TWI710935B - Touch display device - Google Patents

Abstract

A touch display device includes a touch display panel, a plurality of gate lines, a plurality of trace lines, a gate drive circuit and a retrace circuit. The touch display panel includes a plurality of pixel units and a plurality of touch electrodes. The plurality of gate lines is respectively coupled to the pixel unit. The plurality of traces extends along the direction of the pixel unit and is coupled to the plurality of touch electrodes. The gate drive circuit comprises a first set of drive circuits and a second group of driving circuits, the gate driving circuit is coupled to the plurality of gate lines and the plurality of traces for driving the plurality of pixel units and the plurality of touch electrodes. The retrace circuit is coupled between the first group of driving circuits and the second group of driving circuits. The touch display device of the invention adopts a common gate driving circuit of a gate line and a trace.

Description

Touch display device

The present invention relates to a display device, and more particularly to a touch display device including touch electrodes.

With the development of technology, touch display devices are applied to many electronic products, such as mobile phones, tablets, watches, etc., and touch devices and display panels are often used in combination. Currently, many manufacturers have proposed technologies for integrating touch devices into display panels. Compared with attaching the touch device to the outside of the display panel, integrating the touch device into the display panel can reduce the overall thickness of the product.

FIG. 1 is a schematic diagram of the structure of a conventional touch display device. As shown in FIG. 1, the touch display device 100 includes a control unit 110 and a display panel 120. The display panel 120 further includes a pixel array 130, a first gate circuit (such as the first gate driving circuit 140), a second gate circuit (such as the second gate driving circuit 150), and a touch electrode 160. In addition, the touch display device also includes multiple data lines (such as S1 to SN) and multiple traces (such as T1 to TN), and the data lines and traces need to be connected to the control unit 110 from below the display panel 120 in a vertical direction. , As shown in the oval area in the figure. Assuming that there are m touch electrodes 160 in the horizontal direction and n in the vertical direction, then The total number of touch electrodes 160 is m*n, so there are m*n traces to transmit the touch signal to the control unit 110. Assuming m=18, n=32, then the total number of traces is 18*32=576.

Existing touch display devices often increase the output lines of the touch electrodes to the control circuit, which increases the area occupied by the control circuit, which increases the difficulty of circuit design in the circuit part, increases the product size, and increases the production cost.

The invention provides a touch display device, which can reduce the area occupied by the circuit, simplify the fan-out design, reduce the product size, and reduce the production cost.

A touch display device of the present invention includes a touch display panel including a plurality of pixel units and a plurality of touch electrodes, and the plurality of pixel units are arranged in a plurality of rows along a first direction. The second direction is arranged in multiple rows, wherein the position of each of the multiple touch electrodes corresponds to the multiple pixel units; multiple gate lines are arranged on the touch display panel, and the multiple Gate lines are respectively coupled to the pixel unit; a plurality of traces are provided on the touch display panel, and the plurality of traces are arranged along the second direction, wherein the plurality of traces A trace is coupled to the plurality of touch electrodes; a gate driving circuit including a first group of driving circuits and a second group of driving circuits, and the first group of driving circuits and the second group of driving circuits The circuits respectively include a multi-level shift register, and the gate driving circuit is coupled to the plurality of gate lines and the plurality of traces for driving the plurality of pixel units and the plurality of contacts Control electrode; one Flyback circuits are respectively coupled between the first group of driving circuits and the second group of driving circuits.

A touch display device of the present invention includes a touch display panel including a plurality of pixel units and a plurality of touch electrodes, and the plurality of pixel units are arranged in a plurality of rows along a first direction. The second direction is arranged in multiple rows, wherein the position of each of the multiple touch electrodes corresponds to the multiple pixel units; multiple gate lines are arranged on the touch display panel, and the multiple Gate lines are respectively coupled to the pixel unit; a plurality of traces are arranged on the touch display panel, and the plurality of traces are arranged along the second direction, wherein the plurality of traces A trace is coupled to the plurality of touch electrodes; a gate driving circuit includes a first group of driving circuits and a second group of driving circuits, and the first group of driving circuits and the second group of driving circuits The circuits respectively include a multi-level shift register, and the gate driving circuit is coupled to the plurality of gate lines and the plurality of traces for driving the plurality of pixel units and the plurality of contacts Control electrode; a flyback circuit, respectively coupled between the first set of drive circuits and the second set of drive circuits, and the flyback circuit is electrically connected to a first control signal and a second control signal . During a display period, the first control signal is an enable potential, the second control signal is a disable potential; during a touch period, the second control signal is an enable potential, The first control signal is a disable potential.

The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments, but not as a limitation to the present invention.

100, 200, 200’, 200’’: touch display device

110, 210: control unit

120, 220: display panel

130, 230: pixel array

140: The first gate circuit

150: second gate circuit

160, 260: touch electrodes

240: The first group of drive circuits

250: The second group of drive circuits

270: Touch control circuit

280, 280’, 280’’: Flyback circuit

281: The first switch unit

282: The second switch unit

283: The third switch unit

284: The fourth switch unit

285: Fifth switch unit

286: The sixth switch unit

287: seventh switch unit

288: Eighth switch unit

CS[1-1]~CS[1-8], CS[2-1]~CS[2-8]: Control circuit

CT11~CTmn: contact point

DSR: Virtual Displacement Register

G1~G4, G[1-1]~G[1-8], G[2-1]~G[2-8], G[n-1]~G[n-4]: gate line

GOA: Gate drive circuit

S1~SN: data cable

SR1-1~SR1-8, SR2-1~SR2-8, SRn-1~SRn-4: shift register

T1~TN, TL1~TLN, TL[1-1]~TL[1-4], TL[n-1]~TL[n-4]: Trace

TP_PAD1~TP_PADn: 1st~n rows of touch electrodes

DSW, TSW, TPCOM, DCOM, VGL: control signal

FIG. 1 is a schematic diagram of the structure of a conventional touch display device.

2 is a schematic diagram of the structure of a touch display device according to an embodiment of the invention.

FIG. 3 is a schematic structural diagram of a gate driving circuit according to an embodiment of the present invention.

4 is a schematic structural diagram of a touch control circuit according to an embodiment of the invention.

FIG. 5 is a timing diagram of control signal switching according to an embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a touch display device according to another embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a touch display device according to another embodiment of the present invention.

The structural principle and working principle of the present invention will be described in detail below with reference to the accompanying drawings.

2 is a schematic diagram of the structure of a touch display device according to an embodiment of the invention. As shown in FIG. 2, in this embodiment, the touch display device 200 includes a control unit 210 and a display panel 220. Among them, the display panel 220 further includes a pixel array 230 and a gate driving circuit GOA. In this embodiment, the control unit 210 may include a data driving circuit for providing image data voltage to the pixel array 230 for display. In addition, the control unit 210 can also be used to receive touch data for touch control. However, the present invention is not limited to this. For example, the control unit 210 may be a timing controller or configured in a timing controller to provide various control signals to the gate driving circuit GOA, the data driving circuit or the pixel array 230.

Specifically, in this embodiment, the pixel array 230 has a plurality of pixel units (not shown in the figure), and a plurality of gate lines (such as gate line G1). ~GN), the pixel unit is controlled by the corresponding gate line to control the circuit operation of the pixel array 230.

In the embodiment of the present invention, those skilled in the art can determine the number of pixels and gate lines in the pixel array 230 according to the design requirements of the display panel 220, where the aforementioned N is a positive integer.

A plurality of touch electrodes 260 are also formed on the display panel 220. Each touch electrode 260 corresponds to a plurality of pixel units, and is overlapped and arranged above the plurality of pixel units. In this embodiment, the touch electrode 260 is used as Take m rows, n per row, total m*n as an example. There are multiple traces TL1 to TLN, and each touch electrode 260 is coupled to one of the multiple traces TL1 to TLN through contact points CT11 to CTmn, where m and n are positive integers. The traces TL1~TLN and the gate lines G1~GN are arranged in the same direction.

In this embodiment, the touch display device 200 further includes a touch control circuit 270. Specifically, the touch control circuit 270 is disposed between the pixel array 230 (touch electrode 260) and the gate driving circuit GOA. In addition, the touch control circuit 270 is respectively coupled to the gate driving circuit GOA and the touch electrode 260 (or pixel array 230). Therefore, the gate driving circuit GOA and the touch control circuit 270 are used to drive the pixel unit (not shown in the figure) and the touch electrode 260.

3 is a schematic diagram of the structure of a gate drive circuit according to an embodiment of the present invention. As shown in FIG. 2 and FIG. 3, the gate driving circuit GOA includes a first group of driving circuits 240 and a second group of driving circuits 250. Those skilled in the art can determine the number of groups of driving circuits in the gate driving circuit GOA according to the design requirements of the display panel 220. The present invention only takes two groups as an example, but is not limited to the above The number of examples. Among them, the first group of driving circuits 240 and the second group of driving circuits 250 both include multi-level shift registers SR1-1 to SR1-8, SR2-1 to SR2-8. The number of stages can be the same or different. Multi-level shift registers SR1-1~SR1-8, SR2-1~SR2-8 are connected in series, and the output terminals of each level shift register SR1-1~SR1-8, SR2-1~SR2-8 are respectively connected in series It is coupled to the corresponding gate lines G[1-1]~G[1-8], G[2-1]~G[2-8]. Between the first group of driving circuits 240 and the second group of driving circuits 250, a flyback circuit 280 is also coupled.

In this embodiment, the flyback circuit 280 includes a dummy displacement register DSR, a first switch unit 281, a second switch unit 282, and a third switch unit 283. The first switch unit 281, the second switch unit 282, and the third switch unit 283 respectively include a first terminal, a second terminal, and a control terminal. For example, the first switch unit 281, the second switch unit 282, and the third switch unit 283 may be thin film transistors. Among them, the first end is the source/drain of the thin film transistor, the second end is the drain/source of the thin film transistor, and the control end is the gate of the thin film transistor. However, the present invention is not limited to this, and other switching elements can be used according to manufacturing process or driving requirements.

Please refer to FIG. 3, the dummy shift register DSR is coupled to the last stage shift register SR1-8 of the first group of driving circuits 240 and the source/drain of the second switch unit 282; the drain of the second switch unit 282 The pole/source is coupled to the first-stage shift register SR2-1 of the second group of driving circuits 250; the source/drain of the first switch unit 281 is coupled to the first-stage shift of the first group of driving circuits 240 Register SR1-1, the drain/source of the first switch unit 281 is coupled to the first The second-stage displacement register SR1-2 of the group driving circuit 240; the source/drain of the third switch unit 283 is coupled to the source/drain of the first switch unit 281, and the drain of the third switch unit 283 /The source is coupled to the virtual shift register DSR. The gate of the first switch unit 281 is electrically connected to a control signal DSW; the gate of the second switch unit 282 is also electrically connected to the control signal DSW; the gate of the third switch unit 283 is electrically connected to a control signal TSW.

Please refer to the touch display device 200 of FIG. 2 again. The gate driving circuit GOA is coupled to the control unit 210, and the control unit 210 provides the gate driving circuit control signal and the control signals DSW and TSW. In this embodiment, the control signal DSW is a display switch control signal, and the control signal TSW is a touch switch control signal. When the control signal DSW is at a high level, the display panel 230 is in a display state, and when the control signal TSW is at a high level, the display panel 230 is in a touch state. Specifically, when the touch display device 200 is in the display state, the control signal DSW is the enable signal, and the control signal TSW is the disable signal; conversely, when the touch display device 200 is in the touch state, the control signal DSW is The disable signal, and the control signal TSW is the enable signal. Taking N-type switching elements to form the flyback circuit 280 in FIG. 3 as an example, when the touch display device 200 is in the display state, the control signal DSW is at a high potential, and the control signal TSW is at a low potential; when the touch display device 200 is at In the touch state, the control signal DSW is at a low level, and the control signal TSW is at a high level. By analogy, when a P-type switching element is used as an example, the enabling signal is a low potential, and the disabling signal is a high potential.

4 is a schematic structural diagram of a touch control circuit according to an embodiment of the invention. As shown in FIG. 2, FIG. 3 and FIG. 4, the touch control circuit 270 includes multiple groups Control circuit CS[1-1]~CS[1-8], CS[2-1]~CS[2-8], each group of control circuits CS[1-1]~CS[1-8], CS[ 2-1]~CS[2-8] corresponds to the shift registers SR1-1~SR1-8, SR2-1~SR2-8 and traces TL1~TLN coupled to them.

The circuit structure of each group of control circuits is the same. In this embodiment, the first group of control circuits CS[1-1] is taken as an example. The control circuit CS[1-1] includes a fourth switch unit 284, a fifth switch unit 285, a sixth switch unit 286, a seventh switch unit 287, and an eighth switch unit 288. Among them, the fourth switch unit 284, the fifth switch unit 285, the sixth switch unit 286, the seventh switch unit 287, and the eighth switch unit 288 respectively include a first terminal, a second terminal, and a control terminal. For example, the fourth switch unit 284, the fifth switch unit 285, the sixth switch unit 286, the seventh switch unit 287, and the eighth switch unit 288 may be thin film transistors. Among them, the first end is the source/drain of the thin film transistor, the second end is the drain/source of the thin film transistor, and the control end is the gate of the thin film transistor. However, the present invention is not limited to this, and other switching elements can be used according to manufacturing process or driving requirements.

In this embodiment, the source/drain of the fourth switch unit 284 is electrically connected to a control signal TPCOM, and its drain/source is coupled to the source/drain of the fifth switch unit 285, and the fifth switch The drain/source of the cell 285 is coupled to its corresponding trace TL1. The source/drain of the sixth switch unit 286 is electrically connected to a control signal DCOM, and its drain/source is coupled to its corresponding trace TL1. The source/drain of the seventh switch unit 287 is coupled to its corresponding shift register SR1-1, and its drain/source is coupled to its corresponding gate line G[1-1]. The source/drain of the eighth switch unit 288 is electrically connected to a control signal No. VGL, its drain/source is coupled to its corresponding gate line G[1-1]. In addition, the gate of the fourth switch unit 284 is coupled to the output terminal of the displacement register SR1-1; the gates of the fifth switch unit 285 and the eighth switch unit 288 are electrically connected to the control signal TSW; the sixth switch unit 286 And the gate electrode of the seventh switch unit 287 is electrically connected to the control signal DSW. Specifically, when the touch display device 200 is in the display state, the control signal DSW is the enable signal, and the control signal TSW is the disable signal; conversely, when the touch display device 200 is in the touch state, the control signal DSW is The disable signal, and the control signal TSW is the enable signal. Taking N-type switching elements to form the touch control circuit of FIG. 4 as an example, when the touch display device 200 is in the display state, the control signal DSW is at a high potential, and the control signal TSW is at a low potential; when the touch display device 200 is at In the touch state, the control signal DSW is at a low level, and the control signal TSW is at a high level. By analogy, when a P-type switching element is used as an example, the enable signal is a low potential, and the disable signal is a high potential.

Please refer to the touch display device 200 of FIG. 2 again. The touch control circuit 270 is coupled to the control unit 210, and the control unit 210 provides control signals DSW, TSW, TPCOM, DCOM, and VGL. Among them, the control signal TPCOM is the common voltage signal of the touch state, the control signal DCOM is the common voltage signal of the display state, and the VGL is the pixel unit off signal. When the touch display device 200 is in the touch state, the control signal TPCOM provides a common voltage to the display panel 230 to drive the touch electrodes 260; when the touch display device 200 is in the display state, the control signal DCOM provides another A common voltage drives multiple pixel units. When in the touch state, the control signal VGL provides a fixed potential to the pixel unit, such as a low level, Turn off the thin film transistor in the pixel unit. In other words, in the touch state, when the control signal VGL is at a low level, it can ensure that the low level is transmitted to the gate line G[1-1], thereby making the gate (control terminal) of the thin film transistor in the pixel unit Can receive low level without conducting.

It can be seen from the above that the touch display device 200 of this embodiment connects the traces TL1 to TLN of all touch electrodes 260 to the touch control circuit 270, and then the control unit 210 uses the control signals DSW, TSW, TPCOM, DCOM , VGL drives the touch electrode 260 of the display panel 230. It can be seen that no matter how the number of touch electrodes 260 in the display panel 230 increases, there are only 5 control signals transmitted by the control unit 210 to the touch control circuit 270, and only 5 signal lines are needed to realize the control of the display panel. The driving of the touch electrode 260 in 230.

FIG. 5 is a timing diagram of control signal switching according to an embodiment of the present invention. 2 to 5, during the display period, the control signal DSW is high, the control signal TPCOM and the control signal TSW are low, the first switch unit 281, the second switch unit 282, and the sixth switch unit 286 And the seventh switch unit 287 is in the on state, the fifth switch unit 285 and the eighth switch unit 288 are in the off state, and the control signal DCOM is connected to the gate line G through the sixth switch unit 286 and the seventh switch unit 287 [1-1 ], the output signal of the shift register SR1-1 is provided to the gate line G[1-1] to drive the pixel unit in the display panel 230 to ensure the normal display of the display panel 230.

When transitioning from the display state to the touch state, the control signal TSW becomes a high level, the control signal DSW becomes a low level, the first switch unit 281, the second switch unit 282, the sixth switch unit 286, and the seventh switch unit The cell 287 is in the off state, the third switch unit 283, the fifth switch unit 285, and the eighth switch unit 288 are in the on state, and the control signal DCOM is disconnected by the sixth switch unit 286 and the seventh switch unit 287 and cannot be connected to the gate. Line G[1-1]; At the same time, the output signal of the shift register SR1-1 provided to the gate line G[1-1] is also disconnected. Since the eighth switch unit 288 is in the on state, the control signal VGL is transmitted to the gate line G[1-1] through the eighth switch unit 288, thereby maintaining the gate line G[1-1] in the display panel 230 in the control The potential of the signal VGL. When VGL is low, the thin film transistor in the pixel unit is turned off in the display panel 230. At the same time, the third switch unit 283 is in the on state, and after the output signal of the shift register SR1-8 is transmitted to the virtual shift register DSR, since the second switch unit 282 is in the off state, the output signal cannot be shifted to the next stage The register SR2-1 is transmitted, and because the third switch unit 283 is turned on, the output signal returns to the shift register SR1-2 upward, and the output signals of the shift register SR1-2~SR1-8 turn on the fourth switch unit 284. The common voltage of the touch state, that is, the control signal TPCOM, is transmitted to the trace TL2 through the fourth switch unit 284 and the fifth switch unit 285 to drive the touch electrode 260 in the display panel 230. In this way, the flyback circuit 280 and the touch control circuit 270 can be used to repeatedly turn on the displacement registers SR1-2~SR1-8, and then scan the gate lines G[1-2]~G[1-8] With the traces TL2~TL8, the touch control circuit 270 and the gate drive circuit GOA share the gate line.

When the display panel 230 is working, the output signal of each shift register in the gate drive circuit GOA will be used as the start signal of the next shift register. Therefore, it can be set at a certain level of shift register according to the design requirements. The start signal sets the switch unit, and the switch unit is controlled by the control signals DSW and TSW, so that after the display panel 230 displays a segment of an image, the drive signal is returned to the displacement register where the switch unit is set as a displacement temporary storage. The output signal of the displacement register can be reused.

In this embodiment, the first switch unit 281 is disposed between the first-stage displacement register SR1-1 and the second-stage displacement register SR1-2 of the first group of driving circuits 240, or according to the touch electrode The number of 260 is set in the other stage shift register.

FIG. 6 is a schematic structural diagram of a touch display device according to another embodiment of the present invention. As shown in FIGS. 2 to 4 and 6, in the touch display device 200' of this embodiment, the touch electrodes 260 in the display panel 230 are divided into n rows, and n is a positive integer. When each row of touch electrodes corresponds to a four-level displacement register and a four-level touch control circuit, for example, the first row of touch electrodes TP_PAD1 corresponds to the displacement registers SR1-1~SR1-4 and the touch control circuit CS[1 -1]~CS[1-4]; The second row of touch electrodes TP_PAD2 corresponds to the displacement register SR2-1~SR2-4 and the touch control circuit CS[2-1]~CS[2-4]; The n rows of touch electrodes TP_PADn correspond to the displacement registers SRn-1 to SRn-4 and the touch control circuit CS[n-1] to CS[n-4] (not shown in the figure). If there are only two touch electrodes in each row in the horizontal direction, a flyback circuit 280' can be provided every fourth level of displacement register. For example, the flyback circuit 280' is arranged between the fourth-stage shift register SR1-4 in the first row and the first-stage shift register SR2-1 in the second row, and the flyback start point is set in the first row. The third stage shift register SR1-3 of the row. At this time, the touch control circuit CS[1-3] and the touch control circuit CS[1-4] of the touch control circuit 270 are used to scan the first scan through the traces TL[1-3] and TL[1-4]. One Row touch electrodes TP_PAD1, traces TL[1-1], TL[1-2] float or connect to other touch electrodes (not shown in the figure); touch control circuit CS[2-3] and touch The control control circuit CS[2-4] is used to scan the second row of touch electrodes TP_PAD2 through traces TL[2-3], TL[2-4], traces TL[2-1], TL[2-2 ] Floating or connected to other touch electrodes (not shown in the figure), and so on. Therefore, although each row of touch electrodes corresponds to a four-level displacement register and a four-level touch control circuit, only two-level displacement registers and a two-level touch control circuit are needed to achieve two touch electrodes for the row. Scan. At this time, the scanning frequency of the display state is the same as the scanning frequency of the touch state. It should be noted that each level of displacement register is also coupled to its corresponding gate line G[1-1]~G[n-4] in the display panel 230, which is not labeled in the figure for ease of description.

FIG. 7 is a schematic structural diagram of a touch display device according to another embodiment of the present invention. As shown in FIG. 2 to FIG. 4 and FIG. 7, in the touch display device 200'' of this embodiment, the touch electrodes 260 in the display panel 230 are divided into n rows, and n is an even number. Similarly, each row of touch electrodes corresponds to a four-level displacement register. If there are only two touch electrodes 260 in the horizontal direction, a flyback circuit 280'’ can be provided every fourth-level displacement register. For example, the flyback circuit 280'' is arranged between the fourth-stage shift register SR1-4 in the first row and the first-stage shift register SR2-1 in the second row. The difference from the embodiment shown in FIG. 6 is that the retrace starting point of the retrace circuit 280″ is set in the first-stage displacement register SR1-1 in the first row, and the first-stage control circuit of the touch control circuit 270 CS[1-1] and the second-level control circuit CS[1-2] are used to scan the first row of touch electrodes TP_PAD1 through traces TL[1-1] and TL[1-2]; The first-level control circuit CS[2-1] and the second-level control circuit CS[2-2] pass the trace TL[2-1] and TL[2-2] are used to scan the second row of touch electrodes TP_PAD2. If the n rows of touch electrodes 260 are divided into two groups, the third-level control circuit CS[1-3] and the fourth-level control circuit CS[1-4] of one row pass through the traces TL[1-3], TL[1-4] is used to scan the n/2th row of touch electrodes TP_PAD n/2, the third level control circuit CS[2-3] and the fourth level control circuit CS[2-4] of the second row pass The traces TL[2-3] and TL[2-4] are used to scan the n/2+1th row of touch electrodes TP_PAD n/2+1. By analogy, each touch electrode has two traces to scan it, and each touch electrode is scanned twice in a cycle, the scanning frequency of the touch state is twice the scanning frequency of the display state.

Similarly, the n rows of touch electrodes 260 can also be divided into X groups, each group corresponding to a Y-level control circuit, each touch electrode corresponds to a Z-level control circuit at the same time, that is, simultaneously coupled to Z traces, Z The group number difference between two adjacent traces is X/Z, and the Z traces corresponding to each touch electrode have the same level. X, Y, and Z are even numbers greater than 2, and X and Y can be divisible by Z. It can be realized that the scanning frequency of the touch state is Z times the scanning frequency of the display state, thereby improving the sensitivity of the touch signal.

Of course, the present invention can also have various other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and All deformations should fall within the protection scope of the attached patent application of the present invention.

200‧‧‧Touch display device

210‧‧‧Control Unit

220‧‧‧Display Panel

230‧‧‧Pixel array

260‧‧‧Touch electrode

270‧‧‧Touch control circuit

CT11~CTmn‧‧‧Contact point

G1~GN‧‧‧Gate line

GOA‧‧‧Gate drive circuit

TL1~TLN‧‧‧Trace

Claims (27)

A touch display device includes: a touch display panel including a plurality of pixel units and a plurality of touch electrodes, the plurality of pixel units are arranged in a plurality of rows along a first direction and along a second The directions are arranged in multiple rows, wherein the position of each of the plurality of touch electrodes corresponds to the plurality of pixel units; a plurality of gate lines are provided on the touch display panel, and the plurality of gates The polar lines are respectively coupled to the pixel unit; a plurality of traces are arranged on the touch display panel, and the plurality of traces are arranged extending along the second direction, wherein the plurality of traces Line coupled to the plurality of touch electrodes; a gate drive circuit including a first set of drive circuits and a second set of drive circuits, and the first set of drive circuits and the second set of drive circuits are respectively A multi-level displacement register is included, and the gate driving circuit is coupled to the plurality of gate lines and the plurality of traces for driving the plurality of pixel units and the plurality of touch electrodes ; A flyback circuit, respectively coupled between the first group of driving circuits and the second group of driving circuits. In the touch display device according to claim 1, the flyback circuit includes at least one virtual displacement register and a plurality of switch units. According to the touch display device of claim 2, the plurality of switch units include a first switch unit, a second switch unit, and a first switch unit. Three switch units, and the first switch unit, the second switch unit and the third switch unit respectively have a first end, a second end and a control end, wherein the virtual displacement register Respectively coupled to the displacement register of the last stage of the first group of driving circuits and the first end of the second switch unit. In the touch display device according to claim 3, the second end of the second switch unit is coupled to the first stage of the displacement register of the second group of driving circuits. In the touch display device according to claim 4, the first end of the first switch unit is coupled to the first stage of the displacement register of the first group of driving circuits, and the second end The second stage shift register is coupled to the first group of driving circuits. In the touch display device according to claim 5, the first end of the third switch unit is coupled to the first end of the first switch unit, and the second end is coupled to the Virtual displacement register. In the touch display device according to claim 3, the control terminal of the first switch unit is electrically connected to a first control signal; The control terminal of the second switch unit is electrically connected to the first control signal; the control terminal of the third switch unit is electrically connected to a second control signal. The touch display device according to claim 1, further comprising a touch control circuit coupled between the gate driving circuit and the plurality of touch electrodes and the plurality of pixel units, wherein: The touch control circuit includes a plurality of groups of control circuits, and each group of the control circuits corresponds to each stage of the shift register. According to the touch display device according to claim 8, each group of the control circuits includes a fourth switch unit, a fifth switch unit, a sixth switch unit, a seventh switch unit, and an eighth switch unit, and The fourth switch unit, the fifth switch unit, the sixth switch unit, the seventh switch unit, and the eighth switch unit respectively have a first end, a second end, and a control end, Wherein, the first end of the fourth switch unit is electrically connected to a third control signal, the second end is coupled to the first end of the fifth switch unit, and the fifth switch unit The second end of is coupled to the trace. In the touch display device according to claim 9, the first end of the sixth switch unit is electrically connected to a fourth control signal, and the second end is coupled to the plurality of traces. The touch display device according to claim 10, wherein the first end of the seventh switch unit is coupled to the multi-level displacement register, and the second end is coupled to the plurality of gates line. In the touch display device according to claim 11, the first terminal of the eighth switch unit is electrically connected to a fifth control signal, and the second terminal is coupled to the plurality of gate lines. In the touch display device according to claim 12, the control terminal of the fourth switch unit is coupled to the plurality of displacement registers; all of the fifth switch unit and the eighth switch unit The control terminal is electrically connected to the second control signal; the control terminals of the sixth switch unit and the seventh switch unit are electrically connected to the first control signal. The touch display device according to claim 1, wherein the multiple traces include X sets of traces, each set of traces includes Y-level traces, and each of the touch electrodes is simultaneously coupled to Z traces Line, wherein the group number difference between two adjacent ones of the Z traces is X/Z, the Z traces have the same number of stages, X, Y, and Z are even numbers greater than 2, and X, Y Can be divisible by Z. A touch display device includes: A touch display panel includes a plurality of pixel units and a plurality of touch electrodes. The pixel units are arranged in multiple columns along a first direction and arranged in multiple rows along a second direction, wherein: The positions of each of the plurality of touch electrodes correspond to the plurality of pixel units; a plurality of gate lines are provided on the touch display panel, and the plurality of gate lines are respectively coupled to the Pixel unit; a plurality of traces are provided on the touch display panel, and the plurality of traces are arranged along the second direction, wherein the plurality of traces are coupled to the plurality of traces Touch electrodes; a gate drive circuit, including a first set of drive circuits and a second set of drive circuits, and the first set of drive circuits and the second set of drive circuits each include a multi-level shift register, The gate driving circuit is coupled to the plurality of gate lines and the plurality of traces for driving the plurality of pixel units and the plurality of touch electrodes; a flyback circuit is respectively coupled Connected between the first group of driving circuits and the second group of driving circuits, and the flyback circuit is electrically connected with a first control signal and a second control signal; characterized in that; during a display period, The first control signal is an enable potential, the second control signal is a disable potential; during a touch period, the second control signal is an enable potential, and the first control signal The signal is forbidden potential. According to the touch display device of claim 15, the flyback circuit includes at least one virtual displacement register and a plurality of switch units. In the touch display device according to claim 16, the plurality of switch units include a first switch unit, a second switch unit, and a third switch unit, and the first switch unit and the second switch The unit and the third switch unit respectively have a first terminal, a second terminal, and a control terminal, wherein the virtual displacement register is respectively coupled to the displacement register of the last stage of the first group of driving circuits A register and the first end of the second switch unit. In the touch display device according to claim 17, the second end of the second switch unit is coupled to the first stage of the displacement register of the second group of driving circuits. In the touch display device according to claim 18, the first terminal of the first switch unit is coupled to the first stage of the displacement register of the first group of driving circuits, and the second terminal The second stage shift register is coupled to the first group of driving circuits. In the touch display device according to claim 19, the first end of the third switch unit is coupled to the first end of the first switch unit, and the second end is coupled to the Virtual displacement register. The touch display device according to claim 17, The control terminal of the first switch unit is electrically connected to the first control signal; the control terminal of the second switch unit is electrically connected to the first control signal; all of the third switch unit The control terminal is electrically connected to the second control signal. The touch display device according to claim 15, further comprising a touch control circuit coupled between the gate driving circuit and the plurality of touch electrodes and the plurality of pixel units, the The touch control circuit includes a plurality of groups of control circuits, and each group of the control circuits corresponds to each stage of the displacement register, wherein the touch control circuit is electrically connected to the first control signal, the second Control signal. In the touch display device according to claim 22, each group of the control circuits includes a fourth switch unit, a fifth switch unit, a sixth switch unit, a seventh switch unit, and an eighth switch unit, and The fourth switch unit, the fifth switch unit, the sixth switch unit, the seventh switch unit, and the eighth switch unit respectively have a first end, a second end, and a control end, Wherein, the first end of the fourth switch unit is electrically connected to a third control signal, the second end is coupled to the first end of the fifth switch unit, and the fifth switch unit The second end of is coupled to the trace; During the touch period, the third control signal is a touch common voltage potential. In the touch display device according to claim 23, the first end of the sixth switch unit is electrically connected to a fourth control signal, and the second end is coupled to the plurality of traces; During the display period, the fourth control signal is to display a common voltage potential. The touch display device according to claim 24, wherein the first end of the seventh switch unit is coupled to the multi-level displacement register, and the second end is coupled to the plurality of gates line. In the touch display device according to claim 25, the first end of the eighth switch unit is electrically connected to a fifth control signal, and the second end is coupled to the plurality of gate lines; During the touch, the fifth control signal is at a low voltage level. In the touch display device according to claim 26, the control end of the fourth switch unit is coupled to the plurality of displacement registers; all of the fifth switch unit and the eighth switch unit The control terminal is electrically connected to the second control signal; The control ends of the sixth switch unit and the seventh switch unit are electrically connected to the first control signal.

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