CN112447112B - Flexible display panel and bending test fixture and method thereof - Google Patents
Flexible display panel and bending test fixture and method thereof Download PDFInfo
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- CN112447112B CN112447112B CN202011458088.3A CN202011458088A CN112447112B CN 112447112 B CN112447112 B CN 112447112B CN 202011458088 A CN202011458088 A CN 202011458088A CN 112447112 B CN112447112 B CN 112447112B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
The embodiment of the invention discloses a flexible display panel and a bending test fixture and method thereof. Wherein, flexible display panel includes: the flexible display module assembly and the magnetism leveling layer that is located the flexible display module assembly and deviates from one side of light-emitting direction. According to the technical scheme provided by the embodiment of the invention, the flexible display panel is fixedly attached to the bending test fixture in an electromagnetic adsorption attaching mode, so that the consistency of the motion trail of the flexible display module during bending test can be improved, and the problems that in the prior art, when the flexible display panel is fixed on a platform of a bending test device through rubber materials, the rubber materials are repeatedly pulled to generate deformation and slippage, each film layer of the flexible display panel slides, the movement of each film layer is inconsistent, the generated stress is increased, the strain of the flexible display module can be increased, and further a screen body fails are solved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display panel and a bending test fixture and method thereof.
Background
In recent years, flexible display technology has matured, and manufacturers have begun to apply flexible display panels to products. A display device using a flexible display panel can realize a large screen when unfolded and is convenient to carry when folded, and thus is suitable for application to displays in various fields, such as televisions, monitors, portable phones, ultra-thin portable personal computers, electronic books, and electronic paper.
Specifically, when a user wants to use the foldable display device, the user can unfold the foldable display device to fully unfold the flexible display screen so as to use a large display screen. When a user wants to move the foldable display device, the foldable display device can be folded to reduce the size of the foldable display device for carrying.
The folding display device needs to be subjected to bending test before leaving the factory.
Disclosure of Invention
The embodiment of the invention provides a flexible display panel and a bending test fixture and a bending test method thereof, wherein a non-bending area of the flexible display panel is fixedly attached to the bending test fixture in an electromagnetic adsorption attaching mode, so that the consistency of the motion trail of a flexible display module during bending test can be improved, and the problems that in the prior art, when the back surface of the non-bending area of the flexible display panel is fixed on a platform of a bending test device through a rubber material, the rubber material is repeatedly pulled to generate deformation and slippage along with repeated bending reciprocating motion, all film layers of the flexible display panel can slip, all film layers do not move uniformly, the generated stress is increased, the strain of the flexible display module is increased, and a screen body fails are solved.
In a first aspect, an embodiment of the present invention provides a flexible display panel, including: the flexible display module assembly and the magnetism leveling layer that is located the flexible display module assembly and deviates from one side of light-emitting direction. The utility model discloses a flexible display panel's magnetism leveling layer and the cooperation of the electromagnetism adsorption module in the fixed establishment in the test fixture of buckling, realize the electromagnetism adsorption laminating mode, with the fixed laminating of the non-district of buckling of flexible display panel on the test fixture of buckling, the uniformity of the movement track of flexible display module assembly during the test of buckling can be improved, thereby when fixing the back in the non-district of buckling of flexible display panel on the platform of the test device of buckling through the adhesive material class among the prior art has been solved, along with the reciprocating motion of buckling many times, lead to the adhesive material can be dragged repeatedly and produce deformation, each rete of flexible display panel can produce and slide, each rete motion is inconsistent, the stress increase of production, can increase the strain of flexible display module assembly self, and then make the flexible display panel inefficacy problem, furthermore, the convenience is taken off the flexible display panel after the test finishes, the problem of being dragged and taken off because of the adhesive material bonding among the prior art has been solved, lead to flexible display module assembly impaired easily.
Furthermore, the material of the magnetic leveling layer comprises silicon steel so as to improve the adsorption force of a magnetic adsorption module in a fixing mechanism in the bending test fixture on the magnetic leveling layer.
Furthermore, the surface of the magnetic leveling layer is provided with an antirust protective layer, and the magnetic leveling layer is isolated from the atmosphere through the antirust protective layer, so that an anticorrosion effect is achieved.
Further, the rust-preventive protective layer includes at least one of: a rust preventive grease layer and a gas phase rust preventive layer.
Further, flexible display panel is including at least one bending zone and two at least non-bending zones that set up in turn, and flexible display module assembly and magnetism leveling layer cover at least one bending zone and two at least non-bending zones, conveniently fold and accomodate.
In a second aspect, an embodiment of the present invention further provides a bending test fixture for a flexible display panel, including: a fixing mechanism;
the fixing mechanism is provided with an electromagnetic adsorption module, and the electromagnetic adsorption module is used for generating magnetic force for adsorbing a non-bending area of the flexible display panel so as to enable the non-bending area of the flexible display panel to be fixedly attached to the bending test fixture. Magnetic structures such as a magnetic leveling layer of the flexible display panel are matched with an electromagnetic adsorption module in a fixing mechanism in a bending test fixture, an electromagnetic adsorption laminating mode is realized, a non-bending area of the flexible display panel is fixedly laminated on the bending test fixture, the consistency of a motion track of the flexible display module during bending test can be improved, the problems that in the prior art, the back of the non-bending area of the flexible display panel is fixed on a platform of a bending test device through a glue material class, the back and forth motion along with repeated bending results in deformation caused by repeated pulling of the glue material, each film layer of the flexible display panel can slide, the motion of each film layer is inconsistent, the stress is increased, the strain of the flexible display module can be increased, the screen body is made to lose efficacy are solved, in addition, the flexible display panel is convenient to take down after the test is finished, the problem that in the prior art, the flexible display module is easy to damage caused by pulling of the glue material is solved.
Further, a bending test fixture for the flexible display panel further comprises: a turnover mechanism;
the electromagnetic adsorption module is used for generating magnetic force for adsorbing a non-bending area of the flexible display panel so as to fix the non-bending area of the flexible display panel on the turnover mechanism through the fixing mechanism;
the turnover mechanism is used for enabling a non-bending area of the flexible display panel to be turned over to a bending area to be bent.
Further, the fixing mechanism further comprises: and the switch is used for controlling whether the electromagnetic adsorption module is electrified or not.
Further, the electromagnetic absorption module comprises a magnetic core coil.
In a third aspect, an embodiment of the present invention further provides a bending test method for a flexible display panel, based on the bending test fixture for a flexible display panel provided in any embodiment of the present invention, including:
placing a non-bending area of the flexible display panel to be tested on a bending test fixture;
electrifying the electromagnetic adsorption module;
bending the flexible display panel;
after the bending test of the flexible display panel is finished, the electromagnetic adsorption module is powered off;
and taking down the flexible display panel from the bending test fixture.
The flexible display panel in the technical scheme of the embodiment of the invention comprises a flexible display module and a magnetic leveling layer positioned on one side of the flexible display module, which deviates from the light-emitting direction, so that when a bending test is required, the magnetic leveling layer of the flexible display panel is matched with an electromagnetic adsorption module in a fixing mechanism in a bending test fixture to realize the action of electromagnetic adsorption and lamination, and a non-bending area of the flexible display panel is fixedly laminated on the bending test fixture, thereby improving the consistency of the motion trail of the flexible display module during the bending test, and solving the problems that the flexible display panel can be repeatedly pulled to generate deformation and slippage along with the reciprocating motion of repeated bending, each film layer of the flexible display panel can generate slippage, each film layer does not move consistently, the generated stress is increased, the strain of the flexible display module can be increased, and a screen body is failed when the back of the non-bending area of the flexible display panel is fixed on a platform of a bending test device through a rubber material in the prior art.
Drawings
Fig. 1 is a schematic structural diagram of a flexible display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a bending test fixture for a flexible display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a flexible display panel placed in a bending test fixture according to an embodiment of the present invention, the flexible display panel being laid flat;
fig. 4 is a schematic structural diagram of a flexible display panel in an inward folding process according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a flexible display panel folded inward to an end position according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a flexible display panel folded to an end position according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention;
fig. 10 is a schematic structural view illustrating a flexible display panel according to an embodiment of the present invention being placed on a bending test fixture and being flattened;
fig. 11 is a schematic structural view of another flexible display panel placed in a bending test fixture according to an embodiment of the present invention, the flexible display panel being laid flat;
fig. 12 is a schematic structural diagram of another flexible display panel provided in an embodiment of the present invention during a folding process;
fig. 13 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention when being folded inward to an end position;
fig. 14 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention folded outward to an end position;
fig. 15 is a schematic diagram of a circuit connection relationship of an electromagnetic adsorption module according to an embodiment of the present invention;
fig. 16 is a flowchart of a bending test method for a flexible display panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.
The embodiment of the invention provides a flexible display panel. Fig. 1 is a schematic structural diagram of a flexible display panel according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a bending test fixture for a flexible display panel according to an embodiment of the present invention. Fig. 3 is a schematic structural view of a flexible display panel placed on a bending test fixture according to an embodiment of the present invention, wherein the flexible display panel is laid flat. Fig. 4 is a schematic structural diagram of a flexible display panel provided in an embodiment of the present invention during a folding process. Fig. 5 is a schematic structural diagram of a flexible display panel folded inward to an end position according to an embodiment of the present invention. Fig. 6 is a schematic structural diagram of a flexible display panel folded to an end position according to an embodiment of the present invention. The flexible display panel includes: the flexible display module 10 and the magnetic leveling layer 20 located on one side of the flexible display module 10 departing from the light-emitting direction.
Wherein the flexible display panel may include an organic light emitting flexible display panel. The flexible display panel may be a foldable display panel. The flexible display module 10 may include a flexible substrate, a driving array layer, an organic light emitting layer, a thin film encapsulation layer, and the like, which are sequentially stacked. The magnetic planarization layer 20 may include a magnetic material layer. The magnetic leveling layer 20 may be made of electromagnetic steel to improve the adsorption force of the magnetic adsorption module in the bending test fixture to the magnetic leveling layer 20.
In order to ensure the bending performance of the flexible display panel, the flexible display module adopts materials such as polyimide as a substrate instead of the traditional glass as a cover plate or a base plate. Polyimide and other materials have good bending resistance, but the Young modulus, the straightness and the fatigue strength of the polyimide are not as good as those of glass, and the polyimide and other materials serving as structural materials cannot provide support like glass. Magnetic leveling layer 20 can make flexible display panel have better planarization, provides the rigidity for the flexible display module in non-bending zone and supports to neither influence the degree of buckling in bending zone, strengthened the straightness and the surface smoothness in non-bending zone again, avoid the inner structure of flexible display module can't take place for the condition that flexible display panel self provided the support. The magnetic leveling layer 20 is located on one side of the flexible display module 10 departing from the light emitting direction, so that the situation that the display effect is affected by shading of the magnetic leveling layer 20 can be avoided. Alternatively, the flexible display panel may be a top emission type flexible display panel, and the magnetic planarization layer 20 is located on a side of the flexible substrate away from the driving array layer. Alternatively, the flexible display panel may be a bottom emission type flexible display panel, and the magnetic planarization layer 20 is located on a side of the thin film encapsulation layer away from the organic light emitting layer. The magnetic leveling layer 20 may be attached to a side of the flexible display module away from the light emitting direction through an adhesive. The adhesive may include an optical glue or the like.
Referring to fig. 1 to 6, when the flexible display panel is subjected to a bending test, the flexible display panel may be placed on a bending test fixture, and the magnetic adsorption module 61 in the fixing mechanism in the bending test fixture is powered on to generate a magnetic force for adsorbing the magnetic leveling layer 20 in the non-bending region, so that the flexible display panel is fixedly attached to the bending test fixture, and the flexible display panel is subjected to an inward bending test and/or an outward bending test. After the test is finished, the flexible display panel returns to the flattening position, and the magnetic adsorption module in the fixing mechanism in the bending test fixture is powered off, so that the magnetic force disappears, and the flexible display panel on the test fixture is convenient to take down. Through the electromagnetic adsorption laminating mode, with the fixed laminating of flexible display panel's non-bending zone on bending test fixture, the motion track's of flexible display module when can improve bending test uniformity, thereby solved among the prior art with the back of flexible display panel's non-bending zone through the adhesive material class when fixing on bending test device's platform, along with the reciprocating motion of buckling many times, lead to gluing the material and can be dragged repeatedly and produce deformation and slippage, each rete that leads to flexible display panel can produce and slide, each rete motion is inconsistent, the stress increase of production, can increase the meeting an emergency of flexible display module self, and then make the problem that the screen body became invalid, in addition, conveniently take off flexible display panel after the test, solved among the prior art because of gluing the material bonding and pulled off, lead to the impaired problem of flexible display module easily.
The flexible display panel in the technical scheme of this embodiment includes flexible display module and the magnetism leveling layer that is located the one side that flexible display module deviates from the light-emitting direction, in order when the test of buckling is carried out to needs, the magnetism leveling layer of flexible display panel cooperates with the electromagnetic adsorption module among the fixed establishment in the test fixture of buckling, realize the effect of electromagnetic adsorption laminating, with the fixed laminating of the non-bending zone of flexible display panel on the test fixture of buckling, the uniformity of the movement track of flexible display module when can improve the test of buckling, thereby solved among the prior art when fixing the back in the non-bending zone of flexible display panel on the platform of the test device of buckling through the adhesive material class, along with the reciprocating motion of buckling many times, lead to the material of gluing to be dragged repeatedly and produce deformation and slippage, each rete of flexible display panel can produce and slide, each rete motion inconsistency, the stress increase of production, can increase the meeting an emergency of flexible display module self, and then make the problem that the screen body became invalid, in addition, conveniently take off the flexible display panel after the test, solved because of gluing material bonding and pulled and taken off, the impaired problem that leads to the flexible display module easily.
Optionally, the material of the magnetic leveling layer 20 includes electromagnetic steel such as silicon steel, so as to improve the adsorption force of the magnetic adsorption module 61 in the fixing mechanism in the bending test fixture on the magnetic leveling layer 20. The electromagnetic steel is silicon steel, which is a cold rolled steel sheet with special function, and is a negative sheet with specific electromagnetic property, which is adjusted by using a base material with extremely low carbon and nitrogen components and matching with special hot and cold rolling annealing conditions.
Optionally, on the basis of the foregoing embodiment, fig. 7 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention, and an anti-rust protective layer 30 is disposed on a surface of the magnetic planarization layer 20. In order to avoid the occurrence of metal corrosion, specifically electrochemical corrosion, of the magnetic material in the magnetic planarization layer 20, since the electrochemical corrosion is directly related to the surrounding environment, the magnetic planarization layer 20 is isolated from the atmosphere by the anti-rust protection layer 30 to protect the magnetic material from corrosion in order to destroy the electrochemical corrosion conditions.
Wherein, optionally, the rust-proof protection layer 30 includes at least one of the following: an antirust grease layer and a gas phase antirust layer. The antirust grease can be prepared by adding an oil-soluble buffering agent into a petroleum basic component, and also can be added with a plurality of auxiliary additives such as a detergent dispersant, an antioxidant preservative, an extreme pressure antiwear agent, an oiliness agent, an antioxidant, a metal passivator, a viscosity additive, a pour point depressant, a defoaming agent and the like. The antirust grease has good adhesive force to metal, complete film forming, compactness, uniformity and firmness, and the antirust grease is easy to spray, clear and nontoxic. The gas phase rust preventive layer may be a SYQ-10 gas phase rust preventive layer. The gas phase rust preventive layer (also called gas phase buffering agent) can comprise at least one of the following materials: amine salts with inorganic acids, amine salts with organic acids, esters, nitro compounds and amine salts thereof, and the like. The gas phase rust-proof method is simple, the effect is good, and the period of validity is long.
Optionally, on the basis of the foregoing embodiment, fig. 8 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention, where the flexible display panel includes at least one bending region and at least two non-bending regions that are alternately arranged, and the flexible display module 10 and the magnetic planarization layer 20 cover the at least one bending region and the at least two non-bending regions, so as to facilitate folding and storage. Optionally, when the flexible display panel is flattened, the at least one bending region and the at least two non-bending regions are arranged in parallel to form a row.
Fig. 1 exemplarily shows that the flexible display panel includes a bending region, i.e., a first bending region 11, and two non-bending regions, i.e., a first non-bending region 12 and a second non-bending region 13, where the first non-bending region 12 and the second non-bending region 13 are located at two opposite sides of the first bending region 11. Fig. 8 exemplarily shows that the flexible display panel includes two bending regions, i.e., a first bending region 11 and a second bending region 14, and three non-bending regions, i.e., a first non-bending region 12, a second non-bending region 13, and a third non-bending region 15, where the second non-bending region 13 and the third non-bending region 15 are located at two opposite sides of the second bending region 14.
The embodiment of the invention provides a bending test fixture for a flexible display panel. On the basis of the above embodiments, with continuing reference to fig. 1 to 6, the bending test fixture for a flexible display panel includes: a securing mechanism 60.
Wherein, fixing mechanism 60 is provided with electromagnetism absorption module 61, and electromagnetism absorption module 61 is used for producing the magnetic force of adsorbing the non-bending region of flexible display panel to make the non-bending region of flexible display panel fixed the laminating on bending test fixture.
It should be noted that, except for the fixing mechanism, the bending test fixture in the embodiment of the present invention may be the same as or similar to the bending test fixture in the prior art. Optionally, the bending test fixture may further include a test platform 80, the test platform 80 may be provided with a fixing mechanism 60, and the corresponding non-bending region of the flexible display panel may be fixed and attached to the test platform 80 through the fixing mechanism 60. The first surface of the testing platform 80, which is attached to the flexible display panel, may be provided with a groove, and the electromagnetic absorption module 61 in the fixing mechanism 60 may be located in the groove. The side of the electromagnetic adsorption module 61 away from the bottom of the groove is flush with the part of the first surface of the test platform 80 where the groove is not arranged.
Optionally, the bending test fixture further comprises: the turnover mechanism 70, and the fixing mechanism 60 can be arranged on the turnover mechanism 70. The electromagnetic absorption module 61 on the turnover mechanism 70 is configured to generate a magnetic force for absorbing the corresponding non-bending region of the flexible display panel, so that the corresponding non-bending region of the flexible display panel is fixed on the turnover mechanism 70 through the fixing mechanism 60. The flipping mechanism 70 is used to flip the corresponding non-bending region of the flexible display panel to the bending region to be bent. The second surface of the turnover mechanism 70 attached to the flexible display panel may be provided with a groove, and the electromagnetic absorption module 61 may be located in the groove. The side of the electromagnetic adsorption module 61 away from the bottom of the groove is flush with the part of the second surface of the turnover mechanism 70 where no groove is arranged.
Referring to fig. 1 to 6, when a flexible display panel is subjected to a bending test, a first non-bending region 12 of the flexible display panel is placed on a test platform 80 of a bending test fixture, a magnetic adsorption module 61 on the test platform 80 is powered to generate a magnetic force for adsorbing a magnetic leveling layer 20 of the first non-bending region 12, the first non-bending region 12 of the flexible display panel is fixedly attached to the test platform 80, a second non-bending region 13 of the flexible display panel is placed on a turnover mechanism 70 of the bending test fixture, and the magnetic adsorption module 61 on the turnover mechanism 70 is powered to generate a magnetic force for adsorbing the magnetic leveling layer 20 of the second non-bending region 13, so that the second non-bending region 13 of the flexible display panel is fixedly attached to the turnover mechanism 70, and the turnover mechanism 70 is turned over, so as to perform tests such as inward bending and/or outward bending on the flexible display panel. After the test is finished, the flexible display panel can return to the flattening position, the magnetic adsorption module 61 is powered off, the magnetic force disappears, and the flexible display panel on the test fixture is conveniently taken down. Through the electromagnetic adsorption laminating mode, with the fixed laminating in flexible display panel's the non-bending region on bending test fixture, the motion track's of flexible display module uniformity when can improve bending test, thereby solved among the prior art with the back in flexible display panel's the non-bending region through the adhesive material class when fixing on bending test device's platform, along with the reciprocating motion of buckling many times, lead to gluing the material and can be dragged the production deformation repeatedly, each rete of flexible display panel can produce and slide, each rete motion is inconsistent, the stress increase of production, can increase flexible display module self meets an emergency, and then make the problem that the screen body became invalid, in addition, the flexible display panel is conveniently taken off after the test, it is dragged and takes off because of gluing the material bonding to have solved among the prior art, lead to the impaired problem of flexible display module easily.
Optionally, as shown in fig. 5 or fig. 6, a polarity (N-pole or S-pole) of a side, facing the flexible display panel, of the electromagnetic adsorption module 61 on the testing platform 80 is the same as a polarity (N-pole or S-pole) of a side, facing the flexible display panel, of the electromagnetic adsorption module 61 on the turning mechanism 70, so that the electromagnetic adsorption module 61 on the testing platform 80 generates a repulsive force to the second non-bending region 13 of the flexible display panel, and the electromagnetic adsorption module 61 on the turning mechanism 70 generates a repulsive force to the first non-bending region 13 of the flexible display panel, so as to further enable the first non-bending region 12 of the flexible display panel to be firmly attached to the testing platform 80, and enable the second non-bending region 13 of the flexible display panel to be firmly attached to the turning mechanism 70.
Fig. 9 is a schematic structural diagram of another flexible display panel according to an embodiment of the present invention. Fig. 10 is a schematic structural view illustrating a flexible display panel placed on a bending test fixture according to another embodiment of the present invention, wherein the flexible display panel is laid flat. Fig. 9 and 10 exemplarily show that when the non-bending region of the flexible display panel is provided with the magnetic structure, when the flexible display panel is subjected to bending test, the first non-bending region 12 of the flexible display panel is placed on the test platform 80 of the bending test fixture, the magnetic adsorption module 61 on the test platform 80 is energized to generate a magnetic force for adsorbing the magnetic structure 40-1, so that the first non-bending region 12 of the flexible display panel is fixedly attached to the test platform 80, the second non-bending region 13 of the flexible display panel is placed on the turnover mechanism 70 of the bending test fixture, and the magnetic adsorption module 61 on the turnover mechanism 70 is energized to generate a magnetic force for adsorbing the magnetic structure 40-2, so that the second non-bending region 13 of the flexible display panel is fixedly attached to the turnover mechanism 70, and the turnover mechanism 70 is turned over, so as to perform tests such as inward bending and/outward bending on the flexible display panel. After the test is finished, the flexible display panel returns to the flattening position, the magnetic adsorption module 61 is powered off, so that the magnetic force disappears, and the flexible display panel on the test fixture is conveniently taken down. The magnetic structure may include a layer of magnetic material. The magnetic structure can be arranged in the flexible display module.
Fig. 11 is a schematic structural view of another flexible display panel placed in a bending test fixture according to an embodiment of the present invention, and the flexible display panel is laid out flat. Fig. 12 is a schematic structural diagram of another flexible display panel provided in an embodiment of the present invention during a folding process. Fig. 13 is a schematic structural diagram of another flexible display panel folded inward to an end position according to an embodiment of the present invention. Fig. 14 is a schematic structural diagram of another flexible display panel folded outward to an end position according to an embodiment of the present invention. Fig. 11 to 14 exemplarily show that the non-bending region of the flexible display panel corresponds to the turning mechanism 70 one-to-one, when the flexible display panel is subjected to bending test, any bending region is placed on the corresponding turning mechanism 70, and the magnetic adsorption module on the turning mechanism 70 is powered on to generate magnetic force for adsorbing the magnetic leveling layer 20 of the corresponding non-bending region, so that the non-bending region is fixedly attached to the corresponding turning mechanism 70, and then the turning mechanism 70 is turned over, so as to perform tests such as inward bending and/or outward bending on the flexible display panel. After the test is finished, the flexible display panel can return to the flattening position, the magnetic adsorption module is powered off, the magnetic force disappears, and the flexible display panel on the test fixture is convenient to take down. The two turnover mechanisms in the technical solutions corresponding to fig. 11 to 14 can be respectively turned over by 90 degrees upwards or downwards from the initial positions of the two turnover mechanisms when being unfolded, and then can complete the in-turn folding test or the one-time folding test, and the two turnover mechanisms are turned over simultaneously, and the turning angular velocities are equal. The turnover mechanism in the technical solutions corresponding to fig. 3 to fig. 6 can be turned up or down 180 degrees from the initial position of the turnover mechanism during flattening, and then a folding-in test or a folding-out test can be completed.
Optionally, as shown in fig. 13 or fig. 14, the polarities of the sides of the electromagnetic absorption modules 61 on the respective turnover mechanisms 70 facing the flexible display panel are the same, so that the electromagnetic absorption modules 61 on the turnover mechanisms 70 generate repulsive force to the magnetic flat layers of the non-bending regions on the other turnover mechanisms 70, so as to further make the non-bending regions of the flexible display panel firmly adhere to the corresponding turnover mechanisms.
Optionally, on the basis of the foregoing embodiment, fig. 15 is a schematic circuit connection diagram of an electromagnetic adsorption module according to an embodiment of the present invention, and the fixing mechanism 60 further includes: a switch 62.
The electromagnetic adsorption module 61 is electrically connected to the power supply 63 through the switch 62, and the switch 62 is used for controlling whether the electromagnetic adsorption module 61 is powered on or not.
Wherein, optionally, the electromagnetic absorption module 61 may include a magnetic core coil. The switch 62 is controlled to be turned on or off to control whether the electromagnetic adsorption module 61 is powered or not. Alternatively, the switch 62 may be electrically connected to the core coil to control the core coil to be energized or not by controlling the on or off of the switch 62. The electromagnetic adsorption module 61 may further include a housing, and the magnetic core coil is disposed in the housing. The housing may be made of a non-magnetic material, for example the housing may be made of plastic or the like. The switch 62 may be a push button switch or the like. Alternatively, the electromagnetic absorption module 61 may be connected to the power supply through a connector. The connector may include a plug and a receptacle, etc.
The embodiment of the invention provides a bending test method for a flexible display panel. Fig. 16 is a flowchart of a bending test method for a flexible display panel according to an embodiment of the present invention. The bending test method for the flexible display panel is realized on the basis of the bending test fixture for the flexible display panel provided by any embodiment of the invention. The bending test method of the flexible display panel comprises the following steps:
step 110, placing the non-bending area of the flexible display panel to be tested on a bending test fixture.
As shown in fig. 3, 10 or 11, the non-bending region of the flexible display panel to be tested is placed on the testing platform 80 or the turnover mechanism 70 of the bending testing fixture.
And step 120, electrifying the electromagnetic adsorption module.
For example, as shown in fig. 15, fig. 3, fig. 10, and fig. 11, the switch 62 may be controlled to be closed, so that the magnetic core coil in the electromagnetic adsorption module 61 is powered, and the non-bending region of the flexible display panel is fixedly attached to the test platform 80 or the turnover mechanism 70.
And 130, performing bending test on the flexible display panel.
As shown in fig. 4 to 6 or fig. 12 to 14, the turnover mechanism 70 is turned over to perform the inward folding and/or outward folding test on the flexible display panel.
And 140, after the bending test of the flexible display panel is finished, powering off the electromagnetic adsorption module.
For example, as shown in fig. 15, the switch 62 may be controlled to be turned off to turn off the magnetic core coil in the electromagnetic absorption module 61.
And 150, taking down the flexible display panel from the bending test fixture.
The bending test method for the flexible display panel provided by the embodiment of the invention is realized based on the bending test fixture for the flexible display panel in the embodiment, so that the bending test method for the flexible display panel provided by the embodiment of the invention also has the beneficial effects described in the embodiment, and the details are not repeated herein.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (5)
1. The utility model provides a test fixture buckles for flexible display panel which characterized in that includes: a fixing mechanism;
the fixing mechanism is provided with an electromagnetic adsorption module which is used for generating magnetic force for adsorbing the non-bending area of the flexible display panel so as to enable the non-bending area of the flexible display panel to be fixedly attached to the bending test fixture;
the bending test fixture comprises a test platform and a turnover mechanism, and the test platform and the turnover mechanism are both provided with the fixing mechanisms; the polarity of one side, facing the flexible display panel, of the electromagnetic adsorption module on the test platform is the same as the polarity of one side, facing the flexible display panel, of the electromagnetic adsorption module on the turnover mechanism;
a groove is formed in the first surface, attached to the flexible display panel, of the test platform, and an electromagnetic adsorption module in the fixing mechanism is located in the groove; the electromagnetic adsorption module is far away from one side of the bottom of the groove and is flush with the part, which is not provided with the groove, of the first surface of the test platform;
a groove is formed in the second surface, attached to the flexible display panel, of the turnover mechanism, and the electromagnetic adsorption module is located in the groove; the electromagnetic adsorption module is far away from one side of the bottom of the groove and is flush with the part, which is not provided with the groove, of the second surface of the turnover mechanism.
2. The bending test fixture for a flexible display panel according to claim 1, wherein the electromagnetic absorption module on the turnover mechanism is configured to generate a magnetic force for absorbing a non-bending area of the flexible display panel, so that the non-bending area of the flexible display panel is fixed on the turnover mechanism through the fixing mechanism;
the turnover mechanism is used for enabling a non-bending area of the flexible display panel to be turned over to a bending area to be bent.
3. The bending test fixture for flexible display panel according to claim 1, wherein the fixing mechanism further comprises: and the switch is used for controlling whether the electromagnetic adsorption module is electrified or not.
4. The bending test fixture for flexible display panel according to claim 1, wherein the electromagnetic absorption module comprises a magnetic core coil.
5. A bending test method for a flexible display panel based on the bending test fixture for the flexible display panel according to any one of claims 1 to 4, comprising:
placing a non-bending area of the flexible display panel to be tested on the bending test fixture;
energizing the electromagnetic adsorption module;
performing bending test on the flexible display panel;
after the bending test of the flexible display panel is finished, the electromagnetic adsorption module is powered off;
and taking down the flexible display panel from the bending test fixture.
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| CN113012582B (en) * | 2021-03-17 | 2022-04-22 | 合肥维信诺科技有限公司 | Bending device and folding display device |
| CN113198663B (en) * | 2021-04-22 | 2022-10-18 | 京东方科技集团股份有限公司 | Coating film repairing equipment and method for bent screen |
| CN113188451B (en) * | 2021-04-28 | 2023-04-18 | 京东方科技集团股份有限公司 | Jig for testing bending error amount of flexible display module and testing method thereof |
| CN113299199A (en) * | 2021-05-19 | 2021-08-24 | 河源力友通讯科技有限公司 | Manufacturing method of flexible AMOLED display module of mobile phone |
| CN114067688B (en) * | 2021-11-18 | 2024-04-23 | 合肥维信诺科技有限公司 | Screen body turning jig and screen body turning method |
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