Intelligent anti-dazzle system and method for vehicle

Abstract

The invention discloses an intelligent anti-dazzle system and method for a vehicle, and belongs to the technical field of automobile anti-dazzle, and the system comprises a face detection device, inner glass, outer glass, a high beam detection device and a control system. A photosensitive diode array embedded in external glass detects data such as incident light intensity, direction and spectral characteristics in real time, a distance light detection device judges whether luminous flux is larger than a first preset value and the incident light direction according to the data, a face detection device is started if forward strong light exists, a face image is collected through an infrared camera, and a positioning module positions the eye position; and then the luminous flux needing to be reduced is calculated according to the luminous flux, the change position of the inner glass is determined by combining with the human eye position, then the coating / liquid crystal arrangement of the inner glass is controlled and changed, intelligent adjustment of the light transmittance is achieved, high beam glare is effectively dealt with, and driving safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive anti-glare technology, and more specifically, to a vehicle intelligent anti-glare system and method. Background Art

[0002] In the technical field of vehicle driving safety, the problem of driver's line of sight interference caused by the high beam illumination of oncoming vehicles has long existed. Existing anti-glare solutions mainly rely on the automatic anti-glare function of the rearview mirror and the sun visor in the vehicle: the former only acts on the rear view range of the vehicle and cannot solve the problem of forward high beam interference; the latter needs to be adjusted manually and the blocked vision area is limited, which is likely to cause a blind spot for the driver to observe. Both are difficult to meet the active anti-glare requirements under complex road conditions.

[0003] With the development of intelligent driving technology, there is an urgent need for a dynamic anti-glare solution for the vehicle front window glass. The core technical difficulties are as follows: First, it is necessary to achieve rapid perception and response of the front window glass to light signals to ensure millisecond-level regulation accuracy when the light intensity changes suddenly; second, accurately identify the range of the driver's face area and establish a dynamic anti-glare area division model based on facial features; third, through intelligent coating or liquid crystal layer dynamic regulation technology, achieve adaptive adjustment of the light transmittance in the front window area corresponding to the face, effectively attenuate the energy of the high beam glare, and ensure the driver's clear observation of the road environment.

[0004] Therefore, how to provide a vehicle intelligent anti-glare system and method that integrates light perception, face tracking and dynamic anti-glare of the front window glass is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a vehicle intelligent anti-glare system and method, which can automatically change the arrangement order of the coating / liquid crystal of the inner glass according to the face position when the oncoming vehicle turns on the high beam, so as to prevent the high beam of the oncoming vehicle from seriously affecting the line of sight of the driver of this vehicle and causing traffic accidents.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] On the one hand, the present invention provides a vehicle intelligent anti-glare system, including: a face detection device, an inner glass, an outer glass, a high beam detection device, and a control system;

[0008] A photosensitive diode array is embedded in the outer glass for detecting light signals in real time and converting them into photocurrents;

[0009] The photosensitive diode array is connected to the high beam detection device for analyzing and processing the photocurrent, obtaining incident light data, and determining whether to start face position detection based on the incident light data;

[0010] The face detection device is connected to the high beam detection device, and is used to turn on face detection according to the detection result of the high beam detection device, and obtain the face position;

[0011] The high beam detection device is further used to determine the adjustment position of the inner glass according to the eye position, and determine the adjustment parameter of the inner glass according to the incident light data;

[0012] The control system is used to generate a control instruction according to the adjustment position and the adjustment parameter;

[0013] The inner glass is used to adjust the light transmittance according to the control instruction.

[0014] Preferably, the face detection device includes: an infrared camera and a positioning module; the infrared camera is used to collect face images; the positioning module is used to locate the eye position of the driver according to the collected face images.

[0015] Preferably, the incident light data includes: incident light intensity, incident light direction, spectral characteristics.

[0016] Preferably, the high beam detection device is configured as:

[0017] Determine the luminous flux according to the incident light intensity;

[0018] Judge whether the luminous flux is greater than a first preset value. If not, do not perform the next step; if so, judge the incident light direction. If the incident light direction is forward, send a signal to start the face detection device. If the incident light direction is backward, do not perform the next step.

[0019] Preferably, the high beam detection device is further configured as:

[0020] Calculate the luminous flux that needs to be reduced according to the luminous flux;

[0021] Determine the adjustment parameter of the inner glass according to the luminous flux that needs to be reduced;

[0022] Determine the adjustment position of the inner glass according to the eye position and the law of refraction of light.

[0023] On the other hand, the present invention provides a vehicle intelligent anti-glare method, including the following steps:

[0024] When light shines on the outer glass, the photosensitive diode array arranged inside the outer glass detects the incident light intensity, incident light direction, and spectral characteristics of the incident light;

[0025] Determine the luminous flux according to the incident light intensity;

[0026] Determine whether the luminous flux is greater than a first preset value. If not, do not perform the next step; if so, then determine the incident light direction. If the incident light direction is forward, send a signal to activate the infrared camera to collect a face image, and locate the eye position of the driver based on the collected face image. If the incident light direction is backward, do not perform the next step;

[0027] Determine the adjustment position of the inner glass according to the eye position, and determine the adjustment parameter of the inner glass according to the incident light data;

[0028] Control and change the arrangement of the coating / liquid crystal of the inner glass according to the adjustment position and the adjustment parameter.

[0029] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a vehicle intelligent anti-glare system and method, which divides the front window glass into two parts: external light sensing (detected by a photodiode) and internal transformation (dynamic adjustment of the coating / liquid crystal layer), simplifies the system structure, and reduces the complexity of the overall transformation of the glass. By directly detecting the far light intensity and direction through a photodiode, complex image sensors or vehicle position detection modules are not required, reducing the hardware cost. Further, by detecting the face range (instead of only the light source position), and dynamically adjusting the coating or liquid crystal layer in combination with the face position, non-necessary areas are avoided from being blocked, improving the integrity of the driver's field of view. Furthermore, the present invention adjusts the refraction angle or light transmittance according to the far light intensity to achieve dynamic adaptation, rather than fixed threshold control. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0031] Figure 1 It is a schematic structural diagram provided by the present invention.

[0032] Figure 2 It is a schematic flow diagram provided by the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] An embodiment of the present invention discloses a vehicle intelligent anti-glare system provided by the present invention, as follows Figure 1 shown, including: a face detection device 1, an inner glass 2, an outer glass 3, a high beam detection device (not shown in the figure), and a control system (not shown in the figure);

[0035] A photosensitive diode array is embedded in the outer glass for real-time detection of optical signals and conversion into photocurrent;

[0036] The photosensitive diode array is connected to the high beam detection device for analyzing and processing the photocurrent to obtain incident light data and determining whether to start face position detection based on the incident light data;

[0037] The high beam detection device is also used to determine the adjustment position of the inner glass according to the eye position and determine the adjustment parameters of the inner glass according to the incident light data;

[0038] The control system is used to generate control instructions based on the adjustment position and adjustment parameters;

[0039] The inner glass adjusts the light transmittance according to the adjustment position and adjustment parameters. The inner glass uses PDLC (polymer dispersed liquid crystal) or electrochromic coating. The coating refracts or absorbs the high beam wavelength (such as blue and white light), and the liquid crystal layer controls the light transmittance through the change of molecular arrangement. The inner glass scatters light when there is no voltage and becomes transparent after applying voltage.

[0040] The working principle of the anti-glare system mentioned in the embodiment of the present invention is as follows: When light shines on the outer glass, the device for sensing high beams will detect the light flux and direction in sequence. If both meet the conditions of high beams, after the face detection device 1 detects the approximate range of the face, the arrangement order of the liquid crystal layer at the corresponding position on the inner glass 2 will change, controlling the amount of light passing through and reducing the impact of light on the driver. The liquid crystal layer will have different changes when sensing different high beams. When the external light no longer meets the conditions of high beams, then the liquid crystal layer will no longer change and will not affect the normal driving of the driver.

[0041] Further, the face detection device includes: an infrared camera and a positioning module; the infrared camera is used to collect face images; the positioning module is used to locate the eye position of the driver according to the collected face images.

[0042] Specifically, the incident light data includes: incident light intensity, incident light direction, and spectral characteristics. Among them, the spectral data is used to improve the movement path of the inner glass coating / liquid crystal arrangement, and recording the spectral characteristics is used for product iteration and expanding the database.

[0043] Even further, the high beam detection device is configured to:

[0044] Determine the light flux according to the incident light intensity;

[0045] Determine whether the luminous flux is greater than a first preset value. If not, do not perform the next step; if so, determine the incident light direction. If the incident light direction is forward, send a signal to activate the face detection device. If the incident light direction is backward, do not perform the next step.

[0046] Specifically, the coating refractive index or liquid crystal light transmittance is adjusted in grades according to the detected high beam intensity (such as low, medium, high):

[0047] Low intensity: The light transmittance is reduced by 30%;

[0048] High intensity: The light transmittance is reduced by 70% and the scattering angle is increased.

[0049] Direction compensation: Combine the detection direction of the photosensitive diode to calculate the incident angle of the high beam, and dynamically adjust the refraction direction of the coating / liquid crystal layer to ensure that the light deviates from the driver's line of sight.

[0050] In another embodiment, the high beam detection device is further configured to:

[0051] Determine the adjustment parameters for the inner glass according to the luminous flux to be reduced;

[0052] Determine the adjustment position of the inner glass according to the human eye position and the law of refraction of light.

[0053] On the other hand, the present invention provides a vehicle intelligent anti-glare method, as Figure 2 shown, including the following steps:

[0054] When light irradiates on the outer glass, the photosensitive diode array arranged inside the outer glass detects the incident light intensity, incident light direction, and spectral characteristics of the incident light;

[0055] Determine the luminous flux according to the incident light intensity;

[0056] Determine whether the luminous flux is greater than a first preset value. If not, do not perform the next step; if so, determine the incident light direction. If the incident light direction is forward, send a signal to activate the infrared camera to collect a face image, and locate the eye position of the driver according to the collected face image. If the incident light direction is backward, do not perform the next step;

[0057] Determine the adjustment position of the inner glass according to the eye position, and determine the adjustment parameters of the inner glass according to the incident light data;

[0058] Control and change the arrangement of the coating / liquid crystal of the inner glass according to the adjustment position and adjustment parameters.

[0059] In the present specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the apparatuses disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0060] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent anti-glare system for vehicles, characterized in that, Comprising: A face detection device, an inner glass, an outer glass, a high beam detection device, and a control system; A photosensitive diode array is embedded in the outer glass for detecting an optical signal in real time and converting it into a photocurrent; The photosensitive diode array is connected to the high beam detection device for analyzing and processing the photocurrent to obtain incident light data and determining whether to start face position detection based on the incident light data; The face detection device is connected to the high beam detection device for starting face detection according to the detection result of the high beam detection device and obtaining the face position; The high beam detection device is further configured to determine the adjustment position of the inner glass according to the eye position and determine the adjustment parameter of the inner glass according to the incident light data; The control system is configured to generate a control instruction according to the adjustment position and the adjustment parameter; The inner glass is configured to adjust the light transmittance according to the control instruction.

2. The intelligent anti-glare system for a vehicle according to claim 1, characterized in that, The face detection device includes: an infrared camera and a positioning module; the infrared camera is configured to collect a face image; the positioning module is configured to locate the eye position of the driver according to the collected face image.

3. The vehicle intelligent anti-glare system according to claim 1, characterized in that, The incident light data includes: incident light intensity, incident light direction, and spectral characteristics.

4. The vehicle intelligent anti-glare system according to claim 2, wherein The high beam detection device is configured as: Determining the luminous flux according to the incident light intensity; Judging whether the luminous flux is greater than a first preset value. If not, no further step is executed; if so, judging the incident light direction. If the incident light direction is forward, a signal is sent to start the face detection device. If the incident light direction is backward, no further step is executed.

5. The vehicle intelligent anti-glare system according to claim 4, characterized in that, The high beam detection device is further configured as: Calculating the luminous flux that needs to be reduced according to the luminous flux; Determining the adjustment parameter of the inner glass according to the luminous flux that needs to be reduced; Determining the adjustment position of the inner glass according to the eye position and the law of refraction of light.

6. A vehicle intelligent anti-glare method, characterized in that, Including the following steps: When light irradiates on the outer glass, the photosensitive diode array arranged in the outer glass detects the incident light intensity, incident light direction, and spectral characteristics of the incident light; Determining the luminous flux according to the incident light intensity; Judging whether the luminous flux is greater than a first preset value. If not, no further step is executed; if so, judging the incident light direction. If the incident light direction is forward, a signal is sent to start the infrared camera to collect a face image, and the eye position of the driver is located according to the collected face image. If the incident light direction is backward, no further step is executed; Determining the adjustment position of the inner glass according to the eye position and determining the adjustment parameter of the inner glass according to the incident light data; Controlling and changing the arrangement of the coating / liquid crystal of the inner glass according to the adjustment position and the adjustment parameter.

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