CN114577451A - Method for testing service life of display panel - Google Patents
Method for testing service life of display panel Download PDFInfo
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- CN114577451A CN114577451A CN202210171934.6A CN202210171934A CN114577451A CN 114577451 A CN114577451 A CN 114577451A CN 202210171934 A CN202210171934 A CN 202210171934A CN 114577451 A CN114577451 A CN 114577451A
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- 238000001514 detection method Methods 0.000 claims description 73
- 238000010998 test method Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 abstract description 25
- 239000011521 glass Substances 0.000 description 10
- 230000001133 acceleration Effects 0.000 description 5
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- 238000002474 experimental method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
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- Y02P40/00—Technologies relating to the processing of minerals
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Abstract
The embodiment of the application discloses a service life testing method of a display panel, which adopts two supporting elements to support the display panel, wherein the display panel comprises a first section, a second section and a third section which are sequentially connected, the display panel has an actual curvature radius, and the two supporting elements are arranged corresponding to the second section; pressing down the display panel by adopting a force application element to enable the display panel to be bent to a preset curvature radius, wherein the preset curvature radius is smaller than an actual curvature radius, the force application element is positioned on one side of the display panel, which is far away from the supporting elements, and the force application element is positioned between the two supporting elements; acquiring the preset service life of the display panel under the preset curvature radius; and acquiring the actual service life of the display panel according to the actual curvature radius, the preset curvature radius and the preset service life. The service life testing method of the display panel can solve the problem that service life testing stress distribution is inconsistent with actual stress distribution of products in the service life testing method of existing curved surface products.
Description
Technical Field
The application relates to the field of display, in particular to a service life testing method of a display panel.
Background
With the development of science and technology, curved surface display products enter the visual field of people. Curved display products suffer from a forming stress on the glass due to the bending of the screen, as compared to flat display products. In the actual production process, the curved surface shows that although the product can bear the bending stress for a short time, the fatigue effect under the long-term action is not clear, especially under the condition that the curvature radius is small and the glass substrate is thicker. If the design is too conservative, such as the curvature radius is large, the curved surface visual effect cannot be satisfied; if the design is too extreme, the curvature radius is very small, and the curved surface shows that the product can be broken after a period of time. This is because the substrate of the curved display product is glass of brittle material, and many micro cracks are generated during the cutting and edging process, and the breaking strength of the glass depends on the number and size of the micro cracks. Over time, microcracks at the edges of the bent glass also grow and the failure strength decreases. When the glass reaches a certain amount and size and the breaking strength cannot withstand the bending stress of the glass, the bent glass is cracked.
In order to ensure the quality of the curved surface display product and avoid the problem of fragment when the terminal client uses the curved surface display product, the curved surface display product needs to be subjected to a severe reliability test. For the verification of the strength of the curved surface, a high-curvature acceleration experiment is often adopted to evaluate the service life of the curved surface display product, i.e. the curved surface display product is bent to a higher curvature state and stands still, and the service life of the curved surface display product is recorded.
The existing high-curvature acceleration experiment adopts a pure circular arc jig, the pure circular arc jig is used for clamping a curved surface display product, so that the curved surface display product is bent to have higher curvature. In addition, the existing pure circular arc jig cannot be compatible with products with different curvatures, the curvatures of the pure circular arc jig are fixed, and the pure circular arc jig is suitable for curved surface display products with specific curvatures, so that the jig needs to be frequently manufactured according to the curved surface display products with different curvatures, and cost and time loss are caused.
Disclosure of Invention
The embodiment of the application provides a method for testing the service life of a display panel, which can solve the problem that the service life test stress distribution is inconsistent with the actual stress distribution of a product in the conventional method for testing the service life of a curved surface product, can realize equivalent detection, is favorable for accurately estimating the market reject ratio and improves the reliability of the product; meanwhile, the method can be compatible with products with different curvatures, and the manufacturing cost of the jig is reduced.
The embodiment of the application provides a method for testing the service life of a display panel, which comprises the following steps:
step B1, supporting a display panel by adopting two supporting elements, wherein the display panel has an actual curvature radius, the display panel comprises a first section, a second section and a third section which are sequentially connected, and the two supporting elements are arranged corresponding to the second section;
step B2, pressing the display panel downwards by using a force application element to bend the display panel to a preset curvature radius, wherein the preset curvature radius is smaller than the actual curvature radius, the force application element is positioned on one side of the display panel, which is far away from the support elements, and the force application element is positioned between the two support elements;
step B3, acquiring the preset service life of the display panel under the preset curvature radius;
and B4, acquiring the actual service life of the display panel according to the actual curvature radius, the preset curvature radius and the preset service life.
Optionally, in some embodiments of the present application, in the step B1, the supporting element abuts against a supporting portion of the display panel;
in step B2, the force application element abuts against a force receiving portion of the display panel, and at least two force application elements are used to press down the force receiving portion of the display panel, and all the force receiving portions are symmetrically arranged about a central axis between the two support portions.
Optionally, in some embodiments of the present application, two of the supporting portions are symmetrically disposed about a central axis of the second segment.
Optionally, in some embodiments of the present application, a distance between two of the force-receiving portions located on the outermost side satisfies the following formula:
0.45×ΔL≤L1≤0.65×ΔL；
wherein L1 is the length between the two outermost force-receiving parts, and Δ L is the length between the two support parts.
Optionally, in some embodiments of the present application, the step B2 includes:
step B21, adopting the force application element to press down the display panel;
step B22, acquiring coordinates of a first detection point and coordinates of a second detection point of the display panel, wherein the first detection point and the second detection point are positioned between the two support parts;
and step B23, acquiring the preset curvature radius of the display panel according to the coordinates of the first detection point and the coordinates of the second detection point.
Optionally, in some embodiments of the present application, in step B22, the first detection point is a midpoint between two of the supports, and the second detection point is located between the first detection point and one of the supports.
Optionally, in some embodiments of the present application, in the step B22, the second detection point overlaps with the force receiving portion.
Optionally, in some embodiments of the present application, in step B23, a relationship between the coordinates of the first detection point, the coordinates of the second detection point, and the preset radius of curvature is:
wherein, X1 is the abscissa of the first detection point, Y1 is the ordinate of the first detection point, X2 is the abscissa of the second detection point, Y2 is the ordinate of the second detection point, and R1 is the preset curvature radius.
Optionally, in some embodiments of the present application, in the step B4, the relationship between the preset radius of curvature, the preset lifetime, the actual radius of curvature and the actual lifetime is:
wherein T1 is the preset life, R1 is the preset curvature radius, T2 is the actual life, R2 is the actual curvature radius of the display panel, and n is the fatigue coefficient.
Optionally, in some embodiments of the present application, in the step B4, a value range of the fatigue coefficient n is: n is more than or equal to 15 and less than or equal to 21.
The embodiment of the application adopts a service life testing method of a display panel, two supporting elements are adopted to be supported on the second section of the display panel, and a force application element is adopted between the two supporting elements to press down the display panel so as to bend the display panel, so that the display panel is bent to be in a higher curvature state. The curved surface display product generally comprises a curved surface section and straight line sections arranged on two opposite sides of the curved surface section, in the actual use process, the stress distribution of the curved surface section is gradually increased from two sides to the middle, and the straight line sections have almost no stress. By adopting the service life testing method of the display panel, the first end and the third section of the two opposite sides of the display panel can not be bent, so that the stress distribution of the display panel in the testing process is more consistent with the actual stress distribution of the display panel, the problem that the service life testing stress distribution is inconsistent with the actual stress distribution of a product in the service life testing method of the existing curved surface product can be solved, equivalent detection can be realized, the accurate estimation of market reject ratio is facilitated, and the reliability of the product is improved; meanwhile, the method can be compatible with products with different curvatures, and the manufacturing cost of the jig is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of the operation of a high curvature acceleration experiment provided in comparative examples of the present application;
fig. 2 is a schematic stress distribution diagram of a display panel provided in an embodiment of the present application;
fig. 3 is a schematic flowchart illustrating a method for testing a lifetime of a display panel according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram illustrating the operation of step B1 provided by the embodiment of the present application;
FIG. 5 is a schematic diagram illustrating the operation of step B2 provided by the embodiment of the present application;
fig. 6 is a schematic diagram illustrating a method for testing lifetime of a display panel according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In this application, where the context requires otherwise, the words "upper" and "lower" used in relation to the device in use or operation will generally refer to the upper and lower extremities of the device, particularly as oriented in the drawing figures; while "inner" and "outer" are with respect to the outline of the device.
The embodiment of the application provides a method for testing the service life of a display panel. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
Referring to fig. 1, in order to evaluate the service life of the curved display product 1, a high curvature acceleration experiment is performed by bending the curved display product 1 to a higher curvature state and standing, and recording the service life of the curved display product 1. As shown in fig. 1 and 2, the curved display product 1 includes a curved section 11 and straight sections 12 disposed on two opposite sides of the curved section 11, and during actual use, the stress distribution of the curved section 11 gradually increases from two sides to the middle, and the straight sections 12 have almost no stress. If the pure arc jig 2 is adopted to clamp the curved surface display product 1 so that the curved surface display product 1 is bent to a higher curvature, the straight line segment 12 can be bent and bear certain stress, so that the stress distribution of the product in the testing process is greatly different from the actual stress distribution of the product, equivalent detection of the product cannot be realized, and the reliability evaluation result is reduced.
In addition, pure circular arc tool 2 can't be compatible different camber products, and the camber of pure circular arc tool 2 is fixed, is applicable to the curved surface display product 1 of specific camber, and high camber curved surface display product 1 corresponds pure circular arc tool 2's camber that is higher than the camber of low camber curved surface display product 1 corresponding pure circular arc tool 2 promptly, consequently need show product 1 according to the curved surface of different camber, needs frequent preparation tool 2, causes cost and time loss.
Referring to fig. 3, an embodiment of the present application provides a method for testing a lifetime of a display panel, including the following steps:
step B1, as shown in fig. 4, supporting the display panel 100 by using two supporting elements 200, where the display panel 100 has an actual radius of curvature, the display panel 100 includes a first segment 110, a second segment 120, and a third segment 130 connected in sequence, and the two supporting elements 200 are disposed corresponding to the second segment 120, that is, the two supporting elements 200 are supported by the second segment 120 of the display panel 100, and the first segment 110 and the third segment 130 of the display panel 100 are not in contact with the supporting elements 200;
step B2, as shown in fig. 4 and 5, pressing down the display panel 100 by using the force application element 300 to bend the display panel 100 to a preset curvature radius, where the preset curvature radius is smaller than the actual curvature radius, the force application element 300 is located on a side of the display panel 100 away from the support elements 200, and the force application element 300 is located between two support elements 200, so that a portion of the display panel 100 corresponding to a portion between two support elements 200 is bent to a higher curvature, so as to perform a life acceleration experiment;
step B3, obtaining the preset lifetime of the display panel 100 under the preset curvature radius, specifically obtaining the preset lifetime through timing, that is, when the display panel 100 is bent to the preset curvature radius in step B2, timing until the display panel 100 is broken or damaged, thereby obtaining the preset lifetime under the preset curvature radius;
and step B4, acquiring the actual service life of the display panel 100 according to the actual curvature radius, the preset curvature radius and the preset service life. In the embodiment of the present application, the first section 110 and the third section 130 are straight sections, the second section 120 is a curved section, and the first section 110 and the third section 130 are respectively connected to both sides of the second section 120.
In the method for testing the lifetime of the display panel according to the embodiment of the present application, the two support elements 200 are used to support the second segment 120 of the display panel 100, and the force application element 300 is used to press down the display panel 100 between the two support elements 200 to bend the display panel 100, so as to bend the display panel 100 to a higher curvature state. As shown in fig. 2, fig. 4 and fig. 5, in the testing process, the first end and the third section 130 at two opposite sides of the display panel 100 are not bent, so that the stress distribution of the display panel 100 in the testing process better conforms to the actual stress distribution of the display panel 100, the situation that the first section 110 and the third section 130 are too tightly detected is effectively avoided, the problem that the life test stress distribution is inconsistent with the actual stress distribution of the product in the existing life test method for curved products can be improved, equivalent detection can be realized, the accurate estimation of the market reject ratio is facilitated, and the reliability of the product is improved; meanwhile, the method can be compatible with products with different curvatures, and the manufacturing cost of the jig is reduced.
Specifically, in step B1, two supporting elements 200 are respectively disposed corresponding to two ends of the second segment 120, and of course, according to the selection of the actual situation and the specific requirement, two supporting elements 200 may be located between two ends of the second segment 120, as long as it is ensured that two supporting elements 200 are disposed corresponding to the second segment 120, which is not limited herein.
Specifically, in step B1, the supporting element 200 abuts against the supporting portion 121 of the display panel 100; in step B2, the force applying element 300 abuts on the force receiving portion 122 of the display panel 100, at least two force applying elements 300 are used to press down the force receiving portion 122 of the display panel 100, and all the force receiving portions 122 are symmetrically arranged about the central axis between the two supporting portions 121. Under this arrangement, the position of the downward pressing force applied to the display panel 100 is symmetrical about the central axis between the two support portions 121, so that the test stress distribution of the product is close to the actual stress distribution of the product, thereby achieving equivalent detection, facilitating accurate estimation of the market reject ratio, and improving the reliability of the product.
Specifically, when the even number of force application elements 300 are used to press down the display panel 100, the display panel 100 is correspondingly provided with the even number of force receiving portions 122, and the even number of force receiving portions 122 are symmetrical about the central axis between the two support portions 121; when the display panel 100 is pressed down by using an odd number of force application elements 300, the display panel 100 is correspondingly provided with an odd number of force receiving portions 122, the odd number of force receiving portions 122 are symmetrical about a central axis between the two support portions 121, specifically, the middle force receiving portion 122 is arranged corresponding to the central axis between the two support portions 121, and the force receiving portions 122 at two sides are symmetrical about the central axis between the two support portions 121.
As shown in fig. 4 and 5, when the display panel 100 is pressed down by using two force application elements 300 according to the embodiment of the present application, the display panel 100 is correspondingly provided with two force receiving portions 122 in sequence, and the first force receiving portion 122 and the second force receiving portion 122 are symmetrical about a central axis between the two supporting portions 121. When the display panel 100 is pressed down by using three force application elements 300 in the embodiment of the present application, the display panel 100 is correspondingly provided with three force receiving portions 122 in sequence, wherein the second force receiving portion 122 is disposed corresponding to the central axis between the two supporting portions 121, and the first force receiving portion 122 and the third force receiving portion 122 are symmetrical about the central axis between the two supporting portions 121. It is understood that the number of the force application elements 300 and the number of the force receiving portions 122 may be adjusted according to the selection of the actual situation and the specific requirement, and is not limited herein.
Specifically, the two force receiving portions 122 symmetrical about the central axis between the two support portions 121 receive equal pressing forces. Under this setting, the magnitude and distribution of the downward pressing force applied to the display panel 100 are symmetrical about the central axis between the two supporting portions 121, so that the test stress distribution of the product is close to the actual stress distribution of the product, thereby realizing equivalent detection, facilitating accurate estimation of the market reject ratio, and improving the reliability of the product.
Specifically, the two supporting portions 121 are symmetrically disposed about a central axis of the second segment 120. Under the arrangement, the position of the pressing force applied to the second section 120 of the display panel 100 is symmetrical about the central axis of the second section 120, so that the test stress distribution of the product is close to the actual stress distribution of the product, equivalent detection is realized, accurate estimation of the market reject ratio is facilitated, and the reliability of the product is improved.
Specifically, as shown in fig. 4 and 5, the distance between the two outermost force application elements 300 affects the high stress area ratio and the stress growth tendency, and in order to match the actual stress distribution of the product, the distance between the two outermost force receiving portions 122 satisfies the following formula:
0.45×ΔL≤L1≤0.65×ΔL；
where L1 is the length of the display panel between the two outermost force receiving portions 122, and Δ L is the length of the display panel between the two supporting portions 121. In this embodiment, by adjusting the magnitude of the pressing force, the curvature of the display panel 100 can be adjusted.
Specifically, in the embodiment of the present application, as shown in fig. 4 to fig. 6, the step B2 includes:
step B21, pressing down the display panel 100 by the force application element 300;
step B22, obtaining coordinates of a first detection point a and coordinates of a second detection point B of the display panel 100, where the first detection point a and the second detection point B are located between the two support portions 121;
and step B23, acquiring the preset curvature radius of the display panel 100 according to the coordinates of the first detection point A and the coordinates of the second detection point B. In the embodiment of the present application, after the display panel 100 is bent into the higher curvature state, the preset curvature radius of the display panel 100 in the higher curvature state is calculated from the coordinates of the first detection point a and the coordinates of the second detection point B. In the embodiment of the present application, as shown in fig. 6, under the display panel 100 in the flat state, a rectangular coordinate system is established with a midpoint between the two support portions 121 as an origin; then, the coordinates of the first detection point a and the coordinates of the second detection point B are acquired for the display panel 100 at the preset radius of curvature.
Specifically, in step B22, the first detection point a is a point on the display panel 100 that is equal to the abscissa of the midpoint between the two support portions 121, and the second detection point B is located between the first detection point a and one of the support portions 121. Of course, the specific positions of the first detection point a and the second detection point B may be modified as appropriate according to the selection and specific requirements of the actual situation, as long as the first detection point a and the second detection point B are located between the two support portions 121, and the specific limitations are not limited herein.
Specifically, in step B22, the second detection point B overlaps the force-receiving portion 122, i.e., the second detection point B is the force-receiving portion 122. Of course, the specific position of the second detecting point B may be modified as appropriate according to the selection and specific requirement of the actual situation, as long as the second detecting point B is located between the two supporting portions 121, and is not limited herein.
Specifically, in step B23, the coordinates of the first detection point a are (X1, Y1), the coordinates of the second detection point B are (X2, Y2), and the relationship between the coordinates of the first detection point a, the coordinates of the second detection point B, and the preset radius of curvature is:
wherein X1 is an abscissa of the first detection point a, Y1 is an ordinate of the first detection point a, X2 is an abscissa of the second detection point B, Y2 is an ordinate of the second detection point B, R1 is a preset curvature radius, and units of the abscissa, the ordinate and the preset curvature radius may be length measurement units such as millimeters, centimeters, decimeters or meters, which is not limited herein. In the embodiment of the present application, the preset radius of curvature may be calculated from the coordinates of the first detection point a and the coordinates of the second detection point B.
Specifically, when the first detection point a and the first detection point a are the midpoint between the two support portions 121, that is, the value of X1 is 0, that is, the coordinate of the first detection point a is (0, Y1), in this embodiment, the relationship formula between the coordinate of the first detection point a, the coordinate of the second detection point B, and the preset curvature radius is simplified as follows:
wherein, Y1 is the ordinate of the first detecting point A, X2 is the abscissa of the second detecting point B, Y2 is the ordinate of the second detecting point B, and R1 is the preset curvature radius.
Specifically, in step B4, the relationship between the preset radius of curvature, the preset lifetime, the actual radius of curvature and the actual lifetime is:
wherein T1 is the predetermined lifetime, R1 is the predetermined radius of curvature, T2 is the actual lifetime, R2 is the actual radius of curvature of the display panel 100, and n is the fatigue coefficient. In the embodiment of the present application, R2 is an actual radius of curvature of the display panel 100, and is a parameter from a factory where the actual life can be calculated through the preset radius of curvature, the preset life and the actual radius of curvature.
Specifically, in step B4, the value range of the fatigue coefficient n mainly depends on the substrate material of the display panel 100, in this embodiment, the substrate of the display panel 100 is glass, and correspondingly, the value range of the fatigue coefficient n of the glass is: n is more than or equal to 15 and less than or equal to 21. It can be understood that, according to the selection of the actual situation and the specific requirement setting, the value of the fatigue coefficient n may be properly adjusted, which is not limited herein.
The foregoing describes in detail a method for testing a lifetime of a display panel provided in an embodiment of the present application, and a specific example is applied to illustrate a principle and an implementation manner of the present application, and the description of the foregoing embodiment is only used to help understand the method and a core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A method for testing the service life of a display panel is characterized by comprising the following steps:
step B1, supporting a display panel by adopting two supporting elements, wherein the display panel has an actual curvature radius, the display panel comprises a first section, a second section and a third section which are sequentially connected, and the two supporting elements are arranged corresponding to the second section;
step B2, pressing the display panel downwards by using a force application element to bend the display panel to a preset curvature radius, wherein the preset curvature radius is smaller than the actual curvature radius, the force application element is positioned on one side of the display panel, which is far away from the support elements, and the force application element is positioned between the two support elements;
step B3, acquiring the preset service life of the display panel under the preset curvature radius;
and B4, acquiring the actual service life of the display panel according to the actual curvature radius, the preset curvature radius and the preset service life.
2. The method for testing the lifetime of a display panel according to claim 1, wherein in the step B1, the supporting member abuts against a supporting portion of the display panel;
in step B2, the force application element abuts against a force receiving portion of the display panel, and at least two force application elements are used to press down the force receiving portion of the display panel, and all the force receiving portions are symmetrically arranged about a central axis between the two support portions.
3. The method for testing lifetime of a display panel according to claim 2, wherein the two support portions are symmetrically disposed about a central axis of the second segment.
4. The life test method of a display panel according to claim 2, wherein a distance between two of the force receiving portions located at the outermost sides satisfies the following formula:
0.45×ΔL≤L1≤0.65×ΔL；
wherein L1 is the length between the two outermost force-receiving parts, and Δ L is the length between the two support parts.
5. The method for testing the lifetime of a display panel according to claim 2, wherein said step B2 comprises:
step B21, adopting the force application element to press down the display panel;
step B22, acquiring coordinates of a first detection point and coordinates of a second detection point of the display panel, wherein the first detection point and the second detection point are positioned between the two support parts;
and step B23, acquiring the preset curvature radius of the display panel according to the coordinates of the first detection point and the coordinates of the second detection point.
6. The method for testing lifetime of a display panel according to claim 5, wherein in said step B22, said first detection point is a midpoint between two of said supports, and said second detection point is located between said first detection point and one of said supports.
7. The method for testing the lifetime of a display panel according to claim 5, wherein in the step B22, the second detection point overlaps with the force receiving portion.
8. The life test method of a display panel according to claim 5, wherein in the step B23, the relationship between the coordinates of the first detection point, the coordinates of the second detection point, and the preset radius of curvature is:
wherein, X1 is the abscissa of the first detection point, Y1 is the ordinate of the first detection point, X2 is the abscissa of the second detection point, Y2 is the ordinate of the second detection point, and R1 is the preset curvature radius.
9. The method for testing lifetime of a display panel according to claim 1, wherein in said step B4, a relationship among said preset radius of curvature, said preset lifetime, said actual radius of curvature and said actual lifetime is:
wherein T1 is the preset life, R1 is the preset curvature radius, T2 is the actual life, R2 is the actual curvature radius of the display panel, and n is the fatigue coefficient.
10. The method for testing the lifetime of a display panel according to claim 9, wherein in the step B4, the range of the fatigue coefficient n is: n is more than or equal to 15 and less than or equal to 21.
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08166333A (en) * | 1994-10-11 | 1996-06-25 | Sumitomo Electric Ind Ltd | Estimation method of bend-resistant life of composite body and evaluation method of bend-resistant property of composite body |
| US20060052990A1 (en) * | 2002-11-28 | 2006-03-09 | Yasuo Iimori | Method and apparatus for predicting bending life spans of electric wires and or wire protecting members induced by vibrations, and recording medium storing program |
| CN101196451A (en) * | 2007-12-25 | 2008-06-11 | 沈阳仪表科学研究院 | Flexural oscillation testing machine for metal flexible pipe |
| JP2009093000A (en) * | 2007-10-10 | 2009-04-30 | Hitachi Displays Ltd | Liquid crystal display device |
| CN101960283A (en) * | 2008-03-04 | 2011-01-26 | 新日铁化学株式会社 | Method of predicting bend lifetime of laminated body, prediction device of bend lifetime of laminated body, prediction program of bend lifetime of laminated body, and recording medium |
| KR20160144694A (en) * | 2015-06-09 | 2016-12-19 | 한밭대학교 산학협력단 | Bending Test Apparatus for Flexible Display Device |
| CN107331299A (en) * | 2017-07-12 | 2017-11-07 | 武汉华星光电半导体显示技术有限公司 | A kind of tool for flexible sheet-like material static state bending |
| CN107402461A (en) * | 2017-09-08 | 2017-11-28 | 深圳市华星光电技术有限公司 | A kind of curved surface strength testing device of liquid crystal panel |
| CN107423462A (en) * | 2017-03-28 | 2017-12-01 | 中南大学 | Workpiece considers the Prediction method for fatigue life and system of three-dimensional rough surface morphology |
| CN107631861A (en) * | 2017-08-28 | 2018-01-26 | 武汉华星光电半导体显示技术有限公司 | Flexible display apparatus bends test equipment and system |
| CN207233894U (en) * | 2017-09-12 | 2018-04-13 | 广东国光电子有限公司 | A kind of flexible battery flex life test machine |
| CN108254949A (en) * | 2018-01-26 | 2018-07-06 | 惠州市华星光电技术有限公司 | The service life of liquid crystal display panel and the evaluation method of maximum curvature under a kind of curved surface state |
| CN109490096A (en) * | 2018-11-30 | 2019-03-19 | 南京交通职业技术学院 | A kind of crooked crack-resistant performance testing device and test method |
| CN112213876A (en) * | 2020-10-29 | 2021-01-12 | Tcl华星光电技术有限公司 | Adjustable curved surface liquid crystal display panel test device and operation method thereof |
| CN112461664A (en) * | 2020-11-30 | 2021-03-09 | 武汉天马微电子有限公司 | Display panel test fixture and test method thereof |
| CN112763353A (en) * | 2020-12-21 | 2021-05-07 | 深圳市信维通信股份有限公司 | Testing method for FPC bending fatigue life S-N curve |
-
2022
- 2022-02-24 CN CN202210171934.6A patent/CN114577451B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08166333A (en) * | 1994-10-11 | 1996-06-25 | Sumitomo Electric Ind Ltd | Estimation method of bend-resistant life of composite body and evaluation method of bend-resistant property of composite body |
| US20060052990A1 (en) * | 2002-11-28 | 2006-03-09 | Yasuo Iimori | Method and apparatus for predicting bending life spans of electric wires and or wire protecting members induced by vibrations, and recording medium storing program |
| JP2009093000A (en) * | 2007-10-10 | 2009-04-30 | Hitachi Displays Ltd | Liquid crystal display device |
| CN101196451A (en) * | 2007-12-25 | 2008-06-11 | 沈阳仪表科学研究院 | Flexural oscillation testing machine for metal flexible pipe |
| CN101960283A (en) * | 2008-03-04 | 2011-01-26 | 新日铁化学株式会社 | Method of predicting bend lifetime of laminated body, prediction device of bend lifetime of laminated body, prediction program of bend lifetime of laminated body, and recording medium |
| KR20160144694A (en) * | 2015-06-09 | 2016-12-19 | 한밭대학교 산학협력단 | Bending Test Apparatus for Flexible Display Device |
| CN107423462A (en) * | 2017-03-28 | 2017-12-01 | 中南大学 | Workpiece considers the Prediction method for fatigue life and system of three-dimensional rough surface morphology |
| CN107331299A (en) * | 2017-07-12 | 2017-11-07 | 武汉华星光电半导体显示技术有限公司 | A kind of tool for flexible sheet-like material static state bending |
| CN107631861A (en) * | 2017-08-28 | 2018-01-26 | 武汉华星光电半导体显示技术有限公司 | Flexible display apparatus bends test equipment and system |
| CN107402461A (en) * | 2017-09-08 | 2017-11-28 | 深圳市华星光电技术有限公司 | A kind of curved surface strength testing device of liquid crystal panel |
| CN207233894U (en) * | 2017-09-12 | 2018-04-13 | 广东国光电子有限公司 | A kind of flexible battery flex life test machine |
| CN108254949A (en) * | 2018-01-26 | 2018-07-06 | 惠州市华星光电技术有限公司 | The service life of liquid crystal display panel and the evaluation method of maximum curvature under a kind of curved surface state |
| CN109490096A (en) * | 2018-11-30 | 2019-03-19 | 南京交通职业技术学院 | A kind of crooked crack-resistant performance testing device and test method |
| CN112213876A (en) * | 2020-10-29 | 2021-01-12 | Tcl华星光电技术有限公司 | Adjustable curved surface liquid crystal display panel test device and operation method thereof |
| CN112461664A (en) * | 2020-11-30 | 2021-03-09 | 武汉天马微电子有限公司 | Display panel test fixture and test method thereof |
| CN112763353A (en) * | 2020-12-21 | 2021-05-07 | 深圳市信维通信股份有限公司 | Testing method for FPC bending fatigue life S-N curve |
Non-Patent Citations (1)
| Title |
|---|
| 曹虎文: "基于力学加载的柔性电子弯曲疲劳试验机的研制", 电子科技大学, pages 1 - 82 * |
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