CN109147716A - Data processing method, display driver chip and display equipment - Google Patents
Data processing method, display driver chip and display equipment Download PDFInfo
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- CN109147716A CN109147716A CN201811011921.2A CN201811011921A CN109147716A CN 109147716 A CN109147716 A CN 109147716A CN 201811011921 A CN201811011921 A CN 201811011921A CN 109147716 A CN109147716 A CN 109147716A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The application provides a kind of data processing method, display driver chip and display equipment.It the treating method comprises: test image is output on the display screen, and obtain the brightness data of N number of block of the display screen；N number of luminance compensation coefficient of N number of block is obtained according to the brightness data of N number of block；And grouping stores the corresponding relationship of N number of luminance compensation coefficient and N number of block, wherein the equal luminance compensation coefficient of numerical value is placed on storage in same data group, and N is positive integer, and N >=2.It is stored by the way that the block information with same brightness penalty coefficient to be placed in the same data group, so that only storing a luminance compensation coefficient in each data group, required memory space is saved, to reduce production cost.
Description
Technical field
This application involves field of display technology, more particularly, to a kind of data processing method, display driver chip and show
Show equipment.
Background technique
Current OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) panel design, generally makes
With LTPS TFT (low-temperature polysilicon film transistor) and Oxide TFT (metal oxide semiconductor films transistor) technique,
Compared with general amorphous silicon film transistor (amorphous-Si TFT), LTPS TFT and Oxide TFT have higher
Mobility and more stable characteristic are more suitably applied to AMOLED (active-matrix organic light emitting diode (AMOLED) panel).In medium and small ruler
Low-temperature polysilicon film transistor (LTPS TFT) is mostly used in the processing procedure of very little panel, and is adopted more in the processing procedure of large size panel
With oxide thin film transistor (Oxide TFT).This is because LTPS TFT mobility is bigger, device occupied area is smaller, more
It is suitable for the application of high PPI (Pixels Per Inch, the number of pixels that per inch includes), and Oxide TFT uniformity is more
Good, technique is compatible with a-Si TFT (amorphous silicon film transistor), is more suitable for producing the face large scale AMOLED on advanced lines line
Plate.
Due to the limitation of crystallization process, the LTPS TFT made in large-area glass substrate, the TFT of different location are normal
Often there is heterogeneity on the electrical parameters such as threshold voltage, mobility, this heterogeneity can be converted into OLED and show
The current difference and luminance difference of device, and perceived by human eye.And although the uniformity of Oxide TFT technique is preferable,
Similar with a-Si TFT, under long-time pressurization and high temperature, threshold voltage will appear drift, since display picture is different, face
The threshold drift amount of plate each section TFT is different, will cause display brightness difference, since luminance difference has with the image shown before
It closes, therefore is often rendered as ghost phenomena on the screen.It is existing that luminance difference under above-mentioned both of these case is referred to as Mura (moire)
As.
For the prior art, Mura phenomenon can be compensated by some modes, for example, according to Mura is reduced in turn
Phenomenon, this scheme are referred to as De-Mura (removing moire).
In the prior art, it is a kind of commonly using De-Mura method be in the peripheral drive circuit of display device lead to
Overcompensation coefficient compensates image, and this compensation way first carries out Mura analysis according to test image, obtains Mura aobvious
Location information on display screen curtain and luminance compensation coefficient is calculated accordingly, the luminance compensation is then applied in the image shown later
Coefficient carries out luminance compensation, to improve the consistency of image frame, so that viewing effect is improved.
However, the storage of luminance compensation coefficient needs additional memory headroom, especially for high-resolution display screen
Curtain, memory headroom needed for storing luminance compensation coefficient will will increase dramatically, so that the manufacturing cost of display equipment is increased, drop
The feasibility of low De-Mura.
Summary of the invention
In view of this, the embodiment of the present application provides a kind of data processing method, display driver chip and display equipment, it is described
Processing method is when grouping stores the corresponding relationship of multiple luminance compensation coefficients and multiple blocks, by the equal luminance compensation of numerical value
Coefficient is placed on storage in same data group, thus memory headroom needed for reducing storage luminance compensation coefficient.
According to a first aspect of the present application, a kind of data processing method is provided, comprising:
Test image is output on the display screen, and obtains the brightness data of N number of block of the display screen；
N number of luminance compensation coefficient of N number of block is obtained according to the brightness data of N number of block；
And grouping stores the corresponding relationship of N number of luminance compensation coefficient and N number of block,
Wherein, the equal luminance compensation coefficient of numerical value is placed on storage in same data group, and N is positive integer, and N >=2.
Preferably, a luminance compensation coefficient is stored in same data group and with the multiple of the luminance compensation coefficient
The location information of block.
Preferably, the location information is the starting position of each block and information or the position of end position
Information is the starting position of each block and the information of block length.
Preferably, the luminance compensation coefficient and the location information are stored using fixed byte.
Preferably, each block is made of multiple continuous pixel units.
Preferably, the display screen is divided into the multiple block.
Preferably, the multiple luminance compensation coefficients for obtaining the multiple block include:
At least one pixel unit is selected from each block；And
Mura information is obtained according to the brightness data of at least one pixel unit, and according to Mura information acquisition brightness
Penalty coefficient.
Preferably, the processing method further include:
Obtain the chroma data of the M block of the test image on the display screen；
M chromatic compensation coefficient of the M block is obtained according to the chroma data；
And the corresponding relationship of grouping storage M chromatic compensation coefficient and the M block, wherein the equal color of numerical value
Degree penalty coefficient is placed on storage in same data group, and M is the positive integer more than or equal to 2.
According to a second aspect of the present application, it provides at a kind of display driver chip, including static access memory and image
Unit is managed, the static access memory is used to store multiple luminance compensation coefficients and multiple blocks that above-mentioned processing method obtains
Corresponding relationship, described image processing unit carries out luminance compensation according to the display image of the luminance compensation coefficient of reading to input
Processing, and export compensated input picture.
According to a second aspect of the present application, a kind of display equipment is provided, comprising:
Show screen；
Memory, for storing the corresponding pass of multiple luminance compensation coefficients and multiple blocks that above-mentioned processing method obtains
System；
Display driver chip, including random access memory and image processing unit, the random access memory is for caching
Input picture and caching are from the luminance compensation coefficient of the memory reading, and described image processing unit is according to the brightness of reading benefit
It repays coefficient and luminance compensation is carried out to the input picture, and show compensated input picture via the display screen.
Preferably, described to show equipment for the display of any one in Mini LED, microLED, LED, OLED and LCD
Equipment.
In one embodiment, by the way that the block information with same brightness penalty coefficient to be placed in the same data group
Storage saves required memory space, to reduce so that only storing a luminance compensation coefficient in each data group
Production cost.
In a preferred embodiment, at least one pixel unit is selected in each block, according at least one pixel unit
Brightness data obtain Mura information, due to reduce calculate Mura information pixel unit quantity, to improve calculating
Efficiency.
Detailed description of the invention
Description by referring to the following drawings to the embodiment of the present application, the above-mentioned and other purpose of the application, feature and
Advantage will be apparent from, in the accompanying drawings:
Fig. 1 is the flow chart of the data processing method of the embodiment of the present application；
Fig. 2 is the structural schematic diagram of the display equipment of the embodiment of the present application.
Specific embodiment
Hereinafter reference will be made to the drawings is more fully described the application.In various figures, identical element is using similar attached
Icon is remembered to indicate.For the sake of clarity, the various pieces in attached drawing are not necessarily to scale.Furthermore, it is possible to be not shown certain
Well known part.
Fig. 1 is the flow chart of the data processing method of the embodiment of the present application.The method can be applied to Mini LED,
In the producing line of the display equipment of microLED, LED, OLED and LCD type, for obtaining luminance compensation coefficient.The processing side
Method specifically includes following steps.
In step s101, test image is exported to display screen.Show that screen is such as smart phone, internet television
Machine, IPAD etc. show the screen of equipment.In this step, preprepared test image is output to display screen.
In step s 102, the brightness data of the N number of block of test image on the display screen is obtained.Brightness data is table
Show the data of the light levels of picture before display screen is taken in.And show that N number of block of screen can be by that will show screen point
Block obtains, and each block may include multiple continuous or discontinuous pixel units, and N is the positive integer more than or equal to 2.Existing skill
In art, the brightness data for obtaining N number of block on display screen is divided into optics extraction-type and electricity extraction-type.Optics extraction-type is
Refer to and is extracted luminance signal by the method that optical CCD (charge-coupled device) takes a picture after lighting backboard.Electricity extracts
Formula, which refers to, is extracted the electrical signal of TFT and OLED by the sensor circuit of driving chip.The mode that optics extracts has
Structure is simple, the flexible advantage of method, therefore is widely adopted at this stage.Electricity is extracted due to needing panel design circuit
Cooperation needs to be added circuit in panel design, but in the panel circuit of current high PPI, additional detection circuit difficulty is added
It is very big, it basically can not be applied in the panels such as mobile phone at present.The brightness data of each block can by it includes pixel list
One or more of brightness value, grayscale, RGB data and driving voltage of member indicate.
In one embodiment, optics extraction-type obtains brightness data specifically: under dark room conditions certainly using luminance meter
Then the test image that dynamic filmed display screen is currently shown analyzes the chroma data of each pixel unit according to output data
(such as chroma data based on RGB) and brightness data are obtained according to the brightness data of all pixels unit on each block
The brightness data of the block.
In step s 103, N number of luminance compensation coefficient of N number of block is obtained according to brightness data.Specifically, for each
Block carries out brightness pressure for the block if the brightness data of the brightness ratio test image of actual displayed here is partially bright
System carries out luminance raising for the block if the brightness data of the brightness ratio test image of actual displayed here is partially dark.
The brightness compacting of each block or the ratio of luminance raising will be directed to as the luminance compensation coefficient of respective block.As background skill
Described in art, the luminance difference between the brightness of the actual displayed of test image and the brightness data of test image on the display screen
Referred to as Mura, and indicate the information of Mura size abbreviation Mura information herein.
It illustrates, it is assumed that block block includes laterally continuous 3 pixel units, and coordinate points are expressed as
The brightness data of (x1, y1), (x1+1, y1), (x1+2, y1), the test image of these three pixel units are RGB expression, are
(R1, G1, B1), (R2, G2, B2) and (R3, G3, B3), and the actual displayed obtained by way of optics extraction-type extraction is bright
Degree is according to for (R1 ', G1 ', B1 '), (R2 ', G2 ', B2 ') and (R3 ', G3 ', B3 '), by the RGB data of corresponding pixel unit
Subtract each other, obtain Mura information, comprehensive analysis is carried out to Mura information, determines the luminance compensation coefficient of three pixel units.
Preferably, for each block, therefrom obtain the brightness data of at least one pixel unit, will it is described at least one
The brightness of the brightness data and test image actual displayed of pixel unit is compared, and obtains the Mura information of the block accordingly.From
And the quantity of the pixel unit of luminance compensation coefficient is participated in by reducing, reduce data calculation amount, to improve calculating effect
Rate.
In step S104, grouping stores the corresponding relationship of N number of luminance compensation coefficient and N number of block.In this step, will
The luminance compensation coefficient obtained in step S103 is grouped storage, specifically, by the block with same brightness penalty coefficient
Information is placed on storage in a data group.For example, being identified as if the luminance compensation coefficient for being identified as the block of 1-100 is 1.2
The luminance compensation coefficient of the block of 200-300 is 0.9, then will be identified as the location information and penalty coefficient 1.2 of the block of 1-100
It is stored in first data group, the location information for being identified as the block of 200-300 and penalty coefficient 0.9 is stored in second
In data group, and so on.
In the present embodiment, by the way that the block information with same brightness penalty coefficient is placed on the same data group memory
Storage saves required memory space, to reduce life so that only storing a luminance compensation coefficient in each data group
Produce cost.
The advantages of the present embodiment is described in detail with a comparative examples below.
Set display screen on block as block1, block2 ..., block2000, corresponding luminance compensation
Coefficient is a1, a2 ... ..., a2000, according to storage mode in the prior art, block and the storage of luminance compensation coefficient are as follows:
Block1 (start, end), a1
Block2 (start, end), a2
Block3 (start, end), a3
Block4 (start, end), a4
……
Wherein, (start, end) indicates the starting position of block and the numerical value of end position.If starting position and end
8 byte storages are respectively adopted in the numerical value of position, and penalty coefficient is using 10 byte storages, then above-mentioned 2000 blocks and compensation
The space size that the corresponding relationship of coefficient needs is 2000*2* (8-bit)+2000* (10-bit)=52000 byte.
And according to the present embodiment, the identical block of luminance compensation coefficient is put together storage, then those are with identical bright
It spends penalty coefficient only to store once in data group, in the item that the storage byte that location information and luminance compensation coefficient use is constant
Under part, memory space needed for generally reducing luminance compensation coefficient, for example, it is assumed that the storage system of block1 and block500
Number it is identical, then corresponding relationship record are as follows: block1 (start, end), block500 (start, end), a1, reduce one it is bright
The storage for spending penalty coefficient, so that required memory space reduces 10 bytes { i.e. (52000-10) byte }.And so on.
The Mura due to caused by the producing line of display equipment generally has regionality, there is significant portion of block institute
The penalty coefficient used be it is identical, only small part block is needed using special penalty coefficient, therefore according to the present embodiment,
Memory space needed for storage luminance compensation coefficient can greatly reduce, so that a large amount of storage of producing line saving for display equipment is empty
Between and the operating time.
In an alternative embodiment, above-mentioned processing method further includes obtaining the process of chromatic compensation coefficient.Specifically,
To show that screen is divided into M block (M be positive integer) more than or equal to 2, for each block, if the coloration of actual displayed with
The chroma data of test image here has deviation, for example, the chroma data based on each pixel unit on each block and
Test image compares in the coloration of the pixel unit actual displayed, obtains chromaticity distortion, is then based on chromaticity distortion and obtains the area
The chromatic compensation coefficient of block.Chromatic compensation coefficient and luminance compensation coefficient use identical storage mode, the i.e. equal color of numerical value
Degree penalty coefficient is placed on storage in same data group.
Fig. 2 is the structural schematic diagram of the display equipment of the embodiment of the present application.Display equipment 200 includes display screen 203, deposits
Reservoir 202 and display driver chip 201.
Memory 202 is used to store the corresponding relationship of luminance compensation coefficient and block.Specifically, in the producing line of display equipment
Stage is burnt to aobvious after obtaining the corresponding relationship of luminance compensation coefficient and block by processing method shown in FIG. 1
Show in the memory of equipment.Memory is, for example, a kind of nonvolatile memory, and data will not lose after power-off.
Display driver chip 201 and memory 202 are electrically connected, including at random access memory (RAM) 2011 and image
Unit 2012 is managed, random access memory 2011 is used to cache input picture and luminance compensation coefficient and the corresponding of block is closed
System, image processing unit 2012 are used to carry out brightness benefit to input picture according to the corresponding relationship of luminance compensation coefficient and block
It repays, and compensated input picture is output on display screen 203 and is shown.
Each display equipment is completed as a result, in the calculating and burning that require completion luminance compensation coefficient in the producing line stage
The time spent required for the offset data of each display equipment is the time spent in penalty coefficient calculates plus penalty coefficient
It is sequentially written in the time of memory.Therefore, when being recorded using the processing method of the embodiment of the present application to offset data, no
The memory space of memory needed for luminance compensation coefficient only can be saved, and can save and be written to luminance compensation data
Time consumed in memory, to improve the output capacity of display equipment and reduce production cost.With display equipment point
The raising of resolution, it will be appreciated that needing to show that screen is divided into more multi-tiling, for more facet to improve display effect
Long-pending block carries out luminance compensation, and the processing method of the present embodiment is applied to be managed luminance compensation coefficient, will be so that aobvious
Show that equipment has more cost advantage.
With the development of the manufacturing process of display equipment, can also increase in display driver chip 201 quiet built in one piece
State access memory is used to store the luminance compensation coefficient in luminance compensation region, in this way, after showing equipment factory, it is aobvious when playing
Diagram as when, without reading luminance compensation coefficient from external memory, but directly from built-in static access memory
Middle reading luminance compensation coefficient carries out luminance compensation to display image.The data of the static access memory are not also lost after a loss of power
It loses.
Chromatic compensation can also be applied in above-mentioned display equipment or display driver chip.Such as it is chromatic compensation coefficient is same
Sample is stored according to above-mentioned processing method into memory, after showing equipment factory, when playing display image, is obtained from memory
Chromatic compensation coefficient is taken to carry out chromatic compensation.For another example increase by one piece of static access memory in display driver chip, according to
Above-mentioned processing method stores chromatic compensation coefficient, whenever playing display image, obtains coloration from static access memory and mends
It repays coefficient and carries out chromatic compensation.The data of the static memory are not also lost after a loss of power.
In an alternate embodiment of the invention, multiple data groups are stored in memory, and each data group stores a luminance compensation
The location information of coefficient and multiple blocks with the luminance compensation coefficient.Location information is, for example, the start bit of each block
The information with end position is set, or is the starting position of each block and the information of block length.
In an alternate embodiment of the invention, luminance compensation coefficient and location information are stored using fixed byte.For example, each data
In group, luminance compensation coefficient is using 8 byte storages, and location information is using 20 byte storages.
In an alternate embodiment of the invention, display screen is into multiple blocks, each block is by multiple continuous pixel lists
Member composition.For each block, the brightness data of at least one pixel unit is therefrom obtained, and be based at least one pixel list
The brightness data of member obtains Mura information, according to Murad information luminance compensation coefficient and is stored.
In another alternative embodiment, above-mentioned processing method further includes obtaining the process of chromatic compensation coefficient.It obtains
Chromatic compensation coefficient can using storage mode identical with luminance compensation coefficient store in memory.
Although the embodiment of the present application is disclosed as above with preferred embodiment, its be not for limiting claim, it is any
Those skilled in the art are not departing from spirit and scope, can make possible variation and modification, therefore this
The protection scope of application should be subject to the range that the claim of this application is defined.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for those skilled in the art
For, the application can have various modifications and changes.All any modifications made within the spirit and principles of the present application are equal
Replacement, improvement etc., should be included within the scope of protection of this application.
Claims (11)
1. a kind of data processing method, comprising:
Test image is output on the display screen, and obtains the brightness data of N number of block of the display screen；
N number of luminance compensation coefficient of N number of block is obtained according to the brightness data of N number of block；And
Grouping stores the corresponding relationship of N number of luminance compensation coefficient and N number of block,
Wherein, the equal luminance compensation coefficient of numerical value is placed on storage in same data group, and N is positive integer, and N >=2.
2. data processing method according to claim 1, wherein store a luminance compensation coefficient in same data group
And the location information of at least one block with the luminance compensation coefficient.
3. data processing method according to claim 1, wherein the location information be each block starting position and
The information of end position or the location information are the starting position of each block and the information of block length.
4. data processing method according to claim 2, wherein using fixed byte store the luminance compensation coefficient and
The location information.
5. data processing method according to claim 1, wherein each block is made of multiple continuous pixel units.
6. data processing method according to claim 1, wherein the display screen is divided into the multiple block.
7. data processing method according to claim 1, wherein the multiple luminance compensations for obtaining the multiple block
Coefficient includes:
At least one pixel unit is selected from each block；And
Mura information is obtained according to the brightness data of at least one pixel unit, and according to Mura information acquisition luminance compensation
Coefficient.
8. data processing method according to claim 1, further includes:
Obtain the chroma data of M block on the display screen；
M chromatic compensation coefficient of the M block is obtained according to the chroma data；
And grouping stores the corresponding relationship of the M chromatic compensation coefficient and the M block, wherein the equal color of numerical value
Degree penalty coefficient is placed on storage in same data group, and M is the positive integer more than or equal to 2.
9. a kind of display driver chip, including static access memory and image processing unit, the static access memory is used
In pair of multiple luminance compensation coefficients and multiple blocks that the described in any item data processing methods of storage claim 1-8 obtain
It should be related to, described image processing unit carries out luminance compensation to the display image of input according to the luminance compensation coefficient of reading, and
Export compensated input picture.
10. a kind of display equipment, comprising:
Show screen；
Memory, for storing the multiple luminance compensation systems obtained such as the described in any item data processing methods of claim 1-8
Several and multiple blocks corresponding relationships；
Display driver chip, including random access memory and image processing unit, the random access memory is for caching input
Image and caching are from the luminance compensation coefficient of the memory reading, and described image processing unit is according to the luminance compensation system of reading
It is several that luminance compensation is carried out to the input picture, and compensated input picture is shown via the display screen.
11. display equipment according to claim 10, wherein the display equipment be Mini LED, microLED, LED,
The display equipment of any one in OLED and LCD.
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| CN112927640A (en) * | 2019-12-05 | 2021-06-08 | 敦泰电子股份有限公司 | Data compression method and storage device for locally compensating uneven brightness of display picture |
| CN112927640B (en) * | 2019-12-05 | 2024-01-30 | 敦泰电子股份有限公司 | Data compression method and storage device for locally compensating uneven brightness of display picture |
| CN111556614A (en) * | 2020-05-09 | 2020-08-18 | 深圳市华星光电半导体显示技术有限公司 | Data processing method of driving circuit and driving circuit |
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| WO2021227151A1 (en) * | 2020-05-09 | 2021-11-18 | 深圳市华星光电半导体显示技术有限公司 | Data processing method for drive circuit, and drive circuit |
| US12004274B2 (en) | 2020-05-09 | 2024-06-04 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Data processing method of driving circuit and driving circuit |
| CN113963663A (en) * | 2021-10-22 | 2022-01-21 | 晟合微电子(肇庆)有限公司 | Pixel driving method, display and readable storage medium |
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Application publication date: 20190104 |