CN111787331A - Display data compression method, compression device and display device - Google Patents
Display data compression method, compression device and display device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
- H04N19/91—Entropy coding, e.g. variable length coding [VLC] or arithmetic coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
- H04N19/93—Run-length coding
Abstract
The invention discloses a display data compression method, a compression device and a display device. The method comprises the following steps: acquiring N display data groups corresponding to N display modes one by one, wherein N is not less than 2 and is an integer; taking one display data group in the N display data groups as a reference display data group, and performing preset operation on data of at least one display data group in the rest N-1 display data groups and the data of the reference display data group to obtain at least one operation value display data group; wherein at least some of the data in the calculated value display data set is smaller than the data in the corresponding baseline display data set; and compressing the operation value display data set in a preset mode to obtain a compressed data set. The invention can reduce the data volume of the display data.
Description
Technical Field
The present invention relates to data compression technologies, and in particular, to a display data compression method, a display data compression apparatus, and a display apparatus.
Background
With the development of display technology, display panels, such as OLED (Organic Light Emitting Diode) display panels, are increasingly widely used.
The mura (uneven display) phenomenon easily appears when OLED display panel uses, influences display effect, and current OLED display panel utilizes display data to compensate OLED display panel, and the data bulk of display data is great, needs great memory space however.
Disclosure of Invention
The invention provides a display data compression method, a compression device and a display device, which are used for compressing display data and reducing the data volume.
In a first aspect, an embodiment of the present invention provides a method for compressing display data, where the method includes: acquiring N display data groups corresponding to N display modes one by one, wherein N is not less than 2 and is an integer; taking one display data group in the N display data groups as a reference display data group, and performing preset operation on data of at least one display data group in the rest N-1 display data groups and data of the reference display data group to obtain at least one operation value display data group; wherein at least some of the data in the calculated value display data set is smaller than the data in the corresponding baseline display data set; and compressing the operation value display data set in a preset mode to obtain a compressed data set.
Optionally, the step of taking one display data set of the N display data sets as reference display data, and subtracting data of at least one display data set of the remaining N-1 display data sets from data of the reference display data set to obtain at least one group of operation value display data sets includes: respectively subtracting the data of the rest N-1 display data groups from the data of the reference display data group to obtain N-1 operation value display data groups; the compressing the display data set in a preset manner to obtain a compressed data set includes: and after the N-1 display data groups are combined, compressing the combined compressed data groups in the preset mode to obtain a combined compressed data group, wherein N is more than or equal to 3.
Optionally, the performing a preset operation on the data of at least one display data set of the remaining N-1 display data sets and the data of the reference display data set to obtain at least one operation value display data set by using one display data set of the N display data sets as reference display data includes: respectively subtracting the data of the rest N-1 display data groups from the data of the reference display data group to obtain N-1 operation value display data groups; the compressing the operation value display data set in a preset manner to obtain a compressed data set comprises: and combining the N-1 operation value display data groups into at least two operation value display data group sets, wherein each operation value display data group set comprises at least two operation value display data groups, and compressing the at least two operation value display data group sets respectively in the preset mode after merging respectively to obtain at least two merged compressed data groups, wherein N is more than or equal to 5.
Optionally, the data size of the merged compressed data set is the same as the data size of the reference display data set.
Optionally, the display mode corresponding to the reference display data set corresponds to a reference display mode of the display panel.
Optionally, the preset manner includes: huffman coding, arithmetic coding, run length coding, or dictionary coding.
Optionally, the reference display data set is not compressed.
In a second aspect, an embodiment of the present invention further provides a compression apparatus for display data, where the compression apparatus includes: the acquisition module is used for acquiring N display data groups which correspond to the N display modes one by one, wherein N is more than or equal to 2 and is an integer; the operation module is used for taking one display data group in the N display data groups as a reference display data group, and performing preset operation on data of at least one display data group in the rest N-1 display data groups and data of the reference display data group to obtain at least one operation value display data group; wherein at least some of the data in the calculated value display data set is smaller than the data in the corresponding baseline display data set; and the compression module is used for compressing the operation value display data set in a preset mode to obtain a compressed data set.
In a third aspect, an embodiment of the present invention further provides a display device, where the display device includes a display panel and a display driver, and the display driver is configured to store the compressed data set and the reference display data set obtained by the method in the first aspect, and drive the display panel to emit light for display according to the compressed data set and the reference display data set.
Optionally, the display driver includes an external memory and a timing controller; the time sequence controller comprises an internal memory, a decompression unit and a control processing unit, wherein the internal memory is used for receiving and storing the compressed data set and the reference display data set stored by the external memory; the decompression unit is used for decompressing the compressed data group to obtain an original display data group; the control processing unit is used for generating a display driving signal according to the input image data and the reference display data set or generating a display driving signal according to the input image data and the original display data set; the display panel displays an image according to the display driving signal.
According to the technical scheme of the embodiment of the invention, the adopted display data compression method comprises the steps of obtaining N display data groups which correspond to N display modes one by one, wherein N is more than or equal to 2, and N is an integer; taking one display data group of the N display data groups as reference display data, and performing preset operation on data of at least one display data group of the rest N-1 display data groups and data of the reference display data group to obtain at least one group of operation value display data groups, wherein at least part of data in the operation value display data groups is smaller than data in the corresponding reference display data groups; and compressing the operation value display data set by adopting a preset mode to obtain a compressed data set. The calculation value display data set is obtained by utilizing preset calculation with the reference display data set, the compensation data value in the calculation value display data set is small, the number of bits required by each data storage is small, meanwhile, the calculation value display data set is compressed, on one hand, the compression rate can be further improved, the data size is reduced, on the other hand, because the calculation value display data set is obtained by calculation of the reference display data set, the relevance between the compressed data set and the reference display data set can be improved, and the compression distortion rate is low.
Drawings
FIG. 1 is a flowchart of a method for compressing display data according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a data compression process according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a display data compression apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background art, the display data amount of the conventional OLED display panel is large, the inventors have found through careful research that the reason for this technical problem is: the conventional display panel can correspond to a plurality of display modes, when the display mode of the display panel is changed, the gamma of the driving chip also needs to be switched, and when the gamma is switched, because the display data is set corresponding to the gamma, each display mode of the display panel corresponds to one display data group, so that the display data amount corresponding to the display panel is large, and a large storage space is needed for storing the display data.
Based on the technical problem, the invention provides the following solution:
fig. 1 is a flowchart of a display data compression method according to an embodiment of the present invention, and referring to fig. 1, the display data compression method includes:
s101, acquiring N display data groups corresponding to N display modes one by one, wherein N is more than or equal to 2 and is an integer;
specifically, the display panel can respectively display in N display modes when displaying, for example, the display panel can respectively display in N refresh rates to adapt to different application scenarios, for example, the refresh rate required for reading is low, and the refresh rate required for watching video or playing games is high, where the refresh rate represents how many frames of pictures the display panel displays in one second, and for example, the refresh rate of 60Hz represents that the display panel displays 60 frames of pictures in 1 second; each display mode corresponds to one display data group, wherein the display data may be obtained through an algorithm, for example, the display data may be Demura compensation data, the compensation algorithm is well known to those skilled in the art and is not described herein, typically, a display picture of the display panel in a certain display mode is obtained through an optical device, a region where mura is generated in the display panel is obtained according to the display picture, then, the display data corresponding to sub-pixels in the display mode is calculated through the compensation algorithm, and a set of the display data corresponding to each sub-pixel is a display data group, so as to obtain N display data groups. In this embodiment, the display data set is a known quantity, and can be directly obtained when compressed, for example, the display data set is fetched from the memory.
Step S102, taking one display data group in the N display data groups as reference display data, and performing preset operation on data of at least one display data group in the rest N-1 display data groups and data of the reference display data group to obtain at least one group of operation value display data groups; wherein at least part of the data in the operation value display data group is smaller than the data in the corresponding reference display data group;
specifically, each display data group includes a plurality of display data, for example, the display data is Demura compensation data, where each sub-pixel in the display panel corresponds to one Demura compensation data, the display panel has how many sub-pixels, and how many Demura compensation data exist in one display data group, in other embodiments, the number of data in each display data group may be less than the number of sub-pixels, for example, one compensation data is shared by a plurality of sub-pixels; the number of data included in each display data set is the same, one display data set is selected from the N display data sets as a reference display data set, and the data of at least one display data set in the remaining N-1 sets and the data of the reference display data set are subjected to a preset operation to make at least part of the data in the operation value display data set smaller than the data in the corresponding reference display data set, wherein the preset operation may be, for example, a difference, for example, the data of at least one display data set in the remaining N-1 display data sets is correspondingly subtracted from the data of the reference display data set, and the meaning of the corresponding difference is the difference of the display data corresponding to the same sub-pixel, and the difference may be, for example, the data of at least one display data set in the remaining N-1 display data sets is subtracted from the data of the reference display data set, or the data of the reference display data set is subtracted from the data of the remaining N-1 display data sets Data of at least one display data set; because the difference of the corresponding display data of the same sub-pixel in different display modes is small, the difference between the display data and the same sub-pixel can make the operation value small, for example, the data of the reference display data group before the difference and the data of at least one display data group in the rest N-1 display data groups are 0xFFFF and 0xFFFE respectively, the operation value after the difference is 1, at this time, two values of 0xFFFF and 1 can be stored, compared with the storage of two values of 0xFFFF and 0xFFFE, the stored value is reduced, the required number of bits (bits) is also small, and thus the data amount is greatly reduced. It is understood that the preset operation may also be other operations, such as corresponding addition, specifically, data in at least one display data set of the remaining N-1 display data sets may be added to the data in the reference display data set correspondingly, and then divided by the data in the reference display data set, so as to obtain data serving as corresponding data in the operation value display data set. The data of at least one display data set in the rest N-1 display data sets and the data of the reference display data set are subjected to preset operation, and the preset operation can be performed on the data of part or all of the N-1 display data sets and the data of the reference display data set.
And step S103, compressing the operation value display data set by adopting a preset mode to obtain a compressed data set.
Specifically, after step S102, although the data size is smaller, the number of data is still large, and the operation value display data set can be compressed in a predetermined manner to obtain a compressed data set.
It should be noted that, when there are only two display data sets, one of the display data sets may be used as a reference display data set, data of the other display data set is subjected to a preset operation with data of the reference display data set, the obtained operation value display data set is compressed to obtain a compressed data set, and the reference display data set and the compressed display data set may be stored in a storage module corresponding to the display panel during storage.
When the number of the display data sets is more than or equal to three, namely N is more than or equal to 3, one of the display data sets can be used as a reference display data set, at least one of the rest N-1 display data sets is subjected to preset operation, and the display data sets which are not subjected to the preset operation can be compressed or not compressed in a preset mode. Accordingly, the data stored at the time of storage includes the reference display data set, the compressed display data set, and the data set in which the remaining display data sets are compressed or the remaining display data sets.
According to the technical scheme of the embodiment, the adopted display data compression method comprises the steps of obtaining N display data groups which correspond to N display modes one by one, wherein N is not less than 2 and is an integer; taking one display data group in the N display data groups as reference display data, and subtracting the data of at least one display data group in the rest N-1 display data groups from the data of the reference display data group to obtain at least one group of operation value display data groups; and compressing the operation value display data set by adopting a preset mode to obtain a compressed data set. The calculation value display data set is obtained by utilizing preset calculation with the reference display data set, the compensation data value in the calculation value display data set is small, the number of bits required by storage of each compensation data is small, meanwhile, the calculation value display data set is compressed, on one hand, the compression rate can be further improved, the size of data volume is reduced, the capacity of a required storage is small, the cost is low, on the other hand, because the calculation value display data set is obtained by calculation of the reference display data set, the relevance between the compressed data set and the reference display data set can be improved, and the compression distortion rate is low.
The operation value display data set is compressed in a preset mode to obtain a compressed data set, or the operation value display data set is combined and then compressed in a preset mode to obtain a combined compressed data set, wherein the combined operation value display data set comprises at least two operation value display data sets.
Optionally, taking one display data group of the N display data sets as reference display data, and subtracting data of at least one display data group of the remaining N-1 display data sets from data of the reference display data group to obtain at least one group of operation value display data groups includes:
performing preset operation on the data of the rest N-1 display data groups and the data of the reference display data group respectively to obtain N-1 operation value display data groups;
compressing the display data set in a predetermined manner to obtain a compressed data set comprises:
and after the N-1 display data groups are combined, compressing the combined data groups in a preset mode to obtain a combined compressed data group, wherein N is more than or equal to 3.
Exemplarily, fig. 2 is a schematic diagram of a data compression process provided in an embodiment of the present invention, and referring to fig. 2, assuming that a display panel corresponds to three display data sets, one display data set is selected as a reference display data set, the other two display data sets are respectively a first display data set and a second display data set, then data in the reference display data set is subtracted from data in the first display data set to obtain a first operation value display data set, data in the reference display data set is subtracted from data in the second display data set to obtain a second operation value display data set, and then the first operation value display data set and the second operation value display data set are combined and compressed to obtain a combined compressed data set, and when storage is needed, only the combined compressed data set and the reference compressed data set are stored; the storage capacity of the memory is generally integral multiple of a certain storage capacity, for example, the capacity of the memory is 16M, when the storage capacity is increased, the storage capacity is directly increased to 32M, and the data volume of one display data group is generally 8M, by combining and compressing the display data except for the reference display data group, the capacity of the compressed data group can be conveniently controlled within 8M, and the capacity of the memory is not required to be additionally increased; the data size of the merged compressed data set can be set to be the same as that of the reference display data set, so that the memory capacity can be utilized to the maximum extent, the compression rate of the display data set can be reduced, and the distortion rate can be reduced.
In other embodiments, N-1 operation value display data sets are respectively subjected to preset operation with data of a reference display data set to obtain N-1 operation value display data sets; compressing the display data set in a predetermined manner to obtain a compressed data set comprises: and combining the M display data groups, and then compressing the combined compressed data groups in a preset mode (N-1 is more than or equal to M and more than or equal to 2, and N is more than or equal to 4), wherein the uncombined operation value display data groups can be compressed or not compressed in the preset mode.
Optionally, taking one display data set of the N display data sets as reference display data, and performing a preset operation on data of at least one display data set of the remaining N-1 display data sets and data of the reference display data set to obtain at least one operation value display data set includes: respectively subtracting the data of the rest N-1 display data groups from the data of the reference display data group to obtain N-1 operation value display data groups; compressing the operand display data set in a predetermined manner to obtain a compressed data set includes: combining N-1 operation value display data sets into at least two operation value display data set sets, wherein each operation value display data set comprises at least two operation value display data sets, combining the at least two operation value display data set sets respectively, and then compressing each operation value display data set into at least two combined compressed data sets respectively in a preset mode, wherein N is more than or equal to 5. In this embodiment, for example, it may be set that operation value display data sets with similar display modes are combined into an operation value display data set, the display modes are different refresh frequencies, the display modes may be combined according to the magnitude of the refresh rate, the refresh rate is lower than 60Hz to form an operation value display data set, the refresh rate is greater than or equal to 60Hz and less than or equal to 100Hz to form an operation value display data set, the refresh rate is greater than 100Hz to form an operation value display data set, and the display panel is frequently switched between the display modes that are closer when in use. By the arrangement, the decompressed data volume in the decompression process is small, the operation speed is improved, and the display data decompressed at one time can meet the requirements of most application scenes. In some other embodiments, the display modes may be classified according to their use frequencies, for example, if the refresh rates are 80Hz and 120Hz, the corresponding operation value display data sets are combined into one operation value display data set, and the operation value display data sets corresponding to other refresh rates are combined into another operation value display data set.
Optionally, the display mode corresponding to the reference display data set corresponds to a reference display mode of the display panel.
Specifically, the reference display mode may be set when the display panel is shipped from a factory, the display panel has higher performance, such as lower power consumption, and better display effect, the display panel generally operates in the reference display mode, the reference display mode may be, for example, 60Hz, and the display data set corresponding to the reference display mode has bulkiness and integrity, and the distortion rate of compressed data may be reduced by using the display data set as the reference display data set.
Meanwhile, the reference display data group can not be compressed, the display panel runs in a display mode corresponding to the reference display data group in most scenes, the reference display data group is not compressed, namely, the data of the reference display data group is directly loaded during display, and the loaded data cannot cause data distortion due to the compression or decompression process, so that the display uniformity of the display panel in the reference display mode is improved, and the display effect is improved.
Illustratively, the preset manner includes: huffman coding, arithmetic coding, run length coding, or dictionary coding. The method has the advantages of high compression rate, low distortion rate, high algorithm stability, convenience in decompression and the like, and by adopting the encoding mode, the difficulty of the compression method can be reduced, and the stability is improved.
Fig. 3 is a schematic structural diagram of a display data compression apparatus according to an embodiment of the present invention, and referring to fig. 3, the compression apparatus includes: an obtaining module 201, configured to obtain N display data sets corresponding to N display modes one to one, where N is greater than or equal to 2, and N is an integer; the operation module 202 is configured to use one display data set of the N display data sets as a reference display data set, and perform a preset operation on data of at least one display data set of the remaining N-1 display data sets and data of the reference display data set to obtain at least one operation value display data set. Wherein at least part of the data in the operation value display data group is smaller than the data in the corresponding reference display data group; and the compression module 203 is configured to compress the operation value display data set in a preset manner to obtain a compressed data set.
The obtaining module 201 can directly fetch the N display data sets from the memory, where each display data set includes a plurality of compensation data, for example, each sub-pixel in the display panel corresponds to one compensation data, the display panel has a plurality of sub-pixels, and how many compensation data exist in one display data set; the number of the compensation data in each display data group is the same, one display data group can be selected from the N display data groups as a reference display data group, the operation module 202 performs preset operation on the data of at least one display data group in the rest N-1 groups and the data of the reference display data group, for example, performs difference operation, for example by differencing the data of at least one of the remaining N-1 sets with respect to the data of the reference display data set, the difference is made by subtracting the data of the reference display data set from the data of at least one of the rest N-1 display data sets, or subtracting the data of at least one of the rest N-1 display data sets from the data of the reference display data set; if the difference between the display data corresponding to the same sub-pixel in different display modes is small, the difference between the display data and the same sub-pixel can make the operation value small, and if the reference display data before the difference and at least one display data in the rest N-1 display data groups are 0xFFFF and 0 xffffe respectively, and the operation value after the difference is 1, two values of 0xFFFF and 1 can be stored, and compared with the storage of two values of 0xFFFF and 0 xffffe, the stored value is reduced, and the required number of bits (bits) is also small, so that the data amount is greatly reduced. Although the data is reduced after the difference is made by the difference making module 201, the number of the data is still large, the compression module 203 can compress the operation value display data set in a preset mode to obtain a compressed data set, and compared with directly compressing the display data set, on one hand, the compression rate can be improved, and on the other hand, because the operation value display data set is obtained through the operation of the reference display data set, the relevance between the compressed data set and the reference display data set can be improved, and the compression distortion rate is low.
The compression device adopted in the embodiment and the compression method provided by the embodiment of the invention are based on the same concept, so that the compression device also has the same beneficial effects as the compression method provided by the embodiment of the invention, and the details are not repeated herein.
Optionally, the operation module 202 is configured to perform a difference between the remaining N-1 display data sets and the reference display data, respectively, to obtain N-1 operation value display data sets; the compression module 203 is configured to combine the N-1 display data sets and then compress the combined data sets by using a preset method to obtain a combined compressed data set, where N is greater than or equal to 3. The storage capacity of the memory is generally an integral multiple of a certain storage capacity, for example, the storage capacity of the memory is 16M, and when the storage capacity is increased, the storage capacity is directly increased to 32M, and the data volume of one display data group is generally 8M, and by combining and compressing the display data except for the reference display data group, the capacity of the compressed data group can be conveniently controlled within 8M, and the storage capacity does not need to be additionally increased.
Fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 4, the display device includes a display panel 100 and a display driver 200, where the display driver 200 is configured to store a compressed data set and a reference display data set obtained by a compression method according to any embodiment of the present invention, and drive the display panel to emit light according to the compressed data set and the reference display data set.
Specifically, the display device may include: the display device comprises a plurality of scanning signal lines (GL 1-GLk) extending in the row direction, a plurality of data signal lines (DL 1-DLj) extending in the column direction and intersecting with the scanning signal lines, wherein the scanning signal lines and the data signal lines intersect to form a plurality of pixel regions in which a plurality of sub-pixels can be arranged, when the scanning signal lines are sequentially selected, namely scanning pulses are output to the scanning lines, the sub-pixels of the row connected with the scanning lines are selected and opened, the opened sub-pixels can receive gray scale voltages transmitted by the data signal lines, and the sub-pixels PX can display corresponding gray scales according to the received gray scale voltages.
The display driver 200 comprises an external memory 302 and a timing controller 301, the timing controller 301 comprises an internal memory 2011, a decompression unit 2012 and a control processing unit 2013, the internal memory 2011 is used for receiving and storing the compressed data set stored by the external memory 302 and the reference display data set; the decompression unit 2012 is configured to decompress the compressed data set to obtain an original display data set; the control processing unit 2013 is used for generating a display driving signal according to the input image data and the reference display data set or generating a display driving signal according to the input image data and the original display data set; the display panel 100 displays an image according to the display driving signal.
The external memory 302 may be, for example, a memory on the display device motherboard, which may be a RAM memory, a ROM memory, a FLASH memory, or the like, preferably a FLASH memory; the time schedule controller 301 obtains data from an external memory when the display panel is displaying, when the display panel is operating in a reference display mode, the time schedule controller 301 obtains a reference display compensation data set from the external memory, specifically, the reference display compensation data is input into the control processing unit 2013 through the internal storage unit 2011, the internal storage unit 2011 can be a RAM, the reference display data set does not need to be decompressed, but the N display data sets usually contain compensation data at certain specific gray scale points, such as compensation data only containing 128 gray scales and corresponding 255 gray scales, so as to further reduce the data amount, and the control processing unit 2013 can generate display driving signals according to an internally stored mura compensation algorithm after receiving image data to be displayed and the reference display data set, the display driving signal comprises compensation data corresponding to any gray scale, can be gray scale data RGB, and can be transmitted to the data signal line through the source driver; it should be noted that the mura compensation algorithm is well known in the art and will not be described in detail herein.
When the display panel is displayed in a display mode other than the reference display mode, the internal storage unit 2011 first obtains the reference display data set and the compressed data set from the external memory 302, the decompression unit 2012 obtains N-1 operation value display data sets different from the reference display data set after decompression, the control processing unit 2013 can calculate the display data set corresponding to the current display mode according to the operation value display data set and the reference display data set, and generate a display driving signal according to the display data set, the received image signal and the internally stored mura compensation algorithm to drive the display panel to emit light.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. 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, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A method of compressing display data, the method comprising:
acquiring N display data groups corresponding to N display modes one by one, wherein N is not less than 2 and is an integer;
taking one display data group in the N display data groups as a reference display data group, and performing preset operation on data of at least one display data group in the rest N-1 display data groups and data of the reference display data group to obtain at least one operation value display data group; wherein at least some of the data in the calculated value display data set is smaller than the data in the corresponding baseline display data set;
and compressing the operation value display data set in a preset mode to obtain a compressed data set.
2. The method of claim 1,
the step of performing preset operation on data of at least one display data group of the rest N-1 display data groups and data of the reference display data group to obtain at least one group of operation value display data groups by using one display data group of the N display data groups as reference display data comprises:
respectively subtracting the data of the rest N-1 display data groups from the data of the reference display data group to obtain N-1 operation value display data groups;
the compressing the operation value display data set in a preset manner to obtain a compressed data set comprises:
and combining the N-1 operation value display data groups, and then compressing in the preset mode to obtain a combined compressed data group, wherein N is more than or equal to 3.
3. The method according to claim 1, wherein the step of performing a predetermined operation on data of at least one display data set of the remaining N-1 display data sets and data of the reference display data set to obtain at least one operation value display data set by using one display data set of the N display data sets as reference display data comprises:
respectively subtracting the data of the rest N-1 display data groups from the data of the reference display data group to obtain N-1 operation value display data groups;
the compressing the operation value display data set in a preset manner to obtain a compressed data set comprises:
and combining the N-1 operation value display data groups into at least two operation value display data group sets, wherein each operation value display data group set comprises at least two operation value display data groups, and compressing the at least two operation value display data group sets respectively in the preset mode after merging respectively to obtain at least two merged compressed data groups, wherein N is more than or equal to 5.
4. The method according to claim 2 or 3, wherein the size of the data amount of the merged compressed data group is the same as the size of the data amount of the reference display data group.
5. The method of claim 1, wherein the display mode corresponding to the reference display data set corresponds to a reference display mode of a display panel.
6. The method of claim 1,
the preset mode comprises the following steps: huffman coding, arithmetic coding, run length coding, or dictionary coding.
7. The method of claim 1, wherein the baseline display data set is not compressed.
8. A compression apparatus for display data, the compression apparatus comprising:
the acquisition module is used for acquiring N display data groups which correspond to the N display modes one by one, wherein N is more than or equal to 2 and is an integer;
the operation module is used for taking one display data group in the N display data groups as a reference display data group, and performing preset operation on data of at least one display data group in the rest N-1 display data groups and data of the reference display data group to obtain at least one operation value display data group; wherein at least some of the data in the calculated value display data set is smaller than the data in the corresponding baseline display data set;
and the compression module is used for compressing the operation value display data set in a preset mode to obtain a compressed data set.
9. A display device, comprising a display panel and a display driver, wherein the display driver is configured to store the compressed data set and the reference display data set obtained by the method according to any one of claims 1 to 7, and to drive the display panel to emit light according to the compressed data set and the reference display data set.
10. The display device according to claim 9, wherein the display driver includes an external memory and a timing controller;
the time sequence controller comprises an internal memory, a decompression unit and a control processing unit, wherein the internal memory is used for receiving and storing the compressed data set and the reference display data set stored by the external memory;
the decompression unit is used for decompressing the compressed data group to obtain an original display data group;
the control processing unit is used for generating a display driving signal according to the input image data and the reference display data set or generating a display driving signal according to the input image data and the original display data set;
the display panel displays an image according to the display driving signal.
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