CN112858326B - Flexible display inspection device and flexible display inspection method using same - Google Patents
Flexible display inspection device and flexible display inspection method using same Download PDFInfo
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- CN112858326B CN112858326B CN201911192325.3A CN201911192325A CN112858326B CN 112858326 B CN112858326 B CN 112858326B CN 201911192325 A CN201911192325 A CN 201911192325A CN 112858326 B CN112858326 B CN 112858326B
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- 238000007689 inspection Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims description 33
- 238000001179 sorption measurement Methods 0.000 claims abstract description 82
- 230000007547 defect Effects 0.000 claims abstract description 46
- 230000002950 deficient Effects 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims 2
- 238000005452 bending Methods 0.000 description 12
- 238000009792 diffusion process Methods 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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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
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
An inspection apparatus of an embodiment of the present invention, which distinguishes a flexible display from defects, includes: the adsorption platform adsorbs the flexible display and comprises a first adsorption part and a second adsorption part, wherein the first adsorption part is positioned in a diagonal area, and the second adsorption part is positioned in a diagonal area perpendicular to the first adsorption part; and a light source that irradiates light to the flexible display; wherein, the adsorption platform includes: a mounting frame, in which a plurality of through holes are formed in the first adsorption part and the second adsorption part; and an adsorption port arranged on one side of the mounting frame, for applying adsorption force through the through hole to adsorb and hold the flexible display, and selectively applying adsorption force to the first adsorption part and the second adsorption part.
Description
Technical Field
The present invention relates to a flexible display inspection device and a flexible display inspection method using the same, and more particularly, to a flexible display inspection device and a flexible display inspection method using the same, which are related to a partial pneumatic system that adsorbs only a part of a display to distinguish a defect.
Background
In the past, flat panel displays have been widely used as displays for products such as cellular phones, notebook computers, televisions, and computer displays. However, as technology advances, flexible displays (flexible displays) are being developed, which can achieve the same image quality even when folded or bent.
However, the flexible display has more defects than the conventional flat panel display because the flexible display is more difficult to manufacture. In the manufacturing process of the flexible display, appearance defects such as corner bending, stamping, cracking, scoring, and the like frequently occur, and thus a worker performs defect inspection to detect the appearance defects.
Disclosure of Invention
(Problems to be solved)
The technical problem to be achieved by the present invention is to provide a flexible display inspection device and a flexible display inspection method using the same, which can perform inspection with high accuracy when inspecting appearance defects of a flexible display.
(Means for solving the problems)
An inspection apparatus of an embodiment of the present invention, which distinguishes a flexible display from defects, includes: the adsorption platform adsorbs the flexible display and comprises a first adsorption part and a second adsorption part, wherein the first adsorption part is positioned in a diagonal area, and the second adsorption part is positioned in a diagonal area perpendicular to the first adsorption part; and a light source that irradiates light to the flexible display; wherein, the adsorption platform includes: a mounting frame, in which a plurality of through holes are formed in the first adsorption part and the second adsorption part; and an adsorption port arranged on one side of the mounting frame, for applying adsorption force through the through hole to adsorb and hold the flexible display, and selectively applying adsorption force to the first adsorption part and the second adsorption part.
The present invention may further include a control part that performs control to distinguish whether or not there is a defect by first applying an adsorption force to the flexible display by the first adsorption part and then applying an adsorption force to the flexible display by the second adsorption part.
In an embodiment of the present invention, a method for inspecting a flexible display includes the steps of: mounting the flexible display on an adsorption platform; adsorbing the first and third quadrant regions; distinguishing the second and fourth quadrant areas to have no defects; desorbing the first and third quadrant regions and adsorbing the second and fourth quadrant regions; and distinguishing the first and third quadrant regions from each other.
(Effects of the invention)
The flexible display inspection device of an embodiment of the invention can improve reliability and accuracy when inspecting appearance defects of a flexible display.
Drawings
Fig. 1 is a perspective view of a flexible display inspection device according to an embodiment of the present invention.
Fig. 2 is a bottom view illustrating the mounting bracket and the suction port of fig. 1.
Fig. 3 is an exploded view of the flexible display inspection device of fig. 1.
Fig. 4 is a flow chart of a flexible display inspection method according to an embodiment of the present invention.
Fig. 5 is a view showing a conventional non-pneumatic inspection method for a flexible display to inspect a corner bending defect of the flexible display.
Fig. 6 is a view showing a conventional non-pneumatic inspection method for inspecting a flexible display for a single defect.
Fig. 7 is a view showing a conventional non-pneumatic inspection method for inspecting a flexible display for a mark defect.
Fig. 8 is a view showing a conventional inspection method for inspecting a flexible display using an all-pneumatic system, wherein a corner bending defect of the flexible display is inspected.
Fig. 9 is a view showing a conventional inspection method for inspecting a flexible display using an all-pneumatic system for inspecting a single defect of the flexible display.
Fig. 10 is a screen of inspecting a flexible display for a mark defect by a conventional flexible display inspection method of an all-pneumatic system.
Fig. 11 is a view illustrating a corner bending defect inspection of a flexible display according to an embodiment of the present invention.
Fig. 12 is a view showing an inspection of a single defect of a flexible display using a flexible display inspection method according to an embodiment of the present invention.
Fig. 13 is a screen for inspecting a flexible display for a mark defect by a flexible display inspection method according to an embodiment of the present invention.
(Description of the reference numerals)
100 Flexible display inspection device 110: an adsorption platform is arranged on the upper surface of the adsorption platform,
111: Mounting rack, 112: an adsorption port is arranged on the bottom of the adsorption tank,
113: Adsorption frame 120: light source
130: Diffusion section 140: main frame
D: flexible display D1: first quadrant
D2: second quadrant D3: third quadrant
D4: fourth quadrant
Detailed Description
Embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art to which the present invention pertains can easily implement the present invention. However, the present invention may be embodied in a variety of different forms and is not limited to the embodiments described herein.
For convenience of explanation, for the apparatus for inspecting the flexible display D, it is assumed that the flexible display D is divided into four quadrants with reference to the X-axis and the Y-axis orthogonal to the X-axis, the left upper end portion region is referred to as a first quadrant D1, and the clockwise quadrants starting from the first quadrant D1 may be referred to as a second quadrant D2, a third quadrant D3, and a fourth quadrant D4.
The flexible display inspection device 100 according to an embodiment of the present invention can determine the defect of the flexible display D, including the adsorption platform 110 and the light source 120, while adsorbing only a portion of the flexible display D by partial pneumatic force.
The adsorption stage 110 may adsorb only a portion of the flexible display D by partial pneumatic in a state where the flexible display D is mounted. The partial pneumatic force disclosed in the present specification means that the suction force is applied to the suction stage 110 corresponding to the region located in the diagonal direction with reference to the flexible display D, not the entire region. That is, as an example, the flexible display D is adsorbed only at the adsorption stage 110 corresponding to the areas of the first quadrant D1 and the third quadrant D3 of the flexible display D. As another example, the flexible display D may be adsorbed only at the adsorption stage 110 corresponding to the areas of the second quadrant D2 and the fourth quadrant D4 of the flexible display D.
As an example, the adsorption stage 110 has a first adsorption portion 110a in a region corresponding to the first and third quadrants D1 and D3 of the flexible display D and a second adsorption portion 110b in a region corresponding to the second and fourth quadrants D2 and D4. The adsorption stage 110 may sequentially adsorb and hold the flexible display D through the first and second adsorption parts 110a and 110b.
The adsorption stage 110 adsorbs only a portion of the flexible display D, clearly exposing defects such as a mark, a scratch, etc., and thus precisely inspecting the unadsorbed portion.
The suction platform 110 includes a mounting frame 111 and a suction port 112. The mount 111 mounts the flexible display D, and is formed with a plurality of through holes 111a to which suction force can be applied. The through hole 111a is formed in the region of the first suction portion 110a and the second suction portion 110 b. The through holes 111a are not limited in size and number, but are formed according to the size, shape and vacuum pressure of the flexible display D, and can stably absorb and hold the flexible display D.
The mounting 111 may be in the shape of a transparent plate, for example, may be composed of glass or acrylic. The mounting frame 111 may be formed in a regular quadrangle, a right square quadrangle, a circular shape according to the shape of the object to be inspected, but is not limited thereto.
In addition, the surface of the mounting frame 111 may be antistatic-treated, and the flexible display D may be prevented from being damaged due to static electricity.
The suction port 112 is disposed at the lower portion of the mounting frame 111, and applies suction force through the through hole 111a of the mounting frame 111. The suction port 112 may be connected to a vacuum pump (not shown) and may apply suction to the mounted flexible display D.
The suction port 112 may divide a region corresponding to the first suction portion 110a and a region corresponding to the second suction portion 110b, and sequentially apply suction force. The suction port 112 may include a first suction port 1121 and a second suction port 1122, the first suction port 1121 applying suction force to the through hole 111a corresponding to the first suction portion 110a, and the second suction port 1122 applying suction force to the through hole 111a of the region corresponding to the second suction portion 110 b.
As an example, the suction port 112 applies suction force to the region corresponding to the first suction portion 110a through the first suction port 1121 to suck and hold the first quadrant D1 and the third quadrant D3 of the flexible display D, and may not apply suction force to the second suction portion 110 b.
For another example, the suction port 112 applies suction force to the region corresponding to the second suction portion 110b through the second suction port 1122, and sucks and holds the second quadrant D2 and the fourth quadrant D4 of the flexible display D, but suction force may not be applied to the first suction portion 110 a.
However, the above example is only an example for explaining the structure of the suction port 112, and does not exclude that the suction force is applied to the first suction portion 110a and the second suction portion 110b at the same time.
The adsorption stage 110 may further include an adsorption frame 113 coupled to the adsorption port 112. The suction frame 113 is coupled to the mounting frame 111, and may form a predetermined sealed space inside. As an example, the suction frame 113 is formed in a container shape with a depressed central portion. However, it is not limited thereto, but may be made in a regular quadrangle, a right-angled quadrangle, a circle, or the like to correspond to the shape of the mounting portion. The adsorption frame 113 may be made of plastic such as bakelite or acrylic so as to be lightweight and have a predetermined strength.
The light source 120 provides light to the flexible display D for clearly finding defects of the flexible display D. As an example, the light source 120 may provide illumination to the flexible display D at a lower portion of the flexible display D. The light source 120 may be one of a light emitting Diode (LED; LIGHT EMITTING Diode), a CC FL (Cold Cathode Fluorescent Lamp, a cold cathode fluorescent lamp), an EEFL (External Elec trode FluorescentLamp, an external electrode fluorescent lamp), but is not limited thereto. Preferably, an LED, which can be driven at a low voltage, a low current, and with high efficiency, is used as the light source 120. The light source 120 has a shape corresponding to the shape of the flexible display D, and thus can uniformly irradiate light to all sides of the flexible display D.
As another example, the light source 120 may be disposed at an upper portion of the adsorption stage 110 to irradiate light on the flexible display D.
The flexible display inspection device 100 of an embodiment of the present invention may further include a control part (not shown). The control part (not shown) performs control to distinguish whether or not there is a defect by applying an adsorption force to the flexible display D through the first adsorption part 110a, and then to distinguish whether or not there is a defect by applying an adsorption force to the flexible display D through the second adsorption part 110 b.
The control part (not shown) controls the adsorption port 112 to partially adsorb the flexible display D sequentially through the first and second adsorption parts 110a and 110b, and the adsorption force can be adjusted according to the adsorption state of the flexible display D.
The flexible display inspection device 100 of an embodiment of the present invention may further include a diffusion portion 130, a main frame 140. The diffusion section 130 is disposed between the light source 120 and the suction stage 110, and can uniformly irradiate the flexible display D, which is the subject to be inspected, with light. For example, if the light source 120 is led illumination, the straightness is strong, and the phenomenon that light is concentrated only in a part may occur, so that the light may be dispersed through the diffusion portion 130.
Typically, the diffuser 130 is larger than the light source 120, and may be constructed of a diffusion film of PET material, for example.
The main frame 140 may house and fix the mounting frame 111, the suction port 112, and the light source 120 inside. As an example, the main frame 140 may be made of lightweight and strong aluminum.
The flexible display inspection method according to an embodiment of the present invention may be implemented using the flexible display inspection apparatus 100 described above. In order to improve accuracy in discriminating defects such as bending, folding, foreign matter mixing, etc. of the flexible display D, the flexible display inspection method adsorbs only a part of the flexible display D, and then judges whether or not the remaining surface not adsorbed is defective.
The flexible display inspection method includes: the flexible display D mounting step, the first and third quadrant D1, D3 adsorbing step, the second and fourth quadrant D2, D4 inspecting step, the second and fourth quadrant D2, D4 adsorbing step, and the first and third quadrant D1, D3 inspecting step.
First, the flexible display D is mounted on the mounting frame 111 in the mounting step. At this time, in order to smoothly perform the process, the flexible display D is mounted in the mounting frame 111 in a regular arrangement (1010).
The first and third quadrant D1, D3 sucking step sucks and holds the first and third quadrants D1, D3 of the flexible display D through the through holes 111a corresponding to the first suction portion 110a area of the suction port 112. At this time, the degree of adsorption may be adjusted according to the state of the adsorbed flexible display D (1020).
The second and fourth quadrant D2, D4 checking step judges whether or not the second and fourth quadrants D2, D4 that are not adsorbed are defective in a state that the first and third quadrants D1, D3 of the flexible display D are adsorbed and held (1030).
The first and third quadrants D1, D3 inspection step is to desorb the first and third quadrants D1, D3 from the flexible display D and to adsorb and hold the second and fourth quadrants D2, D4 (1040).
The first and third quadrants D1, D3 inspection step adsorbs and holds the second and fourth quadrants D2, D4 and then determines if the first and third quadrants D1, D3 are defective (1050).
Fig. 5 is a view showing a conventional non-pneumatic inspection method for a flexible display to inspect a corner bending defect of the flexible display. Fig. 6 is a view showing a conventional non-pneumatic inspection method for inspecting a flexible display for a single defect. Fig. 7 is a view showing a conventional non-pneumatic inspection method for inspecting a flexible display for a mark defect.
Referring to fig. 5 to 7, it can be seen that the luminance difference between the respective screens is large in the conventional non-pneumatic flexible display inspection method. This is because the bending degree of the flexible display D as the inspection object is greatly changed to be dark, and thus a portion that cannot be recognized by the camera appears. Accordingly, in the case of inspecting the flexible display D by the non-pneumatic method, if there is a defect such as a corner bend, a single body, or a notch in a portion which cannot be recognized by the camera due to darkening, it is difficult to detect the defect.
Fig. 8 is a view showing a conventional inspection method for inspecting a corner bending defect of a flexible display D by using an all-pneumatic system. Fig. 9 is a view showing a conventional inspection method for inspecting a flexible display D using an all-pneumatic system for inspecting a single defect. Fig. 10 is a screen of inspecting a conventional flexible display D for a mark defect by using a flexible display inspection method of an all-pneumatic system.
Referring to fig. 8 to 10, the conventional inspection method of the flexible display of the all-pneumatic system applies an adsorption force to the entire surface of the flexible display D, and adsorbs and stretches not only the portion having no defect but also the portion having corner bending, single body and mark defect. Therefore, the inspection method using the full pneumatic flexible display device which applies the suction force to the whole surface of the flexible display device D may ignore the defect and fail to detect the defect.
Fig. 11 is a view illustrating a corner bending defect inspection of a flexible display D according to an embodiment of the present invention. Fig. 12 is a view showing an inspection of a single defect of the flexible display D by the flexible display inspection method according to an embodiment of the present invention. Fig. 13 is a view showing a method for inspecting a flexible display D for a mark defect according to an embodiment of the present invention.
Referring to fig. 11 to 13, since the non-adsorbed surface can be inspected when the partial pneumatic system is used, the problem of the whole pneumatic system does not occur, and the adsorbed surface reduces the degree of bending of the non-adsorbed surface, reduces the brightness difference, and thus there is no portion not recognized by the camera. Accordingly, the inspection method of an embodiment of the present invention solves the problems of the full pneumatic mode and the non-pneumatic mode, and further can more accurately distinguish the corner bending, the single body and the mark stamping defects of the flexible display D.
While the preferred embodiment of the present invention has been described in detail, the scope of the claims of the present invention is not limited thereto, and various modifications and improvements of the basic concept of the present invention as defined in the scope of the claims are also included in the scope of the claims of the present invention.
Claims (3)
1. A flexible display inspection apparatus for distinguishing the presence of defects in a flexible display, comprising:
an adsorption platform for adsorbing a flexible display and comprising a first adsorption part and a second adsorption part, wherein the flexible display is divided into a first quadrant region, a second quadrant region, a third quadrant region and a fourth quadrant region by taking an X axis and a Y axis which are orthogonal with the X axis as a reference, the adsorption platform is provided with the first adsorption part in a region corresponding to the first quadrant region and the third quadrant region, and is provided with the second adsorption part in a region corresponding to the second quadrant region and the fourth quadrant region; and
A light source that irradiates light to the flexible display;
Wherein, the adsorption platform includes:
A mounting frame, in which a plurality of through holes are formed in the first adsorption part and the second adsorption part; and
An adsorption port arranged on one side of the mounting frame, for applying adsorption force through the through hole to adsorb and hold the flexible display, and selectively applying adsorption force to the first adsorption part and the second adsorption part,
When the flexible display is absorbed by the first absorption part, distinguishing whether the second quadrant area and the fourth quadrant area have defects; and when the flexible display is absorbed by the second absorption part, distinguishing the first quadrant area and the third quadrant area from each other.
2. The flexible display inspection device of claim 1, further comprising:
And a control unit that controls whether the flexible display is defective or not by applying an adsorption force to the flexible display by the first adsorption unit, and whether the flexible display is defective or not by applying an adsorption force to the flexible display by the second adsorption unit.
3. A flexible display inspection method applied to the flexible display inspection apparatus according to claim 1, for distinguishing the presence of defects in a flexible display, comprising the steps of, when dividing the flexible display into first to fourth quadrant regions with reference to an X-axis and a Y-axis orthogonal to the X-axis:
mounting the flexible display on an adsorption platform;
Adsorbing the first and third quadrant regions;
Distinguishing the second and fourth quadrant areas to have no defects;
Desorbing the first and third quadrant regions and adsorbing the second and fourth quadrant regions; and
The first and third quadrant regions are resolved to be defect-free.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911192325.3A CN112858326B (en) | 2019-11-28 | 2019-11-28 | Flexible display inspection device and flexible display inspection method using same |
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| CN201911192325.3A CN112858326B (en) | 2019-11-28 | 2019-11-28 | Flexible display inspection device and flexible display inspection method using same |
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| CN112858326A CN112858326A (en) | 2021-05-28 |
| CN112858326B true CN112858326B (en) | 2024-06-07 |
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| JP2003282684A (en) * | 2002-03-22 | 2003-10-03 | Olympus Optical Co Ltd | Glass board supporting jig |
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| CN103376059A (en) * | 2012-04-26 | 2013-10-30 | 技佳唯斯股份有限公司 | Optical inspection device |
| CN203950092U (en) * | 2013-06-25 | 2014-11-19 | 株式会社日本显示器 | The testing fixture of display panels |
| JP2015055588A (en) * | 2013-09-13 | 2015-03-23 | 株式会社ロゼフテクノロジー | Wafer side surface inspection apparatus |
| CN107686232A (en) * | 2016-08-05 | 2018-02-13 | 三星钻石工业股份有限公司 | The time difference cutting method of glass substrate |
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2019
- 2019-11-28 CN CN201911192325.3A patent/CN112858326B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW473626B (en) * | 1997-10-24 | 2002-01-21 | Sharp Kk | Manufacturing method of liquid crystal display element and manufacturing apparatus of the same |
| JP2000208990A (en) * | 1999-01-19 | 2000-07-28 | Matsushita Electric Ind Co Ltd | Data preparation method and electronic parts mounting apparatus |
| JP2003282684A (en) * | 2002-03-22 | 2003-10-03 | Olympus Optical Co Ltd | Glass board supporting jig |
| TW201243316A (en) * | 2007-05-23 | 2012-11-01 | Lasertec Corp | Substrate holding apparatus |
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| CN112858326A (en) | 2021-05-28 |
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