Touch display apparatus, driver circuit thereof, and driving method therefor

Abstract

The present disclosure relates to the technical field of touch control, and specifically to a touch display apparatus, a driver circuit thereof, and a driving method therefor. The touch display apparatus comprises a display substrate (P1) and a touch control structure (T1); the driver circuit comprises a touch and display driver circuit (1) and a control circuit (2), the touch and display driver circuit (1) comprises a display driver circuit (11) and a touch driver circuit (12), the display driver circuit (11) is connected to the display substrate (P1), and the touch driver circuit (12) is connected to the touch control structure (T1); the control circuit (2) is configured to output a display driver signal to the display driver circuit (11) and transmit a touch control signal to the touch driver circuit (12); the display driver circuit (11) is configured to, in response to the display driver signal, control the display substrate (P1) to display an image, and the touch driver circuit (12) is configured to, in response to a touch control signal, control the touch control structure (T1) to sense a touch operation. The control circuit (2) is further configured to, in response to a touch reset reminder signal, control the touch driver circuit to reset, and in a reset phase, to stop outputting the touch control signal and keep outputting the display driver signal.

Description

Touch display device and its driving circuit and driving method Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically, to a touch display device, a driving circuit for the touch display device, and a driving method for the touch display device. Background Technology

[0002] Mobile phones, smartwatches and other devices typically use touch display devices to display images and enable human-computer interaction. Whether the touch function is working properly directly affects the user's use of the electronic device.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

[0004] Summary of the Invention

[0005] This disclosure provides a touch display device, a driving circuit for the touch display device, and a driving method for the touch display device.

[0006] According to one aspect of this disclosure, a driving circuit for a touch display device is provided, the touch display device including a display substrate and a touch structure; the driving circuit includes a touch display driving circuit and a control circuit, the touch display driving circuit including a display driving circuit and a touch driving circuit, the display driving circuit being connected to the display substrate, and the touch driving circuit being connected to the touch structure;

[0007] The control circuit is configured to output a display driving signal to the display driving circuit and transmit a touch signal to the touch driving circuit; the display driving circuit is configured to control the display substrate to display an image in response to the display driving signal, and the touch driving circuit is configured to control the touch structure to sense touch operation in response to the touch signal;

[0008] The control circuit is also configured to control the touch driving circuit to reset in response to a touch reset reminder signal, and during the reset phase, to stop outputting the touch signal while maintaining the output of the display driving signal.

[0009] In one exemplary embodiment of this disclosure, the touch driving circuit is configured to restart in response to a touch reset signal, and to output a touch reset end signal to the control circuit after writing touch initialization data;

[0010] The control circuit is configured to output the touch reset signal in response to the touch reset reminder signal, and to output the touch initialization data after the touch driver circuit has completed restarting; and, after receiving the touch reset reminder signal but before receiving the touch reset end signal, to stop transmitting the touch signal and continue outputting the display driver signal.

[0011] In one exemplary embodiment of this disclosure, the control circuit includes a storage circuit and a processing circuit; the storage circuit is configured to store the touch initialization data and output the touch initialization data after the touch driving circuit completes a restart;

[0012] The processing circuit is configured to output the touch reset signal to the touch driver circuit through the storage circuit in response to the touch reset reminder signal, and to close the communication between the storage circuit and the touch driver circuit before the touch driver circuit completes restart; and to stop outputting the touch signal and continue outputting the display driver signal after receiving the touch reset reminder signal and before receiving the touch reset end signal.

[0013] In one exemplary embodiment of this disclosure, the control circuit is further configured to control the display driving circuit to reset in response to a display reset reminder signal, and to stop outputting the display driving signal during the reset phase.

[0014] In one exemplary embodiment of this disclosure, the display driving circuit is further configured to restart in response to a display reset signal, and to output a display reset end signal after writing display initialization data;

[0015] The control circuit is configured to output the display reset signal in response to the display reset reminder signal, output display initialization data after the display driver circuit completes restart, and stop outputting the display driver signal after receiving the display reset reminder signal and before receiving the display reset end signal, while maintaining the output of the display driver signal.

[0016] In one exemplary embodiment of this disclosure, the control circuit is further configured to control the display driving circuit and the touch driving circuit to reset in response to the display reset reminder signal, and to stop outputting the display driving signal and the touch signal during the reset phase.

[0017] In one exemplary embodiment of this disclosure, the display driving circuit is configured to restart in response to a display reset signal, and the touch driving circuit is configured to restart in response to a touch reset signal;

[0018] The display driving circuit is further configured to output a reset end signal after writing display initialization data; or, the touch driving circuit is further configured to output the reset end signal after writing touch initialization data.

[0019] The control circuit is configured to output the display reset signal and the touch reset signal in response to the display reset reminder signal, and to output the display initialization data after the display driver circuit completes restart, and to output the touch initialization data after the touch driver circuit completes restart; and to stop outputting the display driver signal and the touch signal after receiving the display reset reminder signal and before receiving the reset end signal.

[0020] In one exemplary embodiment of this disclosure, the control circuit includes a storage circuit and a processing circuit; the storage circuit is configured to store the touch initialization data and output the touch initialization data to the touch driving circuit after the touch driving circuit completes a restart; the processing circuit is configured to store the display initialization data.

[0021] The processing circuit is further configured to output the display reset signal and the touch reset signal in response to the display reset reminder signal, and to output the display initialization data to the display driver circuit after the display driver circuit completes restart, and to close the communication between the storage circuit and the touch driver circuit before the touch driver circuit completes restart; and to stop outputting the touch signal and the display driver signal after receiving the display reset reminder signal and before receiving the reset end signal.

[0022] In one exemplary embodiment of this disclosure, the control circuit is configured to output the touch initialization data after a first delay following the output of the touch reset signal;

[0023] The control circuit is configured to output the display initialization data after a second delay following the output of the display reset signal.

[0024] In one exemplary embodiment of this disclosure, the first duration is greater than or equal to 1 / the sampling rate of the touch driving circuit for the touch structure;

[0025] The second duration is greater than or equal to 1 / the refresh rate of the display substrate by the display driving circuit.

[0026] In one exemplary embodiment of this disclosure, the touch driving circuit is configured to output a touch restart end signal to the control circuit after a restart is completed; the control circuit is configured to output the touch initialization data to the touch driving circuit in response to the touch restart end signal.

[0027] In one exemplary embodiment of this disclosure, the touch driving circuit is further configured to detect whether there is an abnormality in itself, and when an abnormality is found, to output the touch reset reminder signal to the control circuit.

[0028] In one exemplary embodiment of this disclosure, the display driving circuit is further configured to detect whether there is an abnormality in itself, and when an abnormality is found, to output the display reset reminder signal to the control circuit.

[0029] In one exemplary embodiment of this disclosure, the control circuit is further configured to receive the touch reset reminder signal output by the touch driving circuit in response to the first touch operation.

[0030] In one exemplary embodiment of this disclosure, the control circuit is further configured to receive the display reset reminder signal output by the display driving circuit in response to a second touch operation.

[0031] According to one aspect of this disclosure, a touch display device is provided, including a display substrate, a touch structure, and a driving circuit as described in any one of the above.

[0032] According to one aspect of this disclosure, a driving method for a touch display device is provided. The touch display device includes a driving circuit, a display substrate, and a touch structure. The driving circuit includes a touch display driving circuit and a control circuit. The touch display driving circuit includes a display driving circuit and a touch driving circuit. The display driving circuit is connected to the display substrate, and the touch driving circuit is connected to the touch structure. The control circuit is configured to output a display driving signal to the display driving circuit and to transmit a touch signal to the touch driving circuit.

[0033] The driving method includes:

[0034] The touch driver circuit is reset in response to the touch reset reminder signal, and during the reset phase, the output of the touch signal is stopped while the output of the display driver signal is maintained.

[0035] In one exemplary embodiment of this disclosure, the touch driving circuit is reset in response to a touch reset reminder signal; including:

[0036] The control circuit responds to the touch reset reminder signal by outputting a touch reset signal to the touch driving circuit to restart the touch driving circuit; and stops outputting the touch signal while maintaining the output of the display driving signal.

[0037] The control circuit outputs touch initialization data to the touch driving circuit; and stops outputting the touch signal while maintaining the output of the display driving signal.

[0038] The touch driving circuit outputs a touch reset end signal to the control circuit and resumes the output of the touch signal.

[0039] In one exemplary embodiment of this disclosure, the driving method further includes:

[0040] The control circuit responds to the display reset reminder signal to control the reset of the display driving circuit and the touch driving circuit, and during the reset phase, it stops outputting the display driving signal and the touch signal.

[0041] In one exemplary embodiment of this disclosure, the display driving circuit and the touch driving circuit are reset in response to a display reset reminder signal; including:

[0042] The control circuit responds to the display reset reminder signal by outputting a display reset signal and a touch reset signal, and stops outputting the display drive signal and the touch signal.

[0043] The display driver circuit is restarted by the display reset signal, and the touch driver circuit is restarted by the touch reset signal.

[0044] The control circuit outputs display initialization data to the display driving circuit and touch initialization data to the touch driving circuit.

[0045] The display driving circuit or the touch driving circuit outputs a reset end signal to restore the output of the display driving signal and the touch signal.

[0046] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0047] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0048] Figure 1 is a top view of one embodiment of the touch display device of this disclosure.

[0049] Figure 2 is a cross-sectional view of one embodiment of the touch display device of this disclosure.

[0050] Figure 3 is a schematic block diagram of a first embodiment of the touch display device of this disclosure.

[0051] Figure 4 is a timing diagram of the first reset method of the touch display device based on Figure 3.

[0052] Figure 5 is a timing diagram of the second reset method of the touch display device based on Figure 3.

[0053] Figure 6 is a timing diagram of the third reset method of the touch display device based on Figure 3.

[0054] Figure 7 is a timing diagram of the fourth reset method for the touch display device based on Figure 3.

[0055] Figure 8 is a schematic block diagram of a second embodiment of the touch display device of this disclosure.

[0056] Figure 9 is a timing diagram of the first reset method of the touch display device based on Figure 8.

[0057] Figure 10 is a timing diagram of the second reset method of the touch display device based on Figure 8.

[0058] Figure 11 is a timing diagram of the third reset method of the touch display device based on Figure 8.

[0059] Figure 12 is a timing diagram of the fourth reset method of the touch display device based on Figure 8. Detailed Implementation

[0060] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0061] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0062] This disclosure provides a touch display device that can be used in wearable devices such as smartwatches and wristbands, as well as in terminal devices such as mobile phones and tablets, and can also be used in virtual reality devices and augmented reality devices, etc., without any special limitations.

[0063] As shown in Figures 1 and 2, the touch display device includes a display substrate P1, a touch structure T1, and a driving circuit. The touch structure T1 can be located on the light-emitting side of the display substrate P1. Both the display substrate P1 and the touch structure T1 are connected to the driving circuit. The display substrate P1 can display images under the drive of the driving circuit, and the touch structure T1 can sense touch operations under the drive of the driving circuit to realize human-computer interaction.

[0064] As shown in Figures 3 and 8, in some embodiments of this disclosure, the driving circuit may include a display driving circuit 11, a touch driving circuit 12, and a control circuit 2, wherein both the display driving circuit 11 and the touch driving circuit 12 are connected to the control circuit 2. Simultaneously, the display driving circuit 11 is connected to the display substrate P1 and can control the display substrate P1 to display images based on display driving signals from the control circuit 2. The touch driving circuit 12 can be connected to the touch structure T1, and touch signals can be transmitted between the touch driving circuit 12 and the touch structure T1 to realize touch functionality. The touch signals may include driving signals and sensing signals. The control circuit 2 can send driving signals to the touch driving circuit 12 and can feed back sensing signals to the control circuit 2. The control circuit 2 can determine the touch position based on the signals fed back by the touch driving circuit 12 and drive the display substrate P1 to display specific images through the display driving circuit 11, thereby realizing human-computer interaction.

[0065] Furthermore, the display driver circuit 11 and the touch driver circuit 12 can be integrated into one circuit, namely the touch display driver circuit 1. The touch display driver circuit 1 can be an independent chip (TDDI, touch display driver). Of course, the display driver circuit 11 and the touch driver circuit 12 can also be two independent circuits. At the same time, the control circuit 2 can be an independent circuit, such as an application processor (AP), as long as it is connected to the display driver circuit 11 and the touch driver circuit 12 and can realize the above control functions.

[0066] The display substrate P1 can be a liquid crystal display panel, or a self-emissive display substrate P1 that directly emits light to display images using light-emitting devices. The light-emitting devices can be OLEDs (organic light-emitting diodes) using organic light-emitting materials; or LEDs (light-emitting diodes) using inorganic light-emitting materials, such as Micro LEDs (micron-sized light-emitting diodes) and Mini LEDs (sub-millimeter-sized light-emitting diodes); or QLEDs (quantum dot diodes), etc.

[0067] As shown in Figures 1 and 2, the touch display device may include a display area and a peripheral area outside the display area. Meanwhile, the display substrate P1 may include a driving backplate BP and a light-emitting layer LD disposed on one side of the driving backplate BP. The light-emitting layer LD includes multiple light-emitting devices, which can be driven to emit light by an internal driving circuit in the driving backplate BP to display an image. The driving backplate BP has pixel circuitry located within the display area and peripheral circuitry located in the peripheral area. The light-emitting devices can be driven to emit light by the peripheral circuitry and the pixel circuitry. In some embodiments of this disclosure, the driving backplate BP may include a substrate SU and a circuit layer CL located on one side of the substrate SU. The circuit layer CL includes the aforementioned internal driving circuitry.

[0068] Furthermore, as shown in Figure 2, the display substrate P1 may also include a pixel definition layer and a TFE encapsulation layer. The pixel definition layer may be disposed on the same surface of the driving backplane BP as the light-emitting devices and separates each light-emitting device. The TFE encapsulation layer may cover each light-emitting device to block external moisture and oxygen, preventing the light-emitting devices from being corroded. In some embodiments of this disclosure, the TFE encapsulation layer may be a thin-film encapsulation method, which may include at least two inorganic layers and an organic layer located between the two inorganic layers.

[0069] As shown in Figures 1 and 2, the touch structure T1 can be directly formed on the display substrate P1, or it can be pre-formed and then set on the display substrate P1. Furthermore, the touch structure T1 can be a capacitive touch structure, which can be a mutual capacitance structure or a self-capacitive structure. Of course, the touch structure T1 can also be a resistive structure or other structures.

[0070] Taking a self-capacitive structure as an example, in some embodiments, the touch structure T1 may include an electrode layer, which may be divided into multiple electrode blocks. Each electrode block may serve as a touch electrode, and each touch electrode may be connected to the touch driving circuit 12 through at least one touch lead. Capacitance may be generated between the touch electrode and the finger. When the finger touches the touch, the capacitance of the touch area may change, thereby generating a touch sensing signal. The touch driving circuit 12 receives the touch sensing signal, processes it, and transmits it to the control circuit 2. The control circuit 2 may determine the touch position based on the signal provided by the touch driving circuit 12 and control the display substrate P1 to display a specific image.

[0071] The touch structure T1 may also include a buffer layer and a touch planarization layer. The buffer layer may be stacked on the surface of the encapsulation layer away from the driving backplane, and the touch electrodes may be disposed on the surface of the buffer layer away from the display substrate P1. The touch planarization layer may cover the touch electrodes to achieve planarization.

[0072] As shown in Figure 2, the touch display device may also include a polarizer POL and a transparent cover CG. The polarizer POL can be located on the side of the touch structure T1 away from the display substrate P1 to reduce reflection of ambient light. Alternatively, a color filter containing a light-filtering material can be used instead of the polarizer POL to reduce reflection. The transparent cover CG is bonded to the side of the polarizer POL away from the display substrate P1 via an adhesive layer OCA, providing protection. Users can operate the device using their fingers or styluses on the side of the transparent cover CG away from the display substrate P1.

[0073] As shown in Figure 1, the touch display device may further include a flexible circuit board 3 and a control circuit board 4. The touch display driving circuit 1 may be disposed on the flexible circuit board 3, and the control circuit 2 may be disposed on the control circuit board 4. Simultaneously, the touch display device may also include a fan-out portion located in the peripheral area. The internal driving circuit of the display substrate P1 and the touch leads of the touch structure T1 may extend to the fan-out portion. The flexible circuit board 3 may be connected to the fan-out portion, thereby connecting to the display substrate P1 and the touch structure T1. The flexible circuit board 3 is also connected to the control circuit board 4, thereby connecting the control circuit 2 to the display substrate P1 and the touch structure T1.

[0074] In some embodiments of this disclosure, the driving backplate BP of the display substrate P1 may adopt a flexible structure, and the fan-out portion bends toward the backlight side of the display substrate P1, and is connected to the control circuit board 4 via a flexible circuit board 3 on the backlight side, so as to narrow the bezel.

[0075] As shown in Figure 2, in some embodiments of this disclosure, the driving backplate BP of the display substrate P1 can adopt a flexible structure, and the flexible circuit board 3 can be stacked on the bonding part and connected to the bonding part. The flexible circuit board 3 and the bonding part can be bent together toward the backlight side of the display substrate P1, and connected to the control circuit board 4 through the flexible circuit board 3 on the backlight side, that is, the FOP bonding process (FPC On COP Bonding) is adopted.

[0076] In other embodiments of this disclosure, the driving backplane BP may also be a rigid structure, in which the flexible circuit board 3 can be bent to the backlight side of the display substrate P1 and connected to the control circuit board 4.

[0077] In some embodiments of this disclosure, for a scheme where the touch driving circuit 12 and the display driving circuit 11 are integrated into a single touch display driving circuit 1, a malfunction in the display driving circuit 11 can lead to an abnormality such as a black screen or the appearance of ripples or bright spots in the image. A malfunction in the touch driving circuit 12 can lead to touch malfunction or reduced accuracy, for example, the display driving signal and the touch signal being outside a preset range. When an abnormality occurs, the touch driving circuit 12 and the display driving circuit 11 can be reset under the control of the control circuit 2 to eliminate the abnormality. The reset process can include two stages: restarting (power off and then on) and writing initialization data. Abnormality detection can be performed independently by the touch driving circuit 12 and the display driving circuit 11; that is, the touch driving circuit 12 can detect whether it has an abnormality, and the display driving circuit 11 can detect whether it has an abnormality. If at least one of them has an abnormality, the touch display driving circuit 1 can output a reset reminder signal to the control circuit 2.

[0078] Since the touch driving circuit 12 and the display driving circuit 11 are integrated into the touch display driving circuit 1, the entire touch display driving circuit 1 can be reset. That is, if either the touch driving circuit 12 or the display driving circuit 11 malfunctions, both will be reset. The touch driving circuit 12 and the display driving circuit 11 can be connected to the control circuit 2 through a single reset interface, which saves on interfaces. The control circuit 2 can output a reset signal to the touch driving circuit 12 and the display driving circuit 11 through the reset interface, thus controlling the reset of the touch driving circuit 12 and the display driving circuit 11.

[0079] In addition, the touch display driver circuit 1 can also be reset by the control circuit 2 in a customized way. That is, if there is no abnormality in the touch display driver circuit 1, the user can reset the touch display driver circuit 1 by touch operation or pressing physical buttons. These operations can run some applications, which can reduce the risk of display and touch abnormalities, improve the problem of reduced response speed after long-term operation, and facilitate adaptation to different scenarios.

[0080] During the reset phase, the control circuit 2 does not output a display driving signal to the display driving circuit 11, so the display substrate P1 does not display an image, and the touch driving circuit 12 and the touch structure T1 do not transmit touch signals, thus making it impossible to sense touch operations. Furthermore, the display driving circuit 11 and the touch driving circuit 12 do not necessarily malfunction simultaneously. If the display driving circuit 11 is not malfunctioning, but only the touch driving circuit 12 is malfunctioning, and both the display driving circuit 11 and the touch driving circuit 12 are reset, then the state of not displaying an image during the reset phase is unnecessary. Moreover, during a custom reset, it is not possible to reset only one of the display driving circuit 11 and the touch driving circuit 12, limiting the applicable application scenarios.

[0081] Therefore, as shown in Figures 3 and 8, in some embodiments of this disclosure, the control circuit 2 can be connected to the touch driving circuit 12 and the display driving circuit 11 through different reset interfaces. For example, the control circuit 2 is connected to the touch driving circuit 12 through the touch reset interface Reset2, and the control circuit 2 is connected to the display driving circuit 11 through the display reset interface Reset. The control circuit 2 can independently control the reset of the touch driving circuit 12 and the display driving circuit 11, that is, it can control the reset of one of the touch driving circuit 12 and the display driving circuit 11, or it can reset them simultaneously; this will be described in detail below:

[0082] The touch reset reminder signal can notify the control circuit 2 that the touch drive circuit 12 needs to be reset. Upon receiving the touch reset reminder signal, the control circuit 2 can control the touch drive circuit 12 to reset. During the reset phase, the control circuit 2 stops outputting touch signals but maintains the output of display drive signals. In other words, only the touch function is reset, and the display substrate P1 can still display images normally, maintaining normal display function.

[0083] There are several sources of touch reset reminder signals, for example:

[0084] In some embodiments of this disclosure, the touch reset reminder signal can be a signal output by the touch driving circuit 12 when it determines that there is an abnormality after detecting itself. Specifically, the touch driving circuit 12 can detect itself in real time or periodically. For example, it can detect its input and output signals, which can be touch driving signals. If the detected signal does not meet the specified conditions (e.g., exceeds the preset range), it is considered that there is an abnormality in the touch driving circuit 12. At this time, it can output a touch reset reminder signal to the control circuit 2 to request a reset.

[0085] In some embodiments of this disclosure, the touch reset reminder signal may be generated based on a custom scenario rather than on the absence of a touch function malfunction. Specifically, the touch reset reminder signal may be output by the touch driving circuit 12 in response to a first touch operation. The first touch operation may be clicking or sliding a finger in a certain way, opening a specific application, or the touch display device being in a specific state (e.g., shaking).

[0086] It should be noted that the touch reset reminder signal generated based on the detection of anomalies and the touch reset reminder signal generated in a custom scenario can be transmitted to the control circuit through different interfaces, and are not limited to the same interface.

[0087] The reset process described above may include two stages: restarting (powering on the touch driver circuit 12 after it has been powered off) and writing touch initialization data. The touch initialization data is the initial data that the touch driver circuit 12 can run. During the reset, the circuit is restarted first, and then the touch initialization data is written.

[0088] In some embodiments of this disclosure, the control circuit 2 may control the touch drive circuit 12 to reset in the following ways:

[0089] Control circuit 2 stores touch initialization data and can output a touch reset signal to touch driver circuit 12 in response to a touch reset reminder signal. Touch driver circuit 12 can restart in response to the touch reset signal, and after restarting, control circuit 2 can output touch initialization data to touch driver circuit 12 to avoid writing touch initialization data during the restart process, which could lead to failure in writing initialization touch data. After touch driver circuit 12 writes touch initialization data, it can output a touch reset end signal to control circuit 2. After receiving the touch reset reminder signal but before receiving the touch reset end signal, control circuit 2 stops transmitting touch signals but can continue to output display drive signals, i.e., suspends the touch function while maintaining the display function. At the same time, control circuit 2 can resume transmitting touch signals after receiving the touch reset end signal, restoring normal touch function.

[0090] To ensure that control circuit 2 outputs touch initialization data after restarting, the following method can be used:

[0091] In some embodiments of this disclosure, the control circuit 2 may output touch initialization data after a first delay after outputting the touch reset signal. That is, the time interval between outputting the touch initialization data and outputting the touch reset signal is a first time interval. Since the restart time is limited and the restart time can be roughly determined under the condition that the structure of the touch driving circuit 12 remains unchanged, the restart time can be determined in advance by testing, so that the first time interval is greater than or equal to the restart time.

[0092] Furthermore, in some embodiments, the first duration can be greater than or equal to 1 / the sampling rate of the touch drive circuit 12 on the touch structure T1, so that the clock of writing the touch initialization data is consistent with or an integer multiple of the clock of the touch signal transmission, which makes it easier to incorporate the reset process into the timing of the normal operation process. Of course, the first duration cannot be less than the restart time.

[0093] For example, if the sampling rate is 60Hz, then the first duration is ≥ 1 / 60Hz = 16.67ms. If the sampling rate is 90Hz, then the first duration is ≥ 1 / 90Hz = 11.11ms.

[0094] In some embodiments of this disclosure, instead of using the method of delaying the writing of touch initialization data as described above, the touch driving circuit 12 can output a touch restart completion signal to the control circuit 2 after completing the restart, i.e., after power-on, notifying the control circuit 2 that the restart is complete. At this time, the control circuit 2 can respond to the touch restart completion signal and output touch initialization data to the touch driving circuit 12. In this way, the restart time can be disregarded, ensuring that the touch driving circuit 12 has already completed the restart when the touch initialization data is written, without any conflict.

[0095] The above implementation method enables independent reset of the touch driving circuit 12 without affecting the normal operation of the display function. Based on this concept, the display driving circuit 11 can also be independently reset, which will be explained in detail below:

[0096] A reset reminder signal can be displayed to notify the control circuit 2 that the display driver circuit 11 needs to be reset. Upon receiving the reset reminder signal, the control circuit 2 can control the display driver circuit 11 to reset. During the reset phase, the control circuit 2 stops outputting display drive signals but can maintain the output of touch signals. That is, only the display function can be reset, and the display substrate P1 can still display images normally, maintaining normal display function. Of course, the touch driver circuit 12 can also be reset simultaneously with the display driver circuit 11. The specific method can be referred to the above implementation method, which will not be repeated here.

[0097] There are several sources for the reset reminder signal, for example:

[0098] In some embodiments of this disclosure, the display reset reminder signal can be a signal output by the display driving circuit 11 when it determines that there is an abnormality after detecting itself. Specifically, the display driving circuit 11 can detect itself in real time or periodically. For example, it can detect its input and output signals, which can be display driving signals. If the detected signal does not meet the specified conditions (e.g., exceeds the preset range), it is considered that there is an abnormality in the display driving circuit 11. At this time, it can output a display reset reminder signal to the control circuit 2 to request a reset.

[0099] In some embodiments of this disclosure, the display reset reminder signal may be generated based on a custom scenario rather than on the absence of a display function malfunction. Specifically, the display reset reminder signal may be output by the display driving circuit 11 in response to a second touch operation. The second display operation may be clicking or sliding a finger in a certain way, opening a specific application, or the touch display device being in a specific state (e.g., shaking).

[0100] The above reset process may include two stages: restarting (powering on and off the display driver circuit 11) and writing touch initialization data. The display initialization data is the initial data that the display driver circuit 11 can run. During the reset, the restart is performed first, and then the display initialization data is written.

[0101] In some embodiments of this disclosure, the control circuit 2 controls the display driving circuit 11 to reset in the following ways:

[0102] Control circuit 2 stores display initialization data and can output a display reset signal to display driver circuit 11 in response to a display reset reminder signal. Display driver circuit 11 can restart in response to the display reset signal, and after restarting, control circuit 2 can output display initialization data to display driver circuit 11. After display driver circuit 11 writes the display initialization data, it can output a display reset end signal to control circuit 2. Upon receiving the display reset reminder signal but before receiving the display reset end signal, control circuit 2 stops transmitting display driver signals but can continue transmitting touch signals, i.e., suspending the display function while maintaining the touch function. Simultaneously, control circuit 2 can resume outputting display driver signals and restore normal display function after receiving the display reset end signal.

[0103] To ensure that the control circuit 2 outputs initialization data before the restart is complete, the following method can be used:

[0104] In some embodiments of this disclosure, the control circuit 2 may output the display initialization data after a second delay after outputting the display reset signal. That is, the time interval between outputting the display initialization data and outputting the display reset signal is the second time interval. Since the restart time is limited and the restart time can be roughly determined under the condition that the structure of the display driving circuit 11 remains unchanged, the restart time can be determined in advance by testing, so that the second time interval is greater than or equal to the restart time.

[0105] Furthermore, in some embodiments, the second duration can be greater than or equal to 1 / the refresh rate of the display driving circuit 11 on the display substrate P1, so that the clock of writing the display initialization data is consistent with or an integer multiple of the clock of the display driving signal transmission, which makes it easier to incorporate the reset process into the timing of the normal operation process. Of course, the second duration cannot be less than the restart time.

[0106] For example, if the refresh rate is 60Hz, then the second duration is ≥ 1 / 60Hz = 16.67ms. If the refresh rate is 90Hz, then the second duration is ≥ 1 / 90Hz = 11.11ms.

[0107] In some embodiments of this disclosure, instead of using the method of delaying the writing of display initialization data as described above, the display driver circuit 11 can output a display restart completion signal to the control circuit 2 after completing the restart, i.e., after power-on, notifying the control circuit 2 that the restart is complete. At this time, the control circuit 2 can respond to the display restart completion signal and output display initialization data to the display driver circuit 11. In this way, the restart time can be disregarded, ensuring that the display driver circuit 11 has already completed the restart when the display initialization data is written, without any conflict.

[0108] The above describes the scheme for independently resetting the touch driving circuit 12 and the display driving circuit 11. However, considering that users need to view images when performing touch operations, it is difficult to operate without an image, and misoperation is prone to occur. Therefore, when the display driving circuit 11 malfunctions, the touch driving circuit 12 can be reset simultaneously. That is, the reset of the display driving circuit 11 and the touch driving circuit 12 can be prompted by a display reset reminder signal. If the display function is malfunctioning but the touch function is normal, both can be reset at the same time. To this end, the control circuit 2 can also be configured to control the reset of the display driving circuit 11 and the touch driving circuit 12 in response to the display reset reminder signal, and during the reset phase, the transmission of display driving signals and touch signals is stopped.

[0109] In some embodiments of this disclosure, the control circuit 2 may control the display driving circuit 11 and the touch driving circuit 12 to reset in the following ways:

[0110] Control circuit 2 stores display initialization data and touch initialization data, and can output a display reset signal to display driver circuit 11 and a touch reset signal to touch driver circuit 12 in response to a display reset reminder signal. Display driver circuit 11 is configured to restart in response to a display reset signal, and touch driver circuit 12 is configured to restart in response to a touch reset signal. The specific restart method can be found in the description of restarting display driver circuit 11 and touch driver circuit 12 in the above-described implementation, and will not be detailed here. Specifically, after receiving the display reset reminder signal but before receiving the reset end signal, control circuit 2 stops transmitting display driver signals and touch signals. After receiving the reset end signal, it resumes transmitting display driver signals and touch signals, restoring normal display and touch functions.

[0111] In some embodiments of this disclosure, the reset end signal can be output by the display driving circuit 11 after writing the display initialization data; or, it can be output by the touch driving circuit 12 after writing the touch initialization data. The entity executing the output of the reset end signal can be selected from the latter of writing the display initialization data and writing the touch initialization data. For example, if writing the touch initialization data is later than writing the display initialization data, then the touch driving circuit 12 can output the reset end signal. The order in which the display initialization data and the touch initialization data are written can be predetermined; therefore, the entity executing the output of the reset end signal can also be predetermined, without needing real-time judgment.

[0112] Of course, in other embodiments of this disclosure, the order of writing display initialization data and writing touch initialization data does not need to be considered. After writing display initialization data, display driving circuit 11 can output display reset end signal. After writing touch initialization data, touch driving circuit 12 outputs touch reset end signal. Display reset end signal and touch reset end signal can be regarded as one reset end signal. After receiving display reset end signal and touch reset end signal, it is regarded as receiving one reset end signal. At this time, the transmission of display driving signal and touch signal can be resumed, and normal display and touch functions can be restored.

[0113] The following explanation, in conjunction with the structure of control circuit 2, will further illustrate the following:

[0114] As shown in Figures 3 and 8, in some embodiments of this disclosure, the control circuit 2 may include a storage circuit 22 and a processing circuit 21, wherein:

[0115] The storage circuit 22 is configured to store touch initialization data, which can be flash memory or other non-volatile memory. After the touch driver circuit 12 completes its restart, it can output the touch initialization data. The storage circuit 22 can communicate with the touch driver circuit 12 via the SPI protocol or other protocols to transmit touch initialization signals.

[0116] The processing circuit 21 may be an application processor or other processor, which can be connected to the touch driver circuit 12 via the IIC communication protocol or other protocols in order to transmit touch signals.

[0117] When a reset is not required, the processing circuit 21 can output a display driving signal to the display driving circuit 11 to control the display substrate P1 to display an image. The processing circuit 21 can also exchange touch signals with the touch driving circuit 12 to realize the touch function.

[0118] During reset, the processing circuit 21 can respond to the touch reset reminder signal by outputting a touch reset signal to the touch driver circuit 12 through the storage circuit 22. Before the touch driver circuit 12 completes its restart, it closes the communication between the storage circuit 22 and the touch driver circuit 12 to prevent data transmission before the restart is complete. Simultaneously, after receiving the touch reset reminder signal but before receiving the touch reset completion signal, the processing circuit 21 can stop outputting touch signals while maintaining the output of the display drive signal, thus resetting only the touch driver circuit 12.

[0119] Furthermore, the processing circuit 21 can store display initialization data, and can write display initialization data to the display driving circuit 11 through the processing circuit 21. The processing circuit 21 can control the reset of the display driving circuit 11 in response to the display touch reminder signal. The specific reset process can be referred to the implementation method above, and will not be repeated here.

[0120] In addition, the storage circuit 22 can be located on the flexible circuit board 3, and the processing circuit 21 can be located on the control circuit board 4. That is to say, the storage circuit 22 and the processing circuit 21 of the control circuit 2 can be located on different circuit boards, or they can be located on the same circuit board.

[0121] Of course, in other embodiments of this disclosure, the control circuit 2 may not use the storage circuit 22 described above. The touch initialization data and the display initialization data can both be stored in the processing circuit 21, and the touch driving circuit 12 and the display driving circuit 11 can obtain the touch initialization data and the display initialization data from the processing circuit 21.

[0122] First type of driving circuit

[0123] As shown in Figure 3, the control circuit 2 includes a storage circuit 22 and a processing circuit 21. The storage circuit 22 is a flash memory, which is connected to the touch driver circuit 12 via the SPI protocol. The storage circuit 22 may include a first power interface VSS, a second power interface VCC, a master output slave input interface MOSI, a master input slave output interface MISO, a chip select interface CS, a first clock signal interface SCLK, and a write protection interface WP. Among them, the master output slave input interface MOSI, the master input slave output interface MISO, and the first clock signal interface SCLK are connected to three different buses, which can be used to transmit touch initialization data.

[0124] The processing circuit 21 can be connected to the touch driver circuit 12 via the IIC communication protocol. It can also be connected to the touch driver circuit 12 via the second clock signal interface SCL and the data interface SDA to transmit touch signals. The processing circuit 21 can be connected to the display driver circuit 11 via the MIPI interface and can transmit display driver signals.

[0125] In addition, the processing circuit 21 can also be connected to the display driver circuit 11 via the display reset interface Reset and the display reset reminder interface EFlag. The display reset interface Reset is used to transmit the display reset signal, and the display reset reminder interface EFlag can transmit the display reset reminder signal. The processing circuit 21 can also supply power to the touch display driver circuit 1 via the power supply interface TD-PWR. The processing circuit 21 can be connected to the touch driver circuit 12 via the touch reset reminder interface INT. The touch reminder interface can transmit at least one of the touch reset reminder signal, touch reset end signal, and touch restart end signal. The processing circuit 21 can be connected to the hold interface Hold of the storage circuit 22 via the touch reset interface Reset2, and is also connected to the touch driver circuit 12. The processing circuit 21 can also be connected to the write protection interface WP and the second power interface VCC of the storage circuit 22 via the T-PWR interface to supply power to the storage circuit 22, and the first power interface VSS can be grounded or connected to a reference voltage.

[0126] Based on the first type of driving circuit described above, reset can be achieved in various ways, as illustrated below:

[0127] As shown in Figure 4, in the first reset method, only the touch drive circuit 12 malfunctions and is reset independently, while the display drive circuit 11 is normal. For example:

[0128] When the touch driver circuit 12 detects an anomaly, it outputs a low-level signal to the processing circuit 21 via the touch reset reminder interface INT, indicating that the touch driver circuit 12 needs to be reset and that communication with the touch driver circuit 12 should be avoided during this period. The processing circuit 21 outputs a low level via the touch reset interface Reset2, initiating a restart of the touch driver circuit 12. Simultaneously, the storage circuit 22 closes communication with the touch driver circuit 12 to prevent accidental operation or data retrieval by the touch driver circuit 12 during the reset phase. After restarting, the touch driver circuit 12 pulls the signal of the chip select interface CS low, downloading the touch initialization data from the storage circuit 22 to the RAM of the touch driver circuit 12 via the SCLK / MOSI / MISO interface, thus achieving the reset. After the reset is complete, the touch reset reminder interface INT sends two consecutive low-level signals to the processing circuit 21, notifying it that the reset and restart are complete and normal communication can resume. Simultaneously, the chip select interface CS goes high, closing communication with the storage circuit 22. During the above reset process, the display driver circuit 11 operates normally, and the signals of the display reset reminder interface EFlag and the display reset interface Reset are in a high-level state.

[0129] In Figure 4, TP Data represents the touch drive signal, DP Data represents the display drive signal, FW and FW Data represent the touch initialization data, and the display initialization data is not shown.

[0130] As shown in Figure 5, in the second reset method, if the display driver circuit 11 malfunctions, both the display driver circuit 11 and the touch driver circuit 12 will be reset. For example:

[0131] When the display driver circuit 11 detects an abnormality, it outputs a low-level signal to the processing circuit 21 through the display reset reminder interface EFlag, that is, it outputs a display reset reminder signal to inform the processing circuit 21 that the display driver circuit 11 needs to be reset, and that no communication should be made with the display driver circuit 11 during this period.

[0132] The display driver circuit 11 restarts by outputting a low level through the Reset interface. Simultaneously, the Reset interface connects to another touch driver circuit 12, Reset1, causing the touch driver circuit 12 to also restart. Subsequently, a low level is sent to the processing circuit 21 via the INT interface to inform it that the touch driver circuit 12 needs to be reset, and that communication with the touch driver circuit 12 should be avoided during this period. After restarting, the touch driver circuit 12 pulls the signal of the chip select interface CS low, downloading the touch initialization data from the storage circuit 22 to the RAM of the touch driver circuit 12 via the SCLK / MOSI / MISO interface, thus achieving the reset. After the reset is complete, the INT interface sends two consecutive low levels to the processing circuit 21 to notify it that the reset and restart are complete and normal communication can resume. Simultaneously, the voltage of the chip select interface CS goes high, closing communication with the storage circuit 22. The reset of the display driver circuit 11 can be completed before the touch initialization data is written, after which normal display and touch operation can begin.

[0133] As shown in Figure 6, in the third reset method, only the touch drive circuit 12 is reset when there is no abnormality, while the display drive circuit 11 displays normally. For example:

[0134] The touch reset reminder signal is not transmitted through the reset reminder interface INT. It can be generated through other means. The control processing circuit 21 outputs a low level through the touch reset interface Reset2, causing the touch driver circuit 12 to restart. The storage circuit 22 then closes its communication with the touch driver circuit 12, preventing accidental operation and data retrieval by the touch driver circuit 12 during the reset phase. After the touch driver circuit 12 restarts, it pulls the signal of the chip select interface CS low, downloading the touch initialization data from the storage circuit 22 to the RAM of the touch driver circuit 12 via the SCLK / MOSI / MISO interface, thus achieving a reset. After the reset is complete, the touch reset reminder interface INT sends two consecutive low levels to the processing circuit 21, notifying it that the reset and restart are complete and normal communication can resume. Simultaneously, the chip select interface CS goes high, closing communication with the storage circuit 22. During the above reset process, the display driver circuit 11 operates normally, and the signals of the display reset reminder interface EFlag and the display reset interface Reset are both at high levels.

[0135] As shown in Figure 7, in the fourth reset method, both the display driver circuit 11 and the touch driver circuit 12 are reset when there is no abnormality. For example:

[0136] The touch reset reminder signal is not transmitted through the reset reminder interface INT; it can be generated through other methods. The control processing circuit 21 outputs a low level through the display reset interface Reset, causing the display driver circuit 11 to restart. Simultaneously, the display reset interface Reset is also connected to another touch reset interface Reset1 of the touch driver circuit 12, causing the touch driver circuit 12 to also restart. After restarting, the touch driver circuit 12 pulls the signal of the chip select interface CS low, downloading the touch initialization data from the storage circuit 22 to the RAM of the touch driver circuit 12 through the SCLK / MOSI / MISO interface, thus achieving a reset. After the reset is complete, the touch reset reminder interface INT sends two consecutive low levels to the processing circuit 21, notifying it that the reset and restart are complete and normal communication can resume. Simultaneously, the voltage of the chip select interface CS is pulled high, closing communication with the storage circuit 22. The reset of the display driver circuit 11 can be completed before the touch initialization data is written, after which normal display and touch operation can begin.

[0137] The second type of driving circuit

[0138] As shown in Figure 8, the control circuit 2 does not use the storage circuit 22, but includes a processing circuit 21. The processing circuit 21 can be connected via the IIC communication protocol. It can also be connected to the touch driver circuit 12 via the second clock signal interface SCL and the data interface SDA to transmit touch signals. The processing circuit 21 can be connected to the display driver circuit 11 via the MIPI interface and can transmit display drive signals.

[0139] In addition, the processing circuit 21 can also be connected to the display driver circuit 11 via the display reset interface and the display reset reminder interface EFlag. The display reset interface Reset is used to transmit the display reset signal, and the display reset reminder interface EFlag can transmit the display reset reminder signal. The processing circuit 21 can also supply power to the touch display driver circuit 1 via the power supply interface TD-PWR. The processing circuit 21 can be connected to the touch driver circuit 12 via the touch reset reminder interface INT. The touch reminder interface can transmit at least one of the touch reset reminder signal, the touch reset end signal, and the touch restart end signal. The processing circuit 21 can be connected to the touch driver circuit 12 via the touch reset interface Reset2.

[0140] Based on the second driving circuit described above, reset can be achieved in various ways, as illustrated below:

[0141] As shown in Figure 9, in the first reset method, only the touch drive circuit 12 is abnormal, while the display drive circuit 11 is normal. For example:

[0142] When the touch driver circuit 12 detects an anomaly, it outputs a low-level signal to the processing circuit 21 via the touch reset reminder interface INT, indicating that the touch driver circuit 12 needs to be reset and that communication with the touch driver circuit 12 should be avoided during this period. The touch driver circuit 12 then restarts by outputting a low level via the touch reset interface Reset2. After a delay of a first duration (e.g., greater than 16.67ms), the touch initialization data is downloaded from the processing circuit 21 to the RAM of the touch driver circuit 12 via the SCL and SDA interfaces, thus completing the reset. After the reset is complete, the touch reset reminder interface INT sends two consecutive low-level signals to the processing circuit 21, notifying it that the reset and restart are complete and normal communication can resume. During this reset process, the display driver circuit 11 operates normally, and the signals of the display reset reminder interface EFlag and the display reset interface Reset are both at high levels.

[0143] As shown in Figure 10, in the second reset method, if the display driver circuit 11 malfunctions, both the display driver circuit 11 and the touch driver circuit 12 will be reset. For example:

[0144] When the display driver circuit 11 detects an abnormality, it outputs a low-level signal to the processing circuit 21 through the display reset reminder interface EFlag, that is, it outputs a display reset reminder signal to inform the processing circuit 21 that the display driver circuit 11 needs to be reset, and that no communication should be made with the display driver circuit 11 during this period.

[0145] The display driver circuit 11 restarts by outputting a low level through the Reset interface. Simultaneously, the Reset interface connects to another touch driver circuit 12, Reset1, causing the touch driver circuit 12 to also restart. Subsequently, a low level is sent to the processing circuit 21 via the INT interface to inform it that the touch driver circuit 12 needs to be reset, and that communication with the touch driver circuit 12 should be avoided during this period. After restarting, the touch driver circuit 12 pulls the CS signal of its chip select interface low, downloading touch initialization data from the processing circuit 21 to its RAM via the SCL and SDA interfaces, thus achieving the reset. After the reset is complete, the INT interface sends two consecutive low levels to the processing circuit 21 to notify it that the reset and restart are complete and normal communication can resume. The reset of the display driver circuit 11 can be completed before the touch initialization data is written, after which normal display and touch operation can begin.

[0146] As shown in Figure 11, in the third reset method, under normal conditions, only the touch drive circuit 12 is reset, while the display drive circuit 11 remains normal. For example:

[0147] The touch reset reminder signal is not transmitted through the reset reminder interface INT. It can be generated through other methods. The control processing circuit 21 outputs a low level through the touch reset interface Reset2, and the touch driver circuit 12 starts restarting. After a first delay (e.g., greater than 16.67ms), touch initialization data is downloaded from the processing circuit 21 to the RAM of the touch driver circuit 12 through the SCL and SDA interfaces, thus achieving a reset. After the reset is complete, the touch reset reminder interface INT sends two consecutive low levels to the processing circuit 21 to notify it that the reset and restart are complete and normal communication can resume. During the reset process, the display driver circuit 11 operates normally, and the signals of the display reset reminder interface EFlag and the display reset interface Reset are both at high levels.

[0148] As shown in Figure 12, the fourth reset method is used when the display driver circuit 11 malfunctions. Both the display driver circuit 11 and the touch driver circuit 12 are reset. For example:

[0149] The touch reset reminder signal is not transmitted through the reset reminder interface INT; it can be generated through other means. The control processing circuit 21 outputs a low level through the display reset interface Reset, causing the display driver circuit 11 to restart. Simultaneously, the display reset interface Reset is also connected to another touch reset interface Reset1 of the touch driver circuit 12, causing the touch driver circuit 12 to also restart. After restarting, the touch driver circuit 12, after a first delay (e.g., greater than 16.67ms), downloads the touch initialization data from the processing circuit 21 to the RAM of the touch driver circuit 12 through the SCL and SDA interfaces, thus achieving a reset. After the reset is complete, the touch reset reminder interface INT sends two consecutive low levels to the processing circuit 21, notifying it that the reset and restart are complete and normal communication can resume. The reset of the display driver circuit 11 can be completed before the touch initialization data is written, after which normal display and touch operation can begin.

[0150] This disclosure also provides a driving method for a touch display device. The structure and effects of the touch display device can be referred to the embodiments described above, and will not be described in detail here. The driving method may include:

[0151] The touch driver circuit 12 is reset in response to the touch reset reminder signal. During the reset phase, the output of touch signals is stopped, while the output of display driver signals is maintained.

[0152] In some embodiments of this disclosure, the touch drive circuit 12 is reset in response to a touch reset reminder signal; including:

[0153] The control circuit 2 responds to the touch reset reminder signal and outputs a touch reset signal to the touch driver circuit 12 to restart the touch driver circuit 12; and stops outputting touch signals while maintaining the output of display drive signals.

[0154] The control circuit 2 outputs touch initialization data to the touch driver circuit 12; and stops outputting touch signals while maintaining the output of display driver signals.

[0155] The touch driver circuit 12 outputs a touch reset end signal to the control circuit 2 and restores the output touch signal.

[0156] In some embodiments of this disclosure, the driving method further includes:

[0157] The control circuit 2 responds to the display reset reminder signal to control the display driver circuit 11 and the touch driver circuit 12 to reset, and during the reset phase, it stops outputting the display driver signal and the touch signal.

[0158] In some embodiments of this disclosure, the display driving circuit 11 and the touch driving circuit 12 are reset in response to a display reset reminder signal; including:

[0159] The control circuit 2 responds to the display reset reminder signal by outputting the display reset signal and the touch reset signal, and stops outputting the display drive signal and the touch signal;

[0160] The display driver circuit 11 is restarted by a display reset signal, and the touch driver circuit 12 is restarted by a touch reset signal.

[0161] The control circuit 2 outputs display initialization data to the display driving circuit 11 and touch initialization data to the touch driving circuit 12.

[0162] The display driving circuit 11 or the touch driving circuit 12 outputs a reset end signal to restore the output of the display driving signal and the touch signal.

[0163] The principle of the driving method has been explained in detail in the above description of the driving circuit and the implementation of the touch display device, and will not be repeated here.

[0164] It should be noted that although the steps of the control method in this disclosure are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additional or alternative steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0165] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A driving circuit for a touch display device, the touch display device comprising a display substrate and a touch structure; the driving circuit comprising a touch display driving circuit and a control circuit, the touch display driving circuit comprising a display driving circuit and a touch driving circuit, the display driving circuit being connected to the display substrate, and the touch driving circuit being connected to the touch structure; The control circuit is configured to output a display driving signal to the display driving circuit and transmit a touch signal to the touch driving circuit; the display driving circuit is configured to control the display substrate to display an image in response to the display driving signal, and the touch driving circuit is configured to control the touch structure to sense touch operation in response to the touch signal; The control circuit is also configured to control the touch driving circuit to reset in response to a touch reset reminder signal, and during the reset phase, to stop outputting the touch signal while maintaining the output of the display driving signal.

2. The driving circuit according to claim 1, wherein, The touch driving circuit is configured to restart in response to a touch reset signal, and to output a touch reset end signal to the control circuit after writing touch initialization data; The control circuit is configured to output the touch reset signal in response to the touch reset reminder signal, and to output the touch initialization data after the touch driver circuit has completed restarting; and, after receiving the touch reset reminder signal but before receiving the touch reset end signal, to stop transmitting the touch signal and continue outputting the display driver signal.

3. The driving circuit according to claim 2, wherein, The control circuit includes a storage circuit and a processing circuit; the storage circuit is configured to store the touch initialization data and output the touch initialization data after the touch driving circuit completes a restart; The processing circuit is configured to output the touch reset signal to the touch driver circuit through the storage circuit in response to the touch reset reminder signal, and to close the communication between the storage circuit and the touch driver circuit before the touch driver circuit completes restart; and to stop outputting the touch signal and continue outputting the display driver signal after receiving the touch reset reminder signal and before receiving the touch reset end signal.

4. The driving circuit according to claim 1, wherein, The control circuit is also configured to control the display driver circuit to reset in response to a display reset reminder signal, and to stop outputting the display driver signal during the reset phase.

5. The driving circuit according to claim 4, wherein, The display driving circuit is also configured to restart in response to a display reset signal, and to output a display reset end signal after writing display initialization data; The control circuit is configured to output the display reset signal in response to the display reset reminder signal, output display initialization data after the display driver circuit completes restart, and stop outputting the display driver signal after receiving the display reset reminder signal and before receiving the display reset end signal, while maintaining the output of the display driver signal.

6. The driving circuit according to claim 4, wherein, The control circuit is also configured to control the display driving circuit and the touch driving circuit to reset in response to the display reset reminder signal, and to stop outputting the display driving signal and the touch signal during the reset phase.

7. The driving circuit according to claim 6, wherein, The display driving circuit is configured to restart in response to a display reset signal, and the touch driving circuit is configured to restart in response to a touch reset signal; The display driving circuit is further configured to output a reset end signal after writing display initialization data; or, the touch driving circuit is further configured to output the reset end signal after writing touch initialization data. The control circuit is configured to output the display reset signal and the touch reset signal in response to the display reset reminder signal, and to output the display initialization data after the display driver circuit completes restart, and to output the touch initialization data after the touch driver circuit completes restart; and to stop outputting the display driver signal and the touch signal after receiving the display reset reminder signal and before receiving the reset end signal.

8. The driving circuit according to claim 7, wherein, The control circuit includes a storage circuit and a processing circuit; the storage circuit is configured to store the touch initialization data and output the touch initialization data to the touch driving circuit after the touch driving circuit completes a restart; the processing circuit is configured to store the display initialization data. The processing circuit is further configured to output the display reset signal and the touch reset signal in response to the display reset reminder signal, and to output the display initialization data to the display driving circuit after the display driving circuit completes restart, and to close the communication between the storage circuit and the touch driving circuit before the touch driving circuit completes restart; and to stop outputting the touch reset signal after receiving the display reset reminder signal and before receiving the reset end signal. Control signals and the display drive signals.

9. The driving circuit according to claim 7, wherein, The control circuit is configured to output the touch initialization data after a first delay following the output of the touch reset signal; The control circuit is configured to output the display initialization data after a second delay following the output of the display reset signal.

10. The driving circuit according to claim 9, wherein, The first duration is greater than or equal to 1 / the sampling rate of the touch driving circuit for the touch structure; The second duration is greater than or equal to 1 / the refresh rate of the display substrate by the display driving circuit.

11. The driving circuit according to claim 2, wherein, The touch driving circuit is configured to output a touch restart end signal to the control circuit after a restart is completed; the control circuit is configured to output the touch initialization data to the touch driving circuit in response to the touch restart end signal.

12. The driving circuit according to claim 1, wherein, The touch driving circuit is also configured to detect whether there is an abnormality in itself, and when an abnormality is found, to output the touch reset reminder signal to the control circuit.

13. The driving circuit according to claim 4, wherein, The display driving circuit is also configured to detect whether there is an abnormality in itself, and when an abnormality is found, to output the display reset reminder signal to the control circuit.

14. The driving circuit according to claim 1, wherein, The control circuit is also configured to receive the touch reset reminder signal output by the touch drive circuit in response to the first touch operation.

15. The driving circuit according to claim 4, wherein, The control circuit is also configured to receive the display reset reminder signal output by the display driver circuit in response to the second touch operation.

16. A touch display device, comprising a display substrate, a touch structure, and a driving circuit as described in any one of claims 1-15.

17. A driving method for a touch display device, the touch display device comprising a driving circuit, a display substrate, and a touch structure; the driving circuit comprising a touch display driving circuit and a control circuit, the touch display driving circuit comprising a display driving circuit and a touch driving circuit, the display driving circuit being connected to the display substrate, and the touch driving circuit being connected to the touch structure; the control circuit being configured to output a display driving signal to the display driving circuit and to transmit a touch signal to the touch driving circuit; The driving method includes: The touch driver circuit is reset in response to the touch reset reminder signal, and during the reset phase, the output of the touch signal is stopped while the output of the display driver signal is maintained.

18. The driving method according to claim 17, wherein, Responding to a touch reset reminder signal to control the touch driving circuit to reset; including: The control circuit responds to the touch reset reminder signal by outputting a touch reset signal to the touch driving circuit to restart the touch driving circuit; and stops outputting the touch signal while maintaining the output of the display driving signal. The control circuit outputs touch initialization data to the touch driving circuit; and stops outputting the touch signal while maintaining the output of the display driving signal. The touch driving circuit outputs a touch reset end signal to the control circuit and resumes the output of the touch signal.

19. The driving method according to claim 17, wherein, The driving method further includes: The control circuit responds to the display reset reminder signal to control the reset of the display driving circuit and the touch driving circuit, and during the reset phase, it stops outputting the display driving signal and the touch signal.

20. The driving method according to claim 19, wherein, Responding to a display reset reminder signal, the display driving circuit and the touch driving circuit are reset; including: The control circuit responds to the display reset reminder signal by outputting a display reset signal and a touch reset signal, and stops outputting the display drive signal and the touch signal. The display driver circuit is restarted by the display reset signal, and the touch driver circuit is restarted by the touch reset signal. The control circuit outputs display initialization data to the display driving circuit and touch initialization data to the touch driving circuit. The display driving circuit or the touch driving circuit outputs a reset end signal to restore the output of the display driving signal and the touch signal.

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