Front windshield assembly, vehicle and method for automatic reduction of glare

Abstract

The application relates to the technical field of automobile parts, and discloses a front windshield assembly, a vehicle and an automatic high-light reduction method, which comprises a polarized glass configured as a front windshield of a cab; a position recognition device used for recognizing the position of a light source and the position of a driver's eye and recognizing the transmission area of light on the polarized glass; a light-sensing recognition device used for sensing the light intensity I0 of the outer surface, the light intensity I of the inner surface and the light intensity IX of the driver's eye position of the transmission area of the polarized glass; and a polarization assembly comprising a polaroid and a driving device, wherein the polaroid is arranged on the inner side of the polarized glass, and the driving device is used for driving the rotation angle R of the polaroid according to the received deflection signal, so that the difference is equal to the light intensity threshold A, so as to at least reduce the light intensity of the transmission area. The front windshield assembly has good high-light reduction effect, high fusion degree with the polarized glass, does not affect the driving experience, does not have devices or structures affecting the driving sight, and improves the driving safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile parts, in particular to a front windshield assembly, a vehicle and an automatic high light reduction method. BACKGROUND

[0002] With the rapid development of vehicles, vehicles have widely entered people's daily life, but the incidence of traffic accidents has also shown a high-speed trend. Among them, the accidents caused by dazzling are not in the minority. Dazzling refers to the discomfort of the observer caused by the light source shining on the observer's eyes, thereby weakening the observer's visual response to the object. The light source that causes the driver to be dazzled is generally a high light that penetrates the front windshield of the car into the driver's cabin at a specific angle, and the high light mainly comes from the high beam of the oncoming vehicle or other high-intensity reflections outside the vehicle.

[0003] In related technologies, the existing vehicle anti-dazzling devices are mostly glasses, light shields and the like. Although such devices have played a role in reducing high light to some extent, the high light reduction effect is poor, and the integration with the front windshield of the vehicle is poor, affecting the driving experience. In addition, the light shield also affects the driving line of sight, which also affects the driving safety of the vehicle. SUMMARY

[0004] The present application provides a front windshield assembly, a vehicle and an automatic high light reduction method to at least solve one of the above technical problems.

[0005] In a first aspect, the present application provides a front windshield assembly, comprising:

[0006] A polarized glass configured as a front windshield of a driver's cabin and only allows light with a polarization angle of a to pass through the polarized glass into the driver's cabin;

[0007] A position recognition device for recognizing the position of a light source and the position of a driver's eye and recognizing the transmission area of light from the position of the light source to the position of the driver's eye on the polarized glass;

[0008] A light sensing recognition device for sensing the light intensity I0 incident to the outer surface of the transmission area of the polarized glass, the light intensity I of the inner surface and the light intensity IX of the driver's eye position;

[0009] A controller for comparing the difference between the light intensity I and the light intensity IX with a pre-stored light intensity threshold A, and outputting a deflection signal to the polarization assembly if the difference is greater than the light intensity threshold A;

[0010] A polarization assembly, comprising a polarization sheet arranged on the inner side of the polarization glass, and a driving device for driving the polarization sheet to rotate an angle R according to the received deflection signal, so that the difference is equal to the light intensity threshold A, to at least reduce the light intensity of the transmission area.

[0011] In one embodiment, the position recognition device comprises:

[0012] A first camera arranged on the outer side of the polarization glass for recognizing the light source position;

[0013] A second camera arranged on the inner side of the polarization glass for recognizing the driver's eye position.

[0014] In a further embodiment, the position recognition device further comprises a processor for establishing a spatial coordinate system based on the positions of the first and second cameras and the plane of the polarization glass, and identifying the transmission area of the light from the light source position to the driver's eye position on the polarization glass in combination with the human eye visual width.

[0015] In one embodiment, the light sensing recognition device comprises an outer glass light sensing sensor arranged on the outer side of the polarization glass for sensing the light intensity I0 incident to the outer surface of the polarization glass.

[0016] In one embodiment, the light sensing recognition device comprises an inner glass light sensing sensor arranged on the inner side of the polarization glass for sensing the light intensity I incident to the inner surface of the polarization glass.

[0017] In one embodiment, the light sensing recognition device comprises an in-vehicle light sensing sensor arranged in the driver's cabin for sensing the light intensity IX at the driver's eye position.

[0018] In one embodiment, there are multiple polarization sheets, and the multiple polarization sheets are distributed in a tiled manner on the inner side of the polarization glass, and the area of the polarization glass corresponding to the driver's eye position is provided with at least one polarization sheet.

[0019] In one embodiment, the driving device is arranged in the driver's cabin and located at the edge of the inner side of the polarization glass.

[0020] In a second aspect, the present application further provides a vehicle comprising the front windshield assembly of any of the above embodiments.

[0021] In a third aspect, the present application further provides a method for automatically reducing high light of a front windshield assembly, comprising:

[0022] The position recognition device of the front windshield assembly is used to identify the light source position and the driver's eye position, and identify the transmission area of the light from the light source position to the driver's eye position on the polarized glass.

[0023] The light sensing recognition device is used to sense the light intensity I0 of the outer surface of the transmission area of the polarized glass, the light intensity I of the inner surface, and the light intensity IX of the driver's eye position.

[0024] The controller compares the difference between the light intensity I and the light intensity IX with the pre-stored light intensity threshold A, and if the difference is greater than the light intensity threshold A, a deflection signal is output to the polarization assembly, and the driving device of the polarization assembly drives the rotation angle R of the polarizing plate according to the received deflection signal until the difference is equal to the light intensity threshold A.

[0025] The technical scheme provided by the present application has the beneficial effects that the position recognition device identifies the transmission area of the light source on the polarized glass, the controller judges whether there is high light on the polarized glass according to the comparison result of the light intensity difference identified by the light sensing recognition device and the pre-set light intensity threshold, and if there is high light, the driving device drives the rotation angle R of the polarizing plate to at least reduce the light intensity of the transmission area, which has good high light reduction effect, and the polarization assembly is arranged on the inner side of the polarized glass, which has high fusion degree with the polarized glass and does not affect the driving experience, and there is no device or structure affecting the driving vision, which improves the driving safety. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 It is a structural schematic diagram of the front windshield assembly of the present application.

[0028] Figure 2 It is a flowchart of the automatic high light reduction method of the front windshield assembly of the present application.

[0029] In the figure: 10-polarized glass; 20-first camera; 30-second camera; 40-outer glass light sensor; 50-inner glass light sensor; 60-in-vehicle light sensor; 70-polarizing plate; 80-light source position; 90-driver's eye position. DETAILED DESCRIPTION

[0030] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0031] As shown in the front windshield assembly, comprising: polarized glass 10, position recognition device, light sensing recognition device, controller and polarization assembly. Figure 1

[0032] The polarized glass 10 is configured as a cab front windshield, and only allows light with a polarization angle of a to pass through the polarized glass 10 into the cab.

[0033] The position recognition device is used to identify the light source position 80 and the driver's eye position 90, and to identify the transmission area of the light from the light source position 80 to the driver's eye position 90 on the polarized glass 10.

[0034] The position recognition device comprises a first camera 20, a second camera 30 and a processor connected in phase electric signal.

[0035] The first camera 20 is arranged on the outside of the polarized glass 10 and is used to identify the light source position 80. It should be noted that the light source in the present embodiment is not limited to the car light, but can also be other light sources, such as street lamps.

[0036] The second camera 30 is arranged on the inside of the polarized glass 10 and is used to identify the driver's eye position 90.

[0037] ​The processor establishes a spatial coordinate system based on the positions of the first camera 20 and the second camera 30 and the plane in which the polarized glass 10 is located, and identifies the transmission area of light from the light source position 80 to the driver's eye position 90 on the polarized glass 10 in combination with the human eye visual width. Since the light source position 80 is not fixed, the transmission area of light from the light source position 80 to the driver's eye position 90 on the polarized glass 10 is also not fixed in fact. How to accurately obtain the transmission area is one of the problems to be solved by the embodiment, and the technical solution can obtain a more accurate transmission area compared with the prior art, thereby achieving a better high light reduction effect. In the prior art, a more common way is to directly set a polarized mirror on a part of the glass in front of the driver's cab, such as the Chinese patent with publication number CN111016593A. Although this type of structure can achieve a certain high light reduction effect, the transmission area of high light is not accurately known, and blind rotation of the polarized mirror cannot achieve a good high light reduction effect, but may affect the smooth transmission of light including signal lights through the polarized glass 10, affecting the driver's driving of the vehicle.

[0038] The light sensing device is used to sense the light intensity I0 of the outer surface of the transmission area of the polarized glass 10, the light intensity I of the inner surface, and the light intensity IX of the driver's eye position 90. The transmission area belongs to a region of the polarized glass 10.

[0039] Specifically, the light sensing device includes an outer glass light sensing sensor 40, an inner glass light sensing sensor 50, and an in-vehicle light sensing sensor 60.

[0040] The outer glass light sensing sensor 40 is arranged on the outer side of the polarized glass 10 and is used to sense the light intensity I0 of the outer surface of the polarized glass 10. That is, the outer glass light sensing sensor 40 can sense the light intensity I0 of any point on the outer surface of the polarized glass 10.

[0041] The inner glass light sensing sensor 50 is arranged on the inner side of the polarized glass 10 and is used to sense the light intensity I of the inner surface of the polarized glass 10. That is, the inner glass light sensing sensor 50 can sense the light intensity I of any point on the inner surface of the polarized glass 10.

[0042] The in-vehicle light sensing sensor 60 is arranged in the cab and is used to sense the light intensity IX of the driver's eye position 90. The in-vehicle light sensing sensor 60 is arranged in the cab and is located above the driver's head, and sensing the light intensity of the driver's head region can achieve light intensity sensing of the driver's eye position 90.

[0043] The controller is configured to compare the difference between the light intensity I of the transmission region and the light intensity IX with a pre-stored light intensity threshold A, and output a deflection signal to the deflection assembly if the difference is greater than the light intensity threshold A.

[0044] The outer glass light sensor 40, the inner glass light sensor 50, and the in-vehicle light sensor 60 are electrically connected to the controller. In addition, the controller is also electrically connected to the first camera 20, the second camera 30, and the processor.

[0045] The deflection assembly includes a polarizer 70 arranged on the inner side of the polarized glass 10 and a driving device configured to drive the polarizer 70 to rotate by an angle R according to the received deflection signal, so that the difference is equal to the light intensity threshold A, thereby reducing the light intensity of the transmission region.

[0046] In other words, when the difference between the light intensity I of the inner side of the polarized glass 10 of the transmission region and the light intensity IX of the driver's eye position 90 in the cab is greater than the light intensity threshold A, it is determined that the driver is subjected to high light interference, which affects the driving safety and requires reducing the light intensity of the transmission region. Therefore, the controller outputs a deflection signal to the driving device of the deflection assembly, and the driving device drives the polarizer 70 to rotate by an angle R, so that the difference between the light intensity I of the inner side of the polarized glass 10 and the light intensity IX of the driver's eye position 90 in the cab is equal to the light intensity threshold A, thereby reducing the light intensity of the transmission region and reducing the interference of high light on the driver.

[0047] When it is determined that the driver is subjected to high light interference, the driving device for driving the polarizer 70 in the transmission region to rotate is started until the difference between the light intensity I of the inner side of the polarized glass 10 and the light intensity IX of the driver's eye position 90 in the cab is equal to the light intensity threshold A, and the rotation angle R is as follows:

[0048] I = I0(cos(α-β-R)) 2 = IX + A

[0049] In the formula, I0 is the light intensity of the outer surface of the transmission region of the polarized glass 10, I is the light intensity of the inner surface of the transmission region of the polarized glass 10, α is the polarization angle of the polarized glass 10, β is the polarization angle of the polarizer 70, IX is the light intensity of the driver's eye position 90, and A is the light intensity threshold, which is a pre-set value.

[0050] Based on the above formula, the rotation angle R can be calculated, and the driving device drives the polarizer 70 to rotate according to the calculated rotation angle R.

[0051] As can be seen from the above formula, as the polarizer 70 rotates, (α-β) changes, thereby causing the light intensity I of the inner surface of the transmission region of the polarized glass 10 to periodically change, and the effect of eliminating high light can be achieved.

[0052] In some embodiments, the driving device is arranged in the cab, at the edge of the inner side of the polarized glass 10. The driving device for driving the polarizer 70 to rotate can be of prior art, and the present embodiment does not limit the specific structure of the driving device.

[0053] In some embodiments, there are multiple polarizers 70, which are distributed on the inner side of the polarized glass 10, and the area of the polarized glass 10 corresponding to the driver's eye position 90 is provided with at least one polarizer 70. Each polarizer 70 is circular and has an area smaller than that of the polarized glass 10. The polarization angle of the polarizer 70 is preset to β, i.e. only the light with a polarization angle of β can enter.

[0054] The specific process of identifying the transmission area by the position recognition device is as follows:

[0055] A fixed point O in the vehicle is taken as the origin to construct a spatial coordinate system XYZ.

[0056] The plane or curved surface on which the polarized glass 10 is arranged is constructed as a plane P in the coordinate system;

[0057] The second camera 30 arranged on the inner side (i.e. inside the vehicle) of the polarized glass 10 captures the position a of the driver's eye position 90 or the center point of the driver's eye relative to the second camera 30 and the plane e of the driver's eye at the position a, and converts the driver's eye position 90 into the position A and the plane E in the coordinate system XYZ according to the position of the second camera 30 relative to the coordinate system.

[0058] The first camera 20 arranged on the outer side (i.e. outside the vehicle) of the polarized glass 10 identifies the position b of the light source position 80 relative to the first camera 20, and converts the light source position 80 into the position B in the coordinate system XYZ according to the position of the first camera 20 relative to the coordinate system.

[0059] According to scientific experiments, the maximum angle of the human eye's visual width is usually 156°, which is known data. The processor (which can be regarded as a vehicle-mounted computer) simulates the 156° angle of the driver's eye position 90A on the plane E to approximately simulate the area S that can be seen by the human eye.

[0060] The straight line AB is formed by connecting the two points of the position B of the light source position 80 converted into the coordinate system XYZ and the driver's eye position 90A. If the included angle between the straight line AB and the plane E is ≥12°, it means that the light source is in the area S that can be seen by the human eye, and the area formed by the intersection point of the straight line AB and the plane P on which the polarized glass 10 is arranged is a point in the transmission area. The area formed by multiple such points is the transmission area.

[0061] It should be noted that the polarizer 70 described in this embodiment is also called a polarizer, or more specifically, a polarizing filter.

[0062] The basic structure of a polarizer includes: a central layer of PVA (polyvinyl alcohol), two layers of TAC (cellulose triacetate), a PSA film (pressure-sensitive adhesive), a release film, and a protective film. The PVA layer is responsible for polarization; however, PVA is highly susceptible to hydrolysis. To protect the physical properties of the polarizer, a TAC film with high light transmittance, good water resistance, and a certain mechanical strength is laminated to both sides of the PVA layer. This forms the polarizer substrate.

[0063] The driving device can be an existing electro-optic deflector or acousto-optic deflector. For example, the deflection device mentioned in publication number CN201811399936.0.

[0064] Based on the same inventive concept, the present invention also proposes a vehicle including the windshield assembly described in any of the above embodiments.

[0065] Based on the same inventive concept, the present invention also proposes a method for automatically reducing high beams in the aforementioned windshield assembly.

[0066] With attachment Figure 2 For example, the feedback-based closed-loop control strategy of this embodiment is as follows: the position recognition device identifies the transmission area, and the controller determines whether there is a highlight in the transmission area based on the preset light intensity threshold and the sensing data given by the light-sensing recognition device.

[0067] If so, a deflection signal is sent to the drive unit to drive the polarizer to rotate by an R angle of 70, so that the driver is not affected by the high beam.

[0068] If not, then the driver will not be affected by the high beams.

[0069] The specific steps of the method for automatically reducing high beam intensity of the windshield assembly in this embodiment include:

[0070] Using the position recognition device of the windshield assembly, the position of the light source 80 and the position of the driver's eye 90 are identified, and the transmission area of ​​the light from the position of the light source 80 to the position of the driver's eye 90 on the polarizing glass 10 is identified.

[0071] The light intensity I0, the light intensity I on the inner surface, and the light intensity IX at the driver's eye position 90 of the transmission area incident on the polarizing glass 10 are sensed using a light-sensing recognition device.

[0072] The controller compares the difference between the light intensity I and the light intensity IX with a pre-stored light intensity threshold A, and if the difference is greater than the light intensity threshold A, outputs a deflection signal including the rotation angle R to the polarization component. The driving device of the polarization component drives the polarizer 70 to rotate the angle R according to the received deflection signal until the difference is equal to the light intensity threshold A. In some embodiments, the driving device can drive the polarizer 70 to rotate other angles according to the deflection signal, so that the difference between the light intensity I and the light intensity IX is less than the light intensity threshold A.

[0073] It should be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more limitations, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0074] The foregoing is considered as illustrative only of the principles of the application. Numerous modifications and changes will readily occur to those skilled in the art, which modifications and changes are to be understood as intended to be embraced by the principles described herein and new matter incorporated in the above specification as defined by the scope of the appended claims. Therefore, it is not intended that the application be limited to the embodiments illustrated, but that the application can be practiced with modification and alteration within the scope and spirit of the following claims. Accordingly, the specification is to be regarded in an illustrative, rather than a restrictive, sense.

Claims

1. A front windshield assembly characterized by, The front windshield glass assembly comprises: Polarized glass configured as a front windshield of a cab and allowing only light having a polarization angle of to pass through the polarized glass into the cab; a position recognition device for recognizing a light source position and a driver's eye position, and recognizing a transmission area of light from the light source position to the driver's eye position on the polarized glass; a light sensing recognition device for sensing a light intensity I0 incident on an outer surface of the transmission area of the polarized glass, a light intensity I incident on an inner surface of the transmission area of the polarized glass, and a light intensity IX of the driver's eye position; a controller for comparing a difference between the light intensity I and the light intensity IX with a pre-stored light intensity threshold A, and outputting a deflection signal to a polarization component if the difference is greater than the light intensity threshold A; the polarization component comprises a polarization sheet arranged on an inner side of the polarized glass and a driving device for driving the polarization sheet to rotate by an angle R according to the received deflection signal, so that the difference is equal to the light intensity threshold A, so as to at least reduce the light intensity of the transmission area. The position recognition device comprises: a first camera arranged on an outer side of the polarized glass for recognizing the light source position; a second camera arranged on an inner side of the polarized glass for recognizing the driver's eye position.

2. The front windshield assembly of claim 1, wherein, The position recognition device further comprises a processor for establishing a spatial coordinate system based on positions of the first camera and the second camera and a plane on which the polarized glass is arranged, and recognizing the transmission area of light from the light source position to the driver's eye position on the polarized glass in combination with a human eye visual width.

3. The front windshield assembly of claim 1, wherein, The light sensing recognition device comprises:

4. The front windshield assembly of claim 1, wherein, an outer glass light sensing sensor arranged on the outer side of the polarized glass for sensing the light intensity I0 incident on the outer surface of the polarized glass.

5. The front windshield assembly of claim 1, wherein, The light sensing recognition device comprises:

6. The front windshield assembly of claim 1, wherein, an inner glass light sensing sensor arranged on the inner side of the polarized glass for sensing the light intensity I incident on the inner surface of the polarized glass.

7. The front windshield assembly of claim 1, wherein, The light sensing recognition device comprises:

8. A vehicle characterized by comprising: an in-vehicle light sensing sensor arranged in a driver's cabin for sensing the light intensity IX of the driver's eye position.

9. A method of automatically reducing the glare of a front windshield assembly as claimed in any one of claims 1-7, characterized in that, The polarization sheet has a plurality of polarization sheets which are distributed on the inner side of the polarized glass in a tiled manner, and at least one of the polarization sheets is arranged in a region of the polarized glass corresponding to the driver's eye position. The driving device is arranged in the driver's cabin and located at an edge of the inner side of the polarized glass. The front windshield glass assembly comprises: a position recognition device for recognizing a light source position and a driver's eye position, and recognizing a transmission area of light from the light source position to the driver's eye position on the polarized glass; a light sensing recognition device for sensing a light intensity I0 incident on an outer surface of the transmission area of the polarized glass, a light intensity I incident on an inner surface of the transmission area of the polarized glass, and a light intensity IX of the driver's eye position; a controller for comparing a difference between the light intensity I and the light intensity IX with a pre-stored light intensity threshold A, and outputting a deflection signal to a polarization component if the difference is greater than the light intensity threshold A; and a driving device of the polarization component for driving the polarization sheet to rotate by an angle R according to the received deflection signal, until the difference is equal to the light intensity threshold A.

Images