Circular polarizer for streaming media screen of vehicle-mounted rearview mirror

Abstract

The utility model provides a circular polarizer for a vehicle-mounted rearview mirror streaming media screen, which sequentially comprises a first outer protective film layer, a first inner protective layer, a second inner protective layer, a third inner protective layer, a fourth inner protective layer, a polarizer layer, a fifth inner protective layer, a sixth inner protective layer and a seventh inner protective layer from top to bottom, the included angles between the optical axis angles of the first inner protection layer, the second inner protection layer and the third inner protection layer and the absorption axis angle of the polarized photon layer are sequentially reduced, the compensation value of the first inner protection layer is 1 / 2 of the compensation value of the second inner protection layer, and the compensation value of the second inner protection layer is the same as the compensation value of the third inner protection layer; the compensation value of the sixth inner protection layer is between the compensation value of the first inner protection layer and the compensation value of the second inner protection layer, and the compensation value of the seventh inner protection layer is smaller than the compensation value of the first inner protection layer. By adopting the technical scheme of the utility model, the problem of chromatic aberration is improved, and meanwhile, the contrast ratio can be obviously improved due to the overlapped OLED design.

Description

Technical Field

[0001] The utility model relates to a polarizer, in particular to a circular polarizer for a streaming media screen of a vehicle-mounted rearview mirror. Background Technique

[0002] Most of the vehicle-mounted display screens are in the IPS display mode. The upper polarizer is designed with angles of 90 degrees or 0 degrees in the horizontal screen respectively, and very few parts are OLED screens with the polarizer designed at 45 or 135°. When driving, there are many scenarios where polarized sunglasses are used, especially in the driver's seat. The absorption axis direction of the polarized sunglasses is 90 degrees in the vertical (horizontal screen) direction. In the above three angle situations, when observed from the front view, in the horizontal screen of 0 degrees, a black state will occur, and the darkness decreases significantly at 45 or 135°. Although the horizontal screen of 90 degrees can be seen clearly, when observed at an oblique angle, there will also be a significant decrease in darkness. For this reason, one layer of the protective layer on the upper polarizer is replaced or a 1 / 4 wave plate is externally attached, forming an angle of 45° or 135° with the absorption axis of the polarizer. The outgoing light is circularly polarized light. At this time, the sunglasses can be viewed at any angle, but when the screen is deflected, there will be a color difference situation. For example, the viewing angles of the left and right rearview mirror streaming media screens for the driving position are about 15 degrees and 75°, so when designing and developing the screen, the problem of the polarizer angle needs to be fully considered.

[0003] Currently, for vehicle-mounted display screens, when dealing with polarized sunglasses, there may be a situation of brightness decrease. One layer of the protective layer on the upper polarizer is replaced or a 1 / 4 wave plate is externally attached, forming an angle of 45° or 135° with the absorption axis of the polarizer. The outgoing light is circularly polarized light. At this time, the polarized sunglasses can be viewed at any angle and the brightness decrease is not obvious, but when the screen is deflected, such as the viewing angles of the left and right rearview mirror streaming media screens for the driving position are about 15 degrees and 75°, there will be a color difference situation.

[0004] In summary, compared with vehicle-mounted entertainment screens, the electronic rearview mirror streaming media screen involves safety factors, that is, the screen needs to highly restore the actual situation of things behind the vehicle. When it is required to be used with polarized sunglasses, the screen should present low color difference and high contrast. For polarized sunglasses, it also needs to meet the requirements of low color difference and high contrast, but the existing polarizers cannot meet the requirements. Summary of the Utility Model

[0005] In view of the above technical problems, the utility model discloses a circular polarizer for a vehicle-mounted rearview mirror streaming media screen, which meets the requirements of low color difference and high contrast.

[0006] For this, the technical solution of the utility model is as follows:

[0007] A circular polarizer for a streaming media screen of a vehicle-mounted rearview mirror, which sequentially includes a first outer protective film layer, a first inner protective layer, a second inner protective layer, a third inner protective layer, a fourth inner protective layer, a polarizer layer, a fifth inner protective layer, a sixth inner protective layer, and a seventh inner protective layer from top to bottom. The included angles between the optical axis angles of the first inner protective layer, the second inner protective layer, and the third inner protective layer and the absorption axis angle of the polarizer layer decrease in sequence. The compensation value of the first inner protective layer is 1 / 2 of the compensation value of the second inner protective layer, and the compensation values of the second inner protective layer and the third inner protective layer are the same. The compensation value of the sixth inner protective layer is between the compensation values of the first inner protective layer and the second inner protective layer, and the compensation value of the seventh inner protective layer is smaller than the compensation value of the first inner protective layer.

[0008] Adopting this technical solution, by setting inner protective layers with different compensation values, the color difference situation during the application of polarized sunglasses is improved. At the same time, by superimposing OLED, the contrast can be significantly enhanced. Further, the monomer transmittance of the material of the polarizer layer is 42% ± 2%, and the degree of polarization is ≥ 99.9%.

[0009] As a further improvement of the present invention, the compensation value of the first inner protective layer is 130 - 145 nm. Further, the compensation value of the first inner protective layer is 137 nm, and the compensation values of the second inner protective layer and the third inner protective layer are 274 nm.

[0010] As a further improvement of the present invention, the included angle between the optical axis angle of the first inner protective layer and the absorption axis angle of the polarizer layer is 90° - 110°, the included angle between the optical axis angle of the second inner protective layer and the absorption axis angle of the polarizer layer is 30° - 40°, and the included angle between the optical axis angle of the third inner protective layer and the absorption axis angle of the polarizer layer is 5° - 8°. Further, the included angle between the optical axis angle of the first inner protective layer and the absorption axis angle of the polarizer layer is 100.4°, the included angle between the optical axis angle of the second inner protective layer and the absorption axis angle of the polarizer layer is 34.5°, and the included angle between the optical axis angle of the third inner protective layer and the absorption axis angle of the polarizer layer is 6.9°.

[0011] As a further improvement of the present invention, the compensation value of the sixth inner protective layer is 160 - 175 nm, and the compensation value of the seventh inner protective layer is 110 - 120 nm. Further, the compensation value of the sixth inner protective layer is 168 nm, and the compensation value of the seventh inner protective layer is 114 nm.

[0012] As a further improvement of the present utility model, adjacent layers among the outer protective film, the first inner protective layer, the second inner protective layer, the third inner protective layer, the fourth inner protective layer, the polarizer layer, the fifth inner protective layer, the sixth inner protective layer, and the seventh inner protective layer are bonded through an adhesive layer, and the material of the adhesive layer is at least one of acrylic resin, polybutylene terephthalate, polyvinyl alcohol, acrylic resin, polycarbonate, and polyamide. Further, the thickness of the adhesive layer is 10 nm to 240 μm.

[0013] As a further improvement of the present utility model, the materials of the first inner protective layer, the second inner protective layer, the third inner protective layer, the fourth inner protective layer, the fifth inner protective layer, the sixth inner protective layer, and the seventh inner protective layer are at least one of triacetate cellulose, cycloolefin copolymer, polyethylene terephthalate, acrylic resin, polycarbonate, polyamide, and liquid crystal. Further, the thicknesses of the first inner protective layer, the second inner protective layer, the third inner protective layer, the fourth inner protective layer, the fifth inner protective layer, the sixth inner protective layer, and the seventh inner protective layer are 1 to 600 μm.

[0014] As a further improvement of the present utility model, a second outer protective film layer is provided on the surface of the seventh inner protective layer, and the seventh inner protective layer and the second outer protective film layer are connected through a pressure-sensitive adhesive layer.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] By adopting the technical solution of the present utility model and designing the compensation film, the problem of color difference during the application of polarized sunglasses is improved. At the same time, with the superimposed OLED design, the contrast can be significantly improved, highly restoring the actual situation of the things behind the streaming media screen of the electronic rearview mirror, and greatly enhancing the driving control safety. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of a circular polarizer for a streaming media screen of a vehicle-mounted rearview mirror according to an embodiment of the present utility model.

[0018] Reference numerals include:

[0019] 1 - First outer protective film layer, 2 - First inner protective layer, 3 - Second inner protective layer, 4 - Third inner protective layer, 5 - Fourth inner protective layer, 6 - Polarizer layer, 7 - Fifth inner protective layer, 8 - Sixth inner protective layer, 9 - Seventh inner protective layer, 10 - Second outer protective film layer;

[0020] 11 - Outer protective film adhesive layer, 12 - Adhesive layer, 13 - Pressure-sensitive adhesive layer. Detailed Embodiments

[0021] The following further describes in detail the preferred embodiments of the present utility model with reference to the drawings.

[0022] As shown Figure 1 in the figure, a circular polarizer for a streaming media screen of a vehicle-mounted rearview mirror includes, from top to bottom, a first outer protective film layer 1, a first inner protective layer 2, a second inner protective layer 3, a third inner protective layer 4, a fourth inner protective layer 5, a polarizer layer 6, a fifth inner protective layer 7, a sixth inner protective layer 8, and a seventh inner protective layer 9. A second outer protective film layer 10 is provided on the surface of the seventh inner protective layer 9, and the seventh inner protective layer 9 and the second outer protective film layer 10 are connected through a pressure-sensitive adhesive layer 13.

[0023] The included angles between the optical axis angles of the first inner protective layer 2, the second inner protective layer 3, and the third inner protective layer 4 and the absorption axis angle of the polarizer layer 6 decrease in sequence. The compensation value of the first inner protective layer 2 is 1 / 2 of the compensation value of the second inner protective layer 3, and the compensation value of the second inner protective layer 3 is the same as the compensation value of the third inner protective layer 4; the compensation value of the sixth inner protective layer 8 is between the compensation values of the first inner protective layer 2 and the second inner protective layer, and the compensation value of the seventh inner protective layer 9 is smaller than the compensation value of the first inner protective layer 2. Specifically, the compensation value of the first inner protective layer 2 is 137 nm, and the compensation values of the second inner protective layer 3 and the third inner protective layer 4 are 274 nm.

[0024] The included angle between the optical axis angle of the first inner protective layer 2 and the absorption axis angle of the polarizer layer 6 is 100.4°, the included angle between the optical axis angle of the second inner protective layer 3 and the absorption axis angle of the polarizer layer 6 is 34.5°, and the included angle between the optical axis angle of the third inner protective layer 4 and the absorption axis angle of the polarizer layer 6 is 6.9°. Here, after the first inner protective layer 2, the second inner protective layer 3, and the third inner protective layer 4 are rotated, they are attached to the polarizer layer 6.

[0025] The compensation value of the sixth inner protective layer 8 is 168 nm, and the compensation value of the seventh inner protective layer 9 is 114 nm.

[0026] The adjacent layers among the outer protective film, the first inner protective layer 2, the second inner protective layer 3, the third inner protective layer 4, the fourth inner protective layer 5, the polarizer layer 6, the fifth inner protective layer 7, the sixth inner protective layer 8, and the seventh inner protective layer 9 are bonded through an adhesive layer 12, and the material of the adhesive layer is at least one of acrylic resin, polybutylene terephthalate, polyvinyl alcohol, acrylic resin, polycarbonate, and polyamide; the thickness of the adhesive layer is 10 nm to 240 μm.

[0027] The materials of the first inner protective layer 2, the second inner protective layer 3, the third inner protective layer 4, the fourth inner protective layer 5, the fifth inner protective layer 7, the sixth inner protective layer 8, and the seventh inner protective layer 9 are at least one of triacetate, cycloolefin copolymer, polyethylene terephthalate, acrylic resin, polycarbonate, polyamide, and liquid crystal; the thicknesses of the first inner protective layer 2, the second inner protective layer 3, the third inner protective layer 4, the fourth inner protective layer 5, the fifth inner protective layer 7, the sixth inner protective layer 8, and the seventh inner protective layer 9 are 1 to 250 μm.

[0028] The first outer protective film layer 1 is connected to the first inner protective layer 2 through the outer protective film adhesive layer 11. Further, the surface impedance of the outer protective film adhesive layer 11 ≥ 10 13 Ω, and the peel strength between the outer protective film adhesive layer 11 and the first inner protective layer 2 is less than 0.098 N / 25 mm.

[0029] In this embodiment, the first outer protective film layer 1 functions as an outer protection layer, and the surface impedance value of the contact surface with air ≤ 10 11 (Ω); the fourth inner protective layer 5 mainly protects the polarizer layer 6 to prevent the polarizer layer 6 from losing polarization; the polarizer layer 6 uses a polarizing film with high transmittance of the prior art; the fifth inner protective layer 7 mainly protects the polarizer layer 6 to prevent the polarizer layer 6 from losing polarization; the pressure-sensitive adhesive layer 13 functions to bond the panel.

[0030] The first inner protective layer 2, the second inner protective layer 3, and the third inner protective layer 4 function to prevent the sunglasses from closing, and within the range of a 360° viewing angle, a low color difference can be ensured; the second outer protective film layer 10 functions as an outer protection layer, which is peeled off during use, and the pressure-sensitive adhesive layer 13 is used to bond with the liquid crystal panel.

[0031] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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 thus should not be construed as a limitation to the present invention.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0033] In the present utility model, unless otherwise clearly stipulated and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] The above-described specific embodiments are the preferred embodiments of the present utility model, and do not limit the specific implementation scope of the present utility model. The scope of the present utility model includes but is not limited to this specific embodiment. Any equivalent changes made according to the shape and structure of the present utility model are within the protection scope of the present utility model.

Claims

1. A circular polarizer for a streaming media screen of a vehicle-mounted rearview mirror, characterized in that: It sequentially includes a first outer protective film layer, a first inner protective layer, a second inner protective layer, a third inner protective layer, a fourth inner protective layer, a polarizer layer, a fifth inner protective layer, a sixth inner protective layer, and a seventh inner protective layer from top to bottom. The included angles between the optical axis angles of the first inner protective layer, the second inner protective layer, and the third inner protective layer and the absorption axis angle of the polarizer layer decrease in sequence. The compensation value of the first inner protective layer is 1 / 2 of the compensation value of the second inner protective layer, and the compensation value of the second inner protective layer is the same as that of the third inner protective layer; the compensation value of the sixth inner protective layer is between the compensation values of the first inner protective layer and the second inner protective layer, and the compensation value of the seventh inner protective layer is less than the compensation value of the first inner protective layer.

2. The circular polarizer for the streaming media screen of the vehicle-mounted rearview mirror according to claim 1, characterized in that: The compensation value of the first inner protective layer is 130 - 145 nm.

3. The circular polarizer for the streaming media screen of the vehicle-mounted rearview mirror according to claim 2, wherein: The compensation value of the first inner protective layer is 137 nm, and the compensation values of the second inner protective layer and the third inner protective layer are 274 nm.

4. The circular polarizer for the streaming media screen of the vehicle-mounted rearview mirror according to claim 1, characterized in that: The included angle between the optical axis angle of the first inner protective layer and the absorption axis angle of the polarizer layer is 90° - 110°, the included angle between the optical axis angle of the second inner protective layer and the absorption axis angle of the polarizer layer is 30° - 40°, and the included angle between the optical axis angle of the third inner protective layer and the absorption axis angle of the polarizer layer is 5° - 8°.

5. The circular polarizer for the streaming media screen of the vehicle-mounted rearview mirror according to claim 4, characterized in that: The included angle between the optical axis angle of the first inner protective layer and the absorption axis angle of the polarizer layer is 100.4°, the included angle between the optical axis angle of the second inner protective layer and the absorption axis angle of the polarizer layer is 34.5°, and the included angle between the optical axis angle of the third inner protective layer and the absorption axis angle of the polarizer layer is 6.9°.

6. The circular polarizer for the in-vehicle rearview mirror streaming media screen according to claim 1, wherein: The compensation value of the sixth inner protective layer is 160 - 175 nm, and the compensation value of the seventh inner protective layer is 110 - 120 nm.

7. The circular polarizer for the streaming media screen of the vehicle-mounted rearview mirror according to claim 6, wherein: The compensation value of the sixth inner protective layer is 168 nm, and the compensation value of the seventh inner protective layer is 114 nm.

8. The circular polarizer for the streaming media screen of the vehicle-mounted rearview mirror according to claim 1, wherein: The adjacent layers among the outer protective film, the first inner protective layer, the second inner protective layer, the third inner protective layer, the fourth inner protective layer, the polarizer layer, the fifth inner protective layer, the sixth inner protective layer, and the seventh inner protective layer are bonded through an adhesive layer. The material of the adhesive layer is at least one of acrylic resin, polybutylene terephthalate, polyvinyl alcohol, acrylic resin, polycarbonate, and polyamide; the thickness of the adhesive layer is 10 nm - 240 μm.

9. The circular polarizer for the streaming media screen of the vehicle-mounted rearview mirror according to claim 8, wherein: The materials of the first inner protective layer, the second inner protective layer, the third inner protective layer, the fourth inner protective layer, the fifth inner protective layer, the sixth inner protective layer, and the seventh inner protective layer are at least one of triacetyl cellulose, cycloolefin copolymer, polyethylene terephthalate, acrylic resin, polycarbonate, polyamide, and liquid crystal; the thicknesses of the first inner protective layer, the second inner protective layer, the third inner protective layer, the fourth inner protective layer, the fifth inner protective layer, the sixth inner protective layer, and the seventh inner protective layer are 1 - 600 μm.

10. The circular polarizer for the in-vehicle rearview mirror streaming media screen according to any one of claims 1 to 9, characterized in that: A second outer protective film layer is provided on the surface of the seventh inner protective layer, and the seventh inner protective layer and the second outer protective film layer are connected through a pressure - sensitive adhesive layer.

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