CN204789391U - Liquid crystal display defect is camera subassembly that moves for automatic check out system - Google Patents

Abstract

The utility model provides a camera movement assembly for a liquid crystal display defect automatic detection system. The camera movement assembly includes a servo motor, a linear motion slide table, a camera mounting frame, a main camera and two side cameras. The servo motor It is installed at one end of the linear motion slide table, and the camera mounting frame is driven to move on the linear motion slide table through a screw rod. The main camera is set directly below the camera mounting frame, and the two side cameras are located on both sides, and fixed on the camera mount. The utility model can transmit and locate the camera quickly and accurately, and at the same time, the detection system of the utility model can replace the traditional human eye detection mode, which can not only save labor costs, but also avoid errors caused by long-term fatigue of human eyes. Judgment, missed inspection.

Description

Camera motion component for automatic defect detection system of liquid crystal display

technical field

The utility model relates to the field of automatic defect detection of liquid crystal display screens, in particular to a camera movement assembly for a liquid crystal display screen defect automatic detection system.

Background technique

Freshly produced LCD screens will be inspected for surface contamination and electrical defects before they are packaged and leave the factory. At present, the common detection method for surface pollution and electrical defects of LCD screens is human eye detection by workers. The main problems of using human eye detection:

1. It needs to consume a lot of human resources, and the labor cost is high;

2. The human eye is prone to fatigue due to long-term detection, and the subjective factors are greatly affected, which may easily cause more misjudgments and missed detections;

3. Human eyes work under dim lights for a long time, workers are prone to occupational diseases, which is not conducive to occupational health.

Therefore, it is necessary to develop an automatic liquid crystal display defect detection system to solve the aforementioned problems, and the camera movement component is a key component of the liquid crystal display defect automatic detection system, and its development is an urgent problem to be solved.

Utility model content

The purpose of the utility model is to provide a camera movement assembly for the liquid crystal display defect automatic detection system to provide a fast and automatic camera transmission mechanism for the detection system in view of the problems existing in the prior art.

The purpose of this utility model is achieved through the following technical solutions:

A camera movement assembly for an automatic liquid crystal display defect detection system, characterized in that the camera movement assembly includes a servo motor, a linear motion slide table, a camera mounting frame, a main camera and two side cameras, and the servo motor It is installed at one end of the linear motion slide table, and drives the camera mounting frame to move on the linear motion slide table through a screw rod. The main camera is set directly below the camera mounting frame, and the two side cameras are located on both sides, and fixed on the camera mount.

As a further technical solution, it is characterized in that a manual sliding table for adjusting the distance between the main camera and the liquid crystal display is provided between the main camera and the camera mounting frame, and a manual sliding table for adjusting the distance between the main camera and the liquid crystal display A manual slide to adjust the distance between the side camera and the LCD screen.

As a further technical solution, the camera movement component includes a light source, which is arranged on a camera mounting frame next to the main camera.

As a further technical solution, the camera movement assembly includes a light source, which is arranged on a manual sliding platform connected with the main camera.

As a further technical solution, the camera mounting frame is provided with a cable drag chain for fixing the camera cable.

Compared with the prior art, the utility model has the following advantages:

1. The camera can be transmitted and positioned quickly and accurately, so as to accurately collect the image information of the LCD screen under test;

2. The detection system using this component can replace the traditional human eye detection mode, which can not only save labor costs, but also avoid misjudgment and missed detection caused by human eye fatigue for a long time;

3. The detection system using this component uses a set of cameras to move back and forth above the two display screen moving components, which can realize single-screen double-station detection, reduce hardware costs and improve detection efficiency;

4. The detection system using this component is equipped with an air purifier, which can purify the air inside the system and provide favorable conditions for the display screen test;

5. The detection system using this component uses a high-resolution camera for image acquisition and a professional image processing computer for image processing and analysis, with high detection accuracy and low misjudgment rate.

Description of drawings

Fig. 1 is the main view structure schematic diagram of using the detection system of the present utility model;

Fig. 2 is a side view structural schematic diagram of Fig. 1;

Fig. 3 is a schematic diagram of the rear view structure of Fig. 1 (the rear door assembly is opened);

Fig. 4 is a structural schematic diagram of the cooperation between the display screen movement component and the camera movement component;

FIG. 5 is a schematic diagram of a three-dimensional structure of a camera movement component;

FIG. 6 is a schematic diagram of the front view structure of the camera movement component;

Fig. 7 is a left view structural diagram of Fig. 6;

Fig. 8 is a schematic perspective view of the three-dimensional structure of the display screen movement assembly.

Explanation of reference signs:

1-operating table, 1.1-casters, 1.2-adjusting feet, 1.3-frame, 1.4-rear door assembly, 1.5-door sensor, 1.6-steel plate, 2-monitor, 3-touch screen, 4-mouse and keyboard drawer, 5-alarm Device, 6-air purifier, 7-camera movement component, 7.1-linear motion slide table, 7.2-servo motor, 7.3-camera mounting frame, 7.4-manual slide table, 7.5-side camera, 7.6-light source, 7.7- Cable drag chain, 7.8-main camera, 8-display motion components, 8.1-linear motion slide table, 8.2-servo motor, 8.3-LCD screen under test, 8.4-cable drag chain, 8.5-installation plate, 8.6-Display installation board, 8.7-Positioning slider, 8.8-Positioning mark slider, 8.9-Backlight adapter board, 9-Electric control system, 10-Computer.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

The utility model provides a camera movement component for an automatic defect detection system of a liquid crystal display screen, which can be used in the automatic defect detection system of a liquid crystal display screen. The structure of the automatic detection system is shown in Fig. 1, Fig. 2 and Fig. 3. It mainly consists of two display screen movement components 8, a camera movement component 7, an electronic control system 9, a computer 10, an alarm 5 and a display 2. Two display screen moving assemblies 8 are arranged in parallel, each display screen moving assembly 8 includes a detection station and an installation station, the installation station is used to install and disassemble the LCD screen under test, and the detection station is used to detect the LCD screen under test . Each display screen moving component can move back and forth between the detection station and the installation station with the screen under test. The camera movement assembly 7 is arranged laterally above the two display screen movement assemblies 8 , and the camera movement assembly 7 can move the camera back and forth between the detection stations of the two display screen movement assemblies 7 . When a display screen movement assembly moved to the detection station with the liquid crystal display (tested), the electronic control system 9 controlled the camera movement assembly 7 to move to the detection station with the camera, and the camera collected the image information of the liquid crystal display and Send it to the computer 10 for image processing. If the liquid crystal display is defective, the display 2 will display the corresponding defect and give an alarm through the alarm 5; at the same time, the electronic control system 9 controls another display screen moving component to move to the installation station, and the workers will be tested. The liquid crystal display is placed on the display screen movement assembly, and then the display screen movement assembly takes the liquid crystal display screen to the detection station for detection, repeating this can realize continuous detection of the display screen under test.

In order to facilitate installation, dustproof, moving, etc., the system is also provided with an operating table 1, which is composed of a frame 1.3 and steel plates 1.6 installed around the frame 1.3. The overall size of the operating table 1 is 1000mm (length) × 1000mm ( Width) × 2145mm (height), in which the frame is made of aluminum alloy profiles, and the steel plate is bent and sprayed steel plate. The interior of console 1 is divided into upper and lower cavities by a mounting plate. There is a table outside at a height of 1010mm. The installation height of display 2 is designed to be 1100mm, which conforms to the design specifications and ergonomics of assembly line factory consoles. An integrated keyboard and mouse drawer 4 is installed under the console 1 table top, which is used for equipment debugging. A 19-inch display 2 and a 7-inch touch screen 3 are installed on the panel of the console 1 to provide data display and parameter selection. An air cleaner 6 is installed on the top of the console 1 to purify the internal air and provide favorable conditions for the liquid crystal display test. Alarm 5 adopts sound and light warning light, and is installed on the top of console 1, has operation indication and alarm function, when equipment breaks down, reminds the operator to pay attention to by its sound and light alarm. The bottom of the console 1 is designed with four casters 1.1 and four adjustment feet 1.2, which are used for moving and fixing leveling of the equipment. A rear door assembly 1.4 and a door sensor 1.5 are arranged at the rear of the console: after the rear door assembly 1.4 is opened, operations such as detection and maintenance of internal components can be performed; the door sensor 1.5 is mainly used to monitor the closing and opening status of the rear door assembly 1.4. The electronic control system 9 and the computer 10 are arranged in the lower cavity. Two display screen moving assemblies 8 and one camera moving assembly 7 are arranged in the upper cavity, and the two display screen moving assemblies 8 are installed on the mounting plate.

The camera movement assembly provided by the utility model has a structure as shown in Figures 4 to 6. The camera movement assembly includes a servo motor 7.2, a linear motion slide table 7.1, a camera mounting frame 7.3, a main camera 7.8 and two side cameras 7.5. The servo motor 7.2 is arranged at one end of the linear motion slide table 7.1, and drives the camera mounting frame 7.3 to move back and forth between the two detection stations of the display screen motion assembly through the screw rod. The main camera 7.8 is arranged directly below the camera mount 7.3, and the two side cameras 7.5 are located on both sides of the main camera 7.8 and are fixed on the camera mount 7.3. In addition, in order to accurately adjust the distance between the main camera and the side camera and the liquid crystal display screen 8.3 under test, a distance between the main camera 7.8 and the camera mounting frame 7.3 is provided for adjusting the distance between the main camera 7.8 and the liquid crystal display screen 8.3 under test. Between the manual sliding table 7.4 of the distance, the manual sliding table 7.4 for adjusting the distance between the side shooting camera 7.5 and the measured liquid crystal display screen 8.3 is provided between the side shooting camera 7.5 and the camera mounting frame 7.3. Moreover, a light source 7.6 is provided on the camera mounting frame 7.3 next to the main camera 7.8 to improve the imaging effect of the camera. The camera mounting frame 7.3 is also provided with a cable drag chain 7.7, which can ensure that the cables are not entangled when the camera group moves left and right.

The utility model also provides a display screen movement assembly, the structure of which is shown in Figure 4, Figure 7 and Figure 8. The display screen motion assembly includes a servo motor 8.2, a linear motion slide table 8.1, a cable drag chain 8.4, and a mounting plate 8.5 , a display screen mounting plate 8.6, a positioning slider 8.7, a positioning mark slider 8.8 and a backlight adapter plate 8.9. One end of the linear motion slide table 8.1 is the detection station, and the other end is the installation station. The servo motor 8.2 is fixed on the detection station end of the linear motion slide table 8.1, and is connected to the installation plate 8.5 through a screw rod, which can drive the installation plate 8.5 It reciprocates between the detection station and the installation station, and at the same time, the cable drag chain 8.4 installed on the installation plate 8.5 can ensure that the cable is not entangled when the liquid crystal display screen 8.3 under test moves back and forth. The display screen installation board 8.6 is fixed on the top of the installation board 8.5, which is used as the installation base of the liquid crystal display screen 8.3 under test. The backlight adapter board 8.9 is installed on the lower right corner of the display screen installation board 8.6, and is connected with the liquid crystal display screen 8.3 under test through a connector. The upper and lower display screen mounting plates 8.6 of the liquid crystal display screen 8.3 to be tested are respectively installed with a positioning mark slider 8.8 and a positioning slider 8.7 to realize constraints in the up and down directions. At the same time, the positioning mark slider 8.8 also provides an image processing reference for the imaging of the liquid crystal display screen 8.3 under test.

After the detection system is powered on, the system performs a self-inspection, the position of the camera movement component and the display movement component return to zero, and the system is ready.

Firstly, the parameters of the display screen to be tested are set on the touch screen 3, and the system automatically calls its corresponding test program. Then the operator installs the LCD screen under test on the left screen mounting plate, and presses the corresponding two start buttons on the operating table at the same time after completion, and the left screen motion component drives the LCD screen under test to move. When the LCD screen under test reaches the predetermined position, the camera on the camera movement component starts to work, completes the image acquisition and sends it back to the computer for image processing. While the moving component of the left display screen is working, the operator installs another LCD screen under test on the mounting plate of the right display screen. Above the moving component of the right display screen, the operator presses the corresponding two start buttons at the same time, and the moving component of the right display screen drives the movement of the LCD screen under test. When the LCD screen under test reaches the predetermined position, the camera on the camera movement component starts to work, completes the image acquisition and sends it back to the computer for image processing. Such a cycle realizes the continuous detection of the display screen under test.

When the tested display screen is defective, the display 2 on the console will display the corresponding defect and remind the operator.

At the same time, the total number of cumulative inspections and the number of defective display screens can be checked on the touch screen 3 .

When an error occurs in the system, the alarm 5 above the operating table will send an alarm to remind the operator to pay attention.

The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. It should be pointed out that any modification, equivalent replacement and improvement made within the spirit and principles of the utility model, etc., All should be included within the protection scope of the present utility model.

Claims (5)

1. a LCDs defect automatic checkout system camera motion assembly, it is characterized in that, described camera motion assembly comprises servomotor, rectilinear motion slide unit, camera erecting frame, main shooting camera and two side shooting cameras, described servomotor is arranged on one end of rectilinear motion slide unit, and drive camera erecting frame to move on rectilinear motion slide unit by screw mandrel, described main shooting camera is arranged on immediately below camera erecting frame, described two side shooting cameras are positioned at the both sides of main shooting camera, and are fixed on camera erecting frame.

2. a kind of LCDs defect automatic checkout system camera motion assembly according to claim 1, it is characterized in that, being provided with the manual slide unit of the spacing for regulating main shooting camera and LCDs between main shooting camera and camera erecting frame, between side shooting camera and camera erecting frame, being provided with the manual slide unit of the spacing for regulating side shooting camera and LCDs.

3. a kind of LCDs defect automatic checkout system camera motion assembly according to claim 1, it is characterized in that, described camera motion assembly comprises light source, and this light source is located on the camera erecting frame of main shooting camera beside.

4. a kind of LCDs defect automatic checkout system camera motion assembly according to claim 2, it is characterized in that, described camera motion assembly comprises light source, and this light source is located on the manual slide unit that is connected with main shooting camera.

5. a kind of LCDs defect automatic checkout system camera motion assembly according to claim 1, it is characterized in that, described camera erecting frame is provided with the cable drag chain for fixed camera cable.