CN210027211U

CN210027211U - Automobile rearview mirror with display function

Info

Publication number: CN210027211U
Application number: CN201920547760.2U
Authority: CN
Inventors: 黄琛; 金小莉; 周炎宏; 余荣
Original assignee: Shantou Ultrasound Display (Second Factory) Co Ltd
Current assignee: Shantou Ultrasound Display (Second Factory) Co Ltd
Priority date: 2019-04-22
Filing date: 2019-04-22
Publication date: 2020-02-07
Anticipated expiration: 2029-04-22

Abstract

An automobile rearview mirror with a display function comprises a reflector and a display which are overlapped with each other, wherein the reflector is arranged on the outer side of the display; the reflector comprises a liquid crystal box designed by adopting a light valve, a first polaroid and a reflector plate, wherein the first polaroid is arranged on the outer side surface of the liquid crystal box, and the reflector plate is directly adhered to the inner side surface of the liquid crystal box through a first transparent adhesive layer with a flat whole surface; the reflector is a polarized light reflector capable of reflecting linearly polarized light with a first polarization direction and transmitting linearly polarized light with a second polarization direction, and the first direction and the second direction are two directions which are perpendicular to each other on the plane where the polarizer is located; and the reflector and the display are mutually adhered through a second transparent adhesive layer with flat whole surface, so that the reflector plate is tightly sealed between the first transparent adhesive layer and the second transparent adhesive layer. The automobile rearview mirror adopts the polarized light reflector to realize reflection, and the polarized light reflector is not easy to deform in a high-temperature environment in an automobile.

Description

Automobile rearview mirror with display function

Technical Field

The utility model relates to an automobile rearview mirror, especially an automobile rearview mirror with display function.

Background

The automobile rearview mirror with the display function generally comprises a reflector and a display, can be used as a rearview mirror, integrates the image display function, and can be used for image display of equipment such as a reversing camera, a driving recorder and the like.

In the conventional product, the image reflected by the mirror of the automobile rearview mirror with display function is overlapped with the image of the display, thereby interfering the display of the image. In order to overcome the above problems, it is proposed to use a liquid crystal light valve in combination with a certain polarization reflection plate to manufacture the above reflector, wherein the polarization reflection plate is disposed on the inner side surface of the liquid crystal light valve, and can reflect linearly polarized light with a polarization direction of a first direction and transmit linearly polarized light with a polarization direction of a second direction (the first direction and the second direction are two directions perpendicular to each other on the plane of the polarizer).

However, since the polarizer is generally made of a thin organic plastic film, when the temperature inside the vehicle is too high (e.g. under the condition of summer insolation), the high temperature of the environment may deform (e.g. curl, bulge) the polarizer, thereby destroying the mirror reflection effect of the reflector.

Disclosure of Invention

The utility model aims at providing an automobile rearview mirror with show function, it adopts the bias reflector plate to realize the reflection, and its bias reflector plate is difficult to take place to warp under the high temperature environment in the car, and the technical scheme who adopts as follows:

the utility model provides an automobile rearview mirror with show function which characterized in that:

the display comprises a reflector and a display which are overlapped with each other, wherein the reflector is arranged on the outer side of the display;

the reflector comprises a liquid crystal box designed by adopting a light valve, a first polaroid and a reflector plate, wherein the first polaroid is arranged on the outer side surface of the liquid crystal box, and the reflector plate is directly adhered to the inner side surface of the liquid crystal box through a first transparent adhesive layer with a flat whole surface;

the reflector is a polarized light reflector capable of reflecting linearly polarized light with a polarization direction in a first direction and transmitting linearly polarized light with a polarization direction in a second direction, and the first direction and the second direction are two directions which are perpendicular to each other on a plane where the polarizer is located; and the number of the first and second groups,

the reflector and the display are mutually adhered through a second transparent adhesive layer with flat whole surface, so that the reflector plate is tightly sealed between the first transparent adhesive layer and the second transparent adhesive layer.

In particular, the display may be a liquid crystal display, especially a TFT liquid crystal display, and the display may also be a flat panel display such as OLED, micro-LED, QLED, etc., at least the inner surface (for the liquid crystal display) or the outer surface (for the flat panel display such as OLED, micro-LED, QLED, etc.) of the display is provided with a polarizer, and the polarizing axis angle of the polarizer is set as: when the display displays, the effective light emission of the display is linearly polarized light with the polarization direction being the second direction, so that the light emission of the display can be transmitted out of the reflector.

Reference is made to the relevant disclosure of Reflective Polarizer Mirror products from 3M company.

The main structure of the liquid crystal box is generally two flat glass substrates which are mutually attached and provided with a certain gap (the thickness is 2-10 mu m), and the gap is filled with nematic liquid crystal; the inner side surface of the glass substrate is provided with an orientation layer and a transparent electrode which can be drawn out, and as a light valve, the overlapping area of the transparent electrode, namely the controllable area of the light valve, generally occupies the whole or most area of the liquid crystal box; the alignment layer is used to align (horizontally align/orient) the liquid crystal molecules, and the liquid crystal cell can be generally set as a TN cell by the rubbing angle of the alignment layer; the first polarizer may be a general linear polarizer whose direction of the polarizing axis is set to a second direction in general. When in use: when the rearview mirror does not need to display and is only used as a rearview mirror, no voltage is applied to the liquid crystal box, external light is polarized through the first polarizer and enters the liquid crystal box, and the polarization direction of the light is that the liquid crystal box is twisted by 90 degrees and is along the first direction, so that the light can be reflected by the reflector; when the automobile rearview mirror displays images, voltage is applied to the liquid crystal box, the polarization direction of light is kept to be the second direction, the light cannot be reflected by the reflector plate, and therefore no scene can be reflected out to interfere the display of the images.

The first and second transparent adhesive layers may be 5-1000 μm transparent adhesive layers. The reflector plate is tightly sealed between the first transparent adhesive layer and the second transparent adhesive layer and is limited and isolated by the two adhesive layers, so that the reflector plate is difficult to deform such as curling and bulging even in a high-temperature environment in a vehicle, and the damage to the rearview mirror of the vehicle caused by the high-temperature environment is avoided; in addition, the first glue layer and the second glue layer form large-area fixation between the reflector and the display, and when force transmission exists between the reflector and the display, the contact area between the reflector and the display is large, so that the reflector is uniformly stressed and cannot easily cause bending deformation of the reflector.

Preferably, the thickness of the first transparent adhesive layer and the second transparent adhesive layer varies by no more than 10 μm, thereby being capable of ensuring a flat specular reflection effect of the reflective sheet. Preferably, the first transparent adhesive layer and/or the second transparent adhesive layer are/is a non-setting adhesive layer, specifically, the first transparent adhesive layer and/or the second transparent adhesive layer can be non-setting adhesive layers such as acrylic resin, organic silicon and PU, the first transparent adhesive layer and/or the second transparent adhesive layer is/are a non-setting adhesive layer which generally has slow flowability, and when the ambient temperature changes (the temperature in the vehicle generally can obviously change), the non-setting adhesive layer can slowly release the deformation and stress between the reflector and the display due to the temperature change and the thermal expansion and contraction, so that the flat mirror reflection effect of the reflector is ensured.

In a preferred embodiment of the present invention, the rear view mirror further includes a protection lens adhered to the outer side surface of the reflector, which is made of flat glass, and the protection lens has an edge region larger than the reflector. The protective lens can be used for protecting the first polaroid and preventing the surface of the first polaroid from being scratched in the using process, so that the clearness of the reflector and the display is ensured; in addition, the rearview mirror can be fixed through the edge area of the protective lens, and the edge area of the protective lens is fixed instead of the reflector or the display, so that the mirror reflection effect of the reflector can be prevented from being damaged due to the fact that the reflector is stressed to bend and deform.

Further preferably, the protective lens and the reflector are adhered through a third transparent adhesive layer on the whole surface. Therefore, when the rearview mirror is fixedly installed on the edge of the protective lens, the protective lens is connected with the reflecting mirror in a large area through the third transparent adhesive layer, and the reflecting mirror is stressed uniformly and is not easy to bend and deform. Further preferably, the third transparent adhesive layer is also a non-dry adhesive layer, specifically, the third transparent adhesive layer may also be a non-dry adhesive layer such as acrylic resin, silicone, PU and the like, and the third transparent adhesive layer is a non-dry adhesive layer, and because the non-dry adhesive layer has slow fluidity, when the ambient temperature changes, the non-dry adhesive layer can release deformation and stress between the reflector and the protective lens due to thermal expansion and contraction, and the flat mirror reflection effect of the reflector is ensured.

The following is more specifically described with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic external view of a rearview mirror for an automobile according to a first embodiment;

FIG. 2 is a schematic structural component view of a rearview mirror for an automobile according to a first embodiment;

fig. 3 is a schematic view of the first embodiment of the automobile rearview mirror, wherein the reflective layer is sealed by the first and second transparent adhesive layers.

Detailed Description

As shown in fig. 1 and 2, a vehicle rear view mirror 100 with a display function includes a display 10, a reflecting mirror 20, and a protective lens 30, which are laminated inside to outside.

As shown in fig. 2, the reflector 20 includes a TN liquid crystal cell 21 using a light valve design, a first polarizer 22, and a reflector 23, wherein the first polarizer 22 is attached to an outer side of the liquid crystal cell 21. The reflective sheet 23 is a reflective polarizer Mirror product of 3M company, and is adhered to the inner side of the liquid crystal cell 21 by a first transparent adhesive layer 41 with a flat surface. The reflector 23 is a polarizer that reflects linearly polarized light with a first polarization direction and transmits linearly polarized light with a second polarization direction, and the first and second directions are two directions perpendicular to each other on a plane of the polarizer (not shown in the figure).

The display 10 is a TFT lcd panel, which is adhered to the inner side of the reflector 20 by a second transparent adhesive layer 42 with a flat surface as shown in fig. 2, so that the reflective sheet 23 is sealed between the first transparent adhesive layer 41 and the second transparent adhesive layer 42 as shown in fig. 3. Display 10 includes a TFT liquid crystal cell 11, a second polarizer 12, a third polarizer 13, and a backlight 14. The polarizing axis angle of the third polarizer 13 is the second direction, so that the display 10 emits light linearly polarized in the second direction when displaying, so that the light emitted by the display 10 can be transmitted through the reflector 23.

As shown in fig. 2, since the area of the display 10 is smaller than that of the reflector 20, a glass barrier 15 is further disposed in the area of the reflector 20 beyond the display 10, and the inner side of the glass barrier 15 is coated with a black layer (not shown), which is also adhered to the inner side of the reflector 20 through a second transparent adhesive layer 42 with a flat surface, so that the reflective sheet 23 of the corresponding area is also sealed between the first transparent adhesive layer 41 and the second transparent adhesive layer 42.

As shown in fig. 2, the protective lens 30 is adhered to the outer side surface of the reflector 20 through a whole third transparent adhesive layer 43, and is made of flat tempered glass, the protective lens 30 has an edge region 31 slightly larger than the reflector 20, and a black masking layer for shielding the internal structure of the edge of the rearview mirror is printed on the inner side of the edge region 31.

The first transparent adhesive layer 41 has a thickness of (10 ± 5) μm, and the second transparent adhesive layer 42 and the third transparent adhesive layer 43 have a thickness of (200 ± 10) μm, which are transparent non-drying adhesive layers mainly containing acrylic resin (which may be silicone or PU).

In other embodiments of this embodiment, the thicknesses of the first transparent adhesive layer 41, the second transparent adhesive layer 42 and the third transparent adhesive layer 43 may be set to values between 5 μm and 1000 μm, but the thickness thereof does not vary by more than 10 μm.

In other embodiments of this embodiment, the third polarizer 13 of the display 10 may be omitted, and the polarization axis angle from the second polarizer 12 is set, so that the light is effectively emitted as linearly polarized light with the polarization direction in the second direction, so that the light emitted by the display 10 can be transmitted through the reflector 23.

The utility model discloses an in other some other schemes, display screen 10 still can be for flat panel display such as OLED, micro-LED, QLED, and the third polaroid is posted equally to its lateral surface, and the polarisation axle angle of third polaroid is the second direction.

In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and all the equivalent or simple changes made according to the structure, the features and the principle of the present invention are included in the protection scope of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides an automobile rearview mirror with show function which characterized in that:

2. The vehicle rearview mirror according to claim 1, wherein: the thickness of the first transparent adhesive layer and the second transparent adhesive layer is not changed by more than 10 μm.

3. The vehicle rearview mirror according to claim 1, wherein: the first transparent adhesive layer and/or the second transparent adhesive layer are/is a non-drying adhesive layer.

4. The vehicle rearview mirror according to claim 3, wherein: the first transparent adhesive layer and/or the second transparent adhesive layer are acrylic resin, organic silicon or PU non-dry adhesive layers.

5. The vehicle rearview mirror according to claim 1, wherein: the rearview mirror further comprises a protective lens, the protective lens is adhered to the outer side face of the reflector and is made of flat glass, and the protective lens is provided with an edge area larger than the reflector.

6. The vehicle rearview mirror according to claim 5, wherein: the protective lens and the reflector are adhered tightly through a third transparent adhesive layer on the whole surface.

7. The vehicle rearview mirror according to claim 6, wherein: the third transparent adhesive layer is a non-drying adhesive layer.

8. The vehicle rearview mirror according to claim 6, wherein: the third transparent adhesive layer is an acrylic resin, organic silicon or PU non-dry adhesive layer.