CN111175144A - Curl test method and apparatus - Google Patents
Curl test method and apparatus Download PDFInfo
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- CN111175144A CN111175144A CN202010074246.9A CN202010074246A CN111175144A CN 111175144 A CN111175144 A CN 111175144A CN 202010074246 A CN202010074246 A CN 202010074246A CN 111175144 A CN111175144 A CN 111175144A
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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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/08—Testing mechanical properties
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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
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/0202—Control of the test
- G01N2203/0208—Specific programs of loading, e.g. incremental loading or pre-loading
Abstract
The invention discloses a curl testing method and equipment. The curl test method comprises: when a curling test signal is received, controlling a movable mechanism to move in a set direction and a curling shaft to rotate around the axis of the curling shaft so as to stretch or curl the flexible board to be tested, wherein the movable mechanism is used for fixing a first end of the flexible board to be tested, the curling shaft is used for fixing a second end, opposite to the first end, of the flexible board to be tested, and the set direction is vertical to the axis direction of the curling shaft; and in the process of curling or stretching the flexible board to be measured, adjusting the moving speed of the movable mechanism and/or the angular speed of the curling shaft so as to enable the curling speed of the flexible board to be measured positioned on the outermost ring of the curling shaft to be equal to the moving speed of the movable mechanism. The invention solves the problems that the accuracy of the curling test is reduced and the flexible display equipment and the curling test equipment are easy to damage.
Description
Technical Field
The embodiment of the invention relates to the technical field of curl testing, in particular to a curl testing method and equipment.
Background
In the field of displays, flexible display devices that can be bent or rolled up are one of the development directions of next generation display technology. Curl life and curl reliability are among the important properties to measure the quality of such flexible display devices.
However, in the process of curling the flexible display device by using the existing curl test method, the flexible display device is over-tensioned or cannot be kept straight, so that the accuracy of the curl test is reduced, and the flexible display device and the curl test device are easily damaged.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a curl test method and apparatus to solve the problems that the accuracy of a curl test is lowered and a flexible display apparatus and a curl test apparatus are easily damaged.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a curl test method, including:
when a curling test signal is received, controlling a movable mechanism to move in a set direction and a curling shaft to rotate around the axis of the curling shaft so as to stretch or curl the flexible board to be tested, wherein the movable mechanism is used for fixing a first end of the flexible board to be tested, the curling shaft is used for fixing a second end, opposite to the first end, of the flexible board to be tested, and the set direction is vertical to the axis direction of the curling shaft;
and in the process of curling or stretching the flexible board to be measured, adjusting the moving speed of the movable mechanism and/or the angular speed of the curling shaft so as to enable the curling speed of the flexible board to be measured positioned on the outermost ring of the curling shaft to be equal to the moving speed of the movable mechanism.
Optionally, the adjusting the moving speed of the movable mechanism and/or the angular speed of the winding shaft during the stretching or the winding of the flexible board to be tested includes:
increasing the moving speed of the movable mechanism and/or reducing the angular speed of the winding shaft in the process of winding the flexible plate to be tested;
reducing the moving speed of the movable mechanism and/or increasing the angular speed of the winding shaft during the process of stretching the flexible sheet to be measured.
Optionally, the increasing the moving speed of the movable mechanism and/or the decreasing the angular speed of the winding shaft in the process of winding the flexible board to be tested includes:
in the process of curling the flexible board to be measured, keeping the moving speed of the movable mechanism as an initial moving speed, and adjusting the angular speed of the winding shaft to be reduced along with the increase of the number of turns of the flexible board to be measured wound on the winding shaft; alternatively, the first and second electrodes may be,
in the process of curling the flexible plate to be measured, keeping the angular speed of the winding shaft as an initial angular speed, and adjusting the moving speed of the movable mechanism to increase along with the increase of the number of turns of the flexible plate to be measured wound on the winding shaft; alternatively, the first and second electrodes may be,
in the process of curling the flexible board to be measured, the angular speed of the winding shaft is adjusted to be reduced along with the increase of the number of turns of the flexible board to be measured wound on the winding shaft, and the moving speed of the movable mechanism is adjusted to be increased along with the increase of the number of turns of the flexible board to be measured wound on the winding shaft.
Optionally, the reducing the moving speed of the movable mechanism and/or increasing the angular speed of the winding shaft during the stretching of the flexible board to be tested includes:
in the process of stretching the flexible board to be tested, the moving speed of the movable mechanism is kept to be an initial moving speed, and the angular speed of the winding shaft is adjusted to be increased along with the reduction of the number of turns of the flexible board to be tested which is wound on the winding shaft; alternatively, the first and second electrodes may be,
in the process of stretching the flexible plate to be measured, keeping the angular speed of the winding shaft as an initial angular speed, and adjusting the moving speed of the movable mechanism to be reduced along with the reduction of the number of turns of the flexible plate to be measured which is wound on the winding shaft; alternatively, the first and second electrodes may be,
in the process of stretching the flexible board to be measured, the angular speed of the winding shaft is adjusted to increase along with the reduction of the number of turns of the flexible board to be measured which is wound on the winding shaft, and the moving speed of the movable mechanism is adjusted to decrease along with the reduction of the number of turns of the flexible board to be measured which is wound on the winding shaft.
Optionally, the adjusted moving speed of the movable mechanism and the angular speed of the winding shaft satisfy the following formula:
Wn*[R+(n-1)*d]＝Vn；
wherein, WnThe angular speed of the winding shaft when the nth circle of the flexible board to be detected is wound on the winding shaft is obtained; vnThe moving speed of the movable mechanism when the nth circle of the flexible board to be detected is wound on the curling shaft is obtained; n represents the number of turns of the flexible plate to be tested wound on the curling shaft; r is the radius of the crankshaft; d is the thickness of the flexible plate to be tested.
Optionally, the method further comprises:
according to the WnDetermining a time to adjust a speed of movement of the moveable mechanism and/or an angular velocity of the winding shaft.
In a second aspect, an embodiment of the present invention provides a curl test apparatus, including:
the movable mechanism is used for fixing the first end of the flexible board to be tested;
the winding shaft is used for fixing a second end, opposite to the first end, of the flexible plate to be tested;
and the control mechanism is used for controlling the movable mechanism to move in a set direction and the winding shaft to rotate around the axis of the movable mechanism when receiving the winding test signal so as to stretch or wind the flexible plate to be tested, and adjusting the moving speed of the movable mechanism and/or the angular speed of the winding shaft in the process of curling or stretching the flexible plate to be tested so as to enable the winding speed of the flexible plate to be tested, which is positioned at the outermost ring on the winding shaft, to be equal to the moving speed of the movable mechanism, wherein the set direction is vertical to the axis direction of the winding shaft.
Optionally, the movable mechanism includes a movable platform, and the first end of the flexible board to be tested is placed on the upper surface of the movable platform;
preferably, the control mechanism includes a controller and a drive assembly, the controller being electrically connected to the drive assembly, the drive assembly being connected to the movable mechanism and the crimp shaft, respectively; the controller is used for sending a driving control signal to the driving assembly when receiving the curling test signal; the driving assembly is used for controlling the movable mechanism to move in a set direction and the winding shaft to rotate around the axis of the winding shaft according to the driving control signal, and adjusting the moving speed of the movable mechanism and/or the angular speed of the winding shaft in the process of winding or stretching the flexible plate to be tested;
preferably, the drive assembly includes a first motor connected to the movable mechanism and a second motor connected to the crimp shaft.
According to the technical scheme of the embodiment of the invention, in the process of curling or stretching the flexible board to be measured, the moving speed of the movable mechanism and/or the angular speed of the curling shaft are/is adjusted, so that the curling speed of the flexible board to be measured positioned on the outermost ring of the curling shaft is equal to the moving speed of the movable mechanism, and the problems that the flexible board to be measured is excessively tensioned in the process of curling the flexible board to be measured and the flexible board to be measured between the movable mechanism and the curling shaft is extruded and bulges in the process of stretching the flexible board to be measured are solved. Therefore, according to the technical scheme of the embodiment of the invention, in the process of curling or stretching the flexible board to be tested, the problems that the accuracy of the curling test is reduced and the flexible display equipment and the curling test equipment are easy to damage can be solved by adjusting the moving speed of the movable mechanism and/or the angular speed of the curling shaft.
Drawings
The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:
FIG. 1 is a schematic flow chart of a curl testing method provided by an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a flexible board to be tested being fixed according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a flexible board to be tested being curled according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a flexible board to be tested during stretching according to an embodiment of the present invention;
fig. 5 is a block diagram of a curl testing apparatus according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background art, the existing curl test method has the problems that the accuracy of the curl test is reduced and the flexible display device and the curl test device are easily damaged, and the inventor has studied that, during the process of curling or stretching the flexible display device, the number of turns (layers) of the flexible display device wound on the winding shaft is changed, which is equivalent to the change of the radius of the winding shaft, that is, the radial distance from the inner surface to the axis of the winding shaft is different for the flexible display devices of different turns. It is known that the greater the radius of the rotating shaft, the greater the linear velocity of its outer surface, with a constant angular velocity of the rotating shaft. Based on this, in the conventional curl testing method, in the process of curling the flexible display device, since the angular velocity of the winding shaft is kept unchanged in the whole curl testing process, as the number of turns of the flexible display device wound on the winding shaft increases, the linear velocity of the outermost flexible display device is originally increased significantly, but the moving velocity of the movable mechanism is also kept unchanged in the whole curl testing process, and the linear velocity of the outermost flexible display device and the moving velocity of the movable mechanism are limited mutually, so that an acting force, i.e. a tensile force, which reacts against the linear velocity of the outermost flexible display device and the change of the moving velocity of the movable mechanism is generated on the flexible display device between the movable mechanism and the curling shaft, and the tensile force, i.e. the flexible display device, between the movable mechanism and the curling shaft is too large, i.e. the flexible display device is too tensioned, furthermore, the flexible display equipment is easily damaged, and the accuracy of the curling test is influenced; meanwhile, the control mechanism for controlling the movement of the movable mechanism and the curling shaft in the curling test equipment is increased in external resistance, and the control mechanism is easily damaged. In addition, during the process of stretching the flexible display device, on the contrary, a compressive force is generated on the flexible display device between the movable mechanism and the curling shaft, so that the flexible display device between the movable mechanism and the curling shaft is squeezed, and the bulge is easy to occur, thereby affecting the accuracy of the curling test.
Based on the above technical problem, the present embodiment provides the following solutions:
fig. 1 is a schematic flowchart of a curl testing method provided in an embodiment of the present invention, where the present embodiment is applicable to a case of testing a curl or bending performance of a flexible board (e.g., a flexible display panel), the method may be performed by a curl testing apparatus, the curl testing apparatus may be implemented in a software and/or hardware manner, and the curl testing apparatus may be configured in a curl testing apparatus provided in an embodiment of the present invention. As shown in fig. 1, the curl test method provided by the present embodiment may include:
and step 110, when the curling test signal is received, controlling the movable mechanism to move in the set direction and the curling shaft to rotate around the axis of the movable mechanism so as to stretch or curl the flexible board to be tested.
The movable mechanism is used for fixing the first end of the flexible plate to be measured, the curling shaft is used for fixing the second end, opposite to the first end, of the flexible plate to be measured, and the set direction is perpendicular to the axis direction of the curling shaft. The flexible board to be tested can be any flexible, curlable or bendable sheet-shaped or plate-shaped device, which can be a finished product or a semi-finished product, and the thickness, specific material composition and shape of the flexible board are not limited.
Exemplarily, fig. 2 is a schematic structural diagram of a flexible board to be tested when being fixed according to an embodiment of the present invention. Referring to fig. 2, the curl test apparatus in the present embodiment may include a movable mechanism 1, a winding shaft 2, and a control mechanism (not shown in the drawings, and the curl test method in the present embodiment may be performed by the control mechanism). Before the flexible board 10 to be tested is subjected to the curling test, the first end 11 of the flexible board 10 to be tested is fixed on the movable mechanism 1, the second end 12 of the flexible board 10 to be tested is fixed on the curling shaft 2, and the movable mechanism 1 is moved, so that the flexible board 10 to be tested between the movable mechanism 1 and the curling shaft 2 is flattened, and the flexible board 10 to be tested can be stably curled or stretched. In this embodiment, the curling shaft 2 may be provided with a clamping groove, and the second end 12 of the flexible board 10 to be tested is clamped in the clamping groove, so as to avoid the influence of a mechanical structure for fixing the second end 12 of the flexible board 10 to be tested in other ways on the curling operation of the flexible board 10 to be tested; the first end 11 of the flexible board 10 to be tested can be fixed on the movable mechanism 1 by any fixing method, which is not limited in this embodiment.
In this embodiment, the flexible board 10 to be measured moves synchronously with the movable mechanism 1, and the flexible board 10 to be measured can be wound on the winding shaft in cooperation with the rotation of the winding shaft 2. Fig. 3 is a schematic structural diagram of a flexible board to be tested being curled according to an embodiment of the present invention. As shown in fig. 3, the control mechanism controls the movable mechanism 1 to move in a first set direction X, which is perpendicular to the axial direction of the curling shaft 2, and controls the curling shaft 2 to rotate around the axis O thereof in a first direction Y (clockwise in the figure), and the curling operation of the flexible board 10 to be tested is realized by the cooperative control of the moving direction of the movable mechanism 1 and the rotating direction of the curling shaft 2. In addition, fig. 4 is a schematic structural diagram of the flexible board to be tested when being stretched according to the embodiment of the present invention. As shown in fig. 4, after completing one curling operation of the flexible board 10 to be tested, the control mechanism may control the movable mechanism 1 to move in a second set direction X' (opposite to the first set direction) perpendicular to the axial direction of the curling shaft 2, and at the same time, control the curling shaft 2 to rotate around the axis O thereof in a second direction Z (counterclockwise in the figure), and realize an extending operation of the flexible board 10 to be tested by cooperatively controlling the moving direction of the movable mechanism 1 and the rotating direction of the curling shaft 2. Thus, the curling operation and the stretching operation of the flexible board to be tested 10 are repeated a plurality of times to realize the curl test of the flexible board to be tested 10.
And step 120, in the process of curling or stretching the flexible board to be measured, adjusting the moving speed of the movable mechanism and/or the angular speed of the curling shaft so that the curling speed of the flexible board to be measured positioned on the outermost circle of the curling shaft is equal to the moving speed of the movable mechanism.
In the embodiment of the present invention, the extending speed of the flexible board to be tested at the outermost ring is the product of the angular speed of the winding shaft at the corresponding moment and the radial distance from the inner surface of the flexible board to be tested at the outermost ring to the axis of the winding shaft.
The present embodiment may preset the initial moving speed of the movable mechanism and the initial angular speed of the winding shaft, and the initial moving speed of the movable mechanism is matched with the initial angular speed of the winding shaft so that the initial moving speed of the movable mechanism is equal to the linear speed of the surface of the winding shaft. When the control mechanism receives the curling test signal, the movable mechanism is controlled to move at the initial moving speed in the first set direction, and meanwhile, the curling shaft is controlled to rotate at the initial angular speed in the first direction around the axis of the curling shaft, so that the accuracy of the curling test at the starting stage of the curling test is ensured. Along with the winding of the flexible plate to be tested on the curling shaft, namely, the number of turns of the flexible plate to be tested wound on the curling shaft is more and more, the moving speed of the movable mechanism and/or the angular speed of the curling shaft can be adjusted, so that the winding speed of the flexible plate to be tested positioned on the outermost ring of the curling shaft is equal to the moving speed of the movable mechanism, the stretching force applied to the flexible plate to be tested positioned between the curling shaft and the movable mechanism is kept unchanged, the flexible plate to be tested is prevented from being damaged due to over-tensioning, and the accuracy of the curling test is improved.
And then, stretching the flexible board to be tested wound on the curling shaft, and along with the fact that the flexible board to be tested wound on the curling shaft is unfolded between the movable mechanism and the curling shaft, namely, the number of turns of the flexible board to be tested remaining wound on the curling shaft is less and less, adjusting the moving speed of the movable mechanism and/or the angular speed of the curling shaft to enable the unfolding speed of the flexible board to be tested positioned on the outermost ring of the curling shaft to be equal to the moving speed of the movable mechanism, so that the compression force applied to the flexible board to be tested positioned between the curling shaft and the movable mechanism is kept unchanged, the flexible board to be tested is prevented from being bulged due to extrusion, and the accuracy of the curling test is improved.
In addition, the stretching operation of the flexible board to be tested may be regarded as the reverse process of the curling operation of the flexible board to be tested, and thus, in the stretching operation of the flexible board to be tested, the moving speed of the movable mechanism and/or the angular speed of the winding shaft may be adjusted in reverse order of time thereof, according to the moving speed of the movable mechanism and/or the angular speed of the winding shaft adjusted in the curling operation of the flexible board to be tested, until the moving speed of the movable mechanism is equal to the initial moving speed and/or the angular speed of the winding shaft is equal to the initial angular speed.
In this embodiment, in the process of curling or stretching the flexible board to be measured, the moving speed of the movable mechanism may be adjusted independently, or the angular speed of the winding shaft may be adjusted independently, or the moving speed of the movable mechanism and the angular speed of the winding shaft may be adjusted simultaneously, so that the curling speed of the flexible board to be measured positioned on the outermost circle of the winding shaft is equal to the moving speed of the movable mechanism. Therefore, the technical scheme of the embodiment solves the problems that the accuracy of the curling test is reduced, and the flexible display device and the curling test device are easy to damage.
Optionally, in the above technical solution, in the process of stretching or curling the flexible board to be measured, adjusting the moving speed of the movable mechanism and/or the angular speed of the winding shaft includes: in the process of curling the flexible plate to be measured, increasing the moving speed of the movable mechanism and/or reducing the angular speed of the curling shaft; during the stretching of the flexible sheet to be measured, the speed of movement of the movable mechanism is reduced and/or the angular speed of the winding shaft is increased.
For example, in the process of curling the flexible board to be measured, since the number of turns of the flexible board to be measured wound on the curling shaft is gradually increased, the curling speed (linear velocity) of the outermost turn of the flexible board to be measured wound on the curling shaft is increased regardless of the moving speed of the movable mechanism, and the angular velocity of the curling shaft is not changed. Therefore, by increasing the moving speed of the movable mechanism and/or reducing the angular speed of the winding shaft, the moving speed of the movable mechanism and the winding speed of the outermost circle of the flexible plate to be tested can be balanced (equal), so that the tensile force applied to the flexible plate to be tested is basically unchanged, the damage caused by the over-tensioning of the flexible plate to be tested is avoided, and the accuracy of the winding test can be improved.
Specifically, in the process of curling the flexible plate to be measured, the moving speed of the movable mechanism is kept as the initial moving speed, and the angular speed of the winding shaft is adjusted to be reduced along with the increase of the number of turns of the flexible plate to be measured wound on the winding shaft; or, in the process of curling the flexible plate to be measured, keeping the angular speed of the winding shaft as the initial angular speed, and adjusting the moving speed of the movable mechanism to increase along with the increase of the number of turns of the flexible plate to be measured wound on the winding shaft; or, in the process of curling the flexible board to be measured, the angular speed of the adjusting winding shaft is reduced along with the increase of the number of turns of the flexible board to be measured wound on the winding shaft, and the moving speed of the adjusting movable mechanism is increased along with the increase of the number of turns of the flexible board to be measured wound on the winding shaft.
In addition, in order to realize the curling test of the flexible board to be tested, the flexible board to be tested should be curled for a plurality of times, therefore, after the curling operation of the flexible board to be tested is completed, the flexible board to be tested needs to be stretched, and the moving speed of the movable mechanism at the beginning of the stretching operation and the curling speed of the outermost circle of the flexible board to be tested can be the moving speed of the movable mechanism and the curling speed of the outermost circle of the flexible board to be tested which are balanced when the curling operation is finished. Then, in the process of stretching the flexible board to be tested, since the number of turns of the flexible board to be tested wound around the winding shaft is gradually reduced, the stretching speed (linear velocity) of the outermost turn of the flexible board to be tested wound around the winding shaft is reduced without considering the moving speed of the movable mechanism and without changing the angular velocity of the winding shaft. Therefore, by reducing the moving speed of the movable mechanism and/or increasing the angular speed of the winding shaft, the moving speed of the movable mechanism and the winding speed of the outermost circle of the flexible plate to be tested can be balanced, so that the compression force applied to the flexible plate to be tested is basically unchanged, the flexible plate to be tested is prevented from being extruded to bulge, and the accuracy of the winding test can be improved.
Specifically, in the process of stretching the flexible board to be measured, the moving speed of the movable mechanism is kept as the initial moving speed, and the angular speed of the winding shaft is adjusted to increase along with the reduction of the number of turns of the flexible board to be measured which is wound on the winding shaft; or, in the process of stretching the flexible plate to be measured, the angular speed of the winding shaft is kept as the initial angular speed, and the moving speed of the movable mechanism is adjusted to be reduced along with the reduction of the number of turns of the flexible plate to be measured which is wound on the winding shaft; or, in the process of stretching the flexible board to be measured, the angular speed of the adjusting winding shaft is increased along with the reduction of the number of turns of the flexible board to be measured which is wound on the winding shaft, and the moving speed of the adjusting movable mechanism is reduced along with the reduction of the number of turns of the flexible board to be measured which is wound on the winding shaft.
Optionally, based on the above technical solution, in an embodiment of the present invention, during the process of stretching or curling the flexible board to be measured, the moving speed of the adjustable movable mechanism and the angular speed of the winding shaft satisfy the following formula:
Wn*[R+(n-1)*d]＝Vn；
wherein, WnThe angular speed of the winding shaft is the angular speed of the winding shaft when the nth circle of flexible plate to be tested is wound on the winding shaft; vnThe moving speed of the movable mechanism when the nth circle of flexible board to be detected is wound on the curling shaft; n represents the number of turns of the flexible plate to be measured wound on the curling shaft; r is the radius of the winding shaft; d is the thickness of the flexible plate to be measured.
In particular, VnThe initial moving speed of the movable mechanism can be always, at the moment, no matter the number of turns n of the to-be-tested flexible board wound on the winding shaft is increased or reduced, the angular speed of the winding shaft when the number of turns is corresponding is only needed to be adjusted, the winding speed of the to-be-tested flexible board at the outermost turn can be guaranteed to be equal to the moving speed of the movable mechanism, therefore, the flexible display equipment and the curling test equipment are prevented from being damaged, and the accuracy of the curling test is improved. In addition, WnCan always be curledThe initial angular velocity of axle, no matter at this moment, no matter coil the number of turns n of the flexible sheet that awaits measuring that winds on the axle increases or reduces, but only need adjust the moving speed of movable mechanism when corresponding the number of turns, can guarantee that the moving speed of movable mechanism equals with the speed of stretching out of the flexible sheet that awaits measuring of outermost circle to avoid flexible display device and curling test equipment to damage, improve the accuracy of curling test.
Illustratively, with continued reference to fig. 2 and 3, during the curling of the flexible sheet 10 to be measured, the initial movement speed V of the movable mechanism 1 is1Initial angular velocity of the winding shaft 2 is W1. When the winding shaft 2 winds the first circle of flexible board to be tested 10, the radial distance from the inner surface of the first circle of flexible board to be tested 10 to the axis O of the winding shaft 2 is R, n is 1, and at the moment, the winding speed of the first circle of flexible board to be tested 10 is W1R, initial moving speed V of movable mechanism 11Are equal. The present embodiment can keep the moving speed of the movable mechanism 1 unchanged, and as the number of turns of the flexible board to be tested 10 wound on the winding shaft 2 increases, the winding speed of the flexible board to be tested at the outermost turn can be made equal to the moving speed of the movable mechanism by adjusting the angular speed of the winding shaft 2. For example, when the second turn of the flexible board to be tested 10 is wound around the winding shaft 2, the radial distance from the inner surface of the second turn of the flexible board to be tested 10 to the axis O of the winding shaft 2 is R1(R1 ═ R + d), n is 2, and V is 2n＝V1From the above formula, it can be obtained
Therefore, in this embodiment, based on the above formula, when n is an arbitrary value, the same extending speed of the outermost flexible board to be tested and the moving speed of the movable mechanism can be designed, so as to ensure the accuracy of the curling test.
In addition, can be based on WnA time to adjust a moving speed of the movable mechanism and/or an angular speed of the curling shaft is determined. The angular speed W of the winding shaft when winding a circle of flexible plate to be measurednIs fixed and thus can be based on WnCalculating the time required by the flexible plate to be measured to wind one circle, wherein the time is the time for adjusting the movement of the movable mechanismThe time of the dynamic velocity and/or the angular velocity of the crimp shaft.
In another embodiment of the present invention, fig. 5 is a block diagram of a curl testing apparatus provided in an embodiment of the present invention, and as shown in fig. 5, the embodiment of the present invention further provides a curl testing apparatus including a motion control module 100 and a speed adjustment module 200.
The motion control module 100 is configured to, when receiving a curling test signal, control the movable mechanism to move in a set direction and the curling shaft to rotate around the axis thereof, so as to stretch or curl the flexible board to be tested, where the movable mechanism is configured to fix a first end of the flexible board to be tested, the curling shaft is configured to fix a second end of the flexible board to be tested, the second end being opposite to the first end, and the set direction is perpendicular to the axis direction of the curling shaft;
the speed adjusting module 200 is configured to adjust a moving speed of the movable mechanism and/or an angular speed of the winding shaft during the process of winding or unwinding the flexible board to be tested, so that the unwinding speed of the flexible board to be tested located at the outermost circle on the winding shaft is equal to the moving speed of the movable mechanism.
Optionally, the speed adjustment module 200 may include:
the first speed adjusting unit is used for increasing the moving speed of the movable mechanism and/or reducing the angular speed of the rolling shaft in the process of rolling the flexible plate to be measured;
and the first speed adjusting unit is used for reducing the moving speed of the movable mechanism and/or increasing the angular speed of the winding shaft in the process of stretching the flexible plate to be tested.
Alternatively, the first speed adjustment unit may include:
the first speed adjusting subunit is used for keeping the moving speed of the movable mechanism as the initial moving speed in the process of curling the flexible plate to be measured, and adjusting the angular speed of the winding shaft to be reduced along with the increase of the number of turns of the flexible plate to be measured wound on the winding shaft; alternatively, the first and second electrodes may be,
the second speed adjusting subunit is used for keeping the angular speed of the winding shaft as the initial angular speed in the process of winding the flexible plate to be measured, and adjusting the moving speed of the movable mechanism to increase along with the increase of the number of turns of the flexible plate to be measured wound on the winding shaft; alternatively, the first and second electrodes may be,
and the third speed adjusting subunit is used for adjusting the angular speed of the winding shaft to be reduced along with the increase of the number of turns of the to-be-measured flexible plate wound on the winding shaft in the process of winding the to-be-measured flexible plate, and adjusting the moving speed of the movable mechanism to be increased along with the increase of the number of turns of the to-be-measured flexible plate wound on the winding shaft.
Alternatively, the second speed adjustment unit may include:
the fourth speed adjusting subunit is used for keeping the moving speed of the movable mechanism as the initial moving speed in the process of stretching the flexible plate to be measured, and adjusting the angular speed of the winding shaft to increase along with the reduction of the number of turns of the flexible plate to be measured which is wound on the winding shaft; alternatively, the first and second electrodes may be,
a fifth speed adjusting subunit, configured to, during the process of stretching the flexible board to be tested, maintain the angular speed of the winding shaft as an initial angular speed, and adjust the moving speed of the movable mechanism to decrease as the number of turns of the flexible board to be tested remaining wound on the winding shaft decreases; alternatively, the first and second electrodes may be,
and the sixth speed adjusting subunit is used for adjusting the angular speed of the winding shaft to increase along with the reduction of the number of turns of the to-be-measured flexible plate which is wound on the winding shaft, and adjusting the moving speed of the movable mechanism to decrease along with the reduction of the number of turns of the to-be-measured flexible plate which is wound on the winding shaft.
Optionally, the adjusted moving speed of the movable mechanism and the angular speed of the winding shaft satisfy the following formula:
Wn*[R+(n-1)*d]＝Vn；
wherein, WnThe angular velocity of the winding shaft is obtained when n circles of flexible plates to be tested are wound on the winding shaft; vnThe moving speed of the movable mechanism is the moving speed when n circles of flexible plates to be detected are wound on the winding shaft; n represents the number of turns of the flexible plate to be measured wound on the curling shaft; r is the radius of the winding shaft; d is the thickness of the flexible plate to be measured.
The curl testing device provided by the embodiment belongs to the same inventive concept as the curl testing method provided by any embodiment of the invention, can execute the curl testing method provided by any embodiment of the invention, and has corresponding functions and beneficial effects. For technical details not described in detail in this example, reference may be made to the curl test method provided in any of the examples of the present invention.
In addition, a further embodiment of the present invention provides a curl test apparatus, which may refer to fig. 2, comprising a movable mechanism 1, a curl shaft 2, and a control mechanism, wherein the control mechanism may be used to perform the curl test method provided by any of the embodiments of the present invention.
Specifically, the movable mechanism 1 is used for fixing a first end of a flexible board to be tested; the winding shaft 2 is used for fixing a second end, opposite to the first end, of the flexible plate to be tested; the control mechanism is used for controlling the movable mechanism 1 to move in a set direction and the rolling shaft 2 to rotate around the axis of the movable mechanism 1 when receiving the curling test signal so as to stretch or curl the flexible board 10 to be tested, and adjusting the moving speed of the movable mechanism 1 and/or the angular speed of the rolling shaft in the process of curling or stretching the flexible board 10 to be tested so as to enable the rolling speed of the flexible board 10 to be tested positioned on the outermost ring of the rolling shaft 2 to be equal to the moving speed of the movable mechanism 1, wherein the set direction is perpendicular to the axis direction of the rolling shaft.
Optionally, the movable mechanism 1 includes a movable platform, and the first end 11 of the flexible board to be tested 10 is placed on the upper surface of the movable platform; preferably, the control mechanism comprises a controller and a drive assembly, the controller being electrically connected to the drive assembly, the drive assembly being connected to the movable mechanism and the crimp shaft respectively; the controller is used for sending a driving control signal to the driving assembly when receiving the curling test signal; the driving component is used for controlling the movable mechanism 1 to move in a set direction and the winding shaft 2 to rotate around the axis of the movable mechanism 1 and adjusting the moving speed of the movable mechanism 1 and/or the angular speed of the winding shaft in the process of winding or stretching the flexible plate 10 to be tested according to a driving control signal; preferably, the drive assembly includes a first motor connected to the movable mechanism and a second motor connected to the curl shaft.
The curling test equipment provided by the embodiment of the invention can execute the curling test method provided by any embodiment of the invention, and has corresponding functions and beneficial effects.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A curl test method, comprising:
when a curling test signal is received, controlling a movable mechanism to move in a set direction and a curling shaft to rotate around the axis of the curling shaft so as to stretch or curl the flexible board to be tested, wherein the movable mechanism is used for fixing a first end of the flexible board to be tested, the curling shaft is used for fixing a second end, opposite to the first end, of the flexible board to be tested, and the set direction is vertical to the axis direction of the curling shaft;
and in the process of curling or stretching the flexible board to be measured, adjusting the moving speed of the movable mechanism and/or the angular speed of the curling shaft so as to enable the curling speed of the flexible board to be measured positioned on the outermost ring of the curling shaft to be equal to the moving speed of the movable mechanism.
2. The curl test method of claim 1, wherein the adjusting the moving speed of the movable mechanism and/or the angular speed of the winding shaft during the stretching or curling of the flexible sheet to be tested comprises:
increasing the moving speed of the movable mechanism and/or reducing the angular speed of the winding shaft in the process of winding the flexible plate to be tested;
reducing the moving speed of the movable mechanism and/or increasing the angular speed of the winding shaft during the process of stretching the flexible sheet to be measured.
3. The curl test method of claim 2, wherein increasing the moving speed of the movable mechanism and/or decreasing the angular speed of the curling shaft during curling the flexible sheet to be tested comprises:
in the process of curling the flexible board to be measured, keeping the moving speed of the movable mechanism as an initial moving speed, and adjusting the angular speed of the winding shaft to be reduced along with the increase of the number of turns of the flexible board to be measured wound on the winding shaft; alternatively, the first and second electrodes may be,
in the process of curling the flexible plate to be measured, keeping the angular speed of the winding shaft as an initial angular speed, and adjusting the moving speed of the movable mechanism to increase along with the increase of the number of turns of the flexible plate to be measured wound on the winding shaft; alternatively, the first and second electrodes may be,
in the process of curling the flexible board to be measured, the angular speed of the winding shaft is adjusted to be reduced along with the increase of the number of turns of the flexible board to be measured wound on the winding shaft, and the moving speed of the movable mechanism is adjusted to be increased along with the increase of the number of turns of the flexible board to be measured wound on the winding shaft.
4. The curl test method of claim 2, wherein the reducing the moving speed of the movable mechanism and/or increasing the angular velocity of the roll shaft during the stretching of the flexible sheet to be tested comprises:
in the process of stretching the flexible board to be tested, the moving speed of the movable mechanism is kept to be an initial moving speed, and the angular speed of the winding shaft is adjusted to be increased along with the reduction of the number of turns of the flexible board to be tested which is wound on the winding shaft; alternatively, the first and second electrodes may be,
in the process of stretching the flexible plate to be measured, keeping the angular speed of the winding shaft as an initial angular speed, and adjusting the moving speed of the movable mechanism to be reduced along with the reduction of the number of turns of the flexible plate to be measured which is wound on the winding shaft; alternatively, the first and second electrodes may be,
in the process of stretching the flexible board to be measured, the angular speed of the winding shaft is adjusted to increase along with the reduction of the number of turns of the flexible board to be measured which is wound on the winding shaft, and the moving speed of the movable mechanism is adjusted to decrease along with the reduction of the number of turns of the flexible board to be measured which is wound on the winding shaft.
5. The curl test method of claim 1, wherein the adjusted moving speed of the movable mechanism and the angular speed of the winding shaft satisfy the following formula:
Wn*[R+(n-1)*d]＝Vn；
wherein, WnThe angular speed of the winding shaft when the nth circle of the flexible board to be detected is wound on the winding shaft is obtained; vnThe moving speed of the movable mechanism when the nth circle of the flexible board to be detected is wound on the curling shaft is obtained; n represents the number of turns of the flexible plate to be tested wound on the curling shaft; r is the radius of the crankshaft; d is the thickness of the flexible plate to be tested.
6. The curl test method of claim 5, further comprising:
according to the WnDetermining a time to adjust a speed of movement of the moveable mechanism and/or an angular velocity of the winding shaft.
7. A curl test apparatus, comprising:
the movable mechanism is used for fixing the first end of the flexible board to be tested;
the winding shaft is used for fixing a second end, opposite to the first end, of the flexible plate to be tested;
and the control mechanism is used for controlling the movable mechanism to move in a set direction and the winding shaft to rotate around the axis of the movable mechanism when receiving the winding test signal so as to stretch or wind the flexible plate to be tested, and adjusting the moving speed of the movable mechanism and/or the angular speed of the winding shaft in the process of curling or stretching the flexible plate to be tested so as to enable the winding speed of the flexible plate to be tested, which is positioned at the outermost ring on the winding shaft, to be equal to the moving speed of the movable mechanism, wherein the set direction is vertical to the axis direction of the winding shaft.
8. The curl test apparatus of claim 7, wherein the movable mechanism comprises a movable platform, and the first end of the flexible sheet under test is disposed on an upper surface of the movable platform.
9. The curl test apparatus of claim 7, wherein the control mechanism includes a controller and a drive assembly, the controller being electrically connected to the drive assembly, the drive assembly being connected to the movable mechanism and the curl shaft, respectively; the controller is used for sending a driving control signal to the driving assembly when receiving the curling test signal; the driving assembly is used for controlling the movable mechanism to move in a set direction and the winding shaft to rotate around the axis of the winding shaft according to the driving control signal, and adjusting the moving speed of the movable mechanism and/or the angular speed of the winding shaft in the process of winding or stretching the flexible plate to be tested.
10. The curl test apparatus of claim 9, wherein the drive assembly includes a first motor coupled to the movable mechanism and a second motor coupled to the curl shaft.
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| CN111624094A (en) * | 2020-07-08 | 2020-09-04 | 玛尔斯检测技术(苏州)有限公司 | Flexible material curling test platform and method |
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| CN112289950A (en) * | 2020-10-28 | 2021-01-29 | 武汉华星光电半导体显示技术有限公司 | Display device and display device curl testing method |
| CN112722932A (en) * | 2020-12-01 | 2021-04-30 | 合肥维信诺科技有限公司 | Crimping device of flexible display panel |
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