Calibration equipment for screen detection
By designing calibration equipment for screen detection, using the combination of U-shaped fixtures, prism components and visual components, the problems of insufficient alignment state monitoring and poor dimensional adaptability in the prior art are solved, and high-precision and automated screen detection are achieved.
Patent Information
- Application Number
- CN202510331276.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2025-06-27
AI Technical Summary
Existing screen detection equipment lacks real-time monitoring of the contact status of the probe and the cable, which makes it difficult to distinguish the causes of detection failure. The fixture size is fixed and cannot adapt to screens of different sizes, resulting in deviations in the detection structure, reducing detection efficiency and misjudgment of qualified screens as bad products.
A calibration device for screen detection is designed, including a U-shaped fixture, a prism assembly and a visual component, and the fixture is adjusted through a slide groove to adapt to screens of different sizes, and the prism assembly and visual component are used to realize real-time monitoring of the alignment status of the probe and the cable.
Real-time feedback on the alignment status of the probe and the cable is achieved, misjudgment caused by alignment problems is avoided, detection accuracy and automation are improved, and screens of different sizes are adapted to ensure detection accuracy and efficiency.
Smart Images
Figure CN120214446A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of screen detection, and particularly to a calibration device for screen detection. Background Art
[0002] In the screen assembly and factory inspection processes, it is usually necessary to visually inspect the screen functions by powering on the screen to identify defects such as abnormal display and circuit damage.
[0003] Existing detection devices complete signal transmission through physical contact between power-on probes and the screen flexible cable. However, the precise alignment of the probes and the flexible cable is a key prerequisite for ensuring the effectiveness of detection. However, in the current detection process, there is a lack of a real-time monitoring mechanism for the contact state between the probes and the flexible cable, resulting in the inability to quickly distinguish the specific reasons for detection failure. If the screen fails the detection, it is difficult for the operator to determine whether the screen itself has defects or whether it is a misjudgment caused by problems such as probe deviation and poor contact. In addition, the size of the existing fixtures is fixed and cannot meet the detection requirements for different sizes of screens. When the screen size is different, it is impossible to ensure the precise alignment of the screen flexible cable and the probes of the detection mechanism, resulting in deviation of the detection results. This limitation not only reduces the detection efficiency but also may lead to qualified screens being misjudged as defective products, increasing the rework cost.
[0004] How to achieve instant feedback on the alignment state between the probes and the flexible cable and verification of detection reliability has become the core problem in improving the screen detection accuracy and automation level. Moreover, since the flexible cable of the screen is usually blocked by the detection mechanism above when placed on the fixture and requires backlight for auxiliary detection imaging below, the problem of how to calibrate the screen flexible cable and the probes has become a problem faced by the existing technology. Summary of the Invention
[0005] The purpose of the present invention is to provide a calibration device for screen detection, which can adjust the fixture to enable the screen to be in an accurate detection position and can timely monitor whether the screen and the probes are precisely aligned, thereby avoiding misjudgment caused by alignment problems during screen detection.
[0006] The technical solution adopted by a calibration device for screen detection disclosed by the present invention is:
[0007] A calibration device for screen detection, comprising a mounting plate and a fixture. The fixture is arranged on the mounting plate. The fixture has a U-shaped structure. Both sides of the fixture are provided with sliding grooves. The sliding grooves extend along the surface of the fixture. An adjustment plate is arranged between the two sliding grooves. The two ends of the adjustment plate are respectively fixedly connected to the sliding grooves through fasteners. One side of the fixture is provided with a prism assembly. The prism assembly and the fixture form a frame structure for placing the detection screen. And a light source plate is arranged below the fixture. The mounting plate is provided with a window corresponding to the light source plate. A pressing and power-on mechanism is arranged corresponding to the upper part of the prism assembly. The pressing and power-on mechanism is used for detecting the screen. A vision component is arranged on one side of the prism assembly. The vision component is used for photographing the image refracted by the prism assembly. The prism assembly is used for refracting the image on one side below the pressing and power-on mechanism into the vision component.
[0008] As a preferred solution, a suction cup mechanism is arranged above the fixture. The suction cup mechanism is used for grasping the screen. The suction cup mechanism includes a moving plate. Suction cups are correspondingly arranged at the four corners of the moving plate.
[0009] As a preferred solution, the prism assembly includes a first prism and a second prism. The cross-section of the first prism is in a parallelogram structure. The cross-section of the second prism is in a right trapezoid structure. The first prism is horizontally arranged on one side of the fixture. The right-angle side of the second prism is attached to the lower surface of the first prism close to the vision component side. And the second prism is arranged perpendicular to the first prism. The inclined surface structure of the second prism is arranged on the side away from the vision component.
[0010] As a preferred solution, the inclined surface angle of the first prism is 45°. The inclined surface angle of the second prism is 45°.
[0011] As a preferred solution, the vision component includes a camera, a lens and a point light source. The camera and the lens are coaxially arranged. The point light source is arranged on the side of the lens. And the point light source is communicated with the inside of the lens.
[0012] As a preferred solution, the number of the vision components is at least one. The vision components are arranged along the prism assembly.
[0013] As a preferred solution, the pressing and power-on mechanism includes a mounting post, a lifting cylinder and a pressing head. The mounting post is fixed on the surface of the mounting plate. The lifting cylinder is fixed on the mounting post. The pressing head is fixedly connected to the lifting cylinder. The lifting cylinder drives the pressing head to move up and down. The pressing head is correspondingly arranged above the prism assembly. And a contact is arranged below the pressing head for connecting the screen cable.
[0014] The beneficial effects of a calibration device for screen detection disclosed by the present invention are as follows: The screen to be tested is placed above the jig and the prism assembly, and the flexible circuit part of the screen is placed above the prism assembly. The frame structure formed by the jig and the prism assembly allows the light on the light source board to pass through the mounting plate and the jig and irradiate below the screen. When the vision mechanism above the screen is detecting, it plays a role in supplementary lighting. And the distance between the adjustment plate and the prism assembly can be adjusted through the sliding groove, so as to adapt to screens of different sizes, ensuring that the flexible circuit on the screen can be placed above the prism assembly for the pressing and power-on mechanism to make contact and conduct. The pressing and power-on mechanism conducts in alignment with the flexible circuit on the screen. At the same time, the prism assembly corresponding to the lower part of the screen flexible circuit transmits the picture to the vision component through multiple refractions. The vision component identifies and judges whether the pressing and power-on mechanism is accurately aligned, avoiding misjudgment caused by alignment problems during screen detection. When it is necessary to set a light source below the screen during screen detection, the space below the screen is limited. Therefore, the flexible circuit part of the screen is placed above the prism assembly, and the prism assembly serves the purpose of avoiding interference, preventing conflicts in the installation positions of the vision component and the light source board, and ensuring that the accurate alignment between the screen and the pressing and power-on mechanism can be monitored without affecting screen detection. Description of the Drawings
[0015] Figure 1 is a schematic structural diagram of a calibration device for screen detection according to the present invention.
[0016] Figure 2 is a schematic structural diagram of the jig of a calibration device for screen detection according to the present invention.
[0017] Figure 3 is a schematic structural diagram of the prism module of a calibration device for screen detection according to the present invention.
[0018] Figure 4 is a schematic diagram of the picture path of a calibration device for screen detection according to the present invention.
[0019] Figure 5 is a schematic structural diagram of the pressing and power-on mechanism of a calibration device for screen detection according to the present invention.
[0020] Figure 6 is a schematic structural diagram of the vision component of a calibration device for screen detection according to the present invention. Detailed Embodiments
[0021] The following further elaborates and explains the present invention in conjunction with specific embodiments and the drawings of the specification:
[0022] Please refer to Figures 1 to 4, A calibration device for screen detection, including a mounting plate 10 and a fixture 20. The fixture 20 is arranged on the mounting plate 10. The fixture 20 has a U-shaped structure. Both sides of the fixture 20 are provided with sliding grooves 21. The sliding grooves 21 extend along the surface of the fixture 20. An adjustment plate 22 is arranged between the two sliding grooves 21. The two ends of the adjustment plate 22 are respectively fixedly connected to the sliding grooves 21 through fasteners. One side of the fixture 20 is provided with a prism assembly 30. The prism assembly 30 and the fixture 20 form a frame structure for placing the detection screen. And a light source plate 40 is arranged below the fixture 20. The mounting plate 10 is provided with a window corresponding to the light source plate 40. A pressing and energizing mechanism 50 is correspondingly arranged above the prism assembly 30. The pressing and energizing mechanism 50 is used for detecting the screen. A vision component 60 is arranged on one side of the prism assembly 30. The vision component 60 is used for photographing the image refracted by the prism assembly 30. The prism assembly 30 is used for refracting the image on one side below the pressing and energizing mechanism 50 into the vision component 60.
[0023] Place the screen to be tested above the fixture 20 and the prism assembly 30, and place the cable part of the screen above the prism assembly 30. The frame structure formed by the fixture 20 and the prism assembly 30 can make the light on the light source plate 40 pass through the mounting plate 10 and the fixture 20 and irradiate below the screen, so that when the vision mechanism above the screen detects, it plays a role in supplementary lighting.
[0024] The distance between the adjustment plate 22 and the prism assembly 30 can be adjusted through the sliding groove 21, so as to adapt to screens of different sizes, ensure that the cable on the screen can be placed above the prism assembly 30, and supply the pressing and energizing mechanism 50 to make contact conduction.
[0025] The pressing and energizing mechanism 50 conducts alignment and conduction with the cable on the screen. At the same time, the prism assembly 30 below the corresponding screen cable transfers the image to the vision component 60 through multiple refractions. The vision component 60 is used to identify and judge whether the pressing and energizing mechanism is accurately aligned, avoiding misjudgment caused by alignment problems during screen detection. When detecting the screen, a light source needs to be set below it, resulting in limited space below the screen. Therefore, place the cable part of the screen above the prism assembly 30 to achieve the purpose of avoiding position through the prism assembly 30, avoiding conflicts in the installation positions of the vision component 60 and the light source plate 40, and ensuring that the accurate alignment between the screen and the pressing and energizing mechanism 50 can be monitored without affecting screen detection.
[0026] A suction cup mechanism 70 is arranged above the fixture 20. The suction cup mechanism 70 is used to grab the screen. The suction cup mechanism 70 includes a moving plate 71. Suction cups 72 are correspondingly arranged at the four corners of the moving plate 71. The screen can be adsorbed and grabbed through the suction cups 72, and can cooperate with existing structures such as robotic arms or moving modules to drive the suction cup mechanism 70 to move, so as to accurately place the screen above the fixture 20 and the prism assembly 30.
[0027] Please refer to Figure 3 and Figure 4 , the prism assembly 30 includes a first prism 31 and a second prism 32. The cross-section of the first prism 31 is in a parallelogram structure, and the cross-section of the second prism 32 is in a right trapezoid structure. The first prism 31 is horizontally arranged on one side of the jig 20. The right-angle side of the second prism 32 is attached to the lower surface of the first prism 31 on the side close to the vision component 60, and the second prism 32 is arranged perpendicular to the first prism 31. The inclined surface structure of the second prism 32 is arranged on the side away from the vision component 60. The inclined surface angle of the first prism 31 is 45°, and the inclined surface angle of the second prism 32 is 45°.
[0028] The first prism 31 ensures that the area where the screen is placed is flat. By using the structure that the cross-section of the first prism 31 is a parallelogram, that is, both sides of the first prism 31 are inclined surface structures, and the inclined surface angle is 45°, the picture on the upper surface of the first prism 31 can be refracted twice at 45°, so that the picture corresponding to the screen cable is transmitted to the lower surface on the other side of the first prism 31. Then, through the second prism 32 being attached to the lower surface on the other side of the first connection, the picture of the first prism 31 enters the second prism 32. Using the inclined surface structure of the second prism 32 for another picture refraction, the inclined surface angle of the second prism 32 is 45°, so that the picture enters the vision component 60 in a horizontal state.
[0029] Please refer to Figure 5 , the vision component 60 includes a camera 61, a lens 62 and a point light source 63. The camera 61 and the lens 62 are coaxially arranged. The point light source 63 is arranged on the side of the lens 62 and is internally connected to the lens 62. The point light source 63 can play a role in supplementary lighting. And the number of the vision components 60 is at least one. The vision components 60 are arranged along the prism assembly 30. Since the widths of different-sized screens are different, therefore, the prism assembly 30 can be set to a structure with a larger width to ensure that it can meet the sizes of different screens. Therefore, in order to ensure that the vision component 60 can cover the picture refracted by the prism assembly 30, the coverage rate can be increased by adding the vision components 60 to avoid omission.
[0030] Please refer to Figure 6 , the pressing and energizing mechanism 50 includes a mounting post 51, a lifting cylinder 52 and a pressing head 53. The mounting post 51 is fixed on the surface of the mounting plate 10. The lifting cylinder 52 is fixed on the mounting post 51. The pressing head 53 is fixedly connected to the lifting cylinder 52. The lifting cylinder 52 drives the pressing head 53 to move up and down. The pressing head 53 is correspondingly arranged above the prism assembly 30, and there is a contact under the pressing head 53 for connecting the screen cable.
[0031] The present invention provides a calibration device for screen detection. The screen to be tested is placed above a jig and a prism assembly, and the flexible cable part of the screen is placed above the prism assembly. The frame structure formed by the jig and the prism assembly allows the light on the light source board to pass through the mounting plate and the jig and irradiate below the screen. When the vision mechanism above the screen performs detection, it plays a role in supplementary lighting. The pressing and power-on mechanism is conductively aligned with the flexible cable on the screen. At the same time, the prism assembly corresponding to the lower part of the screen cable transfers the picture to the vision component through multiple refractions. The vision component is used to identify and judge whether the pressing and power-on mechanism is accurately aligned, so as to avoid misjudgment caused by alignment problems during screen detection. When performing screen detection, it is necessary to set a light source below the screen, resulting in limited space below the screen. Therefore, the flexible cable part of the screen is placed above the prism assembly to achieve the purpose of avoiding interference through the prism assembly, preventing conflicts between the installation positions of the vision component and the light source board, and ensuring that the accurate alignment between the screen and the pressing and power-on mechanism can be monitored without affecting screen detection.
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.
Claims
1. A calibration device for screen detection, characterized in that: It includes a mounting plate and a jig, wherein the jig is arranged on the mounting plate, and the jig is in a U-shaped structure. Slide grooves are arranged on both sides of the jig, and the slide grooves are extended along the surface of the jig. An adjustment plate is arranged between the two slide grooves, and both ends of the adjustment plate are fixedly connected to the slide grooves by fasteners. A prism assembly is arranged on one side of the jig, and the prism assembly and the jig form a frame structure for placing a detection screen. A light source board is arranged below the jig, and a window is opened on the mounting plate corresponding to the light source board. A pressing and energizing mechanism is arranged above the prism assembly, and the pressing and energizing mechanism is used to detect the screen. A visual assembly is arranged on one side of the prism assembly, and the visual assembly is used to shoot the picture refracted by the prism assembly. The prism assembly is used to refract the picture on the side below the pressing and energizing mechanism into the visual assembly.
2. A calibration device for screen detection as claimed in claim 1, characterized in that: A suction cup mechanism is provided above the fixture, and the suction cup mechanism is used to grab the screen. The suction cup mechanism comprises a moving plate, and suction cups are correspondingly provided at the four corners of the moving plate.
3. A calibration device for screen detection as claimed in claim 1, characterized in that: The prism assembly includes a first prism and a second prism, the first prism has a parallelogram cross-section, the second prism has a right-angled trapezoidal cross-section, the first prism is horizontally arranged on one side of the fixture, the right-angled side of the second prism is in contact with the lower surface of the first prism close to the visual component, and the second prism is arranged perpendicular to the first prism, and the inclined surface structure of the second prism is arranged away from the visual component.
4. A calibration device for screen detection as claimed in claim 3, characterized in that: The inclined surface angle of the first prism is 45°, and the inclined surface angle of the second prism is 45°.
5. A calibration device for screen detection as claimed in claim 1, characterized in that: The visual component includes a camera, a lens and a point light source. The camera and the lens are coaxially arranged. The point light source is arranged on the side of the lens, and the point light source is connected to the inside of the lens.
6. A calibration device for screen detection as claimed in claim 1, characterized in that: The number of the visual components is at least one, and the visual components are arranged along the prism component.
7. A calibration device for screen detection as claimed in claim 1, characterized in that: The pressing and energizing mechanism includes a mounting column, a lifting cylinder and a pressing head. The mounting column is fixed to the mounting plate, the lifting cylinder is fixed to the mounting column, the pressing head is fixedly connected to the lifting cylinder, the lifting cylinder drives the pressing head to move up and down, the pressing head is correspondingly arranged above the prism assembly, and a contact is provided under the pressing head for connecting the screen cable.