Demura method and system based on slr cameraTechnical field
The present invention relates to the collimation technique field of liquid crystal display, in particular it relates to the demura side based on slr cameraMethod and system.
Background technology
Liquid crystal panel has small volume, low in energy consumption, the advantages that high resolution, is used widely in daily life.ButIts complex manufacturing technology, during the manufacturing, various display defects occur unavoidably, it is most common as CF is extremely causedColourity is uneven, and display brightness caused by backlight module brightness disproportionation is abnormal etc., and these display defects are referred to as mura phenomenons.These becauseElement can bring visual discomfort, have a strong impact on the quality of liquid crystal panel.To improve mura defects, demura technologies have obtained extensivelyGeneral application.Brightness and chroma offset situation of the demura technologies according to liquid crystal panel different zones, by changing display pictureGTG, improve the display homogeneity of liquid crystal panel.
Current demura systems all include following two hardware devices：Mm professional camera special, master control PC.For obtaining mura lettersThe mm professional camera special of breath needs part the most expensive in very high precision and resolution ratio, and whole system.Based on mm professional camera specialDemura system prices can be in any more yet, fancy price has had a strong impact on the popularization and application of demura technologies.
The content of the invention
For in the prior art the defects of, it is an object of the invention to provide a kind of demura methods based on slr camera andSystem.
According to a kind of demura methods based on slr camera provided by the invention, including：
Brightness calibration look-up table generation step：
Brightness of the liquid crystal panel center under different GTGs is measured by Luminance Analysis instrument；
The parameter of slr camera is set, liquid crystal panel is shot under different GTGs；
The parameter of slr camera is changed according to the photo of shooting, slr camera distortion is corrected, liquid crystal panel is existedShot under different GTGs；
Generate the image brightness calibration corresponding with true brightness of each GTG of the slr camera shooting under different parametersLook-up table；
Luminance compensation coefficient generation step：
The GTG of fixed liquid crystal panel, the brightness of diverse location is measured by Luminance Analysis instrument；
The parameter of slr camera is set, liquid crystal panel is shot；
The parameter of slr camera is changed according to the photo of shooting, slr camera distortion is corrected, liquid crystal panel is enteredRow shooting；
Generate luminance compensation coefficient table of the slr camera under different parameters in different zones；
Data recording step：
The accurate of each gray-scale intensity information is generated according to the brightness calibration look-up table of generation and luminance compensation coefficient tableMonochrome information；
Offset data adjustment liquid crystal panel is generated according to accurate monochrome information.
Preferably, the parameter of the slr camera includes ISO, aperture and shutter.
Preferably, the different GTGs include totally 256 grades of 0-255.
According to a kind of demura systems based on slr camera provided by the invention, including：
Brightness calibration look-up table generation module：
Brightness of the liquid crystal panel center under different GTGs is measured by Luminance Analysis instrument；
The parameter of slr camera is set, liquid crystal panel is shot under different GTGs；
The parameter of slr camera is changed according to the photo of shooting, slr camera distortion is corrected, liquid crystal panel is existedShot under different GTGs；
Generate the image brightness calibration corresponding with true brightness of each GTG of the slr camera shooting under different parametersLook-up table；
Luminance compensation Coefficient generation module：
The GTG of fixed liquid crystal panel, the brightness of diverse location is measured by Luminance Analysis instrument；
The parameter of slr camera is set, liquid crystal panel is shot；
The parameter of slr camera is changed according to the photo of shooting, slr camera distortion is corrected, liquid crystal panel is enteredRow shooting；
Generate luminance compensation coefficient table of the slr camera under different parameters in different zones；
Data recording module：
The accurate of each gray-scale intensity information is generated according to the brightness calibration look-up table of generation and luminance compensation coefficient tableMonochrome information；
Offset data adjustment liquid crystal panel is generated according to accurate monochrome information.
Preferably, the parameter of the slr camera includes ISO, aperture and shutter.
Preferably, the different GTGs include totally 256 grades of 0-255.
Compared with prior art, the present invention has following beneficial effect：
The present invention is calibrated with Luminance Analysis instrument to slr camera, then can be obtained with common slr camera accurateMonochrome information, reach and substitute mm professional camera special with slr camera to implement the purpose of demura technologies, so as to reduce demura systemsOverall price.
Brief description of the drawings
The detailed description made by reading with reference to the following drawings to non-limiting example, further feature of the invention,Objects and advantages will become more apparent upon：
Fig. 1 is the flow chart of brightness calibration look-up table of the present invention generation；
Fig. 2 is the flow chart of luminance compensation coefficient of the present invention generation；
Fig. 3 is a kind of schematic diagram of the demura systems based on slr camera of the present invention.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this areaPersonnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this areaFor personnel, without departing from the inventive concept of the premise, some changes and improvements can also be made.These belong to the present inventionProtection domain.
A kind of demura methods based on slr camera provided by the invention, including：Brightness calibration look-up table generation step,Luminance compensation coefficient generation step and data recording step.
As shown in figure 1, brightness calibration look-up table generation step includes：
Brightness calibration look-up table generation step：
Brightness of the liquid crystal panel center under different GTGs is measured by Luminance Analysis instrument；
The parameter of slr camera is set, liquid crystal panel is shot under different GTGs；
The parameter of slr camera is changed according to the photo of shooting, slr camera distortion is corrected, liquid crystal panel is existedShot under different GTGs；
Generate the image brightness calibration corresponding with true brightness of each GTG of the slr camera shooting under different parametersLook-up table；
Luminance compensation coefficient generation step：
The GTG of fixed liquid crystal panel, the brightness of diverse location is measured by Luminance Analysis instrument；
The parameter of slr camera is set, liquid crystal panel is shot；
The parameter of slr camera is changed according to the photo of shooting, slr camera distortion is corrected, liquid crystal panel is enteredRow shooting；
Generate luminance compensation coefficient table of the slr camera under different parameters in different zones；
Data recording step：
The accurate of each gray-scale intensity information is generated according to the brightness calibration look-up table of generation and luminance compensation coefficient tableMonochrome information；
Offset data adjustment liquid crystal panel, the storage flash of burning liquid crystal display panel are generated according to accurate monochrome information.
In the present embodiment, the parameter of slr camera includes ISO, aperture and shutter；Different GTGs are total to including 0-255256 grades.
As shown in figure 3, according to the above-mentioned demura methods based on slr camera, one kind that the present invention also provides is based on single anti-The demura systems of camera, including：
Brightness calibration look-up table generation module：
Brightness of the liquid crystal panel center under different GTGs is measured by Luminance Analysis instrument；
The parameter of slr camera is set, liquid crystal panel is shot under different GTGs；
The parameter of slr camera is changed according to the photo of shooting, slr camera distortion is corrected, liquid crystal panel is existedShot under different GTGs；
Generate the image brightness calibration corresponding with true brightness of each GTG of the slr camera shooting under different parametersLook-up table；
Luminance compensation Coefficient generation module：
The GTG of fixed liquid crystal panel, the brightness of diverse location is measured by Luminance Analysis instrument；
The parameter of slr camera is set, liquid crystal panel is shot；
The parameter of slr camera is changed according to the photo of shooting, slr camera distortion is corrected, liquid crystal panel is enteredRow shooting；
Generate luminance compensation coefficient table of the slr camera under different parameters in different zones；
Data recording module：
The accurate of each gray-scale intensity information is generated according to the brightness calibration look-up table of generation and luminance compensation coefficient tableMonochrome information；
Offset data adjustment liquid crystal panel, the storage flash of burning liquid crystal display panel are generated according to accurate monochrome information.
In the present embodiment, the parameter of slr camera includes ISO, aperture and shutter；Different GTGs are total to including 0-255256 grades.
Present invention may apply to brightness mura compensation and color spot mura compensation.Wherein liquid crystal display area obtainsTake, camera distortion correction, offset data, which produces, can use known universal means to produce.
One skilled in the art will appreciate that except realizing system provided by the invention in a manner of pure computer readable program codeAnd its beyond each device, module, unit, completely can be by the way that method and step progress programming in logic be provided come the present inventionSystem and its each device, module, unit with gate, switch, application specific integrated circuit, programmable logic controller (PLC) and embeddingEnter the form of the controller that declines etc. to realize identical function.So system provided by the invention and its every device, module, listMember is considered a kind of hardware component, and is used to realize that device, module, the unit of various functions also may be used to what is included in itTo be considered as the structure in hardware component；It both can be real that will can also be considered as device, module, the unit of realizing various functionsThe software module of existing method can be the structure in hardware component again.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentionedParticular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadowRing the substantive content of the present invention.In the case where not conflicting, the feature in embodiments herein and embodiment can any phaseMutually combination.