Dimming method and device of display module, display module, medium and program product

Abstract

The invention discloses a dimming method and device of a display module, the display module, a medium and a program product, and the method comprises the steps: obtaining a brightness adjustment target value, and generating a light-emitting control signal based on the brightness adjustment target value; during local dimming, acquiring an address of a dimming area, and determining a gamma value of the dimming area and a gamma value of a non-dimming area based on the light emitting control signal; and based on the address of the dimming area, the gamma value of the dimming area and the gamma value of the non-dimming area, driving the pixels of the dimming area and the pixels of the non-dimming area to emit light under the control of the light emitting control signal.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and specifically relates to a dimming method and device for a display module, a display module, a medium, and a program product. Background Art

[0002] Currently, dimming of OLED (Organic Light-Emitting Diode) display modules increases or decreases the brightness of the entire screen. However, in real-world applications, users may only want to adjust the brightness of a certain area. If the brightness of the entire screen is adjusted, the display may appear too bright or too dark, and this will also affect power consumption. Summary of the Invention

[0003] The present application provides a dimming method and device for a display module, a display device, a medium, and a program product, aiming to solve the problem of local dimming of the display module to at least a certain extent.

[0004] In a first aspect of the present application, a dimming method for a display module is provided, the dimming method comprising: Acquiring a brightness adjustment target value, and generating a light emitting control signal based on the brightness adjustment target value; During local dimming, obtaining an address of a dimming area, and determining a gamma value of the dimming area and a gamma value of a non-dimming area based on the light emitting control signal; Based on the address of the dimming area, the gamma value of the dimming area, and the gamma value of the non-dimming area, the pixels of the dimming area and the pixels of the non-dimming area are driven to emit light under the control of the light emission control signal.

[0005] In some embodiments, the driving the pixels in the dimming area and the pixels in the non-dimming area to emit light under the control of the light-emission control signal based on the address of the dimming area, the gamma value of the dimming area, and the gamma value of the non-dimming area includes: generating a driving voltage for each pixel in the dimming area based on the address of the dimming area and the gamma value of the dimming area; determining an address of a non-dimming area according to the address of the dimming area, and generating a driving voltage for each pixel in the non-dimming area based on the address of the non-dimming area and a gamma value of the non-dimming area; Under the control of the light emitting control signal, the driving voltage of each pixel is used to drive the corresponding pixel to emit light.

[0006] In some embodiments, determining the address of the non-dimming area according to the address of the dimming area includes: Get the full screen resolution; The address of the non-dimming area is determined according to the resolution of the full screen and the address of the dimming area.

[0007] In some embodiments, determining the gamma value of the dimming area and the gamma value of the non-dimming area based on the light control signal includes: Obtaining the correlation between the light control signal, the gamma value, and the brightness; The gamma value of the dimming area and the gamma value of the non-dimming area are determined according to the correlation, the brightness adjustment target value and the light emitting control signal.

[0008] In some embodiments, determining the gamma value of the dimming area and the gamma value of the non-dimming area according to the correlation, the brightness adjustment target value, and the light control signal includes: Substituting the brightness adjustment target value and the light control signal into the correlation relationship to obtain the gamma value of the dimming area; The gamma value of the non-dimming area is determined according to the gamma value of the dimming area.

[0009] In some embodiments, determining the gamma value of the non-dimming area according to the gamma value of the dimming area includes: Obtaining a functional relationship between the gamma value of the dimming area and the gamma value of the non-dimming area; The gamma value of the dimming area is substituted into the functional relationship to obtain the gamma value of the non-dimming area.

[0010] In some embodiments, determining the gamma value of the dimming area and the gamma value of the non-dimming area according to the correlation, the brightness adjustment target value, and the light control signal includes: Substituting the brightness adjustment target value and the light control signal into the correlation relationship to obtain the gamma value of the dimming area; A current brightness value is obtained, and the current brightness value and the light control signal are substituted into the correlation relationship to obtain a gamma value of a non-dimming area.

[0011] In some implementations, obtaining the address of the dimming zone includes: receiving a local refresh signal sent by a terminal, wherein the local refresh signal includes an address of a dimming area and the brightness adjustment target value; The address of the dimming area is obtained from the local refresh signal.

[0012] In some embodiments, the dimming method further includes: During full-screen dimming, determining a gamma value of the full screen based on the light emitting control signal; Based on the gamma value of the full screen, pixels of the full screen are driven to emit light under the control of the light emitting control signal.

[0013] In some embodiments, the correspondence between the gamma value of the full screen, the light control signal, and the brightness is the same as the correspondence between the gamma value of the dimming area, the light control signal, and the brightness.

[0014] In some embodiments, the method further comprises: receiving an enable signal sent by a terminal; If the enable signal is valid, local dimming is performed; If the enable signal is invalid, full-screen dimming is performed.

[0015] In a second aspect of the present application, a dimming device for a display module is provided, the dimming device comprising: an acquisition module, configured to acquire a brightness adjustment target value and generate a light control signal based on the brightness adjustment target value; a local determination module, configured to obtain an address of a dimming area during local dimming, and determine a gamma value of the dimming area and a gamma value of a non-dimming area based on the light emission control signal; A driving module is configured to drive the pixels in the dimming area and the pixels in the non-dimming area to emit light under the control of the light-emitting control signal based on the address of the dimming area, the gamma value of the dimming area, and the gamma value of the non-dimming area.

[0016] In a third aspect of the present application, a display module is provided, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method provided in any embodiment of the first aspect when executing the computer program.

[0017] In a fourth aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method provided in any embodiment of the first aspect are implemented.

[0018] In a fifth aspect of the present application, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the steps of the method provided in any embodiment of the first aspect.

[0019] According to the dimming method and device, display device, medium and program product of the display module provided by one or more embodiments of the present application, the brightness adjustment target value is first obtained and a light-emitting control signal is generated based on the brightness adjustment target value. Then, during local dimming, the address of the dimming area is obtained, and the gamma value of the dimming area and the gamma value of the non-dimming area are determined based on the light-emitting control signal. Finally, based on the address of the dimming area, the gamma value of the dimming area and the gamma value of the non-dimming area, the pixels in the dimming area and the pixels in the non-dimming area are driven to emit light under the control of the light-emitting control signal. By determining the gamma value for the dimming area and the non-dimming area based on the same light-emitting control signal respectively, and under the control of the same light-emitting control signal, on the one hand, the pixels in the dimming area are driven to emit light based on the gamma value of the dimming area, and on the other hand, the pixels in the non-dimming area are driven to emit light based on the gamma value of the non-dimming area, different dimming can be performed on the dimming area and the non-dimming area under the control of the same light-emitting control signal, thereby realizing local dimming of the display module while ensuring that the remaining areas are not color cast, meeting the user's usage needs, improving display comfort, and reducing the power consumption of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 The diagram shows an application scenario of the dimming method of the display module in one or more embodiments of the present application.

[0022] Figure 2 A schematic flow chart of a dimming method for a display module in one or more embodiments of the present application is shown.

[0023] Figure 3 Shown Figure 1 Schematic diagram of the brightness change of the display module during the dimming process.

[0024] Figure 4 Shown Figure 2 Schematic diagram of the process of step S103.

[0025] Figure 5 Shown Figure 4 Schematic diagram of the process of step S202.

[0026] Figure 6 Shown Figure 2 Schematic diagram of the process of step S102.

[0027] Figure 7 Shown Figure 6 Schematic diagram of the process of step S402.

[0028] Figure 8 Shown Figure 7 Schematic diagram of the process of step S502.

[0029] Figure 9 Shown Figure 6 Schematic diagram of the process of step S402.

[0030] Figure 10 Shown Figure 2 Schematic diagram of the process of step S102.

[0031] Figure 11 A schematic flow chart of a dimming method for a display module in another embodiment of the present application is shown.

[0032] Figure 12 A schematic flow chart of a dimming method for a display module in another embodiment of the present application is shown.

[0033] Figure 13 A schematic structural diagram of a dimming device for a display module in another embodiment of the present application is shown.

[0034] Figure 14 The internal structure diagram of the display module in one or more embodiments of the present application is shown. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to understand the present application more clearly, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of this application.

[0036] Figure 1 For an application scenario diagram of the dimming method of the display module in one or more embodiments of the present application, please refer to Figure 1, the display screen of the display module can be divided into three display areas, namely display area A, display area B and display area C. For example, display area B displays the video picture and is the user's focus area. Display area A and display area C display status information and are the user's non-focus areas. In actual use, the user may only want to adjust the brightness of the video screen, that is, the brightness of display area B, and does not want to change the brightness of display area A and display area C. However, the OLED display module shares the light control signal EM across the entire screen, and there is currently no local dimming method, so local dimming cannot be performed on a certain area. Brightening or dimming the display picture of the entire display screen will cause visual discomfort and additional power waste in some application scenarios (such as playing a video on half the screen and only wanting to adjust the brightness of the video screen).

[0037] Figure 2 For a flow chart of a dimming method for a display module in one or more embodiments of the present application, please refer to Figure 2 In a first embodiment of the present application, a dimming method for a display module is provided, which can be applied to a display module. The dimming method includes the following steps S101 to S103.

[0038] Step S101 : acquiring a brightness adjustment target value, and generating a light control signal based on the brightness adjustment target value.

[0039] In this embodiment, the brightness adjustment target value can be the brightness level or brightness interval of the full screen of the display module. Exemplarily, the display module can determine the brightness adjustment target value in response to the user's brightness adjustment instruction. For example, the brightness level of the full screen of the display module can include level one, level two, and level three, with level one being the brightest and level three being the darkest. Assuming that the current brightness level of the display module is level two, if the user adjusts the brightness and the selected brightness value falls within the brightness interval corresponding to level one, the brightness adjustment target value is level one; if the user adjusts the brightness to a darker level and the selected brightness value falls within the brightness interval corresponding to level three, the brightness adjustment target value is level three.

[0040] The light control signal EM can adjust the brightness of the entire screen by controlling the duration of pixel light emission. For example, the width of the light control signal EM (or the duty cycle of the light control signal EM) is positively correlated with the brightness. The larger the duty cycle of the light control signal EM, the longer the duration of the high level in the light control signal EM, the longer the light emission time, and the higher the brightness. Conversely, the smaller the duty cycle of the light control signal EM, the shorter the duration of the high level in the light control signal EM, the shorter the light emission time, and the lower the brightness.

[0041] Step S102 : during local dimming, obtaining the address of the dimming area, and determining the gamma value of the dimming area and the gamma value of the non-dimming area based on the light emitting control signal.

[0042] In this embodiment, the dimming methods of the display module can be divided into local dimming and full-screen dimming. Local dimming adjusts the brightness of only a certain area. In this case, the entire display module screen can be divided into a dimming area and a non-dimming area. Only the brightness of the dimming area is adjusted to the target value, while the brightness of the non-dimming area remains unchanged or changes less than that of the non-dimming area. That is, the difference in brightness before and after adjustment in the non-dimming area is smaller than that in the dimming area. Full-screen dimming uniformly adjusts the brightness of the entire screen. In this case, the brightness of both the dimming area and the non-dimming area is adjusted to the target value.

[0043] The address of the dimming area may include the address of each pixel in the dimming area on the display screen of the display module. The gamma value of the dimming area may include the gamma value of each pixel in the dimming area. The gamma value of the non-dimming area may include the gamma value of each pixel in the non-dimming area. For example, the gamma values of each pixel in the same area may be the same or different. If the gamma values of each pixel in the same area are different, the gamma value of this area is the value range of the gamma value of each pixel in this area.

[0044] The gamma value defines the mapping between the pixel's grayscale and the drive voltage of the driver transistor. Since the drive voltage of the driver transistor affects the pixel's brightness, the gamma value also affects the brightness. For example, if the gamma value is less than 1, the display module's screen can be brightened; if the gamma value is greater than 1, the display module's screen can be dimmed.

[0045] Therefore, the gamma value and the light control signal EM both affect the brightness, and the brightness is determined by the gamma value and the light control signal. There is a correlation between the light control signal, the gamma value, and the brightness, and the gamma value can be determined based on the light control signal and the brightness.

[0046] Step S103 : Based on the address of the dimming area, the gamma value of the dimming area, and the gamma value of the non-dimming area, the pixels in the dimming area and the non-dimming area are driven to emit light under the control of the light emission control signal.

[0047] In this embodiment, the pixels in the dimming area can be driven to emit light under the control of a light-emitting control signal based on the address of the dimming area and the gamma value of the dimming area, and the pixels in the non-dimming area can be driven to emit light under the control of a light-emitting control signal based on the address of the dimming area and the gamma value of the non-dimming area.

[0048] When the display screen of the display module is brightened, the brightness value of the non-dimming area after adjustment is smaller than the brightness value of the dimming area after adjustment; when the display screen of the display module is dimmed, the brightness value of the non-dimming area after adjustment is larger than the brightness value of the dimming area after adjustment.

[0049] For example, when the display module's screen is brightened, the gamma value of the non-dimming area is greater than the gamma value of the dimming area; when the display module's screen is dimmed, the gamma value of the non-dimming area is less than the gamma value of the dimming area. If the gamma value of a region is the range of gamma values for each pixel in that region, then when the display module's screen is brightened, the minimum gamma value of the non-dimming area is greater than the maximum gamma value of the dimming area; when the display module's screen is dimmed, the maximum gamma value of the non-dimming area is less than the minimum gamma value of the dimming area.

[0050] Figure 3 for Figure 1 For a schematic diagram of the brightness change of the display module during the dimming process, please refer to Figure 3 Before dimming, the width of the light emitting control signal EM is w1, the gamma value of the full screen is g1, and the brightness of the full screen is L1.

[0051] During full-screen dimming, the width of the light-emitting control signal EM is w2, the gamma value of the full screen is g2, and the brightness of the full screen is L2. Figure 3 Taking the display screen of the display module as an example, when the display screen is brightened, w2>w1, g2<g1, and L2>L1. If the display screen of the display module is dimmed, w2<w1, g2>g1, and L2<L1.

[0052] During local dimming, the width of the light-emitting control signal EM is still w2, the gamma value of the display area B (i.e., the dimming area) is still g2, and the brightness of the display area B is L2, but the gamma value of the display area A and the display area C (i.e., the non-dimming area) is g3, and the brightness of the display area A and the display area C is L1. At this time, g3>g1. Figure 3 Taking the constant brightness of the display area A and the display area C as an example, the brightness of the display area A and the display area C may also be changed. If the brightness of the display area A and the display area C is L3, then L3<L2.

[0053] The dimming method of the above-mentioned display module first obtains the brightness adjustment target value and generates a light-emitting control signal based on the brightness adjustment target value, then obtains the address of the dimming area during local dimming, and determines the gamma value of the dimming area and the gamma value of the non-dimming area based on the light-emitting control signal, and finally drives the pixels in the dimming area and the non-dimming area to emit light under the control of the light-emitting control signal based on the address of the dimming area, the gamma value of the dimming area and the gamma value of the non-dimming area. By determining the gamma value for the dimming area and the non-dimming area based on the same light-emitting control signal respectively, and under the control of the same light-emitting control signal, on the one hand, driving the pixels in the dimming area to emit light based on the gamma value of the dimming area, and on the other hand, driving the pixels in the non-dimming area to emit light based on the gamma value of the non-dimming area, different dimming can be performed on the dimming area and the non-dimming area under the control of the same light-emitting control signal, thereby realizing local dimming of the display module and ensuring that the remaining areas are not color cast, meeting the user's usage needs, improving display comfort, and reducing the power consumption of the display module.

[0054] In some embodiments, step S101 may include the following steps: determining a duty cycle of the light emitting control signal according to the brightness adjustment target value; and generating the light emitting control signal according to the determined duty cycle.

[0055] Exemplarily, determining the duty cycle of the light-emitting control signal based on the brightness adjustment target value may include the following steps: obtaining a correspondence table between the duty cycle of the light-emitting control signal and the brightness level; determining the brightness level to which the brightness adjustment target value belongs; and searching the correspondence table for the duty cycle corresponding to the determined brightness level as the duty cycle of the light-emitting control signal.

[0056] Exemplarily, the duty cycle of the light-emitting control signal is positively correlated with the brightness, that is, the greater the duty cycle of the light-emitting control signal, the greater the brightness.

[0057] Figure 4 for Figure 2 For a flow chart of step S103, please refer to Figure 4 In some embodiments, step S103 may include the following steps S201 to S203.

[0058] Step S201 : generating a driving voltage for each pixel in the dimming area based on the address of the dimming area and the gamma value of the dimming area.

[0059] In this embodiment, the driving voltage of the pixel may be the driving voltage of the driving transistor in the pixel circuit. As previously described, the gamma value can define the mapping relationship between the grayscale of the pixel and the driving voltage of the driving transistor. Substituting the grayscale value of the pixel into the mapping relationship defined by the gamma value can obtain the driving voltage value of the driving transistor, thereby generating a corresponding driving voltage to drive the pixel to emit light.

[0060] Step S202 : determining the address of the non-dimming area according to the address of the dimming area, and generating a driving voltage for each pixel in the non-dimming area based on the address of the non-dimming area and the gamma value of the non-dimming area.

[0061] In practical applications, the driving voltages of pixels in the same area are typically different, given that the grayscale levels of pixels in the same area may differ. For example, when the display screen of a display module is dimmed, the maximum driving voltage of each pixel in the non-dimming area is lower than the minimum driving voltage of each pixel in the dimming area. When the display screen of the display module is dimmed, the minimum driving voltage of each pixel in the non-dimming area is higher than the maximum driving voltage of each pixel in the dimming area.

[0062] Step S203 : Under the control of the light emitting control signal, the driving voltage of each pixel is used to drive the corresponding pixel to emit light.

[0063] In this embodiment, under the control of the light-emitting control signal, on the one hand, the driving voltage of each pixel in the dimming area is used to drive the corresponding pixels in the dimming area to emit light, and on the other hand, the driving voltage of each pixel in the non-dimming area is used to drive the corresponding pixels in the non-dimming area to emit light.

[0064] In the above embodiment, the driving voltage of each pixel in the dimming area is generated based on the gamma value of the dimming area, and the driving voltage of each pixel in the non-dimming area is generated based on the gamma value of the non-dimming area. Then, the driving voltage of each pixel is used to drive the corresponding pixel to emit light under the control of the light-emitting control signal. While the brightness is uniformly adjusted by the light-emitting control signal, the different gamma values of the dimming area and the non-dimming area are utilized to achieve the brightness adjustment target value only. The brightness of the non-dimming area remains unchanged or changes slightly.

[0065] Exemplarily, step S201 may include the following steps: acquiring the grayscale of each pixel in the dimming area based on the address of the dimming area; generating the driving voltage of each pixel in the dimming area according to the grayscale of each pixel in the dimming area and the gamma value of the dimming area.

[0066] Taking the example of pixels in the same area having the same gamma value, step S201 may include: generating a first mapping relationship based on the gamma value of the dimming area; obtaining a grayscale value of each pixel in the dimming area based on the address of each pixel in the dimming area; substituting the grayscale value of each pixel in the dimming area into the first mapping relationship in sequence to obtain a driving voltage value for each pixel in the dimming area; and generating a driving voltage signal according to the driving voltage value of each pixel in the dimming area. If the gamma values of each pixel in the same area are different, generating a first mapping relationship for each pixel in the dimming area based on the gamma value of each pixel in the dimming area, and then substituting the grayscale value of each pixel in the dimming area into the respective first mapping relationships to obtain a driving voltage value for each pixel in the dimming area.

[0067] Accordingly, step S202 may include the following steps: obtaining the grayscale of each pixel in the non-dimming area based on the address of the non-dimming area; generating the driving voltage of each pixel in the non-dimming area according to the grayscale of each pixel in the non-dimming area and the gamma value of the non-dimming area.

[0068] For example, based on the address of the non-dimming area and the gamma value of the non-dimming area, the driving voltage of each pixel in the non-dimming area is generated, which may be similar to step S201 and will not be described in detail here.

[0069] Figure 5 for Figure 4 For a flow chart of step S202, please refer to Figure 5 , exemplarily, the step S202 may include the following steps S301 to S302.

[0070] Step S301: Obtain full-screen resolution.

[0071] In this embodiment, the full-screen resolution is the product of the number of pixels in two perpendicular directions of the display screen. For example, the display screen includes a plurality of pixels arranged in an array, and the full-screen resolution is the product of the number of pixels in a row and the number of pixels in a column.

[0072] Step S302 : determining the address of the non-dimming area according to the resolution of the full screen and the address of the dimming area.

[0073] In this embodiment, the address of the dimming area may include the row address and column address of each pixel in the dimming area, the row address is the row number of the pixel array, and the column address is the column number of the pixel array.

[0074] Figure 6 for Figure 2 For a flow chart of step S102, please refer to Figure 6In some embodiments, the step S102 may include the following steps S401 to S402.

[0075] Step S401: Obtain the correlation between the light control signal, the gamma value, and the brightness.

[0076] Step S402 : determining the gamma value of the dimming area and the gamma value of the non-dimming area according to the correlation, the brightness adjustment target value, and the light control signal.

[0077] Exemplarily, the correlation between the light-emitting control signal, gamma value, and brightness can be a functional relationship between the light-emitting control signal, gamma value, and brightness, such as the following relationship: L = f(w, g); where L is the brightness value, w is the width or duty cycle of the light-emitting control signal, and g is the gamma value. The correlation between the light-emitting control signal, gamma value, and brightness can also be a correspondence between the light-emitting control signal and the gamma value, such as a combination of the following relationships: L = f1(w), L = f2(g); where L is the brightness value, w is the width or duty cycle of the light-emitting control signal, and g is the gamma value. The correlation between the light-emitting control signal, gamma value, and brightness can also be a correspondence between a brightness-gamma value correspondence table and the light-emitting control signal, or a correspondence between a brightness-light-emitting control signal correspondence table and the light-emitting control signal. For example, the brightness can be divided into multiple levels, with each level's brightness range corresponding to a light-emitting control signal width or duty cycle, and different levels of brightness ranges corresponding to different light-emitting control signal widths or duty cycles. Each width or duty cycle of the light emitting control signal corresponds to a corresponding table of brightness and gamma value, and the corresponding relationship between brightness and gamma value in each corresponding table is different.

[0078] For example, the width or duty cycle of the light control signal is positively correlated with the brightness. When the gamma value is less than 1, the brightness value increases; when the gamma value is greater than 1, the brightness value decreases.

[0079] Figure 7 for Figure 6 For a flow chart of step S402, please refer to Figure 7 In a possible embodiment, step S402 may include the following steps S501 to S502.

[0080] Step S501: Substitute the brightness adjustment target value and the light control signal into the correlation relationship to obtain the gamma value of the dimming area.

[0081] Step S502 : determining the gamma value of the non-dimming area according to the gamma value of the dimming area.

[0082] In the above embodiment, the brightness adjustment target value and the light control signal are first substituted into the correlation relationship to obtain the gamma value of the dimming area, and then the gamma value of the non-dimming area is determined based on the gamma value of the dimming area. It is only necessary to determine the correlation between the gamma value of the dimming area and the gamma value of the non-dimming area, and the obtained gamma value of the dimming area can be used to further obtain the gamma value of the non-dimming area, which is relatively easy to implement.

[0083] Exemplarily, step S501 may include: selecting a correspondence table between brightness and gamma values based on the light control signal; and searching the correspondence table for a gamma value corresponding to the brightness adjustment target value as the gamma value of the dimming area.

[0084] In this embodiment, the correspondence table between brightness and gamma values may include multiple brightness intervals and gamma values corresponding to each brightness interval.

[0085] Figure 8 for Figure 7 For a flow chart of step S502, please refer to Figure 8 , exemplarily, the step S502 may include the following steps S601 to S602.

[0086] Step S601 : obtaining a functional relationship between the gamma value of the dimming area and the gamma value of the non-dimming area.

[0087] Step S602 : Substitute the gamma value of the dimming area into the function relationship to obtain the gamma value of the non-dimming area.

[0088] In this embodiment, the functional relationship can be a linear function, such as the functional relationship can be the following relationship: g'=k*g+b; where g is the gamma value of the dimming area, g' is the gamma value of the non-dimming area, and k and b are setting coefficients. The functional relationship can also be a quadratic function, such as the functional relationship can be the following relationship: g'=a*g 2 +b*g+c; where g is the gamma value of the dimming area, g' is the gamma value of the non-dimming area, and a, b, and c are set coefficients. The functional relationship can also be other functions, and this application is not limited thereto. For example, the functional relationship can be determined based on the debugging results before the display screen leaves the factory.

[0089] For example, when the display module's screen is brightened, the gamma value of the non-dimming area is greater than the gamma value of the dimming area; when the display module's screen is dimmed, the gamma value of the non-dimming area is less than the gamma value of the dimming area. Accordingly, when the display module's screen is brightened, k, a, and b can all be greater than 1; when the display module's screen is dimmed, k, a, and b can all be less than 1.

[0090] In practical applications, a coefficient matrix can be generated based on the position of the dimming zone. The coefficient corresponding to the dimming zone is 1, and the coefficient of the non-dimming zone is a function relationship. By multiplying the gamma value of the dimming zone by this coefficient matrix, the gamma value of each pixel can be obtained.

[0091] Figure 9 for Figure 6 For a flow chart of step S402, please refer to Figure 9 In another possible embodiment, step S402 may include the following steps S701 to S702.

[0092] Step S701: Substitute the brightness adjustment target value and the light control signal into the correlation relationship to obtain the gamma value of the dimming area.

[0093] Exemplarily, step S701 may be the same as step S501 and will not be described in detail here.

[0094] Step S702: Acquire the current brightness value, and substitute the current brightness value and the light control signal into the correlation relationship to obtain the gamma value of the non-dimming area.

[0095] Exemplarily, step S702 may be similar to step S501 and will not be described in detail here.

[0096] In the above embodiment, according to the different brightness requirements of the dimming area and the non-dimming area, the respective gamma values are substituted into the correlation relationship to obtain the respective gamma values.

[0097] Figure 10 for Figure 2 For a flow chart of step S102, please refer to Figure 10 In some embodiments, step S102 may include the following steps S801 to S802.

[0098] Step S801: receiving a local refresh signal sent by a terminal.

[0099] In this embodiment, the local refresh signal includes the address of the dimming area and the brightness adjustment target value.

[0100] Exemplarily, the terminal may be an AP (English: Application processor, Chinese: application processing terminal), such as a CPU (English: Central Processing Unit, Chinese: central processing unit) of a smart terminal.

[0101] Step S802: Obtain the address of the dimming area from the local refresh signal.

[0102] Exemplarily, step S101 may include: acquiring a brightness adjustment target value from a local refresh signal.

[0103] Figure 11 This is a flow chart of a dimming method for a display module in another embodiment of the present application. Figure 11 In some embodiments, the dimming method may include the following steps S901 to S903.

[0104] Step S901: Acquire a brightness adjustment target value, and generate a light control signal based on the brightness adjustment target value.

[0105] Exemplarily, step S901 may be the same as step S101 and will not be described in detail here.

[0106] Step S902 : during full-screen dimming, determining a full-screen gamma value based on a light emitting control signal.

[0107] Exemplarily, step S902 may be similar to step S102 and will not be described in detail here.

[0108] Step S903 : Based on the gamma value of the entire screen, the pixels of the entire screen are driven to emit light under the control of the light emitting control signal.

[0109] Exemplarily, step S903 may be similar to step S103 and will not be described in detail here.

[0110] For example, the correspondence between the full-screen gamma value, the lighting control signal, and the brightness can be the same as the correspondence between the gamma value, the lighting control signal, and the brightness of the dimming area. In this way, the full-screen gamma value determined based on the lighting control signal can be the same as the gamma value of the dimming area determined based on the lighting control signal, which facilitates implementation.

[0111] Exemplarily, the dimming method may further include the following steps: receiving an enable signal sent by the terminal, performing local dimming if the enable signal is valid, and performing full-screen dimming if the enable signal is invalid.

[0112] Figure 12 This is a flow chart of a dimming method for a display module in another embodiment of the present application. Figure 12 On the one hand, the full-screen gamma value and emission control signal EM are determined based on the brightness adjustment target value. The full-screen gamma value and emission control signal EM then select full-screen dimming or local dimming based on the enable signal. Full-screen dimming directly adjusts the brightness based on the full-screen gamma value, while local dimming determines the gamma values of the dimming area and non-dimming area based on the full-screen gamma value. On the other hand, the address of the non-dimming area is determined based on the address of the dimming area and the full-screen resolution obtained from the enable signal, and then the gamma value of the non-dimming area is determined. Finally, the brightness of the dimming area is adjusted based on the address and gamma value of the dimming area, and the brightness of the non-dimming area is adjusted based on the address and gamma value of the non-dimming area.

[0113] Figure 13 This is a structural diagram of a dimming device for a display module in another embodiment of the present application. Figure 13 In a second embodiment of the present application, a dimming device for a display module is provided. The dimming device includes an acquisition module 1001 , a local determination module 1002 and a driving module 1003 .

[0114] The acquisition module 1001 is configured to acquire a brightness adjustment target value and generate a light emission control signal based on the brightness adjustment target value.

[0115] The local determination module 1002 is configured to obtain the address of the dimming area during local dimming, and determine the gamma value of the dimming area and the gamma value of the non-dimming area based on the light control signal.

[0116] The driving module 1003 is configured to drive the pixels in the dimming area and the non-dimming area to emit light under the control of the light emission control signal based on the address of the dimming area, the gamma value of the dimming area and the gamma value of the non-dimming area.

[0117] In some embodiments, the driving module 1003 may include a dimming generation unit, a non-dimming generation unit, and a driving unit.

[0118] The dimming generation unit is configured to generate a driving voltage for each pixel of the dimming area based on the address of the dimming area and the gamma value of the dimming area.

[0119] The non-dimming generating unit is configured to determine an address of the non-dimming area according to the address of the dimming area, and generate a driving voltage for each pixel in the non-dimming area based on the address of the non-dimming area and a gamma value of the non-dimming area.

[0120] The driving unit is configured to drive the corresponding pixel to emit light using the driving voltage of each pixel under the control of the light emitting control signal.

[0121] Exemplarily, the non-dimming generating unit may include a resolution acquiring subunit and an address determining subunit.

[0122] The resolution acquisition subunit is configured to acquire the resolution of the full screen.

[0123] The address determining subunit is configured to determine the address of the non-dimming area according to the resolution of the full screen and the address of the dimming area.

[0124] In some embodiments, the local determination module 1002 may include a relationship acquisition unit and a gamma value determination unit.

[0125] The relationship acquisition unit is configured to acquire a correlation relationship among the light emission control signal, the gamma value, and the brightness.

[0126] The gamma value determining unit is configured to determine a gamma value of the dimming area and a gamma value of the non-dimming area according to the correlation, the brightness adjustment target value, and the light emitting control signal.

[0127] In a possible embodiment, the gamma value determination unit may include a corresponding table dimming determination subunit and a non-dimming determination subunit.

[0128] The dimming determination subunit is configured to substitute the brightness adjustment target value and the light emitting control signal into a correlation relationship to obtain a gamma value of the dimming area.

[0129] The non-dimming determination subunit is configured to determine the gamma value of the non-dimming area according to the gamma value of the dimming area.

[0130] Exemplarily, the non-dimming determination subunit may be configured to obtain a functional relationship between the gamma value of the dimming area and the gamma value of the non-dimming area; and substitute the gamma value of the dimming area into the functional relationship to obtain the gamma value of the non-dimming area.

[0131] In another possible embodiment, the gamma value determination unit may include a dimming determination subunit and a non-dimming determination subunit.

[0132] The dimming determination subunit is configured to substitute the brightness adjustment target value and the light emitting control signal into a correlation relationship to obtain a gamma value of the dimming area.

[0133] The non-dimming determination subunit is configured to obtain a current brightness value, and substitute the current brightness value and the light control signal into a correlation relationship to obtain a gamma value of the non-dimming area.

[0134] In some embodiments, the local determination module 1002 may include a receiving unit and an address obtaining unit.

[0135] The receiving unit is configured to receive a local refresh signal sent by the terminal, where the local refresh signal includes an address of a dimming area and a brightness adjustment target value.

[0136] The address acquiring unit is configured to acquire the address of the dimming area from the partial refresh signal.

[0137] In some embodiments, the dimming device may further include a full-screen determination module configured to determine a gamma value of the full screen based on the light emitting control signal during full-screen dimming.

[0138] Accordingly, the driving module 1003 may be configured to drive the pixels of the entire screen to emit light under the control of the light emitting control signal based on the gamma value of the entire screen.

[0139] For example, the correspondence between the gamma value of the full screen, the light control signal, and the brightness may be the same as the correspondence between the gamma value of the dimming area, the light control signal, and the brightness.

[0140] Exemplarily, the dimming device may further include a receiving module configured to receive an enable signal sent by the terminal.

[0141] Correspondingly, if the enable signal is valid, local dimming is performed; if the enable signal is invalid, full-screen dimming is performed.

[0142] In a third aspect of the present application, a display module is provided, which includes a display panel, a memory and a processor. The memory stores computer program code, which, when executed by the processor, prompts the processor to execute a dimming method according to one or more embodiments of the present disclosure.

[0143] Figure 14 For an internal structure diagram of a display module in one or more embodiments of this application, please refer to Figure 14 , the display module includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface, the display unit and the input device are connected to the system bus via the input / output interface. The processor is used to provide computing and control capabilities. The memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface is used to exchange information between the processor and an external device. The communication interface is used to communicate with an external terminal in a wired or wireless manner. The wireless manner can be achieved through Wi-Fi (Chinese: mobile hotspot), mobile cellular network, NFC (English: Near Field Communication, Chinese: near field communication) or other technologies. When the computer program is executed by the processor, a device interaction method is implemented. The display unit is used to form a visually visible image, and can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the device casing, or an external keyboard, touchpad or mouse, etc.

[0144] Those skilled in the art will understand that Figure 14The structure shown in the figure is merely a block diagram of a portion of the structure related to the solution of the present disclosure, and does not constitute a limitation on the computer device to which the solution of the present disclosure is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0145] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. In particular, any reference to memory, database, or other media used in the embodiments provided in the present disclosure can include at least one of non-volatile and volatile memory. Non-volatile memory can include ROM (Read-Only Memory), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, ReRAM (Resistive Random Access Memory), MRAM (Magnetoresistive Random Access Memory), FRAM (Ferroelectric Random Access Memory), PCM (Phase Change Memory), graphene memory, etc. Volatile memory can include RAM (Random Access Memory) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as SRAM (Static Random Access Memory) or DRAM (Dynamic Random Access Memory). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), quantum computing-based data processing logic devices, and the like.

[0146] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0147] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0148] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0149] In this application, unless otherwise specified or limited, the terms "connect," "fix," etc. should be understood broadly. For example, "fix" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0150] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0151] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A dimming method for a display module, characterized in that: The dimming method includes: Acquiring a brightness adjustment target value, and generating a light emitting control signal based on the brightness adjustment target value; During local dimming, obtaining an address of a dimming area, and determining a gamma value of the dimming area and a gamma value of a non-dimming area based on the light emitting control signal; Based on the address of the dimming area, the gamma value of the dimming area, and the gamma value of the non-dimming area, the pixels of the dimming area and the pixels of the non-dimming area are driven to emit light under the control of the light emission control signal.

2. The dimming method according to claim 1, wherein: The driving of the pixels in the dimming area and the pixels in the non-dimming area to emit light under the control of the light emitting control signal based on the address of the dimming area, the gamma value of the dimming area, and the gamma value of the non-dimming area includes: generating a driving voltage for each pixel in the dimming area based on the address of the dimming area and the gamma value of the dimming area; determining an address of a non-dimming area according to the address of the dimming area, and generating a driving voltage for each pixel in the non-dimming area based on the address of the non-dimming area and a gamma value of the non-dimming area; Under the control of the light emitting control signal, the driving voltage of each pixel is used to drive the corresponding pixel to emit light.

3. The dimming method according to claim 2, wherein: The determining the address of the non-dimming area according to the address of the dimming area includes: Get the full screen resolution; The address of the non-dimming area is determined according to the resolution of the full screen and the address of the dimming area.

4. The dimming method according to any one of claims 1 to 3, characterized in that: The determining the gamma value of the dimming area and the gamma value of the non-dimming area based on the light emitting control signal includes: Obtaining the correlation between the light control signal, the gamma value, and the brightness; The gamma value of the dimming area and the gamma value of the non-dimming area are determined according to the correlation, the brightness adjustment target value and the light emitting control signal.

5. The dimming method according to claim 4, wherein: The determining the gamma value of the dimming area and the gamma value of the non-dimming area according to the correlation, the brightness adjustment target value and the light control signal includes: Substituting the brightness adjustment target value and the light control signal into the correlation relationship to obtain the gamma value of the dimming area; The gamma value of the non-dimming area is determined according to the gamma value of the dimming area.

6. The dimming method according to claim 5, wherein: The determining the gamma value of the non-dimming area according to the gamma value of the dimming area includes: Obtaining a functional relationship between the gamma value of the dimming area and the gamma value of the non-dimming area; The gamma value of the dimming area is substituted into the functional relationship to obtain the gamma value of the non-dimming area.

7. The dimming method according to claim 4, wherein: The determining the gamma value of the dimming area and the gamma value of the non-dimming area according to the correlation, the brightness adjustment target value and the light control signal includes: Substituting the brightness adjustment target value and the light control signal into the correlation relationship to obtain the gamma value of the dimming area; A current brightness value is obtained, and the current brightness value and the light control signal are substituted into the correlation relationship to obtain a gamma value of a non-dimming area.

8. The dimming method according to any one of claims 1 to 3, characterized in that: The obtaining the address of the dimming zone includes: receiving a local refresh signal sent by a terminal, wherein the local refresh signal includes an address of a dimming area and the brightness adjustment target value; The address of the dimming area is obtained from the local refresh signal.

9. The dimming method according to any one of claims 1 to 3, characterized in that: The dimming method further includes: During full-screen dimming, determining a gamma value of the full screen based on the light emitting control signal; Based on the gamma value of the full screen, pixels of the full screen are driven to emit light under the control of the light emitting control signal.

10. The method according to claim 9, characterized in that The correspondence between the gamma value of the full screen, the light control signal, and the brightness is the same as the correspondence between the gamma value of the dimming area, the light control signal, and the brightness.

11. The method according to claim 9, characterized in that The method further comprises: receiving an enable signal sent by a terminal; If the enable signal is valid, local dimming is performed; If the enable signal is invalid, full-screen dimming is performed.

12. A dimming device for a display module, characterized in that: The dimming device comprises: an acquisition module, configured to acquire a brightness adjustment target value and generate a light control signal based on the brightness adjustment target value; a local determination module, configured to obtain an address of a dimming area during local dimming, and determine a gamma value of the dimming area and a gamma value of a non-dimming area based on the light emission control signal; A driving module is configured to drive the pixels in the dimming area and the pixels in the non-dimming area to emit light under the control of the light-emitting control signal based on the address of the dimming area, the gamma value of the dimming area, and the gamma value of the non-dimming area.

13. A display module, characterized in that: The display module includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of any one of claims 1-11 when executing the computer program.

14. A computer-readable storage medium, characterized in that A computer program is stored thereon, and when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 11 are implemented.

15. A computer program product, characterized in that The invention comprises a computer program, which implements the steps of the method according to any one of claims 1 to 11 when the computer program is executed by a processor.

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