Switchable polaroid defect detection device

Abstract

The utility model relates to a switchable polaroid defect detection device which comprises a detection light source assembly, a guide rail assembly, a circular polaroid eliminating assembly and a linear polaroid orthogonal assembly, and the circular polaroid eliminating assembly and the linear polaroid orthogonal assembly move on the guide rail assembly. And the circular polarizer eliminating assembly and the linear polarizer orthogonal assembly are alternately positioned on the detection light source assembly. According to the technical scheme, the linear polarizer orthogonal assembly can be adopted to inspect and screen conventional concave-convex points, indentations, scratches, scratches and other defects of the polarizer for the OLED, and the circular polarizer eliminating assembly can be adopted to inspect liquid crystal orthogonal bright spot defects in the polarizer for the OLED, so that the detection accuracy and efficiency are greatly improved.

Description

Technical Field

[0001] This application relates to the field of polarizer technology, specifically to a switchable polarizer defect detection device. Background Technology

[0002] As a core component of display devices, the quality of polarizers directly affects the optical imaging effect of the display. With the continuous advancement of display technology, polarizers have been widely used in various display fields, especially in the OLED display market, where they occupy a significant market share due to their high contrast advantage. However, OLED polarizers are prone to various defects during production and processing, such as foreign objects, pinch marks, and indentations. These defects require strict visual inspection after being cut into sheets to ensure the quality of the shipped products.

[0003] Currently, defect inspection of linear polarizers typically employs methods such as reflection mode, transmission, and direct-view cross-sectional inspection. These methods can effectively detect defects such as bumps, indentations, and scratches. However, OLED polarizers, due to their combination of 1 / 4λ wave plates and iodine-based polarizers, exhibit unique liquid crystal orthogonal bright spot defects, which existing methods struggle to detect effectively. Therefore, it is necessary to develop an innovative polarizer inspection fixture capable of accurately capturing and identifying liquid crystal orthogonal bright spot defects in OLED polarizers, thereby significantly improving inspection accuracy and efficiency. Summary of the Invention

[0004] This application aims to develop an efficient and accurate polarizer testing fixture to solve the difficult problems in the testing of polarizers for OLEDs.

[0005] To solve the above-mentioned technical problems, this application can be implemented through the following technical solutions:

[0006] This application provides a switchable polarizer defect detection device, including a detection light source assembly, a guide rail assembly disposed on the detection light source assembly, and a circular polarizer cancellation assembly and a linear polarizer orthogonal assembly disposed on the guide rail assembly. The circular polarizer cancellation assembly and the linear polarizer orthogonal assembly move on the guide rail assembly, so that the circular polarizer cancellation assembly and the linear polarizer orthogonal assembly are alternately located on the detection light source assembly. The polarizer for the OLED to be tested is located on the other side of the circular polarizer cancellation assembly or the linear polarizer orthogonal assembly, so that the light emitted by the detection light source assembly passes through the circular polarizer cancellation assembly or the linear polarizer orthogonal assembly and enters the polarizer for the OLED to be tested.

[0007] The circular polarizer de-polarization assembly comprises a first linear polarizing layer, a first adhesive layer, a 1 / 4λ liquid crystal compensation film layer, a second adhesive layer, and a first glass substrate, which are stacked sequentially. The first linear polarizing layer is disposed adjacent to the detection light source assembly. The angle between the optical axis of the first linear polarizing layer and the optical axis of the 1 / 4λ liquid crystal compensation film layer is 130° to 140°. The optical axis of the 1 / 4λ liquid crystal compensation film layer is perpendicular to the optical axis of the polarizer of the OLED to be tested.

[0008] The linear polarizer orthogonal assembly includes a second linear polarizing layer, a third adhesive layer, and a second glass substrate stacked sequentially, with the second linear polarizing layer disposed adjacent to the detection light source assembly.

[0009] As a further improvement of this application, the detection light source assembly includes a lamp source component, a fixing component, and a wiring component. The fixing component is used to fix the lamp source component, the wiring component, and the guide rail assembly, and the wiring component is used to electrically connect the lamp source component to a power source.

[0010] As a further improvement of this application, the fixing component is a rectangular container, the container includes a bottom plate, a side plate and a transparent cover plate, the size of the transparent cover plate is matched with the polarizer of the OLED to be tested, and the light source component includes a number of strip lights, the number of strip lights are arranged horizontally in parallel at equal intervals inside the container.

[0011] As a further improvement of this application, the spacing between some of the strip lights is 5cm to 10cm.

[0012] As a further improvement of this application, the number of strip lights is 3 to 5.

[0013] As a further improvement of this application, the guide rail assembly includes two parallel slide rails, a slider disposed on the slide rails and capable of reciprocating, the slide rails being fixed to the receiving box, the circular polarizer de-polarization assembly and the linear polarizer orthogonal assembly being mounted on the slider and reciprocating with the slider, so that the circular polarizer de-polarization assembly and the linear polarizer orthogonal assembly are alternately positioned on the detection light source assembly.

[0014] As a further improvement of this application, the extension direction of the slide rail is consistent with the extension direction of the strip light.

[0015] As a further improvement of this application, the thickness of the first adhesive layer and / or the second adhesive layer is 10 μm to 25 μm.

[0016] As a further improvement of this application, the first linear polarizing layer and / or the second linear polarizing layer are selected from dye-based or iodine-based polarizing films with a 1 / 4λ film.

[0017] As a further improvement of this application, the thickness of the circular polarizer decanting component is consistent with the thickness of the linear polarizer orthogonal component.

[0018] The beneficial effects of this application are as follows: This application provides a switchable polarizer defect detection device, which includes a detection light source assembly, a guide rail assembly disposed on the detection light source assembly, and a circular polarizer cancellation assembly and a linear polarizer orthogonal assembly disposed on the guide rail assembly. The circular polarizer cancellation assembly and the linear polarizer orthogonal assembly move on the guide rail assembly, so that the circular polarizer cancellation assembly and the linear polarizer orthogonal assembly alternately occupy the detection light source assembly. The technical solution of this application can not only use the linear polarizer orthogonal assembly to inspect and screen conventional defects such as bumps, indentations, scratches, and abrasions in OLED polarizers, but also use the circular polarizer cancellation assembly to inspect liquid crystal orthogonal bright spot defects in OLED polarizers, thereby greatly improving the detection accuracy and efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the switchable polarizer defect detection device of this application;

[0020] Figure 2 This is a schematic diagram of the circular polarizer decanting assembly of this application;

[0021] Figure 3 This is a schematic diagram of the structure of the orthogonal assembly of the linear polarizer of this application.

[0022] In the figure: 1. Detection light source assembly; 2. Circular polarizer cancellation assembly; 3. Linear polarizer orthogonal assembly; 4. Guide rail assembly; 11. Lamp source component; 12. Fixing component; 21. First linear polarizing layer; 22. 1 / 4λ liquid crystal compensation film layer; 23. First glass substrate; 31. Second linear polarizing layer; 32. Second glass substrate. Detailed Implementation

[0023] The present application will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present application, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of this application.

[0024] This application provides a switchable polarizer defect detection device, including a detection light source assembly 1, a guide rail assembly 4 disposed on the detection light source assembly 1, and a circular polarizer cancellation assembly 2 and a linear polarizer orthogonal assembly 3 disposed on the guide rail assembly 4. The circular polarizer cancellation assembly 2 and the linear polarizer orthogonal assembly 3 move on the guide rail assembly 4, so that the circular polarizer cancellation assembly 2 and the linear polarizer orthogonal assembly 3 are alternately located on the detection light source assembly 1. The polarizer for the OLED to be tested is located on the other side of the circular polarizer cancellation assembly 2 or the linear polarizer orthogonal assembly 3, so that the light emitted by the detection light source assembly 1 passes through the circular polarizer cancellation assembly 2 or the linear polarizer orthogonal assembly 3 and enters the polarizer for the OLED to be tested.

[0025] Wherein: the circular polarizer de-polarization assembly 2 includes a first linear polarizing layer 21, a first adhesive layer, a 1 / 4λ liquid crystal compensation film layer, a second adhesive layer and a first glass substrate 23 stacked in sequence. The first linear polarizing layer 21 is disposed adjacent to the detection light source assembly 1. The angle between the optical axis of the first linear polarizing layer 21 and the optical axis of the 1 / 4λ liquid crystal compensation film layer is 130° to 140°. The optical axis of the 1 / 4λ liquid crystal compensation film layer is perpendicular to the optical axis of the polarizer of the OLED to be tested.

[0026] The linear polarizer orthogonal assembly 3 includes a second linear polarizing layer 31, a third adhesive layer, and a second glass substrate 32 stacked sequentially, with the second linear polarizing layer 31 disposed adjacent to the detection light source assembly 1.

[0027] In an optional implementation, the detection light source assembly 1 includes a lamp source component 11, a fixing component 12, and a wiring component. The fixing component 12 is used to fix the lamp source component 11, the wiring component, and the guide rail assembly 4. The wiring component is used to connect the lamp source component 11 to a power source.

[0028] In an optional implementation, the fixing member 12 is a cuboid housing, which includes a base plate, side plates, and a transparent cover. The size of the transparent cover matches the polarizer for the OLED to be tested. The light source component 11 includes several strip lights (it should be noted that the length of the strip lights has no special requirements, as long as it matches the size of the housing), and the strip lights are arranged horizontally side by side at equal intervals inside the housing. Preferably, the number of strip lights is 3 to 5, and the spacing between the strip lights is 5 cm to 10 cm. The base plate or side plates can be made of iron, aluminum alloy, or plastic. Preferably, the guide rail assembly 4 includes two parallel slide rails and a slider that is mounted on the slide rails and can move back and forth. The slide rails are fixed to the housing. The circular polarizer cancellation component 2 and the linear polarizer orthogonal component 3 are mounted on the slider and move back and forth with the slider, so that the circular polarizer cancellation component 2 and the linear polarizer orthogonal component 3 are alternately positioned on the detection light source assembly 1. Preferably, the extension direction of the slide rail is consistent with the extension direction of the strip light.

[0029] In an optional embodiment, the fixing member 12 includes several vertical support rods, several horizontal support rods, and a transparent partition. The vertical and horizontal support rods form a cubic frame structure. The light source 11 includes several strip lights (it should be noted that the length of the strip lights has no special requirements, as long as it matches the size of the housing). The strip lights are arranged horizontally side by side at equal intervals on the frame structure. Preferably, the number of strip lights is 3 to 5, and the spacing between the strip lights is 5 cm to 10 cm. The material of the vertical support rods and / or the horizontal support rods can be iron, aluminum alloy, or plastic. Preferably, the number of vertical support rods is 4, and the number of horizontal support rods is 8. The guide rail assembly 4 includes two parallel sliders disposed on the frame structure and mounted on the slide rail. The circular polarizer de-polarization assembly 2 and the linear polarizer orthogonal assembly 3 are mounted on the sliders, so that the circular polarizer de-polarization assembly 2 and the linear polarizer orthogonal assembly 3 are alternately positioned on the detection light source assembly 1. Preferably, the extension direction of the slide rail is consistent with the extension direction of the strip light.

[0030] In an optional embodiment, the thickness of the first adhesive layer and / or the second adhesive layer is 10 μm to 25 μm. The adhesive forming the first adhesive layer and / or the second adhesive layer can be any one of OCA optical adhesive or methacrylic optical adhesive.

[0031] In an optional embodiment, the circular polarizer de-polarization assembly 2 includes a first linear polarizing layer 21, a first adhesive layer, a 1 / 4λ liquid crystal compensation film layer, a second adhesive layer, and a first glass substrate 23, which are sequentially stacked. The first glass substrate 23 is selected from any one of quartz glass, tempered glass, or soda-lime glass. The circular polarizer de-polarization assembly 2 used in this application has no special requirements on the thickness of the first glass substrate 23; economical and suitable materials are acceptable. Preferably, the thickness of the first glass substrate 23 is 2 mm. Preferably, the 1 / 4λ liquid crystal compensation film layer is selected from any one of a phase retardation film, a QWP-T optical film, or a QWP-TM optical film. The phase retardation film is manufactured by Zeon Corporation of Japan, and the QWP-T and QWP-TM optical films are manufactured by Fujifilm. More preferably, the in-plane lag axis of the phase retardation film is between 80 nm and 150 nm.

[0032] In an optional embodiment, the first linear polarizing layer 21 is selected from conventional dye-based or iodine-based polarizing films with a 1 / 4λ film. Preferably, the dye-based or iodine-based polarizing film includes a protective film layer, an upper protective film layer, an upper adhesive layer, a polarizing film layer, a lower adhesive layer, and a lower protective film layer stacked sequentially. More preferably, the protective film layer is a PET (polyethylene terephthalate) film layer or an AG (anti-glare) film layer, and the function of the protective film layer is to protect the linear polarizing layer from scratches and other damage. The upper protective film is a TAC (cellulose triacetate) film layer, the polarizing film layer is a PVA (polyvinyl alcohol) film layer, and the lower protective film layer is a TAC (cellulose triacetate) film layer. The upper adhesive layer and / or the lower adhesive layer are prepared by an adhesive based on water-based glue, UV glue, and methacrylic acid. Preferably, when the upper adhesive layer and / or the lower adhesive layer are prepared from an adhesive with methacrylic acid as the main component, the thickness of the upper adhesive layer and / or the lower adhesive layer is 5 μm to 10 μm.

[0033] In an optional embodiment, the linear polarizer orthogonal assembly 3 includes a second linear polarizing layer 31, a third adhesive layer, and a second glass substrate 32 stacked sequentially. The second glass substrate 32 is selected from any one of quartz glass, tempered glass, or soda-lime glass. The circular polarizer de-polarizing assembly 2 used in this application has no special requirements on the thickness of the second glass substrate 32; economical and suitable materials are acceptable. Preferably, the thickness of the second glass substrate 32 is 2 mm. The third adhesive layer is prepared from any one of OCA optical adhesive or methacrylic optical adhesive.

[0034] In an optional implementation, the second linear polarizing layer 31 is selected from conventional dye-based or iodine-based polarizing films with a 1 / 4λ film. The structural design of the second linear polarizing layer 31 is based on the above discussion of the structural design of the first linear polarizing layer 21, and will not be repeated here. Preferably, the thickness of the circular polarizer decanting component 2 is consistent with the thickness of the linear polarizer orthogonal component 3.

[0035] The working principle of the switchable polarizer defect detection device of this application is as follows:

[0036] When the polarizer of the OLED to be tested is inspected for defects such as bumps, indentations, scratches, and abrasions, the linear polarizer orthogonal assembly 3 is moved onto the detection light source assembly 1. The light emitted by the detection light source assembly 1 passes through the linear polarizer orthogonal assembly 3 and the polarizer of the OLED to be tested in sequence.

[0037] When inspecting the polarizer of the OLED under test for liquid crystal orthogonal bright spot defects, the circular polarizer cancellation component 2 is moved onto the detection light source component 1. The light emitted by the detection light source component 1 passes through the circular polarizer cancellation component 2 and the polarizer of the OLED under test in sequence. The light path cannot pass through the polarizer of the OLED under test, forming a closed path and appearing dark. If there is a defect in the liquid crystal of the polarizer of the OLED under test, a bright spot will be observed. This allows the liquid crystal defect of the polarizer of the OLED under test to be displayed.

[0038] It should be noted that the above description is only for explaining the preferred embodiments of this application and is not intended to limit this application in any way. Therefore, any modifications or changes made to this application under the same inventive spirit should still be included within the scope of protection intended by this application.

Claims

1. A switchable polarizer defect detection device, characterized in that, The device includes a detection light source assembly, a guide rail assembly disposed on the detection light source assembly, and a circular polarizer cancellation assembly and a linear polarizer orthogonal assembly disposed on the guide rail assembly. The circular polarizer cancellation assembly and the linear polarizer orthogonal assembly move on the guide rail assembly, so that the circular polarizer cancellation assembly and the linear polarizer orthogonal assembly are alternately located on the detection light source assembly. The polarizer for the OLED to be tested is located on the other side of the circular polarizer cancellation assembly or the linear polarizer orthogonal assembly, so that the light emitted by the detection light source assembly passes through the circular polarizer cancellation assembly or the linear polarizer orthogonal assembly and enters the polarizer for the OLED to be tested. The circular polarizer de-polarization assembly comprises a first linear polarizing layer, a first adhesive layer, a 1 / 4λ liquid crystal compensation film layer, a second adhesive layer, and a first glass substrate, which are stacked sequentially. The first linear polarizing layer is disposed adjacent to the detection light source assembly. The angle between the optical axis of the first linear polarizing layer and the optical axis of the 1 / 4λ liquid crystal compensation film layer is 130° to 140°. The optical axis of the 1 / 4λ liquid crystal compensation film layer is perpendicular to the optical axis of the polarizer of the OLED to be tested. The linear polarizer orthogonal assembly includes a second linear polarizing layer, a third adhesive layer, and a second glass substrate stacked sequentially, with the second linear polarizing layer disposed adjacent to the detection light source assembly.

2. The switchable polarizer defect detection device according to claim 1, characterized in that, The detection light source assembly includes a lamp source component, a fixing component, and a wiring component. The fixing component is used to fix the lamp source component, the wiring component, and the guide rail assembly. The wiring component is used to connect the lamp source component to a power source.

3. The switchable polarizer defect detection device according to claim 2, characterized in that, The fixing component is a rectangular container, which includes a bottom plate, side plates and a transparent cover plate. The size of the transparent cover plate matches the polarizer of the OLED to be tested. The light source component includes several strip lights, which are arranged horizontally in parallel at equal intervals inside the container.

4. The switchable polarizer defect detection device according to claim 3, characterized in that, The spacing between several of the strip lights is 5cm to 10cm.

5. The switchable polarizer defect detection device according to claim 4, characterized in that, The number of strip lights is 3 to 5.

6. The switchable polarizer defect detection device according to claim 3, characterized in that, The guide rail assembly includes two parallel slide rails, a slider mounted on the slide rails and capable of reciprocating, the slide rails being fixed to the receiving box, the circular polarizer de-polarization assembly and the linear polarizer orthogonal assembly being mounted on the slider and reciprocating with the slider, so that the circular polarizer de-polarization assembly and the linear polarizer orthogonal assembly are alternately positioned on the detection light source assembly.

7. The switchable polarizer defect detection device according to claim 6, characterized in that, The extension direction of the slide rail is consistent with the extension direction of the strip light.

8. The switchable polarizer defect detection device according to claim 1, characterized in that, The thickness of the first adhesive layer and / or the second adhesive layer is 10 μm to 25 μm.

9. The switchable polarizer defect detection device according to claim 1, characterized in that, The first linear polarizing layer and / or the second linear polarizing layer are selected from dye-based or iodine-based polarizing films with a 1 / 4λ film.

10. The switchable polarizer defect detection device according to claim 1, characterized in that, The thickness of the circular polarizer de-polarization assembly is consistent with the thickness of the linear polarizer orthogonal assembly.

Images