CN108760765A - A kind of surface damage defect detecting device and method based on the shooting of side view camera - Google Patents
A kind of surface damage defect detecting device and method based on the shooting of side view camera Download PDFInfo
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- CN108760765A CN108760765A CN201810507932.3A CN201810507932A CN108760765A CN 108760765 A CN108760765 A CN 108760765A CN 201810507932 A CN201810507932 A CN 201810507932A CN 108760765 A CN108760765 A CN 108760765A
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
Abstract
The invention belongs to the automation defect detecting technique field of panel, a kind of surface damage defect detecting device shot based on side view camera and method, including camera, strip source, position adjusting mechanism and master controller are disclosed；The camera and position adjusting mechanism are connected by controlling cable with master controller；The strip source and camera are arranged on the position adjusting mechanism of the side of display screen to be measured；Camera and strip source are located at the same side of display screen, and have the shooting angle of setting between camera and display screen；The present invention is using a strip source as polishing light source, and shooting camera and strip source are arranged in the same side of display screen, avoid the non-uniform situation of camera shooting picture caused by multiple light sources, so that defect is imaged in the shooting picture of camera with higher contrast, the accuracy of defects detection can be improved.
Description
Technical field
The invention belongs to the automation defect detecting technique fields of panel, and side view camera is based on more particularly, to one kind
The surface damage defect detecting device and method of shooting.
Background technology
The production process of the new-type display screens such as LCD/OLED includes nearly hundred procedure, although most of process of display screen is
It is completed in dust free room, but various flaws still inevitably occurs, such as slight crack, scuffing, surface be dirty, bubble and surface
Particle etc.；These defects can seriously affect the display performance of display screen, it is therefore desirable to defects detection is carried out before manufacture；
Current detection method mostly uses automatic optics inspection (Automatic Optic Inspection, AOI), is to adopt
The image for obtaining measured target (usually using camera and camera lens) with optical image technology, is calculated using certain image procossing
Method obtains defective locations from the image of shooting.
It is existing defect detecting device shown in Fig. 1, shooting camera is placed on the surface of screen, is beaten by two side light sources
Light, this light source polishing mode defect are：
1, since camera is in the surface of display screen, the reflected light of two side light sources enters in camera, left and right two
The position of light source, height, the difference of luminous intensity can cause camera shooting picture uneven, be had an impact to shooting effect,
And then influence the accuracy of defects detection；
2, in order to make the brightness uniformity of camera shooting picture, the position to camera and two side view light sources is needed to adjust
Section；It mostly uses and manually adjusts at present, precision is not high and waste of manpower；In addition, for the display screen of different sizes,
The camera of adaptation, the position of light source and angle are different, and existing detection device is not according to the size of display screen to camera
It automatically adjusts with the position of light source, causes the imaging effect of certain display screens poor, and then affect defects detection effect；
3, on actual production assembly line, under the premise of meeting need of work, used device element is fewer, is protected
The spatial margin stayed is the bigger the better, in favor of the installation of other mechanisms；Since the defect type of display screen is not only surface damage
Wound also has brightness caused by display panel internal flaw inaccurate, and this defect needs the camera of facing of other resolution ratio to be placed on top
Portion is shot downwards, is unfavorable for display panel internal flaw so the camera of surface defects detection is placed on right over display screen
The installation of the camera of detection.
Invention content
For at least one defect or Improvement requirement of the prior art, the present invention provides one kind to be shot based on side view camera
Surface damage defect detecting device and method, its object is to solve existing for existing surface defect detection apparatus defect to examine
Survey that accuracy is high, the problem of can not being automatically adjusted to camera and light source position according to the size of display screen.
To achieve the above object, according to one aspect of the present invention, a kind of surface shot based on side view camera is provided
Damage defect detection device, including camera, strip source, position adjusting mechanism and master controller；Camera and position adjust machine
Structure is connected by controlling cable with master controller；
Strip source and camera are arranged on the position adjusting mechanism of the side of display screen to be measured；Camera and bar shaped
Light source is located at the same side of display screen, and has the shooting angle of setting between camera and display screen；
Master controller according to the parameter information of display screen to be measured and camera lens generate camera location information, and according to
Location information generates the first Regulate signal；Position adjusting mechanism adjusts camera position according to the first Regulate signal, so that camera
The location information that position is generated with master controller matches；
The brightness uniformity that master controller is additionally operable to the surface image of the display screen acquired to camera is detected, and is calculated
The coordinate information in brightness irregularities region simultaneously generates the second Regulate signal according to the coordinate information；Position adjusting mechanism is according to
Two Regulate signals adjust the position of strip source, until the picture brightness of the display screen surface image of camera shooting is uniform；It is used in combination
Defects detection is carried out in the surface image of the display screen acquired to camera, number and each defect for obtaining surface defect are corresponding
Coordinate position.
Preferably, above-mentioned surface damage defect detecting device, position adjusting mechanism includes movable displacement platform, and is set up
The first supporting mechanism and the second supporting mechanism on the movable displacement platform；
Movable displacement platform controls the movement of the first supporting mechanism according to the first Regulate signal that master controller is sent out, to adjust
The position of camera on the first supporting mechanism is set；And control second according to the second Regulate signal that master controller is sent out
Support mechanism moves, to adjust the position for the strip source being arranged on the second supporting mechanism.
Preferably, above-mentioned surface damage defect detecting device, master controller include parameter set unit, calculate list
First, automatically controlled adjusting unit, image acquisition units and image processing unit；
Parameter set unit is used to obtain the parameter information of display screen and camera lens to be measured, which includes to be measured
The size of display screen, the target surface size of camera and lens focus；
Computing unit is used to be calculated the operating distance of camera and display screen center according to parameter information；And it is used for basis
The shooting angle of operating distance and setting calculates the height of camera and at a distance from display screen side；
The automatically controlled unit that adjusts is used to generate the first adjusting according to the height of camera and with the range information of display screen side
Signal, first Regulate signal are used to indicate position adjusting mechanism adjustment camera position；
Image acquisition units be used for generates acquisition signal and obtain camera it is described acquisition signal instruction under shoot show
The surface image of display screen；
Image processing unit is used to carry out brightness uniformity detection to surface image, and judges whether picture brightness is uniform；
If so, feedback correct information is to image acquisition units；If it is not, then calculating the coordinate information in brightness irregularities region；And according to
Coordinate information generates the position adjusting information of strip source；
Automatically controlled adjusting unit is additionally operable to generate the second Regulate signal according to position adjusting information；Second Regulate signal is used for
Indicating positions regulating mechanism adjusts the position of strip source；
It is aobvious that image acquisition units are additionally operable to the control camera shooting after the correct information for receiving image processing unit feedback
The surface image of display screen；Image processing unit is additionally operable to carry out defects detection to the surface image that image acquisition units obtain, and obtains
To the number and the corresponding coordinate position of each defect of surface defect.
Preferably, above-mentioned surface damage defect detecting device, master controller further include display unit, the display unit
Surface image, defect number and the corresponding coordinate position of each defect for being generated to image processing unit carry out visualization
It is existing.
Preferably, above-mentioned surface damage defect detecting device, the shooting angle of camera are to be less than 45 degree more than 30 degree.
Preferably, above-mentioned surface damage defect detecting device, which is characterized in that further include passing through control with master controller
The connected transmission microscope carrier of cable, master controller further include transmission control unit；
Transmission microscope carrier is for carrying display screen to be detected, and being used for will display under the signal control of transmission control unit
Screen is transmitted to specified test position.
Preferably, above-mentioned surface damage defect detecting device, the first supporting mechanism include the first strut, first strut
It is vertically set on movable displacement platform, camera is fixed on the top of the first strut.
Preferably, above-mentioned surface damage defect detecting device, the first supporting mechanism further include angular adjustment adapter and
Adapting rod；
One end of adapting rod is fixed on by angular adjustment adapter on the first strut, and the other end is for placing camera；Angle
Degree adjusting switchover part is for being finely adjusted the shooting angle of camera.
Preferably, above-mentioned surface damage defect detecting device, the second supporting mechanism include the second strut, second strut
It is vertically set on movable displacement platform, strip source is arranged on the top of the second strut.
Other side according to the invention provides a kind of detection method of surface flaw shot based on side view camera,
Include the following steps：
S1：Camera and strip source are placed on to the same side of display screen to be measured；
S2：Obtain the parameter information of display screen and camera lens to be measured, the parameter information includes display screen to be measured
Size, the target surface size of camera and lens focus；
S3：The operating distance of camera and display screen center is calculated according to the parameter information；And according to operating distance
With the shooting angle of setting, the height of camera is calculated and at a distance from display screen side；
S4：The first Regulate signal is generated according to the height of camera and at a distance from display screen side, according to described first
Regulate signal adjusts camera position, so that the real time position of camera matches with the location information in step S3；
S5：It generates acquisition signal and obtains the exterior view for the display screen that camera is shot under the instruction of the acquisition signal
Picture；
S6：The brightness uniformity of the surface image is detected, and judges whether picture brightness is uniform；If so,
Correct information is generated, and enters step S8；If it is not, then calculating the coordinate information in brightness irregularities region；And believed according to the coordinate
Breath generates the position adjusting information of strip source；
S7：The second Regulate signal is generated according to the position adjusting information；Bar shaped is adjusted according to second Regulate signal
The position of light source executes step S5~S6, until the brightness uniformity of the display screen surface image of camera shooting；
S8：The surface image of display screen is acquired according to the correct information and carries out defects detection, obtains surface defect
Number and corresponding co-ordinate position information.
Preferably, above-mentioned surface damage defect inspection method, it is further comprising the steps of：
S9：Visualization presentation is carried out to surface image, defect number and the corresponding coordinate position of each defect；
S10：Next piece of display screen is transmitted to designated position, step S2~S9 is repeated and defects detection is carried out to it.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect：
(1) surface damage defect detecting device and method provided by the invention based on the shooting of side view camera, are based on bar shaped
Light source output optical field characteristics using a strip source as polishing light source, and exist shooting camera and strip source setting
The same side of display screen can make defect with higher to avoid the non-uniform situation of camera shooting picture caused by multiple light sources
Contrast be imaged in the shooting picture of camera, the accuracy of defects detection can be improved；
(2) surface damage defect detecting device and method provided by the invention based on the shooting of side view camera, pass through center
Signal interaction between controller and movable displacement platform and camera realizes the position to camera and light source according to the size of display screen
It sets and automatically adjusts, degree of regulation higher and saving human resources avoid the imaging effect for generating certain display screens poor, in turn
The case where influencing defects detection effect, this detection device is made to can be applied to the defects detection of different size display screens；
(3) surface damage defect detecting device and method provided by the invention based on the shooting of side view camera, in display screen
Top can retain more spatial margins, for setting up other for detecting the camera of non-surface damage type defect, phase
Than existing detection device, quantity of light source used is less, reduces the complexity and cost of mechanism.
Description of the drawings
Fig. 1 is the structural schematic diagram of existing defect detecting device；
Fig. 2 is the surface damage defect detecting device provided in an embodiment of the present invention shot based on side view camera and method
Structural schematic diagram；
Fig. 3 is the logic diagram of master controller provided in an embodiment of the present invention；
Fig. 4 is the light path principle figure of surface scratch class defects detection provided in an embodiment of the present invention；
Fig. 5 is the light path principle figure of surface particles class defects detection provided in an embodiment of the present invention；
Fig. 6 is that the flow of the surface damage defect inspection method provided in an embodiment of the present invention shot based on side view camera is shown
It is intended to；
In all the appended drawings, same reference numeral indicates identical technical characteristic, specially：1- cameras, 2- strip lights
Source, 3- activity displacement platforms, the first supporting mechanisms of 4-, the first struts of 41-, 42- angular adjustment adapters, 43- adapting rods, 5- second
Supporting mechanism, 6- master controllers, 7- display screens, 8- transmit microscope carrier.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
It does not constitute a conflict with each other and can be combined with each other.
Fig. 2 is the surface damage defect detecting device provided in an embodiment of the present invention shot based on side view camera and method
Structural schematic diagram；As shown in Fig. 2, the surface damage defect detecting device includes camera 1 (band camera lens), strip source 2, activity bit
Moving stage 3, the first supporting mechanism 4, the second supporting mechanism 5 and master controller 6；Camera 1 and movable displacement platform 3 pass through control line
Cable is connected with master controller 6；
Movable displacement platform 3 is arranged in the side of display screen 7, and the first supporting mechanism 4 and the second supporting mechanism 5 are arranged at work
On dynamic displacement platform 3；The Regulate signal that movable displacement platform 3 can be sent out according to master controller 6 controls 4 He of the first supporting mechanism respectively
Second supporting mechanism 5 is moved；
Camera 1 is arranged on the first supporting mechanism 4, adjusts the height of camera 1 by the first supporting mechanism 4, camera 1 is arrived and shown
The shooting angle and camera 1 at 7 center of display screen are at a distance from 7 side of display screen；
Strip source 2 is placed on the second supporting mechanism 5, and strip source 2 and display screen are adjusted by the second supporting mechanism 5
7 distance and height；
Fig. 3 is the logic diagram of master controller provided in this embodiment, as shown in figure 3, the master controller 6 includes ginseng
Number setting unit, computing unit, automatically controlled adjusting unit, image acquisition units, image processing unit and display unit；
Wherein, parameter set unit is used to obtain the parameter information of 1 camera lens of display screen 7 to be measured and camera, including to be measured
The size of display screen 7, the target surface size of camera 1 and lens focus；
Camera 1 and display screen 7 is calculated in the above-mentioned parameter information that computing unit is used to be obtained according to parameter set unit
The operating distance at center；Calculation formula is as follows：
WD=f (1+L/l) (1)
Wherein：WD is the operating distance of camera 1 and 7 center of display screen；
F is the lens focus of camera；
L is the length of display screen；
L is camera target surface length；
And according to the shooting angle of operating distance and setting, by trigonometric function calculate camera 1 height and with display
Shield the distance of 7 sides；It is to be herein pointed out in order to ensure that camera 1 takes the whole image of display screen 7 to be measured and makes figure
Picture edge needs the real work distance of camera 1 being set to be slightly greater than the operating distance calculated there are surplus, generally will
Real work distance is set as 1.1 times of evaluation work distance, and according to real work distance calculate camera 1 height and with it is aobvious
The distance of 7 side of display screen；
The shooting angle of camera 1 is the angle of the axis and display screen 7 of 1 camera lens of camera, in order to ensure that surface defect can be with
Higher contrast is imaged in the shooting picture of camera 1, needs the shooting angle of camera 1 being arranged between 30 ° to 45 °.
The automatically controlled unit that adjusts is used to generate the first Regulate signal according to the camera location information that computing unit generates, this first
Regulate signal is used to indicate the first supporting mechanism 4 of control of movable displacement platform 3 and is moved, so that the position of camera 1 is single with calculating
The location information that member generates matches；
After 1 position of camera is fixed, adjusting the focus function of camera lens enables camera 1 to focus 7 central sharp of display screen, adjusts
The aperture of camera lens is saved to minimum, and adjusts the time for exposure of camera so that the average brightness of shooting picture is about 100；
Image acquisition units are for generating acquisition signal and obtaining the display that camera 1 is shot under the instruction of the acquisition signal
The surface image of screen 7；
The surface image that image processing unit is used to obtain image acquisition units is handled, and judges that picture brightness is
It is no uniform；If so, feedback correct information is to image acquisition units；If it is not, then calculating the coordinate information in brightness irregularities region；
And the position adjusting information of strip source 2 is generated according to the coordinate information；
Specifically, the surface image of display screen 7 is divided into several regions by image processing unit, each area is calculated separately
The brightness value in domain, and the average brightness value of the brightness value gauging surface image according to each region；When strip source 2 be irradiated to it is aobvious
When 7 surface of display screen, if 7 surface brightness of display screen is uneven, the average brightness in each region in the surface image that camera 1 is shot
Value has very big difference；Image processing unit calculates separately the brightness value in each region and the deviation of average brightness value, if a certain area
When the absolute value of the bias in domain is more than the luminance deviation threshold value of setting, then judge that the regional luminance is uneven, and calculate brightness disproportionation
The coordinate information in even region；The region division number of surface image is more, and the area in each region is smaller, then result of calculation is got over
Accurately, the processing time of image processing unit is longer；Result accuracy and processing speed in order to balance, the present embodiment are selected table
Face image is divided into 9 or 16 regions.
The automatically controlled unit that adjusts is used to generate the second Regulate signal according to the position adjusting information that image processing unit generates；It should
Second Regulate signal is used to indicate the second supporting mechanism 5 of control of movable displacement platform 3 and is moved, to adjust the position of strip source 2
It sets, until the picture brightness for 7 surface image of display screen that camera 1 is shot is uniform；
After image acquisition units receive the correct information of image processing unit feedback, control camera 1 shoots display screen 7
Surface image；Image processing unit carries out defects detection to the surface image that image acquisition units obtain, and obtains surface defect
Number and corresponding co-ordinate position information；
Specifically, the brightness on flawless display screen 7 everywhere is substantially uniform, be not in mutation on brightness value；When aobvious
When occurring the defects of cut or raised particle in display screen 7, fault location can increase sharply due to there is the reflection of light, brightness；
The surface image of display screen 7 as unit of pixel is divided into several pockets and carried out by image processing unit
Number, calculates separately the gray value of each pocket and the gray value of each pocket and adjacent thereto four fritters
The deviation of the gray value in region judges the area if some region of absolute value of the bias is more than the gray-scale deviation threshold value of setting
Domain existing defects；Absolute value of the bias is bigger, illustrates that surface defect is more serious.
Institute's precision to be achieved determines that the precision needed is higher, then to the number of the pocket of division according to testing result
The pocket marked off is more, and number of pixels is fewer shared by each pocket, and the processing time of image processing unit is longer.
Display unit is used to carry out visualization presentation to surface image, defect number and the corresponding coordinate position of each defect,
It is analyzed convenient for staff and finds out the reason of causing defect in time.
Further, surface damage defect detecting device and method provided in this embodiment based on the shooting of side view camera,
Further include the transmission microscope carrier 8 being connected by controlling cable with master controller 6, master controller 6 further includes transmission control unit；
The transmission microscope carrier 8 is used for for carrying display screen 7 to be detected under the signal control of transmission control unit 6
Display screen 7 is transmitted to specified test position；After the completion of the defects detection of lastblock display screen 7, the control of master controller 6 passes
It send microscope carrier that next piece of display screen 7 is transmitted to designated position, carries out defects detection successively.
Further, the first supporting mechanism 4 includes the first strut 41, and the first strut 41 is vertically set on movable displacement platform 3
On, camera 1 is fixed on the top of the first strut 41, and the shooting angle of camera 1 is made to be arranged between 30 ° to 45 °；
Further, the first supporting mechanism 4 further includes angular adjustment adapter 42 and adapting rod 43, one end of adapting rod 43
It is fixed on the first strut 41 by angular adjustment adapter 42, the other end is for placing camera 1；Angular adjustment adapter 42 is used
In keeping the shooting angle of camera 1 adjustable.
Further, the second supporting mechanism 5 includes the second strut, and the second strut is vertically set on movable displacement platform 3, item
Shape light source 2 is arranged on the top of the second strut.
Below in conjunction with the accompanying drawings to it is provided in this embodiment based on side view camera shooting surface damage defect detecting device and
The testing principle of method is described in detail.
1, strip source irradiate uniformity
Strip source is a kind of linear light source, and main light-emitting component therein is LED light source, several one words of LED light source row
It opens, when the spacing distance of adjacent LED light source meets certain condition, forms linear light source, but on section, strip source output
Light field expression formula can use LED light output light field to describe.
Ideal LED illuminator can be considered as a Lambertian point sources, and irradiation profile can use an approximate cosine condition
Formula indicates：
Wherein,
In formula, E indicates the light intensity for being tested display screen surface；
θ indicates the angle of the emergent ray and display screen surface of LED illuminator；
R indicates the air line distance of LED illuminator and display screen surface；
As can be seen that being tested the light intensity E of display screen surface and putting down for display screen to light source distance r from expression formula (1)
Side is inversely proportional；Distance r is bigger, and light intensity is smaller；Meanwhile light intensity E is related with the deflection θ of emergent ray；Wherein θ angles are bigger,
Light intensity E in this direction is smaller.
Therefore, it is horizontally arranged when strip source, the region remote apart from light source on tested display screen, surface and outgoing
The angle of light is small, and the angle of position close apart from light source on shielding, surface and emergent ray is big；It can by above-mentioned expression formula
To find out, the output light of the strip source of horizontal exit can be evenly radiated into tested display screen surface.
2, damage defect optical characteristics
The damage defect detection of display screen surface mainly includes the particle of cut and surface on screen, as shown in figure 4, working as quilt
When surveying display screen surface does not have cut or particle, due to mirror-reflection, the light for being radiated at display screen surface will be reflected
To the offside of strip source；
Camera is placed on above strip source, the surface image of display screen, this phase are shot with certain depression angle
The picture entirety that machine takes screen surfaces is partially dark；
Fig. 4 is the light path principle figure of surface scratch class defects detection provided in this embodiment；When there is cut in surface, or
When surface indentation damages, as shown in figure 4, in cut or dented damage region, the contact surface of light and display screen is no longer
Horizontal plane；The reflection law of light is followed, normal is also no longer vertically oriented, but in the vertical direction of fault location section；Therefore,
The light that strip source is sent out will be reflected back toward strip source side；At this point, the camera for being placed on strip source the same side will
The reflection light that can detect these defects forms powerful contrast on the picture of camera shooting with not having defective region, from
And show the defect at this.
Fig. 5 is the light path principle figure of surface particles class defects detection provided in an embodiment of the present invention；Similar, work as screen surfaces
When uneven there are the protrusion of particle or screen itself, as shown in figure 5, when the light that strip source is sent out is irradiated to fault location, light
Line will be reflected to the same side of light source；And do not having defective region, incident light that will be reflected to the other side of light source；
Therefore, in the image of camera shooting, the equal existing defects in the higher region of brightness in picture form high comparison with no fault location
Degree.
The present embodiment additionally provides a kind of detection method of surface flaw shot based on side view camera, as shown in fig. 6, including
Following steps：
S1：Camera 1 and strip source 2 are placed on to the same side of display screen 7 to be measured；
S2：Obtain the parameter information of 1 camera lens of display screen 7 to be measured and camera, including the size of display screen 7 to be measured is big
Small, camera 1 target surface size and lens focus；
S3：The operating distance of camera 1 and 7 center of display screen is calculated according to above-mentioned parameter information；And according to working distance
From the shooting angle with setting, the height of camera 1 is calculated by trigonometric function and at a distance from 7 side of display screen；In order to protect
Card surface defect can be imaged in the shooting picture of camera 1 with higher contrast, and the shooting angle for setting camera is arrived at 30 °
Between 45 °；
S4：The first Regulate signal is generated according to the height of camera 1 and at a distance from 7 side of display screen, according to this first
Regulate signal adjusts 1 position of camera, so that the real time position of camera 1 matches with the location information in step S2；
S5：After 1 position of camera is fixed, adjusting the focus function of camera lens enables camera 1 to 7 central sharp pair of display screen
Coke adjusts the aperture of camera lens to minimum, and adjusts the time for exposure of camera 1 so that the brightness value of shooting picture is moderate；
S6：It generates acquisition signal and obtains the exterior view for the display screen 7 that camera 1 is shot under the instruction of the acquisition signal
Picture；
S7：Above-mentioned surface image is handled, and judges whether picture brightness is uniform；If so, correct information is generated,
Enter step S9；If it is not, then calculating the coordinate information in brightness irregularities region；And strip source 2 is generated according to the coordinate information
Position adjusting information；
Specifically, the surface image of display screen 7 is divided into several regions, the brightness value in each region is calculated separately,
And the average brightness value of the brightness value gauging surface image according to each region；Calculate separately the brightness value in each region with it is average bright
The deviation of angle value judges the regional luminance not if some region of absolute value of the bias is more than the luminance deviation threshold value of setting
Uniformly, and the coordinate information in brightness irregularities region is calculated；
S8：The second Regulate signal is generated according to above-mentioned position adjusting information；Strip light is adjusted according to second Regulate signal
The position in source 2 executes step S6~S7, until the picture brightness for 7 surface image of display screen that camera 1 is shot is uniform；
S9：The surface image of display screen 7 is acquired according to the correct information control camera 1 generated in step S7 and carries out defect
Detection, obtains the number of surface defect and corresponding co-ordinate position information；
Specifically, the surface image of display screen 7 is divided into several pockets as unit of pixel and is numbered,
Calculate separately the gray value of each pocket and the gray value of each pocket and adjacent thereto four pockets
The deviation of gray value judges that the region exists if some region of absolute value of the bias is more than the gray-scale deviation threshold value of setting
Defect；Absolute value of the bias is bigger, illustrates that surface defect is more serious.
S10：Visualization presentation is carried out to surface image, defect number and the corresponding coordinate position of each defect；
S11：Next piece of display screen is transmitted to designated position, step S2~S10 is repeated and defects detection is carried out to it.
Compared to existing defect detecting device, the surface damage defect inspection provided by the invention based on the shooting of side view camera
Device and method is surveyed, strip source output light field characteristic is based on, using a strip source as polishing light source, and shooting
Camera and strip source are arranged in the same side of display screen, can be uneven to avoid the camera shooting picture caused by multiple light sources
The case where, so that defect is imaged in the shooting picture of camera with higher contrast, the accuracy of defects detection can be improved；It is logical
The signal interaction crossed between master controller and movable displacement platform and camera realizes the size according to display screen to camera and light
The position in source automatically adjusts, and degree of regulation higher and saving human resources avoid the imaging effect for generating certain display screens
Difference, and then the case where influence defects detection effect, this detection device is made to can be applied to the defects detection of different size display screens.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of surface damage defect detecting device based on the shooting of side view camera, which is characterized in that including camera, strip light
Source, position adjusting mechanism and master controller；The camera and position adjusting mechanism pass through controlling cable and master controller phase
Even；
The strip source and camera are arranged on the position adjusting mechanism of the side of display screen to be measured；Camera and strip light
Source is located at the same side of display screen, and has the shooting angle of setting between camera and display screen；
The master controller according to the parameter information of display screen to be measured and camera lens generate camera location information, and according to
The location information generates the first Regulate signal；The position adjusting mechanism adjusts phase seat in the plane according to first Regulate signal
It sets, so that the location information that the position of camera is generated with master controller matches；
The brightness uniformity that the master controller is additionally operable to the surface image of the display screen acquired to camera is detected, and is calculated
The coordinate information in brightness irregularities region simultaneously generates the second Regulate signal according to the coordinate information；The position adjusting mechanism root
The position of strip source is adjusted according to second Regulate signal, until the picture brightness of the display screen surface image of camera shooting is equal
It is even；And the surface image of the display screen for acquire to camera carries out defects detection, obtains the number of surface defect and each scarce
Fall into corresponding coordinate position.
2. surface damage defect detecting device as described in claim 1, which is characterized in that the position adjusting mechanism includes living
Displacement platform is moved, and the first supporting mechanism and the second supporting mechanism being set up on the movable displacement platform；
The activity displacement platform controls first supporting mechanism according to the first Regulate signal that master controller is sent out and moves, with
Adjust the position for the camera being arranged on the first supporting mechanism；And institute is controlled according to the second Regulate signal that master controller is sent out
The movement of the second supporting mechanism is stated, to adjust the position for the strip source being arranged on the second supporting mechanism.
3. surface damage defect detecting device as described in claim 1, which is characterized in that the master controller includes parameter
Setting unit, computing unit, automatically controlled adjusting unit, image acquisition units and image processing unit；
The parameter set unit is used to obtain the parameter information of display screen and camera lens to be measured, and the parameter information includes waiting for
The size of the display screen of survey, the target surface size of camera and lens focus；
The computing unit is used to be calculated the operating distance of camera and display screen center according to the parameter information；And it is used for
According to the shooting angle of the operating distance and setting, the height of camera is calculated and at a distance from display screen side；
The automatically controlled unit that adjusts is used to generate the first adjusting according to the height of camera and with the range information of display screen side
Signal, first Regulate signal are used to indicate position adjusting mechanism adjustment camera position；
Described image collecting unit be used for generates acquisition signal and obtain camera it is described acquisition signal instruction under shoot show
The surface image of display screen；
Described image processing unit is used to carry out brightness uniformity detection to the surface image, and judges whether picture brightness is equal
It is even；If so, feedback correct information is to image acquisition units；If it is not, then calculating the coordinate information in brightness irregularities region；And root
The position adjusting information of strip source is generated according to the coordinate information；
The automatically controlled adjusting unit is additionally operable to generate the second Regulate signal according to the position adjusting information；Described second adjusts letter
Number it is used to indicate the position of position adjusting mechanism adjustment strip source；
It is aobvious that described image collecting unit is additionally operable to the control camera shooting after the correct information for receiving image processing unit feedback
The surface image of display screen；Described image processing unit is additionally operable to carry out defect inspection to the surface image that image acquisition units obtain
It surveys, obtains the number and the corresponding coordinate position of each defect of surface defect.
4. surface damage defect detecting device as claimed in claim 3, which is characterized in that the master controller further includes showing
Show unit, surface image, defect number and the corresponding seat of each defect that the display unit is used to generate image processing unit
Cursor position carries out visualization presentation.
5. the surface damage defect detecting device as described in claim 1 or 3, which is characterized in that the shooting angle be more than
30 degree are less than 45 degree.
6. surface damage defect detecting device as described in claim 3 or 4, which is characterized in that further include and master controller
The transmission microscope carrier being connected by controlling cable, the master controller further include transmission control unit；
The transmission microscope carrier is for carrying display screen to be detected, and being used for will under the signal control of the transmission control unit
Display screen is transmitted to specified test position.
7. surface damage defect detecting device as claimed in claim 2, which is characterized in that first supporting mechanism includes the
One strut, first strut are vertically set on movable displacement platform, and camera is fixed on the top of the first strut；
Second supporting mechanism includes the second strut being vertically set on movable displacement platform, and strip source setting is described the
The top of two struts.
8. surface damage defect detecting device as claimed in claim 7, which is characterized in that first supporting mechanism further includes
Angular adjustment adapter and adapting rod；
One end of the adapting rod is fixed on by the angular adjustment adapter on the first strut, and the other end is for placing phase
Machine；The angular adjustment adapter is for being finely adjusted the shooting angle of camera.
9. a kind of detection method of surface flaw based on the shooting of side view camera, which is characterized in that include the following steps：
S1：Camera and strip source are placed on to the same side of display screen to be measured；
S2：The parameter information of display screen and camera lens to be measured is obtained, the parameter information includes the size of display screen to be measured
Size, the target surface size of camera and lens focus；
S3：The operating distance of camera and display screen center is calculated according to the parameter information；And it according to operating distance and sets
Fixed shooting angle calculates the height of camera and at a distance from display screen side；
S4：The first Regulate signal is generated according to the height of camera and at a distance from display screen side, is adjusted according to described first
Signal adjusts camera position, so that the real time position of camera matches with the location information in step S3；
S5：It generates acquisition signal and obtains the surface image for the display screen that camera is shot under the instruction of the acquisition signal；
S6：The brightness uniformity of the surface image is detected, and judges whether picture brightness is uniform；If so, generating
Correct information, and enter step S8；If it is not, then calculating the coordinate information in brightness irregularities region；And it is given birth to according to the coordinate information
It is in strip the position adjusting information of light source；
S7：The second Regulate signal is generated according to the position adjusting information；Strip source is adjusted according to second Regulate signal
Position, execute step S5~S6, until camera shooting display screen surface image brightness uniformity；
S8：The surface image of display screen is acquired according to the correct information and carries out defects detection, obtains the number of surface defect
And corresponding co-ordinate position information.
10. surface damage defect inspection method as claimed in claim 9, which is characterized in that further comprising the steps of：
S9：Visualization presentation is carried out to surface image, defect number and the corresponding coordinate position of each defect；
S10：Next piece of display screen is transmitted to designated position, step S2~S9 is repeated and defects detection is carried out to it.
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