CN112530347A - Method, device and equipment for determining compensation gray scale - Google Patents
Method, device and equipment for determining compensation gray scale Download PDFInfo
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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Abstract
The application provides a compensation gray scale determination method, a compensation gray scale determination device and compensation gray scale determination equipment. The method comprises the steps of obtaining a first brightness mean value of a target display area of a display panel to be compensated under a first gray scale value and a second brightness mean value under a second gray scale value; determining a target gamma value of the target display area under a target gray-scale value according to the first brightness mean value and the second brightness mean value, wherein the first gray-scale value is less than or equal to the target gray-scale value, the second gray-scale value is greater than or equal to the target gray-scale value, and a first difference value between the first gray-scale value and the target gray-scale value and a second difference value between the second gray-scale value and the target gray-scale value are both within a preset compensation range; and determining the compensation gray-scale value of each sub-pixel of the target display area under the target gray-scale value according to the target gamma value and the target brightness value of the target display area under the target gray-scale value. According to the embodiment of the application, the display panel can be prevented from having color cast.
Description
Technical Field
The application relates to the technical field of display, in particular to a compensation gray scale determining method, a compensation gray scale determining device and compensation gray scale determining equipment.
Background
The display panel may have a Mura phenomenon during the display process, which reduces the display effect of the display panel. In order to avoid the Mura phenomenon, the display panel may be subjected to Demura compensation.
In the related art, when performing Demura compensation on a display panel, the same gamma (gamma) value is usually used to determine the compensation gray scale of each display area of the display panel, for example, the gamma value is 2.2 to determine the compensation gray scale, so that the display panel after compensation still has a color cast problem.
Disclosure of Invention
The embodiment of the application provides a compensation gray scale determining method, device and equipment, which can avoid color cast of a display panel.
In a first aspect, an embodiment of the present application provides a compensation gray level determining method, which includes: acquiring a first brightness mean value of a target display area of a display panel to be compensated under a first gray scale value and a second brightness mean value under a second gray scale value; determining a target gamma value of the target display area under a target gray-scale value according to the first brightness mean value and the second brightness mean value, wherein the first gray-scale value is less than or equal to the target gray-scale value, the second gray-scale value is greater than or equal to the target gray-scale value, and a first difference value between the first gray-scale value and the target gray-scale value and a second difference value between the second gray-scale value and the target gray-scale value are both within a preset compensation range; and determining the compensation gray-scale value of each sub-pixel of the target display area under the target gray-scale value according to the target gamma value and the target brightness value of the target display area under the target gray-scale value.
In a possible implementation manner of the first aspect, determining a target gamma value of the target display area at the target gray scale value according to the first brightness average value and the second brightness average value includes:
calculating a target gamma value of the target display area at the target gray scale value according to equation (1):
wherein, GammaratioRepresenting a target gamma value, N representing a target gray level value, LN+m1Represents the first luminance mean value, LN+m2Denotes a second luminance average value, m1 denotes a first difference value, and m2 denotes a second difference value.
In a possible implementation manner of the first aspect, determining, according to the target gamma value and the target brightness value of the target display area at the target gray scale value, a compensation gray scale value of each sub-pixel of the target display area at the target gray scale value includes:
calculating the compensation gray-scale value of each sub-pixel of the target display area under the target gray-scale value according to the formula (2):
wherein N isxRepresents the compensated gray level, LXRepresenting a target brightness value, LNRepresenting the actual luminance value of the sub-pixel at the target gray scale value.
In a possible implementation of the first aspect, the absolute value of the first difference is equal to the absolute value of the second difference.
In a possible implementation manner of the first aspect, the display panel to be compensated has a first display area and a second display area, the light transmittance of the first display area is greater than that of the second display area, and the target display area includes the first display area.
In a possible implementation manner of the first aspect, the target brightness value is a brightness average value of the second display area at the target gray-scale value.
In a possible implementation manner of the first aspect, before obtaining a first brightness average value of a target display area of a display panel to be compensated at a first gray-scale value and a second brightness average value at a second gray-scale value, the method further includes:
acquiring a first brightness value of each sub-pixel of the target display area under a first gray scale value and a second brightness value under a second gray scale value;
determining a first brightness mean value according to each first brightness value;
and determining a second brightness mean value according to the second brightness values.
In a possible implementation manner of the first aspect, before obtaining a first brightness average value of a target display area of a display panel to be compensated at a first gray-scale value and a second brightness average value at a second gray-scale value, the method further includes:
compensating each sub-pixel of the target display area to enable the brightness of each sub-pixel to be compensated to a target brightness value, and obtaining an initial compensation gray-scale value of each sub-pixel under the target gray-scale value;
and determining a preset compensation range according to each initial compensation gray-scale value.
In a second aspect, an embodiment of the present application provides a compensation gray level determining apparatus, which includes:
the brightness mean value acquisition module is used for acquiring a first brightness mean value of a target display area of the display panel to be compensated under a first gray scale value and a second brightness mean value under a second gray scale value;
the gamma value determining module is used for determining a target gamma value of the target display area under a target gray level value according to a first brightness mean value and a second brightness mean value, wherein the first gray level value is smaller than or equal to the target gray level value, the second gray level value is larger than or equal to the target gray level value, and a first difference value between the first gray level value and the target gray level value and a second difference value between the second gray level value and the target gray level value are both within a preset range;
and the compensation gray scale determining module is used for determining the compensation gray scale value of each sub-pixel of the target display area under the target gray scale value according to the target gamma value and the target brightness value of the target display area under the target gray scale value.
In a third aspect, an embodiment of the present application provides a compensation gray scale determining apparatus, including: a processor and a memory storing computer program instructions;
the processor, when executing the computer program instructions, implements the compensation gray scale determination method of the first aspect.
In a fourth aspect, the present application provides a computer storage medium having computer program instructions stored thereon, which when executed by a processor implement the compensation gray level determination method according to the first aspect.
According to the embodiment of the application, the target gamma value corresponding to the target gray-scale value is determined according to the first brightness mean value of the target display area of the display panel to be compensated under the first gray-scale value and the second brightness mean value of the target display area under the second gray-scale value, and the first difference value between the first gray-scale value and the target gray-scale value and the second difference value between the second gray-scale value and the target gray-scale value are both in the preset compensation range, so that the determined target gamma value meets the actual condition of the target display area under the target gray-scale value, the situation that the compensation gray scale is determined by using the same gamma value when the display panel is subjected to Demura compensation is avoided, the compensation gray-scale value determined according to the determined target gamma value is more accurate, and the display panel is prevented from having color cast.
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Other features, objects, and advantages of the present application will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
FIG. 1 is a schematic gamma curve diagram of a green sub-pixel of a display panel according to an embodiment of the present disclosure;
FIG. 2 is a flow chart illustrating a compensation gray level determination method according to an embodiment of the present application;
FIG. 3 is a flow chart illustrating a compensation gray level determination method according to another embodiment of the present application;
FIG. 4 is a flow chart illustrating a compensation gray level determination method according to another embodiment of the present application;
fig. 5 is a schematic structural diagram of a display panel to be compensated according to an embodiment of the present application;
FIG. 6 is a schematic structural diagram of a compensated gray level determination apparatus according to an embodiment of the present application;
FIG. 7 is a schematic structural diagram of a compensated gray scale determining apparatus according to another embodiment of the present application;
fig. 8 illustrates a schematic structural diagram of a compensation voltage determining apparatus according to an embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Fig. 1 shows a gamma curve diagram of a green sub-pixel of a display panel according to an embodiment of the present disclosure. Fig. 1 shows a gamma curve with a gamma value of 2.25, a gamma curve with a gamma value of 2.45 and an actual luminance curve of a green sub-pixel at different gray levels. As can be seen from fig. 1, the actual luminance curve of the green sub-pixel is closer to the gamma curve with a gamma value of 2.25 at the low gray scale, and the actual luminance curve of the green sub-pixel is closer to the gamma curve with a gamma value of 2.45 at the high gray scale. Therefore, the display panel has the problems of poor uniformity of gamma values and large error of gamma curves, and if the compensation is performed by the same gamma value, the display panel after the compensation still has the problem of color cast.
In order to solve the above problems, embodiments of a compensation gray scale determining method, a compensation gray scale determining device, a compensation gray scale determining apparatus, and a computer storage medium are provided in the present application, and embodiments of the compensation gray scale determining method, the compensation gray scale determining device, and the compensation gray scale determining apparatus will be described below with reference to the accompanying drawings.
The embodiment of the present application provides a compensation gray scale determining method, which is used for determining a compensation gray scale value of a display panel to be compensated, where the display panel to be compensated may be an Organic Light Emitting Diode (OLED) display panel.
FIG. 2 is a flowchart illustrating a compensation gray level determination method according to an embodiment of the present application. As shown in fig. 2, the compensation gray level determining method according to the embodiment of the present application includes steps 110 to 130.
Step 110, a first brightness average value of a target display area of the display panel to be compensated under a first gray scale value and a second brightness average value under a second gray scale value are obtained.
And 120, determining a target gamma value of the target display area under a target gray-scale value according to the first brightness mean value and the second brightness mean value, wherein the first gray-scale value is less than or equal to the target gray-scale value, the second gray-scale value is greater than or equal to the target gray-scale value, and a first difference between the first gray-scale value and the target gray-scale value and a second difference between the second gray-scale value and the target gray-scale value are both within a preset compensation range.
According to the embodiment of the application, the target gamma value corresponding to the target gray-scale value is determined according to the first brightness mean value of the target display area of the display panel to be compensated under the first gray-scale value and the second brightness mean value of the target display area under the second gray-scale value, and the first difference value between the first gray-scale value and the target gray-scale value and the second difference value between the second gray-scale value and the target gray-scale value are both in the preset compensation range, so that the determined target gamma value meets the actual condition of the target display area under the target gray-scale value, the situation that the compensation gray scale is determined by using the same gamma value when the display panel is subjected to Demura compensation is avoided, the compensation gray-scale value determined according to the determined target gamma value is more accurate, and the display panel is prevented from having color cast.
FIG. 3 is a flow chart illustrating a compensation gray level determination method according to another embodiment of the present application. In some optional embodiments, as shown in fig. 3, before step 110, the method for determining the compensation gray scale provided in the embodiment of the present application may further include steps 140 to 160.
In step 140, a first luminance value of each sub-pixel of the target display area at the first gray scale value and a second luminance value at the second gray scale value are obtained.
And step 160, determining a second brightness mean value according to the second brightness value.
For example, the target display area may be a partial display area of the display panel to be compensated, or may be the entire display area of the display panel to be compensated, and the display panel to be compensated may be tested in advance to determine an area with a poor uniformity of gamma values or a large error of gamma curves, so as to determine the target display area. This is not a limitation of the present application.
Illustratively, the display panel to be compensated may include at least three colors of sub-pixels. For example, the display panel to be compensated includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, and the determination of the compensation gray scale can be performed on the sub-pixels of each color respectively. For example, a 32-gray-scale red picture can be input to the display panel to be compensated to light up the display panel to be compensated. If part of the display area of the display panel to be compensated is the target display area, only the target display area may be lighted, or the whole display area may be lighted.
Specifically, after the display panel to be compensated is lit, the target display area may be photographed by using an optical measurement Device, such as a color analyzer CA310 or a color analyzer CA410, or by using a high resolution and high precision camera, such as a Charge Coupled Device (CCD) camera, to obtain luminance data. The whole display area of the display panel to be compensated can be photographed, namely the photographed area comprises the whole display area, and only the brightness data corresponding to the target display area can be adopted in the subsequent process. It is also possible to photograph only the target display area of the display panel to be compensated, i.e., the photographed area includes only the target display area.
Illustratively, the target gray-scale value may be any gray-scale value that the display panel to be compensated can display. For example, the display panel to be compensated is an 8-bit display panel, that is, the display panel to be compensated has 256 levels of gray scales of 0 to 255, and the target gray scale value may be any one of 0 to 255. For example, in the process of determining the compensation gray scale of the display panel to be compensated, the compensation gray scales under some designated gray scale binding points may be determined first, and then the compensation gray scale corresponding to the gray scale other than the gray scale binding points may be determined by using a linear interpolation method. Specifically, the target gray scale value may be any one of 32 gray scale, 64 gray scale, 96 gray scale, 128 gray scale, 160 gray scale, 192 gray scale, 224 gray scale and 255 gray scale. It can be understood that, when the target gray scale value is 255 gray scales, if the actual brightness of the 255 gray scales does not reach the target brightness, in order to perform upward compensation on the display panel to be compensated (the compensation gray scale value corresponding to the 255 gray scales is greater than 0), after performing gamma debugging on the display panel to be compensated, some gamma data above the 255 gray scales may be stored, for example, data voltages corresponding to the 256 gray scales to 260 gray scales are stored, so that the second gray scale value is greater than the target gray scale value. When the target gray level is 0 gray level, the first gray level is 0 because the display panel cannot display negative gray levels.
Taking the red sub-pixel as an example, and taking the target gray-scale value as 32 and the preset compensation range as-2 gray-scale to 2 gray-scale as an example, the first gray-scale value may be 30 and the second gray-scale value may be 34. The luminance data obtained in step 140 may include luminance parameters of the red sub-pixel in the target display area of the display panel to be compensated at the first gray scale value and the second gray scale value. The luminance data may be specifically implemented as a CSV data file, that is, the CSV data file stores luminance parameters of red subpixels in a target display area of the display panel to be compensated under a first gray scale value and a second gray scale value.
In some examples, the luminance parameter of each color of the sub-pixel of the target display area of the display panel to be compensated at the first gray scale value or the second gray scale value may be obtained by capturing the display panel to be compensated one or more times, and is not limited herein.
In step 150, the first luminance values of the sub-pixels may be summed, and a ratio of the sum of the first luminance values to the number of the sub-pixels may be calculated to obtain a first luminance mean value. Or, the first brightness values with obvious deviation can be filtered, and the ratio of the sum of the filtered first brightness values to the number of the filtered first brightness values is calculated to obtain the first brightness average value. Step 160 can be similar and will not be described herein.
According to the embodiment of the application, the first brightness mean value of each sub-pixel in the target display area under the first gray scale value and the second brightness mean value of each sub-pixel in the target display area under the second gray scale value can be accurately determined by obtaining the first brightness value of each sub-pixel in the target display area under the first gray scale value and the second brightness value of each sub-pixel in the target display area under the second gray scale value, and therefore the accuracy of the subsequently determined target gamma value is guaranteed.
The Gamma curve represents the corresponding relation between each gray scale and the brightness, the range of the gray scale which can be displayed by the display panel to be compensated is 0-255, and the Gamma value is GammatrendFor example, LmaxIndicating a luminance value at a gray scale value of 255 and a luminance value L at a gray scale value of N1N1Can be determined by the following formula (1.1):
similarly, at the gray level value N2, the brightness value LN2Can be determined by the following formula (1.2):
formula (1.3) is obtained by dividing formula (1.1) by formula (1.2):
further obtaining formula (1.4):
let N denote the target gray level value, N1 denote the first gray level value, N2 denote the second gray level value, i.e., N1 ═ N + m1, N2 ═ N + m2, N1 < N2, Gammatrend＝GammaratioIn some optional embodiments, in step 120, a target gamma value of the target display area at the target gray scale value may be calculated according to equation (1):
wherein, GammaratioRepresenting a target gamma value, N representing a target gray level value, LN+m1Represents the first luminance mean value, LN+m2Denotes a second luminance average value, m1 denotes a first difference value, and m2 denotes a second difference value. It is understood that m1 is a negative number.
The target gamma value is calculated according to the above equation (1), and the accuracy can be improved.
In some alternative embodiments, in step 130, the compensation gray-scale value of each sub-pixel of the target display area at the target gray-scale value can be calculated according to equation (2):
wherein N isxRepresents the compensated gray level, LXRepresenting a target brightness value, LNRepresenting the actual luminance value of the sub-pixel at the target gray scale value.
According to the formula (2), the required compensation gray scale value can be accurately obtained.
LXThe brightness of the display area to be compensated may be a preset value set according to a requirement, or a brightness average value of the target display area under the target gray scale value, or a brightness average value of the entire display area of the display panel to be compensated under the target gray scale value, which is not limited in the present application.
It will be appreciated that LNI.e. the actual luminance value of the sub-pixel before compensation. For example, the compensation gray level determining method provided by the embodiment of the present application may further include: and acquiring the actual brightness value of each sub-pixel of the target display area under the target gray-scale value. Specifically, the actual luminance value may be obtained in the same manner as the first luminance value and the second luminance value, which is not limited in this application.
In some alternative embodiments, the absolute values of the first difference and the second difference may be equal, i.e., | m1| ═ m2 |. That is, the target gamma value is the same as the difference between the first gray value and the second gray value, so that the target gamma value can be determined more accurately.
FIG. 4 is a flowchart illustrating a compensation gray level determination method according to another embodiment of the present application. In some optional embodiments, as shown in fig. 4, before step 110, the compensation gray level determining method provided in the embodiment of the present application may further include step 170 and step 180.
Step 170, compensating each sub-pixel of the target display area to compensate the brightness of each sub-pixel to the target brightness value, and obtaining an initial compensation gray-scale value of each sub-pixel under the target gray-scale value.
And step 180, determining a preset compensation range according to each initial compensation gray-scale value.
For example, taking the target gray-scale value as 32 gray-scale, the initial compensation gray-scale value of each sub-pixel may be set according to experience, and whether the display brightness of each sub-pixel compensated by the initial compensation gray-scale value meets the target brightness value is determined, if not, the specific value of the initial compensation gray-scale value is continuously adjusted until the display brightness of each sub-pixel compensated by the adjusted initial compensation gray-scale value meets the target brightness value. Here, the target luminance value may be L in the aboveX。
For example, the initial compensation gray-scale values of the sub-pixels may be 2, 1, 0, -1, -2, etc., and in step 180, the maximum value of the initial compensation gray-scale values may be used as the upper limit of the preset compensation range, and the minimum value of the initial compensation gray-scale values may be used as the lower limit of the preset compensation range. The upper limit of the preset compensation range may be greater than 0 and the largest number ratio among the initial compensation gray-scale values, and the lower limit of the preset compensation range may be less than 0 and the largest number ratio among the initial compensation gray-scale values, which is not limited in the present application.
According to the embodiment of the application, the preset compensation range can be more accurately determined by performing the pre-compensation on each sub-pixel of the target display area, so that the target gamma value can be more accurately determined.
As shown in fig. 5, the display panel may have a first display region a11 and a second display region a 12. Both the first display region a11 and the second display region a12 may display images. In some examples, the light transmittance of the first display region a11 is greater than that of the second display region a 12. The first display area a11 may be considered a transparent display area, i.e., a sub-screen area of the display panel. The second display area a12 may be considered to be the main screen area of the display panel. For example, the light transmittance of the first display region a11 is greater than or equal to 15%. In order to ensure that the light transmittance of the first display area a11 is greater than 15%, even greater than 40%, or even higher, the light transmittance of each functional film layer of the display panel in this embodiment may be greater than 80%, and even at least some of the functional film layers may have a light transmittance greater than 90%.
The back of the first display area A11 of the display panel of the embodiment of the application can be integrated with photosensitive components, so that the screen-down integration of the photosensitive components such as a camera is realized. The first display area A11 can also display images, so that the display area of the display panel is increased, and the overall screen design of the display device is realized.
The inventor of the present application finds that, in a full-screen, the gamma value uniformity of the first display area a11 corresponding to the photosensitive element is poor, and the gamma curve error is large. Accordingly, the target display area herein may include the first display area a11 to solve the problem of compensating for color cast due to large gamma deviation of the first display area a 11.
In addition, in order to ensure that the light transmittance of the first display area a11 can meet the standard requirements, the pixel arrangement and the driving circuit structure design in the first display area a11 are different from those in the second display area a 12. Due to the different structures of the first display region a11 and the second display region a12, the visual brightness of the first display region a11 and the visual brightness of the second display region a12 are different. The visual brightness of the first display region a11 refers to the brightness of the first display region a11 as perceived by the human eye. The visual brightness of the second display region a12 refers to the brightness of the second display region a12 as perceived by the human eye.
In order to improve the display effect, the target brightness value in the above steps may be a brightness average value of the second display area at the target gray scale value, so as to reduce the difference in visual brightness between the first display area a11 and the second display area a12, and improve the display effect.
In some optional embodiments, after step 130, the compensation gray level determining method provided in the embodiments of the present application may further include: and storing the compensation electric gray scale value into a storage module of the display panel to be compensated. Therefore, the display panel to be compensated can directly call the pre-stored compensation gray-scale value in the actual display process, and the compensation efficiency can be improved.
FIG. 6 is a schematic structural diagram of a compensated gray level determining apparatus according to an embodiment of the present application. As shown in fig. 6, the compensation gray level determining apparatus 600 according to the embodiment of the present disclosure includes a luminance mean value obtaining module 601, a gamma value determining module 602, and a compensation gray level determining module 603.
The luminance average value obtaining module 601 is configured to obtain a first luminance average value of a target display area of the display panel to be compensated at a first gray scale value and a second luminance average value at a second gray scale value;
a gamma value determining module 602, configured to determine a target gamma value of the target display area at a target gray level value according to a first brightness average value and a second brightness average value, where the first gray level value is less than or equal to the target gray level value, the second gray level value is greater than or equal to the target gray level value, and a first difference between the first gray level value and the target gray level value and a second difference between the second gray level value and the target gray level value are both within a preset range;
the compensation gray level determining module 603 is configured to determine a compensation gray level value of each sub-pixel of the target display area at the target gray level value according to the target gamma value and the target brightness value of the target display area at the target gray level value.
According to the embodiment of the application, the target gamma value corresponding to the target gray-scale value is determined according to the first brightness mean value of the target display area of the display panel to be compensated under the first gray-scale value and the second brightness mean value of the target display area under the second gray-scale value, and the first difference value between the first gray-scale value and the target gray-scale value and the second difference value between the second gray-scale value and the target gray-scale value are both in the preset compensation range, so that the determined target gamma value meets the actual condition of the target display area under the target gray-scale value, the situation that the compensation gray scale is determined by using the same gamma value when the display panel is subjected to Demura compensation is avoided, the compensation gray-scale value determined according to the determined target gamma value is more accurate, and the display panel is prevented from having color cast.
In some optional embodiments, the gamma value determining module 602 is specifically configured to calculate a target gamma value of the target display area at the target gray scale value according to the above equation (1).
In some alternative embodiments, the compensation gray level determining module 603 is specifically configured to calculate the compensation gray level value of each sub-pixel of the target display area at the target gray level value according to the above equation (2).
In some alternative embodiments, the absolute values of the first difference and the second difference are equal.
In some optional embodiments, the display panel to be compensated has a first display area and a second display area, the light transmittance of the first display area is greater than that of the second display area, and the target display area includes the first display area.
In some alternative embodiments, the target brightness value is a brightness average of the second display area at the target gray scale value.
In some optional embodiments, as shown in fig. 7, the compensation gray-scale determining apparatus 600 provided in the embodiment of the present application may further include a luminance value obtaining module 604 and a luminance average value calculating module 605.
The luminance value obtaining module 604 is configured to obtain a first luminance value of each sub-pixel of the target display area at a first gray scale value and a second luminance value of each sub-pixel of the target display area at a second gray scale value.
A luminance mean value calculating module 605, configured to determine a first luminance mean value according to each first luminance value; and determining a second brightness mean value according to the second brightness values.
In some optional embodiments, as shown in fig. 7, the compensation gray level determining apparatus 600 provided in the embodiment of the present application may further include a compensation range determining module 606.
A compensation range determining module 606, configured to compensate each sub-pixel in the target display area, so that the brightness of each sub-pixel is compensated to a target brightness value, and an initial compensation gray scale value of each sub-pixel under the target gray scale value is obtained; and determining a preset compensation range according to each initial compensation gray-scale value.
In some optional embodiments, please continue to refer to fig. 7, the compensation gray level determining apparatus 600 provided in the present embodiment may further include a pre-storing module 607. The pre-storing module 607 is configured to store the compensated gray scale value in the storage module of the display panel to be compensated.
The compensation gray scale determining device in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal. The device can be mobile electronic equipment or non-mobile electronic equipment. By way of example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and the non-mobile electronic device may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine or a self-service machine, and the like, and the embodiments of the present application are not particularly limited.
The compensation gray level determination device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.
Fig. 8 is a schematic diagram illustrating a hardware structure of the compensation voltage determining apparatus according to the embodiment of the present invention.
The compensation voltage determination device may comprise a processor 801 and a memory 802 in which computer program instructions are stored.
Specifically, the processor 801 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured as one or more Integrated circuits implementing embodiments of the present invention.
Memory 802 may include mass storage for data or instructions. By way of example, and not limitation, memory 802 may include a Hard Disk Drive (HDD), a floppy Disk Drive, flash memory, an optical Disk, a magneto-optical Disk, a tape, or a Universal Serial Bus (USB) Drive or a combination of two or more of these. Memory 802 may include removable or non-removable (or fixed) media, where appropriate. The memory 802 may be internal or external to the integrated gateway disaster recovery device, where appropriate. In a particular embodiment, the memory 802 is a non-volatile solid-state memory. In a particular embodiment, the memory 802 includes Read Only Memory (ROM). Where appropriate, the ROM may be mask-programmed ROM, Programmable ROM (PROM), Erasable PROM (EPROM), Electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory or a combination of two or more of these.
The processor 801 reads and executes computer program instructions stored in the memory 802 to implement any one of the compensation voltage determination methods in the above-described embodiments.
In one example, the compensation voltage determination device may also include a communication interface 803 and a bus 810. As shown in fig. 8, the processor 801, the memory 802, and the communication interface 803 are connected via a bus 810 to complete communication therebetween.
The communication interface 803 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present invention.
Bus 810 includes hardware, software, or both to couple the components of the compensation voltage determination device to each other. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hypertransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus or a combination of two or more of these. Bus 810 may include one or more buses, where appropriate. Although specific buses have been described and shown in the embodiments of the invention, any suitable buses or interconnects are contemplated by the invention.
The compensation gray scale determining apparatus may perform the compensation gray scale determining method in the embodiment of the present application, thereby implementing the compensation gray scale determining method and the compensation electrical gray scale determining device described in conjunction with fig. 1 and 6.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the compensation gray scale determining method in the foregoing embodiments can be implemented, and the same technical effect can be achieved. The computer-readable storage medium may include a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like, which is not limited herein.
In accordance with the embodiments of the present application as described above, these embodiments are not exhaustive and do not limit the application to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and its practical application, to thereby enable others skilled in the art to best utilize the application and its various modifications as are suited to the particular use contemplated. The application is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A method for compensating a gray level determination, the method comprising:
acquiring a first brightness mean value of a target display area of a display panel to be compensated under a first gray scale value and a second brightness mean value under a second gray scale value;
determining a target gamma value of the target display area under a target gray-scale value according to the first brightness mean value and the second brightness mean value, wherein the first gray-scale value is less than or equal to the target gray-scale value, the second gray-scale value is greater than or equal to the target gray-scale value, and a first difference value between the first gray-scale value and the target gray-scale value and a second difference value between the second gray-scale value and the target gray-scale value are both within a preset compensation range;
and determining the compensation gray-scale value of each sub-pixel of the target display area under the target gray-scale value according to the target gamma value and the target brightness value of the target display area under the target gray-scale value.
2. The method as claimed in claim 1, wherein determining the target gamma value of the target display area at the target gray level value according to the first brightness average and the second brightness average comprises:
calculating a target gamma value of the target display area at a target gray scale value according to equation (1):
wherein, GammaratioRepresenting the target gamma value, N representing the target gray level value, LN+m1Representing said first luminance mean value, LN+m2Represents the second luminance mean value, m1 represents the first difference value, and m2 represents the second difference value.
3. The method of claim 2, wherein determining the compensation gray level of each sub-pixel of the target display area at the target gray level according to the target gamma value and the target brightness value of the target display area at the target gray level comprises:
calculating the compensation gray-scale value of each sub-pixel of the target display area under the target gray-scale value according to the formula (2):
wherein N isxRepresenting said compensated gray level value, LXRepresents the target brightness value, LNRepresenting the actual luminance value of the sub-pixel at the target gray scale value.
4. The method of claim 2, wherein the absolute values of said first difference and said second difference are equal.
5. The compensation gray scale determination method of claim 1, wherein the display panel to be compensated has a first display area and a second display area, the light transmittance of the first display area is greater than that of the second display area, and the target display area comprises the first display area.
6. The method as claimed in claim 5, wherein the target brightness value is a brightness average value of the second display region at the target gray scale value.
7. The method as claimed in claim 1, wherein before the obtaining a first brightness average value of a target display area of the display panel to be compensated at a first gray scale value and a second brightness average value at a second gray scale value, the method further comprises:
acquiring a first brightness value of each sub-pixel of the target display area under the first gray scale value and a second brightness value under the second gray scale value;
determining the first brightness mean value according to each first brightness value;
and determining the second brightness mean value according to each second brightness value.
8. The method as claimed in claim 1, wherein before the obtaining a first brightness average value of a target display area of the display panel to be compensated at a first gray scale value and a second brightness average value at a second gray scale value, the method further comprises:
compensating each sub-pixel of the target display area to enable the brightness of each sub-pixel to be compensated to the target brightness value, and obtaining an initial compensation gray-scale value of each sub-pixel under the target gray-scale value;
and determining the preset compensation range according to each initial compensation gray-scale value.
9. A compensation gray scale determining apparatus for a display panel to be compensated, the apparatus comprising:
the brightness mean value acquisition module is used for acquiring a first brightness mean value of a target display area of the display panel to be compensated under a first gray scale value and a second brightness mean value under a second gray scale value;
a gamma value determining module, configured to determine a target gamma value of the target display area at a target gray level value according to the first brightness mean value and the second brightness mean value, where the first gray level value is less than or equal to the target gray level value, the second gray level value is greater than or equal to the target gray level value, and a first difference between the first gray level value and the target gray level value and a second difference between the second gray level value and the target gray level value are both within a preset range;
and the compensation gray scale determining module is used for determining the compensation gray scale value of each sub-pixel of the target display area under the target gray scale value according to the target gamma value and the target brightness value of the target display area under the target gray scale value.
10. A compensated gamma determination device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the compensated gamma determination method of any of claims 1 to 9.
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