CN108344749A - A method of liquid crystal display defect layered weighting is carried out based on two-sided array camera - Google Patents
A method of liquid crystal display defect layered weighting is carried out based on two-sided array camera Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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Abstract
The invention discloses a kind of methods carrying out liquid crystal display defect layered weighting based on two-sided array camera, two cameras are arranged above the cover-plate glass of tested liquid crystal display, the visual field of two cameras respectively covers entire liquid crystal display range；Determine that the angle in two cameras between the lens plane of first camera and the lens plane of second camera and cover-plate glass is respectively first angle and second angle；Determine that the distance between central point and cover-plate glass of the lens plane of first camera and second camera is the first distance and second distance；Respectively by two camera focusings to the cover-plate glass upper surface of tested liquid crystal display；The third angle and fourth angle between the lens plane and egative film of two cameras are adjusted respectively so that two cameras are satisfied by the following conditions：When the elongated surfaces of the cover-plate glass surface of tested liquid crystal display, the respective egative film of two cameras and two respective lens planes of camera intersect at same straight line, is taken pictures to tested liquid crystal display using two cameras, obtain two detection images.
Description
Technical field
The present invention relates to liquid crystal display defect detecting technique fields, more particularly to one kind carrying out liquid crystal display based on two-sided array camera
The method of defect layered weighting.
Background technology
Liquid crystal display be using liquid crystal material as basic module, by change voltage come change liquid crystal material interior molecules arrangement from
And shading and translucent effect are generated, and then the equipment that image is shown.The lasting raising of demand with people to liquid crystal display, liquid crystal
Screen has formd huge industry.
As shown in Figure 1, be a kind of currently used LCD structure schematic diagram, the liquid crystal display in the depth direction, from
It is interior to outside successively include backlight layer 1, down polaroid 2, TFT substrate 3, liquid crystal layer 4, upper polaroid 5, cover-plate glass 6.Wherein backlight
Layer 1 provides light for light emitting source, and the light sent out by backlight layer 1 generates polarised light by 2 polarisation of down polaroid, and TFT substrate 3 is controlled
Signal voltage processed, and signal voltage is applied to liquid crystal layer 4 and then controls the deflection angle of liquid crystal molecule, at this time down polaroid 2
It allows light one direction to pass through with the control of upper polaroid 5, is shown eventually by cover-plate glass 6.Due to the complexity of LCD structure,
Defect may be formed in production.For example, on for backlight layer 1, between down polaroid 2 and TFT substrate 3, TFT substrate 3 with
Between liquid crystal layer 4, between liquid crystal layer 4 and upper polaroid 5, five kinds of positions between upper polaroid 5 and cover-plate glass 6 may deposit
In a class defect.Based on the demand of production and qualitative control to liquid crystal display, need to be accurately positioned the position where a class defect,
To formulate the scheme of different reparation defects according to the point class defective locations after determination.
Optical detecting method is generally used to liquid crystal display point class defects detection, including the method for one camera imaging.It will
The surface of the alignment lens liquid crystal display of one camera, the i.e. surface of cover-plate glass 6 are imaged the range of entire liquid crystal display.Postulated point class
Defect is any position in above-mentioned five kinds of positions there are dust, at the form of expression of picture be bright spot under black picture,
Or the dim spot under white picture.This dim spot or bright spot represent dust.But it can not be judged by the method that one camera is imaged
Dust is present in which depth location of liquid crystal display.
Invention content
This application provides a kind of methods carrying out liquid crystal display defect layered weighting based on two-sided array camera, to solve liquid crystal
Screen can not determine defect in liquid crystal display the technical issues of specific level when carrying out defects detection.
In order to solve the above technical problems, the embodiment of the invention discloses following technical solutions：
A method of liquid crystal display defect layered weighting is carried out based on two-sided array camera, is included the following steps：
Two cameras are set above the cover-plate glass of tested liquid crystal display, and the visual fields of two cameras respectively covers whole
A liquid crystal display range；
Determine the lens plane of first camera and the lens plane of second camera and the cover board glass in two cameras
Angle between glass is respectively first angle and second angle；
Determine the distance between the central point of the lens plane of the first camera and second camera and described cover-plate glass
For the first distance and second distance；
Two cameras are focused to the cover-plate glass upper surface of the tested liquid crystal display respectively；
The third angle and fourth angle between the lens plane and egative film of two cameras are adjusted respectively so that described
Two cameras are satisfied by the following conditions：The cover-plate glass surface of the tested liquid crystal display, the respective egative film of two cameras and
When the elongated surfaces of the respective lens plane of two cameras intersect at same straight line, using two cameras to the tested liquid crystal
Screen is taken pictures, and two detection images are obtained.
Preferably, two cameras, the visual field of two cameras are symmetrical arranged above the cover-plate glass of tested liquid crystal display
The respective entire tested liquid crystal display range of covering, the first angle and second angle are equal, first distance and the
Two apart from equal, and the third angle and fourth angle are equal.
Preferably, the first angle and second angle are 45 °.
Preferably, further include：It, will be in two detection images according to the image-forming information of the point class defect of two detection images
Point class defect pairing judges to put class defect described in described two detection images with the presence or absence of opposite for same point class defect
Displacement, if it is not, then point class defect is located at the upper surface of cover-plate glass.
Preferably for same point class defect, if putting class defect described in described two detection images has opposite position
It moves, then continues the position for judging described class defect；For same point class defect, if the left camera being arranged above liquid crystal display
Detection image in, described class defect is deviated to the left side, and in the detection image of right camera, described class defect is to the right
It deviates, then lower section of the defect in liquid crystal display cover-plate glass upper surface.
Preferably for same point class defect, if putting class defect described in described two detection images has opposite position
It moves, specific level of the point class defect in liquid crystal display is determined according to the relative distance between same point class defect.
Preferably, according to the image-forming information of the point class defect of two detection images, the point class in two detection images is lacked
Sunken correspondence is matched, and calculating puts the opposite offset distance between class defect by the point class defect in two detection images
It is matched.
Preferably, be tested liquid crystal display thickness be greater than or equal to 0.1mm, width be less than or equal to 88mm, length be less than or
Equal to 132mm.
Preferably, the third angle and fourth angle between the lens plane and egative film of two cameras are adjusted respectively,
So that two cameras are satisfied by the following conditions：Cover-plate glass surface, respective egative film and the respective camera lens of tested liquid crystal display are flat
It when the elongated surfaces in face intersect at same straight line, is taken pictures to liquid crystal display using two cameras, obtains two detection images, wherein institute
The degree of regulation for stating third angle and third angle is 0.01 °.
It is by above technical scheme as it can be seen that provided in an embodiment of the present invention a kind of based on two-sided array camera progress liquid crystal display defect
Two cameras are arranged above the cover-plate glass of tested liquid crystal display in the method for layered weighting, and the visual field of two cameras is each
From the entire liquid crystal display range of covering；Determine the lens plane of first camera and the lens plane of second camera in two cameras
Angle is respectively first angle and second angle between the cover-plate glass；Determine the camera lens of first camera and second camera
The distance between the central point of plane and the cover-plate glass are the first distance and second distance；Two camera focusings are arrived respectively
The cover-plate glass upper surface of liquid crystal display；The third angle between the lens plane and egative film of two cameras and are adjusted respectively
Four angles so that two cameras are satisfied by the following conditions：The cover-plate glass surface of tested liquid crystal display, respective egative film and respective
It when the elongated surfaces of lens plane intersect at same straight line, is taken pictures to liquid crystal display using two cameras, obtains two detection images.
In the above process, the enlargement ratio after camera imaging as needed first determines the cover board of the camera lens and liquid crystal display of two cameras
The distance between glass, i.e. the first distance and second distance, so that point class defect has clear in detection image after being imaged
Offset effect, determine the angle between camera lens plane and cover-plate glass, that is, determine the lens plane and lid of first camera
First angle between glass sheet, the second angle between the lens plane and cover-plate glass of second camera, and second angle with
First angle is equal, in addition exists between cover-plate glass in the lens plane of first camera and second camera for satisfaction certain
Picture quality after being imaged when angle, will be set as the structure of angle adjustable, adjusts respectively between camera lens plane and egative film
Save the third angle and fourth angle between first camera and the lens plane and egative film of second camera so that first camera and the
Two cameras and reference plane focusing are clear, and shooting obtains detection image.Obtain first camera and the second phase respectively using the above method
The detection image of machine can not only judge a little according to the offset of detection image midpoint the class defect and image center of acquisition
Specific location of the class defect point in liquid crystal display, and the depth information of some class defects can be obtained, completion exists to class defect
Specific level positioning in liquid crystal display further helps technical staff to handle the point class defect of liquid crystal display, analysis site class
Defect Producing reason and improvement production technology, are conducive to the quality of production for improving LCD screen.
It should be understood that above general description and following detailed description is only exemplary and explanatory, not
The application can be limited.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without creative efforts, also
It can be obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of currently used LCD structure schematic diagram；
Fig. 2 is a kind of method carrying out liquid crystal display defect layered weighting based on two-sided array camera provided in an embodiment of the present invention
Flow diagram；
Fig. 3 is the schematic diagram that a kind of double camera provided by the embodiments of the present application distinguishes different layer defects；
Fig. 4 is a kind of schematic diagram that two-sided array camera is layered defect provided by the embodiments of the present application；
Fig. 5 is the schematic diagram that a kind of two-sided array camera provided by the embodiments of the present application meets Pehanorm law；
Fig. 6 is a kind of structural schematic diagram of liquid crystal layer point class defect layering provided by the embodiments of the present application；
Fig. 7 is the structural schematic diagram of a kind of class defect correspondence provided by the embodiments of the present application.
Specific implementation mode
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described implementation
Example is only some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, the common skill in this field
The every other embodiment that art personnel are obtained without making creative work should all belong to the application protection
Range.
Liquid crystal display is widely used display equipment, has formed huge industry.It is produced in the manufacture of liquid crystal display
In the process, liquid crystal display mass defect optical detection apparatus is the key that the monitoring liquid crystal display quality of production.Due to LCD structure
Complexity and particularity, point class defect are likely to occur between different layers.The one camera point class defects detection side used at present
Method cannot be distinguished in the defects of liquid crystal display different layers.
Fig. 2 is a kind of method carrying out liquid crystal display defect layered weighting based on two-sided array camera provided in an embodiment of the present invention
Flow diagram, detection method includes the following steps for the defect location：
Step S101：Two cameras are set above the cover-plate glass of tested liquid crystal display, the visual field of two cameras is equal
Respectively cover entire liquid crystal display range.
The detection of liquid crystal display point class defect at present generally uses one camera to be imaged, but it is rough to use one camera imaging to be only capable of
It judges whether defect, can not but judge that dust is specifically present in the depth location of liquid crystal display, it is therefore desirable to use double camera
Principle of parallax.Specifically, referring to Fig. 3, Fig. 3 is the principle that a kind of double camera provided by the embodiments of the present application distinguishes different layer defects
Two cameras, are placed in the top of tested liquid crystal display by figure, wherein plane of the optical axis of a camera perpendicular to tested liquid crystal display,
Another camera then slant setting, there are certain angles between optical axis and tested liquid crystal display, and ensure that two cameras can be clapped
Take the photograph the image of complete tested LCD screen.To ensure that two cameras can shoot liquid crystal display images, adjustment described two
The visual field of platform camera so that the visual field of two cameras covers entire liquid crystal display range.Technical staff can also be to institute simultaneously
It states the camera parameters such as time for exposure, the aperture size of two cameras to be configured, ensures that two cameras can obtain clearly
Complete liquid crystal display images.
Step S102：Determine the lens plane of first camera and the lens plane of second camera and institute in two cameras
Angle is respectively first angle and second angle between stating cover-plate glass.
Due to the complexity and particularity of LCD structure, most thin a layer thickness only has 100 μm in liquid crystal display, and mesh
The resolution accuracy of preceding imaging is 20 μm, therefore distinguish using a kind of double camera shown in Fig. 3 the schematic diagram of different layer defects
The offset pixels that method obtains only have 5, cannot meet the requirement of Sampling Theorem.It therefore need to be by two cameras in LCD screen
Inclined upward is arranged, and specifically, referring to Fig. 4, Fig. 4 is that a kind of two-sided array camera provided by the embodiments of the present application divides defect
Two cameras, are placed in the top of liquid crystal display, and two cameras are obliquely installed, between optical axis and liquid crystal display by the schematic diagram of layer
There is certain angle, even if being present in one layer of upper surface most thin in liquid crystal display and following table using the method point class defect
On face, its parallax also can reach 10 pixels in the detection image of obtained point class defect, can meet wanting for Sampling Theorem
It asks, and is had verified that by experiment.
Step S103：It determines between the central point of the lens plane of first camera and second camera and the cover-plate glass
Distance is the first distance and second distance.
Two first angles and second angle between camera and liquid crystal display are determined respectively by step S102, according to need
The amplification factor for the detection image wanted determine first camera between the cover-plate glass of liquid crystal display first distance and second
Camera is to the second distance between liquid crystal display cover-plate glass.
Step S104：Respectively by two camera focusings to the cover-plate glass upper surface of liquid crystal display；
It in practical applications, can be according in liquid crystal display by two camera focusings to the upper surface of the cover-plate glass of liquid crystal display
Opposite offset pixels in specific thickness and two detection images of acquisition between same point class defect obtain a class defect
The specific location in liquid crystal display.
Step S105：The third angle and fourth angle between the lens plane and egative film of two cameras are adjusted respectively
Degree so that two cameras are satisfied by the following conditions：Cover-plate glass surface, respective egative film and the respective camera lens of tested liquid crystal display
It when the elongated surfaces of plane intersect at same straight line, is taken pictures to liquid crystal display using two cameras, obtains two detection images.
By step S102 and step S103 determine first angle and second angle and the first distance with second away from
From, and first camera and second camera are focused to the cover-plate glass upper surface of liquid crystal display.However in practical applications, it tiltedly claps
Camera can not but obtain and be clearly imaged, the size for being primarily due to current LCD screen is 4-8inch, and optical resolution
It is 20 μm, to meet the requirement of detection, needs to be at least 29M using the resolution ratio of corresponding imaging system camera, therefore be full
The imaging of the camera of sufficient 29M, it is 1-2mm to need the depth of field theoretical value of the camera lens selected and the imaging system of camera composition, however
Require the imaging MTF of camera proximal end, center, distal end in imaging when will be more than 0.3 when camera is tiltedly clapped, it is clear just to access
Image, but the depth of field of 1-2mm cannot meet requirement of the camera in oblique clap completely, so that it is clear that the phase function tiltedly clapped obtains
Clear image will be set as adjustable angle section structure between camera and egative film.Specifically, implement for the application referring to Fig. 5, Fig. 5
A kind of two-sided array camera that example provides meets the schematic diagram of Pehanorm law.As can be seen from Figure, angle a is the mirror of first camera
Angle first angle between head plane and the lens plane and cover-plate glass of second camera and second angle, distance u are first
The distance between the central point and cover-plate glass of camera and the lens plane of second camera the first distance and second distance, distance v
For first camera and second camera egative film central point to lens plane central point apart from third distance and the 4th distance,
First angle and second angle, the first distance and second distance and third distance and the 4th distance are it is known that by first
Angle and second angle, the first distance and second distance and third distance and the 4th distance obtain the third for meeting Pehanorm law
Angle and fourth angle, that is, angle b adjust third angle and fourth angle respectively so that the cover-plate glass table of tested liquid crystal display
When the extended line in face, respective egative film and respective lens plane intersects at same straight line, you can so that first camera and second
Camera is clear to the focusing of liquid crystal display cover-plate glass, to obtain clearly detection image.
In the embodiment of the present application, two cameras arranged symmetrically above the cover-plate glass of tested liquid crystal display, described two
The visual field of camera respectively covers entire liquid crystal display range, and the first angle and second angle are equal, first distance and
Second distance is equal, and the third angle and fourth angle are equal.
Specifically, after obtaining detection image, by comparing in two detection images between obtained same point class defect
Opposite offset pixels, analysis site class defect specific level in liquid crystal display.Therefore first camera and second camera need to be obtained and is examined
Parameter setting all same when altimetric image, i.e. first camera are symmetrical arranged with second camera, and first angle is equal to second angle,
First distance is equal to second distance, and third angle is equal to fourth angle.
In the embodiment of the present application, the first angle and second angle are 45 °, when first angle is small with second angle
When 45 °, the offset effect unobvious of the point class defect obtained in two detection images, when first angle is big with second angle
When 45 °, then it can not ensure the image quality of two detection images obtained.
In the embodiment of the present application, further include：According to the image-forming information of the point class defect of two detection images, two are examined
Point class defect pairing in altimetric image judges that class defect is put described in described two detection images is for same point class defect
No there are relative displacements, if it is not, then point class defect is located at the upper surface of cover-plate glass.
In the embodiment of the present application, for same point class defect, if putting class defect described in described two detection images
There are relative displacements, then continue the position for judging described class defect；For same point class defect, if setting above liquid crystal display
Left camera detection image in, described class defect is deviated to the left side, and in the detection image of right camera, described class
Defect is deviated to the right, then lower section of the defect in liquid crystal display cover-plate glass upper surface.
In the embodiment of the present application, for same point class defect, if putting class defect described in described two detection images
There are relative displacements, and specific level of the point class defect in liquid crystal display is determined according to the relative distance between same point class defect.
Specifically, in actual application, selecting the cover-plate glass upper surface of liquid crystal display as focusing plane, by two phases
Machine focusing is to the cover-plate glass upper surface of liquid crystal display, and the same point class defect of different layers is in the magazine opposite offset in left and right two
Pixel is different, according to the offset pixels of same point class defect, can distinguish the position where defect, specific distance in liquid crystal display
The thickness of each layer also has relationship.Referring to Fig. 6, Fig. 6 is a kind of knot of liquid crystal layer point class defect layering provided by the embodiments of the present application
Structure schematic diagram.For example, every layer of thickness is 100 μm in liquid crystal display, the optical resolution of camera is 20 μm, same point class defect
It is not deviated in first camera and relative position in second camera, then this class defect is located at the upper surface of cover-plate glass；It is same
Point class defect is located at cover board glass in first camera and 10 pixels of relative offset distance in second camera, then this class defect
Between glass and upper polaroid；Same point class defect 20 pixels of relative offset distance in first camera and second camera,
Then this class defect is between upper polaroid and liquid crystal layer；Same point class defect opposite position in first camera and second camera
30 pixels of offset distance are set, then this class defect is between liquid crystal layer and TFT substrate；Same point class defect is in first camera
With 40 pixels of relative offset distance in second camera, then this class defect is between TFT substrate and down polaroid；Together
Some class defects 50 pixels of relative offset distance in first camera and second camera, then this class defect is positioned at lower inclined
The lower surface of mating plate.
In the embodiment of the present application, according to the image-forming information of the point class defect of two detection images, by two detection images
In point class defect matched, calculate the opposite offset distance between point class defect by the point class defect in two detection images
It is matched.Specifically, it is the structural representation of a kind of class defect correspondence provided by the embodiments of the present application referring to Fig. 7, Fig. 7
Figure.As can be seen from Figure, every layer of thickness is 100 μm in liquid crystal display, and the optical resolution of camera is 20 μm, cover-plate glass
Point class defect between upper polaroid and the point class defect between upper polaroid and liquid crystal layer are located at the right side of liquid crystal display, the two
It is respectively positioned on the lower section of cover-plate glass upper surface, therefore after the imaging of second camera, both deviated to the right, since the two exists
It is positioned relatively close on vertical direction in liquid crystal, therefore in the detection image after second camera imaging, the position of the two is non-
Very close to, then need at this time combine first camera imaging after detection image a class defect is matched.Second is selected first
Class defect is put one of in the detection image of camera respectively between two class defects in the detection image of first camera
Distance accurately calculated, if in the point class defect in the detection image of second camera and first camera detection image wherein
Relative distance between one class defect is 10 pixels, and with another class defect in first camera detection image it
Between relative distance be less than 20 pixels, then the point class defect in this second camera detection image with apart from first camera detect scheme
As in 10 pixels point class defect be same point class defect, this time point class defect between cover-plate glass and upper polaroid,
It then will be between remaining class defect in another point class defect in second camera detection image and first camera detection image
Distance is accurately calculated, and relative distance between the two is 20 pixels, then for same point class defect and positioned at upper polarisation
Between piece and liquid crystal layer.
In the embodiment of the present application, the thickness for being tested liquid crystal display is greater than or equal to 0.1mm, and width is less than or equal to 88mm,
Length is less than or equal to 132mm.In application process, the resolution accuracy of two cameras used is 20 μm, is sampled to meet
It being obtained in detection image after two camera imagings of law, the offset pixels between same point class defect need to reach 10 pixels, because
The thickness of this liquid crystal display need to be more than or equal to 0.1mm, while to ensure that tested liquid crystal display is completely covered the visual field of two cameras, need
The distance between two cameras and tested liquid crystal display, i.e. object distance are adjusted according to the size of tested liquid crystal display, and the size of object distance is then
The depth of field that can influence camera, when the width of tested liquid crystal display is more than 88mm and length is more than 132mm, to ensure two cameras
Visual field tested liquid crystal display is completely covered, the distance of two cameras to tested liquid crystal display need to be increased so that two cameras point
After the cover-plate glass of tested liquid crystal display Dui Jiao not arrived, the object distance between the egative film and cover-plate glass of two cameras increases, and finally leads
It causes to cannot be satisfied the requirement of the depth of field and clearly detection image can not be obtained.
In the embodiment of the present application, adjust respectively third angle between the lens plane and egative film of two cameras and
Fourth angle so that two cameras are satisfied by the following conditions：The cover-plate glass surface of tested liquid crystal display, respective egative film and respectively
The elongated surfaces of lens plane when intersecting at same straight line, taken pictures to liquid crystal display using two cameras, obtain two detection images,
Wherein, the degree of regulation of the third angle and third angle is 0.01 °.In actual application, two cameras are placed in
Behind the top of the cover-plate glass of tested liquid crystal display, two angles and two cameras between camera and cover-plate glass are determined respectively
After to the distance between cover-plate glass, for ensure proximal end when camera imaging, center, distal end imaging MTF be all higher than 0.3, because
This is set as adjustable angle section structure between lens plane and egative film by camera, adjust respectively the lens planes of two cameras with
Angle between egative film so that two camera focusings are clear, clearly image obtained after shooting, by the lens plane of two cameras
Angular adjustment precision setting between egative film is 0.01 °, can to the angle between the camera lens and egative film of two cameras into
Row fine tuning so that imaging is relatively sharp.
Since embodiment of above is that reference combination illustrates on other modes, have between different embodiments
There is an identical part, just to refer each other for identical, similar part between each embodiment in this specification.Herein no longer in detail
It illustrates.
It should be noted that in the present specification, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that process, article or equipment including a series of elements include not only those elements, but also
Further include other elements that are not explicitly listed, or further includes for this process, article or the intrinsic element of equipment.
In the absence of more restrictions, there is the element that sentence "including a ..." limits, it is not excluded that including the element
Circuit structure, there is also other identical elements in article or equipment.
Those skilled in the art will readily occur to its of the application after considering specification and putting into practice the disclosure invented here
His embodiment.This application is intended to cover the present invention any variations, uses, or adaptations, these modifications, purposes or
Person's adaptive change follows the general principle of the application and includes the undocumented common knowledge in the art of the application
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are wanted by right
The content asked is pointed out.
Above-described the application embodiment does not constitute the restriction to the application protection domain.
Claims (9)
1. a kind of method carrying out liquid crystal display defect layered weighting based on two-sided array camera, which is characterized in that include the following steps：
Two cameras are set above the cover-plate glass of tested liquid crystal display, the visual field of two cameras respectively covers entire liquid
Crystalline substance screen range；
Determine in two cameras the lens plane of first camera and the lens plane of second camera and the cover-plate glass it
Between angle be respectively first angle and second angle；
Determine that the distance between the central point of the lens plane of the first camera and second camera and described cover-plate glass are the
One distance and second distance；
Two cameras are focused to the cover-plate glass upper surface of the tested liquid crystal display respectively；
The third angle and fourth angle between the lens plane and egative film of two cameras are adjusted respectively so that described two
Camera is satisfied by the following conditions：The cover-plate glass surface of the tested liquid crystal display, the respective egative film of two cameras and described
When the elongated surfaces of two respective lens planes of camera intersect at same straight line, the tested liquid crystal display is clapped using two cameras
According to obtaining two detection images.
2. the method according to claim 1 for carrying out liquid crystal display defect layered weighting based on two-sided array camera, feature exist
In being symmetrical arranged two cameras above the cover-plate glass of tested liquid crystal display, the visual fields of two cameras respectively covers whole
A tested liquid crystal display range, the first angle and second angle are equal, and first distance and second distance are equal, institute
It states third angle and fourth angle is equal.
3. the method according to claim 2 for carrying out liquid crystal display defect layered weighting based on two-sided array camera, feature exist
In the first angle and second angle are 45 °.
4. the method according to claim 1 for carrying out liquid crystal display defect layered weighting based on two-sided array camera, feature exist
In further including：
According to the image-forming information of the point class defect of two detection images, the point class defect in two detection images is matched, for
Same point class defect judges that class defect is put described in described two detection images whether there is relative displacement, if it is not, then point class
Defect is located at the upper surface of cover-plate glass.
5. the method according to claim 4 for carrying out liquid crystal display defect layered weighting based on two-sided array camera, feature exist
In for same point class defect, if point class defect described in described two detection images continues to judge there are relative displacement
The position of described class defect；
For same point class defect, if in the detection image for the left camera being arranged above liquid crystal display, described class defect to
The left side deviates, and in the detection image of right camera, and described class defect is deviated to the right, then the defect is in liquid crystal display cover board
The lower section of glass top surface.
6. the method for carrying out liquid crystal display defect layered weighting based on two-sided array camera according to claim 5, which is characterized in that
For same point class defect, if putting class defect described in described two detection images, there are relative displacements, according to same point class
Relative distance between defect determines specific level of the point class defect in liquid crystal display.
7. the method for carrying out liquid crystal display defect layered weighting based on two-sided array camera according to claim 6, which is characterized in that
According to the image-forming information of the point class defect of two detection images, the correspondence of the point class defect in two detection images is carried out
Matching, the opposite offset distance calculated between point class defect match the point class defect in two detection images.
8. the method according to claim 2 for carrying out liquid crystal display defect layered weighting based on two-sided array camera, feature exist
In the thickness for being tested liquid crystal display is greater than or equal to 0.1mm, and width is less than or equal to 88mm, and length is less than or equal to 132mm.
9. the method for carrying out liquid crystal display defect layered weighting based on two-sided array camera according to claim 1, which is characterized in that
The third angle and fourth angle between the lens plane and egative film of two cameras are adjusted respectively so that two cameras are full
Sufficient the following conditions：The elongated surfaces of the cover-plate glass surface of tested liquid crystal display, respective egative film and respective lens plane intersect at
It when same straight line, is taken pictures to liquid crystal display using two cameras, obtains two detection images, wherein the third angle and third
The degree of regulation of angle is 0.01 °.
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