KR20160144694A - Bending Test Apparatus for Flexible Display Device - Google Patents
Bending Test Apparatus for Flexible Display Device Download PDFInfo
- Publication number
- KR20160144694A KR20160144694A KR1020150081137A KR20150081137A KR20160144694A KR 20160144694 A KR20160144694 A KR 20160144694A KR 1020150081137 A KR1020150081137 A KR 1020150081137A KR 20150081137 A KR20150081137 A KR 20150081137A KR 20160144694 A KR20160144694 A KR 20160144694A
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- Prior art keywords
- flexible display
- display device
- roller
- fixing
- back plate
- Prior art date
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- 238000005452 bending Methods 0.000 title claims abstract description 80
- 230000003287 optical effect Effects 0.000 claims description 27
- 238000000034 method Methods 0.000 claims 11
- 230000000694 effects Effects 0.000 abstract description 7
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
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Classifications
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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
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/08—Testing mechanical properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
-
- 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
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The present invention discloses a flexible display device bending test apparatus. The flexible display device bending test apparatus of the present invention includes: a curvature adjusting unit for adjusting a bending angle of a flexible display device; Roller fixing means disposed on both sides of the curvature adjusting portion and fixing the flexible display device; A back plate for fixing the roller fixing means; And a photosensor disposed above the curvature control unit.
Therefore, the flexible display apparatus bending test apparatus of the present invention can acquire the light amount information corresponding to the number of bending or bending times of the flexible display apparatus, and has an effect of precisely evaluating the life characteristics and the durability of the flexible display apparatus .
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a flexible display device banding tester, and more particularly to a flexible display device banding tester capable of precisely measuring the lifetime of a display device by measuring the amount of light while bending or bending the flexible display device repeatedly .
2. Description of the Related Art In general, a flat panel display device includes a liquid crystal display (LCD), a plasma display panel (PDP), an electrophoretic display device, and an organic light emitting display (OLED) . They are thinner and lighter than conventional cathode ray tube displays (CRTs) and can operate with low power and low driving voltage and are used in various electronic devices.
Particularly, the electrophoretic display and the organic light emitting diode display (OLED) are advantageous in that the layers formed on the substrate are organic layers having elasticity, have a high response speed, have a high luminous efficiency, a high luminance and a wide viewing angle, Technology is easy to apply.
In recent years, flexible display devices capable of flexing and bending by replacing the substrate used in the flat panel display with a flexible substrate have been actively developed. The flexible display device is provided with a bendable display device flexibly bent at a predetermined angle, a collapsible foldable display device, a rollable display device that can be rolled up like a paper, And a stretchable display device.
The flexible display device basically has a characteristic that the display device is bent or curved. When the flexible display device is bent or bent repeatedly, unlike the area where the display device is bent or bent, a problem of degradation of the screen product occurs.
Therefore, when the flexible display device is bent or bent repeatedly, it is necessary to quickly analyze the image quality difference occurring sequentially in the flexural region of the flexible display device, and to measure the lifetime of the flexible display device.
This is because the lifetime is shorter than when the flexible display device is bent or bent by repeatedly bending or bending the flexible display device for a long period of time, so it is necessary to analyze and grasp the durability that the flexible display device can withstand and the change in physical properties of the device configuration.
Based on the above analysis, it is possible to develop device structure material selection or manufacturing method change for enhancing the durability of the flexible display device, which can serve as a basis for extending the life of the flexible display device.
Further, based on the above analysis, it is possible not only to improve the physical durability of the flexible display device but also to reduce the image quality degradation due to warping by supplying the compensated pixel signal to the pixels corresponding to the bent or bent region.
However, in the prior art, the life of the flexible display device due to bending or bending (the degree of degradation of the screen quality, etc.) is primarily bent or flexed repeatedly on the flexible circuit display device, And the flexible display devices were individually inspected.
Therefore, when the flexible display device is bent or bent repeatedly, there is a disadvantage in that it can not be concretely understood whether the durability limit is exceeded at any stage and whether the element constitution material changes.
Therefore, there have been limitations in developing appropriate effective remedies for measuring the life span and extending the life span of the flexible display device.
An object of the present invention is to provide a flexible display device bending test apparatus capable of measuring the light amount of a flexible display device while bending or bending the flexible display device repeatedly.
It is another object of the present invention to provide a flexible display device bending test apparatus capable of collecting light quantity information corresponding to the number of times of bending or bending of a flexible display device and accurately evaluating the life characteristics and durability of the flexible display device There is a purpose.
According to an aspect of the present invention, there is provided a bending test apparatus for a flexible display device including: a curvature adjusting unit for adjusting a bending angle of a flexible display device; Roller fixing means disposed on both sides of the curvature adjusting portion and fixing the flexible display device; A back plate for fixing the roller fixing means; And a photosensor disposed above the curvature control unit.
The position sensor unit may further include a photosensor supporting unit that overlaps with the curvature adjusting unit and includes the optical sensor. The position sensor unit is disposed at one side of the back plate, and counts the number of times the back plate is repeated up and down. And a driving unit for supplying a power for repetitively moving the back plate in the vertical direction.
The roller fixing means includes a pair of first roller portions and a second roller portion, wherein the first roller portion or the second roller portion includes first and second rollers, respectively, and the first roller And the second roller portion are opposed to each other with the flexible display device therebetween.
The back plate may have a plurality of fixing holes to which the roller fixing means may be fixed, the plurality of fixing holes may be divided into first fixing holes and second fixing holes, And a flexible display unit fixed on the flexible display unit corresponding to the curvature adjusting unit, wherein the back plate comprises a horizontal wing portion and a body portion having a U shape from the wing portion, And a portion of the back plate is located between the wing portions of the back plate.
INDUSTRIAL APPLICABILITY The flexible display device bending test apparatus of the present invention has an effect that the light amount of the flexible display device can be measured while bending or bending the flexible display device repeatedly.
Further, the flexible display apparatus bending test apparatus of the present invention is capable of collecting light quantity information corresponding to the number of times of warping or bending of the flexible display apparatus, and thus has an effect of precisely evaluating the life characteristics and the durability of the flexible display apparatus .
1 is a perspective view showing a flexible display device bending test apparatus according to the present invention.
2 is a front view of a flexible display device bending test apparatus according to the present invention.
3A is a view showing a roller fixing means used in the flexible display apparatus bending test apparatus of the present invention.
3B is a view showing a state in which the flexible display device is fixed using the roller fixing means according to the present invention.
4A is a view showing a structure of a back plate of a flexible display device bending test apparatus according to the present invention.
4B is a view showing a state in which the roller fixing means is fastened to the back plate of the present invention.
5 is an exploded perspective view of an optical sensor support unit, a flexible display unit fixing unit, and a curvature control unit of the flexible display apparatus bending test apparatus of the present invention.
6A and 6B are views showing the fastening structure of the flexible display device fixing portion and the curvature adjusting portion of the flexible display device bending test apparatus of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.
The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.
In the case where the word 'includes', 'having', 'done', etc. are used in this specification, other parts can be added unless '~ only' is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.
In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.
In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.
In the case of a description of a temporal relationship, for example, if the temporal relationship is described by 'after', 'after', 'after', 'before', etc., May not be continuous unless they are not used.
The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.
It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other, partially or wholly, technically various interlocking and driving, and that the embodiments may be practiced independently of each other, It is possible.
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.
FIG. 1 is a perspective view showing a flexible display apparatus bending test apparatus according to the present invention, and FIG. 2 is a front view of a flexible display apparatus bending test apparatus according to the present invention.
1 and 2, a flexible display device
The curvature adjuster 130 has a cylindrical structure and can control the degree of bending or bending of the
For example, when the radius R of the
Conversely, when the radius R of the
Therefore, in the flexible display device
In addition, the optical
The flexible display
Therefore, the
In the present invention, the
The
The
Therefore, since the
The
Since the
The fixing holes formed in the
A
Therefore, since the number of repetitions of the
In the present invention, the flexural or bending test is performed on the
Although not shown in the drawings,
The concrete operation of the flexible display device bending
First, the
That is, the roller fixing means 300 is fixed to both sides of the
The position of the roller fixing means 300 may be adjusted according to the degree of curvature of the
When the
The degree of fixation of the
Power is supplied to the
At this time, the
As described above, the
When the
As described above, when the
Although not shown in the drawing, the
In addition, the
Therefore, the flexible display device bending
That is, in the present invention, since the amount of light corresponding to the number of times of flexing or bending the
As described above, the flexible display device bending
FIG. 3A is a view showing a roller fixing means used in the flexible display device bending test apparatus of the present invention, FIG. 3B is a view showing a state in which the flexible display device is fixed using the roller fixing means according to the present invention, FIG. 4A is a view showing a structure of a back plate of a flexible display device bending test apparatus according to the present invention, and FIG. 4B is a view showing a state in which a roller fixing means is fastened to a back plate of the present invention.
Referring to FIGS. 3A to 4B, the
However, in the present invention, the sizes of the first and
The width of the rollers of the
The roller fixing means 300 may be constituted by a pair of first and
The
The
The roller fixing means 300 having the above-described configurations is arranged to face the
3B, the
The roller fixing means 300 is provided at one side of the supporting
The roller fixing means 300 fixed to the
Therefore, the
4A and 4B, the
The
A plurality of first and second fixing holes H1 and H2 are formed at a boundary between the
The position of the roller fixing means 300 can be variously selected depending on the degree of bending or bending of the
Since the
As shown in the figure, the
FIG. 5 is an exploded perspective view of an optical sensor support, a flexible display fixture, and a curvature control unit of the flexible display apparatus bending test apparatus of the present invention. FIGS. 6A and 6B are views showing a flexible display apparatus And the curvature control portion.
5 to 6B, the flexible display device bending
A second open area B is formed at the center of the flexible display
Therefore, the flexible display
A
The
Referring to FIGS. 6A and 6B together with FIG. 1, the flexible display
1, a
The second open area B formed at the center of the flexible display
The fixing
Therefore, even if the thickness of the flexible display device to be subjected to the lifetime measurement is different, the
As described above, the flexible display device bending test apparatus of the present invention has an effect that the light amount of the flexible display device can be measured while bending or bending the flexible display device repeatedly.
Further, the flexible display apparatus bending test apparatus of the present invention is capable of collecting light quantity information corresponding to the number of times of warping or bending of the flexible display apparatus, and thus has an effect of precisely evaluating the life characteristics and the durability of the flexible display apparatus .
100: Flexible display device Banding test apparatus
101: Base frame
120:
130: Curvature control unit
150:
135: Flexible display device fixing part
180: Light sensor
185: optical sensor support
300: Roller fixing means
Claims (12)
Roller fixing means disposed on both sides of the curvature adjusting portion and fixing the flexible display device;
A back plate for fixing the roller fixing means; And
A flexible display device bending test apparatus including an optical sensor disposed on the upper portion of the curvature adjusting unit
Further comprising a photosensor support portion superimposed on the curvature adjusting portion and having the optical sensor disposed therein.
Further comprising a position sensor unit disposed at one side of the back plate and counting the number of times the back plate is repeated up and down.
And a driving unit for supplying power for repeatedly moving the back plate in the vertical direction.
Wherein the roller fixing means comprises a pair of first roller portions and a second roller portion.
Wherein the first roller portion or the second roller portion includes a first roller and a second roller, respectively.
Wherein the first roller portion and the second roller portion of the roller fixing means face each other with the flexible display device interposed therebetween.
Wherein the back plate is formed with a plurality of fixing holes through which the roller fixing means can be fixed.
Wherein the plurality of fixing holes are divided into first fixing holes and second fixing holes, and the first fixing holes and the second fixing holes are parallel to each other.
And a flexible display device fixing portion disposed on the flexible display device corresponding to the curvature adjusting portion.
Wherein the back plate comprises a horizontal wing portion and a body portion having a U-shape from the wing portion.
Wherein the curvature adjusting unit is positioned between the wing portions of the back plate.
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KR1020150081137A KR101728014B1 (en) | 2015-06-09 | 2015-06-09 | Bending Test Apparatus for Flexible Display Device |
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KR1020150081137A KR101728014B1 (en) | 2015-06-09 | 2015-06-09 | Bending Test Apparatus for Flexible Display Device |
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Cited By (8)
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CN107860561A (en) * | 2017-11-09 | 2018-03-30 | 黎建军 | A kind of flexible display screen flexural property measurement apparatus |
CN110095338A (en) * | 2019-05-13 | 2019-08-06 | 京东方科技集团股份有限公司 | Test fixture |
WO2019231268A1 (en) * | 2018-05-31 | 2019-12-05 | 단국대학교 천안캠퍼스 산학협력단 | Device and method for folding/unfolding test capable of evaluating reliability of foldable substrate quantitatively |
US10557781B2 (en) * | 2017-08-28 | 2020-02-11 | Wuhan China Star Optoelectronics Semiconductor Display Technoloy Co., Ltd. | Bending test device and system for flexible display device |
KR20210014868A (en) * | 2019-07-31 | 2021-02-10 | 주식회사 코보텍 | Apparatus for sensing bending power and jig for use thereof |
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KR20230076505A (en) * | 2021-11-24 | 2023-05-31 | 현대제철 주식회사 | Roll forming simulation test device |
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KR100735491B1 (en) | 2005-10-28 | 2007-07-04 | 삼성전기주식회사 | Drop test evaluation apparatus for device having external electrodes and drop test evaluation method therefor |
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2015
- 2015-06-09 KR KR1020150081137A patent/KR101728014B1/en active IP Right Grant
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US10557781B2 (en) * | 2017-08-28 | 2020-02-11 | Wuhan China Star Optoelectronics Semiconductor Display Technoloy Co., Ltd. | Bending test device and system for flexible display device |
CN107860561A (en) * | 2017-11-09 | 2018-03-30 | 黎建军 | A kind of flexible display screen flexural property measurement apparatus |
WO2019231268A1 (en) * | 2018-05-31 | 2019-12-05 | 단국대학교 천안캠퍼스 산학협력단 | Device and method for folding/unfolding test capable of evaluating reliability of foldable substrate quantitatively |
KR20190136760A (en) * | 2018-05-31 | 2019-12-10 | 단국대학교 천안캠퍼스 산학협력단 | Test Appratus for Folding/Unfolding Facility for Quantitative Reliability Evaluation on Foldable substrate |
CN110095338A (en) * | 2019-05-13 | 2019-08-06 | 京东方科技集团股份有限公司 | Test fixture |
CN110095338B (en) * | 2019-05-13 | 2022-02-22 | 京东方科技集团股份有限公司 | Test fixture |
KR20210014868A (en) * | 2019-07-31 | 2021-02-10 | 주식회사 코보텍 | Apparatus for sensing bending power and jig for use thereof |
KR20230076505A (en) * | 2021-11-24 | 2023-05-31 | 현대제철 주식회사 | Roll forming simulation test device |
CN114577450A (en) * | 2022-02-23 | 2022-06-03 | 武汉华星光电半导体显示技术有限公司 | Panel laminating alignment jig |
CN114577450B (en) * | 2022-02-23 | 2024-04-12 | 武汉华星光电半导体显示技术有限公司 | Panel laminating counterpoint tool |
CN114577451A (en) * | 2022-02-24 | 2022-06-03 | 苏州华星光电技术有限公司 | Method for testing service life of display panel |
CN114577451B (en) * | 2022-02-24 | 2023-08-01 | 苏州华星光电技术有限公司 | Method for testing service life of display panel |
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