Touch display device, driving circuit and driving method thereof

Abstract

The present application is applicable to the field of TDDI technology and provides a touch display device, a driving circuit thereof, and a driving method thereof. The driving circuit includes at least one display driving unit and at least one touch driving unit. The controlled end, input end, and output end of the display driving unit are used to electrically connect to a scan line, a data line, and a sub-pixel in a one-to-one correspondence. The controlled end, input end, and output end of the touch driving unit are used to electrically connect to a scan line, a data line, and a touch sensing unit corresponding to a display driving unit in a one-to-one correspondence. One touch sensing unit is electrically connected to the output ends of N touch driving units. The embodiments of the present application enable the TP to be embedded in the DP and designed as an incell panel. When displaying an image, the data channel is time-division multiplexed as the touch channel, allowing the DP and TP to operate simultaneously, thereby increasing the display time. The touch channel does not occupy the output channel, thereby improving the resolution.

Description

Technical Field

[0001] The present application belongs to the field of touch and display driver integration (TDDI) technology, and in particular relates to a touch display device and a driving circuit and a driving method thereof. Background Art

[0002] With the popularity and development of touch-screen display devices such as mobile phones and tablets, there is a demand for touch-screen display devices with smaller thickness and higher resolution. Touch-screen display devices are usually equipped with TDDI chips. Currently, TDDI chips usually design the display panel (DP) and touch panel (TP) separately, making the data channel (Source Channel) and touch channel (Touch Channel) independent of each other. When displaying images, the DP and TP work in a time-sharing manner, compressing the display time. In addition, the touch channel occupies a certain amount of output channel (Output Channel), resulting in reduced resolution. Summary of the Invention

[0003] In view of this, the embodiments of the present application provide a touch display device, a driving circuit, and a driving method thereof to solve the problem that existing TDDI chips usually design DP and TP separately, making the data channel and touch channel independent of each other. When displaying the picture, DP and TP work in a time-sharing manner, which compresses the display time, and the touch channel occupies a certain output channel, resulting in reduced resolution.

[0004] A first aspect of an embodiment of the present application provides a driving circuit for a touch display device, including:

[0005] M display driving units, wherein the controlled end, the input end, and the output end of the display driving unit are electrically connected to a scan line, a data line, and a sub-pixel in a one-to-one correspondence; and

[0006] M touch driving units, wherein the controlled end, input end, and output end of the touch driving unit are used for being electrically connected to the scan line, data line, and touch sensing unit corresponding to one of the display driving units in a one-to-one correspondence;

[0007] Wherein, within one frame time, the display driving unit transmits the level signal output by the corresponding data line to the corresponding sub-pixel according to the high level signal output by the corresponding scan line, thereby supplying power to the corresponding sub-pixel;

[0008] In one frame time, the touch driving unit transmits the level signal output by the corresponding data line to the corresponding touch sensing unit according to the low level signal output by the corresponding scan line, and supplies power to the corresponding touch sensing unit;

[0009] One of the touch sensing units is electrically connected to the output terminals of N touch driving units, where M and N are positive integers and M is greater than or equal to N.

[0010] In one embodiment, N is equal to 1.

[0011] In one embodiment, within one frame time, the display driving unit transmits the level signal output by the corresponding data line to the pixel electrode of the corresponding sub-pixel according to the high level signal output by the corresponding scan line, so as to charge the storage capacitor of the corresponding sub-pixel;

[0012] In one frame time, the touch driving unit transmits the level signal output by the corresponding data line to the corresponding touch sensing unit according to the low level signal output by the corresponding scan line, and charges the self-capacitance formed between the corresponding touch sensing unit and the ground.

[0013] In one embodiment, within one frame time, the display driving unit is turned on when the corresponding scan line outputs a high-level signal, transmits the level signal output by the corresponding data line to the pixel electrode of the corresponding sub-pixel, and charges the storage capacitor of the corresponding sub-pixel. The touch driving unit is turned off when the corresponding scan line outputs a high-level signal.

[0014] Within one frame time, the touch driving unit is turned on when the corresponding scan line outputs a low-level signal, and transmits the level signal output by the corresponding data line to the corresponding touch sensing unit to charge the self-capacitance formed between the corresponding touch sensing unit and the ground. The display driving unit is turned off when the corresponding scan line outputs a low-level signal.

[0015] In one embodiment, the driving circuit further includes:

[0016] m touch sensing units, each configured to output a corresponding touch sensing signal in response to a user's touch operation; and

[0017] a touch detection unit, electrically connected to the touch sensing unit, configured to determine, based on the touch sensing signal, the position of the touch operation performed by the user on the touch display device and output a corresponding position detection result to a processor of the touch display device;

[0018] Wherein, m is a positive integer and m is less than or equal to M.

[0019] In one embodiment, the driving circuit further includes:

[0020] a gate driving unit, the gate driving unit being electrically connected to the scan lines and configured to sequentially output level signals to the M scan lines corresponding to the M display driving units within one frame time;

[0021] A source driving unit is electrically connected to the data lines and is used to sequentially output level signals to the M data lines corresponding to the M display driving units within one frame time.

[0022] A second aspect of the embodiments of the present application provides a driving method for a touch display device, which is implemented based on the driving circuit provided in the first aspect of the embodiments of the present application. The driving method includes:

[0023] During one frame time, controlling the corresponding scan line of the display driving unit to output a high-level signal and the corresponding data line to output a level signal, so that the display driving unit transmits the level signal output by the corresponding data line to the corresponding sub-pixel according to the high-level signal output by the corresponding scan line, thereby supplying power to the corresponding sub-pixel;

[0024] Within one frame time, the touch driving unit is controlled to output a low-level signal on the scan line and a level signal on the data line, so that the touch driving unit transmits the level signal output by the corresponding data line to the corresponding touch sensing unit according to the low-level signal output by the corresponding scan line, thereby supplying power to the corresponding touch sensing unit.

[0025] A third aspect of the embodiments of the present application provides a touch display device, including:

[0026] M sub-pixels, wherein the M sub-pixels are arranged in an array to form a display layer;

[0027] m touch sensing units, wherein the m touch sensing units are arranged in an array to form a sensing layer; and

[0028] In the driving circuit provided by the first aspect of the embodiment of the present application, the M display driving units and the M touch driving units are arranged in an array to form a driving layer;

[0029] Wherein, m is a positive integer and M is less than or equal to m.

[0030] In one embodiment, the sub-pixel is a liquid crystal sub-pixel, the display layer includes a liquid crystal layer and a color filter layer, the color filter layer covers the liquid crystal layer, and the touch display device further includes a backlight module;

[0031] Alternatively, the sub-pixel is a self-luminous sub-pixel.

[0032] A driving circuit for a touch display device provided in a first aspect of an embodiment of the present application includes at least one display driving unit and at least one touch driving unit, wherein the controlled end, input end, and output end of the display driving unit are used to be electrically connected to a scan line, a data line, and a sub-pixel in a one-to-one correspondence, and the controlled end, input end, and output end of the touch driving unit are used to be electrically connected to a scan line, a data line, and a touch sensing unit corresponding to a display driving unit in a one-to-one correspondence, and one touch sensing unit is electrically connected to the output ends of N touch driving units, and within one frame time, the display driving unit is electrically connected according to the corresponding The high-level signal output by the scan line transmits the level signal output by the corresponding data line to the corresponding sub-pixel, and supplies power to the corresponding sub-pixel, so that the touch driving unit transmits the level signal output by the corresponding data line to the corresponding touch sensing unit according to the low-level signal output by the corresponding scan line, and supplies power to the corresponding touch sensing unit, so that TP can be embedded in DP and designed as an incell panel. When displaying the picture, the data channel is used as the touch channel through time-sharing multiplexing, so that DP and TP can work simultaneously, which increases the display time, and the touch channel does not occupy the output channel, thereby improving the resolution.

[0033] It can be understood that the beneficial effects of the second and third aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] Figure 1 This is a schematic diagram of the first structure of the driving circuit provided in an embodiment of the present application;

[0036] Figure 2 This is a first equivalent circuit schematic diagram of the driving circuit provided in an embodiment of the present application;

[0037] Figure 3 is a timing diagram of the scan signal and the data signal provided in an embodiment of the present application;

[0038] Figure 4 is a second equivalent circuit schematic diagram of the driving circuit provided in an embodiment of the present application;

[0039] Figure 5 Schematic diagram of the structure of the self-capacitor provided in an embodiment of the present application;

[0040] Figure 6Schematic diagram of the driving method provided in the embodiment of the present application;

[0041] Figure 7 is a structural diagram of a touch display device provided in an embodiment of the present application;

[0042] Reference numerals:

[0043] Display driving unit-11, touch driving unit-12, scan line-2, data line-3, sub-pixel-4, touch sensing unit-5, touch detection unit-6;

[0044] Storage capacitor - Cs, liquid crystal capacitor - Clc, parasitic capacitor - Cgd;

[0045] Display device 100 , display layer 101 , liquid crystal layer 1011 , color filter layer 1012 , sensing layer 102 , driving layer 103 , backlight module 104 . DETAILED DESCRIPTION

[0046] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0047] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0048] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0049] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0050] Example 1

[0051] like Figure 1 or Figure 2 As shown, the first embodiment of the present application provides a driving circuit for a touch display device, including:

[0052] M display driving units 11, wherein the controlled end, the input end, and the output end of the display driving unit 11 are used for electrically connecting with one scanning line 2, one data line 3, and one sub-pixel 4 in a one-to-one correspondence; and

[0053] M touch driving units 12, wherein the controlled end, input end, and output end of the touch driving unit 12 are electrically connected to the scan line 2, data line 3, and touch sensing unit 5 corresponding to one display driving unit 11 in a one-to-one correspondence;

[0054] One touch sensing unit 5 is electrically connected to the output ends of N touch driving units 12 .

[0055] In an application, the number of display driver units, touch driver units, and sub-pixels is the same. The output terminal of each display driver unit is electrically connected to a corresponding sub-pixel, the controlled terminal of each display driver unit and the controlled terminal of a corresponding touch driver unit are electrically connected to the same scan line, and the input terminal of each display driver unit and the input terminal of the corresponding touch driver unit are electrically connected to the same data line.

[0056] In an application, a touch display device includes M sub-pixels arranged in an array, where every three sub-pixels (for example, R sub-pixels, G sub-pixels, and B sub-pixels) are arranged in a row direction to form a pixel, or every four sub-pixels (for example, R sub-pixels, G sub-pixels, G sub-pixels, B sub-pixels, or R sub-pixels, G sub-pixels, B sub-pixels, and W sub-pixels) are arranged in a 2×2 array in the row and column directions to form a pixel.

[0057] In applications, M and N can be set to any positive integers according to actual needs, and M is greater than or equal to N. One touch sensing unit can be electrically connected to the output end of only one touch driving unit, or one touch sensing unit can be electrically connected to the output ends of multiple touch driving units.

[0058] Figure 1 exemplarily shows the case where N=1, that is, one touch sensing unit 5 is electrically connected to the output end of one touch driving unit 12;

[0059] Figure 2 exemplarily shows the case where N>1, that is, one touch sensing unit 5 is electrically connected to the output terminals of multiple touch driving units 12 .

[0060] In applications, by electrically connecting one touch sensing unit to the output terminal of one touch driving unit, the number of touch sensing units is equal to the number of display driving units, and the size of each touch sensing unit covers one sub-pixel, thereby maximizing the touch sensitivity of the touch display device. By electrically connecting one touch sensing unit to the output terminals of multiple touch driving units, the overall number of touch sensing units can be reduced, the area of each touch sensing unit can be increased, and the size of each touch sensing unit covers multiple sub-pixels, reducing wiring complexity and simplifying the structure. When multiple scan lines corresponding to multiple display driving units sequentially output low-level signals, the corresponding multiple data lines sequentially power one touch sensing unit.

[0061] based on Figure 1 or Figure 2 In the structure of the driving circuit shown, within one frame time, each display driving unit transmits a level signal output by a corresponding data line to a corresponding sub-pixel according to a high level signal output by a corresponding scan line, thereby supplying power to the corresponding sub-pixel.

[0062] In one frame time, each touch driving unit transmits a level signal outputted by a corresponding data line to a corresponding touch sensing unit according to a low level signal outputted by a corresponding scan line, thereby supplying power to the corresponding touch sensing unit.

[0063] In the application, each scan line first outputs a high-level signal and then outputs a low-level signal within one frame time. The start time of the previous scan line outputting a low-level signal is earlier than the time when the next scan line outputs a high-level signal.

[0064] According to the polarity reversal principle of a touch display device, when the voltage of the level signal output by the common electrode line electrically connected to each sub-pixel is lower than the voltage of the level signal output by the data line, it is called positive polarity. When the voltage of the level signal output by the common electrode line electrically connected to each sub-pixel is higher than the voltage of the level signal output by the data line, it is called negative polarity. To change the polarity of a sub-pixel, it is necessary to change the voltage of the level signal output by at least one of the common electrode line and the data line electrically connected to each sub-pixel, so as to change the magnitude relationship between the voltages of the level signals output by the common electrode line and the data line.

[0065] There are generally two ways to flip polarity:

[0066] The first method is to keep the voltage of the level signal output by the common electrode line electrically connected to the sub-pixel unchanged and change the voltage of the level signal output by the data line relative to the common electrode line;

[0067] The second method is to keep the voltage of the level signal output by the data line electrically connected to the sub-pixel unchanged and change the voltage of the level signal output by the common electrode line relative to the data line;

[0068] The first polarity reversal mode causes the voltage of the level signal outputted from a data line corresponding to each touch driving unit to a corresponding touch sensing unit to continuously change after the corresponding scan line outputs a low-level signal;

[0069] The second polarity reversal method enables the voltage of the level signal outputted from a data line corresponding to each touch driving unit to a corresponding touch sensing unit to remain unchanged after the corresponding scan line outputs a low-level signal.

[0070] like Figure 3 As shown, a timing diagram of the level signals output by M scan lines G1, G2, ..., GM and one data line S1 and S2 under two different flipping modes within one frame time is shown as an example; wherein T1, T2, ..., TM respectively represent the charging time of the storage capacitors of the sub-pixels corresponding to the M scan lines, and TS represents the charging time of the self-capacitance of the touch sensor unit.

[0071] like Figure 1 or Figure 2 As shown, in one embodiment, each sub-pixel 4 includes a storage capacitor Cs electrically connected to the output terminal of the corresponding display driving unit 11 .

[0072] In application, the storage capacitor is a parallel plate capacitor formed between the output terminal wiring of the display driving unit and the common electrode line, or it can be a parallel plate capacitor formed between the output terminal wiring of the display driving unit and the controlled terminal wiring of the next display driving unit. Figure 4 The storage capacitor Cs is exemplarily shown as a parallel plate capacitor formed between a wiring of the output end of the display driving unit 11 and a common electrode line for providing the common voltage Vcom.

[0073] based on Figure 1 or Figure 2 In the structure shown, within one frame time, the display driving unit transmits the level signal output by the corresponding data line to the pixel electrode of the corresponding sub-pixel according to the high level signal output by the corresponding scan line, thereby charging the storage capacitor of the corresponding sub-pixel.

[0074] like Figure 1 or Figure 2 As shown, in one embodiment, the display driving unit 11 includes a first switch tube Q1, and the gate, source and drain of the first switch tube Q1 respectively constitute the controlled end, input end and output end of the display driving unit 11;

[0075] The touch driving unit 12 includes a second switch tube Q2 , wherein the gate, drain and source of the second switch tube Q2 respectively constitute the controlled end, input end and output end of the touch driving unit 12 .

[0076] In applications, the display driving unit and the touch driving unit may be switching tubes, which may be thin film transistors (TFTs) or metal-oxide-semiconductor field-effect transistors (MOSFETs) (MOS tubes for short).

[0077] In an application, when the display driving unit is implemented by the first switching tube, within one frame time, the display driving unit is turned on when the corresponding scan line outputs a high-level signal, transmits the level signal output by the corresponding data line to the pixel electrode of the corresponding sub-pixel, and charges the storage capacitor of the corresponding sub-pixel. The touch driving unit is turned off when the corresponding scan line outputs a high-level signal;

[0078] When the touch driving unit is implemented by the second switching tube, within one frame time, the touch driving unit is turned on when the corresponding scan line outputs a low-level signal, and the level signal output by the corresponding data line is transmitted to the corresponding touch sensing unit, charging the self-capacitance formed between the corresponding touch sensing unit and the ground. The display driving unit is turned off when the corresponding scan line outputs a low-level signal.

[0079] like Figure 1 or Figure 2 As shown, in one embodiment, each sub-pixel 4 includes a liquid crystal capacitor Clc and a parasitic capacitor Cgd electrically connected to the corresponding display driving unit 11 .

[0080] In applications, a liquid crystal capacitor (LCC) is a flat plate capacitor formed between a pixel electrode wiring and a common electrode wiring. Figure 1 or Figure 2 The storage capacitor Cs is exemplarily shown as a parallel plate capacitor formed between the output wiring of the display driving unit 11 and the common electrode line for providing the common voltage Vcom. When the display driving unit is implemented by a switch tube, the capacitance is formed between the channel and gate of the switch tube.

[0081] like Figure 4 As shown, in one embodiment, a self-capacitance C is formed between the touch sensing unit 5 and the ground GND.

[0082] based on Figure 4In the structure shown, within one frame time, the touch driving unit transmits the level signal output by the corresponding data line to the corresponding touch sensing unit according to the low level signal output by the corresponding scan line, thereby charging the self-capacitance formed between the corresponding touch sensing unit and the ground.

[0083] like Figure 5 As shown, in one embodiment, the driving circuit provided in the first embodiment of the present application further includes:

[0084] m touch sensing units 5, the touch sensing units 5 being configured to output corresponding touch sensing signals in response to a user's touch operation; and

[0085] A touch detection unit 6 is electrically connected to the touch sensing unit 5 and is used to determine the point where the user's touch operation acts on the touch display device based on the touch sensing signal and output the corresponding point detection result to the processor of the touch display device.

[0086] In applications, m is a positive integer and is less than or equal to M. Each touch sensing unit is electrically connected to the output terminals of N touch driving units, and M=mN.

[0087] Figure 5 exemplarily shows the case where m=M, that is, one touch sensing unit 5 is electrically connected to the output end of one touch driving unit 12 .

[0088] In applications, when a touch sensing unit is electrically connected to the output end of a touch drive unit, the number of points on the touch display device is equal to the number of sub-pixels, and the touch sensitivity of the touch display device is maximized. When a touch sensing unit is electrically connected to the output ends of multiple touch drive units, the number of points on the touch display device is less than the number of sub-pixels, which can reduce wiring difficulty and simplify the structure. The point detection result can be point coordinate data or any other unique identification data (such as a binary code) that has a pre-established correspondence with the point coordinate data, allowing the processor to quickly find the corresponding point coordinate data based on the unique identification data, and thus quickly locate the point where the user touches the touch display device based on the point coordinate data, thereby making a corresponding response and executing the corresponding control operation.

[0089] In applications, the preset correspondence can be a mapping relationship, which can exist in the form of a correspondence table. The correspondence table can be a display lookup table (LUT), or it can be in the form of searching and outputting corresponding search results based on other input data. By establishing the correspondence in advance, the corresponding point coordinate data can be quickly found based on the unique identification data, effectively saving processor computing resources and execution time.

[0090] In applications, the processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. For example, the processor may be a timing controller (TCON). The general-purpose processor may be a microprocessor or any conventional processor.

[0091] In one embodiment, the driving circuit provided in the first embodiment of the application further includes:

[0092] The gate driving unit is electrically connected to the scan lines and is used to sequentially output level signals to the M scan lines corresponding to the M display driving units within one frame time;

[0093] The source driving unit is electrically connected to the data line and is used to output level signals to the M data lines corresponding to the M display driving units in sequence within one frame time.

[0094] In applications, the gate driver unit can be any device or circuit that has the function of scanning and charging the sub-pixels of a touch display device row by row, such as a gate driver IC or a thin-film gate driver chip (G-COF). The source driver unit can be any device or circuit that has the function of charging the sub-pixels of a touch display device column by column, such as a source driver IC or a thin-film source driver chip (S-COF).

[0095] The driving circuit of the touch display device provided in the first embodiment of the present application enables TP to be embedded in DP and designed as an incell panel. When displaying the picture, the data channel is time-shared multiplexed as the touch channel, so that DP and TP can work simultaneously, thereby increasing the display time, and the touch channel does not occupy the output channel, thereby improving the resolution.

[0096] Example 2

[0097] A second embodiment of the present application provides a driving method for a touch display device, which can be executed by a processor of the touch display device when running a corresponding computer program. The method controls the scan lines corresponding to the display driving unit to output high-level signals and the corresponding data lines to output level signals within one frame time, so that the display driving unit transmits the level signals output by the corresponding data lines to the corresponding sub-pixels based on the high-level signals output by the corresponding scan lines, thereby powering the corresponding sub-pixels. The method controls the scan lines corresponding to the touch driving unit to output low-level signals and the corresponding data lines to output level signals, so that the touch driving unit transmits the level signals output by the corresponding data lines to the corresponding touch sensing units based on the low-level signals output by the corresponding scan lines, thereby powering the corresponding touch sensing units. This method enables a TP to be embedded in a DP and designed as an incell panel. When displaying an image, the data channel is time-division multiplexed as a touch channel, so that the DP and TP can work simultaneously, thereby increasing the display time, and the touch channel does not occupy the output channel, thereby improving the resolution.

[0098] like Figure 6 As shown, the driving method of the touch display device provided in the second embodiment of the present application includes the following steps S101 and S102:

[0099] Step S101: Control the corresponding scan line of the display driver unit to output a high-level signal and the corresponding data line to output a level signal within one frame time, so that the display driver unit transmits the level signal output by the corresponding data line to the corresponding sub-pixel according to the high-level signal output by the corresponding scan line, thereby powering the corresponding sub-pixel, and then proceeds to step S102;

[0100] Step S102: Within one frame time, control the scan line corresponding to the touch driving unit to output a low-level signal and the corresponding data line to output a level signal, so that the touch driving unit transmits the level signal output by the corresponding data line to the corresponding touch sensing unit according to the low-level signal output by the corresponding scan line, thereby powering the corresponding touch sensing unit.

[0101] In application, the processor specifically controls the gate driving unit to output a scan signal to the scan line to implement step S101 , and controls the source driving unit to output a data signal to the data line to implement step S102 .

[0102] In one embodiment, the driving method provided in the second embodiment of the present application further includes:

[0103] According to the point detection result output by the touch detection unit, the point where the user performs a touch operation on the touch display device is located, a corresponding response is made, and a corresponding control operation is performed.

[0104] In the application, the control operations performed by the processor in response to the user's touch operation include but are not limited to display operations, voice broadcast operations, power-on operations, power-off operations, standby operations, and other control operations on the touch display device based on the user's touch operations.

[0105] Example 3

[0106] like Figure 7 As shown, the third embodiment of the present application provides a touch display device 100, including:

[0107] A display layer 101 composed of the M sub-pixels in the first embodiment arranged in an array;

[0108] A sensing layer 102 composed of m touch sensing units in the first embodiment arranged in an array; and

[0109] The driving layer 103 is formed by arranging the M display driving units and the M touch driving units in the first embodiment in an array.

[0110] In application, the display layer and the driving layer are inherent structures in DP. In the third embodiment of the present application, the sensing layer is set between the display layer and the driving layer, and a touch driving unit is additionally set in the driving layer, so that TP can be embedded in DP and designed as an incell panel. When displaying the picture, the data channel is time-division multiplexed as the touch channel, so that DP and TP can work simultaneously, which increases the display time, and the touch channel does not occupy the output channel, thereby improving the resolution.

[0111] In application, when the touch-controlled display device is a liquid crystal display (LCD) device, the sub-pixels are liquid crystal sub-pixels; when the touch-controlled display device is an organic electroluminescence display (OLED) device, a light emitting diode (LED) device, or a quantum dot light emitting diode (QLED) device, the sub-pixels are self-luminous sub-pixels.

[0112] like Figure 7 As shown, in one embodiment, the touch control display device 100 is a liquid crystal display device, the display layer 101 includes a liquid crystal layer 1011 and a color filter layer 1012, the color filter layer 1012 covers the liquid crystal layer 1011, and the touch control display device 100 further includes a backlight module 104;

[0113] In application, the backlight module can be a single-sided emitting structure, that is, the backlight source is disposed on one side panel of the touch-controlled display device, emitting light from the side. In other embodiments, the backlight module can also be a double-sided emitting structure, that is, backlight sources can be disposed on both sides of the touch-controlled display device, emitting light from both sides respectively; the backlight module can also be a back-emitting structure, with a backlight source disposed on the back panel of the touch-controlled display device, emitting light from the back.

[0114] Figure 7 The backlight module is exemplarily shown as a backlight structure.

[0115] It should be understood that Figure 7 The touch-controlled display device shown is merely exemplary and may also include other structures, for example, the other structures mentioned in the first embodiment, as well as an upper polarizer, a lower polarizer, a housing, and the like.

[0116] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A driving circuit for a touch display device, characterized in that: include: M display driving units, wherein the controlled end, the input end, and the output end of the display driving unit are used for electrically connecting with a scan line, a data line, and a sub-pixel in a one-to-one correspondence; as well as M touch driving units, wherein the controlled end, input end, and output end of the touch driving unit are used for being electrically connected to the scan line, data line, and touch sensing unit corresponding to one of the display driving units in a one-to-one correspondence; Wherein, within one frame time, the display driving unit transmits the level signal output by the corresponding data line to the corresponding sub-pixel according to the high level signal output by the corresponding scan line, thereby supplying power to the corresponding sub-pixel; In one frame time, the touch driving unit transmits the level signal output by the corresponding data line to the corresponding touch sensing unit according to the low level signal output by the corresponding scan line, and supplies power to the corresponding touch sensing unit; One of the touch sensing units is electrically connected to the output terminals of N touch driving units, where M and N are positive integers and M is greater than or equal to N.

2. The driving circuit according to claim 1, wherein: During one frame, the display driving unit transmits the level signal outputted by the corresponding data line to the pixel electrode of the corresponding sub-pixel according to the high level signal outputted by the corresponding scan line, thereby charging the storage capacitor of the corresponding sub-pixel; In one frame time, the touch driving unit transmits the level signal output by the corresponding data line to the corresponding touch sensing unit according to the low level signal output by the corresponding scan line, and charges the self-capacitance formed between the corresponding touch sensing unit and the ground.

3. The driving circuit according to claim 1, wherein: N is equal to 1.

4. The driving circuit according to any one of claims 1 to 3, wherein: The display driving unit includes a first switching tube, wherein the gate, source and drain of the first switching tube respectively constitute the controlled end, input end and output end of the display driving unit; The touch driving unit includes a second switch tube, and the gate, drain and source of the second switch tube respectively constitute the controlled end, input end and output end of the touch driving unit.

5. The driving circuit according to claim 4, wherein: During one frame, the display driving unit is turned on when the corresponding scan line outputs a high-level signal, transmits the level signal output by the corresponding data line to the pixel electrode of the corresponding sub-pixel, and charges the storage capacitor of the corresponding sub-pixel. The touch driving unit is turned off when the corresponding scan line outputs a high-level signal. Within one frame time, the touch driving unit is turned on when the corresponding scan line outputs a low-level signal, and transmits the level signal output by the corresponding data line to the corresponding touch sensing unit to charge the self-capacitance formed between the corresponding touch sensing unit and the ground. The display driving unit is turned off when the corresponding scan line outputs a low-level signal.

6. The driving circuit according to any one of claims 1 to 3, wherein: Also includes: m touch sensing units, each configured to output a corresponding touch sensing signal in response to a user's touch operation; as well as a touch detection unit, electrically connected to the touch sensing unit, configured to determine, based on the touch sensing signal, the position of the touch operation performed by the user on the touch display device and output a corresponding position detection result to a processor of the touch display device; Wherein, m is a positive integer and m is less than or equal to M.

7. The driving circuit according to claim 1 or 2, wherein: Also includes: a gate driving unit, the gate driving unit being electrically connected to the scan lines and configured to sequentially output level signals to the M scan lines corresponding to the M display driving units within one frame time; A source driving unit is electrically connected to the data lines and is used to sequentially output level signals to the M data lines corresponding to the M display driving units within one frame time.

8. A method for driving a touch display device, characterized in that: Implementation based on the driving circuit according to any one of claims 1 to 7, the driving method includes: During one frame time, controlling the corresponding scan line of the display driving unit to output a high-level signal and the corresponding data line to output a level signal, so that the display driving unit transmits the level signal output by the corresponding data line to the corresponding sub-pixel according to the high-level signal output by the corresponding scan line, thereby supplying power to the corresponding sub-pixel; Within one frame time, the touch driving unit is controlled to output a low-level signal on the scan line and a level signal on the data line, so that the touch driving unit transmits the level signal output by the corresponding data line to the corresponding touch sensing unit according to the low-level signal output by the corresponding scan line, thereby supplying power to the corresponding touch sensing unit.

9. A touch display device, characterized in that: include: M sub-pixels, wherein the M sub-pixels are arranged in an array to form a display layer; m touch sensing units, wherein the m touch sensing units are arranged in an array to form a sensing layer; as well as The driving circuit according to any one of claims 1 to 7, wherein the M display driving units and the M touch driving units are arranged in an array to form a driving layer; Wherein, m is a positive integer and m is less than or equal to M.

10. The touch display device according to claim 9, wherein: The sub-pixels are liquid crystal sub-pixels, the display layer includes a liquid crystal layer and a color filter layer, the color filter layer covers the liquid crystal layer, and the touch display device further includes a backlight module; Alternatively, the sub-pixel is a self-luminous sub-pixel.

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