KR20150017231A - Inspection system for the external appearance of panel having scan structure - Google Patents

Inspection system for the external appearance of panel having scan structure Download PDF

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Publication number
KR20150017231A
KR20150017231A KR1020130093238A KR20130093238A KR20150017231A KR 20150017231 A KR20150017231 A KR 20150017231A KR 1020130093238 A KR1020130093238 A KR 1020130093238A KR 20130093238 A KR20130093238 A KR 20130093238A KR 20150017231 A KR20150017231 A KR 20150017231A
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South Korea
Prior art keywords
panel
scan
module
appearance
area
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KR1020130093238A
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Korean (ko)
Inventor
이태송
오주환
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주식회사 아이스피
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Priority to KR1020130093238A priority Critical patent/KR20150017231A/en
Publication of KR20150017231A publication Critical patent/KR20150017231A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/956—Inspecting patterns on the surface of objects
    • G01N21/95607—Inspecting patterns on the surface of objects using a comparative method
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL 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
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

The present invention relates to an external inspection system for a panel having an accurate scan structure for scanning the external appearance of the panel and analyzing the external appearance image of the scanned panel to check whether the external appearance of the panel is defective,
In the present invention, a visual inspection system for a panel including a scan module for photographing an appearance image of a panel that has entered a scan area,
The scan module includes: a carrier arm for seating the panel;
A forward / backward member for moving the carrier arm forward and backward so as to allow the panel, which is seated on the carrier arm, And
And a scan camera that scans an outer surface of the panel that enters and exits into the scan area.

Description

Technical Field [0001] The present invention relates to an inspection system for a panel having a precision scan structure,

The present invention relates to an appearance inspection system for a panel having a precision scan structure, and more particularly, to an appearance inspection system for a panel having a precision scan structure in which the appearance of a panel is scanned and an appearance image of the scanned panel is analyzed, ≪ / RTI >

In general, various electronic products such as a smart phone, a tablet PC, and a digital scan camera are provided with panels such as a cover glass and a touch panel, and various patterns and patterns are formed through printing on these panels.

However, external defects such as printing, coating defects, scratches and scratches may inevitably occur on the outer surface of the panel, and when a panel having such defects is provided in an electronic product, the reliability of the product is greatly reduced May occur.

In order to prevent this, the visual inspection of the panel has traditionally been performed by a visual inspection in which the operator visually inspects the appearance of the panel. However, this results in a decrease in productivity due to inspection of the panel, And it is difficult to guarantee reliability due to the appearance inspection of the panel because it always has the possibility of not being able to detect the appearance defect of the panel.

In order to solve this problem, in the related art, there have been proposed visual inspection devices for scanning a surface of a panel to obtain a surface image of the panel, and reading the obtained image to check whether a panel is defective.

Particularly, the present inventors have proposed a technique of arranging a scan camera and an illuminating member on a moving path of a panel which is seated on a conveyance belt and moved on a conveying belt through Korean Patent Registration No. 10-1076010, .

However, since the visual inspection apparatus is configured to inspect the external appearance of the panel through a single scanning process, and the panel moves in a state of being seated on the conveyance belt of the conveyance conveyor where frequent vibration or fluctuation occurs during the movement, The position or direction may be easily disturbed by vibration or fluctuation during the movement along the conveyance belt.

If the position or orientation of the panel is disturbed, it is difficult to obtain an appearance image obtained by scanning the external appearance of the panel. In particular, since it is difficult to inspect the appearance of the panel as a whole through a single image, A difficult problem is pointed out.

In order to solve the above problems, it is an object of the present invention to provide a method and apparatus for scanning an outer appearance of a panel and analyzing an external appearance image of the panel, The present invention also provides a system for inspecting the appearance of a panel having a precision scan structure in which an improved reliability according to the appearance inspection of the panel is ensured.

The above object is achieved by the following constitutions provided in the present invention.

A system for inspecting the appearance of a panel having a precision scan structure according to the present invention includes:

And a scan module for photographing an exterior image of the panel that has entered the scan area, the system comprising:

The scan module includes: a carrier arm for seating the panel;

A rectilinear transferring member for advancing and retracting the carrier arm to allow the panel mounted on the carrier arm to enter and exit the scan area; And

And a scan camera that scans an outer surface of the panel that enters and exits into the scan area.

Preferably, the scan module is provided with a scan area changing unit for moving the scan camera to change the scan area of the scan camera. In the process of the panel entering the scan area, the scan camera is moved to one side And the scan camera is moved to the other side by the scan area changing unit to scan the outer surface of the other side of the panel,

The scan camera scans the panel that enters and exits the scan area in a divided manner to acquire a panel appearance image of a high resolution.

More preferably, the scan area changing unit includes a servo motor for generating a forward and reverse rotational force, and a mover connected to the servo motor by a ball screw structure and moving according to forward and reverse rotation of the servo motor,

The scan camera is configured to move to one side and the other side by moving the mover due to normal / reverse rotation of the servo motor to change the scan area.

In the present invention, a plurality of inspection stages for scanning the exterior image of the panel through the scan module are disposed on the movement path of the panel, and a transfer module for moving the panel stepwise along each inspection stage is disposed between the scan modules .

Accordingly, in the present invention, while the panel is moved step by step along each inspection stage by the transfer module, the panel appearance images scanned in various forms by the scan module installed in each inspection stage are acquired, Or more precisely.

In addition, when the panel is positioned on the inspection stage in which the scan module is formed through the transfer module, the panel that is moved in stages is continuously inserted into each inspection stage provided with the scan module, It is possible to scan the exterior of the panel moved step by step, thereby ensuring promptness in acquiring the appearance image of the panel, and thus has an improved productivity.

Particularly, since the step movement of the panel through the transfer module and the entrance and exit of the panel through the carrier arm are suppressed, the panel can maintain the precise position, speed, and focal distance, And enters and exits the scan area of the scan module, it is possible to acquire the panel appearance image with higher precision.

FIG. 1 and FIG. 2 are views showing the entire configuration of a visual inspection system for a panel proposed in the preferred embodiment of the present invention,
FIG. 3 is a view showing an operation state of a calibration module formed on a conveying module and a supply stand in a panel visual inspection system proposed in the preferred embodiment of the present invention,
FIG. 4 is a block diagram of a panel visual inspection system proposed in the preferred embodiment of the present invention, which collects the entire configuration and operating state of the transfer module,
FIG. 5 is a block diagram of a panel visual inspection system proposed in the preferred embodiment of the present invention, which collects the overall configuration and operational state of the transfer module,
6 to 8 show a scan state of a panel appearance through a scan module formed in each inspection stage in a panel appearance inspection system proposed in the preferred embodiment of the present invention,
FIG. 9 is a view showing an arrangement state of a scan camera and a light formed in a scan module proposed in the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 and FIG. 2 are views showing the overall configuration of a visual inspection system for a panel, which is a preferred embodiment of the present invention, and an appearance scanning process of the panel as a whole. FIG. 4 is a block diagram showing the overall appearance of the transfer module, and FIG. 4 is a sectional view of the transfer module shown in FIG. And FIG. 5 is a view for collecting the overall configuration and operating state of the transfer module in the panel inspection system proposed in the preferred embodiment of the present invention, and FIGS. 6 to 7 are views In a visual inspection system for a panel proposed as a preferred embodiment of the invention, a scan module Will show the status of the scan through the panel exterior, Figure 8 shows the arrangement of the scanning cameras and lights formed in the scan module proposed in the present invention in its preferred embodiment.

The panel visual inspection system 1 proposed in the preferred embodiment of the present invention includes a plurality of inspection stages S on which scan modules 40 and 50 having different illumination and scan angles are formed, ) Of the panel G are scanned and inspected for appearance, and various panel appearance images obtained by the scan modules 40 and 50 are read and analyzed to precisely check whether the appearance of the panel G is defective.

As shown in FIGS. 1 and 2, the visual inspection system 1 of the above-described panel moves the panel G in a stepwise manner to transfer the panel G to the fulcrum point P of each inspection stage S by a transfer method A transfer module (30) for shifting and positioning stepwise through the transfer module (30); And a scan module (40, 50) for acquiring an appearance image of the panel (G) by advancing / falling a single panel (G) located at the fulcrum point (P) into the scan area.

Appearance images of the panel G obtained by the scan modules 40 and 50 are read and analyzed by a reading device (not shown) to check whether the panel G is defective in appearance.

Here, the reading device (not shown) analyzes edges and patterns of the panel appearance image acquired through the respective scan modules 40 and 50, analyzes the sample image stored in the database, The defect is checked.

The technique for checking whether the appearance of the panel is defective through the edge extraction technique or the pattern matching technique is a well-known technology that is publicly disclosed in the field of vision inspection in this field. Therefore, for convenience of description, The description is omitted.

In this embodiment, however, a plurality of inspection stages S having scan modules 40 and 50 with different illumination and scan angles are formed step by step, and a panel G Is moved and moved step by step by the transfer module 30 so that a single panel G moving step by step through each inspection stage S is guided to each scan module 40 , 50) to acquire the appearance image of the high-precision panel (G) within a short period of time, and it is intended as a technical point of the present invention.

The transfer module 30 for implementing the stepwise transfer of the panel G includes transfer arms 31 having suction ports 31a for suctioning the panel G as shown in FIGS. An elevating member 32 for elevating and lowering the transfer arms 31 to adjust the phase; And a rectilinear transferring member 33 for reciprocating the transfer arms 31, which are elevated by the elevating member 32, in the horizontal direction.

Referring to the drawing, the elevating member 32 is provided with a connecting bracket 32a to which a plurality of transfer arms 31 are fixed, so that the plurality of transfer arms 31 are collectively moved up and down by a single elevating member 32 do.

The pair of transfer arms 31 are spaced apart from each other in the connection bracket 32a so that both sides of the panel G are respectively fixed by the pair of transfer arms 31. [

At this time, the transfer arm 31 arranged in the connection bracket 32a in a group is configured to be movable in the lateral direction, and the width of the transfer arms 31, Panel G in common.

2 and 3, there is formed a supply stand 10 on which a panel G is seated by a robot arm (not shown) or the like, and the supply stand 10 is provided on the front side of the transfer module 30. [ Between the transfer arm 31 of the transfer module 30 and the transfer arm 31 of the transfer module 30 to pick up the surface of the panel G mounted on the supply stand 10 20 are disposed.

The pick-up module 20 includes: an adsorption plate 21 for adsorbing the surface of the panel G through an adsorption port 21a formed on the bottom; A lifting member (22) for lifting the attracting plate (21); And a rectilinear transferring member 23 for linearly reciprocating the elevating member 22 in which the attracting plate 21 is lifted and lowered. The attracting plate 21 is supported by the conveying member 10 and the transfer module 30, The panel G is seated on the transfer arm 31 of the transfer module 30 after the one panel G is seated on the supply table 10 while reciprocating between the arms 31. [

A calibration unit 11 for aligning the position of the panel G seated on the supply stand 10 is disposed at the edge of the supply stand 10 so as to pressurize the side surface of the panel G.

The calibration unit 11 includes a reference block 12 formed on the upper surface of the supply table 10 as shown in FIG. 3B; A longitudinal alignment member 13 which presses the longitudinal sides of the panel G longitudinally through the calibration block 13a to adhere both sides of the panel 12 to the reference block 12, And a transverse alignment member 14 for pressing the transverse side of the panel G in the transverse direction.

The calibration blocks 13a and 14a constituting the longitudinal alignment member 13 and the transverse alignment member 14 are connected to the forward and reverse motors 13b and 14b and the ball screws 13c and 14c, The panel G mounted on the supply stand 10 is aligned with the reference block 12 at a predetermined position while moving in the longitudinal direction or the lateral direction by normal and reverse rotation of the forward and reverse motors 13b and 14b.

The longitudinal alignment member 13 and the calibration blocks 13a and 14a formed in the calibration block 14a are provided with the resilient piece 13a-b, 14a- b are respectively formed so as to mitigate the impact applied to the panel G on the side of the panel G for the positional correction and on the lateral sides thereof to prevent the damage of the panel G from being physically damaged.

Therefore, when a single panel G is seated on the supply stand 10 by the robot arm, the calibration unit 11 can detect the longitudinal and lateral sides of the panel through the calibration blocks 13a and 14a in the longitudinal direction or in the transverse direction The panel G mounted on the supply stand 10 is positively positioned with respect to the reference block 12 as a reference.

The suction plate 21 of the pick-up module 20 then sucks the panel G positioned on the feed table 10 through the suction port 21a formed on the bottom surface of the transfer arm 30 of the transfer module 30 31).

The transfer arm 31 of the transfer module 30 which has adsorbed the bottom surface of the single panel G through the suction port 31a is driven by the sequential drive of the elevation member 32 and the rectilinear transfer member 33 The panel G is moved in a stepwise manner to the fulcrum point P formed in the inspection stage S by performing a series of transfer processes of ascending-lateral movement-descending-lateral movement (return)

At the same time, another transfer arm 31 formed on the transfer module 30 completes the exterior scan through the scan modules 40 and 50 of the inspection stage S, The lower surface of the inspection target stage G is sucked and a series of transfer processes of ascending-moving-descending-returning by successively driving the elevating member 32 and the rectilinear transferring member 33 are performed, The panel G is moved in a stepwise manner to the fulcrum point P.

The transfer module 30 adopted in the present embodiment is connected to each of the inspection stages S through a single transfer process through a plurality of transfer arms 31 disposed on the connection bracket 32a, Can be simultaneously moved and positioned.

Particularly, since the panel G is fixed in a state of being attracted to the transfer arm 31 in the moving process and the linear transporting member 33 is composed of an LM motor capable of stable vibration with stable vibration, Or the like can be prevented.

A scan module for acquiring an external image of the panel G by advancing and retracting the panel G positioned at the fulcrum point P by the transfer module 30 into the scan area and then moving back to the fulcrum point P 40 and 50 include illumination members 41 and 51 for illuminating the panel G with illumination as shown in Figs. 1 and 2 and Figs. 5 to 8; A scan camera (42, 42 ', 52) for performing a line scan or an area scan on the appearance of the panel (G) irradiated with the lights (41, 51); A carrier arm (43, 53) for sucking the bottom surface of the panel (G) positioned at the junction point (P) through the suction ports (43a, 53a); And rectilinear transfer members (44, 53) for advancing and retracting the carrier arms (43, 53) that have attracted the panel (G) to the scan area along the rails.

A pair of carrier arms 43 and 53 are spaced apart from each other in the scan modules 40 and 50 so that the suction holes 43a and 43a formed in the carrier arms 43 and 53 spaced apart from each other, 53a on both sides of the panel G are adsorbed.

The LM motor type which can perform the low vibration and the accurate linear movement can be adopted as the linearly moving members 23 and 33 of the pickup module 20 and the transfer module 30 and the scan modules 40 and 50, A ball screw type straight feed member may be adopted which includes a ball screw and realizes linear movement which is shaped by forward and reverse rotation of the ball screw.

The LM motor type or ball screw type linear transporting member performs the movement or entry / exit of the panel at a constant speed without displacement due to vibration, inertia, or the like during the movement or entry / exit of the panel G.

If necessary, a straight feed member for realizing a straight reciprocating movement through a cylinder structure or a rack and pinion structure for straight feed can be utilized.

Therefore, in the visual inspection system 1 of the panel according to the present embodiment, the panel G is simultaneously located at the fulcrum point P of each inspection station S positioned step by step by the transfer module 30, The panel P located at each inspection station S simultaneously enters and exits the corresponding scan module 40, 50, and the exterior is scanned.

Thus, it is possible to acquire a quick and precise appearance image of the panel G, and the reading device reads out and analyzes the appearance images of the panel acquired through the respective scan modules to determine whether the appearance of the panel is defective or not.

In addition, in the present embodiment, as shown in FIGS. 1, 2, 5 and 6, a longitudinal scanning device for scanning the exterior image of the panel G entering the longitudinal direction by entering the panel G in the longitudinal direction, (40); As shown in FIGS. 1, 2 and 8, the lateral scanning device 50 for scanning the exterior image of the panel G entering in the lateral direction by entering the panel G in the lateral direction is disposed, (G) is arbitrarily rotated so as to obtain inspection images of the panels entering the longitudinal direction and the lateral direction without changing the entry / exit direction of the panel entering the scan area.

That is, in the present invention, in order to read a defect of a panel that is not found in a scan image scanned in a single direction, a test image in which a panel is scanned in a longitudinal direction and a test image in which a panel is scanned in a lateral direction are respectively acquired, In order to perform a more precise visual inspection of the panel through the images, it is necessary to rotate the panel itself so as not to switch the entering direction of the panel, And acquire the inspection images, respectively.

This configuration eliminates the problem of the deviation of the panel requiring a scan due to the rotational angle error or the positional movement due to the rotation of the panel at a fixed angle or position, It is possible to acquire the appearance image of the image.

In the drawings, a plurality of longitudinal scan modules 40 are mounted on the side of the transfer module 30 and are equipped with a line scan scan camera. One longitudinal scanning module 40 equipped with an area scan scanning camera 42 'is sequentially arranged.

Each of the longitudinal scan modules 40 is provided with a pair of carrier arms 43 spaced apart in a longitudinal direction by a single linear transporting member 44 formed of an LM motor.

Therefore, the panel G moved to the junction point P by the transfer module 30 is adsorbed on both sides by the adsorption port 43a of the carrier arm 43 formed on the longitudinal scan module 40 The outline image is scanned step by step by the line scan camera while advancing and retracting in the scan area in the longitudinal direction, and then the outline image is scanned by the area scan camera while advancing in the longitudinal direction to the scan area in which the area scan camera is disposed.

At this time, a scan area conversion unit 45 is formed in the scan unit 40 to move the line scan camera 42 in the lateral direction to change the scan area of the line scan camera 42.

The scan range conversion unit 45 includes a servomotor 45a for generating a forward and reverse rotational force as shown in FIGS. 5B and 5C, a ball screw 45b connected to the servo motor, And the line scan camera 42 fixed to the mover 45c is configured to move by the forward and reverse rotation of the servo motor 45a to change the scan area to the left and right.

Accordingly, in the process of the panel G entering the scan area, the line scan camera 42 moves the scan area to one side by the scan area conversion unit 45 to scan one side of the panel G, The line scan camera 42 scans the other side of the panel G by moving the scan area to the other side by the scan area conversion unit 45 in the process of advancing the scan line G to the line point P, It is possible to divide and scan the panel G which enters and exits from the panel G to acquire the appearance image of the panel G having a higher resolution.

In this embodiment, on the side of the transfer module 30 for transferring the panel G in the lateral direction stepwise, a panel G is provided, A plurality of inspection stages S having a longitudinal scanning module 40 for scanning the exterior image of the inspection object G are disposed.

FIG. 8 is a schematic view showing an example of arrangement of the illumination members and the scan cameras formed in the longitudinal scan modules, the laterally-scanned scan module to be described later, and the number of the longitudinal scan modules and the lateral scan modules, The arrangement of the scan camera can be variously modified according to the product or the usage type.

According to the present embodiment, among the plurality of longitudinal scan modules 40, the four longitudinal scan modules 40 are provided with a pair of longitudinally parallel carrier arms 43 spaced apart as shown in FIG. 5 The line scan camera 42 is moved in the longitudinal direction by inserting the carrier arm 43 into the longitudinal direction W of the panel G so that the panel G on which the longitudinal axis W is fixed by the carrier arm 43, In a line scan mode.

6, when the carrier arm 43 which has stuck to the lateral (L) side of the panel G enters and exits in the longitudinal direction, the area scan camera 42 ' And performs an area scan of the panel G on which the sides are adhered.

When the point of tilting of the panel G by the carrier arm 43 is changed as described above, the end W of the panel covered by the carrier arm of the longitudinal scan module shown in FIG. 5 is scanned by the scan The entire image of the panel can be acquired by the longitudinal scan modules which are different in the attachment region of the panel G. [

A transverse scanning module 50 is provided at the rear of the transfer module 30 to scan the exterior image of the panel that horizontally advances and retracts the panel G positioned at the fulcrum point P One inspection stage S is arranged.

1 and 2, a suction plate 21a for sucking the surface of the panel G through a suction port 21a formed on the bottom surface is provided between the longitudinal scanning module 40 and the lateral scanning module 50, (21); A lifting member (22) for lifting the attracting plate (21); And a straight feed member (23) for moving the elevating member (22) which moves the attracting plate (21) up and down along the rails.

The panel G is moved in the longitudinal direction to the inspection stage S in which the longitudinal scanning module 40 is disposed in the longitudinal direction by sequentially moving the panel G in the lateral direction by the transfer module 30, The panel G is horizontally advanced and retracted to obtain a test image in which the panel G is scanned in the horizontal direction.

When the first robot arm (not shown) seats a single panel G on the supply stand 10, the external appearance inspection system 1 of the panel , The longitudinal alignment member 13 and the lateral alignment member 14 formed on the calibration unit 11 press the longitudinally long side W and the lateral side L of the panel G respectively so that the panel G is moved to the reference block 12).

At this time, the calibration blocks 13a and 14a constituting the longitudinal alignment member 13 and the transverse alignment member 14 are connected to the elastic members 13a-b And 14a-b, respectively, to thereby prevent the panel G from being damaged by the pressing of the calibration blocks 13a and 14a.

In this state, the pick-up module 20 sucks the surface of the panel G aligned with the supply stand 10 via the suction plate 21, and transfers the sheet G to the transfer arm 31 of the transfer module 30 G and the transfer module 30 moves the transfer arm 31 step by step so as to transfer the panel G to the junction point P formed in each inspection stage S, The scan module 40 formed in each inspection stage S performs a scanning process of advancing and retracting the carrier arm 41 in the longitudinal direction and scanning the panel G which advances and retracts in the longitudinal direction along the scan zone .

The transfer process and the scanning process are alternately and repeatedly performed and the panel G supplied to the supply stand 10 is scanned by the scan module formed in each inspection stage S, Directional scanning is performed.

At this time, in the line scan process, the panel G is vertically moved in the longitudinal direction with the longitudinal sides W thereof being respectively fixed by the suction port 41a of the carrier arm 41. In the area scan process, And the lateral sides (L) of the arm are fixed to the suction port so as to enter and exit in the longitudinal direction. Thus, the area occluded locally by the suction port of the carrier arm during the line scan process is not blocked during the area scan process, The whole appearance image of the panel can be obtained without the area covered by the change of the site.

5B, the scan module 42 is positioned at one side of the panel G so as to scan the outer surface of one side of the panel, and as shown in FIG. 5C, The scan camera 42 is moved to the other side by the scan area conversion unit to scan the outer surface of the other side of the panel G so that the line scan camera of the vertical scan module can scan the panel So that an appearance image of the panel G having a high resolution is obtained.

Therefore, the scan camera 42 can convert the scan area by the scan area conversion unit, and stably obtain the appearance of the panel that is wider than the scan area.

When the longitudinal scanning process is completed, the panel G is moved by the pick-up module 20 disposed between the longitudinal scanning module 40 and the lateral scanning module 50, The panel G is moved in the lateral direction by the carrier arm 53 of the lateral photographing module 50 while the appearance of the panel G is scanned by the line scan camera 52. [

Thus, the external appearance inspection system 1 of the panel according to the present invention acquires the external appearance images of the panel advancing in the longitudinal direction by scanning the exterior through the line scan and the area scan while advancing and retracting the panel G in the longitudinal direction, Appearance images of the panel G obtained through the scan modules 40 and 50 are read and analyzed by a read module (not shown) to determine whether the appearance of the panel G is defective or not.

As in the present embodiment, the vertical scanning module (not shown) that scans the panel G in different directions without changing the entry / exit direction of the panel G moving in and out of the scan area by rotating the panel G 40 and the lateral scanning module 50 are respectively disposed to acquire the longitudinal entrance image and the lateral entrance image of the panel G, respectively.

Accordingly, the panel G enters the scan area at a more accurate angle and position, and the external appearance is scanned to obtain the appearance image of the high-precision panel, thereby ensuring higher inspection reliability according to the appearance inspection of the panel .

1. Panel appearance inspection system
10. Feeder
11. Calibration unit 12. Reference block
13. Longitudinal alignment member 13a. Calibration block
13a-a. Spring 13a-b. Flange
13b. Forward and reverse motors 13c. Ball screw
14. Lateral alignment member 14a. Calibration block
14a-a. Spring 14a-b. Flange
14b. Forward and reverse motors 14c. Ball screw
20, 20 '. Pickup module 21. Suction plate
21a. The adsorption section 22. The elevation member
23. Straight feed member
30. Transfer module
31. Transfer arm 31a. Absorber
32. Lift member 32a. Lifting bracket
33. Straight feed member
40. Longitudinal scanning module 41. Illumination element
42. line scan camera 42 '. Area Scan Camera
43. Carrier arm 44. Straight feed member
45. Scan area conversion unit 45a. Servo Motor
45b. Ball Screw 45c. Mover
50. Lateral scanning module 51. Illumination element
52. Line scan camera 53. Carrier arm
54. Straight transfer member
G. Panel S. Inspection Stage
P. Yusen Branch

Claims (3)

And a scan module for photographing an exterior image of the panel that has entered the scan area, the system comprising:
The scan module includes: a carrier arm for seating the panel;
A rectilinear transferring member for advancing and retracting the carrier arm to allow the panel mounted on the carrier arm to enter and exit the scan area; And
And a scan camera that scans an outer appearance of the panel that enters and exits into the scan area. The apparatus of claim 1, wherein the scan module includes a scan area changing unit for moving a scan camera to change a scan area of the scan camera. In the process of the panel entering the scan area, The scan camera is moved to the other side by the scan area changing unit to scan the other side of the panel,
Wherein the scan camera is configured to scan the panel entering and exiting the scan area in a divided manner to obtain a high resolution panel appearance image. The apparatus of claim 1, wherein the scan area changing unit comprises: a servomotor for generating a forward and reverse rotational force; and a mover connected to the servo motor by a ball screw structure and moving according to forward and reverse rotation of the servo motor,
Wherein the scan camera is configured to move to one side and the other side by moving the mover due to normal / reverse rotation of the servo motor to change the scan area.
KR1020130093238A 2013-08-06 2013-08-06 Inspection system for the external appearance of panel having scan structure KR20150017231A (en)

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KR1020130093238A KR20150017231A (en) 2013-08-06 2013-08-06 Inspection system for the external appearance of panel having scan structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130093238A KR20150017231A (en) 2013-08-06 2013-08-06 Inspection system for the external appearance of panel having scan structure

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105548212A (en) * 2016-02-03 2016-05-04 杭州晶耐科光电技术有限公司 System and method for online automatically detecting defects on glass surface of touch screen
WO2019184353A1 (en) * 2018-03-30 2019-10-03 江苏迪佳电子有限公司 Production testing device for mobile phone touch screen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105548212A (en) * 2016-02-03 2016-05-04 杭州晶耐科光电技术有限公司 System and method for online automatically detecting defects on glass surface of touch screen
WO2019184353A1 (en) * 2018-03-30 2019-10-03 江苏迪佳电子有限公司 Production testing device for mobile phone touch screen

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