CN107515998A - A kind of flexible display screen Mechanics Simulation method - Google Patents
A kind of flexible display screen Mechanics Simulation method Download PDFInfo
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- CN107515998A CN107515998A CN201710935615.7A CN201710935615A CN107515998A CN 107515998 A CN107515998 A CN 107515998A CN 201710935615 A CN201710935615 A CN 201710935615A CN 107515998 A CN107515998 A CN 107515998A
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Abstract
The present invention discloses a kind of flexible display screen Mechanics Simulation method.This method includes：Obtain the rudimentary model established according to flexible display screen scheme；The rudimentary model is made up of multiple identical block models；The block model is split out from the rudimentary model；The block model is modeled with SolidWorks softwares, obtains the entity file of the block model；The entity file is imported into ANSYS softwares；Mesh generation is carried out to the flexible display screen entity in the entity file using the mesh generation function of the ANSYS softwares, obtains the entity with grid；Load is applied to the entity with grid, the entity with grid is bent to default curvature；Calculate the stress situation of physically each grid cell with grid.Flexible display screen Mechanics Simulation method provided by the invention, effectively increase the efficiency of flexible display screen performance evaluation.
Description
Technical field
The present invention relates to simulation technical field, more particularly to a kind of flexible display screen Mechanics Simulation method.
Background technology
With the increasingly renewal of electronic product, the screen size of wearable device and portable equipment gradually increases, overall big
Small but constantly to reduce, the frame size of screen is increasingly paid attention to by research staff and consumer.In order to reach Novel electric
Portable equipment screen developing direction is turned to flexible display screen and supporting by the requirement of sub- product Rimless and high screen accounting, people
Above flexible device.Display screen can be made into Curved screen, hyperbolic face easily by flexible display technologies, and can effectively subtracted
Volume, quality shared by few display screen, and increase screen accounting；In addition, flexible display screen has preferable mechanical characteristic, it is not easy to break
It is disconnected, therefore than traditional display screen more resistant to impacting, be less susceptible to fragmentation.But what current flexible display screen and associated flexible device were commonly used
Material and arrangement are also easy to produce the failure modes such as crackle, delamination under the conditions of the bending of deep camber, can not meet that mechanics is stable
Property, the requirement being not easily broken.Therefore, need to evaluate flexible display screen scheme before display screen is developed, therefrom to each
Flexible display screen scheme carries out assessment and sums up preliminary rule, and then carries out the model optimization of flexible display screen scheme.It is right at present
The method that flexible display screen scheme is evaluated is analogue experiment method, but analogue experiment method needs to manufacture experimental situation,
More flexible display screen need to be produced when experiment number is more could carry out simulated experiment, less efficient.
The content of the invention
It is an object of the invention to provide a kind of flexible display screen Mechanics Simulation method, flexible display screen performance is effectively increased
The efficiency of evaluation.
To achieve the above object, the invention provides following scheme：
A kind of flexible display screen Mechanics Simulation method, including：
Obtain the rudimentary model established according to flexible display screen scheme；The rudimentary model is by multiple identical block models
Composition；
The block model is split out from the rudimentary model；
The block model is modeled with SolidWorks softwares, obtains the entity file of the block model；
The entity file is imported into ANSYS softwares；
The flexible display screen pseudo-entity in the entity file is entered using the mesh generation function of the ANSYS softwares
Row mesh generation, obtain the entity with grid；
Load is applied to the entity with grid, the entity with grid is bent to default curvature；
Calculate the stress situation of physically each grid cell with grid.
Optionally, it is described that the block model is modeled with SolidWorks softwares, obtain the block model
Entity file, specifically include：
The block model equal proportion is amplified, makes the minimum geometries of the block model more than described
The full accuracy of SolidWorks softwares, so as to be amplified model；
The entity of the scale-up model is established in the SolidWorks softwares, is amplified entity；
Corners processing is carried out to the rib extended in the amplifying entity from bottom surface to top surface, it is real to obtain edge true to natureization
Body；
By the edge true to natureization entity scaled down time and the block model identical size, original reality is obtained
Body；
The primary entities are saved as into entity file.
Optionally, it is described to the amplifying entity in rib from bottom surface to top surface that extend from carry out corners processing, obtain
After edge true to natureization entity, the edge true to natureization entity scaled down is returned and the block model identical described
Size, before obtaining primary entities, in addition to：
Judge whether the shape of the edge true to natureization entity is regular；
If the edge true to natureization entity is in irregular shape, the edge true to natureization entity is divided into according to shape
The small pseudo-entity of multiple regular shapes.
Optionally, it is described that the entity file is imported into ANSYS softwares, specifically include：
The ANSYS softwares are opened, the entity file is imported into the ANSYS softwares；
In the ANSYS softwares, the small entity of the multiple regular shape is integrated into one using functions of modules is designed
Part of the individual complete packet containing all small entities.
Optionally, the mesh generation function using the ANSYS softwares is to the Flexible Displays in the entity file
Shield entity and carry out mesh generation, obtain the entity with grid, specifically include：
Using hexahedral mesh, scan, one or more modes in body size Control and face size Control are to each soft
Property display screen entity carry out mesh generation；
When the surface of the flexible display screen entity carries curved surface, increase surface mesh number is to table in the pseudo-entity
Face carries out mesh generation for the part of curved surface；
Whether the parameters for searching the grid meet given threshold, if be unsatisfactory for, the grid is adjusted,
Until parameters are satisfied by given threshold, so as to obtain the entity with grid.
Optionally, it is described that load is applied to the entity with grid, bend to the entity with grid default
Curvature, specifically include：
According to the position of the default curvature estimation pivot；The pivot is the entity with grid
The central point that side is surrounded when being rotated along assigned direction；
Load is applied to relative two side of the entity with grid, makes two relative sides around described
Pivot rotates, and the entity with grid is bent to default curvature.
According to specific embodiment provided by the invention, the invention discloses following technique effect：The present invention provides a kind of soft
Property display screen Mechanics Simulation method, the emulation to flexible display screen mechanics is realized, so as to instead of in the prior art using real
The means tested are evaluated the mechanical property of flexible display screen, so as to eliminate the excessive flexible display screen experiment sample of production and
The process of experimental situation is manufactured, improves the efficiency of the evaluation to flexible display screen scheme.Meanwhile also eliminate largely make it is soft
Property display screen experiment sample and manufacture experimental situation needed for cost, reduce the cost input of early stage.Simultaneously by preliminary
Block model is split out in model so as to handle block model, modeling process is greatly reduced, reduces entity file
Size, improve the efficiency of emulation, while the pressure for reducing computer also reduces the hardware requirement to computer；Pass through
Mesh generation is carried out to the flexible display screen entity, and gathers the stress situation of each grid cell, ensure that stress gathers
Regularity, so as to be more convenient for find flexible display screen stress weak spot.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the method flow diagram of flexible display screen Mechanics Simulation embodiment of the method for the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
Fig. 1 is the method flow diagram of flexible display screen Mechanics Simulation embodiment of the method for the present invention.
Referring to Fig. 1, the flexible display screen Mechanics Simulation method of the invention is a kind of deep camber bending emulation mode, for
Flexible display screen length and width it is bigger, and the mirror array body that the flexible display screen is made up of multiple identical junior units.It is imitative
True process is modeled with SolidWorks softwares, with the static mechanical analytic function of ANSYS softwares to flexible display screen phase
Close device and carry out Mechanics Simulation.
The flexible display screen Mechanics Simulation method, including：
Step 101：Obtain the rudimentary model established according to flexible display screen scheme；The rudimentary model is by multiple identicals
Block model forms；The rudimentary model is the mirror array body that multiple identical block models are formed.
Step 102：The block model is split out from the rudimentary model；The rudimentary model is thicker in mesh quality
Millions of individual grids are included in the case of big, and the temporary file capacity solved exceedes fdisk size, to imitating
Genuine computing power requires higher, it is therefore desirable to the size of the rudimentary model is greatly decreased.Due to the rudimentary model by
Multiple identical block model compositions, therefore in order to reduce emulated pressure, one of block model can be analyzed.
Step 103：The block model is modeled with SolidWorks softwares, obtains the reality of the block model
Body file；Specially：
Because the full accuracy of SolidWorks softwares can not meet the structure of the model of the block model thinnest part,
Therefore need to be amplified processing to the block model, will the block model equal proportion amplify, make the block model
The thinnest part thickness be more than the SolidWorks softwares full accuracy, so as to be amplified model.
The entity of the scale-up model is established in the SolidWorks softwares, is amplified entity；
Corners processing is carried out to the rib extended in the amplifying entity from bottom surface to top surface, it is real to obtain edge true to natureization
Body；Handled by corners, the marginal texture of the marginal texture of the amplifying entity closer to true display screen so that this is put
Big entity is closer to truth；
Judge whether the shape of the edge true to natureization entity is regular；If the shape of the edge true to natureization entity is not advised
Then, then entity division is carried out according to shape to the edge true to natureization entity using plane, draws the edge true to natureization entity
It is divided into the small entity of multiple regular shapes；The entity division process can effectively reduce the negative of mesh generation process in subsequent step
Load.
By the edge true to natureization entity scaled down time and the block model identical size, original reality is obtained
Body；Multiplication factor is identical with minification；
The primary entities are saved as into entity file, the suffix of the entity file is " .x_t ".
Step 104：The entity file is imported into ANSYS softwares；Specially：
The ANSYS softwares are opened, CPU core number are adjusted to 8 cores in Solve Process Setting options, together
Shi Ruguo uses professional graphic card then to open GPU figures acceleration function with further raising efficiency, then by the entity
File imports the ANSYS softwares；, it is necessary to which the material parameter for adding the flexible display screen is loaded into the entity text after importing
Flexible display screen in part is physically；
In the ANSYS softwares, the FormNew Part functions of designing in module (DM, Design Modeler) are utilized
The small entity of the multiple regular shape is integrated into a part for including all small entities.Because portion of material layer is relatively thin,
And model can be brought incomplete or distorted when designing module modification model, therefore used in the present invention in SolidWorks softwares
The method for completing splitting object.
Step 105：It is real to the flexible display screen in the entity file using the mesh generation function of the ANSYS softwares
Body carries out mesh generation, obtains the entity with grid；Specifically include：
Using hexahedral mesh, scan, one or more modes in body size Control and face size Control are to each soft
Property display screen entity carry out mesh generation.Mesh generation is the most important part of pre-treatment link.To improve integral grid quality,
Should be respectively to each flexible display screen entity independence grid division, i.e., when the edge true to natureization entity is divided into multiple shapes
During the small entity of shape rule, then need independently to carry out mesh generation to each small entity；If the edge is not forced
Trueization entity is divided, then needs integrally to carry out mesh generation to the edge true to natureization entity.In order to ensure thickness direction
Stress does not produce mutation, the increase degree of convergence, the degree of accuracy, and each film layer should be made to reach control grid requirement in three-dimensional.For
Lattice number is reduced, reduces calculating pressure, ensure simulation nicety, uses hexahedral mesh to carry out mesh generation.The present invention adopts
With manual search or automatically the mode scanned realizes mesh generation, it is possible to reduce number of grid, lifts calculating speed, reduces simultaneously
The grid scale in inessential region.Specially：For thicker basalis grid should be made to be become from bottom to top by dredging in thickness direction
It is close, to meet that manual search mode is preferentially selected in number of grid control and basalis upper grid quality requirement, the process simultaneously.
Scan for the relatively regular thin layer use that can be scanned and controlled with size of mesh opening, then while made for the more complicated entity that can not scan
With hexahedron is preferential and size of mesh opening control is to meet quality requirement, the size of mesh opening control occlusion body size of mesh opening, face
The control devices such as size of mesh opening.This method compares the mode of global grid division, and number of grid can be made to reduce 5-10 times.
When the surface of the flexible display screen entity carries curved surface, increase surface mesh number is to table in the pseudo-entity
Face carries out mesh generation for the part of curved surface；
Whether the parameters for searching the grid meet given threshold, if be unsatisfactory for, the grid is adjusted,
Until parameters are satisfied by given threshold, so as to obtain the entity with grid.The purpose of the process is to ensure entity
Geometry has the mesh-density at significant change to be higher than without the mesh-density at significant change, ensures each layer grid in any side
Upward grid number is satisfied by simulation requirements, i.e., each layer grid in any direction on grid number need more than 3 to 5, also
Ensure that the parameters such as Jacobi rate, element distortion degree and the aspect ratio of grid grid are satisfied by given threshold, i.e., refined gram
Ratio is intended to 1, and element distortion degree is intended to 0, and aspect ratio is intended to 0.
Step 106：Load is applied to the entity with grid, the entity with grid is bent to default song
Rate；The accuracy of load boundary condition has a great influence to simulation result, in order to be needed using symmetry constraint in the band grid
Entity relative two side add without frictional constraint.In order that bottom surface becomes the song of default curvature after load is applied
Face with Remote Displacement functions or with the Remote Displacement functions, it is necessary to have same effect
Method relative two side of the entity with grid is turned over the angle specified rotating around specific point.It is in order that imitative
Very needed closer to actual effect, it is equal in the load that two relative sides apply.Due to meeting when application load is excessive
Large deformation is produced, causes simulation result not restrained, it is therefore desirable to the multiple load steps of load point are applied, and load step load
Increase greatly with deformation is become.
Specifically include：
According to the position of the default curvature estimation pivot；The pivot is the entity with grid
The central point that side is surrounded when being rotated along assigned direction；
Large deformation switch is opened, type will be solved and be arranged to Direct, for relative two to the entity with grid
Individual side applies load, two relative sides is rotated around the pivot, bends the entity with grid
To default curvature.The embodiment of the present invention using making two relative sides be rotated around the pivot so that
The entity with grid bends to the method for default curvature to simulate the actual conditions that the flexible display screen bends,
So as to open the new approaches emulated using bending of the ANSYS softwares to flexible display screen.The process divides load simultaneously
Multiple load steps apply, and can effectively solve the problems, such as that producing large deformation and result does not restrain, and it is imitative to be lifted to reduce iterations
True efficiency.
Step 107：Calculate the stress situation of physically each grid cell with grid.With bottom center position
Thickness direction is Y direction, using draw direction of the bottom center position in loading is applied as X-direction, passes through display
The Stress Map of each stress interlayer Y direction and X-direction represents the stress situation of each stress interlayer, whole by showing
Body strain cloud atlas represents the strained situation of each stressor layers.The each stressor layers of stress situation of comprehensive each stress interlayer are answered
Change situation finds out maximum stress point, layer occurs for maximum stress, maximum stress value is further analyzed, and then by changing model
The methods of shape, thickness or material parameter, further analogue simulation drew prioritization scheme.
Flexible display screen Mechanics Simulation method provided by the invention, realizes the emulation to flexible display screen mechanics, so as to
It instead of and the mechanical property of flexible display screen is evaluated using the means of experiment in the prior art, produced so as to eliminate
The process of more flexible display screen experiment samples and manufacture experimental situation, improve the efficiency of the evaluation to flexible display screen scheme.
Meanwhile a large amount of costs for making flexible display screen experiment sample needed for manufacture experimental situation are also eliminated, reduce early stage
Cost input.It is greatly reduced simultaneously by splitting out block model in rudimentary model so as to handle block model
Modeling process, the size of entity file is reduced, improve the efficiency of emulation, while the pressure for reducing computer also reduces
To the hardware requirement of computer；By carrying out mesh generation to the flexible display screen entity, and gather each grid cell
Stress situation, the regularity of stress collection is ensure that, so as to the stress weak spot for flexible display screen of being more convenient for finding.
Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said
It is bright to be only intended to help the method and its core concept for understanding the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, in specific embodiments and applications there will be changes.In summary, this specification content is not
It is interpreted as limitation of the present invention.
Claims (6)
- A kind of 1. flexible display screen Mechanics Simulation method, it is characterised in that including：Obtain the rudimentary model established according to flexible display screen scheme；The rudimentary model is by multiple identical block model groups Into；The block model is split out from the rudimentary model；The block model is modeled with SolidWorks softwares, obtains the entity file of the block model；The entity file is imported into ANSYS softwares；Grid is carried out using the mesh generation function of the ANSYS softwares to the flexible display screen entity in the entity file to draw Point, obtain the entity with grid；Load is applied to the entity with grid, the entity with grid is bent to default curvature；Calculate the stress situation of physically each grid cell with grid.
- A kind of 2. flexible display screen Mechanics Simulation method according to claim 1, it is characterised in that the utilization SolidWorks softwares are modeled to the block model, are obtained the entity file of the block model, are specifically included：The block model equal proportion is amplified, makes the minimum geometries of the block model soft more than the SolidWorks The full accuracy of part, so as to be amplified model；The entity of the scale-up model is established in the SolidWorks softwares, is amplified entity；Corners processing is carried out to the rib extended in the amplifying entity from bottom surface to top surface, obtains edge true to natureization entity；By the edge true to natureization entity scaled down time and the block model identical size, primary entities are obtained；The primary entities are saved as into entity file.
- 3. a kind of flexible display screen Mechanics Simulation method according to claim 2, it is characterised in that put described to described The rib extended in big entity from bottom surface to top surface carries out corners processing, after obtaining edge true to natureization entity, described by institute Edge true to natureization entity scaled down time and the block model identical size are stated, before obtaining primary entities, in addition to：Judge whether the shape of the edge true to natureization entity is regular；If the edge true to natureization entity is in irregular shape, the edge true to natureization entity is divided into according to shape multiple The small entity of regular shape.
- 4. a kind of flexible display screen Mechanics Simulation method according to claim 3, it is characterised in that described by the entity File imports ANSYS softwares, specifically includes：The ANSYS softwares are opened, the entity file is imported into the ANSYS softwares；In the ANSYS softwares, the small entity of the multiple regular shape is integrated into a bag using functions of modules is designed Containing all small physical components.
- 5. a kind of flexible display screen Mechanics Simulation method according to claim 4, it is characterised in that described in the utilization The mesh generation function of ANSYS softwares carries out mesh generation to the flexible display screen entity in the entity file, obtains band net The entity of lattice, is specifically included：Using hexahedral mesh, scan, one or more modes in body size Control and face size Control are to each flexible aobvious Display screen entity carries out mesh generation；When the surface of the flexible display screen entity carries curved surface, increase surface mesh number is to surface in the pseudo-entity The part of curved surface carries out mesh generation；Whether the parameters for searching the grid meet given threshold, if be unsatisfactory for, the grid is adjusted, until Parameters are satisfied by given threshold, so as to obtain the entity with grid.
- 6. a kind of flexible display screen Mechanics Simulation method according to claim 1, it is characterised in that described to the band net The entity of lattice applies load, the entity with grid is bent to default curvature, specifically includes：According to the position of the default curvature estimation pivot；The pivot is the side of the entity with grid The central point surrounded when being rotated along assigned direction；Load is applied to relative two side of the entity with grid, makes two relative sides around the rotation Central rotation, the entity with grid is set to bend to default curvature.
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| CN111754893A (en) * | 2020-07-06 | 2020-10-09 | 惠州市华星光电技术有限公司 | Method for selecting structural parameters of display panel |
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