TWI709882B - Touch display panel, touch driving circit, and touch driving method - Google Patents

Abstract

A touch display panel includes a first substrate and a second substrate opposite to each other, and a touch electrode structure. The electrodes for display are positioned on a side of the first substrate adjacent to the second substrate. The touch electrode structure is positioned between the electrodes for display and the second substrate or a side of the second substrate away from the first substrate. An isolation electrode layer is positioned between the electrodes for display and the touch electrode structure. The touch electrode structure includes a plurality of touch driving electrodes and a plurality of touch sensing electrodes. The isolation electrode layer includes isolation sub-electrodes that one-to-one correspond with the touch driving electrodes, and an electrical signal applied to each isolation sub-electrode and that applied to one corresponding touch driving electrode have waveforms with same frequency and are substantially synchronous. The isolation electrode layer is charged and discharged, the touch drive electrode does not charge and discharge, and the frequency of the touch drive electrode is increased. A touch driving circuit and a touch driving method for the touch display panel are also provided.

Description

Touch display panel, touch drive circuit and touch drive method

The present invention relates to a touch display panel, a touch driving circuit and a touch driving method used in the above touch display panel.

Thinning display devices is one of the development trends of the display industry. Take an OLED display device as an example for description. As shown in FIG. 1A, a conventional OLED display device usually includes an upper substrate 101 and a lower substrate 102 that are spaced apart and opposed to each other; the lower substrate 102 is located on a surface close to the upper substrate 101. The thin-film transistor layer 11, the anode layer 12, the organic light-emitting layer 13, and the cathode layer 14 are stacked in order from bottom to top. A gasket 80 is provided between the lower substrate 102 and the upper substrate 101 to protect the layers on the lower substrate 102 from being damaged due to the upper substrate 101 being squeezed. The upper substrate 101 mainly protects effect. The electrode structure on one side of the spacer 80 is disposed on the upper substrate 101, and the electrode structure on the opposite side of the spacer 80 is disposed on the lower substrate 102. Currently, there are generally two types of conventional OLED display devices with integrated touch functions. One is to provide a touch electrode structure 30 on the surface of the upper substrate 101 away from the lower substrate 102, which is generally referred to as an externally embedded (on- cell Type), as shown in FIG. 1A; the other is to arrange the touch electrode structure 30 on the surface of the upper substrate 101 close to the lower substrate 102, which is generally referred to as an in-cell type in the industry, as shown in FIG. Shown in 1B.

As the thickness of the display device becomes smaller and smaller, whether it is on-cell or in-cell, the distance between the display electrode (cathode or anode) and the touch electrode in the above-mentioned integrated touch function OLED display device As it becomes smaller and smaller, the signal fluctuation on the display electrode interferes with the signal of the touch electrode, resulting in an increasingly greater impact on the detection accuracy.

In view of this, it is necessary to provide a method for manufacturing a micro LED display panel, which can simplify the manufacturing process and improve the processing efficiency.

In view of this, it is necessary to provide a touch display panel, which can effectively avoid the interference of the display electrode signal to the touch electrode signal.

A touch display panel includes: a first substrate; a second substrate arranged opposite to the first substrate; a display electrode arranged on a side of the first substrate close to the second substrate; A control electrode structure, which is arranged between the display electrode and the second substrate or on the side of the second substrate away from the first substrate, the touch electrode structure includes a plurality of touch drive electrodes And a plurality of touch sensing electrodes insulated from the plurality of touch drive electrodes; and an isolation electrode layer, which is provided between the display electrodes and the touch electrode structure, to prevent electrical The signal interferes with the electrical signal of the touch electrode structure, the isolation electrode layer includes a plurality of isolation sub-electrodes arranged in a one-to-one correspondence with the plurality of touch drive electrodes, and the electrical signal applied to each isolation sub-electrode is different from the The waveforms of the electrical signals of the correspondingly configured touch drive electrodes have the same frequency and are basically synchronized.

The present invention also provides a touch display panel, which includes: a first substrate; The second substrate is arranged opposite to the first substrate; the display electrode is arranged on the side of the first substrate close to the second substrate; the touch electrode structure is arranged on the display electrode and Between the second substrates or arranged on a side of the second substrate away from the first substrate, the touch electrode structure is a single-layer self-capacitance type and includes a plurality of touch electrodes arranged at intervals; and an isolation electrode Layer, which is arranged between the display electrode and the touch electrode structure to prevent the electrical signal of the display electrode from interfering with the electrical signal of the touch electrode structure, and is applied to the isolation electrode layer The waveforms of the electrical signal and the electrical signal applied to the touch electrode have the same frequency and are basically synchronized.

The present invention also provides a touch driving method for driving the above-mentioned touch display panel. The touch driving method includes: providing a touch driving signal to at least a part of the touch electrode structure; The isolation electrode layer corresponding to the touch electrode structure of at least a part of the touch drive signal provides an isolated electrical signal with the same frequency and substantially synchronous with the touch drive signal.

The present invention also provides a first touch drive circuit for the above touch display panel, which includes a multi-level unit sub-circuit, and each level of the unit sub-circuit corresponds to a pair of correspondingly configured touch drive electrodes and isolation sub-electrodes. Configuration; each level of unit sub-circuit includes: trigger signal input terminal, used to connect the trigger signal; timing input terminal, used to connect the external clock control signal; high-level input terminal, used to connect the external high-level touch signal ; Low level input terminal, used to connect external fixed voltage signal or ground signal; touch drive signal output terminal, used to output touch drive signal to touch drive electrode; isolation signal output terminal, used to isolate sub-electrode Output the isolation signal with the same frequency and basic synchronization with the touch drive signal; The trigger signal output terminal is used to output a trigger signal to the next-level unit sub-circuit; and a signal generation module is used to output the same frequency as the clock control signal under the control of the clock control signal and the high-level touch signal in the first period And the basically synchronous signal outputs a fixed voltage signal or a ground signal in the second period.

The present invention also provides a second touch drive circuit for the above-mentioned touch display panel, which is configured to correspond to the above-mentioned first touch drive circuit and electrically connected, and the second touch drive circuit includes: A generator for generating and sending a clock control signal to the timing input end of the unit sub-circuit; a pulse generator for generating and sending a pulse trigger signal to the trigger signal input end of the first-level unit sub-circuit; and high voltage The level generator is used to generate and send a high-level touch signal to the high-level input terminal of the unit sub-circuit.

The present invention also provides a touch drive circuit for the above touch display panel, which includes a first touch drive circuit and a second touch drive circuit electrically connected to the first touch drive circuit. The touch drive circuit includes a multi-level unit sub-circuit, each level of the unit sub-circuit is correspondingly configured with a pair of correspondingly configured touch drive electrodes and isolation sub-electrodes; each level of the unit sub-circuit includes: a trigger signal input terminal for connecting the trigger signal ; Timing input terminal, used to connect external clock control signal; high-level input terminal, used to connect external high-level touch signal; low-level input terminal, used to connect external fixed voltage signal or ground signal; The touch drive signal output terminal is used to output a touch drive signal to the touch drive electrode; the isolation signal output terminal is used to output an isolation signal of the same frequency and basically synchronous with the touch drive signal to the isolator sub-electrode; The trigger signal output terminal is used to output a trigger signal to the next-level unit sub-circuit; and a signal generation module is used to output the same frequency as the clock control signal under the control of the clock control signal and the high-level touch signal in the first period And the basically synchronous signal outputs a fixed voltage signal or a ground signal in the second time period; the second touch drive circuit includes: a timing generator for generating and sending a clock control signal to the timing input of the unit sub-circuit; pulse Generator, which is used to generate and send a pulse trigger signal to the trigger signal input terminal of the first-level unit sub-circuit; and a high-level generator, which is used to generate and send a high-level touch signal to the high-level of the unit sub-circuit Level input terminal.

The present invention also provides a touch drive circuit for the above touch display panel, which is used to send a touch drive signal to the touch electrode structure and send required signals to the isolation electrode layer according to the touch drive signal. Electrical signal.

In this case, by adding an isolation electrode layer between the touch electrode structure and the display electrode, the shape of the isolation electrode layer is basically the same as that of the touch drive electrode, and its size is basically the same as that of the touch drive electrode. , The driving signal is at the same frequency and is basically synchronous, it becomes the isolation electrode layer to charge and discharge the charge, the touch drive electrode is the same as the isolation sub-electrode drive signal, so there is no need to charge and discharge the charge, the touch drive electrode frequency will be increased . The increase in the frequency of the touch drive electrode allows the optional operating frequency range of the touch sensing circuit to be enlarged. When encountering external interference signals, find a working frequency far away from the interference signal frequency, which can effectively reduce its interference. Therefore, a wide range of selectable operating frequencies can improve the anti-interference ability of the touch sensing circuit.

100, 200, 300: OLED touch display panel

101: Upper substrate

102: lower substrate

80: Gasket

10: The first substrate

20: second substrate

11: Thin film transistor layer

12: Anode layer

13: Organic light emitting layer

14: Cathode layer

30: Touch electrode structure

50: Isolation electrode layer

31: Touch drive electrode layer

33: Touch sensing electrode layer

311, 301, TX: touch drive electrodes

331, 303, RX: touch sensing electrode

51, IX: isolated sub-electrode

302, 103: touch electrodes

110: Touch display area

120: Border area

130: Touch drive circuit

131: The first touch drive circuit

133: The second touch drive circuit

1310: unit subcircuit

1311: signal generation module

1331: Timing Generator

1333: pulse generator

1335: high level generator

1337: Low-level generator

1A-1B are schematic cross-sectional structural diagrams of two existing OLED touch display panels.

2 is a schematic cross-sectional structure diagram of the OLED touch display panel according to the first embodiment of the present invention.

FIG. 3 is a partial schematic diagram of the OLED touch display panel shown in FIG. 2, which illustrates a three-dimensional schematic diagram of a configuration of a touch structure and an isolation electrode layer of the OLED touch display panel.

4 is a waveform diagram of driving signals applied to the spacer sub-electrodes and the touch driving electrodes.

5 is a schematic diagram of a cross-sectional structure of an OLED touch display panel according to a second embodiment of the present invention.

FIG. 6 is a partial schematic diagram of the OLED touch display panel shown in FIG. 5, which illustrates a three-dimensional schematic diagram of another configuration of the touch structure and the isolation electrode layer of the OLED touch display panel.

7 is a partial schematic diagram of the first configuration of the touch structure and the isolation electrode layer of the OLED touch display panel of the third embodiment.

8 is a partial schematic diagram of a second configuration of the touch structure and the isolation electrode layer of the OLED touch display panel of the third embodiment.

9 is a partial schematic diagram of a third configuration of the touch structure and the isolation electrode layer of the OLED touch display panel of the third embodiment.

10 is a partial schematic diagram of a fourth configuration of the touch structure and the isolation electrode layer of the OLED touch display panel of the third embodiment.

11 is a partial schematic diagram of a fifth configuration of the touch structure and isolation electrode layer of the OLED touch display panel of the third embodiment.

12 is a partial schematic diagram of a sixth configuration of the touch structure and the isolation electrode layer of the OLED touch display panel of the third embodiment.

FIG. 13 is a waveform diagram of electrical signals applied to the isolation electrode layer and the touch electrode.

14 is a schematic cross-sectional view of an OLED touch display panel according to a fourth embodiment of the invention.

15 is a schematic cross-sectional view of an OLED touch display panel according to a fifth embodiment of the invention.

FIG. 16 is a schematic diagram of a touch display panel according to a preferred embodiment of the present invention.

FIG. 17A is a schematic diagram of a touch driving circuit of a touch display panel according to a preferred embodiment of the present invention.

FIG. 17B is a schematic diagram of a second touch driving circuit module of the touch driving circuit according to a preferred embodiment of the present invention.

FIG. 18 is a block diagram of the first touch driving circuit of the touch driving circuit according to the preferred embodiment of the present invention.

FIG. 19 is a working sequence diagram of the touch display panel according to the preferred embodiment of the present invention.

The drawings show embodiments of the present invention. The present invention can be implemented in many different forms, and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more comprehensive and complete, and to enable those skilled in the art to fully understand the scope of the present invention.

An isolation electrode layer is arranged between the display electrode and the touch electrode structure of the touch display panel of the present invention, and the isolation electrode layer is used to prevent the signal loaded on the display electrode from interfering with the touch function of the touch electrode structure.

In an embodiment, the isolating sub-electrodes and the touch driving electrodes are arranged in a one-to-one correspondence, and the corresponding pair of isolating sub-electrodes and the touch driving electrodes overlap correspondingly, have substantially the same size and/or substantially the same shape.

Here, basically the same or basically the same includes the situation of complete and basically the same, where the basically the same is slightly larger or slightly smaller or slightly different within the allowable range. The same shape includes that the spacer sub-electrode and the touch drive electrode have the same main shape, allowing differences in details. The following embodiments of the specification list some embodiments of the present invention that are "essentially the same/equivalent" to help understanding, but it is understood that these embodiments are not exhaustive.

The touch display panel of the present invention is a display panel with a touch function. The display panel can be an in-cell touch display device in which a touch electrode structure is embedded in a display structure for displaying images, or can be an independent configuration An external in-cell touch display panel outside the display structure for displaying images. The display structure for displaying images can be a self-luminous display structure, such as an organic light-emitting diode display panel (OLED), etc., or a non-self-luminous display panel, such as a liquid crystal display panel (LCD).

The specific embodiments are described below by taking the OLED touch display panel as an example.

Example 1

Referring to FIG. 2, the OLED touch display panel 100 according to the first embodiment of the present invention includes a first substrate 10 and a second substrate 20 that are spaced apart and opposed to each other. The OLED touch display panel 100 further includes a thin film transistor layer 11 and an anode layer which are sequentially stacked on the surface of the first substrate 10 close to the second substrate 20 and in a direction gradually moving away from the first substrate 10. Layer 12, organic light emitting layer 13, and cathode layer 14. The thin film transistor layer 11, the anode layer 12, the organic light-emitting layer 13, and the cathode layer 14 are display structures for displaying images. It can be understood that the display structure of the OLED touch display panel 100 may also include other components, and these components, such as an electron transport layer, a hole transport layer, etc., can be arranged between the first substrate 10 and the second substrate 20 as required . The thin film transistor layer 11 is electrically connected to the anode layer 12 and the cathode layer 14, and the display driving signal is selectively transmitted to the anode layer 12 under the control of the thin film transistor layer 11, forcing the anode layer 12 and the cathode layer 14 to interact with each other. The light-emitting layer 13 is pressurized, thereby exciting the organic light-emitting layer 13 between the anode layer 12 and the cathode layer 14 to emit light correspondingly. In this embodiment, the second substrate 20 may be a packaging substrate that encapsulates the OLED display structure in an OLED display panel, and the touch electrode structure 30 as a touch structure is integrated in the display structure.

As shown in FIG. 2, a touch electrode structure 30 for realizing a touch function is also provided between the cathode layer 14 and the second substrate 20. In order to effectively prevent the electrical signal of the display electrode (such as the cathode layer 14) from interfering with the signal of the touch electrode structure 30, the touch electrode structure 30 and the An isolation electrode layer 50 is also provided between the cathode layers 14. Wherein, the isolation electrode layer 50 is electrically insulated from the touch electrode structure 30 and the cathode layer 14. FIG. 2 only shows the arrangement position of the three layers, and does not show the insulation that insulates them from each other. Floor.

In this embodiment, the type of the touch electrode structure 30 of the OLED touch display panel 100 is a double-layer mutual capacitance type. As shown in FIGS. 2 and 3, the touch electrode structure 30 includes stacked touch driving electrodes. The layer 31 and the touch sensing electrode layer 33, wherein the touch driving electrode layer 31 is closer to the isolation electrode layer 50 than the touch sensing electrode layer 33. Wherein, FIG. 2 and FIG. 3 both simply illustrate the arrangement positions of the touch driving electrode layer 31 and the touch sensing electrode layer 33, and do not show an insulating layer that insulates them from each other.

As shown in FIG. 3, the cathode layer 14 is a continuous monolithic electrode layer formed in the entire display area of the OLED touch display panel 100. The touch drive electrode layer 31 is non-continuous, and includes a plurality of touch drive electrodes 311 arranged at intervals, and each touch drive electrode 311 extends in a strip shape along the first direction D1. The multiple touch drive electrodes 311 are arranged at intervals along the second direction D2 (intersecting the first direction D1). The touch sensing electrode layer 33 is non-continuous and includes a plurality of touch sensing electrodes 331 arranged at intervals, and each touch sensing electrode 331 extends in a strip shape along the second direction D2. The sensing electrodes 331 are arranged at intervals along the first direction D1. In this embodiment, the first direction D1 is orthogonal to the second direction D2.

As shown in FIG. 3, the pattern of the isolation electrode layer 50 is basically the same as that of the touch drive electrode layer 31 (touch drive electrode layer), and the isolation electrode layer 50 is non-continuous and includes spaced-apart A plurality of isolating sub-electrodes 51, each isolating sub-electrode 51 extends in a long strip shape along the first direction D1, and the plurality of isolating sub-electrodes 51 are arranged at intervals along the second direction D2. In this embodiment, each isolating sub-electrode 51 is configured corresponding to one touch driving electrode 311, and each isolating sub-electrode 51 and its corresponding touch driving electrode 311 (touch driving electrode) are basically the same in shape and substantially the same size. . The "corresponding configuration" in this case refers to the corresponding overlap.

Among them, "the shape is basically the same" in this case means that the two shapes are completely the same or slightly different within the allowable range. The same shape includes that the isolating sub-electrode 51 and the correspondingly configured touch driving electrode 311 have the same main shape, and differences in the details of the shape are allowed. For example, it may be that both have the main shape with basically the same size but allow some small differences in the shape of the outline; for example, the main shapes of the two are roughly rectangular, and the edge of one of the outlines is straight, and the other is curved; Or when one contour edge is convex, the other contour edge is concave; or the contour shapes of the two are the same, but the two contour edges are separated by a gap of an allowable size range. The "substantially equivalent size" in this case means that the two sizes are exactly the same or the size is slightly larger or smaller. In short, the spacer electrode 51 and the touch drive electrode 311 are basically the same in shape and size, which can ensure that the signal on the cathode layer 14 cannot pass through the gap between the two adjacent spacer electrodes 51 to reach the touch drive electrode 311. .

As shown in FIG. 4, each touch driving electrode 311 is defined as TX1, TX2, TX3, ... TXn, and each isolating sub-electrode 51 corresponding to each touch driving electrode 311 is defined as IX1, IX2, IX3...IXn. Please refer to FIG. 4. FIG. 4 only shows the driving waveforms of the touch electrode structure 30 and the spacer sub-electrodes 51. Each touch driving electrode 311 is sequentially loaded with a touch driving signal to be scanned and driven. At the same time, according to the capacitance effect, the touch sensing signal sensed on the touch sensing electrode 331 is detected, and the capacitance variation difference is calculated. Get the coordinate position of the touch. Furthermore, in order to effectively avoid the interference of the signal of the cathode layer 14 on the signal of the touch electrode structure 30, the isolation sub-electrode 51 corresponding to the currently driven touch drive electrode 311 is loaded with an isolation signal, wherein The electrical signal of one isolating sub-electrode 51 and the waveform of the electrical signal applied to the correspondingly configured touch drive electrode 311 (touch drive electrode) have the same frequency and are basically synchronized. "Basically synchronized" in this case means that the phases of the two waveforms are the same or there is a very slight difference in phase, such as microseconds or less. In addition, the amplitude of the electric signal applied to the spacer electrode 51 and the electric signal applied to the corresponding touch drive electrode 311 may be Think the same, but also can be different. The waveform in this embodiment is not limited to the square wave shown in FIG. 4, but may also be a trapezoidal wave, a sine wave, and the like.

In this way, due to the masking effect of the spacer sub-electrode 51, the display signal loaded on the cathode layer 14 will not interfere with the touch driving electrode 311, let alone the touch sensing electrode 331.

Comparative example 1

Compared with the existing OLED display panel, when the touch drive electrode is directly arranged above the cathode layer, due to the existence of parasitic capacitance, when the touch drive electrode drives the square wave, it needs to charge and amplify the electric charge, plus the resistance, Due to the influence of capacitance, the operating frequency of the touch drive electrode will be relatively low.

In the OLED touch display panel 100 of this embodiment, an isolation electrode layer 50 is added between the touch drive electrode 311 and the cathode layer 14. The isolation electrode layer 50 includes a plurality of block-shaped spacer sub-electrodes arranged at intervals. 51. The isolating sub-electrodes 51 and the touch driving electrodes 311 are arranged in a one-to-one correspondence, and the driving signals of the isolating sub-electrodes 51 and the driving signals of the correspondingly arranged touch driving electrodes 311 have the same frequency and are basically synchronous. In Comparative Example 1, the charge and discharge of the isolated sub-electrodes 51 are switched, and the touch driving electrode 311 does not need to charge or amplify the amount of charge, so the frequency of the touch driving electrode 311 is increased. The frequency of the touch driving electrode 311 is increased, so that the selectable operating frequency range of the touch sensing circuit becomes larger. When encountering an external interference signal, find a working frequency far away from the frequency of the interference signal, which can effectively reduce its interference. Therefore, a wide range of selectable operating frequencies can improve the anti-interference ability of the touch sensing circuit.

Comparative example 2

Compared with another OLED touch display panel, its touch structure is a double-layer capacitive structure, and a continuous whole piece of isolation electrode layer is arranged between the touch drive electrode and the cathode layer. However, due to such an isolation electrode layer structure, it is assumed that if the isolation electrode layer is loaded with the same frequency as the touch scan signal If the signal is isolated, other touch driving electrodes that are not loaded with a touch driving signal will be affected by the isolation signal on the isolation electrode layer, resulting in greater noise.

In the OLED touch display panel 100 of this embodiment, an isolation electrode layer 50 is added between the touch drive electrode 311 and the cathode layer 14. The isolation electrode layer 50 includes a plurality of block-shaped spacer sub-electrodes arranged at intervals. 51. The isolating sub-electrodes 51 and the touch driving electrodes 311 are arranged in a one-to-one correspondence, and the driving signals of the isolating sub-electrodes 51 and the driving signals of the correspondingly arranged touch driving electrodes 311 have the same frequency and are basically synchronous. In Comparative Example 2, this structure can prevent the isolation signal from causing noise interference to the touch drive electrodes that are not loaded with the touch drive signal.

Deformably, the arrangement of the isolation electrode layer 50, the touch drive electrode layer 31, and the touch sensing electrode layer 33 includes any one of the following: (1) the isolation electrode layer 50, the touch The driving electrode layer 31 and the touch sensing electrode layer 33 are both disposed on the first substrate 10. At this time, spacers (not shown in the figure, the spacers are used to protect the layers on the first substrate 10 from being damaged. The second substrate 20 is pressed to cause damage) is arranged between the touch sensing electrode layer 33 and the second substrate 20; (2) the isolation electrode layer 50 and the touch drive electrode layer 31 are both arranged On the first substrate 10, the touch sensing electrode layer 33 is disposed on the surface of the second substrate 20 close to the first substrate 10. At this time, a gasket (not shown) is disposed on the touch panel. Between the control driving electrode layer 31 and the touch sensing electrode layer 33; (3) the isolation electrode layer 50 is disposed on the first substrate 10, the touch driving electrode layer 31 and the touch sensing electrode layer The electrode layers 33 are all disposed on the surface of the second substrate 20 close to the first substrate 10. At this time, a spacer (not shown) is disposed between the isolation electrode layer 50 and the touch drive electrode layer 31 between; (4) The isolation electrode layer 50, the touch drive electrode layer 31, and the touch sensing electrode layer 33 are all disposed on the surface of the second substrate 20 close to the first substrate 10. A sheet (not shown) is arranged between the isolation electrode layer 50 and the cathode layer 14.

Example 2

Referring to FIG. 5, the OLED touch display panel 200 according to the second embodiment of the present invention includes a first substrate 10 and a second substrate 20 that are spaced apart and opposed to each other. On the surface of the first substrate 10 close to the second substrate 20, a thin film transistor layer 11, an anode layer 12, an organic light-emitting layer 13, and a cathode layer 14 are sequentially laminated and arranged in a direction gradually away from the first substrate 10. . A touch electrode structure 30 is also provided between the cathode layer 14 and the second substrate 20. In order to effectively prevent the electrical signal of the display electrode (such as the cathode layer 14) from interfering with the signal of the touch electrode structure 30, an isolation electrode layer 50 is further provided between the touch electrode structure 30 and the cathode layer 14. Wherein, the isolation electrode layer 50 and the touch electrode structure 30 are electrically insulated from the cathode layer 14. FIG. 5 only shows the arrangement position of the three layers, and does not show the insulation that insulates them from each other. Floor. For ease of description, in each embodiment, the same component names use the same component numbers.

In this embodiment, as shown in FIG. 6, the touch electrode structure 30 is of a single-layer mutual capacitance type, and the touch electrode structure 30 includes a plurality of touch driving electrodes 301 and a plurality of touch sensing electrodes arranged on the same layer 303. A row of touch driving electrodes 301 in the first direction D1 is electrically connected to form a series of touch driving electrodes 301, and a row of touch sensing electrodes 303 in the second direction D2 (intersecting the first direction D1) is electrically connected to form a touch The series of sensing electrodes 303 are controlled, wherein the series of touch driving electrodes 301 and the series of touch sensing electrodes 303 are insulated from each other and cross.

As shown in FIG. 6, the pattern of the isolation electrode layer 50 and the touch electrode structure 30 are basically the same. The isolation electrode layer 50 is non-continuous, and includes a plurality of isolation sub-electrodes 51 arranged on the same layer. A row of spacer electrodes 51 in the first direction D1 are electrically connected to form a row and series of spacer electrodes 51, and a column of spacer electrodes 51 in the second direction D2 are electrically connected to form spacer electrodes. A column series of the electrodes 51, wherein the row series of the spacer sub-electrodes 51 and the column series of the spacer sub-electrodes 51 are insulated from each other and cross. In this embodiment, each row series of the isolating sub-electrodes 51 are arranged corresponding to (ie correspondingly overlapping) with a series of the touch drive electrodes 301, and each isolating sub-electrode in a row of the isolating sub-electrodes 51 51 is configured corresponding to one touch driving electrode 301 in the series of correspondingly configured touch driving electrodes 301 (that is, correspondingly overlapping), and has substantially the same shape and substantially the same size. Each column series of the isolating sub-electrodes 51 is arranged corresponding to (ie correspondingly overlapping) with a series of the touch sensing electrode 303, and each isolating sub-electrode 51 in each series of the isolating sub-electrodes 51 is corresponding to One touch-sensing electrode 303 in the series of touch-sensing electrodes 303 is correspondingly arranged (ie correspondingly overlapped) and has substantially the same shape and substantially the same size. In short, the isolation electrode layer 50 and the touch electrode structure 30 are basically the same in shape and the size is basically the same, so as to ensure that the signal on the cathode layer 14 cannot pass through the adjacent two isolation sub-electrodes 51. The gap therebetween reaches the touch electrode structure 30.

4, the series of touch drive electrodes 311 are defined as TX1, TX2, TX3, ... TXn, and the isolating sub-electrodes corresponding to the series of touch drive electrodes 311 are defined. The respective column series of 51 are IX1, IX2, IX3, ... IXn. Each series of touch driving electrodes 311 is sequentially loaded with touch driving signals. In order to effectively avoid the interference of the signals of the cathode layer 14 on the signals of the touch electrode structure 30, it is also required: as shown in FIG. 4, the electrical signals applied to the rows and columns of the spacer sub-electrodes 51 and the touch signals applied to the corresponding configuration The waveforms of the electrical signals of the series of driving electrodes 301 have the same frequency and are basically synchronized. The electrical signal applied to the series of spacer electrodes 51 is a DC voltage signal or a ground signal. In addition, the amplitudes of the electrical signals applied to the row and series of the spacer electrodes 51 and the electrical signals applied to the series of the touch drive electrodes 301 correspondingly arranged may be the same or different. .

Compared with Comparative Example 1 and Comparative Example 2, the OLED touch display panel 200 of this embodiment achieves the same technical effects as described above.

Comparative example 3

Compared with another OLED touch display panel, its touch structure is a single-layer mutual-capacitive structure, and a continuous whole piece of isolation electrode layer is arranged between the touch drive electrode and the cathode layer. However, due to such The isolation electrode layer structure. When the isolation signal with the same frequency as the touch drive signal is loaded, the distance between the isolation electrode layer and the touch sensing electrode is large, and the mutual capacitance reference value (CM) will be very large. Affect the accuracy of touch detection.

In the OLED touch display panel 200 of this embodiment, an isolation electrode layer 50 is added between the touch drive electrode 301 and the cathode layer 14; the isolation electrode layer 50 includes a plurality of block-shaped spacer sub-electrodes arranged at intervals 51. The row and series of isolating sub-electrodes 51 and the series of touch drive electrodes 301 are arranged in one-to-one correspondence, the row and series of isolating sub-electrodes 51 and the series of touch sensing electrodes 303 are arranged in one-to-one correspondence, and the isolating sub-electrodes The drive signal of the row series of 51 and the drive signal of the series of touch drive electrodes 301 corresponding to it have the same frequency and are basically synchronized. Compared with Comparative Example 3, this structure will separate the electrode layer. It is divided, and the spacer electrode under the touch sensing electrode 303 is connected to a constant voltage, so that the reference value of mutual capacitance is small, thereby improving the detection accuracy.

In this way, due to the shielding effect of the spacer sub-electrode 51, the signal on the cathode layer 14 will not interfere with the touch driving electrode 301.

Wherein, the arrangement of the isolation electrode layer 50 and the touch electrode structure 30 includes any one of the following:

(1) The isolation electrode layer 50 and the touch electrode structure 30 are both disposed on the first substrate 10. At this time, spacers (not shown) are disposed on the touch electrode structure 30 and the first substrate 10. Between two substrates 20;

(2) The isolation electrode layer 50 is disposed on the first substrate 10, and the touch electrode structure 30 is disposed on the surface of the second substrate 20 close to the first substrate 10. At this time, the spacer ( (Not shown) is arranged between the isolation electrode layer 50 and the touch electrode structure 30.

(3) The isolation electrode layer 50 and the touch electrode structure 30 are both disposed on the surface of the second substrate 20 close to the first substrate 10. At this time, a spacer (not shown) is disposed on the Separate between the electrode layer 50 and the cathode layer 14.

Example 3

Please continue to refer to FIG. 5, the cross-sectional view of the OLED touch display panel 300 of the third embodiment of the present invention is exactly the same as the cross-sectional view of the OLED touch display panel 200 of the second embodiment shown in FIG. And the first substrate 10 and the second substrate 20 are disposed oppositely; on the surface of the first substrate 10 close to the second substrate 20, a thin film transistor layer 11 is successively laminated in a direction gradually away from the first substrate 10 , The anode layer 12, the organic light-emitting layer 13, and the cathode layer 14; a touch electrode structure 30 is also provided between the cathode layer 14 and the second substrate 20; the touch electrode structure 30 and the cathode layer An isolation electrode layer 50 is also provided between 14.

The difference between the OLED touch display panel 300 of this embodiment and the OLED touch display panel 200 of the second embodiment is that: in the second embodiment, the touch electrode structure 30 is of a single-layer mutual capacitance type; and this embodiment As shown in FIG. 7, the touch electrode structure 30 is a single-layer self-capacitance type, and the touch electrode structure 30 includes a plurality of touch electrodes 302 arranged on the same layer at intervals.

In this embodiment, as shown in FIGS. 7 to 12, the pattern of the isolation electrode layer 50 can be adjusted according to the pattern of the plurality of touch electrodes 302.

In this embodiment, when each touch electrode 302 is a rectangular block, and the plurality of touch electrodes 302 are arranged in a matrix (as shown in FIGS. 7-9), the pattern of the isolation electrode layer 50 can be specifically set One of the following.

(1.1) As shown in FIG. 7, the isolation electrode layer 50 may be a continuous monolithic electrode layer formed in the entire display area of the display panel 300 and cover the plurality of touch electrodes 302.

(1.2) As shown in FIG. 8, the isolation electrode layer 50 is discontinuous, and includes a plurality of isolation sub-electrodes 51 arranged at intervals and arranged in a matrix. The isolation sub-electrodes 51 and the touch electrodes 302 are arranged in a one-to-one correspondence; each isolation sub-electrode 51 and its corresponding touch electrode 302 overlap correspondingly, have substantially the same shape, and substantially the same size. It is understandable that the size of each isolating sub-electrode 51 can also be set to be slightly smaller than the size of one touch electrode 302, as long as the gap between two adjacent isolating sub-electrodes 51 is sufficiently small (for example, less than one pixel). The size of the electrode), so that the signal of the cathode layer 14 cannot pass through the gap between the spacer sub-electrodes 51 to reach the touch electrode 302.

(1.3) As shown in FIG. 9, the isolation electrode layer 50 is discontinuous and includes a plurality of isolation sub-electrodes 51 arranged at intervals. Each isolating sub-electrode 51 is configured corresponding to at least two touch electrodes 302; each isolating sub-electrode 51 and its corresponding at least two touch electrodes 302 overlap correspondingly, have substantially the same shape, and have substantially the same size. As shown in FIG. 9, each isolating sub-electrode 51 corresponds to overlap with a plurality of touch electrodes 302 arranged in one direction.

In this embodiment, as shown in FIGS. 10-12, when the plurality of touch electrodes 301 include multiple pairs of triangular electrodes, two triangular electrodes arranged at intervals (independent) in each pair of triangular electrodes are put together to form one It is a long rectangle. In this case, the pattern of the isolation electrode layer 50 can be specifically set as one of the following.

(2.1) As shown in FIG. 10, the isolation electrode layer 50 may be a continuous monolithic electrode layer formed in the entire display area of the display panel 300 and cover the plurality of touch electrodes 302.

(2.2) As shown in FIG. 11, the isolation electrode layer 50 is discontinuous, and includes a plurality of isolation sub-electrodes 51 arranged at intervals. The shaped touch electrodes 302 are arranged in a one-to-one correspondence; each triangular spacer sub-electrode 51 and its corresponding touch electrode 302 overlap correspondingly, have substantially the same shape, and have substantially the same size.

(2.3) As shown in FIG. 12, the isolation electrode layer 50 is discontinuous, and includes a plurality of isolation sub-electrodes 51 arranged at intervals, and each isolation sub-electrode 51 is configured corresponding to at least a pair of triangular electrodes; The electrodes 51 are arranged in a long rectangular shape, correspondingly overlapped with the corresponding at least a pair of triangular electrodes, have substantially the same shape, and substantially the same size. As shown in FIG. 12, each spacer electrode 51 is arranged corresponding to a pair of triangular electrodes.

It can be understood that the shape of each touch electrode 302 is not limited to the rectangular and triangular shapes shown in FIGS. 7-12, and may also be any regular or irregular shape.

For the single-layer self-capacitance OLED touch display panel 300 in this embodiment, the plurality of touch electrodes 302 can all be driven at the same time (to be loaded with touch driving signals at the same time). As shown in FIG. 13, under this condition, the electrical signal applied to the isolation electrode layer 50 (isolator sub-electrode 51) and the electrical signal applied to the touch electrode 302 have the same frequency and are basically synchronized. As shown in Figure 13. In addition, the electrical signal applied to the isolation electrode layer 50 (isolator sub-electrode 51) and the electrical signal applied to the touch electrode 302 may have the same or different waveform amplitudes. The waveform in this embodiment is not limited to the square wave shown in FIG. 13, but may also be a trapezoidal wave, a sine wave, and the like.

It can be understood that, in this embodiment, the plurality of touch electrodes 302 can also be driven in a time-sharing manner (loaded into touch driving signals sequentially). In this case, the isolation electrode layer 50 must be non-continuous and It includes a plurality of spacer sub-electrodes 51 arranged at intervals, and each spacer sub-electrode 51 is configured corresponding to at least one touch electrode 302. Under this condition, the electrical signal applied to the spacer electrode 51 and the electrical signal applied to the touch electrode 302 correspondingly arranged have the same frequency and are substantially synchronized.

In the above three embodiments, in the OLED touch display panels 100, 200, 300, the touch electrode structure 30 is located between the cathode layer 14 and the second substrate 20, and is in place Between the first substrate 10 and the second substrate 20, the OLED touch display panels 100, 200, and 300 are in-cell type. It is understandable that in other embodiments, the OLED touch display panel can also be changed to an on-cell type, that is, the touch electrode structure 30 is disposed on the side of the second substrate 20 away from the first substrate 10 , The isolation electrode layer 50 is disposed between the second substrate 20 and the cathode layer 14 (as shown in FIG. 14) or the isolation electrode layer 50 is disposed on the second substrate 20 and the touch Between the electrode structures 30, as shown in FIG. 15.

It is understandable that the isolation electrode layer is not limited to be used in OLED touch display panels, but can also be used in LCD touch display panels. For example, the isolation electrode layer is provided on the touch electrode structure and the display electrodes (such as common Between the electrode layers) to prevent signals from the display electrodes (such as the common electrode layer) from interfering with the touch electrode structure.

Referring to FIG. 16, in this embodiment, the OLED touch display panel defines a touch display area 110 and a frame area 120 surrounding the touch display area 110. The touch driving electrodes TX and the spacer sub-electrodes IX are arranged in the touch display area 110, a touch driving circuit 130 is arranged in the frame area 120, and the touch driving circuit 130 is electrically connected to the touch driving Electrode TX and spacer electrode IX. In this embodiment, the signal applied to the isolation electrode layer (for example, the isolation sub-electrode IX) and the touch drive signal have the same frequency, phase, and amplitude as an example, and the touch drive electrode TX and the isolation sub-electrode IX are respectively There are 36 (respectively named TX1, TX2, TX3...TX36; IX1, IX2, IX3...IX36) and one-to-one corresponding configuration. There are 18 touch sensing electrodes RX (respectively named RX1, RX2, RX3 ...RX18) is an example for illustration. 16 shows the touch drive electrode TX and the spacer sub-electrode IX better at the same time, the correspondingly configured touch drive electrode TX and the spacer sub-electrode IX do not completely overlap; in fact, the correspondingly configured touch drive electrode TX and spacer electrode IX should be overlapped.

As shown in FIGS. 16-17, the touch drive circuit 130 in this embodiment includes two parts, one of which (the circuit in the panel or the first touch drive circuit 131) is directly formed on the On the touch display panel, the electronic components are directly formed on the touch panel, and the other part (the circuit outside the panel or the second touch drive circuit 133) is an external independent IC (integrated circuit) (for example, by a flexible circuit) The board is connected to the touch panel); the first touch drive circuit 131 and the second touch drive circuit 133 are electrically connected. It can be understood that, in other embodiments, the first touch drive circuit 131 and the second touch drive circuit 133 can also be integrated into a single IC; or a circuit in a panel\first touch drive circuit 131 Both the external circuit of the panel and the second touch driving circuit 133 are independently an IC.

It is understandable that the driving waveforms of the touch driving electrodes TX and the isolating sub-electrodes IX can be directly provided by the IC, or the original frequency waveforms can be provided by the IC, which are converted into the driving of the touch driving electrodes and the isolating sub-electrodes through the circuit in the panel. Waveform. In this embodiment, the first touch drive circuit 131 is used to generate and provide touch drive signals for touch to the touch drive electrodes TX and isolation signals to the spacer sub-electrodes IX; the second touch drive circuit 133 generates the first Various control signals required for the operation of the touch driving circuit 131 include clock control signals, initial pulse trigger signals, high-level touch signals, and fixed voltage signals. The initial pulse trigger signal is used to trigger the first touch driving circuit 131. In this embodiment, at the falling edge of the initial pulse trigger signal, the first touch drive circuit 131 is triggered to start outputting the touch drive signal and the isolation signal. The high-level touch signal is used in conjunction with the clock signal to control the first touch drive circuit to output a high-level electrical signal synchronized with the clock signal and at the same frequency as the touch drive signal and isolation signal. The fixed voltage signal is much smaller than the high-level touch signal, and is used to lower the level of the signal output by the first touch drive circuit.

As shown in FIG. 18, the second touch driving circuit 133 includes: a timing generator 1331, which is used to generate a clock control signal; a pulse generator 1333, which is used to generate a start pulse trigger signal; a high-level generator 1335, which is used to generate a high-level touch signal; and The low-level generator 1337 is used to output a fixed voltage signal (less than the high-level touch signal) or a ground signal.

The second touch driving circuit 133 is also provided with a touch sensing receiving circuit (not shown) for electrically connecting to the touch sensing electrode RX and receiving touch sensing signals.

As shown in FIGS. 16 and 17A, the first touch drive circuit 131 receives the control signal from the second touch drive circuit 133, is electrically connected to and outputs signals to the plurality of touch drive electrodes and the Multiple isolation sub-electrodes. As shown in FIG. 17A, the first touch driving circuit 131 includes a multi-level unit sub-circuit 1310, and each level of the unit sub-circuit 1310 is configured corresponding to a touch driving electrode and its correspondingly configured isolating sub-electrode. The multi-level unit sub-circuit 1310 sequentially outputs the touch drive signal and the isolation signal that are at the same frequency and basically synchronized with the clock signal, and the touch drive signal and the isolation signal output by the adjacent unit sub-circuit 1310 differ by a predetermined displacement. The touch drive signals and isolation signals output to the plurality of touch drive electrodes and the isolation sub-electrodes are also at the same frequency and basically synchronized. In this embodiment, the output waveforms of the touch drive signal and the isolation signal are determined by the clock control signal, and follow the change of the clock control signal.

As shown in FIG. 17B, each level unit sub-circuit 1310 includes: a trigger signal input terminal for connecting a trigger signal SP (such as the initial pulse trigger signal output by the pulse generator in this embodiment); a timing input terminal for Connect the external clock control signal TX-CLK (such as the clock control signal output by the timing generator in this embodiment); the high-level input terminal is used to connect the external high-level touch signal TX-H (such as this embodiment) The high-level touch signal output by the high-level generator in the example); the low-level input terminal is used to connect the external fixed voltage signal TX-L (for example, the output of the low-level generator in this embodiment is less than The fixed voltage signal or ground signal of the high-level touch signal TX-H); the touch drive signal output terminal is used to output the touch drive signal to the touch drive electrode TX; The isolation signal output terminal is used to output to the isolating sub-electrode IX a signal with the same frequency and basically synchronized with the touch drive signal; the trigger signal output terminal is used to output the trigger signal SPO to the next-level unit sub-circuit (as in this embodiment) The pulse trigger signal output by the pulse generator); and the signal generation module 1311 for outputting synchronization with the clock control signal under the control of the clock control signal TX-CLK and the high-level touch signal TX-H in the first period High-level signals with the same frequency are outputting fixed voltage signals or ground signals in the second period. The multi-level signal generation module of the first touch drive circuit may have a circuit configuration such as a shift register, so that the touch drive signal/isolation signal is generated in a manner of sequentially outputting each other by a predetermined shift.

As shown in Figure 17A, the trigger signal input terminal SP of the first-level unit sub-circuit 1310 is directly connected to the external start pulse trigger signal; the trigger signal output terminal SPO of the first-level unit sub-circuit 1310 is connected to the second-level unit sub-circuit 1310 The trigger signal input terminal SP of the second-level unit sub-circuit 1310 is connected to the trigger signal input terminal of the third-level unit sub-circuit, and so on, the trigger signal output terminal SPO of the N-th unit sub-circuit 1310 is connected The trigger signal input terminal SP of the (N+1)th level unit sub-circuit. Only under the trigger of the pulse trigger signal, the unit sub-circuit can work and output signals.

It can be understood that the trigger signal output terminal of the last-level unit sub-circuit 1310 (such as the 36th level unit sub-circuit in this embodiment) is not connected to the trigger signal input terminals of other unit sub-circuits.

The working sequence of each touch drive electrode TX, isolation sub-electrode IX, clock control signal TX_CLK, pulse trigger signal SP is shown in Figure 19. After the pulse generator sends out the first pulse trigger signal, the first-level unit sub-circuit starts Send a signal to the touch drive electrode and isolator sub-electrode of the first group, and its frequency, phase, amplitude and clock control signal in the same time period are the same; after the first-level unit sub-circuit drive waveform ends, the first-level unit sub-circuit The circuit sends a second pulse trigger signal to the second-level unit sub-circuit, and then the second-level unit sub-circuit starts to touch the second group The driving electrode and the isolating sub-electrode send signals, and their frequency, phase, amplitude and clock control signal in the same period are the same; and so on, after the driving waveform of the N-th unit sub-circuit is completed, the N-th unit sub-circuit sends out the first N pulse trigger signals are sent to the (N+1)th level unit sub-circuit, and then the (N+1)th level unit sub-circuit starts to send signals to the (N+1)th group of touch drive electrodes and spacer sub-electrodes. The frequency, phase, amplitude and the clock control signal in the same period are the same.

The touch driving method of the OLED touch display panel of the present invention includes the following steps: providing a touch driving signal to at least a part of the touch electrode structure (such as a touch driving electrode), and receiving and receiving the touch driving signal. The isolation electrode layer corresponding to the touch electrode structure of at least a part of the signal provides an isolation electrical signal with the same frequency and substantially synchronization with the touch drive signal.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. The up, down, left, and right directions shown in the figures are only for ease of understanding, although the present invention has been described in detail with reference to the preferred embodiments. A person of ordinary skill should understand that the technical solution of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.

20: second substrate

30: Touch electrode structure

50: Isolation electrode layer

51: Isolated sub-electrode

301: Touch drive electrode

303: Touch sensing electrode

14: Cathode layer

Claims (22)

A touch display panel includes: a first substrate; a second substrate arranged opposite to the first substrate; a display electrode arranged on a side of the first substrate close to the second substrate; A control electrode structure, which is arranged between the display electrode and the second substrate or on the side of the second substrate away from the first substrate, the touch electrode structure includes a plurality of touch drive electrodes And a plurality of touch sensing electrodes insulated from the plurality of touch driving electrodes; the improvement lies in that it further includes an isolation electrode layer, which is arranged between the display electrodes and the touch electrode structure to prevent the The electrical signal of the display electrode interferes with the electrical signal of the touch electrode structure, and the isolation electrode layer includes a plurality of isolation sub-electrodes arranged in a one-to-one correspondence with the plurality of touch drive electrodes, and the electrical signal applied to each isolation sub-electrode The signal and the waveform of the electrical signal applied to the corresponding touch drive electrode have the same frequency and are basically synchronized. The touch display panel according to claim 1, wherein the phase of the electrical signal applied to each of the spacer sub-electrodes and the waveform of the electrical signal applied to the corresponding touch drive electrode are the same . The touch display panel according to claim 1, wherein each of the isolation sub-electrodes and the correspondingly configured touch drive electrode overlap correspondingly, have substantially the same shape and substantially the same size. The touch display panel according to claim 3, wherein the touch electrode structure is a double-layer mutual capacitance type, and the plurality of touch driving electrodes and the plurality of touch sensing electrodes are arranged in two different layers. The touch display panel according to claim 3, wherein the touch electrode structure is a single-layer mutual capacitance type, and the plurality of touch driving electrodes and the plurality of touch sensing electrodes are arranged in the same layer. The touch display panel according to claim 5, wherein the isolation electrode layer further includes a plurality of other isolation sub-electrodes respectively corresponding to the plurality of touch sensing electrodes, applied to the plurality of other isolation sub-electrodes The electrical signal is a DC voltage signal or a ground signal. The touch display panel of claim 1, wherein the touch display panel is an organic light-emitting diode (Organic Light-Emitting Diode, OLED) touch display panel, and the touch display panel further includes sequentially stacked A thin film transistor layer, an anode layer, an organic light-emitting layer, and a cathode layer on the first substrate, and the cathode layer is the electrode for display. A touch display panel includes: a first substrate; a second substrate arranged opposite to the first substrate; a display electrode arranged on a side of the first substrate close to the second substrate; A control electrode structure, which is arranged between the display electrode and the second substrate or on the side of the second substrate away from the first substrate, and the touch electrode structure is a single-layer self-capacitance type It also includes a plurality of touch electrodes arranged at intervals; the improvement is that it also includes an isolation electrode layer, which is arranged between the display electrodes and the touch electrode structure to prevent electrical signal interference of the display electrodes For the electrical signal of the touch electrode structure, at least a part of the isolation electrode layer and at least a part of the plurality of touch electrodes are configured correspondingly, and the electrical signal applied to the isolation electrode layer is different from that applied to the correspondingly configured touch The waveforms of the electrical signals of the electrodes have the same frequency and are basically synchronized. The touch display panel according to claim 8, wherein the phases of the waveforms of the electrical signal applied to the isolation electrode layer and the electrical signal applied to the touch electrode are the same. The touch display panel according to claim 8, wherein the isolation electrode layer is a continuous whole layer, which overlaps with all the plurality of touch electrodes correspondingly. The touch display panel according to claim 8, wherein the isolation electrode layer includes a plurality of isolation sub-electrodes arranged at intervals, and each isolation sub-electrode is configured corresponding to at least one touch electrode. The touch display panel according to claim 11, wherein each of the isolation sub-electrodes and the corresponding at least one touch electrode overlap correspondingly, have substantially the same shape and substantially the same size. The touch display panel according to claim 8, wherein the touch display panel is an OLED touch display panel, and the touch display panel further includes a thin film transistor layer sequentially laminated on the first substrate, An anode layer, an organic light-emitting layer, and a cathode layer, and the cathode layer is the electrode for display. A touch driving method for driving the touch display panel according to any one of request items 1 to 13, the touch driving method comprising: providing a touch driving signal to at least a part of the touch electrode structure Providing the isolation electrode layer corresponding to the touch electrode structure that receives at least a part of the touch drive signal with an isolated electrical signal that has the same frequency and is substantially synchronized with the touch drive signal. A first touch drive circuit for driving the touch display panel according to any one of claim items 1 to 7, the first touch drive circuit includes a multi-level unit sub-circuit, each level of the unit sub-circuit and a corresponding configuration The pair of touch drive electrodes and the isolating sub-electrodes are configured correspondingly; each level of the unit sub-circuit includes: a trigger signal input terminal for connecting a trigger signal; a timing input terminal for connecting an external clock control signal; high level The input terminal is used to connect an external high-level touch signal; the low-level input terminal is used to connect an external fixed voltage signal or a ground signal; the touch drive signal output terminal is used to output to the touch drive electrode Touch driving signal; An isolation signal output terminal for outputting to the isolator sub-electrode an isolation signal that is at the same frequency and substantially synchronous with the touch drive signal; and a trigger signal output terminal for outputting the trigger signal to the next-level unit sub-circuit; The signal generation module is used to output a signal with the same frequency and basically synchronization with the clock control signal under the control of the clock control signal and the high-level touch signal in the first period, and output all the signals in the second period The fixed voltage signal or the ground signal. A second touch drive circuit configured to correspond to the first touch drive circuit described in claim 15 and electrically connected. The improvement lies in that the second touch drive circuit includes: a timing generator for To generate and send the clock control signal to the timing input terminal of the unit sub-circuit; a pulse generator to generate and send a pulse trigger signal to the trigger signal input terminal of the first-level unit sub-circuit; and high The level generator is used to generate and send the high-level touch signal to the high-level input terminal of the unit sub-circuit. The second touch drive circuit according to claim 16, wherein the second touch drive circuit further includes a low-level generator for generating and sending the fixed voltage signal or the ground signal to the The low-level input terminal of the unit sub-circuit. The second touch drive circuit according to claim 16, wherein the second touch drive circuit is further provided with a touch sensing receiving circuit for electrically connecting the touch sensing electrodes and receiving touch sensing signals . The second touch drive circuit according to claim 16, wherein the second touch drive circuit is directly disposed on the touch display panel or is a product connected to the touch display panel through a flexible circuit board. Body circuit (Integrated Circuit, IC). A touch drive circuit, which is used to drive the touch control according to any one of request items 1 to 7 The improvement of the display panel is that the touch drive circuit includes a first touch drive circuit and a second touch drive circuit electrically connected to the first touch drive circuit, and the first touch drive circuit includes a multi-level unit Sub-circuit, each level of unit sub-circuit is correspondingly configured with a pair of correspondingly configured touch drive electrodes and isolation sub-electrodes; each level of unit sub-circuit includes: a trigger signal input terminal for connecting a trigger signal; a timing input terminal for To connect to an external clock control signal; a high-level input terminal to connect to an external high-level touch signal; a low-level input terminal to connect to an external fixed voltage signal or ground signal; a touch drive signal output terminal , For outputting a touch drive signal to the touch drive electrode; an isolation signal output terminal, for outputting an isolation signal of the same frequency and substantially synchronous with the touch drive signal to the isolator sub-electrode; trigger signal output terminal , Used to output the trigger signal to the next-level unit sub-circuit; and a signal generation module, used to output and the clock under the control of the clock control signal and the high-level touch signal in the first period The control signal is a signal with the same frequency and is basically synchronized, and outputs the fixed voltage signal or the ground signal in the second period; the second touch drive circuit includes: a timing generator for generating and sending the clock control signal To the timing input terminal of the unit sub-circuit; a pulse generator for generating and sending a pulse trigger signal to the trigger signal input terminal of the first-level unit sub-circuit; and a high-level generator for generating And sending the high-level touch signal to the high-level input terminal of the unit sub-circuit. The touch drive circuit according to claim 20, wherein the second touch drive circuit further includes a low-level generator for generating and sending the fixed voltage signal or the ground signal to all The low-level input terminal of the unit sub-circuit. A touch drive circuit for the touch display panel according to any one of request items 1 to 13, which is used for sending a touch drive signal to the touch electrode structure and sending a touch drive signal to the touch drive signal according to the touch drive signal. The isolation electrode layer sends required electrical signals.

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