Display device and driving method thereof

Abstract

The present invention discloses a display device and a driving method thereof. The display device includes: a display panel, a display driver module, and a power module. The power module is connected to the display panel, which is in turn connected to the display driver module, which is in turn connected to the display panel. The power module is configured to provide a first power supply voltage to the display panel, and the display driver module is configured to adjust the maximum gamma voltage and / or the minimum gamma voltage based on changes in the first power supply voltage. The present invention effectively solves the problem of noticeable brightness flickering on the display panel during mode switching.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display device and a driving method thereof. Background Art

[0002] With the continuous development of display technology, display devices are more and more widely used in life. When displaying, the display device needs to switch between different working modes. However, existing display devices have the problem of switching flickering at the moment of mode switching. Summary of the Invention

[0003] The present invention provides a display device and a driving method thereof, so as to solve the problem of switching flickering when the existing display device switches modes.

[0004] In a first aspect, the present invention provides a display device, comprising: a display panel, a display driving module, and a power supply module;

[0005] The power module is connected to the display panel, the power module is connected to the display driver module, and the display driver module is connected to the display panel;

[0006] The power supply module is used to provide a first power supply voltage to the display panel, and the display driving module is used to adjust the maximum gamma voltage and / or the minimum gamma voltage according to the variation of the first power supply voltage.

[0007] Optionally, the operating mode of the display panel includes a first operating mode and a second operating mode; the power supply module is used to provide a second power supply voltage to the display driver module; the display driver module is used to generate a first minimum gamma voltage and a first maximum gamma voltage according to the second power supply voltage in the first operating mode;

[0008] and / or the display driver module is configured to generate a maximum gamma voltage compensation value based on a difference between the second minimum gamma voltage and the first minimum gamma voltage and a change in the first power supply voltage when switching from the first operating mode to the second operating mode, and generate a second maximum gamma voltage based on at least one of the second power supply voltage and the first maximum gamma voltage and the maximum gamma voltage compensation value;

[0009] and / or, the display driving module is configured to generate a second minimum gamma voltage according to the second power supply voltage in the second operating mode;

[0010] The first minimum gamma voltage is the minimum gamma voltage generated by the display driving module in the first operating mode, and the first maximum gamma voltage is the maximum gamma voltage generated by the display driving module in the first operating mode; the second minimum gamma voltage is the minimum gamma voltage generated by the display driving module in the second operating mode, and the second maximum gamma voltage is the maximum gamma voltage generated by the display driving module in the second operating mode.

[0011] Optionally, the operating mode of the display panel includes a first operating mode and a second operating mode;

[0012] The first power supply voltage output by the power supply module in the second working mode is greater than the first power supply voltage output by the power supply module in the first working mode, and the second maximum gamma voltage generated by the display driving module in the second working mode is greater than the first maximum gamma voltage generated by the display driving module in the first working mode;

[0013] and / or, the first power supply voltage output by the power supply module in the second operating mode is lower than the first power supply voltage output by the power supply module in the first operating mode, and the second maximum gamma voltage generated by the display driving module in the second operating mode is lower than the first maximum gamma voltage generated by the display driving module in the first operating mode;

[0014] and / or, the first power supply voltage output by the power supply module in the second operating mode is greater than the first power supply voltage output by the power supply module in the first operating mode, and the second minimum gamma voltage generated by the display driving module in the second operating mode is greater than the first minimum gamma voltage generated by the display driving module in the first operating mode;

[0015] and / or, the first power supply voltage output by the power supply module in the second operating mode is lower than the first power supply voltage output by the power supply module in the first operating mode, and the second minimum gamma voltage generated by the display driving module in the second operating mode is lower than the first minimum gamma voltage generated by the display driving module in the first operating mode;

[0016] And / or, the maximum gamma voltage and the minimum gamma voltage are adjusted according to the variation of the first power voltage to satisfy the following relationship:

[0017]

[0018] Wherein, △VGMP represents the maximum gamma voltage compensation value, △ELVDD represents the change in the first power supply voltage, △VGSP represents the minimum gamma voltage compensation value, data represents gamma data, and N represents the number of bits of gamma data;

[0019] and / or, the brightness level of the first operating mode is different from the brightness level of the second operating mode;

[0020] and / or, the refresh frequency of the first operating mode is different from the refresh frequency of the second operating mode;

[0021] Preferably, the brightness level of the first working mode is lower than the brightness level of the second working mode; or, the brightness level of the first working mode is higher than the brightness level of the second working mode;

[0022] Preferably, when the first operating mode is switched to the second operating mode, the gamma data generated by the display driving module remains unchanged.

[0023] Optionally, the operating mode of the display panel includes a first operating mode and a second operating mode; the power supply module is used to provide a second power supply voltage to the display driving module;

[0024] The display driving module is configured to generate a first minimum gamma voltage and a first maximum gamma voltage according to the second power supply voltage in a first operating mode;

[0025] and / or the display driver module is configured to generate a minimum gamma voltage compensation value based on a difference between the second maximum gamma voltage and the first maximum gamma voltage and a change in the first power supply voltage when switching from the first operating mode to the second operating mode, and generate a second minimum gamma voltage based on at least one of the second power supply voltage and the first minimum gamma voltage and the minimum gamma voltage compensation value;

[0026] and / or, the display driving module is configured to generate a second maximum gamma voltage according to the second power supply voltage in the second operating mode;

[0027] The first minimum gamma voltage is the minimum gamma voltage generated by the display driving module in the first operating mode, and the first maximum gamma voltage is the maximum gamma voltage generated by the display driving module in the first operating mode; the second maximum gamma voltage is the maximum gamma voltage generated by the display driving module in the second operating mode, and the second minimum gamma voltage is the minimum gamma voltage generated by the display driving module in the second operating mode.

[0028] Optionally, the display driving module includes: a first voltage acquisition unit, a first voltage conversion unit and a first voltage compensation unit;

[0029] The first voltage acquisition unit is connected to the first power supply voltage and is used to obtain a change in the first power supply voltage;

[0030] The first voltage conversion unit is connected to the power module, the first voltage conversion unit is connected to the first voltage compensation unit, and the first voltage conversion unit is used to generate a first minimum gamma voltage, a second minimum gamma voltage and a first maximum gamma voltage according to the second power voltage;

[0031] The first voltage compensation unit is connected to the first voltage acquisition unit, and is configured to generate a maximum gamma voltage compensation value according to a change in the first power supply voltage and a difference between the second minimum gamma voltage and the first minimum gamma voltage;

[0032] The first voltage conversion unit is configured to generate a second maximum gamma voltage according to at least one of the second power voltage and the first maximum gamma voltage, and a maximum gamma voltage compensation value.

[0033] Optionally, the display driving module includes: a second voltage acquisition unit, a second voltage conversion unit, and a second voltage compensation unit;

[0034] The second voltage acquisition unit is connected to the first power supply voltage and is used to obtain a change in the first power supply voltage;

[0035] The second voltage conversion unit is connected to the power module, the second voltage conversion unit is connected to the second voltage compensation unit, and the second voltage conversion unit is used to generate a first maximum gamma voltage, a second maximum gamma voltage and a first minimum gamma voltage according to the second power voltage;

[0036] The second voltage compensation unit is connected to the second voltage acquisition unit, and is configured to generate a minimum gamma voltage compensation value according to a change in the first power supply voltage and a difference between the second maximum gamma voltage and the first maximum gamma voltage;

[0037] The second voltage conversion unit is configured to generate a second minimum gamma voltage according to at least one of the second power voltage and the first minimum gamma voltage, and a minimum gamma voltage compensation value.

[0038] Optionally, generating the maximum gamma voltage compensation value according to the difference between the second minimum gamma voltage and the first minimum gamma voltage and the change in the first power supply voltage when switching from the first operating mode to the second operating mode includes:

[0039]

[0040] Wherein, ΔVGMP represents the maximum gamma voltage compensation value, ΔELVDD represents the variation of the first power supply voltage, ΔVGSP0 represents the difference between the second minimum gamma voltage and the first minimum gamma voltage, data represents gamma data, and N represents the number of bits of the gamma data.

[0041] Optionally, generating the minimum gamma voltage compensation value according to the difference between the second maximum gamma voltage and the first maximum gamma voltage and the change in the first power supply voltage when switching from the first operating mode to the second operating mode includes:

[0042]

[0043] Wherein, ΔVGSP represents the minimum gamma voltage compensation value, ΔVGMP0 represents the difference between the second maximum gamma voltage and the first maximum gamma voltage, ΔELVDD represents the variation of the first power supply voltage, data represents gamma data, and N represents the number of bits of the gamma data.

[0044] In a second aspect, the present invention provides a display device, wherein the display device includes: a display panel and a display driving module;

[0045] The display driver module is connected to the display panel;

[0046] The display driving module is used to adjust the minimum gamma voltage according to the variation of the maximum gamma voltage, or to adjust the maximum gamma voltage according to the variation of the minimum gamma voltage.

[0047] In a third aspect, the present invention provides a method for driving a display device, wherein the display device includes a display panel, a display driver module, and a power module; the power module is connected to the display panel, the power module is connected to the display driver module, and the display driver module is connected to the display panel;

[0048] Drive methods include:

[0049] The power supply module provides a first power supply voltage to the display panel;

[0050] The display driving module adjusts the maximum gamma voltage and / or the minimum gamma voltage according to the variation of the first power voltage.

[0051] According to the technical solution of the embodiment of the present invention, a display driver module is connected to a first power supply voltage, and a change in the first power supply voltage is calculated in real time. A maximum gamma voltage compensation value is calculated based on the change in the first power supply voltage, and / or a minimum gamma voltage compensation value is calculated based on the change in the first power supply voltage, thereby adjusting the maximum gamma voltage and / or the minimum gamma voltage generated by the display driver module, thereby solving the problem of brightness flicker caused at the moment of mode switching.

[0052] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0054] Figure 1 is a schematic structural diagram of a display device provided by an embodiment of the present invention;

[0055] Figure 2 is a structural schematic diagram of a pixel circuit provided by an embodiment of the present invention;

[0056] Figure 3 is a schematic structural diagram of another display device provided by an embodiment of the present invention;

[0057] Figure 4 is a structural schematic diagram of another display device provided by an embodiment of the present invention;

[0058] Figure 5 is a structural schematic diagram of another display device provided by an embodiment of the present invention;

[0059] Figure 6 is a structural schematic diagram of another display device provided by an embodiment of the present invention;

[0060] Figure 7 is a flow chart of a method for driving a display device provided by an embodiment of the present invention;

[0061] Figure 8 is a flow chart of another method for driving a display device provided by an embodiment of the present invention;

[0062] Figure 9 This is a flowchart of another method for driving a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0063] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0064] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0065] The display device may include a display panel, a display driver module and a power module. The display driver module may include a display driver integrated circuit (DDIC). The power module may provide the voltage required for operation to the display driver module and the display panel. The driving of the display panel is mainly completed by the display driver module and the power module, wherein the display driver module may be connected to the data line on the display panel to output a data voltage signal to the data line. The data voltage is related to the maximum gamma voltage, the minimum gamma voltage and the gamma data (gamma value). The power module may provide a DC power supply voltage (ELVDD) to the display panel. It can be seen that the data voltage and DC power supply voltage received by the display panel come from different power supply systems or power supply architectures. The display driving current provided by the pixel circuit of the display panel to the light-emitting element is related to the data voltage and the DC power supply voltage. At the moment when the display panel switches the display mode, the DC power supply voltage provided to the display panel by the power modules corresponding to different modes is set differently. Due to the working timing, the gamma value remains unchanged at the moment of mode switching. Therefore, the change of the DC power supply voltage at the moment of display mode switching will cause an abnormal change in the display driving current, thereby causing the display panel to have an abnormal brightness flicker problem. That is, when the display panel switches display modes, the gamma value and the change in DC power supply voltage do not match. As a result, when the DC power supply voltage changes at the moment of mode switching, the display panel exhibits obvious brightness flickering. In order to solve the above technical problems, the technical solutions of the embodiments of the present invention are as follows:

[0066] Figure 1 is a structural diagram of a display device provided by an embodiment of the present invention, such as Figure 1 As shown, the display device includes: a display panel 1, a display driver module 2, and a power module 3. The power module 3 is connected to the display panel 1, which is in turn connected to the display driver module 2, which is in turn connected to the display panel 1. The power module 3 is configured to provide a first power supply voltage ELVDD to the display panel 1. The display driver module 2 is configured to receive the first power supply voltage ELVDD and determine a change in the first power supply voltage ELVDD, and / or to adjust the maximum gamma voltage VGMP and / or the minimum gamma voltage VGSP based on the change in the first power supply voltage ELVDD.

[0067] Specifically, Figure 2 is a structural diagram of a pixel circuit provided by an embodiment of the present invention, such as Figure 2As shown, the first terminal of the fourth transistor T4 in the pixel circuit is connected to the first initialization signal Vref1, the second terminal of the fourth transistor T4 is connected to the control terminal of the first transistor T1, and the control terminal of the fourth transistor T4 is connected to the first scan signal S1. The third transistor T3 is connected between the control terminal and the second terminal of the first transistor T1, and the control terminal of the third transistor T3 is connected to the second scan signal S2. The first terminal of the fifth transistor T5 is connected to the second initialization signal Vref2, the second terminal of the fifth transistor T5 is connected to the first electrode (e.g., the anode) of the light-emitting element D1, and the control terminal of the fifth transistor T5 is connected to the third scan signal S3. The first terminal of the second transistor T2 is connected to the data voltage Vdata, the second terminal of the second transistor T2 is connected to the first terminal of the first transistor T1, and the control terminal of the second transistor T2 is connected to the second scan signal S2. The first terminal of the sixth transistor T6 is connected to the first power supply voltage ELVDD, the second terminal of the sixth transistor T6 is connected to the first terminal of the first transistor T1, and the control terminal of the sixth transistor T6 is connected to the light-emitting control signal EM. The first terminal of the seventh transistor T7 is connected to the second terminal of the first transistor T1. The second terminal of the seventh transistor T7 is connected to the first electrode (e.g., anode) of the light-emitting element D1. The gate of the seventh transistor T7 is connected to the light-emitting control signal EM. The second electrode (e.g., cathode) of the light-emitting element D1 is connected to the fourth power supply voltage ELVSS. The first capacitor C1 is connected between the first power supply voltage ELVDD and the control terminal of the first transistor T1. During the light-emitting phase, a path is formed between the first power supply voltage ELVDD and the fourth power supply voltage ELVSS. The drive current output by the first transistor T1 drives the light-emitting element D1 to emit light normally, thereby achieving image display.

[0068] like Figure 1 and Figure 2 As shown, the display panel 1 includes a pixel circuit. The pixel circuit in the display panel 1 can be Figure 2 The pixel circuit structure of 7T1C is shown. In some embodiments of the present invention, the pixel circuit in the display panel 1 may also be a pixel circuit of any other structure. The pixel circuit may include part or all of the first transistor T1 to the seventh transistor T7.

[0069] The display device may include a mobile phone, a wearable device, a tablet computer, a laptop computer, a car display device, a television, etc. The display driver module 2 may include a driver chip. The power module 3 may include a power chip.

[0070] The power supply module 3 can provide a first power supply voltage ELVDD to the pixel circuit and a second power supply voltage VCI to the display driver module 2. The display driver module 2 can generate a maximum gamma voltage VGMP and a minimum gamma voltage VGSP based on the second power supply voltage VCI. The display driver module 2 then generates a data voltage Vdata based on the maximum gamma voltage VGMP, the minimum gamma voltage VGSP and the gamma data (gamma value) to provide the data voltage Vdata to the pixel circuit of the display panel 1.

[0071] like Figure 1 and Figure 2 As shown, the display panel 1 includes pixel circuits and light-emitting elements D1 arranged in an array, and the display driving current I d The driving current I is output from the pixel circuit to the light emitting element D1 to drive the light emitting element D1 to emit light. d The formula may be different, mainly related to the data voltage Vdata and the first power voltage ELVDD.

[0072] In an optional embodiment of the present invention, the display driving current I of the display panel 1 is d The calculation formula can be:

[0073] I d =k(Vdata-ELVDD) 2

[0074] The calculation formula of the data voltage Vdata is:

[0075]

[0076] Where VGMP is the maximum gamma voltage, NGSP is the minimum gamma voltage, data is the gamma data (gamma value), and N is the number of gamma data bits. Therefore, the data voltage Vdata is related to the maximum gamma voltage VGMP, the minimum gamma voltage VGSP, the gamma value, and the number of data bits N.

[0077] The display drive current I can be obtained from the above two calculation formulas d The calculation formula is:

[0078]

[0079] It can be seen that the display driving current I of the display panel 1 d It is related to the first power voltage ELVDD, the maximum gamma voltage VGMP, the minimum gamma voltage VGSP, the gamma value, and the number of data bits N.

[0080] In the embodiment of the present invention, the display driver module 2 may include a DDIC. When the DDIC is fixed, the value of N is fixed. The gamma data (gamma value) is the value determined during the gamma adjustment process. It can be seen that the driving current I of the display panel 1 is affected by the gamma data. d The factors of ΔV are the first power voltage ELVDD, the maximum gamma voltage VGMP and the minimum gamma voltage VGSP.

[0081] At the moment when the display panel 1 switches the display mode, the voltage settings provided by the power module 3 to the display panel 1 are different in different modes, which may cause the first power supply voltage ELVDD to change during the mode switching process, or the power module 3 may be subject to external interference, causing the first power supply voltage ELVDD provided to the display panel 1 to change. However, due to the working sequence, the gamma value does not change to match the first power supply voltage ELVDD at this time. In order to eliminate the impact of the change of the first power supply voltage ELVDD on the display drive current I d In order to avoid the abnormal influence of the power supply voltage ELVDD, the embodiment of the present invention establishes a linkage relationship between the first power supply voltage ELVDD and the maximum gamma voltage VGMP, and / or a linkage relationship between the first power supply voltage ELVDD and the minimum gamma voltage VGSP.

[0082] The display driver module 2 can be connected to the first power supply voltage ELVDD, thereby establishing a first power supply voltage ELVDD feedback channel, and calculating the change in the first power supply voltage ELVDD in real time, and calculating the maximum gamma voltage compensation value based on the change in the first power supply voltage ELVDD, and / or calculating the minimum gamma voltage compensation value based on the change in the first power supply voltage ELVDD, thereby adjusting the maximum gamma voltage VGMP and / or the minimum gamma voltage VGSP generated by the display driver module 2, that is, adjusting the data voltage Vdata based on the change in the first power supply voltage ELVDD, so that the change in the data voltage Vdata compensates for the change in the first power supply voltage ELVDD. Ensure that when the display panel 1 switches the display mode, when the gamma value remains unchanged but the first power supply voltage ELVDD changes, that is, when the gamma value does not match the change in the first power supply voltage ELVDD, the display drive current I d The value of the first power supply voltage ELVDD remains unchanged, eliminating the effect of the change of the first power supply voltage ELVDD on the display driving current I d abnormal impact.

[0083] According to the technical solution of an embodiment of the present invention, a display driver module receives a first power supply voltage and calculates the change in the first power supply voltage in real time. A maximum gamma voltage compensation value and / or a minimum gamma voltage compensation value are calculated based on the change in the first power supply voltage, thereby adjusting the maximum gamma voltage and / or the minimum gamma voltage generated by the display driver module. Specifically, the data voltage is adjusted based on the change in the first power supply voltage so that the change in the data voltage compensates for the change in the first power supply voltage. This ensures that when the display panel switches display modes, when the gamma value does not match the change in the first power supply voltage, the value of the display driver current remains unchanged, eliminating the abnormal impact of the change in the first power supply voltage on the display driver current. This effectively solves the problem of noticeable brightness flickering on the display panel caused by the mismatch between the gamma value and the change in the first power supply voltage at the moment of mode switching.

[0084] Optionally, based on the above embodiments, continue to refer to Figure 1 , the operating mode of the display panel 1 includes a first operating mode and a second operating mode.

[0085] The power supply module 3 is used to provide the second power supply voltage VCI to the display driving module 2 .

[0086] The display driver module 2 is configured to generate, in a first operating mode, at least one of a first minimum gamma voltage and a first maximum gamma voltage based on the second power supply voltage VCI. Furthermore, the display driver module 2 is configured to generate, based on a difference between the second minimum gamma voltage and the first minimum gamma voltage and a change in the first power supply voltage ELVDD when switching from the first operating mode to the second operating mode, a maximum gamma voltage compensation value, and to generate a second maximum gamma voltage based on at least one of the second power supply voltage VCI and the first maximum gamma voltage, and the maximum gamma voltage compensation value. Furthermore, the display driver module 2 is configured to generate, in a second operating mode, a second minimum gamma voltage based on the second power supply voltage VCI.

[0087] The first minimum gamma voltage is the minimum gamma voltage VGSP generated by the display driver module 2 in the first operating mode, and the first maximum gamma voltage is the maximum gamma voltage VGMP generated by the display driver module 2 in the first operating mode. The second minimum gamma voltage is the minimum gamma voltage VGSP generated by the display driver module 2 in the second operating mode, and the second maximum gamma voltage is the maximum gamma voltage VGMP generated by the display driver module 2 in the second operating mode.

[0088] Specifically, in order to eliminate the mismatch between the gamma value (which remains unchanged at this time) and the change of the first power supply voltage ELVDD at the moment when the display panel 1 switches the display mode, the display driving current I dIn order to avoid the influence of the display panel 1, an embodiment of the present invention establishes a linkage relationship between the first power supply voltage ELVDD and the maximum gamma voltage VGMP. The operating mode of the display panel 1 may include multiple display modes, and the display panel 1 switches between different display modes to achieve the target display effect. Exemplarily, the operating mode of the display panel 1 may include a first operating mode and a second operating mode, and the display panel 1 may switch from the first operating mode to the second operating mode during the display process. The first operating mode may be a normal display mode, and the second operating mode may be a highlight display mode; the first operating mode may also be a highlight display mode, and the second operating mode may also be a normal display mode.

[0089] Optionally, the brightness level of the first operating mode is different from the brightness level of the second operating mode. The brightness level of the first operating mode is higher than the brightness level of the second operating mode, or the brightness level of the first operating mode is lower than the brightness level of the second operating mode. The higher the brightness level (also known as the display brightness value, Display Brightness Value, DBV), the greater the brightness of the maximum grayscale. And / or, at the same grayscale, the higher the brightness level, the greater the display brightness. The brightness level can be adjusted through the brightness adjustment bar of a display device such as a mobile phone.

[0090] Optionally, the refresh frequency of the first working mode is different from the refresh frequency of the second working mode. The refresh frequency of the first working mode is higher than the refresh frequency of the second working mode, or the refresh frequency of the first working mode is lower than the refresh frequency of the second working mode.

[0091] When the display panel 1 operates in the first operating mode, the display driving module 2 generates a first minimum gamma voltage and a first maximum gamma voltage according to the second power supply voltage VCI, and generates a data voltage Vdata to the display panel 1 according to the first minimum gamma voltage, the first maximum gamma voltage and the gamma value corresponding to the first operating mode. At this time, the power supply module 3 also provides the first power supply voltage ELVDD corresponding to the first operating mode to the display panel 1, and the display panel 1 operates normally in the first operating mode.

[0092] At the moment the operating mode of the display panel 1 switches from the first operating mode to the second operating mode, the first power supply voltage ELVDD provided to the display panel 1 by the power supply module 3 changes. The display driving module 2 connects to the first power supply voltage ELVDD in real time and calculates the change in the first power supply voltage ELVDD in real time. At the same time, it calculates the difference between the first minimum gamma voltage corresponding to the first operating mode and the second minimum gamma voltage corresponding to the second operating mode. The maximum gamma voltage compensation value is calculated based on the change in the first power supply voltage ELVDD and the difference between the first minimum gamma voltage and the second minimum gamma voltage. The change in the first power supply voltage ELVDD is compensated by the maximum gamma voltage compensation value. The maximum gamma voltage compensation value is then integrated with the first maximum gamma voltage corresponding to the first operating mode to calculate the second maximum gamma voltage corresponding to the second operating mode, or the second maximum gamma voltage is generated based on the second power supply voltage and the maximum gamma voltage compensation value. This ensures that when the display panel 1 switches the display mode, when the gamma value does not match the change in the first power supply voltage ELVDD, the display driving current I d The value remains unchanged, eliminating the mismatch between the gamma value and the change of the first power supply voltage ELVDD and the display driving current I d The problem of obvious brightness flickering of the display panel 1 at the moment of mode switching of the display panel 1 is effectively solved.

[0093] The second minimum gamma voltage corresponding to the second operating mode may be generated by the display driving module 2 according to the second power supply voltage VCI when the display panel 1 switches modes, or may be a known parameter preset in the display driving module 2 .

[0094] Optionally, based on the above embodiments, at the moment when the operating mode of the display panel 1 switches from the first operating mode to the second operating mode, the display driving module 2 can calculate the maximum gamma voltage compensation value based solely on the change in the first power supply voltage ELVDD, compensate for the change in the first power supply voltage ELVDD using the maximum gamma voltage compensation value, and then integrate the maximum gamma voltage compensation value with the first maximum gamma voltage corresponding to the first operating mode to calculate the second maximum gamma voltage corresponding to the second operating mode, or generate the second maximum gamma voltage based on the second power supply voltage VCI and the maximum gamma voltage compensation value.

[0095] Optionally, the display driver module 2 is configured to generate a maximum gamma voltage compensation value based on a change in the first power supply voltage ELVDD when switching from the first operating mode to the second operating mode, and to generate a second maximum gamma voltage based on at least one of the second power supply voltage VCI and the first maximum gamma voltage, and the maximum gamma voltage compensation value. For example, the second minimum gamma voltage is equal to or has a small difference from the first minimum gamma voltage, which corresponds to the minimum gamma voltage being unchanged or having a small change at the moment of mode switching, e.g., being less than or significantly less than a change in the first power supply voltage ELVDD, and / or the absolute value of the change in the minimum gamma voltage VGSP being less than or significantly less than the absolute value of the change in the first power supply voltage ELVDD.

[0096] Optionally, based on the above embodiments, continue to refer to Figure 1 The operating mode of the display panel 1 includes a first operating mode and a second operating mode. The power supply module 3 is used to provide a second power supply voltage VCI to the display driver module 2. The display driver module 2 is used to generate at least one of a first minimum gamma voltage and a first maximum gamma voltage according to the second power supply voltage VCI in the first operating mode. And / or, the display driver module 2 is used to generate a minimum gamma voltage compensation value according to the difference between the second maximum gamma voltage and the first maximum gamma voltage, and the change in the first power supply voltage ELVDD when switching from the first operating mode to the second operating mode, and generate a second minimum gamma voltage according to at least one of the second power supply voltage VCI and the first minimum gamma voltage, and the minimum gamma voltage compensation value. And / or, the display driver module 2 is used to generate a second maximum gamma voltage according to the second power supply voltage VCI in the second operating mode.

[0097] The first minimum gamma voltage is the minimum gamma voltage VGSP generated by the display driver module 2 in the first operating mode, and the first maximum gamma voltage is the maximum gamma voltage VGMP generated by the display driver module 2 in the first operating mode. The second maximum gamma voltage is the maximum gamma voltage VGMP generated by the display driver module 2 in the second operating mode, and the second minimum gamma voltage is the minimum gamma voltage VGSP generated by the display driver module 2 in the second operating mode.

[0098] Specifically, in order to eliminate the mismatch between the gamma value (which remains unchanged at this time) and the change of the first power supply voltage ELVDD at the moment when the display panel 1 switches the display mode, the display driving current I d In order to avoid the influence of the above, the embodiment of the present invention establishes a linkage relationship between the first power voltage ELVDD and the minimum gamma voltage VGSP.

[0099] When the display panel 1 operates in the first operating mode, the display driver module 2 generates a first minimum gamma voltage and a first maximum gamma voltage based on the second power supply voltage VCI, and generates a data voltage Vdata for the display panel 1 based on the first minimum gamma voltage, the first maximum gamma voltage, and a gamma value corresponding to the first operating mode. At this time, the power supply module 3 also provides the first power supply voltage ELVDD corresponding to the first operating mode to the display panel 1, and the display panel 1 operates normally in the first operating mode.

[0100] At the moment the operating mode of the display panel 1 switches from the first operating mode to the second operating mode, the first power supply voltage ELVDD provided to the display panel 1 by the power supply module 3 changes. The display driver module 2 connects to the first power supply voltage ELVDD in real time and calculates the change in the first power supply voltage ELVDD in real time. It also calculates the difference between the first maximum gamma voltage corresponding to the first operating mode and the second maximum gamma voltage corresponding to the second operating mode. A minimum gamma voltage compensation value is calculated based on the change in the first power supply voltage ELVDD and the difference between the first maximum gamma voltage and the second maximum gamma voltage. The change in the first power supply voltage ELVDD is compensated for using the minimum gamma voltage compensation value. The minimum gamma voltage compensation value is then integrated with the first minimum gamma voltage corresponding to the first operating mode to calculate a second minimum gamma voltage corresponding to the second operating mode. Alternatively, a second minimum gamma voltage is generated based on the second power supply voltage VCI and the minimum gamma voltage compensation value. This ensures that when the display panel 1 switches display modes, when the gamma value does not match the change in the first power supply voltage ELVDD, the display driver current I d The value remains unchanged, eliminating the mismatch between the gamma value and the change of the first power supply voltage ELVDD and the display driving current I d The problem of obvious brightness flickering of the display panel 1 at the moment of mode switching of the display panel 1 is effectively solved.

[0101] The second maximum gamma voltage corresponding to the second operating mode may be generated by the display driving module 2 according to the second power supply voltage VCI when the display panel 1 switches modes, or may be a known parameter preset in the display driving module 2 .

[0102] Optionally, the display driver module 2 is configured to generate a minimum gamma voltage compensation value based on a change in the first power supply voltage ELVDD when switching from the first operating mode to the second operating mode, and generate a second minimum gamma voltage based on at least one of the second power supply voltage VCI and the first minimum gamma voltage, and the minimum gamma voltage compensation value. For example, the second maximum gamma voltage is equal to or has a small difference from the first maximum gamma voltage, which corresponds to the maximum gamma voltage being unchanged or having a small change at the moment of mode switching, such as being less than or significantly less than a change in the first power supply voltage ELVDD, and / or the absolute value of the change in the maximum gamma voltage VGMP being less than or significantly less than the absolute value of the change in the first power supply voltage ELVDD.

[0103] Optionally, based on the above embodiments, continue to refer to Figure 1 The first power supply voltage ELVDD output by the power supply module 3 in the second operating mode is greater than the first power supply voltage ELVDD output by the power supply module 3 in the first operating mode, and the second maximum gamma voltage generated by the display driver module 2 in the second operating mode is greater than the first maximum gamma voltage generated by the display driver module 2 in the first operating mode. Furthermore, / or the first power supply voltage ELVDD output by the power supply module 3 in the second operating mode is less than the first power supply voltage ELVDD output by the power supply module 3 in the first operating mode, and the second maximum gamma voltage generated by the display driver module 2 in the second operating mode is less than the first maximum gamma voltage generated by the display driver module 2 in the first operating mode. Furthermore, / or the first power supply voltage ELVDD output by the power supply module 3 in the second operating mode is greater than the first power supply voltage ELVDD output by the power supply module 3 in the first operating mode, and the second minimum gamma voltage generated by the display driver module 2 in the second operating mode is greater than the first minimum gamma voltage generated by the display driver module 2 in the first operating mode. Furthermore, / or the first power supply voltage ELVDD output by the power supply module 3 in the second operating mode is less than the first power supply voltage ELVDD output by the power supply module 3 in the first operating mode, and the second minimum gamma voltage generated by the display driver module 2 in the second operating mode is less than the first minimum gamma voltage generated by the display driver module 2 in the first operating mode.

[0104] Specifically, the display driver module 2 can be configured to generate a maximum gamma voltage compensation value based on the change in the first power supply voltage ELVDD and the difference between the second minimum gamma voltage and the first minimum gamma voltage at the moment the first power supply voltage ELVDD increases, and to generate the second maximum gamma voltage by adding the first maximum gamma voltage and the absolute value of the maximum gamma voltage compensation value. The display driver module 2 can also be configured to generate a maximum gamma voltage compensation value based on the change in the first power supply voltage ELVDD and the difference between the second minimum gamma voltage and the first minimum gamma voltage at the moment the first power supply voltage ELVDD decreases, and to generate the second maximum gamma voltage by subtracting the absolute value of the first maximum gamma voltage from the maximum gamma voltage compensation value.

[0105] The display driver module 2 can be configured to generate a minimum gamma voltage compensation value based on the change in the first power supply voltage ELVDD and the difference between the second maximum gamma voltage and the first maximum gamma voltage at the moment of switching from the first operating mode to the second operating mode when the first power supply voltage ELVDD becomes higher, and to generate a second minimum gamma voltage by adding the absolute values ​​of the first minimum gamma voltage and the minimum gamma voltage compensation value. The display driver module 2 can also be configured to generate a second minimum gamma voltage by subtracting the absolute values ​​of the first minimum gamma voltage and the minimum gamma voltage compensation value from each other during the process of switching from the first operating mode to the second operating mode when the first power supply voltage ELVDD becomes lower.

[0106] Specifically, in order to eliminate the mismatch between the gamma value (which remains unchanged at this time) and the change of the first power supply voltage ELVDD at the moment when the display panel 1 switches the display mode, the display driving current I d In order to avoid the influence of the first power supply voltage ELVDD and the maximum gamma voltage VGMP, the embodiment of the present invention establishes a linkage relationship between the first power supply voltage ELVDD and the maximum gamma voltage VGMP. When the operating mode of the display panel 1 switches from the first operating mode to the second operating mode, the first power supply voltage ELVDD provided by the power module 3 to the display panel 1 will change.

[0107] When the first power supply voltage ELVDD becomes higher, the display driving module 2 increases the maximum gamma voltage VGMP to compensate, so that the display driving current I d Remain unchanged.

[0108] When the first power supply voltage ELVDD becomes low, the display driving module 2 will reduce the maximum gamma voltage VGMP to compensate, so that the display driving current I d Remain unchanged.

[0109] In order to eliminate the mismatch between the gamma value (which remains unchanged at this time) and the change of the first power supply voltage ELVDD at the moment when the display panel 1 switches the display mode, the display driving current I d In order to avoid the influence of the first power supply voltage ELVDD and the minimum gamma voltage VGSP, the embodiment of the present invention can also establish a linkage relationship between the first power supply voltage ELVDD and the minimum gamma voltage VGSP. When the operating mode of the display panel 1 switches from the first operating mode to the second operating mode, the first power supply voltage ELVDD provided by the power module 3 to the display panel 1 will change.

[0110] When the first power supply voltage ELVDD becomes higher, the display driving module 2 increases the minimum gamma voltage VGSP to compensate, so that the display driving current I d Remain unchanged.

[0111] When the first power supply voltage ELVDD becomes low, the display driving module 2 will reduce the minimum gamma voltage VGSP to compensate, so that the display driving current I d Remain unchanged.

[0112] Through the above configuration, at the moment when the display panel 1 switches its working mode, the display driving module 2 generates a maximum gamma voltage compensation value and / or a minimum gamma voltage compensation value according to the change of the first power supply voltage ELVDD, adjusts the maximum gamma voltage VGMP to be larger or smaller, and / or adjusts the minimum gamma voltage VGSP to be larger or smaller, and compensates for the change of the first power supply voltage ELVDD by the maximum gamma voltage compensation value and / or the minimum gamma voltage compensation value, thereby ensuring that at the moment when the display panel switches its display mode, when the gamma value does not match the change of the first power supply voltage ELVDD, the display driving current I d The value remains unchanged, eliminating the mismatch between the gamma value and the change of the first power supply voltage ELVDD and the display driving current I d The problem of obvious brightness flickering of the display panel 1 at the moment of mode switching is effectively solved.

[0113] Optionally, based on the above embodiments, continue to refer to Figure 1 , the maximum gamma voltage VGMP and the minimum gamma voltage VGSP are adjusted according to the variation of the first power voltage ELVDD to satisfy the following relationship:

[0114]

[0115] Wherein, ΔVGMP represents the maximum gamma voltage compensation value, ΔELVDD represents the variation of the first power voltage ELVDD, ΔVGSP represents the minimum gamma voltage compensation value, data represents gamma data, and N represents the number of data bits of the gamma data.

[0116] At the moment when the working mode of the display panel 1 switches from the first working mode to the second working mode, the gamma data (gamma value) does not change, and the gamma value data in the first working mode is maintained. The first power supply voltage ELVDD provided by the power module 3 to the display panel 1 changes, and the display driving module 2 is connected to the first power supply voltage ELVDD in real time, and the change of the first power supply voltage ELVDD is calculated in real time. The minimum gamma voltage compensation value and the maximum gamma voltage compensation value are reasonably set according to the change of the first power supply voltage ELVDD, so that the minimum gamma voltage compensation value and the maximum gamma voltage compensation value satisfy the above relationship. The change of the first power supply voltage ELVDD is compensated by the minimum gamma voltage compensation value and the maximum gamma voltage compensation value. Ensure that at the moment when the display panel 1 switches the display mode, when the gamma value does not match the change of the first power supply voltage ELVDD, the display driving current I d The value remains unchanged, eliminating the mismatch between the gamma value and the change of the first power supply voltage ELVDD and the display driving current I d The problem of obvious brightness flickering of the display panel 1 at the moment of mode switching of the display panel 1 is effectively solved.

[0117] Optionally, based on the above embodiments, Figure 3 is a schematic structural diagram of another display device provided by an embodiment of the present invention, such as Figure 3 As shown, the display driver module 2 includes a first voltage acquisition unit 23, a first voltage conversion unit 21, and a first voltage compensation unit 22. The first voltage acquisition unit 23 is connected to the first power supply voltage ELVDD and is used to obtain the change in the first power supply voltage ELVDD. The first voltage conversion unit 21 is connected to the power supply module 3 and is also connected to the first voltage compensation unit 22. The first voltage conversion unit 21 is used to generate at least one of a first minimum gamma voltage, a second minimum gamma voltage, and a first maximum gamma voltage based on the second power supply voltage VCI. The first voltage compensation unit 22 is connected to the first voltage acquisition unit 23 and is used to generate a maximum gamma voltage compensation value ΔVGMP based on the change in the first power supply voltage ELVDD and / or the difference between the second minimum gamma voltage and the first minimum gamma voltage. The first voltage conversion unit 21 generates a second maximum gamma voltage based on at least one of the second power supply voltage VCI and the first maximum gamma voltage, as well as the maximum gamma voltage compensation value ΔVGMP.

[0118] Specifically, such as Figure 3 As shown, in order to eliminate the mismatch between the gamma value (which remains unchanged at this time) and the change of the first power supply voltage ELVDD when the display panel 1 switches the display mode, the display driving current I dIn view of the influence of the display driver module 2, the embodiment of the present invention establishes a linkage relationship between the first power supply voltage ELVDD and the maximum gamma voltage VGMP. The display driver module 2 may include a first voltage conversion unit 21, a first voltage compensation unit 22, and a first voltage acquisition unit 23. The first voltage acquisition unit 23 can access the first power supply voltage ELVDD in real time and calculate the change in the first power supply voltage ELVDD in real time. The first voltage conversion unit 21 may include a charge pump 211, a first low-voltage dropout linear regulator 212, a second low-voltage dropout linear regulator 213, a third low-voltage dropout linear regulator 214, and a DAC (digital-to-analog converter) 215. The charge pump 211 accesses the second power supply voltage VCI and performs a voltage step-up process, which is then stepped down by the first low-voltage dropout linear regulator 212 to generate the third power supply voltage AVDD. The third power supply voltage AVDD is converted into the maximum gamma voltage VGMP by the second low-voltage dropout linear regulator 213, and the third power supply voltage AVDD is converted into the minimum gamma voltage VGSP by the third low-voltage dropout linear regulator 214. The DAC (Digital-to-Analog Converter) 215 receives the gamma value data, the maximum gamma voltage VGMP, and the minimum gamma voltage VGSP, and generates the data voltage Vdata according to the gamma value data, the maximum gamma voltage VGMP, and the minimum gamma voltage VGSP to provide to the display panel 1 .

[0119] When the display panel 1 operates in the first operating mode, the first voltage conversion unit 21 generates a first minimum gamma voltage and a first maximum gamma voltage according to the second power supply voltage VCI, and generates a data voltage Vdata to the display panel 1 according to the first minimum gamma voltage, the first maximum gamma voltage and the gamma value corresponding to the first operating mode. At this time, the power supply module 3 also provides the first power supply voltage ELVDD corresponding to the first operating mode to the display panel 1, and the display panel 1 operates normally in the first operating mode.

[0120] When the operating mode of the display panel 1 switches from the first operating mode to the second operating mode, the first power supply voltage ELVDD provided to the display panel 1 by the power module 3 changes. The first voltage acquisition unit 23 accesses the first power supply voltage ELVDD in real time and calculates the change in the first power supply voltage ELVDD in real time. The first voltage compensation unit 22 obtains the difference between the first minimum gamma voltage corresponding to the first operating mode and the second minimum gamma voltage corresponding to the second operating mode. Based on the change in the first power supply voltage ELVDD and / or the difference between the first minimum gamma voltage and the second minimum gamma voltage, a maximum gamma voltage compensation value ΔVGMP is obtained. The maximum gamma voltage compensation value ΔVGMP is used to compensate for the change in the first power supply voltage ELVDD. The first voltage conversion unit 21 then integrates the maximum gamma voltage compensation value ΔVGMP with the first maximum gamma voltage corresponding to the first operating mode to calculate the second maximum gamma voltage corresponding to the second operating mode. Alternatively, the first voltage conversion unit 21 generates the second maximum gamma voltage based on the second power supply voltage VCI and the maximum gamma voltage compensation value ΔVGMP. Ensure that at the moment when the display panel 1 switches the display mode, when the gamma value does not match the change of the first power supply voltage ELVDD, the display driving current I d The value remains unchanged, eliminating the mismatch between the gamma value and the change of the first power supply voltage ELVDD and the display driving current I d The problem of obvious brightness flickering of the display panel 1 at the moment of mode switching is effectively solved.

[0121] Optionally, based on the above embodiments, Figure 4 is a structural diagram of another display device provided by an embodiment of the present invention, such as Figure 4 As shown, the display driver module 2 includes a second voltage acquisition unit 33, a second voltage conversion unit 31, and a second voltage compensation unit 32. The second voltage acquisition unit 33 is connected to the first power supply voltage ELVDD and is used to obtain the change in the first power supply voltage ELVDD. The second voltage conversion unit 31 is connected to the power supply module 3 and is also connected to the second voltage compensation unit 32. For example, the second voltage conversion unit 31 is used to generate at least one of a first maximum gamma voltage, a second maximum gamma voltage, and a first minimum gamma voltage based on the second power supply voltage VCI. The second voltage compensation unit 32 is connected to the second voltage acquisition unit 33 and is used to generate a minimum gamma voltage compensation value ΔVGSP based on the change in the first power supply voltage ELVDD and the difference between the second maximum gamma voltage and the first maximum gamma voltage. The second voltage conversion unit 31 generates a second minimum gamma voltage based on at least one of the second power supply voltage VCI and the first minimum gamma voltage, as well as the minimum gamma voltage compensation value ΔVGSP.

[0122] Specifically, such as Figure 4 As shown, in order to eliminate the mismatch between the gamma value (which remains unchanged at this time) and the change of the first power supply voltage ELVDD when the display panel 1 switches the display mode, the display driving current I d In view of the influence of the display driver module 2, the embodiment of the present invention establishes a linkage relationship between the first power supply voltage ELVDD and the minimum gamma voltage VGSP. The display driver module 2 may include a second voltage conversion unit 31, a second voltage compensation unit 32, and a second voltage acquisition unit 33. The second voltage acquisition unit 33 can access the first power supply voltage ELVDD in real time and calculate the change in the first power supply voltage ELVDD in real time. The second voltage conversion unit 31 may include a charge pump 211, a first low-voltage dropout linear regulator 212, a second low-voltage dropout linear regulator 213, a third low-voltage dropout linear regulator 214, and a DAC (digital-to-analog converter) 215. The charge pump 211 accesses the second power supply voltage VCI and performs a voltage step-up process, which is then stepped down by the first low-voltage dropout linear regulator 212 to generate the third power supply voltage AVDD. The third power supply voltage AVDD is converted into the maximum gamma voltage VGMP by the second low-voltage dropout linear regulator 213, and the third power supply voltage AVDD is converted into the minimum gamma voltage VGSP by the third low-voltage dropout linear regulator 214. The DAC (Digital-to-Analog Converter) 215 receives the gamma value data, the maximum gamma voltage VGMP, and the minimum gamma voltage VGSP, and generates the data voltage Vdata according to the gamma value data, the maximum gamma voltage VGMP, and the minimum gamma voltage VGSP to provide to the display panel 1 .

[0123] When the display panel 1 operates in the first operating mode, the second voltage conversion unit 31 generates a first minimum gamma voltage and a first maximum gamma voltage according to the second power supply voltage VCI, and generates a data voltage Vdata to the display panel 1 according to the first minimum gamma voltage, the first maximum gamma voltage and the gamma value corresponding to the first operating mode. At this time, the power supply module 3 also provides the first power supply voltage ELVDD corresponding to the first operating mode to the display panel 1, and the display panel 1 operates normally in the first operating mode.

[0124] At the moment the operating mode of the display panel 1 switches from the first operating mode to the second operating mode, the first power supply voltage ELVDD provided to the display panel 1 by the power module 3 changes. The second voltage acquisition unit 33 accesses the first power supply voltage ELVDD in real time and calculates the change in the first power supply voltage ELVDD in real time. The second voltage compensation unit 32 calculates the difference between the first maximum gamma voltage corresponding to the first operating mode and the second maximum gamma voltage corresponding to the second operating mode. Based on the change in the first power supply voltage ELVDD and the difference between the first maximum gamma voltage and the second maximum gamma voltage, a minimum gamma voltage compensation value ΔVGSP is calculated. The change in the first power supply voltage ELVDD is compensated for using the minimum gamma voltage compensation value ΔVGSP. The second voltage conversion unit 31 then integrates the minimum gamma voltage compensation value ΔVGSP with the first minimum gamma voltage corresponding to the first operating mode to calculate the second minimum gamma voltage corresponding to the second operating mode. Alternatively, the second voltage conversion unit generates the second minimum gamma voltage based on the second power supply voltage VCI and the minimum gamma voltage compensation value ΔVGSP. Ensure that at the moment when the display panel 1 switches the display mode, when the gamma value does not match the change of the first power supply voltage ELVDD, the display driving current I d The value remains unchanged, eliminating the mismatch between the gamma value and the change of the first power supply voltage ELVDD and the display driving current I d The problem of obvious brightness flickering of the display panel 1 at the moment of mode switching is effectively solved.

[0125] For example, the second voltage acquisition unit 33 and the first voltage acquisition unit 23 may be the same voltage acquisition unit, that is, the first voltage compensation unit 22 and the second voltage compensation unit 32 share the same voltage acquisition unit.

[0126] For example, the second voltage conversion unit 31 and the first voltage conversion unit 21 may be the same voltage conversion unit.

[0127] Optionally, based on the above embodiments, continue to refer to Figure 3 Generating a maximum gamma voltage compensation value △VGMP according to a difference between the second minimum gamma voltage and the first minimum gamma voltage and a change in the first power supply voltage ELVDD when switching from the first operating mode to the second operating mode includes:

[0128]

[0129] Wherein, ΔVGMP represents the maximum gamma voltage compensation value, ΔELVDD represents the variation of the first power supply voltage ELVDD, ΔVGSP0 represents the difference between the second minimum gamma voltage and the first minimum gamma voltage, data represents the gamma value, and N represents the number of data bits of the gamma value.

[0130] Specifically, it is assumed that the parameters corresponding to the first operating mode of the display panel 1 are: the first minimum gamma voltage VGSP1, the first maximum gamma voltage VGMP1, the first sub-power supply voltage ELVDD1 and the first gamma value data1; the parameters corresponding to the second operating mode of the display panel 1 are: the second minimum gamma voltage VGSP2, the second maximum gamma voltage VGMP2, the second sub-power supply voltage ELVDD2 and the second gamma value data2.

[0131] At the moment the display panel 1 switches from the first operating mode to the second operating mode, the first power supply voltage ELVDD provided to the display panel 1 by the power module 3 switches from the first sub-power supply voltage ELVDD1 to the second sub-power supply voltage ELVDD2. At this time, the gamma value does not match the switching of the first power supply voltage ELVDD. The first gamma value data1 does not switch to the second gamma value data2, but remains at the first gamma value data1. The gamma value in the first operating mode and the gamma value in the second operating mode are both represented by data, that is, data is data1.

[0132] The maximum gamma voltage compensation value ΔVGMP is the difference between the first maximum gamma voltage VGMP1 and the second maximum gamma voltage VGMP2. The second maximum gamma voltage VGMP2 is an unknown quantity. The second maximum gamma voltage VGMP2 is calculated by calculating the maximum gamma voltage compensation value ΔVGMP. The change in the first power supply voltage ΔELVDD is the difference between the first sub-power supply voltage ELVDD1 and the second sub-power supply voltage ELVDD2. The difference between the second minimum gamma voltage and the first minimum gamma voltage is ΔVGSP0, which is the difference between the first minimum gamma voltage VGSP1 and the second minimum gamma voltage VGSP2. In this case, the calculation of the maximum gamma voltage compensation value ΔVGMP compensates for the change in the first power supply voltage ELVDD. The first minimum gamma voltage VGSP1 corresponding to the first operating mode and the second minimum gamma voltage VGSP2 corresponding to the second operating mode can be parameters obtained by the display driver module 2 based on the second power supply voltage VCI, or they can be pre-set known parameters.

[0133] As can be seen from the above, the display driving current I of the display panel 1 in the first working mode is d1 The calculation formula is:

[0134]

[0135] As can be seen from the above, the display driving current I of the display panel 1 in the second working mode is d2 The calculation formula is:

[0136]

[0137] In order to eliminate the brightness flicker caused by the mismatch between the gamma value and the change of the first power supply voltage ELVDD at the moment of mode switching of the display panel 1, that is, to eliminate the display driving current I d The transformation, that is, let I d1 with I d2 equal:

[0138]

[0139] It can be seen that the first voltage compensation unit 22 can calculate the maximum gamma voltage compensation value △VGMP based on the change △ELVDD of the first power supply voltage ELVDD, the difference △VGSP0 between the second minimum gamma voltage VGSP2 and the first minimum gamma voltage VGSP1, and the gamma value data, and compensates the change of the first power supply voltage ELVDD with the maximum gamma voltage compensation value △VGMP. This ensures that when the display panel 1 switches the display mode, when the gamma value does not match the change of the first power supply voltage ELVDD, the display driving current I d The value remains unchanged.

[0140] Optionally, based on the above embodiments, continue to refer to Figure 4 Generating the minimum gamma voltage compensation value ΔVGSP according to the difference between the second maximum gamma voltage and the first maximum gamma voltage and the change in the first power supply voltage ELVDD when switching from the first operating mode to the second operating mode includes:

[0141]

[0142] Wherein, ΔVGSP represents the minimum gamma voltage compensation value, ΔVGMP0 represents the difference between the second maximum gamma voltage and the first maximum gamma voltage, ΔELVDD represents the change in the first power supply voltage ELVDD, data represents gamma data (gamma value), and N represents the number of bits of the gamma data (gamma value).

[0143] Specifically, it is assumed that the parameters corresponding to the first operating mode of the display panel 1 are: the first minimum gamma voltage VGSP1, the first maximum gamma voltage VGMP1, the first sub-power supply voltage ELVDD1 and the first gamma value data1; the parameters corresponding to the second operating mode of the display panel 1 are: the second minimum gamma voltage VGSP2, the second maximum gamma voltage VGMP2, the second sub-power supply voltage ELVDD2 and the second gamma value data2.

[0144] At the moment the display panel 1 switches from the first operating mode to the second operating mode, the first power supply voltage ELVDD provided to the display panel 1 by the power module 3 switches from the first sub-power supply voltage ELVDD1 to the second sub-power supply voltage ELVDD2. At this time, the gamma value does not match the switching of the first power supply voltage ELVDD. The first gamma value data1 does not switch to the second gamma value data2, but remains at the first gamma value data1. The gamma value in the first operating mode and the gamma value in the second operating mode are both represented by data, that is, data is data1.

[0145] The minimum gamma voltage compensation value ΔVGSP is the difference between the first minimum gamma voltage VGSP1 and the second minimum gamma voltage VGSP2. The second minimum gamma voltage VGSP2 is an unknown quantity and is calculated by calculating the minimum gamma voltage compensation value ΔVGSP. The change in the first power supply voltage ΔELVDD is the difference between the first sub-power supply voltage ELVDD1 and the second sub-power supply voltage ELVDD2. The difference between the second maximum gamma voltage and the first maximum gamma voltage is ΔVGMP0, which is the difference between the first maximum gamma voltage VGMP1 and the second maximum gamma voltage VGMP2. In this case, the calculation of the minimum gamma voltage compensation value ΔVGSP compensates for the change in the first power supply voltage ELVDD. The first maximum gamma voltage VGMP1 corresponding to the first operating mode and the second maximum gamma voltage VGMP2 corresponding to the second operating mode can be parameters obtained by the display driver module 2 based on the second power supply voltage VCI, or they can be pre-set known parameters.

[0146] In order to eliminate the brightness flicker caused by the mismatch between the gamma value and the change of the first power supply voltage ELVDD at the mode switching moment of the display panel 1, that is, to eliminate the display driving current I d The transformation, that is, let I d1 with I d2 equal:

[0147]

[0148] It can be seen that the first voltage compensation unit 22 can calculate the minimum gamma voltage compensation value △VGSP based on the change △ELVDD of the first power supply voltage ELVDD, the difference △VGMP0 between the second maximum gamma voltage VGMP2 and the first maximum gamma voltage VGMP1, and the gamma value data, and compensates the change of the first power supply voltage ELVDD with the minimum gamma voltage compensation value △VGSP. This ensures that when the display panel 1 switches the display mode, when the gamma value does not match the change of the first power supply voltage ELVDD, the display driving current I d The value remains unchanged.

[0149] The display driver module 2 provided by the above embodiment of the present invention can calculate the minimum gamma voltage compensation value △VGSP based on the change △ELVDD of the first power supply voltage ELVDD and the difference △VGMP0 between the first maximum gamma voltage VGMP1 and the second maximum gamma voltage VGMP2, or calculate the maximum gamma voltage compensation value △VGMP based on the change △ELVDD of the first power supply voltage ELVDD and the difference △VGSP0 between the first minimum gamma voltage VGSP1 and the second minimum gamma voltage VGSP2. This function is disabled during the gamma debugging process and can be enabled after the gamma debugging is completed.

[0150] Optionally, based on the above embodiments, continue to refer to Figure 1 and Figure 2 , the brightness level of the first operating mode is different from the brightness level of the second operating mode. Optionally, the brightness level of the first operating mode is lower than the brightness level of the second operating mode; or, the brightness level of the first operating mode is higher than the brightness level of the second operating mode. Optionally, when the first operating mode is switched to the second operating mode, the gamma data (gamma value) generated by the display driver module 2 remains unchanged.

[0151] Specifically, the first working mode may be a normal display mode, and the second working mode may be a highlight display mode. Alternatively, the first working mode may be a highlight display mode, and the second working mode may be a normal display mode.

[0152] In the first working mode of the display panel 1, the pixel circuit can provide the light emitting element D1 with the display driving current I required in the first working mode. d .

[0153] At the moment when the display panel 1 switches from the first working mode to the second working mode, the first power supply voltage ELVDD provided by the power supply module 3 changes. Since the gamma value generated by the display driving module 2 (which remains unchanged at this time) does not match the change of the first power supply voltage ELVDD, the change of the first power supply voltage ELVDD causes the display driving current I d The abnormal change causes the brightness of the display panel 1 to flicker at the moment of mode switching.

[0154] In the embodiment of the present invention, when the display panel 1 switches from the first operating mode to the second operating mode, the maximum gamma voltage compensation value and / or the minimum gamma voltage compensation value are calculated according to the change in the first power supply voltage ELVDD, thereby adjusting the maximum gamma voltage VGMP and / or the minimum gamma voltage VGSP generated by the display driver module 2, that is, adjusting the data voltage Vdata according to the change in the first power supply voltage ELVDD, so that the change in the data voltage Vdata can compensate for the change in the first power supply voltage ELVDD. This ensures that the display panel 1 displays the driving current I d The value of the first power supply voltage ELVDD remains unchanged, eliminating the effect of the change of the first power supply voltage ELVDD on the display driving current I d impact.

[0155] After the display panel 1 switches to the second operating mode, the gamma value generated by the display driving module 2 will become the gamma value required by the second operating mode. At this time, the change in the first power supply voltage ELVDD matches the change in the gamma value, and the pixel circuit can provide the light-emitting element D1 with the display driving current I required in the second operating mode. d .

[0156] Based on the same inventive concept, Figure 5 is a structural diagram of another display device provided by an embodiment of the present invention, Figure 6 FIG. 1 is a structural diagram of another display device provided by an embodiment of the present invention. The display device includes: a display panel 1 and a display driving module 2 .

[0157] The display driver module 2 is connected to the display panel 1. The display driver module 2 is used to adjust the minimum gamma voltage VGSP according to the variation of the maximum gamma voltage VGMP, or to adjust the maximum gamma voltage VGMP according to the variation of the minimum gamma voltage VGSP.

[0158] Specifically, such as Figure 6As shown, for example, when switching from the first operating mode to the second operating mode, the change in the first power supply voltage ELVDD is zero or small, for example, smaller than or much smaller than the change in the maximum gamma voltage VGMP, and / or the absolute value of the change in the first power supply voltage ELVDD is smaller than or much smaller than the absolute value of the change in the maximum gamma voltage VGMP. The fourth voltage compensation unit 52 calculates the change in the maximum gamma voltage VGMP in real time and calculates the minimum gamma voltage compensation value ΔVGSP based on the change in the maximum gamma voltage VGMP. The change in the maximum gamma voltage VGMP is compensated for by the minimum gamma voltage compensation value ΔVGSP. The fourth voltage conversion unit 51 integrates the minimum gamma voltage compensation value ΔVGSP with the first minimum gamma voltage corresponding to the first operating mode to calculate the second minimum gamma voltage corresponding to the second operating mode. Alternatively, the fourth voltage conversion unit 51 generates the second minimum gamma voltage corresponding to the second operating mode based on the second power supply voltage VCI and the minimum gamma voltage compensation value ΔVGSP. This ensures that when the display panel 1 switches the display mode, the display driving current I d The value remains unchanged, eliminating the effect of the change of the maximum gamma voltage VGMP on the display drive current I d The problem of obvious brightness flickering of the display panel 1 at the moment of mode switching of the display panel 1 is effectively solved.

[0159] Or, as Figure 5 As shown, for example, when switching from the first operating mode to the second operating mode, the change in the first power supply voltage ELVDD is zero or small, for example, smaller than or much smaller than the change in the minimum gamma voltage VGSP during the mode switching, and / or the absolute value of the change in the first power supply voltage ELVDD is smaller than or much smaller than the absolute value of the change in the minimum gamma voltage VGSP. The third voltage compensation unit 42 calculates the change in the minimum gamma voltage VGSP in real time and calculates the maximum gamma voltage compensation value ΔVGMP based on the change in the minimum gamma voltage VGSP. The third voltage conversion unit 41 compensates for the change in the minimum gamma voltage VGSP using the maximum gamma voltage compensation value ΔVGMP, and then integrates the maximum gamma voltage compensation value ΔVGMP with the first maximum gamma voltage corresponding to the first operating mode to calculate the second maximum gamma voltage corresponding to the second operating mode. Alternatively, the third voltage conversion unit 41 generates the second maximum gamma voltage corresponding to the second operating mode based on the second power supply voltage VCI and the maximum gamma voltage compensation value ΔVGMP. Ensure that at the moment when the display panel 1 switches the display mode, when the minimum gamma voltage VGSP changes abnormally, the display driving current I d The value remains unchanged, eliminating the effect of the change of the minimum gamma voltage VGSP on the display drive current I dThe problem of obvious brightness flickering of the display panel 1 at the moment of mode switching of the display panel 1 is effectively solved.

[0160] Optional, such as Figure 5 As shown, for example, when switching from the first operating mode to the second operating mode, the change in the first power supply voltage ELVDD is zero or small, for example, less than or much less than the change in the minimum gamma voltage when the mode is switched, the operating mode of the display panel 1 includes the first operating mode and the second operating mode; the power supply module 3 is used to provide the second power supply voltage VCI to the display driving module 2.

[0161] The display driving module 2 is configured to generate at least one of a first minimum gamma voltage and a first maximum gamma voltage according to the second power supply voltage VCI in a first operation mode.

[0162] And / or, the display driving module 2 is used to generate a maximum gamma voltage compensation value ΔVGMP based on the difference between the second minimum gamma voltage and the first minimum gamma voltage, and generate a second maximum gamma voltage based on at least one of the second power supply voltage VCI and the first maximum gamma voltage, and the maximum gamma voltage compensation value ΔVGMP.

[0163] And / or, the display driving module 2 is configured to generate a second minimum gamma voltage according to the second power supply voltage VCI in the second operating mode.

[0164] The first minimum gamma voltage is the minimum gamma voltage VGSP generated by the display driver module 2 in the first operating mode, and the first maximum gamma voltage is the maximum gamma voltage VGMP generated by the display driver module 2 in the first operating mode; the second minimum gamma voltage is the minimum gamma voltage VGSP generated by the display driver module 2 in the second operating mode, and the second maximum gamma voltage is the maximum gamma voltage VGMP generated by the display driver module 2 in the second operating mode.

[0165] Optional, such as Figure 5 and Figure 6 As shown, for example, when switching from the first operation mode to the second operation mode, the change in the first power supply voltage ELVDD is zero or small. The operation modes of the display panel 1 include the first operation mode and the second operation mode.

[0166] The second maximum gamma voltage generated by the display driving module 2 in the second working mode is greater than the first maximum gamma voltage generated by the display driving module 2 in the first working mode; the second minimum gamma voltage generated by the display driving module 2 in the second working mode is less than the first minimum gamma voltage generated by the display driving module 2 in the first working mode.

[0167] And / or, the second maximum gamma voltage generated by the display driving module 2 in the second operating mode is less than the first maximum gamma voltage generated by the display driving module 2 in the first operating mode; the second minimum gamma voltage generated by the display driving module 2 in the second operating mode is greater than the first minimum gamma voltage generated by the display driving module 2 in the first operating mode.

[0168] And / or, the minimum gamma voltage VGSP is adjusted according to the variation of the maximum gamma voltage VGMP, or the maximum gamma voltage VGMP is adjusted according to the variation of the minimum gamma voltage VGSP, satisfying the following relationship:

[0169]

[0170] Wherein, △VGMP represents the maximum gamma voltage compensation value, △VGSP represents the minimum gamma voltage compensation value, data represents gamma data, and N represents the number of data bits of the gamma data.

[0171] And / or, the brightness level of the first operating mode is different from the brightness level of the second operating mode.

[0172] And / or, the refresh frequency of the first operating mode is different from the refresh frequency of the second operating mode.

[0173] Optionally, the brightness level of the first operating mode is lower than the brightness level of the second operating mode; or, the brightness level of the first operating mode is higher than the brightness level of the second operating mode.

[0174] Optionally, when the first operating mode is switched to the second operating mode, the gamma data generated by the display driving module 2 remains unchanged.

[0175] Optional, such as Figure 6 As shown, the operating modes of the display panel 1 include a first operating mode and a second operating mode; the power supply module 3 is used to provide a second power supply voltage VCI to the display driving module 2 .

[0176] The display driving module 2 is configured to generate at least one of a first minimum gamma voltage and a first maximum gamma voltage according to the second power supply voltage VCI in a first operation mode.

[0177] And / or, the display driving module 2 is used to generate a minimum gamma voltage compensation value ΔVGSP according to the difference between the second maximum gamma voltage and the first maximum gamma voltage, and generate a second minimum gamma voltage according to at least one of the second power supply voltage VCI and the first minimum gamma voltage, and the minimum gamma voltage compensation value ΔVGSP.

[0178] And / or, the display driving module 2 is configured to generate a second maximum gamma voltage according to the second power supply voltage VCI in the second operating mode.

[0179] Optional, such as Figure 5 As shown, the display driving module 2 includes: a third voltage conversion unit 41 and a third voltage compensation unit 42 .

[0180] The third voltage compensation unit 42 is connected to the minimum gamma voltage VGSP to obtain a variation of the minimum gamma voltage VGSP.

[0181] The third voltage conversion unit 41 is connected to the power module 3, and the third voltage conversion unit 41 is connected to the third voltage compensation unit 42. The third voltage conversion unit 41 is used to generate at least one of the first minimum gamma voltage, the second minimum gamma voltage and the first maximum gamma voltage according to the second power supply voltage VCI.

[0182] The third voltage compensation unit 42 is configured to generate a maximum gamma voltage compensation value ΔVGMP according to a difference between the second minimum gamma voltage and the first minimum gamma voltage.

[0183] The third voltage conversion unit 41 is configured to generate a second maximum gamma voltage according to at least one of the second power voltage VCI and the first maximum gamma voltage, and a maximum gamma voltage compensation value ΔVGMP.

[0184] Optional, such as Figure 6 As shown, the display driving module 2 includes: a fourth voltage conversion unit 51 and a fourth voltage compensation unit 52 .

[0185] The fourth voltage compensation unit 52 is connected to the maximum gamma voltage VGMP to obtain a variation of the maximum gamma voltage VGMP.

[0186] The fourth voltage conversion unit 51 is connected to the power module 3, and the fourth voltage conversion unit 51 is connected to the fourth voltage compensation unit 52. The fourth voltage conversion unit 51 is used to generate at least one of the first maximum gamma voltage, the second maximum gamma voltage and the first minimum gamma voltage according to the second power supply voltage VCI.

[0187] The second four-voltage compensation unit 52 is configured to generate a minimum gamma voltage compensation value ΔVGSP according to a difference between the second maximum gamma voltage and the first maximum gamma voltage.

[0188] The second voltage conversion unit 51 is configured to generate a second minimum gamma voltage according to at least one of the second power voltage VCI and the first minimum gamma voltage, and a minimum gamma voltage compensation value ΔVGSP.

[0189] Optional, such as Figure 5 As shown, generating the maximum gamma voltage compensation value ΔVGMP according to the difference between the second minimum gamma voltage and the first minimum gamma voltage includes:

[0190]

[0191] Wherein, ΔVGMP represents the maximum gamma voltage compensation value, ΔVGSP1 represents the difference between the second minimum gamma voltage and the first minimum gamma voltage, data represents gamma data, and N represents the number of data bits of the gamma data.

[0192] Optional, such as Figure 6 As shown, generating the minimum gamma voltage compensation value ΔVGSP according to the difference between the second maximum gamma voltage and the first maximum gamma voltage includes:

[0193]

[0194] Wherein, ΔVGSP represents the minimum gamma voltage compensation value, ΔVGMP1 represents the difference between the second maximum gamma voltage and the first maximum gamma voltage, data represents gamma data, and N represents the number of data bits of the gamma data.

[0195] For example, the third voltage conversion unit 41 and the fourth voltage conversion unit 51 may be the same voltage conversion unit.

[0196] This embodiment can be combined with some or all of the features of the above embodiments, which will not be described in detail here.

[0197] Figure 7 FIG. 1 is a flow chart of a method for driving a display device provided by an embodiment of the present invention. The method for driving a display device can be applied to the display device in the above embodiment. Figure 1 As shown, the display device includes a display panel 1, a display driver module 2 and a power module 3. The power module 3 is connected to the display panel 1, the power module 3 is connected to the display driver module 2, and the display driver module 2 is connected to the display panel 1. Figure 7 As shown, the driving method of the display device provided by the embodiment of the present invention includes:

[0198] S100: The power module provides a first power voltage to the display panel.

[0199] S110: The display driving module is connected to a first power supply voltage, and determines a variation of the first power supply voltage, and adjusts a maximum gamma voltage and / or a minimum gamma voltage according to the variation of the first power supply voltage.

[0200] This embodiment can be combined with some or all of the features of the above embodiments, which will not be described in detail here.

[0201] Optionally, based on the above embodiments, Figure 8 is a flow chart of another method for driving a display device provided by an embodiment of the present invention. Figure 1As shown, the working modes of the display panel 1 include a first working mode and a second working mode. The power supply module 3 is used to provide the second power supply voltage VCI to the display driving module 2. Figure 8 As shown, the driving method includes:

[0202] S200: The power module provides a first power voltage to the display panel.

[0203] S210 : The display driving module generates a first minimum gamma voltage and a first maximum gamma voltage according to a second power supply voltage in a first operation mode.

[0204] S220: The display driving module generates a maximum gamma voltage compensation value based on a difference between the second minimum gamma voltage and the first minimum gamma voltage, and a change in the first power supply voltage when switching from the first operating mode to the second operating mode, and generates a second maximum gamma voltage based on at least one of the second power supply voltage and the first maximum gamma voltage, and the maximum gamma voltage compensation value.

[0205] Optionally, based on the above embodiments, Figure 9 is a flow chart of another method for driving a display device provided by an embodiment of the present invention. Figure 1 As shown, the working modes of the display panel 1 include a first working mode and a second working mode. The power supply module 3 is used to provide the second power supply voltage VCI to the display driving module 2. Figure 9 As shown, the driving method includes:

[0206] S300: The power module provides a first power voltage to the display panel.

[0207] S310 : The display driving module generates a first minimum gamma voltage and a first maximum gamma voltage according to a second power supply voltage in a first operation mode.

[0208] S320: The display driver module generates a minimum gamma voltage compensation value based on a difference between the second maximum gamma voltage and the first maximum gamma voltage, and a change in the first power supply voltage when switching from the first operating mode to the second operating mode, and generates a second minimum gamma voltage based on at least one of the second power supply voltage and the first minimum gamma voltage, and the minimum gamma voltage compensation value.

[0209] This embodiment can be combined with some or all of the features of the above embodiments, which will not be described in detail here.

[0210] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0211] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

[0212] All or part of the steps of the methods disclosed above, and the functional modules / units in the systems and devices, may be implemented using software, firmware, hardware, or any combination thereof. In hardware implementations, the division of functional modules / units described above may not correspond to the division of physical components. For example, a physical component may have multiple functions, or a function or step may be performed jointly by multiple physical components. Some or all components may be implemented as software executed by a processor such as a digital signal processor or microcontroller, hardware, or an integrated circuit such as an application-specific integrated circuit. Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transient media). As known to those skilled in the art, the term "computer storage media" includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital video disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium for storing the desired information and accessing it by a computer. Additionally, as known to those skilled in the art, communication media typically includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and can include any information delivery media.

Claims

1. A display device, characterized in that: include: Display panel, display driver module and power module; The power supply module is connected to the display panel, the power supply module is connected to the display driving module, and the display driving module is connected to the display panel; The power supply module is used to provide a first power supply voltage and a second power supply voltage to the display panel, and the display driving module is used to adjust the maximum gamma voltage and / or the minimum gamma voltage according to the change of the first power supply voltage; The display driving module includes: a first voltage acquisition unit, a first voltage conversion unit and a first voltage compensation unit; The first voltage acquisition unit is connected to the first power supply voltage and is used to obtain a change in the first power supply voltage; The first voltage conversion unit is connected to the power module, the first voltage conversion unit is connected to the first voltage compensation unit, and the first voltage conversion unit is used to generate a first minimum gamma voltage, a second minimum gamma voltage and a first maximum gamma voltage according to the second power voltage; The first voltage compensation unit is connected to the first voltage acquisition unit, and is configured to generate the maximum gamma voltage compensation value according to a change in the first power supply voltage and a difference between the second minimum gamma voltage and the first minimum gamma voltage; The first voltage conversion unit is configured to generate a second maximum gamma voltage according to at least one of the second power voltage and the first maximum gamma voltage, and the maximum gamma voltage compensation value; The display driving module includes: a second voltage acquisition unit, a second voltage conversion unit and a second voltage compensation unit; The second voltage acquisition unit is connected to the first power supply voltage and is used to obtain a change in the first power supply voltage; The second voltage conversion unit is connected to the power module, the second voltage conversion unit is connected to the second voltage compensation unit, and the second voltage conversion unit is used to generate a first maximum gamma voltage, a second maximum gamma voltage and a first minimum gamma voltage according to the second power supply voltage; The second voltage compensation unit is connected to the second voltage acquisition unit, and is configured to generate the minimum gamma voltage compensation value according to a change in the first power supply voltage and a difference between the second maximum gamma voltage and the first maximum gamma voltage; The second voltage conversion unit is configured to generate the second minimum gamma voltage according to at least one of the second power voltage and the first minimum gamma voltage, and the minimum gamma voltage compensation value.

2. The display device according to claim 1, wherein The operating mode of the display panel includes a first operating mode and a second operating mode; The power supply module is used to provide a second power supply voltage to the display driving module; the display driving module is used to generate a first minimum gamma voltage and a first maximum gamma voltage according to the second power supply voltage in the first working mode; and / or the display driver module is configured to generate a maximum gamma voltage compensation value based on a difference between a second minimum gamma voltage and the first minimum gamma voltage and a change in the first power supply voltage when switching from the first operating mode to the second operating mode, and generate a second maximum gamma voltage based on at least one of the second power supply voltage and the first maximum gamma voltage and the maximum gamma voltage compensation value; and / or, the display driving module is configured to generate a second minimum gamma voltage according to the second power supply voltage in the second operating mode; The first minimum gamma voltage is the minimum gamma voltage generated by the display driver module in the first operating mode, and the first maximum gamma voltage is the maximum gamma voltage generated by the display driver module in the first operating mode; the second minimum gamma voltage is the minimum gamma voltage generated by the display driver module in the second operating mode, and the second maximum gamma voltage is the maximum gamma voltage generated by the display driver module in the second operating mode.

3. The display device according to claim 1, wherein The operating mode of the display panel includes a first operating mode and a second operating mode; The first power supply voltage output by the power supply module in the second working mode is greater than the first power supply voltage output by the power supply module in the first working mode, and the second maximum gamma voltage generated by the display driving module in the second working mode is greater than the first maximum gamma voltage generated by the display driving module in the first working mode; or, a first power supply voltage output by the power supply module in the second operating mode is lower than the first power supply voltage output by the power supply module in the first operating mode, and a second maximum gamma voltage generated by the display driving module in the second operating mode is lower than the first maximum gamma voltage generated by the display driving module in the first operating mode; or, the first power supply voltage output by the power supply module in the second operating mode is greater than the first power supply voltage output by the power supply module in the first operating mode, and the second minimum gamma voltage generated by the display driving module in the second operating mode is greater than the first minimum gamma voltage generated by the display driving module in the first operating mode; Or, the first power supply voltage output by the power supply module in the second working mode is lower than the first power supply voltage output by the power supply module in the first working mode, and the second minimum gamma voltage generated by the display driver module in the second working mode is lower than the first minimum gamma voltage generated by the display driver module in the first working mode.

4. The display device according to claim 3, wherein: The maximum gamma voltage and the minimum gamma voltage are adjusted according to the variation of the first power supply voltage to satisfy the following relationship: Wherein, ΔVGMP represents the maximum gamma voltage compensation value, ΔELVDD represents the variation of the first power supply voltage, ΔVGSP represents the minimum gamma voltage compensation value, data represents gamma data, and N represents the number of data bits of the gamma data.

5. The display device according to claim 3, wherein The brightness level of the first operating mode is different from the brightness level of the second operating mode.

6. The display device according to claim 3, wherein: The refresh frequency of the first operating mode is different from the refresh frequency of the second operating mode.

7. The display device according to claim 5, wherein: The brightness level of the first working mode is lower than the brightness level of the second working mode; or, the brightness level of the first working mode is higher than the brightness level of the second working mode.

8. The display device according to claim 3, wherein When the first operating mode is switched to the second operating mode, the gamma data generated by the display driving module remains unchanged.

9. The display device according to claim 1, wherein The operating mode of the display panel includes a first operating mode and a second operating mode; The power supply module is used to provide a second power supply voltage to the display driving module; the display driving module is used to generate a first minimum gamma voltage and a first maximum gamma voltage according to the second power supply voltage in the first working mode; and / or the display driver module is configured to generate a minimum gamma voltage compensation value based on a difference between a second maximum gamma voltage and the first maximum gamma voltage and a change in the first power supply voltage when switching from the first operating mode to the second operating mode, and generate a second minimum gamma voltage based on at least one of the second power supply voltage and the first minimum gamma voltage and the minimum gamma voltage compensation value; and / or, the display driving module is configured to generate a second maximum gamma voltage according to the second power supply voltage in the second operating mode; The first minimum gamma voltage is the minimum gamma voltage generated by the display driver module in the first operating mode, and the first maximum gamma voltage is the maximum gamma voltage generated by the display driver module in the first operating mode; the second maximum gamma voltage is the maximum gamma voltage generated by the display driver module in the second operating mode, and the second minimum gamma voltage is the minimum gamma voltage generated by the display driver module in the second operating mode.

10. The display device according to claim 2, wherein Generating a maximum gamma voltage compensation value according to a difference between the second minimum gamma voltage and the first minimum gamma voltage and a change in the first power supply voltage when switching from the first operating mode to the second operating mode includes: Wherein, ΔVGMP represents the maximum gamma voltage compensation value, ΔELVDD represents the variation of the first power supply voltage, ΔVGSP0 represents the difference between the second minimum gamma voltage and the first minimum gamma voltage, data represents gamma data, and N represents the number of data bits of the gamma data.

11. The display device according to claim 9, wherein Generating a minimum gamma voltage compensation value according to a difference between the second maximum gamma voltage and the first maximum gamma voltage and a change in the first power supply voltage when switching from the first operating mode to the second operating mode includes: Wherein, ΔVGSP represents the minimum gamma voltage compensation value, ΔVGMP0 represents the difference between the second maximum gamma voltage and the first maximum gamma voltage, ΔELVDD represents the change in the first power supply voltage, data represents gamma data, and N represents the number of data bits of the gamma data.

12. A display device, characterized in that: include: Display panel, display driver module and power module; The power supply module is connected to the display panel, the power supply module is connected to the display driving module, and the display driving module is connected to the display panel; The display driving module is used to adjust the minimum gamma voltage according to the change of the maximum gamma voltage, or to adjust the maximum gamma voltage according to the change of the minimum gamma voltage; The power supply module provides a first power supply voltage and a second power supply voltage to the display panel, and the display driving module includes: a first voltage acquisition unit, a first voltage conversion unit and a first voltage compensation unit; The first voltage acquisition unit is connected to the first power supply voltage and is used to obtain a change in the first power supply voltage; The first voltage conversion unit is connected to the power module, the first voltage conversion unit is connected to the first voltage compensation unit, and the first voltage conversion unit is used to generate a first minimum gamma voltage, a second minimum gamma voltage and a first maximum gamma voltage according to the second power voltage; The first voltage compensation unit is connected to the first voltage acquisition unit, and is configured to generate the maximum gamma voltage compensation value according to a change in the first power supply voltage and a difference between the second minimum gamma voltage and the first minimum gamma voltage; The first voltage conversion unit is configured to generate a second maximum gamma voltage according to at least one of the second power voltage and the first maximum gamma voltage, and the maximum gamma voltage compensation value; The display driving module includes: a second voltage acquisition unit, a second voltage conversion unit and a second voltage compensation unit; The second voltage acquisition unit is connected to the first power supply voltage and is used to obtain a change in the first power supply voltage; The second voltage conversion unit is connected to the power module, the second voltage conversion unit is connected to the second voltage compensation unit, and the second voltage conversion unit is used to generate a first maximum gamma voltage, a second maximum gamma voltage and a first minimum gamma voltage according to the second power supply voltage; The second voltage compensation unit is connected to the second voltage acquisition unit, and is configured to generate the minimum gamma voltage compensation value according to a change in the first power supply voltage and a difference between the second maximum gamma voltage and the first maximum gamma voltage; The second voltage conversion unit is configured to generate the second minimum gamma voltage according to at least one of the second power voltage and the first minimum gamma voltage, and the minimum gamma voltage compensation value.

13. A method for driving a display device, characterized in that: The display device includes a display panel, a display driving module and a power module; the power module is connected to the display panel, the power module is connected to the display driving module, and the display driving module is connected to the display panel; The driving method includes: The power supply module provides a first power supply voltage and a second power supply voltage to the display panel; The display driving module adjusts the maximum gamma voltage and / or the minimum gamma voltage according to the variation of the first power supply voltage; The display driving module includes: a first voltage acquisition unit, a first voltage conversion unit and a first voltage compensation unit; The first voltage acquisition unit is connected to the first power supply voltage and is used to obtain a change in the first power supply voltage; The first voltage conversion unit is connected to the power module, the first voltage conversion unit is connected to the first voltage compensation unit, and the first voltage conversion unit is used to generate a first minimum gamma voltage, a second minimum gamma voltage and a first maximum gamma voltage according to the second power voltage; The first voltage compensation unit is connected to the first voltage acquisition unit, and is configured to generate the maximum gamma voltage compensation value according to a change in the first power supply voltage and a difference between the second minimum gamma voltage and the first minimum gamma voltage; The first voltage conversion unit is configured to generate a second maximum gamma voltage according to at least one of the second power voltage and the first maximum gamma voltage, and the maximum gamma voltage compensation value; The display driving module includes: a second voltage acquisition unit, a second voltage conversion unit and a second voltage compensation unit; The second voltage acquisition unit is connected to the first power supply voltage and is used to obtain a change in the first power supply voltage; The second voltage conversion unit is connected to the power module, the second voltage conversion unit is connected to the second voltage compensation unit, and the second voltage conversion unit is used to generate a first maximum gamma voltage, a second maximum gamma voltage and a first minimum gamma voltage according to the second power supply voltage; The second voltage compensation unit is connected to the second voltage acquisition unit, and is configured to generate the minimum gamma voltage compensation value according to a change in the first power supply voltage and a difference between the second maximum gamma voltage and the first maximum gamma voltage; The second voltage conversion unit is configured to generate the second minimum gamma voltage according to at least one of the second power voltage and the first minimum gamma voltage, and the minimum gamma voltage compensation value.

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