WO2021258930A1

WO2021258930A1 - Sun visor, front windshield, and vehicle

Info

Publication number: WO2021258930A1
Application number: PCT/CN2021/094614
Authority: WO
Inventors: 李文波; 刘恺然
Original assignee: 京东方科技集团股份有限公司; 北京京东方技术开发有限公司
Priority date: 2020-06-24
Filing date: 2021-05-19
Publication date: 2021-12-30
Also published as: CN212353566U

Abstract

A sun visor, a front windshield, and a vehicle. The sun visor comprises: a sun visor body (1). The sun visor body comprises: a first transparent substrate (11) and a second transparent substrate (12) which are oppositely arranged, a transparent electrode layer (13) and a liquid crystal layer (14) which are provided between the first transparent substrate and the second transparent substrate, a semi-transparent semi-reflective film (15) provided on the first transparent substrate, and a polarizer (16) provided on the second transparent substrate, a transmission axis of the semi-transparent semi-reflective film being perpendicular to a transmission axis of the polarizer. When the sun visor is not powered on, one surface of the sun visor can reflect part of sunlight and has the sun-shading effect, and the other surface is transparent so that the sight of a driver or a co-driver in a vehicle is not affected. When the sun visor is powered on, the sun-shading rate can be improved, and the sun visor can be used as a mirror surface.

Description

Sun visor, front windshield and vehicle

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 202021204766.9 filed in China on June 24, 2020, the entire content of which is incorporated herein by reference.

Technical field

The embodiment of the utility model relates to the technical field of vehicles, in particular to a sun visor, a front windshield and a vehicle.

Background technique

Sun visors are often used to block the light in vehicle driving, but while blocking the light, it also blocks a part of the driver's line of sight, which affects driving safety and brings great distress to the driver.

Utility model content

The embodiment of the utility model provides a sun visor, a front windshield and a vehicle, which are used to solve the problem that the existing vehicle sun visor blocks part of the driver's line of sight and affects driving safety.

In order to solve the above technical problems, the present utility model is realized as follows:

In the first aspect, an embodiment of the present invention provides a sun visor, including:

A sun visor body, the sun visor body includes: a first transparent substrate and a second transparent substrate disposed oppositely, a transparent electrode layer and a liquid crystal layer disposed between the first transparent substrate and the second transparent substrate are disposed in the The transflective film on the first transparent substrate is a polarizer provided on the second transparent substrate, and the transmission axis of the transflective film is perpendicular to the transmission axis of the polarizer.

Optionally, the sun visor further includes:

The control board is connected to the transparent electrode layer and is used to input a driving voltage to the transparent electrode layer to drive the deflection of liquid crystal molecules in the liquid crystal layer.

Optionally, the sun visor further includes:

The photosensitive sensor is connected to the control main board and is used to sense the intensity of the ambient light;

The control board inputs the driving voltage to the transparent electrode layer when the intensity of the ambient light sensed by the photosensitive sensor is greater than or equal to a first preset threshold.

Optionally, the sun visor further includes:

The solar battery device is connected to the control main board and is used for supplying power to the control main board.

Optionally, the solar cell device is multiplexed as a photosensitive sensor; the control board inputs the driving voltage to the transparent electrode layer when the current converted by the solar cell device is greater than or equal to a second preset threshold.

Optionally, the sun visor further includes:

The connecting mechanism is connected to one side of the sun visor body and is used to connect the sun visor body to the vehicle body.

Optionally, the connection mechanism includes:

A bracket, connected to one side of the sun visor body;

Two pendants are respectively connected to the two ends of the bracket for connecting with the vehicle body.

Optionally, the sun visor further includes:

The transparent protective structure is arranged on at least two opposite sides of the sun visor body.

In a second aspect, an embodiment of the present invention provides a front windshield, including a shading area and a non-shading area, the shading area is provided with a sun visor, and the sun visor includes:

Optionally, the sun visor further includes:

Optionally, the solar cell device is multiplexed as a photosensitive sensor.

In a third aspect, an embodiment of the present invention provides a vehicle including the sun visor of the first aspect described above, or the front windshield of the second aspect described above.

When the sun visor in the utility model is not powered on, one side can reflect part of the sunlight and has a shading effect, and the other side is transparent, which does not affect the sight of the driver or co-pilot in the vehicle. When the power is on, it can increase the shading rate, and it can also be used as a mirror at the same time.

Description of the drawings

By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only used for the purpose of illustrating the preferred embodiments, and are not considered as a limitation to the present utility model. Also, throughout the drawings, the same reference symbols are used to denote the same components. In the attached picture:

Figure 1 is a schematic structural diagram of a sun visor according to an embodiment of the utility model;

Figure 2 is a schematic diagram of the structure of the sun visor main body of an embodiment of the utility model;

Figure 3 is a schematic diagram of the light path of the sun visor according to an embodiment of the utility model when it is not powered on;

Figure 4 is a schematic diagram of the light path of the sun visor of an embodiment of the utility model when power is on;

Figure 5 is a schematic structural diagram of a sun visor according to another embodiment of the utility model;

Figure 6 is a schematic structural diagram of a sun visor according to another embodiment of the utility model;

Fig. 7 is a schematic structural diagram of a front windshield according to an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, not all of them. . Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

In order to solve the problem that the existing vehicle sun visor obscures a part of the driver’s line of sight and affects driving safety, please refer to Figures 1 and 2. This utility model provides a sun visor, including: a sun visor body 1, the sun visor body 1 includes: a first transparent substrate 11 and a second transparent substrate 12 disposed oppositely, a transparent electrode layer 13 and a liquid crystal layer 14 disposed between the first transparent substrate 11 and the second transparent substrate 12, disposed on the first transparent substrate 11 and the second transparent substrate 12; A transflective film 15 on a transparent substrate 11, a polarizer 16 on the second transparent substrate 12, the transmission axis of the transflective film 15 and the transmission axis of the polarizer 16 vertical.

The first transparent substrate 11 and the second transparent substrate 12 may be glass substrates or transparent substrates of other materials. When the first transparent substrate 11 and the second transparent substrate 12 are glass substrates, optionally, the glass substrate may be explosion-proof glass, or the sun visor further includes: an explosion-proof film, which is pasted on the glass substrate .

The sun visor body includes two transparent electrode layers 13. In the embodiment shown in FIG. 1, one of the two transparent electrode layers 13 is located on the first transparent substrate 11, and the other layer is located on the second transparent substrate. 12, in some other embodiments of the present invention, it is also possible that the two transparent electrode layers 13 are both located on the same transparent substrate, and the two transparent electrode layers 13 are insulated by an insulating layer.

The transflective film 15 can transmit part of light and reflect part of light, for example, transmit 50% of light and reflect 50% of light. The transflective film 15 may be provided on the side of the first transparent substrate 11 away from the second transparent substrate 12, or may be provided on the side of the first transparent substrate 11 close to the second transparent substrate 12 , The present invention is not limited.

The polarizer 16 may be provided on the side of the second transparent substrate 12 away from the first transparent substrate 11, or may be provided on the side of the second transparent substrate 12 close to the first transparent substrate 11. The new model is not limited.

The following examples illustrate the working principle of the sun visor body 1 of the present invention.

Please refer to 3. The body of the sun visor in Figure 3 is a TN (twisted nematic) device. Other types of devices such as IPS (planar conversion), VA (multi-quadrant vertical alignment) and other devices have similar working principles, so they will not be explained one by one. .

Figure 3 shows the working state of the sun visor body 1 when it is not powered on. When the sunlight outside the car reaches the transflective film 15, part of the light (P polarized light) is reflected, and part of the light (S polarized light) is transmitted (and The transmission axis of the semi-transparent film 15 is parallel), the polarization direction of the transmitted S-polarized light is consistent with the arrangement direction of the liquid crystal molecules close to the first transparent substrate 11, and the polarization direction of the S-polarized light passes through the entire liquid crystal layer 14. As the liquid crystal molecules are twisted and deformed, they are twisted by 90°. After being twisted by 90°, they become P-polarized light, which is parallel to the transmission axis of the polarizer 16, so that the sun visor body can be emitted, and the sun visor body is in a light-transmitting state. Part of the sunlight outside the car is reflected, so the sun visor body has a shading effect and is in a low shading state. At the same time, part of the light can pass through the sun visor body. The sun visor body is in a light-transmitting state and does not affect the driver or The first officer's sight.

Figure 4 shows the working state when the sun visor body 1 is powered on. After the sun visor body 1 is powered on, the liquid crystal molecules of the liquid crystal layer 14 are deflected. When the external sunlight reaches the transflective film 15, part of the light (P polarized light) Part of the light (S-polarized light) is reflected (parallel to the transmission axis of the semi-transparent film 15). Due to the deflection of the liquid crystal molecules of the liquid crystal layer 14, the 90° optical rotation function disappears, and the transmitted S-polarized light directly passes through the liquid crystal The layer 14 reaches the polarizer 16. Since the S polarized light is perpendicular to the transmission axis of the polarizer 16, it cannot pass through the polarizer 16, which improves the shading rate of the sun visor body 1 to a maximum of 90%. The sun visor is high The light-shielding state can effectively block the sunlight. In addition, when the P-polarized light after passing through the polarizer 16 in the vehicle reaches the semi-transparent and semi-reflective film 15, it is reflected by the semi-transparent and semi-reflective film 15, thereby forming a mirror surface state, which can be used as a makeup mirror.

The following uses the form of a table to describe the reflectivity, transmittance and shading rate of the sun visor when it is powered on and off:

Table 1

Among them, the shading rate of the sun visor = outer reflectance + absorbance, which represents the shading ability of the sun visor, the inner reflectance of the sun visor represents the effect as a vanity mirror in the car, and the transmittance represents the effect of not blocking the line of sight in the sunshade state .

In the embodiment of the utility model, a brand-new sun visor design is provided. The sun visor is an asymmetric optical design. When power is not applied, one side of the sun visor is transparent, and the other side is transparent. It can increase the shading rate with the change of light intensity, and it can also be used as a regular mirror.

Please refer to FIG. 5, the sun visor in the embodiment of the present invention may further include: a control board 17 connected to the transparent electrode layer 13 for inputting a driving voltage to the transparent electrode layer 13 to drive the liquid crystal layer The liquid crystal molecules in 14 are deflected. In the embodiment of the present invention, the sun visor has an independent control main board 17. In some other embodiments, the control main board may also be integrated in the control circuit of the vehicle.

Please refer to FIG. 5, the sun visor in the embodiment of the present invention may further include: a photosensitive sensor 18 connected to the control main board 17 for sensing the light intensity of the ambient light; wherein, the control main board 17 is in the photosensitive When the intensity of the ambient light sensed by the sensor 18 is greater than or equal to the first preset threshold, the driving voltage is input to the transparent electrode layer 13. Further optionally, the greater the intensity of the sensed ambient light, the higher the input driving voltage, so that the shading rate of the sun visor body is higher.

In the embodiment of the present invention, optionally, the sun visor further includes: a solar battery device connected to the control main board for supplying power to the control main board.

Further optionally, the solar cell device is multiplexed as a photosensitive sensor, and the intensity of the light is different, and the magnitude of the current converted by the solar cell device is different. The greater the intensity of the light, the greater the converted current, so as to perceive the intensity of the light. High or low, the control board 17 inputs the driving voltage to the transparent electrode layer 13 when the current converted by the solar cell device is greater than or equal to a second preset threshold. Further optionally, the larger the current converted by the solar cell device, the higher the input driving voltage, so that the shading rate of the sun visor body is higher.

The sun visor of the embodiment of the present invention may further include a connecting mechanism connected to one side of the sun visor body for connecting the sun visor body to the vehicle body. Please refer to Figures 1 and 6, the connecting mechanism includes: a bracket 2 connected to one side of the sun visor body 1; connect. Of course, the structure of the connection mechanism is not limited to this. In addition, optionally, the connecting mechanism may be a rotating mechanism to rotatably connect the sun visor body to the vehicle body, so that the sun visor can be stowed without using a shielding plate.

In the embodiment of the present invention, the photosensitive sensor 18 and the control main board 17 can be arranged on the connecting mechanism.

Please refer to FIG. 6, the sun visor of the embodiment of the present invention may further include: a transparent protective structure 4 arranged on at least two opposite sides of the sun visor body 1 for protecting the sun visor body.

Please refer to Figure 7, the embodiment of the present invention also provides a front windshield, including a shading area 71 and a non-shading area 72, the shading area 71 is provided with a sun visor 100, the structure of the sun visor 100 please refer to the figure 2. Including: a sun visor body, the sun visor body includes: a first transparent substrate 11 and a second transparent substrate 12 disposed oppositely, and a transparent electrode disposed between the first transparent substrate 11 and the second transparent substrate 12 The layer 13 and the liquid crystal layer 14, the transflective film 15 provided on the first transparent substrate 11, the polarizer 16 provided on the second transparent substrate 12, the transflective film 15 The passing axis is perpendicular to the light transmission axis of the polarizer 16.

In the embodiment of the utility model, the sun visor is embedded in the front baffle glass of the vehicle, and a separate sun visor is not needed, which saves space in the vehicle.

Optionally, the shading area of the front baffle glass can be hollowed out, and the sun visor 100 can be embedded. Or, the front baffle glass is two layers of glass, and it is a whole piece. In the shading area, the two layers of glass reuse the first transparent substrate and the second transparent substrate of the sun visor.

Optionally, the sun visor further includes: a control main board connected to the transparent electrode layer for inputting a driving voltage to the transparent electrode layer to drive the deflection of liquid crystal molecules in the liquid crystal layer. In order to reduce the impact on the line of sight, the control board can be arranged in the upper area of the sun visor body.

Optionally, the sun visor further includes: a photosensitive sensor connected to the control main board for sensing the light intensity of the ambient light; When it is equal to the first preset threshold, the driving voltage is input to the transparent electrode layer.

Optionally, the sun visor further includes: a solar battery device connected to the control main board for supplying power to the control main board.

The embodiment of the present invention also provides a vehicle, which includes the sun visor separately provided in the above-mentioned embodiment, or includes the front windshield including the sun visor in the above-mentioned embodiment.

The embodiments of the present utility model are described above with reference to the accompanying drawings, but the present utility model is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative, not restrictive, and are common in the art. Under the enlightenment of the utility model, the personnel can make many forms without departing from the scope of the utility model and the protection scope of the claims, all of which belong to the protection of the utility model.

Claims

A sun visor, characterized in that it comprises:

A sun visor body, the sun visor body includes: a first transparent substrate and a second transparent substrate disposed oppositely, a transparent electrode layer and a liquid crystal layer disposed between the first transparent substrate and the second transparent substrate are disposed in the The transflective film on the first transparent substrate is a polarizer provided on the second transparent substrate, and the transmission axis of the transflective film is perpendicular to the transmission axis of the polarizer.
The sun visor according to claim 1, further comprising:

The control board is connected to the transparent electrode layer and is used to input a driving voltage to the transparent electrode layer to drive the deflection of liquid crystal molecules in the liquid crystal layer.
The sun visor according to claim 2, further comprising:

The photosensitive sensor is connected to the control main board and is used to sense the intensity of the ambient light;

The control board inputs the driving voltage to the transparent electrode layer when the intensity of the ambient light sensed by the photosensitive sensor is greater than or equal to a first preset threshold.
The sun visor according to claim 2, further comprising:

The solar battery device is connected to the control main board and is used for supplying power to the control main board.
The sun visor according to claim 4, wherein:

The solar cell device is multiplexed as a photosensitive sensor;

The control board inputs the driving voltage to the transparent electrode layer when the current converted by the solar cell device is greater than or equal to a second preset threshold.
The sun visor according to claim 1, further comprising:

The connecting mechanism is connected to one side of the sun visor body and is used to connect the sun visor body to the vehicle body.
The sun visor according to claim 6, wherein the connecting mechanism comprises:

A bracket, connected to one side of the sun visor body;

Two pendants are respectively connected to the two ends of the bracket for connecting with the vehicle body.
The sun visor according to claim 1, further comprising:

The transparent protective structure is arranged on at least two opposite sides of the sun visor body.
A front windshield, characterized by comprising a shading area and a non-shielding area, and the shading area is provided with the sun visor according to any one of claims 1-5.
A vehicle, characterized by comprising the sun visor according to any one of claims 1-8, or comprising the front windshield according to claim 9.