CN114428420A

CN114428420A - Rearview mirror, manufacturing method of rearview mirror and vehicle

Info

Publication number: CN114428420A
Application number: CN202210190504.9A
Authority: CN
Inventors: 李文波; 黄火兴
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Technology Development Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Technology Development Co Ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-05-03

Abstract

The application provides a rearview mirror, a preparation method thereof and a vehicle. Wherein, the rear-view mirror includes: a display module; the cover plate is arranged on one side of the light emitting direction of the display module; a reflecting layer is arranged at the edge area of one side of the cover plate close to the display module; the orthographic projection of the reflecting layer on the display module is at least partially overlapped with the orthographic projection of the edge of the cover plate on the display module; the mirror surface component is arranged on one side, facing the display module, of the cover plate, and the mirror surface component is configured to transmit light rays in the first polarization direction and reflect light rays in the second polarization direction. The display module is characterized in that a cover plate is arranged, and a reflecting layer is arranged on the edge of one side, close to the display module, of the cover plate; the apron orientation one side of display module assembly sets up the light of passing through first polarization direction, and the mirror surface subassembly of the light of reflection second polarization direction can improve the mirror surface of rear-view mirror under the mirror surface state and account for the ratio, can also effectively improve the yields of rear-view mirror preparation.

Description

Rearview mirror, manufacturing method of rearview mirror and vehicle

Technical Field

The application relates to the technical field of display, in particular to a rearview mirror, a manufacturing method of the rearview mirror and a vehicle.

Background

The rearview mirrors are tools for a driver sitting on a cab seat to directly acquire external information such as the rear, side and lower parts of the automobile. The rearview mirror plays an important role in driving safety. The streaming media rearview mirror can simultaneously realize the functions of streaming media and a conventional mirror surface rearview mirror.

The prior streaming media rearview mirror has the problems of low yield and the like.

Disclosure of Invention

In view of this, the present application aims to provide a rearview mirror, a manufacturing method of the rearview mirror and a vehicle.

In view of the above, the present application provides a rearview mirror comprising:

a display module;

the cover plate is arranged on one side of the light emitting direction of the display module; a reflecting layer is arranged at the edge area of one side of the cover plate close to the display module; the orthographic projection of the reflecting layer on the display module is at least partially overlapped with the orthographic projection of the edge area of the cover plate on the display module;

the mirror surface component is arranged on one side, facing the display module, of the cover plate and is configured to transmit light rays in a first polarization direction and reflect light rays in a second polarization direction.

In some of these embodiments, the cover plate further comprises: the light shielding layer is arranged on one side, close to the display module, of the reflecting layer; the orthographic projection of the light shielding layer on the cover plate is overlapped with the orthographic projection of the reflecting layer on the cover plate.

In some of these embodiments, the cover plate further comprises: the bonding layer is arranged on one side, close to the display module, of the reflection layer; an orthographic projection of the bonding layer on the cover plate overlaps with an orthographic projection of the reflective layer on the cover plate.

In some of these embodiments, the side of the cover plate has a hem.

In some embodiments, the mirror assembly includes a transflective film, the display module is a liquid crystal display module, and the liquid crystal display module includes a first substrate, a liquid crystal layer, and a second substrate sequentially stacked along a light-emitting direction; the transflective film is disposed between the reflective layer and the second substrate.

In some embodiments, the transflective film is a reflective polarizer RPM film disposed on the cover plate and located on a side of the reflective layer close to the second substrate.

In some embodiments, the liquid crystal display module further comprises a polarizer, and the polarizer is arranged on one side of the second substrate close to the cover plate; the transmission axis of the polarizer is the same as that of the RPM film of the reflective polarizer.

In some of the embodiments, the material of the transflective film is metal; the semi-transparent semi-reflective film is arranged on the second substrate and is positioned on one side, far away from the cover plate, of the second substrate.

In some embodiments, the transflective film is disposed on the second substrate and located on a side of the second substrate close to the cover plate.

In some embodiments, the transflective film is reused as a polarizer of the display module.

In some of these embodiments, the mirror assembly comprises a mirror switching screen and a transflective film; the semi-transparent semi-reflective film is arranged on the light emergent side of the display module; the mirror face switching screen is arranged on one side of the semi-transparent semi-reflective film close to the cover plate; the mirror switching screen is configured to switch between a highly transmissive state and a highly reflective state; and can determine whether to be in an anti-glare mode or a non-anti-glare mode according to the first light ray and the second light ray; the first light is incident light from the light emergent side of the display module; the second light is incident light from the backlight side of the display module.

In some embodiments, the reflective layer is provided with a first through hole, the light-shielding layer is provided with a second through hole, and the bonding layer is provided with a light-transmitting area; the first through hole and the second through hole are arranged corresponding to the light-transmitting area, so that the first light and the second light penetrate through the light-transmitting area.

In some of these embodiments, the light-transmissive region is coated with a white light-transmissive material.

Embodiments of the present application also provide a vehicle including a rearview mirror as in any one of the preceding claims.

The embodiment of the application also provides a preparation method of the rearview mirror, which comprises the following steps:

forming a display module;

forming a cover plate on one side of the light emitting direction of the display module; a reflecting layer is arranged at the edge area of one side of the cover plate close to the display module; the orthographic projection of the reflecting layer on the display module is at least partially overlapped with the orthographic projection of the edge area of the cover plate on the display module;

the side, facing the display module, of the cover plate is provided with a mirror assembly, and the mirror assembly is configured to transmit light rays in a first polarization direction and reflect light rays in a second polarization direction.

From the above, according to the rearview mirror, the manufacturing method of the rearview mirror and the vehicle, the cover plate is arranged, and the reflecting layer is arranged at the edge area of one side, close to the display module, of the cover plate; set up the light that passes through first polarization direction between apron and display module assembly, the mirror surface subassembly of the light of reflection second polarization direction can improve the mirror surface of rear-view mirror under the mirror surface state and account for the ratio, can effectively improve the yields of rear-view mirror preparation simultaneously.

Drawings

In order to more clearly illustrate the technical solutions in the present application or the related art, the drawings needed to be used in the description of the embodiments or the related art will be briefly introduced below, and it is obvious that the drawings in the following description are only embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of an exemplary rearview mirror in accordance with an embodiment of the present disclosure;

FIG. 2 is a front view of an exemplary cover plate of an embodiment of the present application;

FIG. 3a is a side view of an exemplary cover plate of an embodiment of the present application;

FIG. 3b is an enlarged view at A in FIG. 3 a;

FIG. 4 is a schematic diagram of an exemplary substrate shape of an embodiment of the present application;

FIG. 5 is a schematic diagram of an exemplary reflective layer of an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a light-shielding layer according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural view of an exemplary bonding layer of an embodiment of the present application;

fig. 8 is a schematic structural diagram of an exemplary display module according to an embodiment of the present disclosure;

fig. 9a is a schematic view illustrating an exemplary metal mesh reflective polarizer disposed inside a second substrate and a display module closed according to an embodiment of the disclosure;

fig. 9b is a schematic view illustrating an exemplary metal mesh reflective polarizer disposed on an inner side of the second substrate and a display module being turned on according to an embodiment of the disclosure;

FIG. 10a is a schematic diagram of an exemplary RPM film disposed on an outer side of a second substrate and showing a module turned off according to an embodiment of the disclosure;

fig. 10b is a schematic diagram illustrating an exemplary RPM film disposed outside the second substrate and showing that the display module is turned on according to an embodiment of the present disclosure;

fig. 11a is a schematic view illustrating an exemplary transflective film disposed outside a second substrate and a display module being closed according to an embodiment of the disclosure;

fig. 11b is a schematic view illustrating that the transflective film is disposed on the outer side of the second substrate and the display module is turned on according to the embodiment of the disclosure;

FIG. 12a is a schematic view of an exemplary transflective film disposed on an inner side of a cover plate and a display module closed according to an embodiment of the disclosure;

FIG. 12b is a schematic view of the transflective film disposed on the inner side of the cover plate and showing the display module being opened according to the embodiment of the present disclosure;

FIG. 13a is a schematic view of an exemplary rearview mirror with a first polarizer according to an embodiment of the disclosure, showing a display module closed;

FIG. 13b is a schematic view of an exemplary rearview mirror with a first polarizer according to an embodiment of the disclosure, showing a display module turned on;

FIG. 14 is a schematic diagram of the operation mechanism of the transflective film according to the embodiment of the present application;

FIG. 15 is a schematic diagram illustrating a relationship between transmission axes of an exemplary first polarizer and a transflective film according to an embodiment of the present disclosure;

FIG. 16a is a simplified schematic view of a rearview mirror incorporating a mirror switching screen in accordance with an embodiment of the present application;

FIG. 16b is a further block diagram of a rearview mirror incorporating a mirror switching screen in accordance with an embodiment of the present application;

FIG. 17 is a schematic view of an exemplary mirror switching screen of an embodiment of the present application;

fig. 18 is a flow chart of an exemplary method of manufacturing a rearview mirror in accordance with an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to the accompanying drawings in combination with specific embodiments.

It should be noted that technical terms or scientific terms used in the embodiments of the present application should have a general meaning as understood by those having ordinary skill in the art to which the present application belongs, unless otherwise defined. The use of "first," "second," and similar terms in the embodiments of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Fig. 1 shows a schematic structural view of an exemplary rear view mirror according to an embodiment of the present application.

As shown in fig. 1, the rearview mirror provided in the embodiment of the present application includes a display module 10, a cover plate 50 and a mirror assembly 60. The cover plate 50 is disposed on the light emitting side of the display module 10. The mirror assembly 60 may be disposed on a side of the cover plate 50 facing the display module 10. A reflecting layer is arranged at the edge area of one side of the cover plate close to the display module; the orthographic projection of the reflecting layer on the display module is at least partially overlapped with the orthographic projection of the edge area of the cover plate on the display module; the mirror assembly 60 is configured to transmit light of a first polarization direction and reflect light of a second polarization direction. The side of the cover plate adjacent to the mirror assembly 60 is provided with a reflective layer 52.

In this way, according to the scheme of the embodiment of the application, by arranging the cover plate 50 and the display module 10, the mirror surface assembly 60 which transmits the light in the first polarization direction and reflects the light in the second polarization direction is arranged on one side of the cover plate facing the display module, and the reflective layer 52 is arranged on the edge of one side of the cover plate close to the display module; the mirror surface proportion of the rearview mirror in the mirror surface state can be improved, and the process yield and the process precision can be ensured more easily by arranging the reflecting layer (for example, performing reflective coating) on the cover plate, so that the visual consistency of the setting area of the reflecting layer and the display area of the rearview mirror can be ensured, the visual chromatic aberration caused by insufficient setting precision of the reflecting layer is avoided, and the yield of the rearview mirror preparation is improved effectively finally.

Fig. 2 shows a front view of an exemplary cover plate 50 of an embodiment of the present application, fig. 3a shows a side view of the exemplary cover plate 50 of an embodiment of the present application, and fig. 3b shows an enlarged view at a in fig. 3a of an embodiment of the present application.

As shown in fig. 3b, the cover plate 50 may include a substrate 51 and a reflective layer 52 sequentially stacked in a direction in which the cover plate is directed to the display module 10.

The substrate 51 may be a glass substrate, such as a flexible glass substrate or a general glass substrate.

Fig. 4 shows a schematic view of the shape of an exemplary substrate 51 of an embodiment of the present application.

As shown in fig. 4, the side of the substrate 51 has a hem, that is, the edge region of the substrate has a hem. Thus, the appearance of the mirror can be improved.

Fig. 5 shows a specific structural diagram of an exemplary reflective layer 52 according to an embodiment of the present application.

As shown in fig. 5, the reflective layer 52 may be disposed on a side of the substrate 51 close to the display module 10, that is, on an inner side of the substrate 51. Specifically, the reflective layer 52 is disposed at an edge region (e.g., a portion of the edge region or all of the edge region) of the substrate 51 near the display module 10. That is, the orthographic projection of the reflective layer 52 on the display module 10 at least partially overlaps the orthographic projection of the edge of the substrate on the display module 10. Thus, the edge region of the cover plate 50 has the function of reflecting light, so that the whole region of the cover plate 50 can realize mirror reflection, and the mirror surface occupation ratio of the rearview mirror in the mirror surface state is improved. Further, in some examples, the display module 10 may include a display area and a non-display area, and an edge area of the substrate 51 at least partially overlaps with an orthographic projection of the non-display area of the display module 10 on the display module. The orthographic projection on the display module 10 refers to a projection on the display surface of the display module 10 (i.e., the surface of the display module 10 facing the cover 50) along the thickness direction of the display module 10.

The material of the reflective layer 52 may be reflective metal, such as metal Ag or metal Al.

Fig. 6 is a schematic diagram showing a specific structure of an exemplary light shielding layer 54 according to an embodiment of the present application.

In some embodiments, as shown in fig. 6, the cover plate 50 may further include a light shielding layer 54 to shield light emitted from the edge of the display module, so as to prevent light leakage. Specifically, the light shielding layer 54 may be disposed on a side of the reflective layer 52 close to the display module 10. An orthogonal projection of the light shielding layer on the substrate 51 may overlap an orthogonal projection of the reflective layer on the substrate 51. In other embodiments, there may be complete overlap.

The material of the light shielding layer 54 may be a black opaque material, such as black ink, or black photoresist BM.

Fig. 7 shows a specific structural diagram of an exemplary adhesive layer 53 of an embodiment of the present application.

An adhesive layer 53 may be disposed on a side of the light-shielding layer 54 adjacent to the display module 10 to adhere the cover plate 50 to the mirror assembly 60. That is, an orthogonal projection of the adhesive layer 53 on the substrate 51 may partially overlap an orthogonal projection of the reflective layer 52 on the substrate 51. In other embodiments, there may be complete overlap.

The adhesive layer 53 may be transparent, and the material thereof may be polyacrylate, such as vhb double-sided tape.

Fig. 8 is a schematic structural diagram of an exemplary display module 10 according to an embodiment of the present disclosure.

The Display module 10 may be a Liquid Crystal Display (LCD) module, an electroluminescent Display module, or a photoluminescent Display module. In the case that the display module 10 is an electroluminescent display module, the electroluminescent display module may be an Organic Light-Emitting display module (OLED) or a Quantum Dot electroluminescent display module (QLED). In the case that the display module 10 is a photoluminescent display module, the photoluminescent display module may be a quantum dot photoluminescent display module.

In some embodiments, as shown in fig. 8, the display module 10 includes a first polarizer 11, a first substrate 12, a driving function layer 13, a first liquid crystal layer 14, a second substrate 15, a third polarizer 16, and the like, which are stacked along a light emitting direction 71. And further includes a color filter layer CF and a black matrix pattern BM disposed between the second substrate 15 and the first liquid crystal layer 14. The color filter layer CF at least includes a red photoresist unit disposed in the red sub-pixel, a green photoresist unit disposed in the green sub-pixel, and a blue photoresist unit disposed in the blue sub-pixel. The black matrix pattern BM is configured to separate light emitted from different sub-pixels, and has an effect of reducing reflected light generated after external ambient light enters the inside of the liquid crystal display panel. The first liquid crystal layer 14 may include an alignment film for configuring an initial arrangement of liquid crystal molecules, a frame sealing adhesive for preventing the liquid crystal molecules from leaking, and supporting and connecting the first substrate 12 and the second substrate 15. It should be noted that a backlight (not shown in fig. 8) disposed on the non-display side of the display module may also be included in the display module 10.

Fig. 9a to 9b, fig. 10a to 10b, fig. 11a to 11b, fig. 12a to 12b, and fig. 13a to 13b show specific structural schematic diagrams of the rearview mirror according to the embodiment of the present application.

In some embodiments, as shown in fig. 9a to 9b, 10a to 10b, 11a to 11b, 12a to 12b, and 13a to 13b, the mirror assembly 60 may include a transflective film (e.g., 60a or 60 b). The transflective film (e.g., 60a or 60b) may be disposed between the reflective layer and the second substrate.

As shown in fig. 9a to 13a, when the display module 10 is closed, the first light incident from the side of the cover 50 away from the display module 10 can partially transmit through the transflective film, and then partially reflect and exit from the side of the cover 50 away from the display module 10, so that a pure mirror mode can be implemented. As shown in fig. 9b to 13b, when the display module 10 is turned on, the light emitted from the display module 10 can partially penetrate through the transflective film and is emitted from the side of the cover plate 50 away from the display module 10, so as to realize the display mode. In summary, the rearview mirror in the embodiment of the present application can achieve the display effect when the display module 10 is turned on; when the display module 10 is turned off, a pure mirror effect is achieved.

By providing the half-transparent and half-reflective film (for example, 60a or 60b), a streaming media rearview mirror capable of switching between a mirror surface function and a display function can be obtained, the overall thickness is reduced, the rearview mirror is thinned, and the yield of rearview mirror production can be improved due to fewer production levels.

The transflective film may be any one of a multilayer reflective polarizer (APF), a Reflective Polarizer (RPM), an optical brightness enhancement film (DBEF), or a metal mesh reflective polarizer.

In some embodiments, as shown in fig. 12a to 12b, a transflective film may be disposed on the cover plate 50 and located on a side of the cover plate 50 close to the second substrate 15 (e.g., a side of the adhesive layer 53 close to the second substrate 15). The transflective film may be a reflective polarizer RPM film 60 b.

FIG. 14 illustrates the mechanism of action of an exemplary reflective polarizer RPM film 60b of an embodiment of the present application.

As shown in fig. 14, the reflective polarizer RPM film 60b may transmit a portion of incident light in the form of transmitted light and reflect a portion of incident optical fiber in the form of reflected light, thereby achieving specular reflection.

In some embodiments, as shown in fig. 13a to 13b, when the transflective film (e.g., the reflective polarizer RPM film 60b) is disposed on the cover plate 50 and is located on a side of the cover plate 50 close to the second substrate 15, a polarizer (e.g., the third polarizer 16) may be further disposed on a side of the second substrate 15 of the display module 10 close to the specular switching screen 20.

Fig. 15 is a schematic diagram showing a relationship between the transmission axes of the third polarizer 16 and the transflective film according to the embodiment of the present disclosure.

Specifically, as shown in fig. 15, the transmission axis (e.g., n) of the third polarizer 16_Ax) And a transmission axis (e.g., n) of the reflective polarizer RPM film 60b_Bx) The same is true. In this way, by providing the third polarizer 16 on the side of the second substrate 15 of the display module 10 close to the mirror switching screen 20, it can be avoided that a part of the polarized light of the unpolarized light emitted by the display module 10 is reflected onto the display module 10 by the semi-reflective and semi-transparent film (e.g., the reflective polarizer RPM film 60b), and the secondary reflection interferes with the display image, which affects the display effect.

In some embodiments, the transflective film may be made of metal, such as a metal mesh reflective polarizer 60a (i.e. a metal film with a certain duty ratio, the metal region belongs to the reflective region, and the empty region belongs to the transmissive region).

In some embodiments, as shown in fig. 9a and 9b, the transflective film may be disposed on the second substrate 15 and located on a side of the second substrate 15 away from the cover plate 50. In this case, the transflective film may be made of a metal mesh reflective polarizing film 60 a. Specifically, as shown in fig. 8, the metal mesh reflection type polarizing film 60a may be disposed on a side of the second substrate 15 adjacent to the color filter layer CF and the black matrix pattern BM.

In this way, by disposing the metal mesh reflective polarizing film 60a on the side of the second substrate 15 close to the color filter layer CF and the black matrix pattern BM, the metal mesh reflective polarizing film can be directly prepared on the inner side of the second substrate 15 during preparation, thereby reducing the production cost of the product.

In some embodiments, as shown in fig. 10a to 10b, fig. 11a to 11b, fig. 12a to 12b, and fig. 13a to 13b, the transflective film is disposed between the cover plate 50 and the outer side of the second substrate 15 (i.e., the side of the second substrate 15 close to the cover plate 50).

In some embodiments, as shown in fig. 10a to 10b and fig. 11a to 11b, a transflective film is disposed on the second substrate 15 and is located on a side of the second substrate 15 close to the cover plate 50. That is, the transflective film is disposed outside the second substrate 15. Specifically, the transflective film may be an RPM film 60b, as shown in fig. 11a to 11 b. The transflective film may also be a metal mesh reflective polarizer 60a, as shown in fig. 10 a-10 b.

In some embodiments, a transflective film (e.g., a metal mesh reflective polarizer film 60a) may be reused as the third polarizer 16 of the display module 10. In this case, the transflective film (e.g., 60a or 60b) in fig. 10a to 10b or fig. 11a to 11b is the same polarizer as the third polarizer 16 in fig. 8. Therefore, the thickness of the rearview mirror can be reduced, the mirror surface function and the display function of the rearview mirror are not affected, the cost is reduced, and the yield of the preparation is improved.

In some embodiments, in the rearview mirror structures of fig. 9a to 9b, fig. 10a to 10b, fig. 11a to 11b, fig. 12a to 12b, and fig. 13a to 13b, a mirror face switching screen 20 such as that shown in fig. 2 may be further disposed between the cover plate 50 and the display module 10 according to specific anti-glare requirements.

FIG. 16a shows a simplified schematic view of an exemplary rearview mirror including a mirror switching screen 20 according to an embodiment of the present application; fig. 16b shows another schematic view of an exemplary rear view mirror comprising a mirror switching screen 20 according to an embodiment of the present application.

As shown in fig. 16a and 16b, in some embodiments, the mirror assembly 60 in the rear view mirror of the embodiment of the present application may include the mirror switching screen 20 and the transflective film. The semi-transparent semi-reflective film is arranged on the light emergent side of the display module 10; the mirror switching screen 20 is disposed on the side of the transflective film adjacent to the cover plate 50. The mirror switching screen is configured to be switchable between a highly transmissive state and a highly reflective state; and can determine whether to be in an anti-glare mode or a non-anti-glare mode according to the first light ray and the second light ray; the first light is incident light from the light emergent side of the display module; the second light is incident from the backlight side of the display module.

In some embodiments, as shown in fig. 17, the mirror switching panel 2 includes a reflective polarizer 21, a first transparent substrate 22, a first transparent electrode layer 23, a first alignment film 24, a second liquid crystal layer 25, a second alignment film 26, a second transparent electrode layer 27, a second transparent substrate 28, and an absorptive polarizer 29, which are sequentially disposed along a light emitting direction 71 of the display module 10. It should be noted that the liquid crystal layer 25 includes a frame sealing agent 251 and liquid crystal molecules located between the frame sealing agent 251, the first alignment film 24 and the second alignment film 26, and the disclosure is not described in detail herein.

Here, in the process of forming the second liquid crystal layer 25, the frame sealing adhesive 251, the first alignment film 24, and the second alignment film 26 need to be formed first, wherein the frame sealing adhesive 251 is provided with a liquid crystal filling opening, liquid crystal molecules are filled between the frame sealing adhesive 251, the first alignment film 24, and the second alignment film 26 through the liquid crystal filling opening, and finally the liquid crystal filling opening is sealed through the frame sealing adhesive to prevent the liquid crystal molecules from flowing out. It should be noted that the frame sealing adhesive 251 may have a plurality of crystal filling openings to improve the production efficiency; illustratively, two die filling openings are formed on the sealant 251.

It should be noted that the liquid crystal layer 25 includes a frame sealing agent 251 and liquid crystal molecules located between the frame sealing agent 251, the first alignment film 24 and the second alignment film 26, which will not be described in detail herein.

Illustratively, the transmission axis of the reflective polarizer 21 is substantially perpendicular to the absorption axis of the absorptive polarizer 29, the orientation direction of the first alignment film 24 is substantially parallel to the transmission axis of the reflective polarizer 21, and the orientation direction of the second alignment film 26 is substantially parallel to the absorption axis of the absorptive polarizer 29. That is, the long axis direction of the liquid crystal molecules of the liquid crystal layer 25 close to the first alignment film 24 is substantially parallel to the transmission axis of the reflection-type polarizer 21, the long axis direction of the liquid crystal molecules of the liquid crystal layer 25 close to the second alignment film 26 is substantially parallel to the absorption axis of the absorption-type polarizer 29, the liquid crystal molecules are arranged in layers, the arrangement directions of the molecules in the layers are the same, the arrangement directions of the liquid crystal molecules between the layers are staggered, and the overall molecular structure is spiral.

When the rear view mirror is in a natural state (no electric field is generated between the first transparent electrode layer 23 and the second transparent electrode layer 27), the non-polarized light on the side of the mirror switching panel 2 away from the display panel 12 is emitted to the absorption polarizer 29, the first polarized light of the non-polarized light is absorbed by the absorption polarizer 29, the second polarized light enters the liquid crystal layer 25 through the absorption polarizer 29 and the second alignment film 26, after passing through the liquid crystal layer 25, the polarization direction of the second polarized light is deflected by 90 ° and converted into the first polarized light, the polarization direction of the first polarized light is substantially perpendicular to the transmission axis of the reflection polarizer 21, the first polarized light is reflected back to the liquid crystal layer 25 by the reflection polarizer 21 through the first alignment film 24, and after passing through the liquid crystal layer 25 again, the polarization direction of the first polarized light is deflected by 90 ° and converted into the second polarized light, the second polarized light is transmitted through the second alignment film 26, The absorptive polarizer 29 is emitted to the outside. At this time, if each layer is an ideal dielectric material, the attenuation of light tends to zero, the reflectance of the mirror-surface switching panel 2 reaches the highest, the reflectance is greater than or equal to 40%, and the mirror-surface switching panel 2 is in a mirror-surface state where the reflectance is the highest.

When the rear view mirror is in the display state (a strong electric field exists between the first transparent electrode layer 23 and the second transparent electrode layer 27), the liquid crystal molecules are aligned along the direction of the electric field, and when the liquid crystal molecules are aligned substantially vertically (the long axis direction of the liquid crystal molecules is substantially parallel to the thickness direction of the mirror surface switching panel 2) against the anchoring force of the first alignment film 24 and the second alignment film 26, for example, the optical rotation of the liquid crystal molecules disappears, that is, the liquid crystal layer 25 does not contribute to the modulation of polarized light, and the polarized light passes through in the original direction. In this case, the unpolarized light emitted from the display panel 12 is emitted toward the reflective polarizer 21, the first polarized light of the unpolarized light is reflected by the reflective polarizer 21, the second polarized light passes through the reflective polarizer 21 and the first alignment film 24 and enters the liquid crystal layer 25, the polarization direction of the second polarized light is not changed after passing through the liquid crystal layer 25, and the second polarized light passes through the second alignment film 26 and the absorptive polarizer 29 and is emitted to the outside. At this time, if each layer is an ideal dielectric material, the attenuation of light tends to zero, the transmittance of the mirror-switching panel 2 reaches the highest, the transmittance is greater than or equal to 90%, and the mirror-switching panel 2 is in a transparent state where the transmittance is the highest.

As can be seen from the above, the transmission axis of the reflective polarizer 21 is substantially perpendicular to the absorption axis of the absorptive polarizer 29, the orientation direction of the first alignment film 24 is substantially parallel to the transmission axis of the reflective polarizer 21, and the orientation direction of the second alignment film 26 is substantially parallel to the absorption axis of the absorptive polarizer 29. By means of the arrangement, in a natural state, the mirror face switching screen 2 presents a mirror face state with the highest reflectivity, and the rearview mirror can clearly present a mirror image of an external environment; when displaying the picture, the mirror surface switching screen 2 is in a transparent state with the highest transmissivity, the rearview mirror can clearly display the picture, and the power consumption is low.

In some embodiments, the transflective film (e.g., 60a or 60b) may be multiplexed as the reflective polarizer 21 in the mirror-switching screen 20. The transflective film is the same as the reflective polarizer 21 in fig. 17 or fig. 16 b.

In some embodiments, the rear view mirror further comprises in particular a sensor unit and a control unit 40 or the like. The display module 10 may include a display area 17 and a non-display area 18. Here, the second substrate 15 may be disposed in the display region 17, and the sensor unit may be disposed in the non-display region 18.

The sensor unit may include a first sensor 31 and a second sensor 32, the first sensor 31 may be configured to detect information of a first light (e.g., an ambient light incident from the rear of the driving direction) incident from one side of the light emitting direction 71 of the display module 10, and the second sensor 32 may be configured to detect information of a second light (e.g., an ambient light in front of the driving direction) incident from one side of the cover plate pointing to the display module 10.

The control module 40 can receive the information of the first light detected by the first sensor 31 and the information of the second light detected by the second sensor 32, compare the information of the first light with the information of the second light, and adjust the mirror switching screen 20 to be in the antiglare mode or the non-antiglare mode. For example, when the difference between the intensity of the first light and the intensity of the second light is greater than or equal to the first predetermined light intensity, a corresponding control signal is sent to the mirror switching screen 20 to reduce the reflectivity of the mirror switching screen 20, so that the mirror switching screen 20 is in the anti-glare mode, thereby achieving the anti-glare purpose. For another example, when the difference between the intensity of the first light and the intensity of the second light is smaller than the first predetermined light intensity, a corresponding control signal is sent to the mirror switching screen 20, and the control signal is sent to increase the reflectivity of the mirror switching screen 20 to a corresponding range, so that the mirror switching screen 20 is in the non-glare mode.

Thus, by arranging the mirror surface switching screen 20, the sensor unit and the control unit 40, the overall reflectivity of the mirror surface assembly of the embodiment of the application can be regulated and controlled by the sensor unit and the control unit while the mirror surface-display switching of the streaming media rearview mirror is realized, so that the anti-dazzle effect is realized, the harm of the glare to people is avoided, and the safety performance of the rearview mirror is improved.

In some embodiments, the second substrate 15 of the display module 10 is further provided with a third polarizer 16 on a side close to the mirror switching screen 20. The absorption axis of the third polarizer 16 is substantially perpendicular to the absorption axis of the transflective film. That is, the absorption axis of the third polarizer 16 is the same as the absorption axis of the reflective polarizer 21 of the mirror switching panel 20, and may be 0 °. Therefore, the phenomenon that the display effect is influenced by the fact that the display module 10 is reflected by the semi-transparent and semi-reflective film to the display module 10 and the display picture is interfered by re-reflection in the non-polarized light emitted by the display module 10 can be avoided. In some embodiments, the mirror switching screen 20 may have a non-control region 281 corresponding to the non-display region 18 of the display module 10. A support 80 (e.g., sponge rubber) may be disposed between the non-control region 281 of the mirror switching screen 20 and the non-display region 18 of the display module 10 to improve the stability of the mirror switching screen 20. A Flexible Printed Circuit (FPC) 90 made of a multilayer board may be provided on the side of the supporting member 80 close to the second transparent substrate 26.

In some embodiments, the size and shape of the substrate 51 of the cover plate may be substantially the same as the second transparent substrate 28 of the mirror-switching screen 20. The substrate 51 presents an area corresponding to the non-control area 28 of the mirror-switching screen 20, for example an edge area of the substrate. That is, the size and shape of the edge region of the substrate may be substantially the same as the size and shape of the non-control region 281 of the mirror-switching screen 20. Like this, can cover the corner region of mirror surface switching screen 20 through the apron, avoid the mirror surface switching screen 20's corner obvious, and avoid the FPC90 of buckling to be seen easily, avoid sealing glue mouthful prominent and irritate the brilliant mouthful and expose, avoid the colour difference in the border region of display region 17 and semi-transparent semi-reflective membrane, promote the aesthetic property of rear-view mirror.

Like this, when adopting the apron 50 of encircleing the arc limit, can cover the corner region of mirror surface switching screen 20 better, avoid the corner of mirror surface switching screen 20 obvious, and avoid the FPC who buckles to be seen easily, avoid sealing the glue mouth and show and irritate the brilliant mouthful and expose, avoid the colour difference etc. of the three border region of the coating film region, display area 17 region and the overlay region of half-transparent half-reflection membrane, further promote the aesthetic property of rear-view mirror.

In some embodiments, referring back to fig. 5, the reflective layer 52 may be provided with a first through hole 521, and the first through hole 521 is used for transmitting light, for example, a first light (for example, an ambient light incident from the rear of the driving direction) incident from the light emitting direction 71 of the display module 10 and a second light (for example, an ambient light from the front of the driving direction) incident from the cover plate to the side of the display module 10, so as to facilitate detection by the sensor unit.

Returning to fig. 6, the light-shielding layer 54 may be provided with a second through hole 541. The second through hole 541 corresponds to the position where the first through hole 521 is disposed, and the shape and size of the second through hole 541 and the shape and size of the first through hole 521 may also correspond to each other, so as to better transmit the first light and the second light.

As shown in fig. 7, the adhesive layer 53 may be provided with a light-transmitting region 531, the light-transmitting region 531 may correspond to the position where the first through hole 521 is disposed, and the shape and size of the second light-transmitting region 531 may also correspond to the shape and size of the first through hole 521, so as to better transmit the first light and the second light.

In some embodiments, the light-transmitting regions 531 may be coated with a white light-transmitting material, such as silk-screened white ink, to cover the sensors (e.g., the first sensor 31 and the second sensor 32), and the like.

Based on the same inventive concept, the embodiment of the application also provides a vehicle corresponding to the rearview mirror of any embodiment.

In some embodiments, the rearview mirror of any embodiment can be used for an inner rearview mirror of a vehicle and an outer rearview mirror of an automobile.

Based on the same inventive concept, the embodiment of the application also provides a manufacturing method of the rearview mirror, which corresponds to any rearview mirror embodiment. Fig. 18 illustrates a method of manufacturing an exemplary rearview mirror of an embodiment of the present application. The method may include the following steps.

In step S1010, a display module is formed.

In step S1020, a cover plate is formed on one side of the light emitting direction of the display module; a reflecting layer is arranged on one side, close to the display module, of the cover plate; the orthographic projection of the reflecting layer on the display module is at least partially overlapped with the orthographic projection of the edge of the cover plate on the display module;

and a mirror assembly is formed between the display module and the cover plate and is configured to transmit light rays with a first polarization direction and reflect light rays with a second polarization direction.

In some embodiments, the material of the transflective film may be a metal. In step S1010, when forming the display module, the transflective film may be directly deposited on a side of the second substrate (e.g., fig. 9a or 9b) away from the cover plate by a sputter sputtering process, and then a subsequent color filter layer is formed.

In some embodiments, after step S1010 and before step S1020, forming a transflective film and a mirror switching screen stacked on the light emitting side of the display module may be further included.

In some embodiments, the material of the transflective film may be a reflective polarizer RPM film. In step S1020, when the cover plate is formed, a transflective film may be formed on a side of the cover plate close to the display module.

In some embodiments, step S1020 may specifically include:

a substrate is formed.

Forming a reflecting layer on one side of the substrate close to the display module; the orthographic projection of the reflecting layer on the display module is at least partially overlapped with the orthographic projection of the edge of the cover plate on the display module. The first through hole may be also reserved in the process of forming the reflective layer.

Forming a semi-transparent semi-reflective film on one side of the reflecting layer far away from the substrate; the orthographic projection of the semi-transparent and semi-reflective film on the cover plate is approximately superposed with two borders of the reflection layer close to each other in the orthographic projection of the cover plate, or a gap is formed between the orthographic projection of the semi-transparent and semi-reflective film on the base plate and two borders of the reflection layer close to each other in the orthographic projection of the base plate. The second through hole may be also reserved in the process of forming the transflective film.

In some embodiments, step S1020 may further include: and forming a light shielding layer on one side of the reflecting layer before forming the transflective film. An orthographic projection of the light-shielding layer on the substrate overlaps (e.g., completely overlaps) an orthographic projection of the reflective layer on the substrate. The light-transmitting region may be reserved in the process of forming the light-shielding layer. The first through hole and the second through hole are arranged corresponding to the light-transmitting area, so that the first light and the second light penetrate through the light-transmitting area, and the sensor can receive the light conveniently.

In some embodiments, the light transmissive region may be coated with a white light transmissive material to obscure the sensor.

In some embodiments, step S1020 may further include: and forming an adhesive layer on the side of the light shielding layer far away from the reflecting layer, wherein the orthographic projection of the adhesive layer on the substrate is overlapped (for example, completely overlapped) with the orthographic projection of the light shielding layer on the substrate.

It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or there can be more than one intermediate layer or element. Like reference numerals refer to like elements throughout.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the context of the present application, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of brevity.

In addition, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown in the provided figures for simplicity of illustration and discussion, and so as not to obscure the embodiments of the application. Furthermore, devices may be shown in block diagram form in order to avoid obscuring embodiments of the application, and this also takes into account the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the embodiments of the application are to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the application, it should be apparent to one skilled in the art that the embodiments of the application can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.

While the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description.

The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present application are intended to be included within the scope of the present application.

Claims

1. A rearview mirror, comprising:

a display module;

2. The rearview mirror of claim 1, wherein the cover plate further comprises: the light shielding layer is arranged on one side, close to the display module, of the reflecting layer; the orthographic projection of the light shielding layer on the cover plate is overlapped with the orthographic projection of the reflecting layer on the cover plate.

3. The rearview mirror of claim 1 or 2, wherein the cover plate further comprises: the bonding layer is arranged on one side, close to the display module, of the reflection layer; an orthographic projection of the bonding layer on the cover plate overlaps with an orthographic projection of the reflective layer on the cover plate.

4. The rearview mirror of claim 3, wherein the side of the cover plate has a hem.

5. The rearview mirror according to claim 1, wherein the mirror assembly comprises a transflective film, the display module is a liquid crystal display module, and the liquid crystal display module comprises a first substrate, a liquid crystal layer and a second substrate which are sequentially stacked along a light emitting direction; the transflective film is disposed between the reflective layer and the second substrate.

6. The rearview mirror of claim 5, wherein the transflective film is a reflective polarizer RPM film disposed on the cover plate on a side of the reflective layer adjacent to the second substrate.

7. The rearview mirror according to claim 6, wherein the liquid crystal display module further comprises a polarizer disposed on a side of the second substrate close to the cover plate; the transmission axis of the polarizer is the same as that of the RPM film of the reflective polarizer.

8. The rearview mirror of claim 5, wherein the material of the transflective film is a metal; the semi-transparent semi-reflective film is arranged on the second substrate and is positioned on one side, far away from the cover plate, of the second substrate.

9. The rearview mirror of claim 5, wherein the transflective film is disposed on the second substrate on a side of the second substrate adjacent to the cover plate.

10. The rearview mirror of claim 8 or 9, wherein the transflective film is reused as a polarizer of the display module.

11. The rearview mirror of claim 3, wherein the mirror assembly includes a mirror switching screen and a transflective film; the semi-transparent semi-reflective film is arranged on the light emergent side of the display module; the mirror face switching screen is arranged on one side of the semi-transparent semi-reflective film close to the cover plate; the mirror switching screen is configured to switch between a highly transmissive state and a highly reflective state; and can determine whether to be in an anti-glare mode or a non-anti-glare mode according to the first light ray and the second light ray; the first light is incident light from the light emergent side of the display module; the second light is incident from the backlight side of the display module.

12. The rearview mirror of claim 11, wherein the reflective layer is provided with a first through hole, the light-shielding layer is provided with a second through hole, and the adhesive layer is provided with a light-transmitting region; the first through hole and the second through hole are arranged corresponding to the light-transmitting area, so that the first light and the second light penetrate through the light-transmitting area.

13. The rearview mirror of claim 12, wherein said clear area is coated with a white clear material.

14. A vehicle comprising a rearview mirror as claimed in any one of claims 1 to 13.

15. A method of manufacturing a rearview mirror, comprising:

forming a display module;