CN109377935B - Brightness compensation method and device and electroluminescent display device - Google Patents
Brightness compensation method and device and electroluminescent display device Download PDFInfo
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- CN109377935B CN109377935B CN201811502832.8A CN201811502832A CN109377935B CN 109377935 B CN109377935 B CN 109377935B CN 201811502832 A CN201811502832 A CN 201811502832A CN 109377935 B CN109377935 B CN 109377935B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
Abstract
The invention provides a brightness compensation method and device and an electroluminescent display device, and belongs to the technical field of display. The brightness compensation method is applied to an electroluminescent display device with a DeMura circuit, and comprises the following steps: acquiring DeMura data of the DeMura circuit, wherein the DeMura data comprises DeMura compensation data and/or original brightness data of each pixel in a display area of the electroluminescent display device; dividing the display area into a plurality of compensation areas; and calculating brightness compensation data of each compensation area according to the DeMura data, and performing brightness compensation on each compensation area according to the brightness compensation data. The technical scheme of the invention can realize the compensation of the uneven brightness condition under the condition of not increasing the hardware cost of the electroluminescent display device.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a method and an apparatus for luminance compensation and an electroluminescent display device.
Background
For the electroluminescent display device, because the cathode of the electroluminescent display device has a certain resistance, the current on the cathode gradually decreases from the direction close to the driving circuit to the direction far away from the driving circuit, and the electroluminescent display device has the condition of uneven brightness. In order to compensate the uneven brightness, a brightness compensation circuit is added in the electroluminescent display device in the prior art, and the electroluminescent display device is specially photographed and compensated for data calculation, but the hardware cost of the electroluminescent display device is increased.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and an apparatus for brightness compensation and an electroluminescent display device, which can compensate the uneven brightness without increasing the hardware cost of the electroluminescent display device.
To solve the above technical problem, embodiments of the present invention provide the following technical solutions:
in one aspect, a brightness compensation method is provided, which is applied to an electroluminescent display device having a DeMura circuit, and the method includes:
acquiring DeMura data of the DeMura circuit, wherein the DeMura data comprises DeMura compensation data and/or original brightness data of each pixel in a display area of the electroluminescent display device;
dividing the display area into a plurality of compensation areas;
and calculating brightness compensation data of each compensation area according to the DeMura data, and performing brightness compensation on each compensation area according to the brightness compensation data.
Further, when the DeMura data includes original luminance data of each pixel of the display region, the calculating luminance compensation data of each compensation region according to the DeMura data includes:
calculating the average brightness data of each compensation area according to the original brightness data of each pixel;
and calculating the brightness compensation data of each compensation area according to the average brightness data.
Further, the calculating the brightness compensation data of each compensation area according to the average brightness data comprises:
and calculating the brightness compensation data y of each compensation area by using the formula of y ═ ax + b + c, wherein x is the average brightness data, a is the compensation gain, b is the DeMura offset value, and c is the brightness compensation offset value.
Further, when the DeMura data includes DeMura compensation data, the calculating the luminance compensation data of each compensation region according to the DeMura data includes:
calculating average DeMura compensation data of each compensation area according to the DeMura compensation data corresponding to each compensation area;
and calculating the brightness compensation data of each compensation area according to the average DeMura compensation data.
Further, the calculating the brightness compensation data of each compensation area according to the average brightness data comprises:
and calculating the brightness compensation data y of each compensation area by using the formula of y-k + c, wherein k is the average DeMura compensation data, and c is a brightness compensation offset value.
Further, the dividing the display area into a plurality of compensation areas comprises:
dividing the display area into a plurality of rectangular compensation areas arranged along a first direction, wherein the length of the compensation areas in a second direction is equal to the length of the display area in the second direction, the first direction is from a driving circuit close to the electroluminescent display device to a direction far away from the driving circuit, and the second direction is perpendicular to the first direction.
The embodiment of the invention also provides a brightness compensation device, which is applied to an electroluminescent display device with a DeMura circuit, and comprises:
an obtaining circuit, configured to obtain DeMura data of the DeMura circuit, where the DeMura data includes DeMura compensation data and/or original luminance data of each pixel in a display area of the electroluminescent display device;
a dividing circuit for dividing the display area into a plurality of compensation areas;
and the processing circuit is used for calculating the brightness compensation data of each compensation area according to the DeMura data and performing brightness compensation on each compensation area according to the brightness compensation data.
Further, when the DeMura data includes original luminance data for each pixel of the display region,
the processing circuit is specifically used for calculating the average brightness data of each compensation area according to the original brightness data of each pixel; and calculating the brightness compensation data of each compensation area according to the average brightness data.
Further, when the DeMura data includes DeMura compensation data,
the processing circuit is specifically configured to calculate average DeMura compensation data of each compensation region according to the DeMura compensation data corresponding to each compensation region; and calculating the brightness compensation data of each compensation area according to the average DeMura compensation data.
The embodiment of the invention also provides an electroluminescent display device which comprises the brightness compensation device.
An embodiment of the present invention further provides a luminance compensation apparatus, including: a memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the brightness compensation method as described above.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the brightness compensation method as described above.
The embodiment of the invention has the following beneficial effects:
in the above scheme, DeMura data is obtained from a DeMura circuit, luminance compensation data of each compensation region is calculated according to the DeMura data, and luminance compensation is performed on each compensation region according to the luminance compensation data. According to the technical scheme, a new hardware circuit is not required to be added to photograph the electroluminescent display device, the brightness compensation data can be obtained by directly utilizing the DeMura data of the existing DeMura circuit, and the compensation for the uneven brightness condition can be realized under the condition that the hardware cost of the electroluminescent display device is not increased.
Drawings
FIG. 1 is a flowchart illustrating a brightness compensation method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a luminance compensation device according to an embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
Embodiments of the present invention provide a brightness compensation method and apparatus, and an electroluminescent display device, which can compensate for the uneven brightness without increasing the hardware cost of the electroluminescent display device. The electroluminescent display device may be, for example, an organic electroluminescent display device, a quantum dot light emitting display device, or the like.
An embodiment of the present invention provides a brightness compensation method, which is applied to an electroluminescent display device with a DeMura circuit, and as shown in fig. 1, the method includes:
step 101: acquiring DeMura data of the DeMura circuit, wherein the DeMura data comprises DeMura compensation data and/or original brightness data of each pixel in a display area of the electroluminescent display device;
step 102: dividing the display area into a plurality of compensation areas;
step 103: and calculating brightness compensation data of each compensation area according to the DeMura data, and performing brightness compensation on each compensation area according to the brightness compensation data.
In this embodiment, DeMura data is obtained from a DeMura circuit, luminance compensation data of each compensation region is calculated according to the DeMura data, and luminance compensation is performed on each compensation region according to the luminance compensation data. According to the technical scheme, a new hardware circuit is not required to be added to photograph the electroluminescent display device, the brightness compensation data can be obtained by directly utilizing the DeMura data of the existing DeMura circuit, and the compensation for the uneven brightness condition can be realized under the condition that the hardware cost of the electroluminescent display device is not increased.
In the process of manufacturing the electroluminescent display device, the bright spot phenomenon of the electroluminescent display device is easily caused by factors such as process level, raw material purity and the like, which is called mura phenomenon, and in order to improve the mura phenomenon, the display data of sub-pixels in the electroluminescent display device are compensated by adopting a demura technology. When the DeMura circuit is used for compensation, an image acquisition device is used for photographing from the front side of the electroluminescent display device to obtain original brightness data of each sub-pixel, a display area of the electroluminescent display device is divided into a plurality of blocks (blocks), and DeMura compensation data of each block are determined according to the brightness data of each sub-pixel. For example, the DeMura circuit generally divides the display area into a plurality of 4 × 4 blocks, that is, each block includes 4 rows and 4 columns of sub-pixels, and the DeMura compensation data of the block is obtained according to the original luminance data of the sub-pixels in the block.
In this embodiment, when performing luminance compensation on the electroluminescence display device to improve the uneven luminance of the electroluminescence display device, the original luminance data of each sub-pixel in the display area is not acquired again, but the DeMura data of the DeMura circuit is directly used for luminance compensation, so that a new hardware circuit is not required to be added to photograph the electroluminescence display device, and the compensation for the uneven luminance can be realized without increasing the hardware cost of the electroluminescence display device. The DeMura data may include original luminance data of each pixel of the display region, or may include DeMura compensation data of each block determined according to the original luminance data of each pixel.
In an embodiment, when the DeMura data includes original luminance data of each pixel of the display region, the calculating luminance compensation data of each compensation region according to the DeMura data includes:
calculating the average brightness data of each compensation area according to the original brightness data of each pixel;
and calculating the brightness compensation data of each compensation area according to the average brightness data.
Further, the calculating the brightness compensation data of each compensation area according to the average brightness data comprises:
and calculating the brightness compensation data y of each compensation area by using the formula of y ═ ax + b + c, wherein x is the average brightness data, a is the compensation gain, b is the DeMura offset value, and c is the brightness compensation offset value.
In another specific embodiment, when the DeMura data includes DeMura compensation data, the calculating the luminance compensation data of each compensation region according to the DeMura data includes:
calculating average DeMura compensation data of each compensation area according to the DeMura compensation data corresponding to each compensation area;
and calculating the brightness compensation data of each compensation area according to the average DeMura compensation data.
Further, the calculating the brightness compensation data of each compensation area according to the average brightness data comprises:
and calculating the brightness compensation data y of each compensation area by using the formula of y-k + c, wherein k is the average DeMura compensation data, and c is a brightness compensation offset value.
Further, the dividing the display area into a plurality of compensation areas comprises:
dividing the display area into a plurality of rectangular compensation areas arranged along a first direction, wherein the length of the compensation areas in a second direction is equal to the length of the display area in the second direction, the first direction is from a driving circuit close to the electroluminescent display device to a direction far away from the driving circuit, and the second direction is perpendicular to the first direction.
Since the current is gradually decreased in the first direction, the luminance of the display area is gradually decreased in the first direction, there is substantially no decrease in the brightness of the display area in the second direction, and if a plurality of compensation areas arranged side by side are divided in the second direction, the brightness compensation data of the plurality of compensation areas may not be the same, performing brightness compensation on the compensation area according to the different brightness compensation data may not achieve the purpose of improving the brightness unevenness, therefore, the present embodiment divides the display area into a plurality of compensation areas in a first direction, and the length of the compensation area in a second direction is equal to the length of the display area in the second direction, therefore, a plurality of compensation regions which are arranged side by side cannot exist in the second direction, and the condition that the brightness is not uniform in the second direction after the brightness compensation can be avoided.
An embodiment of the present invention further provides a luminance compensation apparatus, which is applied to an electroluminescent display device having a DeMura circuit, and as shown in fig. 2, the apparatus includes:
an obtaining circuit 21, configured to obtain DeMura data of the DeMura circuit, where the DeMura data includes DeMura compensation data and/or original luminance data of each pixel in a display area of the electroluminescent display device;
a dividing circuit 22 for dividing the display area into a plurality of compensation areas;
and the processing circuit 23 is configured to calculate luminance compensation data of each compensation region according to the DeMura data, and perform luminance compensation on each compensation region according to the luminance compensation data.
In this embodiment, DeMura data is obtained from a DeMura circuit, luminance compensation data of each compensation region is calculated according to the DeMura data, and luminance compensation is performed on each compensation region according to the luminance compensation data. According to the technical scheme, a new hardware circuit is not required to be added to photograph the electroluminescent display device, the brightness compensation data can be obtained by directly utilizing the DeMura data of the existing DeMura circuit, and the compensation for the uneven brightness condition can be realized under the condition that the hardware cost of the electroluminescent display device is not increased.
In the process of manufacturing the electroluminescent display device, the bright spot phenomenon of the electroluminescent display device is easily caused by factors such as process level, raw material purity and the like, which is called mura phenomenon, and in order to improve the mura phenomenon, the display data of sub-pixels in the electroluminescent display device are compensated by adopting a demura technology. When the DeMura circuit is used for compensation, an image acquisition device is used for photographing from the front side of the electroluminescent display device to obtain original brightness data of each sub-pixel, a display area of the electroluminescent display device is divided into a plurality of blocks (blocks), and DeMura compensation data of each block are determined according to the brightness data of each sub-pixel. For example, the DeMura circuit generally divides the display area into a plurality of 4 × 4 blocks, that is, each block includes 4 rows and 4 columns of sub-pixels, and the DeMura compensation data of the block is obtained according to the original luminance data of the sub-pixels in the block.
In this embodiment, when performing luminance compensation on the electroluminescence display device to improve the uneven luminance of the electroluminescence display device, the original luminance data of each sub-pixel in the display area is not acquired again, but the DeMura data of the DeMura circuit is directly used for luminance compensation, so that a new hardware circuit is not required to be added to photograph the electroluminescence display device, and the compensation for the uneven luminance can be realized without increasing the hardware cost of the electroluminescence display device. The DeMura data may include original luminance data of each pixel of the display region, or may include DeMura compensation data of each block determined according to the original luminance data of each pixel. As shown in fig. 2, the acquisition circuit 21 is connected to the DeMura circuit and can acquire DeMura data in the DeMura circuit.
In one embodiment, when the DeMura data comprises raw luminance data for each pixel of the display region,
the processing circuit is specifically used for calculating the average brightness data of each compensation area according to the original brightness data of each pixel; and calculating the brightness compensation data of each compensation area according to the average brightness data.
Specifically, the luminance compensation data y of each compensation region may be calculated by using the formula y ═ ax + b + c, where x is the average luminance data, a is the compensation gain, b is the DeMura offset value, and c is the luminance compensation offset value.
In another embodiment, when the DeMura data includes DeMura compensation data,
the processing circuit is specifically configured to calculate average DeMura compensation data of each compensation region according to the DeMura compensation data corresponding to each compensation region; and calculating the brightness compensation data of each compensation area according to the average DeMura compensation data.
Specifically, the luminance compensation data y for each compensation region may be calculated using the formula y-k + c, where k is the average DeMura compensation data and c is a luminance compensation offset value.
Specifically, the dividing circuit divides the display area into a plurality of rectangular compensation areas arranged along a first direction, the length of the compensation areas in a second direction is equal to the length of the display area in the second direction, the first direction is a direction from a driving circuit close to the electroluminescent display device to a direction away from the driving circuit, and the second direction is perpendicular to the first direction.
Since the current is gradually decreased in the first direction, the luminance of the display area is gradually decreased in the first direction, there is substantially no decrease in the brightness of the display area in the second direction, and if a plurality of compensation areas arranged side by side are divided in the second direction, the brightness compensation data of the plurality of compensation areas may not be the same, performing brightness compensation on the compensation area according to the different brightness compensation data may not achieve the purpose of improving the brightness unevenness, therefore, the present embodiment divides the display area into a plurality of compensation areas in a first direction, and the length of the compensation area in a second direction is equal to the length of the display area in the second direction, therefore, a plurality of compensation regions which are arranged side by side cannot exist in the second direction, and the condition that the brightness is not uniform in the second direction after the brightness compensation can be avoided.
The technical scheme of the invention is further described by combining the specific embodiments as follows:
because the electroluminescent display device is a current type device, the current is gradually reduced from the direction close to the driving circuit to the direction far away from the driving circuit, the brightness of the display area is gradually reduced, and the inconsistency of the brightness appears at different positions of the display area, thereby influencing the display effect of the electroluminescent display device. In order to compensate the uneven brightness, the invention provides a brightness compensation scheme, which utilizes the data of the existing DeMura circuit to realize the compensation of the uneven brightness.
The brightness compensation apparatus of this embodiment may be connected to the DeMura circuit independently of the DeMura circuit, and may acquire data of the DeMura circuit, or may be integrated in the DeMura circuit.
When the DeMura circuit compensates the display data of the sub-pixels in the electroluminescent display device by adopting the DeMura technology, a CCD (charge coupled device) camera is used for photographing a display area to obtain the original brightness data and the mura information of each sub-pixel. The DeMura compensation data is obtained by calculating the original luminance data of each sub-pixel.
The calculation formula of the existing DeMura compensation data is y1 ═ ax1+ b, where y1 is the DeMura compensation data, a is the preset compensation gain, b is the DeMura offset value, x1 is the average luminance data of the sub-pixels of each block, and DeMura offset value b is a parameter commonly used in the existing DeMura technology.
When performing demura compensation, the display region is generally divided into a plurality of relatively small blocks, for example, the display region is divided into a plurality of 4 × 4 blocks, that is, each block includes 4 rows and 4 columns of sub-pixels, because the divided blocks are relatively small, the mura compensation is mainly performed, and the compensation cannot be performed for the case of uneven brightness with relatively large difference, therefore, in this embodiment, when compensating the uneven brightness, the display region needs to be divided into a plurality of relatively large compensation regions, and each compensation region includes a plurality of blocks.
Since the current of the electroluminescent display device is gradually decreased in a first direction from a driving circuit close to the electroluminescent display device to a direction away from the driving circuit, the luminance of the display region is gradually decreased in the first direction, the luminance of the display region is not substantially decreased in a second direction perpendicular to the first direction, if a plurality of compensation regions arranged side by side are divided in the second direction, the luminance compensation data of the plurality of compensation regions may not be the same, and the luminance compensation of the compensation regions according to the different luminance compensation data may achieve the purpose of improving the luminance unevenness, and therefore, the present embodiment divides the display region into a plurality of compensation regions in the first direction, and the length of the compensation regions in the second direction is equal to the length of the display region in the second direction, so that a plurality of compensation regions arranged side by side do not exist in the second direction, it is possible to avoid the occurrence of luminance unevenness in the second direction after the luminance compensation.
Taking the resolution of the display area of 1440 × 2560 as an example, that is, the display area includes 1440 × 2560 sub-pixels, the display area can be divided into 16 compensation areas of 1440 × 160, that is, each compensation area includes 1440 × 160 sub-pixels. Of course, the number of compensation regions is not limited to 16, and may be adjusted according to actual conditions.
Specifically, the luminance compensation data for each compensation region may be calculated using the following formula on the basis of the formula for calculating DeMura compensation data: y is ax + b + c, where y is the luminance compensation data, a is the predetermined compensation gain, b is the DeMura offset value, x is the average luminance data of the sub-pixels of each compensation region, and c is the luminance compensation offset value.
The average brightness data x of each compensation region can be obtained according to the average brightness data x1 of a plurality of blocks included in the compensation region, and specifically, the average brightness data x of each compensation region is equal to the sum of the average brightness data x1 of the plurality of blocks divided by the number of blocks included in the compensation region.
In a specific example, the luminance compensation offset value c may be referred to as the DeMura offset value b, and an average value of DeMura offset values of a plurality of blocks included in each compensation region may be calculated and a value of the DeMura offset value may be used as the luminance compensation offset value, or after the average value of DeMura offset values of a plurality of blocks included in each compensation region is calculated, the average value is converted according to a set rule to obtain the luminance compensation offset value. Specifically, the offset value of each compensation area may be 8-bit data.
Of course, in the calculation formula for calculating the luminance compensation data y, y ═ ax + b + c, x may also be the original luminance data of the sub-pixel at the center point of each compensation region, and the original luminance data of the sub-pixel at the center point of each compensation region may be determined from the original luminance data of each sub-pixel acquired by the DeMura circuit.
After the brightness compensation data of each compensation area is obtained, the brightness compensation can be performed on each compensation area according to the brightness compensation data.
In this embodiment, the original luminance data of the sub-pixels is obtained from the DeMura circuit, the luminance compensation data of each compensation region is calculated according to the original luminance data of the sub-pixels, and the luminance compensation is performed on each compensation region according to the luminance compensation data, so that DeMura compensation and compensation for the uneven luminance can be simultaneously realized without increasing the hardware cost of the electroluminescent display device, and the time cost and the economic cost are saved.
Further, since (ax + b) exists in the formula for calculating the luminance compensation data and the DeMura compensation data, the calculation process can be further saved, and the DeMura compensation data can be directly utilized to determine the luminance compensation data. Specifically, the luminance compensation data y for each compensation region may be calculated according to the formula y-k + c, where k is the average DeMura compensation data and c is the luminance compensation offset value.
The average DeMura compensation data of each compensation region may be obtained according to the DeMura compensation data of the blocks included in each compensation region, and specifically, the average DeMura compensation data of each compensation region is equal to the sum of the DeMura compensation data of the blocks divided by the number of the blocks included in the compensation region.
In a specific example, the luminance compensation offset value c may be referred to as the DeMura offset value b, and an average value of DeMura offset values of a plurality of blocks included in each compensation region may be calculated and a value of the DeMura offset value may be used as the luminance compensation offset value, or after the average value of DeMura offset values of a plurality of blocks included in each compensation region is calculated, the average value is converted according to a set rule to obtain the luminance compensation offset value. Specifically, the offset value of each compensation area may be 8-bit data.
In this embodiment, DeMura compensation data is obtained from the DeMura circuit, luminance compensation data of each compensation region is calculated according to the DeMura compensation data, and luminance compensation is performed on each compensation region according to the luminance compensation data, so that DeMura compensation and compensation for the uneven luminance condition can be simultaneously realized without increasing the hardware cost of the electroluminescent display device, and time cost and economic cost are saved.
The embodiment of the invention also provides an electroluminescent display device which comprises the brightness compensation device.
An embodiment of the present invention further provides a luminance compensation apparatus, including: a memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the brightness compensation method as described above.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the brightness compensation method as described above.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described herein may be implemented with circuitry (e.g., procedures, functions, and so on) that performs the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, user equipment (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
It is further 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 user equipment 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 user equipment. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or user equipment that comprises the element.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A method of brightness compensation for use in an electroluminescent display device having a DeMura circuit, the method comprising:
acquiring DeMura data of the DeMura circuit, wherein the DeMura data comprises DeMura compensation data and/or original brightness data of each pixel in a display area of the electroluminescent display device;
dividing the display area into a plurality of compensation areas;
calculating brightness compensation data of each compensation area according to the DeMura data, and performing brightness compensation on each compensation area according to the brightness compensation data;
the brightness compensation data is calculated by using a brightness compensation deviant c, the brightness compensation deviant c takes the DeMura deviant b as a reference, the average value of the DeMura deviants of a plurality of blocks included in each compensation area is calculated, and the value of the DeMura deviant is taken as the brightness compensation deviant, or after the average value of the DeMura deviants of a plurality of blocks included in each compensation area is calculated, the average value is converted according to a set rule to obtain the brightness compensation deviant.
2. The method of claim 1, wherein when the DeMura data comprises original luminance data for each pixel of the display region, the calculating the luminance compensation data for each compensation region according to the DeMura data comprises:
calculating the average brightness data of each compensation area according to the original brightness data of each pixel;
and calculating the brightness compensation data of each compensation area according to the average brightness data.
3. The luminance compensation method according to claim 2, wherein the calculating the luminance compensation data for each compensation region according to the average luminance data comprises:
and calculating the brightness compensation data y of each compensation area by using the formula of y ═ ax + b + c, wherein x is the average brightness data, a is the compensation gain, b is the DeMura offset value, and c is the brightness compensation offset value.
4. The method of claim 1, wherein when the DeMura data comprises DeMura compensation data, the calculating the illumination compensation data for each compensation region according to the DeMura data comprises:
calculating average DeMura compensation data of each compensation area according to the DeMura compensation data corresponding to each compensation area;
and calculating the brightness compensation data of each compensation area according to the average DeMura compensation data.
5. The illumination compensation method of claim 4, wherein the calculating the illumination compensation data for each compensation region according to the average DeMura compensation data comprises:
and calculating the brightness compensation data y of each compensation area by using the formula of y-k + c, wherein k is the average DeMura compensation data, and c is a brightness compensation offset value.
6. The luminance compensation method according to claim 1, wherein the dividing the display area into a plurality of compensation areas comprises:
dividing the display area into a plurality of rectangular compensation areas arranged along a first direction, wherein the length of the compensation areas in a second direction is equal to the length of the display area in the second direction, the first direction is from a driving circuit close to the electroluminescent display device to a direction far away from the driving circuit, and the second direction is perpendicular to the first direction.
7. A luminance compensation apparatus, applied to an electroluminescent display device having a DeMura circuit, comprising:
an obtaining circuit, configured to obtain DeMura data of the DeMura circuit, where the DeMura data includes DeMura compensation data and/or original luminance data of each pixel in a display area of the electroluminescent display device;
a dividing circuit for dividing the display area into a plurality of compensation areas;
the processing circuit is used for calculating brightness compensation data of each compensation area according to the DeMura data and performing brightness compensation on each compensation area according to the brightness compensation data;
the brightness compensation data is calculated by using a brightness compensation deviant c, the brightness compensation deviant c takes the DeMura deviant b as a reference, the average value of the DeMura deviants of a plurality of blocks included in each compensation area is calculated, and the value of the DeMura deviant is taken as the brightness compensation deviant, or after the average value of the DeMura deviants of a plurality of blocks included in each compensation area is calculated, the average value is converted according to a set rule to obtain the brightness compensation deviant.
8. The apparatus of claim 7, wherein when the DeMura data comprises original luminance data for each pixel of the display region,
the processing circuit is specifically used for calculating the average brightness data of each compensation area according to the original brightness data of each pixel; and calculating the brightness compensation data of each compensation area according to the average brightness data.
9. The apparatus of claim 7, wherein when the DeMura data comprises DeMura compensation data,
the processing circuit is specifically configured to calculate average DeMura compensation data of each compensation region according to the DeMura compensation data corresponding to each compensation region; and calculating the brightness compensation data of each compensation area according to the average DeMura compensation data.
10. An electroluminescent display device, characterized in that it comprises a brightness compensation means as claimed in any one of claims 7 to 9.
11. An illumination compensation apparatus, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps in the brightness compensation method as claimed in any one of claims 1 to 6.
12. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the brightness compensation method according to any one of claims 1 to 6.
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| CN110310237B (en) * | 2019-06-06 | 2020-08-18 | 武汉精立电子技术有限公司 | Method and system for removing image moire, measuring brightness of display panel sub-pixel point and repairing Mura defect |
| CN111491070B (en) * | 2020-06-29 | 2020-10-23 | 武汉精立电子技术有限公司 | Display panel multi-view angle equalization Demura method and terminal equipment |
| CN111798797B (en) * | 2020-07-28 | 2022-05-13 | 合肥鑫晟光电科技有限公司 | Display control method and device, display device and medium |
| CN111968563B (en) * | 2020-09-08 | 2024-04-05 | 京东方科技集团股份有限公司 | Method, device and system for compensating brightness of display panel, display panel and medium |
| CN113284461B (en) * | 2021-05-31 | 2022-08-23 | 武汉华星光电半导体显示技术有限公司 | Optical compensation method of display panel and storage medium |
| CN114023282A (en) * | 2021-11-30 | 2022-02-08 | Tcl华星光电技术有限公司 | Display compensation method and display |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531175A (en) * | 2013-10-31 | 2014-01-22 | 广东威创视讯科技股份有限公司 | Method and system for adjusting brightness uniformity of screen of splicing display device |
| CN107516495A (en) * | 2017-08-31 | 2017-12-26 | 京东方科技集团股份有限公司 | Detection method and device, its compensation method and the display device of pixel charging compensation |
| CN108648722A (en) * | 2018-05-14 | 2018-10-12 | 京东方科技集团股份有限公司 | A kind of luminance compensation method and device |
| CN108877736A (en) * | 2018-05-31 | 2018-11-23 | 昆山国显光电有限公司 | Eliminate compensation method and the device of screen body brightness disproportionation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9202423B2 (en) * | 2013-09-03 | 2015-12-01 | Shenzhen China Star Optoelectronics Technology Co., Ltd | LCD device, driving method of LCD panel, and mura compensating method |
| CN105206239B (en) * | 2015-10-16 | 2018-03-30 | 深圳市华星光电技术有限公司 | Mura phenomenon compensation methodes |
| CN106297665B (en) * | 2016-10-31 | 2018-12-07 | 昆山国显光电有限公司 | A kind of system and method compensating the internal electric source pressure drop of AMOLED display panel |
-
2018
- 2018-12-10 CN CN201811502832.8A patent/CN109377935B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531175A (en) * | 2013-10-31 | 2014-01-22 | 广东威创视讯科技股份有限公司 | Method and system for adjusting brightness uniformity of screen of splicing display device |
| CN107516495A (en) * | 2017-08-31 | 2017-12-26 | 京东方科技集团股份有限公司 | Detection method and device, its compensation method and the display device of pixel charging compensation |
| CN108648722A (en) * | 2018-05-14 | 2018-10-12 | 京东方科技集团股份有限公司 | A kind of luminance compensation method and device |
| CN108877736A (en) * | 2018-05-31 | 2018-11-23 | 昆山国显光电有限公司 | Eliminate compensation method and the device of screen body brightness disproportionation |
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