CN113539155B - Method, apparatus, device and storage medium for brightness compensation - Google Patents
Method, apparatus, device and storage medium for brightness compensation Download PDFInfo
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- CN113539155B CN113539155B CN202010290177.5A CN202010290177A CN113539155B CN 113539155 B CN113539155 B CN 113539155B CN 202010290177 A CN202010290177 A CN 202010290177A CN 113539155 B CN113539155 B CN 113539155B
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- G—PHYSICS
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- 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
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The embodiment of the invention discloses a brightness compensation method, a device, equipment and a storage medium. The method comprises the following steps: determining target display brightness of a display screen to be compensated; obtaining a target compensation table of which the corresponding brightness range contains the target display brightness from a compensation database; and carrying out brightness compensation on the display screen to be compensated according to the target compensation table. According to the embodiment of the invention, when the display screen to be compensated is subjected to brightness compensation, the target compensation table of the display screen to be compensated is directly obtained from the compensation database, and the compensation table only applicable to the display screen to be compensated is constructed without detecting the electronic optical characteristics of the display screen to be compensated, so that the operation required for brightness compensation of the display screen can be simplified, and the brightness compensation efficiency of the display screen is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a method, an apparatus, a device, and a storage medium for brightness compensation.
Background
Due to the limitations of the process level, the purity of raw materials and other factors, the display screen is often uneven after production. In the prior art, when brightness compensation is performed on a display screen, the actual display brightness value of each pixel in the display screen and the electron optical characteristic of the display screen are measured, a compensation table of the display screen is generated, and the compensation table is adopted to perform brightness compensation on the display screen.
However, the existing brightness compensation method is only suitable for brightness compensation of a single display screen, and when the display screen changes, the compensation table of the changed display screen needs to be measured again, so that the brightness compensation process of the existing brightness compensation method is complicated, and the brightness compensation efficiency is low.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, apparatus, device and storage medium for brightness compensation, so as to simplify operations required for brightness compensation of a display screen and improve brightness compensation efficiency.
In a first aspect, an embodiment of the present invention provides a method for brightness compensation, including:
determining target display brightness of a display screen to be compensated;
obtaining a target compensation table of which the corresponding brightness range contains the target display brightness from a compensation database;
and carrying out brightness compensation on the display screen to be compensated according to the target compensation table.
In a second aspect, an embodiment of the present invention provides an apparatus for brightness compensation, including:
the target brightness determining module is used for determining target display brightness of the display screen to be compensated;
the compensation table acquisition module is used for acquiring a target compensation table of which the corresponding brightness range contains the target display brightness from a compensation database;
and the brightness compensation module is used for carrying out brightness compensation on the display screen to be compensated according to the target compensation table.
In a third aspect, an embodiment of the present invention provides an apparatus, including:
one or more processors;
a memory for storing one or more programs,
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the methods of luminance compensation as described in embodiments of the present invention.
In a fourth aspect, embodiments of the present invention also provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method for brightness compensation according to embodiments of the present invention.
In the technical scheme of display screen brightness compensation, the target display brightness of the display screen to be compensated is determined, a target compensation table with the corresponding brightness range containing the target display brightness is obtained from a compensation database, and the display screen to be compensated is subjected to brightness compensation based on the target compensation table. According to the embodiment of the invention, when the display screen to be compensated is subjected to brightness compensation, the target compensation table of the display screen to be compensated is directly obtained from the compensation database, and the compensation table only applicable to the display screen to be compensated is constructed without detecting the electronic optical characteristics of the display screen to be compensated, so that the operation required for brightness compensation of the display screen can be simplified, and the brightness compensation efficiency of the display screen is improved.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
fig. 1 is a flowchart of a method for brightness compensation according to a first embodiment of the present invention;
fig. 2 is a flowchart of a brightness compensation method according to a second embodiment of the invention;
FIG. 3 is a graph of brightness data according to a second embodiment of the present invention;
FIG. 4 is a graph showing another brightness data according to a second embodiment of the present invention;
FIG. 5 is a third luminance data curve according to the second embodiment of the present invention;
FIG. 6 is a fourth luminance data curve according to the second embodiment of the present invention;
fig. 7 is a block diagram of a brightness compensation device according to a third embodiment of the present invention;
fig. 8 is a schematic structural diagram of an apparatus according to a fourth embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the matters related to the present invention are shown in the accompanying drawings. In addition, embodiments of the invention and features of the embodiments may be combined with one another without conflict
Example 1
An embodiment of the invention provides a brightness compensation method. The method can be performed by a brightness compensation device, wherein the device can be implemented by software and/or hardware, and can be generally integrated in a device with a brightness compensation function, and is suitable for the situation of brightness compensation of a display screen. Fig. 1 is a flowchart of a brightness compensation method according to an embodiment of the invention. As shown in fig. 1, the method for brightness compensation provided in this embodiment includes:
s110, determining target display brightness of the display screen to be compensated.
In this step, the target display brightness of the display screen to be compensated may be understood as the ideal display brightness of the display screen to be compensated, that is, the brightness to be adjusted by the pixels with uneven brightness in the display screen to be compensated may be the maximum display brightness of the display screen to be compensated or the brightness to be displayed by the display screen to be compensated currently, and accordingly, the target display brightness of the display screen to be compensated may be determined based on the input operation of the staff, or may be obtained from the installation device of the display screen to be compensated. The display screen to be compensated is a display screen which is currently being subjected to brightness compensation; the installation equipment of the display screen to be compensated is equipment provided with the display screen to be compensated.
For example, when the target display brightness is the maximum brightness of the display screen to be compensated, the brightness compensation device can communicate with the installation device to obtain the model information of the display screen to be compensated, and obtain the maximum brightness of the display screen to be compensated according to the model information inquiry, or directly communicate with the installation device to obtain the maximum brightness of the display screen to be compensated; when the target display brightness is the brightness of the display screen to be compensated, the brightness compensation device can send a brightness acquisition request to the installation device to request the installation device to send the current display brightness of the display screen to be compensated, which is set by the user at the end of the installation device, to the brightness compensation device, and after receiving the current display brightness sent by the installation device, the brightness compensation device determines the current display brightness as the target display brightness of the display screen to be compensated.
In this embodiment, whether the display screen to be compensated has a defect of uneven brightness or not may be directly subjected to brightness compensation; the display screen to be compensated may be subjected to brightness compensation only when the display screen to be compensated has a defect of uneven brightness, that is, only when the display screen to be compensated has pixels with uneven brightness, which is not limited in this embodiment. The pixels with uneven brightness may be understood as pixels in the display screen to be compensated, where the actual display brightness is not the target display brightness of the display screen to be compensated.
In order to avoid unnecessary brightness compensation operation and further improve the efficiency of brightness compensation, the present embodiment preferably can perform brightness compensation only for a display screen having brightness unevenness defects. At this time, preferably, before the determining the target display brightness of the display screen to be compensated, the method may further include: and determining that uneven brightness pixels exist in the display screen to be compensated. The method for determining whether the non-uniform brightness pixels exist in the display screen to be compensated can be flexibly selected, if so, the actual display brightness of each pixel of the display screen to be compensated can be detected, whether the actual display brightness of each pixel is the target display brightness is judged, if so, the non-uniform brightness pixels exist in the display screen to be compensated, and if not, the non-uniform brightness pixels exist in the display screen to be compensated; the method can also collect the image of the display screen to be compensated, determine whether the gray values of all target pixels (or the brightness values of all color channels) in the imaging area of the display screen to be compensated in the image are the same, if so, determine that no non-uniform brightness pixels exist in the display screen to be compensated, if not, determine that non-uniform brightness pixels exist in the display screen to be compensated, and the like.
S120, obtaining a target compensation table with the corresponding brightness range containing the target display brightness from a compensation database.
Specifically, according to the determined target display brightness of the display screen to be compensated and the brightness ranges corresponding to the compensation tables stored in the compensation database, the brightness range containing the target display brightness in the brightness ranges corresponding to the compensation tables is determined as the target brightness range, and the compensation table corresponding to the target brightness range in the compensation database is determined as the target compensation table. When there are a plurality of compensation tables whose brightness ranges include the target display brightness, one of the plurality of compensation tables may be arbitrarily selected as the target compensation table; or selecting a compensation table with the nearest difference value between the median (or average value) of the brightness range and the target display brightness as a target compensation table, so as to further improve the accuracy of the brightness compensation result. The compensation table is recorded with compensation parameters of pixels with uneven brightness in the display screen under different display brightness conditions, the brightness range corresponding to the compensation table can be understood as a brightness range applicable to the compensation table when the display screen is subjected to brightness compensation, and each compensation table and the applicable brightness range can be correspondingly stored in a compensation database by staff in advance; at this time, before the determining the target display brightness of the display screen to be compensated, it may further preferably include: and constructing a compensation database.
In this embodiment, compensation data of a plurality of display screen samples with different target display brightness may be measured, compensation tables are generated according to the compensation data of each display screen sample, the brightness range applicable to each compensation table is determined, and each compensation table and the brightness range thereof are correspondingly stored in a compensation database, so as to complete the construction of the compensation database. The method for determining the brightness range applicable to each compensation table can be selected according to the need, for example, the target display brightness of the display screen sample corresponding to the compensation table can be respectively increased and decreased by a set proportion (or a set numerical value) to obtain the brightness compensation range applicable to the compensation table; and the compensation table can also be used for carrying out brightness compensation on the display screen sample, the target display brightness of which is close to the display screen sample corresponding to the compensation table (if the difference value of the target display brightness and the display screen sample is within a preset range), and the brightness compensation range suitable for the compensation table is determined according to the brightness compensation result so as to improve the accuracy of the determined brightness range, thereby further improving the accuracy of the display screen brightness compensation result to be compensated.
When determining the brightness range for which the compensation table is applicable based on the brightness compensation result of the display screen sample, constructing the compensation database may be achieved by: measuring compensation data of a plurality of first display screen samples with different target display brightness, and generating a compensation table corresponding to each target display brightness according to the compensation data; respectively adopting each compensation table to carry out brightness compensation on a plurality of second display screen samples with different target display brightness; and determining a brightness range applicable to each compensation table according to the brightness compensation result of the second display screen sample, and storing the compensation table and the brightness range in a compensation database correspondingly.
Illustratively, the construction process of the compensation database may be: respectively preparing display screens with target display brightness of A nit, A+n nit and A+2n nit … A+mn nit as first display screen samples; for each first display screen sample, firstly, measuring the electron optical characteristics of the first display screen sample, such as measuring the actual display brightness of pixels in the first display screen sample under different driving currents, obtaining the compensation data of the first display screen sample, and generating a compensation table of the first display screen sample based on the compensation data; then, selecting a plurality of display screens with target display brightness close to that of the first display screen sample (within +/-x% of the target display brightness of the first display screen sample) as second display screen samples, respectively adopting the compensation table to carry out brightness compensation on each second display screen sample, and if the number of brightness uneven pixels in the second display screen sample after brightness compensation is smaller than or equal to a set threshold value, determining that the brightness compensation of the second display screen sample is successful; thirdly, determining the maximum brightness range of the target display brightness of the second display screen sample, which is formed by the target display brightness of the second display screen sample with successful brightness compensation and has a boundary value of two brightness compensation success, as the brightness range applicable to the compensation table, or determining the maximum brightness range of the second display screen sample, which is formed by the target display brightness of the second display screen sample with successful brightness compensation and has a boundary value of two brightness compensation success and has a target display brightness between the two boundary values, as the brightness range applicable to the compensation table; and finally, storing the compensation table corresponding to the applicable brightness range in a compensation database.
It will be appreciated that when a new target display luminance exists, a compensation table whose luminance range includes the new target display luminance may be generated, and the generated compensation table and the luminance range corresponding thereto may be stored in the compensation database, so as to implement updating of the compensation database and improve the comprehensiveness of the compensation table stored in the compensation database. Specifically, when the brightness ranges corresponding to the compensation tables in the compensation database do not include the target display brightness of the display screen to be compensated, compensation data of the display screen to be compensated can be measured, a target compensation table corresponding to the target display brightness of the display screen to be compensated is generated according to the compensation data, the display screen to be compensated is subjected to brightness compensation according to the target compensation table, and when the display screen to be compensated is subjected to brightness compensation, or after the display screen to be compensated is subjected to brightness compensation, a second display screen sample with the target display brightness close to the target display brightness of the display screen to be compensated is subjected to brightness compensation according to the compensation table, the brightness range applicable to the compensation table is determined according to the compensation result, and the compensation table is stored in the compensation database in a corresponding manner to the brightness range.
S130, carrying out brightness compensation on the display screen to be compensated according to the target compensation table.
Specifically, based on the actual display brightness of each brightness non-uniform pixel in the display screen to be compensated, a target compensation table is queried, compensation parameters of each brightness non-uniform pixel are determined, and the compensation parameters of each brightness non-uniform pixel are adopted to carry out brightness compensation on each brightness non-uniform pixel, so that the brightness compensation of the display screen to be compensated is realized.
It can be understood that, in this embodiment, after brightness compensation is performed on the display screen to be compensated according to the target compensation table, it is determined that brightness compensation of the display screen to be compensated is completed, and the operation is finished; and the method can also re-detect whether the number of the uneven brightness pixels in the display screen to be compensated is smaller than or equal to a set threshold value, determine that the brightness compensation of the display screen to be compensated is completed when detecting that the number of the uneven brightness pixels in the display screen to be compensated is smaller than or equal to the set threshold value, and return to execute S120 or S130 when determining that the number of the uneven brightness pixels in the display screen to be compensated is larger than the set threshold value so as to re-perform the brightness compensation on the display screen to be compensated, thereby further improving the brightness compensation effect of the display screen to be compensated.
According to the brightness compensation method, target display brightness of the display screen to be compensated is determined, a target compensation table with the corresponding brightness range containing the target display brightness is obtained from a compensation database, and brightness compensation is performed on the display screen to be compensated based on the target compensation table. According to the embodiment, when the display screen to be compensated is subjected to brightness compensation, the target compensation table of the display screen to be compensated is directly obtained from the compensation database, and the compensation table only applicable to the display screen to be compensated is constructed without detecting the electronic optical characteristics of the display screen to be compensated, so that the operation required for brightness compensation of the display screen can be simplified, and the brightness compensation efficiency of the display screen is improved.
Example two
Fig. 2 is a flowchart of a brightness compensation method according to a second embodiment of the present invention. Based on the above embodiments, the present embodiment optimizes "performing brightness compensation on the display screen to be compensated according to the target compensation table" as: inquiring the target compensation table according to the actual display brightness of each brightness non-uniform pixel to obtain compensation data corresponding to each brightness non-uniform pixel; and adjusting the driving current of the corresponding uneven-brightness pixel according to the compensation data so as to adjust the brightness of the uneven-brightness pixel to the target display brightness. And optimizing "determining that the luminance non-uniformity pixel exists in the display screen to be compensated" as: collecting an image of a display screen to be compensated in a light-emitting state, and identifying an imaging area of the display screen to be compensated in the image; and if the gray values of the target pixels in the imaging area are different, determining that the pixels with uneven brightness exist in the display screen to be compensated.
Further, after the determining that the display screen to be compensated has the pixels with uneven brightness, the method further includes: and determining the uneven brightness pixels in the display screen to be compensated and the actual display brightness of the uneven brightness pixels according to the gray scale value of each target pixel in the imaging area.
Accordingly, as shown in fig. 2, the method for brightness compensation provided in this embodiment includes:
s210, acquiring an image of the display screen to be compensated in a light emitting state, and identifying an imaging area of the display screen to be compensated in the image.
In this embodiment, whether the display screen to be compensated has the pixels with uneven brightness may be determined according to the image of the display screen to be compensated. Specifically, when the display screen to be compensated is in a light-emitting state, an image of the display screen to be compensated is acquired, and an imaging area of the display screen to be compensated in the acquired image is identified based on the image characteristics of the display screen to be compensated. The imaging area can be understood as the area where the image formed by the display screen to be compensated is located in the image acquired by the brightness compensation device. The display screen may be in a light-emitting state in which the display screen emits light only but does not display any screen, or in a state in which the display screen emits light and displays a screen having only a single color. The present embodiment can preferably set the light emitting state of the display screen to a state where only light is emitted and no picture is displayed, thereby further simplifying the control process of the display screen to be compensated.
It can be understood that the light emitting state of the display screen to be compensated can be controlled by the brightness compensation device or other devices, for example, the brightness compensation device sends a state adjustment instruction to the installation device of the display screen to be compensated, and the installation device of the display screen to be compensated is instructed to adjust the display screen to be compensated to the light emitting state through the state adjustment instruction; or, the installation device of the display screen to be compensated adjusts the display screen to be compensated into a light-emitting state based on the state adjustment instruction generated by the triggering of the staff, and sends the state information of the installation device to the brightness compensation device, so that the brightness compensation device determines that the display screen to be compensated is in the light-emitting state after receiving the state information sent by the installation device, and acquires the image of the display screen to be compensated.
S220, if the gray values of the target pixels in the imaging area are different, determining that the pixels with uneven brightness exist in the display screen to be compensated.
Correspondingly, if the gray values of all target pixels in the imaging area are the same, determining that the pixels with uneven brightness do not exist in the display screen to be compensated; or if the gray values of the target pixels in the imaging area are the same, determining the actual display brightness of each pixel in the display screen to be compensated according to the gray values of the target pixels, judging whether the actual display brightness is equal to the target display brightness of the display screen to be compensated, if so, determining that the display screen to be compensated does not have uneven brightness pixels, if not, determining that the display screen to be compensated has uneven brightness pixels, and further improving the accuracy of the determination result of the uneven brightness pixels of the display screen to be compensated, and further improving the brightness compensation effect of the display screen to be compensated.
The target pixel is understood to be a pixel in the imaging region of the display screen to be compensated. The actual brightness of each pixel in the display screen to be compensated may be obtained by querying a brightness data curve corresponding to the target display brightness of the display screen to be compensated according to the gray value of each target pixel, for example, the brightness data curve corresponding to each target display brightness is measured in advance, as shown in fig. 3-6, and fig. 3-6 respectively show the brightness data curves when the target brightness is 300nit, 350nit, 400nit, 450nit, so that when the actual brightness of each pixel in the display screen to be compensated is determined, the brightness data curve of the display screen to be compensated may be determined based on the target display brightness of the display screen to be compensated first, and then the brightness data curve is queried according to the gray value of each target pixel, so as to obtain the actual display brightness of each pixel in the display screen to be compensated.
S230, determining uneven brightness pixels in the display screen to be compensated and actual display brightness of the uneven brightness pixels according to gray values of target pixels in the imaging area.
Specifically, the pixel corresponding to each target pixel in the display screen to be compensated can be determined according to the number of rows and columns of the target pixels in the imaging area and the resolution of the display screen to be compensated; according to the gray value of each target pixel in the imaging area, inquiring a brightness data curve corresponding to the target display brightness of the display screen to be compensated, obtaining the actual display brightness of the pixels corresponding to each target pixel in the display screen to be compensated, and determining the pixels in the display screen to be compensated, the actual display brightness of which is not the target display brightness of the display screen to be compensated, as the pixels with uneven brightness.
S240, determining target display brightness of the display screen to be compensated.
S250, obtaining a target compensation table with the corresponding brightness range containing the target display brightness from a compensation database.
S260, inquiring the target compensation table according to the actual display brightness of each non-uniform brightness pixel to obtain compensation data corresponding to each non-uniform brightness pixel.
In this embodiment, the compensation data in the compensation table may be set to correspond to the actual display luminance of the luminance non-uniformity pixel, or to correspond to the difference between the target display luminance of the display screen to be compensated and the actual display luminance of the luminance non-uniformity pixel, as required. Correspondingly, when the compensation data in the compensation table corresponds to the actual display brightness of the pixels with uneven brightness, the target compensation table can be directly inquired according to the actual display brightness of each pixel with uneven brightness, so as to obtain the compensation data of each pixel with uneven brightness; when the compensation data in the compensation table corresponds to the difference value between the target display brightness of the display screen to be compensated and the actual display brightness of the non-uniform brightness pixels, the difference value between the target display brightness of the display screen to be compensated and the actual display brightness of each non-uniform brightness pixel can be calculated first to be used as the target difference value corresponding to each non-uniform brightness pixel, and then the target compensation table is queried according to the target difference value of each non-uniform brightness pixel to obtain the compensation data of each non-uniform brightness pixel. The compensation data may be an analog quantity representing the magnitude of the compensation current for adjusting the pixels with uneven brightness of the display screen, and may correspond to the current output of each pixel of the display screen, so that after the original data (i.e., the original analog quantity) of the pixels with uneven brightness are adjusted by using the compensation data, the driving current of the pixels with uneven brightness will also change accordingly, thereby achieving the purpose of adjusting the actual display brightness of the pixels with uneven brightness.
S270, driving current of the pixels with uneven brightness is adjusted according to the compensation data, so that the brightness of the pixels with uneven brightness is adjusted to the target display brightness.
In this embodiment, the driving current output by the driving circuit of the uneven brightness pixel can be adjusted for each uneven brightness pixel by the compensation data of the uneven brightness pixel, so as to achieve the purpose of adjusting the actual display brightness of the uneven brightness pixel. When adjusting the driving current of the uneven brightness pixels, the compensation data of the uneven brightness pixels may be superimposed on the original data of the uneven brightness pixels according to the meaning of the compensation data in the compensation table, or the original data of the uneven brightness pixels may be adjusted to the compensation data of the uneven brightness pixels. Specifically, when the compensation data in the compensation table is the difference value between the target data to be compensated and the original data of the uneven brightness pixel, the compensation data of the uneven brightness pixel can be superimposed on the original data of the uneven brightness pixel, that is, the sum of the original data of the uneven brightness pixel and the data of the compensation data is calculated, so that the driving current of the uneven brightness pixel is adjusted to a current corresponding to the sum of the calculated data; when the compensation data in the compensation table is the target data to be compensated, the original data of the non-uniform brightness pixels can be directly adjusted to the compensation data of the non-uniform brightness pixels, so that the driving current of the non-uniform brightness pixels can be adjusted to the current corresponding to the compensation data.
According to the brightness compensation method provided by the embodiment of the invention, an image of a display screen to be compensated in a light emitting state is collected, if gray values of target pixels in an imaging area of the display screen to be compensated in the image are different, the presence of the brightness non-uniform pixels in the display screen to be compensated is determined, the brightness non-uniform pixels in the display screen to be compensated and the actual display brightness of the brightness non-uniform pixels are determined according to the gray values of the target pixels, a target compensation table corresponding to the target display zero degree of the display screen to be compensated is queried according to the actual display brightness of the brightness non-uniform pixels, compensation data of the brightness non-uniform pixels are obtained, and driving currents of the corresponding brightness non-uniform pixels are adjusted based on the determined compensation data, so that the brightness of the brightness pixels is adjusted to be the target display brightness of the display screen to be compensated. By adopting the technical scheme, the brightness compensation effect of the display screen can be further improved on the premise of realizing the brightness compensation of the display screen to be compensated, unnecessary compensation operation is avoided, and the time consumed by the brightness compensation of the display screen is saved.
Example III
The third embodiment of the invention provides a brightness compensation device. The device can be realized by software and/or hardware, can be integrated in equipment with brightness compensation function, and can perform brightness compensation on the display screen by executing brightness compensation method. Fig. 7 is a block diagram of a brightness compensation device according to a third embodiment of the present invention. As shown in fig. 7, the apparatus for brightness compensation provided in this embodiment includes a target brightness determination module 301, a compensation table acquisition module 302, and a brightness compensation module 303, wherein,
a target brightness determining module 301, configured to determine a target display brightness of a display screen to be compensated;
the compensation table obtaining module 302 is configured to obtain a target compensation table, where the corresponding brightness range includes the target display brightness, from a compensation database;
and the brightness compensation module 303 is configured to perform brightness compensation on the display screen to be compensated according to the target compensation table.
In the brightness compensation device provided by the third embodiment of the invention, the target brightness of the display screen to be compensated is determined by the target brightness determining module, the target compensation table with the corresponding brightness range containing the target display brightness is obtained from the compensation database by the compensation table obtaining module, and the brightness compensation is performed on the display screen to be compensated based on the target compensation table by the brightness compensation module. According to the embodiment, when the display screen to be compensated is subjected to brightness compensation, the target compensation table of the display screen to be compensated is directly obtained from the compensation database, and the compensation table only applicable to the display screen to be compensated is constructed without detecting the electronic optical characteristics of the display screen to be compensated, so that the operation required for brightness compensation of the display screen can be simplified, and the brightness compensation efficiency of the display screen is improved.
In the above aspect, the brightness compensation module 303 may include: the current query unit is used for querying the target compensation table according to the actual display brightness of each brightness non-uniform pixel to obtain compensation data corresponding to each brightness non-uniform pixel; and the current adjusting unit is used for adjusting the driving current of the corresponding uneven-brightness pixel according to the compensation data so as to adjust the brightness of the uneven-brightness pixel to the target display brightness.
Further, the apparatus for brightness compensation provided in this embodiment may further include: and the pixel determining module is used for determining that pixels with uneven brightness exist in the display screen to be compensated before the target display brightness of the display screen to be compensated is determined.
In the above aspect, the pixel determining module may include: the area identification unit is used for acquiring an image of the display screen to be compensated in a light-emitting state and identifying an imaging area of the display screen to be compensated in the image; and the pixel determining unit is used for determining that the pixels with uneven brightness exist in the display screen to be compensated when the gray values of the target pixels in the imaging area are different.
Further, the apparatus for brightness compensation provided in this embodiment may further include: and the actual brightness determining module is used for determining the brightness non-uniform pixels in the display screen to be compensated and the actual display brightness of the brightness non-uniform pixels according to the gray values of all the target pixels in the imaging area after the brightness non-uniform pixels in the display screen to be compensated are determined.
Further, the apparatus for brightness compensation provided in this embodiment may further include: and the database component module is used for constructing a compensation database before the target display brightness of the display screen to be compensated is determined.
In the above aspect, the database component module may include: the compensation table generation unit is used for measuring compensation data of a plurality of first display screen samples with different target display brightness and generating a compensation table corresponding to each target display brightness according to the compensation data; the compensation unit is used for carrying out brightness compensation on a plurality of second display screen samples with different target display brightness by adopting the compensation tables respectively; and the range determining unit is used for determining the applicable brightness range of each compensation table according to the brightness compensation result of the second display screen sample, and storing the compensation table and the brightness range in a compensation database correspondingly.
The brightness compensation device provided by the third embodiment of the invention can execute the brightness compensation method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of executing the brightness compensation method. Technical details not described in detail in this embodiment may be referred to the method of brightness compensation provided in any embodiment of the present invention.
Example IV
Fig. 8 is a schematic structural diagram of an apparatus according to a fourth embodiment of the present invention, where, as shown in fig. 8, the apparatus includes a processor 40 and a memory 41, and may further include an input device 42 and an output device 43; the number of processors 40 in the device may be one or more, one processor 40 being taken as an example in fig. 8; the processor 40, the memory 41, the input means 42 and the output means 43 in the device may be connected by a bus or other means, in fig. 8 by way of example.
The memory 41 is a computer-readable storage medium that can be used to store a software program, a computer-executable program, and modules, such as program instructions/modules corresponding to the method of luminance compensation in the embodiment of the present invention (e.g., the target luminance determination module 301, the compensation table acquisition module 302, and the luminance compensation module 303 in the apparatus for luminance compensation). The processor 40 performs various functional applications of the device and data processing, i.e. the method of achieving brightness compensation described above, by running software programs, instructions and modules stored in the memory 41.
The memory 41 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for functions; the storage data area may store data created according to the use of the terminal, etc. In addition, memory 41 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, memory 41 may further include memory located remotely from processor 40, which may be connected to the device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input means 42 may be used to receive entered numeric or character information and to generate key signal inputs related to user settings and function control of the device. The output means 43 may comprise a display device such as a display screen.
A fourth embodiment of the present invention also provides a storage medium containing computer-executable instructions, which when executed by a computer processor, are for performing a method of brightness compensation, the method comprising:
determining target display brightness of a display screen to be compensated;
obtaining a target compensation table of which the corresponding brightness range contains the target display brightness from a compensation database;
and carrying out brightness compensation on the display screen to be compensated according to the target compensation table.
Of course, the storage medium containing the computer executable instructions provided in the embodiments of the present invention is not limited to the above-described method operations, and may also perform the related operations in the brightness compensation method provided in any embodiment of the present invention.
From the above description of embodiments, it will be clear to a person skilled in the art that the present invention may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, etc., and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments of the present invention.
It should be noted that, in the embodiment of the apparatus for brightness compensation, each unit and module included are only divided according to the functional logic, but not limited to the above-mentioned division, so long as the corresponding functions can be implemented; in addition, the specific names of the functional units are also only for distinguishing from each other, and are not used to limit the protection scope of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (9)
1. A method of brightness compensation, comprising:
determining target display brightness of a display screen to be compensated;
obtaining a target compensation table of which the corresponding brightness range contains the target display brightness from a compensation database;
performing brightness compensation on the display screen to be compensated according to the target compensation table;
before the target display brightness of the display screen to be compensated is determined, the method further comprises the following steps:
constructing a compensation database;
the building of the compensation database comprises:
measuring compensation data of a plurality of first display screen samples with different target display brightness, and generating a compensation table corresponding to each target display brightness according to the compensation data;
respectively adopting each compensation table to carry out brightness compensation on a plurality of second display screen samples with different target display brightness;
and determining a brightness range applicable to each compensation table according to the brightness compensation result of the second display screen sample, and storing the compensation table and the brightness range in a compensation database correspondingly.
2. The method according to claim 1, wherein the performing brightness compensation on the display screen to be compensated according to the target compensation table includes:
inquiring the target compensation table according to the actual display brightness of each brightness non-uniform pixel to obtain compensation data corresponding to each brightness non-uniform pixel;
and adjusting the driving current of the corresponding uneven-brightness pixel according to the compensation data so as to adjust the brightness of the uneven-brightness pixel to the target display brightness.
3. The method of claim 1, further comprising, prior to said determining the target display brightness of the display screen to be compensated:
and determining that uneven brightness pixels exist in the display screen to be compensated.
4. The method of claim 1, wherein obtaining a target compensation table in the self-compensation database for a corresponding luminance range that includes the target display luminance, comprising:
when a plurality of compensation tables with brightness ranges containing the target display brightness exist, arbitrarily selecting one from the plurality of compensation tables as a target compensation table; or selecting a compensation table with the median or average value in the brightness range closest to the difference value of the target display brightness as a target compensation table.
5. The method of claim 2, wherein determining that there are non-uniform brightness pixels in the display screen to be compensated comprises:
collecting an image of a display screen to be compensated in a light-emitting state, and identifying an imaging area of the display screen to be compensated in the image;
and if the gray values of the target pixels in the imaging area are different, determining that the pixels with uneven brightness exist in the display screen to be compensated.
6. The method of claim 5, further comprising, after said determining that there are non-uniform brightness pixels in the display screen to be compensated:
and determining the uneven brightness pixels in the display screen to be compensated and the actual display brightness of the uneven brightness pixels according to the gray scale value of each target pixel in the imaging area.
7. An apparatus for brightness compensation, comprising:
the target brightness determining module is used for determining target display brightness of the display screen to be compensated;
the compensation table acquisition module is used for acquiring a target compensation table of which the corresponding brightness range contains the target display brightness from a compensation database;
the brightness compensation module is used for carrying out brightness compensation on the display screen to be compensated according to the target compensation table;
the database component module is used for constructing a compensation database before the target display brightness of the display screen to be compensated is determined;
the database component module includes:
the compensation table generation unit is used for measuring compensation data of a plurality of first display screen samples with different target display brightness and generating a compensation table corresponding to each target display brightness according to the compensation data;
the compensation unit is used for carrying out brightness compensation on a plurality of second display screen samples with different target display brightness by adopting the compensation tables respectively;
and the range determining unit is used for determining the applicable brightness range of each compensation table according to the brightness compensation result of the second display screen sample, and storing the compensation table and the brightness range in a compensation database correspondingly.
8. An apparatus, comprising:
one or more processors;
a memory for storing one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the method of luminance compensation as recited in any one of claims 1-6.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements a method of brightness compensation according to any one of claims 1-6.
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