Display module, driving method thereof and display device

Abstract

The invention provides a display module, a driving method thereof and a display device. The display module comprises a display panel, a controller and a memory, the display panel comprises a plurality of sub-pixels, a plurality of pixel circuits and a gate drive circuit, wherein the sub-pixels are connected with the corresponding pixel circuits; the gate driving circuit comprises a driving voltage signal input end and a driving voltage signal output end; each pixel circuit is connected with the output end; a first mapping relation between the target brightness of the display panel and a driving voltage signal of the gate driving circuit and a second mapping relation between the target brightness of the display panel and a gamma curve are stored in the memory, and when the first target brightness of the display panel is smaller than the second target brightness of the display panel, the driving voltage signal of the gate driving circuit is generated. The absolute value of the driving voltage signal corresponding to the first target brightness determined according to the first mapping relation is smaller than the absolute value of the driving voltage signal corresponding to the second target brightness; the power consumption of the display module can be reduced.

Description

Technical Field

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

[0002] The gate drive circuit of the display panel includes a drive voltage signal input terminal. The drive voltage signal includes a high-level voltage signal (VGH) and a low-level voltage signal (VGL). In the traditional VGH / VGL voltage design scheme, the display panel uses the same VGH / VGL at all brightness levels. To ensure that all brightness levels are displayed normally, VGH / VGL is set to the maximum voltage required under all brightness scenes. Under this voltage design scheme, a higher voltage scheme is also used in low-brightness scenes, resulting in power consumption loss. Summary of the invention

[0003] In view of the shortcomings of the related art, the present application proposes a display module and a driving method thereof and a display device to solve the problem of high power consumption of the display module in the related art.

[0004] An embodiment of the present application provides a display module, which includes a display panel, a controller, and a memory; the display panel includes a plurality of sub-pixels, a plurality of pixel circuits, and a gate driving circuit, and the sub-pixels are connected to the corresponding pixel circuits; the gate driving circuit includes a driving voltage signal input terminal and an output terminal; the gate of the switching transistor of each pixel circuit is connected to the output terminal; the memory stores a first mapping relationship between the target brightness of the display panel and the driving voltage signal of the gate driving circuit and a second mapping relationship between the target brightness of the display panel and a gamma curve, and when the first target brightness of the display panel is less than the second target brightness of the display panel, the absolute value of the driving voltage signal corresponding to the first target brightness determined according to the first mapping relationship is less than the absolute value of the driving voltage signal corresponding to the second target brightness;

[0005] The controller is configured to: determine a target driving voltage signal of a gate driving circuit corresponding to the target brightness according to the target brightness of the display panel and the first mapping relationship, determine a target gamma curve corresponding to the target brightness according to the target brightness of the display panel and the second mapping relationship, and determine a target data voltage of a pixel circuit corresponding to each sub-pixel according to the acquired image data and the target gamma curve; control the driving voltage signal received by the gate driving circuit to be a target driving voltage signal, and control the data voltage received by a switching transistor of the pixel circuit corresponding to each sub-pixel to be a target data voltage.

[0006] In some embodiments, the pixel circuit includes a target transistor, a gate of the target transistor is connected to the output terminal, wherein:

[0007] The absolute value of the driving voltage signal of the gate driving circuit is: when the brightness of the display panel is the target brightness, the minimum value of the absolute value of the gate driving voltage signal required for the gate of the target transistor of the pixel circuit connected to the gate driving circuit to be normally turned on;

[0008] In some embodiments, the absolute value of the driving voltage signal of the gate driving circuit is: when the brightness of the display panel is the target brightness, the sum of the minimum absolute value of the gate driving voltage signal required for the gate of the target transistor of the pixel circuit connected to the gate driving circuit to be normally turned on and the compensation voltage, and the compensation voltage ranges from 0.1 to 0.2V.

[0009] In some embodiments, the driving voltage signal input terminal includes a high level voltage input terminal and a low level voltage input terminal, and the driving voltage signal includes a high level voltage signal and a low level voltage signal, wherein:

[0010] The negative value of the low-level voltage signal corresponding to the first target brightness is smaller than the negative value of the low-level voltage signal corresponding to the second target brightness;

[0011] And / or, the high-level voltage signal corresponding to the first target brightness is smaller than the high-level voltage signal corresponding to the second target brightness.

[0012] In some embodiments, in the first mapping relationship, the first target brightness is a first target brightness range, the second target brightness is a second target brightness range, and the maximum value of the first target brightness range is less than the minimum value of the second target brightness range of the display panel.

[0013] In some embodiments, the controller is further configured to determine target brightness based on the acquired image data.

[0014] The present application also provides a display device, comprising the aforementioned display module.

[0015] The present application also provides a method for driving a display module, which is applied to a controller of the display module as described above, and the method comprises:

[0016] determining a target brightness of the display panel;

[0017] Determining a target driving voltage signal of a gate driving circuit corresponding to the target brightness according to the target brightness of the display panel and the first mapping relationship, determining a target gamma curve corresponding to the target brightness according to the target brightness of the display panel and the second mapping relationship, and determining a target data voltage of a pixel circuit corresponding to each sub-pixel according to the acquired image data and the target gamma curve;

[0018] The driving voltage received by the gate driving circuit is controlled to be a target driving voltage signal, and the data voltage received by the switch transistor of the pixel circuit corresponding to each sub-pixel is controlled to be a target data voltage.

[0019] In some embodiments, the pixel circuit includes a target transistor, the gate of which is connected to the output end, wherein the absolute value of the driving voltage signal of the gate driving circuit is: when the brightness of the display panel is the target brightness, the gate of the target transistor of the pixel circuit connected to the gate driving circuit is the minimum absolute value of the gate driving voltage signal required for normal conduction of the gate; or, the absolute value of the driving voltage signal of the gate driving circuit is: when the brightness of the display panel is the target brightness, the gate of the target transistor of the pixel circuit connected to the gate driving circuit is the sum of the minimum absolute value of the gate driving voltage signal required for normal conduction of the gate and the compensation voltage, and the compensation voltage ranges from 0.1 to 0.2V.

[0020] In some embodiments, the driving voltage signal input terminal includes a high level voltage input terminal and a low level voltage input terminal, and the driving voltage signal includes a high level voltage signal and a low level voltage signal, wherein:

[0021] The negative value of the low-level voltage signal corresponding to the first target brightness is smaller than the negative value of the low-level voltage signal corresponding to the second target brightness;

[0022] And / or, the high-level voltage signal corresponding to the first target brightness is smaller than the high-level voltage signal corresponding to the second target brightness.

[0023] In some embodiments, determining the target brightness of the display panel includes:

[0024] The target brightness of the display panel is determined according to the acquired image data.

[0025] The beneficial effects of this application include:

[0026] The display module in this embodiment can be implemented that, in different target brightness scenarios of the display panel, the controller can determine the gate driving voltage at the corresponding target brightness according to the first mapping relationship stored in the memory, and when the first target brightness of the display panel is less than the second target brightness of the display panel, the absolute value of the driving voltage signal corresponding to the first target brightness determined in the first mapping relationship is less than the absolute value of the driving voltage signal corresponding to the second target brightness. Compared with the use of the same fixed gate driving voltage in different brightness scenarios in the related art, the power consumption of the gate driving voltage in low-brightness display scenarios can be reduced; the controller can obtain the corresponding target gamma curve according to the second mapping relationship stored in the memory, and determine the target data voltage of the pixel circuit corresponding to each sub-pixel according to the acquired image data and the target gamma curve, so that the gate driving circuit can use different driving voltage signals at different target brightnesses while ensuring that the display panel can reach the corresponding target brightness.

[0027] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0029] Figure 1 Shown is a schematic structural diagram of a display module provided by an exemplary embodiment of the present application;

[0030] Figure 2 FIG. 1 is a circuit topology diagram of a pixel circuit provided by an exemplary embodiment of the present application;

[0031] Figure 3 The following is an exemplary embodiment of the present application. Figure 2 A schematic diagram of the structure of a gate driving circuit connected to the gate of the T2 transistor in the pixel circuit shown;

[0032] Figure 4 Another exemplary embodiment of the present application is shown. Figure 2 A schematic diagram of the structure of a gate driving circuit connected to the gate of the T4 transistor in the pixel circuit shown;

[0033] Figure 5 Shown Figure 3 A timing diagram of a low level signal input to the gate of each transistor of the pixel circuit shown;

[0034] Figure 6FIG. 1 is a diagram showing a simulation result of a Vgs voltage of a T2 transistor corresponding to different VGLs of a display panel provided by an exemplary embodiment of the present application in a 1200 nit (nit) scene;

[0035] Figure 7 Shown is a power consumption data diagram of a display module in related art under different brightness scenarios;

[0036] Figure 8 Shown is a power consumption data diagram of a display module provided by an exemplary embodiment of the present application under different brightness scenes;

[0037] Fig. 9 The figure shows the data comparison result of the grayscale voltage in the related art and the grayscale voltage in this embodiment. DETAILED DESCRIPTION

[0038] In the related art, in the driving method of the display module, in order to ensure that the display panel displays normally in all brightness scenes, the gate driving circuit includes a driving voltage signal input terminal, and the driving voltage signal includes a high-level voltage signal (VGH) and a low-level voltage signal (VGL). VGH / VGL are set to the same voltage, which is the maximum voltage applicable to all brightness scenes. However, in this voltage design scheme, a higher VGL / VGH voltage scheme is also used in low-brightness scenes, resulting in power consumption loss.

[0039] The display module, driving method thereof and display device provided in the present application are intended to solve the above technical problems of the related art.

[0040] The display module and its driving method and the display device in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features in the following embodiments can complement or be combined with each other.

[0041] like Figure 1 As shown, this embodiment provides a display module, which includes a display panel, a controller, and a memory; the display panel includes a plurality of sub-pixels, a plurality of pixel circuits, and a gate driving circuit, and the sub-pixels are connected to corresponding pixel circuits; the gate driving circuit includes a driving voltage signal input terminal and an output terminal; each pixel circuit is connected to the output terminal; the memory stores a first mapping relationship between a target brightness of the display panel and a driving voltage signal of the gate driving circuit and a second mapping relationship between the target brightness of the display panel and a gamma curve, and when the first target brightness of the display panel is less than the second target brightness of the display panel, the absolute value of the driving voltage signal corresponding to the first target brightness determined in the first mapping relationship is less than the absolute value of the driving voltage signal corresponding to the second target brightness;

[0042] The controller is configured to: determine a target driving voltage signal of a gate driving circuit corresponding to the target brightness according to the target brightness of the display panel and a first mapping relationship, determine a target gamma curve corresponding to the target brightness according to the target brightness of the display panel and a second mapping relationship, and determine a target data voltage of a pixel circuit corresponding to each sub-pixel according to the acquired image data and the target gamma curve; control the driving voltage received by the gate driving circuit to be the target driving voltage signal, and control the data voltage received by the pixel circuit corresponding to each sub-pixel to be the target data voltage.

[0043] The display module in this embodiment can be realized that, in different target brightness scenes of the display panel, the controller can determine the gate driving voltage at the corresponding target brightness according to the first mapping relationship stored in the memory, and when the first target brightness of the display panel is less than the second target brightness of the display panel, the absolute value of the driving voltage signal corresponding to the first target brightness determined in the first mapping relationship is less than the absolute value of the driving voltage signal corresponding to the second target brightness, compared with the use of the same fixed gate driving voltage in different brightness scenes in the related art, the power consumption of the gate driving voltage in the low brightness display scene can be reduced, and the controller can obtain the corresponding target gamma curve according to the second mapping relationship stored in the memory, and determine the target data voltage of the pixel circuit corresponding to each sub-pixel according to the acquired image data and the target gamma curve, and the gate driving circuit can use different driving voltage signals under different target brightness, while ensuring that the display panel can reach the corresponding target brightness. It has been verified by experiments that in this embodiment, under different target brightness, the power consumption of the gate driving voltage of the display module in the low brightness scene of the display panel is significantly reduced, and the corresponding data voltage changes less, thereby reducing the overall power consumption of the display module.

[0044] In some embodiments, the pixel circuit includes a plurality of thin film transistors and at least one capacitor. The number of thin film transistors may be 2, 3, 4, 5, 6, 7, 8, etc. The number of capacitors may be 1 or 2.

[0045] In one embodiment, Figure 2 As shown, the pixel circuit includes a capacitor Cst and eight transistors (transistors T1 to T8) and a plurality of signal input terminals, wherein the transistor T2 is a compensation transistor and the transistor T4 is a switch transistor.

[0046] In one embodiment, Figure 3 The gate driving circuit shown includes a start pulse signal (STV) input terminal, a clock signal (CK, CB) input terminal, a high level voltage signal (VGH) input terminal, a low level voltage signal (VGL) input terminal, a plurality of thin film transistors (M1-M12), a plurality of capacitors (C1-C3) and an output terminal OUT1. Figure 4The gate drive circuit shown includes a start pulse signal (IN) input terminal, a clock signal (CK, CB) input terminal, a high level voltage signal (VGH) input terminal, a low level voltage signal (VGL) input terminal, a plurality of thin film transistors (M1-M8), a plurality of capacitors (C1-C2) and an output terminal OUT2. Figure 3 The output terminal OUT1 of the gate drive circuit shown in FIG. Figure 2 The gate of the transistor T2 of the pixel circuit shown is electrically connected, as shown in FIG. Figure 4 The output terminal OUT2 of the gate drive circuit shown in FIG. Figure 2 The gate of the transistor T4 of the pixel circuit shown is electrically connected to jointly control the gates of the transistors T2 and T4 of the pixel circuit to receive signals output by the corresponding gate driving circuits, thereby controlling the sub-pixel to emit light.

[0047] In some embodiments, the pixel circuit includes a target transistor, the gate of the target transistor is connected to the output terminal, wherein the absolute value of the driving voltage signal of the gate driving circuit is: when the display panel is at the target brightness, the gate of the target transistor of the pixel circuit connected to the gate driving circuit is normally turned on, and the absolute value of the gate driving voltage signal required for the gate to be normally turned on. In this embodiment, the gate driving voltage signal is sufficient to turn on the gate, which can reduce power consumption while normally driving the display panel.

[0048] In some embodiments, when the brightness of the display panel is the target brightness, the minimum absolute value of the gate drive voltage signal required for the gate of the target transistor of the pixel circuit connected to the gate drive circuit to be normally turned on can be obtained by performing simulation tests on the display module. In some examples, the minimum absolute value VGL of VGL / VGH of multiple display modules of the same type in the same brightness scene can be measured by simulation. min / VGH min , select the multiple VGLs obtained by measurement min / VGH min The maximum value among them is used as the driving voltage signal corresponding to the target brightness in the first mapping relationship.

[0049] In some embodiments, the absolute value of the driving voltage signal of the gate driving circuit is: when the brightness of the display panel is the target brightness, the sum of the minimum absolute value of the gate driving voltage signal required for the gate of the target transistor of the pixel circuit connected to the gate driving circuit to be normally turned on and the compensation voltage, and the compensation voltage ranges from 0.1 to 0.2 V. In this embodiment, in order to improve the reliability of the normal operation of the circuit, this embodiment adds a compensation voltage on the basis of the value obtained by the sampling test to ensure the minimum value of the driving voltage signal that adapts to more display panels in the corresponding target brightness scene.

[0050] In some embodiments, the compensation voltage may be 0.1 V, 0.15 V, and 0.2 V. For example, the minimum value VGL of the absolute values ​​of multiple VGL / VGH obtained by sampling test min / VGH min The maximum value in VGL max / VGH max , then the absolute value of the gate drive circuit drive voltage signal is VGL max / VGH max A compensation voltage value is added on the basis of the gate drive circuit. For example, when the compensation voltage is 0.1V, the absolute value of the driving voltage signal of the gate drive circuit is VGL. max / VGH max +0.1V.

[0051] In some embodiments, the target transistor may be a switch transistor or a compensation transistor of a pixel circuit. Figure 2 The target transistor of the pixel circuit shown is the transistor T2 or the transistor T4.

[0052] In some embodiments, the driving voltage signal input terminal includes a high level voltage input terminal and a low level voltage input terminal, and the driving voltage signal includes a high level voltage signal VGH and a low level voltage signal VGL, wherein:

[0053] The negative value of the low-level voltage signal corresponding to the first target brightness is smaller than the negative value of the low-level voltage signal corresponding to the second target brightness.

[0054] In this embodiment, the low-level voltage signal is a negative voltage. In an example, the first target brightness is 10 nit (nit), the second target brightness is 500 nit, and the value of the low-level voltage signal corresponding to the first target brightness is -7.5 V. When the display panel is at the first target brightness, the minimum value VGL of the absolute values ​​of multiple VGL / VGH obtained by simulating the display panel is min / VGH min The maximum value of is 7.3V, then the minimum value of the absolute value of the gate drive voltage signal required for the gate of the target transistor of the pixel circuit connected to the gate drive circuit to be normally turned on is 7.3V plus a compensation voltage of 0.2V, that is, 7.5V. The value of the low-level voltage signal corresponding to the second target brightness is -9.5V. Among them, when the display panel is the second target brightness, the minimum value VGL of the absolute values ​​of multiple VGL / VGH obtained by simulating the display panel is min / VGH minThe maximum value of is 9.3V, then the minimum value of the absolute value of the gate drive voltage signal required for the gate of the target transistor of the pixel circuit connected to the gate drive circuit to be normally turned on is 9.3V plus a compensation voltage of 0.2V, that is, 9.5V.

[0055] In some embodiments, the driving voltage signal input terminal includes a high-level voltage input terminal and a low-level voltage input terminal, the driving voltage signal includes a high-level voltage signal and a low-level voltage signal, and the high-level voltage signal corresponding to the first target brightness is less than the high-level voltage signal corresponding to the second target brightness. In an example, the first target brightness is 10nit, the second target brightness is 500nit, the value of the high-level voltage signal corresponding to the first target brightness is 5V, and the value of the high-level voltage signal corresponding to the second target brightness is 10V.

[0056] In some embodiments, the driving voltage signal input terminal includes a high level voltage input terminal and a low level voltage input terminal, and the driving voltage signal includes a high level voltage signal and a low level voltage signal, wherein:

[0057] The negative value of the low-level voltage signal corresponding to the first target brightness is smaller than the negative value of the low-level voltage signal corresponding to the second target brightness; the high-level voltage signal corresponding to the first target brightness is smaller than the high-level voltage signal corresponding to the second target brightness. In this embodiment, the absolute values ​​of the high-level voltage signal and the low-level voltage signal are reduced at the same time, which can reduce the power consumption of the high-voltage power supply and the power consumption of the low-voltage power supply at the same time.

[0058] In some embodiments, in the first mapping relationship, the first target brightness is a first target brightness range, the second target brightness is a second target brightness range, and the maximum value of the first target brightness range is less than the minimum value of the second target brightness range of the display panel. The first mapping relationship may include a correspondence between multiple target brightness ranges and corresponding driving voltage signals, and the second mapping relationship may include a correspondence between multiple target brightness ranges and corresponding gamma curves. Such a setting helps to reduce the memory occupied by the first mapping relationship and the second mapping relationship.

[0059] This embodiment can further improve the reliability of normal operation of the pixel circuit. In one example, simulation tests show that the pixel circuit can work normally when VGL is less than -8.8V at 1200nit, and the pixel circuit can work normally when VGL is less than -6.8V at 250nit. The VGL of the display panel can be set to -9.5v at 250-1800nit, and to -7.5v at 2-250nit.

[0060] In some embodiments, the controller is further configured to determine the target brightness according to the acquired image data. Specifically, the image data includes the grayscale value of each sub-pixel of the display panel, and the target brightness of the display panel can be determined according to the grayscale values ​​of all sub-pixels.

[0061] Based on the same inventive concept, this embodiment further provides a display device, including the aforementioned display module and a housing. Therefore, the display device in this embodiment has all the beneficial effects of the aforementioned display module, which will not be described in detail here.

[0062] Based on the same inventive concept, this embodiment further provides a method for driving a display module, which is applied to the controller of the display module as described above. The method includes:

[0063] Step 100: Determine the target brightness of the display panel;

[0064] Step 200: determining a target driving voltage signal of a gate driving circuit corresponding to the target brightness according to the target brightness of the display panel and the first mapping relationship, determining a target gamma curve corresponding to the target brightness according to the target brightness of the display panel and the second mapping relationship, and determining a target data voltage of a pixel circuit corresponding to each sub-pixel according to the acquired image data and the target gamma curve;

[0065] Step 300: Control the driving voltage received by the gate driving circuit to be a target driving voltage signal, and control the data voltage received by the pixel circuit corresponding to each sub-pixel to be a target data voltage.

[0066] In this embodiment, the driving voltage received by the gate driving circuit of the display panel is regulated by the first mapping relationship, and the data voltage received by the pixel circuit of the display panel is regulated by the second mapping relationship. It has been verified through experiments that when the display panel is in a low-brightness scenario, the power consumption of the driving voltage is reduced while the change in the data voltage is small and can be ignored, thereby reducing the overall power consumption of the display module.

[0067] In some embodiments, the first mapping relationship and the second mapping relationship are obtained by performing simulation tests on the display module; after the first mapping relationship and the second mapping relationship are obtained, they are burned into a memory.

[0068] In this embodiment, the controller is convenient for directly calling the first mapping relationship and the second mapping relationship stored in the memory when controlling the display panel to display.

[0069] In some embodiments, the process of performing simulation test on the display module to obtain the first mapping relationship and the second mapping relationship may be as follows:

[0070] First, a simulation test is performed on the display module to determine the value of the driving voltage signal corresponding to each target brightness, and a first mapping relationship is obtained according to the value of each target brightness and its corresponding driving voltage signal; wherein the absolute value of the driving voltage signal of the gate driving circuit is: when the display panel is at the target brightness, the gate of the switching transistor of the pixel circuit connected to the gate driving circuit is normally opened and closed. The minimum value of the absolute value of the voltage signal required; or, the absolute value of the driving voltage signal of the gate driving circuit is: when the display panel is at the target brightness, the minimum value of the absolute value of the voltage signal required for the gate of the switching transistor of the pixel circuit connected to the gate driving circuit to normally open and close and the margin voltage, and the range of the margin voltage is 0.1 to 0.2V.

[0071] Subsequently, a simulation test is performed on the display module, and a gamma curve corresponding to each target brightness is determined according to the value of each target brightness and the corresponding driving voltage signal, so as to obtain a second mapping relationship.

[0072] In this embodiment, the first mapping relationship between the driving voltage signal and the target brightness of the display panel can be obtained through simulation testing, which is simple to operate and highly feasible.

[0073] In some embodiments, the driving voltage signal input terminal includes a high level voltage input terminal and a low level voltage input terminal, and the driving voltage signal includes a high level voltage signal and a low level voltage signal, wherein the negative value of the low level voltage signal corresponding to the first target brightness is less than the negative value of the low level voltage signal corresponding to the second target brightness.

[0074] In some embodiments, the driving voltage signal input terminal includes a high level voltage input terminal and a low level voltage input terminal, and the driving voltage signal includes a high level voltage signal and a low level voltage signal, wherein the high level voltage signal corresponding to the first target brightness is less than the high level voltage signal corresponding to the second target brightness.

[0075] like Figure 2 FIG. 1 is a circuit topology diagram of the pixel circuit in this embodiment, wherein transistor T2 is a compensation transistor and transistor T4 is a switch transistor. Figure 3 The example in this embodiment is shown as Figure 2 The gate of the transistor T2 of the pixel circuit shown is electrically connected to the gate driving circuit, and the output terminal OUT of the gate driving circuit is connected to Figure 2 The gate of the transistor T2 of the pixel circuit is connected to the gate of the transistor T2, and the gate driving circuit includes a high level voltage input terminal VGH and a low level voltage input terminal VGL. Figure 4 In the embodiment shown Figure 2 The gate of the transistor T4 of the pixel circuit shown is electrically connected to a gate driving circuit, and the gate driving circuit includes a high-level voltage input terminal VGH and a low-level voltage input terminal VGL. Figure 3The high level voltage input terminal VGH and the low level voltage input terminal VGL of the gate drive circuit shown in FIG. Figure 4 The high level voltage input terminal VGH and the low level voltage input terminal VGL are shown to be the same.

[0076] like Figure 5 FIG. 1 is a timing diagram of a low-level signal input to the gate of each transistor of the pixel circuit in this embodiment. Figure 6 The figure shows the simulation result of the Vgs voltage of the T2 transistor corresponding to different VGL of the display panel in the 1200nit scenario in this embodiment. Figure 6 The figure shows only the simulation result of obtaining the driving voltage signal corresponding to 1200 nit in the first mapping relationship in this embodiment.

[0077] Figure 7 Shown and Figure 8 The figures show the power consumption comparison of the display module of the related technology and the present embodiment when the brightness is 500 nit. Figure 7 and Figure 8 It can be seen that the technical solution provided by this embodiment reduces the power consumption from the original 28.3mW to 22.575mW under 500nit. It can be seen that this embodiment can save about 6mW of VGL circuit power consumption under 2-250nit brightness. It can be seen that the display panel provided by the embodiment of the present application can significantly reduce the power consumption in low-brightness scenes.

[0078] Fig. 9 The figure shows the data comparison between the grayscale voltage of the display module of the related art and the display module provided by the embodiment of the present application at the same target brightness and the grayscale voltage in the embodiment. Fig. 9 The figures show the computer initial values ​​corresponding to the grayscale voltages of sub-pixels of different colors located in different areas. Fig. 9 As shown, it can be seen that the grayscale voltage in the related art is slightly different from the grayscale voltage in this embodiment, because the data voltage is the voltage actually applied to the pixel electrode selected from the grayscale voltage. Therefore, the difference in power consumption of the data voltage in the display module provided by this embodiment and the display module in the related art is small and can be ignored. It can be seen that while the power consumption of the gate driving voltage is significantly reduced in this embodiment, the power consumption of the data voltage changes slightly, and the overall power consumption of the display module is reduced.

[0079] The embodiment of the display module provided in the embodiment of the present application and the embodiment of the driving method of the display module belong to the same inventive concept, and the description of relevant details and beneficial effects can be referred to each other and will not be repeated here.

[0080] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

Claims

1. A display module, It is characterized in that The display module includes a display panel, a controller, and a memory; the display panel includes a plurality of sub-pixels, a plurality of pixel circuits, and a gate driving circuit, and the sub-pixels are connected to the corresponding pixel circuits; the gate driving circuit includes a driving voltage signal input terminal and an output terminal; each of the pixel circuits is connected to the output terminal; the memory stores a first mapping relationship between a target brightness of the display panel and a driving voltage signal of the gate driving circuit and a second mapping relationship between the target brightness of the display panel and a gamma curve, and when the first target brightness of the display panel is less than the second target brightness of the display panel, the absolute value of the driving voltage signal corresponding to the first target brightness determined according to the first mapping relationship is less than the absolute value of the driving voltage signal corresponding to the second target brightness; The controller is configured to: determine a target driving voltage signal of a gate driving circuit corresponding to the target brightness according to the target brightness of the display panel and the first mapping relationship, determine a target gamma curve corresponding to the target brightness according to the target brightness of the display panel and the second mapping relationship, and determine a target data voltage of a pixel circuit corresponding to each sub-pixel according to the acquired image data and the target gamma curve; control the driving voltage signal received by the gate driving circuit to be a target driving voltage signal, and control the data voltage received by the pixel circuit corresponding to each sub-pixel to be a target data voltage.

2. The display module according to claim 1, It is characterized in that The pixel circuit comprises a target transistor, a gate of which is connected to the output terminal, wherein: The absolute value of the driving voltage signal of the gate driving circuit is: when the brightness of the display panel is the target brightness, the minimum value of the absolute value of the gate driving voltage signal required for the gate of the target transistor of the pixel circuit connected to the gate driving circuit to be normally turned on; Or, the absolute value of the driving voltage signal of the gate driving circuit is: when the brightness of the display panel is the target brightness, the sum of the minimum absolute value of the gate driving voltage signal required for the gate of the target transistor of the pixel circuit connected to the gate driving circuit to be normally turned on and the compensation voltage, and the range of the compensation voltage is 0.1~0.2V.

3. The display module according to claim 1, It is characterized in that The driving voltage signal input terminal includes a high level voltage input terminal and a low level voltage input terminal, and the driving voltage signal includes a high level voltage signal and a low level voltage signal, wherein: The negative value of the low-level voltage signal corresponding to the first target brightness is smaller than the negative value of the low-level voltage signal corresponding to the second target brightness; And / or, the high-level voltage signal corresponding to the first target brightness is smaller than the high-level voltage signal corresponding to the second target brightness.

4. The display module according to claim 1, It is characterized in that In the first mapping relationship, the first target brightness is a first target brightness range, the second target brightness is a second target brightness range, and the maximum value of the first target brightness range is less than the minimum value of the second target brightness range of the display panel.

5. The display module according to claim 1, It is characterized in that The controller is further configured to determine target brightness according to the acquired image data.

6. A display device, It is characterized in that It comprises the display module as claimed in any one of claims 1 to 5.

7. A method for driving a display module, applied to the controller of the display module according to any one of claims 1 to 5, It is characterized in that The driving method comprises: determining a target brightness of the display panel; Determining a target driving voltage signal of a gate driving circuit corresponding to the target brightness according to the target brightness of the display panel and the first mapping relationship, determining a target gamma curve corresponding to the target brightness according to the target brightness of the display panel and the second mapping relationship, and determining a target data voltage of a pixel circuit corresponding to each sub-pixel according to the acquired image data and the target gamma curve; The driving voltage received by the gate driving circuit is controlled to be a target driving voltage signal, and the data voltage received by the pixel circuit corresponding to each sub-pixel is controlled to be a target data voltage.

8. The driving method of the display module according to claim 7, It is characterized in that The pixel circuit includes a target transistor, and the gate of the target transistor is connected to the output end, wherein the absolute value of the driving voltage signal of the gate driving circuit is: when the brightness of the display panel is the target brightness, the gate of the target transistor of the pixel circuit connected to the gate driving circuit is normally turned on, and the minimum value of the absolute value of the gate driving voltage signal required; or, the absolute value of the driving voltage signal of the gate driving circuit is: when the brightness of the display panel is the target brightness, the gate of the target transistor of the pixel circuit connected to the gate driving circuit is normally turned on, and the sum of the minimum value of the absolute value of the gate driving voltage signal required and the compensation voltage, and the range of the compensation voltage is 0.1 to 0.2V.

9. The method for driving a display module according to claim 7, It is characterized in that The driving voltage signal input terminal includes a high level voltage input terminal and a low level voltage input terminal, and the driving voltage signal includes a high level voltage signal and a low level voltage signal, wherein: The negative value of the low-level voltage signal corresponding to the first target brightness is smaller than the negative value of the low-level voltage signal corresponding to the second target brightness; And / or, the high-level voltage signal corresponding to the first target brightness is smaller than the high-level voltage signal corresponding to the second target brightness.

10. The method for driving a display module according to claim 7, It is characterized in that Determining the target brightness of the display panel includes: The target brightness of the display panel is determined according to the acquired image data.

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