Device for detecting foreign matters behind display screen

Abstract

The utility model relates to the technical field of display screen detection, in particular to a device for detecting a rear foreign matter of a display screen, which comprises a rack, a main control case, and a feeding mechanism, a feeding carrying mechanism, a test fixture, a visual detection mechanism, a discharging carrying mechanism, a qualified product discharging mechanism and an unqualified product discharging mechanism which are respectively arranged on the rack, the testing jig is located below the visual inspection mechanism, the feeding mechanism is used for feeding a display screen, the feeding carrying mechanism is used for carrying the display screen to the testing jig from the feeding mechanism, a light transmitting opening is formed in the upper end of the testing jig, an LED light source is arranged in the testing jig, and the visual inspection mechanism is used for detecting the display screen on the testing jig. The device is novel in structure, reduces the foreign matter omission ratio, reduces material waste and labor time loss, can effectively improve the detection accuracy, and solves the risk that products are damaged when the products are manually sucked and put into a jig.

Description

Technical Field

[0001] The utility model relates to the technical field of display screen detection, in particular to a device for detecting foreign objects behind a display screen. Background Technique

[0002] With the continuous development of display technology, display screens are more and more widely used, and the requirements for their quality and performance are also getting higher and higher. In the manufacturing process of display screens, backlighting is an important link, which directly affects the display effect of the final product. In this process, the LED backlight source needs to be attached to the back of the display screen, and it is necessary to ensure no foreign object contamination to guarantee the display quality. At present, most display screen manufacturers still rely on manual visual inspection to judge whether there are foreign objects during the backlighting process. Although this method is simple and intuitive, it has the following problems: the missed inspection rate and misjudgment rate are relatively high. Due to the difference in human vision, various defective judgments are missed until the later stage, which affects the first-pass yield. Prolonged operation of this position has a certain impact on human vision. The missed inspection of foreign objects also increases the loss of materials and man-hours. Summary of the Invention

[0003] The utility model provides a device for detecting foreign objects behind a display screen in view of the problems of the prior art. The structure is novel, which reduces the missed inspection rate of foreign objects, reduces material waste and man-hour loss, can effectively improve the accuracy of detection, and solves the risk of damaging the product when manually sucking the product and putting it into the fixture.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A device for detecting foreign objects behind a display screen provided by the utility model includes a frame, a main control chassis, and a feeding mechanism, a loading handling mechanism, a test fixture, a vision detection mechanism, a discharging handling mechanism, a qualified product discharging mechanism, and a unqualified product discharging mechanism respectively installed on the frame. The test fixture is located below the vision detection mechanism. The feeding mechanism is used for feeding the display screen. The loading handling mechanism is used for transporting the display screen from the feeding mechanism to the test fixture. A light-transmitting opening is formed at the upper end of the test fixture, and an LED light source is arranged inside the test fixture. The vision detection mechanism is used for detecting the display screen on the test fixture. The discharging handling mechanism is used for transporting the display screen on the test fixture to the qualified product discharging mechanism or the unqualified product discharging mechanism.

[0006] Wherein, a product positioning groove is formed at the upper end of the test fixture, the light-transmitting opening is arranged in the product positioning groove, and a transparent support plate is arranged at the light-transmitting opening.

[0007] Wherein, the feeding mechanism, the qualified product discharging mechanism, and the unqualified product discharging mechanism are of a conveyor belt structure or a conveyor roller shaft structure.

[0008] Among them, the loading and handling mechanism includes a loading adsorption component and a loading XYZ moving module. The loading XYZ moving module is used to drive the loading adsorption component to move in three directions of the X-axis, Y-axis, and Z-axis, and the loading adsorption component is used to adsorb the display screen on the feeding mechanism.

[0009] Among them, the unloading and handling mechanism includes an unloading adsorption component and an unloading XYZ moving module. The unloading XYZ moving module is used to drive the unloading adsorption component to move in three directions of the X-axis, Y-axis, and Z-axis, and the unloading adsorption component is used to adsorb the display screen on the test fixture.

[0010] Among them, the vision detection mechanism includes a detection bracket and a CCD camera installed on the detection bracket.

[0011] Advantages of the present utility model:

[0012] When the present utility model works, the display screen to be detected is transmitted from the feeding mechanism to the working position of the loading and handling mechanism, and then the loading and handling mechanism transfers the display screen to be detected to the test fixture. The LED light source emits light to illuminate the display screen to control the backlight illumination. Then, the vision detection mechanism performs vision detection on the display screen to be detected, detecting one product each time to check for defects (foreign objects, dense points, red and blue spots, etc.) of the display screen to be detected. When a defect is detected, the unloading and handling mechanism transfers the defective display screen to the defective product unloading mechanism for discharging; when no defect is detected on the display screen, the unloading and handling mechanism transfers the defective display screen to the qualified product unloading mechanism for discharging; the structure of the present utility model is novel. By cooperating with the vision detection mechanism and the test fixture, one product is detected at a time, and the vision takes pictures and analyzes the picture, replacing the human eye to judge defects. The judgment rate of foreign object white clusters is more accurate than the manual judgment rate, reducing the missed detection rate of foreign objects, reducing material waste and labor time loss, effectively improving the detection accuracy, and solving the risk of damaging the product when manually sucking the product into the fixture. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of a device for detecting foreign objects behind the display screen of the present utility model.

[0014] Figure 2 It is another perspective structural diagram of a device for detecting foreign objects behind the display screen of the present utility model.

[0015] Figure 3 It is a schematic structural diagram of the test fixture of the present utility model.

[0016] Figure 4 It is a schematic structural diagram of the loading and handling mechanism of the present utility model.

[0017] Figure 5This is a schematic structural diagram of the blanking and handling mechanism of the present utility model.

[0018] In Figures 1 to 5 the attached drawings, the reference numerals include:

[0019] 1. Frame; 2. Feeding mechanism; 3. Loading and handling mechanism; 4. Testing fixture; 5. Vision inspection mechanism; 6. Blanking and handling mechanism; 7. Qualified product blanking mechanism; 8. Unqualified product blanking mechanism; 9. Product positioning groove; 10. Transparent support plate; 11. Loading adsorption component; 12. Loading XYZ movement module; 13. Blanking adsorption component; 14. Blanking XYZ movement module; 15. Detection support; 16. CCD camera. Specific embodiments

[0020] For the convenience of those skilled in the art, the present utility model will be further described below in conjunction with embodiments and the attached drawings. The content mentioned in the embodiments does not limit the present utility model. The present utility model will be described in detail below with reference to the attached drawings.

[0021] A device for detecting foreign objects behind the display screen, as Figures 1 to 5As shown in the figure, it includes a frame 1, a main control chassis, a feeding mechanism 2, a loading handling mechanism 3, a test fixture 4, a vision inspection mechanism 5, a discharging handling mechanism 6, a qualified product discharging mechanism 7, and a non-conforming product discharging mechanism 87, all of which are respectively installed on the frame 1. The test fixture 4 is located below the vision inspection mechanism 5. The feeding mechanism 2 is used for feeding display screens. The loading handling mechanism 3 is used to transport the display screen from the feeding mechanism 2 to the test fixture 4. A light-transmitting opening is provided at the upper end of the test fixture 4, and an LED light source is arranged inside the test fixture 4. The vision inspection mechanism 5 is used to inspect the display screen on the test fixture 4. The discharging handling mechanism 6 is used to transport the display screen on the test fixture 4 to the qualified product discharging mechanism 7 or the non-conforming product discharging mechanism 87. Specifically, when the present utility model works, the display screen to be inspected is transmitted from the feeding mechanism 2 to the station of the loading handling mechanism 3, and then the loading handling mechanism 3 transfers the display screen to be inspected to the test fixture 4. The LED light source emits light to illuminate the display screen to control the backlight illumination. Then, the vision inspection mechanism 5 performs vision inspection on the display screen to be inspected, inspecting one product each time to check for defects (foreign objects, dense points, red and blue spots, etc.) of the display screen to be inspected. When a defect is detected, the discharging handling mechanism 6 transfers the defective display screen to the non-conforming product discharging mechanism 87 for discharging; when no defect is detected on the display screen, the discharging handling mechanism 6 transfers the defective display screen to the qualified product discharging mechanism 7 for discharging; the structure of the present utility model is novel. By the cooperation of the vision inspection mechanism 5 and the test fixture 4, one product is inspected at a time, and the vision takes pictures and analyzes the picture, replacing the human eye to judge defects. The judgment rate of foreign object white clusters is more accurate than the manual judgment rate, reducing the missed inspection rate of foreign objects, reducing material waste and labor time loss, and effectively improving the accuracy of inspection, and solving the risk of damaging the product when the product is manually sucked and placed into the fixture.

[0022] In the embodiment of the present application, a product positioning groove 9 is provided at the upper end of the test fixture 4, the light-transmitting opening is arranged in the product positioning groove 9, and a transparent support plate 10 is arranged at the light-transmitting opening. Specifically, the transparent support plate 10 is made of glass or a transparent plastic plate; the product positioning groove 9 can be used to position the display screen.

[0023] In the embodiment of the present application, the feeding mechanism 2, the qualified product discharging mechanism 7, and the non-conforming product discharging mechanism 87 are of a conveyor belt structure or a conveyor roller shaft structure.

[0024] In the embodiment of the present application, the loading handling mechanism 3 includes a loading adsorption component 11 and a loading XYZ moving module 12. The loading XYZ moving module 12 is used to drive the loading adsorption component 11 to move in three directions of the X-axis, Y-axis, and Z-axis, and the loading adsorption component 11 is used to adsorb the display screen on the feeding mechanism 2.

[0025] In the embodiment of the present application, the blanking handling mechanism 6 includes a blanking adsorption component 13 and a blanking XYZ movement module 14. The blanking XYZ movement module 14 is used to drive the blanking adsorption component 13 to move in three directions of the X-axis, Y-axis, and Z-axis, and the blanking adsorption component 13 is used to adsorb the display screen on the test fixture 4.

[0026] In the embodiment of the present application, the vision detection mechanism 5 includes a detection bracket 15 and a CCD camera 16 installed on the detection bracket 15.

[0027] The above are only preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention is disclosed above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, when making some changes or modifications using the above-disclosed technical content into equivalent embodiments of equivalent changes, but as long as they do not depart from the content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments according to the technical means of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A device for detecting foreign matter behind a display screen, characterized in that: The invention comprises a frame, a main control chassis, and a feeding mechanism, a loading and transporting mechanism, a test jig, a visual inspection mechanism, a unloading and transporting mechanism, a qualified product unloading mechanism, and a failed product unloading mechanism respectively installed on the frame. The test jig is located below the visual inspection mechanism. The feeding mechanism is used for loading a display screen. The loading and transporting mechanism is used for transporting the display screen from the feeding mechanism to the test jig. A light-transmitting port is provided at the upper end of the test jig. An LED light source is arranged in the test jig. The visual inspection mechanism is used for inspecting the display screen on the test jig. The unloading and transporting mechanism is used for transporting the display screen on the test jig to a qualified product unloading mechanism or a failed product unloading mechanism.

2. The device for detecting foreign matter behind a display screen according to claim 1, characterized in that: A product positioning groove is provided at the upper end of the test fixture, the light-transmitting opening is arranged in the product positioning groove, and a transparent supporting plate is arranged at the light-transmitting opening.

3. The device for detecting foreign matter behind a display screen according to claim 1, characterized in that: The feeding mechanism, the qualified product unloading mechanism and the unqualified product unloading mechanism are a transmission belt structure or a transmission roller structure.

4. The device for detecting foreign matter behind a display screen according to claim 1, characterized in that: The loading and transporting mechanism includes a loading adsorption component and a loading XYZ moving module. The loading XYZ moving module is used to drive the loading adsorption component to move in three directions of X axis, Y axis and Z axis. The loading adsorption component is used to adsorb the display screen on the feeding mechanism.

5. The device for detecting foreign matter behind a display screen according to claim 1, characterized in that: The material unloading and handling mechanism includes a material unloading adsorption component and a material unloading XYZ moving module. The material unloading XYZ moving module is used to drive the material unloading adsorption component to move in three directions of X-axis, Y-axis and Z-axis. The material unloading adsorption component is used to adsorb the display screen on the test fixture.

6. The device for detecting foreign matter behind a display screen according to claim 1, characterized in that: The visual detection mechanism comprises a detection bracket and a CCD camera installed on the detection bracket.

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