CN104375293B - Automatic LCD screen detecting cabinet based on machine vision - Google Patents
Automatic LCD screen detecting cabinet based on machine vision Download PDFInfo
- Publication number
- CN104375293B CN104375293B CN201410667987.2A CN201410667987A CN104375293B CN 104375293 B CN104375293 B CN 104375293B CN 201410667987 A CN201410667987 A CN 201410667987A CN 104375293 B CN104375293 B CN 104375293B
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- lcd screen
- darkroom
- machine vision
- rotating disk
- industrial camera
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- 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)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses an automatic LCD screen detecting cabinet based on machine vision. The automatic LCD screen detecting cabinet based on machine vision comprises a cabinet base, a darkroom, a multi-station rotating plate system, an automatic machine vision adjusting system and an automatic PG screen pointing system. The automatic PG screen pointing system comprises a graph signal generator, a pneumoelectric sliding ring, a power source, a computer and a plurality of signal rotating plates corresponding to LCD screen jigs in number. The automatic machine vision adjusting system comprises an industrial camera, a camera installation assembly, a perpendicular movement mechanical arm and a mechanical arm support. A light source support is further arranged on the top of the cabinet base, and a light source is arranged on the light source support and located between the industrial camera and the LCD screen jigs. The signal output end of the industrial camera is connected into the computer, and the control end of the perpendicular movement mechanical arm and the control end of the motor are connected into the computer. The automatic LCD screen detecting cabinet can eliminate the influences of external natural light and dust and impurities in the air on LCD screen defect detection, and meanwhile, the detecting cabinet has high integration degree, and the detecting efficiency of an LCD screen is greatly improved.
Description
Technical field
The present invention relates to automatic optics inspection technical field, examined automatically in particular to a kind of LCD screen based on machine vision
Survey board.
Background technology
Current TFT LCDs are the devices of main flow in display device, widely should be had in daily life
With, it is currently the only brightness, contrast, power consumption in the life-span, is caught up with and more than CRT's comprehensively in the combination property such as physical examination and weight
Display device, with the intensification in LCDs market, people increasingly pay close attention to LCDs industry, traditional in order to replace
The method of manual detection, researcher starts to import CCD (industrial camera) detection technique, design AOI (Automatic Optic
Inspection) systematic substitution human eye detection, but the entrance and dust in air impurity due to extraneous natural light are detected to CCD
The interference and the interference of communication connection for causing so that the false drop rate of testing equipment, loss are high on the market, cross and examine serious, difficult
To replace human eye detection, while underintegration, low (the simply single experimental study equipment, it is impossible to producing line knot of detection efficiency
Conjunction carries out pipelining detection).
The content of the invention
Present invention aim to provide a kind of LCD screen automatic detection board based on machine vision, the detection board
Influence of the extraneous natural light to LCD screen defects detection can be eliminated, while this detection board has integrated level higher, is greatly improved
The detection efficiency of LCD screen.
In order to achieve this, the LCD screen automatic detection board based on machine vision designed by the present invention, it includes board
Base, the darkroom, the station dial installed in board base top that are made up of front plate, backplate, top board and two side plates
System, in station dial system and can to LCD screen to be measured conveying test signal PG (Pattern Generator,
Figure signal generator) from moving point screen system, can carry out installed in board base top and to LCD screen to be measured the machine of defects detection
Device vision automatic adjustment system, the light source for being arranged in darkroom and detection illumination being provided LCD screen to be measured, wherein, the machine
The top of platform base is fixedly connected with the bottom in darkroom, and the board base on the outside of the darkroom front plate is operating desk, institute
Stating station dial system multiple including rotating disk, circumferentially uniformly at the top of rotating disk is used to install the LCD of LCD screen to be measured
Screen tool, the rotary positioning apparatus for being arranged on the energy driving rotating disk indexing rotation of rotating disk bottom, the half of the rotating disk are located at darkroom
Interior, second half is located at outside darkroom rotating disk, and the rotating disk in darkroom is test section, and the rotating disk outside darkroom is test etc.
Wait area.
The top board in the darkroom is provided with blower fan filtering unit, and multiple fans, the darkroom are provided with the board base
The opening of front plate is provided with ionic air knife, and the operating desk of the board base is provided with ion blower, the blower fan filtering machine
The air input of group is located at darkroom outside, and the air output end of blower fan filtering unit is located at darkroom inner side, described each fan
Air input be located at darkroom inner side, the air output end of each fan is located at darkroom outside.
Beneficial effects of the present invention：
The present invention can provide cleaning by setting blower fan filtering unit, fan, ionic air knife and ion blower for darkroom
Environment, so can effectively prevent the entrance of dust impurity and provide the air of cleaning, greatly reduce dust impurity to LCD
Shield the influence of detection.The above-mentioned station dial system that the present invention is provided can allow other when a LCD screen is detected
LCD screen is in the waiting station of rotating disk, can so significantly improve the efficiency of batch LCD screen detection, and the PG coordinated with it
Automatization level of the invention is significantly improved from moving point screen system and machine vision automatic adjustment system.In addition, the present invention is carried
The PG of confession takes the communication mode of pneumoelectric slip ring from moving point screen system, it is ensured that communication process stabilization during LCD screen on-line checking
It is reliable.
Brief description of the drawings
Fig. 1 is dimensional structure diagram of the invention；
Fig. 2 is to remove the dimensional structure diagram after the side plate of darkroom in the present invention；
Fig. 3 is the structural representation of station dial system in the present invention；
Fig. 4 is to install structured flowcharts of the PG from after moving point screen system in the present invention in station dial system；
Fig. 5 is the structural representation of machine vision automatic adjustment system in the present invention；
Fig. 6 is LCD screen to be measured, signal flap, figure signal generator, industrial camera, catenary motion machinery in the present invention
Circuit block diagram between hand, motor and computer.
Wherein, 1-board base, 2-darkroom, 2.1-opening, 3-station dial system, 3.1-rotating disk, 3.2-
LCD screen tool, 3.3-motor, 3.4-decelerator, 3.5-dispenser, 4-machine vision automatic adjustment system, 4.1-industry
Camera, 4.2-camera mounting assembly, 4.3-catenary motion manipulator, 4.4-manipulator support, 4.5-towing chain mechanism,
4.6-position-limit mechanism, 5-PG are slided from moving point screen system, 5.1-signal flap, 5.2-figure signal generator, 5.3-pneumoelectric
Ring, 5.4-power supply, 5.5-computer, 6-LCD screen to be measured, 7-light source bracket, 7.1-light source, 8-blower fan filtering unit, 9-
Fan, 10-ionic air knife, 11-ion blower, 12-problem screen holder, 13-instrument cases.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail：
The LCD screen automatic detection board based on machine vision as shown in figs. 1 to 6, it is including board base 1, by front
Plate, backplate, top board and two darkrooms 2 of side plate composition, the station dial system 3 installed in the top of board base 1, installations
In station dial system 3 and can to LCD screen to be measured 6 conveying test signal PG from moving point screen system 5, installed in board bottom
The top of seat 1 and the machine vision automatic adjustment system 4 of defects detection can be carried out to LCD screen to be measured 6, to be arranged on darkroom 2 interior and right
LCD screen to be measured 6 provides the light source 7.1 of detection illumination, wherein, the top of the board base 1 is fixed with the bottom in darkroom 2 and is connected
Connect, the board base 1 on the outside of the front plate of the darkroom 2 be operating desk, the station dial system 3 include rotating disk 3.1,
Circumferentially the uniform multiple installed in the top of rotating disk 3.1 is used to install the LCD screen tool 3.2 of LCD screen to be measured 6, is arranged on rotating disk
The rotary positioning apparatus that the energy driving rotating disk indexing of 3.1 bottoms is rotated, the half of the rotating disk 3.1 is located in darkroom 2, rotating disk 3.1
Second half is located at outside darkroom 2, and the rotating disk 3.1 in darkroom 2 is test section, and the rotating disk 3.1 outside darkroom 2 is test
Waiting area.The bottom of the front plate of darkroom 2 is provided with opening 2.1, and the opening 2.1 provides space for the rotation of rotating disk 3.1, opening
2.1 inner sides are test section, and the outside of opening 2.1 is test waiting area.
The rotary positioning apparatus of the station dial system 3 include being arranged on the motor 3.3 of the bottom of rotating disk 3.1 and slow down
Device 3.4 (for increasing output torque) and dispenser 3.5, the output shaft of the motor 3.3 connect segmentation by decelerator 3.4
The input of device 3.5, the output end of dispenser 3.5 drives the indexing of rotating disk 3.1 to rotate (accurately being indexed according to station number).
In above-mentioned technical proposal, the PG from moving point screen system 5 include figure signal generator 5.2, pneumoelectric slip ring 5.3,
Power supply 5.4, computer 5.5 multiple signal flaps 5.1 corresponding with the number of LCD screen tool 3.2, above-mentioned figure signal generator 5.2
It is fixedly connected with rotating disk 3.1 with multiple signal flaps 5.1, the first communication ends of each signal flap 5.1 are by correspondence
LCD screen tool 3.2 connect the communication ends of LCD screen to be measured 6, the second communication ends of each signal flap 5.1 access figure news
First communication ends of number generator 5.2, the power end of the figure signal generator 5.2 connects power supply by pneumoelectric slip ring 5.3
5.4, the second communication ends of figure signal generator 5.2 access computer 5.5 by pneumoelectric slip ring 5.3, the pneumoelectric slip ring 5.3
Upper part can be rotated with rotating disk 3.1, and bottom and the board base 1 of pneumoelectric slip ring 5.3 are fixed.
In above-mentioned technical proposal, the machine vision automatic adjustment system 4 includes industrial camera 4.1, camera mounting assembly
4.2nd, catenary motion manipulator 4.3, manipulator support 4.4, the manipulator support 4.4 are arranged on the top of board base 1 simultaneously
In darkroom 2, the mounting surface of the catenary motion manipulator 4.3 is arranged on manipulator support 4.4, the catenary motion machine
The lifting action end of tool hand 4.3 is fixedly connected camera mounting assembly 4.2, mounting industrial camera in the camera mounting assembly 4.2
4.1, the industrial camera 4.1 is located at the top of LCD screen tool 3.2 and the alignment lenses LCD screen tool 3.2 of industrial camera 4.1；
The signal output part of the industrial camera 4.1 accesses computer 5.5, and the control end of catenary motion manipulator 4.3 also connects
Enter computer 5.5, the control end of motor 3.3 also accesses computer 5.5.Computer 5.5 can obtain the photograph of industrial camera 4.1 in the present invention
Piece, can control the action of catenary motion manipulator 4.3, can control the working condition of motor 3.3, can pass through figure signal generator
5.2 send test picture to LCD screen to be measured 6.
In above-mentioned technical proposal, light source bracket 7 is further fixed in the darkroom 2, light source 7.1, institute are set on light source bracket 7
Light source 7.1 is stated to be located between industrial camera 4.1 and LCD screen tool 3.2.The light source 7.1 irradiates LCD screen to be measured 6, for protruding
The feature of LCD screen to be measured 6.Light source 7.1 can be bar-shaped LED light source, LED backlight or LED coaxial light sources or above-mentioned several light
Source combines and uses.
In above-mentioned technical proposal, the catenary motion manipulator 4.3 is provided with position-limit mechanism 4.6.For to catenary motion
Manipulator 4.3 carries out position limitation protection.
In above-mentioned technical proposal, figure signal generator 5.2 provides LCD screen by signal flap 5.1 to LCD screen to be measured 6
Signal, power supply and detection image needed for detection, the figure signal generator 5.2 are rotated with the rotating disk 3.1.It is above-mentioned
Relative rotation situation is realized between figure signal generator 5.2 and power supply 5.4 and computer 5.5 by way of pneumoelectric slip ring 5.3
Under communication connection.
In above-mentioned technical proposal, the shooting position that the industrial camera 4.1 is adjusted to need by catenary motion manipulator 4.3
Put.
In above-mentioned technical proposal, it also includes towing chain mechanism 4.5, and the mounting bracket of the towing chain mechanism 4.5 is fixed on machinery
The top of hand support 4.4, the drag chain of the towing chain mechanism 4.5 is arranged on the side of camera mounting assembly 4.2, the industrial camera
4.1 data wire and power line is drawn by towing chain mechanism 4.5.
In above-mentioned technical proposal, the top board in the darkroom 2 is provided with blower fan filtering unit 8, the board base 1 and is provided with
Multiple fans 9, the opening 2.1 of the front plate of the darkroom 2 is provided with ionic air knife 10, is set on the operating desk of the board base 1
The air input for having ion blower 11, the blower fan filtering unit 8 is located at the outside of darkroom 2, and the air of blower fan filtering unit 8 is defeated
Go out end and be located at the inner side of darkroom 2, the air input of each fan 9 is located at the inner side of darkroom 2, the air output of each fan 9
End is located at the outside of darkroom 2.Above-mentioned darkroom 2, blower fan filtering unit 8, fan 9, ionic air knife 10 are used to prevent the incidence of natural light
And ensure the cleaning of internal environment.The blower fan filtering unit 8 is downwards toward the clean sky for providing inside clean darkroom 2 at the uniform velocity
Gas, fan 9 takes out the air in darkroom 2 outward, and blower fan filtering unit 8 and fan 9 are used in combination and ensure that the inner air of darkroom 2
It is clean.The wind of the blowout of ionic air knife 10 forms one air curtain, for preventing external dust impurity from entering darkroom 2.Ion blower 11
The dust impurity on operating personnel and product to be checked can be blown off, the accuracy for being conducive to LCD screen to detect.
In above-mentioned technical proposal, the delivery outlet of the ionic air knife 10 vertically downward, the delivery outlet of the ion blower 11
Towards the artificial operative position of the operating desk of board base 1.
In above-mentioned technical proposal, problematic screen holder 12 is set in the front plate in the darkroom 2.
In above-mentioned technical proposal, instrument cases 13 are additionally provided with the front plate in the darkroom 2.
In above-mentioned technical proposal, darkroom 2 is made up of hardware and black acrylic door, darkroom 2 spray it is sub- black, not instead
Light, it is ensured that without natural light interference in whole darkroom 2.
During present invention work, LCD screen to be measured 6 is placed into corresponding LCD screen tool 3.2 by operating personnel on operating desk
On, then, computer 5.5 controls rotating disk 3.1 to rotate by motor 3.3, decelerator 3.4, dispenser 3.5, above-mentioned LCD screen tool
3.2 turn on the test section station in darkroom 2, and now, computer 5.5 passes through figure signal generator 5.2 and signal flap 5.1
Screen test image is transferred to above-mentioned LCD screen to be measured 6；Now light source 7.1 is lighted, and computer 5.5 passes through catenary motion manipulator
The focal length of 4.3 control industrial cameras 4.1, industrial camera 4.1 is taken pictures to the LCD screen to be measured 6 on above-mentioned LCD screen tool 3.2, industry
The image transmitting that camera 4.1 is taken pictures is shown that operating personnel judge the quality of LCD screen to be measured 6 with this to computer 5.5.Upper
LCD screen to be measured 6 is stated while detection, be in place another LCD screen to be measured 6 in the LCD screen on operating desk by operating personnel
On tool 3.2, after the completion of waiting first LCD screen to be measured 6 to detect rotating disk 3.1 carried out by rotating a station second it is to be measured
The detection of LCD screen 6, operating personnel will detect that problematic LCD screen is placed in problem screen holder 12.
The content that this specification is not described in detail belongs to prior art known to professional and technical personnel in the field.
Claims (10)
1. a kind of LCD screen automatic detection board based on machine vision, it include board base (1), by front plate, backplate,
The darkroom (2) of top board and two side plates composition, the station dial system (3) at the top of board base (1), installed in many
In station turnplate system (3) and can to LCD screen to be measured (6) conveying test signal PG from moving point screen system (5), installed in board
Base (1) top simultaneously can carry out the machine vision automatic adjustment system (4) of defects detection to LCD screen to be measured (6), be arranged on darkroom
(2) in and to LCD screen to be measured (6) provide detection illuminate light source (7.1), wherein, the top of the board base (1) with it is dark
The bottom of room (2) is fixedly connected, and the board base (1) on the outside of the darkroom (2) front plate is operating desk, the multistation
Rotating table system (3) is including rotating disk (3.1), circumferentially the uniform multiple at the top of rotating disk (3.1) is used to install LCD screen to be measured
(6) LCD screen tool (3.2), be arranged on rotating disk (3.1) bottom can the rotary positioning apparatus that rotate of driving rotating disk indexing, it is described
The half of rotating disk (3.1) is located in darkroom (2), and second half is located at darkroom (2) outward with rotating disk (3.1), described in darkroom (2)
Rotating disk (3.1) is test section, is test waiting area positioned at darkroom (2) rotating disk (3.1) outward.
2. the LCD screen automatic detection board based on machine vision according to claim 1, it is characterised in that：The PG is certainly
Moving point screen system (5) includes figure signal generator (5.2), pneumoelectric slip ring (5.3), power supply (5.4), computer (5.5) and LCD
The corresponding multiple signal flaps (5.1) of screen tool (3.2) number, above-mentioned figure signal generator (5.2) and multiple signal flaps
(5.1) it is fixedly connected with rotating disk (3.1), the first communication ends of each signal flap (5.1) are controlled by corresponding LCD screen
Tool (3.2) connects the communication ends of LCD screen (6) to be measured, and the second communication ends of each signal flap (5.1) access figure signal hair
First communication ends of raw device (5.2), the power end of the figure signal generator (5.2) connects electricity by pneumoelectric slip ring (5.3)
Source (5.4), the second communication ends of figure signal generator (5.2) access computer (5.5), the gas by pneumoelectric slip ring (5.3)
The upper part of electric slip ring (5.3) can rotate with rotating disk (3.1), and the bottom of pneumoelectric slip ring (5.3) is fixed with board base (1).
3. the LCD screen automatic detection board based on machine vision according to claim 2, it is characterised in that：The machine
Vision automatic adjustment system (4) includes industrial camera (4.1), camera mounting assembly (4.2), catenary motion manipulator (4.3), machine
Tool hand support (4.4), the manipulator support (4.4) is installed in the top of board base (1) and is located in darkroom (2), described
The mounting surface of catenary motion manipulator (4.3) is arranged on manipulator support (4.4), the catenary motion manipulator (4.3)
Lifting action end is fixedly connected camera mounting assembly (4.2), mounting industrial camera (4.1), institute in the camera mounting assembly (4.2)
Industrial camera (4.1) is stated positioned at the top of LCD screen tool (3.2) and the alignment lenses LCD screen tool of industrial camera (4.1)
(3.2)；
The signal output part of the industrial camera (4.1) accesses computer (5.5), the control end of catenary motion manipulator (4.3)
Computer (5.5) is accessed, the control end of motor (3.3) also accesses computer (5.5).
4. the LCD screen automatic detection board based on machine vision according to claim 3, it is characterised in that：The darkroom
(2) light source bracket (7) is further fixed in, light source (7.1) is set on light source bracket (7), the light source (7.1) is positioned at industrial camera
(4.1) and LCD screen tool (3.2) between.
5. the LCD screen automatic detection board based on machine vision according to claim 3, it is characterised in that：It also includes
Towing chain mechanism (4.5), the mounting bracket of the towing chain mechanism (4.5) is fixed on manipulator support (4.4) top, the towing chain mechanism
(4.5) drag chain is arranged on the side of camera mounting assembly (4.2), and the data wire and power line of the industrial camera (4.1) lead to
Cross towing chain mechanism (4.5) extraction.
6. the LCD screen automatic detection board based on machine vision according to claim 3, it is characterised in that：The darkroom
(2) bottom of front plate is provided with opening (2.1), and the opening (2.1) provides space, the darkroom (2) for the rotation of rotating disk (3.1)
Top board be provided with blower fan filtering unit (8), is provided with multiple fans (9), darkroom (2) front in the board base (1)
The opening (2.1) of plate is provided with ionic air knife (10), and the operating desk of the board base (1) is provided with ion blower (11), institute
The air input for stating blower fan filtering unit (8) is located at darkroom (2) outside, and the air output end of blower fan filtering unit (8) is located at
Darkroom (2) inner side, the air input of each fan (9) is located at darkroom (2) inner side, the air output of each fan (9)
End is located at darkroom (2) outside.
7. the LCD screen automatic detection board based on machine vision according to claim 6, it is characterised in that：The ion
Vertically downward, the delivery outlet of the ion blower (11) is towards the artificial of board base (1) operating desk for the delivery outlet of air knife (10)
Operative position.
8. the LCD screen automatic detection board based on machine vision according to claim 1, it is characterised in that：The darkroom
(2) problematic screen holder (12) is set in front plate, instrument cases is additionally provided with the front plate of the darkroom (2)
(13)。
9. the LCD screen automatic detection board based on machine vision according to claim 3, it is characterised in that：It is described vertical
Movable machinery hand (4.3) is provided with position-limit mechanism (4.6).
10. the LCD screen automatic detection board based on machine vision according to claim 1, it is characterised in that：The multiplexing
The rotary positioning apparatus of position rotating table system (3) include being arranged on the motor (3.3) and decelerator (3.4) of rotating disk (3.1) bottom with
And dispenser (3.5), the output shaft of the motor (3.3) connects the input of dispenser (3.5) by decelerator (3.4), point
The output end of cutter (3.5) drives rotating disk (3.1) indexing to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410667987.2A CN104375293B (en) | 2014-11-20 | 2014-11-20 | Automatic LCD screen detecting cabinet based on machine vision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410667987.2A CN104375293B (en) | 2014-11-20 | 2014-11-20 | Automatic LCD screen detecting cabinet based on machine vision |
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| CN104375293A CN104375293A (en) | 2015-02-25 |
| CN104375293B true CN104375293B (en) | 2017-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410667987.2A Active CN104375293B (en) | 2014-11-20 | 2014-11-20 | Automatic LCD screen detecting cabinet based on machine vision |
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Address after: 430070 Hubei City, Hongshan Province, South Lake Road, No. 53, Hongshan Venture Center, building on the 4 floor, No. Patentee after: Wuhan fine test electronics group Limited by Share Ltd Address before: 430070 Hubei City, Hongshan Province, South Lake Road, No. 53, Hongshan Venture Center, building on the 4 floor, No. Patentee before: Wuhan Jingce Electronic Technology Co., Ltd. |