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WO2019231268A1 - Dispositif et procédé de test de pliage/dépliage permettant d'évaluer quantitativement la fiabilité d'un substrat pliable - Google Patents

Dispositif et procédé de test de pliage/dépliage permettant d'évaluer quantitativement la fiabilité d'un substrat pliable Download PDF

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Publication number
WO2019231268A1
WO2019231268A1 PCT/KR2019/006549 KR2019006549W WO2019231268A1 WO 2019231268 A1 WO2019231268 A1 WO 2019231268A1 KR 2019006549 W KR2019006549 W KR 2019006549W WO 2019231268 A1 WO2019231268 A1 WO 2019231268A1
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WO
WIPO (PCT)
Prior art keywords
folding
substrate
foldable substrate
foldable
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2019/006549
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English (en)
Korean (ko)
Inventor
한관영
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industry Academic Cooperation Foundation of Dankook University
Original Assignee
Industry Academic Cooperation Foundation of Dankook University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Industry Academic Cooperation Foundation of Dankook University filed Critical Industry Academic Cooperation Foundation of Dankook University
Publication of WO2019231268A1 publication Critical patent/WO2019231268A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/30—Collimators

Definitions

  • the present invention quantitatively folds and unfolds the foldable substrate by folding and unfolding the foldable substrate in a manner of rotating the support substrate left, right, up, and down.
  • Folding / unfolding test for accurate evaluation in real time and quantitative reliability evaluation on foldable boards to accurately determine when micro-crack occurred in the folded part
  • folding and unfolding are the main technologies and very important characteristics in the substrate material.
  • the foldable substrate is folded and the blood is subjected to a myriad of operations to check whether there are no abnormalities in the folding part, thereby evaluating the quality of the good and the defective.
  • the foldable substrate mounted on the display support substrate moves left and right to evaluate the folding characteristics.
  • the present invention is to solve the conventional problems as described above, the object of the present invention is to accurately measure the folding characteristics by reflecting the radius R in the bent portion when used as a product, the number of times the folding
  • the present invention provides a folding and unfolding test apparatus and method capable of quantitatively evaluating reliability in a foldable substrate that can accurately measure whether it rapidly deteriorates.
  • the folding / unfolding test apparatus for achieving the above object is a product that supports both sides of the foldable substrate and is installed so as to be relatively rotatable in the direction of each other to repeatedly perform the operation of folding and unfolding the foldable substrate.
  • a folding / unfolding portion having a first supporting substrate and a second supporting substrate;
  • a light emitter is installed outside the folded portion of the foldable substrate and emits light, and the light is installed inside the folded portion of the foldable substrate and is emitted from the light emitter and then transmitted through the folded portion of the foldable substrate.
  • An optical measuring / detecting unit including a photodetector in which the amount of light is measured; And inputting the total number of times the foldable substrate is folded by the relative rotation of the first and second support substrates, and operating the light emitter and the photodetector for each specified number of folding times to measure the amount of light to be folded by the number of folding times. And a controller configured to quantify the degree of cracking of the double substrate.
  • the folding / unfolding test apparatus is provided on the outer side of the folded portion of the foldable substrate to photograph the surface of the folded portion of the foldable substrate during operation of the light emitting device and the photodetector to obtain a micrograph
  • the apparatus may further include a surface measuring unit having a measuring microscope.
  • the size of the radius of the folded portion in the foldable substrate may be controlled by the distance between the first support substrate and the second support substrate.
  • the photodetector is movably installed in an area corresponding to the inside of the portion where the foldable substrate is folded and an area located outside the rotation radius of the foldable substrate when the foldable substrate is unfolded, so that the foldable substrate is folded and unfolded.
  • the foldable substrate is moved to a region corresponding to the inside of the folded portion to detect the amount of light, and after the detection of the amount of light can be controlled to return to the area located outside the rotation radius of the foldable substrate.
  • a convex lens may be installed at the front end of the photodetector to convert light into a parallel light while passing through the folded portion of the foldable substrate.
  • the photodetector is positioned outside the rotation radius of the foldable substrate when the foldable substrate is folded, and then moves to an area corresponding to the inside of the portion where the foldable substrate is folded when the foldable substrate is unfolded.
  • the amount of light may be detected and controlled to return to the area outside the rotation radius of the foldable substrate when the amount of light detection is completed.
  • the folding / unfolding characteristics of the foldable display can be evaluated quantitatively and in real time, and it can be determined precisely at which point in time the micro crack in the folded portion occurs.
  • the present invention can be significantly widened by applying not only a foldable display but also a rollable display.
  • FIG. 1 is a schematic diagram of an apparatus for testing folding characteristics in a conventional foldable substrate.
  • FIG. 2 is a view schematically showing a test method by the folding / unfolding test apparatus according to an embodiment of the present invention.
  • FIG. 3 is a view showing a test method for folding and unfolding evaluation with a foldable display or foldable substrate S.
  • FIG. 4 is a view schematically showing the overall configuration of the folding / unfolding test apparatus according to an embodiment of the present invention.
  • FIG. 5 is a view illustrating various embodiments of performing a folding / unfolding evaluation test on a foldable substrate using a folding / unfolding test apparatus according to the present invention.
  • FIG. 6 is a schematic diagram in which light from the light emitter reaches the exit light detector.
  • Fig. 7 is a diagram showing a photodetector equipped with a convex lens for making outgoing light into parallel light.
  • Fig. 8 shows data taken as a reference before folding the foldable display (substrate).
  • FIG. 10 is data indicating the degree of cracking by quantitatively analyzing the comparison data of FIGS. 8 and 9.
  • 11 is a flow chart showing a process progress command system in the folding reliability measurement facility.
  • the folding / unfolding test apparatus includes: a folding / unfolding unit configured to rotate relative to a first support substrate and a second support substrate supporting a foldable substrate; For quantitative evaluation of the foldable substrate, the light emitter is located outside the folded portion of the folded portion of the foldable substrate and the photodetector is located inside the folded portion to measure the amount of light, thereby real time or predetermined folding.
  • An optical measuring / detecting unit for measuring in accordance with an unfolding recovery specification;
  • a surface measuring unit configured to automatically measure a surface according to a folding / unfolding number of times when the microscope is positioned at the top of the folding unit;
  • a controller for inputting the number of times of folding, detecting the amount of light using a light emitter and a photodetector for each number of times of folding, and quantifying the degree of cracking of the substrate for each number of times of folding. Quantitative measurement is possible in real time.
  • FIG. 2 is a view schematically showing a test method by the folding / unfolding test apparatus according to an embodiment of the present invention
  • Figure 3 is a folding and unfolding evaluation with a foldable display or foldable substrate (S)
  • Figure 4 is a view showing a test method for
  • Figure 4 schematically shows the overall configuration of the folding / unfolding test apparatus according to an embodiment of the present invention
  • Figure 5 uses the folding / unfolding test apparatus shown in FIG. To show the various embodiments of performing a folding / unfolding evaluation test of the foldable substrate.
  • a first support substrate 11 and a first support substrate 11 supporting lower portions of both sides of a foldable substrate S may be provided in a folding / unfolding part of a folding / unfolding test apparatus according to an embodiment of the present invention.
  • the two support substrates 12 are installed to be relatively rotatable in the direction of each other.
  • the first support substrate 11 is foldable while being relatively rotated in the left and right directions on the drawing with respect to the second support substrate 12.
  • the substrate S is rotated about its central substrate axis to implement folding and unfolding operations.
  • the first support substrate 11 is rotated in the left and right directions with respect to the second support substrate 12 to fold and unfold the foldable substrate S.
  • the folding operation may be implemented, but on the contrary, the second support substrate 12 may be rotated relative to the first support substrate 11 to implement folding and unfolding operations of the foldable substrate S. 11) and the second support substrate 12 may be simultaneously rotated to implement folding and unfolding operations of the foldable substrate S (see FIG. 5).
  • the radius R of the folded portion of the foldable substrate S can be controlled quantitatively, and secondly, the third influence on the foldable substrate S is excluded due to the contraction force and the tensile force in the folded portion. Thus, it becomes possible to objectify evaluation.
  • the folded portion (folded portion) of the central portion of the foldable substrate S is shown.
  • the light emitter 13 is disposed outside the upper part (upper part of the drawing), and the excess amount of light emitted from the light emitting part 13 is placed inside the folded part of the central part of the foldable substrate S (lower part of the drawing).
  • the photodetector 16 which detects is arrange
  • the surface measuring unit is configured by mounting a surface measuring microscope 14 for measuring the surface state in the folded portion outside the folded portion of the central portion of the foldable substrate (S).
  • the light is emitted from the light emitter 13, and the emitted light passes through the folded portion of the folded substrate S to go straight and enter the photodetector 16.
  • the folded portion of the foldable substrate S maintains the radius R, light having a straightness that is misaligned due to reflection and scattering may be emitted.
  • a convex lens 15 may be provided at the front end of the photodetector 16 that detects the emitted light as shown in FIG. 7 to generate parallel light to be incident on the photodetector 16. .
  • the test can be performed by temporarily stopping work in the unfolded state after folding and controlling the light detector 16 to be located in the automatically folded part to detect light.
  • the photodetector 16 may be completely fixed to a region corresponding to the inside of the portion where the foldable substrate S is folded, but when the radius R of the portion where the foldable substrate S is folded is small, the The photodetector 16 is movably installed in a region corresponding to the inside of the portion where the foldable substrate S is folded and in an area located outside the rotation radius of the foldable substrate S, so that the foldable substrate S is provided.
  • the foldable substrate S When folded, it is located in an area outside the rotation radius of the foldable substrate S, and when the foldable substrate S is unfolded, the foldable substrate S moves to an area corresponding to the inside of the folded portion to detect an amount of light. When the light amount detection is completed, the foldable substrate S and the photodetector 16 may be eliminated by returning to the area outside the rotation radius of the foldable substrate S again. This will be described in more detail with reference to the process flowchart shown in FIG. 11.
  • FIG. 11 illustrates a process of performing a folding and unfolding reliability evaluation test using the folding / unfolding test apparatus of the present invention.
  • the total folding at the input terminal of the control unit before starting the test apparatus is performed.
  • n e.g. 3000 times
  • the number of times of measurement folding e.g. 10 times
  • the photodetector 16 moves to the original position after measuring the transmitted light.
  • the detected photodetector 16 may be fixed in one position without moving.
  • the mechanical folding / unfolding operation of the foldable substrate S is started through the relative rotation of the first supporting substrate 11 and the second supporting substrate 12.
  • the photodetector 16 measures the amount of emitted light again and takes a photograph of the microscope surface of the portion folded by the surface measuring microscope 14 to obtain an image. The operation will be repeated. After the measurement operation is repeated for each specified number of folding times, the measurement is terminated.
  • FIG. 8 shows the light quantity data measured as a reference value before the initial folding. As the time progresses, the light amount is saturated with a certain intensity. The amount of light saturated thus becomes a reference data for comparative evaluation with data to be measured.
  • FIG. 9 the light quantity of the emitted light after repeating as many times as the number of times which set folding and unfolding is shown as (b) in FIG.
  • FIG. 10 is a graph showing the degree of cracking in the folded portion determined by the equation for calculating the degree of cracking. Referring to FIG. 10, it was found that micro-crack in the folded portion of the foldable substrate S occurs from about 90 times of folding times. As such, it is possible to accurately determine the timing of occurrence of micro cracks in the folded portion by measuring the amount of emitted light. In addition, the micrographs at this point allow the surface cracks to be measured and evaluated as image data.
  • the present invention it is possible to accurately evaluate the folding / unfolding characteristics in a foldable display in quantitative and real time. As the display is developed, it is expected that the application range will be greatly widened if the display is expanded to not only a foldable display but also a rollable display.
  • the present invention performs a foldable and unfolding test on a foldable substrate during the manufacturing process of a device using a flexible display substrate to quantitatively and in real time (folding / unfolding characteristics of the foldable substrate). can be used to accurately evaluate in real time.

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

Abstract

La présente invention concerne un dispositif de test de pliage/dépliage susceptible d'évaluer la fiabilité d'un substrat pliable de manière quantitative, ledit substrat pliable étant plié/déplié par rotation d'un substrat de support vers la gauche/vers la droite/vers le haut/vers le bas, des caractéristiques de pliage pouvant être mesurées avec précision tout en reflétant le rayon (R) au niveau de la partie qui se plie lorsqu'elle est utilisée dans un produit, permettant ainsi de mesurer le nombre exact de pliages qui déclenchent une dégradation abrupte. Le dispositif de test de pliage/dépliage de la présente invention comprend : une partie de pliage/dépliage comprenant deux substrats de support conçus rotatifs pour supporter un substrat pliable; une partie de mesure/détection de lumière comprenant un émetteur de lumière positionné au-dessus d'une partie pliée à des fins d'évaluation quantitative et un détecteur de lumière positionné au-dessous de la partie de pliage de façon à mesurer la quantité de lumière en temps réel ou sur la base d'une désignation de nombre de pliage/dépliage prédéfinie; une partie de mesure de surface comprenant un microscope positionné sur l'extrémité supérieure de la partie de pliage de façon à mesurer automatiquement la surface sur la base de la désignation de numéro de pliage/dépliage; et une partie de commande. En conséquence, une mesure quantitative en temps réel d'évaluation de pliage/dépliage d'un substrat pliable est possible.
PCT/KR2019/006549 2018-05-31 2019-05-31 Dispositif et procédé de test de pliage/dépliage permettant d'évaluer quantitativement la fiabilité d'un substrat pliable Ceased WO2019231268A1 (fr)

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Application Number Priority Date Filing Date Title
KR10-2018-0062890 2018-05-31
KR1020180062890A KR102140717B1 (ko) 2018-05-31 2018-05-31 폴더블 기판에서 정량적인 신뢰성 평가가 가능한 폴딩/언폴딩 시험 장치 및 방법

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CN113483694A (zh) * 2021-06-30 2021-10-08 北京航空航天大学 结构光三维测量设备
CN116046427A (zh) * 2022-12-26 2023-05-02 湖北三江航天红阳机电有限公司 一种折叠机构展开时间试验的测试装置
CN119268679A (zh) * 2024-03-05 2025-01-07 荣耀终端有限公司 一种测量方法、测量装置、存储介质及电子设备

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KR102788590B1 (ko) * 2024-07-04 2025-04-01 주식회사 지에스아이 박막 글라스 벤딩 테스트 장치 및 이를 이용한 벤딩 테스트 방법

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KR101527815B1 (ko) 2015-01-15 2015-06-10 주식회사 지엔티시스템즈 폴더블 디스플레이 접힘검사장치 및 이를 이용한 접힘검사방법
KR101843874B1 (ko) 2017-01-09 2018-03-30 (주)플렉시고 플렉시블소재 내구성 평가용 폴딩장치

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Publication number Priority date Publication date Assignee Title
US20020024677A1 (en) * 2000-08-23 2002-02-28 Leonard Metcalfe Method and apparatus for scanning lumber and other objects
KR20100068734A (ko) * 2008-12-15 2010-06-24 (주)워프비전 인쇄회로기판의 불량 확인방법
KR20160032382A (ko) * 2014-09-15 2016-03-24 삼성디스플레이 주식회사 표시장치용 구부림 시험 장치
KR20160144694A (ko) * 2015-06-09 2016-12-19 한밭대학교 산학협력단 플렉서블 표시장치 밴딩 시험장치
KR101762141B1 (ko) * 2016-06-15 2017-07-28 주식회사 이노테크 플렉서블 디스플레이의 벤딩 시험 장치

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113483694A (zh) * 2021-06-30 2021-10-08 北京航空航天大学 结构光三维测量设备
CN116046427A (zh) * 2022-12-26 2023-05-02 湖北三江航天红阳机电有限公司 一种折叠机构展开时间试验的测试装置
CN119268679A (zh) * 2024-03-05 2025-01-07 荣耀终端有限公司 一种测量方法、测量装置、存储介质及电子设备

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KR102140717B1 (ko) 2020-08-03

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