Driving method of display device, display device

Abstract

The embodiment of the present application provides a display device driving method and display device, relates to the display field, and improves display abnormality. The driving method comprises the following steps: switching from a second mode to a first mode, a second driving module generates a first power supply voltage, and simultaneously or subsequently, a first driving module generates the first power supply voltage, and subsequently, the second driving module stops generating the power supply voltage; switching from the first mode to the second mode, the first driving module generates a second power supply voltage, and simultaneously or subsequently, the second driving module generates the second power supply voltage, and subsequently, the first driving module stops generating the power supply voltage; or, the first driving module is connected with a display panel through a first switch, and the second driving module is connected with the display panel through a second switch; the driving method comprises the following steps: switching from the second mode to the first mode, the first driving module generates the first power supply voltage earlier than the first switch being turned on; and switching from the first mode to the second mode, the second driving module generates the second power supply voltage earlier than the second switch being turned on.

Description

[Technical Field]

[0001] This invention relates to the field of display technology, and more particularly to a driving method for a display device and a display device. [Background Technology]

[0002] The display device has multiple display modes. From the perspective of saving power consumption, different driver modules can be used to provide power voltage to the power lines in the display panel in different display modes.

[0003] When a display device switches modes, to avoid power conflicts, the current method typically involves first shutting down the power supply voltage generated by the current driver module and then enabling the other driver module to start generating power. However, in this switching method, there is a time interval between when the current driver module stops generating power and when the other driver module starts generating power. During this time interval, the voltage on the power line will fluctuate significantly, leading to display abnormalities.

[0004] To address this display anomaly caused by power switching, existing technology displays several black frames within the aforementioned time interval to make the anomaly invisible. However, these black frames create noticeable black screen intervals during mode switching, thus failing to truly achieve a display without anomalies. [Summary of the Invention]

[0005] In view of this, embodiments of the present invention provide a driving method for a display device and a display device to solve display abnormalities during mode switching.

[0006] On one hand, embodiments of the present invention provide a driving method for a display device, the display device comprising:

[0007] The display panel writes a first power supply voltage in a first mode and a second power supply voltage in a second mode.

[0008] A first driving module, coupled to the display panel, generates the first power supply voltage at least in the first mode;

[0009] The second driving module is coupled to the display panel and generates the second power supply voltage at least in the second mode;

[0010] The driving method includes:

[0011] When switching from the second mode to the first mode, the power supply voltage generated by the second driving module is switched from the second power supply voltage to the first power supply voltage, and the first driving module is made to generate the first power supply voltage. The time when the first driving module starts to generate the first power supply voltage is no earlier than the time when the second driving module starts to generate the first power supply voltage. After the first driving module generates the first power supply voltage, the second driving module stops generating the first power supply voltage.

[0012] When switching from the first mode to the second mode, the power supply voltage generated by the first driving module is switched from the first power supply voltage to the second power supply voltage, and the second driving module is made to generate the second power supply voltage. The time when the second driving module starts generating the second power supply voltage is no earlier than the time when the first driving module starts generating the second power supply voltage. After the second driving module generates the second power supply voltage, the first driving module stops generating the second power supply voltage.

[0013] Alternatively, the first driving module is connected to the display panel via a first switch, and the second driving module is connected to the display panel via a second switch;

[0014] The driving method includes:

[0015] When switching from the second mode to the first mode, the first driving module generates the first power supply voltage, controls the second switch to be turned off and controls the first switch to be turned on, wherein the time when the first driving module starts generating the first power supply voltage is earlier than the time when the first switch is turned on.

[0016] When switching from the first mode to the second mode, the second driving module generates the second power supply voltage, controls the first switch to turn off and controls the second switch to turn on, wherein the second driving module starts generating the second power supply voltage earlier than the time when the second switch is turned on.

[0017] On the other hand, embodiments of the present invention provide a display device, including:

[0018] The display panel writes a first power supply voltage in a first mode and a second power supply voltage in a second mode.

[0019] A first driving module, coupled to the display panel, generates the first power supply voltage at least in the first mode;

[0020] The second driving module is coupled to the display panel and generates the second power supply voltage at least in the second mode;

[0021] When switching from the second mode to the first mode, the power supply voltage generated by the second driving module jumps from the second power supply voltage to the first power supply voltage, and the first driving module generates the first power supply voltage. The time when the first driving module starts generating the first power supply voltage is no earlier than the time when the second driving module starts generating the first power supply voltage. After the first driving module generates the first power supply voltage, the second driving module stops generating the first power supply voltage.

[0022] When switching from the first mode to the second mode, the power supply voltage generated by the first driving module changes from the first power supply voltage to the second power supply voltage, and the second driving module generates the second power supply voltage. The time when the second driving module starts generating the second power supply voltage is no earlier than the time when the first driving module starts generating the second power supply voltage. After the second driving module generates the second power supply voltage, the first driving module stops generating the second power supply voltage.

[0023] In another aspect, embodiments of the present invention provide a display device, comprising:

[0024] The display panel writes a first power supply voltage in a first mode and a second power supply voltage in a second mode.

[0025] A first driving module is connected to the display panel via a first switch and generates the first power supply voltage at least in the first mode.

[0026] The second driving module is connected to the display panel via a second switch and generates the second power supply voltage at least in the second mode.

[0027] When switching from the second mode to the first mode, the first drive module generates the first power supply voltage, the second switch is turned off, and the first switch is turned on. The time when the first drive module starts generating the first power supply voltage is earlier than the time when the first switch is turned on.

[0028] When switching from the first mode to the second mode, the second drive module generates the second power supply voltage, the first switch is turned off, and the second switch is turned on. The second drive module starts generating the second power supply voltage earlier than the time when the second switch is turned on.

[0029] One of the above technical solutions has the following beneficial effects:

[0030] Based on the first driving method described above, when switching from the previous mode to the next mode, the power signal generated by the previous driving module (the previous driving module refers to the driving module that provides the required power voltage to the display panel in the previous mode; when switching from the first mode to the second mode, the previous driving module is the first driving module, and when switching from the second driving module to the second mode, the previous driving module is the second driving module) is not directly turned off. Instead, the power signal generated by the previous driving module is changed from the power voltage required by the previous mode to the power voltage required by the next mode. At the same time or after this, the next driving module (the next driving module refers to the driving module that provides the required power voltage to the display panel in the next mode; when switching from the first mode to the second mode, the next driving module is the second driving module, and when switching from the second driving module to the second mode, the next driving module is the first driving module) also begins to generate the power voltage required by the next mode. After this, the power signal generated by the previous driving module is turned off. This switching method achieves seamless switching between the previous and subsequent driving modules by delaying the shutdown of the power signal generated by the previous driving module. During the switching process, the display panel can still continuously receive the power voltage provided by the driving module, thus effectively solving the voltage fluctuation and display abnormality problems caused by the long time interval in the prior art.

[0031] Alternatively, based on the second driving method described above, when switching from the previous mode to the next mode, before turning on the switch connected to the next driving module, the next driving module is made to start generating the power supply voltage required for the next mode in advance. This allows the power supply voltage required for the next mode to be transmitted in advance on the signal transmission path between the next driving module and the switch. Then, when the switch is turned on later, the power supply voltage can be transmitted to the display panel more quickly, shortening the time interval that may exist during power switching. This can effectively improve the voltage fluctuation and display abnormality problems caused by the long time interval in the prior art. [Attached Image Description]

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of a display device provided in an embodiment of the present invention;

[0034] Figure 2 for Figure 1 A corresponding timing diagram;

[0035] Figure 3 This is another structural schematic diagram of the display device provided in an embodiment of the present invention;

[0036] Figure 4 for Figure 3 A corresponding timing diagram;

[0037] Figure 5 for Figure 1 Another corresponding timing diagram;

[0038] Figure 6 for Figure 1 Another corresponding timing diagram;

[0039] Figure 7 for Figure 3 Another corresponding timing diagram;

[0040] Figure 8 This is another structural schematic diagram of the display device provided in the embodiment of the present invention;

[0041] Figure 9 This is another structural schematic diagram of the display device provided in an embodiment of the present invention;

[0042] Figure 10 for Figure 9 A corresponding timing diagram.

Detailed Implementation Methods

[0043] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0045] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0046] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0047] This invention provides a driving method for a display device, such as... Figures 1-4 As shown, Figure 1 This is a schematic diagram of a display device provided in an embodiment of the present invention. Figure 2 for Figure 1 A corresponding timing diagram, Figure 3 This is another structural schematic diagram of the display device provided in an embodiment of the present invention. Figure 4 for Figure 3 A corresponding timing diagram shows that the display device includes a display panel 100, a first driving module 200, and a second driving module 300.

[0048] The display panel 100 can be a panel of the type of organic light-emitting diode (OLED), and the display panel 100 writes a first power supply voltage VP1 in the first mode M1 and writes a second power supply voltage VP2 in the second mode M2.

[0049] The first driving module 200 is coupled to the display panel 100, and the first driving module 200 generates a first power supply voltage VP1 at least in the first mode M1. The second driving module 300 is coupled to the display panel 100, and the second driving module 300 generates a second power supply voltage VP2 at least in the second mode M2. That is, in the first mode M1, the first power supply voltage VP1 required for the display panel 100 to be written must be provided by the first driving module 200, and in the second mode M2, the second power supply voltage VP2 required for the display panel 100 to be written must be provided by the second driving module 300.

[0050] Combination Figure 1 and Figure 2 The driving method for the display device includes:

[0051] When switching from the second mode M2 ​​to the first mode M1, the power supply voltage generated by the second drive module 300 is switched from the second power supply voltage VP2 to the first power supply voltage VP1, and the first drive module 200 generates the first power supply voltage VP1. The time when the first drive module 200 starts generating the first power supply voltage VP1 is no earlier than the time when the second drive module 300 starts generating the first power supply voltage VP1. After the first drive module 200 generates the first power supply voltage VP1, the second drive module 300 stops generating the first power supply voltage VP1. For example, see [link to example]. Figure 2 At the first moment t1, the second drive module 300 starts generating the first power supply voltage VP1. At the second moment t2, the first drive module 200 starts generating the first power supply voltage VP1. The second moment t2 occurs simultaneously with the first moment t1, or the second moment t2 occurs later than the first moment t1. At the third moment t3 after the second moment t2, the second drive module 300 stops generating the first power supply voltage VP1.

[0052] When switching from the first mode M1 to the second mode M2, the power supply voltage generated by the first drive module 200 is switched from the first power supply voltage VP1 to the second power supply voltage VP2, and the second drive module 300 generates the second power supply voltage VP2. The second drive module 300 begins generating the second power supply voltage VP2 no earlier than the first drive module 200 begins generating the second power supply voltage VP2. After the second drive module 300 generates the second power supply voltage VP2, the first drive module 200 stops generating the second power supply voltage VP2. For example, see [link to example]. Figure 2 At the fourth time t4, the first drive module 200 starts to generate the first power supply voltage VP1. At the fifth time t5, the second drive module 300 starts to generate the second power supply voltage VP2. The fifth time t5 occurs simultaneously with the fourth time t4, or the fifth time t5 occurs later than the fourth time t4. At the sixth time t6 after the fifth time t5, the first drive module 200 stops generating the second power supply voltage VP2.

[0053] Based on this driving method, when switching from one mode to another, the power signal generated by the previous driving module (the previous driving module refers to the driving module that provides the required power voltage to the display panel in the previous mode; when switching from the first mode to the second mode, the previous driving module is the first driving module, and when switching from the second driving module to the second mode, the previous driving module is the second driving module) is not directly turned off. Instead, the power signal generated by the previous driving module is changed from the power voltage required by the previous mode to the power voltage required by the next mode. At the same time or after this, the next driving module (the next driving module refers to the driving module that provides the required power voltage to the display panel in the next mode; when switching from the first mode to the second mode, the next driving module is the second driving module, and when switching from the second driving module to the second mode, the next driving module is the first driving module) also begins to generate the power voltage required by the next mode. After this, the power signal generated by the previous driving module is turned off. This switching method achieves seamless switching between the previous and subsequent driving modules by delaying the shutdown of the power signal generated by the previous driving module, thus eliminating abnormal fluctuations in the power supply voltage within the display panel 100 and effectively solving display abnormality problems during switching.

[0054] Furthermore, in this driving method, the preceding and following driving modules will simultaneously generate power voltages for a period of time. Even if the power signal generated by the following driving module takes a certain period of time to be transmitted to the display panel 100 for it to take effect, the display panel 100 can still receive the power signal generated by the preceding driving module during the time it is not effective. For example, see... Figure 2T1 is the voltage overlap interval between the previous and subsequent drive modules. Since the power supply voltage generated by the two drive modules is the same within this voltage overlap interval, it will not affect the effect.

[0055] Or, combine Figure 3 and Figure 4 The first drive module 200 is connected to the display panel 100 via the first switch 400, and the second drive module 300 is connected to the display panel 100 via the second switch 500.

[0056] The driving methods for display devices include:

[0057] When switching from the second mode M2 ​​to the first mode M1, the first drive module 200 generates a first power supply voltage VP1, controls the second switch 500 to turn off and controls the first switch 400 to turn on. The first drive module 200 begins generating the first power supply voltage VP1 earlier than the time it controls the first switch 400 to turn on. For example, see [link to example]. Figure 4 At the seventh moment t7, the first drive module 200 starts to generate the first power supply voltage VP1. At the eighth moment t8, after the seventh moment t7, the second switch 500 is turned off and the first switch 400 is turned on.

[0058] When switching from the first mode M1 to the second mode M2, the second drive module 300 generates a second power supply voltage VP2, controlling the first switch 400 to turn off and the second switch 500 to turn on. The second drive module 300 begins generating the second power supply voltage VP2 earlier than the time the second switch 500 is turned on. For example, see [link to example]. Figure 4 At the ninth moment t9, the second drive module 300 starts to generate the second power supply voltage VP2. At the tenth moment t10 after the ninth moment t9, the first switch 400 is turned off and the second switch 500 is turned on.

[0059] Based on this driving method, when switching from one mode to another, before the switch connected to the next driving module is turned on, the next driving module is made to start generating the power supply voltage required for the next mode in advance. This allows the power supply voltage required for the next mode to be transmitted in advance on the signal transmission path between the next driving module and the switch. Then, when the switch is turned on later, the power supply voltage can be transmitted to the display panel 100 more quickly, shortening the time interval that may exist during power switching. Therefore, it can effectively improve the voltage fluctuation and display abnormality problems caused by the long time interval in the prior art.

[0060] In one feasible implementation, combined with Figure 1 and Figure 2The driving process of the display panel 100 includes a blank period b and an effective display period d. The effective display period d is the time period during which all pixel rows are scanned once within one frame, and the blank period b is the interval between two adjacent effective display periods d. No pixel rows are scanned during the blank period b.

[0061] When switching from the second mode M2 ​​to the first mode M1, the second drive module 300 generates a first power supply voltage VP1 during a first blank period b1, wherein the first blank period b1 is located between the last valid display period d in the second mode M2 ​​and the first valid display period d in the first mode M1. When switching from the first mode M1 to the second mode M2, the first drive module 200 generates a second power supply voltage VP2 during a second blank period b2, wherein the second blank period b2 is located between the last valid display period d in the first mode M1 and the first valid display period d in the second mode M2.

[0062] As mentioned earlier, when switching from one mode to another, the power supply voltage generated by the previous driving module needs to change from the power supply voltage required by the previous mode to the power supply voltage required by the next mode. This implementation further ensures that the voltage change occurs during the blank period b between the last valid display period d in the previous mode and the first valid display period d in the next mode. This ensures that all valid display periods d in both modes can receive their respective required power supply voltages, thus overcoming display abnormalities without affecting the normal display of the two modes.

[0063] It should be noted that the driving frequency of the display panel 100 may differ in the first mode M1 and the second mode M2, therefore the corresponding frame time in the two modes may also be different. For example, when the driving frequency of the display panel 100 in the first mode M1 is lower than the driving frequency in the second mode M2, see [reference needed]. Figure 2 The frame time F1 corresponding to the first mode M1 is greater than the frame time F2 corresponding to the second mode M2. Accordingly, the duration of the blank period b in frame time F1 is greater than the duration of the blank period b in frame time F2, and the duration of the effective display period d in frame time F1 is greater than the duration of the effective display period d in frame time F2.

[0064] Therefore, the durations of the first blank time period b1 and the second blank time period b2 can be different. However, since the voltage switching speed of the drive module is very fast, the power supply voltage switching operation can be completed in both blank time periods b, regardless of which is longer or shorter.

[0065] In one feasible implementation, such as Figure 5 As shown, Figure 5 for Figure 1 In another corresponding timing diagram, when switching from the second mode M2 ​​to the first mode M1, the time when the first drive module 200 starts generating the first power supply voltage VP1 (second time t2) is later than the time when the second drive module 300 starts generating the first power supply voltage VP1 (first time t1). When switching from the first mode M1 to the second mode M2, the time when the second drive module 300 starts generating the second power supply voltage VP2 (fifth time t5) is later than the time when the first drive module 200 starts generating the second power supply voltage VP2 (fourth time t4).

[0066] It is understandable that when the power supply voltage generated by the driving module changes, the power supply voltage within the display panel 100 will also change accordingly. In this embodiment of the invention, the next driving module can start generating power supply voltage only after the previous driving module has completed its voltage change, that is, after the power supply voltage within the display panel 100 has changed and stabilized, in order to avoid voltage conflicts.

[0067] Further, see Figure 5 and Figure 6 , Figure 6 for Figure 1 In another corresponding timing diagram, when switching from the second mode M2 ​​to the first mode M1, the interval between the time when the first driving module 200 starts generating the first power supply voltage VP1 (second time t2) and the time when the second driving module 300 starts generating the first power supply voltage VP1 (first time t1) is Δt1, where Δt1 < 2 × F1, and F1 is one frame time corresponding to the first mode M1. When switching from the first mode M1 to the second mode M2, the interval between the time when the second driving module 300 starts generating the second power supply voltage VP2 (fifth time t5) and the time when the first driving module 200 starts generating the second power supply voltage VP2 (fourth time t4) is Δt2, where Δt2 < 2 × F2, and F2 is one frame time corresponding to the second mode M2.

[0068] This avoids the subsequent driving module generating power voltage too late, thus preventing the display panel 100 from relying on the previous driving module to provide the required power voltage for a long time in the latter mode, and enabling the power supply to switch quickly.

[0069] It is understandable that after the subsequent driving module starts generating power voltage, the display panel 100 will change from receiving only the power voltage provided by the previous driving module to receiving the power voltage provided by both the previous and subsequent driving modules. In order to avoid the change in the signal receiving state of the display panel 100 from affecting the display, in this embodiment of the invention, the time when the subsequent driving module generates power voltage can be within the blank time period b.

[0070] That is, when switching from the second mode M2 ​​to the first mode M1, the time when the first drive module 200 generates the first power supply voltage VP1 is within the blank period b, and when switching from the first mode M1 to the second mode M2, the time when the second drive module 300 generates the second power supply voltage VP2 is also within the blank period b.

[0071] For example, see Figure 5 When switching from the second mode M2 ​​to the first mode M1, the voltage jump of the second drive module 300 and the start of power supply voltage generation of the first drive module 200 both occur within the first blank period b1. When switching from the first mode M1 to the second mode M2, the voltage jump of the first drive module 200 and the start of power supply voltage generation of the second drive module 300 both occur within the second blank period b2.

[0072] Or see Figure 6 When switching from the second mode M2 ​​to the first mode M1, the time when the first driving module 200 starts generating power supply voltage can also be within a blank period b after the first effective display period d in the first mode M1. Similarly, when switching from the first mode M1 to the second mode M2, the time when the second driving module 300 starts generating power supply voltage can also be within a blank period b after the first effective display period d in the second mode M2.

[0073] Of course, see Figure 2 The time it takes for the subsequent drive module to generate power supply voltage and the time it takes for the previous drive module to perform voltage switching can also be the same, meaning that the two operations occur simultaneously.

[0074] In one feasible implementation, see again Figure 5 and Figure 6 When switching from the second mode M2 ​​to the first mode M1, after entering the first mode M1, the second driving module 300 stops generating the first power supply voltage VP1. The interval between the time the second driving module 300 stops generating the first power supply voltage VP1 (third time t3) and the time of entering the first mode M1 is Δt3, where Δt3 > 3 × F1, and F1 is one frame time corresponding to the first mode M1. When switching from the first mode M1 to the second mode M2, after entering the second mode M2, the first driving module 200 stops generating the second power supply voltage VP2. The interval between the time the first driving module 200 stops generating the second power supply voltage VP2 (sixth time t6) and the time of entering the second mode M2 ​​is Δt4, where Δt4 > 3 × F2, and F2 is one frame time corresponding to the second mode M2.

[0075] This allows the display panel 100 to receive a stable power supply voltage from the subsequent driving module before shutting off the power supply voltage generated by the previous driving module, thus minimizing abnormal fluctuations in the power supply voltage within the display panel 100.

[0076] In addition, Δt3 and Δt4 can further satisfy: Δt3 < 6 × F1, Δt4 < 6 × F2, to avoid turning off the power supply voltage generated by the previous drive module too late, resulting in wasted power consumption.

[0077] It is understandable that after the previous driving module stops generating power voltage, the display panel 100 will change from receiving power voltages provided by both the previous and subsequent driving modules to receiving power voltages provided by only the subsequent driving module. In order to avoid the change in the signal receiving state of the display panel 100 from affecting the display, in this embodiment of the invention, the time when the previous driving module stops generating power voltage can also be within the blank time period b.

[0078] That is, see Figure 5 and Figure 6 When switching from the second mode M2 ​​to the first mode M1, the second drive module 300 stops generating the first power supply voltage VP1 during the blank period b. When switching from the first mode M1 to the second mode M2, the first drive module 200 stops generating the second power supply voltage VP2 during the blank period b.

[0079] In one feasible implementation, see again Figure 4 The driving process of the display panel 100 includes a blank period b and an effective display period d.

[0080] When switching from the second mode M2 ​​to the first mode M1, during the first blank period b1, the second switch 500 is off and the first switch 400 is on. The first blank period b1 is located between the last valid display period d in the second mode M2 ​​and the first valid display period d in the first mode M1. When switching from the first mode M1 to the second mode M2, during the second blank period b2, the first switch 400 is off and the second switch 500 is on. The second blank period b2 is located between the last valid display period d in the first mode M1 and the first valid display period d in the second mode M2.

[0081] As mentioned earlier, when switching from one mode to another, it is necessary to control the switch connected to the previous drive module to be turned off and the switch connected to the next drive module to be turned on. This implementation method is carried out by changing the state of the two switches during the blank period b between the last valid display period d in the previous mode and the first valid display period d in the next mode. This ensures that all valid display periods d in both modes can receive their respective required power supply voltages, and under the premise of overcoming display abnormalities, the normal display of the two modes is not affected.

[0082] In one feasible implementation, see again Figure 4 When switching from the second mode M2 ​​to the first mode M1, the first switch 400 turns on simultaneously with the second switch 500 turning off. Conversely, when switching from the first mode M1 to the second mode M2, the second switch 500 turns on simultaneously with the first switch 400 turning off. See [link to relevant documentation]. Figure 3 The conduction levels of the first switch 400 and the second switch 500 can be set to opposite values, and the first switch 400 and the second switch 500 can be connected to the same control signal line SW.

[0083] In this way, while cutting off the signal transmission path between the previous driving module and the display panel 100, the signal transmission path between the next driving module and the display panel 100 can be connected simultaneously, thereby minimizing the switching time interval between the two driving modules.

[0084] In one feasible implementation, such as Figure 7 As shown, Figure 7 for Figure 3 In another corresponding timing diagram, when switching from the second mode M2 ​​to the first mode M1, before entering the first mode M1, the first driving module 200 starts generating the first power supply voltage VP1. The interval between the time when the first driving module 200 starts generating the first power supply voltage VP1 (seventh moment t7) and the time of entering the first mode M1 is Δt5, where F2 < Δt5 < 2 × F2, and F2 is one frame time corresponding to the second mode M2. When switching from the first mode M1 to the second mode M2, before entering the second mode M2, the second driving module 300 starts generating the second power supply voltage VP2. The interval between the time when the second driving module 300 starts generating the second power supply voltage VP2 (ninth moment t9) and the time of entering the second mode M2 ​​is Δt6, where F1 < Δt6 < 2 × F1, and F1 is one frame time corresponding to the first mode M1.

[0085] When switching from one mode to another, in order to save power consumption, the next driving module does not need to start generating the power supply voltage required for the next mode too early, but only 1 to 2 frames in advance.

[0086] In one feasible implementation, see again Figure 7 When switching from the second mode M2 ​​to the first mode M1, after the second switch 500 is turned off, the second drive module 300 stops generating the second power supply voltage VP2. When switching from the first mode M1 to the second mode M2, after the first switch 400 is turned off, the first drive module 200 stops generating the first power supply voltage VP1.

[0087] This avoids the previous drive module stopping generating power voltage before the switch connected to it is turned off, thus ensuring the continuity of voltage transmission from the drive module to the display panel 100.

[0088] In one feasible implementation, the first mode M1 includes an Always On Display (AOD) mode, and the second mode M2 ​​includes a regular display mode. In this case, the first driving module 200 can be a Display Driver Integrated Circuit (DDIC), and the second driving module 300 can be a Power Management Integrated Circuit (PMIC). In AOD mode, the internal power supply of the DDIC is used to provide power voltage to the display panel 100, which can save power consumption.

[0089] Furthermore, the first power supply voltage VP1 and the second power supply voltage VP2 can be different. For example, when the first mode M1 includes an AOD mode, the amplitude of the first power supply voltage VP1 can be set to be smaller to further save power consumption.

[0090] Furthermore, the display panel typically includes positive and negative power lines. The positive power lines are connected to the pixel circuitry, and the negative power lines are connected to the cathode of the light-emitting element. Therefore, the first power supply voltage VP1 may include a first positive power supply voltage ELVDD and / or a first negative power supply voltage ELVSS, and the second power supply voltage VP2 may include a second positive power supply voltage U_ELVDD and / or a second negative power supply voltage U_ELVSS. The first positive power supply voltage ELVDD and the second positive power supply voltage U_ELVDD are used to write to the positive power lines, and the first negative power supply voltage ELVSS and the second negative power supply voltage U_ELVSS are used to write to the negative power lines.

[0091] Based on this, such as Figure 8 As shown, Figure 8This is another schematic diagram of the display device provided in an embodiment of the present invention. The first driving module 200 includes a first port 601 for outputting a first positive power supply voltage ELVDD and a second port 602 for outputting a first negative power supply voltage ELVSS. The first switch 400 includes a first sub-switch 401 and a second sub-switch 402, with the first sub-switch 401 connected to the first port 601 and the second sub-switch 402 connected to the second port 602. The second driving module 300 includes a third port 603 for outputting a second positive power supply voltage U_ELVDD and a fourth port 604 for outputting a second negative power supply voltage U_ELVSS. The second switch 500 includes a third sub-switch 501 and a fourth sub-switch 502, with the third sub-switch 501 connected to the third port 603 and the fourth sub-switch 502 connected to the fourth port 604.

[0092] When switching from the second mode M2 ​​to the first mode M1, the first drive module 200 generates a first power supply voltage VP1, controls the third sub-switch 501 and the fourth sub-switch 502 to be turned off, and controls the first sub-switch 401 and the second sub-switch 402 to be turned on. The time when the first drive module 200 starts generating the first power supply voltage VP1 is earlier than the time when the first sub-switch 401 and the second sub-switch 402 are turned on.

[0093] When switching from the first mode M1 to the second mode M2, the second drive module 300 generates a second power supply voltage VP2, controls the first sub-switch 401 and the second sub-switch 402 to be turned off, and controls the third sub-switch 501 and the fourth sub-switch 502 to be turned on. The second drive module 300 starts generating the second power supply voltage VP2 earlier than the time when it controls the third sub-switch 501 and the fourth sub-switch 502 to be turned on.

[0094] Based on the same inventive concept, embodiments of the present invention also provide a display device, combined with Figure 1 and Figure 2 The display device includes a display panel 100, a first driving module 200, and a second driving module 300. The display panel 100 writes a first power supply voltage VP1 in a first mode M1 and a second power supply voltage VP2 in a second mode M2. The first driving module 200 is coupled to the display panel 100 and generates the first power supply voltage VP1 at least in the first mode M1; it is also coupled to the display panel 100 and generates the second power supply voltage VP2 at least in the second mode M2.

[0095] When switching from the second mode M2 ​​to the first mode M1, the power supply voltage generated by the second drive module 300 jumps from the second power supply voltage VP2 to the first power supply voltage VP1, and the first drive module 200 generates the first power supply voltage VP1. The time when the first drive module 200 starts generating the first power supply voltage VP1 is no earlier than the time when the second drive module 300 starts generating the first power supply voltage VP1. After the first drive module 200 generates the first power supply voltage VP1, the second drive module 300 stops generating the first power supply voltage VP1.

[0096] When switching from the first mode M1 to the second mode M2, the power supply voltage generated by the first driving module 200 changes from the first power supply voltage VP1 to the second power supply voltage VP2, and the second driving module 300 generates the second power supply voltage VP2. The time when the second driving module 300 starts generating the second power supply voltage VP2 is no earlier than the time when the first driving module 200 starts generating the second power supply voltage VP2. After the second driving module 300 generates the second power supply voltage VP2, the first driving module 200 stops generating the second power supply voltage VP2.

[0097] The working principle of the display device has been described in detail in the above embodiments and will not be repeated here. Based on the foregoing analysis, when switching from one mode to another, the display device does not directly shut off the power signal generated by the previous driving module. Instead, it causes the power signal generated by the previous driving module to jump from the power voltage required by the previous mode to the power voltage required by the next mode. Simultaneously or subsequently, the next driving module also begins to generate the power voltage required by the next mode. After this, the power signal generated by the previous driving module is shut off. This switching method, by delaying the shutdown of the power signal generated by the previous driving module, achieves seamless switching between the previous and next driving modules, eliminating abnormal fluctuations in the power voltage within the display panel 100, and thus effectively solving the display abnormality problem during switching.

[0098] Based on the same inventive concept, embodiments of the present invention also provide a display device, combined with Figure 3 and Figure 4 The display device includes a display panel 100, a first driving module 200, and a second driving module 300. The display panel 100 writes a first power supply voltage VP1 in a first mode M1 and a second power supply voltage VP2 in a second mode M2. The first driving module 200 is connected to the display panel 100 via a first switch 400 and generates the first power supply voltage VP1 at least in the first mode M1. The second driving module 300 is connected to the display panel 100 via a second switch 500 and generates the second power supply voltage VP2 at least in the second mode M2.

[0099] When switching from the second mode M2 ​​to the first mode M1, the first drive module 200 generates the first power supply voltage VP1, the second switch 500 is turned off, and the first switch 400 is turned on. The first drive module 200 starts generating the first power supply voltage VP1 earlier than the time when the first switch 400 is turned on.

[0100] When switching from the first mode M1 to the second mode M2, the second drive module 300 generates the second power supply voltage VP2, the first switch 400 is turned off, and the second switch 500 is turned on. The second drive module 300 starts generating the second power supply voltage VP2 earlier than the time when the second switch 500 is turned on.

[0101] The working principle of the display device has been described in detail in the above embodiments and will not be repeated here. Based on the foregoing analysis, using the display device provided in this embodiment of the invention, when switching from one mode to another, before turning on the switch connected to the next driving module, the device preemptively generates the power supply voltage required for the next mode. This allows the power supply voltage required for the next mode to be transmitted in advance on the signal transmission path between the next driving module and the switch. Therefore, when the switch is subsequently turned on, the power supply voltage can be transmitted to the display panel 100 more quickly, shortening the time interval that may exist during power switching. This effectively improves the voltage fluctuation and display abnormality problems caused by long time intervals in the prior art.

[0102] Furthermore, see again Figure 8 The conduction level of the first switch 400 is opposite to that of the second switch 500. The first switch 400 and the second switch 500 are electrically connected to the same control signal line SW. The control signal line SW is used to provide the conduction level and the cutoff level. Furthermore, the control signal line SW can be connected to the first drive module 200 (DDIC).

[0103] This allows for the simultaneous connection of the signal transmission path between the preceding drive module and the display panel 100 while simultaneously cutting off the signal transmission path between the following drive module and the display panel 100, minimizing the switching time interval between the two drive modules. Furthermore, connecting the first switch 400 and the second switch 500 to the same control signal line also saves on the number of signal lines.

[0104] Of course, in other optional embodiments of the present invention, such as Figure 9 and Figure 10 As shown, Figure 9 This is another structural schematic diagram of the display device provided in an embodiment of the present invention. Figure 10 for Figure 9In one timing diagram, the first switch 400 and the second switch 500 can each be connected to different control signal lines. Specifically, the first switch 400 is connected to the first control signal line SW1, and the second switch 500 is connected to the second control signal line SW2. This allows for flexible selection of the device types of the first switch 400 and the second switch 500, as well as the on / off times of the first switch 400 and the second switch 500.

[0105] In one feasible implementation, in order to reasonably set the switch positions, the first switch 400 and the second switch 500 can be set in the non-display area of ​​the display panel 100, for example, in the lower step area. In this case, the first switch 400 and the second switch 500 can be transistor structures.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A driving method for a display device, characterized in that, The display device includes: The display panel writes a first power supply voltage in a first mode and a second power supply voltage in a second mode. A first driving module, coupled to the display panel, generates the first power supply voltage at least in the first mode; The second driving module is coupled to the display panel and generates the second power supply voltage at least in the second mode; The driving method includes: When switching from the second mode to the first mode, the power supply voltage generated by the second driving module is switched from the second power supply voltage to the first power supply voltage, and the first driving module is made to generate the first power supply voltage. The time when the first driving module starts to generate the first power supply voltage is no earlier than the time when the second driving module starts to generate the first power supply voltage. After the first driving module generates the first power supply voltage, the second driving module stops generating the first power supply voltage. When switching from the first mode to the second mode, the power supply voltage generated by the first driving module is switched from the first power supply voltage to the second power supply voltage, and the second driving module is made to generate the second power supply voltage. The time when the second driving module starts generating the second power supply voltage is no earlier than the time when the first driving module starts generating the second power supply voltage. After the second driving module generates the second power supply voltage, the first driving module stops generating the second power supply voltage.

2. The driving method for the display device according to claim 1, characterized in that, The driving process of the display panel includes an effective display period and a blank period; When switching from the second mode to the first mode, the second driving module generates the first power supply voltage during a first blank period, wherein the first blank period is located between the last effective display period in the second mode and the first effective display period in the first mode; When switching from the first mode to the second mode, the first driving module generates the second power supply voltage during a second blank period, wherein the second blank period is located between the last effective display period in the first mode and the first effective display period in the second mode.

3. The driving method for the display device according to claim 1, characterized in that, When switching from the second mode to the first mode, the time when the first drive module starts generating the first power supply voltage is later than the time when the second drive module starts generating the first power supply voltage. When switching from the first mode to the second mode, the second drive module starts generating the second power supply voltage later than the first drive module starts generating the second power supply voltage.

4. The driving method for the display device according to claim 3, characterized in that, When switching from the second mode to the first mode, the interval between the time when the first drive module starts generating the first power supply voltage and the time when the second drive module starts generating the first power supply voltage is Δt1, where Δt1 < 2. F1, where F1 is the frame time corresponding to the first mode; When switching from the first mode to the second mode, the interval between the time when the second drive module starts generating the second power supply voltage and the time when the first drive module starts generating the second power supply voltage is Δt2, where Δt2 < 2. F2, where F2 is the frame time corresponding to the second mode.

5. The driving method for the display device according to claim 1, characterized in that, When switching from the second mode to the first mode, after entering the first mode, the second drive module stops generating the first power supply voltage, and the interval between the time when the second drive module stops generating the first power supply voltage and the time when entering the first mode is Δt3, where Δt3 > 3. F1, where F1 is the frame time corresponding to the first mode; When switching from the first mode to the second mode, after entering the second mode, the first drive module stops generating the second power supply voltage, and the interval between the time when the first drive module stops generating the second power supply voltage and the time when entering the second mode is Δt4, where Δt4 > 3. F2, where F2 is the frame time corresponding to the second mode.

6. The driving method for the display device according to claim 1, characterized in that, The first mode includes AOD mode, and the second mode includes regular display mode.

7. A driving method for a display device, characterized in that, The display device includes: The display panel writes a first power supply voltage in a first mode and a second power supply voltage in a second mode. A first driving module, coupled to the display panel, generates the first power supply voltage at least in the first mode; The second driving module is coupled to the display panel and generates the second power supply voltage at least in the second mode; The first driving module is connected to the display panel via a first switch, and the second driving module is connected to the display panel via a second switch; The driving method includes: When switching from the second mode to the first mode, the first driving module generates the first power supply voltage, controls the second switch to be turned off and controls the first switch to be turned on, wherein the time when the first driving module starts generating the first power supply voltage is earlier than the time when the first switch is turned on. When switching from the first mode to the second mode, the second driving module generates the second power supply voltage, controls the first switch to turn off and controls the second switch to turn on, wherein the second driving module starts generating the second power supply voltage earlier than the time when the second switch is turned on.

8. The driving method for the display device according to claim 7, characterized in that, The driving process of the display panel includes a blank period and an effective display period; When switching from the second mode to the first mode, during the first blank period, the second switch is turned off and the first switch is turned on, wherein the first blank period is located between the last valid display period in the second mode and the first valid display period in the first mode; When switching from the first mode to the second mode, during the second blank period, the first switch is turned off and the second switch is turned on, wherein the second blank period is located between the last valid display period in the first mode and the first valid display period in the second mode.

9. The driving method for the display device according to claim 7, characterized in that, When switching from the second mode to the first mode, the first switch is turned on at the same time as the second switch is turned off; When switching from the first mode to the second mode, the second switch is turned on at the same time as the first switch is turned off.

10. The driving method for the display device according to claim 7, characterized in that, When switching from the second mode to the first mode, the first drive module starts generating the first power supply voltage before entering the first mode, and the interval between the time when the first drive module starts generating the first power supply voltage and the time when entering the first mode is Δt5, where F2 < Δt5 < 2. F2, where F2 is the frame time corresponding to the second mode; When switching from the first mode to the second mode, the second drive module starts generating the second power supply voltage before entering the second mode, and the interval between the time when the second drive module starts generating the second power supply voltage and the time when entering the second mode is Δt6, where F1 < Δt6 < 2. F1, where F1 is the frame time corresponding to the first mode.

11. The driving method for the display device according to claim 7, characterized in that, When switching from the second mode to the first mode, after the second switch is turned off, the second drive module stops generating the second power supply voltage; After the first switch is turned off when switching from the first mode to the second mode, the first drive module stops generating the first power supply voltage.

12. The driving method for the display device according to claim 7, characterized in that, The first mode includes AOD mode, and the second mode includes regular display mode.

13. A display device, characterized in that, include: The display panel writes a first power supply voltage in a first mode and a second power supply voltage in a second mode. A first driving module, coupled to the display panel, generates the first power supply voltage at least in the first mode; The second driving module is coupled to the display panel and generates the second power supply voltage at least in the second mode; When switching from the second mode to the first mode, the power supply voltage generated by the second driving module jumps from the second power supply voltage to the first power supply voltage, and the first driving module generates the first power supply voltage. The time when the first driving module starts generating the first power supply voltage is no earlier than the time when the second driving module starts generating the first power supply voltage. After the first driving module generates the first power supply voltage, the second driving module stops generating the first power supply voltage. When switching from the first mode to the second mode, the power supply voltage generated by the first driving module changes from the first power supply voltage to the second power supply voltage, and the second driving module generates the second power supply voltage. The time when the second driving module starts generating the second power supply voltage is no earlier than the time when the first driving module starts generating the second power supply voltage. After the second driving module generates the second power supply voltage, the first driving module stops generating the second power supply voltage.

14. A display device, characterized in that, include: The display panel writes a first power supply voltage in a first mode and a second power supply voltage in a second mode. A first driving module is connected to the display panel via a first switch and generates the first power supply voltage at least in the first mode. The second driving module is connected to the display panel via a second switch and generates the second power supply voltage at least in the second mode. When switching from the second mode to the first mode, the first drive module generates the first power supply voltage, the second switch is turned off, and the first switch is turned on. The time when the first drive module starts generating the first power supply voltage is earlier than the time when the first switch is turned on. When switching from the first mode to the second mode, the second drive module generates the second power supply voltage, the first switch is turned off, and the second switch is turned on. The second drive module starts generating the second power supply voltage earlier than the time when the second switch is turned on.

15. The display device according to claim 14, characterized in that, The conduction level of the first switch is opposite to that of the second switch, and the first switch and the second switch are electrically connected to the same control signal line.

16. The display device according to claim 14, characterized in that, The first switch and the second switch are located in the non-display area of ​​the display panel.

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