Touch control assembly, touch control method, touch control substrate and display equipment

Abstract

The invention provides a touch component, a touch method, a touch substrate and display equipment. The touch component comprises a sensing layer and a driving layer which are connected with each other, the sensing layer is configured to receive the scanning signal sent by the driving layer, perform scanning and send a limb touch control signal to the driving layer in response to determining that limb touch control is scanned; and the driving layer is configured to send the scanning signal to the sensing layer, determine a limb touch area in the sensing layer in response to the received limb touch signal, and close an active pen connection signal sent to the limb touch area.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of touch control driving, and in particular, to a touch control component, a touch control method, a touch control substrate, and a display device. Background Art

[0002] When using a touch screen, when a hand uses an active pen to write on the touch screen, if the active pen and the hand touch the screen at the same time, the active pen cannot establish an effective connection with the touch screen, thereby making it impossible to write on the screen. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a touch control component, a touch control method, a touch control substrate and a display device.

[0004] Based on the above objectives, the present application provides a touch control assembly, including: a sensing layer and a driving layer connected to each other;

[0005] The sensing layer is configured to receive a scanning signal sent by the driving layer and perform scanning, and in response to determining that a body touch is scanned, send a body touch signal to the driving layer;

[0006] The driving layer is configured to send the scanning signal to the sensing layer, determine the limb touch area in the sensing layer in response to receiving the limb touch signal, and turn off the active pen connection signal sent to the limb touch area.

[0007] Preferably, the sensing layer comprises a plurality of sensing units;

[0008] Each sensing unit is connected to the driving layer and is configured to send a limb touch signal to the driving layer in response to determining that limb touch is scanned during the scanning phase, and not output the active pen connection signal in response to determining that the active pen connection signal is not received during the active connection phase.

[0009] Preferably, the driving layer includes:

[0010] The touch drive unit is connected to each sensing unit and each pixel drive unit, and is configured to generate an active pen connection number, receive a limb touch signal sent by each sensing unit, and in response to determining that the number of sensing units sending limb touch signals is greater than or equal to a preset number threshold, form the sensing units sending limb touch signals into the limb touch area, and during the active connection stage, turn off the active pen connection signal sent to each sensing unit in the limb touch area.

[0011] Preferably, the driving layer further comprises a plurality of pixel driving units, each pixel driving unit being connected to a corresponding sensing unit;

[0012] The touch control driving unit is further configured to, in the active connection stage, in response to determining to turn off the active pen connection signal sent to the limb touch control area, convert the active pen signal sent to the corresponding pixel driving unit into a low level signal;

[0013] Each pixel driving unit is configured to, in the active connection stage, in response to determining that the touch driving unit turns off the active pen connection signal sent to the corresponding sensing unit, connect the low-level signal from the touch driving unit to keep no leakage when lighting the pixel.

[0014] Preferably, each pixel driving unit comprises a transistor, a bootstrap capacitor and a common electrode;

[0015] The common electrode is connected to the bootstrap capacitor, the corresponding sensing layer and the touch driving unit, and is configured to receive an active pen connection signal sent to the corresponding sensing unit, and in the active connection stage, in response to determining that the active pen connection signal sent to the corresponding sensing unit is turned off, maintain a low potential voltage of the active pen connection signal, and output the low potential voltage to the bootstrap capacitor;

[0016] The first end of the bootstrap capacitor is connected to the common electrode, and the second end is connected to the drain of the transistor, and is configured to bootstrap the low potential voltage connected to the first end to the transistor through the second end during the active connection stage;

[0017] The gate of the transistor is connected to the touch drive unit, and the drain is connected to the second end of the bootstrap capacitor. The transistor is configured such that the gate receives the active pen connection signal from the touch drive unit. During the active connection stage, in response to determining that the active pen connection signal sent to the corresponding sensing unit is turned off, the gate receives the low level signal, and the drain maintains the low potential voltage to maintain the source-drain voltage unchanged.

[0018] Optionally, the touch drive unit is further connected to an anti-phase signal having a phase opposite to that of the active pen signal;

[0019] The touch control driving unit is further configured to, in the active connection stage, send an inverted signal to the common electrode of the sensing unit and the corresponding pixel driving unit in the limb touch control area in response to determining to turn off the active pen connection signal sent to the limb touch control area;

[0020] The sensing unit is further configured to receive and output the inverted signal from the touch driving unit during the active connection phase.

[0021] Optionally, the common electrode is further configured to, in the active connection stage, receive the inverted signal sent by the touch drive unit, and output the inverted signal to the bootstrap capacitor;

[0022] The bootstrap capacitor is further configured to, during the active connection phase, bootstrap the inverted signal connected to the first terminal to the transistor via the second terminal;

[0023] The transistor is further configured to, during the active connection phase, connect the inverted signal from the second section of the bootstrap capacitor and connect the low-level signal to the gate to maintain the source-drain voltage unchanged.

[0024] Preferably, each pixel driving unit further comprises a pixel;

[0025] The pixel is connected to the drain electrode of the transistor and is configured to remain stably lit in response to determining that the source-drain voltage remains unchanged during the active connection stage.

[0026] Preferably, the touch drive unit is further configured to, in response to determining that the number of sensing units sending limb touch signals is less than the number threshold, determine that the limb touch area disappears, and send the active pen connection signal to each sensing unit in the active connection stage.

[0027] Based on the same inventive concept, the present application also provides a touch control method for controlling a touch control component as described in any of the preceding items, wherein the touch control component includes a sensing layer and a driving layer;

[0028] The method includes:

[0029] The sensing layer receives the scanning signal sent by the driving layer and performs scanning, and in response to determining that a body touch is scanned, sends a body touch signal to the driving layer;

[0030] The driving layer sends the scanning signal to the sensing layer, determines the limb touch area in the sensing layer in response to receiving the limb touch signal, and turns off the active pen connection signal sent to the limb touch area.

[0031] Based on the same inventive concept, the present application also provides a driving substrate, which includes the touch control component as described in any of the above items.

[0032] Based on the same inventive concept, the present application also provides a display device, which includes the touch substrate as described above.

[0033] From the above, it can be seen that the touch component, touch method, touch substrate and display device provided by the present application are based on the sensing layer scanning the limb touch, and the driving layer determines the limb touch area according to the limb touch, and turns off the active pen connection signal sent to the corresponding sensing unit, so that the sensing unit where the limb touch occurs in the sensing layer will not receive the active pen connection signal, and thus will not output the active pen connection signal to the outside, so that the ground end of the active pen will not be coupled due to the active pen connection signal received by the hand, so that the active pen can establish a connection with the screen normally; at the same time, the touch driving unit in the driving layer will also replace the active pen connection signal sent to the corresponding pixel driving unit with a low-level signal, so that there will be no leakage in the active connection stage. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0035] Figure 1 A schematic diagram of writing on a touch screen according to an embodiment of the present application;

[0036] Figure 2 This is a first timing diagram of the touch timing of an embodiment of the present application;

[0037] Figure 3 This is a first structural diagram of a touch control assembly according to an embodiment of the present application;

[0038] Figure 4 A schematic diagram of a sensing layer according to an embodiment of the present application;

[0039] Figure 5 A second structural diagram of a touch control assembly according to an embodiment of the present application;

[0040] Figure 6 This is a connection diagram of VMD2GVL in an embodiment of the present application;

[0041] Figure 7 A circuit diagram of a pixel driving circuit according to an embodiment of the present application;

[0042] Figure 8 This is a second timing diagram of an embodiment of the present application;

[0043] Fig. 9 This is a third timing diagram of an embodiment of the present application;

[0044] Fig.10 This is the fourth timing diagram of the embodiment of the present application;

[0045] Fig.11 This is the fifth timing diagram of the embodiment of the present application;

[0046] Fig.12 This is the sixth timing diagram of the embodiment of the present application;

[0047] Fig.13 A flow chart of a touch control method according to an embodiment of the present application;

[0048] Fig.14 A first logic diagram of a touch control method according to an embodiment of the present application;

[0049] Fig.15 A second logic diagram of the touch control method according to an embodiment of the present application;

[0050] Fig.16 This is a first effect diagram of an embodiment of the present application;

[0051] Fig.17 This is a second effect diagram of an embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0053] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0054] As described in the background technology section, the related touch control components still cannot meet the needs of actual use.

[0055] In the process of implementing this application, the applicant discovered that the main problem with the relevant touch components is that when using the active pen to perform touch operations on the touch screen with the active pen in the hand holding the active pen, the hand will come into contact with the touch screen, resulting in the active pen being unable to establish an effective connection with the touch screen.

[0056] Specifically, the touch screen contains multiple Cells (sensing units), each of which sends the same Uplink signal (active pen connection signal for connecting to the active pen) to the active pen according to a preset timing. When the active pen is used to perform touch operations on the touch screen, the active pen receives the Uplink signal when it contacts the touch screen, or the active pen receives the Uplink signal within a certain height from the touch screen according to a predetermined touch protocol.

[0057] As Figure 1 In the posture of holding the active pen shown, when the active pen is used for touch operation, the palm will also touch the touch screen at the same time. At this time, the Uplink2 signal emitted by the sensing unit in the touch screen that touches the palm is transmitted to the palm. The Uplink2 signal is transmitted to the housing of the active pen through the capacitance of the screen to the palm and through the capacitance of the palm to the active pen.

[0058] Furthermore, the housing of the active pen can be regarded as the GND (ground terminal) of the active pen, and therefore, the GND of the active pen will change along with the high and low potentials of the Uplink2 signal.

[0059] At this time, the sensing unit in contact with the active pen sends out an Uplink1 signal, and the Uplink1 signal will be sent to the active pen through the screen's capacitance to the active pen. However, since the GND of the active pen changes with the Uplink2 signal, that is, the GND of the active pen will undergo the same high and low potential changes as the Uplink1 signal, which will cause the equivalent potential difference formed inside the active pen by the Uplink1 signal received by the active pen to become smaller, or even difficult to form an effective equivalent potential difference, thereby making it impossible for the active pen to feedback signals to the touch screen, and the connection between the active pen and the touch screen fails, making it impossible to perform touch operations such as writing on the touch screen normally.

[0060] Based on this, one or more embodiments of the present application provide a touch component, which controls the active pen connection signal emitted by the sensing layer and shuts down the active pen connection signal emitted by the area in contact with the limb, thereby ensuring that the active pen can establish an effective connection with the sensing layer.

[0061] In the embodiment of the present application, in order to establish communication with the active pen, each sensing unit in the touch screen is as follows: Figure 2 The touch timing shown is used to send relevant Sensor signals (touch signals) to the active pen.

[0062] Among them, the duration of the high potential of Vsync is used to represent the time of one frame, TEPN represents a square wave formed according to the touch timing, and each high potential interval of TPEN is a touch drive interval for performing touch-related actions, that is, an interval in which the Sensor drive signal exists. In this embodiment, the touch drive interval is called a Touch pit.

[0063] Furthermore, the low potential interval represents a display interval for display, that is, an interval without a sensor driving signal. In this embodiment, the touch screen may be, for example, an In Cell touch screen (a touch screen in which a touch function is embedded in pixels).

[0064] exist Figure 2 In the example of , the Sensor signal may include, for example, a scanning signal and an Uplink signal, such as Figure 2 As shown, from TPEN1 to TEPN20 is a frame, in which TPEN1, TPEN5, TPEN6, TPEN9, TPEN10, TPEN11, TPEN15, TPEN16 and TPEN19 are scanning Touch pits, that is, the scanning stage in the touch timing, in which it is scanned whether body touch occurs based on the scanning signal; TPEN20 is the active pen Uplink Touch pit, that is, the active connection stage in the touch timing, in which an Uplink signal is sent to the active pen; TPEN2, TPEN3, TPEN7, TPEN8, TPEN12, TPEN13, TPEN17 and TPEN18 are the active pen Downlink Touch pits, that is, the receiving stage in the touch timing, in which the feedback signal sent by the active pen is received; TPEN4 and TPEN14 are noise detection Touch pits, that is, the noise monitoring stage in the touch timing, in which the noise caused by touch is monitored.

[0065] Among them, the length of TEPN20 is 260us, the length of other Touch pits is 160us, the length of the display phase is 657us, and the total length of one frame is 16666.666us.

[0066] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0067] refer to Figure 3 , a touch control assembly 1 according to an embodiment of the present application comprises: a sensing layer 101 and a driving layer 102 connected to each other;

[0068] The sensing layer 101 is configured to receive a scanning signal sent by the driving layer 102 and perform scanning, and in response to determining that a body touch is scanned, send a body touch signal to the driving layer 102;

[0069] The driving layer 102 is configured to send the scanning signal to the sensing layer 101, determine the limb touch area in the sensing layer 101 in response to receiving the limb touch signal, and turn off the active pen connection signal sent to the limb touch area.

[0070] In this embodiment, if Figure 3 As shown, the touch screen includes a touch component 1, and the touch component 1 includes a sensing layer 101 and a driving layer 102 connected to each other.

[0071] The driving layer 102 generates the sensor signal according to the touch timing sequence as shown above, and sends it to the sensing layer 101, so that the sensing layer 101 executes the sensor signal according to the touch timing sequence.

[0072] Specifically, in the scanning phase, the driving layer 102 generates a scanning signal, and sends the generated scanning signal to the sensing layer 101 .

[0073] Furthermore, in the scanning stage, the sensing layer 101 receives a scanning signal from the driving layer 102, and scans for body touch based on the received scanning signal. When the sensing layer 101 scans that a body touch occurs, the body touch signal is sent to the driving layer 102, so that the driving layer 102 determines the location where the body touch occurs according to the body touch signal; when the sensing layer 101 does not scan that a body touch occurs, no body touch signal is sent to the driving layer 102.

[0074] Furthermore, in the active connection stage, the driving layer 102 generates an Uplink signal. When the driving layer 102 does not receive a limb touch signal from the sensing layer 101, the driving layer 102 normally sends an Uplink signal to the sensing layer 101; when the driving layer 102 receives a limb touch signal from the sensing layer 101, the limb touch area where limb touch occurs in the sensing layer 101 is determined according to the limb touch signal, and the Uplink signal sent to the limb touch area is turned off.

[0075] Furthermore, in the active connection stage, each area of ​​the sensing layer 101 controls whether to output an Uplink signal to the outside according to whether an Uplink signal is received from the driving layer 102 .

[0076] Specifically, the limb touch area that has not received the Uplink signal will not output the Uplink signal to the outside, so as to avoid other areas being unable to establish an effective connection with the active pen due to the Uplink signal output by this area; other areas that have received the Uplink signal will output the Uplink signal to the outside to establish a connection with the active pen.

[0077] Furthermore, in the active connection stage, the Uplink signal generated by the driving layer 102 is not only used to be sent to the sensing layer 101, but also used to light up the pixels.

[0078] Based on this, when the driving layer 102 turns off the Uplink signal sent to the limb touch area, the Uplink signal used to light up the pixel corresponding to the limb touch area is converted into a low-level signal, so that the driving layer 102 will not leak when lighting up the pixel, and the pixel voltage of the pixel in the display interval and the touch drive interval can remain stable and consistent.

[0079] In another embodiment of the present application, the sensing layer 101 includes a plurality of sensing units 1011 ;

[0080] Each sensing unit 1011 is connected to the driving layer 102 and is configured to, in response to determining that a physical touch is scanned during the scanning phase, send a physical touch signal to the driving layer 102, and in the active connection phase, in response to determining that the active pen connection signal is not received, not output the active pen connection signal.

[0081] In this embodiment, Figure 4 The structure of the sensing layer 101 is shown, which includes a plurality of cells (sensing units 1011 ).

[0082] Each Cell receives a scan signal and an Uplink signal from the driving layer 102 according to the touch control timing of the aforementioned embodiment, and performs body touch scanning and Uplink signal transmission according to the touch control timing.

[0083] Specifically, according to Figure 2 In the touch control timing shown, in the scanning phase, each Cell receives a scanning signal from the driving layer 102 and scans the body touch accordingly.

[0084] Furthermore, if Figure 4 As shown, when the hand contacts any Cell, the Cell will scan the position of the Cell and a physical touch occurs, and send a physical touch signal to the driving layer 102 .

[0085] Furthermore, in the active connection phase, each Cell attempts to receive an Uplink signal from the driver layer 102. When any Cell is able to receive an Uplink signal from the driver layer 102, it outputs the Uplink signal to the outside; when any Cell fails to receive an Uplink signal from the driver layer 102, it does not output an Uplink signal to the outside.

[0086] In another embodiment of the present application, the driving layer 102 includes:

[0087] The touch drive unit 1021 is connected to each sensing unit 1011 and each pixel drive unit 1022, and is configured to generate an active pen connection number, receive a limb touch signal sent by each sensing unit 1011, and in response to determining that the number of sensing units 1011 sending limb touch signals is greater than or equal to a preset number threshold, form the sensing units 1011 sending limb touch signals into the limb touch area, and during the active connection stage, turn off the active pen connection signal sent to each sensing unit 1011 in the limb touch area.

[0088] In this embodiment, if Figure 5 As shown, the driving layer 102 can be regarded as an integrated IC (integrated circuit). In addition to the touch driving unit 1021 for driving the touch function, a corresponding pixel driving unit 1022 is set for each Cell in the integrated IC, and the touch driving unit 1021 and the corresponding Cell are connected to the common electrode Pcom.

[0089] Based on this, in the scanning stage, the touch driving unit 1021 determines whether a physical touch signal is received. After receiving a physical touch signal sent by any Cell, it further determines the number of Cells that sent the physical touch signal.

[0090] Furthermore, when the number of cells sending limb touch signals is greater than or equal to a preset threshold, it can be considered that the limb is in stable contact with the sensing layer 101, and the limb touch area is determined according to the cells sending the limb touch signals.

[0091] The number threshold may be, for example, 17. When the number of cells sending limb touch signals is greater than or equal to 17, it is considered that the limb touches the sensing layer 101. Figure 1 Stable contact shown.

[0092] Furthermore, the Cell that sends the body touch signal can be determined as the body touch area. It can be seen that in this case, the body touch area can be, for example Figure 4 The irregular limb touch area shown is the palm area.

[0093] Furthermore, when the number of cells sending limb touch signals is less than 17, it is considered that the limb has not touched the sensing layer 101. Figure 1 The stable contact shown in the figure is not a stable contact, but an action such as writing on the touch screen with a finger, or an accidental touch of a limb on the touch screen.

[0094] In some other embodiments, for the convenience of calculation, a regular body touch area including the Cell that sends the body touch signal may also be determined, that is, Figure 4The square area shown contains the palm area.

[0095] In another embodiment of the present application, after the touch driving unit 1021 receives a physical touch signal from any Cell, before determining the number of Cells sending the physical touch signal, it can further determine whether the same physical touch signal sent by the same Cell appears for multiple consecutive frames.

[0096] In a specific example, each Cell is scanned in the scanning stage of each frame. When physical touch is scanned in the scanning stages of multiple consecutive frames, for example, physical touch is scanned in the scanning stages of three consecutive frames, it is considered that physical touch has occurred; if physical touch is not scanned in the scanning stages of multiple consecutive frames, it is considered that no physical touch has occurred at the Cell position; if the physical touch scanned by the Cell fails to continue for multiple frames, it is considered that the physical touch occurring at the Cell position is a false touch.

[0097] Based on this, the cells that send body touch signals for multiple consecutive frames are determined, and the number of cells is judged, and the body touch area is determined according to the number.

[0098] In another embodiment of the present application, the driving layer 102 further includes a plurality of pixel driving units 1022 , and each pixel driving unit 1022 is correspondingly connected to one sensing unit 1011 ;

[0099] The touch driving unit 1021 is further configured to, in the active connection stage, in response to determining to turn off the active pen connection signal sent to the limb touch area, convert the active pen signal sent to the corresponding pixel driving unit 1022 into a low level signal;

[0100] Each pixel driving unit 1022 is configured to, in the active connection stage, in response to determining that the touch driving unit 1021 turns off the active pen connection signal sent to the corresponding sensing unit 1011, connect the low-level signal from the touch driving unit 1021 to maintain no leakage when lighting the pixel.

[0101] In this embodiment, in each frame, the touch driving unit 1021 turns off the Uplink signal sent to each Cell in the limb touch area based on the limb touch area determined in the scanning stage when entering the active connection stage. At the same time, the touch driving unit 1021 converts the Uplink signal input to the pixel driving unit 1022 corresponding to each Cell in the limb touch area into a low-level signal.

[0102] Specifically, Figure 5 As shown, when Figure 5If the sensing unit 1011 of the middle sensing layer 101 is not a sensing unit 1011 in the limb touch area, then in the active connection stage, the touch driving unit 1021 will send an Uplink signal to the sensing unit 1011 through the common electrode Pcom.

[0103] Furthermore, in the active connection phase, Figure 5 The pixel driving unit 1022 corresponding to the sensing unit 1011 also receives the Uplink signal through the common electrode Pcom. Meanwhile, the touch driving unit 1021 also sends a VMD2GVL signal which is the same as the Uplink signal to the pixel driving unit 1022 .

[0104] The VMD2VGL signal output by the driving layer 102 is connected to the pixel driving unit 1022 via a first capacitor C1; Figure 6 As shown, by adding a VMD2VGL pin in the pixel driving unit 1022, the original VMD signal is replaced by the connected VMD2VGL signal. The VMD signal is a Sensor signal generated according to the touch timing. That is to say, the connected VMD signal can be regarded as generating an Uplink signal in the active connection stage; and the VMD2VGL signal is in the active connection stage. When the touch driving unit 1021 normally sends an Uplink signal to the sensing unit 1011, that is, when the sensing unit 1011 does not belong to the body touch area, the VMD2GVL signal sent to the corresponding pixel driving unit 1022 is an Uplink signal, and the Uplink signal is used to light up the pixel.

[0105] Furthermore, when Figure 5 When the sensing unit 1011 of the middle sensing layer 101 is the sensing unit 1011 in the body touch area, in the active connection stage, the touch driving unit 1021 turns off the Uplink signal originally sent to the sensing unit 1011 through the common electrode Pcom.

[0106] Based on this, in the active connection stage, when the touch driving unit 1021 turns off the Uplink signal output to the common electrode Pcom, the pixel driving unit 1022 corresponding to the sensing unit 1011 cannot access the original Uplink signal through the common electrode Pcom, and the common electrode Pcom maintains a low potential voltage in the Uplink.

[0107] At the same time, the touch driving unit 1021 also sends a VMD2GVL signal which is the same as the low level signal to the pixel driving unit 1022 .

[0108] Among them, in the active connection stage, when the touch driving unit 1021 closes sending the Uplink signal to the sensing unit 1011, that is, when the sensing unit 1011 belongs to the limb touch area, the VMD2GVL signal sent to the corresponding pixel driving unit 1022 will be converted into a low-level signal. The low-level signal can be, for example, a signal that always maintains a low potential voltage of 5V.

[0109] Based on this, in the active connection stage, regardless of whether the limb touch area is determined and whether the touch driving unit 1021 turns off the Uplink signal output to the sensing unit 1011, the pixel driving unit 1022 can keep the voltage difference between the common electrode Pcom and the VMD2VGL signal consistent, so that the pixel driving unit 1022 does not leak electricity and the pixel can remain stably lit.

[0110] In the embodiment of the present application, each pixel driving unit 1022 includes a transistor, a pixel, a bootstrap capacitor C2 and a common electrode Pcom;

[0111] The common electrode Pcom is connected to the bootstrap capacitor C2, the corresponding sensing layer 101 and the touch driving unit 1021, and is configured to receive the active pen connection signal sent to the corresponding sensing unit 1011. In the active connection stage, in response to determining that the active pen connection signal sent to the corresponding sensing unit 1011 is turned off, the low potential voltage of the active pen connection signal is maintained, and the low potential voltage is output to the bootstrap capacitor C2;

[0112] The first end of the bootstrap capacitor C2 is connected to the common electrode Pcom, and the second end is connected to the drain of the transistor, and is configured to bootstrap the low potential voltage connected to the first end to the transistor through the second end during the active connection stage;

[0113] The gate of the transistor is connected to the touch driving unit 1021, and the drain is connected to the second end of the bootstrap capacitor C2, and is configured such that the gate receives the active pen connection signal from the touch driving unit 1021, and in the active connection stage, in response to determining that the active pen connection signal sent to the corresponding sensing unit 1011 is turned off, the gate receives the low level signal, and the drain maintains the low potential voltage to maintain the source-drain voltage unchanged;

[0114] The pixel is connected to the drain electrode and is configured to remain stably lit in response to determining that the source-drain voltage remains unchanged during the active connection stage.

[0115] In this embodiment, if Figure 7As shown, each pixel driving unit 1022 includes a TFT (transistor), a bootstrap capacitor C2, a pixel, a common electrode Pcom, a second capacitor C2 and a resistor R.

[0116] The first end of C2 is connected to the common electrode Pcom, and the second end of C2 is connected to the drain of the TFT. Therefore, the drain of the TFT is connected to the voltage signal of the common electrode Pcom through C2.

[0117] Furthermore, the drain of the TFT and the second end of C2 are commonly connected to the pixel.

[0118] Furthermore, the common electrode Pcom is also connected to the corresponding sensing layer 101 and to the touch driving unit 1021 .

[0119] In this embodiment, if Figure 8 As shown, the source, gate and common electrode Pcom of the TFT are connected to a square wave formed according to the touch timing, wherein the gate is connected to the VMD signal, so that the low potential of the gate voltage Vg of the TFT is -11V and the high potential is -6V; the low potential of the common voltage Vcom of the common electrode Pcom is 5V and the high potential is 10V.

[0120] Furthermore, the square wave of the common voltage Vcom can be bootstrapped to the drain of the TFT through the bootstrap capacitor C2, as shown in FIG. Figure 8 As shown, the drain voltage Vd of the TFT also forms a square wave same as Vcom, that is, the low potential of the drain voltage Vd is 5V and the high potential is 10V.

[0121] Based on this, Figure 8 In a specific example, when any sensing unit 1011 is not in contact with the body, the touch driving unit 1021 does not turn off the Uplink signal sent to the common electrode Pcom of the corresponding pixel driving unit 1022. In the display interval, the source-drain voltage Vgd of the TFT is the difference between the low potential of the gate voltage Vg and the low potential of the drain voltage Vd, that is, Vgd=Vg-Vd=-11V-5V=-16V.

[0122] Furthermore, in the touch driving interval, since the sensing unit 1011 does not come into contact with the limb and does not belong to the limb touch area, the touch driving unit 1021 has not yet turned off the Uplink signal sent to the common electrode Pcom of the corresponding pixel driving unit 1022. The source-drain voltage Vgd of the TFT is the difference between the high potential of the gate voltage Vg and the high potential of the drain voltage Vd, that is, Vgd=Vg-Vd=-6V-10V=-16V.

[0123] It can be seen that when any sensing unit 1011 is not in contact with the limbs, the source-drain voltage Vgd of the TFT remains consistent in the display interval and the touch drive interval, so that the TFT does not leak electricity, and then the voltage Vpixel of the pixel connected to the drain is also consistent in the display interval and the touch drive interval, so that the pixel can be stably lit in both the display interval and the touch drive interval.

[0124] Furthermore, when the palm is Figure 4 When it is placed on the touch screen and it is determined that the sensing unit 1011 belongs to the limb touch area, in the display interval, the touch driving unit 1021 does not turn off the Uplink signal sent to the common electrode Pcom of the corresponding pixel driving unit 1022. The source-drain voltage Vgd of the TFT is the difference between the low potential of the gate voltage Vg and the low potential of the drain voltage Vd, that is, Vgd=Vg-Vd=-11V-5V=-16V.

[0125] Furthermore, when entering the active connection stage of the touch driving interval, since the sensing unit 1011 belongs to the limb touch area, the touch driving unit 1021 turns off the Uplink signal sent to the sensing unit 1011, and the corresponding pixel driving unit 1022 cannot receive the Uplink signal from the common electrode Pcom, so the common voltage Vcom of the common electrode Pcom is maintained at the low potential of the Uplink signal, that is, 5V. Therefore, the gate voltage Vd of the TFT is also maintained at 5V through the bootstrap capacitor C2, and the following is formed: Fig. 9 The signal waveform is shown.

[0126] At this time, the source-drain voltage Vgd of the TFT is the difference between the high potential of the gate voltage Vg and the drain voltage Vd, that is, Vgd=Vg-Vd=-6V-5V=-11V.

[0127] It can be seen that when the sensing unit 1011 is in contact with the limb, the source-drain voltage Vgd of the TFT cannot remain consistent in the display interval and the touch drive interval. The change of the source-drain voltage Vgd, especially when entering the active connection stage from the display interval, Vgd becomes larger, causing the TFT to leak, and then the voltage Vpixel of the pixel connected to the drain also changes when entering the active connection stage from the display interval, making the pixel unable to light up stably after entering the active connection stage from the display interval, resulting in abnormal display after entering the active connection stage.

[0128] Based on this, the VMD signal connected to the gate of the TFT is replaced with a VMD2VGL signal. The VMD2VGL signal can generate a VMD signal when the touch driving unit 1021 does not close the Uplink sent to the sensing unit 1011, and generate a VGL signal (low level signal) when the touch driving unit 1021 closes the Uplink sent to the sensing unit 1011. The VGL signal is a signal to maintain a low potential voltage of the VMD signal.

[0129] Based on this, when entering the active connection stage of the touch driving interval, when the sensing unit 1011 belongs to the limb touch area and the touch driving unit 1021 turns off the Uplink sent to the sensing unit 1011, the corresponding pixel driving unit 1022 cannot receive the Uplink signal from the common electrode Pcom, and the common voltage Vcom of the common electrode Pcom is maintained at the low potential of the Uplink signal, that is, 5V. Therefore, the gate voltage Vd of the TFT obtains the voltage through the bootstrap capacitor C2 and also maintains at 5V. The gate voltage Vg converts the VMD signal to VGL and maintains at -11V, forming the following Fig.10 The signal waveform is shown.

[0130] At this time, the source-drain voltage Vgd of the TFT is the difference between the gate voltage Vg and the drain voltage Vd, that is, Vgd=Vg-Vd=-11V-5V=-16V.

[0131] It can be seen that when the sensing unit 1011 is in contact with the limb, the source-drain voltage Vgd of the TFT can still remain consistent in the display interval and the touch drive interval, so that the TFT will not leak electricity, and then the voltage Vpixel of the pixel connected to the drain is also consistent in the display interval and the touch drive interval, so that the pixel can be stably lit in both the display interval and the touch drive interval.

[0132] In another embodiment of the present application, the touch driving unit 1021 is further connected to an anti-phase signal having a phase opposite to that of the active pen signal;

[0133] The touch driving unit 1021 is further configured to, in the active connection stage, send an inverted signal to the common electrode Pcom of the sensing unit 1011 and the corresponding pixel driving unit 1022 in the limb touch control area in response to determining to turn off the active pen connection signal sent to the limb touch control area;

[0134] The sensing unit 1011 is further configured to receive and output the inverted signal from the touch driving unit 1021 during the active connection phase.

[0135] In this embodiment, in each frame, after the touch driving unit 1021 determines the limb touch area, when entering the active connection stage, it turns off the Uplink signal sent to each Cell in the limb touch area, and connects the anti-phase signal with the opposite phase to the Uplink signal. At the same time, the touch driving unit 1021 converts the Uplink signal input to the pixel driving unit 1022 corresponding to each Cell in the limb touch area into a low-level signal.

[0136] Specifically, Figure 5 As shown, when Figure 5 If the sensing unit 1011 of the middle sensing layer 101 is not a sensing unit 1011 in the limb touch area, then in the active connection stage, the touch driving unit 1021 will send an Uplink signal to the sensing unit 1011 through the common electrode Pcom.

[0137] Furthermore, in the active connection phase, Figure 5 The pixel driving unit 1022 corresponding to the sensing unit 1011 also receives the Uplink signal through the common electrode Pcom. Meanwhile, the touch driving unit 1021 also sends a VMD2GVL signal which is the same as the Uplink signal to the pixel driving unit 1022 .

[0138] Furthermore, when Figure 5 When the sensing unit 1011 of the middle sensing layer 101 is the sensing unit 1011 in the limb touch area, in the active connection stage, the touch driving unit 1021 turns off the Uplink signal originally sent to the sensing unit 1011 through the common electrode Pcom, and outputs the connected inverted signal to the common electrode Pcom.

[0139] Based on this, in the active connection stage, when the touch driving unit 1021 outputs the inverted signal to the Uplink signal at the common electrode Pcom, the pixel driving unit 1022 corresponding to the sensing unit 1011 also receives the inverted signal through the common electrode Pcom.

[0140] At the same time, the touch driving unit 1021 also sends a VMD2GVL signal which is the same as the low level signal to the pixel driving unit 1022 .

[0141] Based on this, when entering the active connection stage from the display interval, if the limb touch area is determined, the touch driving unit 1021 outputs an inverted signal to the corresponding pixel driving unit 1022, and the pixel driving unit 1022 can keep the voltage difference between the common electrode Pcom and the VMD2VGL signal consistent in the display interval and the active connection stage, so that the pixel driving unit 1022 does not leak electricity and the pixel can remain stably lit.

[0142] In another embodiment of the present application, the common electrode Pcom is further configured to receive the inverted signal sent by the touch driving unit 1021 during the active connection phase, and output the inverted signal to the bootstrap capacitor C2;

[0143] The bootstrap capacitor C2 is further configured to bootstrap the inverted signal connected to the first terminal to the transistor via the second terminal during the active connection phase;

[0144] The transistor is further configured to, during the active connection phase, connect the inverted signal from the second section of the bootstrap capacitor C2 and connect the low-level signal to the gate to maintain the source-drain voltage unchanged.

[0145] exist Figure 7 In the specific example, when entering the active connection stage of the touch driving interval, since the sensing unit 1011 belongs to the limb touch area, the touch driving unit 1021 turns off the Uplink signal sent to the sensing unit 1011 and replaces the Uplink signal with an inverted signal, and the corresponding pixel driving unit 1022 also receives the inverted signal from the common electrode Pcom, and outputs the inverted signal to the bootstrap capacitor C2.

[0146] Furthermore, the first end of the bootstrap capacitor C2 receives the inverted signal from the common electrode Pcom, and while maintaining the inverted signal, the inverted signal is output to the TFT through the second end. Therefore, the gate voltage Vd of the TFT obtained by the bootstrap capacitor C2 also receives the inverted signal, and forms the following: Fig.11 The signal waveform is shown.

[0147] At this time, the source-drain voltage Vgd of the TFT is the difference between the high potential of the gate voltage Vg and the low potential of the drain voltage Vd, that is, Vgd=Vg-Vd=-6V-5V=-11V.

[0148] It can be seen that when the sensing unit 1011 is in contact with the limb, the source-drain voltage Vgd of the TFT cannot remain consistent in the display interval and the touch drive interval. The change of the source-drain voltage Vgd, especially when entering the active connection stage from the display interval, Vgd becomes larger, causing the TFT to leak, and then the voltage Vpixel of the pixel connected to the drain also changes when entering the active connection stage from the display interval, making it impossible for the pixel to light up stably after entering the active connection stage from the display interval, resulting in abnormal display after entering the active connection stage.

[0149] Based on this, the VMD signal connected to the gate of the TFT is replaced with a VMD2VGL signal. The VMD2VGL signal can generate a VMD signal when the touch driving unit 1021 sends an Uplink to the sensing unit 1011, and generate a VGL signal (low level signal) when the touch driving unit 1021 sends an inverted signal to the sensing unit 1011. The VGL signal is a signal to maintain a low potential voltage of the VMD signal.

[0150] Based on this, when entering the active connection stage of the touch driving interval, when the sensing unit 1011 belongs to the limb touch area, when the touch driving unit 1021 sends an inverted signal to the sensing unit 1011, the corresponding pixel driving unit 1022 receives the inverted signal from the common electrode Pcom. Therefore, the gate voltage Vd of the TFT obtains the inverted signal through the bootstrap capacitor C2, and the gate voltage Vg converts the VMD signal to VGL and maintains it at -11V, forming a voltage as shown in FIG. Fig.12 The signal waveform is shown.

[0151] At this time, the source-drain voltage Vgd of the TFT is the low-level voltage difference between the gate voltage Vg and the drain voltage Vd, that is, Vgd=Vg-Vd=-11V-5V=-16V.

[0152] It can be seen that when the sensing unit 1011 is in contact with the limb, the source-drain voltage Vgd of the TFT can still remain consistent in the display interval and the touch drive interval, so that the TFT will not leak electricity, and then the voltage Vpixel of the pixel connected to the drain is also consistent in the display interval and the touch drive interval, so that the pixel can be stably lit in both the display interval and the touch drive interval.

[0153] For the convenience of description, the above devices are described in terms of functions and are divided into various modules. Of course, when implementing the embodiments of the present application, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0154] Based on the same inventive concept, corresponding to the circuit of any of the above embodiments, an embodiment of the present application further provides a touch control method.

[0155] refer to Fig.13 A touch control method according to an embodiment of the present application is applied to the touch control self-construction of any of the above embodiments, and specifically includes the following steps:

[0156] Step S1301 : The sensing layer 101 receives a scanning signal sent by the driving layer 102 and performs scanning. In response to determining that a body touch is scanned, the sensing layer 101 sends a body touch signal to the driving layer 102 .

[0157] In this embodiment, in the scanning stage, the driving layer 102 generates a scanning signal and sends the generated scanning signal to the sensing layer 101 .

[0158] Furthermore, in the scanning stage, the sensing layer 101 receives a scanning signal from the driving layer 102, and scans for body touch based on the received scanning signal. When the sensing layer 101 scans that a body touch occurs, the body touch signal is sent to the driving layer 102, so that the driving layer 102 determines the location where the body touch occurs according to the body touch signal; when the sensing layer 101 does not scan that a body touch occurs, no body touch signal is sent to the driving layer 102.

[0159] Furthermore, in the active connection stage, each area of ​​the sensing layer 101 controls whether to output an Uplink signal to the outside according to whether an Uplink signal is received from the driving layer 102 .

[0160] Specifically, the limb touch area that has not received the Uplink signal will not output the Uplink signal to the outside, so as to avoid other areas being unable to establish an effective connection with the active pen due to the Uplink signal output by this area; other areas that have received the Uplink signal will output the Uplink signal to the outside to establish a connection with the active pen.

[0161] Step S1302 , the driving layer 102 sends the scanning signal to the sensing layer 101 , determines the limb touch area in the sensing layer 101 in response to receiving the limb touch signal, and turns off the active pen connection signal sent to the limb touch area.

[0162] In this embodiment, in the active connection stage, the driving layer 102 generates an Uplink signal. When the driving layer 102 does not receive a limb touch signal from the sensing layer 101, the driving layer 102 normally sends an Uplink signal to the sensing layer 101; when the driving layer 102 receives a limb touch signal from the sensing layer 101, the limb touch area where limb touch occurs in the sensing layer 101 is determined according to the limb touch signal, and the Uplink signal sent to the limb touch area is turned off.

[0163] Furthermore, in the active connection stage, the Uplink signal generated by the driving layer 102 is not only used to be sent to the sensing layer 101, but also used to light up the pixels.

[0164] Based on this, when the driving layer 102 turns off the Uplink signal sent to the limb touch area, the Uplink signal used to light up the pixel corresponding to the limb touch area is converted into a low-level signal, so that the driving layer 102 will not leak when lighting up the pixel, and the pixel voltage of the pixel in the display interval and the touch drive interval can remain stable and consistent.

[0165] In another embodiment of the present application, the sensing layer 101 includes a plurality of cells (sensing units 1011 ); the driving layer 102 is provided with a touch driving unit 1021 and a plurality of pixel driving units 1022 .

[0166] In this embodiment, each Cell receives the scanning signal and the Uplink signal from the driving layer 102 according to the touch control timing of the aforementioned embodiment, and performs body touch scanning and Uplink signal transmission according to the touch control timing.

[0167] Specifically, according to Figure 2 In the touch control timing shown, in the scanning phase, each Cell receives a scanning signal from the driving layer 102 and scans the body touch accordingly.

[0168] Furthermore, if Figure 4 As shown, when the hand contacts any Cell, the Cell will scan the position of the Cell and detect physical touch, and send a physical touch signal to the driving layer 102. The touch driving unit 1021 determines whether there is physical touch and determines the physical touch area based on the received physical touch signal.

[0169] In a specific example, Fig.14 As shown, the touch component 1 first executes step S1401 to scan 2 to 3 frames, and further executes step S1402 to determine whether there is body touch.

[0170] Specifically, after the touch driving unit 1021 receives a limb touch signal sent from any Cell, before determining the number of Cells sending the limb touch signal, it can further determine whether the same limb touch signal sent by the same Cell appears for multiple consecutive frames.

[0171] Among them, each Cell is scanned in the scanning stage of each frame. When physical touch is scanned in the scanning stage of three consecutive frames, it is considered that physical touch has occurred; if physical touch is not scanned in the scanning stage of multiple consecutive frames, it is considered that no physical touch has occurred at the Cell position; if the physical touch scanned by the Cell fails to continue for multiple frames, it is considered that the physical touch occurring at the Cell position is a false touch.

[0172] Based on this, step S1403 is further executed to determine whether the number of cells touched by the body is greater than or equal to 17.

[0173] Specifically, cells that send body touch signals for multiple consecutive frames are determined, the number of cells is determined, and the body touch area is determined according to the number.

[0174] When the judgment result is yes, that is, the number of cells sending limb touch signals is greater than or equal to 17, it can be considered that the limb is in stable contact with the sensing layer 101 .

[0175] Based on this, step S1404 is executed to determine the body touch area.

[0176] Specifically, the Cell that sends the limb touch signal can be determined as the limb touch area. It can be seen that in this case, the limb touch area can be, for example Figure 4 The irregular limb touch area shown is the palm area.

[0177] In some other embodiments, for the convenience of calculation, a regular body touch area including the Cell that sends the body touch signal may also be determined, that is, Figure 4 The square area shown contains the palm area.

[0178] Furthermore, when the judgment result of step S1403 is no, that is, the number of cells sending limb touch signals is less than 17, it is considered that the limb has not touched the sensing layer 101. Figure 1 Stable contact shown.

[0179] Based on this, step S1405 is executed and it is determined to be other behavior; and Fig.14 As shown, after completing step S1405, return to step S1401.

[0180] Specifically, when the number of cells sending body touch signals is less than 17, it can be considered that an action such as writing on the touch screen with a finger has occurred, or that a body has accidentally touched the touch screen.

[0181] Further, based on completing step S1404, step S1406 is executed to close the Uplink signal.

[0182] Specifically, in each frame, the touch driving unit 1021, based on the limb touch area determined in the scanning phase, turns off the Uplink signal sent to each Cell in the limb touch area when entering the active connection phase. At the same time, the touch driving unit 1021 converts the Uplink signal input to the pixel driving unit 1022 corresponding to each Cell in the limb touch area into a low-level signal.

[0183] Specifically, Figure 5 As shown, when Figure 5 If the sensing unit 1011 of the middle sensing layer 101 is not a sensing unit 1011 in the limb touch area, then in the active connection stage, the touch driving unit 1021 will send an Uplink signal to the sensing unit 1011 through the common electrode Pcom.

[0184] Furthermore, in the active connection phase, Figure 5 The pixel driving unit 1022 corresponding to the sensing unit 1011 also receives the Uplink signal through the common electrode Pcom. Meanwhile, the touch driving unit 1021 also sends a VMD2GVL signal which is the same as the Uplink signal to the pixel driving unit 1022 .

[0185] Furthermore, when Figure 5 When the sensing unit 1011 of the middle sensing layer 101 is the sensing unit 1011 in the body touch area, in the active connection stage, the touch driving unit 1021 turns off the Uplink signal originally sent to the sensing unit 1011 through the common electrode Pcom.

[0186] Based on this, in the active connection stage, when the touch driving unit 1021 turns off the Uplink signal output to the common electrode Pcom, the pixel driving unit 1022 corresponding to the sensing unit 1011 cannot access the original Uplink signal through the common electrode Pcom, and the common electrode Pcom maintains a low potential voltage in the Uplink.

[0187] At the same time, the touch driving unit 1021 also sends a VMD2GVL signal which is the same as the low level signal to the pixel driving unit 1022 .

[0188] Among them, in the active connection stage, when the touch driving unit 1021 closes sending the Uplink signal to the sensing unit 1011, that is, when the sensing unit 1011 belongs to the limb touch area, the VMD2GVL signal sent to the corresponding pixel driving unit 1022 will be converted into a low-level signal. The low-level signal can be, for example, a signal that always maintains a low potential voltage of 5V.

[0189] Based on this, in the active connection stage, regardless of whether the limb touch area is determined and whether the touch driving unit 1021 turns off the Uplink signal output to the sensing unit 1011, the pixel driving unit 1022 can keep the voltage difference between the common electrode Pcom and the VMD2VGL signal consistent, so that the pixel driving unit 1022 does not leak electricity and the pixel can remain stably lit.

[0190] Meanwhile, in the active connection stage, any Cell belonging to the body touch area cannot receive the Uplink signal from the driving layer 102 and thus does not output the Uplink signal to the outside.

[0191] In this embodiment, if Figure 7As shown, each pixel driving unit 1022 includes a TFT (transistor), a bootstrap capacitor C2, a pixel, a common electrode Pcom, a second capacitor C2 and a resistor R.

[0192] Based on the limb touch area determined in step S1404, in the display interval, the touch driving unit 1021 does not turn off the Uplink signal sent to the common electrode Pcom of the corresponding pixel driving unit 1022. The source-drain voltage Vgd of the TFT is the difference between the low potential of the gate voltage Vg and the low potential of the drain voltage Vd, that is, Vgd=Vg-Vd=-11V-5V=-16V.

[0193] Furthermore, the VMD signal connected to the gate of the TFT is replaced with a VMD2VGL signal. The VMD2VGL signal can generate a VMD signal when the touch driving unit 1021 does not close the Uplink sent to the sensing unit 1011, and generate a VGL signal (low level signal) when the touch driving unit 1021 closes the Uplink sent to the sensing unit 1011. The VGL signal is a signal to maintain a low potential voltage of the VMD signal.

[0194] Based on this, when entering the active connection stage of the touch driving interval, based on the limb touch area determined in step S1404, when the touch driving unit 1021 turns off the Uplink sent to the sensing unit 1011, the corresponding pixel driving unit 1022 is also unable to receive the Uplink signal from the common electrode Pcom, and the common voltage Vcom of the common electrode Pcom is maintained at the low potential of the Uplink signal, that is, 5V. Therefore, the gate voltage Vd of the TFT is also maintained at 5V through the voltage obtained by the bootstrap capacitor C2, and the gate voltage Vg converts the VMD signal to VGL and is maintained at -11V, forming the following Fig.10 The signal waveform is shown.

[0195] At this time, the source-drain voltage Vgd of the TFT is the difference between the gate voltage Vg and the drain voltage Vd, that is, Vgd=Vg-Vd=-11V-5V=-16V.

[0196] It can be seen that when the sensing unit 1011 is in contact with the limb, the source-drain voltage Vgd of the TFT can still remain consistent in the display interval and the touch drive interval, so that the TFT will not leak electricity, and then the voltage Vpixel of the pixel connected to the drain is also consistent in the display interval and the touch drive interval, so that the pixel can be stably lit in both the display interval and the touch drive interval.

[0197] Further, based on completing step S1406, step S1407 is executed to determine whether physical touch still exists.

[0198] Furthermore, when it is determined that there is still physical touch, that is, the determination result of step S1407 is yes, step S1408 is further executed to check and update the physical touch area.

[0199] Specifically, when it is determined that the physical touch still exists, the Cell that sends the physical touch signal is re-determined, and when the Cell that sends the physical touch signal changes, the physical touch area is updated again, that is, returning to step S1404.

[0200] Further, when it is determined that there is no physical touch, that is, the determination result of step S1407 is no, step S1409 is further executed to resume turning on the Uplink signal and clear the physical touch area data.

[0201] Specifically, the touch driving unit 1021 resends the closed Uplink to the common electrode Pcom, and clears the relevant data of the limb touch area determined in the above steps.

[0202] In another embodiment of the present application, in each frame, after the touch driving unit 1021 determines the limb touch area, when entering the active connection stage, it turns off the Uplink signal sent to each Cell in the limb touch area, and connects the inverted signal with the opposite phase to the Uplink signal. At the same time, the touch driving unit 1021 converts the Uplink signal input to the pixel driving unit 1022 corresponding to each Cell in the limb touch area into a low-level signal.

[0203] In a specific example, Fig.15 As shown, the touch component 1 first executes step S1501 to scan 2 to 3 frames, and further executes step S1502 to determine whether there is body touch.

[0204] Specifically, after the touch driving unit 1021 receives a limb touch signal sent from any Cell, before determining the number of Cells sending the limb touch signal, it can further determine whether the same limb touch signal sent by the same Cell appears for multiple consecutive frames.

[0205] Among them, each Cell is scanned in the scanning stage of each frame. When physical touch is scanned in the scanning stage of three consecutive frames, it is considered that physical touch has occurred; if physical touch is not scanned in the scanning stage of multiple consecutive frames, it is considered that no physical touch has occurred at the Cell position; if the physical touch scanned by the Cell fails to continue for multiple frames, it is considered that the physical touch occurring at the Cell position is a false touch.

[0206] Based on this, step S1503 is further executed to determine whether the number of cells touched by the body is greater than or equal to 17.

[0207] Specifically, cells that send body touch signals for multiple consecutive frames are determined, the number of cells is determined, and the body touch area is determined according to the number.

[0208] When the judgment result is yes, that is, the number of cells sending limb touch signals is greater than or equal to 17, it can be considered that the limb is in stable contact with the sensing layer 101 .

[0209] Based on this, step S1504 is executed to determine the body touch area.

[0210] Specifically, the Cell that sends the limb touch signal can be determined as the limb touch area. It can be seen that in this case, the limb touch area can be, for example Figure 4 The irregular limb touch area shown is the palm area.

[0211] In some other embodiments, for the convenience of calculation, a regular body touch area including the Cell that sends the body touch signal may also be determined, that is, Figure 4 The square area shown contains the palm area.

[0212] Furthermore, when the judgment result of step S1503 is no, that is, the number of cells sending limb touch signals is less than 17, it is considered that the limb has not touched the sensing layer 101. Figure 1 Stable contact shown.

[0213] Based on this, step S1505 is executed and it is determined to be other behavior; and Fig.15 As shown, after completing step S1505, return to step S1501.

[0214] Specifically, when the number of cells sending body touch signals is less than 17, it can be considered that an action such as writing on the touch screen with a finger has occurred, or that a body has accidentally touched the touch screen.

[0215] Further, based on completing step S1504, step S1506 is executed to output an inverted signal.

[0216] Specifically, in each frame, the touch driving unit 1021 sends an inverted signal to each Cell in the limb touch area based on the limb touch area determined in the scanning phase when entering the active connection phase to replace the original Uplink signal. At the same time, the touch driving unit 1021 converts the Uplink signal input to the pixel driving unit 1022 corresponding to each Cell in the limb touch area into a low-level signal.

[0217] Specifically, Figure 5 As shown, when Figure 5If the sensing unit 1011 of the middle sensing layer 101 is not a sensing unit 1011 in the limb touch area, then in the active connection stage, the touch driving unit 1021 will send an Uplink signal to the sensing unit 1011 through the common electrode Pcom.

[0218] Furthermore, in the active connection phase, Figure 5 The pixel driving unit 1022 corresponding to the sensing unit 1011 also receives the Uplink signal through the common electrode Pcom. Meanwhile, the touch driving unit 1021 also sends a VMD2GVL signal which is the same as the Uplink signal to the pixel driving unit 1022 .

[0219] Furthermore, when Figure 5 When the sensing unit 1011 of the middle sensing layer 101 is the sensing unit 1011 in the limb touch area, in the active connection stage, the touch driving unit 1021 replaces the Uplink signal originally sent to the sensing unit 1011 through the common electrode Pcom with an inverted signal.

[0220] Based on this, in the active connection stage, when the touch driving unit 1021 outputs an inverted signal to the common electrode Pcom, the pixel driving unit 1022 corresponding to the sensing unit 1011 also receives the inverted signal through the common electrode Pcom to replace the originally received Uplink signal.

[0221] At the same time, the touch driving unit 1021 also sends a VMD2GVL signal which is the same as the low level signal to the pixel driving unit 1022 .

[0222] Among them, in the active connection stage, when the touch driving unit 1021 sends an inverted signal to the sensing unit 1011, that is, when the sensing unit 1011 belongs to the limb touch area, the VMD2GVL signal sent to the corresponding pixel driving unit 1022 will be converted into a low-level signal. The low-level signal can be, for example, a signal that always maintains a low potential voltage of 5V.

[0223] Based on this, in the active connection stage, regardless of whether the limb touch area is determined and whether the touch driving unit 1021 turns off the Uplink signal output to the sensing unit 1011, the pixel driving unit 1022 can keep the voltage difference between the common electrode Pcom and the VMD2VGL signal consistent, so that the pixel driving unit 1022 does not leak electricity and the pixel can remain stably lit.

[0224] Meanwhile, in the active connection stage, any Cell belonging to the body touch area cannot receive the Uplink signal from the driving layer 102 and thus does not output the Uplink signal to the outside.

[0225] In this embodiment, if Figure 7 As shown, each pixel driving unit 1022 includes a TFT (transistor), a bootstrap capacitor C2, a pixel, a common electrode Pcom, a second capacitor C2 and a resistor R.

[0226] Based on the limb touch area determined in step S1504, in the display interval, the touch driving unit 1021 does not turn off the Uplink signal sent to the common electrode Pcom of the corresponding pixel driving unit 1022. The source-drain voltage Vgd of the TFT is the difference between the low potential of the gate voltage Vg and the low potential of the drain voltage Vd, that is, Vgd=Vg-Vd=-11V-5V=-16V.

[0227] Furthermore, the VMD signal connected to the gate of the TFT is replaced with a VMD2VGL signal. The VMD2VGL signal can generate a VMD signal when the touch driving unit 1021 does not close the Uplink sent to the sensing unit 1011, and generate a VGL signal (low level signal) when the touch driving unit 1021 closes the Uplink sent to the sensing unit 1011. The VGL signal is a signal to maintain a low potential voltage of the VMD signal.

[0228] Based on this, when entering the active connection stage of the touch driving interval, based on the limb touch area determined in step S1504, when the touch driving unit 1021 sends an inverted signal to the sensing unit 1011, the corresponding pixel driving unit 1022 also receives an inverted signal from the common electrode Pcom, and then the common voltage Vcom of the common electrode Pcom is maintained at the inverted signal. Therefore, the gate voltage Vd of the TFT obtains the inverted signal through the bootstrap capacitor C2, and the gate voltage Vg converts the VMD signal to VGL and maintains at -11V, forming a voltage as shown in FIG. Fig.12 The signal waveform is shown.

[0229] At this time, the source-drain voltage Vgd of the TFT is the low-level voltage difference between the gate voltage Vg and the drain voltage Vd, that is, Vgd=Vg-Vd=-11V-5V=-16V.

[0230] It can be seen that when the sensing unit 1011 is in contact with the limb, the source-drain voltage Vgd of the TFT can still remain consistent in the display interval and the touch drive interval, so that the TFT will not leak electricity, and then the voltage Vpixel of the pixel connected to the drain is also consistent in the display interval and the touch drive interval, so that the pixel can be stably lit in both the display interval and the touch drive interval.

[0231] Further, based on completing step S1506, step S1507 is executed to determine whether physical touch still exists.

[0232] Furthermore, when it is determined that there is still physical touch, that is, the determination result of step S1507 is yes, step S1508 is further executed to check and update the physical touch area.

[0233] Specifically, when it is determined that the physical touch still exists, the Cell that sends the physical touch signal is re-determined, and when the Cell that sends the physical touch signal changes, the physical touch area is updated again, that is, returning to step S1504.

[0234] Further, when it is determined that there is no physical touch, that is, the determination result of step S1507 is no, step S1509 is further executed to resume turning on the Uplink signal and clear the physical touch area data.

[0235] Specifically, the touch driving unit 1021 resends the closed Uplink to the common electrode Pcom, and clears the relevant data of the limb touch area determined in the above steps.

[0236] In another embodiment of the present application, in each frame, after the touch driving unit 1021 determines the limb touch area, when entering the active connection stage, it turns off the Uplink signal sent to each Cell in the limb touch area, and connects the inverted signal with the opposite phase to the Uplink signal. At the same time, the touch driving unit 1021 converts the Uplink signal input to the pixel driving unit 1022 corresponding to each Cell in the limb touch area into a low-level signal.

[0237] It can be seen that the touch method of the embodiment of the present application is based on the sensing layer 101 scanning the limb touch, and the driving layer 102 determines the limb touch area according to the limb touch, and turns off the active pen connection signal sent to the corresponding sensing unit 1011, so that the sensing unit 1011 where the limb touch occurs in the sensing layer 101 will not receive the active pen connection signal, and thus will not output the active pen connection signal to the outside, and further, the GND of the active pen will not be coupled due to the active pen connection signal received by the hand, so that the active pen can establish a connection with the screen normally.

[0238] Specifically, Fig.16 As shown, the square wave marked as no palm is a square wave signal executed by the sensing unit 1011 without physical touch according to the touch timing; the square wave marked as with palm is a square wave signal executed by the sensing unit 1011 that has physical touch and belongs to the physical touch area according to the touch timing.

[0239] It can be seen that, according to the method in the present application, after the Uplink signal is turned off, the Uplink signal is significantly reduced.

[0240] At the same time, the touch driving unit 1021 in the driving layer 102 also replaces the active pen connection signal sent to the corresponding pixel driving unit 1022 with a low-level signal, so that no leakage occurs during the active connection stage.

[0241] Specifically, Fig.17 As shown, before the improvement, when the low-level signal is not used to replace the Uplink signal, the residual Uplink signal in the square wave signal executed by the sensing unit 1011 belonging to the limb touch area according to the touch timing indicates that there is leakage; after the improvement is performed according to the method in the present application, when the low-level signal is used to replace the Uplink signal, the position of the original Uplink signal in the square wave signal executed by the sensing unit 1011 belonging to the limb touch area according to the touch timing is changed to VGL, that is, a low-level signal, which effectively solves the leakage problem.

[0242] It should be noted that the method of the embodiment of the present application can be performed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In the case of such a distributed scenario, one of the multiple devices can only perform one or more steps in the method of the embodiment of the present application, and the multiple devices will interact with each other to complete the described method.

[0243] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0244] The method of the above embodiment is applied to realize the corresponding touch control component in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0245] Based on the same inventive concept, corresponding to the touch control component of any of the above embodiments, the present application further provides a driving substrate, wherein the driving substrate includes the touch control component as described in any of the above embodiments.

[0246] Based on the same inventive concept, corresponding to the driving substrate in the above embodiments, the present application also provides a display device, wherein the display device includes the driving substrate as described in any of the above embodiments.

[0247] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0248] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present application will be implemented (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0249] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0250] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A touch control component, characterized in that: include: Interconnected sensing and driving layers; The sensing layer is configured to receive a scanning signal sent by the driving layer and perform scanning, and in response to determining that a body touch is scanned, send a body touch signal to the driving layer; The driving layer is configured to send the scanning signal to the sensing layer, determine the limb touch area in the sensing layer in response to receiving the limb touch signal, and turn off the active pen connection signal sent to the limb touch area.

2. The touch control assembly according to claim 1, characterized in that: The sensing layer includes a plurality of sensing units; Each sensing unit is connected to the driving layer and is configured to send a limb touch signal to the driving layer in response to determining that limb touch is scanned during the scanning phase, and not output the active pen connection signal in response to determining that the active pen connection signal is not received during the active connection phase.

3. The touch control assembly according to claim 2, characterized in that: The driving layer includes: The touch drive unit is connected to each sensing unit and each pixel drive unit, and is configured to generate an active pen connection number, receive a limb touch signal sent by each sensing unit, and in response to determining that the number of sensing units sending limb touch signals is greater than or equal to a preset number threshold, form the sensing units sending limb touch signals into the limb touch area, and during the active connection stage, turn off the active pen connection signal sent to each sensing unit in the limb touch area.

4. The touch control assembly according to claim 3, characterized in that: The driving layer further comprises a plurality of pixel driving units, each pixel driving unit being connected to a corresponding sensing unit; The touch control driving unit is further configured to, in the active connection stage, in response to determining to turn off the active pen connection signal sent to the limb touch control area, convert the active pen signal sent to the corresponding pixel driving unit into a low level signal; Each pixel driving unit is configured to, in the active connection stage, in response to determining that the touch driving unit turns off the active pen connection signal sent to the corresponding sensing unit, connect the low-level signal from the touch driving unit to keep no leakage when lighting the pixel.

5. The touch control assembly according to claim 4, characterized in that: Each pixel driving unit comprises a transistor, a bootstrap capacitor and a common electrode; The common electrode is connected to the bootstrap capacitor, the corresponding sensing layer and the touch driving unit, and is configured to receive an active pen connection signal sent to the corresponding sensing unit, and in the active connection stage, in response to determining that the active pen connection signal sent to the corresponding sensing unit is turned off, maintain a low potential voltage of the active pen connection signal, and output the low potential voltage to the bootstrap capacitor; The first end of the bootstrap capacitor is connected to the common electrode, and the second end is connected to the drain of the transistor, and is configured to bootstrap the low potential voltage connected to the first end to the transistor through the second end during the active connection stage; The gate of the transistor is connected to the touch drive unit, and the drain is connected to the second end of the bootstrap capacitor. The transistor is configured such that the gate receives the active pen connection signal from the touch drive unit. During the active connection stage, in response to determining that the active pen connection signal sent to the corresponding sensing unit is turned off, the gate receives the low level signal, and the drain maintains the low potential voltage to maintain the source-drain voltage unchanged.

6. The touch control assembly according to claim 5, characterized in that: The touch drive unit is also connected to an anti-phase signal having a phase opposite to that of the active pen signal; The touch control driving unit is further configured to, in the active connection stage, send an inverted signal to the common electrode of the sensing unit and the corresponding pixel driving unit in the limb touch control area in response to determining to turn off the active pen connection signal sent to the limb touch control area; The sensing unit is further configured to receive and output the inverted signal from the touch driving unit during the active connection phase.

7. The touch control assembly according to claim 6, characterized in that: The common electrode is further configured to receive the inverted signal sent by the touch control driving unit during the active connection phase, and output the inverted signal to the bootstrap capacitor; The bootstrap capacitor is further configured to, during the active connection phase, bootstrap the inverted signal connected to the first terminal to the transistor via the second terminal; The transistor is further configured to, during the active connection phase, connect the inverted signal from the second section of the bootstrap capacitor and connect the low-level signal to the gate to maintain the source-drain voltage unchanged.

8. The touch control assembly according to claim 5 or 7, characterized in that: Each pixel driving unit further comprises a pixel; The pixel is connected to the drain electrode of the transistor and is configured to remain stably lit in response to determining that the source-drain voltage remains unchanged during the active connection stage.

9. The touch control assembly according to claim 3, characterized in that: The touch driving unit is also configured to, in response to determining that the number of sensing units sending limb touch signals is less than the number threshold, determine that the limb touch area disappears, and send the active pen connection signal to each sensing unit in the active connection stage.

10. A touch control method, characterized in that: Used to control the touch control component according to any one of claims 1 to 9, wherein the touch control component comprises a sensing layer and a driving layer; The method comprises: The sensing layer receives the scanning signal sent by the driving layer and performs scanning, and in response to determining that a body touch is scanned, sends a body touch signal to the driving layer; The driving layer sends the scanning signal to the sensing layer, determines the limb touch area in the sensing layer in response to receiving the limb touch signal, and turns off the active pen connection signal sent to the limb touch area.

11. A touch control substrate, characterized in that: The circuit substrate includes a plurality of touch control components as described in any one of claims 1 to 9.

12. A display device, characterized in that: It comprises the touch control substrate as claimed in claim 11.

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