CN107767377A - Liquid crystal display defect and dust differentiating approach and detection means based on binocular vision system - Google Patents

Liquid crystal display defect and dust differentiating approach and detection means based on binocular vision system Download PDF

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Publication number
CN107767377A
CN107767377A CN201711100005.1A CN201711100005A CN107767377A CN 107767377 A CN107767377 A CN 107767377A CN 201711100005 A CN201711100005 A CN 201711100005A CN 107767377 A CN107767377 A CN 107767377A
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Prior art keywords
image
defect
liquid crystal
crystal display
principal phase
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CN201711100005.1A
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CN107767377B (en
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姜涌
汪杰
邹伟金
魏斌
孙成
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Huizhou Gaoshi Technology Co Ltd
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Huizhou Gaoshi Technology Co Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00Image analysis
    • G06T7/0002Inspection of images, e.g. flaw detection
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/88Investigating the presence of flaws or contamination
    • G01N21/95Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1306Details
    • G02F1/1309Repairing; Testing
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/88Investigating the presence of flaws or contamination
    • G01N21/95Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N2021/9513Liquid crystal panels
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/30Computing systems specially adapted for manufacturing

Abstract

The present invention discloses a kind of liquid crystal display defect based on binocular vision system and dust differentiating approach and detection means.Differentiating approach comprises the following steps:The face on the basis of liquid crystal layer, binocular vision system is demarcated using target picture, determine the mapping relations between image coordinate system corresponding to binocular vision system;Liquid crystal display is imaged using binocular vision system, obtains binocular image A and image B;Image procossing is carried out to image A and image B respectively, obtains the defects of image information;Image A and image B are transformed into reference plane coordinate system;In reference plane coordinate system, to the defects of image A and image B, parallax information of the defect in image A and image B on liquid crystal display is obtained;Judge parallax information of the defect in image A and image B, identical is then foreign matter defect, different then be shown to be surface dirt.Can solve the problems, such as that the foreign matter defect that can not be realized in automatic checkout equipment in the prior art and surface dirt cannot be distinguished by.

Description

Liquid crystal display defect and dust differentiating approach and detection means based on binocular vision system
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 With dust differentiating approach and detection means.
Background technology
LCD (Liquid Crystal Display) liquid crystal display typical case's composition is from top to bottom followed successively by TP (Touch Panel, touch-screen) glass, upper polaroid, colored filter, liquid crystal layer, (Thin Film Transistor, film are brilliant by TFT Body pipe) substrate, down polaroid and backlight.With the development of LCD technology, it is with high resolution, small volume, in light weight, nothing Radiation, panelized and it is low in energy consumption the features such as, the leading role in display market is rapidly become, from mobile phone to portable game machine, from industry The manual operation platform of equipment to numerous areas such as bank self-aid apparatus ATM (Automatic Teller Machine), LCD without Institute does not exist.Therefore, the quality testing for LCD liquid crystal displays becomes particularly important.
The technological process and quality testing of LCD liquid crystal displays mainly include:Panel cuttings, paster, COG FOG, dispensing, group Backlight;Wherein main quality testing include panel cutting after, after paster 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 foreign matter is 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 contrasted with internal real defect, still with increasing light source in liquid crystal layer surface TP layers 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 plate 11, Upper polaroid 12, liquid crystal layer 13, down polaroid 14, backlight 15.Small items positioned at the surface of cover plate 11 are defined as surface ash Dirt 16, the small items between cover plate 11 and upper polaroid 12 are defined as foreign matter defect 17.The origin cause of formation of foreign matter defect 17 is, Because liquid crystal module 10 is when being assembled in fitting cover plate 11, the foreign matter that falls between cover plate 11 and upper polaroid 12 also has in addition Sub-fraction is the foreign matter that the supplied materials of cover plate 11 is present in cover plate.
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 Get and filtered out as dust, because surface dirt 16 and foreign matter defect 17 are only every layer transparent cover plate 11, both take The basic indifference of feature, can not accurately distinguish.
The content of the invention
The purpose of the present invention is to overcome weak point of the prior art, there is provided a kind of liquid crystal based on binocular vision system Shield defect and dust differentiating approach and detection means, to solve in current technology automatic checkout equipment to foreign matter defect and surface dirt The problem of cannot be distinguished by.
The purpose of the present invention is achieved through the following technical solutions:
A kind of liquid crystal display defect based on binocular vision system and dust differentiating approach, comprise the following steps:
Liquid crystal display to be detected is positioned in detection device, detection device includes a principal phase machine and is surrounded on principal phase machine The Duo Tai sides camera of distribution, using a principal phase machine and any one side camera composition binocular vision system;
The face on the basis of the liquid crystal layer of liquid crystal display to be detected, binocular vision system is demarcated using target picture, Determine the mapping relations between image coordinate system corresponding to 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 is carried out to image A and image B respectively, according to half-tone information, obtains the defects of image information;
By image A and image B according to mapping relations, reference plane coordinate system is transformed into;
In reference plane coordinate system, to the defects of image A and image B, defect registration is carried out according to matching criterior, 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, be if the same shown to be foreign matter defect, if different Then it is shown to be surface dirt.
In one of the embodiments, detection device includes a principal phase machine and is surrounded on four side phases of principal phase machine distribution Machine, formation is distributed four side cameras in a ring centered on principal phase machine.
In one of the embodiments, principal phase machine is high resolution camera, and side camera is low-resolution cameras.
In one of the embodiments, defect information includes:Foreign matter defect information, the table of liquid crystal screen surfaces in liquid crystal display Face dust information.
In one of the embodiments, judge that parallax information of the defect in image A and image B includes:
Judge whether the image parallactic of corresponding defect is more than default error threshold;
If described image parallax is more than the error threshold, the defect is judged not for foreign matter defect;
If described image parallax is less than the error threshold, judge the defect for foreign matter defect.
A kind of detection means, including:One principal phase machine, Duo Tai sides camera, circular orbit, a principal phase machine rising-falling tone nodule Structure, the lifting of multiple side cameras and angle adjustment mechanism;
One principal 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 principal phase machine distribution;
One principal phase machine lifting adjusting structure is corresponding with a principal phase machine, multiple side camera liftings and angle Adjustment structure is spent to correspond respectively at the more side cameras;
The principal phase machine lifting adjusting structure drives the principal phase machine vertically to lift;
The side camera lifting and angle adjustment mechanism drive the side camera lifting or rotated, and the side camera edge is vertical Direction elevating movement, the rotary shaft and plane-parallel of the side camera.
In one of the embodiments, the principal 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 drive division and angle is adjusted Section portion, the lifting drive division drive the side camera vertically elevating movement, and the angle adjustment drives the side Camera rotates, and the lifting drive division is motor lead screw driving structure, and the angle adjustment is cylinder driving structure, the angle The telescopic end of degree adjustment portion is provided with rack, and the side camera is provided with and the rack meshed gears.
From above method step, this programme, can be according to defect in binocular vision while detection defect automatically Parallax in system, so as to realize the foreign matter defect in liquid crystal automatic checkout equipment and the function of surface dirt differentiation, therefore, this Invention can solve the foreign matter defect that can not be realized in automatic checkout equipment in the prior art and what surface dirt cannot be distinguished by asks Topic.
Brief 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 detected using binocular vision system to liquid crystal display;
Fig. 5 is that liquid crystal display is imaged using binocular vision system to obtain binocular image A;
Fig. 6 is that liquid crystal display is imaged 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 the principal phase machine lifting adjusting structure shown in Fig. 7;
Fig. 9 is the schematic diagram of the side camera lifting and angle adjustment mechanism shown in Fig. 7.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying 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 for providing these embodiments is to 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 element 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 implication that technical staff is generally understood that 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 " include one or more The arbitrary and all combination of related Listed Items.
As shown in Fig. 2 a kind of liquid crystal display defect based on binocular vision system and dust differentiating approach, comprise the following steps:
Step 1, liquid crystal display to be detected is positioned in detection device, detection device includes a principal phase machine and is surrounded on The Duo Tai sides camera of principal phase machine distribution, using a principal 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, binocular vision system is carried out using target picture Demarcation, determines the mapping relations between image coordinate system corresponding to 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 principal 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 reference plane coordinate system according to mapping relations;
Step 6, in reference plane coordinate system, to the defects of image A and image B, defect is carried out according to matching criterior Registration, obtain 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 default 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 principal phase machine 21 and is surrounded on principal phase Four side cameras 22 that machine 21 is distributed, formation is distributed four side cameras 22 in a ring centered on principal phase machine 21.Wherein, principal phase machine 21 be high resolution camera, and side camera 22 is low-resolution cameras, and the camera collection visual field covers whole liquid crystal region.Using one Principal 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 principal phase machine 21 successively respectively with four side cameras 22 is imaged to liquid crystal display, so as to obtain Four binocular images, global alignment is carried out 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 plate 11, it is upper partially Mating plate 12, liquid crystal layer 13, down polaroid 14, backlight 15.Small items positioned at the surface of cover plate 11 are defined as surface dirt 16, Small items between cover plate 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, rower is entered to binocular vision system using target picture It is fixed, determine the mapping relations between image coordinate system corresponding to 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, reference plane coordinate system is transformed into System;For example, in image A, principal phase machine obtains surface dirt imaging 16 ' to the imaging of surface dirt 16, and principal 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.Because surface dirt 16 is located at the top of cover plate 11 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 principal phase Machine shooting image comparison, the point-like can offset it is farther, conversely, foreign matter defect 17 offset it is smaller, thus, can be by surface dirt 16 Made a distinction with foreign matter defect 17, so as to identify whether liquid crystal display is foreign matter defect;
In reference plane coordinate system, to the defects of image A and image B, defect registration is carried out according to matching criterior, 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.
From above method step, this programme, can be according to defect in binocular vision while detection defect automatically Parallax in system, so as to realize the foreign matter defect in liquid crystal automatic checkout equipment and the function of surface dirt differentiation, therefore, this Invention can solve the foreign matter defect that can not be realized in automatic checkout equipment in the prior art and what surface dirt cannot be distinguished by asks Topic.
As shown in Fig. 7, Fig. 8 and Fig. 9, specifically, detection means 20 includes:One principal phase machine 21, Duo Tai sides camera 22, ring 23, principal phase machine lifting adjusting structures 24 of shape track, the lifting of multiple side cameras and angle adjustment mechanism 25.
One principal 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 Go up and surround a principal phase machine 21 and be distributed.
One principal phase machine lifting adjusting structure 24 is corresponding with a principal phase machine 21, multiple side camera liftings and angular adjustment knot Structure 25 corresponds respectively at Duo Tai sides camera 22.
Principal phase machine lifting adjusting structure 24 drives principal phase machine 21 vertically to lift.
Side camera lifting and the driving side camera 22 of angle adjustment mechanism 25 are lifted or rotated, and side camera 22 vertically rises Drop motion, the rotary shaft and plane-parallel of side camera 22.
Detection means 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 principal phase machine 21, and such structure is set Meter so that the regulation of position can be carried out between Duo Tai sides camera 22, according to the size of product and the actual feelings of detection Condition, adaptability are adjusted to the position between Duo Tai sides camera 22;
Principal phase machine lifting adjusting structure 24 drives principal phase machine 21 vertically to lift, such structure design, according to production Size, the thickness size of product, adaptability regulation can be carried out to the height and position of principal phase machine 21, reach the purpose focused, So as to obtain the image become apparent from;
Side camera lifting and the driving side camera 22 of angle adjustment mechanism 25 are lifted or 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 regulation side camera 22 of adaptability, so as to obtain the image become apparent from.
In the present embodiment, principal phase machine lifting adjusting structure 24 is motor lead screw driving structure;Side camera lifting and angle Adjustment structure 25 includes lifting drive division and angle adjustment, lifts the vertically elevating movement of drive division driving side camera, Angle adjustment driving side camera rotates, and lifting drive division is motor lead screw driving structure, and angle adjustment is cylinder driving knot Structure, the telescopic end of angle adjustment are provided with rack, and side camera is provided with and rack meshed gears.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art Say, 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 Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims (8)

1. a kind of liquid crystal display defect based on binocular vision system and dust differentiating approach, it is characterised in that comprise the following steps:
Liquid crystal display to be detected is positioned in detection device, detection device includes a principal phase machine and is surrounded on the distribution of principal phase machine Duo Tai sides camera, using a principal phase machine and any one side camera composition binocular vision system;
The face on the basis of the liquid crystal layer of liquid crystal display to be detected, binocular vision system is demarcated using target picture, it is determined that Mapping relations between image coordinate system corresponding to 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 to liquid The imaging of crystalline substance screen, image B is imaging of the side camera to liquid crystal display;
Image procossing is carried out to image A and image B respectively, according to half-tone information, obtains the defects of image information;
By image A and image B according to mapping relations, reference plane coordinate system is transformed into;
In reference plane coordinate system, to the defects of image A and image B, defect registration is carried out according to matching criterior, obtains liquid Upper parallax information of the defect in image A and image B of crystalline substance screen;
Judge parallax information of the defect in image A and image B, be if the same shown to be foreign matter defect, the table if different Bright is surface dirt.
2. the liquid crystal display defect according to claim 1 based on binocular vision system and dust differentiating approach, it is characterised in that Detection device includes a principal phase machine and is surrounded on four side cameras of principal phase machine distribution, and four side cameras are centered on principal phase machine Formation is distributed in a ring.
3. the liquid crystal display defect according to claim 2 based on binocular vision system and dust differentiating approach, it is characterised in that Principal phase machine is high resolution camera, and side camera is low-resolution cameras.
4. the liquid crystal display defect according to claim 1 based on binocular vision system and dust differentiating approach, it is characterised in that Defect information includes:The surface dirt information of foreign matter defect information, liquid crystal screen surfaces in liquid crystal display.
5. the liquid crystal display defect according to claim 1 based on binocular vision system and dust differentiating approach, it is characterised in that Judge that parallax information of the defect in image A and image B includes:
Judge whether the image parallactic of corresponding defect is more than default error threshold;
If described image parallax is more than the error threshold, the defect is judged not for foreign matter defect;
If described image parallax is less than the error threshold, judge the defect for foreign matter defect.
A kind of 6. detection means, it is characterised in that including:One principal phase machine, Duo Tai sides camera, circular orbit, a principal phase machine Lifting adjusting structure, the lifting of multiple side cameras and angle adjustment mechanism;
One principal 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 principal phase machine distribution;
One principal phase machine lifting adjusting structure is corresponding with a principal phase machine, and multiple side camera liftings and angle are adjusted Nodule structure corresponds respectively at the more side cameras;
The principal phase machine lifting adjusting structure drives the principal phase machine vertically to lift;
The side camera lifting and angle adjustment mechanism drive the side camera lifting or rotated, and the side camera is vertically Elevating movement, the rotary shaft and plane-parallel of the side camera.
7. detection means according to claim 6, it is characterised in that the principal phase machine lifting adjusting structure is motor lead screw Driving structure.
8. detection means according to claim 6, it is characterised in that the side camera lifting and angle adjustment mechanism include Drive division and angle adjustment are lifted, the lifting drive division drives the side camera vertically elevating movement, the angle Spending adjustment portion drives the side camera to rotate, and the lifting drive division is motor lead screw driving structure, and the angle adjustment is Cylinder driving structure, the telescopic end of the angle adjustment are provided with rack, and the side camera is provided with what is engaged with the rack Gear.
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