CN207503282U - Liquid crystal display defect based on binocular vision system distinguishes detection device with dust - Google Patents

Liquid crystal display defect based on binocular vision system distinguishes detection device with dust Download PDF

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Publication number
CN207503282U
CN207503282U CN201721501516.XU CN201721501516U CN207503282U CN 207503282 U CN207503282 U CN 207503282U CN 201721501516 U CN201721501516 U CN 201721501516U CN 207503282 U CN207503282 U CN 207503282U
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main phase
phase machine
lifting
side camera
camera
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姜涌
汪杰
邹伟金
魏斌
孙成
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Gaoshi Technology Suzhou Co ltd
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Huizhou Gaoshi Technology Co Ltd
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Abstract

The utility model discloses a kind of liquid crystal display defect based on binocular vision system and distinguishes detection device with dust.Detection device includes:One main phase machine, Duo Tai sides camera, circular orbit, a main phase machine lifting adjusting structure, the lifting of multiple side cameras and angle adjustment mechanism;One main phase machine is placed in the center of circular orbit, and Duo Tai sides camera is slidably mounted on circular orbit and is distributed around a main phase machine;One main phase machine lifting adjusting structure is corresponding with a main phase machine, and multiple side camera liftings and angle adjustment mechanism are corresponded respectively at Duo Tai sides camera;Main phase machine lifting adjusting structure driving main phase machine vertically lifts;Side camera lifting and the lifting of angle adjustment mechanism driving side camera or rotation, the vertically elevating movement of side camera, the rotation axis of side camera are parallel with horizontal plane.Detection device solves the problems, such as that foreign matter defect and surface dirt cannot be distinguished in automatic checkout equipment in current technology.

Description

Liquid crystal display defect based on binocular vision system distinguishes detection device with dust
Technical field
The present invention relates to technical field of vision detection, more particularly to a kind of liquid crystal display defect based on binocular vision system Detection device is distinguished with dust.
Background technology
LCD (Liquid Crystal Display) liquid crystal display typical case composition is from top to bottom followed successively by TP (Touch Panel, touch screen) glass, upper polaroid, colored filter, liquid crystal layer, TFT (ThinFilm Transistor, film crystal Pipe) substrate, down polaroid and backlight.With the development of LCD technology, it with high resolution, it is small, light-weight, without spoke Penetrate, panelized and it is low in energy consumption the features such as, rapidly become display market leading role, set from mobile phone to portable game machine, from industry Standby manual operation platform is to numerous areas such as bank self-aid apparatus ATM (Automatic Teller Machine), and LCD is without institute Do not exist.Therefore, particularly important is become for the quality testing of LCD liquid crystal displays.
The technological process and quality testing of LCD liquid crystal displays mainly include:Panel cuttings, patch, COG FOG, dispensing, group Backlight;Wherein main quality testing include panel cutting after, after patch and group backlight after lighting inspection and visual examination.
At present, the quality testing to the automatic lighting of each stage can have been realized in the prior art, still, in the prior art Automatic detection device can not realize the surface dirt that does not filter out when whether TP layers of foreign matter are detection.Especially after TP is bonded entirely In technique, due to introducing defect in the assembling process of technique, need to detect for the foreign matter among TP layers and liquid crystal layer, pass at present The differentiation mode of system makes surface dirt imaging be compared with internal real defect, still with increasing light source in liquid crystal layer surface TP layers of foreign matter can be also imaged under surface source of light, be difficult to differentiate between with dust, and TP foreign matter missing inspections are caused in detection process.Therefore to TP The detection of layer foreign matter is constantly in space state in LCD detection devices.
As shown in Figure 1, it is a kind of level schematic diagram of liquid crystal display 10.Liquid crystal display 10 include be bonded successively cover board 11, Upper polaroid 12, liquid crystal layer 13, down polaroid 14, backlight 15.Small items positioned at 11 surface of cover board are defined as surface ash Dirt 16, the small items between cover board 11 and upper polaroid 12 are defined as foreign matter defect 17.The origin cause of formation of foreign matter defect 17 is, Since liquid crystal module 10 is when being assembled in fitting cover board 11, the foreign matter between cover board 11 and upper polaroid 12 is fallen into, is in addition also had Sub-fraction is the foreign matter that 11 supplied materials of cover board is present in cover board.
Foreign matter defect 17 usually there will be missing inspection, and missing inspection reason is, when doing surface polishing most of foreign matter defect 17 It gets and is filtered out as dust, since surface dirt 16 and foreign matter defect 17 are only every layer transparent cover plate 11, the two is taken The basic indifference of feature, can not accurately distinguish.
Invention content
The purpose of the present invention is overcoming shortcoming of the prior art, a kind of liquid crystal based on binocular vision system is provided Shield defect and distinguish detection device with dust, it can not to foreign matter defect and surface dirt to solve automatic checkout equipment in current technology The problem of differentiation.
The purpose of the present invention is achieved through the following technical solutions:
A kind of detection device, including:One main phase machine, Duo Tai sides camera, circular orbit, a main phase machine rising-falling tone nodule Structure, the lifting of multiple side cameras and angle adjustment mechanism;
One main phase machine is placed in the center of the circular orbit, and the more side cameras are slidably mounted on described On circular orbit and around a main phase machine distribution;
One main phase machine lifting adjusting structure is corresponding with a main phase machine, multiple side camera liftings and angle Adjustment structure is spent to correspond respectively at the more side cameras;
The main phase machine lifting adjusting structure drives the main phase machine vertically to lift;
The side camera lifting and angle adjustment mechanism drive the side camera lifting or rotation, and the side camera edge is vertical Direction elevating movement, the rotation axis of the side camera are parallel with horizontal plane.
The main phase machine lifting adjusting structure is motor lead screw driving structure in one of the embodiments,.
The side camera lifting and angle adjustment mechanism include lifting driving portion and angle tune in one of the embodiments, Section portion, the lifting driving portion drive the side camera vertically elevating movement, and the angle adjustment drives the side Camera rotate, it is described lifting driving portion be motor lead screw driving structure, the angle adjustment be cylinder driving structure, the angle The telescopic end for spending adjustment portion is equipped with rack, and the side camera is equipped with and the rack meshed gears.
It, can be according to defect in binocular vision by above method step it is found that this programme is while detection defect automatically Parallax in system, so as to fulfill the function that the foreign matter defect in liquid crystal automatic checkout equipment and surface dirt are distinguished, therefore, sheet What the foreign matter defect and surface dirt that invention can solve realize in automatic checkout equipment in the prior art cannot be distinguished asks Topic.
Detection device is improved by above-mentioned structure, is had the advantages that:
Duo Tai sides camera is slidably mounted on circular orbit and is distributed around a main phase machine, and such structure design makes The adjusting of position can be much carried out between the camera of platform side, according to the size of product and the actual conditions of detection, is adapted to The position between the camera of Duo Tai sides of property is adjusted;
Main phase machine lifting adjusting structure driving main phase machine vertically lifts, such structure design, according to product Size, thickness size can carry out adaptability adjusting to the height and position of main phase machine, achieve the purpose that focus, so as to obtain The image that must be more clear;
Side camera lifting and the lifting of angle adjustment mechanism driving side camera or rotation, on the one hand, can be with the height of offside camera Degree position is adjusted, and on the other hand, can be adjusted with the angle of offside camera, according to actual conditions such as the sizes of product, The height and angle of the adjusting side camera of adaptability, so as to obtain the image being more clear.
Description of the drawings
Fig. 1 is a kind of level schematic diagram of liquid crystal display;
Fig. 2 is the step flow chart of the liquid crystal display defect and dust differentiating approach based on binocular vision system of the present invention;
Fig. 3 is the schematic diagram of detection device;
Fig. 4 is the schematic diagram being detected using binocular vision system to liquid crystal display;
Fig. 5 is is imaged liquid crystal display using binocular vision system to obtain binocular image A;
Fig. 6 is is imaged liquid crystal display using binocular vision system to obtain binocular image B;
Fig. 7 is the schematic diagram of the detection device of another embodiment;
Fig. 8 is the schematic diagram of main phase machine lifting adjusting structure shown in Fig. 7;
Fig. 9 is the schematic diagram of side camera shown in Fig. 7 lifting and angle adjustment mechanism.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In attached drawing Give the better embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to herein Described embodiment.On the contrary, the purpose of providing these embodiments is that make to understand more the disclosure Add thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ", For illustrative purposes only, it is unique embodiment to be not offered as " right side " and similar statement.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention The normally understood meaning of technical staff is identical.Term used in the description of the invention herein is intended merely to description tool The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " including one or more The arbitrary and all combination of relevant Listed Items.
As shown in Fig. 2, a kind of liquid crystal display defect based on binocular vision system and dust differentiating approach, include the following steps:
Step 1, liquid crystal display to be detected is positioned in detection device, detection device includes a main phase machine and is surrounded on The Duo Tai sides camera of main phase machine distribution, using a main phase machine and any one side camera composition binocular vision system;
Step 2, the face on the basis of the liquid crystal layer of liquid crystal display to be detected carries out binocular vision system using target picture Calibration, determines the mapping relations between the corresponding image coordinate system of binocular vision system;
Step 3, liquid crystal display is imaged using binocular vision system, obtains binocular image A and image B, wherein, image A is Imaging of the main phase machine to liquid crystal display, image B are imaging of the side camera to liquid crystal display;
Step 4, image procossing is carried out to image A and image B respectively, according to half-tone information, obtains the defects of image letter Breath;In the present embodiment, defect information includes:The surface dirt information of foreign matter defect information, liquid crystal screen surfaces in liquid crystal display.
Step 5, image A and image B is transformed into datum level coordinate system according to mapping relations;
Step 6, in datum level coordinate system, to the defects of image A and image B, defect is carried out according to matching criterior Registration obtains parallax information of the defect in image A and image B on liquid crystal display;Wherein, it is accurate to include epipolar-line constraint for matching criterior Then, similarity constraint criterion, disparity continuity constraint criterion, sequence constraint criterion, disparity constraint criterion, mutual induction constraint criterion Deng.
Step 7, judge parallax information of the defect in image A and image B, be if the same shown to be foreign matter defect, such as Fruit difference is then shown to be surface dirt.Further, judge that parallax information of the defect in image A and image B includes:Judgement pair Answer whether the image parallactic of defect is more than preset error threshold;If described image parallax is more than the error threshold, sentence The defect of breaking is not foreign matter defect;If described image parallax is less than the error threshold, judge the defect for foreign matter Defect.
As shown in figure 3, specifically, in the present embodiment, detection device 20 includes a main phase machine 21 and is surrounded on main phase Four side cameras 22 that machine 21 is distributed, formation is distributed four side cameras 22 in a ring centered on main phase machine 21.Wherein, main phase machine 21 be high resolution camera, and side camera 22 is low-resolution cameras, and the camera acquisition visual field covers entire liquid crystal region.Using one Main phase machine 21 forms binocular vision system with any one side camera 22, and defects detection is carried out to liquid crystal display.For example, using one Wherein one composition binocular vision system of the main phase machine 21 successively respectively with four side cameras 22 is imaged liquid crystal display, so as to obtain Four binocular images carry out global alignment to four binocular images, so as to more accurately carry out defects detection to liquid crystal display.
As shown in Fig. 4, Fig. 5 and Fig. 6, it is described as follows:
Liquid crystal display 10 to be detected is positioned in detection device, liquid crystal module 10 include be bonded successively cover board 11, it is upper partially Mating plate 12, liquid crystal layer 13, down polaroid 14, backlight 15.Small items positioned at 11 surface of cover board are defined as surface dirt 16, Small items between cover board 11 and upper polaroid 12 are defined as foreign matter defect 17.
The face on the basis of the liquid crystal layer 13 of liquid crystal display 10 to be detected, using target picture to binocular vision system into rower It is fixed, determine the mapping relations between the corresponding image coordinate system of binocular vision system;
Liquid crystal display is imaged using binocular vision system, obtains binocular image A and image B, wherein, image A is main camera Imaging to liquid crystal display, image B are imaging of the side camera to liquid crystal display;Image procossing, root are carried out to image A and image B respectively According to half-tone information, the defects of image information is obtained;By image A and image B according to mapping relations, it is transformed into datum level coordinate system System;For example, in image A, main phase machine obtains surface dirt imaging 16 ' to the imaging of surface dirt 16, and main phase machine is to foreign matter defect 17 imagings obtain foreign matter defect 17 ';In image B, side camera obtains surface dirt imaging 16 ", side to the imaging of surface dirt 16 Camera obtains foreign matter defect 17 " to the imaging of foreign matter defect 17.Since surface dirt 16 is located at 11 top of cover board and away from liquid crystal layer 13 It is farther, by side camera to surface dirt 16 be imaged obtain surface dirt imaging 16 " side view be converted to front view after, with main phase The image comparison of machine shooting, this is dotted can deviate it is farther, conversely, foreign matter defect 17 deviate it is smaller, as a result, can be by surface dirt 16 It is distinguished with foreign matter defect 17, so as to identify whether liquid crystal display is foreign matter defect;
In datum level coordinate system, to the defects of image A and image B, defect registration is carried out according to matching criterior, is obtained Take parallax information of the defect in image A and image B on liquid crystal display;Judge parallax information of the defect in image A and image B, If the same foreign matter defect is shown to be, surface dirt is shown to be if different.For example, in image A, two imagings are mutual Between by it is nearer, and in image B, two imagings are farther apart each other, then may determine that, current liquid crystal display 10 there is Foreign matter defect.
It, can be according to defect in binocular vision by above method step it is found that this programme is while detection defect automatically Parallax in system, so as to fulfill the function that the foreign matter defect in liquid crystal automatic checkout equipment and surface dirt are distinguished, therefore, sheet What the foreign matter defect and surface dirt that invention can solve realize in automatic checkout equipment in the prior art cannot be distinguished asks Topic.
As shown in Fig. 7, Fig. 8 and Fig. 9, specifically, detection device 20 includes:One main phase machine 21, Duo Tai sides camera 22, ring 23, main phase machine lifting adjusting structures 24 of shape track, the lifting of multiple side cameras and angle adjustment mechanism 25.
One main phase machine 21 is placed in the center of circular orbit 23, and Duo Tai sides camera 22 is slidably mounted on circular orbit 23 It goes up and surround a main phase machine 21 and be distributed.
One main phase machine lifting adjusting structure 24 is corresponding with a main phase machine 21, multiple side camera liftings and angular adjustment knot Structure 25 is corresponded respectively at Duo Tai sides camera 22.
Main phase machine lifting adjusting structure 24 drives main phase machine 21 vertically to lift.
Side camera lifting and 25 driving side camera 22 of angle adjustment mechanism are lifted or are rotated, and side camera 22 vertically rises Drop movement, the rotation axis of side camera 22 are parallel with horizontal plane.
Detection device 20 is improved by above-mentioned structure, is had the advantages that:
Duo Tai sides camera 22 is slidably mounted on circular orbit 23 and is distributed around a main phase machine 21, and such structure is set Meter so that the adjusting of position can be carried out between Duo Tai sides camera 22, according to the size of product and the practical feelings of detection Condition, the position between Duo Tai sides camera 22 of adaptability are adjusted;
Main phase machine lifting adjusting structure 24 drives main phase machine 21 vertically to lift, such structure design, according to production Size, the thickness size of product can carry out adaptability adjusting to the height and position of main phase machine 21, achieve the purpose that focus, So as to obtain the image being more clear;
Side camera lifting and 25 driving side camera 22 of angle adjustment mechanism are lifted or are rotated, on the one hand, can be with offside camera 22 height and position is adjusted, and on the other hand, can be adjusted with the angle of offside camera 22, real according to size of product etc. Border situation, the height and angle of the adjusting side camera 22 of adaptability, so as to obtain the image being more clear.
In the present embodiment, main phase machine lifting adjusting structure 24 is motor lead screw driving structure;Side camera lifting and angle Adjustment structure 25 includes lifting driving portion and angle adjustment, lifts the vertically elevating movement of driving portion driving side camera, Angle adjustment driving side camera rotates, and lifting driving portion is motor lead screw driving structure, and angle adjustment is cylinder driving knot Structure, the telescopic end of angle adjustment are equipped with rack, and side camera is equipped with and rack meshed gears.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that those of ordinary skill in the art are come It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims (3)

1. a kind of detection device, which is characterized in that including:One main phase machine, Duo Tai sides camera, circular orbit, a main phase machine Lifting adjusting structure, the lifting of multiple side cameras and angle adjustment mechanism;
One main phase machine is placed in the center of the circular orbit, and the more side cameras are slidably mounted on the annular On track and around a main phase machine distribution;
One main phase machine lifting adjusting structure is corresponding with a main phase machine, multiple side camera liftings and angle tune Section structure is corresponded respectively at the more side cameras;
The main phase machine lifting adjusting structure drives the main phase machine vertically to lift;
The side camera lifting and angle adjustment mechanism drive the side camera lifting or rotation, and the side camera is vertically Elevating movement, the rotation axis of the side camera are parallel with horizontal plane.
2. detection device according to claim 1, which is characterized in that the main phase machine lifting adjusting structure is motor lead screw Driving structure.
3. detection device according to claim 1, which is characterized in that the side camera lifting and angle adjustment mechanism include Driving portion and angle adjustment are lifted, the lifting driving portion drives the side camera vertically elevating movement, the angle It spends adjustment portion and drives the side camera rotation, the lifting driving portion is motor lead screw driving structure, and the angle adjustment is Cylinder driving structure, the telescopic end of the angle adjustment are equipped with rack, and the side camera is equipped with what is engaged with the rack Gear.
CN201721501516.XU 2017-11-09 2017-11-09 Liquid crystal display defect based on binocular vision system distinguishes detection device with dust Active CN207503282U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109580644A (en) * 2018-12-17 2019-04-05 范建明 A kind of visual detection equipment of auto-parts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109580644A (en) * 2018-12-17 2019-04-05 范建明 A kind of visual detection equipment of auto-parts
CN109580644B (en) * 2018-12-17 2022-01-11 海南联新科技有限公司 Visual inspection equipment for automobile parts

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Address after: 215011 rooms 101, 102, 901 and 902, floor 1, building 11, 198 Jialingjiang Road, high tech Zone, Suzhou, Jiangsu Province

Patentee after: Gaoshi Technology (Suzhou) Co.,Ltd.

Address before: 516006 District 75, Zhongkai high tech Industrial Development Zone, Huizhou City, Guangdong Province

Patentee before: HUIZHOU GOVION TECHNOLOGY Co.,Ltd.

EE01 Entry into force of recordation of patent licensing contract
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Assignee: Suzhou Gaoshi Semiconductor Technology Co.,Ltd.

Assignor: Gaoshi Technology (Suzhou) Co.,Ltd.

Contract record no.: X2021990000430

Denomination of utility model: LCD defect and dust discrimination detection device based on binocular vision system

Granted publication date: 20180615

License type: Common License

Record date: 20210722

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Address after: 215129 Rooms 101, 102, 901, 902, Floor 9, Building 11, No. 198, Jialing River Road, High tech Zone, Suzhou City, Jiangsu Province

Patentee after: Gaoshi Technology (Suzhou) Co.,Ltd.

Address before: 215011 rooms 101, 102, 901 and 902, floor 1, building 11, 198 Jialingjiang Road, high tech Zone, Suzhou, Jiangsu Province

Patentee before: Gaoshi Technology (Suzhou) Co.,Ltd.