A flexible OLED screen life test device for folding screens

Abstract

The present application relates to the technical field of OLED screens, a flexible OLED screen life test device for folding screens, comprising a fixing frame, the fixing frame comprising a base and a fixing member for fixing the OLED screen, wherein the fixing member comprises a positioning plate and a rotating plate, and the rotating plate is rotatably connected to the positioning plate through clamping plates on both sides, the spacing between the clamping plate and the rotating shaft is adjustable, and the width of one end of the clamping plate close to the rotating shaft is greater than the thickness of the other end, the outer side surface of the clamping plate is provided with a strip-shaped limiting groove distributed along the length direction of its outer side surface, wherein a limiting slider is provided in the strip-shaped limiting groove, and the limiting slider is connected to an end wall of the strip-shaped limiting groove close to the rotating shaft through an elastic element; a driving mechanism, the driving mechanism comprises a driving ring located on both sides of the fixing frame, the arc surface of the driving ring is provided with a groove adapted to the limiting slider on the side of the clamping plate, wherein the driving ring is driven by a motor, and the motor is connected to a PLC controller. The present application can perform a stable bending life test on the OLED screen and improve the test accuracy.

Description

Technical Field

[0001] The present application relates to the technical field of OLED screens, and in particular to a flexible OLED screen life testing device for folding screens. Background Art

[0002] Flexible screen refers to flexible OLED. The successful mass production of flexible screen is not only of great benefit to the manufacturing of a new generation of high-end smartphones, but also has a profound impact on the application of wearable devices due to its low power consumption and bendable characteristics. In the future, flexible screens will be widely used with the continuous penetration of personal smart terminals. The display panel needs to be tested before leaving the factory, and the physical anti-fatigue performance of the flexible screen needs to be tested.

[0003] Chinese patent CN112362315B discloses a flexible OLED screen life test device for a folding screen, including a test substrate, the test substrate is provided with a test cavity, a support rod is fixedly provided on the right wall of the test cavity, a camera is fixedly provided on the left end of the support rod, and an arc groove is symmetrically provided on the left wall of the test cavity, an arc rack is fixedly provided on the outer wall of the arc groove, and a motion clamping mechanism is provided in the arc groove. By using this device, the flexible screen can be repeatedly bent by setting a ring bending mechanism, and the minimum bending angle can be set due to the setting of the arc switching device. In this way, the influence of different bending angles on the bending service life of the flexible screen can be studied, which is conducive to studying the optimal bending use angle and providing strong data support for application in consumer products.

[0004] The annular bending mechanism provided in the existing patent can bend the flexible OLED screen repeatedly, and the minimum bending angle can be set. However, for the use of flexible screens in existing digital devices such as folding screen mobile phones, the flexible screen needs to be folded 180° and be able to open and close in forward and reverse directions. Therefore, a test device that can test the life of such a folding screen is urgently needed. Summary of the invention

[0005] In order to overcome the problems existing in the prior art, the present application provides a flexible OLED screen life testing device for a folding screen.

[0006] The flexible OLED screen life test device for a folding screen provided in this application adopts the following technical solution:

[0007] A flexible OLED screen life test device for a folding screen comprises a fixing frame, the fixing frame comprises a base and a fixing part for fixing the OLED screen, wherein the fixing part comprises a positioning plate and a rotating plate, and the rotating plate is rotatably connected to the positioning plate through clamping plates on both sides, the spacing between the clamping plate and the rotating shaft is adjustable, and the width of one end of the clamping plate close to the rotating shaft is greater than the thickness of the other end, and the outer side surface of the clamping plate is provided with a strip-shaped limiting groove distributed along the length direction of the outer side surface thereof, wherein a limiting slider is provided in the strip-shaped limiting groove, and the limiting slider is connected to an end wall of the strip-shaped limiting groove close to the rotating shaft through an elastic element; a driving mechanism, the driving mechanism comprises driving rings located on both sides of the fixing frame, the arc-shaped surfaces of the driving rings are provided with grooves adapted to the limiting sliders on the side surfaces of the clamping plate, wherein the driving rings are driven by a motor, and the motor is connected to a PLC controller.

[0008] By adopting the above technical solution, the fixing part installed on the base of the device is used to fix the OLED screen to be tested, wherein the positioning plate is fixed during the test. The clamping plate clamps the rotating plate and rotates under the action of the driving mechanism, so that the OLED screen placed on the fixing part can be subjected to a bending test, wherein the driving mechanism drives the driving ring to rotate under the program set by the PLC controller, and the groove provided on the driving ring cooperates with the limit slider on the outer side of the clamping plate to drive the rotating plate to rotate, and the width of the clamping plate decreases from close to the rotating shaft to far away from the rotating shaft, because the centers of the rotating shaft and the driving ring are not on the same axis, the limit slider slides in the strip limit groove under the action of the driving ring, and because the width of one end of the clamping plate close to the rotating shaft is greater than the thickness of the other end, the limit slider will be separated from the driving ring in the process of moving from the rotating shaft end to the other side, and moves close to the rotating shaft end under the action of the elastic element, and the limit slider is reset.

[0009] Preferably, the positioning plate is fixedly mounted on the base, and a rotating shaft is provided at one end of the positioning plate close to the rotating plate, wherein rotating plates are fixed at both ends of the rotating shaft, and an adjusting mechanism is installed on the outer side of the rotating plate.

[0010] Preferably, the adjustment mechanism comprises a protrusion installed on the outer side of the rotating plate, wherein the protrusion is provided with a through hole, and a driving gear and a driven gear are distributed along one side of the through hole, wherein the driven gear is located on both sides of the driving gear.

[0011] Preferably, the clamping plate includes a U-shaped clamping plate that cooperates with the side of the rotating plate and an L-shaped connecting plate close to the side of the positioning plate, wherein a rack is provided on the right-angled side of the free end of the L-shaped connecting plate, and the rack is meshed with the driving gear on the rotating plate for transmission.

[0012] By adopting the above technical solution, the positioning plate is fixedly installed on the base, the end of the rotating plate is rotatably connected to the rotating shaft with rotating plates at both ends, and the adjustment mechanism installed on the outer side of the rotating plate can adjust the axial distance between the clamping plate and the rotating shaft, thereby changing the bending curvature of the OLED screen. The adjustment mechanism drives the rack on the L-shaped connecting plate at the end of the clamping plate to move up and down through the rotation of the active wheel, and the driven gears on both sides of the driving gear play an auxiliary role, so that the free end of the L-shaped connecting plate with the rack can move stably in the through hole of the protrusion, thereby realizing the adjustment of the axial distance between the clamping plate and the rotating shaft.

[0013] Preferably, when the limit slider in the strip limit groove is located close to one end of the rotating shaft, the limit slider can be clamped in the groove on the drive ring, and when the limit slider in the strip limit groove is located away from one end of the rotating shaft, the limit slider can slip out of the groove of the drive ring.

[0014] Preferably, the strip-shaped limiting groove includes a limiting portion at the bottom and a sliding portion at the top, wherein the limiting portion is wider than the sliding portion, and the limiting sliding block includes a cylindrical seat adapted to the limiting portion and a sliding block adapted to the sliding portion, wherein the bottom of the sliding block is slidably connected to the top mounting groove of the cylindrical seat through a spring.

[0015] Preferably, a slide groove adapted to the movable track of the rotating plate is opened on the inner side of the driving ring, wherein the starting point of the slide groove is located inside the groove, and the end point of the slide groove is connected to one side of the rotation direction of the groove.

[0016] By adopting the above technical solution, when the driving ring on one side of the device rotates, it can drive the limit slider to move in the strip limit groove, and at the same time drive the clamping plate to rotate along the shaft to bend the OLED screen. When the rotating plate reaches the bending end, the limit slider slips off the inner side of the driving ring. Under the action of the elastic element, the limit slider moves along the inner wall of the driving ring toward one end of the shaft. At this time, the sliding block on the limit slider is compressed in the cylindrical seat. When the limit slider enters the slide groove that matches the moving track of the rotating plate, the sliding block rebounds from the cylindrical seat. The driving ring on this side continues to rotate, and the limit slider will enter the groove along the slide groove. At the same time, the driving ring on the other side repeats the above operation to drive the OLED screen from the bending end to the bending starting point. Repeat the above operation to perform repeated bending tests on the OLED screen.

[0017] Preferably, an arc-shaped supporting surface is installed on one side of the bottom of the rotating shaft close to the OLED screen to be tested, and the arc-shaped supporting surface is connected to the rotating shaft through a fixing rod.

[0018] Preferably, both ends of the arc-shaped supporting surface are provided with arc-shaped edges curled inwards.

[0019] By adopting the above technical solution, the arc-shaped supporting surface installed at the bottom of the rotating shaft can be used to fit the OLED screen to be tested, and inwardly curled arc edges are provided at both ends of the arc-shaped supporting surface to avoid damage to the OLED plane.

[0020] Preferably, a lifting mechanism is also installed at the bottom of the positioning plate.

[0021] By adopting the above technical solution, the lifting mechanism arranged at the bottom of the positioning plate adjusts the height of the positioning plate to adapt to the height of the rotating plate, so that the rotating plate and the positioning plate are in the same horizontal plane, controlling the test variables and improving the test accuracy of the OLED screen.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The adjustment mechanism installed on the outer side of the rotating plate in this application can adjust the axial distance between the clamping plate and the rotating shaft, thereby changing the bending curvature of the OLED screen, which is suitable for testing the OLED screens of folding screen digital products with different thicknesses;

[0024] 2. This application uses a set program PLC controller and a motor to drive the driving ring to rotate to drive the OLED screen to be tested to bend back and forth, thereby achieving efficient and stable testing and improving test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a flexible OLED screen life test device for folding screens;

[0026] Figure 2 It is a top view of a flexible OLED screen life test device for a folding screen;

[0027] Figure 3 It is a schematic diagram of the internal structure of a clamping plate and an adjustment mechanism in a flexible OLED screen life test device for a folding screen;

[0028] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0029] Description of reference numerals:

[0030] 1. Fixed frame; 11. Base; 12. Fixing piece; 2. Positioning plate; 21. Lifting mechanism; 3. Rotating plate; 31. Rotating shaft; 311. Arc-shaped supporting surface; 312. Arc-shaped edge; 32. Rotating plate; 33. Clamping plate; 331. U-shaped clamping plate; 332. L-shaped connecting plate; 333. Rack; 34. Adjusting mechanism; 341. Protrusion; 342. Through hole; 343. Driving gear; 344. Driven gear; 4. Strip-shaped limiting groove; 41. Elastic element; 42. Limiting part; 43. Sliding part; 5. Limiting slider; 51. Cylindrical seat; 52. Sliding block; 6. Driving mechanism; 61. Driving ring; 611. Groove; 612. Slide; 62. Motor; 63. PLC controller. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] An embodiment of the present application discloses a flexible OLED screen life test device for a folding screen.

[0033] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4A flexible OLED screen life test device for a folding screen comprises a fixing frame 1, the fixing frame 1 comprises a base 11 and a fixing member 12 for fixing the OLED screen, wherein the fixing member 12 comprises a positioning plate 2 and a rotating plate 3, and the rotating plate 3 is rotatably connected to the positioning plate 2 through clamping plates 33 on both sides, the spacing between the clamping plate 33 and the rotating shaft 31 is adjustable, and the width of one end of the clamping plate 33 close to the rotating shaft 31 is greater than the thickness of the other end, and the outer side surface of the clamping plate 33 is provided with a strip-shaped limiting groove 4 distributed along the length direction of the outer side surface thereof, wherein a limiting slider 5 is provided in the strip-shaped limiting groove 4, and the limiting slider 5 is connected to an end wall of the strip-shaped limiting groove 4 close to the rotating shaft 31 through an elastic element 41; a driving mechanism 6, the driving mechanism 6 comprises a driving ring 61 located on both sides of the fixing frame 1, and the arc surface of the driving ring 61 is provided with a groove 611 adapted to the limiting slider 5 on the side of the clamping plate 33, wherein the driving ring 61 is driven by a motor 62, and the motor 62 is connected to a PLC controller 63. The fixing member 12 installed on the base 11 of the device is used to fix the OLED screen to be tested, wherein the positioning plate 2 is fixed during the test. The clamping plate 33 clamps the rotating plate 3 and rotates under the action of the driving mechanism 6, so that the OLED screen placed on the fixing part 12 can be subjected to a bending test. The driving mechanism 6 drives the driving ring 61 to rotate under the program set by the PLC controller 63, and the motor 62 drives the driving ring 61 to rotate. The groove 611 provided on the driving ring 61 cooperates with the limiting slider 5 on the outer side of the clamping plate 33 to drive the rotating plate 3 to rotate, and the width of the clamping plate 33 decreases from close to the rotating shaft 31 to away from the rotating shaft 31. Because the centers of the rotating shaft 31 and the driving ring 61 are not on the same axis, the limiting slider 5 slides in the strip limiting groove 4 under the action of the driving ring 61. Since the width of one end of the clamping plate 33 close to the rotating shaft 31 is greater than the thickness of the other end, the limiting slider 5 will separate from the driving ring 61 in the process of moving from the rotating shaft 31 end to the other side, and move to the end close to the rotating shaft 31 under the action of the elastic element 41, and the limiting slider 5 is reset.

[0034] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4The positioning plate 2 is fixedly mounted on the base 11, and a rotating shaft 31 is provided at one end of the positioning plate 2 close to the rotating plate 3, wherein rotating plates 32 are fixed at both ends of the rotating shaft 31, and an adjusting mechanism 34 is installed on the outer side of the rotating plate 32. The adjusting mechanism 34 includes a protrusion 341 installed on the outer side of the rotating plate 32, wherein a through hole 342 is opened on the protrusion 341, and a driving gear 343 and a driven gear 344 are distributed along one side of the through hole 342, wherein the driven gear 344 is located on both sides of the driving gear 343. The clamping plate 33 includes a U-shaped clamping plate 331 matched with the side of the rotating plate 3 and an L-shaped connecting plate 332 close to one side of the positioning plate 2, wherein a rack 333 is provided on the right angle side of the free end of the L-shaped connecting plate 332, and the rack 333 is meshed with the driving gear 343 on the rotating plate 32 for transmission. The positioning plate 2 is fixedly mounted on the base 11, and the end of the rotating plate 3 is rotatably connected to the rotating shaft 31 with rotating plates 32 at both ends. The adjustment mechanism 34 installed on the outer side of the rotating plate 32 can adjust the axial distance between the clamping plate 33 and the rotating shaft 31, thereby changing the bending curvature of the OLED screen. The adjustment mechanism 34 drives the rack 333 on the L-shaped connecting plate 332 at the end of the clamping plate 33 to move up and down through the rotation of the active wheel, and the driven gears 344 on both sides of the driving gear 343 play an auxiliary role, allowing the free end of the L-shaped connecting plate 332 with the rack 333 to stably move in the through hole 342 of the protrusion 341, thereby realizing the adjustment of the axial distance between the clamping plate 33 and the rotating shaft 31.

[0035] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4When the limiting slider 5 in the strip limiting groove 4 is located near the end of the rotating shaft 31, the limiting slider 5 can be clamped in the groove 611 on the driving ring 61. When the limiting slider 5 in the strip limiting groove 4 is located away from the end of the rotating shaft 31, the limiting slider 5 can slip out of the groove 611 of the driving ring 61. The strip limiting groove 4 includes a limiting portion 42 at the bottom and a sliding portion 43 at the top, wherein the width of the limiting portion 42 is greater than the sliding portion 43, and the limiting slider 5 includes a cylindrical seat 51 adapted to the limiting portion 42 and a sliding block 52 adapted to the sliding portion 43, wherein the bottom of the sliding block 52 is slidably connected to the top mounting groove of the cylindrical seat 51 through a spring. A sliding groove 612 adapted to the moving track of the rotating plate 3 is provided on the inner side of the driving ring 61, wherein the starting point of the sliding groove 612 is located inside the groove 611, and the end point of the sliding groove 612 is connected to one side of the rotation direction of the groove 611. When the driving ring 61 on one side of the device rotates, it can drive the limit slider 5 to move in the strip limit groove 4, and at the same time drive the clamping plate 33 to rotate along the rotating shaft 31 to bend the OLED screen. When the rotating plate 3 reaches the bending end, the limit slider 5 slips off the inner side of the driving ring 61. Under the action of the elastic element 41, the limit slider 5 moves along the inner wall of the driving ring 61 toward one end of the rotating shaft 31. At this time, the sliding block 52 on the limit slider 5 is compressed in the cylindrical seat 51. When the limit slider 5 enters the slide groove 612 that matches the moving track of the rotating plate 3, the sliding block 52 rebounds from the cylindrical seat 51. The driving ring 61 on this side continues to rotate, and the limit slider 5 will enter the groove 611 along the slide groove 612. At the same time, the driving ring 61 on the other side repeats the above operation to drive the OLED screen from the bending end to the bending start. The above operation is repeated to perform repeated bending tests on the OLED screen.

[0036] Reference Figure 1 A curved support surface 311 is installed on the side of the bottom of the rotating shaft 31 close to the OLED screen to be tested, and the curved support surface 311 is connected to the rotating shaft 31 through a fixing rod. Both ends of the curved support surface 311 are provided with curved edges 312 curled inwards. The curved support surface 311 installed at the bottom of the rotating shaft 31 can be used to fit the OLED screen to be tested, and the curved edges 312 curled inwards are provided at both ends of the curved support surface 311, which can avoid damage to the OLED plane.

[0037] Reference Figure 1 A lifting mechanism 21 is also installed at the bottom of the positioning plate 2. The lifting mechanism 21 arranged at the bottom of the positioning plate 2 adjusts the height of the positioning plate 2 to adapt the height of the rotating plate 3, so that the rotating plate 3 and the positioning plate 2 are in the same horizontal plane, control the test variables, and improve the test accuracy of the OLED screen.

[0038] Working principle: First, the distance between the rotating plate 3 and the axis of the rotating shaft 31 is adjusted through the adjustment mechanism 34, and the height of the positioning plate 2 is adjusted accordingly, so that the rotating plate 3 and the positioning plate 2 used to fix the OLED screen to be tested are at the same height, and the clamping plate 33 clamps the rotating plate 3 with the OLED screen fixed. When the driving ring 61 on one side of the device rotates, it can drive the limit slider 5 to move in the strip limit groove 4, and at the same time drive the clamping plate 33 along the rotation of the rotating shaft 31 to bend the OLED screen. When the rotating plate 3 reaches the bending end, the limit slider 5 slips off the inner side of the driving ring 61. Under the action of the elastic element 41, the limit slider 5 moves along the inner wall of the driving ring 61 toward one end of the rotating shaft 31. At this time, the sliding block 52 on the limit slider 5 is compressed in the cylindrical seat 51. When the limit slider 5 enters the slide groove 612 adapted to the active trajectory of the rotating plate 3, the sliding block 52 rebounds from the cylindrical seat 51. The driving ring 61 on this side continues to rotate, and the limiting slider 5 will enter the groove 611 along the slide groove 612. At the same time, the driving ring 61 on the other side repeats the above operation to drive the OLED screen from the bending end point to the bending starting point, and repeats the above operation to perform repeated bending tests on the OLED screen.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flexible OLED screen life test device for a folding screen, characterized in that: include A fixing frame (1), the fixing frame (1) comprising a base (11) and a fixing member (12) for fixing an OLED screen, wherein the fixing member (12) comprises a positioning plate (2) and a rotating plate (3), and the rotating plate (3) is rotatably connected to the positioning plate (2) via clamping plates (33) on both sides, the spacing between the clamping plate (33) and the rotating shaft (31) is adjustable, and the width of one end of the clamping plate (33) close to the rotating shaft (31) is greater than the thickness of the other end, and the outer side surface of the clamping plate (33) is provided with a strip-shaped limiting groove (4) distributed along the length direction of the outer side surface, wherein a limiting slider (5) is provided in the strip-shaped limiting groove (4), and the limiting slider (5) is connected to an end wall of the strip-shaped limiting groove (4) close to the rotating shaft (31) via an elastic element (41); A driving mechanism (6), the driving mechanism (6) comprising driving rings (61) located on both sides of the fixing frame (1), the arc surface of the driving ring (61) being provided with a groove (611) adapted to the side limit slider (5) of the clamping plate (33), wherein the driving ring (61) is driven by a motor (62), and the motor (62) is connected to a PLC controller (63); The positioning plate (2) is fixedly mounted on the base (11); a rotating shaft (31) is provided at one end of the positioning plate (2) close to the rotating plate (3); rotating plates (32) are fixed at both ends of the rotating shaft (31); and an adjusting mechanism (34) is installed on the outer side of the rotating plate (32); The adjustment mechanism (34) comprises a protrusion (341) installed on the outer side of the rotating plate (32), wherein a through hole (342) is opened on the protrusion (341), and a driving gear (343) and a driven gear (344) are distributed along one side of the through hole (342), wherein the driven gear (344) is located on both sides of the driving gear (343); The clamping plate (33) comprises a U-shaped clamping plate (331) matched with the side of the rotating plate (3) and an L-shaped connecting plate (332) close to the side of the positioning plate (2), wherein a rack (333) is provided on the right-angled side of the free end of the L-shaped connecting plate (332), and the rack (333) is meshed with a driving gear (343) on the rotating plate (32) for transmission; The strip-shaped limiting groove (4) comprises a limiting portion (42) at the bottom and a sliding portion (43) at the top, wherein the limiting portion (42) is wider than the sliding portion (43), and the limiting sliding block (5) comprises a cylindrical seat (51) adapted to the limiting portion (42) and a sliding block (52) adapted to the sliding portion (43), wherein the bottom of the sliding block (52) is slidably connected to the top mounting groove of the cylindrical seat (51) through a spring; The inner side of the driving ring (61) is provided with a slide groove (612) adapted to the moving track of the rotating plate (3), wherein the starting point of the slide groove (612) is located inside the groove (611), and the end point of the slide groove (612) is connected to one side of the rotation direction of the groove (611).

2. The flexible OLED screen life test device for a folding screen according to claim 1, characterized in that: When the limiting slider (5) in the strip-shaped limiting groove (4) is located at one end close to the rotating shaft (31), the limiting slider (5) can be clamped in the groove (611) on the driving ring (61); when the limiting slider (5) in the strip-shaped limiting groove (4) is located at one end away from the rotating shaft (31), the limiting slider (5) can slip out of the groove (611) of the driving ring (61).

3. The flexible OLED screen life test device for a folding screen according to claim 1, characterized in that: An arc-shaped support surface (311) is installed on one side of the bottom of the rotating shaft (31) close to the OLED screen to be tested, and the arc-shaped support surface (311) is connected to the rotating shaft (31) via a fixing rod.

4. The flexible OLED screen life test device for a folding screen according to claim 3, characterized in that: Both ends of the arc-shaped supporting surface (311) are provided with arc-shaped edges (312) curled inwards.

5. The flexible OLED screen life test device for a folding screen according to claim 1, characterized in that: A lifting mechanism (21) is also installed at the bottom of the positioning plate (2).

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