Intelligent detection device for keyboard backlight module

Abstract

The utility model relates to an intelligent detection device for a keyboard backlight module, which belongs to the technical field of keyboard detection and comprises a box body, glass, a visual camera and a display are arranged at the upper end of the box body, a controller is arranged on the front side of the box body, and an electric conveying belt is arranged in the box body and used for conveying the backlight module. A first hydrophobic and oleophobic coating is arranged on the lower surface of the glass, an AR coating film is arranged on the upper surface of the glass, a second hydrophobic and oleophobic coating is arranged on the upper surface of the AR coating film, and the inner wall of the through groove is fixed to the periphery of the glass through a glue solution; a visual camera and a displayer are fixed to the upper end of the box body through a support, and the visual camera is opposite to the upper end of the glass. Light reflection is reduced through the AR coating film, reflection interference is reduced, the first hydrophobic and oleophobic coating layer and the second hydrophobic and oleophobic coating layer on the upper surface of the AR coating film prevent stain attachment so as to reduce light refraction / scattering, meanwhile, the diffuse reflection influence caused by scratches can be reduced, and therefore misjudgment is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of keyboard detection technology, specifically relating to an intelligent detection device for keyboard backlight modules. Background Technology

[0002] Keyboard backlight module testing is conducted to ensure that the backlight function meets design standards, such as ensuring uniform backlight brightness without overly bright or dark areas, avoiding issues like light leakage and flickering, and checking the accuracy and consistency of backlight color. This prevents module defects from affecting user experience and product quality, especially in low-light environments where stable and reliable backlighting is crucial for keyboard operation. Furthermore, testing can promptly identify defects in the production process, reducing the defect rate and enhancing product competitiveness. Testing is typically performed using a keyboard backlight module testing device.

[0003] For example, prior art application number CN202021237484.9 discloses an automatic calibration and testing device for a keyboard backlight module based on machine vision, comprising: a detection device configured as a six-sided box, each side of the six-sided box being rectangular, wherein a display screen is provided on the top baffle of the box, wherein a generally rectangular window is provided in the middle of the top baffle, and a glass panel is installed in the window of the top baffle, the shape of the window being adapted to the shape of the keyboard backlight module, the shape of the window being such that the keyboard backlight module is placed exactly on the glass panel, and the edges of the keyboard backlight module are aligned with the edges of the window; a camera module, an LED light module, and a controller are provided on the bottom plate of the box; wherein the camera module, LED light module, display screen, keyboard backlight module, and controller are electrically connected;

[0004] The aforementioned existing technology mainly relies on placing the keyboard backlight module precisely on the glass panel and using a camera for detection. However, the glass panel is susceptible to optical interference: if there are scratches, stains, or reflections on the surface of the glass panel, the diffuse reflection of light from the LED lights shining on the glass panel or the light emitted by the backlight module itself will be refracted / scattered, resulting in light spots and shadows in the image captured by the camera, interfering with the judgment of defects such as "light leakage, dark spots, and color shift," such as misjudging glass scratches as uneven light emission from the module. Therefore, we have improved the aforementioned existing technology based on actual usage. Utility Model Content

[0005] The purpose of this invention is to provide an intelligent detection device for keyboard backlight modules, which can solve the problems mentioned in the background art.

[0006] The specific technical solution adopted in this utility model is as follows:

[0007] A smart detection device for keyboard backlight modules includes a housing, with glass, a vision camera, and a display disposed at the upper end of the housing, a controller disposed at the front side of the housing, and an electric conveyor belt disposed inside the housing for conveying the backlight modules. The lower surface of the glass is provided with a first hydrophobic and oleophobic coating, and the upper surface of the glass is provided with an AR coating, and the upper surface of the AR coating is provided with a second hydrophobic and oleophobic coating.

[0008] The present invention is further configured such that: the inner wall of the through groove is fixed to the glass perimeter by adhesive, and the upper end of the housing is fixed to the vision camera and the display by a bracket, with the vision camera facing the upper end of the glass.

[0009] The present invention is further configured such that: both ends of the electric conveyor belt pass through the housing, and the front and rear surfaces of the housing are fixed to the fixing seat of the electric conveyor belt by a bracket.

[0010] The present invention is further configured such that at least four grooves are provided on both the upper and lower surfaces of the electric conveyor belt for placing the backlight module.

[0011] The present invention is further configured such that a displacement sensor is fixed to one side of each groove by a rivet.

[0012] This utility model is further configured such that the entrances and exits of the box are all fixed with light-blocking curtains by rivets.

[0013] The technical effects achieved by this utility model are as follows:

[0014] This utility model discloses an intelligent detection device for keyboard backlight modules. The AR coating on the upper surface of the glass reduces light reflection and reduces reflective interference. The first hydrophobic and oleophobic coating on the lower surface of the glass and the second hydrophobic and oleophobic coating on the upper surface of the AR coating prevent the adhesion of stains to reduce light refraction / scattering. At the same time, the two hydrophobic and oleophobic coatings can also reduce the diffuse reflection caused by scratches, thereby avoiding light spots, shadows and misjudgments in the captured image.

[0015] Improved inspection efficiency: The electric conveyor belt has grooves on both the upper and lower surfaces, which can transport multiple backlight modules at the same time, enabling uninterrupted cyclic inspection. Compared with the original device, which required manual replacement of the module to be inspected, the loading time is significantly shortened. At the same time, the displacement sensor monitors the position of the backlight module in real time. When the module is directly under the vision camera, it automatically triggers the photo taking, eliminating the need for manual operation of the test button and reducing the time cost of human intervention. The groove design allows multiple backlight modules to be placed at the same time. Combined with the continuous operation of the electric conveyor belt, batch inspection can be achieved. The combination of these three factors increases the inspection efficiency. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the present invention;

[0017] Figure 2 This is a top view of the present invention;

[0018] Figure 3 This is a cross-sectional structural diagram of the glass of this utility model;

[0019] Figure 4 This is the utility model Figure 1 Enlarged schematic diagram of point a in the middle.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Cabinet; 2. Through slot; 3. Glass; 4. Electric conveyor belt; 5. Vision camera; 6. AR coating; 7. First hydrophobic and oleophobic coating; 8. Second hydrophobic and oleophobic coating; 9. Backlight module; 10. Controller; 11. Display; 12. Groove; 13. Displacement sensor; 14. Blackout curtain; Detailed Implementation

[0022] To make the purpose and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific implementations of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0023] like Figures 1 to 4 As shown, an intelligent detection device for keyboard backlight modules includes a housing 1. A glass panel 3, a vision camera 5, and a display 11 are mounted on the upper part of the housing 1. A controller 10 is mounted on the front side of the housing 1. An electric conveyor belt 4 is installed inside the housing 1 to transport the backlight module 9. A first hydrophobic and oleophobic coating 7 is applied to the lower surface of the glass panel 3, and an AR coating 6 is applied to the upper surface of the glass panel 3. A second hydrophobic and oleophobic coating 8 is also applied to the upper surface of the AR coating 6. It should be noted that the controller 10 is an Advantech UNO-2172G model, and the vision camera 5 is a Baslerace2 series (such as acA1920-40gm).

[0024] The first hydrophobic and oleophobic coating 7 and the second hydrophobic and oleophobic coating 8 are usually made of fluoropolymers (such as perfluorooctyltriethoxysilane PFOTS) or fluorocarbon materials. The dry film thickness is controlled at 5-20 nm. They are bonded to the glass using chemical vapor deposition (CVD) (the glass is placed in a vacuum chamber, a fluorosilane precursor is introduced, and deposition is carried out at 100-200°C or under plasma assistance to form a chemically bonded uniform film) or dip coating (the glass is immersed in a 0.1-1% concentration of fluorine-containing coating solution, pulled up at a constant speed, and then baked at 150°C for 30 minutes to cure).

[0025] AR coatings typically employ alternating layers of high-refractive-index materials (such as TiO2, n≈2.3) and low-refractive-index materials (such as SiO2, n≈1.45) to form a multilayer film structure (typically air / SiO2 / TiO2 / SiO2 / glass), with a total thickness of approximately 200-500 nm (50-150 nm per layer, with a center wavelength of 550 nm). They are bonded to glass using magnetron sputtering or electron beam evaporation processes in physical vapor deposition.

[0026] refer to Figure 1 The inner wall of the channel 2 is fixed to the glass 3 around the perimeter with adhesive. The upper end of the housing 1 is fixed with a bracket to the vision camera 5 and the display 11, and the vision camera 5 is opposite to the upper end of the glass 3.

[0027] refer to Figure 1 The electric conveyor belt 4 passes through the box 1 at both ends, and the front and rear surfaces of the box 1 are fixed to the fixed seat of the electric conveyor belt 4 by the bracket.

[0028] refer to Figure 2 and Figure 4 The electric conveyor belt 4 has at least four grooves 12 on both its upper and lower surfaces for placing the backlight module 9. It should be noted that before placing the backlight module 9, a small magnetic connector (similar to a wireless charging port for mobile phones) needs to be installed on the side of the backlight module 9. Matching magnetic interfaces are pre-installed at corresponding positions on the backlight module 9. When the module is placed in, the magnetic force automatically attracts it and connects the power supply, making operation simple and ensuring that the backlight module 9 maintains its brightness during the detection process.

[0029] refer to Figure 4 Each groove 12 has a displacement sensor 13 fixed to one side by a rivet to detect the position of the vision camera 5.

[0030] refer to Figure 1 The entrance and exit of the box 1 are both fixed with light-blocking curtains 14 by rivets to block the outside light. They can be composed of vertical strips with adjacent horizontal surfaces.

[0031] The working principle of this utility model is as follows: When the backlight module 9 is placed in the groove 12 of the electric conveyor belt 4, the displacement sensor 13 detects the position of the backlight module 9 in real time. When it is detected that the backlight module 9 is conveyed to the bottom of the glass 3 and within the shooting range of the vision camera 5, the displacement sensor 13 transmits a signal to the controller 10. The controller 10 then controls the electric conveyor belt 4 to stop conveying and triggers the vision camera 5 to take a picture for detection. After the picture is taken, the controller 10 restarts the electric conveyor belt 4 to convey the detected backlight module 9 and convey the next module to be detected.

[0032] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the art.

Claims

1. An intelligent detection device for a keyboard backlight module, comprising a housing (1), wherein the upper end of the housing (1) is provided with a through groove (2), glass (3), a vision camera (5), and a display (11), characterized in that: A controller (10) is provided on the front side of the housing (1), and an electric conveyor belt (4) is provided inside the housing (1) for conveying the backlight module (9). A first hydrophobic and oleophobic coating (7) is provided on the lower surface of the glass (3), and an AR coating (6) is provided on the upper surface of the glass (3), and a second hydrophobic and oleophobic coating (8) is provided on the upper surface of the AR coating (6).

2. The intelligent detection device for a keyboard backlight module according to claim 1, characterized in that: The inner wall of the through groove (2) is fixed to the glass (3) around the perimeter with adhesive. The upper end of the box (1) is fixed with a vision camera (5) and a display (11) by a bracket, and the vision camera (5) is opposite to the upper end of the glass (3).

3. The intelligent detection device for a keyboard backlight module according to claim 1, characterized in that: The electric conveyor belt (4) passes through the box (1) at both ends, and the front and rear surfaces of the box (1) are fixed to the fixing seat of the electric conveyor belt (4) by the bracket.

4. The intelligent detection device for a keyboard backlight module according to claim 3, characterized in that: The electric conveyor belt (4) has at least four grooves (12) on both its upper and lower surfaces for placing the backlight module (9).

5. The intelligent detection device for a keyboard backlight module according to claim 4, characterized in that: A displacement sensor (13) is fixed to one side of each groove (12) by a rivet.

6. The intelligent detection device for a keyboard backlight module according to claim 1, characterized in that: The entrances and exits of the box (1) are all fixed with light-blocking curtains (14) by rivets.

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