Display module compression testing device

Abstract

The application relates to the technical field of display module testing, and discloses a display module compression resistance testing device which comprises a base and a gas supply component; a portal frame capable of moving along the length direction of the base is arranged on the base, and a testing module capable of moving horizontally is arranged on the portal frame; the testing module comprises a hollow plate, extrusion components and a driving component; the hollow plate is driven by the driving component to move up and down; the bottom of the hollow plate is connected with a plurality of array-arranged extrusion components; and the gas supply component is used for conveying gas into the hollow plate. The device adopts a pneumatic array extrusion structure, high-pressure gas is conveyed into the hollow plate through the gas supply component, the plurality of array-arranged extrusion components at the bottom are driven to move downward synchronously, the multi-point simultaneous extrusion test of the screen of the display module is realized, the on-off part is arranged on each extrusion component to control the gas inlet, the single-point, local or full-screen partition test mode can be flexibly switched, the bottom of the extrusion component is provided with a ball, the portal frame and the testing module are moved in cooperation, the rolling friction test of the screen is realized, and the actual working condition is fully simulated.

Description

Technical Field

[0001] This invention relates to the field of display module testing technology, and in particular to a display module pressure resistance testing device. Background Technology

[0002] As the core component of electronic display devices, display modules typically consist of multiple layers, including LCD panels, polarizers, backlight modules, driver ICs, and flexible circuit boards. During daily use, the screen inevitably suffers from external pressure such as squeezing and drop impacts. Furthermore, during the stacking, transportation, and assembly processes after production, display modules are continuously subjected to varying degrees of pressure. Therefore, it is necessary to conduct compression tests on the display module screens. This test can eliminate substandard display modules, preventing them from failing due to insufficient screen compressive strength during subsequent use. Accidental squeezing or sudden impacts could cause fractures and failures in brittle components such as the internal glass substrate, OLED thin-film encapsulation layer, and driver circuitry. By conducting compression tests on display modules, the stress scenarios in actual working conditions can be simulated in advance, serving as a means of failure prediction and quality screening.

[0003] A search revealed that Chinese patent CN218725207U discloses a display module compression performance testing fixture, comprising a display module testing fixture with a testing compression rod and a testing platform. Rotating rods are rotatably mounted on both sides of the fixture, and the same protective structure is fixedly mounted on each of the two rotating rods. Two limiting rods are symmetrically fixedly mounted on the top side of the testing platform, and two adjusting structures are slidably mounted on the side of the two limiting rods that are close to each other. Two connecting sliding plates are slidably mounted on each of the two adjusting structures, and positioning structures are movably mounted on each of the four connecting sliding plates. This solution mainly uses the compression rod to perform a compression test on the display module screen; however, the above solution still has shortcomings.

[0004] Currently, when testing the screen of a display module, a single-point pressure test is mainly performed on the screen using a pressure bar. Since pressure can only be applied to one test point at a time, the position of the pressure bar needs to be repeatedly adjusted during the test to cover different areas of the screen, resulting in low testing efficiency. Furthermore, single-point testing cannot simulate the simultaneous stress state that the screen may experience at multiple points in actual use, thus affecting the accuracy of the test.

[0005] To address the aforementioned issues, this application proposes a display module compression testing device. Summary of the Invention

[0006] This invention proposes a display module compression resistance testing device, which solves the problem that existing screen testing methods use a single-point compression method, which requires repeated adjustments to cover the entire screen, resulting in low efficiency and an inability to simulate the real working conditions of multiple points being subjected to force simultaneously in actual use, thus affecting the accuracy of the test.

[0007] The present invention provides a display module pressure resistance testing device, comprising a base and an air supply component;

[0008] The base is provided with a gantry that can move along its length, and a test module that can move laterally is installed on the gantry.

[0009] The test module includes a hollow plate, extrusion components, and a driving component. The hollow plate is driven to move up and down by the driving component. Multiple extrusion components are connected to the bottom of the hollow plate in an array. The gas supply component is used to deliver gas into the hollow plate to push the internal components of the extrusion components downward. An exhaust valve is connected to the side of the hollow plate.

[0010] As a further optimization of the present invention, the extrusion component includes a switching part, a fixed tube, and an elastic extrusion part. The switching part is connected to the bottom of the hollow plate and communicates with its interior. The bottom of the switching part is connected to the fixed tube, and the bottom of the fixed tube is connected to a fixed plate. The elastic extrusion part located inside the fixed tube is installed on the fixed plate. The switching part is used to control the amount of gas entering the fixed tube and pushing the elastic extrusion part downward.

[0011] As a further optimization of the present invention, the elastic compression part includes a test rod, a piston and a spring. The fixed plate has an insertion hole in the middle. The piston is slidably disposed in the fixed tube. The test rod is connected to the bottom of the piston and passes through the insertion hole. The spring is sleeved on the test rod, and the two ends of the spring are respectively connected to the fixed plate and the piston. The fixed plate has an air passage hole for the piston to slide smoothly.

[0012] As a further optimization of the present invention, a first pressure sensor is connected between the test rod and the piston.

[0013] As a further optimization of the present invention, the bottom of the test rod is provided with a rolling groove, and a ball bearing is rolled and installed in the rolling groove.

[0014] As a further optimization of the present invention, the on / off section includes a flow guide pipe, a control valve and a flow sensor. The flow guide pipe is connected to the bottom of the hollow plate, the control valve is connected to the bottom of the flow guide pipe, the fixed pipe is connected to the bottom of the control valve, and a flow sensor extending into the flow guide pipe is installed on the flow guide pipe.

[0015] As a further optimization of the present invention, the driving component is a cylinder, a transversely arranged electric slide rail is installed on the gantry, the cylinder is installed on the driving end of the electric slide rail, the hollow plate is connected to the driving end of the cylinder, and a second pressure sensor is connected between the hollow plate and the driving end of the cylinder.

[0016] As a further optimization of the present invention, the air supply component includes an air pump and an air supply pipe. The two ends of the air supply pipe are respectively connected to the air outlet of the air pump and the hollow plate, and the air supply pipe is used to deliver the gas pumped by the air pump to the hollow plate.

[0017] As a further optimization of the present invention, two electric guide rails are symmetrically installed on the base, and the gantry frame is installed on the two electric guide rails.

[0018] As a further optimization of the present invention, the surface of the base is provided with a slot for placing the display module.

[0019] The above-described technical solution of the present invention has the following beneficial technical effects:

[0020] 1. In use, the display module is placed on the base, and then the gantry moves along the length of the base. The test module moves laterally on the gantry, allowing it to move above the display module. High-pressure gas is then supplied to the hollow plate through the gas supply component. The gas entering the hollow plate can then enter multiple extrusion components arranged in an array at its bottom, pushing the components within these extrusion components downwards simultaneously. Subsequently, the hollow plate is driven downwards by the drive component, allowing the multiple extrusion components at the bottom of the hollow plate to simultaneously perform multi-point extrusion tests on the display module screen. After the test is completed, the gas inside the hollow plate can be discharged through the exhaust valve, and the components within the extrusion components return to their original positions. This design, by supplying high-pressure gas to the hollow plate through the gas supply component, allows the multiple extrusion components arranged in an array to simultaneously apply multi-point pressure to the display module screen. This solves the problem of repeatedly adjusting the position of the extrusion rods in traditional methods, improves testing efficiency, and can realistically simulate the working condition of the screen being subjected to multiple points of simultaneous extrusion in actual use, thereby improving the accuracy of the test results.

[0021] 2. To enable zoned testing of the display module screen, after gas enters the hollow plate, the flow control in the extrusion component can be used to determine whether the gas enters the corresponding fixed tube. The gas entering the fixed tube pushes the elastic extrusion component downwards. When testing the center of the display module screen, only the extrusion component located in the center of the bottom surface of the hollow plate needs to be exposed to gas, while the extrusion components around the perimeter do not. This allows for extrusion testing of the center of the display module screen. Similarly, when testing the perimeter of the display module screen, only the extrusion components located around the perimeter of the bottom surface of the hollow plate need to be exposed to gas, while the extrusion component in the center does not. This makes the testing more flexible and the accuracy of the detection higher. The above design allows for flexible selection of the pressure area according to testing needs, enabling switching between multiple testing modes such as single point, partial, or full screen. This achieves zoned testing of the display module screen, avoiding interference from full-point testing on the test results of specific areas, making the testing of the display module screen more targeted, and further improving the accuracy of the test.

[0022] 3. In actual use, display modules inevitably suffer from scratches. Therefore, during the testing of display modules, a rolling test can be performed on their surface. When gas enters the extrusion component, the elastic extrusion section in the fixed tube moves downward. A ball bearing is rolled at the bottom of the test rod in the elastic extrusion section. When the cylinder drives the hollow plate downward, the ball bearing at the bottom of the test rod in the extrusion component contacts the display module screen. The gantry can then move back and forth along the length of the base, causing the ball bearing to roll on the display module screen, thus achieving the rolling test. Furthermore, the test module can move laterally back and forth along the gantry, enabling a rolling test on the display module screen in another direction. The above design realizes the rolling friction test of the display module screen, thereby more comprehensively simulating the scratching scenario in actual use and improving the realism of the screen surface scratch resistance test. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a display module compression testing device proposed in this invention;

[0024] Figure 2 This is a schematic diagram of the back structure of a display module compression testing device proposed in this invention;

[0025] Figure 3 This is a schematic diagram of the test module in this invention;

[0026] Figure 4 This is a schematic diagram of the extrusion component in this invention;

[0027] Figure 5 This is a schematic diagram of the bottom structure of the extruded part in this invention;

[0028] Figure 6 This is a schematic diagram of the cooperation structure between the fixed tube and the elastic extrusion part in this invention;

[0029] Figure 7 For the present invention Figure 6 A magnified view of A in the middle.

[0030] Reference numerals: 1. Base; 101. Electric guide rail; 2. Gantry frame; 21. Electric slide rail; 3. Test module; 31. Hollow plate; 311. Exhaust valve; 32. Extrusion part; 321. On / off part; 3211. Guide pipe; 3212. Control valve; 3213. Flow sensor; 322. Fixing pipe; 3221. Fixing plate; 3222. Air passage hole; 323. Elastic extrusion part; 3231. Test rod; 3232. Piston; 3233. Spring; 3234. Ball bearing; 33. Cylinder; 4. Air supply part; 41. Air pump; 42. Air supply pipe. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0032] like Figure 1-7 As shown, the present invention proposes a display module pressure resistance testing device, which includes a base 1 and an air supply component 4;

[0033] A gantry 2 that can move along its length is provided on the base 1, and a test module 3 that can move laterally is installed on the gantry 2.

[0034] The test module 3 includes a hollow plate 31, an extrusion component 32 and a driving component. The hollow plate 31 is driven up and down by the driving component. Multiple extrusion components 32 are connected to the bottom of the hollow plate 31 in an array. The gas supply component 4 is used to deliver gas into the hollow plate 31 to push the internal components of the extrusion component 32 down. An exhaust valve 311 is connected to the side of the hollow plate 31.

[0035] During testing, the display module is placed on the base 1, and the gantry 2 moves along the length of the base 1. Simultaneously, the test module 3 moves laterally along the gantry 2, aligning the hollow plate 31 with the top of the display module screen. The gas supply component 4 delivers high-pressure gas into the hollow plate 31. After entering the hollow plate 31, the gas enters multiple extrusion components 32 arranged in an array at its bottom, pushing the components inside each extrusion component 32 downwards simultaneously. Then, the drive component drives the hollow plate 31 downwards as a whole, so that multiple extrusion components 32 apply multi-point pressure to the display module screen simultaneously, achieving multi-point synchronous extrusion testing. After the test is completed, the exhaust valve 311 is opened to discharge the gas from the hollow plate 31, and the components inside the extrusion components 32 return to their original positions. This design, by applying pressure simultaneously through multiple extrusion components 32 arranged in an array, avoids the problem of repeated position adjustments required in traditional single-point testing, improves testing efficiency, and can realistically simulate the working condition of the screen being subjected to multiple points of simultaneous extrusion in actual use, thus improving testing accuracy.

[0036] In this embodiment, the extrusion member 32 includes a switching part 321, a fixed tube 322, and an elastic extrusion part 323. The switching part 321 is connected to the bottom of the hollow plate 31 and communicates with its interior. The bottom of the switching part 321 is connected to the fixed tube 322, and the bottom of the fixed tube 322 is connected to the fixed plate 3221. The elastic extrusion part 323 located inside the fixed tube 322 is installed on the fixed plate 3221. The switching part 321 is used to control the amount of gas entering the fixed tube 322 and push the elastic extrusion part 323 downward.

[0037] To enable zoned testing of the display module screen, after gas enters the hollow plate 31, the on / off portion 321 in the extruder 32 controls whether the gas enters the corresponding fixed tube 322. Gas entering the fixed tube 322 pushes the elastic extruder 323 downwards. When testing the center of the display module screen, gas is only introduced into the extruder 32 located in the center of the bottom surface of the hollow plate 31, while gas is not introduced into the extruders 32 at the perimeter. This allows for extrusion testing of the center of the display module screen. During testing, gas is introduced into the extrusion components 32 located around the bottom surface of the hollow plate 31, while the extrusion component 32 located in the center is not exposed to gas. This allows for testing of the perimeter of the display module screen, making the testing more flexible and the accuracy of the detection higher. The above design allows for flexible selection of the pressure area according to testing needs, enabling switching between multiple testing modes such as single point, partial, or full screen. This allows for zoned testing of the display module screen, avoiding interference from full-point testing on the test results of specific areas. This makes the testing of the display module screen more targeted and further improves the accuracy of the testing.

[0038] In this embodiment, the elastic compression part 323 includes a test rod 3231, a piston 3232, and a spring 3233. The middle part of the fixed plate 3221 has an insertion hole. The piston 3232 is slidably disposed in the fixed tube 322. The test rod 3231 is connected to the bottom of the piston 3232 and passes through the insertion hole. The spring 3233 is sleeved on the test rod 3231, and the two ends of the spring 3233 are respectively connected to the fixed plate 3221 and the piston 3232. The fixed plate 3221 has an air passage 3222 for the piston 3232 to slide smoothly.

[0039] After the gas enters the fixed tube 322 through the on / off part 321, it can push the piston 3232 inside to slide downward. The downward movement of the piston 3232 compresses the spring 3233. The test rod 3231 moves with the piston 3232 and extends downward through the insertion hole in the middle of the fixed plate 3221. Then, the gas can be trapped in the fixed tube 322 through the on / off part 321, keeping the bottom end of the test rod 3231 in the position extending out of the fixed plate 3221. When the hollow plate 31 moves downward, the display module screen can be squeezed by the test rod 3231. When the gas pressure is removed, the elastic restoring force of the spring 3233 pushes the piston 3232 upward, and the test rod 3231 retracts and resets. The above structure facilitates the squeezing test of the display module screen.

[0040] It should be noted that the air passage 3222 on the fixed plate 3221 can keep the air pressure inside and outside the fixed tube 322 balanced, ensuring that the piston 3232 can slide smoothly.

[0041] In this embodiment, a first pressure sensor is connected between the test rod 3231 and the piston 3232;

[0042] During operation, the first pressure sensor collects the force between the test rod 3231 and the piston 3232 in real time. This force is equivalent to the actual pressure applied by the test rod 3231 to the display module screen. The first sensor transmits the pressure data to the control system in real time to provide feedback on the pressure at each test point. This avoids damage to the display module due to excessive pressure or invalidation of the test due to insufficient pressure, thus ensuring the accuracy of the test results.

[0043] In this embodiment, a groove is provided at the bottom of the test rod 3231, and a ball bearing 3234 is rolled inside the groove.

[0044] When the driving component moves the hollow plate 31 downward, the ball bearing 3234 at the bottom of the test rod 3231 comes into contact with the surface of the display module screen. At this time, the gantry 2 moves back and forth along the length of the base 1, and the ball bearing 3234 rolls on the surface of the display module screen to achieve rolling friction test in one direction. At the same time, the test module 3 can move laterally back and forth along the electric slide rail 21 on the gantry 2 to achieve rolling friction test in another direction. This design realizes the rolling friction test of the display module screen, more comprehensively simulates the scratching scenario in actual use, and effectively improves the authenticity of the screen surface scratch resistance test.

[0045] In this embodiment, the on / off section 321 includes a flow guide pipe 3211, a control valve 3212, and a flow sensor 3213. The flow guide pipe 3211 is connected to the bottom of the hollow plate 31, the control valve 3212 is connected to the bottom of the flow guide pipe 3211, and the fixing pipe 322 is connected to the bottom of the control valve 3212. The flow sensor 3213, which extends into the flow guide pipe 3211, is installed on the flow guide pipe 3211.

[0046] When gas enters the hollow plate 31, it first flows into the guide pipe 3211. The flow sensor 3213 monitors the gas flow rate in real time, providing data for zoned gas supply control. The operator or control system determines whether the gas continues to flow downward by opening and closing the control valve 3212 according to the test requirements. In areas where pressure is required, the control valve 3212 is opened, and the gas flows into the control valve 3212 through the guide pipe 3211, and then into the fixed pipe 322, pushing the elastic extrusion part 323 downward. In areas where pressure is not required, the control valve 3212 is closed, and the gas is cut off in the guide pipe 3211 and will not enter the corresponding fixed pipe 322. This design, through the coordinated operation of the guide pipe 3211, the control valve 3212, and the flow sensor 3213, realizes independent control of the gas path at each test point, and can flexibly switch between single-point, local, and full-screen test modes to meet diverse test needs.

[0047] In this embodiment, the driving component is a cylinder 33. A horizontally arranged electric slide rail 21 is installed on the gantry 2. The cylinder 33 is installed on the driving end of the electric slide rail 21. The hollow plate 31 is connected to the driving end of the cylinder 33, and a second pressure sensor is connected between the hollow plate 31 and the driving end of the cylinder 33.

[0048] The electric slide rail 21 drives the cylinder 33 to move the overall test module 3 laterally along the gantry 2, realizing the lateral adjustment of the test position. The cylinder 33 drives the hollow plate 31 to move up and down, providing overall downward pressure. The second pressure sensor monitors the pressure value applied by the cylinder 33 to the hollow plate 31 in real time, and works with the first pressure sensor to realize dual monitoring of total pressure and sub-point pressure.

[0049] In this embodiment, the air supply component 4 includes an air pump 41 and an air supply pipe 42. The two ends of the air supply pipe 42 are connected to the air outlet of the air pump 41 and the hollow plate 31, respectively. The air supply pipe 42 is used to deliver the gas pumped by the air pump 41 into the hollow plate 31.

[0050] During operation, the air pump 41 delivers high-pressure gas to the interior of the hollow plate 31 via the air supply pipe 42. After entering the hollow plate 31, the gas is distributed inside the hollow plate 31 and enters each extrusion component 32 through multiple guide pipes 3211 at the bottom of the hollow plate 31. After the test, the air pump 41 is turned off and the exhaust valve 311 is opened. The residual gas in the hollow plate 31 is quickly discharged through the exhaust valve 311. The components in each extrusion component 32 are reset under the restoring force of the spring 3233, preparing for the next test.

[0051] In this embodiment, two electric guide rails 101 are symmetrically installed on the base 1, and the gantry frame 2 is installed on the two electric guide rails 101.

[0052] During operation, the electric guide rail 101 drives the gantry 2 to move along the length of the base 1, thereby moving the test module 3 on the gantry 2 to above the display module, so that the compression and rolling tests can be performed through the test module 3.

[0053] In this embodiment, the surface of the base 1 is provided with a slot for placing the display module;

[0054] During testing, the display module is embedded in the slot of the base 1. The slot restricts the displacement of the display module to avoid displacement during testing and thus prevent pressure deviation, ensuring test accuracy.

[0055] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A display module compression resistance testing device, characterized in that, Includes a base (1) and an air supply component (4); The base (1) is provided with a gantry (2) that can move along its length, and the gantry (2) is equipped with a test module (3) that can move laterally. The test module (3) includes a hollow plate (31), an extruder (32) and a drive unit. The hollow plate (31) is driven up and down by the drive unit. The bottom of the hollow plate (31) is connected to a plurality of extruders (32) arranged in an array. The gas supply unit (4) is used to deliver gas into the hollow plate (31) and push the internal components of the extruder (32) to move down. The side of the hollow plate (31) is connected to an exhaust valve (311).

2. The display module compression testing device according to claim 1, characterized in that, The extrusion component (32) includes a switching part (321), a fixed tube (322), and an elastic extrusion part (323). The switching part (321) is connected to the bottom of the hollow plate (31) and communicates with its interior. The bottom of the switching part (321) is connected to the fixed tube (322), and the bottom of the fixed tube (322) is connected to the fixed plate (3221). The elastic extrusion part (323) located inside the fixed tube (322) is installed on the fixed plate (3221). The switching part (321) is used to control the gas entering the fixed tube (322) and push the elastic extrusion part (323) downward.

3. The display module compression testing device according to claim 2, characterized in that, The elastic compression part (323) includes a test rod (3231), a piston (3232) and a spring (3233). The fixed plate (3221) has an insertion hole in the middle. The piston (3232) is slidably disposed in the fixed tube (322). The test rod (3231) is connected to the bottom of the piston (3232) and passes through the insertion hole. The spring (3233) is sleeved on the test rod (3231), and the two ends of the spring (3233) are respectively connected to the fixed plate (3221) and the piston (3232). The fixed plate (3221) has an air passage (3222) for the piston (3232) to slide smoothly.

4. The display module compression testing device according to claim 3, characterized in that, A first pressure sensor is connected between the test rod (3231) and the piston (3232).

5. The display module compression testing device according to claim 3, characterized in that, The bottom of the test rod (3231) is provided with a rolling groove, and a ball bearing (3234) is rolled inside the rolling groove.

6. The display module compression testing device according to claim 2, characterized in that, The switching part (321) includes a flow guide pipe (3211), a control valve (3212) and a flow sensor (3213). The flow guide pipe (3211) is connected to the bottom of the hollow plate (31). The control valve (3212) is connected to the bottom of the flow guide pipe (3211). The fixed pipe (322) is connected to the bottom of the control valve (3212). The flow sensor (3213) is installed on the flow guide pipe (3211) and extends into it.

7. The display module compression testing device according to claim 2, characterized in that, The driving component is a cylinder (33). A horizontally arranged electric slide rail (21) is installed on the gantry (2). The cylinder (33) is installed on the driving end of the electric slide rail (21). The hollow plate (31) is connected to the driving end of the cylinder (33), and a second pressure sensor is connected between the hollow plate (31) and the driving end of the cylinder (33).

8. The display module compression testing device according to claim 1, characterized in that, The gas supply component (4) includes an air pump (41) and an air supply pipe (42). The two ends of the air supply pipe (42) are connected to the air outlet of the air pump (41) and the hollow plate (31) respectively. The air supply pipe (42) is used to deliver the gas pumped by the air pump (41) into the hollow plate (31).

9. A display module compression testing device according to claim 1, characterized in that, Two electric guide rails (101) are symmetrically installed on the base (1), and the gantry frame (2) is installed on the two electric guide rails (101).

10. A display module compression testing device according to claim 1, characterized in that, The surface of the base (1) is provided with a slot for placing the display module.

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