An optical testing structure for an in-cell screen backlight display module

Abstract

This utility model discloses an optical testing structure for an in-cell screen backlight display module, specifically relating to the field of optical testing equipment technology. It includes a worktable, a disassembly plate, and test columns. A pressure plate is located below the fixed plate, and the disassembly plate is installed at the bottom of the pressure plate. Each set of test columns has a rubber head embedded at its bottom. By designing a matrix of test columns and rubber heads, it can simulate pressing scenarios in actual use. The array of protrusions pressing down on the screen can simulate mechanical stress scenarios such as touch pressing, drop impact, or external compression during daily use, detecting the screen's tolerance under different pressures. Optical changes in the pressure area of ​​the backlight module can be directly observed. The separate design of the rubber heads and test columns allows for individual replacement of worn parts, eliminating the need to scrap the entire test column and reducing consumable costs. Furthermore, rubber heads of different hardness can be replaced according to testing needs to simulate the impact of different materials on the screen.

Description

Technical Field

[0001] This utility model relates to the field of optical testing equipment technology, and more specifically, to an optical testing structure for an incell screen backlight display module. Background Technology

[0002] In the test of the compressive strength of the back of a flexible display screen, a point pressure test is usually performed on the display screen before the individual display screens are assembled to simulate the continuous compressive force exerted on the display screen by the back structure of the display screen in the whole state. The display screen is qualified by judging whether there is a visible indentation (also known as a top mark) on the front of the display screen.

[0003] Existing patent publication number CN218916777U discloses a display screen testing system. The display screen testing system includes a support platform, a pressing device, an optical sensor, and a processing device. The support platform has a top surface for supporting the display screen, and the support platform has a receiving space at least in the middle. The pressing device can move above the support platform to apply pressure to the display screen located on the support platform. The optical sensor is located within the receiving space and is used to acquire optical data of the display screen during testing. The processing device is used to determine whether the display screen has an indentation based on the optical data. This display screen testing system, by setting the optical sensor in the middle of the support platform, can acquire the optical data of the display screen in real time, and the processing device can determine whether the display screen has an indentation based on the optical data, which helps to improve the accuracy of indentation judgment, thereby improving the accuracy of the display screen's back-side compression resistance test. The inventors discovered the following problems with the existing technology during the development of this utility model:

[0004] Existing testing structures face diverse mechanical stress scenarios in terminal products when using In-cell screens. User touch and gesture operations will generate local or multi-point pressure on the screen. When the screen is dropped, or when it is squeezed by a backpack or squeezed in a vehicle, it will generate impacts across the entire screen. This makes it impossible to simulate the optical changes under the coordinated force of multiple areas, resulting in limited testing and an inability to reflect the overall screen durability.

[0005] Therefore, an optical testing structure for in-cell screen backlight display modules is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides an optical testing structure for an incell screen backlight display module to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an optical testing structure for an incell screen backlight display module, including a workbench, a disassembly plate and a testing column, a gantry frame is provided above the workbench, hydraulic cylinders are installed on both sides of the upper end of the gantry frame, a fixing plate is installed on the telescopic ends of the two sets of hydraulic cylinders, and a pressure plate is provided below the fixing plate.

[0008] The disassembly plate is installed at the bottom of the lower pressure plate, and the test column is fixedly connected to the bottom end face of the disassembly plate. Several sets of test columns are provided, and a rubber head is embedded at the bottom of each set of test columns. Fixing seats are welded to both sides of the upper end of the workbench, and clamping plates are provided on one side of the opposite face of the two sets of fixing seats.

[0009] Preferably, limit frames are welded to both sides of the front and rear ends of the lower pressure plate, and connecting ears are welded to both sides of the front and rear ends of the assembly plate.

[0010] Preferably, the four sets of limiting frames correspond to the four sets of connecting ears, and the limiting frames are all connected to the connecting ears by bolts.

[0011] Preferably, the test columns are distributed in a matrix on the bottom surface of the disassembly plate, and the rubber head is shaped like a bullet.

[0012] Preferably, spring telescopic rods are fixedly connected to the four corners of the opposite surfaces of the lower pressure plate and the disassembly plate, and the lower pressure plate and the disassembly plate are of the same shape and size.

[0013] Preferably, each of the two sets of fixing seats is equipped with an electric push rod at both ends on the side away from the clamping plate, and the telescopic end of each pair of electric push rods is connected to one of the clamping plates.

[0014] Preferably, every two sets of electric push rods drive the clamping plate to extend and retract along the surface of the worktable, and the two sets of clamping plates are symmetrically arranged.

[0015] Preferably, the inner cavity at the bottom of the test column is provided with a hole for inserting the rubber head, and the test column is cylindrical in shape.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] 1. Compared with existing technologies, the optical testing structure of this incell screen backlight display module can simulate the pressing scenario in actual use by designing matrix-style test columns and rubber heads. The array of protrusions pressing down on the screen can simulate mechanical stress scenarios such as touch pressing, drop impact or external squeezing in daily use, detect the screen's tolerance under different pressures, and directly observe the optical changes in the pressure area of ​​the backlight module.

[0018] 2. Compared with existing technologies, the optical testing structure of this incell screen backlight display module adopts a separate design of rubber head and test column, which allows worn parts to be replaced individually without scrapping the entire test column, reducing consumable costs. At the same time, rubber heads of different hardness can be replaced according to test requirements to simulate the impact of different materials on the screen. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0020] Figure 2 This is a three-dimensional structural diagram of the cross-section of the lower pressure plate of this utility model.

[0021] Figure 3 This utility model Figure 1 A magnified schematic diagram of the structure at point A in the diagram.

[0022] Figure 4 This is a schematic diagram of the rubber head structure of this utility model from a bottom view.

[0023] The attached diagram is labeled as follows: 1. Workbench; 2. Gantry frame; 3. Hydraulic cylinder; 4. Fixing plate; 5. Spring telescopic rod; 6. Lower pressure plate; 61. Limiting frame; 7. Disassembly plate; 71. Connecting ear; 8. Test column; 9. Rubber head; 10. Fixing base; 11. Electric push rod; 12. Clamping plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0025] As attached Figures 1 to 4 The optical testing structure of an incell screen backlight display module shown includes a workbench 1, a disassembly plate 7, and a test column 8. A gantry 2 is set above the workbench 1, which provides a rigid support platform for the entire testing system. Hydraulic cylinders 3 are installed on both sides of the upper end of the gantry 2, forming a stable frame. The two sets of hydraulic cylinders 3 are precisely adjusted by the hydraulic system to simulate mechanical stress of different forces. Fixed plates 4 are installed at the telescopic ends of the two sets of hydraulic cylinders 3. The fixed plates 4 are connected to the telescopic ends of the hydraulic cylinders 3, which evenly transmit hydraulic power to the lower pressure plate 6. The lower pressure plate 6 is set below the fixed plate 4. The lower pressure plate 6 makes the pressure distribution more uniform by contacting the disassembly plate 7 with a large area.

[0026] The disassembly plate 7 is installed at the bottom of the lower pressure plate 6. The disassembly plate 7 can be disassembled as the mounting carrier for the test column 8. The test column 8 is fixedly connected to the bottom end face of the disassembly plate 7. Several sets of test columns 8 are provided. Each set of test columns 8 has a rubber head 9 embedded at the bottom. The test column 8, together with the rubber head 9, can apply pressure to multiple areas of the screen at the same time to simulate multi-touch and multi-point impact during drop, making it convenient for users to observe global optical defects under complex stress. Fixed seats 10 are welded on both sides of the upper end of the worktable 1. The fixed seats 10 serve as the mounting carrier for the electric push rod 11. Clamping plates 12 are provided on one side of the opposite face of the two sets of fixed seats 10. The clamping plates 12 clamp the screen for limiting. Example 2

[0027] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details:

[0028] In a preferred embodiment, limit frames 61 are welded to both sides of the front and rear ends of the lower pressure plate 6, and connecting ears 71 are welded to both sides of the front and rear ends of the disassembly plate 7. The four sets of limit frames 61 correspond to the four sets of connecting ears 71 respectively. The limit frames 61 are all connected to the connecting ears 71 by bolts. The lower pressure plate 6 and the disassembly plate 7 are of the same shape and size. The limit frames 61 and the connecting ears 71 are fixed by bolts, so that the lower pressure plate 6 and the disassembly plate 7 form a modular disassembly structure, which allows for quick disassembly and maintenance of the disassembly plate 7. The test columns 8 are distributed in a matrix on the disassembly plate 7. The bottom surface of the test column 8 has a bullet-shaped rubber head 9. The test column 8 is arranged in a matrix to cooperate with the rubber head 9, which can evenly cover the screen surface to simulate multi-touch by the user, multi-angle impact during drop, or uniform external pressure. The four corners of the opposite sides of the pressure plate 6 and the disassembly plate 7 are fixedly connected with spring telescopic rods 5. The spring telescopic rods 5 provide elastic buffer during the downward pressure to avoid the hydraulic cylinder 3 directly applying hard pressure, which would cause the screen to be damaged by instantaneous overload. The inner cavity at the bottom of the test column 8 is provided with a cavity for the rubber head 9 to be inserted. The test column 8 is cylindrical in shape.

[0029] In a preferred embodiment, electric push rods 11 are installed at both ends of the two sets of fixed seats 10 on the side away from the clamping plate 12. The fixed seats 10 are welded to both sides of the workbench 1, providing a rigid mounting carrier for the electric push rods 11 and the clamping plate 12, ensuring that the entire clamping mechanism remains stable during the test. The telescopic ends of each pair of electric push rods 11 are connected to one of the clamping plates 12. Each pair of electric push rods 11 drives the clamping plate 12 to telescopically move along the surface of the workbench 1. The two sets of clamping plates 12 are symmetrically arranged. The telescopic amount of the two sets of electric push rods 11 is controlled by electrical signals, which can precisely adjust the moving distance and clamping force of the clamping plate 12 to meet the clamping requirements of different sizes.

[0030] The working process of this utility model is as follows: First, before starting the work, the Incell screen backlight display module to be tested is placed on the surface of the workbench 1, between two sets of clamping plates 12. The fixing base 10 is welded to both sides of the workbench 1, providing a rigid mounting carrier for the electric push rod 11. The control system sends an electrical signal to the electric push rod 11, driving the clamping plates 12 on both sides to perform symmetrical telescopic movements along the surface of the workbench 1. The clamping distance is adjusted according to the screen size. After the clamping plates 12 contact the edge of the screen, the electric push rod 11 continuously applies a preset clamping force.

[0031] Once the screen is fixed, the control system activates hydraulic cylinder 3. Both hydraulic cylinders 3 extend and retract synchronously downwards, transmitting hydraulic power to the lower pressure plate 6 via the fixing plate 4, causing the entire lowering assembly to descend vertically. At this time, the spring telescopic rod 5 gradually compresses as the lower pressure plate 6 presses down, converting rigid pressure into flexible buffering force to prevent overload from the impact force when the test column 8 contacts the screen instantaneously. As the lower pressure plate 6 continues to descend, the rubber heads 9 at the bottom of the test column 8 sequentially contact the screen surface, forming a matrix pressure distribution. The spring-like structure of the rubber heads 9 concentrates pressure at the tip and diffuses it evenly in all directions, simulating the stress scenario of fingertip pressing or drop impact. Hydraulic cylinder 3 precisely controls the downward stroke and pressure value through the hydraulic system, enabling the application of different levels of mechanical stress. After the test, hydraulic cylinder 3 extends and retracts in the opposite direction, rising back to its original position, and the spring telescopic rod 5 returns to its natural state. If it is necessary to replace the test scheme or maintain components, the bolts of the limit bracket 61 and connecting ear 71 can be removed to quickly separate the disassembly plate 7 for maintenance or adjustment of the test column 8 or rubber heads 9. The above describes the working principle of this optical test structure for an incell screen backlight display module.

Claims

1. An optical testing structure for an in-cell screen backlight display module, comprising a worktable (1), a disassembly / assembly plate (7), and a testing column (8), characterized in that: A gantry frame (2) is provided above the workbench (1). Hydraulic cylinders (3) are installed on both sides of the upper end of the gantry frame (2). Fixed plates (4) are installed on the telescopic ends of the two sets of hydraulic cylinders (3). A pressure plate (6) is provided below the fixed plate (4). The disassembly plate (7) is installed at the bottom of the lower pressure plate (6). The test column (8) is fixedly connected to the bottom end face of the disassembly plate (7). The test column (8) is provided in several groups. Each group of the test column (8) is provided with a rubber head (9) embedded at the bottom. The upper end of the workbench (1) is provided with a fixed seat (10) on both sides. The two fixed seats (10) are provided with a clamping plate (12) on one side of the opposite side.

2. The optical testing structure for an in-cell screen backlight display module according to claim 1, characterized in that: Limiting brackets (61) are welded to both sides of the front and rear ends of the lower pressure plate (6), and connecting ears (71) are welded to both sides of the front and rear ends of the disassembly plate (7).

3. The optical testing structure for an in-cell screen backlight display module according to claim 2, characterized in that: The four sets of limiting frames (61) correspond to the four sets of connecting ears (71) respectively, and the limiting frames (61) are all connected to the connecting ears (71) by bolts.

4. The optical testing structure for an in-cell screen backlight display module according to claim 1, characterized in that: The test columns (8) are distributed in a matrix on the bottom surface of the disassembly plate (7), and the rubber head (9) is shaped like a bullet.

5. The optical testing structure for an in-cell screen backlight display module according to claim 2, characterized in that: Spring telescopic rods (5) are fixedly connected to the four corners of the opposite side of the lower pressure plate (6) and the disassembly plate (7). The lower pressure plate (6) and the disassembly plate (7) are of the same shape and size.

6. The optical testing structure for an in-cell screen backlight display module according to claim 1, characterized in that: Both ends of the two sets of fixed seats (10) away from the clamping plate (12) are equipped with electric push rods (11), and the telescopic ends of each pair of electric push rods (11) are connected to one of the clamping plates (12).

7. The optical testing structure for an in-cell screen backlight display module according to claim 6, characterized in that: Two sets of electric push rods (11) drive the clamping plate (12) to extend and retract along the surface of the worktable (1), and the two sets of clamping plates (12) are symmetrically arranged.

8. The optical testing structure for an in-cell screen backlight display module according to claim 4, characterized in that: The inner cavity at the bottom of the test column (8) is provided with a hole for the rubber head (9) to be inserted, and the test column (8) is cylindrical in shape.

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