CN212623463U

CN212623463U - Bandage type anti-dazzle rearview mirror

Info

Publication number: CN212623463U
Application number: CN202021945045.3U
Authority: CN
Inventors: 李国文; 薛九枝; 赵阳光; 马栋宇; 钱宇晨
Original assignee: Suzhou Cuiwei Intelligent Technology Co ltd
Current assignee: Suzhou Cuiwei Intelligent Technology Co ltd
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2021-02-26
Anticipated expiration: 2030-09-08

Abstract

The utility model discloses a bandage formula anti-dazzle rear-view mirror, include: a housing; an absorption-type polarizing layer; a liquid crystal dimming layer, and a reflective polarizing layer; the liquid crystal dimming layer comprises a first transparent substrate, a first transparent electrode, a first alignment layer, a liquid crystal layer, a second alignment layer, a second transparent electrode and a second transparent substrate which are sequentially arranged, and the first transparent substrate is positioned on one side close to the absorption type polarizing layer; the side of the shell facing the observer is provided with a wrapping part extending towards the inside of the shell, and the absorption type polarizing layer, the liquid crystal dimming layer and the reflection type polarizing layer are all positioned in the shell and fixed in position by the wrapping part; the bandage type anti-dazzle rearview mirror further comprises a back hook detachably fixed on the back of the shell and a bandage which is matched with the back hook and is detachably connected up and down. The utility model discloses a bandage formula anti-dazzle rear-view mirror does not have the ghost image, anti-dazzle fast to the installation is simple and easy convenient.

Description

Bandage type anti-dazzle rearview mirror

Technical Field

The utility model relates to the technical field of auto-parts, in particular to bandage formula anti-dazzle rear-view mirror.

Background

At present, the traditional automobile inside rear-view mirror not only has single function, but also has severely limited rear view, so in recent years, the streaming media rear-view mirror with a display screen is gradually favored by people. Briefly, the traffic information behind the car is caught through installing the back pull camera at the afterbody outside the car to the streaming media rear-view mirror, and on the display screen in the interior rear-view mirror was transmitted in real time, driver and crew just can know rear road conditions through watching display screen, compares with traditional specular reflection rear-view mirror, and the field of vision that the streaming media rear-view mirror was observed is wideer, has the effect of preferred equally in rain and fog weather.

Although the streaming media rearview mirror is rapidly developed in the industry in recent years, and related products are full of magnificent, the problems that safety and experience are affected are still solved, for example, double images, low display brightness, serious heat generation, high cost, complex installation, low adaptability, no automatic anti-dazzle or low anti-dazzle speed, complex operation and the like are solved.

Disclosure of Invention

An object of the utility model is to provide a bandage formula anti-dazzle rear-view mirror to the above technical problem who exists among the prior art.

The utility model adopts the following technical scheme:

a bandage-type anti-glare rearview mirror comprising: a housing; an absorption-type polarizing layer; a liquid crystal dimming layer disposed under the absorptive polarizing layer in substantial dimensional correspondence with the absorptive polarizing layer; a reflective polarizing layer disposed under the liquid crystal dimming layer substantially in size correspondence with the liquid crystal dimming layer, an absorption axis polarization direction of the absorptive polarizing layer and a reflection axis polarization direction of the reflective polarizing layer being parallel or perpendicular to each other; the back hook is detachably fixed on the back of the shell, and the bandage is matched with the back hook and is detachably connected up and down; the liquid crystal dimming layer comprises a first transparent substrate, a first transparent electrode, a first alignment layer, a liquid crystal layer, a second alignment layer, a second transparent electrode and a second transparent substrate which are sequentially arranged, the first transparent substrate is positioned at one side close to the absorption type polarizing layer, one side of the shell facing an observer is provided with a hemming portion extending towards the inside of the shell, and the absorption type polarizing layer, the liquid crystal dimming layer and the reflection type polarizing layer are all positioned in the shell and fixed in position by the hemming portion.

Preferably, the liquid crystal display device further comprises at least one light sensor and a control unit, wherein the light sensor detects the change of the ambient light and feeds back information to the control unit, and the control unit electrically controls and adjusts the voltage applied to the liquid crystal layer according to the information.

Preferably, the display module is located on the side, away from the liquid crystal dimming layer, of the reflective polarizing layer, and the display module, together with the absorption polarizing layer, the liquid crystal dimming layer and the reflective polarizing layer, is located in the housing and fixed in position by the edge wrapping portion.

Preferably, the outer shell comprises a front shell facing one side of an observer and a rear shell facing away from one side of the observer, the edge covering part is located on the front shell, the front shell further comprises at least one buckle, and the edge of the display module is clamped in the buckle.

Preferably, the display module further comprises a dustproof sponge or glue layer positioned between the reflective polarizing layer and the display module.

Preferably, the camera system further comprises a front camera module, a front camera patch cord, a rear camera module and a rear camera patch cord, wherein the front camera module is connected with the control unit through the front camera patch cord, and the rear camera module is connected with the control unit through the rear camera patch cord.

Preferably, the front camera module includes a front light sensor and/or the rear camera module includes a rear light sensor.

Preferably, the microphone also comprises a loudspeaker and a microphone for sending and receiving sound signals.

Preferably, a key is also included on the housing.

Preferably, the special vehicle special back plate and/or the special vehicle special bracket is/are detachably and fixedly connected to the side, facing away from the observer, of the shell.

The utility model discloses a bandage formula anti-dazzle rear-view mirror does not have the ghost image, anti-dazzle fast to the installation is simple and easy convenient.

Drawings

The invention may be better understood by referring to the illustrations of embodiments of the invention in which:

FIG. 1 is a schematic sectional view of a bandage-type anti-glare rearview mirror according to an embodiment of the present invention;

FIG. 2 is a schematic view showing a specific structure of a liquid crystal dimming layer in a bandage-type anti-glare rearview mirror according to an embodiment of the present invention;

FIG. 3 is another schematic structural view of the bandage-type anti-glare rearview mirror according to the embodiment of the present invention;

FIG. 4 is an exploded view of the structures of the bandage-type anti-glare rearview mirror according to the embodiment of the present invention;

FIG. 5 is a schematic view of the connection structure between the control unit and each part in the bandage-type anti-glare rearview mirror according to the embodiment of the present invention;

fig. 6 is a schematic light path diagram of the bandage-type anti-glare rearview mirror according to the embodiment of the present invention in the working state of the streaming media display with the lowest reflectivity and the highest transmittance;

FIG. 7 is a schematic view of the light path of the bandage-type anti-glare rearview mirror in an anti-glare state according to the embodiment of the present invention;

fig. 8 is a schematic view of the light path when the bandage-type anti-glare rearview mirror according to the embodiment of the present invention is in the mirror surface state with the highest reflectivity and the lowest transmittance.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. The illustrated example embodiments of the present invention are provided for illustration only and not to limit the invention. Therefore, the scope of the present invention is not limited by the specific embodiments, but only by the scope of the appended claims.

The bandage-type anti-glare rearview mirror according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is the section structure schematic diagram of bandage formula anti-dazzle rear-view mirror of specific embodiment, fig. 2 is the utility model discloses specific embodiment's liquid crystal dimming layer's in bandage formula anti-dazzle rear-view mirror concrete structure schematic diagram combines fig. 1 and fig. 2 to show, the utility model discloses specific embodiment's bandage formula anti-dazzle rear-view mirror includes: the shell can be of an integral structure or composed of different parts, and in the embodiment, the shell comprises a front shell 6 facing to a viewer and a rear shell 7 facing away from the viewer; an absorption type polarizing layer 110, the absorption type polarizing layer 110 absorbing light having a polarization direction identical to that of an absorption axis of the absorption type polarizing layer and allowing light having a polarization direction perpendicular to the absorption axis of the absorption type polarizing layer to pass therethrough; a liquid crystal dimming layer 120, the liquid crystal dimming layer 120 being disposed under the absorption type polarizing layer 110 in substantially size-conformity with the absorption type polarizing layer 110; a reflective polarizing layer 130, the reflective polarizing layer 130 being disposed under the liquid crystal dimming layer 120 substantially in size correspondence with the liquid crystal dimming layer 120, the reflective polarizing layer 130 reflecting light in correspondence with a polarization direction of a reflection axis of the reflective polarizing layer 130 and allowing light perpendicular to the polarization direction of the reflection axis of the reflective polarizing layer 130 to pass therethrough, the reflective polarizing layer 130 being, for example, selected from an APF film, an RPM film, a DBEF film, a wire mesh reflective polarizing film, or the like. In this embodiment, the absorption axis polarization direction of the absorption type polarizing layer 110 and the reflection axis polarization direction of the reflection type polarizing layer 130 are parallel to each other or perpendicular to each other.

As shown in fig. 2, in the present embodiment, the liquid crystal dimming layer 120 includes a first transparent substrate 121, a first transparent electrode 122, a first alignment layer 123, a liquid crystal layer 124, a second alignment layer 125, a second transparent electrode 126, and a second transparent substrate 127, which are sequentially disposed, the first transparent substrate 121 is located on a side close to the absorption type polarization layer 110, as shown in fig. 1, in the present embodiment, a side of the housing facing the viewer has a rim portion 61 extending toward the inside of the housing, in the present embodiment, the housing includes a front housing 6 facing the viewer and a rear housing 7 facing away from the viewer, the rim portion 61 is located on the front housing 6, the rim portion 61 surrounds an upper portion of the front housing 6 and extends toward the inside of the front housing 6, and the absorption type polarization layer 110, the liquid crystal dimming layer 120, and the reflection type polarization layer 130 are all located in the front housing 6 and fixed in position by the rim portion 61. In the present embodiment, it is preferable that the display module 3 is further included on a side of the reflective polarizing layer 110 away from the liquid crystal dimming layer 120, and as shown in fig. 1, the display module 3, the absorptive polarizing layer 110, the liquid crystal dimming layer 120, and the reflective polarizing layer 130 are together located in the front case 6, and the position of the display module is fixed by the edge-covering portion 61, and the edge-covering portion 61 has a function of shielding an edge portion of the liquid crystal dimming layer 120, for example, shielding a region such as frame glue disposed at an edge of the liquid crystal dimming layer 120, in addition to the function of fixing the above components located in the front case 6, and has an advantage of more beautiful appearance and more reliable performance. In this embodiment, preferably, as shown in fig. 1, the front shell 6 further includes at least one buckle 62, and the edge of the display module 3 is clamped in the buckle 62. Preferably, buckle 62 quantity is for being greater than two a plurality ofly, for example for 4-6, and a plurality of buckles 62 scatter and distribute, buckle 62 direct with display module assembly 3 edge contact and block the edge part of display module assembly 3 with fixed display module assembly 3, nevertheless the utility model discloses be not limited to this, buckle 62 still can be for other fixed or limit structure, can realize fixed or block the structure of putting rather than the display module assembly 3's of next-door neighbour position all can, no longer gives things convenient for the repeated description. In this embodiment, as shown in fig. 1, it is preferable that the display module further includes a dustproof sponge or glue layer 2 located between the reflective polarizing layer 130 and the display module 3, the thickness of the dustproof sponge or glue layer 2 is between 0.2mm and 3.0mm, if the dustproof sponge is adopted, the dustproof sponge may have glue on one side, for example, the glue surface is attached to the periphery outside the effective display area of the display module 3, so as to play a role of dustproof and buffering; if adopt the glue film, for example choose OCA, OCR, SCA, EVA, PVB, double faced adhesive tape etc. for use, utilize OCA, OCR, SCA, EVA, PVB, double faced adhesive tape to carry out frame subsides or laminating entirely, connect the liquid crystal dimming layer that has the reflection-type polaroid and display module assembly to increase joint strength and reliability, and can eliminate the air bed in order to promote the display effect, no longer describe repeatedly.

Fig. 3 is another schematic structural diagram of the bandage-type anti-glare rearview mirror according to an embodiment of the present invention, and fig. 4 is an explosion diagram of each structure in the bandage-type anti-glare rearview mirror according to an embodiment of the present invention, and as shown in fig. 3 and fig. 4, the bandage-type anti-glare rearview mirror according to the present embodiment includes a back hook 14 and a bandage 15, the back hook 14 is detachably fixed to the back of the rear housing 7, the bandage 15 has upper and lower connecting holes, and the bandage 15 is connected to the back hook 14 through the upper and lower connecting holes and the upper and lower detachably in the back hook 14. Preferably, a rear camera module 12 and/or a rear light sensor 13 may also be included for taking rear images and/or receiving rear light intensity signals. In addition, a special vehicle-specific back plate 16 and/or a special vehicle-specific bracket 17 can be further included on the side of the housing facing away from the observer (i.e., on the back of the rear housing 7 in this embodiment), so as to facilitate connection and fixation with various types of rearview mirrors or different models currently on the market. Can the rear-view mirror of automatically regulated reflectivity adopt special car special stand mostly in the existing market, damage or when initiatively changing new rear-view mirror at the original-mounted rear-view mirror, need dismantle the original-mounted rear-view mirror, and different motorcycle types have different support and base, and some motorcycle types are dismantled the difficulty, need go 4S shop or professional auto repair point even and just can accomplish the change. In the embodiment, the back hook, the binding band and the detachable special back plate for the special vehicle are arranged on the rear mirror rear shell, so that the special vehicle can be suitable for various vehicle types and meet various installation requirements. Particularly, when the original rearview mirror needs to be removed for mounting in order to pursue beauty or other purposes, the rearview mirror of the utility model is firstly dismounted from the rearview mirror back shell, then the special-purpose back plate for the special vehicle is mounted on the rearview mirror back shell, then the special-purpose bracket for loading is fixed in the special-purpose clamping groove for the special vehicle by screws, and finally the special-purpose bracket for the special vehicle is mounted on the front windshield, and the special-purpose back plate for the special vehicle is provided with the universal special-purpose bracket clamping groove for the special vehicle, so that the special-purpose bracket for the special vehicle of most vehicle types in the market can be matched; the utility model discloses in, for simple to operate, also can demolish the special backplate of special car from the rear-view mirror backshell, direct mount back of the body hook and bandage on the backshell, particularly, two sets of back of the body hook positions about having on the rear-view mirror backshell, every group has two upper and lower back of the body hooks and is furnished with an elastic bandage. When the rearview mirror is replaced, one end of the binding band is hooked on one back hook, the original rearview mirror is wound, the binding band is stretched to a proper tightness degree, the other end of the binding band is hooked on the other back hook at the position of the same group of back hooks, the other group of back hooks are arranged in the same position, and the operation method is the same. In a word, the utility model discloses the dismantlement process of former dress mirror also can be saved in the installation that can be applicable to the special car special stand of various motorcycle types, through bandage form direct mount on former dress rear-view mirror, solve the problem that the rear-view mirror suitability that exists is low among the prior art.

Fig. 5 is a schematic view of a connection structure between a control unit and each part in the bandage-type anti-glare rearview mirror according to an embodiment of the present invention, as shown in fig. 5, the bandage-type anti-glare rearview mirror of this embodiment further includes at least one optical sensor and a control unit, the optical sensor detects the change of ambient light and feeds back information to the control unit, and the control unit electrically controls and adjusts the voltage applied to the liquid crystal layer in the liquid crystal light modulation layer according to the detected change information of the ambient light. In this embodiment, it is preferable that the light sensors include a front light sensor facing the front of the strap-on anti-glare rear view mirror and a rear light sensor facing the rear of the strap-on anti-glare rear view mirror, the front light sensor and the rear light sensor are operatively connected to the control unit, specifically, the front light sensor senses a change in ambient light intensity at all times, when the ambient light intensity falls below a certain value (at night or enters a dark environment), the front light sensor sends a signal (r) to the control unit, when the control unit receives the signal (r), the rear light sensor starts to detect light intensity from the rear of the vehicle, if it is detected that the light intensity from the rear of the vehicle is greater than a certain value (for example, the rear vehicle turns on a high beam), the rear light sends a signal (r) to the control unit, and the control unit receives the signal (r), the control unit outputs a voltage to the first transparent electrode 122 and the second transparent, different voltages are applied to liquid crystal molecules in the liquid crystal dimming layer 120 through the control unit, the arrangement structure of the liquid crystal molecules is adjusted, so that the polarization direction of light passing through the liquid crystal dimming layer is adjusted, the specular reflectivity of the strap-type anti-dazzle rearview mirror is reduced, the anti-dazzle effect is achieved, and after strong light disappears after a vehicle is driven, the control unit controls the specular reflectivity of the rear strap-type anti-dazzle rearview mirror to be increased, and the normal state is automatically recovered. In this embodiment, the front light sensor and the rear light sensor are, for example, patch type or plug-in type light sensors.

As shown in fig. 5, in the bandage-type antiglare rearview mirror of this embodiment, the display module 3 is, for example, a TFT liquid crystal display screen with a size of 9.2 inches/9.35 inches/9.66 inches/9.88 inches or larger. As shown in fig. 5, in this embodiment, the display module 3 is operably connected to the control unit, and the control unit can control the display module 3 to display different contents, for example, the control unit controls the display module to display the traffic information in front of or behind, so that the driver and the passenger can observe the traffic information in front of or behind in real time through the display module. Referring to fig. 3 to 5, the bandage-type antiglare rearview mirror of the present embodiment further includes a front camera module 10, a front camera patch cord (not shown), a rear camera module 12, and a rear camera patch cord (not shown), wherein the front camera module 10 is connected to the control unit through the front camera patch cord, and the rear camera module 12 is connected to the control unit through the rear camera patch cord. In this embodiment, for example, the front camera module 10 includes a front lens module, a front camera cover, a front camera holder, and a front camera decoration. The front camera module 10 is operatively connected to a control unit through a front camera connection line, and the control unit can issue various instructions to the front camera module 10, and the front camera module 10 performs instructions of photographing/transmitting a front road condition, etc. In this embodiment, the front camera module 10 and the casing of the bandage-type anti-glare rearview mirror are tightly assembled together to form an integrated design; in another preferred embodiment, the front camera module 10 is independent from the casing of the bandage-type antiglare rearview mirror, and the front camera module 10 is operatively fixed to a front windshield position or other positions of the automobile. The rear camera module 12 includes a rear lens module, a rear camera front cover, a rear camera rear cover, a rear camera support, and a rear camera decoration. The rear camera module 12 is operatively connected to the control unit through a front camera connection line, the control unit can issue various instructions to the rear camera module 12, the rear camera module 12 performs shooting/transmitting instructions of rear road conditions and the like, and the rear road conditions are displayed on the display module 3 through the control unit. As shown in fig. 5, in the present embodiment, the control unit is electrically connected to the rear camera module 12, the rear light sensor 13, the display module 3, the liquid crystal dimming layer 120, the front camera module 10 (preferably, the front camera module 10 includes the front light sensor 11 in the present embodiment), the microphone 9, the speaker 5, and the power supply, respectively, and receives information of structures of the components and controls working states of the components. In the present embodiment, the front camera module 10 preferably includes the optical sensor 11, and the front camera module 10 preferably serves as both a part of the front lens module and a front optical sensor, specifically, the front camera module 10 includes built-in components such as an image sensor, a highly integrated image processor, an embedded power supply, and a high-quality aspheric lens, and the image sensor preferably serves as the front optical sensor at the same time, and in this preferred embodiment, there is no need to additionally configure a front light sensor, and the image sensor is preferably a CMOS image sensor or a CCD image sensor. In another preferred embodiment, an optical sensor is additionally provided, for example, the front camera module 10 is installed at a position where the taped anti-glare rearview mirror housing is not easily shielded from light. In the embodiment, the anti-dazzle rearview mirror further comprises a rear light sensor 13, the rear light sensor 13 is installed at a position where the binding type anti-dazzle rearview mirror shell is not easy to be shielded from light, and a light sensing surface of the rear light sensor 13 faces the rear of a vehicle so as to detect light intensity from the rear of the vehicle; in another preferred embodiment, the rear camera module 12 includes a rear light sensor 13, and the rear camera module 12 is used as both a part of the rear lens module and a rear light sensor, and this preferred embodiment does not need to be additionally configured with a rear light sensor, and preferably, the image sensor is a CMOS image sensor or a CCD image sensor. In the bandage-type antiglare rearview mirror of the present embodiment, it is preferable that the lower position in the housing has a convex structural design at which the rear light sensor 13 is disposed.

As shown in fig. 5, the bandage type anti-glare rearview mirror preferably further comprises a power supply for supplying power to the control unit, and further comprises a loudspeaker 5 and a microphone 9, wherein the loudspeaker 5 and the microphone 9 are respectively used for sending and receiving sound signals. Further, in this embodiment, be equipped with the miaow head hole on the shell of bandage formula anti-dazzle rear-view mirror, the miaow head is installed inside the shell, the miaow head is connected with the control unit, after the driver sends voice command, the miaow head converts the voice signal who receives into the signal of telecommunication, the control unit receives the signal of telecommunication that the miaow head sent, the control unit sends the instruction to other parts of display module assembly or rear-view mirror after handling, realize opening/close display module assembly, adjustment visual angle, adjustment luminance, open/close video recording, playback, functions such as voice broadcast. Further, be equipped with the horn eye on the backshell of bandage formula anti-dazzle rear-view mirror, loudspeaker install inside the shell, loudspeaker and the control unit are connected, and after the control unit sent the instruction to loudspeaker, loudspeaker can be the sound signal to signal of telecommunication conversion, realized man-machine speech interaction, functions such as broadcast music, voice navigation, sound early warning suggestion.

The utility model discloses an among the bandage formula anti-dazzle rear-view mirror, further, its inside insulating adhesive tape or shielding material that is equipped with, insulating adhesive tape or shielding material parcel play insulating, shielding magnetic field, anti-electromagnetic interference's effect on electrode connecting wire surface or the electronic components surface of the control unit. Further, a power line jack is arranged on a shell of the bandage type anti-dazzle rearview mirror, a power line is connected with the control unit through the power line jack, and provides power supply conditions for the control unit, preferably, the size of the power line jack is the size of the universal specification of a USB interface or the size of the universal specification of a round power plug, preferably, the power line is a 12V to 5V step-down line, one end of the power line is connected to a 12V power supply contact of the automobile, and the other end of the power line provides 5V power supply conditions for the control unit. Further, a rear camera module patch cord jack is arranged on the casing of the bandage type anti-dazzle rearview mirror, one end of a rear camera module patch cord is connected with the rear camera module, the other end of the rear camera module patch cord is connected with the control unit through the rear camera module patch cord jack, and preferably, the size of the power cord jack is the universal specification size of a USB interface or the universal specification size of a round power plug. Furthermore, an SD card slot is arranged on the shell of the bandage type anti-dazzle rearview mirror, and the SD card is installed in the SD card slot and used for storing data recorded by the rearview mirror. Furthermore, a GPS module jack is arranged on the shell of the bandage type anti-dazzle rearview mirror, and the bandage type anti-dazzle rearview mirror can realize the GPS function through an external GPS module.

The utility model discloses in, further, be equipped with button hole and button on bandage formula anti-dazzle rear-view mirror's shell (preceding shell or backshell), the driver is controlled the rear-view mirror through the button. Furthermore, the casing of the bandage type anti-dazzle rearview mirror is provided with heat dissipation holes, and heat generated by each unit in the bandage type anti-dazzle rearview mirror is dissipated through the heat dissipation holes. Further, be equipped with other external module jacks on the shell of bandage formula anti-dazzle rear-view mirror, preferably, other external modules include OBD module, ADAS module etc.. Furthermore, bandage formula anti-dazzle rear-view mirror still includes miaow head dust screen, loudspeaker dust screen, louvre dust screen etc. for reduce outside pollutant and get into inside the bandage formula anti-dazzle rear-view mirror. Furthermore, the bandage type anti-dazzle rearview mirror further comprises a connecting line for connecting the display module and the control unit, a connecting line for connecting the loudspeaker and the control unit, a connecting line for connecting the microphone and the control unit, a connecting line for connecting the front camera module and the control unit and the like.

The working principle of the bandage-type anti-dazzle rearview mirror of the present invention is explained with reference to the accompanying drawings. Fig. 6 is a schematic diagram of an optical path when the bandage-type anti-glare rearview mirror according to an embodiment of the present invention is in a streaming media display operating state with the lowest reflectivity and the highest transmittance, as shown in fig. 6, when the display module is turned on, the control unit applies a voltage to the liquid crystal dimming layer, in fig. 6, a represents an external natural light, and a can be decomposed into polarized lights B and c perpendicular to each other, where B represents a polarized light perpendicular to an absorption axis of the absorption-type polarizing layer 11, c represents a polarized light parallel to the absorption axis of the absorption-type polarizing layer 11, a represents a polarized display light emitted by the display module, a is perpendicular to a polarization direction of a reflection axis of the reflection-type polarizing layer, and B represents a polarized light parallel to the polarization direction of the reflection axis of the reflection-type polarizing layer. When unpolarized ambient light a is incident on the absorption type polarizing layer 11, light c parallel to the absorption axis of the absorption type polarizing layer 11 is absorbed, light b perpendicular to the absorption axis of the absorption type polarizing layer 11 can be transmitted and attenuated to b1, when b1 is incident on the liquid crystal dimming layer 12, b1 can pass through the liquid crystal dimming layer 12 and be attenuated to b2, when b2 is incident on the reflection type polarizing layer 13, b2 passes through the reflection type polarizing layer 13 and be attenuated to b3, if each layer is an ideal dielectric material, the attenuation of light tends to zero, and it can be seen that the reflectance of the external reflection light source is the lowest at this time, and the reflectance is within 10%. When polarized display light A emitted by the display module is incident to the reflective polarizing layer 13, A can pass through 13 and be attenuated to A1, and when A1 is incident to the liquid crystal dimming layer 12, A1 can pass through the liquid crystal dimming layer 12 and be attenuated to A2; when a2 is incident on the absorption-type polarizing layer 11, a2 can pass through the absorption-type polarizing layer 11 and attenuate to A3, if each layer is an ideal dielectric material, the attenuation of light tends to zero, and it can be seen that the polarized light emitted by the display module can almost completely pass through the liquid crystal dimming mirror surface, and the transmittance can reach 70% -90%. At this moment the utility model discloses a bandage formula anti-dazzle rear-view mirror is the streaming media display state that the reflectivity is minimum and to display module assembly transmissivity is the highest.

Fig. 7 is the light path schematic diagram of the bandage formula anti-dazzle rear-view mirror of the specific embodiment when being in anti-dazzle state, as shown in fig. 7, when display module closes, the control unit judges whether to get into anti-dazzle state according to the signal that front light sensor and rear light sensor sent, when judging for the needs get into anti-dazzle state, the control unit applys voltage to liquid crystal dimming layer, and specular reflectivity falls to minimumly, and the reflectivity is less than 10%, and the theory of operation is as follows: as shown in fig. 7, a represents external natural light, a may be decomposed into polarized light b and c perpendicular to each other, where b represents polarized light perpendicular to the absorption axis of the absorption type polarizing layer 11, c represents polarized light parallel to the absorption axis of the absorption type polarizing layer 11, specifically, when unpolarized ambient light a is incident to the absorption type polarizing layer 11, light c parallel to the absorption axis of the absorption type polarizing layer 11 is absorbed, light b perpendicular to the absorption axis of the absorption type polarizing layer 11 may be transmitted and attenuated as b1, when b1 is incident to the liquid crystal polarizing layer 12, b1 may pass through the liquid crystal polarizing layer 12 and be attenuated as b2, when b2 is incident to the reflection type polarizing layer 13, the polarization direction of the reflection axis b2 of the reflection type polarizing layer 13 is perpendicular to each other, b2 passes through the reflection type polarizing layer 13 and is attenuated as b3, if each layer is seen as an ideal dielectric material, the attenuation of light tends to zero, it may be, at the moment, the reflectivity of an external reflection light source reaches the lowest, the reflectivity is within 10 percent, and the binding belt type anti-dazzle rearview mirror enters an anti-dazzle state with the lowest reflection.

Fig. 8 is the light path schematic diagram of bandage formula anti-dazzle rear-view mirror when the reflectivity is the highest, the minimum mirror surface state of transmissivity, as shown in fig. 8, when display module closes, the signal judgement that the control unit sent according to preceding light sensor and rear light sensor whether gets into anti-dazzle state, when judging for not needing to get into anti-dazzle state, the control unit does not adjust luminance the layer to liquid crystal and applys voltage, mirror surface reflectivity maintains the highest state, reflectivity is greater than 40%, the theory of operation is as follows: a represents external natural light, a can be decomposed into polarized light b and c which are perpendicular to each other, where b represents polarized light perpendicular to the absorption axis of the absorption type polarizing layer 11, c represents polarized light parallel to the absorption axis of the absorption type polarizing layer 11, specifically, when unpolarized ambient light a is incident on the absorption type polarizing layer 11, light c parallel to the absorption axis of the absorption type polarizing layer 11 is absorbed, light b perpendicular to the absorption axis of the absorption type polarizing layer 11 can be transmitted and attenuated as b1, when b1 is incident on the liquid crystal dimming layer 12, the liquid crystal dimming layer 12 rotates the polarization direction of b1 by 90 degrees and then attenuates as c1, when c1 is incident on the reflection type polarizing layer 13, the reflection axis of the reflection type polarizing layer 13 is parallel to the polarization direction of c1, c1 is reflected by the reflection type polarizing layer 13 back to the liquid crystal dimming layer 12, when c1 is incident on the liquid crystal dimming layer 12, the polarization direction of the liquid crystal dimming layer 12 rotates the polarization direction of c1 by 90 degrees and then attenuates as b2, b2 is incident on the absorption type polarizing layer 11, b2 can pass through the absorption type polarizing layer 11 and attenuate to b3, if each layer is an ideal dielectric material, the attenuation of light tends to zero, it can be seen that the external reflection light source reflectivity reaches the highest, and the reflectivity is more than 40%, and at this time, the rear-view mirror presents the mirror surface state with the highest reflection.

The utility model discloses in, the absorption axis polarization direction on absorption type polarisation layer and the reflection axis polarization direction on reflection-type polarisation layer are parallel to each other or mutually perpendicular, the absorption axis polarization direction on absorption type polarisation layer and the reflection axis polarization direction on reflection-type polarisation layer adopt the mode of being parallel to each other or mutually perpendicular to decide according to the different liquid crystal material that the liquid crystal dimming layer chose for use, for example choose the liquid crystal material of TN type in the liquid crystal dimming layer, then the absorption axis polarization direction on absorption type polarisation layer and the reflection axis polarization direction on reflection-type polarisation layer adopt mutually parallel, if select the liquid crystal material of VA type in the liquid crystal dimming layer, then the absorption axis polarization direction on absorption type polarisation layer and the reflection axis polarization direction on reflection-type polarisation layer adopt mutually perpendicular, no longer give unnecessary details.

Compared with the traditional streaming media rearview mirror, the bandage type anti-dazzle rearview mirror solves the problem of double images, the mirror surface of the traditional streaming media rearview mirror is made of semi-transparent semi-reflecting glass, the reflectivity of the glass is more than 40% and cannot be adjusted, and when the rear road condition information is observed through a display module, the double image phenomenon that a reflection image and a display image interfere with each other can be caused by the reflection; the utility model discloses in adopted the liquid crystal technique of adjusting luminance, when surveing rear road conditions information through display screen, the reflectivity of mirror surface can reduce to within 10% automatically, the reflection image's that significantly reduces luminance to solve the ghost image problem. Additionally, the utility model discloses bandage formula anti-dazzle rear-view mirror still has the advantage that luminance is high, and the luminousness of traditional streaming media rear-view mirror is less than 60% usually, causes the problem that shows luminance is low, and the utility model discloses a bandage formula anti-dazzle rear-view mirror's luminousness can automatically regulated to more than 70%, has improved display screen's light source utilization ratio to improve and show luminance, reduce simultaneously and generate heat, reduce cost, safe and reliable more. The utility model discloses a bandage formula anti-dazzle rear-view mirror adopts the mode of installation back of the body hook and bandage, is convenient for change and installation, and applicable in the installation of various motorcycle type special car special stand, also can save the dismantlement process of former dress mirror. In a word, the utility model discloses a bandage formula anti-dazzle rear-view mirror does not have the ghost image, anti-dazzle fast to the installation is simple and easy convenient.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. A bandage-type antiglare rearview mirror, comprising:

a housing;

an absorption-type polarizing layer;

a liquid crystal dimming layer disposed under the absorption type polarizing layer in size correspondence with the absorption type polarizing layer;

a reflective polarizing layer disposed under the liquid crystal dimming layer in conformity with a size of the liquid crystal dimming layer, an absorption axis polarization direction of the absorptive polarizing layer and a reflection axis polarization direction of the reflective polarizing layer being parallel or perpendicular to each other;

the back hook is detachably fixed on the back of the shell, and the bandage is matched with the back hook and is detachably connected up and down;

the liquid crystal dimming layer comprises a first transparent substrate, a first transparent electrode, a first alignment layer, a liquid crystal layer, a second alignment layer, a second transparent electrode and a second transparent substrate which are sequentially arranged, the first transparent substrate is positioned at one side close to the absorption type polarizing layer, one side of the shell facing an observer is provided with a hemming portion extending towards the inside of the shell, and the absorption type polarizing layer, the liquid crystal dimming layer and the reflection type polarizing layer are all positioned in the shell and fixed in position by the hemming portion.

2. The bandage-type anti-glare rearview mirror according to claim 1, further comprising at least one light sensor that detects a change in ambient light and feeds back information to the control unit, and a control unit that electrically controls adjustment of a voltage applied to the liquid crystal layer according to the information.

3. The bandage-type anti-glare rearview mirror according to claim 2, further comprising a display module located on a side of the reflective polarizing layer facing away from the liquid crystal dimming layer, the display module being located in the housing together with the absorptive polarizing layer, the liquid crystal dimming layer and the reflective polarizing layer and fixed in position by the edge covering part.

4. The bandage-type anti-glare rearview mirror according to claim 3, wherein the outer shell comprises a front shell facing a viewer and a rear shell facing away from the viewer, the wrapping portion is located on the front shell, the front shell further comprises at least one buckle, and the edge of the display module is clamped in the buckle.

5. The bandage-type anti-glare rearview mirror according to claim 3, further comprising a dustproof sponge or adhesive layer between the reflective polarizing layer and the display module.

6. The bandage-type anti-glare rearview mirror according to claim 3, further comprising a front camera module, a front camera patch cord, a rear camera module, and a rear camera patch cord, wherein the front camera module is connected to the control unit through the front camera patch cord, and the rear camera module is connected to the control unit through the rear camera patch cord.

7. The bandage-type anti-glare rearview mirror according to claim 6, wherein a front light sensor is included in the front camera module and/or a rear light sensor is included in the rear camera module.

8. The bandage-type anti-glare rearview mirror according to claim 1, further comprising a speaker and a microphone for emitting and receiving sound signals.

9. The bandage-type antiglare rearview mirror of claim 1, further comprising a key on the housing.

10. The bandage-type antiglare rearview mirror of claim 1, further comprising a special vehicle-specific back plate and/or a special vehicle-specific bracket fixedly detachably attached to a side of the housing facing away from the observer.