CN111243525B - Method and device for adaptively adjusting Demura according to display brightness - Google Patents
Method and device for adaptively adjusting Demura according to display brightness Download PDFInfo
- Publication number
- CN111243525B CN111243525B CN202010163054.5A CN202010163054A CN111243525B CN 111243525 B CN111243525 B CN 111243525B CN 202010163054 A CN202010163054 A CN 202010163054A CN 111243525 B CN111243525 B CN 111243525B
- Authority
- CN
- China
- Prior art keywords
- demura
- component
- value
- compensation
- delta
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
-
- 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
-
- 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
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
-
- 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
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
Abstract
The invention belongs to the technical field of AMOLED display systems, and particularly discloses a method and a device for adaptively adjusting Demura according to display brightness, wherein the method comprises the steps of obtaining a maximum output brightness value Lv in a gamma lookup table I during normal display brightness, and configuring a Demura compensation table; acquiring a maximum output brightness value Lv' in the gamma lookup table II when the brightness is abnormally displayed; calculating a coefficient K according to Lv and Lv'; setting the red component, the green component and the blue component of the Demura input end as R, G and B, respectively calculating K multiplied by R, K multiplied by G, K multiplied by B as a red input value, a green input value and a blue input value of a Demura compensation table, and respectively searching the Demura compensation table according to the input values to obtain a compensation value delta R/delta G/delta B; dividing the compensation value delta R/delta G/delta B by K to serve as a final compensation value, and calculating a red component, a green component and a blue component of a Demura output end respectively; the compensation value of the Demura can be adaptively adjusted according to different gamma lookup tables, and the optimal compensation effect of the Demura can be ensured when the Demura has different display brightness.
Description
Technical Field
The invention relates to the technical field of AMOLED display systems, in particular to a method and a device for adaptively adjusting Demura according to display brightness.
Background
AMOLED (active Matrix Organic Light Emitting diode) has been increasingly used in high performance displays. Due to the limitation of crystallization process, when LTPS TFTs are fabricated on a large-area glass substrate, TFTs at different positions usually have non-uniformity in electrical parameters such as threshold voltage, mobility, etc., and the non-uniformity is converted into a luminance difference to be perceived by human eyes, i.e., Mura phenomenon. The non-uniformity of the electrical parameters is difficult to overcome completely in the process, at present, manufacturers commonly adopt Demura to compensate the brightness difference, so that the brightness of the whole panel is homogenized, the brightness of all pixels reaches an ideal value, and fig. 1 is a schematic flow diagram of Demura.
The AMOLED display system needs to use a Gamma Correction module to satisfy a certain Gamma characteristic (usually Gamma is 2.2) between the display brightness and the input digital signal, and one AMOLED display system often needs a Gamma Correction module having multiple sets of Gamma lookup tables corresponding to different display brightness.
At present, due to the limitation of Flash, only one set of Demura compensation tables is configured in the AMOLED display system, the set of Demura compensation tables only meets the setting of one set of Gamma lookup tables, usually the setting of the Gamma lookup tables in normal display brightness, and when the Gamma Correction module is set as the Gamma lookup table in abnormal display brightness, the Demura compensation effect is influenced.
Disclosure of Invention
In view of the above disadvantages in the prior art, an object of the present invention is to provide a method and an apparatus for adaptively adjusting Demura according to display brightness, which can prevent Demura from being affected by display brightness setting and maintain a good compensation effect at each display brightness.
According to a first aspect of the embodiments of the present disclosure, there is provided a method for adaptively adjusting Demura according to display brightness, the method including:
acquiring a maximum output brightness value Lv in a gamma lookup table I during normal display brightness, and configuring a Demura compensation table;
acquiring a maximum output brightness value Lv' in the gamma lookup table II when the brightness is abnormally displayed;
calculating a target coefficient K according to Lv and Lv';
setting a red component, a green component and a blue component of a Demura input end as R, G and B, calculating K multiplied by R, K multiplied by G, K multiplied by B to be respectively used as a red input value, a green input value and a blue input value of the Demura compensation table, and respectively searching the Demura compensation table according to the red input value, the green input value and the blue input value to obtain a compensation value delta R/delta G/delta B;
dividing the compensation values Δ R/Δ G/Δ B by K respectively as final compensation values, i.e.
Respectively as final compensation values of the red component, the green component and the blue component;
separately calculating the Red component at the output of the Demura
Green component
Blue component
Preferably, the target coefficient K is calculated by the following formula:
wherein gamma is set to 2.2.
According to a second aspect of the embodiments of the present disclosure, there is provided an apparatus for adaptively adjusting Demura according to display brightness, the apparatus including:
the input calculation unit is used for receiving a red component R, a green component G and a blue component B which are input at the current point of the display panel, wherein K multiplied by R, K multiplied by G, K multiplied by B is calculated according to a target coefficient K which is calculated in advance and is respectively used as a red input value, a green input value and a blue input value of a Demura compensation table, and the Demura compensation table is searched according to the red input value, the green input value and the blue input value to obtain a compensation value delta R/delta G/delta B;
an output calculating unit for outputting red component R ', green component G ', and blue component B ' output by the current point of the display panel, wherein the final compensation value of the red component is calculated according to the target coefficient K and the compensation value Δ R/Δ G/Δ B of Demura
Final compensation value of green component
Final compensation value of blue component
And calculating red component R '═ R + delta R', green component G '═ G + delta G' and blue component B '═ B + delta B' of the output end of the Demura respectively.
Preferably, the device further comprises an obtaining unit, configured to obtain the maximum output brightness value Lv in the first gamma lookup table during normal display brightness, configure the Demura compensation table, and obtain the maximum output brightness value Lv 'in the second gamma lookup table during abnormal display brightness, and calculate a target coefficient K according to Lv and Lv'.
Preferably, the target coefficient K is calculated by the following formula:
wherein gamma is set to 2.2.
The method and the device for adaptively adjusting the Demura according to the display brightness have the following advantages: the compensation value of the Demura can be adaptively adjusted according to different gamma lookup tables, and the optimal compensation effect of the Demura can be ensured when the Demura has different display brightness.
Drawings
FIG. 1 is a schematic flow chart of Demura in the background art;
fig. 2 is a schematic flowchart of a method for adaptively adjusting Demura according to display brightness according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for adaptively adjusting Demura according to display brightness according to an embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the predetermined objects, the following detailed description will be given of the method and apparatus for adaptively adjusting Demura according to display brightness, and the specific implementation, structure, features and effects thereof according to the present invention with reference to the accompanying drawings and preferred embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
FIG. 1 is a schematic flow chart of Demura in the background art, which is as follows: a Drive IC lights up the panel to display a plurality of gray scale pictures; shooting by a CCD camera; identifying Mura by using a correlation algorithm according to brightness information acquired by a camera; according to the Mura information, utilizing a Demura compensation algorithm to generate Demura data; burning the Demura data into a Flash ROM; the panel was relight and the Mura was observed for elimination.
Fig. 2 is a schematic flowchart of a method for adaptively adjusting Demura according to display brightness according to an embodiment of the present invention, as shown in fig. 2, the method includes:
acquiring a Demura compensation table, and acquiring a maximum output brightness value Lv in a first gamma lookup table during normal display brightness;
acquiring a maximum output brightness value Lv' in the gamma lookup table II when the brightness is abnormally displayed;
calculating a target coefficient K according to Lv and Lv';
calculating new Demura input values Rin ═ K × R, Gin ═ K × G, and Bin ═ K × B according to the input red component R, green component G, and blue component B, wherein the red component at the Demura input end is R, the green component is G, and the blue component is B, and calculating K × R, K × G, K × B as the red input value, the green input value, and the blue input value of the Demura compensation table, respectively;
calculating a compensation value delta R/delta G/delta B according to a Demura compensation table, wherein the Demura compensation table is searched according to the red input value, the green input value and the blue input value respectively to obtain the compensation value delta R/delta G/delta B;
dividing the compensation values DeltaR/DeltaG/DeltaB by K respectively to obtain the final compensation value of Demura, i.e. dividing the final compensation value by K
Respectively as final compensation values of the red component, the green component and the blue component;
separately calculating the Red component at the output of the Demura
Green component
Blue component
In this embodiment, in order to ensure that the compensation value is not affected by the setting of Gamma Lookup Table, the actual compensation value output by Demura is:
while the final output values of Demura are as follows:
in this embodiment, the target coefficient K is calculated by the following formula:
wherein gamma is set to 2.2.
Fig. 3 is a schematic structural diagram of an apparatus for adaptively adjusting Demura according to display brightness according to an embodiment of the present invention, as shown in fig. 3, the apparatus includes:
the input calculation unit is used for receiving a red component R, a green component G and a blue component B which are input at the current point of the display panel, wherein K multiplied by R, K multiplied by G, K multiplied by B is calculated according to a target coefficient K which is calculated in advance and is respectively used as a red input value, a green input value and a blue input value of a Demura compensation table, and the Demura compensation table is searched according to the red input value, the green input value and the blue input value to obtain a compensation value delta R/delta G/delta B;
an output calculating unit for outputting red component R ', green component G ', and blue component B ' output by the current point of the display panel, wherein the final compensation value of the red component is calculated according to the target coefficient K and the compensation value Δ R/Δ G/Δ B of Demura
Final compensation value of green component
Final compensation value of blue component
And calculating red component R '═ R + delta R', green component G '═ G + delta G' and blue component B '═ B + delta B' of the output end of the Demura respectively.
In this embodiment, the method further includes an obtaining unit, configured to obtain a maximum output brightness value Lv in the first gamma lookup table during normal display brightness, configure the Demura compensation table, and obtain a maximum output brightness value Lv 'in the second gamma lookup table during abnormal display brightness, and calculate a target coefficient K according to Lv and Lv'.
In this embodiment, the target coefficient K is calculated by the following formula:
wherein gamma is set to 2.2.
The invention can adaptively adjust the compensation value of the Demura according to different gamma lookup tables, and ensures that the Demura has the optimal compensation effect when the display brightness is different.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. A method for adaptively adjusting Demura according to display brightness is characterized by comprising the following steps:
acquiring a maximum output brightness value Lv in a gamma lookup table I during normal display brightness, and configuring a Demura compensation table;
acquiring a maximum output brightness value Lv' in the gamma lookup table II when the brightness is abnormally displayed;
calculating a target coefficient K according to Lv and Lv';
setting a red component, a green component and a blue component of a Demura input end as R, G and B, calculating K multiplied by R, K multiplied by G, K multiplied by B to be respectively used as a red input value, a green input value and a blue input value of the Demura compensation table, and respectively searching the Demura compensation table according to the red input value, the green input value and the blue input value to obtain a compensation value delta R/delta G/delta B;
dividing the compensation values Δ R/Δ G/Δ B by K respectively as final compensation values, i.e.
Respectively as final compensation values of the red component, the green component and the blue component;
separately calculating the Red component at the output of the Demura
Green component
Blue component
The target coefficient K is calculated by the formula:
wherein gamma is set to 2.2.
2. An apparatus for adaptively adjusting Demura according to display brightness, comprising:
the input calculation unit is used for receiving a red component R, a green component G and a blue component B which are input at the current point of the display panel, wherein K multiplied by R, K multiplied by G, K multiplied by B is calculated according to a target coefficient K which is calculated in advance and is respectively used as a red input value, a green input value and a blue input value of a Demura compensation table, and the Demura compensation table is searched according to the red input value, the green input value and the blue input value to obtain a compensation value delta R/delta G/delta B;
an output calculating unit for outputting red component R ', green component G ', and blue component B ' output by the current point of the display panel, wherein the final compensation value of the red component is calculated according to the target coefficient K and the compensation value Δ R/Δ G/Δ B of Demura
Final compensation value of green component
Final compensation value of blue component
And respectively calculating a red component R '═ R + delta R', a green component G '═ G + delta G' and a blue component B '═ B + delta B' of the output end of the Demura; the device also comprises an acquisition unit, a gamma lookup table I, a Demura compensation table I and a gamma correction unit, wherein the acquisition unit is used for acquiring the maximum output brightness value Lv in the gamma lookup table I during normal display brightness, configuring the Demura compensation table I and acquiringThe maximum output brightness value Lv 'in the gamma lookup table II when the brightness is displayed abnormally calculates a target coefficient K according to Lv and Lv'; the target coefficient K is calculated by the formula:
wherein gamma is set to 2.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010163054.5A CN111243525B (en) | 2020-03-10 | 2020-03-10 | Method and device for adaptively adjusting Demura according to display brightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010163054.5A CN111243525B (en) | 2020-03-10 | 2020-03-10 | Method and device for adaptively adjusting Demura according to display brightness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111243525A CN111243525A (en) | 2020-06-05 |
| CN111243525B true CN111243525B (en) | 2021-12-10 |
Family
ID=70876774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010163054.5A Active CN111243525B (en) | 2020-03-10 | 2020-03-10 | Method and device for adaptively adjusting Demura according to display brightness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111243525B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707926B (en) * | 2020-06-22 | 2022-03-08 | 武汉精立电子技术有限公司 | Detection method and integration method of product to be integrated |
| CN111707925B (en) * | 2020-06-22 | 2022-03-08 | 武汉精立电子技术有限公司 | Detection method and demura integration method for display panel |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1770875A (en) * | 2004-11-04 | 2006-05-10 | 乐金电子（沈阳）有限公司 | Brightness coefficient repairing device and method for image display apparatus |
| CN102426816B (en) * | 2011-11-19 | 2014-04-02 | 昆山工研院新型平板显示技术中心有限公司 | Method for repairing bad display of active-matrix organic light-emitting display |
| CN105096827B (en) * | 2015-08-14 | 2017-12-08 | 京东方科技集团股份有限公司 | Gamma curve adjusting method and device |
| US10283071B2 (en) * | 2016-09-12 | 2019-05-07 | Novatek Microelectronics Corp. | Driving apparatus and method |
| US10304393B2 (en) * | 2017-08-21 | 2019-05-28 | Novatek Microelectronics Corp. | Brightness compensation method and circuit |
| CN110473502A (en) * | 2018-05-09 | 2019-11-19 | 华为技术有限公司 | Control method, device and the terminal device of screen intensity |
| CN108877736B (en) * | 2018-05-31 | 2020-03-03 | 昆山国显光电有限公司 | Compensation method and device for eliminating uneven screen brightness |
-
2020
- 2020-03-10 CN CN202010163054.5A patent/CN111243525B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111243525A (en) | 2020-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105741764B (en) | The method for eliminating OLED display panel Mura | |
| CN108630148B (en) | Method for compensating brightness difference of display panel and display | |
| US8730275B2 (en) | Display device, brightness adjustment device, method of adjusting brightness, and program | |
| US9483976B2 (en) | Method, apparatus and system for display compensation based on reference luminance values obtained from test pictures | |
| US20190325817A1 (en) | Display unit, image processing unit, and display method for improving image quality | |
| US10971060B2 (en) | Method of adjusting display brightness, light-emission control circuit and display device | |
| CN110930954B (en) | Display brightness compensation method and compensation system | |
| CN111243525B (en) | Method and device for adaptively adjusting Demura according to display brightness | |
| WO2020232588A1 (en) | Screen brightness control apparatus and method | |
| CN111816121B (en) | Display panel brightness compensation method and system and display panel | |
| CN109064966B (en) | Driving method and driving chip of display panel and display device | |
| CN109147685B (en) | Mura compensation method | |
| US11676549B2 (en) | Method of controlling display of display device, apparatus thereof, and display apparatus | |
| CN108831381A (en) | Show data alignment system and display data adjustment method | |
| JP2005321786A (en) | Organic luminescence display and its color shift compensation method | |
| CN109461408B (en) | Display brightness compensation method, device and system | |
| KR101149216B1 (en) | Display apparatus and control method thereof | |
| KR101962646B1 (en) | LED Module Brightness and Color Compensation Apparatus and Method thereof | |
| US20160012571A1 (en) | Image processor and image processing system including the same | |
| JP2007028333A (en) | Image display apparatus, and apparatus, system and method for adjusting white balance | |
| TW201926303A (en) | Display device | |
| CN107274857B (en) | Method for adjusting output image of display and display system | |
| CN111899690A (en) | Method and device for improving low-brightness Mura | |
| KR20220010650A (en) | Image data corrector and display device having the same | |
| KR20200040325A (en) | Display device and method of driving the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Room 1905, building 4, No. 209, Zhuyuan Road, high tech Zone, Suzhou City, Jiangsu Province 215000 Patentee after: Sunrise Microelectronics (Suzhou) Co.,Ltd. Address before: Room 1905, building 4, No. 209, Zhuyuan Road, high tech Zone, Suzhou City, Jiangsu Province 215000 Patentee before: Sheng Microelectronics (Suzhou) Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |