Gamma Parameter Determination Method, Device, Electronic Device, and Storage Medium for a Display Screen

Abstract

An embodiment of the present application provides a method, device, electronic device, and storage medium for determining gamma parameters of a display screen, which relates to the field of display technology. The method includes: obtaining the initial gamma parameters and gray-scale normalized transmittance of each preset Gamma binding point gray scale in the target display screen; performing difference fitting on the initial gamma parameters and gray-scale normalized transmittance of each of the preset Gamma binding point gray scales to obtain the target correspondence between the gamma parameters and the transmittance of the target display screen; obtaining the standard transmittance of each of the preset Gamma binding point gray scales; for each preset Gamma binding point gray scale, based on the target correspondence, determining the gamma parameter corresponding to the standard transmittance of this preset Gamma binding point gray scale as the target gamma parameter of this preset Gamma binding point gray scale. The embodiment of the present application realizes the rapid debugging of gamma parameters.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and in particular, to a method, an apparatus, an electronic device, and a storage medium for determining gamma parameters of a display screen. Background Art

[0002] Gamma is an important indicator of a display screen. In the current display technology field, Gamma 2.2 that conforms to the linear perception of human eyes for brightness is used as the product specification of the display screen, that is, a display screen that satisfies Gamma 2.2 ± 0.2 can be considered a qualified product. However, the display screen needs to go through multiple manufacturing processes, and the fluctuations brought by each process may inevitably cause the Gamma not to be within the range of 2.2 ± 0.2. Therefore, it is necessary to perform gamma debugging on the display screen to ensure that the gamma of the display screen remains within the range of 2.2 ± 0.2.

[0003] In the related art, gamma debugging is performed by performing multiple debuggings on each Gamma binding point gray level, comparing the brightness to determine the binding point value that satisfies Gamma 2.2 ± 0.2, so as to keep the gamma of the display screen within the range of 2.2 ± 0.2. Specifically, it is divided into two methods. One method is to manually measure and change the positive and negative polarity voltages of each gamma binding point one by one, and continuously compare the target brightness until the best binding point voltage that satisfies the target brightness is obtained, so as to determine the voltage of each gamma binding point. The second method is to install an automated device and use the automated device to replace manual operations to search for the best binding point voltage of each gamma binding point. Usually, the method of gradually increasing or decreasing the voltage point by point is used to automatically search for the best binding point voltage, that is, for each gamma binding point, first compare the current brightness with the target brightness to determine the debugging direction, and then use the Figure 1 as shown in the V-T curve graph to perform debugging on the binding point voltage of each gamma binding point one by one.

[0004] In summary, the above two common gamma debugging methods in the prior art both confirm Gamma 2.2 by performing point-by-point debugging and comparing the target brightness. During the debugging process, in order to obtain the best binding point voltage, for each gamma binding point, it is necessary to perform debugging and brightness measurement operations repeatedly for many times, and the debugging efficiency is low. Therefore, it is difficult to adapt to the increasingly efficient production process. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a method, an apparatus, an electronic device, and a storage medium for determining gamma parameters of a display screen, so as to improve the debugging efficiency of gamma debugging. The specific technical solutions are as follows:

[0006] In a first aspect, the embodiments of the present application provide a method for determining gamma parameters of a display screen, the method including:

[0007] Obtain the initial gamma parameters and gray level normalized transmittance of each preset Gamma binding point gray level in the target display screen;

[0008] Perform difference fitting on the initial gamma parameters and grayscale normalized transmittance of each of the preset Gamma binding point grayscales to obtain the target correspondence between the gamma parameters and transmittance of the target display screen;

[0009] Obtain the standard transmittance of each of the preset Gamma binding point grayscales;

[0010] For each preset Gamma binding point grayscale, based on the target correspondence, determine the gamma parameter corresponding to the standard transmittance of this preset Gamma binding point grayscale as the target gamma parameter of this preset Gamma binding point grayscale.

[0011] In a possible implementation manner, the obtaining of the initial gamma parameters and grayscale normalized transmittance of each preset Gamma binding point grayscale in the target display screen includes:

[0012] Obtain the grayscale brightness of each preset Gamma binding point grayscale in the target display screen collected by a color analyzer;

[0013] Perform normalization processing on the grayscale brightness of each of the preset Gamma binding point grayscales to obtain the grayscale normalized transmittance of each of the preset Gamma binding point grayscales;

[0014] Obtain the initial gamma parameters of each of the preset Gamma binding point grayscales read from the chip of the target display screen.

[0015] In a possible implementation manner, the performing of difference fitting on the initial gamma parameters and grayscale normalized transmittance of each of the preset Gamma binding point grayscales to obtain the target correspondence between the gamma parameters and transmittance of the target display screen includes:

[0016] Use the initial gamma parameters of each of the preset Gamma binding point grayscales as the X array and the grayscale normalized transmittance of the preset Gamma binding point grayscales as the Y array to perform difference fitting, and obtain the negative polarity - transmittance curve and positive polarity - transmittance curve of the gamma parameters and transmittance of the target display screen as the target correspondence.

[0017] In a possible implementation manner, the obtaining of the standard transmittance of each of the preset Gamma binding point grayscales includes:

[0018] For each preset Gamma binding point grayscale, calculate the standard transmittance of this preset Gamma binding point grayscale according to the following formula:

[0019]

[0020] Where, T r_TargetRepresents the standard transmittance of the current preset Gamma binding point gray level, where γ is the preset standard gamma and n represents the current preset Gamma binding point gray level.

[0021] In a possible implementation, for each preset Gamma binding point gray level, based on the target correspondence, determining the gamma parameter corresponding to the standard transmittance of this preset Gamma binding point gray level as the target gamma parameter of this preset Gamma binding point gray level includes:

[0022] For each preset Gamma binding point gray level, among the transmittances in the target correspondence, determining the transmittance closest to the standard transmittance of this preset Gamma binding point gray level to obtain the target transmittance of this preset Gamma binding point gray level; based on the target correspondence, the gamma parameter corresponding to the target transmittance of this preset Gamma binding point gray level is used as the target gamma parameter of this preset Gamma binding point gray level.

[0023] In a second aspect, an embodiment of the present application provides a gamma parameter determination device for a display screen, and the device includes:

[0024] A data acquisition module, configured to acquire the initial gamma parameters and gray level normalized transmittances of each preset Gamma binding point gray level in the target display screen;

[0025] A correspondence acquisition module, configured to perform difference fitting on the initial gamma parameters and gray level normalized transmittances of each preset Gamma binding point gray level to obtain the target correspondence between the gamma parameters and transmittances of the target display screen;

[0026] A transmittance acquisition module, configured to acquire the standard transmittances of each preset Gamma binding point gray level;

[0027] A gamma parameter determination module, configured to, for each preset Gamma binding point gray level, based on the target correspondence, determine the gamma parameter corresponding to the standard transmittance of this preset Gamma binding point gray level as the target gamma parameter of this preset Gamma binding point gray level.

[0028] In a possible implementation, the data acquisition module is specifically configured to:

[0029] Acquire the gray level brightness of each preset Gamma binding point gray level in the target display screen collected by a color analyzer;

[0030] Perform normalization processing on the gray level brightness of each preset Gamma binding point gray level to obtain the gray level normalized transmittances of each preset Gamma binding point gray level;

[0031] Obtain the initial gamma parameters of each of the preset Gamma binding point gray levels read from the chip of the target display screen.

[0032] In a possible implementation manner, the corresponding relationship obtaining module is specifically configured to:

[0033] Take the initial gamma parameters of each of the preset Gamma binding point gray levels as the X array, and take the gray level normalized transmittance of the preset Gamma binding point gray levels as the Y array for difference fitting, so as to obtain the negative polarity - transmittance curve and the positive polarity - transmittance curve of the gamma parameter and the transmittance of the target display screen as the target corresponding relationship.

[0034] In a possible implementation manner, the transmittance obtaining module is specifically configured to:

[0035] For each preset Gamma binding point gray level, calculate the standard transmittance of this preset Gamma binding point gray level according to the following formula:

[0036]

[0037] wherein, T_(r_Target) represents the standard transmittance of the current preset Gamma binding point gray level, γ is the preset standard gamma, and n represents the current preset Gamma binding point gray level.

[0038] In a possible implementation manner, the gamma parameter determining module includes:

[0039] For each preset Gamma binding point gray level, among the transmittances in the target corresponding relationship, determine the transmittance closest to the standard transmittance of this preset Gamma binding point gray level to obtain the target transmittance of this preset Gamma binding point gray level; based on the target corresponding relationship, the gamma parameter corresponding to the target transmittance of this preset Gamma binding point gray level is used as the target gamma parameter of this preset Gamma binding point gray level.

[0040] In a third aspect, an embodiment of the present application provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory complete communication with each other through the communication bus;

[0041] The memory is used to store a computer program;

[0042] The processor is configured to implement the gamma parameter determination method of any one of the display screens in the present application when executing the program stored on the memory.

[0043] Fourthly, an embodiment of the present application provides a computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the method for determining the gamma parameter of any display screen in the present application is implemented.

[0044] Fifthly, an embodiment of the present application provides a computer program product containing instructions, which when running on a computer, enables the computer to execute the method for determining the gamma parameter of any display screen in the present application.

[0045] Beneficial effects of the embodiments of the present application:

[0046] The method for determining the gamma parameter of the display screen provided by the embodiment of the present application first obtains the initial gamma parameter and the gray-scale normalized transmittance of each preset Gamma binding point gray scale in the target display screen, and then performs difference fitting on the initial gamma parameter and the gray-scale normalized transmittance of each preset Gamma binding point gray scale to obtain the target corresponding relationship between the gamma parameter and the transmittance of the target display screen. Then, the standard transmittance of each preset Gamma binding point gray scale is obtained, and for each preset Gamma binding point gray scale, based on the target corresponding relationship, the gamma parameter corresponding to the standard transmittance of the preset Gamma binding point gray scale is determined as the target gamma parameter of the preset Gamma binding point gray scale. Through the above method, the efficiency of gamma debugging of the display screen can be improved. Specifically, only one measurement of each Gamma binding point gray scale is required to obtain the initial gamma parameter and the gray-scale normalized transmittance, and then combined with the standard transmittance, the target gamma parameter of each Gamma binding point gray scale can be determined to complete the gamma debugging of the display screen. Compared with the method of repeatedly measuring each Gamma binding point gray scale in the prior art, the embodiment of the present application simplifies the debugging process, saves debugging time, and saves debugging manpower while ensuring the accuracy of gamma debugging, effectively improving the debugging efficiency and production capacity of gamma debugging.

[0047] Of course, implementing any product or method of the present application does not necessarily require achieving all the above-mentioned advantages simultaneously. Description of the drawings

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application, and those of ordinary skill in the art can also obtain other embodiments according to these drawings.

[0049] Figure 1 It is the V-T curve diagram required in the gamma debugging process of the prior art provided by the embodiment of the present application;

[0050] Figure 2a Schematic flowchart of a method for determining gamma parameters of a display screen provided by an embodiment of the present application;

[0051] Figure 2b Example data graph of the initial gamma parameters and gray-scale normalized transmittance of each preset Gamma binding point gray scale in two display screens with an initial gamma parameter of 1.9 and an initial gamma parameter of 2.5 provided by an embodiment of the present application;

[0052] Figure 2c Example graph of the negative-polarity transmittance curve and positive-polarity transmittance curve of the gamma parameter and transmittance of a display screen with an initial gamma parameter of 1.9 provided by an embodiment of the present application;

[0053] Figure 2d Example graph of the negative-polarity transmittance curve and positive-polarity transmittance curve of the gamma parameter and transmittance of a display screen with an initial gamma parameter of 2.5 provided by an embodiment of the present application;

[0054] Figure 2e Comparison table of the initial gamma parameters and target gamma parameters of each preset Gamma binding point gray scale of two display screens with an initial gamma parameter of 1.9 and an initial gamma parameter of 2.5 provided by an embodiment of the present application;

[0055] Figure 3a A possible implementation manner of step S11 provided by an embodiment of the present application;

[0056] Figure 3b Gamma curve graphs obtained by testing two display screens with an initial gamma parameter of 1.9 and an initial gamma parameter of 2.5 based on their respective target gamma parameters provided by an embodiment of the present application;

[0057] Figure 4 Schematic structural diagram of a gamma parameter determination device for a display screen provided by an embodiment of the present application;

[0058] Figure 5 Schematic structural diagram of an electronic device provided by an embodiment of the present application. Detailed implementation manners

[0059] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art based on the present application belong to the scope of protection of the present application.

[0060] Since the gamma debugging method in the prior art involves repeated operations of multiple debugging and brightness measurement for the same gamma binding point, it is difficult to ensure both the accuracy and efficiency of debugging simultaneously. To solve this technical problem, the embodiments of the present application provide a method and device for determining the gamma parameters of a display screen.

[0061] The following uses specific embodiments to elaborate in detail on the method for determining the gamma parameters of the display screen provided by the embodiments of the present application.

[0062] First, the terms in the present application are explained:

[0063] Gray scale: Refers to the brightness levels of the display screen. The change in the display screen brightness is not continuous but varies according to the pre-defined brightness levels, and these brightness levels are the gray scales of the display screen.

[0064] Gamma: Refers to the distribution method of pre-assigning the gray scale brightness corresponding to the gray scale. The sensitivity of the human eye to the change in the display screen brightness is related to the brightness of the screen, and is most sensitive to the change in the screen brightness at low screen brightness. Currently, the display screen has a total of 256 gray scales (gray scales 0 - 255), and each gray scale corresponds to a brightness, that is, the brightness of the display screen can only change to the brightness corresponding to each gray scale. The brightness corresponding to each gray scale is also pre-defined. For example, if the maximum brightness of the display screen is 256 nits, it can be stipulated that each gray scale corresponds to 1 nit, and a linear distribution is performed from gray scale 0 - 255, that is, 1 - 256 nits correspond to 0 - 255 gray scales respectively; it can also be stipulated that gray scale 0 corresponds to 0.5 nit, gray scale 1 corresponds to 1 nit, and 256 nits are non-linearly distributed to 0 - 255 gray scales. This distribution method of pre-defining the brightness corresponding to each gray scale is gamma.

[0065] Gamma2.2: Refers to the gamma parameter being 2.2, meaning that each gray scale of the display screen and its corresponding gray scale brightness satisfy the formula:

[0066] (Gray scale value / 256)^2.2 = Brightness

[0067] Generally, when the display screen satisfies Gamma2.2 ± 0.2, it can be considered a qualified product. At this time, the display screen best meets the linear requirements of the human eye for brightness change and gray scale change.

[0068] Gamma binding point: When setting multiple (n paths, such as 14 paths) voltages by external resistor voltage division with the analog power supply voltage provided by the integrated power supply circuit as a reference, so that the source driver circuit generates 256 voltage values corresponding to each gray scale when receiving multiple voltages, the set n paths are the Gamma binding points, and these n path voltages are the binding point voltages.

[0069] See Figure 2a ,Figure 2a The figure is a schematic flowchart of a method for determining gamma parameters of a display screen provided by an embodiment of the present application, including the following steps S11 - S14:

[0070] Step S11: Obtain the initial gamma parameters and gray - scale normalized transmittance of each preset Gamma binding - point gray - scale in the target display screen.

[0071] The above - mentioned target display screen is a liquid - crystal display screen that needs gamma debugging. Each preset Gamma binding - point gray - scale is a plurality of Gamma binding - point gray - scales selected in advance in the target display screen, corresponding to different gray - scales in the target display screen respectively. It means that by selecting these Gamma binding - point gray - scales to determine the corresponding gamma parameters, the gamma debugging of the entire target display screen can be realized. For example, L255, L127, L0, etc., are selected according to requirements in actual applications.

[0072] The initial gamma parameters of each preset Gamma binding - point gray - scale represent the current gamma parameters of each preset Gamma binding - point gray - scale. Before the gamma debugging of the target display screen is completed, the initial gamma parameters of each preset Gamma binding - point gray - scale may be within the range of 2.2 ± 0.2, or may not be within the range of 2.2 ± 0.2.

[0073] The gray - scale normalized transmittance of each preset Gamma binding - point gray - scale is a parameter obtained by normalizing the gray - scale transmittance of each preset Gamma binding - point gray - scale. As Figure 2b shown, Figure 2b The figure shows an example data graph of the initial gamma parameters and gray - scale normalized transmittance of each preset Gamma binding - point gray - scale in two display screens with an initial gamma parameter of 1.9 and an initial gamma parameter of 2.5. Among them, L255, L247, L191, L127, L63, L31, L0 are 7 selected preset Gamma binding - point gray - scales.

[0074] Step S12: Perform difference fitting on the initial gamma parameters and gray - scale normalized transmittance of each of the preset Gamma binding - point gray - scales to obtain the target correspondence between the gamma parameters and transmittance of the target display screen.

[0075] After obtaining the initial gamma parameters and gray - scale normalized transmittance of each preset Gamma binding - point gray - scale respectively, performing difference fitting on the initial gamma parameters and gray - scale normalized transmittance, the correspondence between the gamma parameters and transmittance obtained can not only represent the correspondence between the gamma parameters and transmittance of each selected preset Gamma binding - point gray - scale, but also represent the correspondence between the gamma parameters and transmittance of other unselected Gamma binding - point gray - scales, that is, it can represent the correspondence between the gamma parameters and transmittance of the target display screen, as the target correspondence.

[0076] In a possible implementation, the above difference fitting may be to use the initial gamma parameters of the gray levels of each preset Gamma binding point as the X array, and the gray level normalized transmittance of the gray levels of each preset Gamma binding point as the Y array for difference fitting, so as to obtain the negative polarity-transmittance curve and the positive polarity-transmittance curve of the gamma parameter and the transmittance of the target display screen, as the target correspondence.

[0077] In one example, the above difference fitting may be implemented by using the Cubic Hermite interpolation algorithm. In practical applications, other interpolation algorithms that can implement the difference fitting of the gamma parameter and the transmittance of the target display screen may also be used. Among them, the increment step of the interpolation algorithm is set as the adjustment step of the gamma parameter. That is to say, the obtained correspondence is not a continuous correspondence, but a point-to-point correspondence. That is, the difference between the first gamma parameter and the second gamma parameter in the obtained correspondence is also the adjustment step.

[0078] As Figure 2c shown, Figure 2c Fig. shows an example diagram of the negative polarity-transmittance curve and the positive polarity-transmittance curve of the gamma parameter and the transmittance of a display screen with an initial gamma parameter of 1.9. Figure 2d Fig. shows an example diagram of the negative polarity-transmittance curve and the positive polarity-transmittance curve of the gamma parameter and the transmittance of a display screen with an initial gamma parameter of 2.5. Among them, L255, L247, L191, L127, L63, L31, and L0 are selected as 7 preset Gamma binding point gray levels.

[0079] Step S13: Obtain the standard transmittance of each of the preset Gamma binding point gray levels.

[0080] The above standard transmittance refers to the transmittance of each preset Gamma binding point gray level when each preset Gamma binding point gray level conforms to Gamma2.2 ± 0.2. Since Gamma2.2 ± 0.2 means that the gamma parameter is within the range of 2.2 ± 0.2, therefore, the standard transmittance may be the transmittance corresponding to any value within the range of 2.2 ± 0.2 of the gamma parameter. Specifically, it can be selected according to the requirements of actual applications, and the standard transmittances of each preset Gamma binding point gray level may be the same or different. For example, the standard transmittances of each preset Gamma binding point gray level may be respectively selected as the transmittances corresponding to gamma parameters of 2.2, 2.1, and 2.4.

[0081] In an embodiment of the present application, the obtaining the standard transmittance of each of the preset Gamma binding point gray levels includes:

[0082] For each preset Gamma binding point gray level, calculate the standard transmittance of the preset Gamma binding point gray level according to the following formula:

[0083]

[0084] where T r_Target represents the standard transmittance of the current preset Gamma binding point gray level, γ is the preset standard gamma, which can take any value within the range of 2.2 ± 0.2, and n represents the current preset Gamma binding point gray level.

[0085] Step S14: For each preset Gamma binding point gray level, based on the target correspondence, determine the gamma parameter corresponding to the standard transmittance of the preset Gamma binding point gray level as the target gamma parameter of the preset Gamma binding point gray level.

[0086] As mentioned above, the correspondence between the gamma parameter and the transmittance obtained by difference fitting of the initial gamma parameters and the gray level normalized transmittance can represent the correspondence between the gamma parameter and the transmittance of the target display screen. Therefore, after determining the standard transmittance of each preset Gamma binding point gray level, for each preset Gamma binding point gray level, the target gamma parameter corresponding to the standard transmittance can be selected from the target correspondence according to the standard transmittance.

[0087] As Figure 2e shown, Figure 2e shows a comparison table of the initial gamma parameters and the target gamma parameters of each preset Gamma binding point gray level of two display screens with an initial gamma parameter of 1.9 and an initial gamma parameter of 2.5. Among them, L255, L247, L191, L127, L63, L31, and L0 are the 7 selected preset Gamma binding point gray levels, and their standard transmittances are determined to be 100%, 93%, 53%, 22%, 5%, 1%, and 0% respectively. Then, according to Figure 2c the negative polarity - transmittance curve and the positive polarity - transmittance curve of the gamma parameter and the transmittance of the display screen with an initial gamma parameter of 1.9 shown, and Figure 2d the negative polarity - transmittance curve and the positive polarity - transmittance curve of the gamma parameter and the transmittance of the display screen with an initial gamma parameter of 2.5 shown, determine the target gamma parameters corresponding to the standard transmittances of each preset Gamma binding point gray level in the two display screens.

[0088] In a possible implementation manner, for each preset Gamma binding point gray level, among the transmittances in the target correspondence, the transmittance closest to the standard transmittance of the preset Gamma binding point gray level is determined to obtain the target transmittance of the preset Gamma binding point gray level; based on the target correspondence, the gamma parameter corresponding to the target transmittance of the preset Gamma binding point gray level is used as the target gamma parameter of the preset Gamma binding point gray level.

[0089] As mentioned above, the obtained target correspondence is not a continuous correspondence but a point-to-point correspondence. Therefore, for each preset Gamma binding point gray level, there may not necessarily be a transmittance exactly equal to the obtained standard transmittance in the target correspondence. In this case, the transmittance closest to the standard transmittance is selected as the target transmittance, and then the gamma parameter corresponding to the target transmittance in the target correspondence is selected as the target gamma parameter, which can still ensure the accuracy of the target gamma parameter, enabling the present application to be effectively implemented in practical applications while ensuring the accuracy of the gamma adjustment result.

[0090] As can be seen from the above, the method for determining the gamma parameter of the display screen provided by the embodiment of the present application first obtains the initial gamma parameter and gray level normalized transmittance of each preset Gamma binding point gray level in the target display screen, then performs difference fitting on the initial gamma parameter and gray level normalized transmittance of each preset Gamma binding point gray level to obtain the target correspondence between the gamma parameter and the transmittance of the target display screen. Then, the standard transmittance of each preset Gamma binding point gray level is obtained, and for each preset Gamma binding point gray level, based on the target correspondence, the gamma parameter corresponding to the standard transmittance of the preset Gamma binding point gray level is determined as the target gamma parameter of the preset Gamma binding point gray level. By the above method, the efficiency of gamma adjustment of the display screen can be improved. Specifically, only one measurement of each Gamma binding point gray level is required to obtain the initial gamma parameter and gray level normalized transmittance, and then combined with the standard transmittance, the target gamma parameter of each Gamma binding point gray level can be determined to complete the gamma adjustment of the display screen. Compared with the method of repeatedly measuring each Gamma binding point gray level in the prior art, the embodiment of the present application simplifies the adjustment process, saves adjustment time, and saves adjustment manpower while ensuring the accuracy of gamma adjustment, effectively improving the adjustment efficiency and production capacity of gamma adjustment.

[0091] In a possible implementation manner, refer to Figure 3a , the above step S11 of obtaining the initial gamma parameter and gray level normalized transmittance of each preset Gamma binding point gray level in the target display screen includes:

[0092] Step S21: Obtain the gray level brightness of each preset Gamma binding point gray level in the target display screen collected by a color analyzer.

[0093] The gray-scale brightness of each of the above-mentioned preset Gamma binding point gray-scales can be obtained by connecting a color analyzer to the target display screen and collecting it with the color analyzer. In one example, the color analyzer can be a CA 410 (a commonly used color analyzer).

[0094] Step S22: Normalize the gray-scale brightness of each of the preset Gamma binding point gray-scales to obtain the gray-scale normalized transmittance of each of the preset Gamma binding point gray-scales.

[0095] After obtaining the gray-scale brightness of each of the preset Gamma binding point gray-scales, normalize each gray-scale brightness with respect to the gray-scale to obtain the gray-scale normalized transmittance. In one example, it can be to calculate the ratio of the gray-scale number of each of the preset Gamma binding point gray-scales to the total gray-scale number, as shown in the following formula:

[0096]

[0097] where m is the gray-scale normalized transmittance, n is the gray-scale number of each of the preset Gamma binding point gray-scales, and 255 is the total gray-scale number.

[0098] Step S23: Obtain the initial gamma parameters of each of the preset Gamma binding point gray-scales read from the chip of the target display screen.

[0099] The initial gamma parameters of each of the above-mentioned preset Gamma binding point gray-scales are the current gamma parameters of each of the preset Gamma binding point gray-scales before the gamma debugging of the target display screen, and can be read by the chip in the target display screen. In one example, the chip can be a P-Gamma chip (programmable gamma correction buffer circuit chip), and reading each initial gamma parameter can be achieved by connecting the target display screen to an I2C (Inter-Integrated Circuit BUS) device, and then reading the current gamma parameters of each of the preset Gamma binding point gray-scales set at the register address corresponding to P-gamma in the central control board of the target display screen.

[0100] In one example, after obtaining the target gamma parameters of each of the preset Gamma binding point gray-scales subsequently, each target gamma parameter is also burned into the corresponding register address of the P-gamma chip through the I2C device, so as to change the gamma parameters of each of the preset Gamma binding point gray-scales to each target gamma parameter, and then the gamma parameters of the target display screen can also be tested to ensure that it meets Gamma2.2±0.2, thereby completing the gamma debugging of the target display screen.

[0101] For example Figure 3b as shown Figure 3bThe figure shows gamma curves of a display screen with an initial gamma parameter of 1.9 and an initial gamma parameter of 2.5, which are obtained by testing based on their respective target gamma parameters. It can be seen that at this time, the gamma curves of the display screens with an initial gamma parameter of 1.9 and an initial gamma parameter of 2.5 are both near Gamma 2.2, meeting the range of Gamma 2.2 ± 0.2.

[0102] As can be seen from the above, the method for determining the gamma parameter of the display screen provided by the embodiment of the present application normalizes the gray-scale brightness of each preset Gamma binding point gray scale collected by a color analyzer, and then reads the initial gamma parameter of each preset Gamma binding point gray scale from the chip of the target display screen, which can ensure the accuracy of the obtained gray-scale normalized transmittance and the initial gamma parameter. At the same time, it makes the measurement of each preset Gamma binding point gray scale easy to implement, ensuring the convenience of gamma debugging, thereby saving debugging time and improving the efficiency of gamma debugging.

[0103] See Figure 4 , the embodiment of the present application also provides a structural schematic diagram of a device for determining the gamma parameter of a display screen. The above device includes:

[0104] A data acquisition module 401, configured to acquire the initial gamma parameter and the gray-scale normalized transmittance of each preset Gamma binding point gray scale in the target display screen;

[0105] A corresponding relationship obtaining module 402, configured to perform difference fitting on the initial gamma parameter and the gray-scale normalized transmittance of each preset Gamma binding point gray scale to obtain the target corresponding relationship between the gamma parameter and the transmittance of the target display screen;

[0106] A transmittance acquisition module 403, configured to acquire the standard transmittance of each preset Gamma binding point gray scale;

[0107] A gamma parameter determination module 404, configured to, for each preset Gamma binding point gray scale, based on the target corresponding relationship, determine the gamma parameter corresponding to the standard transmittance of this preset Gamma binding point gray scale as the target gamma parameter of this preset Gamma binding point gray scale.

[0108] As can be seen from the above, the gamma parameter determination device for a display screen provided by the embodiments of the present application first obtains the initial gamma parameters and gray-scale normalized transmittance of each preset Gamma binding point gray scale in the target display screen, and then performs difference fitting on the initial gamma parameters and gray-scale normalized transmittance of each preset Gamma binding point gray scale to obtain the target correspondence between the gamma parameter and the transmittance of the target display screen. Then, the standard transmittance of each preset Gamma binding point gray scale is obtained, and for each preset Gamma binding point gray scale, based on the target correspondence, the gamma parameter corresponding to the standard transmittance of this preset Gamma binding point gray scale is determined as the target gamma parameter of this preset Gamma binding point gray scale. By the above method, the efficiency of gamma debugging of the display screen can be improved. Specifically, only one measurement needs to be performed on each Gamma binding point gray scale to obtain the initial gamma parameter and gray-scale normalized transmittance, and then combined with the standard transmittance, the target gamma parameter of each Gamma binding point gray scale can be determined to complete the gamma debugging of the display screen. Compared with the method of repeatedly measuring each Gamma binding point gray scale in the prior art, the embodiments of the present application save debugging time while ensuring the accuracy of gamma debugging, and effectively improve the debugging efficiency and production capacity of gamma debugging.

[0109] In one embodiment of the present application, the data acquisition module 401 is specifically configured to:

[0110] Obtain the gray-scale brightness of each preset Gamma binding point gray scale in the target display screen collected by a color analyzer;

[0111] Perform normalization processing on the gray-scale brightness of each of the preset Gamma binding point gray scales to obtain the gray-scale normalized transmittance of each of the preset Gamma binding point gray scales;

[0112] Obtain the initial gamma parameters of each of the preset Gamma binding point gray scales read from the chip of the target display screen.

[0113] As can be seen from the above, in the gamma parameter determination method for a display screen provided by the embodiments of the present application, the gray-scale brightness of each preset Gamma binding point gray scale collected by a color analyzer is normalized, and then the initial gamma parameters of each preset Gamma binding point gray scale are read from the chip of the target display screen, which can ensure the accuracy of the obtained gray-scale normalized transmittance and initial gamma parameters, and at the same time make the measurement of each preset Gamma binding point gray scale easy to implement, ensure the convenience of gamma debugging, thereby saving debugging time and improving the efficiency of gamma debugging.

[0114] In one embodiment of the present application, the correspondence obtaining module 402 is specifically configured to:

[0115] Take the initial gamma parameter of each of the preset Gamma binding point gray levels as the X array, and use the gray level normalized transmittance of the preset Gamma binding point gray levels as the Y array for difference fitting to obtain the negative polarity - transmittance curve and the positive polarity - transmittance curve of the gamma parameter and the transmittance of the target display screen as the target correspondence.

[0116] In an embodiment of the present application, the transmittance acquisition module 403 is specifically configured to:

[0117] For each preset Gamma binding point gray level, calculate the standard transmittance of this preset Gamma binding point gray level according to the following formula:

[0118]

[0119] where \(T_{(r\_Target)}\) represents the standard transmittance of the current preset Gamma binding point gray level, \(\gamma\) is the preset standard gamma, and \(n\) represents the current preset Gamma binding point gray level.

[0120] In an embodiment of the present application, the gamma parameter determination module 404 includes:

[0121] For each preset Gamma binding point gray level, among the transmittances in the target correspondence, determine the transmittance closest to the standard transmittance of this preset Gamma binding point gray level to obtain the target transmittance of this preset Gamma binding point gray level; based on the target correspondence, the gamma parameter corresponding to the target transmittance of this preset Gamma binding point gray level is used as the target gamma parameter of this preset Gamma binding point gray level.

[0122] An embodiment of the present application also provides an electronic device, as Figure 5 shown, including a processor 501, a communication interface 502, a memory 503, and a communication bus 504. Among them, the processor 501, the communication interface 502, and the memory 503 complete mutual communication through the communication bus 504,

[0123] The memory 503 is used to store a computer program;

[0124] The processor 501 is configured to, when executing the program stored on the memory 503, implement the method steps for determining the gamma parameter of any of the above - mentioned display screens.

[0125] The communication bus mentioned in the above-mentioned electronic device can be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. This communication bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, only a thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0126] The communication interface is used for communication between the above-mentioned electronic device and other devices.

[0127] The memory can include a Random Access Memory (RAM), and can also include a Non-Volatile Memory (NVM), such as at least one disk memory. Optionally, the memory can also be at least one storage device located far from the aforementioned processor.

[0128] The above-mentioned processor can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0129] In another embodiment provided by this application, a computer-readable storage medium is also provided. A computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the steps of any of the above-mentioned gamma parameter determination methods for a display screen are implemented.

[0130] In another embodiment provided by this application, a computer program product containing instructions is also provided. When it runs on a computer, it causes the computer to execute any of the above-mentioned gamma parameter determination methods for a display screen in the above embodiments.

[0131] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

[0132] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0133] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other, and the differences between each embodiment and other embodiments are emphasized. In particular, for the device and electronic device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiments.

[0134] The above are only the preferred embodiments of the present application and are not intended to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application are all included in the protection scope of the present application.

Claims

1. A method for determining gamma parameters of a display screen, characterized in that, The method includes: Obtaining the initial gamma parameter and the gray-scale normalized transmittance of each preset Gamma binding point gray scale in the target display screen; Using the initial gamma parameters of each of the preset Gamma binding point gray scales as the X array, and the gray-scale normalized transmittance of the preset Gamma binding point gray scales as the Y array for difference fitting, to obtain the negative polarity-transmittance curve and the positive polarity-transmittance curve of the gamma parameter and the transmittance of the target display screen as the target correspondence; Obtaining the standard transmittance of each of the preset Gamma binding point gray scales; For each preset Gamma binding point gray scale, based on the target correspondence, determining the gamma parameter corresponding to the standard transmittance of this preset Gamma binding point gray scale as the target gamma parameter of this preset Gamma binding point gray scale.

2. The method according to claim 1, characterized in that, The obtaining the initial gamma parameter and the gray-scale normalized transmittance of each preset Gamma binding point gray scale in the target display screen includes: Obtaining the gray-scale brightness of each preset Gamma binding point gray scale in the target display screen collected by a color analyzer; Performing normalization processing on the gray-scale brightness of each of the preset Gamma binding point gray scales to obtain the gray-scale normalized transmittance of each of the preset Gamma binding point gray scales; Obtaining the initial gamma parameter of each of the preset Gamma binding point gray scales read from the chip of the target display screen.

3. The method according to claim 1, wherein The obtaining the standard transmittance of each of the preset Gamma binding point gray scales includes: For each preset Gamma binding point gray scale, calculating the standard transmittance of this preset Gamma binding point gray scale according to the following formula: Among them, T r_Target represents the standard transmittance of the current preset Gamma binding point gray scale, γ is the preset standard gamma, and n represents the current preset Gamma binding point gray scale.

4. The method according to claim 1, wherein The for each preset Gamma binding point gray scale, based on the target correspondence, determining the gamma parameter corresponding to the standard transmittance of this preset Gamma binding point gray scale as the target gamma parameter of this preset Gamma binding point gray scale includes: For each preset Gamma binding point gray scale, among the transmittances in the target correspondence, determining the transmittance closest to the standard transmittance of this preset Gamma binding point gray scale to obtain the target transmittance of this preset Gamma binding point gray scale; based on the target correspondence, the gamma parameter corresponding to the target transmittance of this preset Gamma binding point gray scale is used as the target gamma parameter of this preset Gamma binding point gray scale.

5. A gamma parameter determination device for a display screen, characterized in that The device includes: A data acquisition module, configured to obtain the initial gamma parameter and the gray-scale normalized transmittance of each preset Gamma binding point gray scale in the target display screen; A correspondence acquisition module, configured to use the initial gamma parameters of each of the preset Gamma binding point gray scales as the X array, and the gray-scale normalized transmittance of the preset Gamma binding point gray scales as the Y array for difference fitting, to obtain the negative polarity-transmittance curve and the positive polarity-transmittance curve of the gamma parameter and the transmittance of the target display screen as the target correspondence; A transmittance acquisition module, configured to obtain the standard transmittance of each of the preset Gamma binding point gray scales; A gamma parameter determination module, configured to determine, for each preset Gamma binding point gray level, a gamma parameter corresponding to the standard transmittance of the preset Gamma binding point gray level based on the target correspondence relationship as the target gamma parameter of the preset Gamma binding point gray level.

6. The device according to claim 5, characterized in that The data acquisition module is specifically configured to: acquire the gray level brightness of each preset Gamma binding point gray level in the target display screen collected by a color analyzer; perform normalization processing on the gray level brightness of each preset Gamma binding point gray level to obtain the gray level normalized transmittance of each preset Gamma binding point gray level; acquire the initial gamma parameter of each preset Gamma binding point gray level read from the chip of the target display screen.

7. The device according to claim 5, characterized in that, The transmittance acquisition module is specifically configured to: for each preset Gamma binding point gray level, calculate the standard transmittance of the preset Gamma binding point gray level according to the following formula: where T_(r_Target) represents the standard transmittance of the current preset Gamma binding point gray level, γ is a preset standard gamma, and n represents the current preset Gamma binding point gray level.

8. The device according to claim 5, characterized in that, The gamma parameter determination module includes: for each preset Gamma binding point gray level, determine, among the transmittances in the target correspondence relationship, the transmittance closest to the standard transmittance of the preset Gamma binding point gray level to obtain the target transmittance of the preset Gamma binding point gray level; based on the target correspondence relationship, the gamma parameter corresponding to the target transmittance of the preset Gamma binding point gray level is used as the target gamma parameter of the preset Gamma binding point gray level.

9. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus. Among them, the processor, the communication interface, and the memory complete communication with each other through the communication bus; the memory is used to store a computer program; the processor, when executing the program stored on the memory, implements the method steps described in any one of claims 1-4.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, it implements the method steps described in any one of claims 1-4.

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