CN115989155A

CN115989155A - Light transmittance adjusting method and device

Info

Publication number: CN115989155A
Application number: CN202180047790.7A
Authority: CN
Inventors: 吴梓聪
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2023-04-18
Also published as: WO2023019395A1

Abstract

A light transmittance adjusting method and a light transmittance adjusting device can be used in the technical field of intelligent automobiles. The light transmittance adjusting method comprises the following steps: the method comprises the steps of obtaining the incident light intensity of N first areas included in the vehicle window glass at a first moment, wherein N is an integer larger than 1 (201), then determining the target light transmittance of each first area in the N first areas according to the incident light intensity at the first moment (202), and adjusting the light transmittance of the first areas to be the target light transmittance (203). By the method, the light transmittance of the window glass can be adjusted in different areas, so that the light transmittance on the window glass can form a gradual change effect, interference of strong light on a driver can be avoided, and influence on the driving safety of a vehicle is reduced.

Description

Light transmittance adjusting method and device

Technical Field

The application relates to the technical field of intelligent automobiles, in particular to a light transmittance adjusting method and device.

Background

When driving at night, the high beam of the opposite vehicle can cause great visual interference to the driver, even cause the driver to lose the vision momentarily, thereby generating serious potential safety hazard. The method of using a mechanical device to control a windshield or a shading plate or using a glass material to shade light quickly often shields the sight of a driver while shading light, so that the integrity of the driver acquiring road condition information is limited, and the correctness of driving decision is influenced.

Disclosure of Invention

The application provides a light transmittance adjusting method and device, which can avoid interference of strong light on a driver and reduce influence on vehicle driving safety.

In a first aspect, an embodiment of the present application provides a method for adjusting light transmittance, including: the light transmittance adjusting device obtains incident light intensity of N first regions included in the vehicle window glass at a first moment, wherein N is an integer greater than 1, determines target light transmittance of each first region in the N first regions according to the incident light intensity at the first moment, and adjusts the light transmittance of the first regions to the target light transmittance.

By the method, the light transmittance of the window glass can be adjusted in different areas, if the incident light intensities of any two first areas are different, the target light transmittances of the two first areas are different, so that the target light transmittances on the window glass can form a space gradual change effect, and under the condition of strong light irradiation (for example, a high beam is opened to a vehicle), the light transmittance can be adaptively adjusted according to the incident light intensity, so that the influence of strong light on a driver is effectively reduced, and the driving safety is improved.

In a possible implementation manner, the N first regions include a second region and a third region, the incident light intensity of the second region at the first time is greater than the incident light intensity of the third region at the first time, and the target light transmittance of the second region is less than the target light transmittance of the third region. It is to be understood that the second region includes one or more first regions, the third region includes one or more first regions, and the number of first regions included in the second region and the third region is less than or equal to N. Thus, the region where the incident light intensity is larger, for example, the second region, has a lower target transmittance; the smaller the incident light intensity is, for example, the larger the target transmittance of the region, for example, the third region, is, so that the transmittances of any plurality of first regions with different incident light intensities are different, so that the transmittance on the vehicle window glass can form a spatial gradient effect.

In one possible implementation, determining a target transmittance of each of the N first regions according to an incident light intensity at a first time includes: the light transmittance adjusting device determines a target light transmittance of the first area according to the incident light intensity of the first area at the first moment and a first adjusting coefficient, wherein the first adjusting coefficient is used for indicating a mapping relation between the incident light intensity and the light transmittance. Thus, the adaptability adjustment of the light transmittance of each area of the vehicle window glass can be realized.

In a possible implementation manner, the method further includes: the light transmittance adjusting device acquires a plurality of frames of face images of a driver, the plurality of frames of face images correspond to a first moment, and the eye closing degree and/or the eye closing speed of the driver are/is determined according to the plurality of frames of face images; the first adjustment factor is determined as a function of the degree of eye closure and/or the speed of eye closure. In the implementation manner, the eye closing degree and/or the eye closing speed can indicate whether the driver is interfered by strong light, so that the target light transmittance corresponding to each incident light intensity (also referred to as light intensity for short) can be adjusted by the first adjustment coefficient according to whether the driver is interfered by obvious strong light, for example, when the eye closing degree and/or the eye closing speed is large, the driver is indicated to be interfered by obvious strong light, the target light transmittance corresponding to each light intensity can be adjusted by the first adjustment coefficient to be reduced, the interference of the strong light on the driver is reduced, and the safety is improved; for another example, when the eye closing degree and/or the eye closing speed are/is small, it indicates that the driver is less disturbed by strong light, and the target light transmittance corresponding to each light intensity can be adjusted to be increased through the first adjustment coefficient, so that the driver can clearly see the road condition ahead, and the safety is improved.

In one possible implementation, determining the first adjustment factor according to the eye closing degree and/or the eye closing speed includes: and determining a preset value of the first adjusting coefficient according to the eye closing degree and/or the eye closing speed and a first corresponding relation, wherein the first corresponding relation comprises the corresponding relation between the eye closing degree and/or the eye closing speed and the preset first adjusting coefficient. Therefore, the first adjustment coefficient can be adaptively adjusted, and the safety and the comfort of vehicle driving are improved.

In one possible implementation, adjusting the light transmittance of the first region to a target light transmittance may include: and adjusting the light transmittance of the first area to the target light transmittance through the target time length according to the target light transmittance of the first area and a second adjustment coefficient, wherein the second adjustment coefficient is used for indicating the mapping relation between the light transmittance of the first area and time. Therefore, for each first area, the light transmittance of the vehicle window glass can be adjusted in a time gradual change mode, the time for the eyes of a driver to adapt to the change of the light transmittance is given, and the safety and the comfort of the eyes are improved.

In a possible implementation manner, the method further includes: the light transmittance adjusting device acquires a plurality of frames of face images of the driver, the plurality of frames of face images correspond to the first moment, the eye closing degree and/or the eye closing speed of the driver are determined according to the plurality of frames of face images, and the second adjusting coefficient is determined according to the eye closing degree and/or the eye closing speed. In the implementation manner, the eye closing degree and/or the eye closing speed can indicate whether the driver is interfered by strong light, so that the light transmittance change speed can be adjusted by the second adjustment coefficient according to whether the driver is obviously interfered by the strong light, for example, when the eye closing degree and/or the eye closing speed are higher, the driver is indicated to be obviously interfered by the strong light, the light transmittance change can be adjusted by the second adjustment coefficient more rapidly, the interference of the strong light on the driver is rapidly reduced, and the safety is improved; for another example, when the eye closing degree and/or the eye closing speed are/is smaller, it indicates that the driver is less interfered by strong light, and the light transmittance can be adjusted to change more slowly by the second adjustment coefficient, so that the comfort of the eyes of the driver is improved.

In one possible implementation manner, determining the second adjustment coefficient according to the eye closing degree and/or the eye closing speed includes: and determining a preset value of a second adjusting coefficient according to the eye closing degree and/or the eye closing speed and a second corresponding relation, wherein the second corresponding relation comprises the corresponding relation between the eye closing degree and/or the eye closing speed and the preset second adjusting coefficient. Therefore, the second adjustment coefficient can be adaptively adjusted, and the safety and the comfort of vehicle driving are improved.

In a second aspect, an embodiment of the present application further provides a light transmittance adjusting apparatus, which includes an obtaining unit, and an adjusting unit. The acquisition unit is used for acquiring the incident light intensity of N first areas included in the vehicle window glass at a first moment, wherein N is an integer greater than 1; the processing unit is used for determining the target light transmittance of each of the N first areas according to the incident light intensity at the first moment; and an adjusting unit for adjusting the light transmittance of the first region to a target light transmittance.

In one possible implementation manner, the N first regions include a second region and a third region; the incident light intensity of the second area at the first moment is greater than that of the third area at the first moment, and the target light transmittance of the second area is less than that of the third area. It is to be understood that the second region includes one or more first regions, the third region includes one or more first regions, and the number of first regions included in the second region and the third region is less than or equal to N.

In a possible implementation manner, the processing unit is specifically configured to: and determining the target light transmittance of the first area according to the incident light intensity of the first area at the first moment and a first adjusting coefficient, wherein the first adjusting coefficient is used for indicating the mapping relation between the incident light intensity and the light transmittance.

In a possible implementation manner, the obtaining unit is further configured to: acquiring a plurality of frames of face images of a driver, wherein the plurality of frames of face images correspond to a first moment; a processing unit for processing the received data, and is also used for: determining the eye closing degree and/or the eye closing speed of the driver according to the plurality of frames of face images; a first adjustment factor is determined based on the degree of eye closure and/or the speed of eye closure.

In a possible implementation manner, the processing unit is specifically configured to: and determining a preset value of a first adjusting coefficient according to the eye closing degree and/or the eye closing speed and a first corresponding relation, wherein the first corresponding relation comprises the corresponding relation between the eye closing degree and/or the eye closing speed and the preset first adjusting coefficient.

In a possible implementation manner, the adjusting unit is specifically configured to: and adjusting the light transmittance of the first area to the target light transmittance through the target time length according to the target light transmittance of the first area and the second adjustment coefficient.

In a possible implementation manner, the obtaining unit is further configured to: acquiring a plurality of frames of face images of a driver, wherein the plurality of frames of face images correspond to a first moment; a processing unit, specifically configured to: determining the eye closing degree and/or the eye closing speed of the driver according to the plurality of frames of face images; and determining a second adjusting coefficient according to the eye closing degree and/or the eye closing speed, wherein the second adjusting coefficient is used for indicating the mapping relation between the light transmittance of the first area and the time.

In a possible implementation manner, the processing unit is specifically configured to: and determining a preset value of a second adjusting coefficient according to the eye closing degree and/or the eye closing speed and a second corresponding relation, wherein the second corresponding relation comprises the corresponding relation between the eye closing degree and/or the eye closing speed and the preset second adjusting coefficient.

It should be understood that, for technical effects of any possible implementation manners of the second aspect and the second aspect, reference may be made to technical effects of any possible implementation manners of the first aspect and the first aspect, and details are not described here.

In a third aspect, an embodiment of the present application further provides an electronic device, where the electronic device includes a processor and a memory, where the memory is used to store computer-executable instructions, and when the electronic device runs, the processor executes the computer-executable instructions in the memory to perform, by using hardware resources in the electronic device, the operation steps of the method according to the first aspect and any one of the possible designs of the first aspect.

In a fourth aspect, an embodiment of the present application further provides a vehicle, including the light transmittance adjusting apparatus described in any one of the foregoing second aspect and possible implementations of the second aspect, or the electronic apparatus in the foregoing third aspect.

In a fifth aspect, an embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium includes computer instructions, and when the computer instructions are run on an on-board device, the on-board device is caused to execute technical solutions in the first aspect of the present application and any possible implementation manner of the first aspect.

In a sixth aspect, an embodiment of the present application further provides a computer program product, which includes an instruction, and when the computer program product runs on a vehicle-mounted device, the vehicle-mounted device executes the technical solution of the first aspect and any one of the possible designs of the first aspect of the embodiment of the present application.

In a seventh aspect, an embodiment of the present application further provides a chip system, where the chip system may include a processor. The processor is coupled to the memory and is operable to perform the first aspect and the method of any one of the possible implementations of the first aspect. Optionally, the chip system further comprises a memory. A memory for storing a computer program (also referred to as code, or instructions). A processor configured to call and run the computer program from the memory, so that the device on which the system-on-chip is installed performs the method of the first aspect and any one of the possible implementations of the first aspect.

In a specific implementation process, the light transmittance adjusting device may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit that functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the present application does not limit the specific implementation manner of the processor and various circuits.

In an eighth aspect, an embodiment of the present application further provides a light transmittance adjusting system, which includes a vehicle window glass, and the light transmittance adjusting apparatus described in any one of the foregoing possible implementations of the second aspect and the second aspect, or the electronic apparatus in the foregoing third aspect.

Drawings

FIG. 1 is a system block diagram of a system for adjusting a transmittance of a windshield according to an embodiment of the present disclosure;

fig. 2 is a schematic flow chart illustrating a method for adjusting light transmittance according to an embodiment of the present disclosure;

FIG. 3 is a graph illustrating a target transmittance as a function of incident light intensity according to an embodiment of the present disclosure;

FIG. 4 is a graph illustrating transmittance as a function of time according to an embodiment of the present disclosure;

fig. 5 is a schematic view of a scene where a high beam is irradiated onto a windshield according to an embodiment of the present disclosure;

fig. 6 is a schematic view of a light transmittance adjusting apparatus according to an embodiment of the present disclosure;

fig. 7 is a schematic view of an electronic device according to an embodiment of the present application.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings. It should be apparent that the embodiments described are some, but not all embodiments of the present application. The specific methods of operation in the method embodiments may also be applied in the apparatus embodiments. In the description of the embodiments of the present application, a person having ordinary skill in the art can understand that: the various numbers of the first, second, etc. mentioned in this application are merely for convenience of description and are not intended to limit the scope of the embodiments of this application or to indicate the order of the steps. "plurality" means two or more. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one" means one or more. At least two means two or more. "at least one," "any," or similar expressions refer to any combination of these items, including any combination of item(s) or item(s).

In the embodiment of the application, the vehicle can communicate with other objects based on vehicle to outside wireless communication technology (V2X). For example, communication between the vehicle and the viewer-side terminal device may be realized based on vehicle to vehicle (V2V) wireless communication technology. The communication between the vehicle and other objects may be based on wireless fidelity (Wi-Fi), fifth generation (5 th generation,5 g) mobile communication technology, long Term Evolution (LTE), and the like.

The vehicle is at the night in-process of traveling, from the opposite direction travel other vehicles the high beam shine the front window glass of vehicle on, the light of high beam sees through window glass can shine navigating mate's eyes to influence navigating mate and observe the place ahead road conditions, danger takes place easily. In addition, in some scenes, when a vehicle enters an environment with high illuminance, for example, a direct sunlight road, the observation of driving environment information by a driver may be affected, and a safety hazard may be caused.

In order to solve the problem that drivers are often interfered by far-reaching lights in front during driving at night, mechanical devices can be used for controlling the shading methods such as window glasses or shading plates, however, the methods can shade the sight of the drivers while shading, and the capability of adaptively adjusting the intensity of the projected light is lacked, so that the drivers cannot acquire complete road condition information when the sight is shaded, correct decisions are difficult to make, and the safety of vehicle driving is influenced.

In order to solve the above problem, embodiments of the present application provide a light transmittance adjusting method, which may be performed by a light transmittance adjusting device, where the light transmittance adjusting device may be disposed at any position of a vehicle, for example, may be integrated in a window glass of the vehicle, or may be integrated in an on-board device (for example, integrated in a car machine, a vehicle controller, or a domain controller), or may be disposed in a cabin as a separately disposed controller, or may be integrated with other control devices in the cabin. The light transmittance adjusting device can acquire the incident light intensity of N first areas included in a window glass on a vehicle, and for each first area: according to the incident light intensity of the first area, the target light transmittance of the first area is determined, and the light transmittance of the first area is adjusted to be the target light transmittance, so that the light transmittance of the window glass can be adjusted in different areas, the light transmittance of any plurality of first areas with different incident light intensities is different, a space gradual change effect can be formed on the light transmittance of the window glass, and the driving requirement of a user on an intelligent highlight interference scene can be met. The strong light interference scene is, for example, a high beam interference scene, and is, for example, a strong light sunshine scene, which is not limited in the embodiment of the present application.

In the embodiment of the present application, the window glass may be any one or more of a front windshield, a rear windshield, a side window, and a sunroof (or referred to as a sunroof) glass, and the type of the window glass is not limited in the embodiment of the present application. The vehicle window glass may be made of glass, or may be a composite material using glass as a base material, or may be other materials having a certain transmittance and strength and capable of achieving the function of the vehicle window glass, such as a polymer material.

Taking a strong light source as a high beam and a window glass as a front windshield as an example, a system block diagram of the light transmittance adjusting system of the windshield suitable for the application is provided below.

As shown in fig. 1, the light transmittance adjustment system of the windshield includes an electronic windshield and a light transmittance adjustment device.

The electronic windshield is provided with at least one light sensing device and a light dimming component, the light sensing device can collect light intensity signals irradiated on the electronic windshield, the light sensing device can be a photosensitive sensor, for example, in the embodiment of the application, the electronic windshield is divided into N areas, N is an integer larger than 1, each area can be provided with one photosensitive sensor, so that the incident light intensity of each area can be obtained, taking N as 10 as an example, the electronic windshield is divided into 10 areas with the same area, 10 photosensitive sensors can be arranged on the electronic windshield, in order to save cost, less than N photosensitive sensors can also be arranged, the photosensitive sensors are arranged in every two areas, for example, in the continuous area 1, the area 2 and the area 3, the photosensitive sensors are respectively arranged in the area 1 and the area 3, the incident light intensity collected by the photosensitive sensor arranged in the area 1 and the incident light intensity collected by the photosensitive sensor arranged in the area 3, and the average value is the incident light intensity of the area 2. More photosensitive sensors may be provided if a more accurate intensity of the incident light on the electronic windshield is desired.

The light adjusting component is used for adjusting the light transmittance of the electronic windshield, the electronic windshield can be made of materials with variable electro-light transmittance, and therefore the light adjusting component can adjust the light transmittance by changing the current output to the materials with the variable electro-light transmittance.

The light transmittance adjusting device can be arranged in the electronic windshield and also can be arranged outside the electronic windshield, and the light transmittance adjusting device can comprise a light intensity input interface and a light transmittance output interface and can receive incident light intensity from the light sensor through the light intensity input interface. The light transmittance adjusting device generates target light transmittance on each area (or position) of the electronic windshield through a space gradual change scheme according to incident light intensity of each area, then generates light transmittance on each area (or position) corresponding to time through a time gradual change scheme, then outputs expected light transmittance values on corresponding positions corresponding to time to the controller through a light transmittance output interface, the controller calculates to obtain the size of current required to be output, then outputs the current to the electro-generated light transmittance variable material through a light adjusting assembly, and completes light transmittance gradual change adjustment of the electronic windshield according to the size of the current.

Optionally, the light transmittance adjustment system may further include a camera device, and the light transmittance adjustment device may further include a picture input interface, and the face image collected by the camera device may be received through the picture input interface. The camera device can acquire the face image in real time, and the light transmittance adjusting device can intelligently identify the eye closing degree and the eye closing speed through the eye characteristic data in the face image and then adjust the parameters in the spatial gradient scheme and the temporal gradient scheme in real time. Illustratively, the camera device may be a camera disposed within the cabin (e.g., near an a-pillar, center console, rear view mirror, or steering column), which may be an infra-red (IR), color (RGB) or other type of camera capable of acquiring facial/eye images.

Based on the above, a light transmittance adjusting method provided in the embodiments of the present application is described below, which can be performed by a light transmittance adjusting apparatus or a component (e.g., a chip, a circuit, etc.) of the light transmittance adjusting apparatus. As shown in fig. 2, the method includes:

step 201, a light transmittance adjusting device obtains incident light intensities of N first areas included in a windshield at a first time, where N is an integer greater than 1.

In the embodiment of the present application, the windshield is divided into N first areas for example, and it should be understood that the N first areas in step 201 may be replaced by N positions, and then the following light transmittance adjustment scheme for the first areas may be applied to light transmittance adjustment for each position.

In step 202, the light transmittance adjusting device determines a target light transmittance of each of the N first regions according to the incident light intensity at the first time.

In any two of the N first areas, taking any two first areas as an example and respectively called as a second area and a third area, the incident light intensity of the second area at the first moment is greater than the incident light intensity of the third area at the first moment, and the target transmittance of the second area is less than the target transmittance of the third area.

Based on the above embodiments, in step 202, there are various possible implementations of determining the target transmittance of the first area according to the incident light intensity at the first time.

In a possible embodiment a1, the target transmittance of the first area is determined according to the intensity of the incident light at the first time and a first adjustment coefficient, where the first adjustment coefficient is used to indicate a mapping relationship between the intensity of the incident light and the transmittance.

In one possible implementation, the target transmittance of the first region has a certain functional relationship with the incident light intensity, and the target transmittance of the first region decreases as the incident light intensity increases, for example, as shown in the following formula (1):

y(x)＝kx (1)

in equation (1): k is a first adjusting coefficient, y is the target light transmittance of the first area, and x is the incident light intensity of the first area at a first moment.

For example, the following formula (2):

in equation (2): k is a first adjustment coefficient, y is the target transmittance of the first area, and x is the incident light intensity of the first area at the first time.

In another possible implementation manner, the first adjustment coefficient includes a first parameter for controlling a length of the first incident light intensity range and a second parameter for controlling an initial light intensity position corresponding to the first incident light intensity range, where the first incident light intensity range may be a range from an incident light intensity corresponding to a first preset light transmittance to an incident light intensity corresponding to a second preset light transmittance, the second preset light transmittance is greater than the first preset light transmittance, for example, the first preset light transmittance is 3%, the second preset light transmittance is 97%, and the first preset light transmittance and the second preset light transmittance may be set according to actual needs, where specific values are not limited.

The above-mentioned determining the target transmittance of the first area according to the incident light intensity at the first time and the first adjustment coefficient may be implemented by: and determining the target light transmittance of the first area according to the incident light intensity of the first area at a first moment, a first parameter for controlling the length of the first incident light intensity range and a second parameter for controlling the initial light intensity position corresponding to the first incident light intensity range. For example, the first incident light intensity range is x11 to x12, the length of the first incident light intensity range is the difference between x12 and x11, and the initial light intensity position corresponding to the first incident light intensity range is x11.

In one example, the target transmittance of the first region may be determined based on a Sigmoid function. For example, the target transmittance of the first region may be determined using the following equation (3):

in formula (3), y is a target transmittance of the first region, x is an incident light intensity of the first region at a first time, a is the first parameter, and b is the second parameter.

In a possible implementation manner, the first parameter and the second parameter may be default values, and the default values may be light transmittance acceptable to eyes under a scene simulating high beam irradiation according to different incident light intensities and light transmittance corresponding to the incident light intensities, and a and b are calculated by combining the above formula (3) and are respectively used as default values of the first parameter and the second parameter.

In another possible implementation manner, the first parameter and the second parameter may also be values adjusted according to actual needs. For example, the first parameter and the second parameter may be adjusted according to the degree of interference of the driver by the high beam, and the degree of interference may be represented by the degree of eye closure and/or the eye closure speed, which will be described in detail below.

The light transmittance adjusting device may store a first corresponding relationship, where the first corresponding relationship includes a corresponding relationship between the eye closing degree and/or the eye closing speed and a preset value of the first parameter and a preset value of the second parameter, that is, the first corresponding relationship may be a corresponding relationship between the eye closing degree and a preset value of the first parameter and a preset value of the second parameter, may also be a corresponding relationship between the eye closing speed and a preset value of the first parameter and a preset value of the second parameter, and may also be a corresponding relationship between the eye closing degree and the eye closing speed and a preset value of the first parameter and a preset value of the second parameter. The eye closing degree may be represented by a degree of reduction of the eyes when the eyes are interfered by the high beam and when the eyes are not interfered by the high beam, for example, based on a maximum distance m0 between an upper eyelid and a lower eyelid on a perpendicular bisector of a line connecting two canthus when the eyes are normally opened, and a distance between the upper eyelid and the lower eyelid on the perpendicular bisector of the line connecting two canthus when the eyes are closed at the first time and interfered by the high beam is m1, and the eye closing degree may be represented by a ratio (for example, in percentage) between m1 and m0, for example, the eye closing degree is 100% to represent complete closing, and for example, the eye closing degree is 0% to represent complete opening and is not interfered by the high beam, and a larger eye closing degree may indicate that the driver is interfered by the high beam. The eye closing speed can be expressed by how much the distance between the upper eyelid and the lower eyelid on the perpendicular bisector of the two canthi lines decreases per second, and can be expressed by percentage, for example, closing the eyes 10% per second, and for example, closing the eyes 30% per second, where a larger value indicates a faster eye closing speed, and a faster eye closing speed indicates a greater degree of interference of the driver with the high beam. It should be understood that the first corresponding relationship may also be stored in a storage device inside the vehicle, the light transmittance adjusting apparatus may obtain the first corresponding relationship from the storage device, and the storage location of the first corresponding relationship is not limited in the embodiment of the present application.

In a possible embodiment a2, the light transmittance adjusting device may further obtain a plurality of frames of face images of the driver, where the plurality of frames of face images correspond to the first time, determine the degree of eye closure and/or the eye closure speed of the driver according to the plurality of frames of face images, and then determine the first adjustment coefficient according to the degree of eye closure and/or the eye closure speed. The face image may include the eyes of the driver, may be a partial face image (for example, including only the eyes), or may include other parts of the human body in addition to the eyes of the driver. It is understood that the multi-frame image corresponding to the first time point means that the time at which the multi-frame image is acquired (e.g., captured) may include the first time point and at least one time point before the first time point.

Based on the possible implementation manner, the light transmittance adjusting device may determine the preset value of the first adjusting coefficient according to the eye closing degree and/or the eye closing speed and the first corresponding relationship, and then determine the target light transmittance of the first area according to the incident light intensity at the first time and the preset value of the first adjusting coefficient. Wherein the first corresponding relation comprises a corresponding relation between the eye closing degree and/or the eye closing speed and a preset first adjusting coefficient.

When the first adjustment coefficient includes a first parameter for controlling the length of the first incident light intensity range and a second parameter for controlling the initial light intensity position corresponding to the first incident light intensity range, the first corresponding relationship may include a corresponding relationship between the eye closing degree and/or the eye closing speed and a preset value of the first parameter and a preset value of the second parameter, and the light transmittance adjustment device may determine the first preset value of the first parameter and the second preset value of the second parameter corresponding to the eye closing degree and/or the eye closing speed according to the eye closing degree and/or the eye closing speed and the first corresponding relationship. Thus, the adjustment values of the first parameter and the second parameter can be determined. At the next moment of the first moment, the light transmittance adjusting device may obtain multiple frames of face images of the driver at the next moment and at least one moment before the next moment, determine the eye closing degree and/or the eye closing speed of the driver according to the multiple frames of face images, then determine a first preset value of a first parameter and a second preset value of a second parameter corresponding to the eye closing degree and/or the eye closing speed according to the first corresponding relationship, and determine the first preset value of the first parameter and the second preset value of the second parameter at the next moment, which are adjustment values of the first parameter and the second parameter corresponding to the next moment, relative to the first preset value of the first parameter and the second preset value of the second parameter determined at the first moment.

Further, the light transmittance adjusting device determines the target light transmittance of the first area according to the incident light intensity of the first area at the first moment, the first preset value of the first parameter and the second preset value of the second parameter.

Taking the first time as t2 and the time immediately before the first time as t1 as an example, the parameters for adjusting the spatial gradient scheme of the transmittance are described with reference to specific examples.

As shown in fig. 3, a curve 1 is a functional relationship curve of the target transmittance and the incident light intensity corresponding to the time t1, and satisfies the formula (3), where a first parameter a corresponding to the curve 1 is a1, and a second parameter b is b1, and according to characteristics of the curve 1, a gradient region can be divided into a low risk region, a medium risk region, and a high risk region, which correspond to different transmittance variation values, respectively, and can be adjusted correspondingly according to different risks. For example, the boundary of the low risk zone and the medium risk zone is x11 for 97% transmittance and the boundary of the medium risk zone and the high risk zone is x12 for 3% transmittance. Wherein, the incident light intensity range corresponding to the low risk zone is 0-x 11, the incident light intensity range corresponding to the medium risk zone is x 11-x 12, which is the first incident light intensity range, and the incident light intensity range corresponding to the high risk zone is greater than x12.

The first parameter a and the second parameter b are adjustable parameters, wherein the first parameter a is used for controlling the length of a first incident light intensity range corresponding to the middle risk area, namely the length from x11 to x12, and the second parameter b is used for controlling the initial light intensity position corresponding to the first incident light intensity range corresponding to the middle risk area, namely the position of x11.

When a large eye closure degree and/or a fast eye closure degree are detected at t2, it means that the driver has been subjected to significant strong light interference, that is, the situation is very urgent, and at this time, the first parameter a should be increased and the second parameter b should be decreased appropriately, so that the light transmittance corresponding to the incident light intensity at any position on the curve 1 is decreased, as shown in the curve 2 in fig. 3. Curve 2 shifts to the left the low risk zone compared to curve 1, i.e., the low risk zone is less tolerant of risk, while the middle risk zone has a faster rate of light transmittance decrease, and enters the high risk zone more quickly, tending to be safer. If a smaller and/or slower eye closure is detected at time t3, the first parameter a can be reduced and the second parameter b can be increased, for example, by switching from curve 2 to curve 1, in which case the bright light has little effect on the eyes, is more tolerant to risk, and the medium risk zone falls more slowly and enters the high risk zone more slowly.

In step 203, the light transmittance adjusting device adjusts the light transmittance of the first region to a target light transmittance.

Based on the above embodiments, there are many possible implementations in the step 203, and the following description is made in detail by the following possible implementation b1 and possible implementation b 2.

In a possible embodiment b1, a current value corresponding to the target transmittance is calculated, and then a current corresponding to the current value is output to the variable electro-transmittance material, so as to directly adjust the transmittance of the first region from a first transmittance to the target transmittance, where the first transmittance is a first initial transmittance of the first region.

Possible embodiment b2 is to adjust the transmittance of the first area to the target transmittance by a time-gradient method, that is, the transmittance of the first area is adjusted to the target transmittance through at least one intermediate transmittance from the first transmittance.

In a manner b21, which can realize the step 203, the transmittance adjusting device adjusts the transmittance of the first area to the target transmittance through the target time period according to the target transmittance of the first area and the second adjustment coefficient. Wherein the second adjustment coefficient is used for indicating the mapping relation between the light transmittance of the first area and time.

In a manner b22 that may implement step 203, the light transmittance adjusting device may further obtain multiple frames of face images of the driver, where the multiple frames of face images correspond to the first time, determine the eye closing degree and/or the eye closing speed of the driver according to the multiple frames of face images, and determine the second adjusting coefficient according to the eye closing degree and/or the eye closing speed. And then, according to the first light transmittance of the first area at the first moment, the target light transmittance and the preset value of the second adjusting coefficient, adjusting the light transmittance of the first area from the first light transmittance to the target light transmittance through the target time length.

When the second adjustment coefficient includes a third parameter for controlling the length of the first time range corresponding to the transmittance adjustment stage and a fourth parameter for controlling the start time position of the first time range, the above-mentioned mode b21 can be implemented by: and adjusting the light transmittance of the first region from the first light transmittance to the target light transmittance through the target time period according to the first light transmittance of the first region at the first moment, the target light transmittance, a third parameter for controlling the length of the first time range corresponding to the light transmittance adjustment stage and a fourth parameter for controlling the initial time position of the first time range.

The light transmittance of the first area has a certain functional relation with time, and the light transmittance of the first area is reduced along with the increase of the time until the target light transmittance is adjusted. In one possible implementation, the following formula (4) is used to determine the second transmittance of the first area at the second time, the second time is any one time after the first time and within the target time period, and then the transmittance of the first area is adjusted to the second transmittance at the second time, and the transmittance of the first area is the target transmittance when the target time period passes.

In formula (4), y is a second transmittance of the first region at a second time, t is the second time, c is a third parameter, d is a fourth parameter, and G is a target transmittance.

In a possible implementation manner, the third parameter and the fourth parameter may be default values, and the default values may be times required for decreasing the transmittance from 100% to G according to the transmittance change rate acceptable by the eye in a scene simulating high beam irradiation, and c and d are calculated by combining the above formula (4) as the default values of the third parameter and the fourth parameter, respectively.

In another possible implementation manner, the third parameter and the fourth parameter may also be values adjusted according to actual needs. For example, the third parameter and the fourth parameter may be adjusted according to the degree of interference of the driver by the high beam, and the degree of interference may be represented by the degree of eye closure and/or the eye closure speed, which will be described in detail below.

The light transmittance adjusting device may store a second corresponding relationship, where the second corresponding relationship includes a corresponding relationship between the eye closing degree and/or the eye closing speed and a preset value of the third parameter and a preset value of the fourth parameter, that is, the second corresponding relationship may be a corresponding relationship between the eye closing degree and a preset value of the third parameter and a preset value of the fourth parameter, may also be a corresponding relationship between the eye closing speed and a preset value of the third parameter and a preset value of the fourth parameter, and may also be a corresponding relationship between the eye closing degree and the eye closing speed and a preset value of the third parameter and a preset value of the fourth parameter. The related contents of the eye closing degree and the eye closing speed can be referred to the above related contents, and are not described herein again. It should be understood that the second corresponding relationship may also be stored in a storage device inside the vehicle, and the light transmittance adjusting apparatus may obtain the second corresponding relationship from the storage device, and the storage location of the second corresponding relationship is not limited in the embodiment of the present application.

In a manner that may implement step 203, the light transmittance adjusting device obtains multiple frames of face images of the driver at the first time and at least one time before the first time, determines the eye closing degree and/or the eye closing speed of the driver according to the multiple frames of face images, and then determines a third preset value of a third parameter and a fourth preset value of a fourth parameter corresponding to the eye closing degree and/or the eye closing speed according to the second corresponding relationship. Thus, the adjustment values of the third parameter and the fourth parameter can be determined.

Further, the light transmittance adjusting device adjusts the light transmittance of the first area from the first light transmittance to the target light transmittance through a target time period according to the first light transmittance of the first area at the first time, the target light transmittance, the third preset value of the third parameter, and the fourth preset value of the fourth parameter.

Taking the first time as t2 and the previous time of the first time as t1 as an example, the parameters for adjusting the light transmittance time gradient scheme are described with reference to specific examples.

As shown in fig. 4, the curve 3 is a functional relationship curve of the transmittance and the time corresponding to the time t1, and satisfies the above formula (4), the third parameter c corresponding to the curve 3 is c1, and the fourth parameter d is d1, and according to the characteristics of the curve 3, the gradual change interval can be divided into an adaptation stage, a change stage and a stabilization stage, which correspond to different transmittance change speeds, respectively, and more conform to the rule of observing light change by eyes.

For example, the boundary between the adaptation stage and the variation stage is time t2 corresponding to the transmittance variation rate k1, and the boundary between the variation stage and the stabilization stage is time t4 corresponding to the transmittance variation rate k 2. The time range corresponding to the adaptation stage is 0-t 2, the time range corresponding to the variation stage is t 2-t 4, which is the first time range, and the time range corresponding to the stabilization stage is t4.

The third parameter c and the fourth parameter d are adjustable parameters, wherein the third parameter c is used to control the length of the first time range corresponding to the light transmittance adjustment stage (i.e., the variation stage in fig. 4), i.e., the length from t2 to t4, and d is used to control the starting time position of the first time range, i.e., the position of t 2.

In fig. 4, G is the target transmittance for a certain area on the windshield, given by the spatial gradient scheme, which is constant in the temporal gradient scheme. When a greater and/or faster eye closure is detected, this means that the driver has been subjected to significant glare, i.e. when the situation is critical, c should be increased and d should be decreased appropriately, so that the light transmission changes more rapidly, as shown in curve 4 of fig. 4.

Compared with the curve 3, the curve 4 has the advantages that the change stage is shifted to the left, the change stage is faster entered from the adaptation stage, the reduction speed of the light transmittance in the change stage is faster, and the stable stage can be faster entered, so that the driving safety is ensured. If the eye closure degree is detected to be small and/or the eye closure degree is slow at the next moment, the third parameter c can be appropriately reduced and the fourth parameter d can be increased, for example, the curve 4 is switched to the curve 3, in this case, the situation is not urgent, the adaptive stage enters the change stage more slowly, the light transmittance in the change stage is reduced more slowly, and the stable stage is entered more slowly, so that the driving comfort is ensured.

By the method, the degree of strong light interference on the current driver is judged by detecting the eye closing degree and/or the eye closing speed, and parameters in the space and time gradual change scheme are intelligently adjusted in real time according to the degree of strong light interference on the current driver, so that safety and comfort are ensured.

Based on the above, the embodiment of the application provides a scene simulating a high beam coming from an oncoming vehicle and irradiating the windshield, and through the effect after the transmittance adjustment scheme, as shown in the left diagram in fig. 5, a scene with a small eye closure degree, that is, a low emergency degree, is identified through eye characteristic data acquired by a camera device, and the right diagram is a scene with a large eye closure degree, that is, a very emergency situation, and needs to be quickly shaded, is identified through eye characteristic data acquired by the camera device.

In the two scenes shown in fig. 5, in space, the light transmittance adjusting device can intelligently adjust the light transmittance according to the incident light intensity without 'cutting', so that the important positions on the windshield are low in light transmittance, the non-important positions are high in light transmittance, the two deepest black positions in fig. 5 correspond to the irradiation centers of the two opposite high beams, and the light transmittance gradient effect is formed towards the periphery by taking the irradiation center as the center, namely, the light transmittance gradually changes from the high risk area to the low risk area. The change in transmittance over time is gradual over time, meaning that the time of change is programmed and not simply subject to adjustment by the controller. The left image and the right image correspond to an adaptation stage, a change stage and a stabilization stage from top to bottom respectively, so that the law of observing changed objects by eyes is better met, and a driver can accurately make driving judgment while keeping out of the sun.

In the left and right images shown in fig. 5, the light transmittance of the left image changes slowly, which ensures that the eye can adapt to the light change in a more comfortable state. The light transmittance of the corresponding position of the right-side-view windshield is also low, the change of the light transmittance is rapid, the driving safety is guaranteed, the eye information can be acquired in real time in the process of intelligently adjusting the light transmittance, and different complex night driving scenes can be responded.

The possible embodiment a1 or the possible embodiment a2 can realize a spatial gradient adjustment scheme of the light transmittance of the windshield, and the possible embodiment b2 can realize a temporal gradient adjustment scheme of the light transmittance of the windshield. In the embodiment of the application, the spatial gradient adjustment scheme and the temporal gradient adjustment scheme of the light transmittance of the windshield can be used in combination or independently. For example, when the spatial gradation adjustment scheme is used alone, the light transmittance of the windshield may be adjusted using the above possible embodiment a1 or possible embodiment a2, and possible embodiment b 1. For another example, when the time-gradient adjustment scheme is used alone, the transmittance of the windshield may be integrally adjusted by using the possible embodiment b2, that is, the transmittance of all the regions of the windshield is uniform.

Based on the above embodiments and the same concept, fig. 6 is a schematic diagram of a light transmittance adjusting apparatus provided in an embodiment of the present application, and as shown in fig. 6, the light transmittance adjusting apparatus 600 can implement the steps performed by the light transmittance adjusting apparatus in the above method embodiments. The light transmittance adjustment apparatus may include an acquisition unit 601, a processing unit 602, and an adjustment unit 603.

An obtaining unit 601, configured to obtain incident light intensities of N first regions included in a window glass at a first time, where N is an integer greater than 1;

a processing unit 602, configured to determine a target transmittance of each of the N first regions according to the incident light intensity at the first time;

an adjusting unit 603 configured to adjust the light transmittance of the first region to a target light transmittance.

In one possible implementation manner, the N first regions include a second region and a third region, the incident light intensity of the second region at the first time is greater than the incident light intensity of the third region at the first time, and the target transmittance of the second region is smaller than the target transmittance of the third region.

In a possible implementation manner, the processing unit 602 is specifically configured to: and determining the target light transmittance of the first area according to the incident light intensity of the first area at the first moment and a first adjusting coefficient, wherein the first adjusting coefficient is used for indicating the mapping relation between the incident light intensity and the light transmittance.

In a possible implementation manner, the obtaining unit 601 is further configured to: acquiring a plurality of frames of face images of a driver, wherein the plurality of frames of face images correspond to a first moment; a processing unit 602, further configured to: determining the eye closing degree and/or the eye closing speed of the driver according to the plurality of frames of face images; the first adjustment factor is determined as a function of the degree of eye closure and/or the speed of eye closure.

In a possible implementation manner, the processing unit 602 is specifically configured to: and determining a preset value of the first adjusting coefficient according to the eye closing degree and/or the eye closing speed and a first corresponding relation, wherein the first corresponding relation comprises the corresponding relation between the eye closing degree and/or the eye closing speed and the preset first adjusting coefficient.

In a possible implementation manner, the adjusting unit 603 is specifically configured to: and adjusting the light transmittance of the first area to the target light transmittance through the target time length according to the target light transmittance of the first area and the second adjustment coefficient.

In a possible implementation manner, the obtaining unit 601 is further configured to: acquiring a plurality of frames of face images of a driver, wherein the plurality of frames of face images correspond to a first moment; the processing unit 602 is specifically configured to: determining the eye closing degree and/or the eye closing speed of the driver according to the plurality of frames of face images; and determining a second adjusting coefficient according to the eye closing degree and/or the eye closing speed, wherein the second adjusting coefficient is used for indicating the mapping relation between the light transmittance of the first area and the time.

In a possible implementation manner, the processing unit 602 is specifically configured to: and determining a preset value of a second adjusting coefficient according to the eye closing degree and/or the eye closing speed and a second corresponding relation, wherein the second corresponding relation comprises the corresponding relation between the eye closing degree and/or the eye closing speed and the preset second adjusting coefficient.

For the concepts, explanations, details and other steps related to the technical solutions provided in the embodiments of the present application related to the light transmittance adjusting apparatus, reference is made to the foregoing methods or descriptions related to these contents in other embodiments, which are not described herein again.

According to the method provided by the embodiment of the application, the application also provides a light transmittance adjusting system, which comprises the vehicle window glass and the light transmittance adjusting device in any one of the embodiments.

According to the method provided by the embodiment of the application, the application also provides a vehicle, and the vehicle comprises the light transmittance adjusting device in any embodiment.

According to the foregoing method, fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure, and as shown in fig. 7, the electronic device 700 may include a memory 701, a processor 702, and may further include a bus system, where the processor 702 and the memory 701 may be connected through the bus system.

It should be understood that the processor 702 may be a chip. For example, the processor 702 may be a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Microcontroller (MCU), a Programmable Logic Device (PLD), or other integrated chips.

In implementation, the steps of the above method may be performed by instructions in the form of hardware integrated logic circuits or software in the processor 702. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor, or in a combination of the hardware and software modules in the processor 702. The software modules may be located in storage media such as ram, flash, rom, prom, or eprom, registers, etc. The storage medium is located in the memory 701, and the processor 702 reads the information in the memory 701, and completes the steps of the method in combination with the hardware thereof.

According to the method provided by the embodiment of the present application, the present application further provides a computer program product, which includes: computer program code or instructions which, when run on a computer, causes the computer to perform the method of any one of the above method embodiments.

According to the method provided by the embodiment of the present application, the present application further provides a computer-readable storage medium storing program code, which when run on a computer, causes the computer to execute the method of any one of the above-mentioned method embodiments.

According to the method provided by the embodiment of the application, the application also provides a chip system, and the chip system can comprise a processor. The processor is coupled to the memory and is operable to perform the method of any of the above method embodiments. Optionally, the chip system further comprises a memory. A memory for storing a computer program (also referred to as code, or instructions). And the processor is used for calling and running the computer program from the memory so that the device provided with the chip system executes the method of any one of the method embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The processes or functions according to the embodiments of the present application are generated in whole or in part when the computer instructions are loaded and executed on a computer. It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is only a logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method for adjusting light transmittance, comprising:

acquiring incident light intensity of N first regions included in the vehicle window glass at a first moment, wherein N is an integer greater than 1;

determining the target light transmittance of each of the N first areas according to the incident light intensity at the first moment;

adjusting the light transmittance of the first region to the target light transmittance.
The method of claim 1, wherein the N first regions comprise a second region and a third region;

the incident light intensity of the second area at the first moment is greater than that of the third area at the first moment, and the target light transmittance of the second area is less than that of the third area.
The method of claim 1 or 2, wherein said determining a target transmittance for each of the N first regions based on the incident light intensity at the first time comprises:

and determining the target light transmittance of the first area according to the incident light intensity at the first moment and a first adjusting coefficient, wherein the first adjusting coefficient is used for indicating the mapping relation between the incident light intensity and the light transmittance.
The method of claim 3, wherein the method further comprises:

acquiring a plurality of frames of face images of a driver, wherein the plurality of frames of face images correspond to a first moment;

determining the degree and/or speed of eye closure of the driver according to the plurality of frames of face images;

and determining the first adjusting coefficient according to the eye closing degree and/or the eye closing speed.
The method of claim 4, wherein determining the first adjustment factor based on the degree of eye closure and/or the speed of eye closure comprises:

and determining a preset value of the first adjusting coefficient according to the eye closing degree and/or the eye closing speed and a first corresponding relation, wherein the first corresponding relation comprises the corresponding relation between the eye closing degree and/or the eye closing speed and the preset first adjusting coefficient.
The method of any one of claims 1-5, wherein the adjusting the light transmittance of the first region to the target light transmittance comprises:

and adjusting the light transmittance of the first area to the target light transmittance through a target time length according to the target light transmittance of the first area and a second adjustment coefficient, wherein the second adjustment coefficient is used for indicating a mapping relation between the light transmittance of the first area and time.
The method of claim 6, wherein the method further comprises:

acquiring a plurality of frames of face images of a driver, wherein the plurality of frames of face images correspond to a first moment;

determining the degree and/or speed of eye closure of the driver according to the plurality of frames of face images;

and determining the second adjusting coefficient according to the eye closing degree and/or the eye closing speed.
The method of claim 7, wherein determining the second adjustment factor based on the degree of eye closure and/or the speed of eye closure comprises:

and determining a preset value of the second adjusting coefficient according to the eye closing degree and/or the eye closing speed and a second corresponding relation, wherein the second corresponding relation comprises the corresponding relation between the eye closing degree and/or the eye closing speed and the preset second adjusting coefficient.
A light transmittance adjustment device, comprising:

the acquiring unit is used for acquiring the incident light intensity of N first areas included by the vehicle window glass at a first moment, wherein N is an integer larger than 1;

the processing unit is used for determining the target light transmittance of each of the N first areas according to the incident light intensity at the first moment;

and the adjusting unit is used for adjusting the light transmittance of the first area to the target light transmittance.
The apparatus of claim 9, wherein the N first regions comprise a second region and a third region;

the incident light intensity of the second area at the first moment is greater than that of the third area at the first moment, and the target light transmittance of the second area is less than that of the third area.
The apparatus according to claim 9 or 10, wherein the processing unit is specifically configured to:

and determining the target light transmittance of the first area according to the incident light intensity of the first area at a first moment and a first adjusting coefficient, wherein the first adjusting coefficient is used for indicating the mapping relation between the incident light intensity and the light transmittance.
The apparatus as claimed in claim 11, wherein said obtaining unit is further configured to:

acquiring a plurality of frames of face images of a driver, wherein the plurality of frames of face images correspond to a first moment;

the processing unit is further configured to:

determining the degree and/or speed of eye closure of the driver according to the plurality of frames of face images; and determining the first adjusting coefficient according to the eye closing degree and/or the eye closing speed.
The apparatus as claimed in claim 12, wherein said processing unit is specifically configured to:

and determining a preset value of the first adjusting coefficient according to the eye closing degree and/or the eye closing speed and a first corresponding relation, wherein the first corresponding relation comprises the corresponding relation between the eye closing degree and/or the eye closing speed and the preset first adjusting coefficient.
The apparatus according to any of claims 9 to 13, wherein the adjustment unit is specifically configured to:

and adjusting the light transmittance of the first area to the target light transmittance through a target time length according to the target light transmittance of the first area and a second adjustment coefficient.
The apparatus of claim 14, wherein the obtaining unit is further configured to:

acquiring a plurality of frames of face images of a driver, wherein the plurality of frames of face images correspond to a first moment;

the processing unit is specifically configured to:

determining the degree and/or speed of eye closure of the driver according to the plurality of frames of face images;

and determining the second adjusting coefficient according to the eye closing degree and/or the eye closing speed, wherein the second adjusting coefficient is used for indicating the mapping relation between the light transmittance of the first area and the time.
The apparatus as claimed in claim 15, wherein said processing unit is specifically configured to:

and determining a preset value of the second adjusting coefficient according to the eye closing degree and/or the eye closing speed and a second corresponding relation, wherein the second corresponding relation comprises the corresponding relation between the eye closing degree and/or the eye closing speed and the preset second adjusting coefficient.
An electronic device, comprising: a memory for storing instructions and a processor for executing the instructions stored by the memory, the instructions stored in the memory when executed implementing the method of any one of claims 1 to 8.
A computer-readable storage medium comprising computer-readable instructions which, when read and executed by the computer, implement the method of any one of claims 1 to 8.
A computer program product comprising computer readable instructions which, when executed, implement the method of any of claims 1 to 8.
A chip comprising a processor coupled to a memory for executing a computer program or instructions stored in the memory, which when executed, implements the method of any of claims 1 to 8.
A light transmittance adjustment system comprising a vehicle window glass, and a light transmittance adjustment device according to any one of claims 9 to 16 or an electronic device according to claim 17.
A vehicle characterized by comprising the light transmittance adjustment apparatus according to any one of claims 9 to 16 or the electronic apparatus according to claim 17.