Touch panel, display apparatus, and display driving method

Abstract

The present application relates to the technical field of display, and provides a touch panel, a display apparatus, and a display driving method. The touch panel comprises: a display panel and a touch sensor layer arranged on the light exit side of the display panel. The display panel comprises a gate driving circuit and a plurality of control signal lines. The control signal lines are electrically connected to the gate driving circuit. A first control signal line is used for receiving a first control signal sent by a timing control circuit at a first moment, and a second control signal line is used for receiving a second control signal sent by the timing control circuit with a delay relative to the first moment. The first control signal and the second control signal are gate driving control signals of the same type. The moment at which the control signal lines receive first signal edges is earlier than the moment at which the control signal lines receive second signal edges. Each first signal edge of the second control signal is aligned with one second signal edge of the first control signal. The noise of the touch panel can be reduced, thereby improving the touch effect of the touch panel.

Description

A touch panel, a display device and a display driving method

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 2024117521870, filed on November 29, 2024, entitled “A Touch Panel, Display Device and Display Driving Method”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of display technology, and in particular to a touch panel, display device and display driving method. Background Technology

[0004] In related technologies, a touch sensor layer can be fabricated on a color filter (CF) substrate to obtain an oncell touch panel. When a user touches the oncell touch panel with their finger, the touch sensor layer recognizes the finger's touch point and reacts.

[0005] Oncell touch panels include gate drive circuits composed of multiple gate drive units, such as Gate On Array (GOA). Timing control circuits transmit timing control signals, such as STV signals, CLK signals, and other GOA control signals, to the gate drive circuits via control signal lines.

[0006] In current Oncell touch panels, the control signal lines and the touch sensing layer are located on the top and bottom sides of the color filter substrate, and coupling capacitance may form between the control signal lines and the touch sensing layer. When a signal change occurs on the control signal line, noise will be coupled into the signal of the touch sensing layer due to the coupling capacitance, causing the touch function of the Oncell touch panel to fail.

[0007] Summary of the Invention

[0008] This application provides a touch panel, a display device, and a display driving method, which can solve the problem of touch function failure of the Oncell touch panel caused by the coupling capacitance between the control signal line and the touch sensing layer.

[0009] In a first aspect, this application provides a touch panel, the touch panel comprising: a display panel, and a touch sensing layer disposed on the light-emitting side of the display panel, the display panel comprising a gate driving circuit and a plurality of control signal lines; the control signal lines are electrically connected to the gate driving circuit, and the control signal lines are also used to connect to the timing control circuit of the touch panel;

[0010] The multiple control signal lines include a first control signal line and a second control signal line. The first control signal line is used to receive a first control signal sent by the timing control circuit at a first moment, and the second control signal line is used to receive a second control signal sent by the timing control circuit after a delay based on the first moment. The first control signal and the second control signal are gate drive control signals of the same type.

[0011] The gate drive control signal includes a first signal edge and a second signal edge. The control signal line receives the first signal edge earlier than the second signal edge. Within one frame, each first signal edge of the second control signal is aligned with one second signal edge of the first control signal. The first signal edge represents a signal transition from a first level to a second level, and the second signal edge represents a signal transition from the second level to the first level.

[0012] Optionally, the first control signal line and the second control signal line are frame start signal lines;

[0013] Wherein, the first control signal and the second control signal are frame start signals, and the frame start signal includes a first signal edge and a second signal edge;

[0014] The first signal edge of the second control signal received by the second control signal line is aligned with the second signal edge of the first control signal received by the first control signal line.

[0015] Optionally, the first control signal line and the second control signal line are clock signal lines;

[0016] Wherein, the first control signal and the second control signal are clock signals, and the clock signal is in a level switching mode during the blank area of ​​the frame time. The level switching mode represents the clock signal switching level state between the first level and the second level.

[0017] Each first signal edge of the clock signal received by the second control signal line is aligned with a second signal edge of the clock signal received by the first control signal line.

[0018] Optionally, the display panel includes a display area and a non-display area located outside the display area; the non-display area includes a first border area and a second border area disposed on the opposite side of the display area;

[0019] The gate driving circuit includes a first driving circuit and a second driving circuit; the first driving circuit is disposed in the first frame area, and the second driving circuit is disposed in the second frame area; the first driving circuit and the second driving circuit respectively include gate driving units cascaded together.

[0020] The plurality of control signal lines include a pair of first control signal lines and second control signal lines; the first driving circuit is electrically connected to at least one pair of the first control signal lines and the second control signal lines, and the second driving circuit is electrically connected to at least one pair of the first control signal lines and the second control signal lines.

[0021] Optionally, the plurality of control signal lines include two pairs of the first control signal lines and the second control signal lines, wherein the first control signal lines and the second control signal lines are frame start signal lines respectively;

[0022] The first pair of frame start signal lines are disposed in the first border area; in the first pair of frame start signal lines, the first control signal line is electrically connected to at least one gate driving unit in the first driving circuit, and the second control signal line is electrically connected to at least one gate driving unit in the first driving circuit; wherein, in the first pair of frame start signal lines, the first control signal line receives the first control signal sent by the timing control circuit at a first sub-time.

[0023] The second pair of frame start signal lines is disposed in the second border area; in the second pair of frame start signal lines, the first control signal line is electrically connected to at least one gate driving unit in the second driving circuit, and the second control signal line is electrically connected to at least one gate driving unit in the second driving circuit; wherein, in the second pair of frame start signal lines, the first control signal line receives the first control signal sent by the timing control circuit at a second sub-time; the first time includes the first sub-time and the second sub-time; the time difference between the first sub-time and the second sub-time is one line scan duration.

[0024] Optionally, the cascaded gate driving units include: a first redundant unit, a second redundant unit, and N cascaded gate driving units; where N is a positive integer;

[0025] The first redundant unit is cascaded with the first-stage gate driving unit among the N gate driving units, and the second redundant unit is cascaded with the second-stage gate driving unit among the N gate driving units;

[0026] The first control signal line and the second control signal line are frame start signal lines, the first control signal line is electrically connected to the first redundancy unit, and the second control signal line is electrically connected to the second redundancy unit;

[0027] The display panel also includes multiple clock signal lines, which are used to connect to the timing control circuit and receive clock signals sent by the timing control circuit.

[0028] The plurality of clock signal lines include a first clock signal line and a second clock signal line. The first clock signal line is electrically connected to the gate driving unit of the first stage, and the second clock signal line is electrically connected to the gate driving unit of the second stage.

[0029] The first clock signal line receives the clock signal sent by the timing control circuit at a second time, the time difference between the second time and the first time being four row scan durations; the second clock signal line receives the clock signal sent by the timing control circuit at a third time, the time difference between the third time and the second time being two row scan durations.

[0030] Optionally, the display panel includes a first display substrate and a second display substrate; the gate driving circuit and the plurality of control signal lines are disposed in the first display substrate, and the touch sensing layer is disposed on the side of the second display substrate opposite to the first display substrate;

[0031] The display panel further includes: a light-shielding layer disposed on the side of the second display substrate near the first display substrate; the light-shielding layer includes a first groove;

[0032] The orthographic projection of the first groove on the first surface is a first orthographic projection, the orthographic projection of the control signal line on the first surface is a second orthographic projection, and the orthographic projection of the touch sensing layer on the first surface is a third orthographic projection; the first surface is the surface of the second display substrate close to the first display substrate.

[0033] There is no overlap between the second orthographic projection and the third orthographic projection; the first orthographic projection is located between the second orthographic projection and the third orthographic projection, so that the first groove disconnects the coupling capacitance between the control signal line and the touch sensing layer.

[0034] Optionally, the plurality of control signal lines include a frame start signal line; the touch sensing layer includes a first electrode;

[0035] The orthographic projection of the first electrode onto the first surface is a first sub-projection, and the third orthographic projection includes the first sub-projection;

[0036] The second orthographic projection corresponding to the frame start signal line does not overlap with the first sub-projection; the first orthographic projection is located between the first sub-projection and the second orthographic projection corresponding to the frame start signal line, so that the first groove disconnects the coupling capacitance between the frame start signal line and the first electrode.

[0037] Optionally, the plurality of control signal lines include clock signal lines; the touch sensing layer includes a second electrode;

[0038] The orthographic projection of the second electrode onto the first surface is a second sub-projection, and the second orthographic projection includes the second sub-projection;

[0039] The first orthographic projection corresponding to the clock signal line does not overlap with the second sub-projection; the first orthographic projection is located between the second sub-projection and the second orthographic projection corresponding to the clock signal line, so that the first groove disconnects the coupling capacitance between the clock signal line and the second electrode.

[0040] Optionally, the first orthographic projection overlaps with at most one of the second orthographic projection and the third orthographic projection.

[0041] Optionally, the shape of the first orthographic projection is a rectangle; the length of the first edge of the first orthographic projection is a first length;

[0042] The light-shielding layer has an overlapping area when projected onto the first surface and the second surface, and the length of the second edge of the overlapping area is a second length.

[0043] The first length is not less than the second length.

[0044] Optionally, the first display substrate includes a display area and a non-display area located outside the display area; the non-display area includes a first border area and a second border area disposed on the opposite side of the display area;

[0045] The control signal line is disposed in the first frame area, and the light-shielding layer includes at least one of the first grooves on the side near the first frame area.

[0046] And / or,

[0047] The control signal line is disposed in the second frame area, and the light-shielding layer includes at least one of the first grooves on the side near the second frame area.

[0048] Optionally, the light-shielding layer includes two first grooves on the side near the first frame area, and the first orthographic projections corresponding to the two first grooves do not overlap;

[0049] And / or,

[0050] The light-shielding layer includes two first grooves on the side near the second frame area, and there is no overlap between the first orthographic projections corresponding to the two first grooves.

[0051] Optionally, the non-display area further includes a third border area and a fourth border area disposed on the opposite side of the display area; the third border area is adjacent to the first border area and the second border area, respectively;

[0052] The light-shielding layer includes at least one second groove on the side near the third frame area, and the light-shielding layer includes at least one second groove on the side near the fourth frame area;

[0053] The second groove in the third border area is connected to a first groove in the first border area and a first groove in the second border area, respectively.

[0054] The second groove in the fourth border area is connected to a first groove in the first border area and a first groove in the second border area, respectively.

[0055] The first groove and the second groove, which are interconnected, form an annular groove.

[0056] Optionally, the orthographic projection of the second groove on the first surface is a fourth orthographic projection, and the fourth orthographic projection does not overlap with the third orthographic projection.

[0057] Optionally, the shape of the annular groove projected onto the first surface is an annular rectangle.

[0058] In a second aspect, this application provides a display device, the display device including a touch panel as described in the first aspect.

[0059] Thirdly, this application provides a display driving method for driving a touch panel as described in the first aspect, the display driving method comprising:

[0060] A first control signal is sent to a first control signal line at a first moment, and a second control signal is sent to a second control signal line after a delay based on the first moment, such that each first signal edge of the second control signal is aligned with a second signal edge of the first control signal within one frame time.

[0061] The gate drive control signal includes a first signal edge and a second signal edge. The control signal line receives the first signal edge earlier than it receives the second signal edge. The first control signal and the second control signal are gate drive control signals of the same type. The first signal edge represents a signal transition from a first level to a second level, and the second signal edge represents a signal transition from the second level to the first level.

[0062] Optionally, the step of sending a first control signal to a first control signal line at a first moment, and sending a second control signal to a second control signal line with a delay based on the first moment, includes:

[0063] A first control signal is sent to the first control signal line at the first moment, and a second control signal is sent to the second control signal line after a delay based on the first moment, so that the first signal edge of the second control signal is aligned with the second signal edge of the first control signal;

[0064] Wherein, the first control signal and the second control signal are frame start signals, and the frame start signal includes a first signal edge and a second signal edge; the first time corresponding to different pairs of frame start signal lines is different.

[0065] Optionally, the step of sending a first control signal to a first control signal line at a first moment, and sending a second control signal to a second control signal line with a delay based on the first moment, includes:

[0066] A first control signal is sent to the first control signal line at the first moment, and a second control signal is sent to the second control signal line after a delay based on the first moment, such that each first signal edge of the second control signal is aligned with a second signal edge of the first control signal.

[0067] Wherein, the first control signal and the second control signal are clock signals, and the clock signal is in a level switching mode during the blank area of ​​the frame time. The level switching mode represents the clock signal switching level state between the first level and the second level; the first time corresponding to different pairs of clock signal lines is different.

[0068] This application provides a touch panel, display device, and display driving method, which has at least the following advantages: Within one frame, each first signal edge of the second control signal is aligned with a second signal edge in the first control signal. The first signal edge represents a signal transition from a first level to a second level, and the second signal edge represents a signal transition from a second level to a first level; that is, the first and second signal edges represent opposite signal change trends. Thus, the noise coupled to the touch sensing layer by the first and second signal edges due to the coupling capacitance also has opposite trends. The noise coupling effect of each first signal edge of the second control signal can be canceled out by the noise coupling effect of a second signal edge in the first control signal. Therefore, the signal noise in the touch sensing layer caused by the signal changes represented by the first and second signal edges on the first and second control signal lines can be reduced, the problem of touch function failure in the Oncell touch panel caused by the coupling capacitance between the control signal line and the touch sensing layer can be improved, and the touch effect of the touch panel can be enhanced. Attached Figure Description

[0069] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0070] Figure 1 is a schematic diagram of the structure of a touch panel in the related technology;

[0071] Figure 2 is a schematic diagram of the structure of a touch panel provided in an embodiment of this application;

[0072] Figure 3 is a schematic diagram of a clock signal level switching mode provided in an embodiment of this application;

[0073] Figure 4 is a schematic diagram of the noise generation area of ​​a touch panel in the related technology;

[0074] Figure 5 is a schematic diagram of the RXNoise waveform of a touch panel in the related technology;

[0075] Figure 6 is a timing diagram of a frame start signal in a related technology;

[0076] Figure 7 is a timing diagram of two pairs of frame start signals provided in an embodiment of this application;

[0077] Figure 8 is a timing diagram of a gate drive control signal provided in an embodiment of this application;

[0078] Figure 9 is a schematic diagram of a gate driving circuit provided in an embodiment of this application;

[0079] Figure 10 is a schematic diagram of the RX Noise waveform of a touch panel provided in an embodiment of this application;

[0080] Figure 11 is a schematic diagram of the Touch signal of the emission electrode of the NG sample in the related technology;

[0081] Figure 12 is a schematic diagram of the Touch signal of the transmitting electrode of the OK sample in the related technology;

[0082] Figure 13 is a schematic diagram of the TX noise waveform of a touch panel in the related technology;

[0083] Figure 14 is a timing diagram of a clock signal in a related technology;

[0084] Figure 15 is a waveform diagram of TX noise of a touch panel in the related technology;

[0085] Figure 16 is a waveform diagram of the TX Noise of the touch panel provided in the embodiment of this application;

[0086] Figure 17 is a schematic diagram of the coupling capacitance between the GOA signal line and the touch sensing layer in the related technology;

[0087] Figure 18 is a cross-sectional view of the first groove provided in an embodiment of this application;

[0088] Figure 19 is a schematic diagram of a single groove for setting a light-shielding layer according to an embodiment of this application;

[0089] Figure 20 is a schematic diagram of a light-shielding layer with a double groove provided in an embodiment of this application;

[0090] Figure 21 is a schematic diagram of a light-shielding layer with an annular groove provided in an embodiment of this application;

[0091] Figure 22 is a schematic diagram of a light-shielding layer with two annular grooves provided in an embodiment of this application. Specific Implementation

[0092] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0093] In some embodiments, multiple signals have a first level and a second level. The first level and the second level only represent that the signal level has two states, and do not represent that the first level or the second level has a specific value.

[0094] In the related technology of Oncell touch panels, in order to achieve thinner and lighter designs, the sensor pattern of the touch sensor layer is fabricated on the CF substrate. For example, a single layer of indium tin oxide (ITO) pattern is fabricated on the back of the CF substrate. When a user touches the ITO pattern, the parasitic capacitance on the ITO pattern changes. By detecting this capacitance change, the touch point of the finger is identified and a response is made.

[0095] Currently, some oncell touch panels are prone to touch panel (TP) noise, also known as TP noise. TP noise is related to the resistance fluctuation of the black matrix (BM). As shown in Figure 1, this is because the GOA signal line forms a coupling capacitance ΔC to the touch sensing layer through the BM. The coupling capacitance ΔC is between 0 and C1×C2 / (C1+C2), where C1 is the coupling capacitance between the GOA signal line and the BM, and C2 is the coupling capacitance between the BM and the touch sensing layer 20. The smaller the BM resistance, the stronger the coupling capacitance. When the signal of the GOA signal line changes, the coupling effect causes TP noise in the touch panel, resulting in touch function failure.

[0096] Figure 2 is a schematic diagram of the structure of a touch panel provided in an embodiment of this application. As shown in Figure 2, the touch panel includes: a display panel 10 and a touch sensing layer 20 disposed on the light-emitting side of the display panel 10. The display panel 10 includes a gate driving circuit and multiple control signal lines. The control signal lines are electrically connected to the gate driving circuit and are also used to connect to the timing control circuit of the touch panel.

[0097] The multiple control signal lines include a first control signal line and a second control signal line. The first control signal line is used to receive a first control signal sent by the timing control circuit at a first moment, and the second control signal line is used to receive a second control signal sent by the timing control circuit after a delay based on the first moment. The first control signal and the second control signal are gate drive control signals of the same type.

[0098] The gate drive control signal includes a first signal edge and a second signal edge. The control signal line receives the first signal edge earlier than the second signal edge. Within one frame, each first signal edge of the second control signal is aligned with one second signal edge of the first control signal. The first signal edge represents a signal transition from a first level to a second level, and the second signal edge represents a signal transition from a second level to a first level.

[0099] In some embodiments, the touch panel provided in this embodiment can be an on-cell touch panel, such as a touch sensing layer 20 (Touch Sensor) formed on the light-emitting side of the color filter (CF) substrate in the touch panel. The touch panel includes a display panel 10, which may include an array substrate and a CF substrate, and the touch sensing layer 20 is provided on the light-emitting side of the CF substrate.

[0100] In some embodiments, the display panel 10 includes a gate driving circuit and multiple control signal lines. The gate driving circuit includes cascaded gate driving units, such as GOA units. The control signal lines include GOA signal lines such as Frame Start (STV) signal lines and Clock (CLK) signal lines. The control signal lines are electrically connected to at least one gate driving unit. For example, the STV signal lines are electrically connected to the first-stage GOA unit, the second-stage GOA unit, and other GOA units in the cascaded GOA units, respectively. The CLK signal lines are electrically connected to multiple GOA units in the cascaded GOA units.

[0101] In some embodiments, the control signal line can also be electrically connected to the timing control circuit of the touch panel to receive gate drive control signals sent by the timing control circuit. These gate drive control signals include, for example, STV signals, CLK signals, and other GOA control signals. The timing control circuit of mobile phones and portable computers (Tablet PCs, TPCs) can be a display driver IC (DDIC), such as the GOA module of the DDIC, which can provide GOA control signals. For medium to large-sized display devices such as notebook computers (NBs), the gate drive control signals are jointly provided by a timing controller (TCON) and a level shifter (LS) chip.

[0102] In some embodiments, the first control signal line and the second control signal line are paired control signal lines, used to transmit the same type of gate drive control signal. Multiple control signal lines may include at least one pair of first and second control signal lines. Different pairs of control signal lines may transmit the same or different gate drive control signals; this application does not impose such limitations. For example, the first and second control signal lines may be a pair of STV signal lines, and / or, the first and second control signal lines may be a pair of CLK signal lines.

[0103] In some embodiments, the first control signal and the second control signal are gate drive control signals of the same type. The gate drive control signal includes a first signal edge and a second signal edge. The control signal line receives the first signal edge of the gate control signal earlier than the second signal edge. The first signal edge represents the signal transitioning from a first level to a second level, and the second signal edge represents the signal transitioning from a second level to a first level.

[0104] For example, a gate drive signal includes a rising edge and a falling edge. A rising edge represents a signal transition from a low level to a high level, and a falling edge represents a signal transition from a high level to a low level. If the first signal edge is a rising edge, then the second signal edge is a falling edge; or, if the first signal edge is a falling edge, then the second signal edge is a rising edge.

[0105] In some embodiments, the first time interval is the time interval corresponding to a first signal edge, and the second time interval is the time interval corresponding to a second signal edge. Within one frame, the first time interval corresponding to each first signal edge of the second control signal at least partially overlaps with the second time interval corresponding to a second signal edge of the first control signal, such that within one frame, each first signal edge of the second control signal is aligned with a second signal edge of the first control signal. For example, within one frame, each rising time interval of the second control signal at least partially overlaps with a falling time interval of the first control signal, where the rising time interval represents the time interval corresponding to the rising edge, and the falling time interval represents the time interval corresponding to the falling edge.

[0106] In some embodiments, the first control signal line is electrically connected to the timing control circuit and receives a first control signal sent by the timing control circuit at a first moment. The second control signal line is also electrically connected to the timing control circuit and receives a second control signal sent by the timing control circuit after a delay from the first moment. Since the second control signal is sent by the timing control circuit after the first control signal (i.e., at the first moment), when the signal transmission distance and time between the timing control circuit and each control signal line are approximately equal, the moment when the second control signal line receives the first first signal edge of the second control signal is later than the moment when the first control signal line receives the first first signal edge of the first control signal.

[0107] Furthermore, within one frame, each first signal edge of the second control signal has a corresponding second signal edge aligned with it. The first signal edge represents a signal transition from a first level to a second level, and the second signal edge represents a signal transition from a second level to a first level; that is, the first and second signal edges represent opposite signal change trends. Thus, the noise coupled to the signal in the touch sensing layer 20 by the first and second signal edges due to the coupling capacitance also has opposite trends. Consequently, the noise coupling effect of each first signal edge of the second control signal can be canceled out by the noise coupling effect of a second signal edge in the first control signal.

[0108] Therefore, the signal noise of the touch sensing layer 20 caused by the signal changes represented by the first signal edge and the second signal edge on the first control signal line and the second control signal line can be reduced, the problem of touch function failure of the Oncell touch panel caused by the coupling capacitance between the control signal line and the touch sensing layer 20 can be improved, and the touch effect of the touch panel can be improved.

[0109] As shown in Figure 1, the GOA signal line is the STV signal line, and a coupling capacitor is formed between the STV signal line and the touch sensing layer 20 through BM. When the STV signal on the STV signal line changes, the coupling effect causes noise to appear on the signal of the touch sensing layer 20. Furthermore, since the STV signal line is located at the edge outside the display area, the touch sensing signal closer to the edge is more easily affected, resulting in greater signal noise. For example, in some current touch panels, some receiving electrodes (RX) of the touch sensing layer 20 are close to the STV signal line in the edge area. The receiving electrode RX easily forms a coupling capacitor with the STV signal line, resulting in RX noise in part of the RX signal of the touch sensing layer 20, which changes with the STV signal.

[0110] Optionally, the first control signal line and the second control signal line are frame start signal lines, respectively.

[0111] Among them, the first control signal and the second control signal are frame start signals, and the frame start signal includes a first signal edge and a second signal edge;

[0112] The first signal edge of the second control signal received by the second control signal line is aligned with the second signal edge of the first control signal received by the first control signal line.

[0113] In some embodiments, the first control signal line and the second control signal line are paired STV signal lines, and multiple control signal lines include at least one pair of STV signal lines. The first control signal line and the second control signal line are used to transmit STV signals, that is, the first control signal and the second control signal are both STV signals. The frame start signal includes a rising edge and a falling edge. The first signal edge can be a rising edge, in which case the second signal edge is a falling edge; or, if the first signal edge is a falling edge, then the second signal edge is a rising edge.

[0114] In some embodiments, for a pair of STV signal lines, the second control signal line receives the first first signal edge of the second control signal later than the first control signal line receives the first first signal edge of the first control signal. Furthermore, the first signal edge of the second control signal received by the second control signal line is aligned with the second signal edge of the first control signal received by the first control signal line. This ensures that the coupling effect of the second signal edge of the first control signal to noise in each pair of STV signal lines is canceled out by the coupling effect of the first signal edge of the second control signal to noise.

[0115] Therefore, the signal noise of the touch sensing layer 20 caused by the signal changes represented by the first signal edge and the second signal edge on the paired STV signal lines can be reduced, the problem of touch function failure of the Oncell touch panel caused by the coupling capacitance between the STV signal lines and the touch sensing layer 20 can be improved, and the touch effect of the touch panel can be improved.

[0116] As shown in Figure 1, the GOA signal line is the CLK signal line, and a coupling capacitor is formed between the CLK signal line and the touch sensing layer 20 through the BM. When the CLK signal on the CLK signal line changes, the coupling effect causes noise to appear on the signal of the touch sensing layer 20. In addition, since the CLK signal line is located at the edge outside the display area, the touch sensing signal closer to the edge is more easily affected, and the generated signal noise is greater. For example, in some current touch panels, some of the emitter electrodes (TX) of the touch sensing layer 20 are close to the CLK signal line at the edge. The emitter electrode TX is prone to forming a coupling capacitor with the CLK signal line, so some of the TX signal of the touch sensing layer 20 has TX noise, which is manifested as TX noise existing in the blank area within one frame.

[0117] Optionally, the first control signal line and the second control signal line are clock signal lines, respectively.

[0118] Among them, the first control signal and the second control signal are clock signals. The clock signal is in a level switching mode during the blank area of ​​one frame time. The level switching mode represents the clock signal switching level state between the first level and the second level.

[0119] Each first signal edge of the second control signal received by the second control signal line is aligned with a second signal edge of the first control signal received by the first control signal line.

[0120] In some embodiments, the first control signal line and the second control signal line are paired CLK signal lines, and multiple control signal lines include at least one pair of CLK signal lines. The first control signal line and the second control signal line are used to transmit the CLK signal, that is, the first control signal and the second control signal are both CLK signals. The CLK signal is in a level-switching mode within the Blank area of ​​one frame, that is, the CLK signal switches between a first level and a second level. Therefore, the CLK signal still includes multiple rising edges and multiple falling edges in the Blank area. As shown in Figure 3, the CLK signal can continuously switch between VGH voltage and VGL voltage, such as 15 volts (V) for example, and VGL voltage such as -11V for example. The first signal edge can be a rising edge, in which case the second signal edge is a falling edge; or, if the first signal edge is a falling edge, then the second signal edge is a rising edge.

[0121] In some embodiments, for a pair of CLK signal lines, the second control signal line receives the first first signal edge of the second control signal later than the first control signal line receives the first first signal edge of the first control signal. Furthermore, each first signal edge of the second control signal received by the second control signal line is aligned with a second signal edge of the first control signal received by the first control signal line. This ensures that, within the Blank region of one frame in each pair of CLK signal lines, the noise coupling effect of each first signal edge of the second control signal can be canceled out by the noise coupling effect of a second signal edge of the first control signal.

[0122] In some embodiments, for paired CLK signal lines, the timing control circuit can send a first control signal (CLK signal) to the first control signal line at a first moment, and then send a second control signal (CLK signal) to the second control signal line after a half-clock period based on the first moment, so that the first signal edge of the second control signal is aligned with the second signal edge of the first control signal. Here, half a clock period refers to half of the period of the CLK signal.

[0123] Therefore, the signal noise of the touch sensing layer 20 caused by the signal changes represented by the first signal edge and the second signal edge on the paired CLK signal lines within the Blank area of ​​one frame time can be reduced. This can improve the problem of touch function failure of the Oncell touch panel caused by the coupling capacitance between the CLK signal line and the touch sensing layer 20, and improve the touch effect of the touch panel.

[0124] In related technologies, the GOA signal line is located in the side bezel area of ​​the touch panel. The touch sensing (Touch) signal closest to the side bezel area as shown in Figure 4 is most easily affected and generates the most noise.

[0125] Optionally, the display panel 10 includes a display area and a non-display area located outside the display area; the non-display area includes a first border area and a second border area disposed on the opposite side of the display area;

[0126] The gate driving circuit includes a first driving circuit and a second driving circuit; the first driving circuit is disposed in the first frame area, and the second driving circuit is disposed in the second frame area; the first driving circuit and the second driving circuit each include gate driving units cascaded together.

[0127] The multiple control signal lines include a pair of first control signal lines and second control signal lines; the first drive circuit is electrically connected to at least one pair of first control signal lines and second control signal lines, and the second drive circuit is electrically connected to at least one pair of first control signal lines and second control signal lines respectively.

[0128] In some embodiments, cascaded gate driving units, referred to as a first driving circuit and a second driving circuit, are respectively disposed on the two side bezel areas of the touch panel. Specifically, the gate driving circuit includes a first driving circuit and a second driving circuit, with the first driving circuit disposed in the first bezel area and the second driving circuit disposed in the second bezel area. The first bezel area and the second bezel area are the two side bezel areas opposite to the display area within the non-display area, that is, the first bezel area and the second bezel area are disposed on opposite sides of the display area.

[0129] In some embodiments, the multiple control signal lines include pairs of first control signal lines and second control signal lines. For example, the multiple control signal lines include pairs of STV signal lines and / or pairs of CLK signal lines. A first drive circuit is electrically connected to at least one pair of STV signal lines and / or at least one pair of CLK signal lines. A second drive circuit is electrically connected to at least one pair of STV signal lines and / or at least one pair of CLK signal lines.

[0130] In this configuration, the same pair of control signal lines are connected to the drive circuits in the same side bezel area. Thus, with coupling capacitors formed between the same pair of control signal lines and the touch sensing layer 20, by adjusting the timing of the gate drive control signals on the same pair of control signal lines, the signal noise of the touch sensing layer 20 caused by signal changes represented by the first and second signal edges on the same pair of control signal lines can cancel each other out, thereby reducing touch panel noise and improving the touch panel's touch performance.

[0131] Table 1 Touch signal of the RX electrode before improvement

[0132] As shown in Table 1, RX1 is the set of receiving electrodes RX closest to the side frame area of ​​the first driving circuit, and RX25 is the set of receiving electrodes RX closest to the side frame area of ​​the second driving circuit. Table 1 shows the Touch signals corresponding to RX1 and RX25, respectively. Due to the coupling capacitance between the receiving electrodes RX and the STV signal line, the signal noise generated on the two sets of receiving electrodes RX1 and RX25 near the side frame areas is more obvious.

[0133] Figure 5 is a schematic diagram of the RX noise waveform of a touch panel in related technologies. As shown in Figure 5, it compares the RX noise waveforms of the two sets of receiving electrodes RX1 and RX25 on two touch panels. Both sets of receiving electrodes RX1 and RX25 exhibit significant noise, which varies with the STV signal. Specifically, near the rising and falling edges of the STV signal, the maximum voltage value of the Touch signal for RX1 corresponding to the first touch panel is 174 mV, and the minimum is -46 mV. The maximum voltage value of the Touch signal for RX1 corresponding to the second touch panel is 128 mV, and the minimum is -28 mV. In Figure 5, the RX noise of the first touch panel is larger than that of the second touch panel.

[0134] Optionally, the multiple control signal lines include two pairs of first control signal lines and second control signal lines, wherein the first control signal lines and the second control signal lines are frame start signal lines, respectively.

[0135] The first pair of frame start signal lines are disposed in the first border area. In the first pair of frame start signal lines, the first control signal line is electrically connected to at least one gate driving unit in the first driving circuit, and the second control signal line is electrically connected to at least one gate driving unit in the first driving circuit. In the first pair of frame start signal lines, the first control signal line receives the first control signal sent by the timing control circuit at the first sub-time.

[0136] The second pair of frame start signal lines are disposed in the second border area. In the second pair of frame start signal lines, the first control signal line is electrically connected to at least one gate driving unit in the second driving circuit, and the second control signal line is electrically connected to at least one gate driving unit in the second driving circuit. In the second pair of frame start signal lines, the first control signal line receives a first control signal sent by the timing control circuit at a second sub-time. The first time includes a first sub-time and a second sub-time. The time difference between the first sub-time and the second sub-time is one line scan duration.

[0137] In some embodiments, the multiple control signal lines include two pairs of STV signal lines. The first pair of STV signal lines is disposed in the first frame area where the first driving circuit is located. Specifically, the first pair of STV signal lines includes a first control signal line and a second control signal line. The first control signal line is electrically connected to at least one gate driving unit in the first driving circuit, and the second control signal line is also electrically connected to at least one gate driving unit in the first driving circuit. The second pair of STV signal lines is disposed in the second frame area where the second driving circuit is located. Specifically, the second pair of STV signal lines includes a first control signal line and a second control signal line. The first control signal line is electrically connected to at least one gate driving unit in the second driving circuit, and the second control signal line is also electrically connected to at least one gate driving unit in the second driving circuit.

[0138] As shown in Figure 1, the STV signal lines in the side bezel areas of the display panel 10 and the receiving electrodes RX of the touch sensing layer 20 near the side bezel areas may form coupling capacitors through the BM. In this embodiment, by adjusting the STV signal driving timing on the paired STV signal lines, the first signal edge of the second control signal (i.e., the STV signal) received by the second control signal line in the paired STV signal lines is aligned with the second signal edge of the first control signal (i.e., the STV signal) received by the first control signal line. This ensures that the noise coupling effect of the second signal edge in the first control signal of the paired STV signal lines cancels out the noise coupling effect of the first signal edge in the second control signal.

[0139] In some embodiments, for the first pair of STV signal lines in the first frame area, when a coupling capacitance is formed between the first pair of STV signal lines and the receiving electrode RX of the touch sensing layer 20 near the first frame area, the coupling effect of the second signal edge in the first control signal on the noise is canceled out by the coupling effect of the first signal edge in the second control signal on the noise. This can reduce the noise generated by the coupling of the signal on the receiving electrode RX of the touch sensing layer 20 near the first frame area due to signal changes on the first pair of STV signal lines.

[0140] In some embodiments, for the second pair of STV signal lines in the second frame area, when a coupling capacitance is formed between the second pair of STV signal lines and the receiving electrode RX of the touch sensing layer 20 near the second frame area, the coupling effect of the second signal edge in the first control signal on the noise cancels out the coupling effect of the first signal edge in the second control signal on the noise, thereby reducing the noise generated by the coupling of the signal on the second pair of STV signal lines to the receiving electrode RX of the touch sensing layer 20 near the second frame area.

[0141] Figure 6 is a timing diagram of a frame start signal in related technologies. As shown in Figure 6, for the four STV signals STV1 to STV4, the rising and falling edges of each STV signal affect the signal of the receiving electrode RX. Furthermore, the rising edge of the STV signal pulls the signal to generate positively changing noise, while the falling edge of the STV signal pulls the signal to generate negatively changing noise. That is, the noise trends coupled onto the signal of the touch sensing layer 20 by the rising and falling edges are different.

[0142] In some embodiments, in the first pair of frame start signal lines, the first control signal line receives a first control signal sent by the timing control circuit at a first sub-time, and the second control signal line receives a second control signal sent by the timing control circuit after a delay based on the first sub-time. For example, as shown in FIG7, the first control signal received by the first pair of frame start signal lines is a frame start signal STV1, and the second control signal is a frame start signal STV3. In the second pair of frame start signal lines, the first control signal line receives a first control signal sent by the timing control circuit at a second sub-time, and the second control signal line receives a second control signal sent by the timing control circuit after a delay based on the second sub-time. For example, as shown in FIG7, the first control signal received by the second pair of frame start signal lines is a frame start signal STV2, and the second control signal is a frame start signal STV4.

[0143] In some embodiments, the transmission time corresponding to the first control signal received by the first control signal line of the first pair of frame start signal lines is the first sub-time, and the transmission time corresponding to the first control signal received by the first control signal line of the second pair of frame start signal lines is the second sub-time. The transmission times of the first control signals corresponding to the two pairs of frame start signal lines differ by one line scan duration; that is, the time difference between the first sub-time and the second sub-time is one line scan duration. Thus, the two pairs of frame start signals transmitted by the two pairs of frame start signal lines respectively drive the first driving circuit and the second driving circuit of the two side frame regions.

[0144] For example, as shown in Figure 7, the time difference between the frame start signal STV1 and the frame start signal STV2 is one line scan duration (1H). In Figure 7, in the first pair of STV signals, the pull effect of the falling edge of the STV1 signal on RX Noise cancels out the pull effect of the rising edge of the STV3 signal on RX Noise. Similarly, in the second pair of STV signals, the pull effect of the falling edge of the STV2 signal on RX Noise cancels out the pull effect of the rising edge of the STV4 signal on RX Noise. Referring to Figure 7, the signal noise of the receiving electrode RX is significantly improved.

[0145] In some embodiments, taking the frame start signals STV1 and STV3 shown in Figure 6 as examples, the time difference between the rising edge of the STV1 signal and the rising edge of the STV3 signal is 2H in related technologies. In this embodiment, in order to align the rising edge of the STV3 signal with the falling edge of the STV1 signal, the STV1 signal can be sent 2H earlier than the STV3 signal, or the STV3 signal can be sent 2H later than the STV1 signal, as shown in Figure 7. The same applies to the STV2 and STV4 signals, and will not be elaborated here.

[0146] Optionally, the cascaded gate drive units include: a first redundant unit, a second redundant unit, and N cascaded gate drive units; where N is a positive integer;

[0147] The first redundant unit is cascaded with the first-stage gate drive unit among the N gate drive units, and the second redundant unit is cascaded with the second-stage gate drive unit among the N gate drive units.

[0148] The first control signal line and the second control signal line are frame start signal lines, respectively. The first control signal line is electrically connected to the first redundancy unit, and the second control signal line is electrically connected to the second redundancy unit.

[0149] The display panel 10 also includes multiple clock signal lines, which are used to connect to the timing control circuit and receive clock signals sent by the timing control circuit.

[0150] Multiple clock signal lines include a first clock signal line and a second clock signal line. The first clock signal line is electrically connected to the gate drive unit of the first stage, and the second clock signal line is electrically connected to the gate drive unit of the second stage.

[0151] The first clock signal line receives the clock signal sent by the timing control circuit at the second moment, and the time difference between the second moment and the first moment is four line scan durations; the second clock signal line receives the clock signal sent by the timing control circuit at the third moment, and the time difference between the third moment and the second moment is two line scan durations.

[0152] In some embodiments, redundant drive units can be provided in the gate drive circuit. For example, the gate drive circuit may include a dummy GOA unit. The redundant drive units are cascaded with the normal gate drive units, and the STV signal line is electrically connected to the redundant drive units. Thus, the timing drive method proposed in this embodiment is realized by coordinating the STV signal and the CLK signal to drive the gate drive circuit.

[0153] In some embodiments, the first driving circuit and the second driving circuit each include cascaded gate driving units, that is, the first frame region and the second frame region are respectively provided with cascaded gate driving units. The driving circuit structures of the two frame regions are similar. The following describes the structure of the gate driving circuit in this embodiment using the cascaded relationship of the driving units in one frame region as an example. Specifically, for one frame region, before the N cascaded gate driving units, two redundant driving units are provided, namely the first redundant unit and the second redundant unit. The first redundant unit is cascaded with the first-stage gate driving unit among the N gate driving units, and the second redundant unit is cascaded with the second-stage gate driving unit among the N gate driving units.

[0154] In this configuration, the output terminal of the first redundant unit is electrically connected to the input terminal of the first-stage gate driving unit, and the output terminal of the first-stage gate driving unit is electrically connected to the reset terminal of the first redundant unit. Therefore, the first redundant unit and the first-stage gate driving unit form a group of driving units. Furthermore, the first control signal line is a frame start signal line, and the first redundant unit is electrically connected to the first control signal line, enabling it to receive the first control signal, i.e., the STV signal. This allows the first redundant unit and the first-stage gate driving unit to be controlled by a single STV signal.

[0155] In this configuration, the output of the second redundant unit is electrically connected to the input of the second-stage gate drive unit, and the output of the second-stage gate drive unit is electrically connected to the reset terminal of the second redundant unit. Therefore, the second redundant unit and the second-stage gate drive unit form a group of drive units. Furthermore, the second control signal line is a frame start signal line, and the second redundant unit is electrically connected to the second control signal line, enabling it to receive the second control signal, i.e., the STV signal. This allows the second redundant unit and the second-stage gate drive unit to be controlled by a single STV signal.

[0156] In some embodiments, the display panel 10 further includes multiple CLK signal lines, which are used to connect to a timing control circuit and can receive CLK signals sent by the timing control circuit. In the cascaded N gate driving units, the first-stage gate driving unit is electrically connected to a first clock signal line among the multiple CLK signal lines, and the second-stage gate driving unit is electrically connected to a second clock signal line among the multiple CLK signal lines. Furthermore, a first redundant unit can be electrically connected to a third clock signal line among the multiple CLK signal lines, and a second redundant unit can be electrically connected to a fourth clock signal line among the multiple CLK signal lines.

[0157] In some embodiments, the time difference between the transmission time corresponding to the STV signal received by the first redundancy unit and the transmission time corresponding to the STV signal received by the second redundancy unit can be four line scan durations, i.e., 4H.

[0158] For example, the first redundant unit and the gate driving unit of the first stage form a group of driving units. The first clock signal line receives the CLK signal sent by the timing control circuit at a second time, with a time difference of 4H between the second and first times. The transmission time corresponding to the CLK signal received by the third clock signal line connected to the first redundant unit is 4H different from the second time. The second redundant unit and the gate driving unit of the second stage form a group of driving units. The second clock signal line receives the CLK signal sent by the timing control circuit at a third time, with a time difference of 2H between the third and second times. The transmission time corresponding to the CLK signal received by the fourth clock signal line connected to the second redundant unit is 4H different from the third time.

[0159] Figure 8 is a timing diagram of a gate drive control signal provided in an embodiment of this application. As shown in Figure 8, the driving method provided in this embodiment can be achieved by shifting the STV1 and STV2 signals forward by 2H. Specifically, among the four STV signals STV1 to STV4, STV1 and STV3 are a pair of STV signals transmitted by a pair of STV signal lines, and STV2 and STV4 are a pair of STV signals transmitted by a pair of STV signal lines. The time difference between the rising edge of STV1 and the rising edge of STV3 is 4H, and the time difference between the rising edge of STV2 and the rising edge of STV4 is 4H. Furthermore, the time difference between the rising edge of STV1 and the rising edge of STV2 is 1H.

[0160] Figure 8 shows the timing of eight CLK signals. The first clock signal line can receive the CLK1 signal shown in Figure 8, and the second clock signal line can receive the CLK3 signal shown in Figure 8. The time difference between the rising edge of the CLK1 signal and the rising edge of the CLK3 signal is 2H. Furthermore, the third clock signal line connected to the first redundancy unit can receive the CLK5 signal shown in Figure 8, and the fourth clock signal line connected to the second redundancy unit can receive the CLK7 signal shown in Figure 8. The time difference between the rising edge of the CLK1 signal and the rising edge of the CLK5 signal is 4H.

[0161] In some embodiments, in the cascaded gate drive units, since the last gate drive unit does not have an output signal from the next stage drive unit as a reset signal, a redundant drive unit can be set after the cascaded gate drive units. The redundant drive unit provides a reset signal for the last gate drive unit.

[0162] Figure 9 is a schematic diagram of a gate driving circuit provided in an embodiment of this application. As shown in Figure 9, cascaded gate driving units, multiple STV signal lines, and multiple CLK signal lines are respectively arranged in the two side bezel areas of the display panel 10. Taking one side bezel area as an example, redundant driving units, such as dummy GOA units, are arranged at the start and end positions of the cascade relationship. The redundant driving units at the start position include a first redundant unit and a second redundant unit, and the redundant driving units at the end position can be referred to as a third redundant unit and a fourth redundant unit.

[0163] As shown in Figure 9, the third redundant unit is electrically connected to the first control signal line of a pair of STV signal lines, and the third redundant unit is cascaded with the second-to-last gate drive unit. The fourth redundant unit is electrically connected to the second control signal line of the pair of STV signal lines, and the fourth redundant unit is cascaded with the last-to-last gate drive unit. The display panel 10 also includes CLK1 to CLK8 signal lines, each CLK signal line being electrically connected to multiple gate drive units. In Figure 9, the CLK1 signal line is electrically connected to the first-stage gate drive unit, the CLK3 signal line is electrically connected to the second-stage gate drive unit, the CLK5 signal line is electrically connected to the first redundant unit, and the CLK7 signal line is electrically connected to the second redundant unit. The circuit structure and connection relationship of the second drive circuit shown on the right side of Figure 9 are similar to those of the first drive circuit, and will not be described again here.

[0164] Figure 10 is a schematic diagram of the RXNoise waveform of a touch panel provided in an embodiment of this application. As shown in Figure 10, the RXNoise waveforms of the two sets of receiving electrodes RX1 and RX25 are shown. Compared with Figure 5, in Figure 10, near the rising and falling edges of the STV signal, the maximum voltage value of the Touch signal of receiving electrode RX1 is 89mV and the minimum is -9mV, and the maximum voltage value of the Touch signal of receiving electrode RX25 is 72mV and the minimum is -63mV.

[0165] Furthermore, as shown in Table 2, the Touch signals corresponding to RX1 and RX25 on the touch panel provided in this embodiment have reduced noise compared to the signals in Table 1. This demonstrates that by adjusting the driving timing of the STV signals transmitted through the paired STV signal lines, the coupling effect of the rising and falling edges of the pair of STV signals on noise is mutually canceled, thus improving the signal noise of the receiving electrode RX.

[0166] Table 2 Touch signal of the improved RX electrode

[0167] In related technologies, as shown in Figure 11, TX01 is the set of emitter electrodes closest to the side frame area of ​​the first driving circuit, and TX14 is the set of emitter electrodes closest to the side frame area of ​​the second driving circuit. Figure 11 shows the Touch signals corresponding to TX01 and TX14, respectively. Due to the coupling capacitance between the emitter electrodes and the CLK signal line, the signal noise generated on the two sets of emitter electrodes TX01 and TX14 near the side frame areas is more obvious. For example, in practical applications, the Touch signal of NG samples is mostly between 50 and 150, while the Touch signal of OK samples is below 50, as shown in the Touch signals corresponding to TX01 and TX14 in Figure 12.

[0168] Figure 13 is a schematic diagram of the TX Noise waveform of a touch panel in related technologies. As shown in Figure 13, it compares the TX Noise waveforms of the emitting electrodes on two touch panels. There is significant signal noise on the TX emitting electrodes near the side bezels, and the TX Noise exists in the Blank area within one frame. The amplitude of the TX Noise corresponding to the first touch panel is 500mV, and the amplitude of the TX Noise corresponding to the second touch panel is 160mV. In Figure 13, the TX Noise of the first touch panel is larger than that of the second touch panel.

[0169] As shown in Figure 1, the CLK signal lines in the side bezel areas of the display panel 10 may form coupling capacitors with the emitter electrodes TX of the touch sensing layer 20 near the side bezel areas through the BM. In this embodiment, by adjusting the driving timing between the CLK signals on the paired CLK signal lines, each first signal edge of the second control signal (i.e., the CLK signal) received by the second control signal line in the paired CLK signal lines is aligned with a second signal edge of the first control signal (i.e., the CLK signal) received by the first control signal line. This ensures that the noise coupling effect of the first signal edge of the second control signal in the paired CLK signal lines cancels out the noise coupling effect of the second signal edge in the first control signal.

[0170] In some embodiments, the CLK signals on paired CLK signal lines are in a level-switching mode during the blank area of ​​a frame, causing the CLK signal to switch between a first level and a second level. For example, the CLK setting in the Blank area changes from VGL mode to Toggle mode. Toggle mode is the level-switching mode in this embodiment, indicating that the CLK signal continuously switches between high and low levels.

[0171] Figure 14 is a timing diagram of a clock signal in the related technology. As shown in Figure 14, the two CLK signals are set to VGL mode in the Blank region, that is, the CLK signal maintains the VGL voltage in the Blank region. Due to the coupling capacitance between the CLK signal line and the emitter electrode TX, when the two CLK signals enter the Blank region, the changes in the CLK signals will couple corresponding trend noise onto the signal of the emitter electrode TX.

[0172] The timing relationship of the clock signal in this embodiment is shown in Figure 3. For the CLK signals transmitted on the paired CLK signal lines, since the CLK signal in the Blank area is set to a level switching mode, and the time difference between the transmission times of a pair of CLK signals is half a clock cycle, the noise pull of the rising and falling edges of a pair of CLK signals can cancel each other out within the Blank area of ​​one frame. Therefore, the signal noise of the transmit electrode TX caused by the CLK signals transmitted on the paired CLK signal lines in the Blank area can be reduced. As shown in Figure 3, compared with the Touch signal shown in Figure 14, the noise corresponding to the Blank area of ​​the CLK signal is improved.

[0173] Figure 15 is a waveform diagram of TXNoise in a touch panel of related technology. As shown in Figure 15, it illustrates the CLK signal waveform in VGL mode in the Blank area, the STV signal waveform corresponding to the CLK signal, and the Touch signal waveform on the emitter electrode TX near the bezel. In Figure 15, a large amount of noise is generated in the Blank area of ​​the CLK signal on the Touch signal due to the coupling capacitance, with a noise amplitude of 770mV.

[0174] Figure 16 is a waveform diagram of the TXNoise of the touch panel provided in the embodiment of this application. As shown in Figure 16, it shows the CLK signal waveform in the Blank area using level switching mode, the STV signal waveform corresponding to the CLK signal, and the Touch signal waveform on the emitter electrode TX near the frame area. In Figure 16, the signal noise amplitude of the CLK signal in the Blank area of ​​the Touch signal is reduced to 330mV.

[0175] In some embodiments, for the gate drive circuit shown in FIG9, the CLK signal transmitted by the CLK signal line in the Blank region can also be set to a level switching mode, such as the Toggle mode. In the case where there is a coupling capacitance between the CLK signal line and the emitter electrode TX of the touch sensing layer 20 in the gate drive circuit shown in FIG9, the noise pull effect of the paired rising and falling edges of the CLK signal cancels each other out, thereby reducing the Touch signal noise corresponding to the Blank region of the CLK signal.

[0176] As shown in Figure 17, the coupling capacitance ΔC between the GOA signal line and the touch sensing layer 20 can be obtained by the following formula (1): ΔC=C1×C2 / (C1+C2+2π×f×C1×C2×R) (1)

[0177] Wherein, capacitor C1 represents the coupling capacitance between the GOA signal line and BM, capacitor C2 represents the coupling capacitance between BM and the touch sensing layer 20, resistor R is the BM resistance, and f is the frequency of the GOA control signal. As shown in formula (1), the coupling capacitance ΔC is inversely proportional to the resistance R of BM. When the resistance decreases, the coupling effect between the GOA signal line and the touch sensing layer 20 increases, leading to increased signal noise and making TPNoise more likely. In related technologies, the resistance R of BM in OK samples is much greater than that in NG samples. For example, the resistance R of BM in OK samples is 6 megohms (MΩ), while the resistance R of BM in NG samples is 0.08 MΩ.

[0178] Optionally, the display panel 10 includes a first display substrate 101 and a second display substrate 102; a gate driving circuit and multiple control signal lines are disposed in the first display substrate 101, and a touch sensing layer 20 is disposed on the side of the second display substrate 102 opposite to the first display substrate 101.

[0179] The display panel 10 further includes a light-shielding layer 103 disposed on the side of the second display substrate 102 near the first display substrate 101; the light-shielding layer 103 includes a first groove 1031.

[0180] The orthographic projection of the first groove 1031 on the first surface is the first orthographic projection, the orthographic projection of the control signal line on the first surface is the second orthographic projection, and the orthographic projection of the touch sensing layer 20 on the first surface is the third orthographic projection; the first surface is the surface of the second display substrate 102 on the side close to the first display substrate 101.

[0181] There is no overlap between the second orthographic projection and the third orthographic projection; the first orthographic projection is located between the second orthographic projection and the third orthographic projection, so that the first groove 1031 disconnects the coupling capacitance between the control signal line and the touch sensing layer 20.

[0182] In some embodiments, the first display substrate 101 may be an array substrate, with the gate driving circuit and multiple control signal lines disposed in the array substrate. The second display substrate 102 may be a CF substrate, with the touch sensing layer 20 disposed on the side of the CF substrate facing away from the first display substrate 101. A light-shielding layer 103 may also be included on the side of the second display substrate 102 near the first display substrate 101, such as the BM shown in FIG. 1. This is merely illustrative, and the embodiments of this application are not intended to limit the scope of the invention.

[0183] In some embodiments, by providing a first groove 1031 on the side of the light-shielding layer 103 near the control signal line, the side of the light-shielding layer 103 near the control signal line is isolated, avoiding the control signal line from forming a coupling capacitor between the light-shielding layer 103 and the touch sensing layer 20, thereby isolating the gate drive control signal from the touch sensing signal, reducing Touch signal noise, and improving the touch effect of the touch panel.

[0184] Specifically, multiple control signal lines of the first display substrate 101 are located in the border area outside the display area, while the touch sensing layer 20 can cover the display area. There is no overlap between the second orthographic projection of the control signal lines on the first surface and the third orthographic projection of the touch sensing layer 20 on the first surface. That is, a coupling capacitor is not directly formed between the control signal lines and the touch sensing layer 20. Instead, as shown in Figure 1, a coupling capacitor is formed between the GOA signal lines and the touch sensing layer 20 through BM.

[0185] In some embodiments, the coupling capacitance between the control signal line and the touch sensing layer 20 is broken by disposing the first groove 1031 between the control signal line and the touch sensing layer 20. Specifically, the first orthographic projection of the first groove 1031 on the first surface of the light-shielding layer 103 is located between the second and third orthographic projections. This isolates the side of the light-shielding layer 103 closest to the control signal line, preventing the control signal line from forming a coupling capacitance with the touch sensing layer 20 through the light-shielding layer 103.

[0186] Optionally, the multiple control signal lines include a frame start signal line; the touch sensing layer 20 includes a first electrode;

[0187] The orthographic projection of the first electrode on the first surface is the first sub-projection, and the third orthographic projection includes the first sub-projection;

[0188] The second orthographic projection corresponding to the frame start signal line does not overlap with the first sub-projection; the first orthographic projection is located between the first sub-projection and the second orthographic projection corresponding to the frame start signal line, so that the first groove 1031 disconnects the coupling capacitance between the frame start signal line and the first electrode.

[0189] In some embodiments, the first electrode can be a receiving electrode RX, and the touch sensing layer 20 can include multiple receiving electrodes RX. As shown in FIG1, the GOA signal line is an STV signal line, and the receiving electrode RX near the edge area on the touch sensing layer 20 is prone to forming a coupling capacitance with the STV signal line. In this embodiment, by providing a first groove 1031 of the light-shielding layer 103 between the STV signal line and the receiving electrode RX, the first groove 1031 disconnects the coupling capacitance between the STV signal line and the receiving electrode RX.

[0190] Specifically, the side of the touch sensing layer 20 near the STV signal line may include multiple receiving electrodes RX. The second orthographic projection of the STV signal line on the first surface does not overlap with the first sub-projection of the multiple receiving electrodes RX on the first surface. By disposing the first groove 1031 between the STV signal line and the receiving electrodes RX of the touch sensing layer 20, the coupling capacitance between the STV signal line and the receiving electrodes RX is broken. The first orthographic projection of the first groove 1031 of the light-shielding layer 103 on the first surface is located between the first sub-projection corresponding to the receiving electrodes RX and the second orthographic projection corresponding to the STV signal line.

[0191] In this way, the first groove 1031 isolates the side of the light-shielding layer 103 near the STV signal line, preventing the STV signal line from forming a coupling capacitance with the receiving electrode RX of the touch sensing layer 20 through the light-shielding layer 103. This isolates the STV signal from the signal of the receiving electrode RX, avoiding RX noise caused by the coupling of the STV signal signal transformation to the signal of the receiving electrode RX.

[0192] Optionally, the multiple control signal lines include clock signal lines; the touch sensing layer 20 includes a second electrode;

[0193] The orthographic projection of the second electrode onto the first surface is the second sub-projection, and the second orthographic projection includes the second sub-projection;

[0194] The first orthographic projection corresponding to the clock signal line does not overlap with the second sub-projection; the first orthographic projection is located between the second sub-projection and the second orthographic projection corresponding to the clock signal line, so that the first groove 1031 disconnects the coupling capacitance between the clock signal line and the second electrode.

[0195] In some embodiments, the second electrode can be a transmitting electrode TX, and the touch sensing layer 20 can include multiple transmitting electrodes TX. As shown in FIG1, the GOA signal line is the CLK signal line, and the transmitting electrode TX near the edge area on the touch sensing layer 20 is prone to forming a coupling capacitance with the CLK signal line. In this embodiment, by providing a first groove 1031 of the light-shielding layer 103 between the CLK signal line and the transmitting electrode TX, the first groove 1031 disconnects the coupling capacitance between the CLK signal line and the transmitting electrode TX.

[0196] Specifically, the side of the touch sensing layer 20 near the CLK signal line may include multiple emitter electrodes TX. The second orthographic projection of the CLK signal line on the first surface does not overlap with the second sub-projections of the multiple emitter electrodes TX on the first surface. The coupling capacitance between the CLK signal line and the emitter electrodes TX is broken by disposing a first groove 1031 between the CLK signal line and the emitter electrodes TX of the touch sensing layer 20. Specifically, the first orthographic projection of the first groove 1031 of the light-shielding layer 103 on the first surface is located between the second sub-projection corresponding to the emitter electrodes TX and the second orthographic projection corresponding to the CLK signal line.

[0197] In this way, the first groove 1031 isolates the side of the light-shielding layer 103 near the CLK signal line, preventing the CLK signal line from forming a coupling capacitance with the emitter electrode TX of the touch sensing layer 20 through the light-shielding layer 103. This isolates the CLK signal from the signal of the emitter electrode TX, avoiding TX noise caused by the coupling of the CLK signal signal transformation to the signal of the emitter electrode TX.

[0198] Optionally, the first display substrate 101 includes a display area and a non-display area located outside the display area; the non-display area includes a first border area and a second border area disposed on the opposite side of the display area;

[0199] The control signal line is located in the first frame area, and the light-shielding layer 103 includes at least one first groove 1031 on the side near the first frame area;

[0200] And / or,

[0201] The control signal line is located in the second frame area, and the light-shielding layer 103 includes at least one first groove 1031 on the side near the second frame area.

[0202] In some embodiments, the gate driving circuit can be located in a side bezel area outside the display area, and multiple control signal lines can be located in the side bezel area where the gate driving circuit is located. Alternatively, the gate driving circuit can be located in both side bezel areas outside the display area, namely the first bezel area and the second bezel area, and the control signal lines can be located in the first bezel area and the second bezel area respectively.

[0203] In some embodiments, when a control signal line is provided in the first frame area, at least one first groove 1031 needs to be provided on the side of the light-shielding layer 103 near the first frame area, so that the first groove 1031 disconnects the coupling capacitance between the control signal line and the touch sensing layer 20. The same applies to the second frame area, which will not be described in detail here. In addition, when both the first frame area and the second frame area are provided with control signal lines, at least one first groove 1031 can be provided in the first frame area and the second frame area respectively.

[0204] In this way, the side of the touch sensing layer 20 near the frame area can be prevented from forming a coupling capacitor with the control signal line in the frame area through the light shielding layer 103. The gate drive control signal can be isolated from the touch sensing signal, reducing the signal noise of touch sensing. Therefore, the touch effect of the touch panel can be improved.

[0205] Optionally, the light-shielding layer 103 includes two first grooves 1031 on the side near the first frame area, and the first orthographic projections corresponding to the two first grooves 1031 do not overlap;

[0206] And / or,

[0207] The side of the light-shielding layer 103 near the second frame area includes two first grooves 1031, and the first orthographic projections corresponding to the two first grooves 1031 do not overlap.

[0208] In some embodiments, the two first grooves 1031 are not interconnected. The side of the light-shielding layer 103 near the first frame area includes two first grooves 1031, and the first orthographic projection corresponding to the first first groove 1031 does not overlap with the first orthographic projection corresponding to the second first groove 1031. The side of the light-shielding layer 103 near the second frame area includes two first grooves 1031, and the first orthographic projection corresponding to the first first groove 1031 does not overlap with the first orthographic projection corresponding to the second first groove 1031.

[0209] Figure 18 is a cross-sectional view of the first groove 1031 provided in an embodiment of this application, showing the cross-section of the light-shielding layer 103, i.e., BM, near the GOA signal line along a direction perpendicular to the first surface. The rectangle at the break in BM represents the cross-section of the first groove 1031. In Figure 18, two first grooves 1031 are provided near one side edge of BM. The two first grooves 1031 are located between the GOA signal line and the touch sensing layer 20, and the two first grooves 1031 are not connected to each other. As shown in Figure 18, the GOA signal line and BM form a capacitor C1, and BM and the touch sensing layer 20 form a capacitor C2. However, due to the presence of the two first grooves 1031, capacitors C1 and C2 are disconnected, so the GOA signal line cannot form a coupling capacitor with the touch sensing layer 20 through BM.

[0210] Optionally, the first orthographic projection overlaps with at most one of the second orthographic projection and the third orthographic projection.

[0211] In some embodiments, the first orthographic projection of the first groove 1031 of the light-shielding layer 103 on the first surface is located between the second and third orthographic projections. The first orthographic projection may not overlap with either the second or third orthographic projections, or it may overlap with only one of the second or third orthographic projections. This avoids the problem of the light-shielding layer 103 near the control signal line losing its light-shielding effect due to an unreasonable size setting of the first groove 1031.

[0212] In some embodiments, for the first border area, the first orthographic projection corresponding to the first first groove 1031 overlaps with the second orthographic projection, and / or, the first orthographic projection corresponding to the second first groove 1031 overlaps with the third orthographic projection. For the second border area, the first orthographic projection corresponding to the first first groove 1031 overlaps with the second orthographic projection, and / or, the first orthographic projection corresponding to the second first groove 1031 overlaps with the third orthographic projection.

[0213] As shown in Figure 18, in the two first grooves 1031, the first orthographic projection corresponding to one first groove 1031 overlaps with the second orthographic projection corresponding to the GOA signal line, and the first orthographic projection corresponding to the other first groove 1031 overlaps with the third orthographic projection corresponding to the touch sensing layer 20.

[0214] Optionally, the shape of the first orthographic projection is a rectangle; the length of the first edge of the first orthographic projection is a first length;

[0215] The light-shielding layer 103 has an overlapping area between its orthographic projection on the first surface and its second orthographic projection, and the length of the second edge of the overlapping area is the second length.

[0216] The first length is not less than the second length.

[0217] In some embodiments, the light-shielding layer 103 covers the control signal lines of the outer frame area of ​​the display area. The orthographic projection of the light-shielding layer 103 on the first surface and the second orthographic projection corresponding to the control signal lines have an overlapping area. The length of the second edge of the overlapping area is approximately equal to the length of the frame area, for example, the length of the second edge is approximately equal to the length of the long side of the frame area.

[0218] In some embodiments, the length of the first groove 1031 can be approximately equal to the length of the long side of the border region, such that the first groove 1031 breaks the side of the light-shielding layer 103 near the border region into several parts, i.e., isolates them, preventing the control signal lines in the border region from forming a coupling capacitance with the touch sensing layer 20 through the light-shielding layer 103. Specifically, the shape of the first orthographic projection corresponding to the first groove 1031 is rectangular, for example, the projection shape can be a long rectangular strip. The first edge of the first orthographic projection can be the long side, and the second edge of the overlapping area can also be the long side. Furthermore, the first length is not less than the second length, so that the first groove 1031 can disconnect the coupling capacitance between the control signal lines and the touch sensing layer 20.

[0219] Taking the touch panel shown in Figure 4 as an example, the light-shielding layer 103 can be provided with a first groove 1031 near the upper and lower side bezels, as shown in Figure 19. Alternatively, the light-shielding layer 103 can be provided with two first grooves 1031 near the upper and lower side bezels, as shown in Figure 20. The planar projection shape of the first groove 1031 is a long rectangular strip. In practical applications, a single groove or a double groove can be cut into the BM. As shown in Figure 19, a single groove is cut into the side of the BM near the GOA signal line to obtain a first groove 1031, which is located between the GOA signal line and the touch sensing layer 20. Alternatively, as shown in Figure 20, a double groove is cut into the side of the BM near the GOA signal line to obtain two first grooves 1031. One first groove 1031 is located between the GOA signal line and the touch sensing layer 20, and the other first groove 1031 can be located above the array common electrode (VCOM) metal trace of the first display substrate 101.

[0220] Optionally, the non-display area also includes a third border area and a fourth border area disposed on the opposite side of the display area; the third border area is adjacent to the first border area and the second border area, respectively.

[0221] The light-shielding layer 103 includes at least one second groove 1032 on the side near the third border area, and the light-shielding layer 103 includes at least one second groove 1032 on the side near the fourth border area.

[0222] A second groove 1032 in the third border area is connected to a first groove 1031 in the first border area and a first groove 1031 in the second border area, respectively.

[0223] A second groove 1032 in the fourth border area is connected to a first groove 1031 in the first border area and a first groove 1031 in the second border area, respectively.

[0224] The first groove 1031 and the second groove 1032, which are interconnected, form an annular groove.

[0225] In some embodiments, where control signal lines are provided in both side frame areas, the light-shielding layer 103 includes at least one first groove 1031 on the side near the first frame area, and the light-shielding layer 103 also includes at least one first groove 1031 on the side near the second frame area. In this case, an annular groove can be provided on the light-shielding layer 103, the annular groove including the first groove 1031 near both side frame areas, and the second groove 1032 near the third and fourth frame areas respectively.

[0226] As shown in Figure 21, the light-shielding layer 103 includes an annular groove. Compared to the single grooves in the side frame areas shown in Figure 19, the annular groove in Figure 21 also includes two second grooves 1032 on the short side of the light-shielding layer 103. The second grooves 1032 are located on the light-shielding layer 103 in areas away from the touch sensing layer 20; that is, the fourth orthographic projection of the second groove 1032 on the first surface does not overlap with the third orthographic projection of the touch sensing layer 20. As shown in Figure 21, the planar projection of the annular groove is a ring-shaped rectangle, meaning the orthographic projection of the annular groove on the first surface is also a ring-shaped rectangle.

[0227] As shown in Figure 22, the light-shielding layer 103 includes two annular grooves. Compared to the double grooves dug in the side frame areas shown in Figure 20, each annular groove in Figure 22 includes two second grooves 1032 at the short side of the light-shielding layer 103.

[0228] This application also provides a display device, which includes a touch panel as described in the foregoing embodiments.

[0229] This application also provides a display driving method for driving a touch panel as described in the foregoing embodiments. The display driving method includes:

[0230] A first control signal is sent to a first control signal line at a first moment, and a second control signal is sent to a second control signal line based on a delay of the first moment, such that each first signal edge of the second control signal is aligned with a second signal edge of the first control signal within one frame time.

[0231] The first control signal and the second control signal are gate drive control signals of the same type. The gate drive control signal includes a first signal edge and a second signal edge. The control signal line receives the first signal edge earlier than the second signal edge. The first signal edge represents the signal transitioning from a first level to a second level, and the second signal edge represents the signal transitioning from a second level to a first level.

[0232] In some embodiments, the execution entity of the display driving method can be a timing control circuit. As in the aforementioned embodiments, the timing control circuit of the mobile phone and TPC can be a DDIC, such as the GOA module of the DDIC, which can provide GOA control signals. For medium and large-sized display devices such as notebooks, the gate drive control signals are jointly provided by the TCON and the LS chip.

[0233] Optionally, sending a first control signal to a first control signal line at a first moment, and sending a second control signal to a second control signal line based on a delay of the first moment, includes:

[0234] A first control signal is sent to a first control signal line at a first moment, and a second control signal is sent to a second control signal line based on a delay of the first moment, so that the first signal edge of the second control signal is aligned with the second signal edge of the first control signal;

[0235] The first control signal and the second control signal are frame start signals, which include a first signal edge and a second signal edge; different pairs of frame start signal lines correspond to different first moments.

[0236] In some embodiments, the first time points corresponding to different pairs of frame start signal lines are different. For example, multiple control signal lines include two pairs of frame start signal lines, and the first times points corresponding to the two pairs of frame start signal lines are a first sub-time point and a second sub-time point, respectively. The first time point includes the first sub-time point and the second sub-time point, and the time difference between the first sub-time point and the second sub-time point is 1H.

[0237] Optionally, sending a first control signal to a first control signal line at a first moment, and sending a second control signal to a second control signal line based on a delay of the first moment, includes:

[0238] A first control signal is sent to a first control signal line at a first moment, and a second control signal is sent to a second control signal line based on a delay of the first moment, such that each first signal edge of the second control signal is aligned with a second signal edge of the first control signal respectively;

[0239] Among them, the first control signal and the second control signal are clock signals. The clock signal is in a level switching mode during the blank area of ​​one frame of image time. The level switching mode represents the clock signal switching level state between the first level and the second level. Different pairs of clock signal lines correspond to different first moments.

[0240] In some embodiments, the first time points corresponding to different pairs of clock signal lines are different. For example, as shown in Figure 8, the time difference between any two pairs of the eight CLK signals is 1H.

[0241] The specific implementation of the display driving method in this embodiment can be referred to the relevant description of the timing driving method of the touch panel in the foregoing embodiment, and will not be repeated here.

[0242] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0243] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0244] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0245] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0246] The above provides a detailed description of a touch panel, display device, and display driving method provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, those skilled in the art will recognize that there will be changes in the specific implementation methods and application scope based on the ideas of this application.

[0247] In conclusion, the content of this specification should not be construed as a limitation of this application.

Claims

1. A touch panel, wherein, The touch panel includes: a display panel, and a touch sensing layer disposed on the light-emitting side of the display panel. The display panel includes a gate driving circuit and multiple control signal lines. The control signal lines are electrically connected to the gate driving circuit and are also used to connect to the timing control circuit of the touch panel. The multiple control signal lines include a first control signal line and a second control signal line. The first control signal line is used to receive a first control signal sent by the timing control circuit at a first moment, and the second control signal line is used to receive a second control signal sent by the timing control circuit after a delay based on the first moment. The first control signal and the second control signal are gate drive control signals of the same type. The gate drive control signal includes a first signal edge and a second signal edge. The control signal line receives the first signal edge earlier than the second signal edge. Within one frame, each first signal edge of the second control signal is aligned with one second signal edge of the first control signal. The first signal edge represents a signal transition from a first level to a second level, and the second signal edge represents a signal transition from the second level to the first level.

2. The touch panel according to claim 1, wherein, The first control signal line and the second control signal line are frame start signal lines, respectively; Wherein, the first control signal and the second control signal are frame start signals, and the frame start signal includes a first signal edge and a second signal edge; The first signal edge of the second control signal received by the second control signal line is aligned with the second signal edge of the first control signal received by the first control signal line.

3. The touch panel according to claim 1, wherein, The first control signal line and the second control signal line are clock signal lines, respectively. Wherein, the first control signal and the second control signal are clock signals, and the clock signal is in a level switching mode during the blank area of ​​the frame time. The level switching mode represents the clock signal switching level state between the first level and the second level. Each first signal edge of the clock signal received by the second control signal line is aligned with a second signal edge of the clock signal received by the first control signal line.

4. The touch panel according to claim 1, wherein, The display panel includes a display area and a non-display area located outside the display area; the non-display area includes a first border area and a second border area disposed on the opposite side of the display area; The gate driving circuit includes a first driving circuit and a second driving circuit; the first driving circuit is disposed in the first frame area, and the second driving circuit is disposed in the second frame area; the first driving circuit and the second driving circuit respectively include gate driving units cascaded together. The plurality of control signal lines include a pair of first control signal lines and second control signal lines; the first driving circuit is electrically connected to at least one pair of the first control signal lines and the second control signal lines, and the second driving circuit is electrically connected to at least one pair of the first control signal lines and the second control signal lines.

5. The touch panel according to claim 4, wherein, The multiple control signal lines include two pairs of first control signal lines and second control signal lines, wherein the first control signal lines and the second control signal lines are frame start signal lines; The first pair of frame start signal lines are disposed in the first border area; in the first pair of frame start signal lines, the first control signal line is electrically connected to at least one gate driving unit in the first driving circuit, and the second control signal line is electrically connected to at least one gate driving unit in the first driving circuit; wherein, in the first pair of frame start signal lines, the first control signal line receives the first control signal sent by the timing control circuit at a first sub-time. The second pair of frame start signal lines is disposed in the second border area; in the second pair of frame start signal lines, the first control signal line is electrically connected to at least one gate driving unit in the second driving circuit, and the second control signal line is electrically connected to at least one gate driving unit in the second driving circuit; wherein, in the second pair of frame start signal lines, the first control signal line receives the first control signal sent by the timing control circuit at a second sub-time; the first time includes the first sub-time and the second sub-time; the time difference between the first sub-time and the second sub-time is one line scan duration.

6. The touch panel according to claim 4, wherein, The cascaded gate driving units include: a first redundant unit, a second redundant unit, and N cascaded gate driving units; where N is a positive integer; The first redundant unit is cascaded with the first-stage gate driving unit among the N gate driving units, and the second redundant unit is cascaded with the second-stage gate driving unit among the N gate driving units; The first control signal line and the second control signal line are frame start signal lines, the first control signal line is electrically connected to the first redundancy unit, and the second control signal line is electrically connected to the second redundancy unit; The display panel also includes multiple clock signal lines, which are used to connect to the timing control circuit and receive clock signals sent by the timing control circuit. The plurality of clock signal lines include a first clock signal line and a second clock signal line. The first clock signal line is electrically connected to the gate driving unit of the first stage, and the second clock signal line is electrically connected to the gate driving unit of the second stage. The first clock signal line receives the clock signal sent by the timing control circuit at a second time, the time difference between the second time and the first time being four row scan durations; the second clock signal line receives the clock signal sent by the timing control circuit at a third time, the time difference between the third time and the second time being two row scan durations.

7. The touch panel according to any one of claims 1-6, wherein, The display panel includes a first display substrate and a second display substrate; the gate driving circuit and the plurality of control signal lines are disposed in the first display substrate, and the touch sensing layer is disposed on the side of the second display substrate opposite to the first display substrate; The display panel further includes: a light-shielding layer disposed on the side of the second display substrate near the first display substrate; the light-shielding layer includes a first groove; The orthographic projection of the first groove on the first surface is a first orthographic projection, the orthographic projection of the control signal line on the first surface is a second orthographic projection, and the orthographic projection of the touch sensing layer on the first surface is a third orthographic projection; the first surface is the surface of the second display substrate close to the first display substrate. There is no overlap between the second orthographic projection and the third orthographic projection; the first orthographic projection is located between the second orthographic projection and the third orthographic projection, so that the first groove disconnects the coupling capacitance between the control signal line and the touch sensing layer.

8. The touch panel according to claim 7, wherein, The multiple control signal lines include a frame start signal line; the touch sensing layer includes a first electrode; The orthographic projection of the first electrode onto the first surface is a first sub-projection, and the third orthographic projection includes the first sub-projection; The second orthographic projection corresponding to the frame start signal line does not overlap with the first sub-projection; the first orthographic projection is located between the first sub-projection and the second orthographic projection corresponding to the frame start signal line, so that the first groove disconnects the coupling capacitance between the frame start signal line and the first electrode.

9. The touch panel according to claim 7, wherein, The multiple control signal lines include clock signal lines; the touch sensing layer includes a second electrode; The orthographic projection of the second electrode onto the first surface is a second sub-projection, and the second orthographic projection includes the second sub-projection; The first orthographic projection and the second sub-projection corresponding to the clock signal line do not overlap; The first orthographic projection is located between the second sub-projection and the second orthographic projection corresponding to the clock signal line, so that the first groove disconnects the coupling capacitance between the clock signal line and the second electrode.

10. The touch panel according to claim 7, wherein, The first orthographic projection overlaps with at most one of the second orthographic projection and the third orthographic projection.

11. The touch panel according to claim 7, wherein, The shape of the first orthographic projection is rectangular; the length of the first edge of the first orthographic projection is a first length; The light-shielding layer has an overlapping area when projected onto the first surface and the second surface, and the length of the second edge of the overlapping area is a second length. The first length is not less than the second length.

12. The touch panel according to claim 7, wherein, The first display substrate includes a display area and a non-display area located outside the display area; the non-display area includes a first border area and a second border area disposed on the opposite side of the display area; The control signal line is disposed in the first frame area, and the light-shielding layer includes at least one of the first grooves on the side near the first frame area. And / or, The control signal line is disposed in the second frame area, and the light-shielding layer includes at least one of the first grooves on the side near the second frame area.

13. The touch panel according to claim 12, wherein, The light-shielding layer includes two first grooves on the side near the first frame area, and there is no overlap between the first orthographic projections corresponding to the two first grooves. And / or, The light-shielding layer includes two first grooves on the side near the second frame area, and there is no overlap between the first orthographic projections corresponding to the two first grooves.

14. The touch panel according to claim 12, wherein, The non-display area also includes a third border area and a fourth border area disposed on the opposite side of the display area; the third border area is adjacent to the first border area and the second border area respectively; The light-shielding layer includes at least one second groove on the side near the third frame area, and the light-shielding layer includes at least one second groove on the side near the fourth frame area; The second groove in the third border area is connected to a first groove in the first border area and a first groove in the second border area, respectively. The second groove in the fourth border area is connected to a first groove in the first border area and a first groove in the second border area, respectively. The first groove and the second groove, which are interconnected, form an annular groove.

15. The touch panel according to claim 14, wherein, The orthographic projection of the second groove on the first surface is the fourth orthographic projection, and the fourth orthographic projection does not overlap with the third orthographic projection.

16. The touch panel according to claim 14, wherein, The annular groove, when projected onto the first surface, has a rectangular shape.

17. A display device, wherein, The display device includes a touch panel as described in any one of claims 1-16.

18. A display driving method, wherein, The display driving method is used to drive a touch panel as described in any one of claims 1-16, and includes: A first control signal is sent to a first control signal line at a first moment, and a second control signal is sent to a second control signal line after a delay based on the first moment, such that each first signal edge of the second control signal is aligned with a second signal edge of the first control signal within one frame time. The gate drive control signal includes a first signal edge and a second signal edge. The control signal line receives the first signal edge earlier than it receives the second signal edge. The first control signal and the second control signal are gate drive control signals of the same type. The first signal edge represents a signal transition from a first level to a second level, and the second signal edge represents a signal transition from the second level to the first level.

19. The display driving method according to claim 18, wherein, The step of sending a first control signal to a first control signal line at a first moment, and sending a second control signal to a second control signal line with a delay based on the first moment, includes: A first control signal is sent to the first control signal line at the first moment, and a second control signal is sent to the second control signal line after a delay based on the first moment, so that the first signal edge of the second control signal is aligned with the second signal edge of the first control signal; Wherein, the first control signal and the second control signal are frame start signals, and the frame start signal includes a first signal edge and a second signal edge; the first time corresponding to different pairs of frame start signal lines is different.

20. The display driving method according to claim 18, wherein, The step of sending a first control signal to a first control signal line at a first moment, and sending a second control signal to a second control signal line with a delay based on the first moment, includes: A first control signal is sent to the first control signal line at the first moment, and a second control signal is sent to the second control signal line after a delay based on the first moment, such that each first signal edge of the second control signal is aligned with a second signal edge of the first control signal. Wherein, the first control signal and the second control signal are clock signals, and the clock signal is in a level switching mode during the blank area of ​​the frame time. The level switching mode represents the clock signal switching level state between the first level and the second level; the first time corresponding to different pairs of clock signal lines is different.

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