CN110220916A - A kind of backlight pressing mold defect inspection method and system - Google Patents
A kind of backlight pressing mold defect inspection method and system Download PDFInfo
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- CN110220916A CN110220916A CN201910425764.8A CN201910425764A CN110220916A CN 110220916 A CN110220916 A CN 110220916A CN 201910425764 A CN201910425764 A CN 201910425764A CN 110220916 A CN110220916 A CN 110220916A
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- 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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Abstract
The invention discloses a kind of backlight pressing mold defect inspection method and systems, are related to optical defect detection technique field；Detection method includes the following steps: S1 for this: the pressure mode of device for exerting and the capture frame per second of camera is arranged, makes the pressure frequency adaptation of the capture frame per second and device for exerting；S2: the device for exerting is controlled according to the pressure mode and pressure frequency and covers backlight to be measured, while being continuously shot multiple backlight pictures in device for exerting traveling process by the camera；S3: defects detection is carried out to multiple described backlight pictures, obtains the pressing mold defect information on backlight to be measured；The present invention attaches backlight film layer closely to show pressing mold defect by the method that device for exerting covers；And using the effect of the high continuous capture of frame per second camera, takes pictures to the backlight area after covering, complete capture before the defect for covering generation does not completely disappear；System structure is more simple, pressing mold defects detection better effect.
Description
Technical field
The invention belongs to optical defect detection technique fields, lack more particularly, to a kind of backlight pressing mold based on AOI
Fall into detection method and system.
Background technique
In the defects detection of panel backlit source, it is all kinds of not that there is foreign matter, bubble, scuffing, soft flocks and pressing bright spots etc.
The defect of same type leads to the defect for occurring similar in final LCD panel, this directly affect the final quality of LCD panel and
The output result of Yield Grade；Therefore, carrying out detection to the defect for being possible to occur on backlight panel at the initial stage of LCD processing procedure is
Vital, surface defects detection result directly affects the control of consumer product yield.It is different in above-mentioned several defects
Defect can be apparent in picture directly by facing camera capture shooting by object, bubble, scuffing, soft flocks these types defect
On.But for a kind of last pressing fleck defect, this defect is more special, since the backlight in LCD display is with more
Layer structure, for some little particle dusts or foreign matter of the layer that is clipped in the middle, when these particles or foreign matter are not attached to any film layer
When, it will not be in the picture of camera capture and display.Only when manually pressing tie layer, defect can be just shown as in backlight
One bright spot, therefore press fleck defect and be also referred to as pressing mold defect.
For the detection method of pressing mold defect, a kind of method of mainstream is to utilize the method for vacuum suction by each film layer at present
Between air extraction so that being fitted closely between film layer and film layer；When, there are when particle foreign matter, these defects will between film layer
It can show.It is the schematic diagram of vacuum suction pressing mold detection method shown in Fig. 1；But this defect inspection method exist with
Lower disadvantage: first is that the film layer number of plies due to backlight panel is more, vacuum suction is difficult to be fully drawn out each layer of sky in realization
Gas, therefore cause defects detection ineffective；Second is that equipment mechanism used by vacuum suction is complex, due to needing to utilize
The mode vacuumized, it is therefore desirable to using labyrinths such as motor, compressors.
Summary of the invention
For at least one defect or Improvement requirement of the prior art, the present invention provides a kind of inspections of backlight pressing mold defect
Method and system are surveyed, is covered based on device for exerting with the high continuous capture of frame per second camera and detects backlight pressing mold defect, utilize pressure
Device covers backlight so that each film layer of backlight closely attaches, and device for exerting covers rolling while utilizing the continuous capture of the small camera of high speed,
The region that shooting device for exerting covers before the defect shown after covering does not disappear, then carries out pressing mold defects detection；Its mesh
Be solve the problems, such as that defects detection existing for existing pressing mold defect inspection method is ineffective, hardware configuration is complicated.
To achieve the above object, according to one aspect of the present invention, a kind of backlight pressing mold defect inspection method is provided,
The following steps are included:
S1: the pressure mode of device for exerting and the capture frame per second of camera are set, the capture frame per second and device for exerting are made
Pressure frequency adaptation；
S2: the device for exerting is controlled according to the pressure mode and pressure frequency and covers backlight to be measured, is passed through simultaneously
The camera is continuously shot multiple backlight pictures in device for exerting traveling process；
S3: defects detection is carried out to multiple described backlight pictures, obtains the pressing mold defect information on backlight to be measured.
Preferably, above-mentioned backlight pressing mold defect inspection method, step S1 include following sub-step:
S110: device for exerting is calculated according to the length L of the travel speed V of preset device for exerting and backlight to be measured and is passed through
The time t, t=L/V of entire backlight to be measured；
S120: according to the capture frame per second of capture number N and the time t setting camera of preset single backlight to be measured
N/t。
Preferably, above-mentioned backlight pressing mold defect inspection method, step S1 include following sub-step:
S111: pressure dress is calculated according to the central angle θ of the traveling angular velocity omega of preset device for exerting and backlight to be measured
Set the time t, t=θ/ω by entire backlight to be measured；
S121: according to the capture frame per second of capture number N and the time t setting camera of preset single backlight to be measured
N/t。
Preferably, above-mentioned backlight pressing mold defect inspection method, step S1 include following sub-step:
S112: according to the area S of backlight to be measured1, device for exerting and backlight contact surface to be measured sectional area S2Calculating is applied
Press frequency n, n=S1/S2；The value of the pressure number follows the rule that rounds up；
S122: the pressure sequence and pressure frequency f of device for exerting are set, and according to the pressure frequency f and pressure frequency n
Device for exerting is calculated by the time t, t=n/f of entire backlight to be measured；
S132: according to the capture frame per second of capture number N and the time t setting camera of preset single backlight to be measured
N/t。
Preferably, above-mentioned backlight pressing mold defect inspection method, further comprising the steps of before step S1:
The operating distance WD of camera is calculated according to the length L of the camera parameter of selection and backlight to be measured；WD=f (1+L/
L), wherein f is the focal length of camera lens, and l is the length of camera chip.
Preferably, above-mentioned backlight pressing mold defect inspection method, further comprising the steps of in step S3:
Each panel picture is cut to N number of sub-pictures respectively according to the direction of travel of device for exerting or pressure sequence,
It successively extracts i-th of sub-pictures in i-th panel picture and the N sub-pictures is sequentially synthesized into a spliced map
Piece carries out defects detection to the splicing picture；Wherein, i=1~N.
Preferably, in above-mentioned backlight pressing mold defect inspection method, capture number N >=10 of single backlight to be measured.
Other side according to the invention, additionally provides a kind of backlight pressing mold defect detecting system, including camera and
Device for exerting；
The device for exerting is used to cover backlight to be measured according to preset pressure mode and pressure frequency；
The camera is used to shoot device for exerting and covers multiple backlight pictures during backlight to be measured；
Further include processor, memory and storage in the memory and the calculating that can be run in the processor
The step of machine program, the computer program is performed the control device for exerting and the camera realization above method.
Preferably, above-mentioned backlight pressing mold defect detecting system, processor include computing unit and image processing unit；
The computing unit is used to calculate the capture frame per second of camera according to the pressure mode of device for exerting, makes the capture frame
The pressure frequency adaptation of rate and device for exerting；
The device for exerting that described image processing unit is used to obtain camera acquisition covers multiple during backlight to be measured
Backlight picture simultaneously carries out defects detection to the panel picture, obtains the pressing mold defect information on panel.
Preferably, above-mentioned backlight pressing mold defect detecting system, processor further include concatenation unit；
The concatenation unit is used for direction of travel or the pressure sequence according to device for exerting respectively by each panel picture
N number of sub-pictures are cut to, i-th of sub-pictures in i-th panel picture are successively extracted and sequentially close the N sub-pictures
As a splicing picture；The splicing picture is provided to image processing unit and carries out defects detection；Wherein, i=1~N.
Preferably, above-mentioned backlight pressing mold defect detecting system, device for exerting is using roller or presses compression mould.
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) backlight pressing mold defect inspection method provided by the invention and system, are made by the method that device for exerting covers
Backlight film layer closely attaches, and shows pressing mold defect；And using the effect of the high continuous capture of frame per second camera, the back that roller is covered
Light region is taken pictures, and completes capture before the defect for covering generation does not completely disappear；The method knot of this method than before
Structure is more simple, pressing mold defects detection better effect；
(2) backlight pressing mold defect inspection method provided by the invention and system, according to the size and phase of backlight to be measured
Machine parameter adjusts the operating distance between camera and backlight to be measured, it is ensured that the photo of camera shooting is imitated with good imaging
Fruit；It is phase according to the pressure mode and frequency of device for exerting, backlight Source size to be measured and to the capture number of single backlight
Optimal capture frame per second is arranged in machine, it is ensured that camera can take backlight before the pressing mold defect that roller covers appearance disappears
On pressing mold defect, improve subsequent defective detection process accuracy rate；
(3) backlight pressing mold defect inspection method provided by the invention and system, each back that camera capture is obtained
Effectively covering extracted region and come out and synthesize a splicing picture in light source picture, to splicing picture progress fault location
Reason, the picture number of required processing is few, is conducive to the speed and efficiency that improve subsequent defects detection processing.
Detailed description of the invention
Fig. 1 is the schematic diagram of vacuum suction pressing mold detection method；
Fig. 2 is the flow chart for the backlight pressing mold defect inspection method that the embodiment of the present invention one provides；
Fig. 3 is the flow chart of backlight pressing mold defect inspection method provided by Embodiment 2 of the present invention；
Fig. 4 is the flow chart for the backlight pressing mold defect inspection method that the embodiment of the present invention three provides；
Fig. 5 is the structural schematic diagram for the backlight pressing mold defect detecting system that the embodiment of the present invention four provides；
Fig. 6 is the logic diagram of fpga chip provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention 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
Not constituting a conflict with each other can be combined with each other.
Embodiment one
Fig. 2 is the flow chart for the backlight pressing mold defect inspection method that the embodiment of the present invention one provides；The detection method institute
For test object be mainly polygon backlight, the device for exerting used is controlled by press machine and is rolled for roller and press machine
Cylinder rolls and covers backlight to be measured；As shown in Fig. 2, being somebody's turn to do, detection method includes the following steps:
S1: the travel speed of roller and the capture number to single backlight to be measured are set, according to the travel speed, taken
As number and backlight Source size to be measured calculate the capture frame per second of camera；Specifically include following sub-step:
S11: it is calculated according to the camera parameter of selection and backlight size to be measured and adjusts the operating distance WD of camera；WD=
F (1+L/l), wherein f is the focal length for the camera lens selected, and L is backlight length, and l is the length of camera chip；
S12: the time t, t=that roller passes through entire backlight panel are calculated according to the travel speed V of roller and backlight length L
L/V；Roller applies pressure to backlight panel during rolling on backlight panel, shows the pressing mold defect on backlight panel
Out；Firstly the need of the travel speed V of reasonable setting roller, travel speed V is excessive, will lead to because roller covers the pressure of appearance
Mould defect disappears before the non-capture of camera；Travel speed V is too small, then roller is corresponding by the time of entire backlight panel
Increase, defect inspection process is caused to expend overlong time；
S13: according to the capture frame per second of capture number N and the time t setting camera of preset single backlight to be measured
N/t FPS；Wherein, the value of N is bigger, and the capture time of camera is shorter；But N value is bigger, the frame per second of camera is higher, camera
Cost is also higher；Preferably, N >=10.
S2: control roller covers backlight panel to be measured according to preset travel speed V, while being continuously shot rolling by camera
N backlight panel pictures in cylinder traveling process；
S3: defects detection is carried out to above-mentioned backlight panel picture, obtains the pressing mold defect information on backlight panel.
It can just be showed since the pressing mold defect on backlight panel needs closely to attach between film layer, the present embodiment utilizes
Roller covers backlight panel, the close attaching state between film layer is formed, so that pressing mold defect be made to display；Roller covers together
When, using the high continuous capture of frame per second camera, the region that roller rolls across is taken before the defect for covering generation does not completely disappear
Interior pressing mold defect；It is simple that roller covers structure, whole time-consuming short.
Since the N of camera capture opens the complete panel picture of each Zhang Junwei in panel pictures, and the roller for including
Image；But the region that only roller covered on the picture is effective coverage, contains the pressing mold defect information on panel；If
Defect processing directly is carried out to each panel picture, undoubtedly will increase the workload of defect processing, extends the defects detection time；
Therefore, in order to improve the efficiency of defects detection, it is also preferable to include following steps before step S3 for the present embodiment:
Each panel picture is cut to N number of sub-pictures respectively along roller direction of travel, successively extracts i-th panel
The N sub-pictures are simultaneously sequentially synthesized a splicing picture by i-th of sub-pictures in picture, to splicing picture progress
Defects detection；Wherein, i=1~N.The present embodiment cuts each panel picture and is extracted and therein effectively covered
Region synthesizes a splicing picture comprising effectively covering the sub-pictures in region for N, carries out fault location to the splicing picture
Reason is conducive to the speed and efficiency that improve subsequent defects detection processing.
Embodiment two
Fig. 3 is the flow chart for the backlight pressing mold defect inspection method that the embodiment of the present invention one provides；The detection method institute
For test object be mainly round or arc backlight, the device for exerting used is roller and press machine, by press machine band
Dynamic roller circles to cover backlight to be measured；As shown in figure 3, being somebody's turn to do, detection method includes the following steps:
S1: the traveling angular velocity omega of roller and the capture number to single backlight to be measured are set, according to the angle of travel
The central angle θ of speed omega, capture number and backlight to be measured calculates the capture frame per second of camera；Specifically include following sub-step:
S11: it is calculated according to the camera parameter of selection and backlight size to be measured and adjusts the operating distance WD of camera；WD=
F (1+L/l), wherein f is the focal length for the camera lens selected, and L is the length of backlight most strong point, and l is the length of camera chip；
S12: according to the central angle θ of the traveling angular velocity omega of roller and backlight to be measured calculate device for exerting cover entirely to
Time t, t=θ/ω needed for surveying backlight；Also need the traveling angular velocity omega that roller is rationally set, the traveling angular velocity omega
It is excessive, it will lead to because the pressing mold defect that roller covers appearance disappears before the non-capture of camera；The traveling angular velocity omega is too small,
Then roller accordingly increases by the time of entire backlight panel, and defect inspection process is caused to expend overlong time；
S13: according to the capture frame per second of capture number N and the time t setting camera of preset single backlight to be measured
N/t FPS；Wherein, the value of N is bigger, and the capture time of camera is shorter；But N value is bigger, the frame per second of camera is higher, camera
Cost is also higher；Preferably, N >=10.
S2: control roller covers backlight panel to be measured according to preset traveling angular velocity omega, while continuously being clapped by camera
Take the photograph N backlight panel pictures in roller traveling process；
S3: defects detection is carried out to above-mentioned backlight panel picture, obtains the pressing mold defect information on backlight panel.
Due to the complete backlight panel picture of each Zhang Junwei in N panel pictures of camera capture, include in picture
Roller image；But the region that only roller covered on the picture is that effective coverage contains the pressing mold defect information on panel；
If directly carrying out defect processing to each panel picture, the workload of defect processing undoubtedly will increase, extend defects detection
Time；Therefore, in order to improve the efficiency of defects detection, it is also preferable to include following steps before step S3 for the present embodiment:
Each panel picture is cut to N number of sub-pictures respectively along roller direction of travel, successively extracts i-th panel
The N sub-pictures are simultaneously sequentially synthesized a splicing picture by i-th of sub-pictures in picture, to splicing picture progress
Defects detection；Wherein, i=1~N.The present embodiment cuts each panel picture and is extracted and therein effectively covered
Region synthesizes a splicing picture comprising effectively covering the sub-pictures in region for N, carries out fault location to the splicing picture
Reason is conducive to the speed and efficiency that improve subsequent defects detection processing.
Embodiment three
Fig. 4 is the flow chart for the backlight pressing mold defect inspection method that the embodiment of the present invention one provides；The detection method institute
For test object can be round or arc backlight, be also possible to polygon backlight；The device for exerting used for by
Compression mould and press machine are covered backlight to be measured by compression mould by press machine drive；As shown in figure 4, the detection method includes
Following steps:
S1: the pressure sequence, pressure frequency and the capture number to single backlight to be measured of compression mould are pressed in setting, according to
The pressure frequency, capture number, the area of backlight to be measured and the capture frame per second that camera is calculated by the sectional area of compression mould；Specifically
Including following sub-step:
S11: it is calculated according to the camera parameter of selection and backlight size to be measured and adjusts the operating distance WD of camera；WD=
F (1+L/l), wherein f is the focal length for the camera lens selected, and L is the length of backlight most strong point, and l is the length of camera chip；
S12: according to the area S of backlight to be measured1, by the sectional area S of compression mould and backlight contact surface to be measured2Calculating is applied
Press frequency n, n=S1/S2；
S13: the pressure sequence and pressure frequency f of device for exerting are set, and calculated according to pressure frequency f and pressure frequency n
Device for exerting passes through the time t, t=n/f of entire backlight to be measured；The pressure sequence of device for exerting can be according to the reality of user
Demand is set, for example, can successively press according to sequence from left to right for rectangular backlight, can also be incited somebody to action
The backlight cross division is multiple cells, sets the pressure sequence and pressure frequency f of whole cells；For round backlight
Its cross division can be four or more cells by source, set the pressure sequence and pressure frequency f of whole cells；
It should be noted that by the sectional area S of compression mould2Have to be larger than the area of individual unit lattice, it is ensured that can be complete by compression mould
Cover individual unit lattice；The value of pressure frequency f is affected to detection process, need to rationally be arranged；Pressure frequency f is excessive,
It will lead to and disappear before the non-capture of camera because of the pressing mold defect for covering appearance by compression mould；Pressure frequency f is too small, then presses
Compression mould accordingly increases by the time of entire backlight panel, and defect inspection process is caused to expend overlong time；
S14: according to the capture frame per second of capture number N and the time t setting camera of preset single backlight to be measured
N/t；Wherein, the value of N is bigger, and the capture time of camera is shorter；But N value is bigger, the frame per second of camera is higher, the cost of camera
Also higher；Preferably, N >=10.
S2: control covers backlight panel to be measured according to the pressure sequence and pressure frequency f of setting by compression mould, passes through simultaneously
Camera is continuously shot the N in roller traveling process backlight panel pictures；
S3: defects detection is carried out to above-mentioned backlight panel picture, obtains the pressing mold defect information on backlight panel.
Due to the complete backlight panel picture of each Zhang Junwei in N panel pictures of camera capture, include in picture
By the image of compression mould；But the region that only roller covered on the picture is that effective coverage contains the pressing mold defect on panel
Information；If directly carrying out defect processing to each panel picture, the workload of defect processing undoubtedly will increase, extend defect
Detection time；Therefore, in order to improve the efficiency of defects detection, it is also preferable to include following steps before step S3 for the present embodiment:
Each panel picture is cut to N number of sub-pictures respectively according to the pressure sequence by compression mould, is successively extracted
The N sub-pictures are simultaneously sequentially synthesized a splicing picture by i-th of sub-pictures in i-th panel picture, to the spelling
Map interlinking piece carries out defects detection；Wherein, i=1~N.The present embodiment cuts each panel picture and is extracted wherein
Effectively cover region, N is synthesized into a splicing picture comprising effectively covering the sub-pictures in region, to the splicing picture into
Row defect processing is conducive to the speed and efficiency that improve subsequent defects detection processing.
Example IV
The present embodiment additionally provides a kind of backlight pressing mold defect detecting system, including camera and device for exerting；The pressure
Device is used to cover backlight panel to be measured according to preset pressure mode and pressure frequency；Backlight panel is arranged in the camera
Surface, for shooting multiple backlight pictures during device for exerting covers backlight panel；The present embodiment is by taking roller as an example
It is illustrated, Fig. 5 is the structural schematic diagram of backlight pressing mold defect detecting system provided in this embodiment；The system further includes
Fpga chip, memory and the multiple computer programs being stored in the memory；Fig. 6 is provided in an embodiment of the present invention
The logic diagram of fpga chip, as shown in fig. 6, example has configuration unit, computing unit and image procossing list in the fpga chip
Multiple functional units such as member, above-mentioned computer program can run in the functional unit and control roller and camera realizes above-mentioned side
The step of method.
Wherein, configuration unit is used to obtain the pressure mode of externally input device for exerting, backlight panel size to be measured, right
The capture number of single backlight to be measured；
Computing unit is used to calculate the capture frame per second of camera according to the pressure mode of device for exerting, make the capture frame per second with
The pressure frequency adaptation of device for exerting；
When device for exerting is roller, and backlight to be measured is polygon backlight panel, the received pressure mode of configuration unit
Information is the travel speed V of roller；Computing unit is then calculated according to the length L of the travel speed V of roller and backlight to be measured and is rolled
Cylinder passes through the time t, t=L/V of entire backlight to be measured；Then according to the capture number N of preset single backlight to be measured and
The capture frame per second N/t of above-mentioned time t setting camera；
When device for exerting is roller, and backlight to be measured is round backlight panel, the received pressure mode of configuration unit is believed
Breath is the traveling angular velocity omega of roller；Computing unit is then according to the central angle θ of the traveling angular velocity omega of roller and backlight to be measured
Roller is calculated by the time t, t=θ/ω of entire backlight to be measured；Then according to the capture of preset single backlight to be measured
The capture frame per second N/t of number N and above-mentioned time t setting camera；
When device for exerting is by compression mould, when backlight to be measured is polygon or round backlight panel, configuration unit is received
Pressure mode information include press mold pressure sequence and pressure frequency f；Computing unit is first according to backlight to be measured
Area S1, device for exerting and backlight contact surface to be measured sectional area S2Calculate pressure frequency n, n=S1/S2；Then according to pressure
Frequency f and pressure frequency n calculate device for exerting by the time t, t=n/f of entire backlight to be measured；Further according to preset single
The capture frame per second N/t of the capture number N of backlight to be measured and above-mentioned time t setting camera.
Preferably, it is covering with before capture, computing unit is also used to camera parameter and backlight to be measured according to selection
The operating distance WD of panel size calculating camera；WD=f (1+L/l), wherein f is the focal length of camera lens, and L is backlight panel
Length, l are the length of camera chip；The operating distance of camera is adjusted according to calculated result, it is ensured that the imaging effect of camera is best.
The value of the capture number N of single backlight to be measured is bigger, and the capture time of camera is shorter；But N value is bigger, phase
The frame per second of machine is higher, and the cost of camera is also higher；Preferred N >=10 of the present embodiment.
Image processing unit is used to obtain the roller of camera acquisition or device for exerting cover it is more during backlight to be measured
It opens backlight picture and defects detection is carried out to backlight picture, obtain the pressing mold defect information on panel.
One as the present embodiment is preferred, which further includes concatenation unit；The concatenation unit is used for along roller
Direction of travel or by compression mould pressure sequence each panel picture is cut to N number of sub-pictures respectively, successively extract
The N sub-pictures are simultaneously sequentially synthesized a splicing picture by i-th of sub-pictures in i-th panel picture；Spliced
After picture, which is supplied to image processing unit and carries out defects detection by concatenation unit；Wherein, i=1~N.This implementation
Example by effectively covering extracted region and come out and synthesize a splicing picture in each panel picture, to the splicing picture into
The picture number of row defect processing, required processing is few, is conducive to the speed and efficiency that improve subsequent defects detection processing.
In the above-described embodiments, the fpga chip of the Superficial Foreign Body defect Quick filter system may be replaced by others
Central processing unit (Central Processing Unit, CPU), general processor, digital signal processor (Digital
Signal Processing, DSP), specific integrated circuit (Application Specific Integrated Circuit,
ASIC), programmable system on chip (System-on-a-Programmable-Chip, SOPC) or other programmable logic devices
Part, discrete gate or transistor logic, discrete hardware components etc..
Compared to existing pressing mold defect inspection method, the present invention keeps backlight film layer tight by the method that device for exerting covers
It is closely connected attached, show pressing mold defect；And the backlight area that roller covers is carried out using the effect of the high continuous capture of frame per second camera
It takes pictures, completes capture before the defect for covering generation does not completely disappear；The method structure of this method than before is more simple,
Pressing mold defects detection better effect.
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, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of backlight pressing mold defect inspection method, which comprises the following steps:
S1: being arranged the pressure mode of device for exerting and the capture frame per second of camera, makes applying for the capture frame per second and device for exerting
Press frequency adaptation；
S2: the device for exerting is controlled according to the pressure mode and pressure frequency and covers backlight to be measured, while by described
Camera is continuously shot multiple backlight pictures in device for exerting traveling process；
S3: defects detection is carried out to multiple described backlight pictures, obtains the pressing mold defect information on backlight to be measured.
2. backlight pressing mold defect inspection method as described in claim 1, which is characterized in that step S1 includes following sub-step
It is rapid:
S110: device for exerting is calculated by entire according to the length L of the travel speed V of preset device for exerting and backlight to be measured
The time t, t=L/V of backlight to be measured；
S120: according to the capture frame per second N/t of capture number N and the time t setting camera of preset single backlight to be measured.
3. backlight pressing mold defect inspection method as described in claim 1, which is characterized in that step S1 includes following sub-step
It is rapid:
S111: device for exerting warp is calculated according to the central angle θ of the traveling angular velocity omega of preset device for exerting and backlight to be measured
Cross the time t, t=θ/ω of entire backlight to be measured；
S121: according to the capture frame per second N/t of capture number N and the time t setting camera of preset single backlight to be measured.
4. backlight pressing mold defect inspection method as described in claim 1, which is characterized in that step S1 includes following sub-step
It is rapid:
S112: according to the area S of backlight to be measured1, device for exerting and backlight contact surface to be measured sectional area S2Calculate pressure time
Number n, n=S1/S2；
S122: the pressure sequence and pressure frequency f of device for exerting are set, and calculated according to the pressure frequency f and pressure frequency n
Device for exerting passes through the time t, t=n/f of entire backlight to be measured；
S132: according to the capture frame per second N/t of capture number N and the time t setting camera of preset single backlight to be measured.
5. backlight pressing mold defect inspection method as described in claim 1, which is characterized in that further include following before step S1
Step:
The operating distance WD of camera is calculated according to the length L of the camera parameter of selection and backlight to be measured；WD=f (1+L/l),
In, f is the focal length of camera lens, and l is the length of camera chip.
6. backlight pressing mold defect inspection method as claimed in any one of claims 1 to 5, which is characterized in that in step S3 also
The following steps are included:
Each panel picture is cut to N number of sub-pictures respectively according to the direction of travel of device for exerting or pressure sequence, successively
It extracts i-th of sub-pictures in i-th panel picture and the N sub-pictures is sequentially synthesized into a splicing picture, it is right
The splicing picture carries out defects detection；Wherein, i=1~N.
7. a kind of backlight pressing mold defect detecting system, which is characterized in that including camera and device for exerting；
The device for exerting is used to cover backlight to be measured according to preset pressure mode and pressure frequency；
The camera is used to shoot device for exerting and covers multiple backlight pictures during backlight to be measured；
Further include processor, memory and storage in the memory and the computer journey that can be run in the processor
Sequence, the computer program is performed the control device for exerting and camera realizes any one of claim 1~6 the method
The step of.
8. backlight pressing mold defect detecting system as claimed in claim 7, which is characterized in that the processor includes calculating list
Member and image processing unit；
The computing unit is used to calculate the capture frame per second of camera according to the pressure mode of device for exerting, make the capture frame per second with
The pressure frequency adaptation of device for exerting；
The device for exerting that described image processing unit is used to obtain camera acquisition covers multiple backlights during backlight to be measured
Source picture simultaneously carries out defects detection to the panel picture, obtains the pressing mold defect information on panel.
9. backlight pressing mold defect detecting system as claimed in claim 8, which is characterized in that the processor further includes splicing
Unit；
The concatenation unit is used to respectively be cut each panel picture according to direction of travel or the pressure sequence of device for exerting
For N number of sub-pictures, successively extracts i-th of sub-pictures in i-th panel picture and sequentially synthesize the N sub-pictures
One splicing picture；The splicing picture is provided to described image processing unit and carries out defects detection；Wherein, i=1~N.
10. backlight pressing mold defect detecting system as claimed in claim 7, which is characterized in that the device for exerting is using rolling
Cylinder presses compression mould.
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Application publication date: 20190910 |