit of the signal processing circuit shown in FIG.
  • FIG. 14 is a schematic structural view of still another embodiment of an electronic device according to the present invention.
  • FIG. 15 is a schematic diagram showing the circuit structure of an embodiment of the protection circuit shown in FIG. 14.
  • 16 is a schematic diagram showing the circuit structure of another embodiment of a protection circuit.
  • a plurality includes two or more, “multiple” includes two or more, and “multiple” includes two and two or more, “multiple”
  • the row includes two rows and two or more rows, and the “multiple columns” includes two columns and two or more columns unless otherwise specifically defined by the present application.
  • the words “first”, “second”, “third”, “fourth” and the like appearing in each component name and signal name are not intended to limit the order in which the components or signals appear, but to facilitate the naming of the components. Clearly distinguish the components to make the description more concise and understandable. In order to avoid confusion, some further explanations are needed:
  • the display device includes a display panel and a drive circuit.
  • the driving circuit is configured to drive the display panel to perform image display.
  • the display panel generally includes a plurality of pixel points, each of the pixel points includes a first electrode and a second electrode.
  • a pressure difference between the first electrode and the second electrode determines a display gray level of the pixel point. level.
  • the first electrodes of the plurality of pixel points are, for example, a structure that is integrally connected to each other, and is an entire layer of electrodes, and the plurality of pixels are
  • the second electrodes are structures that are separate from each other.
  • the driving circuit provides different voltages to the second electrodes of the respective pixel points by supplying the same voltage to the first electrodes of the respective pixel points (for example, 0 volts), thereby realizing image display of different gray levels. .
  • the first electrode is a common electrode
  • the second electrode is a pixel electrode.
  • the driving circuit drives the liquid crystal display panel to perform image display by supplying a common voltage to the first electrode, supplying a gray scale voltage to the second electrode.
  • the display device may be other suitable types of display devices, such as electronic paper display devices and the like.
  • its image display state generally includes an image display refresh state and an image display hold state.
  • the driving circuit supplies a gray scale voltage to the second electrode and supplies a common voltage to the first electrode
  • the pixel starts to perform image display refresh, when the gray scale voltage is written to the first
  • the supply of the gray scale voltage to the second electrode is stopped, and the image display refresh is completed.
  • the pixel enters the image display hold state until the pixel point receives the gray scale voltage next time.
  • the process of image display refreshing may further include pre-charging or pre-discharging the second electrode, and providing a grayscale voltage of the predetermined grayscale picture to the second electrode when the second electrode of the same row reaches the same voltage.
  • the second electrode has a process of writing the gray scale voltage.
  • the plurality of pixel points are arranged, for example, in a matrix.
  • the drive circuit typically performs an image display refresh on a row-by-row or row-by-row basis.
  • image display refresh and the image display maintain these two different display states in order to better understand the various embodiments of the present invention described below.
  • image display refresh and “image display hold” are two different technical concepts.
  • the specific names of the first electrode and the second electrode in different types of display devices are different.
  • the first electrode is collectively referred to as a common electrode.
  • the second electrode is a pixel electrode.
  • the display voltage signal supplied to the first electrode by the driving circuit is a common voltage
  • the display voltage signal supplied to the second electrode is a gray scale voltage.
  • Touch screens generally include resistive, capacitive, infrared, and other types of touch screens, of which capacitive touch screens are more widely used.
  • the capacitive touch screen includes a mutual capacitive touch screen and a self-capacitive touch screen.
  • the touch screen may include, for example, a driving area and a sensing area such as a driving line and a sensing line.
  • the drive lines may form multiple rows, while the sense lines may form multiple columns (eg, orthogonal).
  • Touch pixels can be placed at the intersection of rows and columns.
  • the rows may be energized with an alternating current (AC) waveform, and mutual capacitance may be formed between the rows and columns of the touch pixels.
  • AC alternating current
  • some of the charge coupled between the rows and columns of the touch pixel can instead be coupled to the object.
  • This reduction in charge coupled to the touch pixel can result in a net decrease in mutual capacitance between the rows and columns and a decrease in the AC waveform coupled to the touch pixel.
  • This subtraction of the charge coupled AC waveform Less can be detected and measured by the touch system to determine the location of the object as it touches the touch screen.
  • each touch pixel can be formed by an individual electrode that forms a self-capacitance to ground.
  • another capacitance to ground may be formed between the object and the touch pixel.
  • the other pair of ground capacitances can result in a net increase in self-capacitance experienced by the touch pixel.
  • This self-capacitance increase can be detected and measured by the touch system to determine the location of the object as it touches the touch screen.
  • FIG. 1 is a schematic diagram showing the structure of an electronic device according to the present invention.
  • 2 is a waveform diagram of an embodiment of a partial signal of the electronic device shown in FIG. 1.
  • the electronic device 100 is a variety of suitable types of products, such as a portable electronic product, a smart home electronic product, and an in-vehicle electronic product.
  • the present invention is not limited thereto.
  • the portable electronic product is, for example, a mobile phone, a tablet computer, a notebook computer, a wearable device, or the like.
  • the smart home electronic product is, for example, a desktop computer, a refrigerator, a washing machine, a television, or the like.
  • the in-vehicle electronic products are, for example, navigators, car DVDs, and the like.
  • the electronic device 100 includes a touch display device 1.
  • the touch display device 1 is used to implement image display and touch sensing.
  • the touch display device 1 is an In-Cell (in-box type or in-line type) touch display device.
  • the display device in the touch display device 1 is, for example, a liquid crystal display device. Accordingly, the touch display device 1 is a touch liquid crystal display device.
  • the display device in the touch display device 1 may be other suitable types of display devices, such as an electronic paper display device (EPD) or the like.
  • EPD electronic paper display device
  • the touch display device 1 includes a touch display panel 10 and a drive circuit 20.
  • the touch display panel 10 includes a plurality of common electrodes 101.
  • the plurality of common electrodes 101 function as display electrodes and touch sensing electrodes.
  • the driving circuit 20 and the plurality of common electrodes 101 are respectively connected to drive the plurality of common electrodes 101 to perform image display, and are also used to drive the plurality of common electrodes 101 to perform touch sensing.
  • the driving circuit 20 is configured to drive the plurality of common electrodes 101 to perform self-capacitance touch sensing.
  • the present invention is not limited thereto, and the driving circuit 20 may also be used to drive the plurality of common electrodes 101 to perform other suitable types of touch sensing, such as mutual capacitance touch sensing, as long as it is based on the present disclosure.
  • touch sensing such as mutual capacitance touch sensing
  • Other changes or extensions made by the technical idea are intended to fall within the scope of this application.
  • the plurality of common electrodes 101 are arranged, for example, in a two-dimensional array. Specifically, the plurality of common electrodes 101 are arranged in a plurality of rows and columns in the X direction and the Y direction, wherein the X direction is a row direction. The Y direction is the column direction. However, in other embodiments, the plurality of common electrodes 101 may also be arranged in other regular or irregular manners, which is not limited by the present invention.
  • the driving circuit 20 is configured to further drive the common electrode 101 to perform self-capacitance touch sensing in any process of driving the touch display panel 10 to perform image display. Therefore, even when the display resolution of the touch display device 1 is improved, the time of touch sensing is not shortened, and further, the technical bottleneck of insufficient touch sensing time due to an increase in display resolution is broken. Accordingly, the user experience of the electronic device 100 is better.
  • the drive circuit 20 may further drive the common electrode 101 to perform self-capacitance touch sensing while driving the touch display panel 10 to perform image display refresh.
  • the touch sensing of the touch display device 1 is not limited to between rows The gap I and the frame gap are performed.
  • all electrical signals on the touch display panel 10 are signals modulated by a modulation signal MGND.
  • Each of the electrical signals on the touch display panel 10 rises, for example, as the modulation signal MGND rises, and decreases as the modulation signal MGND decreases.
  • the driving circuit 20 further drives the plurality of common electrodes 101 to perform, for example, by synchronously modulating all the signals of the touch display panel 10 by using the modulation signal MGND to drive the touch display panel 10 to perform image display. Capacitive touch sensing.
  • elements on the touch display panel 10 are either directly driven by the drive circuit 20 or indirectly driven by the drive circuit 20.
  • the signal on the element is a signal modulated by the modulated signal MGND output from the driving circuit 20;
  • the element is not directly driven by the driving circuit 20, it is indirectly driven by the driving circuit 20, for example, by capacitive coupling, and the capacitive coupling exists between the element directly driven by the driving circuit 20 and the element driven indirectly by the driving circuit 20.
  • the signal of the component is superimposed by the modulation signal MGND due to capacitive coupling.
  • all electrical signals on the touch display panel 10 are signals modulated by the modulation signal MGND.
  • elements in the touch display panel 10 can also be indirectly driven by the drive circuit 20, for example, by components such as resistors.
  • all the electrical signals on the touch display panel 10 may also be modulated signals output from the driving circuit 20.
  • the driving circuit 20 may further drive the common electrode 101 to perform self-capacitance touch sensing while providing the same first common voltage Vc1 to the plurality of common electrodes 101 for image display.
  • the first common voltage Vc1 is a signal modulated by the modulation signal MGND. For example, the voltage difference between the first common voltage Vc1 and the modulation signal MGND remains unchanged. The first common voltage Vc1 remains unchanged with respect to the modulation signal MGND. However, the first common voltage Vc1 may also be a signal that changes relatively with a voltage difference between the modulation signal Vc1. Preferably, the first common voltage Vc1 is a signal that changes with respect to the ground signal GND.
  • the ground signal GND is, for example, a constant voltage signal of 0 V (volts), but is not limited to a constant voltage signal of 0 V, and may be a constant voltage signal close to 0 V, which is usually on the ground of the device of the electronic device 100. Voltage signal.
  • the device is also referred to as a system, for example, a negative pole of a power supply of the electronic device 100, and the power supply is a battery.
  • the ground signal GND is also referred to as a system ground voltage, a system ground signal, a device ground voltage, or a device ground signal.
  • the device is not earthy or absolutely earthy. However, when the electronic device 100 is connected to the earth through a conductor, the device ground may also be the earth's earth.
  • the driving circuit 20 drives the common electrode 101 while performing image display and touch sensing
  • the first common voltage Vc1 supplied to the common electrode 101 is simultaneously used as a display driving signal and a touch driving.
  • a signal when the driving circuit 20 drives the common electrode 101 to perform image display instead of simultaneously performing touch sensing,
  • the first common voltage 101 of the common electrode 101 serves as a display driving signal instead of being used as a touch driving signal at the same time.
  • the driving circuit 20 may drive the plurality of common electrodes 101 to perform touch sensing in a time division manner, and may also drive the plurality of common electrodes 101 to simultaneously perform touch sensing.
  • the driving circuit 20 drives the plurality of common electrodes 101 while performing touch sensing
  • the first common voltage Vc1 supplied to the plurality of common electrodes 101 is simultaneously used as a touch driving signal;
  • the driving circuit 20 drives the plurality of common electrodes 101 to perform touch sensing in a time division manner
  • the first common voltages Vc1 supplied to the plurality of common electrodes 101 are not all used as touch driving signals at the same time. Therefore, the first common voltage Vc1 that the driving circuit 20 drives the common electrode 101 to perform touch sensing may also be referred to as a touch driving signal.
  • the driving circuit 20 drives the plurality of common electrodes 101 to perform touch sensing in a time division manner, although the driving circuit 20 supplies the same first common voltage Vc1 to the plurality of common electrodes 101, the driving circuit The circuit structure in which the common electrode 101 is driven to perform image display and touch sensing at the same time is different from the circuit structure in which the driving common electrode 101 performs image display instead of simultaneously performing touch sensing.
  • the modulated display driving signals among all the electrical signals can drive the touch display panel 10 to perform a normal image.
  • the display and the modulated display driving signal for example, the first common voltage Vc1
  • the drive circuit 20 can drive the touch display panel 10 to perform touch sensing in any process of driving the touch display panel 10 to perform image display, and the touch sensing does not affect the normal display of the image. Further, even when the display resolution of the touch display device 1 is increased, the time of the touch sensing is not shortened, thereby improving the user experience of the electronic device 100.
  • the signals on the common electrode 101 and the pixel electrode 103 of the pixel 11 are subjected to the modulation signal MGND.
  • the display voltage difference does not change, the image is normally displayed, and the first common voltage Vc1 supplied to the common electrode 101 is a signal modulated by the modulation signal MGND, and the first common voltage Vc1 is relative to the ground signal.
  • GND is a varying signal, so that the common electrode 101 can be simultaneously driven to perform self-capacitance touch sensing while ensuring that the touch display panel 10 normally displays an image.
  • the signal on the pixel electrode 103 of the pixel point 11 performing the image display refresh is the modulated signal supplied from the drive circuit 20, and is executed.
  • the image shows that the signal on the pixel electrode 103 of the held pixel point 11 is superimposed by the modulation signal MGND due to capacitive coupling.
  • the touch display device 1 is, for example, various types of display devices such as a high definition (HD) display device, a full high definition (FHD) display device, and an ultra high definition (UHD) display device, and correspondingly, the display resolution is, for example, 1280 ⁇ 720, 1920 ⁇ 1080, 3840x2160.
  • the display resolution is not limited thereto.
  • 2K may be 1920x1080, or may be 2560X1440 or the like.
  • the display resolution is 4K, 8K, a plurality of situations may also be included.
  • the touch display device 1 it is possible to perform at the same time in any process of image display. Line touch sensing, and touch sensing does not affect normal image display. That is, the touch display device 1 can simultaneously perform image display and self-capacitive touch sensing.
  • the driving circuit 20 can drive the common electrode 101 to perform self-capacitance touch sensing together to acquire touch information.
  • the image display refresh and the self-capacitive touch sensing can coexist at the same time, and the image display and the touch sensing quality of the touch display device 1 are high.
  • the touch display device 1 can Image display refresh and self-capacitive touch sensing are simultaneously performed, and there is no interference or interference between the image display and the touch sensing of the touch display device 1.
  • the driving circuit 20 when the touch display panel 10 is in a state of non-image display refresh under the driving of the driving circuit 20, for example, a line gap I (shown in FIG. 2) and a frame gap, the driving circuit 20 also The self-capacitive touch sensing can be performed by driving the common electrode 101 together. At this time, the touch display panel 10 is entirely in the state of image display hold, and since the signal output from the drive circuit 20 to the touch display panel 10 is synchronously modulated by the modulation signal MGND, the touch sensing is not changed. The display voltage difference between the two electrodes 101, 103 of the pixel 11 (see FIG. 7), correspondingly, the image display of the touch display panel 10 and the quality of the touch sensing are better.
  • the driving circuit 20 can drive the common electrode 101 to perform touch sensing together in any process of driving the touch display panel 10 to perform image display, the manufacturer can set the driving circuit 20 to drive the public according to needs.
  • the electrode 101 performs a period of touch sensing. Specifically, for example, touch sensing is performed during the entire process or part of the image display. More specifically, for example, during image display refresh and/or line gap I, frame gap, touch sensing is performed, and the like.
  • the driving circuit 20 simultaneously drives the plurality of common electrodes 101 to perform image display, and time-divisionally drives the plurality of common electrodes 101 to perform self-capacitive touch sensing.
  • the driving circuit 20 drives the plurality of common electrodes 101 to perform self-capacitance touch sensing.
  • the driving circuit 20 may simultaneously drive the partial common electrodes 101 to perform touch sensing.
  • the driving circuit 20 simultaneously drives a part of the common electrodes 101 of the plurality of common electrodes 101 to perform touch sensing, and one touch sensing of all the common common electrodes 101 is completed by driving a plurality of times.
  • the drive circuit 20 can also perform touch sensing by driving a common electrode 101 each time.
  • the driving circuit 20 drives a common electrode 101 to perform touch sensing every time, or drives the partial common electrode 101 to perform touch sensing at a time, as long as the driving circuit 101 drives the plurality of times by multiple times.
  • the common electrodes 101 perform one touch sensing, that is, the drive circuit 20 is defined to drive the plurality of common electrodes 101 to perform touch sensing.
  • the driving circuit 20 simultaneously supplies the first common voltage Vc1 to the plurality of common electrodes 101, and Time-sharing receiving touch sensing signals from the plurality of common electrodes 101 to achieve simultaneous driving of the plurality of common electrodes 101 to perform image display, and time-division driving the plurality of common electrodes 101 to perform self-capacitive touch sensing .
  • the driving circuit 20 can simultaneously drive the plurality of common electrodes 101 to perform image display and touch sensing.
  • Performing self-capacitive touch sensing for the driving circuit 20 to drive the plurality of common electrodes 101 in a time division manner may be, for example, the driving circuit 20 performing self-capacitance touch sensing by the row driving common electrode 101.
  • the driving circuit 20 supplies the first common voltage Vc1 to perform self-capacitance touch sensing and image display for one row of the common electrodes 101
  • the first common voltage Vc1 is also supplied to perform image display to the common electrodes 101 of the remaining rows.
  • the driving circuit 20 drives the row of common electrodes 101 to perform self-capacitive touch sensing
  • the common electrode 101 driving another row performs self-capacitance touch sensing and image display, and drives the remaining rows of the common electrode 101 to perform an image. display.
  • one touch sensing drive for all the common electrodes 101 is completed by a plurality of times.
  • the driving circuit 20 may drive the common electrode 101 to perform image display and touch sensing row by row, or may simultaneously drive the plurality of rows of common electrodes 101 to perform image display and touch sensing.
  • the driving circuit 20 drives the common electrode 101 to perform self-capacitance touch sensing in a time division (eg, in a row or row by row), the output pin of the chip in which the driving circuit 20 is integrated is driven at the same time as all The common electrode 101 performs self-capacitance touch sensing, and the output pin of the chip is small, so that the area of the chip in which the driving circuit 20 is integrated can be reduced, thereby achieving cost saving.
  • the driving circuit 20 can drive one row of the common electrodes 101 to perform touch sensing at a time, or can drive the plurality of rows of common electrodes 101 to perform touch sensing at one time, and can simultaneously drive all the common electrodes 101 to perform touch simultaneously. Sensing.
  • the driving circuit 20 may not perform touch sensing by the row driving common electrode 101, for example, performing column sensing by the column driving common electrode 101 or driving the common electrode 101 to perform touch sensing or the like in an irregular driving manner. Waiting for the situation is also possible.
  • self-capacitive touch sensing is performed on the driving circuit 20 to drive the plurality of common electrodes 101 in a time-sharing manner: the driving circuit 20 drives the common electrode 101 to perform touch sensing between successive driving, that is, continuous driving, that is, driving The circuit 20, after simultaneously driving the partial common electrode 101 to perform touch sensing, then simultaneously drives another portion of the common electrode 101 to perform touch sensing; or, the driving circuit 20 intermittently drives the plurality of common electrodes 101 to perform self-capacitive touch sensing For example, the driving circuit 20 stops performing the touch sensing driving for a second predetermined time after the driving common electrode 101 performs the touch sensing for the first predetermined time, and then drives the common electrode 101 to perform the touch sensing.
  • an intermittent driving method may also be employed. That is, after the driving circuit 20 simultaneously drives the plurality of common electrodes 101 to perform touch sensing for a first predetermined time, stopping performing touch sensing driving for a second predetermined time, and then simultaneously driving the plurality of public The electrode 101 performs touch sensing.
  • the driving circuit 20 can also perform the plurality of common electrodes 101 in a manner combining time-sharing driving and simultaneous driving. Line touch sensing is also possible.
  • the driving circuit 20 may partially overlap or not overlap the common electrodes 101 that perform touch sensing in two adjacent driving.
  • defining a period in which the common electrode 101 performs touch sensing is the first time period W1
  • defining the plurality of The period in which the common electrode 101 performs image display instead of simultaneously performing touch sensing is the second period W2.
  • a second time period W2 is included between adjacent first time periods W1. For example, the first time period W1 and the second time period W2 alternate.
  • the driving circuit 20 synchronously modulates the signal of the touch display panel 10 by using the modulation signal MGND, and correspondingly, the driving circuit 20 outputs the modulated first common voltage Vc1 to the common electrode 101. Image display and self-capacitive touch sensing are performed simultaneously.
  • the signals outputted to the touch display panel 10 by the driving circuit 20 during the first time period W1 are all first signals, and the driving circuit 20 is defined.
  • the signals output to the touch display panel 10 in the second period W2 are all second signals.
  • the first signal comprises the first common voltage Vc1.
  • the drive circuit 20 In each second period W2, the drive circuit 20 outputs a second signal to the touch display panel 10 to perform image display.
  • the driving circuit 20 does not synchronously modulate the signal of the touch display panel 10 by using the modulation signal MGND.
  • the first signal is, for example, a signal modulated by the second signal via the modulation signal MGND.
  • the driving circuit 20 outputs the first signal to the touch display panel 10 while performing image display and self-capacitive touch sensing.
  • the second signal includes a second common voltage Vc2.
  • the drive circuit 20 outputs a second common voltage Vc2 to perform image display on the plurality of common electrodes 101.
  • the first common voltage Vc1 is, for example, a signal obtained by the second common voltage Vc2 modulated by the modulation signal MGND.
  • the second common voltage Vc2 is, for example, a constant voltage signal with respect to the ground signal GND.
  • the second common voltage Vc2 is, for example, (-1)V.
  • the second common voltage Vc2 may also be voltage signals of other sizes.
  • the modulation signal MGND is, for example, a signal that varies between 0 volts and 1.8 volts.
  • the present invention is not limited thereto, and the signals such as the modulation signal MGND and the second common voltage Vc2 may also be other suitable types of signals, as will be described below.
  • the driving circuit 20 does not synchronously modulate the signal of the touch display panel 10 by using the modulation signal MGND in the second period W2, for example, driving is performed by using an existing display driving method, and thus, the touch display device 1 In the second time period W2, the power consumption is relatively reduced compared to the technical solution in which the modulation is employed in the first time period W1.
  • the driving circuit 20 employs a manner of intermittently driving the plurality of common electrodes 101 to perform touch sensing, and the touch display device 1 can perform self-capacitance touch sensing not only in any process of performing image display, but also Try to avoid The power consumption is increased due to the modulation scheme.
  • the driving circuit 20 drives the plurality of rows of common electrodes 101 to perform touch sensing, for example, or drives all of the common electrodes 101 to perform one touch sensing, or drives all of the common electrodes 101 to perform the most. Secondary touch sensing.
  • the case where the driving circuit 20 drives all the common electrodes 101 to perform a plurality of touch sensing can be divided into various cases, for example, the driving circuit 20 drives all the common electrodes 101 to perform the same number of touch sensing times.
  • the driving circuit 20 drives the part of the common electrode 101 to perform the same number of touch sensing times, and drives the other part of the common electrode 101 to perform the same number of times of the touch sensing.
  • the driving circuit 20 drives the two parts of the common electrode. 101 The number of times the touch sensing is performed is different.
  • the duration setting of the second time period W2 does not affect the overall touch operation of the touch display device 1 , and vice versa.
  • the duration of each of the first time periods W1 is, for example, the same, and the duration of each of the second time periods W2 is, for example, the same.
  • the durations of the first time periods W1 may not be identical or different from each other, and the durations of the second time periods W2 may not be identical or different from each other.
  • the first time period W1 and the second time period W2 of the touch display device 1 having different materials may also be correspondingly different.
  • the durations of the first time period W1 and the second time period W2 may also be different to reduce power consumption. .
  • the driving circuit 20 may still synchronously modulate the signal of the touch display panel 10 by the modulation signal MGND for display driving.
  • the touch display device 1 and its operation principle will be described mainly in a manner in which the driving circuit 20 intermittently and time-divisionally drives the plurality of common electrodes 101 to perform touch sensing.
  • FIG. 3 is a schematic diagram of a circuit structure of a specific implementation of the electronic device 100 .
  • the drive circuit 20 includes a modulation circuit 21, a common voltage generation circuit 22, a touch drive circuit 23, a data selection circuit 24, a control circuit 25, and a signal processing circuit 26.
  • the common voltage generating circuit 22 and the touch driving circuit 23 are connected to the data selecting circuit 24.
  • the data selection circuit 24 connects the plurality of common electrodes 101.
  • the control circuit 25 is connected to the data selection circuit 24.
  • the common voltage generating circuit 22 and the touch driving circuit 23 are selectively connectable to the corresponding common electrode 101 through the data selecting circuit 24.
  • the common voltage generating circuit 22 is for driving the common electrode 101 to perform image display.
  • the touch driving circuit 23 is for driving the same common electrode 101 while performing image display and self-capacitive touch sensing.
  • the signal processing circuit 26 is configured to perform touch coordinate calculation according to the touch sensing signal output by the touch driving circuit 23 to acquire touch position information.
  • the generated signal performs image display and self-capacitance touch sensing to the corresponding common electrode 101.
  • the control circuit 25 correspondingly controls the signal output timing of the data selection circuit 24, for example, according to a control signal of the main control chip 3.
  • the modulation circuit 21 is configured to generate the modulation signal MGND.
  • the modulation signal MGND is, for example, a square wave pulse signal, and includes a first reference signal and a second reference signal.
  • the voltage condition of the first reference signal and the second reference signal may be any one of the following five cases:
  • the voltage of the first reference signal is a positive voltage, and the voltage of the second reference signal is 0V;
  • the voltage of the first reference signal is 0V, and the voltage of the second reference signal is a negative voltage
  • the voltage of the first reference signal is a positive voltage
  • the voltage of the second reference signal is a negative voltage
  • the absolute value of the voltage of the first reference signal is equal to or not equal to the absolute value of the voltage of the second reference signal
  • the voltages of the first reference signal and the second reference signal are positive voltages of different sizes
  • the voltages of the first reference signal and the second reference signal are negative voltages of different sizes.
  • the modulation signal is a square wave pulse signal in which the first reference signal and the second reference signal alternately appear.
  • the modulation signal MGND is, for example, a square wave pulse signal that changes periodically.
  • the modulation signal MGND is not limited to a square wave pulse signal, but may be other suitable waveform signals, such as a sine wave signal, a two-stage staircase signal, and the like.
  • the modulation signal MGND is also not limited to a periodically changing signal, and may be a non-periodic changing signal.
  • the first reference signal of the modulation signal MGND is the ground signal GND
  • the second reference signal is a driving signal higher than the first reference signal.
  • the ground signal GND is 0V
  • the driving signal is 1.8V
  • the grounding signal is 0V
  • the driving signal is 1.8V.
  • the corresponding amplitude can be adjusted according to the product. The present invention does not limit this.
  • the drive circuit 20 may further include a voltage generating circuit 27.
  • the voltage generating circuit 27 is configured to generate the second reference signal.
  • the modulation circuit 21 is connected to the device ground of the electronic device 100 and the voltage generating circuit 22, and receives a ground signal GND on the device ground and a second reference signal generated by the voltage generating circuit 22, corresponding to the modulation.
  • Signal MGND is labeled MGND.
  • the drive circuit 20 achieves all signals of the synchronous modulation touch display panel 10 by providing the modulation signal MGND to a portion of the drive circuit 20. That is, as long as the signal on the portion of the ground is the modulation signal MGND, all the signals of the touch display panel 10 are synchronized to become the signals modulated by the modulation signal MGND.
  • the ground to which the modulation signal MGND is applied in the first period W1 is defined as a modulation ground to distinguish the device ground to which the ground signal GND is applied.
  • the electronic device 100 is based on two domains as a voltage reference. The two fields are shown as a domain 80 referenced to the ground signal GND and a domain 90 referenced to the modulation signal MGND.
  • the ground terminal of the circuit in the domain 80 with reference to the ground signal GND is used to load the ground signal GND
  • the ground terminal of the circuit in the domain 90 with reference to the modulation signal MGND is used to load the modulation signal MGND.
  • the ground-ground circuit has a reference ground potential which is a modulation signal MGND loaded by the modulation ground; and a circuit ground of the device ground, the reference ground potential is a ground signal GND loaded by the device ground.
  • modulation is modulated by the ground signal GND into the modulation signal MGND, and all signals with the modulation-loaded modulation signal MGND as the reference reference are modulated by the modulation signal MGND.
  • the electronic device 100 uses a domain as a voltage reference reference, and both use the ground signal GND as a voltage reference.
  • the ground of the circuit in the electronic device 100 is connected to the device ground, and receives the ground signal GND. That is, in the second period W2, the modulation ground corresponds to the device ground for transmitting the ground signal GND instead of the modulation signal MGND.
  • the common voltage generating circuit 22, the touch driving circuit 23, the data selecting circuit 24, and the control circuit 25 are located in the field 90, the modulation circuit 21 and voltage generating circuit 27 are located in said domain 80.
  • a portion of the signal processing circuit 26 is located in the domain 80 and a portion is located in the domain 90.
  • the modulation circuit 21 includes a modulation terminal M.
  • the modulation circuit 21 outputs the modulation signal MGND to the ground terminal of each circuit in the domain 90 through the modulation terminal M, so that the circuit in the domain 90 with the modulation signal MGND as the voltage reference reference outputs the modulated signal MGND.
  • the modulated signal is applied to the touch display panel 10.
  • the modulation terminal M is connected to the modulation ground or as one end of the modulation ground.
  • a signal on the touch panel 10 for example, an element in a floating state (for example, a pixel electrode 103 that performs image display holding, which will be described later, see FIG. 7) superimposes the modulation signal MGND by capacitive coupling. Therefore, in the first period W1, all the electric signals on the touch display panel 10 become signals modulated by the modulation signal MGND.
  • the circuit in the field 90 for example, the common voltage generating circuit 22, the touch driving circuit 23, the data selecting circuit 24, the control circuit 25, and part of the signal processing circuit 26, if the ground terminal is included, the ground terminal Can be directly connected to the modulation ground.
  • the modulation circuit 21, the common voltage generating circuit 22, the touch driving circuit 23, the data selecting circuit 24, the control circuit 25, the signal processing circuit 26, and the voltage generating circuit 27 are all based on the ground signal GND. Benchmark.
  • the modulation circuit 21 generates the modulation signal MGND according to the ground signal GND on the device ground and the driving signal from the voltage generating circuit 27, and provides the modulation signal MGND to the Modulated ground.
  • the common voltage generating circuit 22 correspondingly generates the first common voltage Vc1, and supplies the image display to the corresponding common electrode 101 through the data selecting circuit 24.
  • the touch driving circuit 23 correspondingly generates the first common voltage Vc1, and provides image display and self-capacitance touch sensing to the corresponding common electrode 101 through the data selection circuit 24.
  • the signal processing circuit 26 receives a touch sensing signal output from the touch driving circuit 23 to acquire touch information.
  • the first common voltage Vc1 outputted to the common electrode 101 by the touch drive circuit 23 is simultaneously used as a display drive signal and a touch drive signal, and the common voltage generating circuit 22 outputs the first common to the common electrode 101.
  • the common voltage Vc1 is only used as a display driving signal.
  • the first common voltage Vc1 outputted by the touch drive circuit 23 and the common voltage generating circuit 22 to the plurality of common electrodes 101 is the same signal modulated by the modulation signal MGND, and the touch drive circuit 23 can further transmit
  • the touch sensing signal sensed from the common electrode 101 is supplied to the signal processing circuit 26 to acquire touch information, and thus, the driving circuit 20 can drive the touch display panel 10 while performing image display and self-capacitive touch sensing.
  • the common voltage generating circuit 22 drives the partial common electrode 101 to perform image display.
  • the touch driving circuit 23 can drive the remaining common electrodes 101 together to perform image display and self-capacitance touch sensing. Therefore, the touch display device 1 of the present invention can simultaneously perform touch sensing in any process of performing image display, and there is no interference between the touch sensing and the image display or less interference to the image display.
  • the common voltage generating circuit 22 supplies the second common voltage Vc2 through the data selecting circuit 24 to perform image display on the plurality of common electrodes 101.
  • the data selection circuit 24 is controlled by the control circuit 25, and the second common voltage Vc2 on the plurality of common electrodes 101 is derived from the common voltage generating circuit 22.
  • the touch drive circuit 23 may further output a second common voltage Vc2 to the data selection circuit 24, for example, but the data selection circuit 24 selectively outputs the second common voltage Vc2 from the common voltage generation circuit 22 to the common electrode 101, thereby
  • the touch display device 1 performs image display instead of performing touch sensing in the second time period W2.
  • the touch display device 1 realizes image display and touch sensing by alternately performing the first time period W1 and the second time period W2.
  • the touch display device 1 may include a first time period W1, a plurality of first time periods W1, a portion of a first time period W1, a first time period W1, and a portion of the first time period W1. Or a plurality of portions of the first time period W1 and the first time period W1.
  • the touch drive circuit 23 is different from the circuit configuration of the common voltage generating circuit 22, so that even if the touch drive circuit 23 and the common voltage generating circuit 22 provide the same signal to the common electrode 101,
  • the common electrode 101 to which the touch driving circuit 23 is connected may further function as a touch sensing electrode.
  • the touch drive circuit 23 further receives a touch sensing signal output from the common electrode 101, and acquires touch information according to the touch sensing signal.
  • the common electrode 101 electrically connected to the touch driving circuit 23 may correspondingly output different touch sensing signals to the touch sensing in response to a touch or proximity of a target object (eg, a suitable object such as a finger)
  • the drive circuit 23, correspondingly, the touch drive circuit 23 can obtain touch information according to the touch sensing signal.
  • the common voltage generating circuit 22 does not receive the signal from the common electrode 101, or even if the signal from the common electrode 101 is received, based on the circuit configuration of the common voltage generating circuit 22 itself, whether or not there is above the common electrode 101
  • the target object touches or approaches a signal output from the common electrode 101 electrically connected to the common voltage generating circuit 22. It is basically the same, so you can't get touch information.
  • the common voltage generating circuit 22 and the touch driving circuit 23 share the same signal source 221, and the signal source 221 is modulated by the modulation signal MGND to generate a first reference voltage signal.
  • the common voltage generating circuit 22 and the touch driving circuit 23 correspondingly output the same first common voltage Vc1 to the plurality of common electrodes 101 according to the first reference voltage signal, wherein the common voltage generating circuit 22 is electrically
  • the connected common electrode 101 performs image display instead of simultaneously performing touch sensing, and the common electrode 101 electrically connected to the touch drive circuit 23 simultaneously performs image display and self-capacitive touch sensing.
  • the touch driving circuit 23 supplies the same signal to the common electrode 101 as the common voltage generating circuit 22, the touch driving circuit 23 does not affect the execution while driving the common electrode 101 to perform self-capacitive touch sensing.
  • the self-capacitive touch-sensing common electrode 101 performs normal image display.
  • the common voltage generating circuit 22 and the touch driving circuit 23 share the same signal source 221, the common voltage generating circuit 22 and the signal that the touch driving circuit 23 outputs to the plurality of common electrodes 101 The same or substantially the same can be achieved to ensure the quality of touch sensing and image display.
  • the common voltage generating circuit 22 includes, for example, a signal source 221, a follower 222, and a voltage stabilizing circuit 223.
  • the signal source 221 is coupled to the follower 222, and the follower 222 is further coupled to the data selection circuit 24.
  • One end of the voltage stabilizing circuit 223 is connected between the follower 222 and the data selection circuit 24, and the other end is connected to the modulation ground.
  • the signal source 221 includes a ground terminal a and an output terminal b.
  • the ground terminal a is connected to the modulation ground.
  • the output terminal b is connected to the follower 222.
  • the signal source 221 is, for example, a DC source.
  • the present invention is not limited thereto, and the signal source 221 may also be other suitable circuit structures.
  • the follower 222 transmits a signal output from the signal source 221 to the data selection circuit 24, and is supplied to the corresponding common electrode 101 through the data selection circuit 24 to perform image display.
  • the follower 222 is, for example, a first amplifier.
  • the present invention is not limited thereto, and the follower 222 may be other suitable circuit structures, and is not limited to the first amplifier.
  • the follower 222 is taken as an example of the first amplifier.
  • the first amplifier 222 includes a third power terminal c1, a third ground terminal d1, a first in-phase terminal e1, a first inverting terminal f1, and a first output terminal g1.
  • the third power terminal c1 is used to load the power voltage VDD1.
  • the third ground terminal d1 is used to connect the modulation ground.
  • the first in-phase end e1 is for connecting to the output end b of the signal source 221.
  • the first inverting terminal f1 is shorted to the first output end g1.
  • the first output terminal g1 is connected to the data selection circuit 24.
  • the voltage stabilizing circuit 223 is connected between the first output terminal g1 and the modulation ground for regulating the voltage between the follower 222 and the data selection circuit 24.
  • the regulator circuit 223 includes, for example, a voltage stabilizing capacitor Cw.
  • the voltage stabilizing capacitor Cw is connected between the first output terminal g1 and the modulation ground.
  • the grounding terminal a and the third grounding terminal d1 receive the modulation signal MGND, and the signal source 221 correspondingly outputs the first reference voltage signal to the output terminal b.
  • the first amplifier 222 The first amplifier 222 is in a virtual short state, and correspondingly outputs a first common voltage Vc1 identical to the first reference voltage signal to the data selection circuit 24, and is supplied to the corresponding common electrode through the data selection circuit 24. 101 performs image display.
  • the ground terminal a and the third ground terminal d1 each receive a ground signal GND, and the signal source 221 correspondingly outputs a second reference voltage signal to the first amplifier 222 through the output terminal b
  • An amplifier 222 is in a virtual short state, and correspondingly transmits a second common voltage Vc2 identical to the second reference voltage signal to the data selection circuit 24, and is supplied to the plurality of common electrodes through the data selection circuit 24. 101 performs image display.
  • the touch drive circuit 23 includes, for example, the signal source 221 and a plurality of operational amplifiers 231.
  • Each operational amplifier 231 includes a second amplifier 232 and a feedback branch 233.
  • the second amplifier 232 includes a fourth power terminal c2, a fourth ground terminal d2, a second in-phase terminal e2, a second inverting terminal f2, and a second output terminal g2.
  • the fourth power terminal c2 is used to load the power voltage VDD2.
  • the fourth ground terminal d2 is used to connect the modulation ground.
  • the second in-phase end e2 is for connecting to the output end b of the signal source 221.
  • the second inverting terminal f2 is connected to the data selection circuit 24 and further connected to the second output terminal g2 through the feedback branch 233.
  • the second output terminal g2 is further connected to the signal processing circuit 26.
  • the feedback branch 233 includes, for example, a feedback capacitor 233a and a reset switch 233b.
  • the feedback capacitor 233a and the reset switch 233b are connected in parallel between the second inverting terminal f2 and the second output terminal g2.
  • the fourth ground terminal d2 receives the modulation signal MGND.
  • the second amplifier 232 is in a virtual short state, receives a first reference voltage signal from the signal source 221, and correspondingly outputs a first common voltage Vc1 to the data selection circuit 24, and provides the data through the data selection circuit 24.
  • the feedback branch 233 is configured to transmit a touch sensing signal sensed by the common electrode 101 to the signal processing circuit 26.
  • the touch sensing signal is also modulated by the modulation signal MGND, when the signal processing circuit 26 performs an analysis calculation on the touch sensing signal, the touch sensing signal may be inversely modulated as needed. To get touch coordinate information.
  • the number of the plurality of operational amplifiers 231 is, for example, the same as the number of columns of the plurality of common electrodes 101. Each operational amplifier 231 is selectively connectable to a column of common electrodes 101 via data selection circuit 24. However, the number of the plurality of operational amplifiers 231 may be the same as the number of rows of the plurality of common electrodes 101. In addition, the present invention is not limited thereto. For example, it is also possible that the common electrode 101 of each column can also be connected to the second operational amplifier 231 and the like.
  • the touch drive circuit 23 of the present invention supplies the same touch drive signal to the common electrode 101 as the first common voltage Vc1 generated by the common voltage generating circuit 22, whereby the touch drive signal can drive the common electrode 101 to perform both image display and self-execution
  • the capacitive touch sensing therefore, the plurality of common electrodes 101 of the touch display device 1 can further perform touch sensing while performing image display.
  • each of the touch driving circuit 23 and the common voltage generating circuit 22 respectively uses a signal source, and the touch driving circuit 23 and the common voltage generating circuit 22 share the same signal source 221 of the present application. , therefore,
  • the first common voltage Vc1 outputted by the touch drive circuit 23 and the common voltage generating circuit 22 to the plurality of common electrodes 101 through the data selection circuit 24 may be more the same or may be the same, thereby ensuring the touch.
  • the touch drive circuit 23 and the common voltage generating circuit 22 may each select a circuit structure such as a signal source.
  • the modulation ground becomes a device ground
  • the signal source 221 outputs a second reference voltage signal to the follower 222 and the plurality of operational amplifiers 231
  • the control circuit 25 controls the data selection circuit 24 to select Outputting a second common voltage Vc2 from the common voltage generating circuit 22 performs image display on the plurality of common electrodes 101.
  • a first switch (not shown) may be disposed between the signal source 221 and the follower 222, and a second switch is disposed between the signal source 221 and the operational amplifier 231 (not shown)
  • the first time period W1 both the first switch and the second switch are in a closed state
  • the second time period W2 the first switch is in a closed state
  • the second switch is in an open state.
  • the data selection circuit 24 includes, for example, a first data selector 241 and a plurality of second data selectors 242.
  • the follower 222 is connected to the first data selector 241, and the first data selector 241 is connected to the plurality of common electrodes 101, respectively.
  • Each of the operational amplifiers 231 is connected to a second data selector 242, and each of the second data selectors 242 is connected to a column of common electrodes 101.
  • the first data selector 241 and the plurality of second data selectors 242 are respectively connected to the control circuit 25.
  • the control circuit 25 controls signal output timings of the first data selector 241 and the plurality of second data selectors 242.
  • the plurality of common electrodes 101 are arranged in a matrix of 26 rows and 40 columns.
  • the number of the plurality of operational amplifiers 231 is 40
  • the number of the second data selectors 242 is 40.
  • the first data selector 241 includes a first output port O1 for outputting a signal from the common voltage generating circuit 22 to the corresponding common electrode 101.
  • the number of the first output ports O1 is the same as the number of rows of the plurality of common electrodes 101, that is, 26.
  • Each of the second data selectors 242 includes a second output port O2 for outputting a signal from the touch drive circuit 23 to the corresponding common electrode 101.
  • the number of the second output ports O2 is the same as the number of rows of the plurality of common electrodes 101, that is, 26. It should be noted that, in FIG. 2, limited to the illustrated size, only part of the circuit structure is actually shown. For example, only two operational amplifiers 231, two second data selectors 242, and a portion of the common electrode 101 are shown. .
  • each second data selector 242 is respectively connected to a common electrode 101.
  • Each of the first output ports O1 is connected to a second output port O2 of each of the second data selectors 242 and the common electrode 101, thereby saving the number of the connection lines L, and the different first output ports O1 are connected to each other.
  • the number of the first data selectors 241 may also be multiple, not limited to one, and correspondingly, the first of the plurality of first data selectors 241
  • the connection relationship between the output port O1 and the second output port O2 of the plurality of second data selectors 242 can be adjusted correspondingly, for example, each first data selector The 241 is connected to the partial second data selector 242.
  • the first output port O1 of each of the first data selectors 241 and the second output port O2 of the plurality of second data selectors 242 may be Connect, and so on.
  • the plurality of second data selectors 242 are 26-selected data selectors under the control of the control circuit 25, and correspondingly, each second data selector 242 outputs the touch drive circuit each time.
  • the first common voltage Vc1 of 23 is given to a common electrode 101, and the plurality of second data selectors 242 drive all of the common electrodes 101 to perform one touch sensing.
  • the first data selector 241 is a 26-select 25 data selector under the control of the control circuit 25, and when the plurality of second data selectors 242 output the first common voltage Vc1 to the common electrode 101 of the same row, The first data selector 241 outputs the first common voltage Vc1 from the common voltage generating circuit 22 to the respective common electrodes 101 of the remaining rows. It should be noted that the 26 touch driving may be completed in one or more first time periods W1.
  • the first data selector 241 becomes a 26-select 26 data selector under the control of the control circuit 25, and outputs a second common voltage Vc2 from the common voltage generating circuit 22 to all the common electrodes. 101.
  • the second data selector 242 stops outputting signals to the common electrode 101 under the control of the control circuit 25, for example.
  • the touch driving circuit 23 and the common voltage generating circuit 22 of the touch display device 1 are not limited to the above-described circuit configuration, and may be other suitable circuit configurations.
  • the data selection circuit 24 is not limited to the first data selector 241 and the second data selector 242, but may be other suitable switching circuit configurations.
  • the data selection circuit 24 on the one hand, the number of connection lines L between the driving circuit 20 and the plurality of common electrodes 101 can be reduced, and on the other hand, image display for driving the plurality of common electrodes 101 can be performed. At the same time, the time-division driving common electrode 101 performs touch sensing.
  • the touch display device 1 can also continue to perform both image display and touch sensing.
  • the common voltage generating circuit 22 and the touch driving circuit 23 continuously provide the first A common voltage Vc1 is supplied to the common electrode 101, and the common voltage generating circuit 22 spatially drives the plurality of common electrodes 101 in cooperation with the touch driving circuit 23.
  • the control circuit 25 correspondingly controls the first data selector 241 to always hold 26 select 25, and controls the plurality of second data selectors 242 to always keep 26 select 1.
  • only the touch drive circuit 23 may be selected to continuously drive the plurality of common electrodes 101 while performing image display and touch sensing, and the common voltage generating circuit 22 is omitted.
  • the data selection circuit 24, the common voltage generating circuit 22, the touch driving circuit 23, and the plurality of common electrodes can be adjusted accordingly.
  • the corresponding circuit information can be reasonably estimated, and therefore, no further details are provided herein.
  • the driving circuit 20 may further include, for example, a fingerprint driving circuit that selectively connects the plurality of common electrodes 101 when the driving circuit 20 is at the driving portion common electrode 101
  • the fingerprint driving circuit can also drive the partial common electrode 101 to simultaneously perform fingerprint sensing and image display
  • the common voltage generating circuit 22 drives the partial common electrode to perform image display. Therefore, in the present application,
  • the driving of the common electrode 101 is not limited to the common voltage generating circuit 22 and the touch driving circuit 23, and may include other circuits of a suitable type or suitable function, and the corresponding driving common electrode 101 performs a corresponding function.
  • FIG. 4 is a schematic diagram showing the circuit structure of an embodiment of the modulation circuit 21.
  • the modulation circuit 21 includes a first active switch 211, a second active switch 213, and a control unit 215.
  • the first active switch 211 includes a control terminal K1, a first transmission terminal T1, and a second transmission terminal T2.
  • the second active switch 213 includes a control terminal K2, a first transmission terminal T3, and a second transmission terminal T4.
  • the control terminals K1, K2 are all connected to the control unit 215.
  • the second transmission end T2 of the first active switch 211 is connected to the first transmission end T3 of the second active switch 213, and defines an output node N on the connection line, and the first transmission end T1 of the first active switch 211 Receiving the first reference signal, the second transmission end T4 of the second active switch 213 receives the second reference signal, and the control unit 215 controls the output correspondingly by controlling the first and second active switches 211, 213
  • the node N alternately outputs the first reference signal and the second reference signal to form a modulation signal MGND.
  • the first reference signal is a ground signal GND
  • the second reference signal is a driving signal.
  • the second transmission end T4 is connected to the voltage generating circuit 27, the first transmission end T1 is connected to the device ground for receiving the ground signal GND, and the node N is for outputting the modulation signal MGND. Give modulation.
  • the first active switch 211 and the second active switch 213 are, for example, suitable switches of a thin film transistor, a triode, a metal oxide semiconductor field effect transistor, or the like.
  • the working principle of the modulation circuit 21 is that, in the first time period W1, the control unit 215 is configured to control the modulation circuit 21 to output the modulation signal MGND to the ground in the domain 90, and the ground in the domain 90 is modulated. In the second time period W2, the control unit 215 is configured to control the modulation circuit 21 to output the ground signal GND to the modulation ground, at which time the modulation ground becomes the same as the device ground.
  • the electronic device 100 has a reference field 80 based on the ground signal GND and a reference field 90 based on the modulation signal MGND.
  • the touch driving circuit 23 supplies the excitation signal to the common electrode 101
  • the touch sensing signal output from the common electrode 101 itself is further received to acquire touch information, and therefore, the touch driving circuit 23 drives the touch display.
  • the principle when the panel 10 performs touch sensing is the self-capacitance touch sensing principle.
  • the electronic device 100 employs two domains 80, 90 with reference to GND and MGND, not only is the signal of the touch display panel 10 being synchronously modulated as a whole, but the signal-to-noise ratio is improved, and the touch drive circuit 23 is in the field 90.
  • Some of the circuit structures are correspondingly simplified, which in turn simplifies the circuit structure and saves product costs.
  • the signal source 221 of the touch drive circuit 23 and the signal source 221a of the conventional touch drive circuit (see FIG. 5 below) will be described as an example.
  • FIG. 5 is a schematic diagram showing the circuit structure of the signal source 221a of the conventional touch driving circuit.
  • FIG. 6 is a schematic diagram showing the circuit structure of the signal source 221 of the touch drive circuit 23.
  • the signal source 221a is based on the ground signal GND as a voltage reference.
  • Touch drive circuit of the present application When 23 is in operation, the signal source 221 is based on the modulation signal MGND as a voltage reference.
  • the signal source 221a includes a current source Ia, a resistor Ra, a first switch K1a, and a second switch K2a.
  • the current source Ia and the resistor Ra are connected in series between the power supply terminal P1 and the device ground GND.
  • One end of the first switch K1a is connected between the current source Ia and the resistor Ra, and the other end is connected to the non-inverting terminal h of the touch driving circuit.
  • One end of the second switch K2a is connected between the first switch K1a and the non-inverting terminal h, and the other end is connected to the ground for loading the ground signal GND.
  • the signal source 221 includes a current source Ib and a resistor Rb connected in series between the power terminal P2 and the ground for loading the modulation signal MGND.
  • the receiving end of the touch driving circuit 23, that is, the second non-inverting terminal g2 is connected between the current source Ib and the resistor Rb. Since the modulation signal MGND is varied, the output voltage between the power terminal P2, the current source Ib, and the resistor Rb varies with the modulation signal MGND on the modulation ground, thereby correspondingly generating a touch sensing drive.
  • the signal is sent to the second non-inverting terminal g2.
  • the circuit structure of the signal source 221 becomes simple, and the touch sensing driving signal generated by the signal source 221 is stable compared to the touch sensing driving signal generated by the signal source 221a.
  • FIG. 7 is a schematic structural diagram of a circuit of a specific implementation of the electronic device 100.
  • the touch display device 1 is described by taking a liquid crystal display device as an example.
  • the circuit structure of the touch display device 1 may be different for all the different types of display devices, and the circuit configurations of different liquid crystal display devices may also be different.
  • the structure that can be easily derived by a person of ordinary skill in the art should fall within the protection scope of the present application.
  • the touch display panel 10 of the touch display device 1 includes a plurality of pixel dots 11. Each pixel 11 is driven by the drive circuit 20 for performing image display and touch sensing.
  • Each of the pixel points 11 includes the common electrode 101, the pixel electrode 103, and the switching unit 104.
  • the switch unit 104 includes a control switch 105.
  • the control switch 105 includes a control electrode G, a first transfer electrode S, and a second transfer electrode D.
  • the control electrode G and the first transfer electrode S are connected to the drive circuit 20.
  • the second transfer electrode D is connected to the pixel electrode 103.
  • the driving circuit 20 is configured to drive the control switch 105 to be turned on and off.
  • the switch unit 104 includes a control switch 105.
  • the switch unit 104 may also include two control switches 105 or more, but may further include Other circuit components, such as memory circuits.
  • the two control switches 105 are, for example, connected in series.
  • the control switch 105 is, for example, a thin film transistor switch.
  • the thin film transistor switch is, for example, a low temperature polysilicon thin film transistor switch, an amorphous silicon thin film transistor switch, an indium gallium zinc oxide (IGZO) thin film transistor switch, a high temperature polysilicon thin film transistor switch, or the like.
  • the invention is not limited thereto, and the control switch 105 can also be other suitable types of switches.
  • the control switch 105 is a thin film transistor switch
  • the control electrode G is the gate of the thin film transistor switch
  • the first transfer electrode S is the source of the thin film transistor switch
  • the second transfer electrode D is the drain of the thin film transistor switch.
  • each pixel 11 includes a pixel electrode 103 and a control switch 105, respectively. Since the size of the common electrode 101 is generally larger than the size of the pixel electrode 103, correspondingly, the plurality of pixel points 11 share the same common electrode 101. However, in other modified embodiments, a common electrode 101 may be included for each pixel point 11 respectively.
  • the driving circuit 20 drives the control switch 105 to turn on by providing the first scan on signal Vg1, and provides the first gray scale voltage Vd1 to the pixel through the turned-on control switch 105.
  • the electrode 103 supplies a first common voltage Vc1 to the common electrode 101 to drive the pixel point 11 to perform image display refresh.
  • the first scan enable signal Vg1, the first gray scale voltage Vd1, and the first common voltage Vc1 are both signals that are synchronously modulated by the modulation signal MGND.
  • the drive circuit 20 drives the plurality of pixel points 11 in rows to perform image display refresh.
  • the driving circuit 20 supplies the first scan cutoff signal Vg2 to the control switch 105 of the pixel point 11 of the remaining row,
  • the control switch 105 of the pixel point 11 of the remaining row is turned off, thereby causing the pixel points 11 of the remaining rows to be in the image display holding state.
  • the first scan cutoff signal Vg2 is a signal modulated by the modulation signal MGND.
  • the plurality of pixel dots 11 are arranged in a plurality of rows and columns. However, the plurality of pixel points 11 may also be arranged in other regular or irregular manners.
  • the driving circuit 20 simultaneously drives the pixel point 11 performing the touch sensing and the pixel point 11 performing the image display refresh without overlapping, for example, executing the image.
  • the pixels 11 of the display refreshed pixel point 11 and the common electrode 101 performing touch sensing are spaced apart at a pixel point 11 where image display retention is performed.
  • the pixel point 11 that performs touch sensing and the pixel point 11 that performs image display refresh can be maintained by a predetermined distance without being overlapped by software or hardware or hardware and software control.
  • the pixel point 11 performing image display refreshing may also select to simultaneously perform touch sensing under the driving of the driving circuit 20, or simultaneously perform image display refreshing of the pixel point 11 and performing touch
  • the partially overlapped pixels 11 may also be selected to be partially overlapped, for example, a common electrode 101 is completely or partially shared between the pixel dots 11.
  • the driving circuit 20 supplies, for example, a second scan on signal Vg3 to the control switch 105, activates the control switch 105, and supplies the second gray scale voltage Vd2 to the pixel electrode 103 through the activated control switch 105.
  • the driving circuit 20 drives the pixel point 11 of a certain row to perform image display refresh
  • the second scan cutoff signal Vg4 is supplied to the control switch 105 of the pixel 11 of the remaining row, thereby turning off the pixel points 11 of the remaining rows. In the image display hold state.
  • the first scan enable signal Vg1 is, for example, a signal modulated by the second scan enable signal Vg3 via the modulation signal MGND.
  • the first scan cutoff signal Vg2 is, for example, a signal modulated by the second scan cutoff signal Vg4 via the modulation signal MGND.
  • the first gray scale voltage Vd1 is a signal modulated by the corresponding second gray scale voltage Vd2 via the modulation signal MGND.
  • a first gray scale voltage Vd1 is a signal modulated by the modulation signal MGND by the second gray scale voltage Vd2
  • the voltage difference between the second gray scale voltage Vd2 and the second common voltage Vc2 is equal to the first A pressure difference between the gray scale voltage Vd1 and the first common voltage Vc1.
  • the voltage difference between the first pixel electrode 103 and the common electrode 101 determines the display gradation level of each pixel point 11 .
  • the gray scale voltage can be classified into a positive gray scale voltage and a negative polarity gray scale voltage for the same display gray level.
  • the touch display panel 10 may further include a plurality of scan lines 281 and a plurality of data lines 291.
  • the plurality of scan lines 281 and the plurality of data lines 291 are, for example, insulated cross-distributions.
  • the plurality of scanning lines 281 extend, for example, in the X direction and are arranged in the Y direction.
  • the plurality of data lines 291 extend, for example, in the Y direction and are arranged in the X direction.
  • Each of the scanning lines 281 is connected to the control electrode G of the control switch 105 of one row of pixel points 11, respectively.
  • Each of the data lines 291 is connected to a first transmission electrode S of a control switch of a column of pixel points 11, respectively.
  • the plurality of scan lines 281 are configured to transmit the first scan enable signal Vg1, the second scan enable signal Vg3, the first scan cutoff signal Vg2, or the second scan cutoff signal Vg4 from the driving circuit 20 to the control switch 105.
  • the plurality of data lines 291 are used to transmit the first gray scale voltage Vd1 or the second gray scale voltage Vd2 from the drive circuit 20 to the first transfer electrode S of the control switch 105.
  • the drive circuit 20 further includes a display drive circuit 20a for driving the touch display panel 10 to perform image display.
  • the display driving circuit 20a includes a scan driving circuit 28, a scan signal generating circuit 28a, a data driving circuit 29, and the common voltage generating circuit 22.
  • the scan driving circuit 28 connects the plurality of scan lines 281.
  • the data driving circuit 29 connects the plurality of data lines 291.
  • the scan driving circuit 28 and the data driving circuit 29 are both connected to the control circuit 25.
  • the control circuit 25 is further configured to control the scan timing of the scan drive circuit 28 and provide corresponding display data to the data drive circuit 29.
  • the scan signal generating circuit 28a is connected to the scan driving circuit 28.
  • the scan signal generating circuit 28a is configured to generate the first scan enable signal Vg1, the second scan enable signal Vg3, the first scan cutoff signal Vg2, or the second scan cutoff signal Vg4, and provide the first scan enable signal Vg1, the second scan enable signal Vg3, the first scan cutoff signal Vg2, or the second scan cutoff signal Vg4 are supplied to the scan driving circuit 28.
  • the scan driving circuit 28 includes, for example, a circuit structure of a shift register, receives a scan enable signal and a scan cutoff signal from the scan signal generating circuit 28a, and correspondingly provides a scan enable signal and a scan cutoff signal to the corresponding control under the control of the control circuit 25. Scan line 281.
  • the scan signal generating circuit 28a, the scan driving circuit 28, and the data driving circuit 29 are also located in the field 90.
  • the scan signal generating circuit 28a is modulated by the modulation signal MGND of the modulation circuit 21 to output the first scan enable signal Vg1, the first scan cutoff signal Vg2 to the scan drive circuit 28, and the scan drive circuit 28 correspondingly outputting the first scan enable signal Vg1 and the first scan cutoff signal Vg2 to the corresponding scan line 281 under the timing control of the control circuit 25, wherein the data drives the data
  • the path 29 is modulated by the modulation signal MGND of the modulation circuit 21, and outputs the first gray scale voltage Vd1 to the plurality of data lines 291 to be supplied to the corresponding pixel electrode 103 through the activated control switch 105 to perform image display. Refresh.
  • the common voltage generating circuit 22 and the touch driving circuit 23 supply the first common voltage Vc1 to the plurality of common electrodes 101 through the data selecting circuit 24.
  • the signal on the pixel electrode 103 of the pixel point 11 held by the image display becomes a signal modulated by the modulation signal MGND by capacitive coupling. Therefore, the signals on the pixel electrode 103 and the common electrode 101 of each pixel 11 of the touch display panel 10 become signals that are synchronously modulated by the modulation signal MGND.
  • the drive circuit 20 can simultaneously drive the common electrode 101 to perform touch sensing in any process of driving the touch display panel 10 to perform normal image display.
  • the scan driving circuit 28 supplies the first scan enable signal Vg1 to a scan line 281
  • the common voltage generating circuit 22 supplies the first common voltage Vc1 to perform image display to the partial common electrode 101
  • the touch drive circuit 23 provides the first common voltage.
  • Vc1 performs image display and self-capacitance touch sensing on the remaining common electrodes 101.
  • the touch display device 1 of the present application synchronizes all signals of the touch display panel 10 by using the modulation signal MGND, thereby making use for the touch display device of the Incell type that performs touch sensing compared to the existing multiplexing common electrode.
  • the signal for driving the common electrode 101 to perform image display can be further used as a touch driving signal. Therefore, when the driving circuit 20 supplies the first scan enable signal Vg1 to the scan line 281, the self-capacitive touch feeling can also be performed on the common electrode 101. Accordingly, the touch display device 1 is not necessarily limited to driving the common electrode 101 to perform touch sensing in the line gap I and the frame gap, and thus, there is no time for performing touch sensing on the display device with improved display resolution. Not enough technical problems. In addition, the touch display device 1 performs touch sensing in any process of displaying an image, and has no influence or influence on normal display of the image.
  • the first common voltage Vc1 outputted by the driving circuit 20 to the plurality of common electrodes 101 are the same, and the first common voltage Vc1 is a changed signal compared to the ground signal GND, and thus, The first common voltage Vc1 may be further used as a touch driving signal, and accordingly, the driving circuit 20 may further drive the common electrode 101 to perform self-capacitance touch sensing while driving the common electrode 101 to perform normal image display.
  • the scan signal generating circuit 28a outputs the second scan enable signal Vg3 and the second scan cutoff signal Vg4 to the scan driving circuit 28, and the scan driving circuit 28 is in the control circuit.
  • the second scan enable signal Vg3 is outputted to the corresponding scan line 281, and the data drive circuit 29 outputs the second gray scale voltage Vd2 to the plurality of data lines 291.
  • the common voltage generating circuit 22 supplies a second common voltage Vc2 to the plurality of common electrodes 101. Thereby, the touch display panel 10 is driven to perform image display.
  • the second common voltage Vc2 generally selects a constant voltage signal that is constant with respect to the ground signal GND, for example, (-1)V.
  • the modulation signal MGND is, for example, a periodically changing signal
  • the frequency is, for example, 200 kHz
  • the amplitude is 1.8 V
  • the first common voltage Vc1 is a signal in which a voltage signal of (-1) V and a voltage signal of 0.8 V are alternately output.
  • the modulation circuit 21 outputs the modulation signal MGND to the touch drive circuit 23, and the modulation circuit 21 outputs the modulation signal MGND to other circuits having the ground terminal in the field 90, such as a common voltage generation circuit. 22. Scanning signal generating circuit 28a and the like. However, those skilled in the art can clearly know from the above description that the modulating circuit 21 has an output modulated signal MGND to other circuits in the field 90 having a ground terminal.
  • the drive circuit 20 may also not drive all of the common electrodes 101 to perform self-capacitive touch sensing.
  • FIG. 8 is an exploded perspective view of an embodiment of the touch display panel 10 of FIG. 7.
  • FIG. 9 is a cross-sectional structural view of the touch display panel 10 of FIG. 8.
  • the touch display panel 10 includes a first substrate 106, a second substrate 107, and a display medium layer 108.
  • the display medium layer 108 is a liquid crystal layer in this embodiment, but may be modified, and in other embodiments, may correspond to other display media.
  • the pixel electrode 103 of the plurality of pixel points 11 and the control switch 105, the plurality of scanning lines 281, and the plurality of data lines 291 are all disposed on the second substrate 107.
  • the display medium layer 108 and the plurality of common electrodes 101 are disposed between the first substrate 106 and the second substrate 107.
  • the first substrate 106 and the second substrate 107 are, for example, transparent insulating substrates.
  • the transparent insulating substrate is, for example, a glass substrate, a film substrate, or the like.
  • the second substrate 107, and the pixel electrode 103 disposed on the second substrate 107, the control switch 105, the plurality of scan lines 281, and the plurality of data lines 291 are generally collectively referred to as an Array substrate.
  • a color filter (not shown) is disposed on the first substrate 106 to implement color image display.
  • the first substrate 106 and the color filter are generally collectively referred to as a color filter (CF) substrate.
  • One side of the first substrate 106 facing away from the second substrate 107 is used for image display and receiving touch sensing.
  • the color filter may also be placed on the second substrate 107.
  • the color filters may also be omitted, and alternatively, light sources of three colors of red, green, and blue may be used for illumination.
  • the side of the second substrate 107 facing away from the first substrate 106 can also be used for image display and receiving touch sensing.
  • the touch display panel 10 is again a double-sided touch display panel. The present invention is not particularly limited as to whether the touch display panel 10 is a single-sided touch display panel or a double-sided touch display panel.
  • the plurality of common electrodes 101 are disposed between the display medium layer 108 and the second substrate 107.
  • the plurality of common electrodes 101 are located between the display medium layer 108 and the plurality of pixel electrodes 103.
  • the plurality of common electrodes 101 are located in the same layer, and the plurality of pixel electrodes 103 are located on the same layer, and the two are stacked.
  • the touch display device 1 is an example of a liquid crystal display device
  • the liquid crystal display device is a liquid crystal display device of a Fringe Field Switching (FFS).
  • the plurality of common electrodes 101 are respectively provided with slits 101a. Thereby, a fringe electric field is formed with the pixel electrode 103.
  • the plurality of The pixel electrodes 103 may not be provided with slits, and each of them may be a single-piece electrode. However, the plurality of pixel electrodes 103 may be provided with slits to improve the fringe electric field strength.
  • FIG. 10 is a cross-sectional structural diagram of another embodiment of the touch display panel 10 of FIG. 7.
  • FIG. 11 is a top plan view of the touch display panel 10 of FIG.
  • the plurality of common electrodes 101 may also be disposed between the pixel electrode 103 and the second substrate 107.
  • the plurality of common electrodes 101 and the plurality of pixel electrodes 103 are stacked one on another.
  • a slit 103a is respectively disposed on the plurality of pixel electrodes 103 to form a fringe electric field with the common electrode 101.
  • the plurality of common electrodes 101 may not be provided with slits, each of which is a whole piece of electrodes. However, the plurality of common electrodes 101 may be provided with slits to improve the edges. Electric field strength.
  • the touch display panel 10 may be an In-Plane Switching (IPS) liquid crystal display panel, or the touch display panel 10 may be a twisted nematic type (Twisted Nematic, The liquid crystal display panel of TN), or the touch display panel 10 is any other suitable type of display panel.
  • IPS In-Plane Switching
  • TN twisted nematic type
  • the touch display panel 10 is any other suitable type of display panel.
  • the electronic device 100 further includes a main control chip 3.
  • the main control chip 3 is connected to the touch display device 1.
  • the main control chip 3 is used for data communication with the touch display device 1.
  • the main control chip 3 is further used to supply a power supply voltage to the touch display device 1.
  • the main control chip 3 can be a single chip or a chipset.
  • the chipset includes an application processor (AP) and a power chip.
  • the chipset may further include a memory chip.
  • the application processor may also be a central processing unit (CPU).
  • the main control chip 3 includes a power supply terminal 31 and a ground terminal 33.
  • the power supply terminal 31 is connected to the driving circuit 20 for supplying power to the driving circuit 20.
  • the ground terminal 33 is connected to the device ground and receives the ground signal GND of the device ground. In the first period W1 and the second period W2, the main control chip 3 is based on the ground signal GND as a voltage reference.
  • the main control chip 3 supplies display data and associated control signals to the display drive circuit 20a, for example.
  • the display driving circuit 20a correspondingly drives the touch display panel 10 to perform corresponding image display according to the signal provided by the main control chip 3.
  • the main control chip 3 further supplies, for example, a power supply voltage signal (VDD1, VDD2) to circuits such as the touch drive circuit 23 and the common voltage generation circuit 22.
  • the touch drive circuit 23 provides a touch drive signal to the common electrode 101 to perform touch sensing, and the master control chip 3 receives a signal output from the signal processing circuit 26, corresponding to whether the control electronic device 100 performs a corresponding function.
  • the main control chip 3 controls the timing of the touch sensing by the driving circuit 20 by controlling the data selection circuit 24, for example, by supplying a control signal to the control circuit 25, and controlling the data selection circuit 24 by the control circuit 25.
  • the circuit such as the display driving circuit 20a and the touch driving circuit 23 is located in the domain 90. Therefore, the master located in the domain 80
  • the signal transmission between the chip 3 and the circuits such as the display driving circuit 20a and the touch driving circuit 23 in the field 90 is subjected to, for example, level shift processing to satisfy the withstand voltage requirement of the electronic component.
  • level conversion processing is performed, if The level conversion processing is not performed by the level shift processing.
  • FIG. 12 is a structural block diagram of an embodiment of the signal processing circuit 26 shown in FIG.
  • FIG. 13 is a schematic structural diagram of an embodiment of a signal processing unit 261 of the signal processing circuit 26 shown in FIG.
  • the signal processing circuit 26 includes a plurality of signal processing units 261. Each of the signal processing units 261 is connected to an operational amplifier 231 for processing and calculating the sensing signals output from the operational amplifier 231 to obtain touch information.
  • the signal processing unit 261 includes an analog-digital signal conversion unit 263 and a calculation unit 265.
  • the analog-digital signal conversion unit 263 performs analog-to-digital conversion on the signal output from the second output terminal g2 of the operational amplifier 231, and outputs the converted digital signal to the calculation unit 265.
  • the calculation unit 265 calculates and obtains touch coordinates according to the digital signal.
  • the computing unit 265 is connected to the main control chip 3 for outputting a signal indicating touch coordinates to the main control chip 3.
  • the main control chip 3 controls the electronic device 100 to perform a corresponding function according to the signal indicating the touch coordinates.
  • the configuration of the signal processing circuit 26 is not limited to the configuration shown in FIG. 12.
  • the plurality of operational amplifiers 231 may share a signal processing unit 261 instead of each of the operational amplifiers 231.
  • a signal processing unit 261 is connected.
  • a filtering unit is further included between the analog-digital signal converting unit 263 and the second output terminal g2, and the filtering unit performs filtering processing on the signal outputted by the second output terminal g2, and then outputs the filtered signal to Analog-to-digital signal conversion unit 263.
  • a level converting unit 264 may be further disposed between the calculating unit 265 and the analog-digital signal converting unit 263, and the level converting unit 264 is configured to output the analog-digital signal converting unit 263.
  • the digital signal is level-converted and the level-converted digital signal is output to the computing unit 265.
  • the calculation unit 265 calculates the obtained touch coordinates based on the level-converted digital signal.
  • the calculation unit 265 exchanges a position with the level conversion unit 264, and accordingly, the analog-digital signal conversion unit 263 outputs the converted digital signal to the calculation unit 265.
  • the calculation unit 265 calculates the obtained touch coordinates according to the digital signal, and outputs a signal indicating the touch coordinates to the level conversion unit 264, and the level conversion unit 264 performs level conversion on the signal indicating the touch coordinates. It is also possible to output to the main control chip 3, which is also determined according to the withstand voltage condition of the calculation unit 265 and the analog-digital signal conversion unit 263.
  • FIG. 14 is a schematic structural diagram of still another embodiment of the electronic device 100 .
  • the touch display panel 10 may further include a ground element, such as a ground line L1.
  • the ground line L1 is disposed, for example, around the plurality of pixel points 11.
  • the grounding element is not limited to the ground line L1.
  • the scan driving circuit 28 can be integrated, for example, on the touch display panel 10 (Gate In Panel, GIP). Accordingly, the ground element can also be a ground element in the scan driving circuit 28.
  • the ground line L1 may also be omitted in other embodiments.
  • the driving circuit 20 may further include a first ground end 201 and a second ground end 203.
  • the modulation circuit 21 is connected between the first ground end 201 and the second ground end 203.
  • the first ground end 201 is connected to the ground element on the touch display panel 10.
  • the first ground end 201 is connected to the ground line L1.
  • the second ground end 203 is connected to the device ground and receives the ground signal GND.
  • the modulation circuit 21 outputs the modulation signal MGND to the touch display panel 10 through the first ground terminal 201; in the second time period W2, the modulation circuit 21 passes the first ground
  • the terminal 201 outputs the ground signal GND to the touch display panel 10.
  • the driving circuit 20 may further include, for example, a slope controller 204 coupled to the modulation circuit 21 for controlling a slope of a modulation signal output by the modulation circuit 21 to reduce electromagnetic interference (EMI).
  • a slope controller 204 coupled to the modulation circuit 21 for controlling a slope of a modulation signal output by the modulation circuit 21 to reduce electromagnetic interference (EMI).
  • EMI electromagnetic interference
  • the slope controller 204 is disposed, for example, in a domain 80 referenced to GND. However, in other embodiments, the slope controller 204 can also be omitted.
  • the drive circuit 204 can further include a display processing circuit 205.
  • the display processing circuit 205 is connected between the main control chip 3 and the level conversion unit 264.
  • the level converting unit 264 is further connected to the control circuit 25.
  • the display processing circuit 205 is configured to perform corresponding processing (eg, storage, decompression, color adjustment, etc.) on the display data from the main control chip 3.
  • the level converting unit 264 is disposed between the display processing circuit 205 and the control circuit 25 for level-converting the display data processed by the display processing circuit 205, and outputting the level-converted display data.
  • the control circuit 25 is given.
  • the control circuit 25 outputs corresponding display data and timing signals to the display driving circuit 20a.
  • the display driving circuit 20a converts the received display data into a gray scale voltage, and outputs a first gray scale voltage Vd1 to the corresponding pixel electrode 103 to perform image display refresh in the first period W1 according to the timing signal, in the second period W2 outputs the second gray scale voltage Vd2 to perform image display refresh on the corresponding pixel electrode 103.
  • the display data is preferably a digital signal.
  • the display processing circuit 205 and the control circuit 25 may not need level conversion, but in the first time period W1, in the modulation scheme, since the voltage reference of the domain 80 and the domain 90 is different, level shifting is required.
  • the signal between the calculation unit 265 and the analog-digital signal conversion unit 263 may not Level shifting is performed, but in the first period W1, in the modulation scheme, since the voltage reference of the domain 80 and the domain 90 is different, level shifting is required.
  • the level converting unit 264 can respectively control whether the corresponding signal is level-converted in the first period W1 and the second period W2 by setting the switching element.
  • the switching element or other suitable circuit structure can also be disposed outside of the level shifting unit 264.
  • the division of each of the circuit blocks or circuit units in the drive circuit 20 in the two domains 80, 90 is: a part of the display drive circuit 20a, the touch drive circuit 23, and the signal processing circuit 26 (the operational amplifier 231) Mode
  • the pseudo-digital signal conversion unit 263), the data selection circuit 24, and the control circuit 25 are each divided in a field 90 based on MGND, and in addition, the touch display panel 10 is also divided in the field 90;
  • the circuit 205, the calculation unit 265, the voltage generation circuit 27, and the slope controller 204 are all divided in a domain 80 based on GND;
  • the level conversion unit 264 spans two domains, that is, a portion is in the domain 80, and a portion is in the domain. 90, for those of ordinary skill in the art, according to the description of the present application and the circuit principle, it is possible to determine that the level conversion unit 264 is located in the domain 80 and the domain 90, respectively, and details are not described herein.
  • the division of the drive circuit 20 in the two domains 80, 90 may be other suitable conditions, and is not limited to the division described in the above embodiment.
  • the signal output from the domain 80 to the domain 90 is modulated by the modulation signal MGND, and correspondingly, the signal output from the domain 90 to the domain 80 is also modulated accordingly, for example, the modulation opposite to the modulation signal MGND. Wait.
  • the driving circuit 20 supplies the display driving signal for performing image display to the common electrode 101, that is, a common voltage such as a second common voltage.
  • Vc2 after being modulated by the modulation signal MGND, can be simultaneously applied to drive the common electrode 101 to perform touch sensing, thereby further driving the common electrode 101 to perform touch sensing while ensuring that the touch display panel 10 performs normal image display. It is also possible to improve the signal-to-noise ratio of the touch display device 1, thereby improving the touch sensing accuracy.
  • the electronic device 100 may further include a protection circuit 15 disposed between the domain 80 and the domain 90.
  • the driving circuit 20 further includes a first power terminal 206 and a second power terminal 207.
  • the first power terminal 206 is located in the domain 90.
  • the second power terminal 207 is connected to the power supply terminal 31 of the main control chip 3.
  • the main control chip 3 outputs a power voltage to the second power terminal 207 through the power supply terminal 31.
  • the protection circuit 15 is connected between the second power terminal 207 and the first power terminal 206.
  • the protection circuit 15 When the modulation signal MGND is a driving signal (ie, a second reference signal), the protection circuit 15 correspondingly disconnects the connection between the first power terminal 206 and the second power terminal 207; When the modulation signal MGND is the ground signal GND (ie, the first reference signal), the protection circuit 15 correspondingly closes the connection between the first power terminal 206 and the second power terminal 207.
  • FIG. 15 is a schematic diagram showing the circuit structure of an embodiment of the protection circuit 15.
  • the protection circuit 15 includes a diode J1.
  • the anode of the diode J1 is connected to the second power terminal 207, and the cathode of the diode J1 is connected to the first power terminal 206.
  • the protection circuit 15 further includes a first capacitor Q1 and a second capacitor Q2.
  • the first capacitor Q1 is connected between the anode of the diode J1 and the device ground loaded with the ground signal GND
  • the second capacitor Q2 is connected to the cathode of the diode J1 and the modulation loaded with the modulation signal MGND. Between the ground.
  • the first capacitor Q1 and diode J1 are disposed in domain 80
  • second capacitor Q2 is disposed in domain 90.
  • FIG. 16 is a schematic diagram of a circuit structure of another embodiment of the protection circuit 15.
  • the protection capacitor 15a includes a third active switch 151 and a control unit 153.
  • the third active switch 151 includes a control terminal K3, a first transmission terminal T5, and a second transmission terminal T6.
  • the control terminal K3 of the third active switch 151 is connected to the control unit 153, the first transmission terminal T5 is connected to the second power terminal 207, and the second transmission terminal T6 is connected to the first power terminal 206. .
  • the third active switch 151 is a thin film transistor, a triode, or a metal oxide semiconductor field effect transistor.
  • the protection circuit 15a further includes a first capacitor Q1 and a second capacitor Q2.
  • the first capacitor Q1 is connected between the first transmission terminal T5 and the device ground loaded with the ground signal GND
  • the second capacitor Q2 is connected between the second transmission terminal T6 and the modulation ground loaded with the modulation signal MGND.
  • the modulation circuit 21 can also modulate all the signals of the touch display panel 10 by modulating the power supply or the reference power in the driving circuit 20, without limitation. Modulate the equipment ground.
  • the modulation terminal M of the modulation circuit 21 can be connected or used as the aforementioned first power terminal 206 (when modulating the power supply), in addition to being connectable or used as the aforementioned first ground terminal 201 (when modulating the ground) ).
  • the modulation circuit 21 is connected between the first power terminal 206 and the second power terminal 207 when connected or used as the first power terminal 206.
  • the first power terminal 206 is also referred to as a power supply terminal with respect to the first ground terminal 201, and the voltages applied by the two are kept constant.
  • the driving circuit 20 generally includes a reference power terminal (not shown), when the first power terminal 206 is used to load the first power voltage, When a ground terminal 201 is used to load a second power voltage, the reference power terminal is used to load a third power voltage, and the height of the third power voltage is between the first power voltage and the second power voltage. Meanwhile, the voltage difference between the first power voltage and the second power voltage is kept constant, and the voltage difference between the first power voltage and the third power voltage is kept constant.
  • the reference power supply terminal can also be used or connected to the modulation terminal. That is, one of the power supply terminal, the reference power terminal, and the first ground terminal is used as or connected to the modulation terminal, and correspondingly, the power supply voltage used as or connected to the modulation terminal includes a modulation signal.
  • the modulation terminal M is loaded with a constant voltage, and the driving circuit 20 supplies the second gray scale voltage Vd2 to the pixel electrode 103, provides the second common voltage Vc2 to the common electrode 101, and drives the Touching the display panel 10 to perform image display; in the first time period W1, the modulation terminal M loads a modulation signal, and the driving circuit 20 provides a first gray scale voltage Vd1 to the pixel electrode 103, provides a first common voltage Vc1 to the common electrode 101, and drives The touch display While the panel 10 performs image display, the common electrode 101 is further driven to perform self-capacitance touch sensing.
  • the common electrode 101 is used as a transmitting electrode, for example, the scanning line 281 is used as a receiving electrode, and the common electrode 101 and the scanning line 281 form a mutual capacitance, and the driving circuit 20 can also drive the touch display panel. 10 Perform mutual capacitance touch sensing.
  • the driving circuit 20 may use all of the touch display panel 10 to be synchronously modulated by modulation or modulation power supply or modulation reference power.
  • modulation or modulation power supply or modulation reference power may be used in addition to the manner in which the touch display panel 10 is simultaneously driven to perform image display and touch sensing.
  • non-modulated or non-modulated may also be employed.
  • a non-modulation scheme such as a power supply or a non-modulation reference power source is driven, that is, the electronic device 100 operates in a domain 80 with a reference to the ground signal GND as a voltage reference.

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Abstract

一种具有触摸功能的液晶显示装置（1）和包括其的电子设备（100）。液晶显示装置（1）包括液晶显示面板（10）和驱动电路（20）。液晶显示面板（10）包括多个像素电极（103）；多条扫描线（281）；多条数据线（291）；多个控制开关（105）；和多个公共电极（101）。驱动电路（20）通过提供第一扫描开启信号（Vg1）给扫描线（281），激活与扫描线（281）相连接的控制开关（105），并通过数据线（291）提供第一灰阶电压（Vd1）给像素电极（103），提供相同的第一公共电压（Vc1）给多个公共电极（101），来驱动液晶显示面板（10）执行图像显示刷新的同时，进一步驱动公共电极（101）执行触摸感测。其中，第一扫描开启信号（Vg1）、第一灰阶电压（Vd1）、第一公共电压（Vc1）均为经一调制信号（MGND）同步调制后的信号。

Description

具有触摸功能的液晶显示装置和电子设备 技术领域
本发明涉及触摸显示技术领域，尤其涉及一种具有触摸功能的液晶显示装置以及具有所述液晶显示装置的电子设备。
背景技术
通常，触摸显示装置包括外挂式、On-Cell(盒上型)、In-Cell(盒内型或内嵌式)三种类型的触摸显示面板。随着技术的发展，为了进一步使得触摸显示面板变薄，以及提高触摸显示面板的亮度，In-Cell类型的触摸显示面板逐渐成为趋势。
以触摸显示装置为液晶显示装置为例进行说明，通常，液晶显示装置包括液晶显示面板和用于驱动所述液晶显示面板执行图像显示与触摸感测的驱动电路。所述液晶显示面板包括多条扫描线、多条数据线、和多个晶体管、多个像素电极、和多个公共电极。每一晶体管包括栅极、源极、和漏极。其中，所述栅极连接扫描线，所述源极连接数据线，所述漏极连接像素电极。所述驱动电路用于提供扫描信号给扫描线，激活与扫描线相连接的晶体管，并通过数据线和激活的晶体管提供灰阶电压给像素电极，以及提供公共电压给公共电极，来驱动液晶显示面板执行图像显示刷新。
当所述驱动电路提供所述扫描信号给一扫描线，灰阶电压被传输给与所述扫描线相连接的一行像素电极之后，且在提供所述扫描信号给另一扫描线之前的时间间隙称为行间隙。换句话说，所述驱动电路在提供灰阶电压给一行像素电极之后，在提供灰阶电压给另一行像素电极之前的时间间隙为行间隙。另外，所述驱动电路在提供一帧灰阶电压给所有的像素电极之后，在提供另一帧灰阶电压给所有的像素电极之前的时间间隙也可称为帧间隙。在行间隙、帧间隙，无任何灰阶电压的传输，即，无图像显示刷新，相应地，此时，所述液晶显示面板整个处于图像显示保持的状态。
现有的液晶显示装置一般采用在行间隙对触摸感测电极执行触摸感测。一般地，为了配合执行触摸感测，保证触摸感测的时长，行间隙的时间一般被延长。所述触摸感测电极例如为复用公共电极。当公共电极复用作为触摸感测电极时，所述驱动电路通常提供与公共电压不同的触摸驱动信号给公共电极执行触摸感测。通常，公共电压相对于接地信号GND(例如，0伏)为一恒定的电压信号，所述触摸驱动信号相对于所述接地信号GND为具有预定频率的周期性变化的方波脉冲信号，以提高触摸感测信号的信噪比。可以看出，所述液晶显示装置是分时执行图像显示刷新与触摸感测，从而在一定程度上减少图像显示与触摸感测之间的相互影响。
然，随着所述液晶显示装置的分辨率的逐渐提高，例如，手机的液晶显示装置的分辨率都逐渐采用2K(如，2560x1440)分辨率、甚至更高的分辨率，显示刷新频率一般采用60HZ， 所述行间隙、帧间隙则会被明显压缩，如果再采用仅在行间隙、帧间隙对触摸感测电极执行触摸感测则会因时间明显不够而导致触摸感测不能充分进行的问题。当刷新频率提高至120HZ时，可用于触摸感测的时间就更少。
发明内容
本发明旨在至少解决现有技术中存在的技术问题之一。为此，本发明需要提供一种具有触摸功能的液晶显示装置及电子设备。
本发明提供一种具有触摸功能的液晶显示装置，包括：
液晶显示面板，包括
多个像素电极；
多条扫描线；
多条数据线；
多个控制开关，每一控制开关包括控制电极、第一传输电极、和第二传输电极，其中，所述控制电极与所述扫描线连接，所述第一传输电极与所述数据线连接，所述第二传输电极与所述像素电极连接；和
多个公共电极；和
驱动电路，通过提供第一扫描开启信号给扫描线，激活与扫描线相连接的控制开关，并通过数据线和激活的控制开关提供第一灰阶电压给像素电极，以及提供相同的第一公共电压给所述多个公共电极，驱动所述液晶显示面板同时执行图像显示刷新与触摸感测；
其中，所述第一扫描开启信号、第一灰阶电压、第一公共电压均为经一调制信号同步调制后的信号，所述驱动电路通过提供所述第一公共电压给所述多个公共电极，驱动所述多个公共电极执行图像显示的同时，进一步驱动公共电极执行触摸感测。
可选地，所述第一公共电压相对所述调制信号保持不变。
可选地，当所述驱动电路提供所述第一扫描开启信号给一扫描线时，驱动部分公共电极执行触摸感测。
可选地，所述驱动电路用于驱动所述多个公共电极执行自电容触摸感测。
可选地，当所述驱动电路驱动所述液晶显示面板同时执行图像显示刷新与触摸感测时，所述液晶显示面板上的信号均为经所述调制信号同步调制后的信号。
可选地，所述驱动电路包括调制电路与第一接地端，所述调制电路用于产生所述调制信号，当所述调制电路输出所述调制信号给所述第一接地端时，所述液晶显示面板上的信号均为经所述调制信号同步调制后的信号。
可选地，所述驱动电路通过控制所述调制电路输出所述调制信号给第一接地端，利用所述调制信号同步调制所述液晶显示面板的所有信号，并利用所述第一公共电压驱动公共电极 执行自电容触摸感测，来驱动所述液晶显示面板同时执行图像显示刷新与触摸感测。
可选地，所述驱动电路同时提供相同的第一公共电压给所述多个公共电极，并分时接收来自所述多个公共电极输出的触摸感测信号，以获取触摸信息，其中，所述驱动电路驱动公共电极执行触摸感测的第一公共电压同时用作显示驱动信号与触摸驱动信号。
可选地，所述驱动电路包括触摸驱动电路、公共电压产生电路、和数据选择电路；所述触摸驱动电路通过所述数据选择电路与所述多个公共电极可选择性连接，所述公共电压产生电路通过所述数据选择电路与所述多个公共电极可选择性连接；其中，所述公共电压产生电路用于驱动所述多个公共电极执行图像显示，所述触摸驱动电路用于驱动所述多个公共电极执行图像显示和自电容触摸感测。
可选地，当所述驱动电路驱动所述液晶显示面板同时执行图像显示刷新与自电容触摸感测时，所述多个公共电极接收到的所述第一公共电压分别来自所述公共电压产生电路和所述触摸驱动电路。
可选地，所述公共电压产生电路包括：
信号源，包括接地端和输出端，所述接地端与所述第一接地端连接；
第一放大器，包括第三电源端、第三接地端、第一同相端、第一反相端、和第一输出端，其中，所述第三电源端用于加载电源电压，所述第三接地端与所述第一接地端连接，所述第一同相端连接所述信号源的输出端，所述第一反相端与所述第一输出端连接，所述第一输出端用于通过数据选择电路与公共电极可选择性连接；和
稳压电容，包括相对的第一极板和第二极板，其中，第一极板连接在数据选择电路与第一输出端之间，第二极板连接至所述第一接地端。
可选地，所述触摸驱动电路包括：
所述信号源；和
多个运算放大器，每一运算放大器包括第二放大器和反馈支路；每一第二放大器包括第四电源端、第四接地端、第二同相端、第二反相端、和第二输出端，其中，所述第四电源端用于加载电源电压，所述第四接地端与所述第一接地端连接，所述第二同相端连接所述信号源的输出端，所述第二反相端通过反馈支路与所述第二输出端连接，所述第二反相端进一步通过数据选择电路与公共电极可选择性连接。
可选地，所述驱动电路进一步包括信号处理电路，所述第二输出端进一步连接所述信号处理电路，所述信号处理电路用于接收来自触摸驱动电路输出的触摸感测信号，以获得触摸信息。
可选地，所述多个像素电极与所述多个公共电极均呈二维阵列排布，当所述驱动电路驱动所述液晶显示面板同时执行图像显示刷新与自电容触摸感测时，在同一时刻，执行触摸感测的公共电极所正对的像素电极与执行图像显示刷新的像素电极之间间隔多行处于图像显示 保持状态的像素电极。
可选地，所述驱动电路进一步用于通过提供第二扫描开启信号给扫描线，激活与扫描线相连接的控制开关，并通过数据线和激活的控制开关提供第二灰阶电压给像素电极，以及提供第二公共电压给公共电极，来驱动液晶显示面板执行图像显示刷新而非同时执行触摸感测。
可选地，所述第二扫描开启信号为所述第一扫描开启信号经所述调制信号调制后的信号，所述第一公共电压为所述第二公共电压经所述调制信号调制后的信号。
可选地，定义存在公共电极执行触摸感测的时段为第一时段，定义所述多个公共电极均执行图像显示而非同时执行触摸感测的时段为第二时段，所述第一时段与所述第二时段交替进行；所述驱动电路输出至所述液晶显示面板上的信号均是以所述第一接地端上的信号为电压参照基准；在第一时段，所述调制电路输出所述调制信号给第一接地端；在第二时段，所述调制电路输出接地信号给第一接地端。
可选地，当所述驱动电路驱动所述液晶显示面板同时执行图像显示刷新与触摸感测时，所述信号源的输出端输出与所述第一公共电压相同的第一参考电压信号给第一同相端和第二同相端。
本发明还提供一种电子设备，所述电子设备包括上述中任意一项所述的液晶显示装置。
由于所述驱动电路能驱动所述液晶显示面板同时执行图像显示刷新与触摸感测，因此，所述液晶显示装置执行触摸感测的时间相对变长。相应地，具有所述液晶显示装置的电子设备的用户体验较好。
附图说明
图1为本发明电子设备的结构示意简图。
图2为图1所示电子设备的部分信号的一实施方式的波形示意图。
图3为图1所示电子设备的一实施方式的电路结构示意图。
图4为图3所示调制电路的一实施方式的电路结构示意图。
图5为现有的触摸驱动电路的信号源的电路结构示意图。
图6为图3所示触摸驱动电路的信号源的电路结构示意图。
图7为图1所示电子设备的一具体实施方式的电路结构示意图。
图8为图7所示触摸显示面板的一实施方式的分解结构示意图。
图9为图8所示触摸显示面板的剖面结构示意图。
图10为图7所示触摸显示面板的另一实施方式的剖面结构示意图。
图11为图10所示触摸显示面板的俯视示意图。
图12为图3所示信号处理电路的一实施方式的结构框图。
图13为图12所示信号处理电路的一信号处理单元的一实施方式的结构示意图。
图14为本发明电子设备的又一实施方式的结构示意图。
图15为图14所示保护电路的一实施方式的电路结构示意图。
图16为保护电路的另一实施方式的电路结构示意图。
具体实施方式
为使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本发明将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。为了方便或清楚，可能夸大、省略或示意地示出在附图中所示的每层的厚度和大小、以及示意地示出相关元件的数量。另外，元件的大小不完全反映实际大小，以及相关元件的数量不完全反映实际数量。因为附图大小不同等原因，在不同的附图中所示的相同或相似或相关元件的数量存在并不一致的情况。在图中相同的附图标记表示相同或类似的结构。然，需要说明的是，为了使得标号具有规律性以及逻辑性等，在某些不同实施例中，相同或类似的元件或结构采用了不同的附图标记，根据技术的关联性以及相关文字说明，本领域的技术人员是可直接或间接判断得知。
此外，所描述的特征、结构可以以任何合适的方式结合在一个或更多实施方式中。在下面的描述中，提供许多具体细节从而给出对本发明的实施方式的充分理解。然而，本领域技术人员应意识到，没有所述特定细节中的一个或更多，或者采用其它的结构、组元等，也可以实践本发明的技术方案。在其它情况下，不详细示出或描述公知结构或者操作以避免模糊本发明。
进一步地，下列术语是示例性的，并非旨在以任何方式进行限制。在阅读本申请之后，本领域技术人员将认识到，这些术语表述适用于技术、方法、物理元件以及系统(无论目前是否知晓)，包括阅读本申请之后本领域技术人员推断出或者可推断的其扩展。
在本发明的描述中，需要理解的是：“多个”包括两个和两个以上，“多条”包括两条和两条以上，“多颗”包括两颗和两颗以上，“多行”包括两行和两行以上，“多列”包括两列和两列以上，除非本申请另有明确具体的限定。另外，各元件名称以及信号名称中出现的“第一”、“第二”、“第三”、“第四”等词语并不是限定元件或信号出现的先后顺序，而是为方便元件命名，清楚区分各元件，使得描述更简洁易懂。为了避免理解混淆，需要进一步预先说明的有：
对于显示装置而言，显示装置包括显示面板和驱动电路。所述驱动电路用于驱动所述显示面板执行图像显示。所述显示面板通常包括多个像素点，每一像素点包括第一电极和第二电极，工作时，所述第一电极与所述第二电极之间的压差决定像素点的显示灰度级别。其中，所述多个像素点的第一电极例如为彼此连接为一体的结构，是一整层电极，所述多个像素点 的第二电极为彼此分立的结构。所述驱动电路通过给所述各像素点的第一电极提供相同的电压(例如为0伏)，给所述各像素点的第二电极提供不同的电压，从而可实现不同灰阶的图像显示。
当所述显示装置为液晶显示装置时，所述第一电极为公共电极，所述第二电极为像素电极。所述驱动电路通过提供公共电压给第一电极、提供灰阶电压给第二电极来驱动液晶显示面板执行图像显示。可变更地，所述显示装置也可为其它合适类型的显示装置，例如电子纸显示装置等。
对于每一像素点而言，其图像显示状态一般包括图像显示刷新状态和图像显示保持状态。以单一像素点为例，当所述驱动电路提供灰阶电压给第二电极、提供公共电压给第一电极时，所述像素点开始执行图像显示刷新，当所述灰阶电压写入至第二电极之后，停止提供灰阶电压给所述第二电极，图像显示刷新完成。之后，所述像素点进入图像显示保持状态，直至所述像素点下一次接收到灰阶电压。
需要说明的是，图像显示刷新的过程可进一步包括对第二电极进行预充电或预放电，当同一行的第二电极达到同一电压后再提供实现预定灰阶画面的灰阶电压给第二电极。
可以看出，对于图像显示刷新而言，即为第一电极在接收公共电压时，第二电极有灰阶电压写入的过程。
一般地，所述多个像素点例如呈行列式排布。所述驱动电路通常逐行或按行驱动像素点执行图像显示刷新。
此处指出图像显示刷新与图像显示保持这两种不同的显示状态，是为更好理解下面所述本发明的各实施方式做准备。另外，更明确“图像显示刷新”与“图像显示保持”是两种不同的技术概念。
需要说明的是，第一电极、第二电极在不同类型的显示装置中的具体叫法有所不同，对于适用本申请的各合适类型的显示装置，统一称第一电极为公共电极，统一称第二电极为像素电极。相应地，所述驱动电路提供给第一电极的显示电压信号为公共电压，提供给第二电极的显示电压信号为灰阶电压。
触摸屏一般包括电阻式、电容式、红外线式等几种类型的触摸屏，其中，电容式触摸屏的应用更为广泛。电容式触摸屏又包括互电容式触摸屏和自电容式触摸屏。
在基于互电容的触摸系统中，触摸屏可包括(例如)驱动区及感测区，诸如驱动线及感测线。在一实例情况中，驱动线可形成多行，而感测线可形成多列(例如，正交)。触摸像素可设置于行与列的交叉点处。在操作期间，可用交流信号(AC)波形来激励所述行，且互电容可形成于该触摸像素的行与列之间。在一物件接近该触摸像素时，耦合于该触摸像素的行与列之间的一些电荷可改为耦合至该物件上。耦合于该触摸像素上的电荷的此减少可导致行与列之间的互电容的净减少及耦合于该触摸像素上的AC波形的减少。电荷耦合AC波形的此减 少可由触摸系统检测并测量以判定该物件在触摸该触摸屏时的位置。
相对地，在基于自电容的触摸系统中，每一触摸像素可由形成对地的自电容的个别电极形成。在一物件接近该触摸像素时，另一对地电容(capacitance to ground)可形成于该物件与该触摸像素之间。该另一对地电容可导致该触摸像素所经受的自电容的净增加。此自电容增加可由触摸系统检测并测量以判定该物件在触摸该触摸屏时的位置。
下面，对本发明的各实施例进行说明。
请一并参阅图1和图2，图1为本发明电子设备的结构示意简图。图2为图1所示电子设备的部分信号的一实施方式的波形示意图。所述电子设备100如为可携式电子产品、智能家居电子产品、以及车载电子产品等各种合适类型的产品，本发明对此不作限制。所述可携式电子产品例如为手机、平板电脑、笔记本电脑、穿戴式设备等。所述智能家居电子产品例如为台式电脑、冰箱、洗衣机、电视等。所述车载电子产品例如为导航仪、车载DVD等等。所述电子设备100包括触摸显示装置1。所述触摸显示装置1用于实现图像显示与触摸感测。所述触摸显示装置1为In-Cell(盒内型或内嵌式)类型的触摸显示装置。所述触摸显示装置1中的显示装置例如为液晶显示装置。相应地，所述触摸显示装置1为触摸液晶显示装置。下面主要以触摸液晶显示装置为例进行说明。然，可变更地，所述触摸显示装置1中的显示装置也可为其它合适类型的显示装置，如，电子纸显示装置(EPD)等。
所述触摸显示装置1包括触摸显示面板10和驱动电路20。所述触摸显示面板10包括多个公共电极101。所述多个公共电极101用作显示电极和触摸感测电极。所述驱动电路20和所述多个公共电极101分别连接，用于驱动所述多个公共电极101执行图像显示，还用于驱动所述多个公共电极101执行触摸感测。较佳地，所述驱动电路20用于驱动所述多个公共电极101执行自电容触摸感测。然，本发明并不局限于此，所述驱动电路20还可用于驱动所述多个公共电极101执行其它合适类型的触摸感测，例如为互电容触摸感测，只要是基于本申请所揭示的技术思想而做的其它变更或扩展均应落入本申请的保护范围。
所述多个公共电极101例如呈二维阵列排布，具体地，所述多个公共电极101沿X方向和Y方向呈多行多列排布，其中，所述X方向为行方向，所述Y方向为列方向。然，可变更地，在其它实施方式中，所述多个公共电极101也可呈其它规则或非规则方式排布，本发明对此并不做限制。
所述驱动电路20用于在驱动所述触摸显示面板10执行图像显示的任意过程中，均可进一步驱动公共电极101执行自电容触摸感测。因此，即使当触摸显示装置1的显示分辨率提高，也并不会缩短触摸感测的时间，进而，打破显示分辨率增加所带来的触摸感测时间不够的技术瓶颈。相应地，所述电子设备100的用户使用体验较好。
尤其地，所述驱动电路20在驱动触摸显示面板10执行图像显示刷新的同时，可进一步驱动公共电极101执行自电容触摸感测。从而，触摸显示装置1的触摸感测并不局限在行间 隙I、帧间隙进行。
当所述驱动电路20驱动触摸显示面板10同时执行图像显示与触摸感测时，所述触摸显示面板10上的所有电信号均为经一调制信号MGND调制后的信号。所述触摸显示面板10上的各电信号例如均随所述调制信号MGND的升高而升高，随所述调制信号MGND的降低而降低。
所述驱动电路20例如通过利用所述调制信号MGND同步调制所述触摸显示面板10的所有信号，来驱动所述触摸显示面板10执行图像显示的同时，进一步驱动所述多个公共电极101执行自电容触摸感测。
当所述驱动电路20驱动触摸显示面板10同时执行图像显示与触摸感测时，所述触摸显示面板10上的元件或被所述驱动电路20直接驱动，或被所述驱动电路20间接驱动。以触摸显示面板10上的一元件为例，当所述元件被所述驱动电路20直接驱动时，所述元件上的信号为来自驱动电路20输出的经调制信号MGND调制后的信号；当所述元件未被驱动电路20直接驱动时，则例如通过电容耦合被驱动电路20间接驱动，电容耦合存在于被驱动电路20直接驱动的元件与被驱动电路20间接驱动的元件之间，相应地，所述元件的信号因电容耦合叠加所述调制信号MGND。从而，所述触摸显示面板10上的所有电信号均为经所述调制信号MGND调制后的信号。除了电容耦合，所述触摸显示面板10中的元件例如还可通过电阻等元件被驱动电路20间接驱动。
然，可变更地，在其它实施方式中，所述触摸显示面板10上的所有电信号也可均为来自驱动电路20输出的调制后的信号。
所述驱动电路20例如提供相同的第一公共电压Vc1给所述多个公共电极101执行图像显示的同时，可进一步驱动公共电极101执行自电容触摸感测。所述第一公共电压Vc1为经所述调制信号MGND调制后的信号。例如，所述第一公共电压Vc1与所述调制信号MGND之间的压差保持不变。所述第一公共电压Vc1相对所述调制信号MGND保持不变。然，可变更地，所述第一公共电压Vc1也可为与所述调制信号Vc1之间的压差相对变化的信号。较佳地，所述第一公共电压Vc1相对接地信号GND为变化的信号。所述接地信号GND例如为0V(伏)的恒定电压信号，但不局限于0V的恒定电压信号，也可为接近0V的恒定电压信号，所述接地信号GND通常为电子设备100的设备地上的电压信号。所述设备地又称系统地，例如为电子设备100的供电电源的负极，供电电源如为电池。所述接地信号GND又称系统地电压、系统地信号、设备地电压、或设备地信号等。通常，所述设备地并非地球大地或绝对大地。然，当电子设备100通过导体与地球大地连接时，所述设备地也可能为地球大地。
以一个公共电极101为例，当驱动电路20驱动所述公共电极101同时执行图像显示与触摸感测时，提供给所述公共电极101的第一公共电压Vc1同时用作显示驱动信号与触摸驱动信号；当驱动电路20驱动所述公共电极101执行图像显示而非同时执行触摸感测时，提供给 所述公共电极101的第一公共电压101用作显示驱动信号而非同时用作触摸驱动信号。
所述驱动电路20可驱动所述多个公共电极101分时执行触摸感测，也可驱动所述多个公共电极101同时执行触摸感测。
相应地，当所述驱动电路20驱动所述多个公共电极101同时执行触摸感测时，提供给所述多个公共电极101的第一公共电压Vc1都同时用作触摸驱动信号；当所述驱动电路20驱动所述多个公共电极101分时执行触摸感测时，提供给所述多个公共电极101的第一公共电压Vc1并不是都同时用作触摸驱动信号。因此，也可称驱动电路20驱动公共电极101执行触摸感测的第一公共电压Vc1为触摸驱动信号。
当所述驱动电路20分时驱动所述多个公共电极101执行触摸感测时，虽然所述驱动电路20提供相同的第一公共电压Vc1给所述多个公共电极101，但是所述驱动电路20中驱动公共电极101同时执行图像显示与触摸感测的电路结构与驱动公共电极101执行图像显示而非同时执行触摸感测的电路结构是不同的。
由于所述触摸显示面板10上的所有电信号均为经所述调制信号MGND同步调制后的信号，因此，所有电信号中经调制后的显示驱动信号能够驱动所述触摸显示面板10执行正常图像显示，而且经调制后的显示驱动信号，例如，第一公共电压Vc1，可进一步同时适用于驱动公共电极101执行自电容触摸感测。相应地，所述驱动电路20在驱动触摸显示面板10执行图像显示的任意过程中，均可驱动触摸显示面板10执行触摸感测，且所述触摸感测不会影响图像的正常显示。进一步地，即使当触摸显示装置1的显示分辨率提高，也并不会缩短触摸感测的时间，从而提高电子设备100的用户使用体验。
为了更好地理解，可先参见图7，对于像素点11的公共电极101与像素电极103之间的显示压差而言，公共电极101与像素电极103上的信号当被所述调制信号MGND同步调制后，显示压差不会改变，图像正常显示，而提供给公共电极101的第一公共电压Vc1是经所述调制信号MGND调制后的信号，所述第一公共电压Vc1相对于接地信号GND为变化的信号，从而，在确保触摸显示面板10正常显示图像的过程中能同时驱动公共电极101执行自电容触摸感测。
对于执行图像显示刷新的像素点11和执行图像显示保持的像素点11而言，执行图像显示刷新的像素点11的像素电极103上的信号为来自驱动电路20所提供的调制后的信号，执行图像显示保持的像素点11的像素电极103上的信号因电容耦合叠加所述调制信号MGND。
所述触摸显示装置1例如为高清(HD)显示装置、全高清(FHD)显示装置、超高清(UHD)显示装置等各种类型的显示装置，对应地，显示分辨率例如为1280x720、1920x1080、3840x2160，然，所述显示分辨率并不局限于此，例如，当显示分辨率为2K时，2K可为1920x1080，然，也可为2560X1440等各种合适情况。类似地，当显示分辨率为4K、8K时，也可包括多种情况，然，对于触摸显示装置1均是可在图像显示的任意过程中，能够同时执 行触摸感测，且触摸感测不影响正常的图像显示。即，触摸显示装置1可同时执行图像显示与自电容触摸感测。
尤其地，所述驱动电路20在驱动所述触摸显示面板10执行图像显示刷新时，可驱动公共电极101一同执行自电容触摸感测，获取触摸信息。图像显示刷新与自电容触摸感测之间可同时共存，且触摸显示装置1的图像显示与触摸感测的品质较高。
由于所述触摸显示面板10上的信号被所述调制信号MGND同步调制，且经调制后的第一公共电压Vc1可同时用作显示驱动信号与触摸驱动信号，因此，所述触摸显示装置1可同时执行图像显示刷新与自电容触摸感测，且所述触摸显示装置1的图像显示与触摸感测之间并不存在干扰或干扰较小。
另外，当所述触摸显示面板10在所述驱动电路20的驱动下处于非图像显示刷新的状态时，例如，行间隙I(见图2所示)、帧间隙时，所述驱动电路20也可驱动公共电极101一同执行自电容触摸感测。此时，所述触摸显示面板10整个处于图像显示保持的状态，由于采用所述调制信号MGND对驱动电路20输出给触摸显示面板10的信号进行同步调制，因此，执行触摸感测并不会改变像素点11(见图7)的两个电极101、103之间的显示压差，相应地，触摸显示面板10的图像显示与触摸感测的品质较好。
由于所述驱动电路20在驱动所述触摸显示面板10执行图像显示的任意过程中、均可驱动公共电极101一同执行触摸感测，因此，厂商可根据需要自行设定所述驱动电路20驱动公共电极101执行触摸感测的时段。具体地，例如，在图像显示的整个过程或部分过程中，执行触摸感测。更具体地，例如，在图像显示刷新期间和/或行间隙I、帧间隙期间，执行触摸感测，等等。
在本实施方式中，所述驱动电路20同时驱动所述多个公共电极101执行图像显示，以及分时驱动所述多个公共电极101执行自电容触摸感测。
需要说明的是，对于所述多个公共电极101作为整体而言，所述驱动电路20是分时驱动所述多个公共电极101执行自电容触摸感测的。然，对于所述多个公共电极101中的部分公共电极101而言，所述驱动电路20可是同时驱动部分公共电极101执行触摸感测的。例如，所述驱动电路20每次同时驱动所述多个公共电极101中的一部分公共电极101执行触摸感测，通过先后多次驱动，完成对所有公共公共电极101的一次触摸感测。然，可变更地，所述驱动电路20也可每次驱动一公共电极101执行触摸感测。
在本申请中，不管是驱动电路20每次驱动一公共电极101执行触摸感测，还是每次同时驱动部分公共电极101执行触摸感测，只要所述驱动电路101通过先后多次驱动所述多个公共电极101执行完一次触摸感测，即定义所述驱动电路20为分时驱动所述多个公共电极101执行触摸感测。
具体地，所述驱动电路20同时提供所述第一公共电压Vc1给所述多个公共电极101，并 分时接收来自所述多个公共电极101输出的触摸感测信号，以实现同时驱动所述多个公共电极101执行图像显示，以及分时驱动所述多个公共电极101执行自电容触摸感测。
然，可变更地，在其它实施方式中，所述驱动电路20也可同时驱动所述多个公共电极101均执行图像显示与触摸感测。
对于所述驱动电路20分时驱动所述多个公共电极101执行自电容触摸感测，例如可为：所述驱动电路20按行驱动公共电极101执行自电容触摸感测。当所述驱动电路20提供所述第一公共电压Vc1给一行公共电极101执行自电容触摸感测与图像显示时，也提供所述第一公共电压Vc1给其余行的公共电极101执行图像显示。当所述驱动电路20驱动一行公共电极101执行完自电容触摸感测后，接下来，驱动另一行的公共电极101执行自电容触摸感测与图像显示，并驱动其余行的公共电极101执行图像显示。如此，通过先后多次，完成对所有的公共电极101的一次触摸感测驱动。
所述驱动电路20可逐行驱动公共电极101执行图像显示与触摸感测，也可一次同时驱动多行公共电极101执行图像显示与触摸感测。
由于所述驱动电路20分时(如，按行或逐行)驱动公共电极101执行自电容触摸感测，因此，集成有所述驱动电路20的芯片的输出引脚则相较于同时驱动所有的公共电极101执行自电容触摸感测的芯片的输出引脚要少，从而可减小集成有所述驱动电路20的芯片的面积，进而达到节省成本的目的。
在不同的实施方式中，所述驱动电路20可一次驱动一行公共电极101执行触摸感测，也可一次驱动多行公共电极101执行触摸感测，又可一次驱动所有的公共电极101同时执行触摸感测。另外，所述驱动电路20也可并非按行驱动公共电极101执行触摸感测，例如，按列驱动公共电极101执行触摸感测或按非规律的驱动方式来驱动公共电极101执行触摸感测等等情况也是可以的。
进一步地，对于驱动电路20分时驱动所述多个公共电极101执行自电容触摸感测：所述驱动电路20各次驱动公共电极101执行触摸感测之间是连续不间断的，即，驱动电路20在同时驱动部分公共电极101执行完触摸感测之后，接着，同时驱动另一部分公共电极101执行触摸感测；或者，驱动电路20间歇性驱动所述多个公共电极101执行自电容触摸感测，如，驱动电路20在驱动公共电极101执行触摸感测达第一预定时间之后，停止执行触摸感测驱动达第二预定时间，接着，再驱动公共电极101执行触摸感测。
然，当所述驱动电路20同时驱动所述多个公共电极101执行触摸感测时，也可采用间歇性的驱动方式。即，当所述驱动电路20同时驱动所述多个公共电极101执行触摸感测达第一预定时间之后，停止执行触摸感测驱动达第二预定时间，接着，再同时驱动所述多个公共电极101执行触摸感测。
所述驱动电路20也可采用分时驱动与同时驱动相结合的方式对所述多个公共电极101执 行触摸感测也是可以的。
需要说明的是，所述驱动电路20在相邻两次驱动执行触摸感测的公共电极101可部分重叠或不相重叠。
尤其地，对于所述驱动电路20间歇性驱动所述多个公共电极101执行自电容触摸感测的方式，定义存在公共电极101执行触摸感测的时段为第一时段W1，定义所述多个公共电极101均执行图像显示而非同时执行触摸感测的时段为第二时段W2。相邻的第一时段W1之间包括第二时段W2。例如，所述第一时段W1与所述第二时段W2交替进行。
在第一时段W1，所述驱动电路20利用所述调制信号MGND同步调制所述触摸显示面板10的信号，相应地，所述驱动电路20输出经调制后的第一公共电压Vc1给公共电极101同时执行图像显示和自电容触摸感测。
为了便于与下述的第二时段W2的信号进行清楚区分，定义所述驱动电路20在第一时段W1输出给所述触摸显示面板10的信号均为第一信号，定义所述驱动电路20在第二时段W2输出给所述触摸显示面板10的信号均为第二信号。相应地，所述第一信号包括所述第一公共电压Vc1。
在每一第二时段W2，所述驱动电路20输出第二信号给所述触摸显示面板10执行图像显示。
较佳地，在第二时段W2，所述驱动电路20并不利用所述调制信号MGND同步调制所述触摸显示面板10的信号。相应地，所述第一信号例如为所述第二信号经所述调制信号MGND调制后的信号。所述驱动电路20输出所述第一信号给所述触摸显示面板10同时执行图像显示与自电容触摸感测。
所述第二信号包括第二公共电压Vc2。在第二时段W2，所述驱动电路20输出第二公共电压Vc2给所述多个公共电极101执行图像显示。
所述第一公共电压Vc1例如为所述第二公共电压Vc2经所述调制信号MGND调制后的信号。所述第二公共电压Vc2相对接地信号GND例如为不变的电压信号。对于液晶显示装置而言，所述第二公共电压Vc2例如为(-1)V，然，对于其它类型的显示装置而言，所述第二公共电压Vc2也可为其它大小的电压信号。所述调制信号MGND例如为0伏到1.8伏之间变化的信号。然，本发明并不局限于此，所述调制信号MGND、所述第二公共电压Vc2等信号也可为其它合适类型的信号，下面会有相关说明。
由于在第二时段W2，所述驱动电路20并不利用所述调制信号MGND同步调制所述触摸显示面板10的信号，例如，采用现有的显示驱动方式进行驱动，因此，所述触摸显示装置1在第二时段W2相较于在第一时段W1采用调制的技术方案要相对降低功耗。
由上述可知，驱动电路20采用间歇性驱动所述多个公共电极101执行触摸感测的方式，所述触摸显示装置1不仅在执行图像显示的任意过程中可执行自电容触摸感测，也可尽量避 免因采用调制方案而导致功耗较大。
在第一时段W1，所述驱动电路20例如驱动多行公共电极101执行完触摸感测，或者，驱动所有的公共电极101执行完一次触摸感测，或者，驱动所有的公共电极101执行完多次触摸感测。对于所述驱动电路20驱动所有的公共电极101执行完多次触摸感测的情况又可分为多种情况，例如，所述驱动电路20驱动所有的公共电极101执行完触摸感测的次数相同，或者，所述驱动电路20驱动一部分公共电极101执行完触摸感测的次数相同，驱动另一部分公共电极101执行完触摸感测的次数相同，然，所述驱动电路20驱动这两部分公共电极101执行完触摸感测的次数不同。
需要说明的是：第二时段W2的时长设置需对所述触摸显示装置1整体检测触摸操作并不存在影响，相反还可在一定程度上降低功耗。
各第一时段W1的时长例如相同，各第二时段W2的时长例如相同。然，所述各第一时段W1的时长也可并不完全相同或彼此均不同，所述各第二时段W2的时长也可并不完全相同或彼此均不同。另外，对于不同类型的触摸显示装置1、对于尺寸不同的触摸显示装置1、对于材料不同的触摸显示装置1的第一时段W1、第二时段W2也可对应不同。进一步地，对于所述触摸显示装置1工作在不同的状态，例如，黑屏待机状态与亮屏图像显示状态，所述第一时段W1、第二时段W2的时长设置也可不同，以降低功耗。
然，可变更地，在一些实施方式中，在第二时段W2，所述驱动电路20也可依然采用所述调制信号MGND同步调制所述触摸显示面板10的信号进行显示驱动。
下面主要以驱动电路20间歇性且分时驱动所述多个公共电极101执行触摸感测的方式，对触摸显示装置1及其工作原理进行说明。
请参阅图3，图3为所述电子设备100的一具体实施方式的电路结构示意图。所述驱动电路20包括调制电路21、公共电压产生电路22、触摸驱动电路23、数据选择电路24、控制电路25、和信号处理电路26。所述公共电压产生电路22和所述触摸驱动电路23连接所述数据选择电路24。所述数据选择电路24连接所述多个公共电极101。所述控制电路25与所述数据选择电路24相连接。所述公共电压产生电路22和所述触摸驱动电路23通过所述数据选择电路24可选择性连接相应的公共电极101。
所述公共电压产生电路22用于驱动公共电极101执行图像显示。
触摸驱动电路23用于驱动同一公共电极101同时执行图像显示与自电容触摸感测。
所述信号处理电路26用于根据所述触摸驱动电路23所输出的触摸感测信号进行触摸坐标计算，获取触摸位置信息。
所述数据选择电路24在所述控制电路25的控制下，对应选择输出所述公共电压产生电路22所产生的信号给相应的公共电极101执行图像显示，以及选择输出所述触摸驱动电路23所产生的信号给相应的公共电极101执行图像显示与自电容触摸感测。
所述控制电路25例如根据主控芯片3的控制信号，对应控制所述数据选择电路24的信号输出时序。
所述调制电路21用于产生所述调制信号MGND。所述调制信号MGND例如为方波脉冲信号，包括第一参考信号与第二参考信号。所述第一参考信号与第二参考信号的电压情况可为下述五种情况中的任意一种：
第一：第一参考信号的电压为正电压，第二参考信号的电压为0V；
第二：第一参考信号的电压为0V，第二参考信号的电压为负电压；
第三：第一参考信号的电压为正电压，第二参考信号的电压为负电压，所述第一参考信号的电压的绝对值等于或不等于所述第二参考信号的电压的绝对值；
第四：第一参考信号、第二参考信号的电压为大小不同的正电压；
第五：第一参考信号、第二参考信号的电压为大小不同的负电压。
以接地信号GND为参照，所述第一参考信号、第二参考信号均为恒定电压信号。所述调制信号为第一参考信号与第二参考信号交替出现的方波脉冲信号。
所述调制信号MGND例如为周期性变化的方波脉冲信号。所述调制信号MGND并不局限于方波脉冲信号，也可为其它合适的波形信号，例如，正弦波信号、二级阶梯信号等等。所述调制信号MGND也并不局限于周期性变化的信号，也可为非周期变化的信号。
在本实施方式中，所述调制信号MGND的第一参考信号为接地信号GND，所述第二参考信号为高于第一参考信号的驱动信号。比如，所述接地信号GND为0V，所述驱动信号为1.8V。然，所述接地信号为0V、所述驱动信号为1.8V只是一个示例，可根据产品的情况做对应幅度的调整，本发明对此并不做限制。
具体地，所述驱动电路20可进一步包括电压产生电路27。所述电压产生电路27用于产生所述第二参考信号。所述调制电路21连接所述电子设备100的设备地和所述电压产生电路22，接收所述设备地上的接地信号GND与所述电压产生电路22产生的第二参考信号，对应产生所述调制信号MGND。为区别接地信号GND，所述调制信号被标示为MGND。
在本实施方式中，所述驱动电路20通过提供所述调制信号MGND给驱动电路20中的一部分地，来达到同步调制触摸显示面板10的所有信号。即，只要这部分地上的信号为调制信号MGND，所述触摸显示面板10的所有信号均同步变为经所述调制信号MGND调制后的信号。
定义在第一时段W1施加有调制信号MGND的地为调制地，以区别施加有接地信号GND的设备地。相应地，在第一时段W1，所述电子设备100是以两个域为电压参考基准。两个域分别示出为以接地信号GND为基准的域80和以调制信号MGND为基准的域90。其中，在以接地信号GND为基准的域80中的电路的接地端用于加载接地信号GND，在以调制信号MGND为基准的域90中的电路的接地端用于加载调制信号MGND。进一步地，对于以调制 地为地的电路，其参考地电位为调制地所加载的调制信号MGND；对于以设备地为地的电路，其参考地电位为设备地所加载的接地信号GND。
即，在第一时段W1，调制地由接地信号GND被调制为调制信号MGND，以调制地所加载的调制信号MGND为参考基准的所有信号均被调制信号MGND所调制。
相对地，在第二时段W2，所述电子设备100是以一个域为电压参考基准，均以接地信号GND为电压参考基准。所述电子设备100中的电路的地均连接设备地，接收接地信号GND。即，在第二时段W2，所述调制地对应变为设备地，用于传输接地信号GND而非调制信号MGND。
预先说明的是，在本实施方式中，在第一时段W1，所述公共电压产生电路22、触摸驱动电路23、数据选择电路24、和控制电路25位于所述域90中，所述调制电路21和电压产生电路27位于所述域80中。所述信号处理电路26的一部分位于域80中，一部分位于域90中。
所述调制电路21包括调制端M。所述调制电路21通过所述调制端M输出所述调制信号MGND给到域90中的各电路的接地端，从而，以调制信号MGND为电压参照基准的域90中的电路输出经调制信号MGND调制后的信号给所述触摸显示面板10。其中，所述调制端M连接调制地，或作为调制地的一端。另外，触摸显示面板10上例如处于悬空状态的元件(如，后述执行图像显示保持的像素电极103，见图7)上的信号如因电容耦合作用叠加所述调制信号MGND。因此，在第一时段W1，所述触摸显示面板10上的所有电信号均变为经所述调制信号MGND调制后的信号。
在域90中的电路，例如，所述公共电压产生电路22、触摸驱动电路23、数据选择电路24、控制电路25、所述信号处理电路26中的部分电路，若包括接地端，则接地端可直接连接至调制地。
在第二时段W2，所述调制电路21、公共电压产生电路22、触摸驱动电路23、数据选择电路24、控制电路25、信号处理电路26、电压产生电路27均是以接地信号GND为电压参考基准。
相应地，在第一时段W1，所述调制电路21根据设备地上的接地信号GND和来自所述电压产生电路27的驱动信号对应产生所述调制信号MGND，并提供所述调制信号MGND给所述调制地。所述公共电压产生电路22对应产生所述第一公共电压Vc1，并通过所述数据选择电路24提供给相应的公共电极101执行图像显示。所述触摸驱动电路23对应产生所述第一公共电压Vc1，并通过所述数据选择电路24提供给相应的公共电极101执行图像显示与自电容触摸感测。所述信号处理电路26接收来自所述触摸驱动电路23输出的触摸感测信号，以获取触摸信息。即，所述触摸驱动电路23输出给公共电极101的第一公共电压Vc1同时用作显示驱动信号与触摸驱动信号，所述公共电压产生电路22输出给公共电极101的第一公 共电压Vc1仅用作显示驱动信号。
所述触摸驱动电路23与公共电压产生电路22输出给所述多个公共电极101的第一公共电压Vc1为经所述调制信号MGND调制后的相同信号，且所述触摸驱动电路23能够进一步传输来自公共电极101所感测到的触摸感测信号给信号处理电路26，以获取触摸信息，因此，所述驱动电路20能够驱动触摸显示面板10同时执行图像显示与自电容触摸感测。
由于所述触摸驱动电路23提供给公共电极101的第一公共电压Vc1既用作触摸驱动信号，又用作显示驱动信号，因此，在所述公共电压产生电路22驱动部分公共电极101执行图像显示时，所述触摸驱动电路23可一同驱动其余公共电极101执行图像显示与自电容触摸感测。因此，本发明的触摸显示装置1在执行图像显示的任意过程之中，均可同时执行触摸感测，且，触摸感测与图像显示之间无干扰或对图像显示造成的干扰较少。
进一步地，在第二时段W2，所述公共电压产生电路22通过所述数据选择电路24提供第二公共电压Vc2给所述多个公共电极101执行图像显示。
较佳地，在第二时段W2，通过所述控制电路25控制所述数据选择电路24，所述多个公共电极101上的第二公共电压Vc2均来自所述公共电压产生电路22。所述触摸驱动电路23例如可进一步输出第二公共电压Vc2给数据选择电路24，但数据选择电路24选择输出来自所述公共电压产生电路22的第二公共电压Vc2给公共电极101，从而，使得所述触摸显示装置1在第二时段W2执行图像显示而非执行触摸感测。
通过所述第一时段W1与所述第二时段W2交替进行，所述触摸显示装置1实现图像显示与触摸感测。
在显示一帧图像的过程中，所述触摸显示装置1可包括一个第一时段W1、多个第一时段W1、一个第一时段W1的一部分、一个第一时段W1和第一时段W1的部分、或多个第一时段W1与第一时段W1的部分。
所述触摸驱动电路23与所述公共电压产生电路22的电路结构不同，从而，即使所述触摸驱动电路23与所述公共电压产生电路22提供给公共电极101的信号相同，但，与所述触摸驱动电路23相连接的公共电极101可进一步用作触摸感测电极。
所述触摸驱动电路23进一步接收来自公共电极101输出的触摸感测信号，并根据触摸感测信号获取触摸信息。
具体地，与所述触摸驱动电路23电连接的公共电极101可响应于目标物体(例如，手指等合适物体)的触摸或接近与否，对应输出不同的触摸感测信号给所述触摸感测驱动电路23，相应地，所述触摸驱动电路23可根据触摸感测信号获得触摸信息。
相对地，所述公共电压产生电路22并不接收来自公共电极101的信号，或者，即使接收来自公共电极101的信号，但基于公共电压产生电路22本身的电路结构，不管公共电极101上方是否有目标物体触摸或接近，与公共电压产生电路22电连接的公共电极101输出的信号 是基本不变的，从而并不能获取触摸信息。
较佳地，所述公共电压产生电路22与所述触摸驱动电路23共享同一信号源221，所述信号源221受所述调制信号MGND的调制，对应产生一第一参考电压信号。所述公共电压产生电路22与所述触摸驱动电路23根据所述第一参考电压信号对应输出相同的第一公共电压Vc1给所述多个公共电极101，其中，与公共电压产生电路22相电连接的公共电极101执行图像显示而非同时执行触摸感测，与触摸驱动电路23相电连接的公共电极101同时执行图像显示与自电容触摸感测。
由于所述触摸驱动电路23提供与所述公共电压产生电路22相同的信号给公共电极101，因此，所述触摸驱动电路23在驱动公共电极101执行自电容触摸感测的同时，并不影响执行自电容触摸感测的公共电极101执行正常的图像显示。另外，由于所述公共电压产生电路22与所述触摸驱动电路23共享同一信号源221，因此，所述公共电压产生电路22与所述触摸驱动电路23输出给所述多个公共电极101的信号可达到相同或基本相同，从而确保触摸感测与图像显示的质量。
在一些具体的实施方式中，所述公共电压产生电路22例如包括信号源221、跟随器222、和稳压电路223。所述信号源221与所述跟随器222连接，所述跟随器222进一步与所述数据选择电路24连接。所述稳压电路223的一端连接于所述跟随器222与所述数据选择电路24之间，另一端与所述调制地连接。
所述信号源221包括接地端a和输出端b。所述接地端a与所述调制地连接。所述输出端b与所述跟随器222连接。所述信号源221例如为直流源，然，本发明对此并不做限制，所述信号源221也可为其它合适的电路结构。
所述跟随器222传输所述信号源221输出的信号给所述数据选择电路24，并通过所述数据选择电路24提供给相应的公共电极101执行图像显示。所述跟随器222例如为第一放大器，然，本发明并不局限于此，所述跟随器222也可为其它合适的电路结构，并不局限于所述第一放大器。在所述具体实施方式中，以跟随器222为第一放大器为例进行说明。所述第一放大器222包括第三电源端c1、第三接地端d1、第一同相端e1、第一反相端f1、和第一输出端g1。其中，所述第三电源端c1用于加载电源电压VDD1。所述第三接地端d1用于连接调制地。所述第一同相端e1用于与所述信号源221的输出端b连接。所述第一反相端f1与所述第一输出端g1短接。所述第一输出端g1与所述数据选择电路24连接。
所述稳压电路223连接在所述第一输出端g1与调制地之间，用于对所述跟随器222与所述数据选择电路24之间的电压进行稳压。在本实施方式中，所述稳压电路223例如包括稳压电容Cw。所述稳压电容Cw连接在所述第一输出端g1与所述调制地之间。
工作时，在第一时段W1，所述接地端a和第三接地端d1均接收所述调制信号MGND，所述信号源221对应通过所述输出端b输出所述第一参考电压信号给所述第一放大器222， 所述第一放大器222处于虚短状态，则对应输出与所述第一参考电压信号相同的第一公共电压Vc1给所述数据选择电路24，通过所述数据选择电路24提供给相应的公共电极101执行图像显示。
在第二时段W2，所述接地端a和第三接地端d1均接收接地信号GND，所述信号源221对应通过所述输出端b输出第二参考电压信号给第一放大器222，所述第一放大器222处于虚短状态，则对应传输与所述第二参考电压信号相同的第二公共电压Vc2给所述数据选择电路24，并通过所述数据选择电路24提供给所述多个公共电极101执行图像显示。
所述触摸驱动电路23例如包括所述信号源221和多个运算放大器231。每一运算放大器231包括第二放大器232和反馈支路233。所述第二放大器232包括第四电源端c2、第四接地端d2、第二同相端e2、第二反相端f2、和第二输出端g2。其中，所述第四电源端c2用于加载电源电压VDD2。所述第四接地端d2用于连接调制地。所述第二同相端e2用于与所述信号源221的输出端b连接。所述第二反相端f2与所述数据选择电路24连接，并进一步通过所述反馈支路233与所述第二输出端g2连接。所述第二输出端g2进一步与所述信号处理电路26连接。
所述反馈支路233例如包括反馈电容233a和重置开关233b。较佳地，所述反馈电容233a和所述重置开关233b并联连接至所述第二反相端f2与所述第二输出端g2之间。
工作时，在第一时段W1，所述第四接地端d2接收调制信号MGND。所述第二放大器232处于虚短状态，接收来自所述信号源221的第一参考电压信号，并对应输出第一公共电压Vc1给所述数据选择电路24，通过所述数据选择电路24提供给相应的公共电极101。所述反馈支路233用于传输公共电极101感测到的触摸感测信号给所述信号处理电路26。
由于所述触摸感测信号同样会被所述调制信号MGND所调制，当所述信号处理电路26对触摸感测信号进行分析计算时，可根据需要对所述触摸感测信号进行反向调制，以获取触摸坐标信息。
所述多个运算放大器231的个数例如与所述多个公共电极101的列数相同。每一运算放大器231通过数据选择电路24对应可选择连接一列公共电极101。然，所述多个运算放大器231的个数也可与所述多个公共电极101的行数相同。另外，本发明并不以此为限，例如，每一列的公共电极101也可对应选择连接二运算放大器231等实施方式也是可以的。
本发明的触摸驱动电路23提供与公共电压产生电路22产生的第一公共电压Vc1相同的触摸驱动信号给公共电极101，从而，所述触摸驱动信号可以驱动公共电极101既执行图像显示又执行自电容触摸感测，因此，所述触摸显示装置1的所述多个公共电极101在执行图像显示的同时，可进一步执行触摸感测。
进一步地，相较于所述触摸驱动电路23与所述公共电压产生电路22分别各用一信号源，由于本申请的所述触摸驱动电路23与所述公共电压产生电路22共用同一信号源221，因此， 所述触摸驱动电路23与所述公共电压产生电路22通过所述数据选择电路24输出给所述多个公共电极101的第一公共电压Vc1可更趋向相同或能达到相同，从而确保所述触摸显示装置1的图像显示与触摸感测的品质。
然，在一些变更实施方式中，也可选择所述触摸驱动电路23与所述公共电压产生电路22分别各用一信号源等电路结构。
在第二时段W2，调制地变为设备地，所述信号源221输出第二参考电压信号给跟随器222和所述多个运算放大器231，所述控制电路25控制所述数据选择电路24选择输出来自所述公共电压产电路22的第二公共电压Vc2给所述多个公共电极101执行图像显示。
进一步地，在一些变更实施方式中，也可在信号源221与跟随器222之间设置第一开关(图未示)、在信号源221与运算放大器231之间设置第二开关(图未示)，对应地，在第一时段W1，第一开关与第二开关均处于闭合状态，第二时段W2，所述第一开关处于闭合，所述第二开关处于开启状态也可是可以的。
所述数据选择电路24例如包括一第一数据选择器241和多个第二数据选择器242。所述跟随器222与所述第一数据选择器241连接，所述第一数据选择器241与所述多个公共电极101分别连接。每一运算放大器231分别连接一第二数据选择器242，每一第二数据选择器242分别连接一列公共电极101。所述第一数据选择器241和所述多个第二数据选择器242分别连接至所述控制电路25。所述控制电路25控制所述第一数据选择器241和所述多个第二数据选择器242的信号输出时序。
举例，所述多个公共电极101为呈26行40列的矩阵式排布，对应地，所述多个运算放大器231的数量为40个，所述第二数据选择器242的数量为40个。第一数据选择器241包括第一输出端口O1，用于输出来自所述公共电压产生电路22的信号给相应的公共电极101。所述第一输出端口O1的数量与所述多个公共电极101的行数相同，即为26个。每一第二数据选择器242包括第二输出端口O2，用于输出来自所述触摸驱动电路23的信号给相应的公共电极101。所述第二输出端口O2的数量与所述多个公共电极101的行数相同，即为26个。需要说明的是，在图2中，限于图示的大小，实际上只示出部分电路结构，例如，只示出2个运算放大器231，2个第二数据选择器242，以及部分公共电极101。
在本实施方式中，每一第二数据选择器242的第二输出端口O2分别连接一公共电极101。每一第一输出端口O1分别连接至各第二数据选择器242的一第二输出端口O2与公共电极101之间，从而节省连接线L的数量，不同的第一输出端口O1彼此之间连接不同的第二输出端口O2。
然，可变更地，在其它实施方式中，所述第一数据选择器241的数量也可为多个，并不局限为一个，相应地，所述多个第一数据选择器241的第一输出端口O1与所述多个第二数据选择器242的第二输出端口O2之间的连接关系可对应调整，比如，每一第一数据选择器 241与部分第二数据选择器242相连接，然，也可为，每一第一数据选择器241的第一输出端口O1与所述多个第二数据选择器242的部分第二输出端口O2连接，等等。
在第一时段W1，所述多个第二数据选择器242在控制电路25的控制下为26选1的数据选择器，相应地，每一第二数据选择器242每次输出来自触摸驱动电路23的所述第一公共电压Vc1给一公共电极101，通过26次，所述多个第二数据选择器242驱动所有的公共电极101执行完一次触摸感测。所述第一数据选择器241在控制电路25的控制下为26选25的数据选择器，当所述多个第二数据选择器242输出第一公共电压Vc1给同一行的公共电极101时，所述第一数据选择器241输出来自公共电压产生电路22的第一公共电压Vc1给其余各行的各公共电极101。需要说明的是，26次的触摸驱动可为在一个或多个第一时段W1完成。
在第二时段W2，所述第一数据选择器241在控制电路25的控制下变为26选26的数据选择器，输出来自所述公共电压产生电路22的第二公共电压Vc2给全部公共电极101。所述第二数据选择器242例如在控制电路25的控制下停止输出信号给公共电极101。
所述触摸显示装置1的触摸驱动电路23和公共电压产生电路22并不局限为上述的电路结构，也可为其它合适的电路结构。例如，所述数据选择电路24并不局限为第一数据选择器241和第二数据选择器242，也可为其它合适的开关电路结构。
通过所述数据选择电路24，一方面可减少驱动电路20与所述多个公共电极101之间的连接线L的数量，一方面也可达到在驱动所述多个公共电极101执行图像显示的同时，分时驱动公共电极101执行触摸感测。
如前所述，所述触摸显示装置1也可为图像显示与触摸感测均在持续进行的，例如，在时间上，所述公共电压产生电路22与触摸驱动电路23均持续提供所述第一公共电压Vc1给公共电极101，在空间上，所述公共电压产生电路22与所述触摸驱动电路23相配合驱动所述多个公共电极101。换句话说，无第二时段W2，所述控制电路25对应控制所述第一数据选择器241始终保持26选25，控制所述多个第二数据选择器242始终保持26选1。
又例如，也可只选择触摸驱动电路23持续驱动所述多个公共电极101同时执行图像显示与触摸感测，省略公共电压产生电路22。
进一步地，当所述多个公共电极101呈其它规则或非规则方式排布时，所述数据选择电路24、所述公共电压产生电路22、所述触摸驱动电路23与所述多个公共电极101之间的关系可做相应的调整，对于本领域的一般技术人员而言，根据上述揭示的技术内容，是可以合理推测出相应的电路信息，故，此处不再赘述。
另外，在一些实施方式中，所述驱动电路20例如可进一步包括指纹驱动电路，所述指纹驱动电路可选择性连接所述多个公共电极101，当所述驱动电路20在驱动部分公共电极101同时执行触摸感测与图像显示时，所述指纹驱动电路也可驱动部分公共电极101同时执行指纹感测与图像显示，公共电压产生电路22驱动部分公共电极执行图像显示。因此，本申请中， 驱动公共电极101工作的不局限于公共电压产生电路22和触摸驱动电路23，还可以包括其它合适类型或合适功能的电路，对应驱动公共电极101执行相应的功能。
请一并参阅图3与图4，图4为所述调制电路21的一实施方式的电路结构示意图。所述调制电路21包括第一有源开关211、第二有源开关213、和控制单元215。其中，第一有源开关211包括控制端K1、第一传输端T1、和第二传输端T2，第二有源开关213包括控制端K2、第一传输端T3、和第二传输端T4。所述控制端K1、K2均与控制单元215连接。第一有源开关211的第二传输端T2与第二有源开关213的第一传输端T3连接、并于连接线上定义一输出节点N，第一有源开关211的第一传输端T1接收第一参考信号，第二有源开关213的第二传输端T4接收第二参考信号，所述控制单元215通过控制所述第一、第二有源开关211、213来对应控制所述输出节点N交替输出所述第一参考信号与所述第二参考信号，以形成调制信号MGND。
在本实施方式中，所述第一参考信号为接地信号GND，所述第二参考信号为驱动信号。相应地，所述第二传输端T4与所述电压产生电路27连接，所述第一传输端T1与设备地连接，用于接收接地信号GND，所述节点N用于输出所述调制信号MGND给调制地。
所述第一有源开关211和第二有源开关213如为薄膜晶体管、三极管、金属氧化物半导体场效应管等合适类型的开关。
所述调制电路21的工作原理为：在第一时段W1，所述控制单元215用于控制所述调制电路21输出调制信号MGND给域90中的地，此时域90中的地为调制地；在第二时段W2，所述控制单元215用于控制所述调制电路21输出接地信号GND给调制地，此时调制地变为与设备地相同。
需要进一步说明的是，在第一时段W1，所述电子设备100有一个以接地信号GND为基准的参考域80和一个以调制信号MGND为基准的参考域90，对于触摸显示装置1，由于所述触摸驱动电路23提供激励信号给公共电极101的同时，进一步接收来自所述公共电极101本身输出的触摸感测信号，以获取触摸信息，因此，所述触摸驱动电路23在驱动所述触摸显示面板10执行触摸感测时的原理为自电容触摸感测原理。
当电子设备100采用以GND与MGND为基准的两个域80、90时，不仅触摸显示面板10的信号被整体同步调制而使得信噪比得到提高，而且所述触摸驱动电路23处于域90中的某些电路结构相应地也会得到简化，进而也可以简化电路结构，节省产品成本。例如，以触摸驱动电路23的信号源221以及现有的触摸驱动电路的信号源221a(见下面图5)为例进行说明。
请一并参阅图5与图6，图5为现有的触摸驱动电路的信号源221a的电路结构示意图。图6为触摸驱动电路23的信号源221的电路结构示意图。需要提前说明的是，现有的触摸驱动电路在工作时，信号源221a是以接地信号GND为电压参考基准。本申请的触摸驱动电路 23工作时，信号源221是以调制信号MGND为电压参考基准。信号源221a包括电流源Ia、电阻Ra、第一开关K1a、第二开关K2a。其中，电流源Ia与电阻Ra串联连接于电源端P1与设备地GND之间。第一开关K1a的一端连接于电流源Ia与电阻Ra之间，另一端连接至触摸驱动电路的同相端h。第二开关K2a的一端连接于第一开关K1a与同相端h之间，另一端连接至用于加载接地信号GND的设备地。通过控制第一开关K1a与第二开关K2a的交替导通，对应产生触摸感测驱动信号给同相端h。其中，所述电源端P1相对于所述设备地GND保持恒定。
相对地，所述信号源221包括电流源Ib和电阻Rb，所述电流源Ib与电阻Rb串联连接于电源端P2与用于加载调制信号MGND的地之间。触摸驱动电路23的接收端，即第二同相端g2，连接至所述电流源Ib与电阻Rb之间。由于所述调制信号MGND是变化的，因此，电源端P2、所述电流源Ib与电阻Rb之间的输出电压均随调制地上的调制信号MGND的变化而变化，从而，对应产生触摸感测驱动信号给第二同相端g2。另外，也可在诸如调制地与电源端P2之间增加电容，来保持信号的稳定性。
相较于信号源221a，信号源221的电路结构变得简单，而且信号源221所产生的触摸感测驱动信号相较于信号源221a所产生的触摸感测驱动信号要稳定。
请一并参阅图2、图3、与图7，图7为所述电子设备100的一具体实施方式的电路结构示意图。如前所述，在此实施方式中，所述触摸显示装置1是以液晶显示装置为例进行说明。然，可变更地，当所述触摸显示装置1为其它类型的显示装置时，所述触摸显示装置1的电路结构可对应所有不同，另外，不同的液晶显示装置的电路结构也可不尽相同，但对于本领域的一般技术人员可对应轻易推导得知的结构均应落入本申请的保护范围。在本实施方式中，所述触摸显示装置1的触摸显示面板10包括多个像素点11。每一像素点11在所述驱动电路20的驱动下用于执行图像显示与触摸感测。每一像素点11包括所述公共电极101、像素电极103、和开关单元104。在本实施方式中，所述开关单元104包括控制开关105。所述控制开关105包括控制电极G、第一传输电极S、和第二传输电极D。所述控制电极G和所述第一传输电极S与所述驱动电路20连接。所述第二传输电极D与所述像素电极103连接。所述驱动电路20用于驱动所述控制开关105导通与截止。在本实施方式中，所述开关单元104包括一控制开关105，然，在其它实施方式中，所述开关单元104也可包括二控制开关105或更多个控制开关，然，也可进一步包括其它电路元件，例如存储电路等。所述二控制开关105例如为串联连接。
所述控制开关105例如为薄膜晶体管开关。所述薄膜晶体管开关例如为低温多晶硅薄膜晶体管开关、非晶硅薄膜晶体管开关、氧化铟镓锌(IGZO)薄膜晶体管开关、高温多晶硅薄膜晶体管开关等等。然，本发明并不以此为限，所述控制开关105也可为其它合适类型的开关。当控制开关105为薄膜晶体管开关时，控制电极G为薄膜晶体管开关的栅极，第一传输电极 S为薄膜晶体管开关的源极，第二传输电极D为薄膜晶体管开关的漏极。
在本实施方式中，每一像素点11分别包括一像素电极103和一控制开关105。由于公共电极101的尺寸一般较大于像素电极103的尺寸，相应地，多个像素点11共用同一公共电极101。然，在其它变更实施方式中，也可为每一像素点11分别包括一公共电极101。
在第一时段W1，所述驱动电路20通过提供第一扫描开启信号Vg1给控制开关105，驱动所述控制开关105导通，并通过导通的控制开关105提供第一灰阶电压Vd1给像素电极103，提供第一公共电压Vc1给公共电极101，以驱动所述像素点11执行图像显示刷新。其中，所述第一扫描开启信号Vg1、所述第一灰阶电压Vd1、与所述第一公共电压Vc1均为经所述调制信号MGND同步调制后的信号。
通常，所述驱动电路20按行驱动所述多个像素点11执行图像显示刷新。在第一时段W1，当所述驱动电路20驱动某一行的像素点11执行图像显示刷新时，所述驱动电路20通过提供第一扫描截止信号Vg2给其余行的像素点11的控制开关105，使得所述其余行的像素点11的控制开关105截止，从而，使得所述其余行的像素点11处于图像显示保持状态。其中，所述第一扫描截止信号Vg2为经所述调制信号MGND调制后的信号。
一般地，所述多个像素点11呈多行多列的方式排布。然，所述多个像素点11也可呈其它规则或非规则方式排布。
为避免触摸感测对图像显示刷新的干扰，较佳地，所述驱动电路20同时驱动执行触摸感测的像素点11与执行图像显示刷新的像素点11之间不相重叠，例如，执行图像显示刷新的像素点11与执行触摸感测的公共电极101之间间隔预定行在执行图像显示保持的像素点11。通过软件或硬件或软硬件控制，来实现执行触摸感测的像素点11与执行图像显示刷新的像素点11之间可以保持预定距离而不相重叠。
然，可变更地，在其它实施方式中，执行图像显示刷新的像素点11在驱动电路20的驱动下也可选择同时执行触摸感测，或者，同时执行图像显示刷新的像素点11与执行触摸感测的像素点11之间也可选择部分重叠，部分重叠的情况例如为像素点11之间完全或部分共用一公共电极101。
相对地，在第二时段W2，所述驱动电路20例如提供第二扫描开启信号Vg3给控制开关105，激活控制开关105，并通过激活的控制开关105提供第二灰阶电压Vd2给像素电极103，提供第二公共电压Vc2给公共电极101执行图像显示刷新。当所述驱动电路20驱动某一行的像素点11执行图像显示刷新时，提供第二扫描截止信号Vg4给其余行的像素点11的控制开关105截止，从而，使得所述其余行的像素点11处于图像显示保持状态。
所述第一扫描开启信号Vg1例如为所述第二扫描开启信号Vg3经所述调制信号MGND调制后的信号。所述第一扫描截止信号Vg2例如为所述第二扫描截止信号Vg4经所述调制信号MGND调制后的信号。
所述第一灰阶电压Vd1为相应的第二灰阶电压Vd2经所述调制信号MGND调制后的信号。例如，当一第一灰阶电压Vd1为第二灰阶电压Vd2经所述调制信号MGND调制后的信号，则，第二灰阶电压Vd2与第二公共电压Vc2之间的压差等于第一灰阶电压Vd1与第一公共电压Vc1之间的压差。
对于各像素点11：所述第一像素电极103与所述公共电极101之间的压差决定各像素点11的显示灰度级别。对于液晶显示装置而言，为了使得液晶分子不被极化，对于同一显示灰度级别，灰阶电压可分为正极性灰阶电压和负极性灰阶电压。
所述触摸显示面板10可进一步包括多条扫描线281和多条数据线291。所述多条扫描线281和所述多条数据线291例如为绝缘交叉排布。所述多条扫描线281例如沿X方向延伸，沿Y方向排布。所述多条数据线291例如沿Y方向延伸，沿X方向排布。每一扫描线281分别连接一行像素点11的控制开关105的控制电极G。每一数据线291分别连接一列像素点11的控制开关的第一传输电极S。
所述多条扫描线281用于传输来自所述驱动电路20的第一扫描开启信号Vg1、第二扫描开启信号Vg3、第一扫描截止信号Vg2、或第二扫描截止信号Vg4给控制开关105的控制电极G。所述多条数据线291用于传输来自所述驱动电路20的第一灰阶电压Vd1、或第二灰阶电压Vd2给控制开关105的第一传输电极S。
所述驱动电路20进一步包括显示驱动电路20a，用于驱动所述触摸显示面板10执行图像显示。所述显示驱动电路20a包括扫描驱动电路28、扫描信号产生电路28a、数据驱动电路29、和所述公共电压产生电路22。所述扫描驱动电路28连接所述多条扫描线281。所述数据驱动电路29连接所述多条数据线291。所述扫描驱动电路28和所述数据驱动电路29均与所述控制电路25连接。所述控制电路25进一步用于控制所述扫描驱动电路28的扫描时序，以及提供相应的显示数据给所述数据驱动电路29。所述扫描信号产生电路28a与所述扫描驱动电路28连接。所述扫描信号产生电路28a用于产生所述第一扫描开启信号Vg1、第二扫描开启信号Vg3、第一扫描截止信号Vg2、或第二扫描截止信号Vg4，并提供所述第一扫描开启信号Vg1、第二扫描开启信号Vg3、第一扫描截止信号Vg2、或第二扫描截止信号Vg4给所述扫描驱动电路28。所述扫描驱动电路28例如包括移位寄存器的电路结构，接收来自扫描信号产生电路28a的扫描开启信号和扫描截止信号，并在控制电路25的控制下对应提供扫描开启信号和扫描截止信号给相应的扫描线281。
在本实施方式中，工作时，在第一时段W1，所述扫描信号产生电路28a、所述扫描驱动电路28和数据驱动电路29也位于域90中。所述扫描信号产生电路28a受所述调制电路21的调制信号MGND的调制输出所述第一扫描开启信号Vg1、所述第一扫描截止信号Vg2给所述扫描驱动电路28，所述扫描驱动电路28在控制电路25的时序控制下对应输出所述第一扫描开启信号Vg1、所述第一扫描截止信号Vg2分别给相应的扫描线281，所述数据驱动电 路29受所述调制电路21的调制信号MGND的调制，输出所述第一灰阶电压Vd1给所述多条数据线291，以通过激活的控制开关105提供给相应的像素电极103执行图像显示刷新。所述公共电压产生电路22和所述触摸驱动电路23通过所述数据选择电路24提供第一公共电压Vc1给所述多个公共电极101。
另外，处于图像显示保持的像素点11的像素电极103上的信号通过电容耦合作用变为经所述调制信号MGND调制的信号。因此，所述触摸显示面板10的各像素点11的像素电极103与公共电极101上的信号均变为经所述调制信号MGND同步调制后的信号。从而，所述驱动电路20在驱动所述触摸显示面板10执行正常图像显示的任意过程中，均可同时驱动公共电极101执行触摸感测。
例如，当扫描驱动电路28提供第一扫描开启信号Vg1给一扫描线281时，公共电压产生电路22提供第一公共电压Vc1给部分公共电极101执行图像显示，触摸驱动电路23提供第一公共电压Vc1给其余公共电极101执行图像显示与自电容触摸感测。
相较于现有的复用公共电极执行触摸感测的Incell类型的触摸显示装置，本申请的触摸显示装置1通过利用所述调制信号MGND同步调制触摸显示面板10的所有信号，从而使得用于驱动公共电极101执行图像显示的信号可进一步用作触摸驱动信号，因此，所述驱动电路20在提供第一扫描开启信号Vg1给扫描线281时，也同样可以对公共电极101执行自电容触摸感测，相应地，触摸显示装置1不必受限于在行间隙I、帧间隙来驱动公共电极101执行触摸感测，从而，对于显示分辨率提高的显示装置并不会存在执行触摸感测的时间不够的技术问题。另外，所述触摸显示装置1在显示图像的任意过程中执行触摸感测，对图像的正常显示无影响或影响较小。
需要说明的是，所述驱动电路20输出至所述多个公共电极101的第一公共电压Vc1均相同，且，所述第一公共电压Vc1相较于接地信号GND为变化的信号，从而，可采用所述第一公共电压Vc1进一步用作触摸驱动信号，相应地，所述驱动电路20在驱动公共电极101执行正常图像显示的同时，可进一步驱动公共电极101执行自电容触摸感测。
另外，在第二时段W2，所述扫描信号产生电路28a输出所述第二扫描开启信号Vg3、所述第二扫描截止信号Vg4给所述扫描驱动电路28，所述扫描驱动电路28在控制电路25的控制下对应输出第二扫描开启信号Vg3、所述第二扫描截止信号Vg4分别给相应的扫描线281，所述数据驱动电路29输出第二灰阶电压Vd2给所述多条数据线291，以通过激活的控制开关105提供给相应的像素电极103。所述公共电压产生电路22提供第二公共电压Vc2给所述多个公共电极101。从而，驱动所述触摸显示面板10执行图像显示。
对于液晶显示装置而言，所述第二公共电压Vc2一般选择相对所述接地信号GND为不变的恒定电压信号，例如为(-1)V。在第一时段W1，所述调制信号MGND例如为周期性变化的信号，频率例如为200KHZ，幅度为1.8V，即调制信号MGND的第一参考信号为0V，第 二参考信号为1.8V。相应地，所述第一公共电压Vc1为(-1)V的电压信号和0.8V的电压信号交替输出的信号。
需要说明的是，在图7中，仅示出调制电路21输出调制信号MGND给触摸驱动电路23，省略了调制电路21输出调制信号MGND给域90中其它具有接地端的电路，例如公共电压产生电路22、扫描信号产生电路28a等，然，本领域技术人员根据上述说明可以明确得知所述调制电路21是有输出调制信号MGND给域90中其它具有接地端的电路。
在某些实施方式中，所述驱动电路20也可并不驱动所有的公共电极101均执行自电容触摸感测。
请一并参阅图8与图9，图8为图7所示触摸显示面板10的一实施方式的分解结构示意图。图9为图8所示触摸显示面板10的剖面结构示意图。所述触摸显示面板10包括第一基板106、第二基板107、显示媒质层108。所述显示媒质层108在此实施方式中为液晶层，然，可变更地，在其它实施方式中，可对应为其它显示媒质。所述多个像素点11的像素电极103和控制开关105、所述多条扫描线281、和所述多条数据线291均设置在所述第二基板107上。所述显示媒质层108和所述多个公共电极101设置在所述第一基板106和所述第二基板107之间。
所述第一基板106与所述第二基板107例如为透明绝缘基板。所述透明绝缘基板例如为玻璃基板、薄膜基板等。
所述第二基板107、以及设置在所述第二基板107上的像素电极103、控制开关105、所述多条扫描线281和所述多条数据线291通常被统称为阵列(Array)基板。相对地，所述第一基板106上设置有彩色滤光片(图未示)，以实现彩色图像显示。所述第一基板106以及彩色滤光片通常被统称为彩色滤光片(Color Filter,CF)基板。所述第一基板106背对所述第二基板107的一侧用于图像显示以及接收触摸感测。然，可变更地，所述彩色滤光片也可放置在所述第二基板107上。在一些类型的显示装置中，所述彩色滤光片也可被省略，可替代地，采用红、绿、蓝三颜色的光源进行发光。另外，对于类型不同的显示装置，所述第二基板107背对所述第一基板106的一侧也可用于图像显示以及接收触摸感测。所述触摸显示面板10又或者为双面触摸显示面板。本发明对触摸显示面板10是单面触摸显示面板还是双面触摸显示面板并不做具体限制。
较佳地，所述多个公共电极101设置在所述显示媒质层108与所述第二基板107之间。在本实施方式中，所述多个公共电极101位于所述显示媒质层108与所述多个像素电极103之间。例如，所述多个公共电极101位于同一层，所述多个像素电极103位于同一层，二者层叠设置。另外，由于所述触摸显示装置1是以液晶显示装置为例，相应地，所述液晶显示装置为边缘场转换型(Fringe Field Switching,FFS)的液晶显示装置。所述多个公共电极101上分别设置有狭缝101a。从而以与像素电极103之间形成边缘电场。在此实施方式中，所述多 个像素电极103上可不设置狭缝，各为一整片电极，然，可变更地，所述多个像素电极103上也可设置有狭缝，从而提高边缘电场强度。
请一并参阅图10与图11，图10为图7所示触摸显示面板10的另一实施方式的剖面结构示意图。图11为图10所示触摸显示面板10的俯视示意图。所述多个公共电极101也可设置在像素电极103与第二基板107之间。所述多个公共电极101与所述多个像素电极103之间层叠设置。所述多个像素电极103上分别设置狭缝103a，以与公共电极101之间形成边缘电场。在此实施方式中，所述多个公共电极101上可不设置狭缝，各为一整片电极，然，可变更地，所述多个公共电极101上也可设置有狭缝，从而提高边缘电场强度。
另外，可变更地，所述触摸显示面板10也可为平面转换型(In-Plane Switching,IPS)的液晶显示面板，或，所述触摸显示面板10也可为扭曲向列型(Twisted Nematic,TN)的液晶显示面板，或，所述触摸显示面板10为其它任何合适类型的显示面板。
请再参阅图1和图3，所述电子设备100进一步包括主控芯片3。所述主控芯片3与所述触摸显示装置1连接。所述主控芯片3用于与所述触摸显示装置1进行数据通信。所述主控芯片3还进一步用于提供电源电压给所述触摸显示装置1。所述主控芯片3可以是单一芯片，也可以是一芯片组。当主控芯片3为芯片组时，所述芯片组包括应用处理器(Application Processor,AP)和电源芯片。另外，所述芯片组可进一步包括存储芯片。进一步地，所述应用处理器也可为中央处理器(Central Processing Unit,CPU)。
所述主控芯片3包括供电电源端31和接地端33。所述供电电源端31连接驱动电路20，用于为驱动电路20供电。所述接地端33连接设备地，接收设备地的接地信号GND。在第一时段W1和第二时段W2，所述主控芯片3均是以接地信号GND为电压参考基准。
所述主控芯片3例如提供显示数据以及相关控制信号给所述显示驱动电路20a。所述显示驱动电路20a根据所述主控芯片3所提供的信号对应驱动所述触摸显示面板10执行相应的图像显示。所述主控芯片3例如进一步提供电源电压信号(VDD1、VDD2)给触摸驱动电路23和公共电压产生电路22等电路。所述触摸驱动电路23提供触摸驱动信号给公共电极101执行触摸感测，所述主控芯片3接收来自信号处理电路26输出的信号，对应控制电子设备100是否执行相应的功能。另外，所述主控芯片3例如通过提供控制信号给控制电路25，通过控制电路25控制所述数据选择电路24，来对应控制所述驱动电路20驱动公共电极101执行触摸感测的时序。
需要说明的是，在第一时段W1，由于所述主控芯片3位于域80中，所述显示驱动电路20a、触摸驱动电路23等电路位于域90中，因此，位于域80中的主控芯片3与位于域90中的显示驱动电路20a、触摸驱动电路23等电路之间的信号传输例如需经由电平转换处理，以满足电子元件的耐压需求。相对地，在第二时段W2，主控芯片3与显示驱动电路20a、触摸驱动电路23等电路之间的信号传输若需经由电平转换处理，则进行电平转换处理，若无需经 由电平转换处理，则不进行电平转换处理。
请一并参阅图3、图12与图13，图12为图3所示信号处理电路26的一实施方式的结构框图。所述图13为图12所示信号处理电路26的一信号处理单元261的一实施方式的结构示意图。所述信号处理电路26包括多个信号处理单元261。每一信号处理单元261对应连接一运算放大器231，用于对从所述运算放大器231输出的感测信号进行处理与计算，获得触摸信息。
所述信号处理单元261包括模拟-数字信号转换单元263和计算单元265。所述模拟-数字信号转换单元263对来自运算放大器231的第二输出端g2所输出的信号进行模数转换，并输出转换后的数字信号给所述计算单元265。所述计算单元265根据所述数字信号计算获得触摸坐标。所述计算单元265与所述主控芯片3连接，用于输出表示触摸坐标的信号给主控芯片3。所述主控芯片3根据所述表示触摸坐标的信号对应控制电子设备100执行相应的功能。
需要说明的是，所述信号处理电路26的结构也并非限于图12所示的结构，例如，也可为多个运算放大器231共用一信号处理单元261，而并非为每一运算放大器231对应分别连接一信号处理单元261。
另外，在运算放大器231与信号处理单元261中增加相应的电路模块或省略部分电路模块也是可以的，又或者，采用其它电路模块或电路单元来也实现相同功能同样是可以的。具体地，如，在模拟-数字信号转换单元263与第二输出端g2之间进一步包括滤波单元，所述滤波单元对第二输出端g2输出的信号进行滤波处理之后再输出滤波后的信号给模拟-数字信号转换单元263。
再例如，在所述计算单元265与所述模拟-数字信号转换单元263之间可进一步设置电平转换单元264，所述电平转换单元264用于对所述模拟-数字信号转换单元263输出的数字信号进行电平转换，并输出电平转换后的数字信号给计算单元265。所述计算单元265根据电平转换后的数字信号计算获得触摸坐标。又例如，所述计算单元265与所述电平转换单元264互换位置，相应地，所述模拟-数字信号转换单元263将转换后的数字信号输出给所述计算单元265。所述计算单元265根据所述数字信号计算获得触摸坐标，并将表示触摸坐标的信号输出给电平转换单元264，所述电平转换单元264对接收到表示触摸坐标的信号进行电平转换后，再输出给所述主控芯片3，如此也是可能的，需要根据计算单元265与模拟-数字信号转换单元263的耐压情况确定。
请参阅图14，图14为电子设备100的又一实施方式的结构示意图。所述触摸显示面板10可进一步包括接地元件，所述接地元件例如为接地线L1。所述接地线L1例如设置在所述多个像素点11的周围。然，所述接地元件并不限于所述接地线L1。另外，所述扫描驱动电路28例如可集成在所述触摸显示面板10上(Gate In Panel,GIP)，相应地，所述接地元件也可为扫描驱动电路28中的接地元件。所述接地线L1在其它实施方式中也可被省略。
所述驱动电路20可进一步包括第一接地端201和第二接地端203。所述调制电路21连接于所述第一接地端201与所述第二接地端203之间。其中，所述第一接地端201连接所述触摸显示面板10上的接地元件，在本实施方式中，所述第一接地端201连接所述接地线L1。所述第二接地端203连接设备地，接收接地信号GND。在第一时段W1，所述调制电路21通过所述第一接地端201输出所述调制信号MGND给所述触摸显示面板10；在第二时段W2，所述调制电路21通过所述第一接地端201输出所述接地信号GND给所述触摸显示面板10。
所述驱动电路20例如可进一步包括斜率控制器204，所述斜率控制器204与所述调制电路21连接，用于控制所述调制电路21输出的调制信号的斜率，以减少电磁干扰(EMI)。另，所述斜率控制器204例如设置在以GND为基准的域80中。然，在其它实施方式中，所述斜率控制器204也可被省略。
所述驱动电路204可进一步包括显示处理电路205。所述显示处理电路205连接于所述主控芯片3与所述电平转换单元264之间。所述电平转换单元264进一步与控制电路25连接。所述显示处理电路205用于对来自主控芯片3的显示数据进行相应处理(如，存储、解压缩、色彩调整等)。所述电平转换单元264设置在所述显示处理电路205与控制电路25之间，用于对所述显示处理电路205处理后的显示数据进行电平转换，并输出电平转换后的显示数据给所述控制电路25。所述控制电路25输出相应的显示数据以及时序信号给所述显示驱动电路20a。所述显示驱动电路20a转换接收到的显示数据为灰阶电压，并根据所述时序信号在第一时段W1输出第一灰阶电压Vd1给相应的像素电极103执行图像显示刷新，在第二时段W2输出第二灰阶电压Vd2给相应的像素电极103执行图像显示刷新。所述显示数据优选为数字信号。
需要说明的是，在第二时段W2，当不采用调制地的方案时，若显示处理电路205与所述控制电路25之间的信号不需电平转换时，则对显示处理电路205与控制电路25之间的信号可不进行电平转换，但是，在第一时段W1，在调制地技术方案中，由于域80与域90的电压参考基准不同，所以需做电平转换。
类似地，在第二时段W2，若计算单元265与模拟-数字信号转换单元263之间的信号不需电平转换时，则对计算单元265与模拟-数字信号转换单元263之间的信号可不进行电平转换，但是，在第一时段W1，在调制地技术方案中，由于域80与域90的电压参考基准不同，所以需做电平转换。
对应地，电平转换单元264中例如可通过设置开关切换元件，来分别控制在第一时段W1与第二时段W2是否对应对相应的信号做电平转换。然，所述开关切换元件或其它合适电路结构也可设置在电平转换单元264之外。
在本实施方式中，对驱动电路20中各电路模块或电路单元在两个域80、90的划分情况为：将显示驱动电路20a、触摸驱动电路23、信号处理电路26的一部分(运算放大器231、模 拟-数字信号转换单元263)、数据选择电路24、和控制电路25均划分在以MGND为基准的域90中，另外，触摸显示面板10也划分在域90中；将调制电路21、显示处理电路205、计算单元265、电压产生电路27、斜率控制器204均划分在以GND为基准的域80中；电平转换单元264横跨两个域，即，一部分在域80中，一部分在域90中，对于本领域的一般技术人员，其根据本申请的记载以及电路原理是可以确定电平转换单元264分别位于域80与域90的部分，此处对此不再赘述。
可变更地，本发明对驱动电路20在上述两个域80、90的划分方式也可为其它合适的情况，并不局限于上述实施方式所述的划分。
需要进一步说明的是，从域80输出到域90的信号会被调制信号MGND调制，对应地，从域90输出到域80的信号也会被进行相应调制，如，与调制信号MGND相反的调制等。
由于触摸显示面板10在执行触摸感测时的信号被调制信号MGND整体同步调制，其中，驱动电路20提供给公共电极101执行图像显示的显示驱动信号，即，公共电压，如，第二公共电压Vc2，经调制信号MGND调制后，能同时适用于驱动公共电极101执行触摸感测，从而，在保证触摸显示面板10执行正常图像显示的同时，可进一步驱动公共电极101执行触摸感测，另，还可以提高触摸显示装置1的信噪比，进而提高触摸感测精度。
请继续参阅图14，在本实施方式中，在第一时段W1，由于所述驱动电路20的一部分是在以GND为基准的域80中，一部分是在以MGND为基准的域90中，因此，可能会有域90中的电流反灌至域80的可能，为了防止这种现象，所述电子设备100可进一步包括保护电路15，所述保护电路15设置在域80与域90之间。
具体地，所述驱动电路20进一步包括第一电源端206和第二电源端207。其中，所述第一电源端206位于域90中。所述第二电源端207与所述主控芯片3的供电电源端31连接。所述主控芯片3通过所述供电电源端31输出电源电压给所述第二电源端207。所述保护电路15连接在所述第二电源端207与所述第一电源端206之间。
当所述调制信号MGND为驱动信号(即，第二参考信号)时，所述保护电路15对应断开所述第一电源端206与所述第二电源端207之间的连接；当所述调制信号MGND为接地信号GND(即，第一参考信号)时，所述保护电路15对应闭合所述第一电源端206与所述第二电源端207之间的连接。
请参阅图15，图15为保护电路15的一实施方式的电路结构示意图。在本实施方式中，所述保护电路15包括二极管J1。所述二极管J1的阳极连接第二电源端207，所述二极管J1的阴极连接第一电源端206。
可选地，所述保护电路15进一步包括第一电容Q1和第二电容Q2。其中，所述第一电容Q1连接于所述二极管J1的阳极与加载有接地信号GND的设备地之间，所述第二电容Q2连接于所述二极管J1的阴极与加载有调制信号MGND的调制地之间。其中，所述第一电容 Q1与二极管J1设置在域80中，所述第二电容Q2设置在域90中。
所述保护电路15并非限制以上实施方式所述，如，请参阅图16，图16为保护电路15的另一实施方式的电路结构示意图。为了清楚区别图15所示的保护电路15，图16所示的保护电路被标示为15a。所述保护电容15a包括第三有源开关151和控制单元153。所述第三有源开关151包括控制端K3、第一传输端T5、和第二传输端T6。所述第三有源开关151的控制端K3连接所述控制单元153，所述第一传输端T5连接所述第二电源端207，所述第二传输端T6连接所述第一电源端206。当所述调制信号MGND为驱动信号时，所述控制单元153控制所述第三有源开关151截止，所述保护电路15a对应断开所述第一电源端206与所述第二电源端207之间的连接；当所述调制信号MGND为接地信号GND时，所述控制单元153控制所述第三有源开关151导通，所述保护电路15a对应闭合所述第一电源端206与所述第二电源端207之间的连接。所述第三有源开关151如为薄膜晶体管、三极管、金属氧化物半导体场效应管。
另外，可选地，所述保护电路15a进一步包括第一电容Q1与第二电容Q2。其中，第一电容Q1连接于第一传输端T5与加载有接地信号GND的设备地之间，所述第二电容Q2连接于第二传输端T6与加载有调制信号MGND的调制地之间。
可变更地，在其它实施方式中，所述调制电路21也可通过对驱动电路20中的供电电源或参考电源进行调制，来达到对触摸显示面板10的所有信号进行整体同步调制，而并非限制对设备地进行调制。例如，所述调制电路21的调制端M除了可连接或用作前述第一接地端201之外(在调制地时)，还可连接或用作前述第一电源端206(在调制供电电源时)。当连接或用作所述第一电源端206时，所述调制电路21连接于第一电源端206与第二电源端207之间。所述第一电源端206相对于第一接地端201来说，也称为供电电源端，二者所加载的电压保持恒定。
另外，除了所述第一电源端206与所述第一接地端201之外，驱动电路20通常包括参考电源端(图未示)，当第一电源端206用于加载第一电源电压、第一接地端201用于加载第二电源电压时，所述参考电源端用于加载第三电源电压，所述第三电源电压的高低介于所述第一电源电压与第二电源电压的高低之间，其中，所述第一电源电压与第二电源电压的压差保持恒定，所述第一电源电压与第三电源电压的压差保持恒定。所述参考电源端也可用作或连接所述调制端。即，所述供电电源端、参考电源端、和第一接地端三者中之一者用作或连接所述调制端，对应地，用作或连接所述调制端的电源电压包括调制信号。
相应地，在第二时段W2，所述调制端M加载一恒定电压，所述驱动电路20提供第二灰阶电压Vd2给像素电极103、提供第二公共电压Vc2给公共电极101，驱动所述触摸显示面板10执行图像显示；在第一时段W1，所述调制端M加载调制信号，驱动电路20提供第一灰阶电压Vd1给像素电极103、提供第一公共电压Vc1给公共电极101，驱动所述触摸显示 面板10执行图像显示的同时，进一步驱动公共电极101执行自电容触摸感测。
另外，前述各实施方式的触摸显示装置1以及电子设备100中也可减少或增加某些元件或组合电路等，对于本领域的一般技术人员而言，只要是通过公知常识、现有技术、并结合本申请的技术内容能够合理推导出的技术方案均应落入本申请的保护范围。
可变更地，在其它实施方式中，公共电极101例如作为发射电极，扫描线281例如作为接收电极，公共电极101与扫描线281之间形成互电容，所述驱动电路20也可驱动触摸显示面板10执行互电容触摸感测。
在其它实施方式中，对于前述各实施方式的触摸显示装置1以及电子设备100，所述驱动电路20除可采用通过调制地或调制供电电源或调制参考电源来整体同步调制触摸显示面板10的所有信号，来达到同时驱动触摸显示面板10执行图像显示与触摸感测的方式之外，可替代地，当触摸显示装置1同时执行图像显示与触摸感测时，也可采用非调制地或非调制供电电源或非调制参考电源等的非调制技术方案进行驱动，即，电子设备100在工作时采用以接地信号GND为电压参照基准的一个域80。
虽然实施方式这里已经关于具体的配置和操作序列进行描述，但是应该理解，替代的实施方式可增加、省略或改变元件、操作等等。因此，这里公开的实施方式意味着是实施例而不是限制。

Claims (19)

  1. 一种具有触摸功能的液晶显示装置，包括：
    液晶显示面板，包括
    多个像素电极；
    多条扫描线；
    多条数据线；
    多个控制开关，每一控制开关包括控制电极、第一传输电极、和第二传输电极，其中，所述控制电极与所述扫描线连接，所述第一传输电极与所述数据线连接，所述第二传输电极与所述像素电极连接；和
    多个公共电极；和
    驱动电路，通过提供第一扫描开启信号给扫描线，激活与扫描线相连接的控制开关，并通过数据线和激活的控制开关提供第一灰阶电压给像素电极，以及提供相同的第一公共电压给所述多个公共电极，驱动所述液晶显示面板同时执行图像显示刷新与触摸感测；
    其中，所述第一扫描开启信号、第一灰阶电压、第一公共电压均为经一调制信号同步调制后的信号，所述驱动电路通过提供所述第一公共电压给所述多个公共电极，驱动所述多个公共电极执行图像显示的同时，进一步驱动公共电极执行触摸感测。
  2. 根据权利要求1所述的液晶显示装置，其特征在于：所述第一公共电压相对所述调制信号保持不变。
  3. 根据权利要求1所述的液晶显示装置，其特征在于：当所述驱动电路提供所述第一扫描开启信号给一扫描线时，驱动部分公共电极执行触摸感测。
  4. 根据权利要求1所述的液晶显示装置，其特征在于：所述驱动电路用于驱动所述多个公共电极执行自电容触摸感测。
  5. 根据权利要求1-4中任意一项所述的液晶显示装置，其特征在于：当所述驱动电路驱动所述液晶显示面板同时执行图像显示刷新与触摸感测时，所述液晶显示面板上的信号均为经所述调制信号同步调制后的信号。
  6. 根据权利要求5所述的液晶显示装置，其特征在于：所述驱动电路包括调制电路与第一接地端，所述调制电路用于产生所述调制信号，当所述调制电路输出所述调制信号给所述第一接地端时，所述液晶显示面板上的信号均为经所述调制信号同步调制后的信号。
  7. 根据权利要求6所述的液晶显示装置，其特征在于：所述驱动电路通过控制所述调制电路输出所述调制信号给第一接地端，利用所述调制信号同步调制所述液晶显示面板的所有信号，并利用所述第一公共电压驱动公共电极执行自电容触摸感测，来驱动所述液晶显示面板同时执行图像显示刷新与触摸感测。
  8. 根据权利要求6所述的液晶显示装置，其特征在于：所述驱动电路同时提供相同的第一公 共电压给所述多个公共电极，并分时接收来自所述多个公共电极输出的触摸感测信号，以获取触摸信息，其中，所述驱动电路驱动公共电极执行触摸感测的第一公共电压同时用作显示驱动信号与触摸驱动信号。
  9. 根据权利要求8所述的液晶显示装置，其特征在于：所述驱动电路包括触摸驱动电路、公共电压产生电路、和数据选择电路；所述触摸驱动电路通过所述数据选择电路与所述多个公共电极可选择性连接，所述公共电压产生电路通过所述数据选择电路与所述多个公共电极可选择性连接；其中，所述公共电压产生电路用于驱动所述多个公共电极执行图像显示，所述触摸驱动电路用于驱动所述多个公共电极执行图像显示和自电容触摸感测。
  10. 根据权利要求9所述的液晶显示装置，其特征在于：当所述驱动电路驱动所述液晶显示面板同时执行图像显示刷新与自电容触摸感测时，所述多个公共电极接收到的所述第一公共电压分别来自所述公共电压产生电路和所述触摸驱动电路。
  11. 根据权利要求9所述的液晶显示装置，其特征在于：所述公共电压产生电路包括：
    信号源，包括接地端和输出端，所述接地端与所述第一接地端连接；
    第一放大器，包括第三电源端、第三接地端、第一同相端、第一反相端、和第一输出端，其中，所述第三电源端用于加载电源电压，所述第三接地端与所述第一接地端连接，所述第一同相端连接所述信号源的输出端，所述第一反相端与所述第一输出端连接，所述第一输出端用于通过数据选择电路与公共电极可选择性连接；和
    稳压电容，包括相对的第一极板和第二极板，其中，第一极板连接在数据选择电路与第一输出端之间，第二极板连接至所述第一接地端。
  12. 根据权利要求11所述的液晶显示装置，其特征在于：所述触摸驱动电路包括：
    所述信号源；和
    多个运算放大器，每一运算放大器包括第二放大器和反馈支路；每一第二放大器包括第四电源端、第四接地端、第二同相端、第二反相端、和第二输出端，其中，所述第四电源端用于加载电源电压，所述第四接地端与所述第一接地端连接，所述第二同相端连接所述信号源的输出端，所述第二反相端通过反馈支路与所述第二输出端连接，所述第二反相端进一步通过数据选择电路与公共电极可选择性连接。
  13. 根据权利要求12所述的液晶显示装置，其特征在于：所述驱动电路进一步包括信号处理电路，所述第二输出端进一步连接所述信号处理电路，所述信号处理电路用于接收来自触摸驱动电路输出的触摸感测信号，以获得触摸信息。
  14. 根据权利要求10所述的液晶显示装置，其特征在于：所述多个像素电极与所述多个公共电极均呈二维阵列排布，当所述驱动电路驱动所述液晶显示面板同时执行图像显示刷新与自电容触摸感测时，在同一时刻，执行触摸感测的公共电极所正对的像素电极与执行图像显示刷新的像素电极之间间隔多行处于图像显示保持状态的像素电极。
  15. 根据权利要求1所述的液晶显示装置，其特征在于：所述驱动电路进一步用于通过提供第二扫描开启信号给扫描线，激活与扫描线相连接的控制开关，并通过数据线和激活的控制开关提供第二灰阶电压给像素电极，以及提供第二公共电压给公共电极，来驱动液晶显示面板执行图像显示刷新而非同时执行触摸感测。
  16. 根据权利要求15所述的液晶显示装置，其特征在于：所述第二扫描开启信号为所述第一扫描开启信号经所述调制信号调制后的信号，所述第一公共电压为所述第二公共电压经所述调制信号调制后的信号。
  17. 根据权利要求6所述的液晶显示装置，其特征在于：定义存在公共电极执行触摸感测的时段为第一时段，定义所述多个公共电极均执行图像显示而非同时执行触摸感测的时段为第二时段，所述第一时段与所述第二时段交替进行；所述驱动电路输出至所述液晶显示面板上的信号均是以所述第一接地端上的信号为电压参照基准；在第一时段，所述调制电路输出所述调制信号给第一接地端；在第二时段，所述调制电路输出接地信号给第一接地端。
  18. 根据权利要求12所述的液晶显示装置，其特征在于：当所述驱动电路驱动所述液晶显示面板同时执行图像显示刷新与触摸感测时，所述信号源的输出端输出与所述第一公共电压相同的第一参考电压信号给第一同相端和第二同相端。
  19. 一种电子设备，包括权利要求1-18中任意一项所述的液晶显示装置。
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