CN211375254U

CN211375254U - Automatic anti-dazzle automobile electronic rearview mirror

Info

Publication number: CN211375254U
Application number: CN202020012988.4U
Authority: CN
Inventors: 郭建新; 邓树端
Original assignee: Huizhou Desay SV Automotive Co Ltd
Current assignee: Huizhou Desay SV Automotive Co Ltd
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2020-08-28
Anticipated expiration: 2030-01-02

Abstract

The utility model relates to an automatic anti-dazzle automotive electronics rear-view mirror comprises eight layers, include in the past to the back in proper order, glass apron, preceding glass substrate, first transparent conducting layer, first inhomogeneous vertical orientation layer, the stable liquid crystal of polymer network, the inhomogeneous vertical orientation layer of second, conductive reflection layer, back glass substrate, the lead terminal of first transparent conducting layer, the one end of the outside electric field of electricity connection, the lead terminal of conductive reflection layer, the other end of the outside electric field of electricity connection, under the effect of outside electric field, the scattering strength of control liquid crystal realizes the anti-dazzle function. The utility model discloses response time is fast, can in time anti-dazzle, and when using as the speculum, the reflectivity is close 100%, and driving voltage is minimum.

Description

Automatic anti-dazzle automobile electronic rearview mirror

Technical Field

The utility model relates to an on-vehicle accessory product field of making especially relates to an automatic anti-dazzle automotive electronics rear-view mirror.

Background

Generally, an automatic anti-glare rearview mirror inside (and/or outside) a vehicle is installed, and an electrochromic technical scheme or a liquid crystal display technical scheme is adopted.

(1) Electrochromic scheme:

the electrochromic lens is formed by filling electrochromic solution between two pieces of glass with a conductive function. In the normal state, the cathode in the electrochromic solution is in a colorless oxidation state, and the anode is in a yellowish normal state. When the conducting layer is applied with a direct current bias, the cathode obtains electrons from the negative electrode of the power supply to be in a reduced state and is converted into blue from a colorless state, and the anode releases electrons from the positive electrode of the power supply to be converted into an oxidized state and is converted into yellow from the colorless state. The color obtained by vision when the two colors are mixed is dark green. Because the color of the electrochromic solution is changed, a light absorption effect is generated, and the reflectivity is reduced along with the bias voltage, so that the effect of glare resistance is achieved.

The disadvantages of the existing electrochromic schemes are:

(1) first, the response time is slow (even at room temperature, a cycle of maximum → minimum → maximum requires tens of seconds, even up to 30 seconds at low temperature.

(2) Second, the reflected color changes with voltage, not a monochrome change of black and gray.

This solution is gradually replaced by liquid crystal display solutions.

2. The technical scheme of the liquid crystal display is as follows:

the liquid crystal material is placed between two transparent electrodes, and the arrangement of the liquid crystal material is changed by an electric field applied between the electrodes, thereby influencing the state of reflected light. The method can be divided into two schemes, one is that the polarization state of reflected light is changed by means of various types of polaroids, and then the intensity of light is changed; another class is polymer dispersed liquid crystal (i.e. PDLC) schemes where the scattering properties of the liquid crystal material are controlled by voltage without the aid of any polarisers.

The disadvantages of the former prior art liquid crystal display scheme are: the intensity of reflected light in non-glare light is reduced due to the absorption of the polarizer;

the disadvantages of the latter prior art liquid crystal display scheme are: the strongest anti-glare state is achieved when no electric field is applied, and the driving voltage is too high.

In order to solve the problem, the utility model provides an automatic anti-dazzle automobile electronic rearview mirror.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an invention aim at solve current electrochromic scheme and have response time slow, be difficult to in time play anti-dazzle, the existing absorption that takes the partial piece liquid crystal disply scheme to have the polaroid can weaken the reverberation intensity when non-anti-dazzle, does not take partial piece liquid crystal disply scheme to exist and be strongest anti-dazzle state, the too high problem of its driving voltage when not adding the electric field now. The concrete solution is as follows:

alternative 1:

the utility model provides an automatic anti-dazzle automotive electronics rear-view mirror, comprises eight layers, include in proper order from the past to the back, glass apron, preceding glass substrate, first transparent conducting layer, first inhomogeneous vertical orientation layer, the stable liquid crystal of polymer network, the inhomogeneous vertical orientation layer of second, conductive reflection layer, back glass substrate, the pin end of first transparent conducting layer, the one end of external electric field is connected to the electricity, the pin end of conductive reflection layer, the other end of external electric field is connected to the electricity, under the effect of external electric field, the scattering strength of control liquid crystal, realize the anti-dazzle function.

The glass cover plate is positioned at the foremost end of the rearview mirror and plays a role in protection and light transmission;

the front glass substrate forms a supporting unit of the liquid crystal device and has a transparent function;

the first transparent conducting layer is deposited on the front glass substrate and used for applying a driving electric field to the liquid crystal layer;

the conductive reflecting layer is deposited on the rear glass substrate, is used for applying a driving electric field to the liquid crystal layer and has a light reflecting effect;

the first non-uniform vertical orientation layer and the second non-uniform vertical orientation layer are non-uniform thickness layers respectively formed on the first transparent conducting layer and the conducting reflecting layer and have the function of enabling liquid crystals to be arranged perpendicular to the substrate;

the polymer network stabilized liquid crystal is positioned between the first non-uniform vertical orientation layer and the second non-uniform vertical orientation layer, is negative liquid crystal, is arranged perpendicular to the substrate when an external electric field is not applied, is incompletely divided into liquid crystal droplets by the polymer network, and has the characteristic of changing the electric field.

The thickness difference of the first non-uniform vertical orientation layer and the second non-uniform vertical orientation layer is 40-200 nanometers, and the distribution frequency along the layer surface is 1/8-1/12 micrometers. The polymer network stabilizes liquid crystal, the liquid crystal content is 95%, and the polymer content is 5%. The highest driving voltage of the external electric field is 10-20V. The front surface of the glass cover plate is provided with or not provided with an antireflection coating.

Alternative 2:

the utility model provides an automatic anti-dazzle automotive electronics rear-view mirror, constitute by nine layers, include in proper order from the past to the back, glass apron, preceding glass substrate, first transparent conducting layer, first inhomogeneous vertical orientation layer, the stable liquid crystal of polymer network, the inhomogeneous vertical orientation layer of second, the transparent conducting layer of second, back glass substrate, the reflection stratum, the lead wire end of first transparent conducting layer, the one end of external electric field is connected to the electricity, the lead wire end of the transparent conducting layer of second, the other end of external electric field is connected to the electricity, under the effect of external electric field, the scattering intensity of control liquid crystal, realize the anti-dazzle function.

the first transparent conducting layer and the second transparent conducting layer are respectively deposited on the front glass substrate and the rear glass substrate and are used for applying a driving electric field to the liquid crystal layer;

the first non-uniform vertical orientation layer and the second non-uniform vertical orientation layer are non-uniform thickness layers respectively formed on the first transparent conducting layer and the second transparent conducting layer and have the effect of enabling liquid crystals to be arranged perpendicular to the substrate;

the polymer network stabilized liquid crystal is positioned between the first non-uniform vertical orientation layer and the second non-uniform vertical orientation layer, is negative liquid crystal, is arranged perpendicular to the substrate when an external electric field is not applied, is incompletely divided into liquid crystal droplets by the polymer network, and has the change characteristic to the electric field;

the reflecting layer is deposited on the back surface of the back glass substrate and used for reflecting light.

To sum up, adopt the utility model discloses a technical scheme has following beneficial effect:

the utility model provides a current electrochromic scheme have response time slower, be difficult to in time play anti-dazzle, have the absorption of polaroid in the current partial liquid crystal display scheme of taking, can weaken the reverberation intensity when non-anti-dazzle, do not take partial liquid crystal display scheme to exist when not adding the electric field for strongest anti-dazzle state, the too high problem of its driving voltage now. The utility model discloses a polymer network of reverse mode stabilizes liquid crystal (that is PNSLC) design, does not need the polaroid subassembly, through the scattering strength of electric field control liquid crystal, and its reflection colour basically maintains the monochromatic state between black and white reaches, and when not adding the electric field moreover, its reflectivity is minimum, is unanimous basically with conventional interior rear-view mirror. Compared with electrochromic schemes and other liquid crystal technical schemes, the utility model has the advantages that:

(1) for electrochromic scheme, the utility model discloses a response time is fast, can in time anti-dazzle.

(2) Compared with the technical scheme of liquid crystal using a polaroid, the liquid crystal display has larger reflectivity when used as a reflector. And the liquid crystal scheme of current polaroid, the reflectivity is 45% at most generally, the utility model discloses can approach 100%.

(3) For current polymer dispersed liquid crystal (also be PDLC) scheme, when using as the speculum, the utility model discloses a driving voltage is minimum driving state (0V, when not starting the car promptly, is exactly an ideal speculum), and current PDLC scheme is the highest driving voltage state, in addition, the utility model discloses a maximum driving voltage is about 10 ~ 20V, and current PDLC is 60V.

In a word, the utility model discloses response time is fast, can in time anti-dazzle, and when using as the speculum, the reflectivity is close 100%, and driving voltage is minimum.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed to be used in the description of the embodiments of the present invention will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive faculty.

FIG. 1 is a schematic view of an embodiment 1 of an automatic anti-glare electronic rearview mirror for an automobile;

FIG. 2 is a structural diagram of an embodiment 2 of an automatic anti-glare electronic rearview mirror for an automobile;

FIG. 3 is a schematic view of the present invention as a reflector;

fig. 4 is a schematic diagram of the automatic glare prevention of the present invention.

The attached drawings indicate the following:

1-glass cover plate, 2-front glass substrate, 3-first transparent conducting layer, 4-first non-uniform vertical orientation layer, 5-polymer network stabilized liquid crystal, 6-second non-uniform vertical orientation layer, 7-conductive reflecting layer, 8-rear glass substrate, 9-second transparent conducting layer, 10-reflecting layer, 51-polymer network, 52-liquid crystal microdroplet, A-glass substrate with conducting layer, B-non-uniform thickness vertical orientation layer, E-external electric field.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1:

as shown in fig. 1, an automatic anti-glare electronic rearview mirror for automobiles comprises eight layers, which sequentially comprises a glass cover plate 1, a front glass substrate 2, a first transparent conductive layer 3, a first non-uniform vertical alignment layer 4, a polymer network stabilized liquid crystal 5, a second non-uniform vertical alignment layer 6, a conductive reflection layer 7, a rear glass substrate 8, a lead end of the first transparent conductive layer 3, one end of an external electric field E is electrically connected, a lead end of the conductive reflection layer 7 is electrically connected with the other end of the external electric field E, and under the action of the external electric field E, the scattering intensity of the liquid crystal is controlled, so that the anti-glare function is realized.

The glass cover plate 1 is positioned at the foremost end of the rearview mirror and plays a role in protection and light transmission;

a front glass substrate 2 constituting a supporting unit of the liquid crystal device and having a transparent function;

a first transparent conductive layer 3 deposited on the front glass substrate 2 for applying a driving electric field to the liquid crystal layer (i.e., polymer network stabilized liquid crystal 5);

a conductive reflective layer 7 deposited on the rear glass substrate 8 for applying a driving electric field to the liquid crystal layer and having a light reflection function;

the first non-uniform vertical alignment layer 4 and the second non-uniform vertical alignment layer 6 are non-uniform thickness layers respectively formed on the first transparent conductive layer 3 and the conductive reflective layer 7, and have the function of enabling liquid crystals to be arranged vertical to the substrates (including the front glass substrate 2 and the rear glass substrate 8);

the polymer network stabilized liquid crystal 5 is positioned between the first non-uniform vertical alignment layer 4 and the second non-uniform vertical alignment layer 6, is negative liquid crystal, is arranged vertical to the substrate when no external electric field E is applied, is incompletely separated into liquid crystal droplets 52 by the polymer network 51, and has a variable characteristic to the electric field.

The first non-uniform vertical alignment layer 4 and the second non-uniform vertical alignment layer 6 have a thickness difference of 40-200 nm, and a distribution frequency along a layer surface is 1/8-1/12 microns. The polymer network stabilizes liquid crystal 5, with a liquid crystal content of 95% and a polymer content of 5%. The maximum driving voltage of the external electric field E is 10-20V. An antireflection coating (not shown) may be added on the front surface of the glass cover plate 1, so that the anti-glare effect is better. Of course, this antireflection coating may not be added, depending on the needs of the particular rearview mirror product.

Example 2:

as shown in fig. 2, an automatic anti-glare electronic rearview mirror for automobiles comprises nine layers, which sequentially comprises a glass cover plate 1, a front glass substrate 2, a first transparent conductive layer 3, a first non-uniform vertical alignment layer 4, a polymer network stabilized liquid crystal 5, a second non-uniform vertical alignment layer 6, a second transparent conductive layer 9, a rear glass substrate 8, a reflective layer 10, a lead end of the first transparent conductive layer 3, one end electrically connected with an external electric field E, a lead end of the second transparent conductive layer 9, and the other end electrically connected with the external electric field E, wherein under the action of the external electric field E, the scattering intensity of the liquid crystal is controlled, and the anti-glare function is realized.

a first transparent conductive layer 3 and a second transparent conductive layer 9 respectively deposited on the front glass substrate 2 and the rear glass substrate 8 for applying a driving electric field to the liquid crystal layer (i.e. the polymer network stabilized liquid crystal 5);

the first non-uniform vertical alignment layer 4 and the second non-uniform vertical alignment layer 6 are non-uniform thickness layers respectively formed on the first transparent conductive layer 3 and the second transparent conductive layer 9, and have the function of enabling liquid crystals to be arranged vertical to the substrate;

the polymer network stabilized liquid crystal 5 is positioned between the first non-uniform vertical alignment layer 4 and the second non-uniform vertical alignment layer 6, is negative liquid crystal, is arranged perpendicular to the substrate when an external electric field E is not applied, is incompletely divided into liquid crystal droplets 52 by the polymer network 51, and has the change characteristic to the electric field;

and a reflective layer 10 deposited on the back surface of the rear glass substrate 8 for light reflection.

The first non-uniform vertical alignment layer 4 and the second non-uniform vertical alignment layer 6 have a thickness difference of 40-200 nm, and a distribution frequency along a layer surface is 1/8-1/12 microns. The polymer network stabilizes liquid crystal 5, with a liquid crystal content of 95% and a polymer content of 5%. The maximum driving voltage of the external electric field E is 10-20V. The front surface of the glass cover plate 1 is provided with or without an antireflection coating (if an antireflection coating is added according to specific needs, the anti-glare effect is better).

As shown in fig. 3, a schematic view of the present invention as a mirror is shown. The uppermost layer in the figure is a glass substrate A with a conductive layer (referred to as a front glass substrate 2 and a first transparent conductive layer 3), the inner side of the glass substrate A with the conductive layer is a vertical alignment layer B with non-uniform thickness (referred to as a first non-uniform vertical alignment layer 4), and a polymer network stabilized liquid crystal 5 is arranged between the vertical alignment layers B with upper and lower non-uniform thicknesses (i.e. the first non-uniform vertical alignment layer 4 and a second non-uniform vertical alignment layer 6), and the liquid crystal droplets 52 and a polymer network 51 are included in the liquid crystal. When no external electric field E is applied, the liquid crystal droplets 52 are aligned perpendicular to the substrate, are transparent to the external light, and the light entering the mirror through the cover plate (i.e., the glass cover plate 1) is finally reflected by the reflective layer 10 (for example 2) (for example 1, the conductive reflective layer 7) and exits through the optical layers. In this state, the specular reflectance is maximized and can approach 100%, which is an ideal mirror.

As shown in fig. 4, a schematic diagram of the automatic anti-glare device of the present invention is shown. The specular reflectivity gradually decreases to the lowest as the external electric field E gradually increases, and the anti-glare is the best when the external electric field E is the largest.

When an external electric field E is applied, the alignment of the liquid crystal molecules changes, forming randomly aligned liquid crystal domains (i.e., liquid crystal droplets 52) that scatter light. In this case, the component (referred to as a rearview mirror) has both a specular reflection effect and a scattering effect on light. When the external electric field E is larger, the scattering effect is stronger, and light rays are reflected to all directions, so that the light intensity directly reflected to human eyes is lower, and the purpose of glare resistance is realized.

Example 1 the manufacturing method is as follows:

step 1, preparing a glass substrate, manufacturing a first transparent conductive layer 3 on a front glass substrate 2 by a magnetron sputtering method, and manufacturing a conductive reflecting layer 7 with a conductive function on a rear glass substrate 8 by a magnetron sputtering or evaporation method;

step 2, preparing a solution I, and mixing a small amount of vertically oriented polyimide into N-methylpyrrolidone;

step 3, preparing a second solution, wherein the second solution is composed of a UCL017 reaction monomer and a small amount of photoinitiator;

step 4, preparing a solution III, and fully mixing the solution I and the solution II according to the mass ratio of 1: 25;

step 5, coating the solution tee on a first transparent conductive layer 3 or a conductive reflecting layer 7 of a glass substrate (comprising a front glass substrate 2 and a rear glass substrate 8) by a coating method to form a smooth film layer;

step 6, preheating the smooth film layer to a certain temperature (such as 80 ℃) for a period of time, and then slowly cooling; in the process of cooling, the surface of the smooth film layer is gradually changed into a film layer with non-uniform thickness;

step 7, irradiating the non-uniform thickness film layer by ultraviolet rays to cure the film layer to prepare a composite glass substrate compounded with the first transparent conductive layer 3 or the conductive reflecting layer 7 and the non-uniform vertical orientation layer (the first non-uniform vertical orientation layer 4 or the second non-uniform vertical orientation layer 6);

step 8, the composite glass substrate in the step 7, namely the front glass substrate 2 and the rear glass substrate 8 face to face, and a liquid crystal box is manufactured by using the common liquid crystal display manufacturing technology;

step 9, injecting liquid crystal and polymer monomers, mixing 95% of negative liquid crystal and 5% of reaction monomers with a small amount of photoinitiator, and injecting the mixture into the liquid crystal box prepared in the step 8 in a vacuum injection mode;

step 10, curing the reaction monomer in the step 9 in an ultraviolet curing mode, and sealing the liquid crystal injection opening with glue;

and step 11, finally, manufacturing lead terminals of the first transparent conductive layer 3 and the conductive reflective layer 7.

Further:

in the step 1, the first transparent conducting layer 3 is formed by processing and manufacturing a layer of indium tin oxide film (also called ITO);

the coating method in the step 5 is rotary coating or printing coating;

in the step 8, in the manufacturing technology of the liquid crystal display, the first non-uniform vertical orientation layer 4 and the second non-uniform vertical orientation layer 6 of the front glass substrate 2 and the rear glass substrate 8 are alternately supported by silicon spheres or glass fibers, the two are bonded together by the frame sealing glue on the periphery, but the frame sealing glue is not completely closed, and a certain width is reserved for injecting liquid crystal materials.

Example 2 the manufacturing method is as follows:

step 1, preparing a glass substrate, manufacturing a first transparent conducting layer 3 on a front glass substrate 2 by a magnetron sputtering method, manufacturing a second transparent conducting layer 9 on a rear glass substrate 8, and manufacturing a reflecting layer 10 on the back of the rear glass substrate 8 by a magnetron sputtering or evaporation method;

step 2, preparing a solution I, mixing a small amount of vertically oriented polyimide (Nissan Chemical, model SE-4811) into N-Methyl pyrrolidone (N-Methyl-2-pyrollidone, namely NMP);

step 3, preparing a second solution, wherein the second solution is composed of UCL017(DIC Corp.) reaction monomers and a small amount of photoinitiator;

step 5, coating the solution tee on a first transparent conducting layer 3 or a second transparent conducting layer 9 of a glass substrate (comprising a front glass substrate 2 and a rear glass substrate 8) by a coating method to form a smooth film layer;

step 7, irradiating the non-uniform thickness film layer by using ultraviolet rays to cure the film layer, and manufacturing a composite glass substrate compounded with the first transparent conductive layer 3 or the second transparent conductive layer 9 and a non-uniform vertical orientation layer (namely the first non-uniform vertical orientation layer 4 or the second non-uniform vertical orientation layer 6);

step 8, making the composite glass substrate in the step 7 into a liquid crystal box by using a common liquid crystal display manufacturing technology;

and 11, finally manufacturing lead terminals of the first transparent conductive layer 3 and the second transparent conductive layer 9.

Further:

in the step 1, the first transparent conducting layer 3 or the second transparent conducting layer 9 is formed by processing and manufacturing a layer of indium tin oxide film (also called ITO);

the coating method in the step 5 is rotary coating or printing coating;

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. The utility model provides an automatic anti-dazzle automotive electronics rear-view mirror, comprises eight layers which characterized in that: include in proper order from the past to the back, glass apron, preceding glass substrate, first transparent conducting layer, first inhomogeneous vertical orientation layer, polymer network stabilization liquid crystal, second inhomogeneous vertical orientation layer, conductive reflection layer, back glass substrate, the lead terminal of first transparent conducting layer, the one end of electricity connection outside electric field, the lead terminal of conductive reflection layer, the other end of electricity connection outside electric field, under the effect of outside electric field, the scattering strength of control liquid crystal realizes the anti-dazzle function.

2. The automatic anti-glare electronic rearview mirror for automobiles according to claim 1, wherein:

3. The automatic anti-glare electronic rearview mirror for automobiles according to claim 2, wherein: the thickness difference of the first non-uniform vertical orientation layer and the second non-uniform vertical orientation layer is 40-200 nanometers, and the distribution frequency along the layer surface is 1/8-1/12 micrometers.

4. The automatic anti-glare electronic rearview mirror for automobiles of claim 3, wherein: the polymer network stabilizes liquid crystal, the liquid crystal content is 95%, and the polymer content is 5%; the highest driving voltage of the external electric field is 10-20V.

5. The automatic anti-glare electronic rearview mirror for automobiles of claim 4, wherein: the front surface of the glass cover plate is provided with or not provided with an antireflection coating.

6. The utility model provides an automatic anti-dazzle automotive electronics rear-view mirror, comprises nine layers which characterized in that: include in proper order from the past to the back, glass apron, preceding glass substrate, first transparent conducting layer, first inhomogeneous vertical orientation layer, the stable liquid crystal of polymer network, the inhomogeneous vertical orientation layer of second, the transparent conducting layer of second, back glass substrate, reflection stratum, the lead terminal of first transparent conducting layer, the one end of electric connection outside electric field, the lead terminal of the transparent conducting layer of second, the other end of electric connection outside electric field, under the effect of outside electric field, the scattering intensity of control liquid crystal realizes the anti-dazzle function.

7. The automatic anti-glare electronic rearview mirror for automobiles of claim 6, wherein:

8. The automatic anti-glare electronic rearview mirror for automobiles of claim 7, wherein: the thickness difference of the first non-uniform vertical orientation layer and the second non-uniform vertical orientation layer is 40-200 nanometers, and the distribution frequency along the layer surface is 1/8-1/12 micrometers.

9. The automatic anti-glare electronic rearview mirror for automobiles of claim 8, wherein: the polymer network stabilizes liquid crystal, the liquid crystal content is 95%, and the polymer content is 5%; the highest driving voltage of the external electric field is 10-20V.

10. The automatic anti-glare electronic rearview mirror for automobiles of claim 9, wherein: the front surface of the glass cover plate is provided with or not provided with an antireflection coating.