A bending machine for OLED screen testing

Abstract

The present invention provides an OLED screen test bending machine, including a cabinet, a bending mechanism and a pressure sensor, the cabinet is provided with a bending mechanism and a pressure sensor, the bending mechanism includes a ballast platform, a placement platform and a moving device, ballast platforms are provided on both sides of the placement platform, the moving device includes a plurality of moving components, namely a lateral moving component and a longitudinal moving component, the ballast platform is connected with the lateral moving component to realize the left and right movement of the ballast platform, the placement platform is connected with the longitudinal moving component to realize the up and down movement of the placement platform, the pressure sensor is located below the placement platform, and is used to test the pressure when the OLED screen is bent. The present invention provides an OLED screen test bending machine, which has strong versatility and can realize bending on both sides, has higher bending experiment efficiency, more stable and objective experimental results, and is compatible with a large span of OLED screen sizes.

Description

Technical Field

[0001] The present invention relates to the technical field of OLED screen testing, and in particular to a bending machine for OLED screen testing. Background Art

[0002] OLED flexible screen is the latest technology, which is currently popular. It is not only low-power and high-display effect, but also more revolutionary in flexibility, which changes the fundamental view of human beings on display screens. It is no longer a flat display, but can be bent, which is a qualitative improvement over traditional flat displays. However, the curvature radius, the bending time, the bending angle, etc., are still the pain points that limit the commercial use of flexible screens, especially in mobile phones. For this type of technology, it is basically blank.

[0003] Therefore, it is necessary to develop a device that can feedback the tolerable bending curvature, holding time, bending radius and other data after the screen is bent, so as to help OLED flexible screens enter commercial mobile phones faster. Currently, the only OLED screen test bending machine is the folding screen test device recently released by Samsung. Although it can test OLED flexible screens, its device is a whole machine bending test and can only test the 180-degree bending life of the OLED flexible screen. The test range is very limited and the versatility is not strong. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a bending machine for OLED screen testing, which has strong versatility and can achieve bending on both sides, has higher bending test efficiency, more stable and objective experimental results, and is compatible with a large range of OLED screen sizes.

[0005] To achieve the above-mentioned purpose, the present invention proposes a bending machine for OLED screen testing, comprising a cabinet, a bending mechanism and a pressure sensor, wherein the cabinet is provided with a bending mechanism and a pressure sensor, the bending mechanism comprises a ballast platform, a placing platform and a moving device, ballast platforms are provided on both sides of the placing platform, the moving device comprises a plurality of moving components, namely a lateral moving component and a longitudinal moving component, the ballast platform is connected to the lateral moving component to realize the left and right movement of the ballast platform, the placing platform is connected to the longitudinal moving component to realize the up and down movement of the placing platform, and the pressure sensor is located below the placing platform, and is used to test the pressure when the OLED screen is bent.

[0006] The innovations of this technology are mainly reflected in the following aspects: it changes the traditional shortcomings of only being able to test a single bending angle and having poor versatility. This technical solution takes into account that the limiting factor for the future development of OLED flexible screens is the lack of understanding of their service life after multi-angle bending, which limits the further development of OLED flexible screens. Therefore, a mobile device is set up, and through the coordination and cooperation between the ballast table, the placement platform, the pressure sensor and the mobile device, the ballast table can be moved left and right, and the placement platform can be moved up and down. The two sides of the OLED flexible screen can be bent and tested at multiple angles continuously, and bending tests at multiple angles and in multiple locations can be performed simultaneously, with good test results, stable tests, and high test efficiency. At the same time, the setting of the ballast table and the placement table can use a carrying film to cover both sides of the OLED screen, and then bend it under force without damaging the OLED screen, and there is no need to affect the product due to clamping, nor is it limited to the bending point of the screen, and the size test range is also improved, with strong versatility.

[0007] Preferably, the placing platform includes a boss and an adjusting device, the adjusting device includes a spring and a positioning block, the boss is connected to the positioning block through a spring, and can move up and down along the edge of the positioning block, the boss includes a fixed boss and a guide boss, guide bosses are provided on both sides of the fixed boss, a smooth curved surface is provided on the guide boss, and the fixed boss is connected to the spring to achieve up and down movement.

[0008] The innovation of this technical solution is that: since the present invention can bend the OLED flexible screen at multiple angles, when the ballast platform and the placement platform move, in order to improve the test accuracy, the OLED flexible screen needs to be kept taut at all times, but there is a probability of damaging the product, so a spring and a positioning block are arranged under the placement platform, so that the placement platform can move up and down to a certain extent, which is convenient for fine adjustment of its own height during testing, keeping the screen taut and avoiding damaging the product; at the same time, the setting of the guide boss has a guiding effect on the bending and forming of the OLED flexible screen, which is more conducive to bending and forming.

[0009] Preferably, the fixed boss is in an inverted "concave" shape, connecting grooves are provided on both sides of the upper end of the fixed boss, the guide boss is connected to the connecting grooves, and a movable groove is provided at the lower end of the fixed boss, and the movable groove can move up and down along the edge of the positioning block. The fixed boss arranged in an inverted "concave" shape has a simple structure, is conveniently and stably connected to the guide boss, is conducive to guiding, and is also convenient for the fixed boss to stably move up and down on the edge of the positioning block.

[0010] Preferably, the ballast platform is also provided with a fixing device, which includes a pressure plate and a guide rod. The ballast platform is connected to the lateral moving component to achieve left and right movement. The ballast platform is provided with a guide rod. The pressure plate passes through the guide rod and is located on the ballast platform, which is used to position the OLED screen. When the OLED screen is subjected to a bending test, it must be positioned first. In order to better protect the OLED screen from damage, a fixing device with a simple structure and easy control needs to be set. By setting a pressure plate and a guide rod, after the OLED screen is placed, it only needs to be gently placed on the ballast platform along the direction of the guide rod to position the OLED screen. The structure is simple and the controllability is strong.

[0011] Preferably, the moving assembly includes a servo motor, a screw and a moving support seat, the moving support seat is connected to the servo motor via a screw to achieve left and right movement, the ballast platform is connected to the moving support seat of the lateral moving assembly, the lower end of the placement platform is connected to a pressure sensor, and the pressure sensor is connected to the moving support seat of the longitudinal moving assembly to achieve up and down movement of the placement platform. Compared with ordinary motors, this solution uses a servo motor to control the movement of each component, which has high precision and reproducibility, and the experimental parameters are more reference-oriented. Combined with a pressure sensor, the trajectory of the servo motor is feedback-controlled according to the change in pressure, the tension of the OLED flexible screen is more stable, and the life test is more accurate.

[0012] Preferably, a guide device is further included, the guide device comprising a fixed column, a guide rail and a slider, the fixed column is provided with a guide rail, the guide rail is provided with a slider, and the two sides of the placement platform are connected to the slider through a connecting block to achieve up and down movement. In order to improve the stability of the placement platform moving up and down, a guide device is provided, and while the longitudinal moving device drives the placement platform to move up and down, the guide device guides the movement of the placement platform to improve the accuracy during the test.

[0013] Preferably, the device further comprises a reinforcing rib, the reinforcing rib is located on the side of the fixing column, the cross section of the reinforcing rib is triangular, a plurality of mounting holes are provided on the reinforcing rib, and the reinforcing rib is connected to the base through the mounting holes. The reinforcing rib is provided to improve the strength of the fixing column installation and the guiding stability.

[0014] The beneficial effects of the present invention are as follows: the present invention can perform bending life tests on OLED screens on both sides simultaneously and at multiple angles, the bending test efficiency is higher, the experimental results are more stable and objective, there are fewer interference factors from the outside world, the equipment is stable, the displacement accuracy is high, the input-output ratio is high, and it has strong versatility and is compatible with a large span of OLED screen sizes, and is compatible with 4"~20" OLED screens for bending tests; at the same time, the screen can be kept taut at all times, and the product can be avoided from being damaged, which is more conducive to bending and forming.

[0015] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the explosion structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the explosion structure on which the carrier is placed.

[0019] In the figure: 1-cabinet, 2-bending mechanism, 3-pressure sensor, 21-ballast platform, 22-placing platform, 23-moving component, 211-pressing plate, 212-guide rod, 221-boss, 222-spring, 223-positioning block, 224-fixed column, 225-guide rail, 226-slider, 227-connecting block, 228-reinforcement rib, 229-photoelectric switch, 231-servo motor, 232-screw rod, 233-movable support seat, 2211-fixed boss, 2212-guide boss, 2213-connecting groove, 2214-movable groove. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0021] like Figures 1 to 3 As shown, this embodiment proposes a bending machine for OLED screen testing, including a cabinet 1, a bending mechanism 2 and a pressure sensor 3. The cabinet 1 is provided with a bending mechanism 2 and a pressure sensor 3. The bending mechanism 2 includes a ballast platform 21, a placement platform 22 and a moving device. The moving device includes a plurality of moving components 23. The moving component 23 includes a servo motor 231, a screw rod 232 and a moving support seat 233. The moving support seat 233 is connected to the servo motor 231 through the screw rod 232 to achieve left and right movement. The moving components 23 are respectively a lateral moving component 23 and a longitudinal moving component 23.

[0022] Ballast platforms 21 are arranged on both sides of the carrier 22 for ballast positioning at both ends of the OLED flexible screen. A fixing device is arranged on the ballast platform 21, and the fixing device includes a pressure plate 211 and a guide rod 212. The movable support seat 233 of the lateral moving component 23 is connected to the ballast platform 21 to realize left and right movement. A guide rod 212 is arranged on the ballast platform 21. The pressure plate 211 includes a pressure plate 1 and a pressure plate 2. The pressure plate 1 and the pressure plate 2 pass through the guide rod 212 respectively and are located on the ballast platform 21 for ballast positioning of the OLED screen.

[0023] The placement platform 22 is used to place the OLED flexible screen and perform a bending test on it. A pressure sensor 3 is set under the placement platform 22. The pressure sensor 3 is connected to the movable support seat 233 of the longitudinal moving component 23 to realize the up and down movement of the placement platform 22 and test the pressure of the OLED screen when it is bent.

[0024] As a preferred implementation scheme, the placement platform 22 includes a boss 221 and an adjusting device. The OLED screen is placed on the boss 221 during the bending test. The adjusting device includes a spring 222 and a positioning block 223. The boss 221 is connected to the positioning block 223 through the spring 222 and can move up and down along the edge of the positioning block 223, wherein the boss 221 includes a fixed boss 2211 and a guide boss 2212. The fixed boss 2211 is an inverted "concave" shape, and connecting grooves 2213 are provided on both sides of the upper end of the fixed boss 2211. The guide boss 2212 is connected to the connecting groove 2213. A smooth curved surface is provided on the guide boss 2212 to facilitate guiding the OLED screen. A movable groove 2214 is provided at the lower end of the fixed boss 2211. The movable groove 2214 is connected to the spring 222 and moves up and down along the edge of the positioning block 223. The height of the boss 221 is finely adjusted to keep the screen tight and avoid damaging the product, which is more conducive to bending and forming.

[0025] As a preferred implementation scheme, guiding devices are arranged on both sides of the placement platform 22, and the guiding devices include a fixed column 224, a guide rail 225 and a slider 226. The fixed column 224 is provided with a guide rail 225, and the guide rail 225 is provided with a slider 226. The two sides of the boss 221 are connected to the slider 226 through a connecting block 227, so as to guide the up and down movement of the placement platform 22 and improve the accuracy during the test. A reinforcing rib 228 is arranged on one side of the fixed column 224, and the cross-section of the reinforcing rib 228 is triangular. The reinforcing rib 228 is provided with a plurality of mounting holes, and the reinforcing rib 228 is connected to the base through the mounting holes, so as to improve the installation strength of the fixed column 224 and improve the guiding stability. A photoelectric switch 229 is also arranged on the fixed column 224, which is used to cooperate with the servo motor 231 and the control device to realize the orderly movement of each moving component 23.

[0026] During operation, first, both sides of the OLED flexible screen are covered with a carrier film, and the two ends are placed on the ballast platforms 21 on both sides respectively, and positioned by the pressure plate 211, and the middle part is placed on the placement platform, and then the servo motors 231 and photoelectric switches of each moving component 23 are turned on, and the lateral moving components 23 on both sides move synchronously to the opposite side, and the longitudinal moving device moves upward, while keeping the OLED screen in a tensioned state at all times. When the three groups of moving components 23 move to the set position, for example, the bending angle of the OLED screen is 90 degrees, the three groups of moving devices pause for 10 seconds, and the pressure sensor 3 tests the pressure of this bending angle. After one test is completed, the three groups of moving components 23 retreat to the origin, and then repeat the above movement several times. After all tests are completed, the servo motors 231 and photoelectric switches of each moving component 23 are turned off, the pressure plate 211 is opened, and the OLED flexible screen covered with the carrier film is taken out.

[0027] The driving power supply voltage in the present invention is 220V, the OLED screen is fixed on the ballast platform 21 and moves left and right by a distance of 0-40mm, the OLED screen is placed on the placement platform 22 at an upper height of 35mm, the minimum bending angle is 0 degrees, and the maximum angle is 135 degrees.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An OLED screen testing bending machine, characterized by: It includes a cabinet, a bending mechanism and a pressure sensor. The cabinet is provided with a bending mechanism and a pressure sensor. The bending mechanism includes a ballast platform, a placement platform and a moving device. Ballast platforms are provided on both sides of the placement platform. The moving device includes a plurality of moving components, which are a transverse moving component and a longitudinal moving component. The ballast platform is connected with the transverse moving component to realize the left and right movement of the ballast platform. The placement platform is connected with the longitudinal moving component to realize the up and down movement of the placement platform. The pressure sensor is located below the placement platform and is used to test the pressure of the OLED screen when it is bent. The placing platform includes a boss and an adjusting device, the adjusting device includes a spring and a positioning block, the boss is connected to the positioning block through the spring, and can move up and down along the edge of the positioning block, the boss includes a fixed boss and a guide boss, the two sides of the fixed boss are provided with guide bosses, the guide boss is provided with a smooth curved surface, the fixed boss is connected to the spring to achieve up and down movement; The ballast platform is also provided with a fixing device, which includes a pressing plate and a guide rod. The ballast platform is connected with the lateral moving assembly to achieve left and right movement. The ballast platform is provided with a guide rod. The pressing plate passes through the guide rod and is located on the ballast platform, which is used for ballast positioning of the OLED screen. The moving assembly includes a servo motor, a screw and a moving support seat. The moving support seat is connected to the servo motor via a screw to achieve left and right movement. The ballast platform is connected to the moving support seat of the lateral moving assembly. The lower end of the placement platform is connected to a pressure sensor, and the pressure sensor is connected to the moving support seat of the longitudinal moving assembly to achieve up and down movement of the placement platform.

2. The OLED screen testing bending machine according to claim 1, characterized in that: The fixed boss is in an inverted "concave" shape, and connecting grooves are provided on both sides of the upper end of the fixed boss. The guide boss is connected to the connecting grooves. A movable groove is provided at the lower end of the fixed boss, and the movable groove can move up and down along the edge of the positioning block.

3. The OLED screen testing bending machine according to claim 1, characterized in that: It also includes a guiding device, which includes a fixed column, a guide rail and a slider. The fixed column is provided with a guide rail, and the guide rail is provided with a slider. The two sides of the placement platform are connected to the slider through connecting blocks to achieve up and down movement.

4. The OLED screen testing bending machine as claimed in claim 3, characterized in that: It also includes reinforcing ribs, which are located on the sides of the fixing columns. The cross-section of the reinforcing ribs is triangular, and a plurality of mounting holes are provided on the reinforcing ribs. The reinforcing ribs are connected to the base through the mounting holes.

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