Signal control method, signal control device and screen

Abstract

The invention provides a signal control method, a signal control device and a screen, and relates to the technical field of display, the signal control method is applied to the screen, the screen comprises a first IC and a second IC, the method comprises the following steps: responding to a power-off instruction signal, sending a first control signal to a GOA, sending a second control signal to the first IC, and sending a third control signal to the second IC, the power-off instruction signal is used for instructing a screen to be powered off, the first control signal is used for controlling a control electrode of a transistor in the GOA to be turned on in a first time period, the second control signal is used for controlling the first IC to be powered off at a first moment, and the third control signal is used for controlling the second IC to be powered off at a second moment; the termination moment of the first time period is different from the time sequence of the first moment and / or the second moment. Based on the method, the phenomenon of screen splitting during startup of the screen can be solved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and more specifically, to a signal control method, a signal control device and a screen. Background Art

[0002] In order to meet users' growing demand for high-resolution screen displays, a dual integrated circuit (IC) architecture is currently widely used in the market to increase the resolution of the screen, that is, an architecture composed of a master IC and a slave IC, wherein the master IC corresponds to half of the display panel, and the slave IC corresponds to the other half of the display panel. Due to the independence of signal control between the master and slave ICs, the signals between the master and slave ICs are coupled and influence each other, resulting in a split screen phenomenon (i.e., an obvious dividing line in the middle of the screen) when the screen is powered on again after being powered off normally, thereby reducing the user's visual experience. Summary of the invention

[0003] The present application provides a signal control method, a signal control device and a screen, which can solve the problem of screen splitting when the screen is turned on.

[0004] In a first aspect, a signal control method is provided, which is applied to a screen, wherein the screen includes a first IC and a second IC, and the method includes: in response to a power-off command signal, sending a first control signal to a gate driver on array (GOA), sending a second control signal to the first IC, and sending a third control signal to the second IC, wherein the power-off command signal is used to instruct the screen to power off, the first control signal is used to control the control electrode of the transistor in the GOA to open within a first time period, the second control signal is used to control the first IC to power off at a first moment, and the third control signal is used to control the second IC to power off at a second moment, and the end moment of the first time period is different from the timing of the first moment and / or the second moment.

[0005] In combination with the first aspect, in certain implementations of the first aspect, the end time of the above-mentioned first time period is before the first moment and the second moment, or the end time of the first time period is after the first moment and the second moment, or the end time of the first time period is before the first moment and after the second moment, or the end time of the first time period is before the second moment and after the first moment.

[0006] In combination with the first aspect, in certain implementations of the first aspect, when the end time of the first time period is before the first time and the second time, and the timing of the first time and the second time is the same, a fourth control signal is sent to GOA, and the fourth control signal is used to adjust the voltage of GOA to a target voltage at the end time, and the target voltage is a negative voltage.

[0007] In combination with the first aspect, in certain implementations of the first aspect, the target voltage is equal to a low gate voltage of the first IC or the second IC, and the low gate voltage is used to control the control electrode of the transistor in the above-mentioned GOA to be turned off.

[0008] In combination with the first aspect, in some implementations of the first aspect, a fifth control signal is sent to the GOA, where the fifth control signal is used to adjust the voltage of the GOA to the ground voltage at the first moment or the second moment.

[0009] In combination with the first aspect, in some implementations of the first aspect, the screen is an oxide screen.

[0010] In a second aspect, a signal control method is provided, which is applied to a screen, wherein the screen includes a first IC and a second IC, a high voltage output (voltage gate high output, VGHO) module of the first IC and a low voltage output (voltage gate low output, VGLO) module of the second IC, wherein the VGHO module is used to output a high gate voltage, which is used to control the control electrode of the transistor in the GOA to turn on, and the VGLO module is used to output a low gate voltage, which is used to control the control electrode of the transistor in the GOA to turn off. Before the screen is powered off, the high gate voltage is a high level and the low gate voltage is a low level. In response to a power-off instruction signal, a first control signal is sent to the GOA, a second control signal is sent to the first IC, and a third control signal is sent to the second IC, wherein the power-off instruction signal is used to instruct the screen to power off, the first control signal is used to turn on the control electrode of the transistor in the GOA, the second control signal is used to control the first IC to power off, and the absolute value of the falling edge slope of the first voltage signal is controlled to be less than or equal to the slope threshold, and the third control signal is used to control the second IC to power off, and the rising edge slope of the low gate voltage is controlled to be less than or equal to the slope threshold.

[0011] In a third aspect, a signal control device is provided, comprising a processor and a memory, wherein the processor and the memory are connected, wherein the memory is used to store program code, and the processor is used to call the program code to execute a method in any possible implementation of the method design of the first aspect or the second aspect above.

[0012] In a fourth aspect, a screen is provided, comprising: a display panel, and a plurality of adjacently arranged ICs, wherein the ICs are connected to the display panel via a power cable, wherein the ICs comprise a VGHO module, a VGLO module, and a ground line, wherein the power cable comprises a first power signal line and a second power signal line, wherein the first power signal line is located on a first side of the power cable, and the second power signal line is located on a second side of the power cable, wherein the distances between the first power signal line and the ground line, the VGHO module, and the VGLO module are respectively greater than or equal to a distance threshold, and the distances between the second power signal line and the ground line, the VGHO module, and the VGLO module are respectively greater than or equal to a distance threshold.

[0013] In a fifth aspect, a screen is provided, comprising the signal control device as described in the third aspect above.

[0014] In a sixth aspect, a computer-readable storage medium is provided, storing a computer program, wherein the computer program is executed by a processor to implement a method in any possible implementation manner in the method design of the first aspect or the second aspect.

[0015] In a seventh aspect, a computer program product is provided, comprising instructions, which, when executed by a processor, enable a computer to execute a method in any possible implementation of the method design of the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a screen circuit diagram based on a dual IC architecture at this stage;

[0017] Figure 2 It is a schematic diagram of the circuit structure of a high voltage output module and a low voltage output module in an IC;

[0018] Figure 3 It is a timing diagram of the master and slave IC related signals when the screen is powered off;

[0019] Figure 4 is a flow chart of a signal control method 400 proposed in an embodiment of the present application;

[0020] Figure 5 It is a timing diagram for controlling multiple signals based on timing relationship 1 proposed in an embodiment of the present application;

[0021] Figure 6 It is a timing diagram for controlling multiple signals based on timing relationship 2 proposed in an embodiment of the present application;

[0022] Figure 7 It is a timing diagram for controlling multiple signals based on timing relationship 3 proposed in an embodiment of the present application;

[0023] Figure 8It is a timing diagram for controlling multiple signals based on the timing relationship 4 proposed in an embodiment of the present application;

[0024] Fig. 9 It is a timing diagram for controlling multiple signals based on the timing relationship 5 proposed in an embodiment of the present application;

[0025] Fig.10 is a timing diagram for controlling multiple signals based on timing relationship 6 proposed in an embodiment of the present application;

[0026] Fig.11 It is a timing diagram for controlling multiple signals based on timing relationship 6 for an oxide screen proposed in an embodiment of the present application;

[0027] Fig.12 is a flowchart of another signal control method 1200 proposed in an embodiment of the present application;

[0028] Fig.13 It is a timing diagram of controlling multiple signals when the screen is powered off, as proposed in an embodiment of the present application;

[0029] Fig.14 is a circuit architecture diagram of a screen 1400 proposed in an embodiment of the present application;

[0030] Fig.15 It is a schematic diagram of a signal control device 1500 proposed in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0032] The embodiments of the present application will present various aspects, embodiments or features around a system including multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all devices, components, modules, etc. discussed in conjunction with the figures. In addition, combinations of these schemes may also be used.

[0033] In addition, in the embodiments of the present application, words such as "exemplary" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0034] The business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field can know that with the evolution of technology and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0035] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0036] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can be represented by: including the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0037] Due to the current market demand for high-resolution display technology for screens (or display screens, displays, etc.), it is difficult for a single IC to control the entire display panel to meet the high-resolution display requirements. Therefore, a dual-IC architecture is commonly used, that is, a combination of a master IC and a slave IC. The two ICs can work together through a pre-set communication protocol to jointly realize the display function and touch function of the screen.

[0038] Figure 1 This is a screen circuit diagram based on a dual IC architecture at this stage.

[0039] refer to Figure 1As shown in the figure, during the screen manufacturing process, the master IC is usually bonded to the left side of the screen (or display panel) to control the display and touch functions of the left half of the screen; the slave IC is usually bonded to the right side of the screen to control the display and touch functions of the right half of the screen. The master and slave ICs can include a high voltage output module (voltage gate high output, VGHO), a low voltage output module (voltage gate low output, VGLO) and a GOA ( Figure 1 Not shown in the figure), used to realize the display and touch functions of the corresponding part of the screen. Based on this circuit layout, it can be ensured that both the left and right halves of the screen can be effectively controlled.

[0040] However, the above dual IC architecture also has corresponding risks. Since the master IC and the slave IC are relatively independent in signal processing, if there is a difference in the output signal between the two, for example, the output of the GOA signal or the power signal is inconsistent, it will cause a significant difference in the display of the left and right halves of the screen. This difference can be called the split screen phenomenon of the screen display. This split screen phenomenon will not only affect the overall display effect of the screen, but also further reduce the customer's experience. Therefore, during the design and manufacturing process, it is necessary to strictly control the output signals of the master IC and the slave IC to ensure the consistency of the signals between the two to avoid poor screen functions.

[0041] The split screen phenomenon is particularly obvious when the screen is powered on (turned on) again after being normally turned off. The following uses this scenario as an example to explain the relationship between the split screen phenomenon and the voltage change when the power is turned off and on again.

[0042] Taking a red, green, blue (RGB) screen with a resolution of 1600×2560 as an example, the master and slave ICs are connected to the corresponding parts of the screen through power cables. Since a row of pixels on the screen at this resolution corresponds to 4800 (i.e., 1600×3) sub-pixels, the power cable of an IC can include 2400 power signal lines (denoted as S1 to S2400) for transmitting voltage signals from the power supply.

[0043] When the screen is powered off, the VGHO and VGLO voltages of the IC return to the ground (GND) voltage (or ground line voltage). Since the VGHO module and the ground line corresponding to the VGHO module are closer to S2400 in the IC, and the VGLO module and the ground line corresponding to the VGLO module are closer to S1 in the IC, there is a coupling effect between signals at close distances. Therefore, the VGHO module has a strong pulling effect on the S2400 of the IC and the VGLO module has a strong pulling effect on the S1 of the IC, that is, when the VGHO voltage returns to the GND voltage from a high voltage, the S2400 of the IC is pulled upward; when the VGLO voltage returns to GND from a low voltage, the S1 of the IC is pulled downward.

[0044] In this architecture, since the master IC's S2400 and the slave IC's S1 are located in the middle of the entire screen, there is an obvious difference between the master IC's power supply voltage and the slave IC's power supply voltage at this location. This difference is reflected in the left-right split screen phenomenon in the display effect. The reasons are as follows:

[0045] Figure 2 The present invention is a circuit structure diagram of a high voltage output module and a low voltage output module in an IC.

[0046] When the screen is working normally, VGHO of the master IC is turned on and VGLO of the slave IC is turned on.

[0047] refer to Figure 2 As shown, when the screen is powered off, the high voltage regulator (HVREG) will be turned off, thereby pulling the capacitor voltage of the VGHO module and the capacitor voltage in the VGLO module to the GND voltage, thereby causing a ground bounce phenomenon. In this case, the capacitor in the VGHO module transitions from a high voltage to a low voltage, and during this process, charges are injected into the GND, causing the signal transmitted by the S2400 of the master IC to be coupled upward, i.e., pulled upward; correspondingly, the capacitor in the VGLO module transitions from a low voltage to a high voltage, and during this process, charges are extracted from the GND, causing the signal transmitted by the S1 of the slave IC to be coupled downward, i.e., pulled downward, resulting in a large difference in the signal potential in the S2400 of the master IC and the signal potential in the S1 of the adjacent slave IC.

[0048] Figure 3 It is a timing diagram of the master and slave IC related signals when the screen is powered off.

[0049] For the oxide screen, when the screen is powered off, it is necessary to first control the control electrodes of the transistors in GOA to be opened for a period of time to release the charge stored in GOA, so as to prevent the screen from flickering due to incomplete electrostatic discharge. After being opened for a period of time, the control electrode of GOA is closed, and the control of the relevant signals for completing the power-off of the screen is completed, including the control of the following signals: controlling the power-off of the master and slave ICs, that is, the VGHO module voltage in the IC is restored from a high voltage to a GND voltage, and the VGLO module voltage is restored from a low voltage to a GND voltage, and the signal potential in S2400 of the master IC is pulled upward, and continues to decrease for a period of time, and finally returns to the potential before being pulled. Correspondingly, the signal potential in S1 of the slave IC is pulled downward, and continues to decrease for a period of time, and finally returns to the potential before being pulled.

[0050] It should be understood that the control electrode of the transistor in the above GOA may refer to the gate of the transistor.

[0051] The moment of opening the control electrode of the transistor in GOA corresponds to Figure 3 The rising edge of the GOA signal in the middle corresponds to the moment when the control electrode of the transistor in the GOA is closed. Figure 3 The falling edge of the GOA signal in the middle; the main IC power-off time corresponds to Figure 3 The falling edge of the VGHO module signal in the middle, at which the signal potential of the S2400 of the master IC is pulled up, and the moment when the slave IC is powered off corresponds to Figure 3 At the moment of the rising edge of the VGLO module signal, at this moment, the signal potential of S1 from the IC is pulled down.

[0052] Since the signals in S2400 of the master IC and S1 of the slave IC are pulled in opposite directions when the control electrodes of GOA are all opened to release the charge, there is a significant difference between the signal potential in S2400 of the master IC and the signal potential in S1 of the slave IC, and they gradually become consistent after a certain period of time. Figure 3 It can be seen that when the control electrode of GOA is closed, there is still a difference between the signal potential in S2400 of the master IC and the signal potential in S1 of the slave IC, so the difference between the voltages will be locked into the pixel circuit corresponding to the GOA circuit. Since the above voltage difference is locked in the pixel, and the voltage difference causes a difference in the amount of charge in the corresponding pixel circuit, when the screen is turned on again, the screen display will have a split screen phenomenon (also known as the power-on split screen phenomenon), and the greater the above voltage difference, the more obvious the split screen phenomenon. Therefore, even if the consistency between the output signals of the master IC and the slave IC is accurately controlled when the screen is working normally, the split screen phenomenon that exists when the screen is turned on again cannot be avoided.

[0053] According to production statistics, the product defective rate caused by the split screen phenomenon on the above-mentioned screens accounts for 20% of the total defective products, seriously affecting the production yield and production efficiency of the screens.

[0054] In view of this, an embodiment of the present application proposes a signal control method, which reduces or solves the split screen phenomenon of screen display by adjusting the power-off timing of GOA and master-slave IC, or adjusting the voltage signal waveform of GOA, or adjusting the architecture of the hardware circuit.

[0055] Figure 4 It is a flowchart of a signal control method 400 proposed in an embodiment of the present application.

[0056] The method 400 may be applied to a screen, the screen including a first IC and a second IC, and the method 400 may include the following steps:

[0057] S410: In response to a power-off command signal, a first control signal is sent to the GOA, a second control signal is sent to the first IC, and a third control signal is sent to the second IC, wherein the power-off command signal is used to instruct the screen to power off, the first control signal is used to control the control electrode of the transistor in the GOA to open within a first time period, the second control signal is used to control the first IC to power off at a first moment, and the third control signal is used to control the second IC to power off at a second moment, and the end moment of the first time period is different from the timing of the first moment and / or the second moment.

[0058] The termination moment of the first time period is different from the timing of the first moment and / or the second moment, which means that the termination moment of the first time period is different from the timing of at least one of the first moment and the second moment.

[0059] It should be understood that in the above S410, the following operations may also be performed:

[0060] S405: Receive the power-off instruction signal.

[0061] In some possible embodiments, the power-off instruction signal may be sent by a user through a controller of a screen.

[0062] In some possible embodiments, the first IC may be a master IC, and the second IC may be a slave IC; conversely, the first IC may be a slave IC, and the second IC may be a master IC.

[0063] In some possible embodiments, for a screen with a higher resolution, the screen may also include more than three ICs, and the idea of ​​the above method 400 may also be used for signal control of the screen to perform signal control on the GOA and each IC. For the convenience of description, the present embodiment takes a screen with a dual IC architecture as an example to describe in detail the method proposed in the present embodiment.

[0064] In some possible embodiments, the termination moment of the first time period and the timing of the first moment and / or the second moment may include the following multiple timing relationships:

[0065] Timing relationship 1: The end time of the first period is the same as the timing of the first moment, and is before or after the second moment;

[0066] Timing relationship 2: The end time of the first period is the same as the timing of the second time, and is before or after the first time;

[0067] Timing relationship 3: The end time of the first period is before the first time and after the second time;

[0068] Timing relationship 4: The end time of the first time period is before the second time period and after the first time period;

[0069] Timing relationship 5: the end time of the first period is after the first time and the second time;

[0070] Timing relationship 6: The end time of the first time period is before the first time and the second time.

[0071] In the embodiments of the present application, satisfying any one of the above relationships can alleviate or resolve the screen split-screen phenomenon when the computer is turned on.

[0072] Among them, based on timing relationship 1 and timing relationship 2, the screen split phenomenon when the computer is turned on can be effectively reduced.

[0073] Figure 5 It is a timing diagram for controlling multiple signals based on timing relationship 1 proposed in an embodiment of the present application.

[0074] Figure 5 The waveform of the voltage signal of GOA, the waveform of the voltage signal of the VGHO module in the first IC, the waveform of the voltage signal of S2400 in the first IC, the waveform of the voltage signal of the VGLO module in the second IC, and the waveform of the voltage signal of S1 in the second IC are shown during the screen power-off operation.

[0075] Among them, the VGHO module is used to output a high gate voltage, which is used to control the control electrode of the transistor in GOA to turn on. The VGLO module is used to output a low gate voltage, which is used to control the control electrode of the transistor in GOA to turn off. Before the screen is powered off, the high gate voltage is a high level and the low gate voltage is a low level.

[0076] It should be understood that in the above Figure 5 In the subsequent timing diagrams, the waveforms of the high gate voltage of the VGHO module and the low gate voltage of the VGLO module in the first IC should be consistent with the waveforms of the voltage signal of the VGHO module and the voltage signal of the VGLO module in the second IC, respectively. Figure 5 Only the waveform of the voltage signal of the VGHO module in the first IC and the waveform of the voltage signal of the VGLO module in the second IC are shown.

[0077] In addition, the first control signal can be understood as a driving Figure 5 The voltage signal of GOA is raised from a low potential to a high potential, and the high potential is maintained for a first period of time. Alternatively, the first control signal can be understood as Figure 5 The voltage signal of GOA itself. The second control signal and the third control signal are the same.

[0078] In some possible embodiments, the voltage signal of the GOA may be independent of the voltage signals output by the VGHO module and the VGLO module, that is, the waveform of the voltage signal of the GOA may not be affected by the voltage signals output by the VGHO module and the VGLO module. However, for the existing IC design, the waveform of the voltage signal of the GOA needs to be determined in combination with the control logic of the first IC or the second IC for the signal, the high gate voltage, and the low gate voltage.

[0079] refer to Figure 5 As shown, taking the end time of the first period after the second time as an example, after GOA controls the control electrode of the transistor to open the first period based on the first control signal, the control electrode of the transistor of GOA begins to close. Before the control electrode is closed, the second IC has been powered off, so at the end time of the first period, the signal pulling effect of S1 in the second IC has been weakened or even disappeared. While the control electrode of the transistor of GOA is closed, the first IC is powered off and has a pulling effect on the signal of S2400 in the first IC. Since the signal pulling effect of S1 in the second IC has been weakened or even disappeared at this time, the difference between the signal potential in S2400 of the first IC and the signal potential in S1 of the second IC is reduced, so the screen split phenomenon when the screen is turned on can be alleviated.

[0080] Figure 6It is a timing diagram for controlling multiple signals based on timing relationship 2 proposed in an embodiment of the present application.

[0081] refer to Figure 6 As shown, taking the end time of the first period after the first moment as an example, after GOA controls the control electrode of the transistor to open the first period based on the first control signal, the control electrode of the transistor of GOA begins to close. Before the control electrode is closed, the first IC has been powered off, so at the end time of the first period, the signal pulling effect of S2400 in the first IC has been weakened or even disappeared. While the control electrode of the transistor of GOA is closed, the second IC is powered off and has a pulling effect on the signal of S1 in the second IC. Since the signal pulling effect of S2400 in the first IC has been weakened or even disappeared at this time, the difference between the signal potential in S2400 of the first IC and the signal potential in S1 of the second IC is reduced, so the screen split phenomenon when the screen is turned on can be alleviated.

[0082] Among them, based on the timing relationships 3 to 6, the screen split phenomenon when the computer is turned on can be effectively reduced or even solved.

[0083] Figure 7 It is a timing diagram for controlling multiple signals based on timing relationship 3 proposed in an embodiment of the present application.

[0084] refer to Figure 7 As shown, since the end time of the first period is after the second time, the second IC has been powered off before the control electrode of the transistor in GOA is closed, and the signal pulling effect of S1 in the second IC has weakened or even disappeared. At this time, the power-off operation of the first IC has not been executed, so there will be no pulling effect on the signal of S2400 in the first IC.

[0085] If the time interval between the end moment of the first time period and the second moment reaches a certain threshold (i.e., the duration of the signal pulling effect of S1 in the second IC), then at the end moment of the first time period, the signal of S2400 in the first IC and the signal of S1 in the second IC will not be pulled, so there is no difference between the signal potential in S2400 of the first IC and the signal potential in S1 of the second IC, so it will not affect the operation of the GOA transistor releasing charge.

[0086] When the time comes to the first moment, the first IC is powered off, which will have a pulling effect on the signal of S2400 of the first IC. However, the control electrode of the transistor in GOA is closed at this time, so even if there is a difference between the signal potential in S2400 of the first IC and the signal potential in S1 of the second IC, the difference will not be locked into the pixel circuit of GOA, so it will not cause the screen to split when it is turned on.

[0087] Figure 8It is a timing diagram for controlling multiple signals based on timing relationship 4 proposed in an embodiment of the present application.

[0088] refer to Figure 8 As shown, since the end time of the first period is after the first time, the first IC has been powered off before the control electrode of the transistor in GOA is turned off, and the signal pulling effect of S2400 in the first IC has been weakened or even disappeared. At this time, the power-off operation of the second IC has not been executed, so there will be no pulling effect on the signal of S1 in the second IC.

[0089] If the time interval between the end moment of the first time period and the first moment reaches a certain threshold (i.e., the duration of the signal pulling effect of S2400 in the first IC), then at the end moment of the first time period, the signal of S2400 in the first IC and the signal of S1 in the second IC will not be pulled, so there is no difference between the signal potential in S2400 of the first IC and the signal potential in S1 of the second IC, so it will not affect the operation of the GOA transistor to release charge.

[0090] When the time comes to the first moment, the second IC is powered off, which will have a pulling effect on the signal of S1 of the second IC. However, the control electrode of the transistor in GOA is closed at this time, so even if there is a difference between the signal potential in S1 of the second IC and the signal potential in S2400 of the first IC, the difference will not be locked into the pixel circuit of GOA, so it will not cause the screen to split when it is turned on.

[0091] Fig. 9 It is a timing diagram for controlling multiple signals based on the timing relationship 5 proposed in an embodiment of the present application.

[0092] In this example, the first time and the second time are the same time.

[0093] In some possible embodiments, when the first moment and the second moment are the same moment, the second control signal and the third control signal may be the same control signal, but the control signal is sent to the first IC and the second IC at the same time.

[0094] refer to Fig. 9 As shown, since the end time of the first period is after the first moment and the second moment, the first IC and the second IC have been powered off before the control electrode of the transistor in GOA is closed. At this time, the signal pulling effect of S2400 in the first IC and the signal pulling effect of S1 in the second IC have been weakened or even disappeared.

[0095] If the time interval between the end moment of the first time period and the first moment or the second moment reaches a certain threshold, and the threshold may be greater than or equal to the larger value of the duration of the signal pulling effect of S2400 in the first IC and the duration of the signal pulling effect of S1 in the second IC, then at the end moment of the first time period, the signal of S2400 in the first IC and the signal of S1 in the second IC are both restored to the power-off state, that is, there is no difference between the signal potential in S2400 of the first IC and the signal potential in S1 of the second IC, so there is no effect on the operation of releasing the charge of the transistor of GOA, so when the control electrode of the transistor in GOA is controlled to be closed at the end moment of the first time period, even if the pulling effects of the first IC and the second IC generate additional charges, these additional charges will not be locked into the pixel circuit corresponding to GOA, so the screen will not be split when it is turned on.

[0096] Fig.10 It is a timing diagram for controlling multiple signals based on timing relationship 6 proposed in an embodiment of the present application.

[0097] refer to Fig.10 As shown, in this example, the first moment and the second moment are the same moment. Since the end moment of the first period is before the first moment and the second moment, the first IC and the second IC start to power off after the control electrode of the transistor in GOA is closed. Therefore, at the end moment of the first period, the first IC and the second IC are not powered off, so there is no significant change in the signal potential of the first IC and the second IC. Even if the first IC and the second IC are powered off later and a pulling effect is generated, and the control electrode of the transistor in GOA is closed at this time, the extra charge generated by the pulling effect will not be locked into the pixel circuit corresponding to GOA, so it will not cause the screen to split when it is turned on.

[0098] In some possible embodiments, when the screen is an oxide screen, the above-mentioned timing relationship 6 can be selected to control the power-off of various devices on the screen. When the timing at the first moment is the same as the timing at the second moment, the above-mentioned method 400 can also include the following steps: sending a fourth control signal to GOA, and the fourth control signal is used to adjust the voltage of GOA to a target voltage at the end time of the first time period, and the target voltage is a negative voltage.

[0099] In some possible embodiments, the oxide screen may be a screen using metal oxide as a thin film transistor (TFT) channel material, wherein the metal oxide may be indium gallium zinc oxide (IGZO). Alternatively, the oxide screen may be a low temperature polycrystalline oxide (LTPO) screen.

[0100] In some possible embodiments, the target voltage may be equal to a low gate voltage of the first IC or the second IC, and the low gate voltage is used to control the control electrode of the transistor in the GOA to be turned off.

[0101] Based on the description of the foregoing embodiments, it can be known that in the signal control logic of the oxide screen IC proposed at this stage, the opening or closing of the control electrode of the transistor in GOA is directly affected by the high gate voltage output by the VGHO module and the low gate voltage output by the VGLO module. Therefore, if the signal voltage of GOA is directly controlled to return to the GND voltage, it is necessary to control the high gate voltage of the VGHO module and the low gate voltage of the VGLO module to return to the GND voltage, which causes the first IC and the second IC to be powered off and produce a pulling effect, which affects the electrostatic release operation of the transistor in GOA, making it impossible to completely release the static electricity in the transistor, thereby causing the screen to split when it is turned on.

[0102] Therefore, the embodiment of the present application proposes that the signal voltage of GOA is pulled to the low gate voltage of the VGLO module for the above application scenario. In order to keep the signal voltage of GOA at the level of the low gate voltage, the voltage signals output by the VGHO module and the VGLO module will not return to the GND voltage, and at this time, the signal waveform of GOA has a falling edge, which means that the control electrode of the transistor in GOA has been turned off. After this moment, the voltage signals of the VGHO module and the VGLO module are adjusted to the GND voltage to complete the power-off operation of the first IC and the second IC, and at this time, the control electrode of the transistor in GOA has been turned off, even if the power-off operation of the first IC and the second IC produces a pulling effect, it will not cause the corresponding electrostatic effect on the transistor in GOA, so it will not cause the screen to split when it is turned on.

[0103] In some possible embodiments, the duration that the voltage of the GOA is maintained at the target voltage can be controlled by adjusting the time interval between the end time of the first period and the first moment or the second moment.

[0104] For example, the time interval between the end time of the first period and the first time or the second time may be determined according to the hardware performance of the screen. For a conventional oxide screen, the time duration may be [2 ms, 15 ms].

[0105] In some possible embodiments, after the voltage of GOA is adjusted to the target voltage and the above-mentioned duration has passed, GOA can perform a power-off operation, and the power-off operation can be achieved through the following steps: sending a fifth control signal to GOA, and the fifth control signal is used to adjust the voltage of GOA to the ground voltage at the first moment or the second moment.

[0106] In some possible embodiments, the fourth control signal and the fifth control signal may be combined into one control signal, which is used to adjust the voltage of GOA to the target voltage at the end of the first period and maintain the second period. Based on the description of the above embodiment, it can be seen that the start time of the second period is the end time of the first period, and the end time of the second period is the first time or the second time.

[0107] Fig.11 It is a timing diagram for controlling multiple signals based on the timing relationship 6 for an oxide screen proposed in an embodiment of the present application.

[0108] refer to Fig.11 As shown, at the end of the first period, the control electrode of the transistor in GOA is closed, and the voltage signal of GOA is pulled down to the target voltage, that is, the low gate voltage of the first IC or the second IC, so that the charge of the transistor in GOA of the oxide screen can be better released, and the voltage state is maintained for the second period. In this example, the end time of the second period is the first moment or the second moment mentioned above, so at the end of the second period, the power-off operation of the first IC and the second IC is triggered and a pulling effect is generated. Since the GOA circuit has maintained a low potential in the second period, the charge of the transistor in GOA is completely released, so the extra charge generated by the pulling effect between the first IC and the second IC will not be locked into the pixel circuit corresponding to GOA, so it will not cause the screen to split when it is turned on.

[0109] In some possible embodiments, the end time of the second time period may also be before the first time or the second time.

[0110] Of course, the above signal control method can also be used for other types of non-oxide screens, which can also solve the problem of screen splitting when the screen is turned on.

[0111] Based on the above technical solution, by adjusting the power-off timing of the GOA, the first IC, and the second IC in the screen through signal control, the charge of the transistor in the GOA can be completely released before the control electrode of the transistor is turned off, and it will not be affected by the signal pulling effect caused by the power-off of the first IC and the second IC, and there will be no problem of incomplete static electricity release in the transistor in the GOA. Therefore, when the screen is turned on again, since the static electricity inside the transistor in the GOA has been completely released, the screen will not split when it is turned on, which will help improve the production yield and production efficiency of the screen. In addition, this solution is not only applicable to non-oxide screens, but also to oxide screens, making this solution highly compatible and flexible.

[0112] In addition, the embodiment of the present application also proposes another signal control method to alleviate the screen split-screen phenomenon when the screen is turned on from another perspective.

[0113] Fig.12 It is a flowchart of another signal control method 1200 proposed in an embodiment of the present application.

[0114] refer to Fig.12 As shown, the method 1200 is also applied to a screen, the screen includes a first IC and a second IC, and the VGHO module of the first IC is adjacent to the VGLO module of the second IC. The method 1200 may include the following steps:

[0115] S1210: In response to a power-off command signal, a first control signal is sent to the GOA, a second control signal is sent to the first IC, and a third control signal is sent to the second IC, wherein the power-off command signal is used to instruct the screen to power off, the first control signal is used to open the control electrode of the transistor in the GOA, the second control signal is used to control the first IC to power off, and the absolute value of the falling edge slope of the voltage signal of the VGHO module of the first IC is controlled to be less than or equal to the slope threshold, and the third control signal is used to control the second IC to power off, and the rising edge slope of the voltage signal of the VGLO module of the second IC is controlled to be less than or equal to the slope threshold.

[0116] Among them, the slope threshold is a positive value.

[0117] It should be understood that in the above S1210, the following operations may also be performed:

[0118] S1205: Receive the power-off instruction signal.

[0119] Fig.13 This is a timing diagram for controlling multiple signals when the screen is powered off, as proposed in an embodiment of the present application.

[0120] refer to Fig.13 As shown, based on the above method 1200, since the absolute value of the falling edge slope of the voltage signal of the VGHO module controlling the first IC is less than or equal to the slope threshold, and the rising edge slope of the voltage signal of the VGLO module controlling the second IC is less than or equal to the slope threshold, when the first IC and the second IC are powered off, the signal pulling effect of S2400 in the first IC and the signal pulling effect of S1 in the second IC are weakened, even if the first control signal, the second control signal and the third control signal are sent at the same time and trigger the power-off operation of the corresponding device, the weakened signal pulling effect has a limited effect on the charge release of the transistor in the GOA, so that the screen split-screen phenomenon at power-on is no longer obvious, and even the human eye cannot perceive the occurrence of the split-screen phenomenon.

[0121] In some possible embodiments, the above slope threshold may be preconfigured.

[0122] Based on the above technical solution, by reducing the absolute value of the falling edge slope of the voltage signal of the VGHO module of the first IC and the rising edge slope of the voltage signal of the VGLO module of the second IC when the first IC and the second IC are powered off, the signal pulling effect of the first IC and the second IC is weakened, so that the split-screen phenomenon when the screen is turned on is no longer obvious, and even the human eye cannot perceive the occurrence of the split-screen phenomenon.

[0123] In addition, the embodiment of the present application adjusts the layout of the screen circuit components from the perspective of hardware design to solve the problem of the screen being split when powered on.

[0124] Fig.14 It is a circuit architecture diagram of a screen 1400 proposed in an embodiment of the present application.

[0125] refer to Fig.14 As shown, the screen 1400 includes: a display panel, and a plurality of ICs ( Fig.14 There are 2 ICs in the example, namely the first IC and the second IC), wherein the IC is connected to the display panel through a power cable, the IC includes a VGHO module, a VGLO module and a ground line, the power cable includes a first power signal line and a second power signal line, the first power signal line is located on the first side of the power cable, and the second power signal line is located on the second side of the power cable.

[0126] The distances between the first power signal line and the ground line, the VGHO module and the VGLO module are greater than or equal to the distance threshold, and the distances between the second power signal line and the ground line, the VGHO module and the VGLO module are greater than or equal to the distance threshold.

[0127] In some possible embodiments, the first power signal line and the ground line, the VGHO module and the VGLO module may be filled with dummy lines or other elements to increase the distance between the first power signal line and the ground line, the VGHO module and the VGLO module, so that the distance can be greater than or equal to the distance threshold.

[0128] Similarly, the second power signal line and the ground line, the VGHO module and the VGLO module may be filled with dummy lines or other elements to increase the distance between the second power signal line and the ground line, the VGHO module and the VGLO module, so that the distance can be greater than or equal to the distance threshold.

[0129] In some possible embodiments, the power cable is composed of multiple signal lines arranged side by side, for example, 2400 signal lines, so the first side of the power cable refers to the first signal line among these signal lines arranged side by side, such as S1 in the aforementioned embodiment; the second side of the power cable is designated as the last signal line among these signal lines arranged side by side, such as S2400 in the aforementioned embodiment.

[0130] It should be understood that, taking an IC as an example, based on the above circuit architecture, since the distances between the first power signal line and the ground line, the VGHO module and the VGLO module are respectively large enough, even when the IC is powered off, the VGLO module will not produce a pulling effect on the signal transmitted in the first power signal line, and the VGHO module will not produce a pulling effect on the signal transmitted in the second power signal line.

[0131] Based on the above technical solution, by designing the circuit architecture of the screen, the distance between the first power signal line and the ground line, VGHO module and VGLO module in the IC is increased, as is the distance between the second power signal line and the ground line, VGHO module and VGLO module. This ensures that when the IC is powered off, there will be no pulling effect on the signals transmitted by the first power signal line and the second power signal line, thereby preventing the static electricity of the transistor in the GOA from being completely released and preventing the screen from splitting when it is turned on.

[0132] The embodiments of the present application also provide a signal control device, which includes a module or unit for executing any signal control method provided in the embodiments of the present application.

[0133] Fig.15 It is a schematic diagram of a signal control device 1500 proposed in an embodiment of the present application.

[0134] refer to Fig.15 As shown, the device 1500 is applied to a screen, and the device 1500 includes:

[0135] The control unit 1510 is used to send a first control signal to the gate drive circuit GOA, send a second control signal to the first IC, and send a third control signal to the second IC in response to a power-off command signal, wherein the power-off command signal is used to instruct the screen to power off, the first control signal is used to control the control electrode of the transistor in GOA to open within a first time period, the second control signal is used to control the first IC to power off at a first moment, and the third control signal is used to control the second IC to power off at a second moment, and the end moment of the first time period is different from the timing of the first moment and / or the second moment.

[0136] In some possible embodiments, the apparatus 1500 further includes:

[0137] The receiving unit 1505 is used to receive the power-off instruction signal.

[0138] In some possible embodiments, the end time of the first time period is before the first time and the second time, or the end time of the first time period is after the first time and the second time, or the end time of the first time period is before the first time and after the second time, or the end time of the first time period is before the second time and after the first time.

[0139] In some possible embodiments, when the end time of the first time period is before the first time and the second time, and the timing of the first time and the second time is the same, the control unit 1510 is also used to: send a fourth control signal to GOA, and the fourth control signal is used to adjust the voltage of GOA to a target voltage at the end time, and the target voltage is a negative voltage.

[0140] In some possible embodiments, the target voltage is equal to a low gate voltage of the first IC or the second IC.

[0141] In some possible embodiments, the control unit 1510 is further configured to: send a fifth control signal to the GOA, where the fifth control signal is configured to adjust the voltage of the GOA to the ground voltage at the first moment or the second moment.

[0142] In some possible embodiments, the screen is an oxide screen.

[0143] In some possible embodiments, the present application embodiment proposes another signal control device, which can be applied to a screen, the screen includes a first IC and a second IC, the VGHO module of the first IC is adjacent to the VGLO module of the second IC, and the architecture of the device can reuse the above Fig.15 In the device 1500, in this embodiment, the control unit 1510 is used to, in response to a power-off instruction signal, send a first control signal to the GOA, send a second control signal to the first IC, and send a third control signal to the second IC, wherein the power-off instruction signal is used to instruct the screen to power off, the first control signal is used to open the control electrode of the transistor in the GOA, the second control signal is used to control the first IC to power off, and the absolute value of the falling edge slope of the voltage signal of the VGHO module of the first IC is controlled to be less than or equal to the slope threshold, and the third control signal is used to control the second IC to power off, and the rising edge slope of the voltage signal of the VGLO of the second IC is controlled to be less than or equal to the slope threshold.

[0144] In addition, an embodiment of the present application also proposes another signal control device, which includes a processor and a memory, and the processor and the memory are connected, wherein the memory is used to store program code, and the processor is used to call the program code to execute any signal control method proposed in the embodiment of the present application.

[0145] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0146] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0147] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0148] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0149] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0150] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0151] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A signal control method, characterized in that: Applied to a screen, the screen includes a first IC and a second IC, the method includes: In response to a power-off command signal, a first control signal is sent to the gate drive circuit GOA, a second control signal is sent to the first IC, and a third control signal is sent to the second IC, wherein the power-off command signal is used to instruct the screen to power off, the first control signal is used to control the control electrode of the transistor in the GOA to open within a first time period, the second control signal is used to control the first IC to power off at a first moment, and the third control signal is used to control the second IC to power off at a second moment, and the end moment of the first time period is different from the timing of the first moment and / or the second moment.

2. The method according to claim 1, characterized in that The termination time is before the first time and the second time, or the termination time is after the first time and the second time, or the termination time is before the first time and after the second time, or the termination time is before the second time and after the first time.

3. The method according to claim 2, characterized in that In the case where the termination time is before the first time and the second time, and the first time and the second time are in the same time sequence, the method further includes: A fourth control signal is sent to the GOA, where the fourth control signal is used to adjust the voltage of the GOA to a target voltage at the termination time, where the target voltage is a negative voltage.

4. The method according to claim 3, characterized in that The target voltage is equal to a low gate voltage of the first IC or the second IC, and the low gate voltage is used to control the gate of the transistor to be turned off.

5. The method according to claim 3 or 4, characterized in that: The method further comprises: A fifth control signal is sent to the GOA, where the fifth control signal is used to adjust the voltage of the GOA to a ground voltage at the first moment or the second moment.

6. The method according to claim 5, characterized in that The screen is an oxide screen.

7. A signal control method, characterized in that: Applied to a screen, the screen includes a first IC and a second IC, a high voltage output VGHO module of the first IC is adjacent to a low voltage output VGLO module of the second IC, the VGHO module is used to output a high gate voltage, the high gate voltage is used to control the control electrode of the transistor in the GOA to turn on, the VGLO module is used to output a low gate voltage, the low gate voltage is used to control the control electrode of the transistor in the GOA to turn off, before the screen is powered off, the high gate voltage is a high level, the low gate voltage is a low level, the method includes: In response to a power-off command signal, a first control signal is sent to the GOA, a second control signal is sent to the first IC, and a third control signal is sent to the second IC, wherein the power-off command signal is used to instruct the screen to power off, the first control signal is used to open the control electrode of the transistor in the GOA, the second control signal is used to control the first IC to power off, and control the absolute value of the falling edge slope of the high gate voltage to be less than or equal to the slope threshold, and the third control signal is used to control the second IC to power off, and control the rising edge slope of the low gate voltage to be less than or equal to the slope threshold.

8. A signal control device, characterized in that: It comprises a processor and a memory, wherein the processor and the memory are connected, wherein the memory is used to store program code, and the processor is used to call the program code to execute the method according to any one of claims 1 to 6, or execute the method according to claim 7.

9. A screen, characterized in that: The screen includes: a display panel, and a plurality of adjacently arranged ICs, wherein the IC is connected to the display panel via a power cable, wherein the IC includes a VGHO module, a VGLO module, and a ground line, wherein the power cable includes a first power signal line and a second power signal line, wherein the first power signal line is located on a first side of the power cable, and the second power signal line is located on a second side of the power cable, wherein the distances between the first power signal line and the ground line, the VGHO module, and the VGLO module are respectively greater than or equal to a distance threshold, and the distances between the second power signal line and the ground line, the VGHO module, and the VGLO module are respectively greater than or equal to the distance threshold.

10. A screen, characterized in that: A device comprising the signal control as claimed in claim 8.

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