JP2007132911A - System for sensing vision and luminance of back light unit - Google Patents

System for sensing vision and luminance of back light unit Download PDF

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JP2007132911A
JP2007132911A JP2005344923A JP2005344923A JP2007132911A JP 2007132911 A JP2007132911 A JP 2007132911A JP 2005344923 A JP2005344923 A JP 2005344923A JP 2005344923 A JP2005344923 A JP 2005344923A JP 2007132911 A JP2007132911 A JP 2007132911A
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blu
luminance
vision
examination room
main body
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JP4354941B2 (en
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Young Ho Hur
永浩 許
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Taesan LCD Co Ltd
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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J2001/0485—Cosinus correcting or purposely modifying the angular response of a light sensor
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F2202/00—Materials and properties

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To simultaneously measure the luminance of an upper part and a lower part in an inspection process on the vision of a Back Light Unit (BLU) for LCD by acquiring images of the BLU by cameras and mounting upper and lower luminance measuring devices to vision inspection equipment for inspecting defects of the BLU in a system for sensing the vision and luminance of BLUs. <P>SOLUTION: The system is constituted of a main body provided with an inspection chamber; a lighting jig reciprocated along a guide rail of the main body and mounted with a BLU in such a way as to be lighted; a camera for capturing vertical images by vertical line scanning of the BLU via the inspection chamber; a camera for capturing angle-of-field images by line scanning at an inclined angle of the BLU via the inspection chamber; an image processing means for processing images captured by the cameras and detecting defects of the BLU; and an output means for displaying defects of the BLU detected by the image processing means. The system further includes an upper-part luminance measuring device mounted to an upper part on the exit side of the inspection chamber for measuring the luminance of the upper part of the BLU mounted to the lighting jig and transferred through the inspection chamber along the guide rail. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、カメラにより、ＬＣＤ（Ｌｉｑｕｉｄ ｃｒｙｓｔａｌ ｄｉｓｐｌａｙ）用のバックライトユニット（ＢＬＵ；Ｂａｃｋ Ｌｉｇｈｔ Ｕｎｉｔ、以下、ＢＬＵと称する）の映像を獲得し、ＢＬＵの欠陥を検査するビジョン検査装備に上／下輝度測定器をさらに設けることによって、ＢＬＵのビジョン検査過程で上／下輝度（Ｌｕｍｉｎａｎｃｅ）を同時に測定することができるバックライトユニットのビジョン及び輝度検出システムに関する。   The present invention obtains an image of a backlight unit (BLU) for LCD (Liquid crystal display) by a camera, and is used in a vision inspection equipment for inspecting a defect of the BLU. The present invention relates to a vision and luminance detection system for a backlight unit, which can further measure luminance at the same time in the BLU vision inspection process by further providing a luminance measuring device.

さらに詳しくは、点灯治具上にＢＬＵが装着されてから、ビジョン検査室を通過する際、ＢＬＵに対して９０°の角度及び傾斜角度でラインスキャニングする垂直映像獲得用カメラ及び視野角映像獲得用カメラによりＢＬＵの各種欠陥を検査すると共に、ビジョン装備に取り付けられた上／下輝度測定器によりＢＬＵの上／下輝度を測定し得るようにしたバックライトユニットのビジョン及び輝度検出システムに関する。この際、前述したＢＬＵの欠陥としては、点欠陥（例えば、黒点、白点）、線欠陥（スクラッチ）、異物、斑などを含む。   More specifically, when a BLU is mounted on a lighting jig and then passes through the vision inspection room, a vertical image acquisition camera and a viewing angle image acquisition that perform line scanning at an angle and an inclination angle of 90 ° with respect to the BLU. The present invention relates to a vision and luminance detection system for a backlight unit that can inspect various defects of a BLU with a camera and can measure the upper / lower luminance of the BLU with an upper / lower luminance measuring device attached to the vision equipment. At this time, the aforementioned defects of the BLU include point defects (for example, black spots and white spots), line defects (scratches), foreign matters, spots, and the like.

一般に、ＬＣＤなどのようなディスプレー装置には、光源から出る光を平面化し照射せしめる装置としてＢＬＵを用いるが、ＢＬＵは、光を発生させる光源と、光源からの光を全面に亘って均一にする導光板と、導光板の背面側から漏れる光を再び導光板側に反射させる反射板と、導光板を介して前面側向きの光を拡散させる拡散板と、その他偏光板などからなる積層構造を有している。   In general, a display device such as an LCD uses a BLU as a device for flattening and irradiating light emitted from a light source. The BLU makes a light source that generates light and light from the light source uniform over the entire surface. A laminated structure consisting of a light guide plate, a reflection plate that reflects light leaking from the back side of the light guide plate back to the light guide plate side, a diffusion plate that diffuses light facing the front side through the light guide plate, and other polarizing plates Have.

前述したように、ＢＬＵを製造する際には、光源を含む導光板に反射板、拡散板、偏光板などを積層することになるが、それぞれの板等の間に異物などが入り込むか、又は、斑やスクラッチのある導光板、反射板、拡散板、及び偏光板が積層され得るため、ＢＬＵに異物、黒点、白点、斑、スクラッチなどのような各種欠陥が生じる不具合があった。   As described above, when manufacturing a BLU, a light reflector including a light source is laminated with a reflection plate, a diffusion plate, a polarizing plate, etc., but foreign matter or the like enters between the respective plates, or In addition, since the light guide plate, the reflection plate, the diffusion plate, and the polarizing plate having spots and scratches can be laminated, various defects such as foreign matters, black spots, white spots, spots, and scratches are generated in the BLU.

図１に示されるように、従来技術によるＢＬＵビジョン検査装置は、出入口と、検査室１の形成された本体２と、本体２の内部に形成されたガイドレール３に沿って往復移動され、ＢＬＵ４が点灯可能に装着された点灯治具５と、検査室１の内部に設けられ、ＢＬＵ４を垂直にラインスキャニングする垂直映像獲得用カメラ６と、検査室１の内部に設けられ、ＢＬＵ４を傾斜角でラインスキャニングする視野角映像獲得用カメラ７と、本体２の下部に設けられ、カメラにより得られた映像を処理し、ＢＬＵ４の欠陥を検出する映像処理手段８と、本体２の外側面に設けられ、映像処理手段８により検出された欠陥を表示する出力手段９とを含む。   As shown in FIG. 1, the BLU vision inspection apparatus according to the prior art is reciprocated along a doorway, a main body 2 in which an inspection chamber 1 is formed, and a guide rail 3 formed in the main body 2. Is mounted inside the examination room 1 and is provided inside the examination room 1 and is provided inside the examination room 1 with a vertical image acquisition camera 6 that vertically scans the BLU 4 and tilting the BLU 4 at an inclination angle. A viewing angle image acquisition camera 7 for line scanning at the bottom of the main body 2, a video processing means 8 for processing a video obtained by the camera and detecting defects in the BLU 4, and an external surface of the main body 2. Output means 9 for displaying the defects detected by the video processing means 8.

前述した点灯治具５上にＢＬＵ４を装着した後、点灯治具５の印刷回路基板（図示せず）にＢＬＵを接触して、点灯させる。ガイドレール３に沿って、点灯治具５が検査室１の内部を通過する間、垂直映像獲得用カメラ６と、視野角映像獲得用カメラ７とを介してＢＬＵを垂直及び傾斜角でそれぞれラインスキャニングする。   After mounting the BLU 4 on the lighting jig 5 described above, the BLU is brought into contact with a printed circuit board (not shown) of the lighting jig 5 to light it. While the lighting jig 5 passes through the inside of the examination room 1 along the guide rail 3, the BLU is lined in the vertical and tilt angles via the vertical image acquisition camera 6 and the viewing angle image acquisition camera 7. Scan.

前述したカメラ６、７のラインスキャニングと、映像処理手段８の映像処理とにより、ＢＬＵ４の白点などのような欠陥が検出でき、それからＢＬＵ４は、出口を介して検査室１から抜け出る。この際、検査室１の外側面に取り付けられた出力手段９に、ＢＬＵの持つ欠陥が表示でき、且つ、プリンターにより出力される。これにより、作業者は、ＢＬＵ４に不良があるか否かを判する。   Defects such as white spots of the BLU 4 can be detected by the above-described line scanning of the cameras 6 and 7 and the video processing of the video processing means 8, and then the BLU 4 exits from the inspection room 1 through the exit. At this time, the defects of the BLU can be displayed on the output means 9 attached to the outer surface of the examination room 1 and output by the printer. Thereby, the operator determines whether or not the BLU 4 is defective.

前述したように、ビジョン検査装備を介してＢＬＵの欠陥のみを検査した後、輝度測定仕様のＢＬＵは、また別の工程で輝度測定用治具を用い、作業者による手作業で輝度を直接測定して、データの管理を行うため、作業能率が劣り、作業性や生産性が低下することになる。   As described above, after inspecting only BLU defects via the vision inspection equipment, the BLU of the luminance measurement specification directly measures the luminance manually by the operator using a luminance measurement jig in another process. Since data is managed, work efficiency is inferior, and workability and productivity are reduced.

さらに、手作業でＢＬＵの輝度を測定した場合、作業者個人の現場経験及び熟練度などによってＢＬＵの輝度測定方法（測定距離及び角度をいう）と、輝度測定ポイントと、輝度測定時間などとに微細な違いが生じ、輝度測定値に対する信頼性が劣るという問題点をも持っていた。   Furthermore, when the BLU brightness is measured manually, the BLU brightness measurement method (referred to as measurement distance and angle), brightness measurement point, brightness measurement time, etc., depending on the individual field experience and skill level of the worker. There was also a problem that a small difference occurred and the reliability of the luminance measurement value was poor.

従って、本発明の目的は、ＢＬＵの欠陥を検出するビジョン検査と、ＢＬＵの輝度を測定する作業とを一元化及び自動化することから、別のエージング（ａｇｉｎｇ）を必要とせず、ＢＬＵ製造工程を単純化することによって作業能率が向上でき、作業性及び生産性に格段に優れたバックライトユニットのビジョン及び輝度検出システムを提供することにある。   Accordingly, an object of the present invention is to unify and automate the vision inspection for detecting defects in the BLU and the work for measuring the brightness of the BLU, so that no separate aging is required and the BLU manufacturing process is simplified. It is an object of the present invention to provide a vision and luminance detection system for a backlight unit that can improve the work efficiency and can be improved in workability and productivity.

本発明の他の目的は、ＢＬＵの輝度測定を自動化し、ＢＬＵの客観的測定値を確保することから、製品に対する信頼度を向上させることが可能なバックライトユニットのビジョン及び輝度検出システムを提供することにある。   Another object of the present invention is to provide a vision and luminance detection system for a backlight unit that can improve the reliability of the product by automating the luminance measurement of the BLU and ensuring the objective measurement value of the BLU. There is to do.

また、本発明の他の目的は、検出可能な全てのＢＬＵの輝度測定データを自動に貯蔵し得るため、ＢＬＵの生産日、モデル型、ロット別データベースの管理が簡単且つ容易なバックライトユニットのビジョン及び輝度検出システムを提供することにある。   Another object of the present invention is to automatically store the brightness measurement data of all detectable BLUs, so that the backlight unit can be easily and easily managed for the BLU production date, model type, and lot-specific database. To provide a vision and brightness detection system.

さらに、本発明の他の目的は、ビジョン検査装備によりＢＬＵの欠陥を検査した後、ＢＬＵのアンローディング（ｕｎｌｏａｄｉｎｇ）状態でＢＬＵの輝度を測定することによって、測定値の誤差を最小化し得るようにしたバックライトユニットのビジョン及び輝度検出システムを提供することにある。   Further, another object of the present invention is to measure the BLU brightness in the unloading state of the BLU after inspecting the defect of the BLU by the vision inspection equipment, so that the error of the measurement value can be minimized. It is to provide a vision and luminance detection system for a backlight unit.

前述した本発明の目的は、検査室の備えられた本体と、本体のガイドレールに沿って往復移動され、ＢＬＵが点灯可能に装着される点灯治具と、検査室を経由するＢＬＵを垂直にラインスキャニングする垂直映像獲得用カメラと、検査室を経由するＢＬＵを傾斜角でラインスキャニングする視野角映像獲得用カメラと、カメラにより得られた映像を処理し、ＢＬＵの欠陥を検出する映像処理手段と、映像処理手段により検出されたＢＬＵの欠陥を表示する出力手段とから構成されるバックライトユニットのビジョン及び輝度検出システムにおいて、検査室の出口側上部に取り付けられ、点灯治具に装着されてガイドレールに沿って検査室を通過するＢＬＵの上部輝度を測定する上部輝度測定器をさらに含むことを特徴とするバックライトユニットのビジョン及び輝度検出システムを提供することによって達成される。   The above-described object of the present invention is to vertically move a main body provided with an inspection room, a lighting jig that is reciprocated along a guide rail of the main body so that the BLU can be lighted, and a BLU that passes through the inspection room. A vertical image acquisition camera that performs line scanning, a viewing angle image acquisition camera that performs line scanning of the BLU that passes through the examination room at an inclination angle, and a video processing means that processes the image obtained by the camera and detects defects in the BLU And a vision and luminance detection system for a backlight unit composed of an output means for displaying a defect of the BLU detected by the video processing means, attached to the upper part on the exit side of the examination room, and attached to a lighting jig. The backlight unit further includes an upper luminance measuring device for measuring the upper luminance of the BLU passing through the examination room along the guide rail. It is achieved by providing a capital of vision and brightness detection system.

また、本発明の目的は、検査室の備えられた本体と、本体のガイドレールに沿って往復移動され、ＢＬＵが点灯可能に装着される点灯治具と、検査室を経由するＢＬＵを垂直にラインスキャニングする垂直映像獲得用カメラと、検査室を経由するＢＬＵを傾斜角でラインスキャニングする視野角映像獲得用カメラと、カメラにより得られた映像を処理し、ＢＬＵの欠陥を検出する映像処理手段と、映像処理手段により検出されたＢＬＵの欠陥を表示する出力手段とから構成されるバックライトユニットのビジョン及び輝度検出システムにおいて、検査室の出口側上部に取り付けられ、前記点灯治具に装着されてガイドレールに沿って検査室を通過するＢＬＵの上部輝度を測定する上部輝度測定器及び、点灯治具に設けられ、点灯治具に装着されてガイドレールに沿って検査室を通過するＢＬＵの下部輝度を測定する下部輝度測定器をさらに含むことを特徴とするバックライトユニットのビジョン及び輝度検出システムを提供することによって達成される。   Another object of the present invention is to vertically align a main body provided with an inspection room, a lighting jig that is reciprocated along a guide rail of the main body so that the BLU can be lighted, and a BLU that passes through the inspection room. A vertical image acquisition camera that performs line scanning, a viewing angle image acquisition camera that performs line scanning of the BLU that passes through the examination room at an inclination angle, and a video processing means that processes the image obtained by the camera and detects defects in the BLU And a vision and luminance detection system for a backlight unit composed of an output means for displaying a defect of the BLU detected by the video processing means, attached to the upper part of the exit side of the examination room and attached to the lighting jig. The upper brightness measuring instrument that measures the upper brightness of the BLU passing through the examination room along the guide rail and the lighting jig are mounted on the lighting jig. Are achieved by providing a vision and brightness detection system of the backlight unit, characterized by further comprising a lower luminance measuring device for measuring a lower luminance of the BLU passing laboratory along the guide rails Te.

この際、前述した上部輝度測定器は、ＢＬＵの寸法によって測定距離及び角度を変更調節し得るべく、ＢＬＵに対して水平方向及び上下方向にそれぞれ移動可能に本体に装着される。   At this time, the above-described upper luminance measuring device is mounted on the main body so as to be movable in the horizontal and vertical directions with respect to the BLU so that the measurement distance and angle can be changed and adjusted according to the size of the BLU.

前述したように、本発明によるバックライトユニットのビジョン及び輝度検出システムは、ＢＬＵの欠陥を検出するビジョン検査と、ＢＬＵの輝度を測定する作業とを一元化及び自動化することによって、別のエージングタイム（ａｇｉｎｇ ｔｉｍｅ）を必要とせず、ＢＬＵ製造工程を単純化することから、大量生産による価格競争力を持つことができる。   As described above, the vision and luminance detection system of the backlight unit according to the present invention integrates and automates the vision inspection for detecting the defect of the BLU and the operation of measuring the luminance of the BLU, thereby providing another aging time ( aging time) and simplifying the BLU manufacturing process, it is possible to have price competitiveness by mass production.

また、ＢＬＵの輝度測定を自動化し、ＢＬＵの客観的輝度測定値を確保することによって、製品の信頼度を向上させることができる。さらに、検出可能な全てのＢＬＵの輝度測定データを自動に貯蔵し得るため、ＢＬＵの生産日、モデル型、ロット別のデータベース管理が簡単かつ容易である。   Further, the reliability of the product can be improved by automating the luminance measurement of the BLU and ensuring the objective luminance measurement value of the BLU. Furthermore, since the brightness measurement data of all detectable BLUs can be automatically stored, database management by BLU production date, model type, and lot is simple and easy.

さらに、ビジョン検査装備によりＢＬＵの欠陥を検査した後、ＢＬＵのアンローディング状態でＢＬＵ輝度を測定することから、測定値の誤差を最小化することができる。   Further, since the BLU brightness is measured in the unloaded state of the BLU after inspecting the defect of the BLU by the vision inspection equipment, the error of the measurement value can be minimized.

以下では、本発明の望ましい実施例を添付図面を参照して説明するが、これは、本発明の属する技術分野において通常の知識を有する者が容易に実施し得る程度内にて詳細に説明するためのものであって、これにより本発明の技術的思想及び範疇に限定されるものではない。   Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which will be described in detail to the extent that those skilled in the art can easily carry out the present invention. Therefore, the present invention is not limited to the technical idea and category of the present invention.

発明を実施するための形態BEST MODE FOR CARRYING OUT THE INVENTION

以下、図２、図３、図４及び図５に示されるように、本発明は、出入口と、検査室１の備えられた本体２と、駆動手段（図示せず）の駆動時、本体２の内部に設けられたガイドレール３に沿って往復移動され、ＢＬＵ４が点灯可能に図示されていない印刷回路基板（ＰＣＢ）に接続されかつ装着される点灯治具５と、点灯治具５に装着され、検査室１を経由するＢＬＵ４を垂直にラインスキャニングする垂直映像獲得用カメラ６と、点灯治具５に装着され、検査室１を経由するＢＬＵ４を傾斜角（例えば、ＢＬＵ４の各種欠陥を精度よく分別し得るべく、４０度ないし４５度に傾けて設ける）でラインスキャニングする視野角映像獲得用カメラ７と、本体２の下部に装着され、カメラ６、７により獲得（つまり、撮影のこと）された映像等を処理し、ＢＬＵ４の白点などのような各種欠陥を自動に検出する映像処理手段８と、本体２の外側面に設けられ、映像処理手段８により検出されたＢＬＵ４の欠陥類型（斑、白点、黒点、スクラッチなどを言う）を表示する出力手段９とを含むバックライトユニットのビジョン及び輝度検出システムに適用される。これらは、図１に示された構成部分と同一であるため、詳しい説明は略すと共に、重複される図面符号については同一符号を付して説明する。   Hereinafter, as shown in FIGS. 2, 3, 4, and 5, the present invention relates to the main body 2 when the entrance / exit, the main body 2 provided with the examination chamber 1, and the driving means (not shown) are driven. A lighting jig 5 that is reciprocated along the guide rail 3 provided inside the BLU 4 and connected to and mounted on a printed circuit board (PCB) (not shown) so that the BLU 4 can be lit, and a lighting jig 5 The BLU 4 passing through the inspection room 1 is mounted on the vertical image acquisition camera 6 and the lighting jig 5 and the inclination angle of the BLU 4 passing through the inspection room 1 (for example, accuracy of various defects of the BLU 4 is accurately measured). A viewing angle image acquisition camera 7 that scans the line at an angle of 40 ° to 45 ° so that it can be well separated, and a camera that is attached to the lower part of the main body 2 and acquired by the cameras 6 and 7 (that is, shooting) Recorded images etc. The image processing means 8 for automatically detecting various defects such as white spots of the BLU 4 and the defect types (the spots, white spots) of the BLU 4 provided on the outer surface of the main body 2 and detected by the video processing means 8 And output means 9 for displaying a black spot, a scratch, etc.) and applied to a vision and luminance detection system of a backlight unit. Since these are the same as the constituent parts shown in FIG. 1, detailed description will be omitted, and overlapping drawings will be described with the same reference numerals.

図２に示されるように、本発明によるバックライトユニットのビジョン及び輝度検出システムは、前述した検査室１の出口側上部に取り付けられ、点灯治具５に装着されてガイドレール３に沿って検査室１を通過するＢＬＵ４の上部輝度を測定する上部輝度測定器１０をさらに含む。   As shown in FIG. 2, the vision and luminance detection system of the backlight unit according to the present invention is attached to the upper part on the exit side of the above-described inspection room 1, mounted on the lighting jig 5, and inspected along the guide rail 3. It further includes an upper luminance measuring device 10 that measures the upper luminance of the BLU 4 passing through the chamber 1.

この際、前述した上部輝度測定器１０は、ＢＬＵ４の寸法（つまり、仕様をいう）によって、ＢＬＵ４の輝度測定距離及び角度を容易に変更調整し得るべく、本体２に水平方向及び上下方向に移動自在に取り付けられたブラケット１２に装着されることも可能である。   At this time, the upper luminance measuring instrument 10 moves in the horizontal direction and the vertical direction in the main body 2 so that the luminance measuring distance and angle of the BLU 4 can be easily changed and adjusted according to the dimensions (that is, specifications) of the BLU 4. It is also possible to attach to the bracket 12 attached freely.

以下に、本発明によるバックライトユニットのビジョン及び輝度検出システムの使用例を添付図面に基づいて詳しく説明する。図４及び図５に示されるように、前述した点灯治具５に装着のＢＬＵ４がガイドレール３に沿って検査室１を通過する際、検査室１の内部に装着されている垂直映像獲得用カメラ６によりＢＬＵ４を垂直にラインスキャニングし、また検査室内部に装着された視野角映像獲得用カメラ７によりＢＬＵ４を所定傾斜角でラインスキャニングする。   Hereinafter, a usage example of the vision and luminance detection system of the backlight unit according to the present invention will be described in detail with reference to the accompanying drawings. As shown in FIGS. 4 and 5, when the BLU 4 attached to the above-described lighting jig 5 passes through the examination room 1 along the guide rail 3, it is used for obtaining a vertical image attached to the inside of the examination room 1. The BLU 4 is line-scanned vertically by the camera 6, and the BLU 4 is line-scanned at a predetermined inclination angle by the viewing angle image acquisition camera 7 mounted inside the examination room.

前述した本体２の下部に設けられた映像処理手段８により、カメラ６、７により得られた映像を映像処理（カメラ６、７のラインスキャニング動作を制御し、該ラインスキャニングの結果をプロセッシングすることで、映像を獲得することをいう）して、ＢＬＵ４の各種欠陥を検出し、さらに本体２の外側面に設けられた出力手段９（例えば、モニタやプリンターをいう）に、ＢＬＵ４の検出された欠陥を表示する。   The video processing means 8 provided in the lower part of the main body 2 described above performs video processing on the video obtained by the cameras 6 and 7 (controls the line scanning operation of the cameras 6 and 7 and processes the result of the line scanning). In this case, various defects of the BLU 4 are detected, and the output means 9 (for example, a monitor or a printer) provided on the outer surface of the main body 2 detects the BLU 4. Display defects.

一方、駆動手段（図示略）の駆動時、ガイドレール３に沿って点灯治具５に装着されたＢＬＵ４が検査室１の出口側から抜け出る際、本体２の上部に取り付けられた上部輝度測定器１０によりＢＬＵ４の上端輝度を測定する。   On the other hand, when the driving means (not shown) is driven, when the BLU 4 mounted on the lighting jig 5 along the guide rail 3 comes out from the exit side of the examination room 1, the upper luminance measuring device attached to the upper part of the main body 2 is used. 10 to measure the upper edge luminance of the BLU4.

かくして、前述した検査室１に施されたＢＬＵビジョン検査装備によりＢＬＵ４の各種欠陥を検出する過程（ＢＬＵ４のアンローディング状態を言う）でＢＬＵ４の輝度を共に測定することによって、ＢＬＵ４の輝度測定のための別のエージングタイム（ａｇｉｎｇ ｔｉｍｅ）を不要とし、ＢＬＵ４の移送時間を短縮することによって、作業性を向上させることができる。   Thus, by measuring the brightness of the BLU 4 in the process of detecting various defects of the BLU 4 (referring to the unloading state of the BLU 4) by the BLU vision inspection equipment provided in the inspection room 1 described above, the brightness of the BLU 4 is measured. By eliminating the need for another aging time and shortening the transfer time of the BLU 4, workability can be improved.

図２及び図３に示されるように、本発明は、出入口と、検査室１の備えられた本体２と、本体のガイドレール３に沿って往復移動され、ＢＬＵ４が点灯可能に装着される点灯治具５と、点灯治具５に装着され、検査室１を経由するＢＬＵ４を垂直にラインスキャニングする垂直映像獲得用カメラ６と、点灯治具５に装着され、検査室１を経由するＢＬＵ４を傾斜角でラインスキャニングする視野角映像獲得用カメラ７と、本体２の下部に取り付けられ、カメラ６、７により獲得された映像を処理し、ＢＬＵ４の白点などの欠陥を検出する映像処理手段８と、本体２の外側面に取り付けられ、映像処理手段８により検出されたＢＬＵ４の欠陥を表示する出力手段９とを、含むバックライトユニットのビジョン及び輝度検出システムに適用される。これらは、図１に示されたものと同様であるため、詳しい説明は略すと共に、重複される図面符号については同一符号を付して説明する。   As shown in FIG. 2 and FIG. 3, the present invention is a lighting that is reciprocated along the entrance / exit, the main body 2 provided with the examination chamber 1, and the guide rail 3 of the main body so that the BLU 4 can be turned on. A jig 5 and a vertical image acquisition camera 6 that vertically scans the BLU 4 that is attached to the lighting jig 5 and passes through the inspection room 1, and the BLU 4 that is attached to the lighting jig 5 and passes through the inspection room 1 A viewing angle image acquisition camera 7 that performs line scanning at an inclination angle, and an image processing means 8 that is attached to the lower part of the main body 2 and processes images acquired by the cameras 6 and 7 to detect defects such as white spots of the BLU 4. And an output means 9 that is attached to the outer surface of the main body 2 and displays a defect of the BLU 4 detected by the video processing means 8, and is applied to a vision and luminance detection system of a backlight unit.Since these are the same as those shown in FIG. 1, detailed description will be omitted, and overlapping drawings will be described with the same reference numerals.

図３に示されるように、本発明の他の実施例によるバックライトユニットのビジョン及び輝度検出システムは、前記検査室１の出口側上部に取り付けられ、点灯治具５に装着されてガイドレール３に沿って検査室１を通過するＢＬＵ４の上部輝度を測定する上部輝度測定器１０と、点灯治具５に設けられ、点灯治具５に装着されてガイドレール３に沿って検査室１を通過するＢＬＵ４の下部輝度を測定する下部輝度測定器１１をさらに含む。   As shown in FIG. 3, the vision and brightness detection system of the backlight unit according to another embodiment of the present invention is attached to the upper part of the exit side of the examination room 1 and attached to the lighting jig 5 to guide rail 3. The upper luminance measuring device 10 that measures the upper luminance of the BLU 4 that passes through the examination room 1 along with the lighting jig 5 is mounted on the lighting jig 5 and passes through the examination room 1 along the guide rail 3. The lower luminance measuring device 11 for measuring the lower luminance of the BLU 4 is further included.

前述した上部輝度測定器１０は、ＢＬＵ４の寸法（仕様をいう）によって、ＢＬＵ４の輝度測定距離及び角度を容易に変更し調節し得るべく、本体２に水平方向及び上下方向に移動自在に取り付けられたブラケット１２に装着されることは言うまでもない。   The above-described upper luminance measuring device 10 is attached to the main body 2 so as to be movable in the horizontal direction and the vertical direction so that the luminance measuring distance and angle of the BLU 4 can be easily changed and adjusted according to the dimensions (specifications) of the BLU 4. Needless to say, the bracket 12 is mounted.

一方、前記点灯治具５に装着されたＢＬＵ４がガイドレール３に沿って検査室１を通過する際、垂直映像獲得用カメラ６と視野角映像獲得用カメラ７とにより、ＢＬＵ４をラインスキャニングすることによって、ＢＬＵ４の各種欠陥を検出することになる。そして、ガイドレール３に沿って、ＢＬＵ４が検査室１の出口側から抜け出る際、本体２の上部に取り付けられた上部輝度測定器１０を介してＢＬＵ４の上端の輝度を測定するということを除いては、図２に示された本発明の一実施例と同様であるため、詳しい説明は省略する。   On the other hand, when the BLU 4 mounted on the lighting jig 5 passes through the examination room 1 along the guide rail 3, the BLU 4 is line-scanned by the vertical image acquisition camera 6 and the viewing angle image acquisition camera 7. Thus, various defects of the BLU 4 are detected. Then, when the BLU 4 exits from the exit side of the examination room 1 along the guide rail 3, the brightness of the upper end of the BLU 4 is measured via the upper brightness measuring instrument 10 attached to the upper part of the main body 2. Since this is the same as that of the embodiment of the present invention shown in FIG.

従来技術によるバックライトユニットのビジョン検査装置の概略図である。1 is a schematic diagram of a vision inspection apparatus for a backlight unit according to the prior art. 本発明によるバックライトユニットのビジョン及び輝度検出システムの要部を抜粋した斜視図である。It is the perspective view which extracted the principal part of the vision and brightness | luminance detection system of the backlight unit by this invention. 本発明の他の実施例によるバックライトユニットのビジョン及び輝度検出システムの要部を抜粋した斜視図である。FIG. 6 is a perspective view of an essential part of a vision and luminance detection system for a backlight unit according to another embodiment of the present invention. 本発明によるバックライトユニットのビジョン及び輝度検出システムの使用状態図である。FIG. 3 is a view showing a usage state of the vision and luminance detection system of the backlight unit according to the present invention. 本発明によるバックライトユニットのビジョン及び輝度検出システムの出力装置の概略図である。1 is a schematic view of an output device of a vision and luminance detection system of a backlight unit according to the present invention. FIG.

符号の説明Explanation of symbols

１ 検査室
２ 本体
３ ガイドレール
４ ＢＬＵ（ＢＬＵ；Ｂａｃｋ Ｌｉｇｈｔ Ｕｎｉｔ）
５ 点灯治具
６ 垂直映像獲得用カメラ
７ 視野角映像獲得用カメラ
８ 映像処理手段
９ 出力手段
１０ 上部輝度測定器
１１ 下部輝度測定器 DESCRIPTION OF SYMBOLS 1 Inspection room 2 Main body 3 Guide rail 4 BLU (BLU; Back Light Unit)
DESCRIPTION OF SYMBOLS 5 Lighting jig 6 Vertical image acquisition camera 7 Viewing angle image acquisition camera 8 Image processing means 9 Output means 10 Upper luminance measuring device 11 Lower luminance measuring device

Claims (3)

検査室の備えられた本体と、本体のガイドレールに沿って往復移動され、ＢＬＵ（バックライトユニット）が点灯可能に装着される点灯治具と、検査室を経由するＢＬＵを垂直にラインスキャニングする垂直映像獲得用カメラと、検査室を経由するＢＬＵを傾斜角でラインスキャニングする視野角映像獲得用カメラと、カメラにより得られた映像を処理し、ＢＬＵの欠陥を検出する映像処理手段と、映像処理手段により検出されたＢＬＵの欠陥を表示する出力手段とからなるバックライトユニットのビジョン及び輝度検出システムにおいて、
前記検査室の出口側上部に取り付けられ、前記点灯治具に装着されてガイドレールに沿って検査室を通過するＢＬＵの上部輝度を測定する上部輝度測定器をさらに含むことを特徴とするバックライトユニットのビジョン及び輝度検出システム。 The main body provided with the examination room, the lighting jig on which the BLU (backlight unit) is mounted so as to be lit up and reciprocated along the guide rail of the main body, and the BLU passing through the examination room are line-scanned vertically. A vertical image acquisition camera, a viewing angle image acquisition camera that scans a BLU that passes through an examination room at an inclination angle, an image processing means that processes an image obtained by the camera and detects a defect of the BLU, and an image In a vision and luminance detection system for a backlight unit comprising output means for displaying defects of a BLU detected by a processing means,
The backlight further includes an upper luminance measuring device that is attached to an upper portion on the outlet side of the examination room and is mounted on the lighting jig and measures the upper luminance of the BLU passing through the examination room along the guide rail. Unit vision and brightness detection system. 検査室の備えられた本体と、本体のガイドレールに沿って往復移動され、ＢＬＵ（バックライトユニット）が点灯可能に装着される点灯治具と、検査室を経由するＢＬＵを垂直にラインスキャニングする垂直映像獲得用カメラと、検査室を経由するＢＬＵを傾斜角でラインスキャニングする視野角映像獲得用カメラと、カメラにより得られた映像を処理し、ＢＬＵの欠陥を検出する映像処理手段と、映像処理手段により検出されたＢＬＵの欠陥を表示する出力手段とからなるバックライトユニットのビジョン及び輝度検出システムにおいて、
前記検査室の出口側上部に取り付けられ、前記点灯治具に装着されてガイドレールに沿って検査室を通過する前記ＢＬＵの上部輝度を測定する上部輝度測定器及び、前記点灯治具に設けられ、前記点灯治具に装着されてガイドレールに沿って検査室を通過する前記ＢＬＵの下部輝度を測定する下部輝度測定器をさらに含むことを特徴とするバックライトユニットのビジョン及び輝度検出システム。 The main body provided with the examination room, the lighting jig on which the BLU (backlight unit) is mounted so as to be lit up and reciprocated along the guide rail of the main body, and the BLU passing through the examination room are line-scanned vertically. A vertical image acquisition camera, a viewing angle image acquisition camera that scans a BLU that passes through an examination room at an inclination angle, an image processing means that processes an image obtained by the camera and detects a defect of the BLU, and an image In a vision and luminance detection system for a backlight unit comprising output means for displaying defects of a BLU detected by a processing means,
An upper luminance measuring device that is attached to the upper exit side of the examination room, is mounted on the lighting jig and passes through the examination room along the guide rail, and is provided on the lighting jig. A vision and luminance detection system for a backlight unit, further comprising a lower luminance measuring device mounted on the lighting jig and measuring a lower luminance of the BLU passing through an examination room along a guide rail. 前記上部輝度測定器は、前記ＢＬＵの寸法によって測定距離及び角度を変更調節し得るべく、前記ＢＬＵに対して水平及び上下方向にそれぞれ移動自在に前記本体に取り付けられることを特徴とする請求項１又は請求項２に記載のバックライトユニットのビジョン及び輝度検出システム。   2. The upper luminance measuring device is attached to the main body so as to be movable in the horizontal and vertical directions with respect to the BLU so that the measurement distance and angle can be changed and adjusted according to the size of the BLU. Or the vision and brightness | luminance detection system of the backlight unit of Claim 2.
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