A pressure inspection device for liquid crystal display

Abstract

This utility model discloses a pressure resistance testing device for liquid crystal displays. A support beam is installed at the lower part of a frame-like testing frame, and vacuum suction cups are mounted on the support beam. A carrier plate is installed on the testing frame above the support beam. Each carrier plate has a lower pressure sensor, and through holes are provided on the carrier plate corresponding to each vacuum suction cup. Pressure driving components are installed at the top of the testing frame via the support plate, with the lower end of each pressure driving component extending through the support plate to its lower end. An upper pressure sensor is installed at the lower end of each pressure driving component. The lower pressure sensors, upper pressure sensors, and pressure driving components are electrically connected to a control device. This utility model can quickly clamp and fix liquid crystal displays for pressure resistance testing, and requires less operator skill. It effectively replaces manual operation, reduces labor intensity, and solves the problem of inaccurate test results due to uncontrollable manual testing force and frequency, significantly improving testing accuracy and efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of liquid crystal display manufacturing technology, and in particular relates to a pressure resistance testing device for liquid crystal displays. Background Technology

[0002] The existing LCD screen testing devices on the market require the LCD screen to be fixed on the testing device first. Then, the operator manually controls the application of testing pressure and the duration of pressure application based on experience. This not only greatly increases the labor intensity of the operator, but also makes it difficult to control the manual testing force and frequency, which can easily lead to inaccurate test results. This also reduces the efficiency of the equipment in testing LCD screens.

[0003] Therefore, developing a new type of testing equipment that is easy to use and operate is the key to solving the problem. Utility Model Content

[0004] The present invention provides a pressure resistance testing device for liquid crystal displays.

[0005] This utility model is achieved through the following technical solution: it includes a detection frame and a touch pressure detection mechanism disposed on the detection frame. The detection frame is configured as a frame structure, with several support beams disposed at the lower part of the detection frame. Vacuum suction cups are disposed on each support beam. A carrier plate is disposed on the detection frame above the support beams. Each carrier plate is provided with a lower touch pressure sensor, and a through hole is provided on the carrier plate corresponding to each vacuum suction cup. The touch pressure detection mechanism is disposed on the top of the detection frame through the support plate. The touch pressure detection mechanism includes a touch pressure driving component, a touch pressure rod, and an upper touch pressure sensor. The touch pressure driving components are all disposed on the support plate, and the lower end of the touch pressure driving component extends through the support plate to its lower end. A touch pressure rod is disposed at the lower end of each touch pressure driving component, and an upper touch pressure sensor is disposed at the lower end of each touch pressure rod. The lower touch pressure sensor, the upper touch pressure sensor, and the touch pressure driving component are electrically connected to a control device.

[0006] The beneficial effects of this utility model are: This utility model has a compact structure and is easy to use and operate. It can quickly realize the clamping and fixing of LCD displays and perform pressure resistance testing. It also has low requirements for the operator's testing level, effectively replacing the testing operation of manually applying pressure, reducing the labor intensity and testing skill level requirements, solving the problem that the inability to control the force and frequency of manual testing can easily lead to inaccurate test results, and significantly improving the accuracy and efficiency of testing. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model;

[0008] Figure 2 This is a schematic diagram of the lower pressure sensor and pressure detection mechanism.

[0009] Figure 3 This is a top view of the structure of the lower pressure sensor and the carrier plate;

[0010] Figure 4 This is a top view schematic diagram of the vacuum suction cup and support beam.

[0011] Figure 5 This is a top view of the structure of the pressure-sensitive actuator and the support plate.

[0012] Figure 6 This is a schematic diagram of the lifting mechanism and vacuum suction cup.

[0013] Figure 7 This is a schematic diagram of the structure of the lower pressure sensor and the carrier plate;

[0014] Figure 8 This is a schematic diagram of the structure of the touch-sensitive actuator and the upper touch-sensitive sensor.

[0015] The following are the labels in the diagram: 1~Detection frame, 2~Support beam, 3~Vacuum suction cup, 4~Carrier plate, 5~Lower touch pressure sensor, 6~Support plate, 7~Touch pressure drive, 8~Touch pressure rod, 9~Upper touch pressure sensor, 10~Silicone pad, 11~Lifting mechanism, 12~Mounting base, 13~Adjusting sleeve, 14~Lighting lamp. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the specific embodiments are described in detail below with reference to the accompanying drawings.

[0017] like Figures 1-8 The pressure testing device for liquid crystal displays shown includes a testing frame 1 and a pressure testing mechanism mounted on the testing frame 1. The testing frame 1 has a frame-like structure. Several support beams 2 are provided at the lower part of the testing frame 1, and vacuum suction cups 3 are provided on each support beam 2. A carrier plate 4 is provided on the testing frame 1 above the support beams 2. Each carrier plate 4 is provided with a lower pressure sensor 5, and a through hole is provided on the carrier plate corresponding to each vacuum suction cup 3. The pressure testing mechanism is mounted on the top of the testing frame 1 through a support plate 6. The pressure testing mechanism includes a pressure driving component 7, a pressure rod 8, and an upper pressure sensor 9. The pressure driving components 7 are all mounted on the support plate 6, and the lower end of the pressure driving component 7 extends through the support plate 6 to its lower end. A pressure rod 8 is provided at the lower end of each pressure driving component 7, and an upper pressure sensor 9 is provided at the lower end of each pressure rod 8. The lower pressure sensors 5, upper pressure sensors 9, and pressure driving components 7 are electrically connected to a control device.

[0018] The working ends of the lower pressure sensor 5 and the upper pressure sensor 9 are provided with silicone pads 10, and the silicone pads 10 are made of conductive silicone.

[0019] The support beam 2 consists of three beams arranged side by side at the lower part of the testing frame 1. A lifting mechanism 11 is installed in the middle of the middle support beam 2, and a vacuum suction cup 3 is installed on the lifting mechanism 11. Vacuum suction cups 3 are installed at both ends of each support beam 2 on both sides, with the working end face of each vacuum suction cup 3 facing upward. Each vacuum suction cup 3 is connected to a vacuum generator through an air pipe circuit. The vacuum generator is electrically connected to a control device, which controls the working state of the vacuum generator and thus controls the adsorption work of the vacuum suction cup 3.

[0020] The lifting mechanism 11 is a pneumatic or hydraulic cylinder, which is fixedly mounted on the support beam 2. A mounting base 12 is provided on the top of the piston rod of the pneumatic or hydraulic cylinder, and a vacuum suction cup 3 is mounted on the mounting base 12.

[0021] The lower pressure sensor 5 and the upper pressure sensor 9 are semiconductor pressure sensors. Semiconductor pressure sensors are known technologies and are readily available on the market, so their specific structure and usage will not be described in detail here.

[0022] Each of the aforementioned lower pressure sensors 5 is provided with an adjustment sleeve 13 coaxially on the outside. The outer wall of the adjustment sleeve 13 is provided with threads. The carrier plate 4 is provided with a screw hole that is threadedly connected to the adjustment sleeve 13. The length of the adjustment sleeve 13 is at least twice the thickness of the carrier plate 4. By rotating the adjustment sleeve 13, the protrusion height of the lower pressure sensor 5 on the carrier plate 4 can be adjusted.

[0023] The pressure-driven component 7 is a cylinder or a hydraulic cylinder, and a mounting sleeve is provided on the top of the piston rod of the pressure-driven component 7 to fix the pressure sensor 9.

[0024] The lower surface of the support plate 6 is also provided with at least four lighting lamps 14, which are LED lamps.

[0025] The control device is a microcontroller or a programmable logic controller (PLC), and is equipped with a touch screen and control keys. The touch screen and control keys are used for human-machine interaction. The touch screen displays the pressure values ​​sensed by the lower pressure sensor 5 and the upper pressure sensor 9 in real time, so as to adjust the stroke of the pressure driving component 7. On the other hand, the electrical connection between the microcontroller or PLC and the semiconductor pressure sensor is also a well-known technology (such as the working method of the pressure testing machine, and its electrical connection and data display method), so its specific structure and usage will not be described in detail here.

[0026] The vacuum suction cup 3 is a rubber vacuum suction cup or a glass suction cup commonly found on the market. It has a strong adsorption and fixing ability, protects the display screen, prevents damage to the LCD display during the clamping process, and can quickly release the suction force of the suction cup to facilitate the removal and unloading of the LCD display, thus achieving quick clamping and unloading.

[0027] The working method of this utility model is as follows: First, adjust the protrusion height of each lower touch sensor 5 to ensure that the working end of each lower touch sensor 5 can contact the lower surface of the liquid crystal display.

[0028] Next, the lower surface of the LCD to be tested is attached to each vacuum suction cup 3, the vacuum generator is started to run, so that the air at the contact part between the LCD and the vacuum suction cup 3 is discharged, thereby clamping and fixing the LCD. Then the power is turned on to the LCD so that it is in a bright screen state throughout the testing process.

[0029] Then, each pressure-driven component 7 is activated, causing the pressure rod 8 to descend. The silicone pad 10 on the pressure rod 8 contacts the LCD screen, and the tester judges whether there are dead pixels on the LCD screen based on the changes in the screen brightness at the contact point. During the process of each pressure-driven component 7 descending and contacting the LCD screen, pressure is inevitably generated. The pressure signal is sensed in real time by the lower pressure sensor 5 and the upper pressure sensor 9 and transmitted to the control device. The sensed pressure value and time are displayed on the touch screen of the control device. The tester obtains the LCD screen's endurance data by combining the pressure intensity and duration sensed in real time by the lower pressure sensor 5 and the upper pressure sensor 9, as well as the changes in the screen brightness of the LCD screen under pressure, with the test standards.

[0030] Before or after the above testing steps, only the lifting mechanism 11 can be activated to lift the vacuum suction cup 3 on it. Only the vacuum suction cup 3 can be used to adhere and fix the liquid crystal display, so that the other vacuum suction cups 3 no longer adhere and fix the liquid crystal display. Then, each touch-pressure drive 7 is activated to drive the touch-pressure rod 8 to descend and apply pressure to the liquid crystal display. The tester can observe the downward bending arc of the liquid crystal display and the changes in the screen brightness of the liquid crystal display in real time, thereby obtaining test data on the bending resistance performance of the liquid crystal display.

[0031] Finally, after the test is completed, activate the touch-sensitive drive 7 to raise and reset the touch-sensitive rod 8, release the suction of the vacuum suction cup 3, and remove the LCD display.

Claims

1. A pressure testing device for a liquid crystal display, comprising a testing frame (1) and a pressure testing mechanism disposed on the testing frame (1), characterized in that: The testing frame (1) is configured as a frame structure. Several support beams (2) are provided at the lower part of the testing frame (1), and vacuum suction cups (3) are provided on each support beam (2). A carrier plate (4) is provided on the testing frame (1) above the support beams (2). Each carrier plate (4) is provided with a pressure sensor (5), and a through hole is provided on the carrier plate corresponding to each vacuum suction cup (3). A pressure detection mechanism is provided at the top of the testing frame (1) via a support plate (6). The pressure detection mechanism includes… The device includes a pressure drive (7), a pressure rod (8), and an upper pressure sensor (9). The pressure drive (7) is mounted on a support plate (6), and the lower end of the pressure drive (7) extends through the support plate (6) to its lower end. A pressure rod (8) is mounted at the lower end of each pressure drive (7), and an upper pressure sensor (9) is mounted at the lower end of each pressure rod (8). The lower pressure sensor (5), the upper pressure sensor (9), and the pressure drive (7) are electrically connected to a control device.

2. The pressure resistance testing device for liquid crystal displays according to claim 1, characterized in that: The working ends of the lower pressure sensor (5) and the upper pressure sensor (9) are provided with silicone pads (10), and the silicone pads (10) are made of conductive silicone.

3. The pressure resistance testing device for liquid crystal displays according to claim 1, characterized in that: There are three support beams (2). The three support beams (2) are arranged side by side at the lower part of the testing frame (1). The middle support beam (2) is equipped with a lifting mechanism (11). Vacuum suction cups (3) are installed on the lifting mechanism (11). Vacuum suction cups (3) are installed at both ends of each support beam (2) on both sides, and the working end face of each vacuum suction cup (3) faces upward.

4. The pressure resistance testing device for a liquid crystal display according to claim 3, characterized in that: The lifting mechanism (11) is a cylinder or a hydraulic cylinder, which is fixedly mounted on the support beam (2). A mounting seat (12) is provided on the top of the piston rod of the cylinder or hydraulic cylinder, and a vacuum suction cup (3) is provided on the mounting seat (12).

5. The pressure resistance testing device for a liquid crystal display according to claim 1, characterized in that: The lower pressure sensor (5) and upper pressure sensor (9) described above are semiconductor pressure sensors.

6. The pressure resistance testing device for a liquid crystal display according to claim 1 or 2 or 5, characterized in that: Each of the aforementioned lower pressure sensors (5) is provided with an adjustment sleeve (13) coaxially on the outside. The outer wall of the adjustment sleeve (13) is provided with threads, and the carrier plate (4) is provided with a screw hole that is threadedly connected to the adjustment sleeve (13).

7. The pressure resistance testing device for liquid crystal displays according to claim 1, characterized in that: The aforementioned pressure-driven component (7) is a cylinder or a hydraulic cylinder.

8. The pressure resistance testing device for a liquid crystal display according to claim 1, characterized in that: The lower surface of the support plate (6) is also provided with at least four lighting lamps (14).

9. The pressure resistance testing device for a liquid crystal display according to claim 1, characterized in that: The control device is a microcontroller or a programmable logic controller (PLC), and is equipped with a touch screen display.

Images