TW201939246A - Touch display panel, touch driving circuit, 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 driving circuit and touch driving method

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

The thin display device is one of the development trends of the display industry. An OLED display device is taken as an example for description. As shown in FIG. 1A, a conventional OLED display device generally includes an upper substrate 101 and a lower substrate 102 that are spaced and oppositely disposed; the lower substrate 102 is close to the surface of the upper substrate 101. A thin film transistor layer 11, an anode layer 12, an organic light emitting layer 13, and a cathode layer 14 are stacked in this order from bottom to top. A spacer 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 by being squeezed by the upper substrate 101. The upper substrate 101 is mainly for protection. effect. An electrode structure on one side of the spacer 80 is disposed on the upper substrate 101, and an electrode structure on the other side of the spacer 80 opposite to the spacer 80 is disposed on the lower substrate 102. There are currently two 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 called an on-embedded (on- cell type), as shown in FIG. 1A; the other is to set the touch electrode structure 30 on the surface of the upper substrate 101 near the lower substrate 102, which is generally referred to as in-cell type in the industry, as shown in FIG. 1A. 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 OLED display device with integrated touch function The smaller and smaller, the signal fluctuation on the display electrode interferes with the signal of the touch electrode, resulting in a greater and 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 signals with the touch electrode signals.

A touch display panel includes: a first substrate; a second substrate opposite to the first substrate; a display electrode disposed on a side of the first substrate close to the second substrate; A control electrode structure is provided between the display electrode and the second substrate or on a side of the second substrate away from the first substrate, and 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; and an isolation electrode layer provided between the display electrode and the touch electrode structure to prevent the display electrode from being electrically charged. 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 one-to-one correspondence with the plurality of touch driving electrodes. The electrical signals applied to each isolation sub-electrode and The waveforms of the electrical signals of the corresponding touch driving electrodes are the same frequency and are basically synchronous.

The present invention also provides a touch display panel including: a first substrate; a second substrate disposed opposite to the first substrate; a display electrode disposed on the first substrate near the second substrate One side; a touch electrode structure disposed between the display electrode and the second substrate or on a side of the second substrate away from the first substrate, the touch electrode structure is single The layer is self-capacitance and includes a plurality of touch electrodes arranged at intervals; and an isolation electrode layer provided between the display electrode and the touch electrode structure to prevent the electric signal of the display electrode from interfering with the signal. In the electrical signal of the touch electrode structure, the waveform of the electrical signal applied to the isolation electrode layer and the waveform of the electrical signal applied to the touch electrode are substantially the same.

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

The present invention also provides a first touch driving circuit for the above touch display panel. The first touch driving circuit includes multi-level unit sub-circuits, each of which corresponds to a corresponding pair of touch-control driving electrodes and isolating sub-electrodes. Configuration; each level 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; a high-level input terminal for connecting an external high-level touch signal Low-level input terminal for connecting external fixed voltage signal or ground signal; Touch drive signal output terminal for outputting touch drive signal to touch drive electrode; Isolation signal output terminal for isolating sub-electrode Outputs an isolated signal at the same frequency as the touch drive signal and is basically synchronized; a trigger signal output terminal for outputting a trigger signal to the next-level unit sub-circuit; and a signal generation module for controlling the signal and the Under the control of the level touch signal, a signal with the same frequency as the clock control signal and basically synchronized is output, and a fixed voltage signal is output in the second period. Or ground signal.

The present invention also provides a second touch driving circuit for the touch display panel, which is configured to be electrically connected to the first touch driving circuit, and the second touch driving circuit includes: A generator for generating and sending a 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; The flat 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 driving circuit for the above touch display panel, which includes a first touch driving circuit and a second touch driving circuit electrically connected to the first touch driving circuit. The touch driving circuit includes multi-level unit sub-circuits. Each level of the unit sub-circuit is correspondingly configured with a corresponding pair of touch-control driving electrodes and isolation sub-electrodes. Each level of the unit sub-circuit includes: a trigger signal input terminal for connecting a trigger signal. ; Timing input terminal for connecting external clock control signal; high-level input terminal for connecting external high-level touch signal; low-level input terminal for connecting external fixed voltage signal or ground signal; Touch drive signal output terminal for outputting touch drive signals to touch drive electrodes; Isolation signal output terminal for outputting isolated signals with the same frequency as the touch drive signals to the isolator sub-electrode; and trigger signal output terminals For outputting a trigger signal to the next-level unit sub-circuit; and a signal generating module for controlling the clock and the high level in the first period Under the control of the control signal, a signal having the same frequency as the clock control signal and basically synchronized is output, and a fixed voltage signal or a ground signal is output in the second period. The second touch driving circuit includes: a timing generator for generating and sending a clock A 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 transmitting The high-level touch signal is given to the high-level input terminal of the unit sub-circuit.

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

In this case, an isolation electrode layer is added between the touch electrode structure and the display electrode. The shape of the isolation electrode layer is basically the same as the shape of the touch drive electrode, and its size is basically equivalent to the size of the touch drive electrode. If the driving signals are at the same frequency and are basically synchronous, they become isolated electrode layers for charging and discharging. Because the touch driving electrodes are the same as the isolating sub-electrode driving signals, they do not need to be charged or discharged, and the frequency of the touch driving electrodes will be increased. . Increasing the frequency of touch drive electrodes can increase the range of selectable operating frequencies for touch sensing circuits. When encountering external interference signals, find a working frequency far from the frequency of the interference signals, 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.

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 set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

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

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

Here, basically the same or substantially the same includes the cases of complete agreement and basic agreement, in which the basic agreement is slightly larger or smaller or slightly different within the allowable range. The same shape includes the isolating sub-electrode and the touch driving electrode having the same main shape, allowing differences in details. Subsequent embodiments of the description list some embodiments belonging to the "substantially the same / equivalent" of the present invention to help understanding, but it can be understood that these embodiments are not exhaustive.

The touch display panel according to the present invention is a display panel with a touch function. The display panel may be an in-cell touch display device in which a touch electrode structure is embedded in a display structure for displaying an image, or may be configured independently. An in-cell touch display panel outside the display structure for displaying images. The display structure for displaying images may be a self-emitting display structure, such as an organic light emitting diode display panel (OLED), or a non-self-emitting display panel, such as a liquid crystal display panel (LCD).

The following describes the specific embodiment with an 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 oppositely disposed. The OLED touch display panel 100 further includes a thin-film transistor layer 11 and an anode layered on the surface of the first substrate 10 near the second substrate 20 and sequentially in a direction gradually 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 further include other components, and such components, such as an electron transmission layer and a hole transmission layer, may be disposed 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 be organic. 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 package substrate for packaging an OLED display structure in an OLED display panel, and a 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 implementing a touch function is further provided between the cathode layer 14 and the second substrate 20. In order to effectively prevent the electrical signals of the display electrodes (such as the cathode layer 14) from causing interference with the signals 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 isolated electrode layer 50, the touch electrode structure 30, and the cathode layer 14 are all electrically insulated. In FIG. 2, only the arrangement of the three layers is simply shown, and the insulation that isolates them from each other is not shown. 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 touch driving electrodes disposed in a stack. Layer 31 and 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, the arrangement positions of the touch driving electrode layer 31 and the touch sensing electrode layer 33 are simply shown in FIG. 2 and FIG. 3, and an insulating layer that insulates them from each other is not shown.

As shown in FIG. 3, the cathode layer 14 is a continuous monolithic electrode layer formed on the entire display area of the display panel 100. The touch driving electrode layer 31 is discontinuous and includes a plurality of touch driving electrodes 311 arranged at intervals. Each of the touch driving electrodes 311 extends in a strip shape along the first direction D1. 311 is arranged at intervals along the second direction D2 (intersects the first direction D1). The touch sensing electrode layer 33 is discontinuous, and includes a plurality of touch sensing electrodes 331 arranged at intervals. 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 isolated electrode layer 50 is basically the same as the pattern of the touch driving electrode layer 31 (touch driving electrode layer). The isolated electrode layer 50 is discontinuous and includes spaced-apart electrodes. The plurality of isolation sub-electrodes 51 each extend in a strip shape along the first direction D1, and the plurality of isolation sub-electrodes 51 are arranged at intervals along the second direction D2. In this embodiment, each of the isolation sub-electrodes 51 and a touch-control driving electrode 311 are configured correspondingly, and each of the isolation sub-electrodes 51 and its corresponding touch-control driving electrode 311 (touch-control driving electrode) are basically the same in shape and size. . The "corresponding configuration" in this case is the corresponding overlap.

Among them, the "substantially the same shape" in this case means that the two shapes are completely the same or slightly different within the allowed range. The same shape includes the isolating sub-electrode 51 and the touch driving electrode 311 of the corresponding configuration having the same main shape, and a difference in details of the shape is allowed. For example, it may be a main shape with substantially the same size but with a slight difference in the shape of the outline; for example, the main shapes of both are roughly rectangular, and 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 contour edges of the two are separated by a gap of an allowable size range. The "substantially equivalent size" in this case means that the two dimensions are completely equal or the dimensions are slightly larger or smaller. In short, the isolating sub-electrode 51 and the touch driving electrode 311 are basically the same in shape and the same size, which can ensure that the signal on the cathode layer 14 cannot reach the touch driving electrode 311 through the gap between two adjacent isolating sub-electrodes 51. .

As shown in FIG. 4, each touch driving electrode 311 is defined as TX1, TX2, TX3, ... TXn, and each isolation sub-electrode 51 corresponding to each touch driving electrode 311 is defined as IX1, IX2, IX3, ... IXn. Please refer to FIG. 4, which only illustrates driving waveforms of the touch electrode structure 30 and the isolation sub-electrode 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 signals detected from the touch sensing electrodes 331 are detected, and the difference in capacitance changes 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 to the signal of the touch electrode structure 30, the isolation sub-electrode 51 configured 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 has the same frequency as the waveform of the electrical signal applied to the touch drive electrodes 311 (touch drive electrodes) correspondingly configured, and is substantially synchronized. "Basically synchronous" in this case means that the phases of the two waveforms are the same or there are very slight differences in phase, such as microseconds or less. In addition, the amplitude of the electrical signal applied to the isolation sub-electrode 51 and the waveform of the electrical signal applied to the corresponding touch drive electrode 311 may be the same or different. In this embodiment, the waveform is not limited to the square wave shown in FIG. 4, and may be a trapezoidal wave, a sine wave, or the like.

In this way, due to the shielding effect of the isolating sub-electrode 51, the display signals loaded on the cathode layer 14 will not interfere with the touch driving electrode 311, nor will it interfere with the touch sensing electrode 331.

Comparative Example 1 Compared with the existing OLED display panel, when the touch drive electrode is directly disposed above the cathode layer, due to the presence of parasitic capacitance, the touch drive electrode needs to charge and amplify the charge when driving the square wave, plus the screen body. Due to the influence of resistance and capacitance, the operating frequency of the touch driving 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 driving electrode 311 and the cathode layer 14; the isolation electrode layer 50 includes a plurality of spacer sub-electrodes arranged at intervals. 51, the isolating sub-electrode 51 and the touch driving electrode 311 are arranged in a one-to-one correspondence, and the driving signal of the isolating sub-electrode 51 and the driving signal of the corresponding touch-driving driving electrode 311 are at the same frequency and are basically synchronized, compared with In Comparative Example 1, the isolation sub-electrode 51 is switched to charge and discharge, and the touch driving electrode 311 does not need to be charged or amplified, so the frequency of the touch driving electrode 311 is increased. Increasing the frequency of the touch driving electrode 311 can make the optional operating frequency range of the touch sensing circuit larger. When encountering external interference signals, find a working frequency far away from the frequency of the interference signal, which can effectively reduce its interference. Therefore, a wide range of optional operating frequencies can improve the anti-interference ability of the touch sensing circuit.

Comparative Example 2 Compared with another OLED touch display panel, the touch structure is a double-layer capacitive structure, and a continuous and integrated isolation electrode layer is provided between the touch driving electrode and the cathode layer. However, due to such an isolated electrode layer structure, it is assumed that if an isolated signal with the same frequency as the touch scan signal is loaded into the isolated electrode layer, for other touch drive electrodes that are not loaded with a touch drive 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 driving electrode 311 and the cathode layer 14; the isolation electrode layer 50 includes a plurality of spacer sub-electrodes arranged at intervals. 51, the isolating sub-electrode 51 and the touch driving electrode 311 are arranged in a one-to-one correspondence, and the driving signal of the isolating sub-electrode 51 and the driving signal of the corresponding touch-driving driving electrode 311 are at the same frequency and are basically synchronized, compared with In Comparative Example 2, such a structure can avoid noise interference caused by the isolated signal on the touch driving electrodes that are not loaded with the touch driving signals.

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

Embodiment 2 Referring to FIG. 5, an OLED touch display panel 200 according to a second embodiment of the present invention includes a first substrate 10 and a second substrate 20 spaced apart from each other. A thin film transistor layer 11, an anode layer 12, an organic light emitting layer 13, and a cathode layer 14 are sequentially stacked on a surface of the first substrate 10 near the second substrate 20 in a direction gradually away from the first substrate 10. . A touch electrode structure 30 is further disposed between the cathode layer 14 and the second substrate 20. In order to effectively prevent the electrical signals of the display electrodes (such as the cathode layer 14) from causing interference with the signals 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 isolated electrode layer 50, the touch electrode structure 30, and the cathode layer 14 are all electrically insulated. In FIG. 5, only the arrangement positions of the three layers are simply illustrated, and the insulation that insulates them from each other is not shown. Floor. For ease of expression, in each embodiment, the same component name uses the same component number.

In this embodiment, as shown in FIG. 6, the touch electrode structure 30 is 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 disposed 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 (which intersects the first direction D1) is electrically connected to form one touch The series of control sensing electrodes 303, wherein the series of touch driving electrodes 301 and the series of touch sensing electrodes 303 are insulated from each other and intersect.

As shown in FIG. 6, the patterns of the isolated electrode layer 50 and the touch electrode structure 30 are basically the same. The isolated electrode layer 50 is discontinuous and includes a plurality of isolated sub-electrodes 51 disposed on the same layer. A row of isolation sub-electrodes 51 in the first direction D1 is electrically connected to form a row and series of the isolation sub-electrodes 51, and a row of isolation sub-electrodes 51 in the second direction D2 is electrically connected to form a series of the isolator sub-electrodes 51, wherein The rows and columns of the sub-electrodes 51 and the columns and columns of the isolating sub-electrodes 51 are insulated from each other and intersect. In this embodiment, each row and column of the isolation sub-electrode 51 is correspondingly arranged (that is, correspondingly overlaps) with a series of one touch driving electrode 301, and each of the isolation sub-electrodes in one row and series of the isolation sub-electrode 51 51 is correspondingly configured (that is, correspondingly overlaps) with one touch driving electrode 301 in the series of corresponding touch driving electrodes 301, and the shapes are basically the same and the sizes are substantially the same. Each of the columns and columns of the isolation sub-electrode 51 is correspondingly arranged (that is, correspondingly overlaps) with a series of one touch-sensing electrode 303, and each of the columns of the isolation sub-electrode 51 and each corresponding column of the isolation sub-electrode 51 and the corresponding One of the touch-sensing electrodes 303 in the series of touch-sensing electrodes 303 is correspondingly configured (that is, correspondingly overlaps) and has the same shape and the same size. In short, the isolated electrode layer 50 and the touch electrode structure 30 are basically the same shape and the same size, which is to ensure that the signals on the cathode layer 14 cannot pass through the two adjacent sub-electrodes 51. The gap between them reaches the touch electrode structure 30.

As shown in FIG. 4, the series of the touch driving electrodes 311 are defined as TX1, TX2, TX3,... TXn, and the columns of the isolation sub-electrode 51 corresponding to the series of the touch driving electrodes 311 are defined. The strings are IX1, IX2, IX3, ... IXn. Each series of the touch driving electrodes 311 is sequentially loaded with a touch driving signal. In order to effectively avoid the interference of the signal of the cathode layer 14 and the signal of the touch electrode structure 30, it is also required that, as shown in FIG. 4, the electrical signals applied to the rows and columns of the isolation sub-electrode 51 and the touch applied to the corresponding configuration thereof The waveforms of the serial electrical signals of the drive electrodes 301 have the same frequency and are substantially synchronized. The series of electrical signals applied to the isolation sub-electrode 51 is a DC voltage signal or a ground signal. In addition, the amplitudes of the waveforms of the electrical signals applied to the rows and columns of the isolation sub-electrodes 51 and the electrical signals applied to the series of touch drive electrodes 301 arranged correspondingly 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, the touch structure is a single-layer mutual-capacitance structure, and a continuous whole piece of isolated electrode layer is provided between the touch driving electrode and the cathode layer. However, Due to such an isolated electrode layer structure, when an isolation signal having the same frequency as the touch driving signal is loaded, the distance between the isolated electrode layer and the touch sensing electrode is close, and the area directly opposite is large, resulting in a very high mutual capacitance reference value (CM). Large, which affects 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 driving electrode 311 and the cathode layer 14; the isolation electrode layer 50 includes a plurality of spacer sub-electrodes arranged at intervals. 51. The rows and columns of the isolation sub-electrodes 51 are arranged in a one-to-one correspondence with the series of the touch driving electrodes 301. The columns and columns of the isolation sub-electrodes 51 are arranged in a one-to-one correspondence with the series of the touch sensing electrodes 303, and the sub-electrodes are isolated. The driving signals of the row and column of 51 and the driving signals of the corresponding series of touch driving electrodes 301 are at the same frequency and are basically synchronized. Compared to Comparative Example 3, this structure uses the isolation electrode layer It is divided and the isolating sub-electrode under the touch sensing electrode 303 is connected to a constant voltage. In this way, the mutual capacitance reference value is small, thereby improving the detection accuracy.

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

Wherein, the arrangement of the isolated electrode layer 50 and the touch electrode structure 30 includes any one of the following: (1) The isolated electrode layer 50 and the touch electrode structure 30 are both disposed on the first substrate 10 At this time, a spacer (not shown) is disposed between the touch electrode structure 30 and the second substrate 20; (2) The isolation electrode layer 50 is disposed on the first substrate 10, so The touch electrode structure 30 is disposed on a surface of the second substrate 20 near the first substrate 10. At this time, a spacer (not shown) is disposed on the isolation electrode layer 50 and the touch electrode structure 30. between. (3) The isolation electrode layer 50 and the touch electrode structure 30 are both disposed on a surface of the second substrate 20 near the first substrate 10, and a gasket (not shown) is disposed on the surface Between the isolated electrode layer 50 and the cathode layer 14.

Embodiment 3 Please continue to refer to FIG. 5. The cross-sectional view of the OLED touch display panel 300 according to the third embodiment of the present invention is the same as the cross-sectional view of the OLED touch display panel 200 according to the second embodiment shown in FIG. 5. It also includes a first substrate 10 and a second substrate 20 that are spaced apart from each other; a surface of the first substrate 10 near the second substrate 20 is sequentially stacked in a direction gradually away from the first substrate 10 and is provided with a thin film The crystal layer 11, the anode layer 12, the organic light emitting layer 13, and the cathode layer 14; a touch electrode structure 30 is further provided between the cathode layer 14 and the second substrate 20; An isolation electrode layer 50 is further provided between the cathode layers 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 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 disposed at intervals on the same layer.

In this embodiment, as shown in FIGS. 7 to 12, the pattern of the isolation electrode layer 50 may be adjusted and set 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 FIG. 7 to FIG. 9), the pattern of the isolation electrode layer 50 may be specifically set. One of the following.

(1.1) As shown in FIG. 7, the isolated electrode layer 50 may be a continuous one-piece electrode layer formed on the entire display area of the display panel 300 and covers the plurality of touch electrodes 302.

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

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

In this embodiment, as shown in FIG. 10 to FIG. 12, when the plurality of touch electrodes 302 includes a plurality of pairs of triangular electrodes, two triangular electrodes spaced apart (independent) in each pair of triangular electrodes are put together into one. A long rectangle. In this case, the pattern of the isolated electrode layer 50 may be specifically set to one of the following.

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

(2.2) As shown in FIG. 11, the isolated electrode layer 50 is discontinuous, and includes a plurality of spaced-apart isolating sub-electrodes 51. Each of the isolating sub-electrodes 51 is arranged in a triangle shape to form a triangular touch electrode 302 one by one. Corresponding configuration; each of the triangular isolation sub-electrodes 51 and its corresponding touch electrode 302 overlap, have the same shape, and have the same size.

(2.3) As shown in FIG. 12, the isolating electrode layer 50 is discontinuous, and includes a plurality of isolating sub-electrodes 51 arranged at intervals. Each isolating sub-electrode 51 is corresponding to at least one pair of triangular electrodes. The electrode 51 is provided in a long rectangular shape, correspondingly overlaps with at least a pair of triangular electrodes corresponding to the electrode 51, has substantially the same shape, and has substantially the same size. As shown in FIG. 12, each of the isolation sub-electrodes 51 is disposed corresponding to a pair of triangular electrodes.

It can be understood that the shape of each touch electrode 302 is not limited to the rectangles and triangles shown in FIG. 7 to FIG. 12, and may 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 simultaneously (loaded with touch driving signals simultaneously). As shown in FIG. 13, under this condition, the waveform of the electrical signal applied to the isolated electrode layer 50 (isolated sub-electrode 51) and the waveform of the electrical signal applied to the touch electrode 302 are the same frequency and are substantially synchronous. As shown in Figure 13. In addition, the amplitude of the electrical signal applied to the isolated electrode layer 50 (isolated sub-electrode 51) and the waveform of the electrical signal applied to the touch electrode 302 may be the same or different. In this embodiment, the waveform is not limited to the square wave shown in FIG. 13, and may be a trapezoidal wave, a sine wave, or 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 (the touch drive signals are sequentially loaded). In this case, the isolation electrode layer 50 must be discontinuous and It includes a plurality of spaced-apart isolating sub-electrodes 51, and each of the isolating sub-electrodes 51 is correspondingly arranged to at least one touch electrode 302. In this condition, the waveform of the electrical signal applied to the isolation sub-electrode 51 and the waveform of the electrical signal applied to the corresponding touch electrode 302 are at the same frequency and are substantially synchronized.

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

It can be understood that the isolated electrode layer is not limited to be used in an OLED touch display panel, and can also be used in an LCD touch display panel. For example, the isolated electrode layer is provided between a touch electrode structure and a display electrode (such as a common electrode). Electrode layer) to prevent signals from display electrodes (such as the common electrode layer) from interfering with the touch electrode structure.

Please refer to FIG. 16. In this embodiment, the OLED touch display panel defines a touch display area 110 and a border area 120 surrounding the touch display area 110. The touch driving electrodes TX and the isolation sub-electrodes IX are disposed in the touch display area 110, a touch driving circuit 130 is provided in the frame area 120, and the touch driving circuit 130 is electrically connected to the touch driving Electrode TX and isolating sub-electrode IX. In this embodiment, the signal applied to the isolation electrode layer (for example, the isolation sub-electrode IX) and the touch driving signal at the same frequency, the same phase, and the same amplitude will be described as an example, and the touch driving electrode TX and the isolation sub-electrode IX will be described separately. There are 36 (named TX1, TX2, TX3 ... TX36 respectively; IX1, IX2, IX3 ... IX36) and one-to-one corresponding configuration, and 18 touch sensing electrodes RX (named RX1, RX2, RX3 ... RX18 respectively) are Example for illustration. In FIG. 16, it is better to show the touch driving electrodes TX and the isolation sub-electrodes IX at the same time. The corresponding configuration of the touch driving electrodes TX and the isolation sub-electrodes IX does not completely overlap; in fact, the corresponding configuration of the touch driving electrodes TX and isolating sub-electrodes IX should be overlapped.

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

It can be understood that the driving waveforms of the touch driving electrodes TX and the isolation 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 each touch driving electrode and the isolation sub-electrodes through the circuit in the panel Waveform. In this embodiment, the first touch driving circuit 131 is configured to generate and provide a touch driving signal for touch to the touch driving electrode TX and an isolation signal to the isolating sub-electrode IX; the second touch driving circuit 133 generates a first Various control signals required for the touch driving circuit 131 to work include clock control signals, start pulse trigger signals, high-level touch signals, and fixed voltage signals. The start pulse trigger signal is used to trigger the first touch driving circuit 131. In this embodiment, at the falling edge of the start pulse trigger signal, the first touch driving circuit 131 is triggered to start outputting a touch driving signal and an isolation signal. The high-level touch signal is used to control the first touch-control driving circuit to output a high-level electrical signal at the same frequency as the touch-control driving signal and the isolation signal in synchronization with the clock signal in cooperation with the clock signal. The fixed voltage signal is much smaller than the high-level touch signal, and is used to pull down the level of the signal output by the first touch driving circuit.

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

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

As shown in FIG. 16 and FIG. 17A, the first touch driving circuit 131 receives a control signal from the second touch driving circuit 133, and electrically connects and outputs a signal to the plurality of touch driving electrodes and the touch control electrode. A plurality of isolated sub-electrodes. As shown in FIG. 17A, the first touch driving circuit 131 includes a multi-level unit sub-circuit 1310. Each level of the sub-circuit 1310 is correspondingly configured with a touch driving electrode and an isolating sub-electrode corresponding to the touch-control driving electrode. The multi-level unit sub-circuit 1310 sequentially outputs touch driving signals and isolation signals that are at the same frequency and substantially synchronized with the clock signal, and the touch-control driving signals and isolation signals output by adjacent unit sub-circuits 1310 differ by a predetermined displacement. The touch driving signals and the isolation signals output to the plurality of touch driving electrodes and the isolating sub-electrodes are also at the same frequency and are basically synchronized. In this embodiment, the output waveforms of the touch driving signal and the isolation signal are determined by the clock control signal, and change with 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 a start pulse trigger signal output by a pulse generator in this embodiment); a timing input terminal for Connect to an external clock control signal TX-CLK (such as the clock control signal output by the timing generator in this embodiment); a high-level input terminal for connecting an external high-level touch signal TX-H (such as this implementation The high-level touch signal output by the high-level generator in the example); The low-level input terminal is used to connect an external fixed voltage signal TX-L (such as the output of the low-level generator in this embodiment is less than High-level touch signal TX-H fixed voltage signal or ground signal); Touch drive signal output terminal for outputting touch drive signal to touch drive electrode TX; Isolation signal output terminal for isolate sub-electrode IX outputs a signal that is at the same frequency as the touch drive signal and is basically synchronized; a trigger signal output terminal for outputting a trigger signal SPO to the next-level unit sub-circuit (such as the pulse trigger signal output by the pulse generator in this embodiment) ; And a signal generating module 1311 for outputting a high-level signal synchronized with the clock control signal at the same frequency under the control of the clock control signal TX-CLK and the high-level touch signal TX-H in the first period; In the second period, a fixed voltage signal or a ground signal is output. The multi-level signal generating module of the first touch driving circuit may have a circuit structure functioning as a displacement register, so that the touch driving signals / isolation signals are generated in a manner of being sequentially output different from each other by a predetermined displacement.

As shown in FIG. 17A, the trigger signal input terminal SP of the first-level unit sub-circuit 1310 is directly connected to an 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. Trigger signal input terminal SP; the trigger signal output terminal 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 S10 of the N-level unit sub-circuit 1310 is connected The trigger signal input terminal SP of the (N + 1) th unit sub-circuit. Only under the trigger of the pulse trigger signal, the unit sub-circuit can work and output the signal.

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

The operating timings of the touch driving electrodes TX, the isolation sub-electrodes IX, the clock control signal TX_CLK, and the pulse trigger signal SP are shown in FIG. 19. After the pulse generator sends the first pulse trigger signal, the first-level unit sub-circuit starts. Send signals to the touch driving electrodes and the isolating sub-electrode of the first group, the frequency, phase, amplitude and clock control signal of the same period are the same; after the driving waveform of the first-level unit sub-circuit is over, the first-level unit sub- 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 send signals to the second group of touch driving electrodes and the isolating sub-electrode, its frequency, phase, amplitude, and within the same period The clock control signal is the same; and so on, after the driving waveform of the Nth unit sub-circuit is over, the Nth unit subcircuit sends an Nth pulse trigger signal to the (N + 1) th unit subcircuit, and then the The (N + 1) -level unit sub-circuit starts to send signals to the touch driving electrodes and the isolating sub-electrode of the (N + 1) -th group, and its frequency, phase, amplitude, and clock control signals within the same period Are the same.

The touch driving method of the OLED touch display panel of the present invention includes the steps of: 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 The isolated electrode layer corresponding to the touch electrode structure of at least a part of the signal provides an isolated electrical signal having the same frequency and substantially synchronous with the touch driving signal.

The above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. The up, down, left, and right directions appearing in the illustration are only for easy understanding. Although the present invention is described in detail with reference to the preferred embodiments, Those 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.

100, 200, 300‧‧‧OLED touch display panels

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‧‧‧isolated electrode layer

31‧‧‧Touch driving electrode layer

33‧‧‧Touch sensing electrode layer

311, 301, TX‧‧‧touch driving electrode

331, 303, RX‧‧‧touch sensing electrode

51 、 IX‧‧‧Isolated sub-electrode

302, 103‧‧‧Touch electrodes

110‧‧‧Touch display area

120‧‧‧ border area

130‧‧‧touch driving circuit

131‧‧‧The first touch driving circuit

133‧‧‧Second touch driving 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 structures of two conventional OLED touch display panels.

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

FIG. 3 is a partial schematic diagram of the OLED touch display panel shown in FIG. 2, which is a perspective view illustrating a configuration of a touch structure and an isolated electrode layer of the OLED touch display panel.

FIG. 4 is a waveform diagram of a driving signal applied to the isolation sub-electrode and the touch driving electrode.

5 is a schematic cross-sectional structure diagram 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 is a schematic perspective view illustrating another configuration of a touch structure and an isolated electrode layer of the OLED touch display panel.

7 is a partial schematic diagram of a first configuration of a touch structure and an isolated electrode layer of an OLED touch display panel according to a third embodiment.

FIG. 8 is a partial schematic diagram of a second configuration of a touch structure and an isolated electrode layer of an OLED touch display panel according to a third embodiment.

FIG. 9 is a partial schematic view of a third configuration of a touch structure and an isolated electrode layer of an OLED touch display panel according to a third embodiment.

FIG. 10 is a partial schematic diagram of a fourth configuration of a touch structure and an isolated electrode layer of an OLED touch display panel according to a third embodiment.

11 is a partial schematic diagram of a fifth configuration of a touch structure and an isolated electrode layer of an OLED touch display panel according to a third embodiment.

FIG. 12 is a partial schematic diagram of a sixth configuration of a touch structure and an isolated electrode layer of an OLED touch display panel according to a 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 present invention.

15 is a schematic cross-sectional view of an OLED touch display panel according to a fifth embodiment of the present 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 module of a second touch driving circuit of a touch driving circuit according to a preferred embodiment of the present invention.

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

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

Claims (22)

A touch display panel includes: a first substrate; a second substrate opposite to the first substrate; a display electrode disposed on a side of the first substrate close to the second substrate; A control electrode structure is provided between the display electrode and the second substrate or on a side of the second substrate away from the first substrate, and 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 is: further comprising an isolation electrode layer disposed between the display electrode and the touch electrode structure to prevent the touch electrode The electrical signal of the display electrode interferes with the electrical signal of the touch electrode structure. The isolation electrode layer includes a plurality of isolation sub-electrodes arranged one-to-one corresponding to the plurality of touch driving electrodes. The signal and the waveform of the electric signal applied to the touch driving electrode corresponding to the signal are at the same frequency and are basically synchronized. The touch display panel according to claim 1, wherein the phase of the waveform of the electrical signal applied to each of the isolated sub-electrodes and the waveform of the electrical signal applied to the touch drive electrode configured correspondingly is the same. The touch display panel according to claim 1, wherein each of the isolation sub-electrodes and a touch drive electrode corresponding to the corresponding sub-electrode overlap, have substantially the same shape, and have 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 disposed on different two 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 disposed on a same layer. The touch display panel according to claim 5, wherein the isolated electrode layer further includes a plurality of additional isolation sub-electrodes configured corresponding to the plurality of touch sensing electrodes, respectively, and is applied to the plurality of additional isolation sub-electrodes. The electrical signal is a DC voltage signal or a ground signal. The touch display panel according to claim 1, wherein the touch display panel is an OLED touch display panel, and the touch display panel further includes a thin film transistor layer sequentially stacked on the first substrate, An anode layer, an organic light emitting layer, and a cathode layer, wherein the cathode layer is the display electrode. A touch display panel includes: a first substrate; a second substrate opposite to the first substrate; a display electrode disposed on a side of the first substrate close to the second substrate; A control electrode structure is disposed between the display electrode and the second substrate or on a 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 further includes an isolation electrode layer which is disposed between the display electrode and the touch electrode structure to prevent the electrical signals of the display electrode from interfering with each other. An electrical signal of the touch electrode structure, at least a part of the isolation electrode layer is correspondingly arranged to at least a part of the plurality of touch electrodes, and an electrical signal applied to the isolation electrode layer and a touch applied to a corresponding configuration thereof are arranged. The waveforms of the electrical signals of the electrodes are the same frequency and are substantially synchronized. The touch display panel according to claim 8, wherein the phase of the waveform of the electrical signal applied to the isolation electrode layer and the waveform of the electrical signal applied to the touch electrode is the same. The touch display panel according to claim 8, wherein the isolated electrode layer is a continuous layer, which overlaps with all of the plurality of touch electrodes. The touch display panel according to claim 8, wherein the isolated electrode layer includes a plurality of separated sub-electrodes spaced apart, and each isolated sub-electrode corresponds to at least one touch electrode. The touch display panel according to claim 11, wherein: each of the isolated sub-electrodes overlaps with at least one corresponding touch electrode, has substantially the same shape, and has 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 stacked on the first substrate, An anode layer, an organic light emitting layer, and a cathode layer, wherein the cathode layer is the display electrode. A touch driving method for driving the touch display panel according to any one of claims 1 to 13, the touch driving method includes: providing a touch driving signal to at least a part of the touch electrode structure And providing an isolated electrical signal that is configured to correspond to a touch electrode structure that receives at least a portion of the touch drive signal with an isolated electrical signal that is at the same frequency and substantially synchronized with the touch drive signal. A first touch driving circuit for driving the touch display panel according to any one of claims 1 to 7. The first touch driving circuit includes a multi-level unit sub-circuit, each level of the sub-circuit and a corresponding configuration. A pair of touch driving electrodes and isolation 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; a high-level input terminal To connect external high-level touch signals; low-level input terminals to connect external fixed voltage signals or ground signals; touch drive signal output terminals to output touch drive signals to touch drive electrodes ; An isolation signal output terminal for outputting an isolation signal having the same frequency as the touch driving signal and being basically synchronized to the isolation sub-electrode; and a trigger signal output terminal for outputting a trigger signal to a sub-unit sub-circuit; Under the control of the clock control signal and the high-level touch signal in the first period, it is used to output a signal with the same frequency and basically synchronized with the clock control signal. The second period outputs a fixed voltage signal or a ground signal. A second touch driving circuit is used for correspondingly configuring and electrically connecting with the first touch driving circuit described in claim 15. The improvement is that the second touch driving circuit includes: a timing generator, which is used for To generate and send a 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 It is used to generate and send a high-level touch signal to the high-level input terminal of the unit sub-circuit. The second touch driving circuit according to claim 16, wherein the second touch driving circuit further comprises a low-level generator for generating and sending a fixed voltage signal or a ground signal to the low power of the unit sub-circuit. Flat input. The second touch driving circuit according to claim 16, wherein the second touch driving 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 driving circuit according to claim 16, wherein the second touch driving circuit is directly disposed on the touch display panel or is an IC connected to the touch display panel through a flexible circuit board. A touch driving circuit for driving the touch display panel according to any one of claims 1 to 7. The improvement is that the touch driving circuit includes a first touch driving circuit and is electrically connected to the first A second touch driving circuit of a touch driving circuit. The first touch driving circuit includes multi-level unit sub-circuits, and each unit sub-circuit is correspondingly configured with a corresponding pair of touch driving electrodes and isolating sub-electrodes; 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; a high-level input terminal for connecting an external high-level touch signal; a low level An input terminal is used to connect an external fixed voltage signal or a ground signal; a touch drive signal output terminal is used to output a touch drive signal to the touch drive electrode; an isolated signal output terminal is used to output and touch the isolated sub-electrode. The driving signals are isolated signals of the same frequency and are basically synchronized; the trigger signal output terminal is used to output the trigger signal to the next-level unit sub-circuit; and the signal generating module, Under the control of the clock control signal and the high-level touch signal in the first period to output a signal having the same frequency and basically synchronized with the clock control signal, and output a fixed voltage signal or a ground signal in the second period; the second touch driving The circuit includes: a timing generator for generating and sending a clock control signal to the timing input of the unit sub-circuit; a pulse generator for generating and sending a pulse trigger signal to the trigger signal input 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 input terminal of the unit sub-circuit. The touch driving circuit according to claim 20, wherein the second touch driving circuit further includes a low-level generator for generating and sending a fixed voltage signal or a ground signal to the low-level input of the unit sub-circuit. end. A touch driving circuit for requesting the touch display panel according to any one of items 1 to 13 to send a touch driving signal to the touch electrode structure and to send a touch driving signal to the touch electrode according to the touch driving signal. The isolated electrode layer sends the required electrical signals.