Visual detection device for dead pixels of liquid crystal screen

Abstract

The utility model discloses a liquid crystal display dead pixel visual detection device which comprises a workbench, a conveying belt is arranged on the top of the workbench, a light shield used for covering the middle of the conveying belt is arranged on the workbench, and a plurality of sets of supporting blocks are arranged on the conveying belt. Each group of supporting blocks is provided with positioning grooves for positioning the two ends of a liquid crystal screen to be detected, and the light shield is provided with a through hole for the liquid crystal screen on the conveying belt to pass through; according to the utility model, a liquid crystal screen to be detected is placed in the supporting block on the conveying belt according to a specific posture, then the liquid crystal screen is conveyed into the light shield along with the movement of the conveying belt, at the moment, power-on is carried out through a manual or automatic power-on mechanism, and dead pixel visual detection is carried out on the powered-on liquid crystal screen by utilizing the CCD camera. Therefore, people do not need to watch and check with eyes, and eyes of workers are protected.

Description

Technical Field

[0001] The utility model relates to the technical field related to liquid crystal screen detection, in particular to a device for visually detecting bad pixels of a liquid crystal screen. Background Art

[0002] LEDs are semiconductor light sources based on the PN junction photoelectric effect. Due to their high luminous efficiency and low energy consumption, they have gradually become a mainstream light source and are widely used in industries such as traffic signs, lighting fixtures, automotive turn signals, and urban lighting projects. Display terminals based on LED chips are generally composed of LED unit modules, requiring high performance in terms of brightness, contrast, density, viewing angle, and color uniformity. Dead pixels, defects, and other defects must be strictly controlled. Currently, most inspections are performed manually, which can cause eye discomfort to workers. However, using computer vision to inspect LCD screens can improve inspection efficiency. Existing visual inspections require manual placement of the display screen into an inspection machine, which is inconvenient for manual handling when the screen is too large. Utility Model Content

[0003] In order to solve the defect in the prior art that most of the existing detection is done manually, which may cause discomfort to workers' eyes, the utility model provides a visual detection device for bad pixels of a liquid crystal screen.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] The utility model discloses a visual detection device for bad pixels of a liquid crystal screen, comprising a workbench, a conveyor belt is provided on the top of the workbench, and a light shield is provided on the workbench for covering the middle part of the conveyor belt, a plurality of groups of supporting blocks are provided on the conveyor belt, each group of the supporting blocks is provided with a positioning groove for positioning the two ends of the liquid crystal screen to be detected, the light shield is provided with a through opening for the liquid crystal screen on the conveyor belt to pass through, the workbench is provided with a loading machine arm at the loading end of the conveyor belt, the workbench is provided with a unloading machine arm for unloading the conveyor belt; and the workbench is provided with a charging plug for docking with the charging socket on the liquid crystal screen, the lower end of the light shield is provided with an artificial opening corresponding to the charging socket of the liquid crystal screen fed into the light shield, and the light shield is provided with a CCD camera for entering the liquid crystal screen in the light shield for visual detection.

[0006] As a preferred technical solution of the present invention, an automatic power-on mechanism is installed in the light shield to drive the charging plug to be inserted into the charging socket.

[0007] As a preferred technical solution of the present invention, the automatic power-on mechanism includes an electric push rod arranged horizontally on the inner wall of the light shield, and a mounting plate is fixed to the telescopic end of the electric push rod, and the charging plug is fixed on the mounting plate.

[0008] As a preferred technical solution of the present invention, the conveyor belt performs intermittent motion so that the charging socket of the LCD screen corresponds to the automatic power-on mechanism.

[0009] As a preferred technical solution of the present invention, the light shield is made of a light-proof material.

[0010] The beneficial effects of the utility model are:

[0011] In this LCD screen bad pixel visual inspection device, a loading robot arm is used to place the LCD screen to be inspected in a specific posture on a support block on a conveyor belt, and then the LCD screen is sent into a light shield as the conveyor belt moves. At this time, power is turned on by a manual or automatic power-on mechanism, and then a CCD camera is used to perform a bad pixel visual inspection on the powered LCD screen. In this way, there is no need to use the human eye for viewing and inspection, thereby protecting the workers' eyes. In addition, loading and unloading are performed by the loading robot arm and the unloading robot arm without manual handling, thereby reducing work intensity and saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 This is a structural diagram of a visual detection device for LCD screen bad pixels in the utility model;

[0014] Figure 2 This is a structural diagram of an artificial opening of a visual detection device for LCD screen bad pixels of the utility model;

[0015] Figure 3 The utility model is a structural schematic diagram of an automatic power-on mechanism of a device for visually detecting bad pixels of a liquid crystal screen.

[0016] In the figure: 1. Workbench; 2. Conveyor belt; 3. Light shield; 4. Support block; 5. Positioning slot; 6. Through hole; 7. Loading robot arm; 8. Unloading robot arm; 9. Manual through hole; 10. Automatic power-on mechanism; 11. Electric push rod; 12. Mounting plate; 13. Charging plug; 14. CCD camera. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0018] Example: Figure 1 、 Figure 2 and Figure 3 As shown, the utility model is a visual detection device for bad pixels of LCD screens, comprising a workbench 1, a conveyor belt 2 is provided on the top of the workbench 1, and a light shield 3 for covering the middle part of the conveyor belt 2 is provided on the workbench 1, a plurality of groups of supporting blocks 4 are provided on the conveyor belt 2, each group of the supporting blocks 4 is provided with a positioning groove 5 for positioning the two ends of the LCD screen to be detected, the light shield 3 is provided with a through opening 6 for the LCD screen on the conveyor belt 2 to pass through, the workbench 1 is provided with a loading machine arm 7 at the loading end of the conveyor belt, and a unloading machine arm 8 is provided at the workbench for unloading the conveyor belt 2; and the workbench 1 is provided with a charging plug 13 for docking with the charging socket on the LCD screen, the lower end of the light shield 3 is provided with an artificial opening 9 corresponding to the charging socket of the LCD screen fed into the light shield 3, and the light shield 3 is provided with a CCD camera 14 for entering the LCD screen in the light shield 3 for visual inspection. The LCD screen to be inspected is placed in a specific posture on the support block 4 on the conveyor belt 2 by the loading robot arm 7, and then the LCD screen is sent into the light shield 3 as the conveyor belt 2 moves. At this time, it is powered on by a manual or automatic power-on mechanism 10, and then the CCD camera 14 is used to perform visual inspection of bad pixels on the powered LCD screen. In this way, there is no need to use human eyes for viewing and inspection, thereby protecting the workers' eyes. In addition, loading and unloading are performed by the loading robot arm 7 and the unloading robot arm 8 without manual handling, thereby reducing work intensity and saving manpower.

[0019] The light shield 3 is provided with an automatic power-on mechanism 10 for driving the charging plug to be inserted into the charging socket, so that manual power-on is not required, thereby saving labor costs.

[0020] Among them, the automatic power-on mechanism 10 includes an electric push rod 11 arranged horizontally on the inner wall of the light shield 3, and the telescopic end of the electric push rod 11 is fixed with a mounting plate 12, and the charging plug 13 is fixed on the mounting plate 12. The charging plug 13 is driven to perform plugging and unplugging movements through the telescopic movement of the electric push rod, thereby effectively improving.

[0021] The conveyor belt 2 performs intermittent motion so that the charging socket of the LCD screen corresponds to the automatic power-on mechanism 10 .

[0022] The light shield 3 is made of light-proof material.

[0023] During operation, the device for visually detecting bad pixels of LCD screens uses the loading robot arm 7 to place the LCD screen to be detected in a specific posture on the support block 4 on the conveyor belt 2, and then sends the LCD screen into the light shield 3 as the conveyor belt 2 moves. At this time, power is supplied by a manual or automatic power-on mechanism 10, and then the CCD camera 14 is used to perform visual detection of bad pixels on the powered-on LCD screen. In this way, there is no need to use human eyes for viewing and inspection, thereby protecting the workers' eyes. In addition, loading and unloading are performed by the loading robot arm 7 and the unloading robot arm 8 without manual handling, thereby reducing work intensity and saving manpower.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A device for visually detecting bad pixels on a liquid crystal display, characterized in that: The invention comprises a workbench (1), a conveyor belt (2) is provided on the top of the workbench (1), and a light shield (3) for covering the middle of the conveyor belt (2) is provided on the workbench (1), a plurality of groups of supporting blocks (4) are provided on the conveyor belt (2), and each group of the supporting blocks (4) is provided with a positioning groove (5) for positioning the two ends of the liquid crystal screen to be detected, and a through hole (6) for the liquid crystal screen on the conveyor belt (2) to pass through is provided on the light shield (3). The workbench (1) is located above the conveyor belt. A loading machine arm (7) is provided at the material end, and the workbench is located on a unloading machine arm (8) for unloading the material from the conveyor belt (2); and a charging plug (13) for docking with the charging socket on the liquid crystal screen is provided on the workbench (1), and an artificial opening (9) corresponding to the charging socket of the liquid crystal screen fed into the light shield (3) is provided at the lower end of the light shield (3), and the light shield (3) is provided with a CCD camera (14) for visual inspection of the liquid crystal screen entering the light shield (3).

2. The LCD screen bad pixel visual detection device according to claim 1, characterized in that: An automatic power-on mechanism (10) is installed in the light shield (3) to drive the charging plug to be inserted into the charging socket.

3. The device for visually detecting bad pixels on a liquid crystal display according to claim 2, wherein: The automatic power-on mechanism (10) comprises a horizontally arranged electric push rod (11) provided on the inner wall of the light shield (3), a mounting plate (12) being fixed to the telescopic end of the electric push rod (11), and the charging plug (13) being fixed on the mounting plate (12).

4. The LCD screen bad pixel visual detection device according to claim 2, characterized in that: The conveyor belt (2) performs intermittent motion so that the charging socket of the liquid crystal screen corresponds to the automatic power-on mechanism (10).

5. The LCD screen bad pixel visual detection device according to claim 1, characterized in that: The light shield (3) is made of a light-proof material.

Images