Method for adjusting brightness of display panel, brightness adjusting device and display device

Abstract

This application provides a method, a brightness adjustment device, and a display device for adjusting the brightness of a display panel. The method includes: adjusting the range of gamma register values; configuring a first mapping relationship between gamma register values ​​and grayscale values, such that the gamma register value corresponding to the maximum grayscale value in each first mapping relationship is a first gamma register value; configuring a second mapping relationship between the average pixel value of the display panel and the first gamma register value, such that the brightness of the display panel at a target low average pixel value is greater than the brightness of the display panel at the target low average pixel value when not adjusted; acquiring a real-time average pixel value; acquiring a first mapping relationship matching the real-time average pixel value based on the real-time average pixel value and the second mapping relationship; acquiring a first grayscale value corresponding to the real-time average pixel value; and controlling the display panel to display the brightness at the first grayscale value based on the first grayscale value and the first mapping relationship. This application can significantly improve the brightness of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a method for adjusting the brightness of a display panel, a brightness adjustment device, and a display device. Background Technology

[0002] Average Picture Level (APL) is the average relative brightness of a subpixel. In the field of display technology, display panels have various display modes. In some display modes, users want the display panel to have higher brightness at a lower APL for better image display. However, in existing technologies, when the APL is low, the brightness increase is only slightly affected by the voltage drop of the display panel itself, making it difficult to meet customer needs. Therefore, a solution is urgently needed. Summary of the Invention

[0003] In view of the above, embodiments of this application provide a method for adjusting the brightness of a display panel, a brightness adjustment device, and a display device to solve the above problems.

[0004] In a first aspect, embodiments of this application provide a method for adjusting the brightness of a display panel, the method comprising:

[0005] Adjust the range of gamma register values, configure at least one first mapping relationship between gamma register values ​​and grayscale values, such that the gamma register value corresponding to the maximum grayscale value in each first mapping relationship is the first gamma register value, and the gamma register value corresponding to the maximum grayscale value when not adjusted is the second gamma register value, and at least one first gamma register value is greater than the second gamma register value.

[0006] Configure a second mapping relationship between the average pixel value of the display panel and the first gamma register value, so that the brightness of the display panel under the target low average pixel value is the first brightness, and the brightness of the display panel under the target low average pixel value is the second brightness when it is not adjusted, and the first brightness is greater than the second brightness.

[0007] Obtain the real-time average pixel value of the display panel, and obtain a first mapping relationship that matches the real-time average pixel value based on the real-time average pixel value and the second mapping relationship;

[0008] Obtain the first grayscale value corresponding to the real-time average pixel value, and control the display panel to display the brightness corresponding to the real-time average pixel value based on the first mapping relationship between the first grayscale value and the real-time average pixel value.

[0009] In one implementation of the first aspect, the plurality of first gamma register values ​​include first sub-gamma register values, second sub-gamma register values, and third sub-gamma register values ​​with different values, wherein the first sub-gamma register value is greater than the second sub-gamma register value, and the third sub-gamma register value is between the first and second sub-gamma register values; configuring a second mapping relationship between the average pixel value of the display panel and the first gamma register values ​​includes:

[0010] Set a first average pixel threshold and a second average pixel threshold, wherein the first average pixel threshold is less than the second average pixel threshold;

[0011] The average pixel value is configured to correspond to the first sub-gamma register value if it is not greater than the first average pixel threshold, the average pixel value is configured to correspond to the second sub-gamma register value if it is not less than the second average pixel threshold, and the average pixel value is configured to correspond to the third sub-gamma register value if it is greater than the first average pixel threshold and less than the second average pixel threshold.

[0012] In one implementation of the first aspect, the value of the second sub-gamma register is not less than the value of the second gamma register, and the target low average pixel value is less than the second average pixel threshold.

[0013] In one implementation of the first aspect, the second average pixel threshold is no greater than 50%.

[0014] In one implementation of the first aspect, the first average pixel threshold is not less than 5%.

[0015] In one implementation of the first aspect, the third sub-gamma register value is GammaLV13, the first sub-gamma register value is GammaLV11, the second sub-gamma register value is GammaLV12, the first average pixel threshold is APL1, the second average pixel threshold is APL2, and the average pixel value between the first average pixel threshold APL1 and the second average pixel threshold APL2 is APLn.

[0016] Among them, GammaLV13=(GammaLV11-GammaLV12)*(APLn-APL2) / (APL1-APL2)+GammaLV12

[0017] In one implementation of the first aspect, the method further includes:

[0018] Under different average pixel values, configure a third mapping relationship between the dimming brightness value and the gamma register value of the display panel; in each third mapping relationship, the gamma register value corresponding to the maximum dimming brightness value is the gamma register value under the first gray level value;

[0019] Obtain the real-time average pixel value of the display panel, and determine a third mapping relationship that matches the real-time average pixel value based on the real-time average pixel value;

[0020] Obtain the dimming brightness value of the display panel, and control the display panel to display the brightness corresponding to the real-time average pixel value based on the third mapping relationship between the dimming brightness value and the real-time average pixel value.

[0021] In one implementation of the first aspect, the gamma register value corresponding to the dimming brightness value includes a third gamma register value, a fourth gamma register value, and a fifth gamma register value, wherein the third gamma register value is greater than the fourth gamma register value, and the fifth gamma register value is located between the third and fourth gamma register values; configuring a third mapping relationship between the dimming brightness value and the gamma register value of the display panel includes:

[0022] Set a first dimming brightness threshold and a second dimming brightness threshold, wherein the first dimming brightness threshold is greater than the second dimming brightness threshold;

[0023] Configure a dimming brightness value that is not greater than the second dimming brightness threshold to correspond to the fourth gamma register value, configure a dimming brightness value that is not less than the first dimming brightness threshold to correspond to the third gamma register value, and configure a dimming brightness value that is greater than the second dimming brightness threshold and less than the first dimming brightness threshold to correspond to the fifth gamma register value.

[0024] In one implementation of the first aspect, the display panel includes a normal dimming mode and a high-brightness dimming mode, wherein the dimming brightness value in the high-brightness dimming mode is greater than the dimming brightness value in the normal dimming mode, the second dimming brightness threshold is the maximum dimming brightness value in the normal dimming mode, and the first dimming brightness threshold is the maximum dimming brightness value in the high-brightness dimming mode.

[0025] In one implementation of the first aspect, the third gamma register value is the same as the gamma register value corresponding to the maximum dimming brightness value, and the fourth gamma register value is the same as the second gamma register value.

[0026] In one implementation of the first aspect, the third gamma register value is GammaLV3, the fourth gamma register value is GammaLV4, the fifth gamma register value is GammaLV5, the first dimming brightness threshold is DBV1, the second dimming brightness threshold is DBV2, and the dimming brightness value between the first dimming brightness threshold DBV1 and the second dimming brightness threshold DBV2 is DBVx.

[0027] Among them, GammaLV5=(DBVx-DBV2) / (DBV1-DBV2)*(GammaLV3-GammaLV4)+GammaLV4

[0028] In one implementation of the first aspect, the third gamma register value and the fourth gamma register value correspond to the same gamma curve.

[0029] In one implementation of the first aspect, multiple first gamma register values ​​correspond to the same gamma curve.

[0030] Secondly, embodiments of this application provide a brightness adjustment device for performing the method as provided in the first aspect.

[0031] In one implementation of the second aspect, the apparatus includes:

[0032] The average pixel value acquisition unit is used to acquire the real-time average pixel value of the display panel.

[0033] The adjustment unit is electrically connected to the average pixel value acquisition unit and is used to receive the real-time average pixel value of the display panel and obtain the gamma register value corresponding to the real-time average pixel value under different gray levels according to the real-time average pixel value and the preset second mapping relationship and first mapping relationship.

[0034] The grayscale acquisition unit is used to acquire the first grayscale value corresponding to the real-time average pixel value;

[0035] The control unit is used to control the display panel to display the brightness corresponding to the real-time average pixel value based on the first grayscale value and the gamma register value corresponding to the real-time average pixel value under the first grayscale value.

[0036] In one implementation of the second aspect, the device further includes a dimming unit for controlling the dimming brightness value of the display panel; the control unit is also used to control the brightness of the display panel corresponding to the real-time average pixel value according to the dimming brightness value.

[0037] Thirdly, embodiments of this application provide a display device, including a display panel and a brightness adjustment device as provided in the second aspect.

[0038] In this embodiment, by adjusting the range of gamma register values, a larger gamma register value corresponds to a higher display panel brightness. This allows for a larger gamma register value corresponding to a lower average pixel value, thereby increasing the display panel's brightness at low average pixel values ​​and meeting user brightness requirements. Furthermore, different gamma register values ​​can be set for different low average pixel values, enabling the display panel to display different maximum brightness levels at varying low average pixel values, thus satisfying diverse user needs.

[0039] Furthermore, this application can also control the brightness of the display panel when displaying different gray levels under the same average pixel value, making it possible to increase the brightness of the display panel under each gray level value, which is conducive to further meeting the user's needs for display panel brightness. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 A flowchart illustrating a method for adjusting the brightness of a display panel, as provided in this application embodiment;

[0042] Figure 2 This application provides a schematic diagram illustrating the correspondence between gamma register values ​​and display panel brightness in an embodiment of the present application.

[0043] Figure 3 A schematic diagram illustrating a first mapping relationship provided in an embodiment of this application;

[0044] Figure 4 A flowchart illustrating a method for configuring a second mapping relationship provided in an embodiment of this application;

[0045] Figure 5 A schematic diagram illustrating a second mapping relationship provided in an embodiment of this application;

[0046] Figure 6 A flowchart illustrating another method for adjusting the brightness of a display panel provided in this application embodiment;

[0047] Figure 7 A schematic diagram illustrating a third mapping relationship provided in an embodiment of this application;

[0048] Figure 8 A flowchart illustrating a method for configuring a third mapping relationship provided in an embodiment of this application;

[0049] Figure 9 A schematic diagram of a brightness adjustment device provided in an embodiment of this application;

[0050] Figure 10 A schematic diagram of yet another brightness adjustment device provided in the embodiments of this application;

[0051] Figure 11 This is a schematic diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0052] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0053] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0054] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0055] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0056] In the field of display technology, the Average Picture Level (APL) is the average relative brightness of a subpixel. In some operating modes of a display panel, users desire higher brightness even with a lower APL for better image display. However, in existing technologies, when the APL is low, the brightness increase is limited due to voltage drop, failing to meet user needs.

[0057] For example, when APL = 100%, the display panel brightness is 800 nits. Adjusting APL to 5% increases the brightness to approximately 1000 nits, which cannot meet users' higher brightness demands (1300 nits or more) when APL is low. Furthermore, because different display panels typically have different voltage drop characteristics, the brightness increase varies among different panels when APL is low. In other words, in existing technology, when APL is low, not only is the brightness increase of the display panel limited, but it is also uncontrollable.

[0058] In view of this, the inventors of this application provide a method for adjusting the brightness of a display panel, which enables the display panel to have a large brightness when the APL is low, so as to meet various user needs.

[0059] like Figure 1 As shown, Figure 1 A flowchart of a method for adjusting the brightness of a display panel is provided in this application embodiment. The method includes:

[0060] Step S100: Adjust the range of gamma register values ​​and configure at least one first mapping relationship between gamma register values ​​and grayscale values, such that the gamma register value corresponding to the largest grayscale value in each first mapping relationship is the first gamma register value.

[0061] When not adjusted, the gamma register value corresponding to the maximum grayscale value is the second gamma register value, and at least one first gamma register value is greater than the second gamma register value. The second gamma register value can be the gamma register value corresponding to the maximum grayscale value in the prior art.

[0062] like Figure 2 As shown, Figure 2 This is a schematic diagram illustrating the correspondence between a gamma register value and the brightness of a display panel, provided as an embodiment of this application. In this embodiment, the larger the gamma register value, the greater the brightness of the display panel.

[0063] For example, in Figure 2 In this configuration, the gamma register values ​​corresponding to points L0, L1, L2, L3, and L4 can be the first gamma register values ​​in each of the first mapping relationships. At this time, the display panel brightness corresponding to points L0, L1, L2, L3, and L4 is the maximum brightness that the display panel can achieve under the maximum grayscale value. Specifically, the gamma register value corresponding to point L0 can be the same as the second gamma register value, and the display panel brightness corresponding to point L0 can be the same as the maximum brightness of the display panel in the prior art.

[0064] Optionally, in the first mapping relationship, the first gamma register value is GammaN, where GammaN = ExtGray + 255. 255 is the second gamma register value, and ExtGray is the added gamma register value, with a value range of 0-255. This allows for flexible setting of the number and size of the first gamma register values ​​according to the user's actual needs, enabling the display panel to show the corresponding brightness for each first gamma register value.

[0065] For example, such as Figure 3 As shown, Figure 3This is a schematic diagram of a first mapping relationship provided in an embodiment of this application. Multiple first mapping relationships can be configured, such as first mapping relationship S1, first mapping relationship S2, first mapping relationship S3, and first mapping relationship S4. In first mapping relationship S1, the range of gamma register values ​​corresponding to grayscale levels 0-255 is 0-GammaN1, where GammaN1 is the first gamma register value corresponding to a grayscale value of 255. In first mapping relationship S2, the range of gamma register values ​​corresponding to grayscale levels 0-255 is 0-GammaN2, where GammaN2 is the first gamma register value corresponding to a grayscale value of 255. In first mapping relationship S3, the range of gamma register values ​​corresponding to grayscale levels 0-255 is 0-GammaN3, where GammaN3 is the first gamma register value corresponding to a grayscale value of 255. In first mapping relationship S4, the range of gamma register values ​​corresponding to grayscale levels 0-255 is 0-GammaN4, where GammaN4 is the first gamma register value corresponding to a grayscale value of 255.

[0066] Wherein, GammaN1 can be Figure 2 The gamma register value corresponding to point L1, GammaN2 can be... Figure 2 The gamma register value corresponding to point L2, GammaN3 can be... Figure 2 The gamma register value corresponding to point L3, GammaN4 can be... Figure 2 The gamma register value corresponding to point L4 in the middle.

[0067] GammaN1-GammaN4 are all greater than the value of the second gamma register, and the brightness of the display panel corresponding to GammaN1-GammaN4 is greater than the brightness of the display panel corresponding to the value of the second gamma register.

[0068] In step S100, the range of gamma register values ​​can be increased, resulting in larger gamma register values ​​corresponding to higher display panel brightness, thereby increasing the maximum brightness that the display panel can display. Furthermore, by configuring a first mapping relationship, grayscale values ​​are correlated with gamma register values, allowing the display panel to display different brightness levels at different grayscale levels. Multiple first mapping relationships can be configured, enabling the display panel to display different maximum brightness levels when the APL (Advanced Display Probability) is different, thus meeting the varying brightness requirements of users at low APL.

[0069] Step S200: Configure a second mapping relationship between the average pixel value of the display panel and the first gamma register value, so that the brightness of the display panel under the target low average pixel value is the first brightness; when not adjusted, the brightness of the display panel under the target low average pixel value is the second brightness, and the first brightness is greater than the second brightness.

[0070] The second brightness can be the display panel brightness corresponding to the second gamma register value, and the target low average pixel value can be less than 50%.

[0071] In step S200, the first gamma register value corresponding to the target low average pixel value can be set to be greater than the second gamma register value. Based on the characteristic that the larger the gamma register value, the greater the brightness of the display panel, the first brightness of the display panel under the target low average pixel value is greater than the second brightness of the display panel under the target low average pixel value when it is not adjusted.

[0072] For example, when the target has a low average pixel value of 10%, the reference Figure 2 The second brightness of the display panel at the target low average pixel value, without adjustment, is 1000 nits. This second brightness is the maximum brightness of the display panel at the target low average pixel value without adjustment. At this time, the second gamma register value corresponding to the second brightness can be 255 (see...). Figure 2 (L0 point in the configuration). In the configured second mapping relationship, the first gamma register value corresponding to 10% of the average pixel value can be configured to be 495. When the first gamma register value is 495, the corresponding display panel brightness can be 4962 nits (see...). Figure 2 (L4 point in the middle), so that the first brightness is greater than the second brightness.

[0073] One possible implementation is that the multiple first gamma register values ​​include first sub-gamma register values, second sub-gamma register values, and third sub-gamma register values ​​with different values. The first sub-gamma register value is greater than the second sub-gamma register value, and the third sub-gamma register value is between the first and second sub-gamma register values. That is, the third sub-gamma register value can be greater than the second sub-gamma register value and less than the first sub-gamma register value.

[0074] like Figure 4 As shown, Figure 4 A flowchart of a method for configuring a second mapping relationship provided in this application embodiment, comprising configuring a second mapping relationship corresponding to the average pixel value of a display panel and the value of a first gamma register, including:

[0075] Step S201: Set a first average pixel threshold and a second average pixel threshold, wherein the first average pixel threshold is less than the second average pixel threshold.

[0076] Step S202: Configure the average pixel value that is not greater than the first average pixel threshold to correspond to the first sub-gamma register value, configure the average pixel value that is not less than the second average pixel threshold to correspond to the second sub-gamma register value, and configure the average pixel value that is greater than the first average pixel threshold and less than the second average pixel threshold to correspond to the third sub-gamma register value.

[0077] Among them, such as Figure 5 As shown, Figure 5 This is a schematic diagram of a second mapping relationship provided in an embodiment of this application. The third sub-gamma register value is GammaLV13, the first sub-gamma register value is GammaLV11, the second sub-gamma register value is GammaLV12, the first average pixel threshold is APL1, the second average pixel threshold is APL2, and the average pixel value between the first average pixel threshold and the second average pixel threshold is APLn.

[0078] The first sub-gamma register value, GammaLV11, can be a fixed gamma register value set according to user requirements. That is, the gamma register values ​​corresponding to average pixel values ​​less than or equal to the first average pixel threshold can be the same, ensuring that the maximum brightness achievable by the display panel is the same for average pixel values ​​less than or equal to the first average pixel threshold. Similarly, the second sub-gamma register value, GammaLV12, can also be a fixed gamma register value set according to user requirements. That is, the gamma register values ​​corresponding to average pixel values ​​greater than or equal to the second average pixel threshold can be the same, ensuring that the maximum brightness achievable by the display panel is the same for average pixel values ​​greater than or equal to the second average pixel threshold.

[0079] Optionally, the second sub-gamma register value GammaLV12 is not less than the second gamma register value, and the target low average pixel value is less than the second average pixel threshold APL2. Thus, among the average pixel values ​​less than the second average pixel threshold APL2, the gamma register value corresponding to each average pixel value can be greater than the second gamma register value, thereby significantly improving the maximum brightness of the display panel when the average pixel value is less than the second average pixel threshold APL2. This, in turn, enables a significant increase in the brightness of the display panel at the target low average pixel value.

[0080] Of course, the value of the second sub-gamma register, GammaLV12, can be the same as the value of the second gamma register.

[0081] Optionally, the second average pixel threshold APL2 is no greater than 50%. For example, the second average pixel threshold APL2 is between 40% and 50%. This avoids the problem that when the average pixel value is large, the corresponding gamma register value is also large, and the control module cannot provide a large voltage.

[0082] Optionally, the first average pixel threshold APL1 is not less than 5%. For example, the first average pixel threshold APL1 is between 5% and 10%.

[0083] Among the average pixel values ​​APLn located between the first average pixel threshold APL1 and the second average pixel threshold APL2, the third sub-gamma register value GammaLV13 corresponding to each average pixel value can be different, and the third sub-gamma register value GammaLV13 can be calculated using linear interpolation.

[0084] GammaLV13=(GammaLV11-GammaLV12)*(APLn-APL2) / (APL1-APL2)+GammaLV12.

[0085] This helps to reduce the configuration difficulty of the average pixel value APLn and the third sub-gamma register value GammaLV13, which are located between the first average pixel threshold APL1 and the second average pixel threshold APL2.

[0086] Step S300: Obtain the real-time average pixel value of the display panel, and obtain the first mapping relationship that matches the real-time average pixel value based on the real-time average pixel value and the second mapping relationship.

[0087] The real-time average pixel value is the average pixel value that the display panel is currently displaying. Since the second mapping relationship is a mapping between the average pixel value and the first gamma register value, the first gamma register value corresponding to the real-time average pixel value can be determined from the second mapping relationship. Therefore, based on the first gamma register value corresponding to the real-time average pixel value, the first mapping relationship matching the real-time average pixel value can be determined. That is, the gamma register value corresponding to each grayscale value under the real-time average pixel value is determined.

[0088] For example, the real-time average pixel value of the display panel is 10%. In the second mapping relationship, the 10% average pixel value is the first average pixel threshold, and its corresponding first gamma register value can be 495. Based on the first gamma register value of 495, it can be determined that in the first mapping relationship matching the 10% average pixel value, the first gamma register value corresponding to the maximum grayscale value is 495. Therefore, it can be determined that the 10% average pixel value is related to... Figure 3 The first mapping relationship S4 (in the first mapping relationship S4, the first gamma register value corresponding to the maximum gray level value is 495 corresponding to point L4) is matched. Therefore, based on the first mapping relationship S4, the gamma register value corresponding to each gray level value under 10% average pixel value can be determined.

[0089] Step S400: Obtain the first grayscale value corresponding to the real-time average pixel value, and control the display panel to display the brightness corresponding to the real-time average pixel value according to the first mapping relationship between the first grayscale value and the real-time average pixel value.

[0090] After determining the first grayscale value corresponding to the real-time average pixel value, the gamma register value corresponding to the first grayscale value can be determined according to the correspondence between the grayscale value and the gamma register value in the first mapping relationship. Thus, the brightness of the display panel corresponding to the real-time average pixel value under the first grayscale value can be determined.

[0091] Optionally, the first grayscale value is the maximum grayscale value corresponding to the real-time average pixel value. In this case, under the real-time average pixel value, the display panel displays brightness according to the first gamma register value corresponding to the real-time average pixel value.

[0092] The method provided in this application embodiment can adjust the range of gamma register values ​​so that a larger gamma register value corresponds to a larger display panel brightness. This allows for a larger gamma register value corresponding to a lower average pixel value, thereby increasing the display panel's brightness at low average pixel values ​​and meeting users' brightness requirements at these levels. Furthermore, different gamma register values ​​can be set for different low average pixel values, enabling the display panel to display different maximum brightness levels at varying low average pixel values ​​to meet diverse user needs.

[0093] Furthermore, this application can also control the brightness of the display panel when displaying different gray levels under the same average pixel value, making it possible to increase the brightness of the display panel under each gray level value, which is conducive to further meeting the user's needs for display panel brightness.

[0094] Figure 6 This is a flowchart illustrating another method for adjusting the brightness of a display panel, as provided in an embodiment of this application.

[0095] like Figure 6 As shown, in one embodiment of this application, the method for adjusting the brightness of the display panel further includes:

[0096] Step S500: Configure a third mapping relationship between the display panel's dimming brightness value (DBV) and the gamma register value under different average pixel values. In each third mapping relationship, the gamma register value corresponding to the maximum dimming brightness value is the gamma register value under the first grayscale value.

[0097] In other words, different third mapping relationships can be configured for different average pixel values. In a third mapping relationship for a given average pixel value, the gamma register value corresponding to the maximum dimming brightness value is the gamma register value corresponding to the first grayscale value under that average pixel value. This ensures that, at the maximum dimming brightness value, the display panel can display the maximum brightness corresponding to the first grayscale value under that average pixel value.

[0098] Optionally, the first grayscale value is the maximum grayscale value. In this case, in the third mapping relationship under an average pixel value, the gamma register value corresponding to the maximum dimming brightness value is the first gamma register value corresponding to the average pixel value in the second mapping relationship.

[0099] Furthermore, since the first gamma register values ​​corresponding to average pixel values ​​less than or equal to the first average pixel threshold can be the same, the third mapping relationship for average pixel values ​​less than or equal to the first average pixel threshold can be the same. Since the first gamma register values ​​corresponding to average pixel values ​​greater than or equal to the second average pixel threshold can be the same, the third mapping relationship for average pixel values ​​greater than or equal to the second average pixel threshold is the same. Among the average pixel values ​​between the first and second average pixel thresholds, different average pixel values ​​correspond to different first gamma register values, and different third mapping relationships can be configured for these average pixel values.

[0100] For example, when the first average pixel threshold is 10% and the second average pixel threshold is 50%, average pixel values ​​less than or equal to 10% can correspond to the same third mapping relationship, average pixel values ​​greater than or equal to 50% can correspond to the same third mapping relationship, and among average pixel values ​​greater than 10% and less than 50%, different average pixel values ​​can correspond to different third mapping relationships.

[0101] For example, such as Figure 7 As shown, Figure 7 This is a schematic diagram illustrating a third mapping relationship provided in an embodiment of this application. Third mapping relationships M1, M2, and M3 can be configured. Specifically, third mapping relationship M1 can be a third mapping relationship based on average pixel values ​​less than or equal to a first average pixel threshold, for example, a third mapping relationship when the average pixel value is less than or equal to 10%. Third mapping relationship M3 can be a third mapping relationship based on average pixel values ​​greater than or equal to a second average pixel threshold, for example, a third mapping relationship when the average pixel value is greater than or equal to 50%. Third mapping relationship M2 can be a third mapping relationship based on average pixel values ​​between the first and second average pixel thresholds, for example, a third mapping relationship when the average pixel value is greater than 10% and less than 50%.

[0102] It should be noted that, in Figure 7 In each of the third mapping relationships shown, the gamma register value corresponding to the maximum dimming brightness value is the first gamma register value under the maximum grayscale value.

[0103] Please refer to this article as one possible implementation. Figure 7Within the same third mapping relationship, the gamma register values ​​corresponding to the dimming brightness value DBV include the third gamma register value GammaLV3, the fourth gamma register value GammaLV4, and the fifth gamma register value GammaLV5. The third gamma register value GammaLV3 is greater than the fourth gamma register value GammaLV4, and the fifth gamma register value GammaLV5 lies between the third gamma register value GammaLV3 and the fourth gamma register value GammaLV4. That is, the fifth gamma register value GammaLV5 is greater than the fourth gamma register value GammaLV4 and less than the third gamma register value GammaLV3.

[0104] like Figure 8 As shown, Figure 8 A flowchart illustrating a method for configuring a third mapping relationship is provided in this application embodiment. Configuring a third mapping relationship between the dimming brightness value (DBV) of a display panel and the gamma register value includes:

[0105] Step S501: Set a first dimming brightness threshold DBV1 and a second dimming brightness threshold DBV2, wherein the first dimming brightness threshold DBV1 is greater than the second dimming brightness threshold DBV2.

[0106] Step S502: Configure a dimming brightness value DBV that is not greater than the second dimming brightness threshold DBV2 to correspond to the fourth gamma register value GammaLV4; configure a dimming brightness value DBV that is not less than the first dimming brightness threshold DBV1 to correspond to the third gamma register value GammaLV3; and configure a dimming brightness value DBV that is greater than the second dimming brightness threshold DBV2 and less than the first dimming brightness threshold DBV1 to correspond to the fifth gamma register value GammaLV5.

[0107] The third gamma register value, GammaLV3, is the maximum gamma register value corresponding to the first grayscale value under an average pixel value. When the first grayscale value is the maximum grayscale value of 255, the third gamma register value, GammaLV3, is the first gamma register value under an average pixel value. The third gamma register value, GammaLV3, can be a fixed gamma register value set according to user needs. That is, the gamma register value corresponding to a dimming brightness value DBV that is not less than the first dimming brightness threshold DBV1 can be the same value. Under a dimming brightness value DBV that is not less than the first dimming brightness threshold DBV1, the display panel displays the same maximum brightness under an average pixel value and at the first grayscale value.

[0108] Optionally, the first dimming brightness threshold DBV1 is the maximum dimming brightness value in the display panel.

[0109] The fourth gamma register value, GammaLV4, is the smallest gamma register value corresponding to the first grayscale value under an average pixel value. When the first grayscale value is the maximum grayscale value of 255, the fourth gamma register value, GammaLV4, is the smallest first gamma register value under an average pixel value. The fourth gamma register value, GammaLV4, can be a fixed gamma register value set according to user requirements.

[0110] Optionally, the third gamma register value GammaLV3 is the same as the gamma register value corresponding to the maximum dimming brightness value, and the fourth gamma register value GammaLV4 is the same as the second gamma register value. Of course, the fourth gamma register value GammaLV4 can be the same as the second sub-gamma register value GammaLV12 in the second mapping relationship. The display panel brightness corresponding to the fourth gamma register value GammaLV4 can be the maximum brightness of the display panel in the prior art.

[0111] Please continue to refer to this. Figure 7 The dimming value between the first dimming brightness threshold DBV1 and the second dimming brightness threshold DBV2 is DBVx. Between the first dimming brightness threshold DBV1 and the second dimming brightness threshold DBV2, the corresponding fifth gamma register value GammaLV5 can be different. The fifth gamma register value GammaLV5 can be calculated using linear interpolation.

[0112] GammaLV5=(DBVx-DBV2) / (DBV1-DBV2)*(GammaLV3-GammaLV4)+GammaLV4.

[0113] This helps to reduce the difficulty of configuring the dimming brightness value DBVx and the fifth gamma register value GammaLV5, which are between the first dimming brightness threshold DBV1 and the second dimming brightness threshold DBV2.

[0114] Optionally, the display panel includes a normal dimming mode (Nor) and a high-brightness dimming mode (HBM). For example... Figure 7 As shown, the dimming brightness value DBV under the highlight dimming mode HBM is greater than the dimming brightness value DBV under the normal dimming mode Nor. Here, the dimming brightness value DBV under the highlight dimming mode HBM is greater than the dimming brightness value DBV under the normal dimming mode Nor, which means that the minimum dimming brightness value under the highlight dimming mode HBM is greater than or equal to the maximum dimming brightness value under the normal dimming mode Nor.

[0115] Among them, the second dimming brightness threshold DBV2 is the maximum dimming brightness value Normax under the normal dimming mode Nor, and the first dimming brightness threshold DBV1 is the maximum dimming brightness value HBNmax under the high-brightness dimming mode HBM.

[0116] It is understood that in step S500, the maximum dimming brightness value refers to the maximum dimming brightness value HBNmax under the high-brightness dimming mode HBM.

[0117] In this implementation, when the display panel is in High Brightness Mode (HBM), the brightness of the display panel can be controlled by adjusting the brightness value. This ensures that the brightness of the display panel is increased at the target low average pixel value, while further meeting the user's dimming needs.

[0118] It should be noted that when configuring the third mapping relationship, for the third mapping relationship with an average pixel value greater than or equal to the second average pixel threshold, it is possible to configure each dimming brightness value in the highlight dimming mode to correspond to the fourth gamma register value (e.g., Figure 7 The third mapping relationship M3 in the diagram is used to ensure that the brightness of the display panel is not too high when the average pixel value is high, thus preventing the control module from being unable to provide a large voltage.

[0119] Optionally, the third gamma register value GammaLV3 and the fourth gamma register value GammaLV4 correspond to the same gamma curve. That is, among the third gamma register value GammaLV3 and the fourth gamma register value GammaLV4, the larger the gamma register value, the greater the brightness of the corresponding display panel. For example, the third gamma register value GammaLV3 and the fourth gamma register value GammaLV4 correspond to the gamma 2.2 curve.

[0120] LG1 = LG2 * (GammaLV4 / GammaLV3)^2.2. Where LG1 is the display panel brightness corresponding to the fourth gamma register value GammaLV4, and LG2 is the display panel brightness corresponding to the third gamma register value GammaLV3.

[0121] Of course, the fifth gamma register value GammaLV5 can correspond to the same gamma curve as the third gamma register value GammaLV3 and the fourth gamma register value GammaLV4.

[0122] It should be noted that, in Figure 7 In the normal dimming mode Nor shown, although the gamma register values ​​corresponding to the dimming brightness values ​​are the same, dimming can be achieved by using different display panel brightness values ​​corresponding to the same gamma register value. The specific method is the same as the existing technology, and will not be elaborated here.

[0123] Step S600: Obtain the real-time average pixel value of the display panel, and determine a third mapping relationship that matches the real-time average pixel value.

[0124] The real-time average pixel value is the average pixel value that the display panel is currently displaying. Since the third mapping relationship corresponds to the average pixel value, the matching third mapping relationship can be determined based on the average pixel value.

[0125] Step S700: Obtain the dimming brightness value of the display panel, and control the display panel to display the brightness corresponding to the real-time average pixel value according to the third mapping relationship between the dimming brightness value and the real-time average pixel value.

[0126] After determining the dimming brightness value, the gamma register value corresponding to the dimming brightness value can be determined based on the third mapping relationship under the real-time average pixel value, thereby enabling the display panel to display brightness at different dimming brightness values ​​under the real-time average pixel value.

[0127] In the method provided in this application embodiment, a third mapping relationship under the average pixel value can be configured so that the gamma register value corresponding to a larger dimming brightness value is larger. This allows the dimming brightness value of the display panel to be set to be larger under a smaller average pixel value, so that the display panel can achieve a larger brightness under a smaller average pixel value, thereby meeting the user's brightness requirements for the display panel.

[0128] Furthermore, the brightness of the display panel can be controlled at lower average pixel values ​​by adjusting the dimming brightness value, which helps to further meet the dimming needs of users.

[0129] In one embodiment of this application, multiple first gamma register values ​​correspond to the same gamma curve. That is, when configuring multiple first mapping relationships, the first gamma register values ​​in each first mapping relationship correspond to the same gamma curve.

[0130] For example, such as Figure 2 As shown, the gamma register values ​​corresponding to points L0-L4 can be the first gamma register values ​​in each of the first mapping relationships. Points L0-L4 all fall on the same gamma curve. This gamma curve can be a gamma 2.2 curve.

[0131] In this embodiment, multiple first gamma register values ​​are set to correspond to the same gamma curve, so there is no need to configure multiple gamma curves in the display panel, which helps to simplify the gamma architecture in the display panel and reduce the design difficulty of the gamma architecture.

[0132] Figure 9 This is a schematic diagram of a brightness adjustment device provided in an embodiment of this application.

[0133] This application also provides a brightness adjustment device for performing the method provided in the above embodiments. Figure 9 As shown, the brightness adjustment device 01 includes:

[0134] The average pixel value acquisition unit 11 is used to acquire the real-time average pixel value of the display panel.

[0135] The adjustment unit 12 is electrically connected to the average pixel value acquisition unit 11 and is used to receive the real-time average pixel value of the display panel and obtain the gamma register value corresponding to the real-time average pixel value under different gray levels according to the real-time average pixel value and the preset second mapping relationship and first mapping relationship.

[0136] The grayscale acquisition unit 13 is used to acquire the first grayscale value corresponding to the real-time average pixel value.

[0137] The control unit 14 is used to control the display panel to display the brightness corresponding to the real-time average pixel value based on the first gray level value and the gamma register value corresponding to the real-time average pixel value under the first gray level value.

[0138] The average pixel value acquisition unit 11 can receive the initial data voltage of the image to be displayed on the display panel, calculate the average pixel value based on the received initial data voltage, and then output the average pixel value to the adjustment unit 12. The adjustment unit 12 outputs the gamma register value corresponding to the real-time average pixel value at different gray levels according to the magnitude of the real-time average pixel value and the preset second mapping relationship and first mapping relationship.

[0139] The grayscale acquisition unit 13 acquires the first grayscale value under the real-time average pixel value according to the image information to be displayed on the display panel, and outputs the first grayscale value to the control unit 14. The control unit 14 updates the new data voltage according to the first grayscale value and the gamma register value acquired from the adjustment unit 12, and controls the brightness of the display panel under the real-time average pixel value, so as to achieve the purpose of adjusting the brightness of the display panel under different average pixel values.

[0140] Optionally, when adjusting the brightness of the display panel at the target low average pixel value, the grayscale of the displayed image can be the maximum grayscale. That is, the first grayscale value is the maximum grayscale value. At this time, the adjustment unit 12 can only output the first gamma register value at the target low average pixel value, and the control unit 14 updates the data voltage according to the first gamma register value. Since the brightness of the display panel corresponding to the first gamma register value can be relatively large, the brightness of the display panel at the target low average pixel value can be improved.

[0141] Furthermore, such as Figure 9As shown, the brightness adjustment device 01 may also include an adjustment switch 15. When the adjustment switch 15 is closed, the control unit 14 receives the initial data voltage of the image to be displayed on the display panel and does not perform dimming processing. When the adjustment switch 15 is open, the average pixel value acquisition unit 11, the adjustment unit 12, etc., start working, and the control unit 14 updates the new data voltage according to the new gamma register value to achieve the purpose of adjusting the brightness of the display panel under the average pixel value.

[0142] In one embodiment of this application, such as Figure 10 As shown, Figure 10 This is a schematic diagram of another brightness adjustment device provided in an embodiment of this application. Device 01 further includes a dimming unit 16, which controls the dimming brightness value of the display panel. The dimming unit 16 can output the dimming brightness value of the display panel to the control unit 14.

[0143] When adjusting the brightness of the display panel at each average pixel value, the dimming unit 16 can also control the dimming brightness value of the display panel. The control unit 14 obtains the gamma register value corresponding to the dimming brightness value at the average pixel value based on the received dimming brightness value and the preset third mapping relationship, and then controls the display panel to display the brightness corresponding to the preset dimming brightness value at the average pixel value. This further meets the user's dimming needs.

[0144] Optionally, when adjusting the brightness of the display panel at the target low average pixel value, the dimming unit 16 can automatically switch the dimming brightness value of the display panel to the maximum value to achieve the maximum brightness of the display panel at the target low average pixel value, thereby meeting the user's brightness requirements for the display panel at the low average pixel value.

[0145] Figure 11 This is a schematic diagram of a display device provided in an embodiment of this application.

[0146] like Figure 11 As shown, this application embodiment also provides a display device 100, including a display panel 02 and a brightness adjustment device 01 as provided in the above embodiment. Exemplarily, the display device 100 is an electronic device such as a computer, television, or mobile phone, and this application does not specifically limit it.

[0147] In the display device 100, by adjusting the range of gamma register values, a larger gamma register value corresponds to a higher display panel brightness. This allows for a larger gamma register value corresponding to a lower average pixel value, thereby increasing the display panel's brightness at low average pixel values ​​and meeting the user's brightness requirements at these levels. Furthermore, different gamma register values ​​can be set for different low average pixel values, enabling the display panel to display different maximum brightness levels at varying low average pixel values, thus satisfying diverse user needs.

[0148] In addition, the display device 100 can control the brightness of the display panel when displaying different gray levels under the same average pixel value, making it possible to increase the brightness of the display panel under each gray level value, which is conducive to further meeting the user's demand for the brightness of the display panel.

[0149] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for adjusting the brightness of a display panel, characterized in that, The method includes: Adjust the range of gamma register values ​​and configure at least one first mapping relationship between gamma register values ​​and grayscale values, such that the gamma register value corresponding to the maximum grayscale value in each of the first mapping relationships is the first gamma register value; when not adjusted, the gamma register value corresponding to the maximum grayscale value is the second gamma register value, and at least one of the first gamma register values ​​is greater than the second gamma register value. Configure a second mapping relationship between the average pixel value of the display panel and the first gamma register value, so that the brightness of the display panel under the target low average pixel value is the first brightness, and the brightness of the display panel under the target low average pixel value is the second brightness when not adjusted, and the first brightness is greater than the second brightness; Obtain the real-time average pixel value of the display panel, and obtain the first mapping relationship that matches the real-time average pixel value based on the real-time average pixel value and the second mapping relationship; Obtain the first grayscale value corresponding to the real-time average pixel value, and control the display panel to display the brightness corresponding to the real-time average pixel value according to the first mapping relationship between the first grayscale value and the real-time average pixel value.

2. The method according to claim 1, characterized in that, The plurality of first gamma register values ​​include a first sub-gamma register value, a second sub-gamma register value, and a third sub-gamma register value with different values. The first sub-gamma register value is greater than the second sub-gamma register value, and the third sub-gamma register value is located between the first sub-gamma register value and the second sub-gamma register value. The second mapping relationship between the average pixel value of the configuration display panel and the first gamma register value includes: Set a first average pixel threshold and a second average pixel threshold, wherein the first average pixel threshold is less than the second average pixel threshold; The average pixel value is configured to correspond to the first sub-gamma register value if it is not greater than the first average pixel threshold, the average pixel value is configured to correspond to the second sub-gamma register value if it is not less than the second average pixel threshold, and the average pixel value is configured to correspond to the third sub-gamma register value if it is greater than the first average pixel threshold and less than the second average pixel threshold.

3. The method according to claim 2, characterized in that, The second sub-gamma register value is not less than the second gamma register value, and the target low average pixel value is less than the second average pixel threshold.

4. The method according to claim 2, characterized in that, The second average pixel threshold is no greater than 50%.

5. The method according to claim 2, characterized in that, The first average pixel threshold is not less than 5%.

6. The method according to claim 2, characterized in that, The third sub-gamma register value is GammaLV13, the first sub-gamma register value is GammaLV11, the second sub-gamma register value is GammaLV12, the first average pixel threshold is APL1, the second average pixel threshold is APL2, and the average pixel value between the first average pixel threshold APL1 and the second average pixel threshold APL2 is APLn. Among them, GammaLV13=(GammaLV11-GammaLV12)*(APLn-APL2) / (APL1-APL2)+GammaLV12.

7. The method according to claim 2, characterized in that, The method further includes: Under different average pixel values, a third mapping relationship is configured between the dimming brightness value of the display panel and the gamma register value; in each of the third mapping relationships, the gamma register value corresponding to the maximum dimming brightness value is the gamma register value under the first grayscale value; Obtain the real-time average pixel value of the display panel, and determine the third mapping relationship that matches the real-time average pixel value based on the real-time average pixel value; The dimming brightness value of the display panel is obtained, and the display panel is controlled to display the brightness corresponding to the real-time average pixel value according to the third mapping relationship between the dimming brightness value and the real-time average pixel value.

8. The method according to claim 7, characterized in that, The gamma register value corresponding to the dimming brightness value includes a third gamma register value, a fourth gamma register value, and a fifth gamma register value. The third gamma register value is greater than the fourth gamma register value, and the fifth gamma register value is located between the third gamma register value and the fourth gamma register value. The third mapping relationship between the dimming brightness value of the display panel and the gamma register value includes: Set a first dimming brightness threshold and a second dimming brightness threshold, wherein the first dimming brightness threshold is greater than the second dimming brightness threshold; The dimming brightness value configured to be no greater than the second dimming brightness threshold corresponds to the fourth gamma register value; the dimming brightness value configured to be no less than the first dimming brightness threshold corresponds to the third gamma register value; and the dimming brightness value configured to be greater than the second dimming brightness threshold and less than the first dimming brightness threshold corresponds to the fifth gamma register value.

9. The method according to claim 8, characterized in that, The display panel includes a normal dimming mode and a high-brightness dimming mode. The dimming brightness value in the high-brightness dimming mode is greater than the dimming brightness value in the normal dimming mode. The second dimming brightness threshold is the maximum dimming brightness value in the normal dimming mode, and the first dimming brightness threshold is the maximum dimming brightness value in the high-brightness dimming mode.

10. The method according to claim 8, characterized in that, The third gamma register value is the same as the gamma register value corresponding to the maximum dimming brightness value, and the fourth gamma register value is the same as the second gamma register value.

11. The method according to claim 8, characterized in that, The third gamma register value is GammaLV3, the fourth gamma register value is GammaLV4, the fifth gamma register value is GammaLV5, the first dimming brightness threshold is DBV1, the second dimming brightness threshold is DBV2, and the dimming brightness value between the first dimming brightness threshold DBV1 and the second dimming brightness threshold DBV2 is DBVx. Among them, GammaLV5=(DBVx-DBV2) / (DBV1-DBV2)*(GammaLV3-GammaLV4)+GammaLV4.

12. The method according to claim 8, characterized in that, The third gamma register value and the fourth gamma register value correspond to the same gamma curve.

13. The method according to claim 1, characterized in that, Multiple values ​​of the first gamma register correspond to the same gamma curve.

14. A brightness adjustment device, characterized in that, Used to perform the method as described in any one of claims 1-13.

15. The apparatus according to claim 14, characterized in that, The device includes: An average pixel value acquisition unit is used to acquire the real-time average pixel value of the display panel; An adjustment unit, electrically connected to the average pixel value acquisition unit, is used to receive the real-time average pixel value of the display panel, and obtain the gamma register value corresponding to the real-time average pixel value under different gray levels according to the real-time average pixel value and the preset second mapping relationship and the first mapping relationship. A grayscale acquisition unit is used to acquire the first grayscale value corresponding to the real-time average pixel value; The control unit is used to control the display panel to display the brightness corresponding to the real-time average pixel value based on the first grayscale value and the gamma register value corresponding to the real-time average pixel value under the first grayscale value.

16. The apparatus according to claim 15, characterized in that, The device further includes a dimming unit, which is used to control the dimming brightness value of the display panel; The control unit is also used to control the display panel to display the brightness corresponding to the real-time average pixel value according to the dimming brightness value.

17. A display device, characterized in that, It includes a display panel and a brightness adjustment device as described in any one of claims 14-16.

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