Inspection table suitable for appearance inspection of OLED (Organic Light Emitting Diode) optical film

Abstract

The utility model relates to an inspection table suitable for inspecting the appearance of an OLED (Organic Light Emitting Diode) optical film. The device comprises a supporting rack and a positioning frame, the positioning frame is connected relative to a horizontal rotating shaft of the supporting rack, an overturning servo assembly is arranged on the supporting rack, a lead screw, a guide rod and a moving seat are further arranged on the positioning frame, a light source frame is arranged on the moving seat, a plurality of light sources are arranged on the light source frame, and a servo motor in transmission connection with the lead screw is arranged on the positioning frame. The inspection table further comprises a plurality of pressing strips capable of generating a magnetic attraction effect with the upper surface of the positioning frame. According to the utility model, the overturning servo assembly is controlled to drive the positioning frame to overturn up and down, so that the positioning frame is overturned to a proper observation angle, then the servo motor drives the light source on the moving seat to move from one side of the positioning frame to the other side of the positioning frame at a constant speed, and the light source is integrally positioned below the OLED optical film and continuously irradiates the OLED optical film; therefore, the diffraction phenomenon of the coating in each area can be observed by naked eyes, the whole detection process is simplified, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to an optical film detection device, in particular to an inspection table suitable for the appearance inspection of OLED optical films. Background Art

[0002] The flexible OLED optical film is a key component of a display device prepared on a flexible substrate. It combines the advantages of OLED technology such as self-luminescence, wide viewing angle, and high contrast, as well as the bendable and foldable characteristics brought by the flexible substrate. It is often applied to display devices such as foldable mobile phone screens, TVs, and electronic billboards. In the production process of the flexible OLED optical film, there is a coating process, that is, a layer or multiple layers of glue, pigment, or ink with specific functions are applied to the substrate through a flexible OLED optical film coater (also known as a high-precision optical film coater) to endow it with specific optical properties.

[0003] In order to ensure the coating quality of the flexible OLED optical film, generally, a sampling inspection method is adopted to visually detect the coated optical film to check the coating quality. In this process, in order to facilitate the fixation of the optical film, generally, an inspection rack for flatly fixing the optical film and a light source need to be equipped for the inspectors. The specific detection principle is as follows: When light irradiates the optical film at a certain angle, the light will produce a diffraction effect on the coating to generate a color film that can be observed by the human eye, which is convenient for the human eye to identify the transparent coating that is not easily observed clearly. When the color films at various parts of the optical film are complete and unified, it indicates that the coating quality is qualified. On the contrary, when any defect appears in the color film on the optical film, it indicates that the coating quality is unqualified. However, the existing inspection rack has a relatively simple structure and single function. The optical film fixed on it is not convenient to adjust the angle, and the irradiation angle of the light is not convenient to freely adjust, which affects the quality inspection efficiency. Summary of the Invention

[0004] The utility model provides an inspection table suitable for the appearance inspection of OLED optical films, and solves the problem in the prior art that the inspection rack is not convenient to adjust the observation angle of the optical film, resulting in affecting the quality inspection efficiency.

[0005] The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: an inspection platform suitable for OLED optical film appearance inspection, comprising a support platform and a positioning frame, characterized in that: the positioning frame is connected to the horizontal rotating axis of the support platform, the support platform is provided with a flip servo assembly which can drive the positioning frame to flip up and down around the rotating axis, the positioning frame is also provided with a screw rod and a guide rod parallel to each other, the screw rod and the guide rod are provided with a moving seat which cooperates with both at the same time, the moving seat is provided with a light source frame, the light source frame is provided with a plurality of light sources, the positioning frame is provided with a servo motor which is transmission-connected to the screw rod, and the inspection platform also includes a plurality of pressure strips which can produce a magnetic effect with the upper surface of the positioning frame.

[0006] The utility model can fix the OLED optical film on the upper surface of the positioning frame through the magnetic effect of the pressure strip and keep the film surface flat, and then control the flip servo assembly to drive the positioning frame to flip up and down, so that the positioning frame is flipped to a suitable observation angle, and then control the servo motor to drive the screw rod to rotate, thereby driving the light source on the moving seat to move from one side of the positioning frame to the other side at a uniform speed. The light source is located below the OLED optical film as a whole and continuously irradiates the OLED optical film so that the diffraction phenomenon of the coating in each area can be observed by the naked eye.

[0007] Furthermore, the light source frame is rotatably connected relative to the moving base, the moving base is provided with a steering gear, the steering gear is provided with a rudder, the eccentric end of the rudder is hinged with a connecting rod, and the other end of the connecting rod is hinged to the eccentric part of the light source frame. In this way, by controlling the steering gear to fine-tune, the direction of the light source frame can be fine-tuned, and the diffraction effect can be fine-tuned by changing the irradiation angle of the light source to achieve the best diffraction effect.

[0008] Furthermore, the pressure strip includes an aluminum alloy outer frame and a permanent magnet embedded in the aluminum alloy outer frame; at the same time, the positioning frame is a rectangular frame structure as a whole, and a flexible gasket is laid flat on its upper surface, and a ferromagnetic material is provided at the bottom of the flexible gasket. Permanent magnets are generally soft magnets, which can reduce the clamping force on the optical film when clamping and fixing the optical film, and with the flexible gasket, damage to the optical film can be avoided.

[0009] Therefore, the utility model has the following characteristics compared with the prior art: 1. The utility model drives the positioning frame to turn up and down by controlling the turning servo assembly, so that the positioning frame turns to a suitable observation angle, and then controls the servo motor to drive the lead screw to rotate, thereby driving the light source on the moving seat to move uniformly from one side of the positioning frame to the other side. The light source is entirely located below the OLED optical film and continuously irradiates the OLED optical film, so as to facilitate the naked eye to observe the diffraction phenomenon of each area coating. In this way, the whole detection process is simplified, which is beneficial to improving the detection efficiency; 2. By controlling the fine adjustment of the servo, the orientation of the light source holder can be finely adjusted, and the diffraction effect can be finely adjusted by changing the irradiation angle of the light source to achieve the best diffraction effect; 3. The OLED optical film is fixed on the upper surface of the positioning frame through the magnetic effect of the pressing strip, and the film surface is kept flat, which is convenient for fixing and avoids damaging the surface of the film material. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG. Figure 1 is a schematic structural diagram of the utility model;

[0011] FIG. Figure 2 is a schematic structural diagram of the pressing strip;

[0012] FIG. Figure 3 is a bottom view of the positioning frame;

[0013] FIG. Figure 4 is FIG. Figure 3 is an enlarged view of part A of FIG. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The technical solutions of the present utility model will be further specifically described below through embodiments and in conjunction with the drawings.

[0015] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0016] Embodiment 1: Refer to Figure 1 and Figure 3 , an inspection table suitable for the appearance inspection of OLED optical films, including a support table frame 100, a positioning frame 200 and four pressing strips 300. The pressing strip includes an aluminum alloy outer frame 310 and a soft magnet 320 embedded in the aluminum alloy outer frame (see Figure 2), the positioning frame is a rectangular frame structure as a whole, and a flexible gasket 210 is laid flat on its upper surface, the thickness of the flexible gasket is between 1 and 3 mm, and a ferromagnetic material is provided at the bottom of the flexible gasket; the positioning frame is connected to the horizontal rotating axis relative to the supporting frame, and the supporting frame is provided with a flip servo component 110 that can drive the positioning frame to flip up and down around the rotating axis, the flip servo component is a servo electric cylinder, the cylinder body of the servo electric cylinder is rotatably connected to the supporting frame, and the telescopic rod of the servo electric cylinder is rotatably connected to the positioning frame, and the flip servo components are provided with two and are symmetrically arranged with each other; the positioning frame is also provided with a screw rod 220 and a guide rod 230 that are parallel to each other, and the screw rod and the guide rod are provided with a moving seat 240 that cooperates with both at the same time, and the moving seat is provided with a light source frame 250, and the light source frame is provided with a plurality of LED light sources, and the positioning frame is provided with a servo motor 260 connected to the screw rod transmission.

[0017] In this embodiment, the OLED optical film can be fixed on the upper surface of the positioning frame through the magnetic effect of the pressure strip and the film surface can be kept flat. The positioning frame can then be flipped up and down by controlling the flip servo assembly to make the positioning frame flip to a suitable observation angle. The servo motor can then be controlled to drive the lead screw to rotate, thereby driving the light source on the moving seat to move from one side of the positioning frame to the other side at a uniform speed. The light source is located as a whole below the OLED optical film and continuously irradiates the OLED optical film so that the diffraction phenomenon of the coating in each area can be observed by the naked eye.

[0018] See Figure 1 and Figure 4 The light source frame is rotatably connected relative to the moving base, the moving base is provided with a steering gear 270, the steering gear is provided with a rudder 271, the eccentric end of the rudder is hinged with a connecting rod 272, and the other end of the connecting rod is hinged to the eccentric part of the light source frame. In this way, by controlling the steering gear to fine-tune, the direction of the light source frame can be fine-tuned, and the diffraction effect can be fine-tuned by changing the irradiation angle of the light source to achieve the best diffraction effect.

[0019] See Figure 1 An operation panel 280 is provided on the support stand or positioning frame. The operation panel is provided with buttons or knobs for controlling the operation of the flip servo assembly, the servo motor and the steering gear, and can also be a display screen with a touch screen function.

[0020] In order to facilitate the movement of this embodiment, a universal roller with a brake structure can also be installed at the bottom of the supporting frame.

[0021] It is obvious to those skilled in the art that the utility model can be changed in many ways, and such changes are not considered to be out of the scope of the utility model. All such modifications obvious to those skilled in the art will be included in the scope of the claims.

Claims

1. An inspection table applicable to the appearance inspection of an OLED optical film, comprising a support table frame and a positioning frame, characterized in that: The positioning frame is connected to the horizontal rotating axis of the support platform, and the support platform is provided with a flip servo assembly which can drive the positioning frame to flip up and down around the rotating axis. The positioning frame is also provided with a screw rod and a guide rod which are parallel to each other, and the screw rod and the guide rod are provided with a movable seat which cooperates with both of them at the same time, and the movable seat is provided with a light source frame, and the light source frame is provided with a plurality of light sources, and the positioning frame is provided with a servo motor which is transmission-connected to the screw rod, and the inspection table also includes a plurality of pressure strips which can produce a magnetic attraction effect with the upper surface of the positioning frame.

2. The inspection table applicable to the appearance inspection of the OLED optical film according to claim 1, characterized in that: The light source frame is rotatably connected relative to the moving seat. The moving seat is provided with a steering gear, and the steering gear is provided with a rudder bar. A connecting rod is hinged on the eccentric end of the rudder bar, and the other end of the connecting rod is hinged on the eccentric part of the light source frame.

3. The inspection table applicable to the appearance inspection of the OLED optical film according to claim 2, characterized in that: An operation panel is arranged on the supporting stand or the positioning frame, and buttons or knobs for controlling the operation of the flip servo assembly, the servo motor and the steering gear are arranged on the operation panel.

4. The inspection table applicable to the appearance inspection of the OLED optical film according to claim 1, characterized in that: The pressure strip comprises an aluminum alloy outer frame and a permanent magnet embedded in the aluminum alloy outer frame.

5. The inspection table applicable to the appearance inspection of the OLED optical film according to claim 4, characterized in that: The positioning frame is a rectangular frame structure as a whole, a flexible gasket is laid flat on the upper surface thereof, and a ferromagnetic material is provided at the bottom of the flexible gasket.

6. The inspection table applicable to the appearance inspection of the OLED optical film according to claim 1, characterized in that: The flip servo assembly is a servo electric cylinder, the cylinder body of the servo electric cylinder is rotatably connected to the support stand, the telescopic rod of the servo electric cylinder is rotatably connected to the positioning frame, and the flip servo assembly is provided with two and is symmetrically arranged.

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