KR20110078958A - Apparatus for inspecting outward aspect of lcd panel - Google Patents
Apparatus for inspecting outward aspect of lcd panel Download PDFInfo
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- KR20110078958A KR20110078958A KR1020090135889A KR20090135889A KR20110078958A KR 20110078958 A KR20110078958 A KR 20110078958A KR 1020090135889 A KR1020090135889 A KR 1020090135889A KR 20090135889 A KR20090135889 A KR 20090135889A KR 20110078958 A KR20110078958 A KR 20110078958A
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- 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
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8901—Optical details; Scanning details
- G01N21/8903—Optical details; Scanning details using a multiple detector array
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- G—PHYSICS
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- 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
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- 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
- G01N2021/845—Objects on a conveyor
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- 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
- G01N2021/9513—Liquid crystal panels
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Abstract
Description
본 발명은 엘시디 패널 외관 검사장치에 관한 것으로, 보다 상세하게는 엘시디 패널의 다양한 부위 및 형태의 불량을 영상 촬영을 통해 신속하고 정확하게 검출할 수 있는 엘시디 패널 외관 검사장치에 관한 것이다.The present invention relates to an LCD panel visual inspection apparatus, and more particularly, to an LCD panel visual inspection apparatus capable of quickly and accurately detecting defects of various parts and shapes of an LCD panel through image capturing.
액정표시장치(Liquid Crystal Display; 이하 엘시디)는 두께가 얇고 무게가 가벼우며 전력소비가 적은 등의 장점이 있어 TV, 컴퓨터용 모니터를 비롯한 대형 디스플레이장치에서부터 휴대폰이나 PDA와 같은 이동통신기기, PMP, 네비게이션 등의 소형 디스플레이장치에 이르기까지 다양한 기기의 정보 표시수단으로 널리 사용되고 있다. Liquid Crystal Display (LCD) has the advantages of thin thickness, light weight, and low power consumption, so it can be used in large display devices such as TV and computer monitors, mobile communication devices such as mobile phones and PDAs, PMP, It is widely used as information display means of various devices, ranging from small display devices such as navigation devices.
엘시디를 이루는 액정패널(이하 엘시디 패널)은 액정 조성물이 봉입된 투명 기판의 내부에 매트릭스 형태로 배열된 다수의 전극이 구비된 구조로 이루어지며, 전극에 인가되는 영상신호에 따라 액정분자의 배향이 변화되고, 배향 변화에 따라 광 투과량이 조절되어 소정의 화면을 표시하게 된다. A liquid crystal panel (hereinafter, referred to as an LCD panel) that forms an LCD has a structure in which a plurality of electrodes arranged in a matrix form are provided inside a transparent substrate in which a liquid crystal composition is enclosed. The light transmittance is adjusted according to the change in orientation to display a predetermined screen.
상기한 엘시디 패널은 매우 높은 정밀도를 요하며, 제품의 일부에 작은 결점만이 있어도 제품 성능과 신뢰성에 커다란 악영향을 미칠 수 있기 때문에, 제조가 완료된 후 제품의 외관 품질을 검사하는 것이 매우 중요하다. It is very important to inspect the appearance quality of the product after the manufacturing is completed because the LCD panel requires very high precision, and even a small defect in a part of the product can have a great adverse effect on product performance and reliability.
그런데, 종래에는 이러한 외관 검사를 작업자에 의한 수작업으로 진행했기 때문에, 작업 속도가 느려 생산성이 매우 떨어지고 비용도 많이 소요되며, 작업자의 숙련도, 피로도 등에 따라 검사 수준이 불균일하고 정확도가 떨어져 품질에도 악영향을 미치는 문제가 있었다. However, in the past, since the appearance inspection was performed by a worker by hand, the work speed was slow, the productivity was very low, and the cost was very high. Mitch had a problem.
본 발명은 전술한 바와 같은 문제점을 해결하기 위한 것으로, 엘시디 패널의 다양한 부위에 대한 다양한 형태의 불량을 이송 간에 신속하고 정확하게 검출하여 제품 생산성과 품질을 향상시킬 수 있고, 검사공정의 비용 소요를 절감할 수 있도록 한 엘시디 패널 외관 검사장치를 제공하는 것에 목적이 있다. The present invention is to solve the problems described above, it is possible to quickly and accurately detect various types of defects on various parts of the LCD panel between the transfer to improve product productivity and quality, reducing the cost of inspection process An object of the present invention is to provide an LCD panel visual inspection apparatus.
상기한 목적을 달성하기 위한 본 발명은, LCD패널을 이송하는 컨베이어; 상기 컨베이어의 상부에 소정 간격으로 설치되어 LCD패널의 각 부분을 촬영하여 결함부를 검출하는 복수의 검사부; 상기 검사부 중 어느 두 검사부 사이에 설치되어 LCD패널을 상하 반전되도록 뒤집는 반전장치; 및 상기 각 검사부에서 촬영된 부분을 비교하여 불량 유무를 판정하는 컴퓨터 시스템을 포함하며, 상기 복수의 검사부 중 적어도 일측은 LCD패널의 표면에 대해 경사진 방향으로 빛을 조사하는 조명수단 및 상기 조명수단과 대향하여 LED패널의 빛 반사위치와 어긋나는 방향을 향하도록 설치된 라인스캔카메라를 구비한 것을 특징으로 하는 엘시디 패널 외관 검사장치를 제공한다.The present invention for achieving the above object, a conveyor for transporting the LCD panel; A plurality of inspection units installed at an upper portion of the conveyor at predetermined intervals to detect defects by photographing respective portions of the LCD panel; An inverting device installed between any two of the inspection units to invert the LCD panel upside down; And a computer system for comparing a portion photographed by each inspection unit to determine whether there is a defect, wherein at least one side of the plurality of inspection units irradiates light in an inclined direction with respect to the surface of the LCD panel. It provides an LCD panel external inspection device, characterized in that it has a line scan camera installed so as to face a direction that deviates from the light reflection position of the LED panel.
상기한 바와 같은 본 발명에 의하면, 조명수단과 라인스캔카메라가 서로 교차하는 방향을 지향하도록 대향 설치되고, 라인스캔카메라가 LCD패널의 빛 반사지점과 이격된 지점을 스캔하도록 하여 LCD패널의 결함부를 정확하고 신속하게 검사할 수 있도록 함으로써, 엘시디 패널 검사공정의 생산성과 품질을 향상시키고, 소요비용을 절감할 수 있는 효과가 있다. According to the present invention as described above, the lighting means and the line scan camera is installed so as to face in the direction crossing each other, the line scan camera to scan the point away from the light reflection point of the LCD panel to the defective portion of the LCD panel By allowing accurate and rapid inspection, the productivity and quality of the LCD panel inspection process can be improved and the required cost can be reduced.
상술한 본 발명의 목적, 특징 및 장점은 다음의 상세한 설명을 통하여 보다 분명해질 것이다. 이하, 첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시예를 상세히 설명한다.The objects, features and advantages of the present invention described above will become more apparent from the following detailed description. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명은 라인스캔카메라를 통해 LCD패널의 빛 반사지점과 어긋난 지점을 촬영하여 결함부를 정확하고 신속하게 행할 수 있도록 시스템화한 것으로, 기존의 영역스캔 방식의 카메라를 이용한 검사장치의 낮은 생산성과 신뢰성 문제를 해결할 수 있다.The present invention is a system that can accurately and quickly perform the defect portion by taking a point of deviation from the light reflection point of the LCD panel through a line scan camera, the low productivity and reliability problems of the inspection apparatus using a conventional area scan type camera Can be solved.
도 1은 본 발명에 따른 엘시디패널 외관 검사장치의 전체 시스템 구성을 도시한 것이고, 도 2 내지 도 4는 각 부위에 대한 불량 검사가 이루어지는 것을 도시한 것이며, 도 5 및 도 6은 엘시디패널에 발생되는 통상의 불량 양태를 나타내는 사진도이다. Figure 1 shows the overall system configuration of the LCD panel external inspection apparatus according to the present invention, Figures 2 to 4 shows that the defect inspection for each part is made, Figures 5 and 6 occur in the LCD panel It is a photograph figure which shows the normal defective aspect which becomes.
본 발명은 LCD패널의 손상이나 오염 등의 결함 여부를 검사하는 장치에 관한 것으로, LCD패널을 이송하는 컨베이어, 이 컨베이어의 상부에 소정 간격으로 설치되어 LCD패널의 결함부를 검출하는 복수의 검사부, 및 이 검사부 중 어느 두 검사부 사이에 설치되어 LCD패널을 상하 반전되도록 뒤집는 반전장치를 구비하며, 상기 복수의 검사부 중 적어도 일측은 LCD패널의 표면에 대해 경사진 방향으로 빛을 조사하는 조명수단 및 이 조명수단과 대향하여 LED패널의 빛 반사위치와 어긋나는 방향을 향하도록 설치된 라인스캔카메라를 구비한다 The present invention relates to an apparatus for inspecting defects such as damage or contamination of an LCD panel, comprising: a conveyor for transporting an LCD panel, a plurality of inspection units installed at predetermined intervals on the conveyor and detecting defects of the LCD panel; And an inverting device installed between any two of the inspection units to flip the LCD panel upside down, wherein at least one side of the plurality of inspection units irradiates light in an inclined direction with respect to the surface of the LCD panel and the illumination unit. It is provided with a line scan camera which faces the means so as to face a direction which deviates from the light reflection position of the LED panel.
본 발명은 LCD패널을 복수의 검사부를 경유하도록 이송하여 LCD패널의 외형라인 손상, 상/하 표면의 돌출되거나 함입된 손상 및 오염 등 다양한 위치 및 형태의 결함을 검사하는 것으로, 각 검사부에 구비된 라인스캔카메라가 조명수단의 빛을 반사하는 LCD패널을 일정 영역씩 스캔하여 결함부를 검출한다.The present invention is to examine the defects of various positions and forms, such as damage to the external line of the LCD panel, protruding or embedded damage and contamination of the LCD panel by transporting the LCD panel via a plurality of inspection units, The line scan camera scans the LCD panel reflecting the light of the luminaire by a predetermined area to detect defects.
특히 조명수단과 라인스캔카메라가 서로 교차하는 방향을 지향하도록 대향 설치되고, 라인스캔카메라가 LCD패널의 빛 반사지점과 이격된 지점을 스캔하도록 하여 LCD패널의 결함부를 정확하고 신속하게 검사하는 것이다.In particular, the luminaire and the line scan camera are installed to face each other in the direction of crossing each other, and the line scan camera scans a spot separated from the light reflection point of the LCD panel to accurately and quickly inspect the defects of the LCD panel.
이에 따라, LCD패널의 표면을 에어리어(area) 스캔 방식으로 단순 촬영했던 종래의 검사장치의 경우 검사속도가 늦을 뿐 아니라 결함부의 위치 및 형태에 따른 음영 발생으로 인해 검사 신뢰성이 떨어졌던 문제가 있었는데 반해, 본 발명은 검사속도가 빠르면서도 결함부의 위치 및 형태를 정확하게 검출하여 검사 신뢰성이 향상되는 장점이 있다. Accordingly, the conventional inspection apparatus that simply photographed the surface of the LCD panel by an area scan method not only had a slow inspection speed but also had a problem in that inspection reliability was deteriorated due to the occurrence of shading according to the position and shape of the defect part. , The present invention has the advantage that the inspection reliability is improved by accurately detecting the position and shape of the defect portion while the inspection speed is fast.
상기한 본 발명의 외관 검사장치에 의한 검사과정을 설명하면 다음과 같다.Referring to the inspection process by the appearance inspection apparatus of the present invention described above is as follows.
엘시디 패널이 투입되어, 엘시디 패널 상부의 카메라 및 조명수단에 의해 기준이 될 수 있는 모양이 있는 부분의 영상을 획득한다. 획득된 영상을 검사 컴퓨터에서 영상 처리 기술 중에서 형상 인식을 사용하여 엘시디 패널의 틀어진 데이터를 계산한다. 엘시디 패널의 정렬 계산 후, 모든 카메라에서 영상을 획득한다. 이렇게 각 카메라(14)에서 획득한 이미지를 영상 처리 기술을 사용하여 검사 컴퓨터에서 처리하여 엘시디 패널의 각 부분의 불량 유무를 순차적으로 검사한다. The LCD panel is input to obtain an image of a part having a shape that can be a reference by the camera and the lighting means on the LCD panel. The acquired image is calculated on the computer by using shape recognition among image processing techniques in the computer. After calculating the alignment of the LCD panel, images are acquired from all cameras. In this way, the image acquired by each
이상에서 설명한 본 발명은 전술한 실시예 및 첨부된 도면에 의해 한정되는 것이 아니고, 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 여러 가지 치환, 변형 및 변경이 가능함은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 명백할 것이다.The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.
도 1은 본 발명에 따른 엘시디패널 외관 검사장치의 전체 시스템 구성을 도시한 것이다.Figure 1 shows the overall system configuration of the LCD panel appearance inspection apparatus according to the present invention.
도 2 내지 도 4는 각 부위에 대한 불량 검사가 이루어지는 것을 도시한 것이다.2 to 4 show that the defect inspection for each part is made.
도 5 및 도 6은 엘시디패널에 발생되는 통상의 불량 양태를 나타내는 사진도이다.5 and 6 are photographic diagrams showing a typical failure mode generated in the LCD panel.
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Cited By (9)
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| CN105372856A (en) * | 2015-12-14 | 2016-03-02 | 武汉精测电子技术股份有限公司 | Multi-station aligning method and device for detecting large-screen panel based on mechanical arm |
| CN105466946A (en) * | 2014-08-25 | 2016-04-06 | 研祥智能科技股份有限公司 | Machine vision based on-line detection system and detection method thereof |
| KR102015357B1 (en) | 2018-05-18 | 2019-09-03 | 주식회사 이엔씨 테크놀로지 | Inspection apparatus for inspecting flat panel display device and stage therefor |
| KR102015356B1 (en) | 2019-01-31 | 2019-09-03 | 주식회사 이엔씨 테크놀로지 | Inspection equipment for inspecting flexible display device and stage apparatus used therein |
| CN110596921A (en) * | 2019-09-04 | 2019-12-20 | 深圳市联得自动化装备股份有限公司 | Liquid crystal display screen detection device |
| KR102071357B1 (en) | 2019-02-20 | 2020-01-30 | 주식회사 이엔씨 테크놀로지 | Inspection equipment for inspecting flexible display device and stage apparatus used therein |
| KR102071353B1 (en) | 2019-02-13 | 2020-01-30 | 주식회사 이엔씨 테크놀로지 | Inspection equipment for inspecting flexible display device and stage apparatus used therein |
| KR102329139B1 (en) | 2020-08-04 | 2021-11-23 | 주식회사 이엔씨 테크놀로지 | Stage apparatus for supporting foldable display device and inspection equipment thereof |
| KR20220021950A (en) | 2020-08-13 | 2022-02-23 | 주식회사 이엔씨 테크놀로지 | Inspection equipment for inspecting foldable display device and stage apparatus used therein |
-
2009
- 2009-12-31 KR KR1020090135889A patent/KR20110078958A/en not_active Application Discontinuation
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466946A (en) * | 2014-08-25 | 2016-04-06 | 研祥智能科技股份有限公司 | Machine vision based on-line detection system and detection method thereof |
| CN105466946B (en) * | 2014-08-25 | 2023-11-17 | 深圳市研祥智慧科技股份有限公司 | Online detection system and method based on machine vision |
| CN105372856A (en) * | 2015-12-14 | 2016-03-02 | 武汉精测电子技术股份有限公司 | Multi-station aligning method and device for detecting large-screen panel based on mechanical arm |
| KR102015357B1 (en) | 2018-05-18 | 2019-09-03 | 주식회사 이엔씨 테크놀로지 | Inspection apparatus for inspecting flat panel display device and stage therefor |
| KR102015356B1 (en) | 2019-01-31 | 2019-09-03 | 주식회사 이엔씨 테크놀로지 | Inspection equipment for inspecting flexible display device and stage apparatus used therein |
| KR102071353B1 (en) | 2019-02-13 | 2020-01-30 | 주식회사 이엔씨 테크놀로지 | Inspection equipment for inspecting flexible display device and stage apparatus used therein |
| KR102071357B1 (en) | 2019-02-20 | 2020-01-30 | 주식회사 이엔씨 테크놀로지 | Inspection equipment for inspecting flexible display device and stage apparatus used therein |
| CN110596921A (en) * | 2019-09-04 | 2019-12-20 | 深圳市联得自动化装备股份有限公司 | Liquid crystal display screen detection device |
| KR102329139B1 (en) | 2020-08-04 | 2021-11-23 | 주식회사 이엔씨 테크놀로지 | Stage apparatus for supporting foldable display device and inspection equipment thereof |
| KR20220021950A (en) | 2020-08-13 | 2022-02-23 | 주식회사 이엔씨 테크놀로지 | Inspection equipment for inspecting foldable display device and stage apparatus used therein |
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