Display device and control method thereof

Abstract

The application discloses a display device and a control method thereof. A power management module generates a detection control signal following the level change of a first power signal output by a main control module, so that a synchronous control module controls the on-off of a transmission path for transmitting a second power signal between the main control module and a touch driving module according to the detection control signal. When the first power signal is provided to the power management module and the power management module generates a plurality of display power supply signals according to the first power signal, the synchronous control module also controls the transmission path for transmitting the second power signal between the main control module and the touch driving module to be connected. Therefore, when the first power signal is powered off, the synchronous control module controls the transmission path for transmitting the second power signal between the main control module and the touch driving module to be disconnected, so that the display power supply and the touch power supply are synchronously powered on and powered off.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device and its control method. Background Technology

[0002] In designs where the display driver chip and touch driver chip are separate, the timing sequence of the display driver chip and touch driver chip must be strictly set to enable the display panel to perform both display and touch functions simultaneously. However, the power signals used to control the display and the power signals used to control the touch are controlled by different control units of different main control modules, and the touch power supply is also reused as the power supply for some units in the main control module. Synchronizing the power supply and power-off of the touch power supply with the display power supply is quite difficult. Summary of the Invention

[0003] This application provides a display device and its control method, which can enable the display power supply and the touch power supply to be powered on and off synchronously.

[0004] To achieve the above objectives, this application provides a display device, including a main control module, a power management module, a touch driving module, a display panel, and a synchronization control module. The main control module is configured to output a first power signal and a second power signal. The power management module is electrically connected to the main control module and is configured to generate multiple display power supply signals and a detection control signal whose level changes follow the level changes of the first power signal, based on the first power signal. The touch driving module is electrically connected to the main control module and the power management module and is configured to generate a touch driving signal under the influence of the power supplied by the second power signal. The display panel is electrically connected to the power management module and the touch driving module. The display panel includes multiple sub-pixels and multiple touch electrodes. The display panel is configured to control the multiple sub-pixels to display an image based on the power supplied by the display power supply signals and to control the touch electrodes to perform touch sensing based on the touch driving signals. The synchronization control module is electrically connected to the main control module, the power management module, and the touch driving module and is configured to control the on / off state of the transmission path for transmitting the second power signal between the main control module and the touch driving module based on the detection control signal.

[0005] This application also provides a control method for a display device, applicable to any of the aforementioned display devices. The control method includes: receiving a first power signal and generating a detection control signal whose level changes follow the level changes of the first power signal; and connecting or disconnecting a transmission path for transmitting a second power signal between a main control module and a touch drive module based on the detection control signal.

[0006] The above technical solution incorporates a synchronization control module electrically connected to the main control module, touch driver module, and power management module within the display device. The power management module generates a detection control signal whose level changes follow the level changes of the first power signal output by the main control module. This allows the synchronization control module to control the connection and disconnection of the transmission path for the second power signal between the main control module and the touch driver module based on the detection control signal. When the touch driver module receives the second power signal, it generates a touch driver signal under the influence of the electrical energy provided by the second power signal. Because the level changes of the detection control signal follow the level changes of the first power signal, when the first power signal is provided to the power management module and the power management module generates multiple display power supply signals accordingly, the synchronization control module also controls the connection and continuity of the transmission path for the second power signal between the main control module and the touch driver module. Therefore, when the first power signal is de-energized, the level of the first power signal changes, and the level of the detection control signal also changes accordingly. The power management module stops generating the display power supply signal, and the synchronization control module, based on the detection control signal, controls the transmission path of the second power signal between the main control module and the touch driver module to be disconnected. The second power signal can no longer be supplied to the touch driver module, and without the power support provided by the second power signal, the touch driver module no longer generates the touch driver signal. In this way, the synchronization of the first power signal supplying power to the power management module and the second power signal supplying power to the touch driver module, as well as the synchronization of the disconnection of the first power signal supplying power to the power management module and the disconnection of the second power signal supply to the touch driver module, are achieved, thereby realizing the synchronous power supply and power-off of the display power and the touch power. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0008] Figures 1A-1C This is a schematic diagram of the structure of the display device provided in the embodiments of this application; Figure 2 A timing diagram of the first power signal, the second power signal, and the detection control signal provided in the embodiments of this application; Figure 3 A timing diagram of the first power supply signal and the detection control signal provided for embodiments of this application; Figure 4 A flowchart of a control method for a display device provided in an embodiment of this application.

[0009] The realization of the objectives, functional features and advantages of the embodiments of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0010] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0011] Furthermore, descriptions involving "first," "second," etc., in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0012] It should be noted that the electrical connection referred to in this application can include both direct and indirect connections. Indirect connections can include connections between connected modules, devices, and nodes achieved through electrical components, wired or wireless media, etc. An electrical connection can refer to a physically existing connection or a connection established through signals.

[0013] In designs where the display driver chip and touch driver chip are separate, the timing of the display power supply and touch power supply must be strictly set to ensure that the display and touch functions can work in coordination. However, in some embodiments, the display power supply and touch power supply are output by different control units in the main control module, and the touch unit is also reused as the power supply for other control units in the main control module, making it difficult to control the display power supply and touch power supply to be synchronized.

[0014] Furthermore, since the settings for display power and touch power depend entirely on the motherboard hardware settings and the basic input / output system settings based on different preset scenarios, if some scenarios are omitted when setting the timing, then using the display device in the corresponding unset scenario will cause at least one of the display function and touch function of the display device to malfunction.

[0015] In some scenarios, if the display power fails while the touch power remains on, the touch driver chip may fail to stop outputting touch drive signals in time, causing it to continue operating. This results in the power management chip's output voltage being affected by the touch driver chip's output signal and remaining at an initial potential. When the source driver chip needs to be powered on again, it is highly susceptible to stopping operation due to this initial potential, leading to malfunctions in the display device.

[0016] For example, in some embodiments, the display power supply may briefly power off for a period of time (e.g., 10 milliseconds) and then briefly power on again (e.g., less than 20 milliseconds). Because the power outage time of the display power supply is short, the detection mechanism of the touch driver chip is very prone to confusion, which may cause the touch driver chip to continue to output touch driving signals. As a result, the potential at the output terminal of the power management chip is affected by the output signal of the touch driver chip and is at an initial potential. Consequently, when the source driver chip needs to power on again, the power management chip malfunctions, causing the display device to also malfunction.

[0017] The situation where the power supply to the touch screen fails to follow the power supply of the display in time when it goes out, causing the power management chip to malfunction, can be called a backflow phenomenon.

[0018] Therefore, this application provides a display device and its control method to enable the display power supply and the touch power supply to be powered on and off synchronously, thereby improving the backflow phenomenon.

[0019] Specifically, such as Figures 1A-1C This is a schematic diagram of the structure of the display device provided in the embodiments of this application. Figure 2 This is a timing diagram of the first power signal, the second power signal, and the detection control signal provided in an embodiment of this application. This application provides a display device, including a control circuit 10 and a display panel 20. The control circuit 10 is electrically connected to the display panel 20, and the control circuit 10 is configured to output signals required for the display panel 20 to perform a display. The display panel 20 is configured to perform a display.

[0020] The display panel 20 may include a plurality of sub-pixels SPX, which are used to implement the display function of the display panel 20. The emission color of the plurality of sub-pixels SPX includes, but is not limited to, at least one of red, green, blue or white.

[0021] In some embodiments, the control circuit 10 may also be configured to output signals to the display panel 20 required for enabling the display panel 20 to perform touch functions. Accordingly, the display panel 20 may also include a plurality of touch electrodes (not shown in the figure), which are configured to support the display panel 20 in performing touch functions.

[0022] It should be noted that the touch functionality in this application includes, but is not limited to, touch functionality implemented through mutual capacitance, self-capacitance, or other similar methods. Furthermore, the touch functionality in this application is not limited to touch functionality implemented via built-in or add-on methods.

[0023] It is understood that the display panel 20 of this application includes, but is not limited to, passive display panels, self-emissive display panels, etc. Passive display panels include liquid crystal display panels, etc., while self-emissive display panels use light-emitting devices as sub-pixels (SPX). Light-emitting devices include, but are not limited to, at least one of organic light-emitting diodes (OLEDs), sub-millimeter light-emitting diodes (PMLEDs), and micro LEDs.

[0024] Please continue reading. Figures 1A-1C The control circuit 10 may include a main control module 101. The main control module 101 is electrically connected to multiple hardware devices, and is configured to control data exchange and signal transmission between the multiple hardware devices. These multiple hardware devices may be the hardware components required by the display device to achieve display, touch, and other functions.

[0025] Optionally, the main control module 101 can be a motherboard. The motherboard may include a central processing unit, a graphics processor, memory, and other devices. The devices in the main control module 101 can communicate and cooperate with each other to provide the necessary control signals for the display panel 20 to perform display or touch functions.

[0026] In some embodiments, the main control module 101 is further configured to output a first power signal VCC and a second power signal VT. The first power signal VCC may be a display power signal, and the second power signal VT may be a touch power signal VTSP.

[0027] It should be noted that the first power signal VCC and the second power signal VT can be signals generated by different power supply circuits in the main control module 101; the first power signal VCC and the second power signal VT can also be signals directly supplied to the main control module 101 by an external power supply and transmitted or distributed by the main control module 101.

[0028] Please continue reading. Figures 1A-1C and Figure 2 The control circuit 10 may further include a power management module 102, which is electrically connected to the main control module 101 and the display panel 20. The power management module 102 is configured to receive a first power signal VCC and generate multiple display power supply signals based on the first power signal VCC. Correspondingly, the display panel 20 is configured to control multiple sub-pixels SPX to display the image based on the power provided by the multiple display power supply signals.

[0029] Optionally, the power management module 102 can be a power management chip. The power management module 102 may include at least one of the following: a boost circuit, a buck circuit, a buck-boost circuit, a differential circuit, a voltage regulator circuit, and an amplifier circuit.

[0030] It should be noted that the first power signal VCC can also be called the display main power signal. The display power supply signal is a signal generated by the power management module 102 to provide power to the display panel 20.

[0031] Optionally, the control circuit 10 may further include a timing controller 105, a source driver 106, and a gate driver 107. At least one of the timing controller 105, source driver 106, and gate driver 107 receives a display power supply signal to generate relevant control signals for controlling the display panel 20 to display under the power provided by the display power supply signal. For example, the timing controller 105 communicates with the main control module 101 under the power provided by the display power supply signal and generates image data signals and clock signals based on the original image signals output by the main control module 101. Similarly, the gate driver circuit generates a scan signal based on the clock signal output by the timing controller 105 under the power provided by the display power supply signal. Furthermore, the source driver 106 generates a data signal based on the image data signal output by the timing controller 105 under the power provided by the display power supply signal. The sub-pixels SPX of the display panel 20 display images based on the scan signals and data signals to realize the display function of the display panel 20.

[0032] It should be noted that the gate driver 107 can be designed independently of the display panel 20, or it can be integrated on the display panel 20 in the form of a gate driver (GOA) on the array substrate.

[0033] Please continue reading. Figures 1A-1C and Figure 2 To enable the touch functionality of the display device, the control circuit 10 may further include a touch driving module 103. The touch driving module 103 is electrically connected to the main control module 101 and the display panel 20. The touch driving module 103 is configured to generate a touch driving signal under the influence of electrical energy provided by the second power signal VT. Correspondingly, the display panel 20 is configured to control the touch electrodes to perform touch sensing according to the touch driving signal.

[0034] Optionally, the touch driver module 103 may include at least one of the following devices: a touch driver chip, a touch microprocessor, etc.

[0035] In some embodiments, the touch driving module 103 is electrically connected to the display panel 20 via a timing controller 105 and a source driver 106. The touch electrodes may include driving electrodes and sensing electrodes arranged in a cross configuration. The touch driving signal output by the touch driving module 103 can be output to the driving electrodes after being acted upon by the source driver 106, thereby forming a stable electric field between the driving electrodes and the sensing electrodes. When a finger or other object approaches the display panel 20, the electric field between the sensing electrodes and the driving electrodes is disturbed, causing a change in the capacitance between them. The touch driving module 103 reads and analyzes the capacitance change via a medium such as a sensing line to obtain the touch position of the display panel 20, and then reports the relevant signal of the touch position to the main control module 101, so that the main control module 101 and the timing controller 105 can control the display panel 20 to respond to the touch action. Therefore, the touch action will inversely affect the display function, and the display function and the touch function are closely related.

[0036] Please continue reading. Figures 1A-1C and Figure 2 The power management module 102 is further configured to generate a detection control signal VDET whose level changes follow the level changes of the first power signal VCC. The control circuit 10 may also include a synchronization control module 104, which is electrically connected to the main control module 101, the power management module 102, and the touch driver module 103. The synchronization control module 104 is configured to control the on / off state of the transmission path for transmitting the second power signal VT between the main control module 101 and the touch driver module 103 based on the detection control signal VDET.

[0037] Specifically, when the synchronization control module 104 establishes the transmission path for the second power signal VT between the main control module 101 and the touch driver module 103 according to the detection control signal VDET, the touch driver module 103 can generate a touch driving signal under the power provided by the second power signal VT. When the synchronization control module 104 disconnects the transmission path for the second power signal VT between the main control module 101 and the touch driver module 103 according to the detection control signal VDET, the second power signal VT is no longer provided to the touch driver module 103, and therefore, the touch driver module 103 has no power available to support the generation of the touch driving signal.

[0038] Because the level change of the detection control signal VDET follows the level change of the first power signal VCC, the first power signal VCC supplies power to the power management module 102. When the power management module 102 generates multiple display power supply signals according to the first power signal VCC, the synchronization control module 104, under the control of the detection control signal VDET, also controls the connection of the transmission path of the second power signal VT between the main control module 101 and the touch driver module 103. When the first power signal VCC is de-energized, the level change of the first power signal VCC causes the level of the detection control signal VDET to change accordingly. The power management module 102 stops generating display power supply signals, and the synchronization control module 104, under the control of the detection control signal VDET, also controls the disconnection of the transmission path of the second power signal VT between the main control module 101 and the touch driver module 103. The second power signal VT can no longer be supplied to the touch driver module 103. Without the power provided by the second power signal VT, the touch driver module 103 no longer generates touch driver signals. In this way, the power supply from the first power signal VCC to the power management module 102 and the power supply from the second power signal VT to the touch driver module 103 are synchronized, as are the disconnections from the power supply from the first power signal VCC to the power management module 102 and the disconnections from the power supply from the second power signal VT to the touch driver module 103. This achieves synchronized power supply and power cut-off of the display power supply and the touch power supply, which helps to improve the backflow phenomenon.

[0039] It should be noted that "power failure" as referred to in this application can mean that the voltage of the signal decreases from a voltage value greater than a preset value to a preset value. The preset value can be 0V. The level change of the detection control signal VDET following the level change of the first power signal VCC means that when the first power signal VCC changes from a low level to a high level, the detection control signal VDET also changes from a low level to a high level accordingly. Similarly, when the first power signal VCC changes from a high level to a low level, the detection control signal VDET also changes from a high level to a low level accordingly. Whether the voltage value of the detection control signal VDET follows the voltage value change of the first power signal VCC is not limited in this application; those skilled in the art can choose and set it according to actual needs. When the touch driver module 103 no longer generates touch driver signals, the touch driver module 103 can enter standby mode to save power consumption.

[0040] In some embodiments, when the first power signal VCC is high, the power management chip is configured to generate multiple display power supply signals based on the first power signal VCC. Correspondingly, the synchronization control module 104 provides the second power signal VT to the touch driver module 103 based on the high level of the detection control signal VDET, so that the touch driver module 103 generates touch drive signals under the power supplied by the second power signal VT. When the first power signal VCC is low, the power management chip no longer generates multiple display power supply signals based on the first power signal VCC. Correspondingly, the synchronization control module 104 stops supplying the second power signal VT to the touch driver module 103 based on the low level of the detection control signal VDET, thereby causing the touch driver module 103 to stop outputting touch drive signals.

[0041] In some embodiments, the touch driver module 103 requires different power supplies for communication and generating touch driver signals. Therefore, the second power signal VT can include the touch power signal VTSP and the touch interface power signal VDDIOM, such as... Figures 1B-1C and Figure 2 As shown. The touch power signal VTSP provides power to the touch driver module 103 for generating touch drive signals. The touch interface power signal VDDIOM provides power to the communication interface in the touch driver module 103 that communicates with the main control module 101. By making the second power signal VT include the touch interface power signal VDDIOM and the touch power signal VTSP, different power supplies can be provided for the communication of the touch driver module 103 and the generation of touch drive signals. Furthermore, signal isolation can be achieved between the power signal that provides power for generating touch drive signals and the power signal that provides power for communication of the touch driver module 103, thereby reducing the impact of high-frequency noise caused by high-speed signal switching on the communication bus connected to the interface of the touch driver module 103 on the touch power signal VTSP, which is beneficial to improving the quality of the touch drive signals generated by the touch driver module 103. Moreover, it is also beneficial to ensure the integrity and reliability of communication between the touch driver module 103 and the main control module 101.

[0042] It should be noted that the touch power signal VTSP is the main power supply for the touch driver module 103. The touch power signal VTSP can supply power to at least one of the amplifier circuit, filter circuit, analog-to-digital converter, and other circuits within the touch driver module 103. The touch interface power signal VDDIOM can also be referred to as the touch driver module interface power signal.

[0043] Optionally, the voltage value of the touch power signal VTSP can be greater than the voltage value of the touch interface power signal VDDIOM. For example, in some embodiments, the voltage value of the touch power signal VTSP is 3.3V, and the voltage value of the touch interface power signal VDDIOM is 1.8V.

[0044] In some embodiments, to reduce the probability of uncontrollable output from the communication interface of the touch driver module 103, the touch driver module 103 may receive the touch power signal VTSP earlier than the touch interface power signal VDDIOM. Correspondingly, the synchronization control module 104 is configured to control the touch driver module 103 to receive the touch power signal VTSP earlier than the touch interface power signal VDDIOM based on the detection control signal VDET. This allows the touch driver module 103 to use the power provided by the touch power signal VTSP to first place its communication interface in a safe default state before providing the touch interface power signal VDDIOM to the touch driver module 103. This reduces the likelihood of communication bus conflicts caused by erroneous output from the communication interface of the touch driver module 103, thereby affecting communication between the main control module 101 and other devices.

[0045] Optionally, the detection control signal VDET includes a first sub-detection control signal VDET1 and a second sub-detection control signal VDET2. The start time of the effective pulse of the first sub-detection control signal VDET1 is equal to or later than the start time of the effective pulse of the first power signal VCC, and earlier than the start time of the effective pulse of the second sub-detection control signal VDET2; the end time of the effective pulse of the first sub-detection control signal VDET1 is equal to the end time of the effective pulse of the first power signal VCC, and equal to the end time of the effective pulse of the second sub-detection control signal VDET2, such as... Figure 2 As shown. The synchronization control module 104 is configured to control the duration for which the touch driver module 103 receives the touch power signal VTSP according to the first sub-detection control signal VDET1, and to control the duration for which the touch driver module 103 receives the touch interface power signal VDDIOM according to the second sub-detection control signal VDET2, so that the duration for which the touch driver module 103 receives the touch power signal VTSP is independent of the duration for which it receives the touch interface power signal VDDIOM.

[0046] In practical applications, since signal level transitions require a certain transition time, to reduce the probability of erroneous output from the communication interface of the touch driver module 103, the second sub-detection control signal VDET2 can transition from an invalid level to an effective level 90% of the time after the first sub-detection control signal VDET1 changes from an invalid level to an effective level. Taking an effective level as high and an invalid level as low as an example, there is a transition period between the first sub-detection control signal VDET1 changing from a low level to a high level. From the start of this transition period to 90% of the time, the second sub-detection control signal VDET2 still does not have a low-to-high level transition. Only after 90% of the time has elapsed does the second sub-detection control signal VDET2 begin to have a low-to-high level transition. In this way, the touch driver module 103 can use the power provided by the touch power signal VTSP to first put the communication interface of the touch driver module 103 into a stable and safe default state, and then provide the touch interface power signal VDDIOM to the touch driver module 103, which helps to further reduce the erroneous output of the communication interface of the touch driver module 103. It should be understood that the power management module 102 may include a delay unit. This delay unit can be configured to delay the start time of the effective pulse of the first sub-detection control signal VDET1 after the start time of the effective pulse of the first power signal VCC, and / or delay the start time of the effective pulse of the second sub-detection control signal VDET2 after the start time of the effective pulse of the first sub-detection control signal VDET1. Since the delay unit has many implementation forms, this application does not specifically limit the design of the delay unit. Those skilled in the art can refer to related technologies to obtain the design of the delay unit, which will not be elaborated here. It should be noted that in some embodiments, the delay unit may also be set independently of the power management module 102.

[0047] like Figure 3 A timing diagram of the first power supply signal and the detection control signal provided in the embodiments of this application. In some embodiments, a certain moment in the transition period of the first power supply signal VCC from an invalid level to an active level can be used as the delay start point (e.g., Figure 3 (at tA in the delay), the effective pulse start time of the first sub-detection control signal VDET1 and / or the second sub-detection control signal VDET2 is obtained by delaying for a specific duration from the delay start point.

[0048] Please continue reading. Figures 1B-1C and Figure 2The main control module 101 may include a second output terminal for outputting a touch power signal VTSP and a touch interface power signal VDDIOM. The touch driver module 103 may include a first interface terminal for receiving the touch power signal VTSP and a second interface terminal for receiving the touch interface power signal VDDIOM. The first output terminal of the main control module 101 and the first interface terminal of the touch driver module 103, and the second output terminal of the main control module 101 and the second interface terminal of the touch driver module 103 are electrically connected through the synchronization control module 104. The synchronization control module 104 is configured to control the on / off state of the transmission path of the touch power signal VTSP between the first output terminal of the main control module 101 and the first interface terminal of the touch driver module 103, and is configured to control the on / off state of the transmission path of the touch interface power signal VDDIOM between the second output terminal of the main control module 101 and the second interface terminal of the touch driver module 103, so that the touch power signal VTSP and the touch interface power signal VDDIOM received by the touch driver module 103 are independent of each other by utilizing the first output terminal, the second output terminal, the first interface terminal and the second interface terminal.

[0049] in, Figure 2 VTSP_1 corresponds to the timing of the touch power signal VTSP displayed on the first interface terminal, and VDDIOM_1 corresponds to the timing of the touch power signal VTSP displayed on the second interface terminal.

[0050] In some embodiments, the synchronization control module 104 is configured to control the time period during which the first interface terminal of the touch driver module 103 receives the touch power signal VTSP according to the first sub-detection control signal VDET1, and to control the time period during which the second interface terminal of the touch driver module 103 receives the touch interface power signal VDDIOM according to the second sub-detection control signal VDET2, so as to realize independent transmission control of the touch power signal VTSP and the touch interface power signal VDDIOM by utilizing the first sub-detection control signal VDET1, the second sub-detection control signal VDET2, the first interface terminal, and the second interface terminal, thereby reducing the mutual influence between the touch power signal VTSP and the touch interface power signal VDDIOM.

[0051] Please continue reading. Figures 1B-1CThe synchronization control module 104 may include a first control unit 1041 and a second control unit 1042. The first control unit 1041 is electrically connected between the first output terminal of the main control module 101 and the first interface terminal of the touch driver module 103. The first control unit 1041 is configured to control the electrical connection between the first interface terminal of the touch driver module 103 and the first output terminal of the main control module 101 according to a first sub-detection control signal VDET1. The second control unit 1042 is electrically connected between the second output terminal of the main control module 101 and the second interface terminal of the touch driver module 103. The second control unit 1042 is configured to control the electrical connection between the second interface terminal of the touch driver module 103 and the second output terminal of the main control module 101 according to a second sub-detection control signal VDET2. By including a first control unit 1041 and a second control unit 1042 in the synchronization control module 104, independent transmission control of the touch power signal VTSP and the touch interface power signal VDDIOM can be achieved, reducing the mutual influence between the touch power signal VTSP and the touch interface power signal VDDIOM.

[0052] Please continue reading. Figure 1C The first control unit 1041 may include a first transistor T1, and the second control unit 1042 may include a second transistor T2.

[0053] The control terminal of the first transistor T1 is configured to receive the first sub-detection control signal VDET1. The first source-drain terminal of the first transistor T1 is electrically connected to the first output terminal of the main control module 101, and the second source-drain terminal of the first transistor T1 is electrically connected to the first interface terminal of the touch driver module 103, so that the first transistor T1 connects or disconnects the transmission path of the touch power signal VTSP between the touch driver module 103 and the main control module 101 under the control of the first sub-detection control signal VDET1.

[0054] The control terminal of the second transistor T2 is configured to receive the second sub-detection control signal VDET2. The first source-drain terminal of the second transistor T2 is electrically connected to the second output terminal of the main control module 101, and the second source-drain terminal of the second transistor T2 is electrically connected to the second interface terminal of the touch driver module 103, so that the second transistor T2 connects or disconnects the transmission path of the touch power signal VTSP between the touch driver module 103 and the main control module 101 under the control of the second sub-detection control signal VDET2.

[0055] Optionally, the first transistor T1 and the second transistor T2 can be devices such as metal-oxide-semiconductor field-effect transistors (MOSFETs), transistors, or thin-film transistors (TFTs). Because TFTs have large threshold voltage fluctuations and poor stability, they are not suitable for precision logic control designs. Transistors, on the other hand, have large voltage drops, which significantly affect power supply accuracy. Therefore, the first transistor T1 and the second transistor T2 of this application can be metal-oxide-semiconductor field-effect transistors.

[0056] Optionally, the first transistor T1 and the second transistor T2 can be N-type transistors or P-type transistors.

[0057] In some embodiments, a high level for the first power signal VCC corresponds to the first power signal VCC supplying power to the power management module 102, and a low level for the first power signal VCC corresponds to the first power signal VCC being powered down. During the period when the detection control signal VDET is at a high level, the second power signal VT should be provided to the touch driver module 103; during the period when the detection control signal VDET is at a low level, the second power signal VT should not be provided to the touch driver module 103. Therefore, the first transistor T1 and the second transistor T2 can be N-type transistors, so that when the first power signal VCC is at a high level, the first transistor T1 can be turned on according to the first sub-detection control signal VDET1 to connect the transmission path of the touch power signal VTSP between the main control module 101 and the touch driver module 103; and the second transistor T2 can be turned on according to the second sub-detection control signal VDET2 to connect the transmission path of the touch interface power signal VDDIOM between the main control module 101 and the touch driver module 103. This reduces the difficulty of controlling the second power signal VT to the touch driver module 103 and saves costs.

[0058] In some embodiments, the first transistor T1 and the second transistor T2 may also be P-type transistors. Correspondingly, when the first power signal VCC is high, it indicates that the first power signal VCC provides power to the power management module 102; when the first power signal VCC is low, it indicates that the first power signal VCC is powered off. The display device may also include an inverting module, which is electrically connected between the power management module 102 and the first control unit 1041 and the second control unit 1042. The inverting module is configured to invert the phase of the first sub-detection control signal VDET1 and output it to the first control unit 1041, and to invert the phase of the second sub-detection control signal VDET2 and output it to the second control unit 1042, so that the first transistor T1 and the second transistor T2, under the control of the inverted first sub-detection control signal VDET1 and the second sub-detection control signal VDET2, synchronize the power supply and power-off of the first power signal VCC and the second power signal VT.

[0059] It should be noted that the high level of the first power signal VCC, corresponding to the first power signal VCC supplying power to the power management module 102, and the low level of the first power signal VCC, corresponding to the first power signal VCC being de-energized, only correspond to one scenario involved in actual applications. The scenario where the first power signal VCC is low, corresponding to the first power signal VCC supplying power to the power management module 102, and high, corresponding to the first power signal VCC being de-energized, is not excluded by this application. Therefore, those skilled in the art can selectively configure the inverting module according to the actual situation and the types of the first transistor T1 and the second transistor T2.

[0060] In some embodiments of related designs, when the first power signal VCC and the touch interface power signal VDDIOM are powered off, the touch power signal VTSP remains powered on, causing the touch driver module 103 to malfunction, which in turn leads to abnormalities in the display and touch operation of the display device. However, this application utilizes a synchronization control module 104 to achieve synchronous control of the touch driver module 103 receiving the touch power signal VTSP and the touch interface power signal VDDIOM, thereby ensuring that the touch power signal VTSP and the touch interface power signal VDDIOM are powered off synchronously. Therefore, the display device of this application can improve the problem caused by the first power signal VCC and the touch interface power signal VDDIOM being powered off while the touch power signal VTSP remains powered on.

[0061] In some embodiments, the synchronization control module 104 can also be implemented in the form of a load switch driver chip, so that when the first power signal VCC and the second power signal VT are powered on or off synchronously, overcurrent protection, overvoltage protection and other settings can also be implemented through the load switch driver chip.

[0062] Please continue reading. Figures 1A-1C and Figure 2 The touch driver module 103 can also directly adjust the state of the touch driver signal output by the touch driver module 103 according to the level state of the detection control signal VDET, so as to provide redundancy guarantee for the synchronous power supply and power failure of the first power signal VCC and the second power signal VT.

[0063] For example, if a high level for the first power signal VCC indicates that VCC is supplying power to the power management module 102, and a low level for VCC indicates that VCC is powered down, then when VCC is high, the detection control signal VDET is also high. The touch driver module 103 detects this high level and maintains the output of the touch driver signal. When VCC is low, the detection control signal VDET is low, and the touch driver module 103 stops outputting the touch driver signal.

[0064] In some embodiments, the touch driving module 103 is configured to detect the level state of at least one of the first sub-detection control signal VDET1 and the second sub-detection control signal VDET2 in order to control the state of the touch driving signal output by the touch driving module 103, thereby enabling the display device provided in this application to be applicable to more scenarios.

[0065] It should be understood that the display devices of this application include, but are not limited to, devices used in mobile devices, video phones, smartwatches, watch phones, wearable devices, foldable devices, rollable devices, bendable devices, flexible devices, bending devices, sliding devices, variable devices, electronic notebooks, e-books, portable multimedia players, personal digital assistants, MP3 players, mobile medical devices, desktop personal computers (PCs), laptop PCs, netbooks, workstations, navigation devices, car navigation devices, car display devices, automotive equipment, theater equipment, theater display devices, TVs, wallpaper display devices, signage devices, game consoles, laptops, monitors, cameras, camcorders, and home appliances.

[0066] like Figure 4 A flowchart illustrating a control method for a display device provided in an embodiment of this application. This application also provides a control method for a display device, applicable to any of the aforementioned display devices.

[0067] The control methods for the display device include: Step S10: Receive the first power signal VCC, and generate a detection control signal VDET whose level changes follow the level changes of the first power signal VCC. Step S20: Connect or disconnect the transmission path of the second power signal VT between the main control module 101 and the touch driver module 103 according to the detection control signal VDET.

[0068] Specifically, the main control module 101 can output a first power signal VCC, the power management module 102 can generate a detection control signal VDET, and the transmission path of the second power signal VT between the main control module 101 and the touch drive module 103 can be connected or disconnected according to the detection control signal VDET.

[0069] Optionally, the control method for the display device may further include: generating multiple display power supply signals based on the first power supply signal VCC; and displaying based on the electrical energy provided by the display power supply signals. The display power supply signals can be generated by the power management module 102 and displayed through multiple sub-pixels SPX in the display panel 20.

[0070] Optionally, the control method of the display device may further include: generating a touch drive signal based on the electrical energy provided by the second power signal VT; and performing touch sensing based on the touch drive signal. The touch drive signal can be generated by the touch drive module 103 and received by the touch electrodes in the display panel 20 for touch sensing.

[0071] Optionally, the second power signal VT includes a touch power signal VTSP and a touch interface power signal VDDIOM. The detection control signal VDET includes a first sub-detection control signal VDET1 and a second sub-detection control signal VDET2. Accordingly, the step of connecting or disconnecting the transmission path of the second power signal VT between the main control module 101 and the touch driver module 103 according to the detection control signal VDET may include: The first sub-detection control signal VDET1 connects or disconnects the transmission path of the touch power signal VTSP between the main control module 101 and the touch driver module 103; and The second sub-detection control signal VDET2 connects or disconnects the transmission path of the touch interface power signal VDDIOM between the main control module 101 and the touch driver module 103.

[0072] The synchronous control module 104 can control the on / off state of the transmission path of the touch power signal VTSP and the touch interface power signal VDDIOM between the main control module 101 and the touch driver module 103.

[0073] In some embodiments, the first control unit 1041 can control the on / off state of the transmission path for transmitting the touch power signal VTSP between the main control module 101 and the touch driver module 103, and the second control unit 1042 can control the on / off state of the transmission path for transmitting the touch interface power signal VDDIOM between the main control module 101 and the touch driver module 103.

[0074] The control method for the display device provided in this application is applicable to any of the above-mentioned display devices. Therefore, the control method for the display device in this application has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described in detail here.

[0075] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A display device, characterized in that, include: The main control module is configured to output a first power signal and a second power signal; The power management module is electrically connected to the main control module and is configured to generate multiple display power supply signals and a detection control signal whose level changes follow the level changes of the first power signal based on the first power signal. The touch driving module is electrically connected to the main control module and the power management module, and is configured to generate a touch driving signal under the action of electrical energy provided by the second power signal; The display panel, electrically connected to the power management module and the touch driving module, includes multiple sub-pixels and multiple touch electrodes, and is configured to control the multiple sub-pixels to display an image based on the power supplied by the display power supply signal, and to control the touch electrodes to perform touch sensing based on the touch driving signal. as well as The synchronization control module, electrically connected to the main control module, the power management module and the touch driver module, is configured to control the on / off state of the transmission path for transmitting the second power signal between the main control module and the touch driver module according to the detection control signal.

2. The display device according to claim 1, characterized in that, The second power signal includes: The touch power signal is used to provide power for the touch driver module to generate the touch driver signal; The touch interface power signal is used to provide power to the communication interface in the touch driver module that communicates with the main control module; The synchronization control module is configured to control the touch driver module to receive the touch power signal earlier than the time it receives the touch interface power signal, based on the detection control signal.

3. The display device according to claim 2, characterized in that, The synchronization control module is configured to control the on / off state of the transmission path for transmitting the touch power signal between the first output terminal of the main control module and the first interface terminal of the touch driver module, and the on / off state of the transmission path for transmitting the touch interface power signal between the second output terminal of the main control module and the second interface terminal of the touch driver module.

4. The display device according to claim 3, characterized in that, The detection control signal includes a first sub-detection control signal and a second sub-detection control signal; the start time of the effective pulse of the first sub-detection control signal is equal to or later than the start time of the effective pulse of the first power signal, and earlier than the start time of the effective pulse of the second sub-detection control signal; the end time of the effective pulse of the first sub-detection control signal is equal to the end time of the effective pulse of the first power signal, and equal to the end time of the effective pulse of the second sub-detection control signal. The synchronization control module is configured to control the time period during which the first interface terminal of the touch driver module receives the touch power signal according to the first sub-detection control signal, and to control the time period during which the second interface terminal of the touch driver module receives the touch interface power signal according to the second sub-detection control signal.

5. The display device according to claim 4, characterized in that, The synchronization control module includes: A first control unit, electrically connected between the first output terminal of the main control module and the first interface terminal of the touch driver module, is configured to control the electrical connection between the first interface terminal of the touch driver module and the first output terminal of the main control module according to the first sub-detection control signal; and The second control unit is electrically connected between the second output terminal of the main control module and the second interface terminal of the touch driver module, and is configured to control the electrical connection between the second interface terminal of the touch driver module and the second output terminal of the main control module according to the second sub-detection control signal.

6. The display device according to claim 5, characterized in that, The first control unit includes a first transistor, the control terminal of the first transistor is configured to receive the first sub-detection control signal, the first source-drain terminal of the first transistor is electrically connected to the first output terminal of the main control module, and the second source-drain terminal of the first transistor is electrically connected to the first interface terminal of the touch driving module. The second control unit includes a second transistor, the control terminal of the second transistor is configured to receive the second sub-detection control signal, the first source-drain terminal of the second transistor is electrically connected to the second output terminal of the main control module, and the second source-drain terminal of the second transistor is electrically connected to the second interface terminal of the touch driver module.

7. The display device according to claim 6, characterized in that, The first transistor and the second transistor are P-type transistors; The display device further includes: The inverting module is electrically connected between the power management module and the first control unit and the second control unit, and is configured to invert the phase of the first sub-detection control signal and output it to the first control unit, and to invert the phase of the second sub-detection control signal and output it to the second control unit.

8. The display device according to claim 4, characterized in that, The touch driving module is also configured to detect the level state of at least one of the first sub-detection control signal and the second sub-detection control signal in order to control the state of the touch driving signal.

9. A control method for a display device, characterized in that, The control method, applied to the display device as described in any one of claims 1 to 8, comprises: Receive the first power signal and generate a detection control signal whose level changes follow the level changes of the first power signal; The detection control signal connects or disconnects the transmission path of the second power signal between the main control module and the touch driver module.

10. The control method according to claim 9, characterized in that, The second power signal includes a touch power signal and a touch interface power signal; The detection control signal includes a first sub-detection control signal and a second sub-detection control signal. The start time of the effective pulse of the first sub-detection control signal is equal to or later than the start time of the effective pulse of the first power signal, and earlier than the start time of the effective pulse of the second sub-detection control signal. The end time of the effective pulse of the first sub-detection control signal is equal to the end time of the effective pulse of the first power signal, and equal to the end time of the effective pulse of the second sub-detection control signal. The step of connecting or disconnecting the transmission path for transmitting the second power signal between the main control module and the touch driver module based on the detection control signal includes: The transmission path for transmitting the touch power signal between the main control module and the touch driver module is connected or disconnected according to the first sub-detection control signal; and The second sub-detection control signal connects or disconnects the transmission path for transmitting the touch interface power signal between the main control module and the touch driver module.

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