CN100565630C - Display multiangle measurement system and method - Google Patents
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- CN100565630C CN100565630C CNB2006100003109A CN200610000310A CN100565630C CN 100565630 C CN100565630 C CN 100565630C CN B2006100003109 A CNB2006100003109 A CN B2006100003109A CN 200610000310 A CN200610000310 A CN 200610000310A CN 100565630 C CN100565630 C CN 100565630C
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Abstract
A kind of display multiangle measurement system and method, its multiangle measurement system includes a MURA (moire) image acquisition unit, a MURA image process unit and a Database Unit, promptly utilize a multi-angle capture mechanism to capture at MURA phenomenon in the display, then carry out the processing of MURA image analysing computer and identification classification with a MURA image processing program, the detection technique that quantizes MURA is provided, set up quality interactive processing analytical database afterwards, so that the friendly interface and the function of interactive inquiry to be provided.The present invention uses optical texture and the keystone distortion revision program reduction image that the oblique angle is proofreaied and correct increases the depth of field, and utilize " human vision model " to set up simultaneously with moire flaw quantification on the panel, add the handling procedure of the image analysing computer and the identification classification of moire, set up quality interactive processing analytical database, can be applicable to production line, objective and stable measuring system to provide one.
Description
Technical field
A kind of multiangle measurement system and method that is used for MURA phenomenon on the quantized display panel is meant especially by a multi-angle capture mechanism and carries out filming image on a plurality of visual angles of described panel, sets up the database that the quality interactive processing is analyzed.
Background technology
Widespread usage along with flat-panel screens, use in a large number at TV as LCD (LCD), computer monitor, mobile phone, on the various household electrical appliances, the quality of panel of LCD also more and more needs to pay attention under a large amount of production, as color, contrast, reaction time, brightness etc., then observe unusual and moire (MURA) situation that produces of LCD brightness (luminance) about LCD background uniformity coefficient, MURA is meant the inhomogeneous phenomenon that causes various vestiges of display brightness, the demonstration flaw that may when LCD attaches color screen, cause, chip for driving (Drive IC) in addition, liquid crystal itself all may become the origin cause of formation of MURA.
The simplest determination methods of MURA is switching to black picture and other grey menu exactly, carefully go from various angle then, along with manufacture craft flaw miscellaneous, LCD just has MURA miscellaneous, various kinds flaw such as travers or 45 degree angle bead lines, square, circular block, also may be that certain corner occurs one, the low contrast of this type of flaw, irregular demonstration be so the order of severity of MURA also is to judge the important references of panel of LCD quality.
Yet in the known technology, be flaw, and judge panel flaw degree and panel quality, following shortcoming is arranged with its subjective suggestion by professional person's Direct observation LCD picture at the judgement of MURA:
1. be difficult for detection, capture.
2. be difficult for MURA classification, and each tame manufacturer definition is inconsistent to various situations, and the shortcoming index.
3. there is no the standard of describing the MURA order of severity, or too coarse.
Yet, the VESA of international organization (Video Electronics Standards Association) has also done definition (VESA FPDM2 303-8) at all types of MURA, but also only limit to simple definition, there is no the solution of its order of severity of definition and its judgement.
And have part to propose arrangement for detecting and the method for MURA in the known relevant technology, US6 wherein, 154, defined the MURA classification in 561 cases, a lines type MURA who comprises flat-panel screens 10 defective shown in Figure 1A, it is and contiguous different and abnormal pixel (pixel), produces as MURA such as straight line, curve c, L molded lines bar a, vertical bar b, hachure e, thick lines f.And for example the type of block shown in Figure 1B MURA comprises MURA such as dim spot block i, bright spot block g, in addition MURA such as the marginal block h of panel border generation and edge bright spot block j.
And as U.S. Pat 5,917,935 cases are then by setting a threshold value, MURA flaw and background value are done one relatively, thereby draw the degree of MURA flaw, make statistical table, and by flow process shown in Figure 2 therewith statistical table classify and the various MURA flaw state of definition.Step comprises: by the display panel raw frames (step 201) of taking a sample; Raw frames produces a plurality of subsample pictures (step 202) thus; Filter each subsample picture according to different demands, make specific feature as the various kinds performance plot (histogram) of foundation picture and filter (step 203); Again each picture is set a threshold value, use producing feature block (Blob) (step 204); And, judge the MURA flaw (step 205) of this raw frames by the analysis of feature block; And its MURA flaw (step 206) of characterization (characterize); Afterwards, carry out the last action of adjusting, decide certain MURA classification (step 207) by eliminating error detection.
Known technology is promptly mainly only classified various MURA by the step of above-mentioned patent, as lines MURA (Line Mura), spot MURA (Spot Mura), filling MURA (Fill Port Mura), edge MURA (Panel Edge Mura), block MURA (Block Mura) etc., yet it does not judge the quality of display panel at each sampled images (pattern).
And the SEMI international standard has also been delivered the metering definition (SEMI D31-1102) that a kind of flat-paneled display screens image quality MURA checks.But it is above at Mura definition or analyze the area, contrast, the background luminance that all are limited to display and consider, too simple and can not completely present the flaw of flat-panel screens.
Above-mentioned known technology has following shortcoming:
1. employing manual detection, so Reliability is not high, the time disputable.
2. only obtain MURA description or classification physically, there is no the perception of considering people itself, model is too simple.
3. only described and classify, and unmatchful display quality is judged at the seriousness of MURA.
4. in a single day most Automatic Measurement Techniques are dependent on segmentation (segmentation) and are detected, and promptly at the image detection of various different MURA, have too many parameter to determine, if new MURA is arranged, then need new algorithm.
And the problem of manual detection maximum is that manpower has variablees such as tired and individual mood quality, cause and detect wrong or the omission phenomenon, so, influence very big for the consistance of checking quality and stability, therefore be badly in need of the detection technique that development can quantize, to reduce erroneous judgement and dispute.
Summary of the invention
Known for moire (MURA) phenomenon only limit to identification with the definition various forms, utilizing Image sensor apparatus (Image sensing device) capture to detect the then existing a plurality of known systems of MURA releases, but still lack relevant people because of visual database and MURA phenomenon diversity and variational judgement, because still prematurity of technology, be difficult to practicality, the consistance and the quantification of quality control are had any problem.For solve known technology use manual detection produce objective inadequately with do not have consistent judgement rule, the present invention promptly utilizes a multi-angle capture mechanism to capture at the moire phenomenon, the processing module combination of classifying again with a MURA image analysing computer and MURA identification, the detection technique that quantizes MURA is provided, set up quality interactive processing analytical database more friendly interface is provided, and the function of interactive inquiry.
Multiangle measurement system provided by the present invention includes a MURA image acquisition unit, to utilize a multi-angle capture mechanism to capture the image of display pannel, and a MURA image process unit arranged, use the image that receives display pannel, carry out the processing of image analysing computer, identification and classification, one Database Unit is arranged again, is that the data after the image processing is set up an interactive processing analytical database, and the function of interface and interactive inquiry is provided.
And wherein multi-angle capture mechanism includes a plurality of Image sensor apparatus, preferred embodiment is to implement this Image sensor apparatus with CCD (charge coupled cell) or CMOS photo-sensitive cells such as (complementary metal oxide semiconductor (CMOS)s), to carry out the shooting of described display pannel by a plurality of visual angles, wherein preferred embodiment includes a central Image sensor apparatus that is arranged on the positive visual angle of display panel; The one last Image sensor apparatus that is arranged at display pannel vertical angle of view top is arranged; The one following Image sensor apparatus that is arranged at display pannel vertical angle of view below is arranged; The one left Image sensor apparatus that is arranged at display pannel horizontal view angle left is arranged, and one be arranged at right-hand right Image sensor apparatus in display pannel horizontal view angle etc.And each Image sensor apparatus (except that central Image sensor apparatus) comprises that all an oblique angle seat connects the photo-sensitive cell that a camera lens and a CCD or CMOS are implemented, and makes the principal plane and mutual deflection one angle of this photosensitive member surface of this camera lens.
Another embodiment of multi-angle capture mechanism one is set up in the Image sensor apparatus on the track-frame, set slide rail carries out moving of a plurality of directions in this Image sensor apparatus mat track-frame, take described display pannel with a plurality of visual angles, and the principal plane of the included camera lens of this Image sensor apparatus and photosensitive member surface changes mutual deflection along with the shift position angle.
The step of multi-angle measuring method provided by the present invention is for capturing the image on a plurality of visual angles on the panel with a multi-angle capture mechanism earlier, introduce a people afterwards because of vision mode, and produce one and just distinguish difference, the generation of wherein just distinguishing difference is the method for utilization Human Engineering, this MURA is done the qualitative and quantitative analysis, set up the database of human eye vision described display pannel detection level.Then judge the MURA form of this display pannel, and this MURA of mark.Produce the result who quantizes this MURA form at last, and store this quantized result to one database.
Above-mentioned judgement MURA form is to judge spot (Point), lines (Line), V-arrangement striped (V-Band), brush mark (Rubbing), light leak MURA forms such as (Light Leak).And this distinguishes that just the generation of difference is the method for utilization one Human Engineering, and this MURA is done the qualitative and quantitative analysis, sets up the database of human eye vision to this display pannel detection level.
The present invention uses optical texture and the keystone distortion correcting module reduction image that the oblique angle is proofreaied and correct increases the depth of field, and utilize " human vision model " to set up simultaneously with moire flaw quantification on the panel, add the processing module of the image analysing computer and the identification classification of moire, set up quality interactive processing analytical database, can be applicable to production line, objective and stable measuring system to provide one.
Description of drawings
Figure 1A and Figure 1B are the classification synoptic diagram of MURA in the known technology MURA method for detecting;
Fig. 2 is the method for detecting process flow diagram of known technology MURA;
Fig. 3 A is the multi-angle capture of the present invention mechanism first embodiment synoptic diagram;
Fig. 3 B is the multi-angle capture of the present invention mechanism second embodiment synoptic diagram;
Fig. 4 A is an angle of inclination synoptic diagram between Image sensor apparatus and panel;
Fig. 4 B is the inner photo-sensitive cell angularity correction of Image sensor apparatus of the present invention synoptic diagram;
Figure 5 shows that the flow process of the trapezoidal correction of the present invention;
Figure 6 shows that the software flow of MURA image processing of the present invention;
Figure 7 shows that the present invention just distinguishes poor calculation process;
Figure 8 shows that the configuration diagram of interactive processing analytical database of the present invention; And
Fig. 9 detects software operation steps flow process for MURA of the present invention.
The primary clustering symbol description:
A:L shape lines b: vertical bar
C: curve e: hachure
F: thick lines h: determine in the marginarium
G: bright spot block i: dim spot block
J: edge bright spot block
10: flat-panel screens 30: panel
31: central Image sensor apparatus 32: go up Image sensor apparatus
33: following Image sensor apparatus 34: left Image sensor apparatus
35: right Image sensor apparatus 36: Image sensor apparatus
39: track-frame 36 ', 36 ": the Image sensor apparatus position
41: camera lens 43: the image photo-sensitive cell
45: lens aperture 47: the oblique angle seat
Embodiment
Moire (Mura) phenomenon is diversity and variability, be not that single visual angle just can all detect, the present invention uses one or more high resolving power charge coupled cell video cameras (CCD Camera) or complementary metal oxide semiconductor (CMOS) (CMOS) to be carried out the capture detection of display pannel respectively by a plurality of different angles exactly, its multiangle measurement system comprises (1) MURA image acquisition unit, promptly utilizes a multi-angle capture mechanism to capture at the moire phenomenon; (2) MURA image process unit is the processing of carrying out MURA image analysing computer and MURA identification classification with a MURA image processing program, and the detection technique that quantizes MURA is provided; (3) Database Unit is to set up quality interactive processing analytical database, so that the friendly interface and the function of interactive inquiry to be provided.
Because of the MURA phenomenon is diversity and variability, be not that single visual angle just can all detect, so the primary clustering of MURA image acquisition unit of the present invention comprises a multi-angle capture mechanism, use the image of acquisition panel different visual angles, except that positive visual angle, can comprise each 25 degree angle or other suitable angle of flip vertical, can comprise that each miter angle of flip horizontal or other suitable angle inspect.
Preferred embodiment of the present invention multi-angle capture structural scheme of mechanism as shown in Figure 3A, it is five Image sensor apparatus (31 of utilization, 32,33,34,35) take an object, wherein preferred embodiment is to implement this Image sensor apparatus with photo-sensitive cells such as CCD or CMOS, detect the MURA phenomenon as using capture among the present invention, this mechanism comprises one with respect to the central Image sensor apparatus 31 on panel 30 or the positive visual angle of this object, one is arranged at the last Image sensor apparatus 32 of display pannel or top, this object vertical angle of view, one is arranged at the following Image sensor apparatus 33 of display pannel or below, this object vertical angle of view, the one left Image sensor apparatus 34 and that is arranged at left on display pannel or this object horizontal view angle is arranged at right-hand right Image sensor apparatus 35 on display pannel or this object horizontal view angle.The multiangle measurement system of the many Image sensor apparatus shown in mat Fig. 3 A, can capture the image at this panel 30 or these a plurality of visual angles of object, produce the form of MURA with meticulousr criterion, be that image with plural Image sensor apparatus picked-up different angles serve as mainly to invent when reality is implemented, be not limited to five Image sensor apparatus shown in this embodiment.
For reaching the capture purpose of multiangle measurement system of the present invention, Fig. 3 B shows another preferred embodiment, be that an Image sensor apparatus 36 is set up on the track-frame 39, but set slide rail carries out moving of level, vertical or other direction in these Image sensor apparatus 36 mat track-frames 39, as shown in the figure, be arranged at 36 images of taking panel 30 left visual angles of Image sensor apparatus of left; Can utilize track-frame 39 to move to Image sensor apparatus position, below 36 ', then take the image at visual angle, panel 30 below; Or move to right-hand Image sensor apparatus position 36 ", use the image of taking panel 30 right-hand visual angles; Or other is positioned at the arbitrary position on the track-frame 39, uses the image on the visual angle of taking panel 30 particular demands.So, can only use one one or increase an Image sensor apparatus (be not shown in graphic in) that is arranged at central authorities again and reach the purpose that multi-angle is taken panel 30.Wherein the camera lens principal plane of each Image sensor apparatus and photosensitive member surface change the angle of mutual deflection along with the shift position, use to revise and take the depth of field.
In the above-mentioned multi-angle capture mechanism, the Image sensor apparatus that is positioned on vertical angle of view and the horizontal view angle (or other visual angle) then needs to overcome the problem that the pitch angle capture depth of field causes measuring error, as produce angle of inclination capture depth of field deficiency by different visual angles capture meeting, cause causes local Jiao of mistake of image, fuzzy or panel image brilliance change in the scope that Image sensor apparatus shone of a certain angle because of individual angle of inclination is arranged, shown in Fig. 4 A, this Image sensor apparatus produces when exposing to panel.
The present invention promptly utilizes the optical facilities of angle of inclination capture to solve the error that cause at the angle of inclination, for instance, embodiment shown in Fig. 4 A, right Image sensor apparatus 35 are by panel 30 right-hand shootings, and the two ends (end points a and end points b) of shooting institute covering scope have image formation state in various degree.The present invention is via optical design one oblique angle seat, can connect camera lens and Image sensor apparatus respectively, change the surface and the imaging surface angle of image photo-sensitive cell with these optical facilities, revise and solve the not enough problem of the pitch angle capture depth of field, make oblique angle capture image definition, the inner photo-sensitive cell angularity correction of Image sensor apparatus shown in Fig. 4 B synoptic diagram, make camera lens 41 principal planes of right Image sensor apparatus 35 couple an oblique angle seat (Oblique optic structure) 47 with optical design, make mutual deflection one angle of light and image photo-sensitive cell 43 surfaces by camera lens 41, can prolong the depth of field with this, make it can reach the purpose of consistent sharpness capture.
By the coverage two ends a of panel 30, b focuses on lens aperture 45 by camera lens 41, is projected to image photo-sensitive cell 43 again through oblique angle seat 47 in preferred embodiment such as the icon.For making by the every bit that is captured on the panel 30 consistent sharpness (depth of field is identical) is arranged all, so image photo-sensitive cell 43 and camera lens 41 inclinations one suitable angle, when making the image capture, each point has the identical depth of field on the panel 30.Therefore, the shooting at the various visual angles of various relative panels 30 all needs corresponding can the tilt Image sensor apparatus of a certain angle ability of image photo-sensitive cell 43 that has.
Specifically, structural representation shown in Fig. 4 B, because filming image needs to image on the image photo-sensitive cell 43 via this lens aperture 45 or other optical facilities, so this image photo-sensitive cell 43 needs carry out angle tilt according to actual form, make that each point can both have the identical depth of field on the panel 30 when imaging in image photo-sensitive cell 43.
MURA image process unit of the present invention also uses the MURA image processing module in conjunction with the detection technique that can quantize, wherein as MURA image analysing computer (image analysis) and MURA identification classification (identification ﹠amp; Classification) processing module is in conjunction with the method for Human Engineering, MURA is done qualitative (qualitative analysis), quantitative test (quantitative analysis) and experiment, set up the database of human eye vision to the display pannel detection level, with the foundation of this database as the formulation of QC operation or work standard, and the consistance of expectation and then quality control and quantification.Its MURA image process unit mainly comprises:
(1) the keystone distortion correcting module of angle of inclination capture, its objective is make the corresponding tilt image MURA on panel the tram and make things convenient for the image processing procedure operation.
(2) processing module of MURA image analysing computer and identification classification, can detect the form of MURA flaw, comprise spot (Point), lines (Line), V-arrangement striped (V-Band), brush mark (Rubbing), light leak (Light Leak) etc., yet be not limited to the form that this states.
(3) the MURA image processing module is analyzed the people of quantification because of vision mode (Vision Model) database in conjunction with the detection technique interactive processing that can quantize.Promptly use the method for Human Engineering, MURA is done qualitative, quantitative test, set up the database of human eye vision the display pannel detection level, with the foundation of this database as the formulation of QC operation or work standard, and the consistance of expectation and then quality control and quantification.Its technical goal provides one and can be applicable to production line, objective and stable method, the MURA flaw is quantized, and in conjunction with the obtained panel image of image-taking system, utilize human vision model to calculate the mental intensity of the MURA flaw of whole front panel, it is just to distinguish difference (Just Noticeable Difference, JND) expression.
(4) interactive processing analytical database, promptly the interactive processing analytical database is set up a MURA quality interactive processing analytical database, and friendly interface is provided, and the function of interactive inquiry.
The employed means of trapezoidal correction comprise the coordinate (step S501) that defines earlier in the trapezoidal image as shown in Figure 5 in above-mentioned, are by after the above-mentioned multi-angle measuring device capture, capture wherein each location of pixels of image by software, and the definition coordinate position; Carry out coordinate conversion (step S503) afterwards, promptly the location of pixels that photo-sensitive cell captured that CCD or CMOS implement is converted to various coordinate values by software; Then, carry out the corresponding calculating of pixel (step S505), can judge the situation of keystone distortion, promptly utilize interpolation method (Interpolation) to carry out trapezoidal correction (step S507) at last, proofread and correct because the problem that causes image distortion is taken at the angle of inclination with coordinate.Figure 6 shows that the main software flow process of MURA image processing of the present invention, is that the detection technique interactive processing that quantizes is by this analyzed, and the people who produces quantification is because of visual database.During beginning, take back capture (step S601) utilizing above-mentioned multi-angle capture mechanism to carry out measured panel, pre-process (preprocessing) (step S603) before analyzing after the capture, comprising writing down by the back-end computer system by the captured image pixel information of each Image sensor apparatus, as information such as pixel coordinate, brightness, shooting areas, also comprise above-mentioned trapezoidal correction step.
Then carry out the MURA image analysing computer, the MURA that is carried out various forms by software approach provided by the present invention analyzes, judge MURA form in this panel by analysis result, as spot (Point), lines (Line), V-arrangement striped (V-Band), brush mark (Rubbing), light leak (step S605) such as (Light Leak).This flow process can carry out identification at the MURA of one or more forms or kind, analyzes and quantize, if handle the spot MURA in the panel, then through the calculation analysis of spot MURA, draw spot MURA wherein, and give mark (Labeling), i.e. image informations (step S607) such as the coordinate of mark spot MURA, brightness, area.
Quantize (step S609) by above-mentioned analysis result, as calculate the correlative value of MURA, and can add the people because of the parameter correction, as just distinguishing difference (JND value), the people who produces quantification is because of visual database, give objective MURA with real data and judge, again these data are produced form or are stored in database (step S611).The MURA of other various forms also needs to quantize to import the interactive processing analytical database of people because of vision parameter with generation the present invention through steps such as above-mentioned identification, analyses.
The above-mentioned calculating flow process as shown in Figure 7 of just distinguishing difference.
Introduce one earlier with reference to image (step S701), and introduce the MURA image (step S703) that produces through above-mentioned analysis process.To carry out image contrast relatively (step S705) with reference to image and MURA image afterwards, with CSF filtration operation (Contrast Sensitivity Filter, CSF) (step S707), use and calculate human eye vision difference (step S709), calculate the mean value of the difference of each pixel in the image afterwards, wherein preferred embodiment is to merge (Minkowski pooling) mean value method with Ming Keshiji to calculate (step S711), and calculates with this and just to distinguish poor (JND) (step S713).
The running of above-mentioned interactive processing analytical database sees also database schema figure shown in Figure 8.For setting up a MURA quality interactive processing analytical database, this database need comprise the pattern of data foundation and the pattern that data shows, as shown in the figure, this interactive data storehouse 80 includes data updating module 81 and data display mode 83, before data using, need set up this database, comprise data newly-increased 811, functions such as data modification 813 and data deletion 815, set up the database of a MURA analysis and identification, MURA after being convenient to judges, be included in lead-in surface plate gauge lattice (831) under the data display mode, carry out the MURA identification, and produce MURA identification result (833) with the result after the identification with report display (835), using provides the detection technique that quantizes MURA, provide friendly interface to set up quality interactive processing analytical database, and the function of interactive inquiry.
The present invention is a kind of multi-angle robotization image-taking device, it comprises with a plurality of Image sensor apparatus (photo-sensitive cells such as CCD or CMOS) in a plurality of different visual angles captures, and comprises that the angle of inclination that produces the image photo-sensitive cell is can proofread and correct the optical texture of the depth of field when the capture; There is a core MURA to detect software, wherein the MURA image processing module comprise the keystone distortion correcting module, MURA image analysing computer of angle of inclination capture and MURA identification classification processing module, meet the people and judge because of vision and give the vision mode that mathematics quantizes, and collocation detection data interactive process database etc., reach purpose of the present invention in conjunction with above-mentioned image-taking device.
The flow process that Fig. 9 shows detects the software operation steps for MURA of the present invention, comprising three parts such as MURA image capture step (MURA image acquisition unit), MURA image processing step (MURA image process unit) and interactive processing analytical database (Database Unit) inquiries.
During beginning, need that setting completed with multiangle measurement system relevant apparatus provided by the present invention, as purchase a measured panel, purchase multi-angle capture mechanism and finish work such as database connections.
Then, carry out panel image capture (step S901) on a plurality of visual angles by multi-angle capture mechanism, the preferred embodiment of panel image capture step is five Image sensor apparatus (31 shown in utilization Fig. 3 A, 32,33,34,35) capture MURA, with respect to the Image sensor apparatus on five visual angles of panel, another embodiment then uses Fig. 3 B to carry out the shooting of each view directions with an Image sensor apparatus that is set up on the track-frame as icon.Capture after the image on a plurality of visual angles, introduce the people because of vision mode (Vision model) (step S903) on the one hand, and produce JND value (step S905); On the other hand, because database comprises the interactive processing analytical database that MURA quantizes, and provide the function of interface with interactive inquiry, but so data in panel image that the contrast of mat database interface is captured and the database, to judge the multifarious MURA form of image (step S907) on the panel, and after judging a certain specific MURA, carry out the step (step S909) of this MURA of mark (labeling).This specific MURA that states is that mat repeats determining step and judges spot (Point), lines (Line), V-arrangement striped (V-Band), brush mark (Rubbing), light leak MURA forms such as (Light Leak) at the same time or separately, and is not limited to the form of giving an example at this.
In above-mentioned generation JND value and after judging MURA form and mark, the people promptly uses the method for Human Engineering because of vision mode, MURA is done qualitative, quantitative test and experiment, set up the database of human eye vision to the display pannel detection level, produce quantized result (step S911), a MURA image processing module is wherein analyzed the people of quantification because of the vision mode data in conjunction with the detection technique interactive processing that can quantize, to set up quality interactive processing analytical database, so that the friendly interface and the function (step S913) of interactive inquiry to be provided.At last, as the foundation that the QC operation or work standard is formulated, the MURA that reaches consistance and quantification measures purpose with this.
Above-mentioned appended graphic reference and the explanation usefulness of only providing not is to be used for the present invention is limited.
In sum, the present invention uses optical texture and the keystone distortion correcting module reduction image that the oblique angle is proofreaied and correct increases the depth of field, and utilize " human vision model " to set up simultaneously with moire flaw quantification on the panel, add the processing module of the image analysing computer and the identification classification of moire, set up quality interactive processing analytical database, can be applicable to production line, objective and stable measuring system to provide one.
The above only is a preferable possible embodiments of the present invention, and non-so promptly inflexible limit claim of the present invention so the equivalent structure that all utilizations instructions of the present invention and icon content are done changes, all in like manner is contained in the scope of the present invention.
Claims (34)
1. display multiangle measurement system is characterized in that this system includes:
One moire image acquisition unit utilizes a multi-angle capture mechanism to capture the image of a display pannel;
One moire image process unit receives the image of described display pannel, carries out image analysing computer, identification and the processing of classifying;
One Database Unit is set up an interactive processing analytical database with the data after the image processing, and the function of interface and interactive inquiry is provided;
Wherein, described multi-angle capture mechanism includes a plurality of Image sensor apparatus, uses the shooting of being carried out described display pannel by a plurality of visual angles, and these a plurality of Image sensor apparatus include:
One central Image sensor apparatus is arranged on the positive visual angle of described display panel;
Image sensor apparatus on one is arranged at the top on the described display pannel vertical angle of view;
Once Image sensor apparatus is arranged at the below on the described display pannel vertical angle of view;
One left Image sensor apparatus is arranged at the left on the described display pannel horizontal view angle; And
One right Image sensor apparatus is arranged at right-hand on the described display pannel horizontal view angle.
2. display multiangle measurement system as claimed in claim 1, it is characterized in that described Image sensor apparatus, following Image sensor apparatus, left Image sensor apparatus and the right Image sensor apparatus gone up all comprises a camera lens and an image photo-sensitive cell respectively, mutual deflection one angle of the principal plane of wherein said camera lens and described photosensitive member surface.
3. display multiangle measurement system as claimed in claim 2 is characterized in that mat one oblique angle seat makes the principal plane of described camera lens and the deflection that described photosensitive member surface is described angle.
4. display multiangle measurement system as claimed in claim 2 is characterized in that described Image sensor apparatus is to implement with electric charge coupling photo-sensitive cell.
5. display multiangle measurement system as claimed in claim 2 is characterized in that described Image sensor apparatus is to implement with a complementary metal oxide semiconductor (CMOS) photo-sensitive cell.
6. display multiangle measurement system as claimed in claim 1 is characterized in that described moire image process unit comprises:
One keystone distortion correcting module will carry out the keystone distortion correction with the display pannel image after the capture of inclination visual angle;
The processing module of one moire image analysing computer and identification classification is used the form that detects a plurality of moire flaws, comprises spot, lines, V-arrangement striped, brush mark, light leak form;
One moire image processing module because of the vision mode database, is done qualitative, quantitative test to described detected moire in conjunction with a people that can quantize, and sets up the database of human eye vision to this display pannel detection level;
One interactive processing analytical database is the quality interactive processing analytical database of described moire, comprises the function of an interface and interactive inquiry.
7. display multiangle measurement system as claimed in claim 6 is characterized in that described keystone distortion correcting module specifically comprises in the time will carrying out the keystone distortion correction with the display pannel image after the capture of inclination visual angle:
To define the coordinate of described display pannel image;
To change described image pixel position is coordinate figure;
Use corresponding described coordinate and described pixel; And
To proofread and correct described display pannel image.
8. display multiangle measurement system as claimed in claim 7 is characterized in that the processing module of described moire image analysing computer and identification classification specifically comprises when using the form that detects a plurality of moire flaws:
To analyze the moire form of being absorbed;
Image information with the described moire image of mark;
To produce the quantized value of described moire image; And
This quantized value is stored to a people because of visual database.
9. display multiangle measurement system as claimed in claim 8 is characterized in that described image information comprises coordinate, brightness and the area of a plurality of moires of mark.
10. display multiangle measurement system as claimed in claim 8, it is characterized in that when producing the quantized value of described moire image, comprising the correlative value of integrating described moire and people because of the described people of parameter generating because of visual database.
11. display multiangle measurement system as claimed in claim 6 is characterized in that described people is to distinguish just that with one difference represents because of vision mode.
12. display multiangle measurement system as claimed in claim 11 is characterized in that the processing module of described moire image analysing computer and identification classification is specially when calculating is just distinguished difference:
When introducing one during with reference to image and moire image, compare described with reference to image and described moire image, carry out a contrast susceptibility filtration operation with described with reference to image and described moire image, mat described image contrast comparison means and described CSF filtration operation calculate human eye vision difference, calculate a mean value of the difference of each pixel in the described image, the described mean value calculation one of mat just distinguishes poor.
13. display multiangle measurement system as claimed in claim 12 is characterized in that described mean value is that Ming Keshiji merges mean value.
14. display multiangle measurement system as claimed in claim 6 is characterized in that described interactive processing analytical database specifically is used for:
Data updating,, data modification newly-increased comprising data deleted with data; And
Data shows, comprising panel introducing, moire identification and result's report.
15. a display multi-angle measuring method is characterized in that this measuring method is measurement and the quantification that is used for moire phenomenon on the display pannel, includes:
Capturing described display pannel image, is to capture the image on a plurality of visual angles on the described panel with a multi-angle capture mechanism;
Introduce a people because of vision mode;
Produce one and just distinguish difference;
Judge the moire form of described display pannel;
The described moire of mark;
Quantize described moire form; And
Store described quantized result to a database.
16. display multi-angle measuring method as claimed in claim 15, the step that it is characterized in that the described display pannel image of described acquisition are to take with the different visual angles of described display pannel with a multi-angle capture mechanism to form.
17. display multi-angle measuring method as claimed in claim 15, the step that it is characterized in that the described display pannel image of described acquisition is to take described display pannel with a plurality of Image sensor apparatus by a plurality of visual angles.
18. display multi-angle measuring method as claimed in claim 15, the step that it is characterized in that the described display pannel image of described acquisition are the central Image sensor apparatus that is arranged on the positive visual angle of described display panel with, one is arranged at the last Image sensor apparatus of top, described display pannel vertical angle of view, one is arranged at the following Image sensor apparatus of below, described display pannel vertical angle of view, the one left Image sensor apparatus and that is arranged at described display pannel horizontal view angle left is arranged at right-hand right Image sensor apparatus in described display pannel horizontal view angle and takes described display pannel.
19. display multi-angle measuring method as claimed in claim 18, it is characterized in that described Image sensor apparatus, following Image sensor apparatus, left Image sensor apparatus and the right Image sensor apparatus gone up all comprises a camera lens and an image photo-sensitive cell respectively, and the principal plane of wherein said camera lens and mutual deflection one angle of described photosensitive member surface are taken.
20. display multi-angle measuring method as claimed in claim 19 is characterized in that mat one oblique angle seat makes the principal plane of described camera lens and the deflection that described photosensitive member surface is described angle.
21. display multi-angle measuring method as claimed in claim 19 is characterized in that described Image sensor apparatus is to implement with electric charge coupling photo-sensitive cell.
22. display multi-angle measuring method as claimed in claim 19 is characterized in that described Image sensor apparatus is to implement with a complementary metal oxide semiconductor (CMOS) photo-sensitive cell.
23. display multi-angle measuring method as claimed in claim 15, the step that it is characterized in that the described display pannel image of described acquisition be by one be set up on the track-frame the Image sensor apparatus mat wherein slide rail carry out moving of a plurality of directions, to carry out taking described display pannel by a plurality of visual angles.
24. display multi-angle measuring method as claimed in claim 23, it is characterized in that described Image sensor apparatus comprises a camera lens and an image photo-sensitive cell, and the principal plane of described camera lens and described photosensitive member surface changes mutual deflection along with the shift position angle are taken.
25. display multi-angle measuring method as claimed in claim 24 is characterized in that mat one oblique angle seat makes the principal plane of described camera lens and the deflection that described photosensitive member surface is described angle.
26. display multi-angle measuring method as claimed in claim 24 is characterized in that described Image sensor apparatus is to implement with electric charge coupling photo-sensitive cell.
27. display multi-angle measuring method as claimed in claim 24 is characterized in that described Image sensor apparatus is to implement with a complementary metal oxide semiconductor (CMOS) photo-sensitive cell.
28. display multi-angle measuring method as claimed in claim 15 is characterized in that described judgement moire form is to judge spot, lines, V-arrangement striped, brush mark, light leak moire form.
29. display multi-angle measuring method as claimed in claim 15, it is characterized in that the described generation of just distinguishing difference is the method for utilization one Human Engineering, described moire is done the qualitative and quantitative analysis, set up the database of human eye vision described display pannel detection level.
30. display multi-angle measuring method as claimed in claim 15 is characterized in that the step of the described display pannel image of described acquisition more comprises a moire image processing step, this moire image processing step comprises:
Revising a keystone distortion, is the keystone distortion correction of carrying out described panel image with the capture of inclination visual angle.
31. display multi-angle measuring method as claimed in claim 30 is characterized in that described keystone distortion correction step comprises:
Define an image coordinate;
Carry out the conversion of this image coordinate;
Calculate this image coordinate means; And
Carry out the interpolation of this image coordinate.
32. display multi-angle measuring method as claimed in claim 15, the step that it is characterized in that the described moire of described mark comprises coordinate, brightness and the area of a plurality of moires of mark.
33. display multi-angle measuring method as claimed in claim 15 is characterized in that the described calculation procedure of difference of just distinguishing comprises:
Introduce one with reference to image;
Introduce described display panel medium cloud schlieren picture;
The contrast of more described moire image with reference to image and described display panel;
Carry out a contrast susceptibility filtration operation;
Carrying out a human eye vision difference calculates; And
Calculate a mean value and describedly just distinguish poor to calculate.
34. display multi-angle measuring method as claimed in claim 33 is characterized in that described mean value calculation step is to use a Ming Keshiji to merge the mean value method.
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| CNB2006100003109A CN100565630C (en) | 2006-01-04 | 2006-01-04 | Display multiangle measurement system and method |
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| CNB2006100003109A CN100565630C (en) | 2006-01-04 | 2006-01-04 | Display multiangle measurement system and method |
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| CN100565630C true CN100565630C (en) | 2009-12-02 |
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Cited By (1)
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| CN109358438A (en) * | 2018-10-30 | 2019-02-19 | 京东方科技集团股份有限公司 | Moire evaluation method, device and system |
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| CN107358935B (en) * | 2017-08-25 | 2019-12-31 | 惠科股份有限公司 | Optimization mode and equipment for brightness compensation data quantity |
| CN107702896A (en) * | 2017-09-30 | 2018-02-16 | 惠州市德赛西威汽车电子股份有限公司 | A kind of display viewing angles characteristic test device |
| CN107884161A (en) * | 2017-09-30 | 2018-04-06 | 惠州市德赛西威汽车电子股份有限公司 | A kind of display visual characteristic test device |
| CN107765463B (en) * | 2017-10-13 | 2020-08-25 | 上海友衷科技有限公司 | Detection method for liquid crystal screen of instrument panel |
| CN108922481B (en) * | 2018-06-11 | 2020-10-27 | 青岛信芯微电子科技股份有限公司 | Demura implementation method based on side viewing angle of liquid crystal display television |
| CN109870293B (en) * | 2019-03-15 | 2022-06-07 | 合肥鑫晟光电科技有限公司 | Detection method and detection device for display panel |
| CN113012608A (en) * | 2019-12-19 | 2021-06-22 | 西安诺瓦星云科技股份有限公司 | Display module detection method, device and system |
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2006
- 2006-01-04 CN CNB2006100003109A patent/CN100565630C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358438A (en) * | 2018-10-30 | 2019-02-19 | 京东方科技集团股份有限公司 | Moire evaluation method, device and system |
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