Device and method for testing wear resistance of OCA (Optical Clear Adhesive) coating for display equipment

Abstract

The invention relates to the technical field of optical cement coating testing, in particular to an OCA optical cement coating wear resistance testing device for display equipment, which comprises a bottom plate, and a vertical plate and a supporting assembly are arranged at the top of the bottom plate. Gas is preset in the sealing cavity, so that the pressure in the sealing cavity is larger than the atmospheric pressure, the air pressure in the sealing cavity is constant, the two sliding plates can slide synchronously, and when an elastic metal sheet is locally sunken or a round rod has certain loss, an air pressure detection sensor detects that the instantaneous pressure value is smaller than the constant pressure value, and the air pressure detection sensor detects that the instantaneous pressure value is smaller than the constant pressure value. When the OCA optical cement body is pressed, the abutting force of a left round rod on the OCA optical cement body is reduced, an air pressure detection sensor transmits a signal to an external controller, the controller controls a micro inflator pump and a surge tank to inflate the sealing cavity, and on the contrary, when an elastic metal sheet locally protrudes, the controller controls an electronic pressure release valve to deflate, and the sealing cavity is sealed. And the abutting force on the surface of the OCA optical cement body is kept constant, so that dynamic lamination is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of optical adhesive coating testing, and in particular to an abrasion resistance testing device and method for an OCA optical adhesive coating for a display device. Background Art

[0002] OCA is a special adhesive used to bond transparent optical components. It is required to be colorless and transparent, with a light transmittance of more than 95%, good bonding strength, and can be cured at room temperature or medium temperature. It has the characteristics of small curing shrinkage. It is one of the important raw materials for touch screens. According to different thicknesses, it can be applied to different fields. Its main uses are: electronic paper, transparent device bonding, projection screen assembly, display assembly, lens assembly, resistive touch screen G+F+F, F+F, capacitive touch screens, panels, ICON and glass and polycarbonate and other plastic materials bonding. It is a special adhesive used to bond transparent optical components (such as lenses, etc.). During the production process, the OCA optical adhesive coating needs to be wear tested using wear-resistant testing equipment.

[0003] The curvature of the curved screen causes significant differences in the forces applied to the surface of the OCA optical adhesive. The edges and bending areas are subject to higher tensile, compressive, and shear stresses (especially in curved screens with high curvature). The risk of wear is much higher than that of flat screens. Therefore, it is necessary to conduct wear resistance tests on OCA optical adhesives with a certain curvature.

[0004] The traditional friction head used in the wear resistance test of horizontal OCA optical adhesive cannot dynamically fit with the curved OCA optical adhesive. During the polishing process, local pressure is easily excessive or insufficient, resulting in inconsistent polishing force, affecting the test results. At the same time, the friction head will produce wear after polishing for a certain period of time, and the pressing force of the polishing head on the surface of the OCA optical adhesive will be reduced, which will also affect the accuracy of the test results. Therefore, we propose an OCA optical adhesive coating wear resistance test device and method for display devices to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide an apparatus and method for testing the wear resistance of an OCA optical adhesive coating for a display device, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an OCA optical adhesive coating wear resistance testing device for display equipment, comprising a base plate, a vertical plate and a supporting assembly are arranged on the top of the base plate, an optical film arc-shaped adhesion table is connected to the right side of the supporting assembly, an OCA optical adhesive body is fixed on the arc surface of the optical film arc-shaped adhesion table, a curved top arc assembly is arranged on the left side of the vertical plate, an elastic metal sheet is connected to the left side of the curved top arc assembly, the elastic metal sheet forms a curved surface with the same curvature as that of the optical film arc-shaped adhesion table through the curved top arc assembly, a curved synchronous bonding assembly is arranged between the OCA optical adhesive body and the elastic metal sheet, and the curved synchronous bonding assembly rubs the OCA optical adhesive body up and down through the lifting assembly to achieve wear resistance testing.

[0007] Further preferably, the curved surface synchronous bonding component includes a rectangular block, a cylinder is provided through the interior of the rectangular block, two symmetrically arranged sliding grooves are opened inside the cylinder, a slide is slidably connected in the slide groove, the two slide grooves are connected by a circular tube to form a sealed cavity, gas is preset in the sealed cavity, so that the pressure in the sealed cavity is greater than the atmospheric pressure, the outer side of the slide is connected to a sliding rod, the sliding rod extends to the outside of the cylinder and is fixed with a rectangular rod, the outer side of the rectangular rod is connected to a round rod, the round rods on both sides are in contact with the OCA optical adhesive body and the elastic metal sheet respectively, and an air pressure detection sensor is provided in the circular tube. When the curvature of the elastic metal sheet and the OCA optical adhesive body is the same, the value of the air pressure detection sensor is constant during the lifting process, and the constant air pressure in the sealed cavity enables the two slides to slide synchronously, and the pressing force on the OCA optical adhesive body is constant. When the value of the air pressure detection sensor is not constant, the pressing force on the OCA optical adhesive body is not constant. An intra-cavity air pressure constant maintaining component is provided on the rectangular block, and the air pressure in the sealed cavity is corrected by the intra-cavity air pressure constant maintaining component.

[0008] Further preferably, the component for maintaining constant air pressure in the cavity includes a micro air pump, a pressure-stabilizing tank, an electronic pressure relief valve and an external controller. The micro air pump is fixed on the front side of the rectangular block, the pressure-stabilizing tank and the electronic pressure relief valve are arranged in the rectangular block, the air inlet of the micro air pump is connected to the outside world, the air filling port of the micro air pump is connected to the pressure-stabilizing tank, the pressure-stabilizing tank is connected to the circular tube through a connecting pipe, one end of the electronic pressure relief valve is connected to the circular tube through a connecting pipe, and the other end is connected to the outside world. When the elastic metal sheet is partially concave, the air pressure detection sensor measures an instantaneous pressure value less than the constant pressure value, and the pressing force of the left round rod on the OCA optical adhesive body is reduced. The air pressure detection sensor transmits a signal to the external controller, which controls the micro air pump and the pressure-stabilizing tank to inflate the sealed cavity. Conversely, when the elastic metal sheet is partially convex, the controller controls the electronic pressure relief valve to deflate, so that the pressing force on the surface of the OCA optical adhesive body remains constant.

[0009] Further preferably, through holes are provided on both sides of the cylinder, and the space formed by the outer side surface of the slide plate and the inner wall of the slide groove is connected to the outside through the through holes.

[0010] Further preferably, the lifting assembly includes a motor, the motor is fixed on the base plate, the end of the output shaft of the motor is fixedly connected to a screw, the top of the base plate is fixedly connected to two square rods, the top of the square rod is fixedly connected to the top plate, the top of the screw is rotatably connected to the top plate through a bearing, the rectangular block is threadedly connected to the screw, the rectangular block is slidably sleeved on the outside of the square rod, and the two square rods are symmetrically arranged at an oblique angle.

[0011] Further preferably, the curved top arc assembly includes multiple groups of electric push rods, which are fixedly connected to the left side of the vertical plate, one group of electric push rods is arranged at the horizontal position of the midpoint of the elastic metal sheet, and the remaining groups of electric push rods are symmetrically arranged on the upper and lower sides, the movable end of the electric push rod at the horizontal position of the midpoint is fixedly connected to the push rod, the push rod is fixedly connected to the elastic metal sheet, and the movable ends of the remaining groups of electric push rods are fixedly connected to the arc-shaped rubber block, which is in movable contact with the elastic metal sheet.

[0012] Further preferably, the device also includes a sliding limit assembly for limiting the upper and lower ends of the elastic metal sheet. The sliding limit assembly includes four cross bars, which are fixedly connected to the vertical plates. The left end of the cross bar is rotatably connected to a slider via a hinge. Four slide rails are fixedly connected to the right side of the elastic metal sheet. The sliders are slidably connected to the corresponding slide rails, and the top of the slide rail at the upper position and the bottom of the slide rail at the lower position are fixedly connected to limit blocks.

[0013] Further preferably, the support assembly includes a support rod, which is fixedly connected to the top of the base plate, and the right side of the support rod is slidably connected to a connecting seat, and the right side of the connecting seat is fixedly connected to the optical film arc adhesion table through a preset threaded hole, and the connecting seat can slide up and down and be fixed on the outside of the support rod, so that the midpoint of the optical film arc adhesion table and the midpoint of the elastic metal sheet are in the same horizontal position.

[0014] Further preferably, the round rods on both sides are embedded in the rectangular rod, the round rod on the left is fixedly connected to the rectangular rod, the round rod on the right is rotatably connected to the rectangular rod, and a grinding sheet is fixedly connected to the side surface of the round rod on the left.

[0015] A method for using an OCA optical adhesive coating wear resistance testing device for a display device, the method comprising the following steps: S1: Install the optical film arc-shaped adhesion table on the support rod and fix it, and fix the OCA optical adhesive body on the optical film arc-shaped adhesion table to form a curved state for wear resistance testing; S2: The movable end of the electric push rod pushes the elastic metal sheet to form an arc surface with the same curvature as the optical film arc-shaped bonding table. The left round rod contacts the OCA optical adhesive body, and the right round rod contacts the arc surface of the elastic metal sheet. S3: The motor drives the curved surface synchronous bonding assembly to move back and forth. The constant air pressure in the sealed cavity enables the two round rods to move synchronously along the curved surface. The polishing disc on the left round rod reciprocates to polish the curved OCA optical adhesive body. S4: When the air pressure detection sensor measures the pressure change in the sealed cavity, the pressing force on the OCA optical adhesive body changes, and the pressure value increases. The air pressure detection sensor transmits the signal to the external controller, which controls the micro air pump and the pressure-stabilizing tank to inflate the sealed cavity. Conversely, when the pressure value decreases, the controller controls the electronic pressure relief valve to release the air, so that the pressing force on the surface of the OCA optical adhesive body remains constant. S5: After reciprocating up and down friction for a period of time, the transmittance T, surface roughness RA and thickness H of the polished OCA optical adhesive body are measured by a spectrophotometer, a contact surface profiler and a laser measuring instrument respectively to evaluate its wear resistance.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention pre-sets gas in the sealed chamber to maintain a pressure greater than atmospheric pressure. The constant air pressure within the sealed chamber enables the two slides to slide synchronously. When the right round rod passes over the curved protrusion, the slide rod drives the slide to the left. Under the action of the air pressure, the left slide slides the same distance to the left, bringing the left round rod into contact with the OCA optical adhesive body. At the same time, the pressure within the sealed chamber is greater than atmospheric pressure, and the thrust of the left round rod on the OCA optical adhesive body is the same as the thrust of the right round rod on the elastic metal sheet. This ensures that the thrust of the left round rod on the OCA optical adhesive body remains constant during the lifting process. 2. The present invention measures the air pressure within the sealed cavity using an air pressure sensor disposed within the circular tube. When the elastic metal sheet and the OCA optical adhesive body have the same curvature, the air pressure sensor reading remains constant during the lifting and lowering process. This constant air pressure within the sealed cavity enables the two slides to slide synchronously, maintaining a constant pressure on the OCA optical adhesive body. When the air pressure sensor reading is inconsistent, the pressure on the OCA optical adhesive body is also inconsistent. A cavity pressure maintenance component is provided on the rectangular block to correct the air pressure within the sealed cavity. 3. In the present invention, when the elastic metal sheet is partially concave or the round rod is damaged to a certain extent, the air pressure detection sensor measures an instantaneous pressure value that is less than the constant pressure value, and the pressing force of the left round rod on the OCA optical adhesive body is reduced. The air pressure detection sensor transmits the signal to the external controller, and the controller controls the micro air pump and the pressure-stabilizing tank to inflate the sealed cavity, increasing the pressure in the sealed cavity to keep it consistent with the original pressure, thereby compensating for the reduced pressing force. Conversely, when the elastic metal sheet is partially bulged, the controller controls the electronic pressure relief valve to deflate, and the pressure in the sealed cavity is reduced to the same as the original pressure, so that the pressing force on the surface of the OCA optical adhesive body can be kept constant, thereby achieving dynamic bonding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main three-dimensional structure of the present invention; Figure 2 Schematic diagrams of the connection between the curved surface synchronous bonding component of the present invention and the bent elastic metal sheet and the OCA optical adhesive body at different positions; Figure 3 Schematic diagram of the three-dimensional structure of the curved surface synchronous bonding component of the present invention; Figure 4 This is a schematic diagram of the internal cross-sectional plan structure of the cylinder of the present invention; Figure 5 This is a schematic diagram of the elastic metal sheet of the present invention being connected to the round rod when a bulge appears locally; Figure 6 This is a schematic diagram of the elastic metal sheet of the present invention being connected to the round rod when a local depression occurs; Figure 7 This is a schematic diagram of the contact between the round rod and the OCA optical adhesive during polishing of the present invention; Figure 8 This is a schematic diagram of the connection structure between the grinding sheet and the round rod of the present invention; Figure 9 This is a structural diagram of the sliding limit assembly of the present invention; Figure 10 This is a schematic diagram of the three-dimensional structure of the support assembly of the present invention; Figure 11 It is a schematic diagram of the three-dimensional structure of the curved top arc component of the present invention.

[0018] In the figure: 1, bottom plate; 2, vertical plate; 3, elastic metal sheet; 4. Curved top arc assembly; 5. Electric push rod; 6. Ejector rod; 7. Arc-shaped rubber block; 8. Support assembly; 9. Support rod; 10. Connecting seat; 11. Optical film arc-shaped adhesion platform; 12. OCA optical adhesive body; 13. Curved surface synchronous bonding component; 14. Rectangular block; 15. Cylinder; 16. Slide; 17. Slide plate; 18. Circular tube; 19. Sealed cavity; 20. Sliding rod; 21. Rectangular rod; 22. Circular rod; 23. Through hole; 24. Air pressure detection sensor; 25. Lifting assembly; 26. Square rod; 27. Top plate; 28. Motor; 29. Screw; 30. In-cavity air pressure constant maintenance component; 31. Micro air pump; 32. Pressure regulating tank; 33. Electronic pressure relief valve; 34. Controller; 35. Sliding limit assembly; 36. Cross bar; 37. Slide rail; 38. Slider; 39. Limit block; 40. Grinding disc. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention. Example

[0020] See also Figure 1-11 The present invention provides a technical solution: an abrasion resistance testing device for an OCA optical adhesive coating used in a display device, comprising a bottom plate 1, a riser 2 and a support assembly 8 provided on the top of the bottom plate 1, an optical film arc-shaped adhesion platform 11 connected to the right side of the support assembly 8, an OCA optical adhesive body 12 fixed to the arc surface of the optical film arc-shaped adhesion platform 11, a curved top arc assembly 4 provided on the left side of the riser 2, an elastic metal sheet 3 connected to the left side of the curved top arc assembly 4, the elastic metal sheet 3 forming a curved surface with the same curvature as the optical film arc-shaped adhesion platform 11 through the curved top arc assembly 4, a curved surface synchronous bonding assembly 13 provided between the OCA optical adhesive body 12 and the elastic metal sheet 3, the curved surface synchronous bonding assembly 13 reciprocatingly rubbing the OCA optical adhesive body 12 up and down via a lifting assembly 25 to achieve abrasion resistance testing; It should be noted that gas is preset in the sealed cavity 19, so that the pressure in the sealed cavity 19 is greater than the atmospheric pressure. The constant air pressure in the sealed cavity 19 enables the two slides 17 to slide synchronously. When the right round rod 22 passes through the curved protrusion, the slide 17 is driven to slide to the left by the slide rod 20, and the left slide 17 slides to the left the same distance under the action of air pressure, so that the left round rod 22 contacts the OCA optical adhesive body 12. At the same time, the pressure in the sealed cavity 19 is greater than the atmospheric pressure. The thrust of the left round rod 22 on the OCA optical adhesive body 12 is the same as the thrust of the right round rod 22 on the elastic metal sheet 3, thereby achieving a constant thrust of the left round rod 22 on the OCA optical adhesive body 12 during the lifting process.

[0021] In this embodiment, specifically: the curved surface synchronous bonding component 13 includes a rectangular block 14, a cylinder 15 is provided inside the rectangular block 14, two symmetrically arranged slide grooves 16 are opened inside the cylinder 15, a slide plate 17 is slidably connected in the slide groove 16, the two slide grooves 16 are connected through a circular tube 18, the two slide plates 17 are connected to the inner wall of the slide groove 16 through the circular tube 18 and form a sealed cavity 19, gas is preset in the sealed cavity 19, so that the pressure in the sealed cavity 19 is greater than the atmospheric pressure, the outer side of the slide plate 17 is fixedly connected to the sliding rod 20, the sliding rod 20 extends to the outside of the cylinder 15 and is fixed with a rectangular rod 21, the sliding rod 20 is slidably connected to the cylinder 15, the outer side of the rectangular rod 21 is connected to a round rod 22, the round rods 22 on both sides are in contact with the OCA optical adhesive body 12 and the elastic metal sheet 3 respectively, and an air pressure detection sensor 24 is provided in the circular tube 18; Under the above settings, when the elastic metal sheet 3 and the OCA optical adhesive body 12 have the same curvature, the value of the air pressure detection sensor 24 is constant during the lifting process, and the air pressure in the sealed cavity 19 is constant, so that the two slides 17 can slide synchronously, and the pressing force on the OCA optical adhesive body 12 is constant. When the value of the air pressure detection sensor 24 is not constant, the pressing force on the OCA optical adhesive body 12 is not constant. The rectangular block 14 is provided with an intra-cavity air pressure constant maintaining component 30, and the air pressure in the sealed cavity 19 is corrected by the intra-cavity air pressure constant maintaining component 30; In this embodiment, specifically: the cavity air pressure constant maintaining component 30 includes a micro air pump 31, a pressure stabilizing tank 32, an electronic pressure relief valve 33 and an external controller 34, the micro air pump 31 is fixed on the front side of the rectangular block 14, the pressure stabilizing tank 32 and the electronic pressure relief valve 33 are arranged in the rectangular block 14, the air inlet of the micro air pump 31 is connected to the outside, the air filling port of the micro air pump 31 is connected to the pressure stabilizing tank 32, the pressure stabilizing tank 32 is connected to the circular tube 18 through a connecting pipe, one end of the electronic pressure relief valve 33 is connected to the circular tube 18 through a connecting pipe, and the other end is connected to the outside; Under the above setting, when the elastic metal sheet 3 is partially concave, the air pressure detection sensor 24 measures an instantaneous pressure value that is less than the constant pressure value, and the pressing force of the left round rod 22 on the OCA optical adhesive body 12 is reduced. The air pressure detection sensor 24 transmits a signal to the external controller 34, which controls the micro air pump 31 and the pressure-stabilizing tank 32 to inflate the sealed cavity 19. Conversely, when the elastic metal sheet 3 is partially convex, the controller 34 controls the electronic pressure relief valve 33 to release air, so that the pressing force on the surface of the OCA optical adhesive body 12 remains constant. It should be further explained that the air pressure detection sensor 24 is model BMP581, which has very high accuracy and can measure air pressure fluctuations as low as 7.6μg with a relative accuracy of ±0.06hPa; the controller 34 is model ZB520, which can receive pressure data in real time and dynamically adjust the pressure in the cavity; the electronic pressure relief valve 33 is model FlucomLPS 20 / 0-N, which can achieve precise deflation and pressure relief through remote control via an external controller; the micro air pump 31 is model TQN262-10, which has a large air flow rate and can instantly compensate for the air pressure in the cavity; the pressure regulating tank 32 is model SMC AW30-02BG, which can effectively reduce air pressure fluctuations; In this embodiment, specifically: through holes 23 are opened on both sides of the cylinder 15, and the space formed by the outer side surface of the slide plate 17 and the inner wall of the chute 16 is connected to the outside through the through holes 23; In this embodiment, specifically: the lifting assembly 25 includes a motor 28, which is fixed to the base plate 1. The end of the output shaft of the motor 28 is fixedly connected to a screw 29. The top of the base plate 1 is fixedly connected to two square rods 26. The top of the square rod 26 is fixedly connected to the top plate 27. The top of the screw 29 is rotatably connected to the top plate 27 through a bearing. The rectangular block 14 is threadedly connected to the screw 29. The rectangular block 14 is slidably sleeved on the outside of the square rod 26. The two square rods 26 are symmetrically arranged at an oblique angle, so that they can avoid the connecting pipe and achieve limit at the same time. In this embodiment, specifically: the curved top arc assembly 4 includes multiple groups of electric push rods 5, the electric push rods 5 are fixedly connected to the left side of the vertical plate 2, one group of electric push rods 5 is arranged at the midpoint horizontal position of the elastic metal sheet 3, and the remaining groups of electric push rods 5 are symmetrically arranged on the upper and lower sides, the movable end of the electric push rod 5 at the midpoint horizontal position is fixedly connected to the push rod 6, the push rod 6 is fixedly connected to the elastic metal sheet 3, and the movable ends of the remaining groups of electric push rods 5 are fixedly connected to the arc-shaped rubber block 7, which is in active contact with the elastic metal sheet 3; In this embodiment, specifically: the device also includes a sliding limit assembly 35 for limiting the upper and lower ends of the elastic metal sheet 3, the sliding limit assembly 35 includes four cross bars 36, the cross bars 36 are fixedly connected to the vertical plate 2, the left end of the cross bar 36 is rotatably connected to a slider 38 through a hinge, and four slide rails 37 are fixedly connected to the right side of the elastic metal sheet 3. The sliders 38 are slidably connected to the corresponding slide rails 37, and the top of the slide rail 37 at the upper position and the bottom of the slide rail 37 at the lower position are fixedly connected to the limit stopper 39; In this embodiment, specifically, the support assembly 8 includes a support rod 9, which is fixedly connected to the top of the base plate 1. The right side of the support rod 9 is slidably connected to a connecting seat 10. The right side of the connecting seat 10 is fixedly connected to the optical film arc-shaped adhesion platform 11 through a preset threaded hole. The connecting seat 10 can slide up and down and be fixed on the outer side of the support rod 9, so that the midpoint of the optical film arc-shaped adhesion platform 11 and the midpoint of the elastic metal sheet 3 are at the same horizontal position. In this embodiment, specifically: the round rods 22 on both sides are embedded in the rectangular rod 21, the round rod 22 on the left is fixedly connected to the rectangular rod 21, the round rod 22 on the right is rotatably connected to the rectangular rod 21, and the side portion of the left round rod 22 is fixedly connected to the grinding sheet 40; A method for using an OCA optical adhesive coating wear resistance testing device for a display device, the method comprising the following steps: S1: Install the optical film arc-shaped adhesion platform 11 on the support rod 9 and fix it, and fix the OCA optical adhesive body 12 on the optical film arc-shaped adhesion platform 11 to form a curved state for wear resistance testing; S2: The movable end of the electric push rod 5 pushes the elastic metal sheet 3 to form an arc surface with the same curvature as the optical film arc-shaped adhesion platform 11. The left round rod 22 contacts the OCA optical adhesive body 12, and the right round rod 22 contacts the arc surface of the elastic metal sheet 3; S3: The motor 28 drives the curved surface synchronous bonding assembly 13 to move up and down reciprocatingly. The air pressure in the sealed cavity 19 is constant, so that the two round rods 22 can move synchronously along the curved surface. The polishing sheet 40 on the left round rod 22 reciprocates to polish the curved OCA optical adhesive body 12. S4: When the air pressure detection sensor 24 detects a change in the air pressure in the sealed cavity 19, the pressing force on the OCA optical adhesive body 12 changes, and the pressure value increases. The air pressure detection sensor 24 transmits a signal to the external controller 34, which controls the micro air pump 31 and the pressure-stabilizing tank 32 to inflate the sealed cavity 19. Conversely, when the pressure value decreases, the controller 34 controls the electronic pressure relief valve 33 to release the air, so that the pressing force on the surface of the OCA optical adhesive body 12 remains constant. S5: After reciprocating up and down friction for a period of time, the transmittance T, surface roughness RA and thickness H of the polished OCA optical adhesive body 12 are measured by a spectrophotometer, a contact surface profiler and a laser measuring instrument respectively to evaluate its wear resistance.

[0022] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wear resistance testing device for an OCA optical adhesive coating for a display device, comprising a base plate (1), characterized in that: A vertical plate (2) and a support assembly (8) are provided on the top of the bottom plate (1); an optical film arc-shaped adhesion table (11) is connected to the right side of the support assembly (8); an OCA optical adhesive body (12) is fixed on the arc surface of the optical film arc-shaped adhesion table (11); a curved top arc assembly (4) is provided on the left side of the vertical plate (2); an elastic metal sheet (3) is connected to the left side of the curved top arc assembly (4); the elastic metal sheet (3) forms a curved surface with the same curvature as that of the optical film arc-shaped adhesion table (11) through the curved top arc assembly (4); a curved synchronous bonding assembly (13) is provided between the OCA optical adhesive body (12) and the elastic metal sheet (3); the curved synchronous bonding assembly (13) rubs the OCA optical adhesive body (12) in a reciprocating manner up and down through a lifting assembly (25) to achieve a wear resistance test.

2. The abrasion resistance testing device for an OCA optical adhesive coating for a display device according to claim 1, characterized in that: The curved surface synchronous fitting component (13) includes a rectangular block (14), a cylinder (15) is provided inside the rectangular block (14), two symmetrically arranged slide grooves (16) are provided inside the cylinder (15), a slide plate (17) is slidably connected in the slide groove (16), the two slide grooves (16) are connected through a circular tube (18) to form a sealed cavity (19), gas is preset in the sealed cavity (19), so that the pressure in the sealed cavity (19) is greater than the atmospheric pressure, the outer side of the slide plate (17) is connected to a slide rod (20), the slide rod (20) extends to the outside of the cylinder (15) and is fixed with a rectangular rod (21), the outer side of the rectangular rod (21) A round rod (22) is connected, and the round rods (22) on both sides are in contact with the OCA optical adhesive body (12) and the elastic metal sheet (3) respectively. An air pressure detection sensor (24) is provided in the round tube (18). The air pressure in the sealed cavity (19) is constant so that the two slides (17) can achieve synchronous sliding. The thrusts of the two round rods (22) are the same. The air pressure detection sensor (24) is used to detect whether the pressing force on the OCA optical adhesive body (12) is constant. An intracavity air pressure constant maintaining component (30) is provided on the rectangular block (14). The air pressure in the sealed cavity (19) is corrected by the intracavity air pressure constant maintaining component (30).

3. The abrasion resistance testing device for an OCA optical adhesive coating for a display device according to claim 2, characterized in that: The cavity air pressure constant maintaining component (30) includes a micro air pump (31), a pressure stabilizing tank (32), an electronic pressure relief valve (33) and an external controller (34), the micro air pump (31) is fixed on the front side of the rectangular block (14), the pressure stabilizing tank (32) and the electronic pressure relief valve (33) are arranged in the rectangular block (14), the air inlet of the micro air pump (31) is connected to the outside world, the air inlet of the micro air pump (31) is connected to the pressure stabilizing tank (32), the pressure stabilizing tank (32) is connected to the circular tube (18) through a connecting pipe, one end of the electronic pressure relief valve (33) is connected to the circular tube (18) through a connecting pipe, and the other end is connected to the outside world. When the elastic metal sheet (3) is partially concave, the air pressure detection sensor (24) measures an instantaneous pressure value that is less than the constant pressure value, and the pressing force of the left round rod (22) on the OCA optical adhesive body (12) is reduced. The air pressure detection sensor (24) transmits a signal to an external controller (34), and the controller (34) controls the micro air pump (31) and the pressure-stabilizing tank (32) to inflate the sealed cavity (19). Conversely, when the elastic metal sheet (3) is partially convex, the controller (34) controls the electronic pressure relief valve (33) to deflate, so that the pressing force on the surface of the OCA optical adhesive body (12) remains constant.

4. The abrasion resistance testing device for an OCA optical adhesive coating for a display device according to claim 3, characterized in that: Through holes (23) are provided on both sides of the cylinder (15), and the space formed by the outer side surface of the slide plate (17) and the inner wall of the slide groove (16) is connected to the outside through the through holes (23).

5. The abrasion resistance testing device for an OCA optical adhesive coating for a display device according to claim 4, characterized in that: The lifting assembly (25) includes a motor (28), which is fixed on the base plate (1). The end of the output shaft of the motor (28) is fixedly connected to a screw (29). The top of the base plate (1) is fixedly connected to two square rods (26). The top of the square rod (26) is fixedly connected to the top plate (27). The top of the screw (29) is rotatably connected to the top plate (27) through a bearing. The rectangular block (14) is threadedly connected to the screw (29). The rectangular block (14) is slidably sleeved on the outside of the square rod (26). The two square rods (26) are symmetrically arranged at an oblique angle.

6. The abrasion resistance testing device for an OCA optical adhesive coating for a display device according to claim 5, characterized in that: The curved top arc component (4) includes a plurality of electric push rods (5), which are fixedly connected to the left side of the vertical plate (2), wherein one group of electric push rods (5) is arranged at a horizontal position at the midpoint of the elastic metal sheet (3), and the remaining groups of electric push rods (5) are symmetrically arranged on the upper and lower sides, and the movable ends of the electric push rods (5) at the horizontal position of the midpoint are fixedly connected to a push rod (6), and the push rod (6) is fixedly connected to the elastic metal sheet (3), and the movable ends of the remaining groups of electric push rods (5) are fixedly connected to an arc-shaped rubber block (7), and the arc-shaped rubber block (7) is in movable contact with the elastic metal sheet (3).

7. The abrasion resistance testing device for an OCA optical adhesive coating for a display device according to claim 6, characterized in that: The device further comprises a sliding limit assembly (35) for limiting the upper and lower ends of the elastic metal sheet (3). The sliding limit assembly (35) comprises four cross bars (36). The cross bars (36) are fixedly connected to the vertical plate (2). The left end of the cross bar (36) is connected to a slider (38) by a hinge. Four slide rails (37) are fixedly connected to the right side of the elastic metal sheet (3). The sliders (38) are slidably connected to the corresponding slide rails (37). The top of the slide rail (37) at the upper position and the bottom of the slide rail (37) at the lower position are both fixedly connected to the limit block (39).

8. The abrasion resistance testing device for an OCA optical adhesive coating for a display device according to claim 7, characterized in that: The support assembly (8) includes a support rod (9), the support rod (9) is fixedly connected to the top of the base plate (1), the right side of the support rod (9) is slidably connected to a connecting seat (10), the right side of the connecting seat (10) is fixedly connected to the optical film arc-shaped adhesion table (11) through a preset threaded hole, and the connecting seat (10) can slide up and down and be fixed on the outside of the support rod (9), so that the midpoint of the optical film arc-shaped adhesion table (11) and the midpoint of the elastic metal sheet (3) are at the same horizontal position.

9. The abrasion resistance testing device for an OCA optical adhesive coating for a display device according to claim 8, characterized in that: The round rods (22) on both sides are embedded in the rectangular rod (21), the round rod (22) on the left side is fixedly connected to the rectangular rod (21), the round rod (22) on the right side is rotatably connected to the rectangular rod (21), and the side surface of the round rod (22) on the left side is fixedly connected to a grinding sheet (40).

10. The method for using the OCA optical adhesive coating wear resistance testing device for display devices according to claim 9, characterized in that: The method comprises the following steps: S1: Install the optical film arc-shaped adhesion table (11) on the support rod (9) and fix it, and fix the OCA optical adhesive body (12) on the optical film arc-shaped adhesion table (11) to form a curved state for wear resistance testing; S2: The movable end of the electric push rod (5) pushes the elastic metal sheet (3) to form an arc surface with the same curvature as the optical film arc-shaped adhesion platform (11), the left round rod (22) contacts the OCA optical adhesive body (12), and the right round rod (22) contacts the arc surface of the elastic metal sheet (3); S3: The motor (28) drives the curved surface synchronous bonding component (13) to move up and down reciprocatingly. The air pressure in the sealed cavity (19) is constant, so that the two round rods (22) can move synchronously along the curved surface. The polishing sheet (40) on the left round rod (22) polishes the curved OCA optical adhesive body (12) reciprocatingly. S4: When the air pressure detection sensor (24) detects that the air pressure in the sealed cavity (19) changes, the pressing force on the OCA optical adhesive body (12) changes, and the pressure value increases. The air pressure detection sensor (24) transmits a signal to the external controller (34), and the controller (34) controls the micro air pump (31) and the pressure regulating tank (32) to inflate the sealed cavity (19). Conversely, when the pressure value decreases, the controller (34) controls the electronic pressure relief valve (33) to release the air, so that the pressing force on the surface of the OCA optical adhesive body (12) remains constant. S5: After reciprocating up and down friction for a period of time, the transmittance T, surface roughness RA and thickness H of the polished OCA optical adhesive body (12) are measured by a spectrophotometer, a contact surface profiler and a laser measuring instrument respectively, so as to evaluate its wear resistance.

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