CN111008501B - Curved surface display panel and parameter selection method thereof - Google Patents
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- CN111008501B CN111008501B CN201911329494.7A CN201911329494A CN111008501B CN 111008501 B CN111008501 B CN 111008501B CN 201911329494 A CN201911329494 A CN 201911329494A CN 111008501 B CN111008501 B CN 111008501B
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Abstract
The invention provides a curved surface display panel and a parameter selection method thereof. The parameter selection method of the curved surface display panel comprises the following steps: the method comprises the steps of geometrically modeling a curved display panel, setting a plurality of curved display panels to be detected, acquiring a first internal stress distribution curve, determining the curvature radius of a circular arc, resetting the plurality of curved display panels to be detected, acquiring a second internal stress distribution curve and determining the proportion of straight-line segments. According to the forming requirement of the curved surface display panel, the invention combines finite element simulation, analyzes the variation trend of the internal stress distribution curve and the degumming stress distribution curve of the curved surface display panel in the forming process, and determines the parameters of the curved surface display panel according to the internal stress and the degumming force, thereby obtaining the optimal design scheme and improving the product percent of pass.
Description
Technical Field
The invention relates to the technical field of display, in particular to a curved surface display panel and a parameter selection method thereof.
Background
With the development of the display industry, people have not satisfied the experience of ordinary flat display, and have pursued the sense of curved surface display. However, because glass is a brittle material, strong internal stress is generated when a curved surface is formed, so that a product is easily degummed, leaks light and even breaks, and the service life of the product is seriously influenced.
As shown in fig. 1, which is a cross-sectional view of a conventional curved display panel, the curved display panel 90 includes a lower bottom surface 91 and an upper curved surface 92, the lower bottom surface 91 is a horizontal plane, the upper curved surface 92 is an arched spherical surface, and the upper curved surface 92 includes an arc 921 located in the middle and straight line segments 922 symmetrically distributed at two ends of the arc 921. The curved surface display panel is made of glass, stress exists in the curved surface display panel, and for the curved surface display panel, no clear and effective gluing method exists at present, so that the cover plate of the curved surface display panel is frequently separated in a degumming mode. In order to avoid the phenomenon of cover plate degumming and separation, a large amount of coating is used, so that the light transmittance of the curved display panel is influenced, and the manufacturing cost is increased.
Therefore, there is a need to develop a curved display panel and a method for selecting parameters thereof to overcome the drawbacks of the prior art.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the invention provides the curved surface display panel and the parameter selection method thereof, and the parameters of the curved surface display panel are determined according to the internal stress and the degumming force of the curved surface display panel, so that the optimal design scheme is obtained, and the product percent of pass is improved.
In order to achieve the above object, an embodiment of the present invention provides a method for selecting parameters of a curved display panel, including:
the method comprises the following steps of (1) geometrically modeling a curved surface display panel, wherein the curved surface display panel to be detected is arranged in finite element analysis software, each curved surface display panel comprises a lower bottom surface and an upper curved surface, the lower bottom surface is a horizontal plane, the upper curved surface is an arched spherical surface, the upper curved surface comprises a circular arc positioned in the middle and straight line segments symmetrically distributed at two ends of the circular arc, the curvature radius of the circular arc is R, and the proportion of each straight line segment to the straight line segments of the upper curved surface is S;
setting a plurality of curved surface display panels to be detected, wherein a plurality of different curved surface display panels to be detected are set in finite element analysis software, the straight line segment occupation ratio S of each curved surface display panel is a fixed value, and the curvature radius R of the circular arc is arranged in an arithmetic progression;
acquiring a first internal stress distribution curve, namely acquiring the first internal stress distribution curve of the curved display panel with the same curvature radius and different straight line segment ratios in the forming process through simulation and simulation of finite element analysis software;
determining the curvature radius of the circular arc, setting an acceptable maximum internal stress value, acquiring the maximum internal stress value on the first internal stress distribution curve of each curved surface display panel, comparing and acquiring a curvature radius range smaller than the acceptable maximum internal stress value, and selecting the minimum value in the curvature radius range as the selected circular arc curvature radius;
resetting a plurality of curved display panels to be detected, wherein a plurality of different curved display panels to be detected are set in finite element analysis software, the curvature radius R of the circular arc of each curved display panel is the curvature radius of the selected circular arc, and the proportion S of the straight line segments is in arithmetic progression;
acquiring a second internal stress distribution curve, namely acquiring the second internal stress distribution curve of the selected curved surface display panel with different proportions of straight-line segments of the circular arc curvature radius in the forming process in a simulation and simulation mode of finite element analysis software; and
and determining the proportion of straight line segments, namely acquiring the internal stress value at the midpoint position of the lower bottom surface and the internal stress value at the intersection point position of the arc and the straight line segments in the second internal stress distribution curve, calculating the internal stress standard deviation of each curved surface display panel, and selecting the proportion of the straight line segments with the minimum absolute value corresponding to the internal stress standard deviation as the proportion of the selected straight line segments.
Furthermore, R is more than or equal to 50mm and less than or equal to 2500mm, and S is more than or equal to 1% and less than or equal to 40%.
Further, after the step of obtaining the first internal stress distribution curve and before the step of determining the radius of curvature of the circular arc, the method further includes: acquiring a first degumming stress distribution curve, namely acquiring the first degumming stress distribution curve of a curved display panel with the same curvature radius and different straight line segment ratios in a finite element analysis software simulation mode; wherein the step of determining the radius of curvature of the circular arc further comprises: setting an acceptable maximum degumming stress value, acquiring the maximum degumming stress value on the first degumming stress distribution curve of each curved surface display panel, comparing and acquiring a curvature radius range smaller than the acceptable maximum degumming stress value and the acceptable maximum internal stress value, and selecting a minimum value in the curvature radius range as a selected circular arc curvature radius.
Further, after the step of resetting a plurality of curved display panels to be detected and before the step of determining the proportion of straight line segments, the method further comprises the following steps of: acquiring a second degumming stress distribution curve, namely acquiring the second degumming stress distribution curve of the selected curved surface display panel with different proportions of straight line sections of circular arc curvature radius in a finite element analysis software simulation mode; wherein the step of determining the proportion of straight line segments further comprises the following steps: and obtaining coordinate values of all turning points on the second degumming stress distribution curve, calculating the degumming stress standard deviation of each curved surface display panel, and selecting the straight-line segment proportion with the minimum absolute value corresponding to the degumming stress standard deviation and the internal stress standard deviation as the selected straight-line segment proportion.
Further, the selecting of the absolute value minimum corresponding to the standard deviation of the degumming stress and the standard deviation of the internal stress in the step of determining the proportion of the straight line segments specifically includes:
calculating an internal stress standard deviation, namely acquiring an internal stress value at the midpoint position of the lower bottom surface and an internal stress value at the intersection point position of the circular arc and the straight line segment from the second internal stress distribution curve, and calculating the internal stress standard deviation sigma 1i of each curved display panel as the serial number of the curved display panel;
calculating a degumming stress standard deviation, namely acquiring coordinate values of all turning points on the degumming stress distribution curve in the second degumming stress distribution curve, and calculating the degumming stress standard deviation sigma 2i, i of each curved surface display panel as a serial number of the curved surface display panel; and
selecting a straight line segment proportion step of the curved surface display panel, setting an internal stress weight W1 and a degumming stress weight W2 of the curved surface display panel, and calculating min (W1 | sigma 1i | + W2 | sigma 2i |) as the selected curved surface display panel.
Further, in the step of calculating the internal stress standard deviation, the second internal stress distribution curve takes the length of the lower bottom surface as an X-axis and the magnitude of the internal stress as a Y-axis.
Further, in the step of calculating the standard deviation of the degumming stress, the length of the lower bottom surface is taken as an X axis and the size of the degumming stress is taken as a Y axis in the second degumming stress distribution curve.
Further, after the step of determining the proportion of straight line segments, the method further comprises the following steps:
and determining the gluing position, namely acquiring coordinate values of all turning points on the second degumming stress distribution curve, selecting all wave peak positions, and forming gluing areas at all the wave peak positions and two sides, wherein the width value of the gluing area is in direct proportion to the value of the wave peak position.
Further, in the step of determining the gluing position, the gluing area is arranged on the lower bottom surface, and the width of the gluing area ranges from 10mm to 50mm.
The invention also provides a curved surface display panel determined by the parameter selection method of the curved surface display panel, which comprises a lower bottom surface and an upper curved surface, wherein the lower bottom surface is a horizontal plane, the upper curved surface is an arched spherical surface, the upper curved surface comprises a circular arc positioned in the middle and straight line segments symmetrically distributed at two ends of the circular arc, the curvature radius of the circular arc is R, the proportion of each straight line segment in the straight line segments of the upper curved surface is S, R is more than or equal to 50mm and less than or equal to 2500mm, and S is more than or equal to 1% and less than or equal to 40%.
The invention has the technical effects that according to the forming requirement of the curved surface display panel, the change trends of the internal stress distribution curve and the degumming stress distribution curve of the curved surface display panel in the forming process are analyzed by combining finite element simulation, and the parameters of the curved surface display panel are determined according to the internal stress and the degumming force, so that the optimal design scheme is obtained, and the product percent of pass is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings may be obtained according to these drawings without inventive efforts.
Fig. 1 is a cross-sectional view of a curved display panel of the prior art;
FIG. 2 is a flowchart illustrating a method for selecting parameters of a curved display panel according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a curved display panel according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of the first internal stress profile;
FIG. 5 is a schematic illustration of the second internal stress profile;
fig. 6 is a schematic view of the first degumming stress profile;
fig. 7 is a schematic view of the second degumming stress profile;
fig. 8 is a flowchart of selecting the minimum absolute value of the standard deviation of the degumming stress and the standard deviation of the internal stress corresponding to the step of determining the proportion of the straight line segments in fig. 2.
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. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Referring to fig. 2 and fig. 3, an embodiment of the invention provides a method for selecting parameters of a curved display panel, including the following steps:
s1, a curved surface display panel geometric modeling step, wherein a curved surface display panel to be detected is set in finite element analysis software, as shown in FIG. 3, each curved surface display panel 10 comprises a lower bottom surface 1 and an upper curved surface 2, the lower bottom surface 1 is a horizontal plane, the upper curved surface 2 is an arched spherical surface, the upper curved surface 2 comprises a circular arc 21 positioned in the middle and straight line segments 22 symmetrically distributed at two ends of the circular arc 21, the curvature radius of the circular arc 21 is R, the proportion of each straight line segment 22 in the straight line segments of the upper curved surface 2 is S, wherein R is more than or equal to 50mm and less than or equal to 2500mm, and S is more than or equal to 1% and less than or equal to 40%;
s2, setting a plurality of curved surface display panels 10 to be detected, wherein a plurality of different curved surface display panels 10 to be detected are set in finite element analysis software, the proportion S of the straight line segments of each curved surface display panel 10 is a fixed value, such as 10%, 15% and 20%, and the curvature radius R of the circular arc 21 is arranged in an arithmetic progression;
s3, acquiring a first internal stress distribution curve, namely acquiring the first internal stress distribution curve of the curved display panel 10 with the same curvature radius and different straight line segment ratios in the forming process through simulation and simulation of finite element analysis software; the first internal stress distribution curve is shown in fig. 4, and the curvature radii of the first internal stress distribution curve are 1200mm, 1500mm and 1800mm respectively in fig. 4 as examples;
s4, determining a curvature radius of the circular arc 21, setting an acceptable maximum internal stress value, obtaining the maximum internal stress value on the first internal stress distribution curve of each of the curved display panels 10, comparing and obtaining a curvature radius range smaller than the acceptable maximum internal stress value, selecting a minimum value in the curvature radius range as a selected circular arc curvature radius, and as can be seen from fig. 4, the larger the curvature radius of the circular arc 21 is, the smaller the internal stress is, so that the curved display panel 10 with the larger curvature radius of the circular arc 21 is preferred, and in this embodiment, the selected circular arc curvature radius is equal to 1500mm as an example;
s5, resetting a plurality of curved display panels 10 to be detected, wherein a plurality of different curved display panels 10 to be detected are set in finite element analysis software, the curvature radius R of the circular arc 21 of each curved display panel 10 is the selected circular arc curvature radius, and the linear segment ratio S is arranged in an arithmetic series;
s6, obtaining a second internal stress distribution curve, namely obtaining the second internal stress distribution curve of the selected curved display panel 10 with the circular arc curvature radius different straight line segment ratios in the forming process through finite element analysis software simulation; in this embodiment, the second internal stress distribution curve when the curvature radius of the selected arc is 1500mm and the ratio of the straight line segments is 10%, 15%, and 20% is shown in fig. 5; and
and S7, determining the proportion of straight line segments, acquiring the internal stress value at the midpoint position of the lower bottom surface 1 and the internal stress value at the intersection point position of the circular arc 21 and the straight line segment 22 from the second internal stress distribution curve, calculating the standard deviation of the internal stress of each curved surface display panel 10, selecting the proportion of the straight line segment with the minimum absolute value corresponding to the standard deviation of the internal stress as the proportion of the selected straight line segment, and knowing that the overall performance is better when the proportion of the selected straight line segment is 15% by combining with figure 5.
In this embodiment, after the step S3 of obtaining the first internal stress distribution curve and before the step S4 of determining the radius of curvature of the circular arc 21, the method further includes:
s31, obtaining a first degumming stress distribution curve, and obtaining the first degumming stress distribution curve of the curved display panel 10 with the same curvature radius and different straight line segment ratios through finite element analysis software simulation, where the first degumming stress distribution curve is shown in fig. 6, and the curvature radii of the first degumming stress distribution curve are 1200mm, 1500mm, and 1800mm in fig. 6 as examples;
wherein the step S4 of determining the curvature radius of the circular arc 21 further comprises: setting an acceptable maximum degumming stress value, obtaining the maximum degumming stress value on the first degumming stress distribution curve of each curved display panel 10, comparing and obtaining a curvature radius range smaller than the acceptable maximum degumming stress value and the acceptable maximum internal stress value, selecting a minimum value in the curvature radius range as a selected arc curvature radius, and as can be seen from fig. 4 and 6, the larger the curvature radius of the arc 21 is, the smaller the internal stress and the degumming stress are, so the curved display panel 10 with the larger curvature radius of the arc 21 is preferred, and in this embodiment, the selected arc curvature radius is equal to 1500mm as an example.
Referring to fig. 2, after the step S5 of resetting a plurality of curved display panels 10 to be detected and before the step S7 of determining the straight line segment ratio, the method further includes:
s51, acquiring a second degumming stress distribution curve, namely acquiring the second degumming stress distribution curve of the selected curved display panel 10 with the circular arc curvature radii different in straight line segment proportion through simulation and simulation of finite element analysis software;
wherein in the step S7 of determining the proportion of straight line segments further comprises: obtaining coordinate values of all turning points on the second degumming stress distribution curve, calculating the degumming stress standard deviation of each curved surface display panel 10, and selecting the straight line segment proportion with the minimum absolute value corresponding to the degumming stress standard deviation and the internal stress standard deviation as the selected straight line segment proportion; the second degumming stress distribution curve is shown in fig. 7, so that the overall performance is better when the proportion of the selected straight line segment is 15% by combining fig. 5 and fig. 7.
It is understood that the order of step S51 and step S6 may be interchanged.
Referring to fig. 8, in the present embodiment, the selecting the absolute minimum value corresponding to the standard deviation of the degumming stress and the standard deviation of the internal stress in the step S7 of determining the ratio of the straight line segments specifically includes:
s71, calculating an internal stress standard deviation, obtaining an internal stress value at a midpoint position of the lower bottom surface 1 and an internal stress value at an intersection point position of the circular arc 21 and the straight line segment 22 in the second internal stress distribution curve, and calculating an internal stress standard deviation σ 1i of each curved display panel 10 as a serial number of the curved display panel 10; wherein σ 1i represents the magnitude of the deviation between the selected internal stress values, for quantitatively measuring the magnitude of the variation amplitude between the selected internal stress values;
s72, calculating a degumming stress standard deviation step, namely obtaining coordinate values of all turning points on the degumming stress distribution curve from the second degumming stress distribution curve, and calculating the degumming stress standard deviation sigma 2i of each curved surface display panel 10 as a serial number of the curved surface display panel 10; wherein | σ 2i | represents the deviation magnitude among the degumming stress values at all the selected turning points and is used for quantitatively measuring the variation amplitude among the degumming stress values at all the selected turning points; and
and S73, selecting a straight line segment proportion step of the curved surface display panel 10, setting an internal stress weight W1 and a degumming stress weight W2 of the curved surface display panel 10, and calculating min (W1. Multidot. | sigma 1i | + W2. Multidot. | sigma 2i |) as the selected curved surface display panel 10, so that the degumming stress on the curved surface display panel 10 is uniform, and the degumming phenomenon cannot be caused. The internal stress weight W1 and the degumming stress weight W2 can be adjusted according to actual requirements; if | σ 1i | is N times of | σ 2i |, the weight W1 is basically set to 1/N times of the weight W2, and by adjusting the weights W1 and W2, the curved display panel 10 with uniform and minimum variation amplitude can be obtained by calculating min (W1 | σ 1i | + W2 | σ 2i |), and the curved display panel 10 corresponding to the curve can be found according to the value i, so that the straight line segment occupation ratio and the gluing position can be obtained.
In this embodiment, in the step S71 of calculating the standard deviation of internal stress, the second internal stress distribution curve takes the length of the lower bottom surface 1 as the X axis and the internal stress magnitude as the Y axis, as shown in fig. 5.
In this embodiment, in the step S72 of calculating the standard deviation of the degumming stress, the length of the lower bottom surface 1 is taken as the X axis of the second degumming stress distribution curve, and the magnitude of the degumming stress is taken as the Y axis, as shown in fig. 7.
Referring to fig. 2, after the step S7 of determining the ratio of straight line segments, the method further includes:
s8, determining a gluing position, namely acquiring coordinate values of all turning points on the second degumming stress distribution curve, selecting all wave peak positions, wherein gluing areas are arranged at all the wave peak positions and at two sides, and the width value of the gluing area is in direct proportion to the value of the wave peak position.
In this embodiment, in the step S8 of determining the gluing position, the gluing area is disposed on the lower bottom surface 1, and the width of the gluing area ranges from 10mm to 50mm.
Referring to fig. 3, the present invention further provides a curved display panel 10 determined by the parameter selection method for the curved display panel 10, which includes a lower bottom surface 1 and an upper curved surface 2, wherein the lower bottom surface 1 is a horizontal plane, the upper curved surface 2 is an arched spherical surface, the upper curved surface 2 includes an arc 21 located in the middle and straight line segments 22 symmetrically distributed at two ends of the arc 21, the radius of curvature of the arc 21 is R, the proportion of each straight line segment 22 to the straight line segments of the upper curved surface 2 is S, where R is greater than or equal to 50mm and less than or equal to 2500mm, and S is greater than or equal to 1% and less than or equal to 40%.
The invention has the technical effects that according to the forming requirement of the curved surface display panel, the change trends of the internal stress distribution curve and the degumming stress distribution curve of the curved surface display panel in the forming process are analyzed by combining finite element simulation, and the parameters of the curved surface display panel are determined according to the internal stress and the degumming force, so that the optimal design scheme is obtained, and the product percent of pass is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for selecting parameters of a curved display panel, comprising the steps of:
the method comprises the following steps of (1) geometrically modeling a curved surface display panel, wherein the curved surface display panel to be detected is arranged in finite element analysis software, each curved surface display panel comprises a lower bottom surface and an upper curved surface, the lower bottom surface is a horizontal plane, the upper curved surface is an arched spherical surface, the upper curved surface comprises a circular arc positioned in the middle and straight line segments symmetrically distributed at two ends of the circular arc, the curvature radius of the circular arc is R, and the proportion of each straight line segment to the straight line segments of the upper curved surface is S;
setting a plurality of curved surface display panels to be detected, wherein a plurality of different curved surface display panels to be detected are set in finite element analysis software, the straight line segment occupation ratio S of each curved surface display panel is a fixed value, and the curvature radius R of the circular arc is arranged in an arithmetic progression;
acquiring a first internal stress distribution curve, namely acquiring the first internal stress distribution curve of a curved display panel with the same curvature radius and different straight line segment ratios in the forming process in a finite element analysis software simulation mode;
determining the curvature radius of the circular arc, setting an acceptable maximum internal stress value, acquiring the maximum internal stress value on the first internal stress distribution curve of each curved surface display panel, comparing and acquiring a curvature radius range smaller than the acceptable maximum internal stress value, and selecting the minimum value in the curvature radius range as the selected circular arc curvature radius;
resetting a plurality of curved surface display panels to be detected, wherein a plurality of different curved surface display panels to be detected are set in finite element analysis software, the curvature radius R of the circular arc of each curved surface display panel is the curvature radius of the selected circular arc, and the proportion S of the straight line segments is in arithmetic progression arrangement;
acquiring a second internal stress distribution curve, namely acquiring the second internal stress distribution curve of the selected curved surface display panel with different proportions of straight-line segments of the circular arc curvature radius in the forming process in a simulation and simulation mode of finite element analysis software; and
and determining the proportion of straight line segments, acquiring the internal stress value at the midpoint position of the lower bottom surface and the internal stress value at the intersection point position of the circular arc and the straight line segments in the second internal stress distribution curve, calculating the standard deviation of the internal stress of each curved surface display panel, and selecting the proportion of the straight line segments corresponding to the minimum absolute value of the standard deviation of the internal stress as the proportion of the selected straight line segments.
2. The method for selecting parameters of a curved display panel according to claim 1, wherein R.ltoreq.50 mm.ltoreq.2500mm, S.ltoreq.1% S.ltoreq.40%.
3. The method of claim 1, further comprising, after said step of obtaining a first internal stress profile and before said step of determining the radius of curvature of the arc:
acquiring a first degumming stress distribution curve, namely acquiring the first degumming stress distribution curve of the curved surface display panel with the same curvature radius and different straight line section ratios in a finite element analysis software simulation mode;
wherein in the step of determining the curvature radius of the circular arc, the method further comprises:
setting an acceptable maximum degumming stress value, acquiring the maximum degumming stress value on the first degumming stress distribution curve of each curved surface display panel, comparing and acquiring the curvature radius range smaller than the acceptable maximum degumming stress value and the acceptable maximum internal stress value, and selecting the minimum value in the curvature radius range as the selected arc curvature radius.
4. The method for selecting parameters of a curved display panel according to claim 3, wherein after said step of resetting a plurality of curved display panels to be tested and before said step of determining straight segment ratios, further comprises:
acquiring a second degumming stress distribution curve, namely acquiring the second degumming stress distribution curve of the selected curved surface display panel with different proportions of straight line sections of circular arc curvature radius in a finite element analysis software simulation mode;
wherein the step of determining the proportion of straight line segments further comprises the following steps:
and obtaining coordinate values of all turning points on the second degumming stress distribution curve, calculating the degumming stress standard deviation of each curved surface display panel, and selecting the straight-line segment proportion with the minimum absolute value corresponding to the degumming stress standard deviation and the internal stress standard deviation as the selected straight-line segment proportion.
5. The method for selecting parameters of a curved display panel according to claim 4, wherein the selecting of the minimum absolute value of the standard deviation of the degumming stress and the standard deviation of the internal stress in the step of determining the proportion of straight line segments specifically comprises:
calculating an internal stress standard deviation, namely acquiring an internal stress value at the midpoint position of the lower bottom surface and an internal stress value at the intersection point position of the circular arc and the straight line segment from the second internal stress distribution curve, and calculating the internal stress standard deviation sigma 1i of each curved display panel as the serial number of the curved display panel;
calculating a degumming stress standard deviation, namely acquiring coordinate values of all turning points on the degumming stress distribution curve in the second degumming stress distribution curve, and calculating the degumming stress standard deviation sigma 2i, i of each curved surface display panel as a serial number of the curved surface display panel; and
selecting a straight line segment proportion step of the curved surface display panel, setting an internal stress weight W1 and a degumming stress weight W2 of the curved surface display panel, and calculating min (W1 | sigma 1i | + W2 | sigma 2i |) as the selected curved surface display panel.
6. The method of claim 5, wherein in the step of calculating the standard deviation of the internal stress, the second internal stress profile has a length of the bottom surface as an X-axis and an internal stress as a Y-axis.
7. The method for selecting parameters of a curved display panel according to claim 5, wherein in the step of calculating the standard deviation of the degumming stress, the second degumming stress profile takes the length of the lower base surface as an X-axis and the magnitude of the degumming stress as a Y-axis.
8. The method of claim 1 further comprising, after said step of determining the proportion of straight line segments:
and determining the gluing position, namely acquiring coordinate values of all turning points on the second degumming stress distribution curve, selecting all wave peak positions, and forming gluing areas at all the wave peak positions and two sides, wherein the width value of the gluing area is in direct proportion to the value of the wave peak position.
9. The method of claim 8, wherein in the step of determining the glue position, the glue area is disposed on the lower surface, and a width of the glue area ranges from 10mm to 50mm.
10. A curved display panel determined by the method for selecting parameters of a curved display panel according to any one of claims 1 to 8, comprising a lower bottom surface and an upper curved surface, the lower bottom surface being a horizontal surface, the upper curved surface being an arched spherical surface, the upper curved surface comprising a circular arc in the middle and linear segments symmetrically distributed at both ends of the circular arc, the circular arc having a radius of curvature R, each of the linear segments occupying a ratio of S to the linear segment of the upper curved surface, wherein 50mm < R < 2500mm,1% < S < 40%.
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| CN114137749B (en) * | 2021-12-01 | 2023-11-28 | 惠州华星光电显示有限公司 | Display panel testing method and device |
Citations (3)
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| JPH0660195A (en) * | 1992-08-06 | 1994-03-04 | Fujitsu Ltd | Curved surface display device |
| CN108108582A (en) * | 2018-02-27 | 2018-06-01 | 吉林大学 | A kind of method for numerical simulation of curved-surface piece flexible rolling forming process |
| CN108548729A (en) * | 2018-03-30 | 2018-09-18 | 佛山市诺威科技有限公司 | A kind of method and apparatus measuring material maximum stress in bend |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0660195A (en) * | 1992-08-06 | 1994-03-04 | Fujitsu Ltd | Curved surface display device |
| CN108108582A (en) * | 2018-02-27 | 2018-06-01 | 吉林大学 | A kind of method for numerical simulation of curved-surface piece flexible rolling forming process |
| CN108548729A (en) * | 2018-03-30 | 2018-09-18 | 佛山市诺威科技有限公司 | A kind of method and apparatus measuring material maximum stress in bend |
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