WO2018058647A1 - Touch display unit and electronic device - Google Patents

Touch display unit and electronic device Download PDF

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Publication number
WO2018058647A1
WO2018058647A1 PCT/CN2016/101339 CN2016101339W WO2018058647A1 WO 2018058647 A1 WO2018058647 A1 WO 2018058647A1 CN 2016101339 W CN2016101339 W CN 2016101339W WO 2018058647 A1 WO2018058647 A1 WO 2018058647A1
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WO
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signal
touch
circuit
plurality
common
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PCT/CN2016/101339
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French (fr)
Chinese (zh)
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林峰
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深圳深微创芯科技有限公司
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

Abstract

A touch display unit (1) and an electronic device (100). The touch display unit (1) comprises a touch display panel (10) and a driver circuit (20). The touch display panel (10) comprises multiple pixel electrodes (103) and multiple common electrodes (101). The driver circuit (20) is used for driving the touch display panel (10) to perform image displaying, and further used for driving the common electrodes (101) to perform touch sensing. When the driver circuit (20) drives the touch display panel (10) to simultaneously perform image displaying and touch sensing, signals on the multiple pixel electrodes (103) are first gray-scale voltages (Vd1), and signals on the multiple common electrodes (101) are first common voltages (Vc1), wherein the first gray-scale voltages (Vd1) and the first common voltages (Vc1) are all signals modulated by a modulation signal. The electronic device (100) comprises the touch display unit (1).

Description

Touch display device and electronic equipment FIELD

The present invention relates to a touch display technology, and particularly relates to a touch display having a touch display device and an electronic apparatus.

Background technique

Typically, the touch display apparatus includes a plug-in, On-Cell (upper case type), In-Cell (type or the embedded box) of three types of the touch panel display. As technology advances, so to further thin the touch panel display, and to improve the brightness of the touch panel display, In-Cell type touch panel display is becoming the trend.

In the touch display apparatus is a liquid crystal display device as an example, typically, a liquid crystal display device includes a liquid crystal display panel for driving the liquid crystal display panel performing image display driving circuit and the touch sensing. The liquid crystal display panel comprising 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 comprises a gate, a source, and a drain. Wherein the gate connected to the scan lines, data lines connected to the source electrode, the drain connected to the pixel electrode. The transistor drive circuit for supplying scan signals to the scan lines, and activates the scan lines are connected, and provides the gray scale voltage through the data lines and activating a transistor to the pixel electrode, and the common voltage to the common electrode to drive the liquid crystal display panel image display is refreshed.

When the driving circuit supplies the scan signals to the scan line, the gray scale voltage is transmitted to the given row of pixel electrodes connected to the scanning lines, the scanning signal and providing said time gap before another scan line to called line clearance. In other words, after the drive circuit providing the gray scale voltage to the row of pixel electrodes, provided in the gray scale voltage to the pixel row time before another row electrode gap to gap. Further, after the drive circuit providing a grayscale voltage to all the pixel electrodes, to provide the gray scale voltage to another frame time before all the pixel electrodes may also be referred to as a gap-frame gap. Line gap, the gap frame, no transmission of the gray scale voltage, i.e., no refresh of the image display, respectively, at this time, the entire liquid crystal display panel in an image display state maintained.

Conventional liquid crystal display device performs the general touch sensing gap in the row of touch sensing electrodes. Generally, to perform with the touch sensing, to ensure long-time touch sensing, the gap is generally extended row. The touch sensing electrodes of the common electrodes, for example, the multiplexing. When the common electrode multiplexes touch sensing electrodes, said driving circuit is generally different from the common voltage to provide a driving signal to the common electrode touch the touch sensing performed. Typically, with respect to the common voltage ground signal GND (e.g., 0 volts) at a constant voltage signal, the touch signal is a periodic variation having a predetermined frequency square-wave pulse signal with respect to the ground GND driven to improve the touch sensing signal to noise ratio. As can be seen, the liquid crystal display device performs time-division image display and touch sensing refreshed, thus reducing the interaction between the image display and touch sensing some extent.

However, with the gradual increase the resolution of the liquid crystal display device, for example, the resolution of the liquid crystal display device of a mobile phone are increasingly using 2K (eg, 2560x1440) resolution, or even higher resolution, the display refresh rate is generally used 60HZ, the line gap, the gap will be significantly compressed frame, if we use only the line gap, the gap frame touch sensing electrodes of the touch sensing will be performed due to insufficient time to cause significant problems touch sensing is not sufficiently performed . When the refresh rate when to 120HZ, can be used for touch sensing in less time.

SUMMARY

The present invention is intended to solve at least one prior art technical problem. To this end, the present invention desirable to provide a touch display device and an electronic device.

The present invention provides a touch display apparatus, comprising:

The touch panel display, comprising a plurality of pixel electrodes and between a plurality of common electrodes, wherein the plurality of pixel electrodes and common electrodes for forming a plurality of the fringe electric field; and

A drive circuit for driving the touch display panel performing image display, but also for driving the common electrode to perform a touch sensing;

When the drive circuit drives the touch panel display refresh while performing image display and touch sensing sensing a plurality of signals on a first gray scale voltage to the pixel electrode, the common electrode on the plurality of signals for the same a first common voltage, wherein the first gray voltage and the first voltage are common after a signal modulation signal.

Alternatively, the first gray level voltage and the first common voltage increased with increase of the modulation signal is raised, with the decrease of the modulated signal is reduced.

Alternatively, the first gray level voltage and the first common voltage signals are the modulated signal by synchronous modulation.

Alternatively, the same driving circuit for providing a first plurality of common voltage to the common electrodes while image display is performed, or simultaneously receiving is further configured to time-touch sensing electrodes from said plurality of common output signal to obtain touch information.

Alternatively, when the drive circuit providing the gray scale voltage to a first portion of the pixel electrode, a first common voltage to provide the same to the plurality of common electrodes, while driving the touch panel and performs image display refresh touch is sensed, the remaining signals on the pixel electrode in a floating state due to capacitive coupling of the modulated signal is superimposed.

Alternatively, a plurality of common electrodes of pixel electrodes in the same layer, a plurality of common electrodes in the same layer, a plurality of stacked between the pixel electrode and the plurality of common electrodes, wherein the plurality of number is less than the number of the plurality of pixel electrodes.

Alternatively, when the drive circuit simultaneously drives the touch display panel performing image display refresh the touch is sensed, the image displayed does not overlap between the pixel electrode and the common electrode touch sensing performing refresh.

Alternatively, the touch panel display further comprises:

A plurality of scan lines;

A plurality of data lines;

A plurality of switching transistors, each transistor switch includes a control electrode, the first transfer electrode, and a second transfer electrode, wherein the scanning line connected to the control electrode, the first transfer electrode and the data line, a second transfer electrode connected to the pixel electrode ;

When the drive circuit drives the touch panel display while performing image display and touch sensing sensing a plurality of scan line signals are signal after the modulation signal.

Alternatively, the drive circuit for providing a first scan signal to the scan line is turned on, activating transistor switch connected to the scanning line, there is provided a first gray-scale voltage to the plurality of data lines, and activated by transistor switch is transmitted to the corresponding pixel electrode, a first common supply the same voltage to the plurality of common electrodes, and receiving a touch sensing signal output from the common electrode, to drive the touch panel display while performing image display refresh and self capacitive touch sensing.

Alternatively, the drive circuit comprises a modulation circuit, a first ground terminal, and a second ground terminal, the modulation circuit connected between the first ground terminal and said second ground terminal, said second ground a ground terminal for receiving a signal, a modulation circuit in accordance with the ground for signal and generating a driving signal of the modulated signal and outputting the modulated signal to the first ground terminal, said first signal when the ground terminal when the modulation signal, the signal on the panel are the signal after the modulation signal of the touch display.

Alternatively, when the signal of the first ground end of said modulation signal, the touch signal or a signal outputted from the driving circuit on the display panel due to capacitive coupling, or the modulating signal is superimposed.

Alternatively, the drive circuit further includes a common voltage generating circuit, the touch driving circuit and a data selection circuit, wherein said data selecting circuit and said plurality of common electrodes are connected, the common voltage generating circuit through said the data selection circuit selectively connecting the plurality of common electrodes, the touch circuit and the driving circuit selects the plurality of common electrodes may be selectively connected by the data, the common voltage generating circuit is used by the data a first selection circuit provides the common voltage to the common electrode performs image display, the touch drive circuit for providing the first common voltage to the common electrode while performing image display and touch sensing by said data selection circuit.

Alternatively, the drive circuit further includes a control circuit, the control circuit and the data selection circuit connected to the control circuit by controlling the data selection circuit, a control corresponding to the common voltage generating circuit and said plurality of the number of common electrode connections, and controlling the number of touch drive circuit connected to the plurality of common electrodes.

Alternatively, the control circuit, the common voltage generating circuit, the touch driving circuit and the data selection circuit are connected to the first ground terminal.

Alternatively, when the touch driving circuit through the data selection circuit providing a first portion of the common voltage to the common electrode while performing image display and touch sensing sensing, all the rest of the common voltage generating circuit providing a first voltage to the common or performing image display portion of the common electrode.

Alternatively, the data selection circuit comprises a first data selector and a plurality of second data selector, wherein the common voltage generating circuit by selecting said first data and said plurality of common electrodes may be selectively connected to a plurality of touch drive circuit via said second data selector and said plurality of common electrodes may be selectively connected to a second data selector for each portion of the common electrode.

Alternatively, the first data selector comprising a first plurality of output ports, each of the second data selector comprises a plurality of second output ports, each output port are respectively connected to a second common electrode, the first each data output port of a first selector connected between the second output port and the common electrode.

Alternatively, a plurality of second output ports correspond to each of the plurality of first output ports of said second data selector connected to the first data selector, or the first plurality of data selector a first portion of the second output port and the second output port is connected to the data selector, or the first plurality of data ports and a first output portion of the second data selector to select a plurality of a second output port a corresponding connector.

Alternatively, a plurality of common electrodes are a common electrode arranged in rows and columns, a plurality of second output ports of the second data selector are connected to the same column or the same row.

Alternatively, the number of the plurality of common electrodes are arranged in rows and columns, the plurality of second data selector and said plurality of common electrodes of the same number of columns, each of the plurality of the second data selector a second output port of said plurality of common electrodes of the same number of rows, each of the plurality of second output ports of the second data selector are connected to a common electrode correspondence, or a plurality of second data the number of said plurality of selector same number of rows and the common electrode, a second plurality of output ports each second data selector and said plurality of common electrodes of the same number of columns, each second data selector a second plurality of output ports respectively connected to the common electrode line one by one.

Alternatively, the common voltage generating circuit comprises:

Signal source, comprising a ground terminal and an output terminal, said ground terminal and said first ground terminal; and

Follower connected to the first ground terminal, said follower by said data selection circuit of the plurality of common electrodes may be selectively connected to said follower for transmitting a signal output by the signal source to the said data selection circuit.

Alternatively, the touch drive circuit comprising:

The signal source; and

A plurality of operational amplifiers, each connected to said first ground terminal, each part of the operational amplifier and the common electrode selection circuit is selectively connected by said data, said operational amplifier for transmitting the output of said signal source to the data selection circuit, and a transmission signal from the common touch sensing electrodes.

Alternatively, the common voltage generating circuit further comprises a voltage regulator circuit connected to said follower between the first ground terminal, the voltage regulator circuit for a signal output by the follower regulator.

Alternatively, the follower comprises a first amplifier, said first amplifier comprises a comprises a third power supply terminal, a third ground terminal, a first non-inverting terminal, a first inverting terminal, and a first output terminal, wherein, said third power supply voltage terminal for loading said third ground terminal connected to said first ground terminal, said first inverting terminal connected to the output terminal of the signal source, the first inverter terminal connected to the first output terminal, the first output terminal for by the data selection circuit selectively connecting the plurality of common electrodes.

Alternatively, each of the operational amplifier and the second amplifier comprises a feedback branch; the second amplifier comprises a fourth power supply terminal, a fourth ground terminal, a second terminal of the same phase, a second inverting terminal, and a second output terminal, wherein said fourth power supply voltage terminal for loading said fourth ground terminal connected to the first ground terminal, a second terminal connected with the output of said phase signal source, said second inverter through a feedback branch is connected to the second output terminal, the second inverter circuit terminal further selected portion of the common electrode is selectively connected by data.

Alternatively, when the ground terminal to the first modulation output signal of the modulating circuit, to the inverting terminal of the first signal source via a corresponding output signal of said first modulated signal modulated reference voltage and a second non-inverting terminal of the operational amplifier, and a corresponding follower by said data selection circuit outputs the first reference voltage signal identical to the first common voltage to the plurality of common electrodes, to drive the touch panel display simultaneously performing image display and touch sensing.

Alternatively, the driving circuit further includes a signal processing circuit connected to the output of said second signal processing circuit for receiving the output of the common electrodes of the touch sensing signal to obtain touch information.

Alternatively, the signal source is a direct current source.

Alternatively, the drive circuit for driving said plurality of common electrodes perform self-capacitance touch sensing.

Alternatively, the first common voltage corresponding to the modulated signal remain unchanged.

Alternatively, the drive circuit for driving the touch display panel performing image display refresh, providing the same by a first common voltage to the plurality of common electrodes, the driving of the plurality of common electrodes perform image display, and further driving the common electrode to perform a touch sensing.

Alternatively, the drive circuit further includes a voltage generating circuit, the voltage generation circuit for generating the drive signal, the second ground terminals for connection to a device, receiving a signal from the device to the ground, the the modulating circuit generates a modulated signal according to the drive signal and the ground signal.

The present invention also provides an electronic device, said electronic device comprising a touch to any one of the above-described display device.

Because when the drive circuit drives the touch panel display while performing image display and touch sensing, the plurality of signals on a first gray scale voltage to the pixel electrode, the common electrode on the plurality of signals to a first the common voltage, wherein the first gray voltage and the first common voltage signal by both a modulation signal, thus, the touch display means performs image display in any procedure can be executed in the touch sensing measured, and the less influence each other between the touch sensing and image display. Accordingly, the touch display having electronic apparatus user experience better.

BRIEF DESCRIPTION

Figure 1 is a structural schematic diagram of the invention the electronic device.

FIG 2 is a signal waveform diagram of the embodiment of part of an embodiment of the electronic device 1 shown in FIG.

3 is a schematic view of an electronic device according to an embodiment of the circuit configuration shown in FIG.

FIG 4 is a schematic diagram of an embodiment of a modulation circuit in the circuit configuration shown in FIG. 3.

FIG 5 is a schematic circuit configuration of the signal source driving circuit of a conventional touch.

FIG 6 is a schematic circuit diagram of the touch signal source driving circuit shown in FIG. 3.

FIG 7 is a schematic structural diagram of the electronic circuit apparatus shown in Figure 1 a specific embodiment.

8 is an exploded schematic view of a touch configuration shown in FIG 7 according to an embodiment of the display panel.

FIG 9 is a schematic cross-sectional structure of a touch panel display 8 shown in FIG.

Cross-sectional schematic view of another embodiment of a display panel in FIG. 10 is a touch of Figure 7.

Schematic top view of the panel shown in FIG. 11 is a touch display 10 in FIG.

FIG 12 is a configuration block diagram of an embodiment of a signal processing circuit 3 shown in FIG.

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

Schematic structural diagram of still another embodiment of the present invention. FIG. 14 of the electronic device.

FIG 15 is a schematic diagram of an embodiment of a protection circuit in the circuit configuration shown in FIG. 14.

FIG 16 is a schematic circuit diagram of another embodiment of the protection circuit.

detailed description

For the above objects, features and advantages of the present invention can be more fully understood by reading the following detailed description of the drawings Specific embodiments of the present invention binds. However, exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and the concept of example embodiments will fully convey the to those skilled in the art. For convenience or clarity, it may be exaggerated, omitted or schematically illustrated thickness and size of each layer shown in the drawings, and the number of schematically shows the relevant element. Further, the size of elements does not utterly reflect an actual size of the correlation and the number of elements does not utterly reflect an actual number. Since the drawings of different sizes and other reasons, the presence of identical or similar or related not coincide with the number of elements shown in the various figures. In the drawings the same reference numerals designate the same or similar structure. However, to be noted that, in order to make logical numeral regularity and the like, in some different embodiments, the same or similar elements or structures using different reference numerals, based on the associated technology and associated text , those skilled in the art that directly or indirectly informed judgment.

Furthermore, the described features, structures, may be combined in one or more embodiments in any suitable manner. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the present invention. However, those skilled in the art will appreciate, no specific details of the one or more, or with other structures, and the like component may be practiced aspect of the present invention. In other instances, not shown in detail or described in well-known structures or operations to avoid obscuring the present invention.

Further, the following terms are exemplary and not intended to be limiting in any way. After reading this application, those skilled in the art will recognize that these terms apply to expressions techniques, methods, systems, and the physical components (regardless of whether currently known), including those in the art after reading the present application inferred or inferable thereof extension.

In the description of the present invention, it will be appreciated that: "a plurality" includes two and more than two, "plurality" includes two and more than two, "multiple satellites" includes more than two and two, "Multi- line "includes more than two lines and two lines of" multi-column "includes more than two and two, except as otherwise expressly application specific limitation. Further, each of the elements, and the name "first," "second," "third," "fourth," and the like words appearing in the signal name is not defined or the signal sequence elements appear, but for convenience designated element, clearly distinguish one element, such concise description more comprehensible. To avoid confusion understand the need to further advance Description are:

For the display device, a display device includes a display panel and a driving circuit. The driving circuit for driving the display panel performing image display. The display panel generally comprises a plurality of pixels, each pixel comprising a first electrode and a second electrode, during operation, the pressure differential between the first electrode and the second electrode determines the display gradation of the pixel level. Wherein said plurality of pixels, for example, a first electrode connected to each other as a unitary structure, a whole layer of the electrode, the second plurality of pixel electrodes each other discrete structures. It is provided by the drive circuit to the first electrode of each pixel in the same voltage (e.g., 0 volts), to the second electrode of each pixel to provide different voltages, enabling image display different gray .

When the display device is a liquid crystal display device, the first electrode is a common electrode, the second electrode is a pixel electrode. The drive circuit by providing a common voltage to the first electrode, a second electrode provided to the gray scale voltage for driving the liquid crystal display panel performing image display. Can be changed, the display device may also be other suitable types of display devices, such as an electronic paper display device or the like.

For each pixel, which generally includes the image display state of an image display state and an image display refresh hold. A single pixel, for example, when providing the gray scale voltage to the second electrode of the driving circuit, providing a common voltage to the first electrode, the pixel image display started refreshing, when the gray scale voltage written to the first after two electrodes, stop providing gray scale voltage to the second electrode, image display refresh is complete. Thereafter, the image display pixel into the holding state, the time until the pixel gray scale voltage received.

Incidentally, the image display refresh process may further comprise a second electrode of the precharging or pre-discharging, when the second electrode of the same row of the same voltage and then reaches the gray scale voltage to the second electrode provided to achieve a predetermined gray scale pictures .

As can be seen, the image display refresh purposes, i.e. when the first electrode receives a common voltage, the second electrodes during a gray scale voltage writing.

Generally, the plurality of pixels arranged, for example, as a determinant. The driving circuit is generally driven row by row or pixel refresh image display is performed.

Here noted that the image display image display refresh holding two different display states, to prepare for a better understanding of the various embodiments of the present invention is described below. In addition, more specifically the "image display refresh" and "image display Hold" are two different technical concepts.

Incidentally, the first and second electrodes in a display device is called specific different types vary for each of the display devices suitable type of application of this application, the first electrode is called a unified common electrode, said unified The second electrode is a pixel electrode. Accordingly, the display signal voltage is supplied to a first circuit electrode is the common driving voltage, the second voltage signal to the display gray scale voltage electrode.

The touch panel includes several types of resistive, capacitive, infrared touch panel, etc., wherein the application of the capacitive touch screen wider. And the capacitive touch screen comprising a mutual capacitance touch screen, and self-capacitance touch screen.

In a mutual capacitance based touch system, the touch screen may include (e.g.) driver regions and sense regions, such as drive lines and sense lines. In one example case, drive lines can be formed in a plurality of rows, and sensing lines may form a plurality of columns (e.g., orthogonal). The touch pixels can be provided at the intersections of rows and columns. During operation, available AC signal (AC) waveform to the excitation line, and a mutual capacitance can be formed between the row and column of the touch pixel. Some charge between when an object approaches the touch pixel, the pixel coupled to the rows and columns of touch may instead be coupled onto the object. This reduction is coupled to the charge on the touch pixel can result in a net mutual capacitance between row and column coupled to reduction and reduction of the AC waveform on the touch pixel. This reduces charge-coupled AC waveform can be detected and measured touch system to determine the position of the object when the touch of the touch screen.

In contrast, in the self capacitance based touch system, each of the touch pixels can be formed on the individual electrode is formed from the capacitance to ground. When an object approaches the touch pixel, the other ground capacitance (capacitance to ground) may be formed between the object and the touch pixel. The further capacitance to ground can result in a net increase in the self-capacitance touch pixel is subjected. This increase in self-capacitance touch system may be detected and measured to determine the position of the object when the touch of the touch screen.

Hereinafter, embodiments of the present invention will be described.

Referring to FIG. 1 and FIG. 2, a schematic diagram of the structure of the electronic device of FIG. 1 of the present invention. FIG 2 is a signal waveform diagram of the embodiment of part of an embodiment of the electronic device 1 shown in FIG. The portable electronic device 100, such as electronic products, smart home electronic products, electronic products and automotive and other suitable types of products, the present invention is not limited to this. The portable electronic products such as mobile phones, tablet PCs, laptop computers, wearable devices. The smart home electronics products such as desktop computers, refrigerators, washing machines, television. The vehicle electronic products such as navigation systems, car DVD and so on. The electronic device 100 includes a touch display apparatus 1. The touch display apparatus 1 and the image display for touch sensing. The touch display apparatus 1 as In-Cell (box type or embedded) type touch display device. The touch display device in the display apparatus 1, for example, a liquid crystal display device. Accordingly, the touch display apparatus 1 is a touch liquid crystal display device. The following primary display in the liquid crystal device as an example touch. However, to be changed, the touch display means 1 may also be other suitable types of display devices, e.g., electronic paper display device (EPD) and the like.

The touch display apparatus 1 includes a touch panel 10 and a display driving circuit 20. The touch panel display 10 includes a plurality of common electrodes 101. A plurality of common electrodes 101 and display electrodes as touch sensing electrodes. The driver 20 and the plurality of common electrodes 101 are connected to the circuit, for driving said plurality of common electrodes 101 perform image display, but also for driving said plurality of common electrodes 101 performing touch sensing. Preferably, the drive circuit 20 for driving said plurality of common electrodes 101 perform a self-capacitance touch sensing. However, the present invention is not limited thereto, the drive circuit 20 for driving the further plurality of common electrodes 101 perform other suitable types of touch sensing, for example, a mutual capacitance touch sensing, as long as disclosed in the present application is based on other changes in technology and ideas to do or expand the scope of protection should fall into the present application.

A plurality of common electrodes 101 are arranged, for example, a two-dimensional array, in particular, a plurality of common electrodes 101 in the X and Y directions were arranged in rows and columns, wherein, the X direction is a row direction, the said Y direction is a column direction. However, the change, in other embodiments, the plurality of common electrode 101 may form other regular or irregular arrangement, and do not limit this invention.

The driving circuit 20 for driving the touch panel 10 performs a display process of any of the displayed image, may further drive the common electrode 101 performs a self-capacitance touch sensing. Thus, even when the touch display resolution of the display device 1 is improved, and can not shorten the touch sensing time, and thus, increase the resolution of the display breaking caused by the touch sensing time sufficient technical bottlenecks. Accordingly, the user of the electronic device 100 is better experience.

In particular, the drive circuit 10 performs the image display panel 20 while the refresh may be performed to further drive the common electrode 101 from the capacitive touch sensing display drive the touch. Thus, the touch display is a touch sensing apparatus is not limited to the line gap I, space for the frame.

When the drive circuit 20 drives the touch panel display 10 while performing image display and touch sensing sensing, all electrical signals on the panel 10 after the signals are MGND a modulation signal modulating the touch display. The touch panel display 10 on the electric signals are, for example, with the modulation signal MGND raised is raised, with the decrease of the modulation signal MGND decreases.

The driving circuit 20, for example, by using synchronous modulation of said modulated signal MGND the touch panel 10 display all signals, to drive the touch display panel 10 performs image display at the same time, further driving said plurality of common electrodes 101 perform a self- capacitive touch sensing.

When the drive circuit 20 drives the touch panel display 10 while performing image display and touch sensing sense, display element on the touch panel 10 or the drive circuit 20 is driven directly or indirectly drives the drive circuit 20. A display element on the touch panel 10 as an example, when the element 20 is directly driving the drive circuit, said signal element is a modulated signal from modulated signal output driving circuit MGND 20; when the when said element 20 is not directly drive the drive circuit, for example, is driven by the capacitive coupling indirect drive circuit 20, a capacitive coupling exists between the drive circuit 20 is directly driven element and the driving circuit 20 is indirectly driven element, respectively, signal of the element due to capacitive coupling of the modulated signal is superimposed MGND. Thus, all the electrical signals on the panel 10 after the modulated signal are modulated signals MGND the touch display. In addition to the capacitive coupling of the touch panel 10 in the display element drive circuit 20, for example, may also be indirectly driven through the resistance element and the like.

However, the change, in other embodiments, the electrical signals on all the touch display panel 10 may also be a signal from the modulation drive are output from the circuit 20.

For example, the drive circuit 20 provides the same voltage Vc1 of the first common electrode 101 common to the plurality of image display is performed while driving the common electrode 101 may further perform a self-capacitance touch sensing. The first common voltage Vc1 of the modulated signal after the modulation signal MGND. For example, the pressure differential between the first common voltage Vc1 MGND the modulated signal remain unchanged. The first common voltage Vc1 MGND opposite said modulation signal remains unchanged. However, the change, the signal of the first common voltage Vc1 also be a pressure difference between said modulated signal Vc1 and relative change. Preferably, the first common voltage Vc1 respect to the ground GND signal as a change signal. The signal ground GND, for example, 0V (volts) constant voltage signal, but not limited to a constant voltage signal of 0V, but may be close to the constant voltage signal of 0V, the ground signal ground GND devices typically electronic device 100 voltage signal. The device known as the systems, for example for the power supply of the electronic device 100 is negative, the power supply such as a battery. The ground signal system, also known as a ground voltage GND, the signal system, the ground voltage equipment, or equipment to signals. Typically, the device is not the Earth to earth or absolute earth. However, when the electronic device 100 is connected via a conductor to earth ground, the device may also be earth ground.

In a common electrode 101 as an example, when the driving circuit 20 drives the common electrode 101 simultaneously performs image display and touch sensing, to provide the common voltage Vc1 of the first common electrode 101 serves as both a display drive signal to the touch drive signal; when the driving circuit 20 drives the common electrode 101 performs an image display not simultaneously perform a touch sensing when the voltage supplied to the first common electrode 101 as a common display driving signal instead of 101 as a touch drive signal simultaneously .

The drive circuit 20 may drive the plurality of common electrodes 101 performs time division sensing touch, may drive the plurality of common electrodes 101 while performing touch sensing.

Accordingly, when the drive circuit 20 drives the plurality of common electrodes 101 while performing touch sensing, to the plurality of first common voltage Vc1 while a common electrode 101 are used as the touch drive signal; when the driving circuit 20 drives the execution of the plurality of touch sensing electrodes 101 sharing common, common to the plurality of first common electrodes 101 of the voltage Vc1 is not used simultaneously touch drive signal. Therefore, it can be said common electrode driving circuit 20 drives 101 performs touch sensing voltage Vc1 of the first common drive signal to the touch.

When the drive circuit 20 drives the plurality of time-sharing common electrodes 101 performs touch sensing, although the drive circuit 20 provides the same to the first common voltage Vc1 plurality of common electrodes 101, but the drive circuit 20, the common electrode driving circuit 101 simultaneously performs image display configuration and the sensed touch with the common electrode driver 101 performs an image display, rather than simultaneously performing touch sensing circuit configuration is different.

Since the touch panel display 10 on all electrical signals are modulated by the modulation signal synchronized MGND, therefore, all the electrical signal after the display drive signal can be modulated to drive the touch panel display 10 performs a normal image display, and the display driving by the modulated signal, e.g., voltage Vc1 of the first common, while further adapted to drive the common electrode 101 performs self-capacitance touch sensing. Accordingly, the drive circuit 20 performs the process to display any image display panel 10, the driver can touch the display panel 10 performs touch sensing, and the touch sensing does not affect the normal display image sensing drives the touch. Further, even when the touch display resolution of the display device 1 is improved, and also does not touch sensing shortened time, thereby improving the user experience of the electronic device 100.

For a better understanding, reference to FIG. 7, the display 101 the pressure difference between the common electrode and the pixel electrode 103 of the pixel 11, the signal on the common electrode 101 and the pixel electrode 103 when the modulated signal is MGND after the synchronous modulation, the display does not change the pressure, normal image display, and a first common voltage Vc1 is supplied to the common electrode 101 is modulated by the signal of the modulating signal MGND, the first common ground signal relative to the voltage Vc1 GND is a signal change, thereby ensuring the touch panel display 10 during the normal display image can be performed simultaneously driving the common electrode 101 from the capacitive touch sensing.

Pixels for image display is performed and the refresh of pixels 11 perform image display holder 11, the image display is performed on the signal after the modulation signal refresh the pixels a pixel electrode 10311 is provided from the drive circuit 20 performs the image displayed on the pixel signal held in the pixel electrode due to capacitive coupling 10311 superimposing said modulated signal MGND.

The touch display apparatus 1, for example, high definition (HD) display device, a full high-definition (FHD) display means Ultra High Definition (UHD) device displays various types of display devices and the like, in correspondence, for example, display resolution 1280x720,1920x1080, 3840x2160, however, the display resolution is not limited thereto, e.g., when a display resolution of 2K, 2K 1920x1080 may, however, also be appropriate, other 2560X1440. Similarly, when the display resolution is 4K, when 8K, may also include a variety of cases, however, the touch display apparatus 1 are an image display process can be arbitrary, the touch sensing can be performed simultaneously, and the touch is not sensed affecting the normal image display. That is, the touch display apparatus 1 may perform image display and the self-capacitance touch sensing simultaneously.

In particular, the drive circuit 20 drives the touch display panel 10 performs image display refresh driving can be performed with the common electrode 101 from the capacitive touch sensing, acquires touch information. The image display refresh and self capacitance between a touch sensing may coexist, and the touch display image display device 1 and a higher quality touch sensing.

Since the signal is displayed on the touch panel 10 by the modulated signal MGND synchronous modulation, and through the first common voltage Vc1 of the modulated signal can be simultaneously used as a display driving and the touch drive signal, therefore, the touch display apparatus 1 may while performing image display refresh and self-capacitance touch sensing, and display the touch image display device 1 and there is no interference between the touch sensing or less interference.

Further, when the touch panel display 10 in the non-image display refresh state by driving the driving circuit 20, for example, a gap line I (see FIG. 2), a gap time frame, the driving circuit 20 may be performed together with driving the common electrode 101 from the capacitive touch sensing. At this time, the display state of the touch panel 10 in the entire image display is maintained, since the modulation signal to the output driver circuit 20 MGND to the touch panel 10 a display signal synchronous modulation, thus performing touch sensing does not change display electrodes 101, 103, the pressure difference between two pixels 11 (see FIG. 7), and accordingly, the touch display better quality image display and touch sensing panel 10.

Since the drive circuit 20 drives the touch panel 10 performs a display process of any of the displayed image, the common electrode 101 can be driven together to perform a touch sensing, therefore, manufacturers can set the required driving circuit 20 drives the common electrode 101 of the touch sensing execution period. Specifically, for example, the whole process or part of the image display is executed during the touch sensing. More specifically, for example, in the image display refresh period and / or rows gap I, space frame period, perform a touch sensing, and the like.

In the present embodiment, the drive circuit 20 simultaneously drives a plurality of common electrodes 101 perform image display, and time division driving said plurality of common electrodes 101 perform a self-capacitance touch sensing.

Incidentally, with respect to the plurality of common electrode 101 as a whole, the drive circuit 20 drives the plurality of time-sharing common electrodes 101 perform a self-capacitance touch sensing. However, for the portion of the common electrode 101 of the plurality of common electrodes 101, the driving circuit 20 but at the same portion of the common electrode driver 101 performs touch sensing. For example, the drive circuit 20 simultaneously drives each of the plurality of common electrode portion of the common electrode 101, the touch sensing is performed 101, driven by a number of occasions, the touch sensing to complete a common electrode common to all the 101. However, the change, the drive circuit 20 may drive each a common electrode 101 performs touch sensing.

In the present application, regardless of the drive circuit 20 drives a common electrode 101 each perform touch sensing, or each portion of the common electrode driving while performing touch sensing 101, as long as the drive circuit 101 driving the plurality of occasions by End common electrodes 101 perform a touch sensing, i.e., defining the drive circuit 20 to perform the touch sensing time division driving said plurality of common electrodes 101.

Specifically, the drive circuit 20 simultaneously providing the first common voltage Vc1 to the plurality of common electrodes 101, and receives the time-touch sensing signals from the output of the plurality of common electrodes 101, are simultaneously driven to achieve said plurality of common electrodes 101 perform image display, and time division driving said plurality of common electrodes 101 perform a self-capacitance touch sensing.

However, the change, in other embodiments, the driving circuit 20 can drive all of the plurality of common electrodes 101 performs image display and touch sensing.

For the time division drive circuit 20 drives the plurality of common electrodes 101 perform a self-capacitance touch sensing, for example, as: a row driving circuit 20 driving the common electrode 101 by performing a self-capacitance touch sensing. When the drive circuit 20 of the first common line to the common electrode voltage Vc1 101 performs self-capacitance touch sensing and image display is also provided common voltage Vc1 of the first common electrode 101 to perform the image display remaining rows. When the drive circuit 20 drives the common electrode line 101 after executing the self-capacitance touch sensing Next, another driving the common electrode line 101 performs self-capacitance touch sensing display image, and driving the common electrode 101 performs image remaining rows display. Thus, through a number of occasions, to complete a touch sensing driver for all of the common electrode 101.

The row driver circuit 20 may drive the common electrode 101 performs image display and touch sensing, one can simultaneously drive a plurality of lines of the common electrode 101 executes image display and the touch sensing.

Since the drive circuit 20 time-sharing (e.g., in rows, or row) driving the common electrode 101 performs self-capacitance touch sensing, therefore, the output pin of the integrated circuit driver chip 20 is compared to driving all the common electrode 101 performs a self-capacitance touch sensing chip output pin less, thereby reducing the integrated circuit chip area of ​​the drive 20, and thus achieve cost savings.

In various embodiments, the drive circuit 20 may drive a row of common electrodes 101 performs touch sensing, a driver can perform a plurality of rows common touch sensing electrode 101, but also all of the primary drive of the common electrode 101 while performing touch Sensing. Further, the drive circuit 20 by the row driver may not perform the common touch sensing electrodes 101, e.g., by performing column driving the common electrode 101 or the touch sensing driven by a non-regular manner to drive the common electrode 101 and the like perform the touch sensing etc. are also possible.

Further, the drive circuit 20 drives the plurality of time-sharing common electrodes 101 perform a self-capacitance touch sensing: each time the drive circuit 20 driving the common electrode 101 is performed between the touch sensing uninterrupted, i.e., the drive after the portion of the common electrode driving circuit 20 while performing touch sensing End 101, and then, while the other portion of the common driver performs touch sensing electrode 101; Alternatively, the driving circuit 20 intermittently driving said plurality of common electrodes 101 perform a self-capacitance touch sensing after the measurement, e.g., a first driving circuit 20 performs a predetermined touch sensing time of driving the common electrode 101, stop performing the touch sensing driven for a second predetermined time, then, and then drive the common electrode 101 performs touch sensing.

However, when the drive circuit 101 drives the plurality of common electrodes 20 perform the touch sensing simultaneously, may also be employed intermittent drive. That is, when the drive circuit 20 simultaneously drives a plurality of common electrodes 101 performed after the touch sensing a first predetermined time, stops driving the touch sensing performed a second predetermined time, then again simultaneously driving said plurality of common performing touch sensing electrode 101.

The driving circuit 20 may also be time-divisionally driven and driven simultaneously perform a combination of the plurality of touch sensing common electrode 101 are possible.

Note that the common electrode 101 of the driving circuit 20 drives two adjacent touch sensing may be performed partially overlapping or non-overlapping.

In particular, the drive circuit 20 for intermittently driving said plurality of common electrodes 101 perform a self-capacitance touch sensing mode, the presence of the common electrode defined period 101 for performing touch sensing a first period W1, defining the plurality of the common electrode 101 instead of performing image display are performed simultaneously touch sensing period of the second period W2. W2 between adjacent second period including a first period W1. For example, the first period and the second period W2 W1 alternately.

In the first period W1, the drive circuit 20 with the modulation signal synchronous modulation signal MGND the touch panel display 10, and accordingly, the drive voltage Vc1 of the first common circuit 20 outputs to the common electrode 101 is modulated simultaneously performing image display and a self-capacitance touch sensing.

To facilitate a clear distinction between signal and the second period W2 is described below, the drive circuit 20 is defined in a first period W1 of the output display signal to the touch panel 10 are a first signal, the drive circuit 20 is defined the second period W2 to the output signal of a second panel 10 are a signal of the touch display. Accordingly, the first signal comprises a first common voltage Vc1.

In each of the second period W2, the circuit 20 outputs a second driving signal to the touch display panel 10 performs image display.

Preferably, W2 of the second period, the driving circuit 20 is not synchronized with the modulation signal modulated signal MGND the touch panel display 10. Accordingly, for example, a signal of the first signal the second signal through said modulated signal MGND modulation. The driving circuit 20 outputs the first signal to the touch panel display 10 while performing image display and self-capacitance touch sensing.

The second signal comprises a second common voltage Vc2. In the second period W2, the output of the driver circuit 20 to the second common voltage Vc2 of the plurality of common electrodes 101 performs image display.

The first common voltage Vc1 Vc2, for example, the common voltage via the modulation signal to modulate the second signal MGND. The second common voltage Vc2 relative to signal ground GND, for example, a constant voltage signal. Liquid crystal display devices, the second common voltage Vc2 for example (-1) V, however, for other types of display apparatus, the second common voltage Vc2 is a voltage signal may also be other sizes. MGND said modulation signal such as a signal varying between 0 volts and 1.8 volts for. However, the present invention is not limited thereto, said modulation signal line MGND, the second common voltage signal Vc2 the like may also be other suitable type of signal, the following description will be related.

Since W2 of the second period, the driving circuit 20 is not synchronized with the modulation signal MGND signal modulating the touch panel display 10, e.g., using conventional display driving system is driven, therefore, the touch display device 1 in the second period W2 W1 compared to the modulation employed in the first period is relatively reduced power consumption aspect.

From the foregoing, the drive circuit 20 of the intermittent driving of the plurality of common electrodes 101 embodiment performs touch sensing, the touch display apparatus may perform not only a self-capacitance touch sensing any process that performs image display may also be try to avoid using the modulation scheme results in a large power consumption.

In the first period W1, the drive circuit 20 drives a plurality of rows, for example, the common electrode 101 executing the touch sensing, or all of the common electrode driver 101 executing the one touch sensing, or all of the common electrode driver 101 executing the plurality touch sensing. The same for all the drive circuit 20 drives the common electrode 101 implementation of complete multi-touch sensing can be divided into multiple cases, e.g., the driver circuit 20 drives all of the common electrodes of the touch sensing times finished execution 101 or, the driving circuit 20 drives the portion of the common electrode 101 times finished performing the same touch sensing, to drive the same number of another portion of the common electrode 101 executing the touch sensing, however, the drive circuit 20 drives the two portions of the common electrode different times 101 executing the touch sensing.

It should be noted that: the second period W2 longer required to set the touch display apparatus 1 as a whole does not exist impact detecting a touch operation, the opposite may also reduce power consumption to a certain extent.

When the length of each of the first period W1 is the same as example, the length of each of the second period W2 is the same as example. However, each of the first period W1 of the length of time may not be identical or differ from each other, each of the duration of the second period W2 is the same as or may not differ from each other. Further, for different types of touch display apparatus 1, for different size of the touch display apparatus 1, a different material for the first period W1 touch display apparatus 1, the second period W2 may correspond to different. Further, the touch display apparatus 1 to operate in different states, e.g., black standby state and bright screen image display, the first period W1, W2 is the length of the second period may be different provided to reduce power consumption .

However, the change may be, in some embodiments, W2 of the second period, the drive circuit 20 may still use the synchronous modulation signal modulated signal MGND the touch panel display 10 for display driving.

The following main driver circuit 20 intermittently drives the plurality of time-division manner, and common electrode 101 performs touch sensing on the device 1 and the touch display principle will be described.

Refer to FIG. 3, a schematic circuit diagram of a specific embodiment of the electronic device 100 of FIG. 3. The driving circuit 20 includes a 21, a modulation circuit common voltage generating circuit 22, the touch driving circuit 23, a data selection circuit 24, control 25, and a signal processing circuit 26 circuit. The common voltage generating circuit 22 and the touch data driving circuit 23 is connected to the selection circuit 24. The data selection circuit 24 is connected to the plurality of common electrodes 101. The control circuit 25 to the selecting circuit 24 is connected to the data. The common voltage generating circuit 22 and the touch driving circuit 23 selects the corresponding circuit 24 is selectively connected to the common electrode 101 through the data.

The common voltage generating circuit 22 for performing image display driving of the common electrode 101.

The touch drive circuit 23 for driving the common electrode 101 in the same image display simultaneously performs self-capacitance touch sensing.

The signal processing circuit 26 for performing a touch coordinate calculation according to the touch of the touch sensing signal output from the drive circuit 23 acquires the touch position information.

The data selection circuit 24 under the control of the control circuit 25 selects an output corresponding to the common voltage signal generating circuit 22 is generated to the corresponding common electrode 101 executes image display, and selecting an output of the touch drive circuit 23 generating a signal corresponding to the common electrode 101 performs image display and self-capacitance touch sensing.

The control circuit 25 according to a control signal, for example, the master chip 3, corresponding to the control signal output timing of the data selection circuit 24.

The modulation circuit 21 for generating the modulating signal MGND. The modulation signal is a square wave pulse MGND e.g. signal, comprising a first reference signal and the second reference signal. The first signal and the second reference voltage is a reference signal may be any one of the following five conditions:

First: the first reference signal voltage is a positive voltage, the second reference voltage signal is 0V;

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

Third: a first reference signal voltage is a positive voltage, the voltage of the second reference voltage signal is negative, 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.

Fourth: a first reference signal, a second reference signal voltage is a positive voltage different sizes.

Fifth: the first reference signal, the reference voltage of the second signal is negative voltages of different magnitude.

A ground GND as a reference signal, the first reference signal, the second reference signal are both constant voltage signal. The modulation signal is a square wave pulse signal a first reference signal and the second alternating reference signal.

The square wave pulse modulated signal, for example, periodically varying MGND. MGND the modulation signal is not limited to square-wave pulse, it can also be other suitable waveform signal, e.g., a sine wave signal, a step signal like two. Signal of the modulation signal is not limited to MGND periodically changes, changes may be non-periodic signal.

In the present embodiment, the first reference signal is a modulated signal MGND the GND ground signal, the second reference signal as the driving signal is higher than the first reference signal. For example, the ground signal GND is 0V, the drive signal is 1.8V. However, the ground signal is 0V, 1.8V is the drive signal is merely an example, can be adjusted according to the situation corresponding to the amplitude of the product, it does not limit this invention.

Specifically, the drive circuit 20 may further include a voltage generation circuit 27. The voltage generating circuit generates the second reference signal 27 is used. The modulation and the apparatus voltage to the electronic device 100 is connected to the circuit 21 generating circuit 22, receiving the device ground GND and the ground signal of the second reference voltage generating circuit 22 generates a signal, corresponding to said modulation generation signal MGND. To distinguish the signal ground GND, the modulation signal is denoted MGND.

In the present embodiment, the drive circuit 20 by providing a portion of said modulation signal to the driving circuit MGND to 20, to achieve synchronous modulation signal all the touch display panel 10. That is, as long as this part of the signal ground MGND modulated signal, the touch panel 10 to display all signals are synchronized by said modulated signal changes after MGND modulation.

Define a modulation signal is applied in the first period is MGND W1 of modulation, the signal to distinguish a ground GND is applied to the device. Accordingly, in the first period W1, the electronic device 100 is a voltage reference for the two reference fields. Two domains are shown as 80 and domain modulated signal as a reference domain MGND ground GND as a reference signal 90. Wherein, in reference to a ground signal GND is a ground terminal of the circuit 80 for loading domain signal ground GND, the ground MGND modulated signal as a reference circuit 90 in the domain for loading MGND modulated signal. Further, for the modulation for the circuit, which reference-earth potential is modulated to a modulated signal MGND loaded; circuit for the device for which the reference ground potential to the ground signaling equipment loaded GND.

That is, in the first period W1, the signal modulated by the ground GND is modulated MGND modulated signal, the modulated signal modulated MGND all loaded reference signal of the reference signal are modulated MGND modulated.

In contrast, in the second period W2 of, the electronic device 100 is a field for the reference voltage reference, are ground reference signal GND reference voltage. The circuit of the electronic apparatus ground 100 are connected to the device, receives a ground signal GND. That is, W2 of the second period, the modulation becomes an apparatus corresponds to, for transmitting a modulated signal rather than the ground signal GND MGND.

Previously noted, in the present embodiment, the first period W1, the common voltage generating circuit 22, the touch driving circuit 23, a data selector 24, and a control circuit 25 positioned in the circuit domain 90, the modulation circuit 21 and a voltage generating circuit 27 is located in the domain 80. The part of the signal processing circuit 26 located in the region 80, a portion 90 located in the domain.

The modulation circuit 21 includes a modulation terminal M. The modulation circuit 21 to the respective fields 90 through the modulation of the modulated signal output terminal M MGND circuit ground, so that, as the modulated signal MGND MGND circuit outputs a modulated signal with reference to a voltage reference domain 90 the modulated signal to the touch panel display 10. Wherein said modulation modulation terminal M is connected to, or as an end of the modulation. Further, the signal displayed on the touch panel 10 in a floating state, for example, element (e.g., described later performs image display of the pixel electrode 103 has, see FIG. 7) as a result of capacitive coupling of the modulated signal is superimposed MGND. Thus, in the first period W1, the electrical signals on all the touch display panel 10 both become signals modulated by the modulation signal MGND.

In the field of circuit 90, for example, the common voltage generating circuit 22, the touch driving circuit 23, a data selection circuit 24, control circuit 25, the portion of the circuit of the signal processing circuit 26, includes a ground terminal when the terminal, the ground terminal It can be directly connected to the modulation.

W2 of the second period, the modulating circuit 21, the common voltage generating circuit 22, the touch driving circuit 23, a data selection circuit 24, control circuit 25, the signal processing circuit 26, a voltage generating circuit 27 are based on a ground signal GND reference voltage benchmark.

Accordingly, in the first period W1, the modulating circuit 21 generates a drive signal generating circuit 27 corresponding to the modulation signal in accordance with signal ground GND MGND equipment from the voltage and ground, and providing the modulated signal to the MGND modulation ground. Generating the common voltage generating circuit 22 corresponding to the first common voltage Vc1, and performs an image corresponding to the common electrode 101 is supplied to the selecting circuit 24 through the data. The touch drive circuit 23 corresponding to generate the first common voltage Vc1, and the selection circuit 24 to a corresponding common electrode 101 and performs image display by the self-capacitance of the touch sensing data. The signal processing circuit 26 receives a touch of the touch sensing signal outputted from the drive circuit 23, to obtain touch information. That is, the touch drive circuit 23 outputs to the first common voltage Vc1 while the common electrode 101 serves as a display drive signal to the touch drive signal, the common voltage generating circuit 22 is output to the first common voltage of the common electrode 101 only Vc1 for display drive signal.

The touch drive circuit 23 generates an output circuit 22 to the plurality of first common voltage Vc1 common electrode 101 are the same signal after MGND modulating said modulation signal, and the touch drive circuit 23 can further transmit the common voltage the touch sensing signal from the common electrode 101 to the sensed signal processing circuit 26, to obtain the touch information, and therefore, the driver circuit 20 drives the touch panel 10 can be performed simultaneously with the image display from the capacitive touch sensing.

Since the touch drive circuit 23 is supplied to the common electrode 101 serves as both the first common voltage Vc1 touch drive signal, and as a display drive signal, thus performing image generation circuit 22 drives the portion of the common electrode 101 in the common voltage display when the touch drive circuit 23 may drive the common electrode 101 with the rest of the image display and perform self-capacitance touch sensing. Accordingly, the present invention is a touch display device 1 in the course of performing any image display, a touch sensing may be simultaneously performed, and no interference between the image display and the touch sensing or less interference caused to the image display.

Further, in the second period W2 of, the common voltage generating circuit 22 through the data selector circuit 24 to the second common voltage Vc2 of the plurality of common electrodes 101 performs image display.

Preferably, in the second period W2, 25 controlling the data selection circuit 24 by the control circuit, the plurality of second common voltage Vc2 on the common electrode 101 are derived from the common voltage generating circuit 22. The touch drive circuit 23 further outputs a second example, a common voltage Vc2 to the data selection circuit 24, the data selecting circuit 24 selects an output from the second common voltage generating circuit 22 of the common voltage Vc2 to the common electrode 101, thereby making the touch display apparatus 1 performs image display in the second period W2 instead of performing touch sensing.

W2 alternately through the first period and the second period W1, the touch display apparatus 1 of the image display and touch sensing.

In the process of displaying an image, the touch display apparatus 1 may include a first period W1, a plurality of the first period W1, a portion of the first period W1 is a period of the first period W1 W1 and first portion , or a plurality of the first period and the first period W1 W1 portion.

The touch drive circuit 23 and the common voltage generating circuit 22 a different circuit configuration, whereby, even if the touch drive circuit 23 and the common voltage generating circuit 22 provides the same signal to the common electrode 101, however, the the common electrode 101 is connected to the touch drive circuit 23 may further be used as touch sensing electrodes.

The touch drive circuit 23 further receives a touch sensing signal output from the common electrode 101, and acquires touch information according to a touch sensing signal.

Specifically, the touch driving circuit 23 is electrically connected to the common electrode 101 may be responsive to a target object (e.g., a suitable object such as a finger) or a proximity touch or not, correspond to different touch sensing output signal to the touch sensing drive circuit 23, respectively, the touch drive circuit 23 may obtain touch information according to a touch sensing signal.

In contrast, the common voltage generating circuit 22 does not receive a signal from the common electrode 101, or, even if the received signal from the common electrode 101, but the structure itself generating circuit 22 based on a common circuit voltage, regardless of whether the upper electrode 101 with a common touch or proximity of the target object, a signal generating circuit 101 outputs the common electrode 22 is electrically connected to the common voltage substantially constant, and thus can not obtain touch information.

Preferably, the common voltage generating circuit 22 and the touch drive circuit 23 sharing the same signal source 221, the signal source 221 by the modulated signal modulated MGND, the corresponding reference voltage to generate a first signal. The common voltage generating circuit 22 and the touch drive circuit 23 to the plurality of common electrodes 101, which electrically generating circuit 22 according to the same common voltage to the first reference voltage corresponding to the output signal of the first common voltage Vc1 performing image display connected to the common electrode 101, rather than simultaneously performing touch sensing, the touch drive circuit 23 is electrically connected with the common electrode 101 simultaneously performs image display and self-capacitance touch sensing.

Since the touch drive circuit 23 generates the same signal generating circuit 22 to the common electrode 101 and the common voltage, thus, the touch drive circuit 23 while performing a self-capacitance touch sensing electrode common driver 101 does not affect the implementation of perform normal image 101 from the common electrode of the capacitive touch sensing display. Further, since the common voltage generating circuit 22 and the touch drive circuit 23 sharing the same signal source 221, therefore, the common voltage generating circuit 22 and the driving circuit 23 outputs the touch signal to the plurality of common electrode 101 You can achieve the same or substantially the same, so as to ensure the quality of the touch sensing with the image display.

In some embodiments, the common voltage generating e.g. 22, follower 222, and the voltage regulator circuit 221 includes a signal source circuit 223. The signal source is connected to the 221,222 follower, the follower 222 is further connected to selection circuit 24 with the data. One end of the voltage stabilizing circuit 223 is connected to the follower 222 and the data selector 24 between the other end connected to said modulation circuit.

The signal source 221 comprises a ground terminal and the output terminal b. Said ground terminal is connected to a ground of the modulation. The output terminal b of the follower 222 is connected. The signal source 221, for example, a direct current source, however, do not limit this invention, the signal source 221 may be other suitable circuit configuration.

The follower 222 to transmit the signal source 221 outputs a signal to the data selection circuit 24, and through the data selecting circuit 24 is supplied to a respective common electrode 101 performs image display. The follower 222, for example, a first amplifier, however, the present invention is not limited thereto, the follower 222 may be other suitable circuit configuration is not limited to the first amplifier. In the specific embodiment, the follower 222 to the first amplifier will be described as an example. The first amplifier 222 includes a third supply terminal c1, the third ground terminal d1, a first inverting terminal e1, a first inverting terminal f1, and a first output terminal g1. Wherein said third power supply voltage terminal c1 for loading VDD1. The third ground terminal d1 is connected to the modulator. The first end e1 in phase with the signal source 221 to the output terminal b is connected. End of the first inverter and the first output terminal f1 g1 short. G1 the first output terminal of the data selector circuit 24 is connected.

The regulator circuit 223 is connected between the first output terminal g1 of the modulation, the means for selecting between the voltage regulator circuit 24 with the data 222 of the follower. In the present embodiment, for example, the voltage regulator circuit 223 comprises a voltage stabilizing capacitor Cw. The stabilizing capacitance Cw is connected between the first output terminal of the modulation ground g1.

In operation, the first period W1, the third ground terminal and a ground terminal for receiving the modulated signals are d1 line MGND, corresponding to the signal source 221 through the output terminal b to output the signal to the first reference voltage said first amplifier 222, the first amplifier 222 is imaginary short status, then the corresponding outputs the same first common voltage Vc1 of the first reference voltage signal to the data selection circuit 24, selection circuit 24 through the data to the corresponding common electrode 101 performs image display.

In the second period W2 of the ground terminal and a ground terminal of the third receive a ground signal d1 are the GND, corresponding to the signal source 221 through the output terminal b outputs a second reference voltage signal to the first amplifier, a second 222 an amplifier in an imaginary short state 222, corresponding to the transmission and the second reference voltage signal identical to the second common voltage Vc2 to the data selection circuit 24, and through the data selecting circuit 24 is supplied to the plurality of common electrodes 101 to perform image display.

The touch drive circuit 23, for example, the signal source comprises a plurality of operational amplifiers 221 and 231. Each operational amplifier 231 includes an amplifier 232 and a second feedback branch 233. The second amplifier 232 includes a fourth power supply terminal c2, fourth ground terminal d2, the second phase side e2, a second inverting terminal f2, and a second output terminal g2. Wherein said fourth power supply terminal for loading c2 voltage VDD2. The fourth ground terminal d2 is connected to the modulator. The second end e2-phase with the signal source 221 to the output terminal b is connected. Said second f2 inverting terminal of the data selector circuit 24 is connected, and further through said feedback branch 233 is connected to the second output terminal g2. The second output terminal g2 is further connected to the signal processing circuit 26.

The feedback branch comprises a feedback capacitor 233, for example, a reset switch 233a and 233b. Preferably, the feedback capacitor 233a is connected to and between the reset terminal of the second inverter and the second output terminal f2 g2 switch 233b connected in parallel.

In operation, the first period W1, the fourth ground terminal receiving a modulated signal d2 MGND. The second amplifier is in an imaginary short state 232, receiving the first reference voltage signal from the signal source 221, and common voltage Vc1 corresponding to a first output to said data selection circuit 24, by the data selection circuit 24 is supplied to the respective common electrode 101. The touch sensing signal of the feedback branch 233 for sensing the transmission of the common electrode 101 to the sensed signal processing circuit 26.

Since the touch sensing signal will also be modulated by the modulation signal MGND, when the signal processing circuit 26 of the touch sensing signal analysis and calculation can modulate the reverse touch sensing signal according to need, for touch coordinate information.

The number of the plurality of operational amplifiers 231, for example, the same number of columns of the plurality of common electrode 101. Each of the operational amplifier 231 via the data selecting circuit 24 selectively connected to the corresponding common electrode 101 a. However, the number of the plurality of operational amplifiers 231 may also be the same as the number of rows of the plurality of common electrode 101. Further, the present invention is not limited thereto, e.g., each column of common electrodes 101 can be connected to two corresponding selection of the operational amplifier 231 and other embodiments are also possible.

The touch driving circuit 23 of the present invention to provide a touch driving signal generates the same circuit 22 generates a first common voltage Vc1 to the common electrode 101 and the common voltage to the touch drive signal may drive both the common electrode 101 and performs image display is performed from capacitive touch sensing, thus, the touch of the display device 1, a plurality of common electrodes 101 while performing image display, and may further perform a touch sensing.

Further, compared to the touch drive circuit 23 and the common voltage generating circuit 22, respectively, each with a signal source, since the application of the present touch drive circuit 23 and the common voltage generating circuit 22 share the same signal source 221 Therefore, the touch drive circuit 23 and the common voltage generating circuit 22 by the selecting circuit 24 outputs the data to the plurality of first common voltage Vc1 common electrode 101 may be the same or tend to achieve the same, so as to ensure the touch display apparatus 1 image display quality of the touch sensing.

However, changes in some embodiments, also be selected with the touch drive circuit 23 is a circuit configuration of the common voltage generating circuit 22, respectively, with a respective signal source.

W2 of the second period, the modulation becomes an apparatus, the signal source 221 outputs a second signal to a reference voltage follower 222 and the plurality of operational amplifiers 231, the control circuit 25 controls the data selecting circuit 24 selects the second common voltage Vc2 output from the voltage generating circuit 22 is common to the plurality of common electrodes 101 performs image display.

Further, in some embodiments change, the signal may be provided between the source follower 221 and a first switch 222 (not shown), a second switch provided between the signal source 221 and the operational amplifier 231 (not shown in FIG. ), correspondingly, in the first period W1, the first and second switches are in a closed state, W2 of the second period, the first switch is closed, the second switch is in an open state may also be possible.

The data selection circuit 24 comprises, for example, a first data selector 241 and a plurality of second data selector 242. The follower 222 and the first data selector 241 is connected to the first data selector 241 is connected to the plurality of common electrodes 101, respectively. Each of the operational amplifier 231 are connected to a second data selector 242, each of the second data selector 242 are respectively connected to a common electrode 101. The first data selector 241 and the plurality of second data selector 242 are respectively connected to the control circuit 25. The control signal output timing of the first data selector 241 and the plurality of second data selector 242 to the control circuit 25.

For example, the plurality of common electrode 101 as a 26 row 40 are arranged in matrix, corresponding to the number of said plurality of operational amplifier 231 is 40, the number of the second data selector 242 is 40 . A first data selector 241 includes a first output port O1, an output signal from the common voltage generation circuit 22 corresponding to the common electrode 101. The number of the first output port O1 to the number of rows of said plurality of common electrodes 101 are the same, namely 26. Each of the second data selector 242 includes a second output port O2, a signal output from the touch drive circuit 23 corresponding to the common electrode 101. The number of the second output port O2 to the number of rows of said plurality of common electrodes 101 are the same, namely 26. Incidentally, in FIG. 2, limited to the illustrated size, in fact, shows only part of the circuit configuration, for example, shows only two operational amplifiers 231,2 second data selector 242, and a portion of the common electrode 101 .

In the present embodiment, each of the second data selector the second output port O2 242 are connected to a common electrode 101. Each of the first output port O1 are connected to the respective second data selector O2 between a second output port 242 and the common electrode 101, thereby saving the number of the connection line L, the connection between each other different from the first output port O1 different second output port O2.

However, the change, in other embodiments, the number of the first data selector 241 may also be a plurality, it is not limited to one, respectively, of the first plurality of the first data selector 241 connection relationship between the plurality of output ports O1 and the second output port of the second data selector 242 may correspond to the O2 adjusted, for example, each of the data selector 241 and a first portion of the second data selector 242 is connected, However, it may be, each of the first data selector of the first output port O1 241 and the plurality of second data selector portion 242 is connected to the second output port O2, and the like.

In the first period W1, the plurality of second data selector 242 under control of the control circuit 25 of the data selector 26 is selected from 1, and accordingly, each second data selector 242 each time the output from the touch drive circuit 23 of the first common voltage Vc1 to a common electrode 101, by 26, the plurality of second data selector 242 to drive all of executing the common electrode 101 sensing a touch. The first data selector 241 under control of control circuit 25 is selected from the data selector 25 is 26, when the output 242 of the second plurality of data selectors first common electrode 101 to the common voltage Vc1 when the same row, the first data selector 241 output from the common voltage generating circuit 22, a first common voltage Vc1 to the rest of the common electrode 101 of each row. Incidentally, the touch drive 26 may be done in one or more W1 of the first period.

W2 of the second period, the first data selector 241 under control of the control circuit 25 becomes the data selector 26 is selected from 26, an output from the common voltage generating circuit 22 a second voltage Vc2 common to all the common electrodes 101. The second data selector 242 stops, for example, an output signal to the common electrode 101 under the control of the control circuit 25.

Touch the touch display apparatus 1 of the drive circuit 23 and a common voltage generating circuit 22 is not limited to the above-described circuit configuration, it may be other suitable circuit configuration. For example, the data selection circuit 24 is not limited to the first and the second data selector 241 data selector 242, may be other suitable switching circuit configuration.

By said data selection circuit 24, one can reduce L with the plurality of connection lines between the common electrode driving circuit 101 number 20, on the one hand can reach the image displayed on the execution of said plurality of common electrode 101 of the driving Meanwhile, time division driving the common electrodes 101 performs touch sensing.

As described above, the touch display apparatus 1 may display an image of the touch sensing of an ongoing, e.g., in time, the common voltage generating circuit 22 and the touch drive circuit 23 are continuously provided to the first a common voltage Vc1 to the common electrode 101, in space, the common voltage generating circuit and the touch drive circuit 23 drives the plurality of common electrodes cooperating 10,122. In other words, no W2 of the second period, the control circuit 25 controls corresponding to the first data selector 241 always maintain the 26 selected from 25, controlling the plurality of second data selector 242 always maintain the 26-to-1.

Also for example, may be selected only touch drive circuit 23 continuously drives the plurality of common electrodes 101 simultaneously performs image display and touch sensing, the common voltage generating circuit 22 is omitted.

Further, when the plurality of common electrode 101 form other regular or non-regular manner when the arrangement, the data selection circuit 24, the common voltage generating circuit 22, and the touch of the plurality of common electrode driving circuit 23 the relationship between the 101 to do the appropriate adjustments for those of ordinary skill in the art, according to the technical content disclosed above, can be reasonably inferred information corresponding circuit, therefore, it will not be repeated here.

Further, in some embodiments, for example, the drive circuit 20 may further include a driving circuit fingerprint, the fingerprint of the driver circuit is selectively connected to the plurality of common electrodes 101, the driving circuit 20 when the drive portion of the common electrode 101 At the same time performing image display and touch sensing, the fingerprint can also drive a driving circuit portion of the common electrode 101 while performing image display fingerprint sensing, the common driving voltage generating circuit 22 performs image display portion of the common electrode. Accordingly, the present application, driving the common electrode 101 is not limited to the working voltage generating circuit 22 and the common touch drive circuit 23 may further include other suitable types of suitable functional or circuitry driving the common electrode 101 corresponding to perform the corresponding function.

Referring to FIG. 3 and FIG. 4, FIG. 4 is a schematic circuit configuration of an embodiment of the modulation circuit 21. The modulation circuit 21 includes a first active switch 211, the second active switch 213, and a control unit 215. Wherein the first active switch 211 includes a control terminal K1, a first transmission terminal Tl, and a second transmission terminal T2, the second active switch K2 213 includes a control terminal, a first transmitting terminal T3, and a second transmission terminal T4. Said control terminal K1, K2 are connected to the control unit 215. A second transmission terminal T2 of the first active switch 211 and the first transmission terminal T3 of the second active switch 213 is connected to the connecting line and define an output node N, the first transmission of a first active switch terminal T1 211 receiving a first reference signal, the second transmission terminal T4 of the second active switch 213 receives the second reference signal, the control unit 215 by controlling the first and second active switches 211, 213 controls the output to a corresponding node N are alternately output the first reference signal and the second reference signal to form a modulated signal MGND.

In the present embodiment, the first reference signal to the GND ground signal, the second reference signal for the drive signal. Accordingly, the second transmitting terminal T4 and the voltage generating circuit 27 is connected to the first terminal T1 is connected to the transmission device, the means for receiving the GND signal ground, the output node of said modulation signal for MGND N to be modulated.

As the first active switch 213 is a thin film transistor, transistor, metal oxide semiconductor field effect transistor 211 and other suitable type of switch and the second active switch.

The modulation circuit 21 works as follows: in a first period W1, the control unit 215 for controlling the modulating circuit 21 outputs modulated signal 90 MGND to a domain, the domain in the case 90 for the modulation ; W2 of the second period, the control unit 215 for controlling the modulating circuit 21 outputs a ground signal GND to the modulation, at this time becomes the same as the modulation apparatus manner.

It is further noted that, in the first period W1, the electronic device 100 to a ground GND as a reference signal 80 and a reference domain modulated signal as a reference MGND reference domain 90, the touch display apparatus 1, since the said touch drive circuit 23 supplies an excitation signal to the common electrode 101 at the same time, a further touch sensing signal of the common electrode 101 receives the output itself, to acquire touch information, therefore, the touch display driving circuit 23 driving the touch when measuring principle of the touch panel 10 to perform a sense of self-capacitance touch sensing principle.

When using the electronic device 100 to the GND reference MGND two domains 80, 90, not only the touch panel 10 is a display signal synchronous modulation such that the overall signal to noise ratio is improved, and the touch drive circuit 23 in the domain 90 accordingly, some of the circuit configuration will be simplified, and thus the circuit structure can be simplified, production cost savings. For example, touch drive signal source circuit 23 is a conventional touch drive 221 and signal source circuit 221a (see FIG. 5 below) as an example.

Referring to FIG. 5 and FIG. 6, FIG. 5 is a schematic circuit configuration of a conventional signal source driving circuit 221a of the touch. FIG 6 is a schematic circuit configuration of the signal source circuit 221 of touch drive 23. It should be noted in advance that a conventional touch drive circuit is in operation, the signal source 221a is a ground reference signal GND reference voltage. Touch drive circuit 23 of the present application work, the signal source 221 is modulated reference signal MGND reference voltage. Signal source 221a includes a current source Ia, the resistance Ra, a first switch K1a, a second switch K2a. Wherein the current source Ia and the resistor Ra are connected in series between the power source terminal P1 and the device ground GND. K1a end of the first switch is connected between the current source Ia and the resistor Ra, and the other end connected to the touch driving circuit noninverting terminal h. K2a end of the second switch is connected to the first switching phase between the end of the same K1a h, and the other end connected to a ground signal GND is used to load the device. By controlling the first switch K1a and K2a of the second switch alternately conducting, generating the corresponding drive signal to the touch sensing inverting terminal h. Wherein the power terminal P1 with respect to the device ground GND is kept constant.

Correspondingly, the signal source includes a current source 221 and resistor Rb Ib, Ib of the current source and the resistor Rb is connected in series between a power supply terminal P2 and ground loading MGND modulated signal. Receiving end of the touch drive circuit 23, i.e., the second end of the G2 phase with, the current source connected between Ib and the resistor Rb. Since the modulating signal is varied MGND, therefore, the output voltage between the power supply terminal P2, the resistor Rb and the current source Ib are modulated varies with the variation of the modulation signal MGND earth, thereby generating a corresponding touch sensing driving second in-phase signal to the end of g2. Further, the capacitance may be increased such as modulation between the power supply terminal P2, to maintain the stability of the signal.

221a compared to the signal source, the signal source 221 of the circuit configuration becomes simple, and touch sensing driving signal source 221 produced as compared to driving a touch sensing signal generated by the source 221a to be stabilized.

Referring to FIG 2, FIG 3, and FIG. 7, FIG. 7 is a schematic circuit configuration of a particular embodiment of the electronic device 100 is. As described above, in this embodiment, the touch display apparatus 1 is a liquid crystal display device as an example. However, can be changed, when the display apparatus 1 is a device of another type of the touch display, the touch display apparatus 1 is a circuit configuration may correspond to all the different, additional, different circuit configuration of the liquid crystal display device may vary, However, those of ordinary skill in the art may easily derive the corresponding structure that the scope of the present application are intended to fall. In the present embodiment, the touch display touch panel display apparatus 1 10 includes a plurality of pixels 11. Each pixel 11 driven by the drive circuit 20 for performing image display and touch sensing. Each pixel 11 includes the common electrode 101, the pixel electrode 103, and the switch unit 104. In the present embodiment, the switch unit 104 includes a control switch 105. The control switch 105 includes a control electrode G, the first transfer electrode S, and the second transfer electrodes D. The control electrode G and the first transfer electrode S and the driving circuit 20 is connected. The second transfer electrodes D connected to the pixel electrode 103. The driving circuit 20 for driving the control switch 105 is turned on and off. In the present embodiment, the switch unit 104 includes a control switch 105, however, in other embodiments, the switch unit 104 may also control switch 105 includes two or more control switches, however, may further comprise other circuit elements, such as a storage circuit. The second control switch 105 is connected in series.

The control switch 105, for example, a thin film transistor switches. The thin-film transistor switch, for example a low temperature polysilicon thin film transistor switch, an amorphous silicon thin film transistor switches, indium gallium zinc oxide (IGZO) thin film transistor switches, high-temperature polysilicon thin film transistor switch or the like. However, the present invention is not limited thereto, the control switch 105 may be other suitable types of switches. When the control switch 105 to switch the thin film transistor, the control electrode G of the thin film transistor switches a gate, the first transfer electrode a thin film transistor switch S is the source of the second transfer electrode is the drain D of the thin film transistor switch.

In the present embodiment, each pixel 11 includes a pixel electrode 103, respectively, and a control switch 105. Since the size of the common electrode 101 is generally large size of the pixel electrode 103 are, respectively, a plurality of pixels 11 share the same common electrode 101. However, in other embodiments the change, but also for each pixel 11 includes a common electrode 101, respectively.

In the first period W1, the drive circuit 20 is turned on by the scan signal Vg1 to provide a first control switch 105, the drive control switch 105 is turned on, and provides a first voltage Vd1 to the pixel gray scale by controlling the switch 105 is turned on electrode 103, a first common voltage Vc1 to the common electrode 101 to drive the pixels 11 perform image display refresh. Wherein the first scan signal Vgl opening, said first gray scale voltage Vd1, signal after synchronous modulation of said modulated signal MGND the first common voltage Vc1 are.

Typically, the drive circuit 20 drives the plurality of rows of pixels 11 perform image display refresh. In the first period W1, when the drive circuit 20 drives a row of pixels 11 perform image display refresh, the drive circuit 20 is turned off by providing a first scan signal Vg2 to the rest of the pixel rows of the control switch 11 105, such that the remaining rows of pixels 105 of the control switch 11 is turned off, so that the remaining rows of pixels 11 in the image display state maintained. Wherein the first scan signal Vg2 off through said modulated signal is modulated signal MGND.

Generally, the embodiment 11 has a plurality of pixel rows and columns arrangement. However, a plurality of pixels 11 may form other regular or irregular manner arranged.

To avoid pixel touch sensing display refresh the image interference, preferably, the drive circuit 20 simultaneously perform a touch sensing driver 11 performs image display and does not overlap 11 between pixel refresh, e.g., image display refresh interval between the pixel electrode 101 and the common touch sensing point execution 11 performs predetermined image display pixel rows 11 held. Pixels 11 and pixel refresh image display is performed by software or hardware or controlled to achieve touch sensing may be performed to maintain a predetermined distance between 11 without overlap.

However, the change, in other embodiments, the image display is refreshed pixel 11 driven by the driving circuit 20 may also be selected while performing touch sensing, or, while performing image display pixels 11 and the refresh execution touch sensing pixels may also be selected between 11 partially overlap, partially overlap, for example, completely or partially share a common electrode 101 between pixels 11.

In contrast, in the second period W2 of, for example, the drive circuit 20 to provide a second scanning signal Vg3 to open the control switch 105, the control switch 105 activation, and providing a second gray scale voltage Vd2 by activating the control switch 105 to the pixel electrode 103 , providing a second common voltage Vc2 to the common electrode 101 performs image display refresh. When the drive circuit 20 drives a row of pixels 11 perform image display refresh, providing a second scanning Vg4 off signal to the remaining rows of pixels 11 of the control switch 105 is turned off, so that the pixels of the remaining rows 11 hold state in image display.

Opening the first scan signal Vg1 through Vg3 e.g. on signal of the modulated signal is modulated signal MGND the second scan. Vg2 off the first scan signal scan, for example, the second cut-off signal of the modulated signal Vg4 via MGND modulated signal.

The first gray scale voltage Vd1 corresponding gray scale voltage Vd2 of the second modulated signal by said modulated signal MGND. For example, when the gray scale voltage Vd1 is a first gray scale voltage Vd2 of the second modulated signal by said modulated signal MGND, the pressure difference between the second gray scale voltage Vd2 and the second common voltage Vc2 equal to the first pressure difference between the gray scale voltage Vd1 of the first common voltage Vc1.

For each of the 11 pixels: the first pixel electrode 103 and the differential pressure between the common electrode 101 determines the display 11 gray levels of each pixel. Liquid crystal display devices, the liquid crystal molecules is not to be polarized for the same display gray levels, the gray scale voltage can be divided into positive and negative polarity gray scale voltage gray scale voltage.

The touch panel display 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 crossing and insulated example arrangement. The plurality of scanning lines 281 extending in the X direction, for example, are arranged in the Y direction. The plurality of data lines 291 extending in the Y direction, for example, are arranged in the X direction. Each row of the scanning lines 281 are respectively connected to the pixel control switch 11 is controlled electrode 105 G. Each data line 291 are connected to a pixel control switch 11 of the first transfer electrode S.

The plurality of scan lines 281 for transmission from the first scan driving circuit 20 on signal Vg1, the second scan on signal Vg3, off the first scan signal Vg2, the second scan or off signal to the control switch 105 Vg4 a control electrode G. The plurality of data lines 291 for transmitting drive from the first gray scale voltage Vd1 circuit 20 or the second gray scale voltage Vd2 to the control electrode of the first transfer switch 105 S.

The driving circuit 20 further includes a display driving circuit 20a, for driving the touch panel 10 performs image display. The display driving circuit 20a includes a scan driving circuit 28, the scanning signal generating circuit 28a, 29, and the common voltage generating circuit 22, the data driving circuit. The scan driving circuit 28 is connected to the plurality of scan line 281. The data driving circuit 29 is connected to the plurality of data lines 291. The scan driving circuit 28 and the data driving circuit 29 are connected to the control circuit 25. The control circuit 25 is further configured to scan the scan driving timing control circuit 28, and the provision of display data to the data driving circuit 29. The scanning signal generating circuit 28a and the scan driving circuit 28 is connected. The scanning signal generating circuit 28a for generating the first scan-on signal Vg1, the second scan on signal Vg3, off the first scan signal Vg2, or the second scan signal is turned off Vg4, and providing the first scan-on signal Vg1, the second scan on signal Vg3, off the first scan signal Vg2, Vg4 off signal or the second scan to the scan driving circuit 28. The scan driving circuit 28 includes, for example a circuit configuration of the shift register receives the scan signal from the scan-on signal generating circuit 28a and the scanning signal is turned off, and correspondingly under the control of a scan control circuit 25 is turned OFF signal and a scan signal to the corresponding the scan line 281.

In the present embodiment, during operation, the first period W1, the scanning signal generating circuit 28a, a scan driving circuit 28 and the data driving circuit 29 is also located in the field 90. The modulated output signal of the first scan of the scanning signal generating circuit 28a is modulated by the modulating circuit 21 MGND on signal Vgl, Vg2 off signal of the first scan to the scan drive circuit 28, the scan driving circuit 28 corresponds to the control of the timing control circuit 25 outputs the first scan-on signal Vgl, Vg2 of the respective first scan signal is turned off to the corresponding scan line 281, the data driving circuit 29 is modulated by the modulating circuit 21 MGND modulated signal, outputting the first gray scale voltage Vd1 to the plurality of data lines 291, to provide the control switch 105 by activating a corresponding pixel electrode 103 to perform image display refresh. The common voltage generating circuit 22 and the touch driving circuit 23 selects the circuit 24 provides a first plurality of common voltage Vc1 to the electrodes 101 through the common data.

Further, in the signal on the image display pixels of the pixel electrode 103 is held by the capacitive coupling 11 is changed by said modulation signal MGND modulated signal. Thus, the touch signal is displayed on the pixel electrode 103 of each pixel 11 of the panel 10 and the common electrode 101 becomes the average signal after synchronous modulation of said modulated signal MGND. Thus, the drive circuit 20 drives the touch panel 10 to perform any process in a normal image display, can be performed while driving the common electrode 101 of the touch sensing.

For example, when the scan driving circuit 28 provides a first scan signal Vg1 to turn on a scan line 281, the common voltage generating circuit 22 performs a first common voltage Vc1 to the image display portion of the common electrode 101, the touch drive circuit 23 provides a first common voltage Vc1 to the rest of the common electrode 101 and the image display is performed from the capacitive touch sensing.

Compared to the conventional multiplexing Incell type display device performs a touch sensing common electrode touch, the touch display apparatus 1 of the present application by using the modulation signal MGND synchronous modulation signals of all the touch display panel 10, so that for driving the common electrode 101 performs image display signal may further be used as the touch drive signal, the drive circuit 20 provides a first scan signal Vg1 to turn on when the scanning line 281, may be performed similarly to the common electrode 101 from the capacitive touch sensing measuring, respectively, the touch display apparatus 1 is not necessarily limited to the line gap I, space-frame to drive the common electrode 101 performs touch sensing, thereby, the time for performing the touch sensing display device and improve the resolution does not exist technical problems enough. Further, the touch display apparatus 1 performs the process at any touch sensing display image, the display image no effect on normal or less affected.

Incidentally, the driving circuit 20 outputs to the plurality of first common voltage Vc1 common electrode 101 are the same, and the first common voltage Vc1 compared to the signal ground GND of the signal change, so that, the first common voltage Vc1 can be used as a touch driving further signals, respectively, the drive circuit 20 while driving the common electrode 101 performs a normal image display, and further the common electrode drive 101 performs a self-capacitance touch sensing.

Further, in the second period W2 of the scanning signal generating circuit 28a outputs the second scan on signal Vg3, Vg4 off signal of the second scan to the scan drive circuit 28, the scan driving circuit 28 in the control circuit 25 under the control of a corresponding output on signal Vg3 second scan, the second scan signal is turned off to Vg4 respectively corresponding scan line 281, the data driving circuit 29 outputs the gray scale voltage Vd2 to the second plurality of data lines 291 , to be supplied to the respective pixel electrodes 103 by activating the control switch 105. The common voltage generating circuit 22 to the second common voltage Vc2 of the plurality of common electrodes 101. Accordingly, the driving of the touch display panel 10 performs image display.

Liquid crystal display devices, the second common voltage Vc2 is generally selected relative to the signal ground GND of the constant voltage signal is a constant, for example (-1) V. Signal in a first period W1, the signal is modulated periodically varying MGND example, the frequency of 200KHZ for example, an amplitude of 1.8V, i.e. a first reference modulation signal MGND the signal is 0V, the second reference signal is 1.8V. Correspondingly, the first common voltage Vc1 (-1) V voltage signal 0.8V and the voltage signal output from the signal alternately.

Incidentally, in FIG. 7, only shows the modulation circuit 21 outputs a modulation signal MGND to the touch drive circuit 23 are omitted 90 in other circuits has a ground terminal of the modulation circuit 21 outputs a modulation signal MGND to the domain, such as a common voltage generating circuit 22, the scanning signal generating circuit 28a and the like, however, those skilled in the art from the foregoing description can clearly know the modulation circuit 21 is to output a modulation signal 90 in other circuits MGND having a ground terminal domain.

In certain embodiments, the drive circuit 20 may not be driven all the common electrodes 101 are the implementation of a self-capacitance touch sensing.

Referring to FIG. 8 and FIG. 9, FIG. 8 is an exploded schematic view of one embodiment of the touch panel 10 shown in FIG. 7 is displayed. FIG 9 is a schematic cross-sectional structure of the display 10 is a touch panel 8 shown in FIG. The touch panel display 10 includes a first substrate 106, a second substrate 107, a display medium layer 108. The display medium layer 108 in this embodiment is a liquid crystal layer, however, can be changed, in other embodiments, the display may correspond to other media. The plurality of pixel electrodes 103 and the control switch 11 of the pixel 105, the plurality of scan lines 281, and the plurality of data lines 291 are disposed on the second substrate 107. The display medium layer 108 and the plurality of common electrodes 101 disposed between the first substrate 106 and the second substrate 107.

The first substrate 106 and the second substrate 107 is a transparent insulating substrate, for example. The transparent insulating substrate, for example, a glass substrate, a film substrate or the like.

The second substrate 107, and a pixel electrode disposed on the second substrate 107 is 103, the control switch 105, the plurality of scan lines 281 and the plurality of data lines 291 are typically referred to as an array (the Array) substrate . In contrast, the color filter is provided (not shown), to realize a color image displayed on the first substrate 106. The first substrate 106 and a color filter is generally referred to as a color filter (Color Filter, CF) substrate. 106 facing away from the first substrate side of the second substrate 107 for displaying an image and receiving a touch sensing. However, to be changed, the color filter may be disposed on the second substrate 107. In some types of display device, the color filter may be omitted, alternatively, a light source of red, green and blue colors emit light. Further, for different types of display devices, a second substrate 107 opposite to a side of the first substrate 106 may also be used for image display and receive touch sensing. The touch panel display 10 and a touch or a double-sided display panel. The touch panel display of the present invention is to touch the display panel 10 is one-sided or double-sided touch panel do not particularly limited.

Preferably, the plurality of common electrodes 101 is disposed between the second medium layer 108 and the substrate 107 of the display. In the present embodiment, the plurality of common electrodes 108 and 101 positioned between the plurality of pixel electrodes 103 of the display medium layer. For example, the plurality of common electrodes 101 on the same layer, a plurality of pixel electrodes 103 on the same layer, two stacked. Further, since the touch display apparatus 1 is a liquid crystal display device as an example, and accordingly, the liquid crystal display device as a fringe field switching type (Fringe Field Switching, FFS) liquid crystal display device. Said plurality of common electrode 101 are respectively provided with a slit 101a. Thereby the pixel electrode 103 is formed between the fringe electric field. In this embodiment, a plurality of slits may not be provided on the pixel electrode 103, each of the electrodes is a single piece, however, can be changed, the plurality of pixel electrodes 103 may be provided with a slit, thereby increasing the edge Electric field strength.

Referring to FIG. 10 and FIG. 11, a cross-sectional schematic view of another embodiment of the panel 10 is a touch display embodiment 10 shown in FIG. 7 in FIG. As shown in FIG. 10 FIG. 11 is a touch panel display 10 is a schematic top view. A plurality of common electrodes 101 may be disposed between the pixel electrode 103 and the second substrate 107. A plurality of stacked between the common electrode 101 and the plurality of pixel electrodes 103. Slits 103a are respectively provided on the plurality of pixel electrodes 103, 101 to be formed between the common electrode fringe electric field. In this embodiment, a plurality of slits may not be provided on the common electrode 101, each of the electrodes is a single piece, however, may be changed, said plurality of common electrode 101 may be provided with a slit, thereby increasing the edge Electric field strength.

Further, changes, the touch panel display 10 may be a flat panel display conversion type (In-Plane Switching, IPS) liquid crystal, or the touch panel display 10 may also be twisted (Twisted Nematic nematic, TN) liquid crystal display panel or the touch panel 10 to display any other suitable type of display panel.

Please refer to FIG. 1 and FIG. 3, the electronic device 100 further comprises a control chip 3. The control chip 3 and the display device 1 is connected to the touch. The apparatus 1 for the control chip 3 performs data communication with the touch display. The control chip 3 is further configured to provide a supply voltage to the touch display device 1. The control chip 3 may be a single chip or a chipset. When the master chip 3 as a chipset, the chipset includes an application processor (Application Processor, AP) and a power chip. Further, the chipset may further comprise memory chip. Further, the application processor may also be a central processing unit (Central Processing Unit, CPU).

The control chip 3 includes a power supply terminal 31 and a ground terminal 33. The power supply terminal 31 is connected to a drive circuit 20 for driving the power supply circuit 20. The ground terminal 33 is connected to the device, the device receives a ground signal ground GND. In the second period the first period W1 and W2, the control chip 3 are based on the reference voltage is a ground reference signal GND.

The control chip 3, for example, display data and associated control signals to the display driving circuit 20a. The display driving circuit 20a according to a signal to the control chip 3 provided corresponding to drive the touch panel 10 performs display corresponding to image display. For example, the control chip 3 is further provided a power supply voltage signal (VDD1, VDD2) to the touch drive circuit 23 and a common voltage generating circuit 22 and other circuits. The touch touch drive circuit 23 a driving signal to the common electrode 101 performs touch sensing, the control chip 3 receives the output signal from the signal processing circuit 26, corresponding to the electronic control device 100 whether to execute the corresponding function. Further, the main control chip 3, for example 25, 25 is controlled by supplying a control signal to the control circuit by the control circuit of the data selection circuit 24, the timing control corresponds to the drive circuit 20 drives the common electrode 101 performs touch sensing.

Incidentally, in the first period W1, since the control chip 3 is located in the domain 80, the display driving circuit 20a, the touch driving circuit 23 and other circuits located in the region 90, therefore, is located in the domain master 80 chip 3 and the display driving circuit 90 is located in the region 20a, the signal transmission between the touch drive circuit 23 and other circuits, for example, via the level conversion processing required to meet the voltage requirements of electronic components. In contrast, in the second period W2 of, and the display control chip 3 For signal transmission between the driving circuit 20a, and the like touch drive circuit 23 via the level conversion processing circuit, the level conversion processing, if the level without going through conversion processing, the level conversion processing is not performed.

Referring to FIG. 3, FIG. 12 and FIG. 13, a block diagram of an embodiment of a signal processing circuit 326 shown in FIG. 12. 13 is a schematic view of the structure of a signal processing unit 12 the signal processing circuit shown in FIG. 26 according to an embodiment of 261. The signal processing circuit 26 comprises a plurality of signal processing unit 261. Corresponding to each signal processing unit 261 connected to an operational amplifier 231, for sensing signals outputted from the operational amplifier 231 performs calculation processing to obtain touch information.

The signal processing unit 261 includes an analog - digital signal conversion unit 263 and the calculation unit 265. The analog - digital signal conversion unit 263 the signal g2 from the second output terminal of the operational amplifier 231 is outputted by the analog to digital conversion, and outputs the converted digital signal to the computing unit 265. The calculation unit 265 based on the touch coordinates obtained digital signal is calculated. The calculation unit 265 is connected to the control chip 3, for outputting a signal to the touch coordinates master chip 3. The control chip 3 according to the signal corresponding to the touch coordinate represents the electronic control device 100 performs the corresponding function.

Incidentally, the structure of the signal processing circuit 26 is not limited to that shown in FIG. 12, for example, may be a common signal processing unit 231 into a plurality of operational amplifiers 261, rather than for each of the operational amplifier 231 respectively correspond to a signal processing unit 261 is connected.

Further, the operational amplifier 231 increases the signal processing unit 261 in the respective circuit module or omit part of the circuit module are possible, or using other circuit element modules or circuits to achieve the same function are also possible. Specifically, e.g., analog - digital signal after the conversion unit 263 and g2 between the second output terminal further comprising a filter unit, the filter unit second output signal g2 outputted after a filtering process and then outputs the filtered signal to analog - digital signal conversion unit 263.

As another example, the calculation unit 265 in the analog - digital signal conversion unit may be further provided between the level converting unit 263 264, the level converting unit 264 to the analog --263 outputs a digital signal converting unit digital signal is a digital signal level conversion, and outputs the level converting unit 265 to the calculation. The touch coordinate calculation unit 265 obtained after the calculation according to the digital signal level conversion. As another example, the calculation unit 265 and 264 are reversed to the level shifting means, respectively, said analog - digital signal output from the digital converting unit 263 converts the signal to the computing unit 265. After the received signal conversion unit 264 indicates touch coordinates calculating unit 265 according to the signal output digital signal obtained by calculation of the touch coordinates, and indicates touch coordinates to the level converting unit 264, the level conversion level , and then output to the control chip 3, so is also possible, according to the calculation unit 265 and the required analog - determining a digital voltage signal conversion unit 263.

Refer to FIG. 14, FIG. 14 is a schematic view of still another embodiment of the electronic device 100. The touch panel display may further include a ground element 10, the ground element, for example, a ground line L1. The ground line L1, for example, disposed around the plurality of pixels 11. However, the ground element is not limited to the ground line L1. Further, the scan driving circuit 28 may be integrated, for example, the upper panel 10 (Gate In Panel, GIP) on the touch display, respectively, the ground element can be driven in the ground element 28 as the scanning circuit. The ground line L1 may be omitted in other embodiments.

The drive circuit 20 may further include a first ground terminal 201 and the second ground terminal 203. The modulating circuit 21 is connected to the first ground terminal 201 and the second ground terminal 203. Wherein said first ground terminal 201 is connected to the ground element on the touch panel display 10, in the present embodiment, the first ground terminal 201 is connected to the ground line L1. The second device 203 is connected to the ground terminal, receives a ground signal GND. In the first period W1, the modulating circuit 201 outputs the modulation signal 21 via the first ground terminal MGND to the touch panel display 10; a second period W2, the modulating circuit 21 through the first ground an output terminal 201 of the ground signal GND to the touch panel display 10.

The drive circuit 20 may further comprise, for example, a slope controller 204, the slope controller 204 21 is connected to the modulation circuit for modulating the output of said slope control circuit 21 of the modulation signal, to reduce electromagnetic interference (EMI) . Also, the slope controller 204 is provided, for example, with reference to GND 80 domain. However, in other embodiments, the slope controller 204 may also be omitted.

The driving circuit 204 may further include a display processing circuit 205. The display processing circuit 205 is connected to the control chip 3 and the electrical connection between the level converting unit 264. The level converting unit 264 is further connected to a control circuit 25. The display processing circuit 205 is used to display data from the master chip 3 performs corresponding processing (e.g., storage, decompression, color adjustment, etc.). The level converting unit 264 disposed in the display processing circuit 205 and the control circuit 25, the data for displaying the display data processing circuit 205 of the level conversion processing, and the output level conversion to the control circuit 25. The control circuit 25 outputs the corresponding display data and timing signal to the display driving circuit 20a. The display driving circuit 20a converts the received data to the grayscale voltage, and based on the refresh timing signal to the corresponding pixel electrode 103 to perform the image displayed in the first period W1 of the first output gray scale voltage Vd1, in the second period W2 gray scale voltage Vd2 of the second output to the corresponding pixel electrode 103 performs image display refresh. Preferably the display data is a digital signal.

Incidentally, W2 of the second period, when the modulation scheme is not employed, the processing and control circuit 205 when the display signal processing circuit 25 between the control circuit 205 and level shifter when not required, the display signals between the circuit 25 without performing level conversion, however, in the first period W1, the modulation aspect, since the different voltage reference domain 80 and the reference domain 90, it is required to do the level conversion.

Similarly, W2 of the second period, when the calculation unit 265 and an analog - digital signal without converting the signal level conversion unit between 263, the calculation unit 265 and an analog - digital signal between the signal conversion unit 263 may not be level conversion, however, in the first period W1, the modulation aspect, since the different voltage reference domain 80 and the reference domain 90, it is required to do the level conversion.

Correspondingly, the level converting unit 264 may be, for example, by providing a switching element switching to control the first period and the second period W2 W1 whether the corresponding signal level conversion do respond. However, the switching element circuits, or other suitable configuration may also be provided outside the level converting unit 264.

In the present embodiment, each of the circuit modules 20 or the circuit unit drive circuit 80, 90 the division of two fields as follows: the display driving circuit 20a, the touch drive circuit 23, a portion (the operational amplifier 231 of the signal processing circuit 26 , analog - digital signal conversion unit 263), a data selector 24, and a control circuit of the circuit 25 are divided in MGND reference 90 domain, Further, the touch panel 10 is also divided into a domain 90; a modulation circuit 21, a display processing circuit 205, calculating unit 265, voltage generating circuit 27, the slope controller 204 are divided with reference to GND domain 80; level converting unit 264 spans two domains, i.e., field 80 in the part, a portion of the field 90, those of ordinary skill in the art, based on the principles described in the present application and the circuit can be determined level converting unit 264 are located in portions of the region 80 and the region 90, and is not repeated here.

Can be changed, the division of the drive circuit 20 may be other suitable cases, the above-described embodiment is not limited to the two divided domains 80, 90 of the above-described embodiments of the present invention.

It is further noted that the output signal from the domain 80 to domain 90 will MGND modulation signal is modulated correspondingly, will be modulated corresponding to the signal output domain 90 from the domain 80, e.g., opposite to the modulated signal modulated MGND Wait.

Since the touch panel display 10 while performing touch sensing signal modulated overall signal MGND synchronous modulation, wherein, the driving circuit 20 is supplied to the display drive signal of the common electrode 101 performs the image display, i.e., the common voltage, e.g., the second common voltage VC2, after the modulated signal MGND modulation, equally suitable for driving the common electrode 101 performs touch sensing, thereby ensuring the touch display panel 10 performs a normal image display while further driving the common electrode 101 performs touch sensing, and the other, It can also improve the SNR of the touch display apparatus 1, thereby increasing the accuracy of touch sensing.

Please refer to FIG. 14, in the present embodiment, the first period W1, since the driving circuit portion 20 is in reference to GND domain 80, the part 90 as a reference to MGND domain, current, there may be possible to field 90 backfeed region 80, in order to prevent this phenomenon, the electronic device 100 may further include a protection circuit 15, the protection circuit 15 is disposed between the domain and domain 80 90.

Specifically, the drive circuit 20 further includes a first end 206 and a second power supply terminal 207. Wherein said first power supply terminal 206 is located in the domain 90. Said second power supply terminal 207 and the power supply terminal 3 of the control chip 31 is connected. 3 the control chip 31 through the output terminal of the power supply to the second power supply voltage terminal 207. The protection circuit 15 is connected between the second power supply terminal 207 to the first power supply terminal 206.

MGND modulation signal when the drive signal (i.e., a second reference signal), the protection circuit 15 corresponds to the disconnect 206 is connected between said second power supply terminal 207 of the first power supply terminal; and when the MGND modulation signal to a signal ground GND (i.e., the first reference signal), the protection circuit 15 corresponding to the closing of the first power source 206 is connected between a second power supply terminal 207 to the terminal.

Please refer to FIG. 15, FIG. 15 is a schematic circuit configuration of a protection circuit 15 of the embodiment. In the present embodiment, the protection circuit 15 comprises a diode J1. J1 is connected to the anode of the diode second power supply terminal 207, the cathode of the diode J1 is connected to the first power supply terminal 206.

Alternatively, the protection circuit 15 further includes a first capacitor and a second capacitor Q1 Q2. Wherein the first capacitor Q1 is connected to the anode of diode J1 between the loading apparatus has a ground signal GND is ground, the second capacitor Q2 is connected to the cathode of diode J1 is loaded with a modulation signal modulated MGND ground. Wherein the first capacitor and the diode Q1 J1 set in the field 80, the second capacitor 90 is disposed Q2 domain.

15 embodiment is not limiting embodiment of the protection circuit above, e.g., see FIG. 16, FIG. 16 is a schematic circuit diagram of another embodiment of the protection circuit 15. To clearly distinguish the protection circuit 15 shown in FIG protection circuit 15 shown in FIG. 16 are denoted as 15a. The protective capacitor 15a includes a third active switch 151 and 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 third active switch 151 is connected to the control terminals K3 control unit 153, the first transmitting terminal T5 is connected to the second power supply terminal 207, the second transmitting terminal connected to a first power supply terminal T6 206 . MGND when the modulation signal is the drive signal, the control unit 153 controls the third active switch 151 is turned off, the protection circuit 15a corresponding to the first power supply terminal 206 is disconnected with the second power supply terminal 207 the connection between; when the modulation signal is a ground signal MGND the GND, the control unit 153 controls the third active switch 151 is turned on, the protection circuit 15a corresponding to the first power supply terminal 206 is closed and the connected between said second power supply terminal 207. The third active switch such as a thin film transistor 151, transistor, metal oxide semiconductor field effect transistor.

Further, alternatively, the protection circuit further comprises a first capacitor 15a and second capacitor Q1 Q2. Wherein a first capacitance of Q1 is connected to a first end of the transmission between the devices T5 and loaded with the signal GND is grounded, the capacitor Q2 is connected between the second modulator and the second terminals T6 is loaded with a modulation signal MGND.

Can be changed, in other embodiments, the modulating circuit 21 through the drive circuit 20 of the power supply or the reference power is modulated to achieve display of a touch panel 10 for all the signal synchronous modulation whole, and not limitation the device to be modulated. For example, the modulation terminal M of the modulation circuit 21 (except when used or may be connected to the first ground terminal than 201 (when the modulation), or may be connected to the first power supply terminal 206 is used as the modulation power supply ). When connected to or used as the first power supply terminal 206, the modulating circuit 21 is connected to a first power supply terminal 206 and the second power supply terminal 207. Said first power supply terminal 206 with respect to a first ground terminal 201, a power supply terminal is also referred to, both the loaded voltage is held constant.

Further, in addition to the first power supply terminal 206 and the first ground terminal 201, the driver circuit 20 generally comprises a reference power source terminal (not shown), when the first power supply terminal 206 for loading a first power source voltage, the first when a ground terminal 201 for loading a second power supply voltage, a reference power source terminal for loading said third power supply voltage, a third supply voltage level is between the first supply voltage level and the second power supply voltage between, wherein said first pressure supply voltage and the second power supply voltage is kept constant, the pressure difference of the first voltage and a third power supply voltage is kept constant. Also be used as the reference power source terminal or terminal connected to the modulator. That is, the power supply terminal, a reference power source terminal, the first three and one ground terminal connected to the modulation by the end use or correspondingly, as an end or connecting the supply voltage modulation comprises a modulation signal.

Accordingly, in the second period W2 of the load modulation terminal M a constant voltage, the drive circuit 20 provides a second gray scale voltage Vd2 to the pixel electrode 103, a second common voltage Vc2 to the common electrode 101, the driving the touch display panel 10 performs image display; the first period W1, M load modulation of the modulation signal side driving circuit 20 to provide a first gray scale voltage Vd1 to the pixel electrode 103, a first common voltage Vc1 to the common electrode 101, the driving the touch display panel 10 performs image display at the same time, and further driving a common electrode 101 performs self-capacitance touch sensing.

Further, the touch foregoing embodiment of the display apparatus 1 and the electronic device 100 may also be reduced or increased, or some combination of circuit elements and the like, for those of ordinary skill in the art, as long as by common knowledge, the prior art, and binding technical contents of the present application can be reasonably inferred aspect should fall within the scope of the present disclosure.

Can be changed, in other embodiments, the common electrode 101, for example, as the emission electrode, the scanning line 281 as a receiving electrode 281 is formed, for example, a mutual capacitance between the common electrode and the scanning line 101, the drive circuit 20 may drive the touch panel display 10 performs mutual capacitance touch sensing.

In other embodiments, the foregoing embodiments for the embodiment of the touch display apparatus 1 and the electronic device 100, all of the drive circuit 20 may be employed in addition to the overall synchronous modulation by the modulation or modulating the power supply or the modulation power reference 10 is a touch panel display signal, are simultaneously driven to achieve the touch display panel 10 performs image display and to the touch sensing mode, alternatively, simultaneously when the touch display apparatus 1 performs image display when the touch sensing, may also be non-modulated or non-modulated power supply or other non-modulated reference power modulation drive scheme, i.e., the electronic device 100 employs a field 80 to a ground reference signal GND reference voltage during operation.

While the embodiments herein has been on the specific configuration and operation sequence described, it will be understood that alternative embodiments may be increased, or changing elements are omitted, operation and the like. Accordingly, the embodiments disclosed herein are illustrative and not meant to limit embodiments.

Claims (33)

  1. A touch display device, comprising:
    The touch panel display, comprising a plurality of pixel electrodes and between a plurality of common electrodes, wherein the plurality of pixel electrodes and common electrodes for forming a plurality of the fringe electric field; and
    A drive circuit for driving the touch display panel performing image display, but also for driving the common electrode touch sensing performed; when the driving circuit drives the touch panel display while performing image display and touch sensing refresh, the signals on the plurality of pixel electrodes to a first gray level voltage, the signals on the plurality of common electrodes to the same first common voltage, wherein the first gray voltage and the first common voltage via both a modulated signal is modulated signal.
  2. According to claim 1 touch display device, wherein: the first gray level voltage and the first common voltage increased with increase of the modulation signal is raised, with the decrease of the modulation signal and reduce.
  3. The touch display as claimed in claim 1 apparatus, comprising: a first signal of the first gray voltage and the common voltage are synchronous modulation by the modulated signal.
  4. According to claim 1 touch display device, wherein: the drive circuit for providing the same first common voltage to the plurality of common electrodes simultaneously performing image display is further configured to simultaneously receive or timesharing the plurality of touch sensing signal output from the common electrode, to obtain touch information.
  5. According to claim 1 touch display device, wherein: when the drive circuit providing the gray scale voltage to a first portion of the pixel electrode, a first common voltage to provide the same to the plurality of common electrodes, the driving said touch display panel performing image display simultaneously refresh the touch is sensed, the remaining signals on the pixel electrode in a floating state due to capacitive coupling of the modulated signal is superimposed.
  6. Between said plurality of pixel electrodes in the same layer, a plurality of common electrodes in the same layer, a plurality of pixel electrodes and common electrodes of the plurality of: the touch of the display device according to claim 1, characterized in that stacked, wherein the number of said plurality of common electrodes is smaller than the number of the plurality of pixel electrodes.
  7. According to claim 6 touch display device, wherein: when the drive circuit drives the touch panel display simultaneously performed when the image sensing and touch sensing display refresh, refresh the pixel electrode performs image display and performs touch sensing do not overlap between the common electrode.
  8. According to claim 1 touch display device, wherein: the touch panel display further comprises:
    A plurality of scan lines;
    A plurality of data lines;
    A plurality of switching transistors, each transistor switch includes a control electrode, the first transfer electrode, and a second transfer electrode, wherein the scanning line connected to the control electrode, the first transfer electrode and the data line, a second transfer electrode connected to the pixel electrode ;
    When the drive circuit drives the touch panel display while performing image display and touch sensing sensing a plurality of scan line signals are signal after the modulation signal.
  9. According to claim 8 touch display device, wherein: the drive circuit for providing a first scan signal to turn on the switching transistor scanning line, the scanning line activation connected to a first gray scale voltage the plurality of data lines, and a transistor switch activated by the transmission to the corresponding pixel electrode, a first common supply the same voltage to the plurality of common electrodes, and receiving a touch sensing signal output from the common electrode to drive the said touch panel while performing image display refresh and self-capacitance touch sensing.
  10. 1-9 according to any one of the touch display apparatus as claimed in claim wherein: the drive circuit comprises a modulation circuit, a first ground terminal, and a second ground terminal, the modulation circuit connected to the first between the ground terminal and said second ground terminal, the second ground terminal for receiving a ground signal, a modulation circuit for modulating the signals according to the ground and generating a driving signal of the modulated signal, and outputs signal to the first ground terminal, the ground terminal when the first signal to said modulation signal, the touch signal on the panel are the signal after the modulation signal display.
  11. According to claim 10 touch display device, wherein: when the first ground signal to said modulation signal, or a signal on a signal from the panel driving circuit outputs the touch display, or because capacitive coupling of the modulated signal is superimposed.
  12. According to claim 10 touch display device, wherein: said driving circuit further includes a common voltage generating circuit, the touch driving circuit and a data selection circuit, wherein said data selecting circuit and said plurality of common electrodes connected to a common voltage generating circuit through the data selection circuit of the plurality of common electrodes may be selectively connected to the touch drive circuit through the data selection circuit of the plurality of common electrodes may be selectively connected with the said common voltage generating circuit for providing the data selection circuit through the first common voltage to the common electrode performs image display, the touch drive circuit for providing the first common voltage of the common electrode through the data selection circuit to while performing image display and touch sensing.
  13. The touch display as claimed in claim 12, wherein the apparatus is characterized in that: said driving circuit further includes a control circuit, the control circuit and the data selection circuit connected to the control circuit by controlling the data selection circuit corresponding to the control the common voltage generating circuit and the number of connections to the plurality of common electrodes, and controlling the number of touch drive circuit connected to the plurality of common electrodes.
  14. According to claim 13 touch display device, wherein: the control circuit, the common voltage generating circuit, the touch driving circuit and the data selection circuit are connected to the first ground terminal.
  15. The touch display according to claim 12 apparatus, wherein: when the touch drive circuit selection circuit provides a first voltage to the common portion of the common electrode while performing image display through the touch sensing data, the common voltage providing a first common voltage generating circuit to the rest of the common electrode performs all or part of the image display.
  16. The touch display as claimed in claim 12, wherein the apparatus is characterized in that: said data selection circuit comprises a first data selector and a plurality of second data selector, wherein the common voltage generating circuit by the first data selection and said plurality of common electrodes may be selectively connected to a plurality of touch drive circuit via said second data selector and said plurality of common electrodes may be selectively connected to a second data selector for each connecting portion a common electrode.
  17. The touch display as claimed in claim 16 said apparatus, wherein: said first data selector comprising a first plurality of output ports, each of the second data selector comprises a plurality of second output ports, each of the second output ports are connected a common electrode, the first data selector of each first output port connected between the second output port and the common electrode.
  18. According to claim 17 touch display device, wherein: the plurality of second output ports correspond to each of the plurality of first output ports of the second data selector selecting said first data is connected, or , a first portion of the second plurality of output port and the second output port of said first data selector connected to the data selector, or a plurality of first output ports of said first data selector and a second portion a plurality of data selector connected to a second output port of one to one.
  19. The touch of the display device according to claim 16, wherein: said plurality of common electrodes are arranged in rows and columns, a plurality of second output ports of the second data selector are connected to the same row or the same column a common electrode.
  20. The touch display as claimed in claim 16 said apparatus, wherein: said plurality of common electrodes are the number of columns arranged in rows and columns, the plurality of second data selector and said plurality of common electrodes the same, each of the plurality of second output ports of the second data selector and said plurality of common electrodes of the same number of rows, each of the plurality of second output ports of the second data selector and a common electrode respectively correspond connection, or a plurality of second data selector to the number of said plurality of common electrodes of the same number of rows, columns and a plurality of second output ports of said plurality of common electrodes of each of the second data selector the same number, a second plurality of output ports of each of the second data selector are connected to the common electrode line one by one.
  21. The touch display as claimed in claim 12, wherein the apparatus is characterized in that: the common voltage generating circuit comprises:
    Signal source, comprising a ground terminal and an output terminal, said ground terminal and said first ground terminal; and
    Follower connected to the first ground terminal, said follower by said data selection circuit of the plurality of common electrodes may be selectively connected to said follower for transmitting a signal output by the signal source to the said data selection circuit.
  22. According to claim 21 touch display device, wherein: the touch drive circuit comprising:
    The signal source; and
    A plurality of operational amplifiers, each connected to said first ground terminal, each part of the operational amplifier and the common electrode selection circuit is selectively connected by said data, said operational amplifier for transmitting the output of said signal source to the data selection circuit, and a transmission signal from the common touch sensing electrodes.
  23. According to claim 22 touch display device, wherein: the common voltage generating circuit further comprises a voltage regulator circuit, connected between the follower and a first ground terminal, the regulator circuit for the said follower output signal is regulated.
  24. According to claim 22 touch display device, wherein: said follower comprises a first amplifier, said first amplifier comprises a comprises a third power supply terminal, a third ground terminal, a first non-inverting terminal, a first trans phase terminal, and a first output terminal, wherein said third power supply voltage terminal for loading said third ground terminal connected to said first ground terminal, said first terminal connected to the in-phase signal source an output terminal, said first terminal of said first inverting output terminal connected to the first output terminal through the data selection circuit selectively connecting the plurality of common electrodes.
  25. According to claim 24 touch display device, wherein: each of the operational amplifier and the second amplifier comprises a feedback branch; the second amplifier comprises a fourth power supply terminal, a ground terminal of the fourth, the second phase side, the second two inverting terminal and a second output terminal, wherein the fourth power supply voltage terminal for loading said fourth ground terminal connected to said first ground terminal, said second terminal connected to the in-phase signal source output terminals, the second inverting input via a feedback branch is connected to the second output terminal, the second inverter circuit terminal further selected portion of the common electrode is selectively connected by data.
  26. According to claim 25 touch display device, wherein: when the ground terminal to the first modulation output signal of the modulating circuit, the signal source through the corresponding output of the first modulation signal a reference voltage signal to said first and second-phase-inverting terminal of the operational amplifier and a follower circuit outputs a corresponding selection of the first reference voltage signal through the same data voltage to the first common multiple common electrodes, to drive the touch panel display simultaneously performing image display and touch sensing.
  27. According to claim 25 touch display device, wherein: said driving circuit further includes a signal processing circuit connected to the output of said second signal processing circuit for receiving the touch sensing signal output from the common electrode, to acquire touch information.
  28. The touch display as claimed in claim 21 apparatus, wherein: said signal source is a direct current source.
  29. According to claim 1 touch display device, wherein: the driving circuit for driving said plurality of common electrodes perform self-capacitance touch sensing.
  30. According to claim 1 touch display device, characterized in that: said first modulation signal with respect to the common voltage remains constant.
  31. Touching the display device according to claim 1, wherein: by providing the same first common voltage to the plurality of common electrode driving circuit for, when the touch panel performing image display refresh the display driver, driving said plurality of common electrodes perform image display, and further drives the common electrode to perform a touch sensing.
  32. According to claim 10 touch display device, wherein: said driving circuit further includes a voltage generating circuit, said voltage generating circuit is connected to a device for generating the drive signal for the second ground terminal receiving signals from the device to the ground, the modulation circuit generates a modulated signal according to the driving signal and the signal ground.
  33. An electronic device comprising a touch 1-32 display device according to any one of claims.
PCT/CN2016/101339 2016-09-30 2016-09-30 Touch display unit and electronic device WO2018058647A1 (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103593083A (en) * 2012-08-16 2014-02-19 乐金显示有限公司 Display device having a touch screen and method of driving the same
CN105335009A (en) * 2015-12-03 2016-02-17 深圳磨石科技有限公司 Touch display device and electronic device
CN105373257A (en) * 2015-12-03 2016-03-02 深圳磨石科技有限公司 Touch display apparatus and electronic device
CN105426004A (en) * 2015-12-03 2016-03-23 深圳磨石科技有限公司 Driving method of touch display device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103593083A (en) * 2012-08-16 2014-02-19 乐金显示有限公司 Display device having a touch screen and method of driving the same
CN105335009A (en) * 2015-12-03 2016-02-17 深圳磨石科技有限公司 Touch display device and electronic device
CN105373257A (en) * 2015-12-03 2016-03-02 深圳磨石科技有限公司 Touch display apparatus and electronic device
CN105426004A (en) * 2015-12-03 2016-03-23 深圳磨石科技有限公司 Driving method of touch display device

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