Windshield control method, system, device and automobile

Abstract

The application belongs to the technical field of display, and proposes a windshield control method, system, device and automobile. The camera unit is used to acquire the outside environment information and the driver behavior information in real time. According to the outside environment information and the driver behavior information, the liquid crystal molecules in the two layers of liquid crystal films in the specified area on the inner side of the windshield are controlled to deflect in the specified direction, until the liquid crystal molecules in the two layers of liquid crystal films form a specified angle. The application controls the angle between the liquid crystal molecules in the two layers of liquid crystal films in the specified area on the inner side of the windshield, controls the light transmittance of the windshield according to the specific scene characteristics, protects the eyes of the driver, provides a clear field of view, and ensures the driving safety. Moreover, the liquid crystal control area of the application can achieve pixel-level control, accurately controls each liquid crystal pixel, accurately controls the position where the light transmittance needs to be changed, and does not need to change the whole windshield synchronously, so the control precision is high.

Description

Technical Field

[0001] This application belongs to the field of display technology, specifically relating to a windshield control method, system, device, and automobile. Background Technology

[0002] During vehicle operation, specific external lighting conditions can affect a driver's vision, potentially increasing the risk of driving accidents. For example, in strong sunlight, the driver's eyes are easily fatigued and uncomfortable due to the sunlight stimulation; at night, the direct beams of oncoming vehicles can make it impossible for the driver to open their eyes; and glare from rainy weather can also disrupt the driver's vision.

[0003] In existing technologies, there are designs that adjust the brightness of the entire windshield to meet different external lighting conditions. However, this approach has drawbacks, such as affecting the driver's observation of the external environment and lacking sufficient control precision. Summary of the Invention

[0004] To address the aforementioned technical problems, this application proposes a windshield control method, system, device, and automobile.

[0005] Specifically, this application proposes a windshield control method, the method comprising:

[0006] The camera unit acquires real-time information about the external environment and driver behavior.

[0007] Based on the external environment information and driver behavior information, the liquid crystal molecules in the two layers of liquid crystal films in the designated area inside the windshield are controlled to deflect in a designated direction until the liquid crystal molecules in the two layers of liquid crystal films form a designated angle.

[0008] This technology controls the angle between liquid crystal molecules in two layers of liquid crystal film in a designated area on the inside of the windshield, thereby controlling the light transmittance of the windshield according to specific scene characteristics, protecting the driver's eyes, providing the driver with a clear field of vision, and ensuring driving safety. Moreover, the liquid crystal control area proposed in this application achieves precise control down to each liquid crystal pixel, precisely controlling the position where the light transmittance needs to be changed, without requiring the entire windshield to change synchronously.

[0009] Furthermore, the step of controlling the liquid crystal molecules in the two layers of liquid crystal films in a designated area inside the windshield to deflect in a designated direction based on the external environment information and driver behavior information, until the liquid crystal molecules in the two layers of liquid crystal films form a designated angle, includes:

[0010] By combining the external environment information and the driver behavior information, the current lighting scene is obtained;

[0011] The lighting scene is matched with multiple preset lighting scene types to obtain the lighting scene type to which the current lighting scene belongs;

[0012] The positional relationship of liquid crystal molecules in the two layers of liquid crystal film is controlled according to the type of lighting scene to which the current lighting scene belongs.

[0013] By matching and identifying the current lighting scene type, and then controlling the positional relationship of the liquid crystal molecules accordingly, the windshield's light transmission mode can be quickly changed based on environmental information and driver status, providing the driver with a clear view and ensuring driving safety.

[0014] Furthermore, the preset lighting scene types include a first lighting scene type, a second lighting scene type, and a third lighting scene type; controlling the positional relationship of liquid crystal molecules in the two liquid crystal films according to the lighting scene type to which the current lighting scene belongs includes:

[0015] When the current lighting scene belongs to the first lighting scene type, the liquid crystal molecules in the two layers of liquid crystal film are controlled to be parallel to each other.

[0016] When the current lighting scene belongs to the second lighting scene type, the region to be controlled in the two layers of liquid crystal film is determined, and the liquid crystal molecules in the region to be controlled are controlled to form an angle of a specified non-zero angle.

[0017] When the current lighting scene belongs to the third lighting scene type, the liquid crystal molecules in the two layers of liquid crystal film are parallel to each other and each forms a specified non-zero angle with the horizontal road surface.

[0018] By controlling the liquid crystal molecules to form different angles according to different lighting conditions, the light transmittance of the windshield can be flexibly changed according to the ambient light level and driver status information. At the same time, it can flexibly adjust the light transmittance of specific areas on the windshield, that is, the position corresponding to the driver's line of sight, with high control precision.

[0019] Furthermore, the first lighting scene type includes scenes where the overall ambient brightness is lower than a preset value;

[0020] The second lighting scene type includes scenes where light shines into the vehicle from a light source outside the vehicle;

[0021] The third lighting scene type includes scenes that produce a specified degree of glare in the driver's field of vision.

[0022] Preset lighting scene types were designed for several special lighting scenarios. These types are representative and frequently occur during actual road driving.

[0023] Furthermore, determining the region to be controlled in the two liquid crystal films includes:

[0024] The positioning triangle is determined using the positions of the light source, the driver's eye position, and the camera unit as vertices;

[0025] The interior angles of the positioning triangle with the driver's eye position as the vertex are obtained based on the distance between the driver's eye position and the light source, the distance between the light source and the camera unit, and the interior angles of the positioning triangle with the camera unit as the vertex.

[0026] Based on the interior angle of the positioning triangle with the driver's eye position as the vertex, and the distance between the driver's eye position and the camera unit, the distance between the control point on the windshield and the camera unit is obtained.

[0027] The position of the point to be controlled is determined based on the distance between the point to be controlled and the camera unit;

[0028] Based on the location of the point to be controlled, a controllable area is determined; the controllable area includes a specified range around the point to be controlled on the windshield.

[0029] The camera unit can capture light sources in front of the vehicle, such as the high beams of oncoming lanes and ambient light conditions. It can obtain light intensity information in a very detailed area in front of the driver's field of vision. Through algorithms, the direction of light can be accurately calculated, thereby finely controlling the deflection angle of each liquid crystal pixel to achieve a smooth transition of the light transmittance of the entire windshield.

[0030] Based on the same inventive concept, this application also proposes a windshield control system according to the aforementioned windshield control method, the system comprising:

[0031] The information acquisition module is used to acquire real-time information about the external environment and driver behavior; and

[0032] The control module is used to control the liquid crystal molecules in the two layers of liquid crystal films in a designated area inside the windshield to deflect in a designated direction according to the external environment information and driver behavior information, until the liquid crystal molecules in the two layers of liquid crystal films form an angle of a designated angle.

[0033] Furthermore, the control module includes:

[0034] The calculation module is used to analyze the external environment information and the driver behavior information to obtain the current lighting scene;

[0035] The matching module is used to match the lighting scene with multiple preset lighting scene types to obtain the lighting scene type to which the current lighting scene belongs; and

[0036] The liquid crystal molecule control module is used to control the deflection of liquid crystal molecules in the two layers of liquid crystal film according to the positional relationship of liquid crystal molecules corresponding to the type of light scene to which the current light scene belongs.

[0037] Furthermore, the liquid crystal molecule control module includes: a first control unit, used to control the liquid crystal molecules in the two layers of liquid crystal film to be parallel to each other when the current lighting scene belongs to a first lighting scene type; the first lighting scene type includes scenes where the overall ambient brightness is lower than a preset value;

[0038] The second control unit is configured to, when the current lighting scene belongs to a second lighting scene type, determine the area to be controlled in the two layers of liquid crystal films, and control the liquid crystal molecules in the area to be controlled to form a specified non-zero angle; the second lighting scene type includes a scene where light shines from a light source outside the vehicle into the vehicle; and

[0039] The third control unit is used when the current lighting scene belongs to the third lighting scene type, the liquid crystal molecules in the two layers of liquid crystal film are parallel to each other and each forms a specified non-zero angle with the horizontal road surface; the third lighting scene type includes scenes that cause a specified degree of glare in the driver's field of vision.

[0040] Furthermore, the second control unit includes:

[0041] A construction unit is used to determine the positioning triangle with the positions of the light source, the driver's eye position, and the camera unit as vertices;

[0042] The first calculation unit is used to obtain the interior angle of the positioning triangle with the driver's eye position as the vertex based on the distance between the driver's eye position and the light source, the distance between the light source and the camera unit, and the interior angle of the positioning triangle with the camera unit as the vertex.

[0043] The second calculation unit is used to obtain the distance between the control point on the windshield and the camera unit based on the interior angle of the positioning triangle with the driver's eye position as the vertex and the distance between the driver's eye position and the camera unit.

[0044] A positioning unit is used to determine the position of the point to be controlled based on the distance between the point to be controlled and the camera unit; and

[0045] The control area determination unit is used to determine the control area based on the location of the control point; the control area includes a specified range of area around the control point on the windshield.

[0046] Based on the same inventive concept, this application also proposes a computer device, including a processor and a memory, wherein the memory is used to store a computer program, and the computer program, when executed by the processor, implements the windshield control method as described above.

[0047] Based on the same inventive concept, this application also proposes an automobile that includes the computer equipment as described above.

[0048] It should be noted that since the car in this embodiment is based on the same inventive concept as the windshield control method in the above embodiments, the corresponding content in the method embodiment is also applicable to this system embodiment, and will not be described in detail here.

[0049] In summary, this application belongs to the field of display technology and proposes a windshield control method, system, device, and automobile. It acquires real-time information about the external environment and driver behavior through a camera unit. Based on this information, it controls the liquid crystal molecules in two layers of liquid crystal films in a designated area on the inner side of the windshield to deflect in a designated direction until the liquid crystal molecules in the two layers form a designated angle. By controlling the angle between the liquid crystal molecules in the two layers of liquid crystal films in a designated area on the inner side of the windshield, this application achieves control over the windshield's light transmittance according to specific scene characteristics, protecting the driver's eyes, providing a clear field of vision, and ensuring driving safety. Moreover, the liquid crystal control area of ​​this application can achieve pixel-level control, precisely controlling each liquid crystal pixel and accurately controlling the location where light transmittance needs to be changed, without requiring the entire windshield to change synchronously, resulting in high control precision.

[0050] Compared with the prior art, this application has at least the following beneficial effects:

[0051] This application achieves windshield transmittance control based on specific scene characteristics by controlling the angle between liquid crystal molecules in two layers of liquid crystal films in a designated area on the inner side of the windshield. This protects the driver's eyes, provides a clear field of vision, and ensures driving safety. Moreover, the liquid crystal control area of ​​this application can achieve pixel-level control, precisely controlling each liquid crystal pixel and precisely controlling the location where transmittance needs to be changed, without requiring the entire windshield to change synchronously. At the same time, it can steplessly adjust the transmittance, allowing for a smooth transition between low and high transmittance, reducing visual discomfort for the driver. The control area can also change according to the driver's head or eye position, further protecting the driver's eyes. Attached Figure Description

[0052] Figure 1 This is a schematic flowchart of a windshield control method shown in an embodiment of this application.

[0053] Figure 2 This is a schematic diagram of the windshield structure shown in an embodiment of this application.

[0054] Figure 3 This is a schematic diagram illustrating the method for determining the region to be controlled, as shown in an embodiment of this application.

[0055] Figure 4 This is a schematic diagram of a windshield control system shown in an embodiment of this application.

[0056] Figure 5 This is a schematic diagram of the computer device structure shown in the embodiments of this application. Detailed Implementation

[0057] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0058] Example 1:

[0059] See Figure 1 This is a schematic diagram of the windshield control method shown in the embodiments of this application.

[0060] Specifically, this application proposes a windshield control method, the method comprising:

[0061] The camera unit acquires real-time information about the external environment and driver behavior.

[0062] Based on the external environment information and driver behavior information, the liquid crystal molecules in the two layers of liquid crystal films in the designated area inside the windshield are controlled to deflect in a designated direction until the liquid crystal molecules in the two layers of liquid crystal films form a designated angle.

[0063] The external environment information includes the external light conditions, such as ambient brightness and whether there is direct sunlight; the driver behavior information includes the driver's eye position and head movement information.

[0064] In a preferred embodiment of this application, such as Figure 2 This is a schematic diagram of the windshield structure shown in an embodiment of this application.

[0065] In this embodiment, the specific steps for implementing windshield control are as follows:

[0066] 1) Receive images from the front camera outside the vehicle, analyze the current ambient brightness, whether there is high beam illumination from the opposite direction, and track the changes and displacement of abnormal bright spots; receive images from the in-vehicle camera, analyze the driver's head and eye movement status, the driver's eye gaze position, etc.

[0067] 2) Based on the results of the two analyses above, if it is daytime and the ambient light is too strong and irritates the driver's eyes, then the output control signal will reduce the transmittance of the entire liquid crystal film to reduce the brightness of the light entering the driver's eyes.

[0068] If the sun is directly above and in front of the driver's eyes, the system outputs a control signal to the liquid crystal film based on the position of the driver's eyes captured by the in-vehicle camera. This reduces the light transmittance of a certain area of ​​the liquid crystal film at that corresponding position, protecting the driver's eyes. The light transmittance of other areas remains unaffected. If the driver's head or eyes move, the position of this control area will also be adjusted accordingly, and the light transmittance will be adjusted appropriately based on the brightness.

[0069] If it is nighttime and the external brightness is low, control the two layers of liquid crystal molecules to deflect them into a parallel state, so that the entire film is in a fully transparent state.

[0070] At night, when high beams or diffused light shine into the driver's cabin, the two layers of liquid crystal molecules in the area where the light is incident on the driver are deflected at a certain angle. Transmittance is highest when the angle is 0° and lowest when they are perpendicular. The controller calculates the angle between the two layers of liquid crystal molecules based on the intensity of the high beam and the angle at which it strikes the windshield. The stronger the light intensity, the larger the angle and the lower the transmittance, thus reducing eye strain for the driver. Other areas maintain high transmittance, ensuring unobstructed vision for the driver.

[0071] In rainy weather, external light produces a lot of scattered glare, making it difficult for drivers to observe external road conditions. At this time, the controller outputs a polarization control signal to make the angle between the liquid crystal molecules of the two layers of liquid crystal film 0, with the highest light transmittance, but forming a certain angle with the horizontal direction of the road surface to eliminate most of the glare reflected from the road surface, so that the driver can clearly observe the road conditions.

[0072] 3) The liquid crystal driver installed in the vehicle receives the control signal from the controller and generates a corresponding electrical signal with sufficient strength. This electrical signal can drive the liquid crystal molecules in the liquid crystal film to deflect. The deflected liquid crystal molecules have the effect of reducing transmittance or filtering polarized light.

[0073] 4) The liquid crystal film is bonded to the inside of the windshield. The film has two layers, each containing liquid crystal molecules, and the rotation direction of the internal liquid crystal molecules can be independently controlled. Adjusting the relative rotation angle between the two layers of liquid crystal molecules controls different light transmittance. When they are perpendicular to each other, the light transmittance is minimized, and when they are parallel, the light transmittance is maximized. At this point, a polarization effect is achieved, which can filter glare. However, in order to achieve the maximum elimination of ground glare, the rotation direction of the two liquid crystal films also needs to be at a certain angle to the ground and the road surface.

[0074] 5) The liquid crystal control area in this embodiment can achieve pixel-level control, precisely controlling each liquid crystal pixel and precisely controlling the position where the light transmittance needs to be changed. At the same time, it can steplessly adjust the light transmittance, so that the time between low light transmittance and high light transmittance can be smoothly transitioned without making the driver feel uncomfortable. It can also change the control area according to the position of the driver's head or eyes, thus better protecting the driver's eyes.

[0075] 6) In this embodiment, both the camera and the controller can use the existing hardware of the camera and controller of the intelligent driving control system, without the need for further structural modifications.

[0076] This technology controls the angle between liquid crystal molecules in two layers of liquid crystal film in a designated area on the inside of the windshield, thereby controlling the light transmittance of the windshield according to specific scene characteristics, protecting the driver's eyes, providing the driver with a clear field of vision, and ensuring driving safety. Moreover, the liquid crystal control area proposed in this application achieves precise control down to each liquid crystal pixel, precisely controlling the position where the light transmittance needs to be changed, without requiring the entire windshield to change synchronously.

[0077] Furthermore, the step of controlling the liquid crystal molecules in the two layers of liquid crystal films in a designated area inside the windshield to deflect in a designated direction based on the external environment information and driver behavior information, until the liquid crystal molecules in the two layers of liquid crystal films form a designated angle, includes:

[0078] By combining the external environment information and the driver behavior information, the current lighting scene is obtained;

[0079] The lighting scene is matched with multiple preset lighting scene types to obtain the lighting scene type to which the current lighting scene belongs;

[0080] The positional relationship of liquid crystal molecules in the two layers of liquid crystal film is controlled according to the type of lighting scene to which the current lighting scene belongs.

[0081] By matching and identifying the current lighting scene type, and then controlling the positional relationship of the liquid crystal molecules accordingly, the windshield's light transmission mode can be quickly changed based on environmental information and driver status, providing the driver with a clear view and ensuring driving safety.

[0082] Furthermore, the preset lighting scene types include a first lighting scene type, a second lighting scene type, and a third lighting scene type; controlling the positional relationship of liquid crystal molecules in the two liquid crystal films according to the lighting scene type to which the current lighting scene belongs includes:

[0083] When the current lighting scene belongs to the first lighting scene type, the liquid crystal molecules in the two layers of liquid crystal film are controlled to be parallel to each other.

[0084] When the current lighting scene belongs to the second lighting scene type, the region to be controlled in the two layers of liquid crystal film is determined, and the liquid crystal molecules in the region to be controlled are controlled to form an angle of a specified non-zero angle.

[0085] When the current lighting scene belongs to the third lighting scene type, the liquid crystal molecules in the two layers of liquid crystal film are parallel to each other and each forms a specified non-zero angle with the horizontal road surface.

[0086] By controlling the liquid crystal molecules to form different angles according to different lighting conditions, the light transmittance of the windshield can be flexibly changed according to the ambient light level and driver status information. At the same time, it can flexibly adjust the light transmittance of specific areas on the windshield, that is, the position corresponding to the driver's line of sight, with high control precision.

[0087] Furthermore, the first lighting scene type includes scenes where the overall ambient brightness is lower than a preset value;

[0088] The second lighting scene type includes scenes where light shines into the vehicle from a light source outside the vehicle;

[0089] The third lighting scene type includes scenes that produce a specified degree of glare in the driver's field of vision.

[0090] In the second lighting scene type, the light can be light with a specified intensity or light with a distance between the light source and the vehicle within a specified threshold.

[0091] Preset lighting scene types were designed for several special lighting scenarios. These types are representative and frequently occur during actual road driving.

[0092] Furthermore, determining the region to be controlled in the two liquid crystal films includes:

[0093] The positioning triangle is determined using the positions of the light source, the driver's eye position, and the camera unit as vertices;

[0094] The interior angles of the positioning triangle with the driver's eye position as the vertex are obtained based on the distance between the driver's eye position and the light source, the distance between the light source and the camera unit, and the interior angles of the positioning triangle with the camera unit as the vertex.

[0095] Based on the interior angle of the positioning triangle with the driver's eye position as the vertex, and the distance between the driver's eye position and the camera unit, the distance between the control point on the windshield and the camera unit is obtained.

[0096] The position of the point to be controlled is determined based on the distance between the point to be controlled and the camera unit;

[0097] Based on the location of the point to be controlled, a controllable area is determined; the controllable area includes a specified range around the point to be controlled on the windshield.

[0098] Reference Figure 3 This is a schematic diagram illustrating the method for determining the controlled area in an embodiment of this application.

[0099] like Figure 3 Point A is a forward-facing camera installed facing outwards, and an in-vehicle camera is installed facing inwards; point B is the driver's eye position; point C is the high beam position; point O is the liquid crystal transmittance control point; a is the distance between the high beam and the driver; b is the distance between the high beam and the external camera; c is the distance between the in-vehicle camera and the driver; α is the angle between the lens normal of the forward-facing camera and the high beam light; β is the angle between the lens normal of the in-vehicle camera and the line connecting the driver's eye.

[0100] The image of an object captured by the camera is formed on the camera's CCD image plane. This image contains information about the object's shape, size, and position. The pixels of the image can be mapped to points on the actual object's surface, thus establishing a correspondence between the pixels and the points on the actual object's surface.

[0101] Based on the above correspondence, the coordinates of a pixel in the image can be determined. Combining the camera's intrinsic and extrinsic parameters, the angle between the incident ray corresponding to the pixel and the camera's optical axis can be calculated using the principles of trigonometric geometry.

[0102] By using angle calculations and triangulation principles, the distance between the object being measured and the camera can be calculated. Specifically, using known pixel coordinates, the coordinates of points on the actual object's surface, and the calculated angle, the distance between points on the object's surface and the optical center of the camera can be calculated using triangulation principles.

[0103] The distances b and c, and the angles α and β can be calculated using the principles described above.

[0104] According to the formulas for the side length and angle of a triangle, we have: a 2 =b 2 +c 2 -2bc*cosA (Equation 1);

[0105]

[0106] From equation 3, we get:

[0107] From equation 2, we get:

[0108] The angle B is calculated using Equation 4, and then angle B is substituted into Equation 5 to calculate l. AO Length, l AOGiven the distance from the camera position to the liquid crystal transmittance control point, and the relative position of the camera installation position on the windshield, the position of point O on the windshield can be determined by converting the relative position. Then, by controlling the deflection of liquid crystal molecules within a certain range of O, the position of the transmittance point can be precisely controlled.

[0109] The camera unit can capture light sources in front of the vehicle, such as the high beams of oncoming lanes and ambient light conditions. It can obtain light intensity information in a very detailed area in front of the driver's field of vision. Through algorithms, the direction of light can be accurately calculated, thereby finely controlling the deflection angle of each liquid crystal pixel to achieve a smooth transition of the light transmittance of the entire windshield.

[0110] Example 2:

[0111] Based on the same inventive concept, this application also proposes a windshield control system according to the aforementioned windshield control method, the system comprising:

[0112] The information acquisition module is used to acquire real-time information about the external environment and driver behavior; and

[0113] The control module is used to control the liquid crystal molecules in the two layers of liquid crystal films in a designated area inside the windshield to deflect in a designated direction according to the external environment information and driver behavior information, until the liquid crystal molecules in the two layers of liquid crystal films form an angle of a designated angle.

[0114] Reference Figure 4 This is a schematic diagram of a windshield control system shown in an embodiment of this application.

[0115] In this embodiment, the exterior front camera is installed above the windshield and is responsible for capturing images of the front of the vehicle and transmitting them to the controller; the interior camera is installed in the driver's cab, facing the driver's head, and is responsible for capturing the position of the driver's eyes.

[0116] Both the exterior front camera and the interior camera are connected to a controller, which is connected to an LCD driver, which in turn is connected to the LCD film on the windshield.

[0117] In this embodiment, the controller is responsible for processing the images input from the camera and outputting control signals to the liquid crystal driver; the liquid crystal driver is installed in the vehicle and, after receiving the control signals, generates an electrical signal with sufficient strength to drive the liquid crystal molecules in the liquid crystal film of the windshield to deflect.

[0118] Furthermore, the control module includes:

[0119] The calculation module is used to analyze the external environment information and the driver behavior information to obtain the current lighting scene;

[0120] The matching module is used to match the lighting scene with multiple preset lighting scene types to obtain the lighting scene type to which the current lighting scene belongs; and

[0121] The liquid crystal molecule control module is used to control the deflection of liquid crystal molecules in the two layers of liquid crystal film according to the positional relationship of liquid crystal molecules corresponding to the type of light scene to which the current light scene belongs.

[0122] Furthermore, the liquid crystal molecule control module includes: a first control unit, used to control the liquid crystal molecules in the two layers of liquid crystal film to be parallel to each other when the current lighting scene belongs to a first lighting scene type; the first lighting scene type includes scenes where the overall ambient brightness is lower than a preset value;

[0123] The second control unit is configured to, when the current lighting scene belongs to a second lighting scene type, determine the area to be controlled in the two layers of liquid crystal films, and control the liquid crystal molecules in the area to be controlled to form a specified non-zero angle; the second lighting scene type includes a scene where light shines from a light source outside the vehicle into the vehicle; and

[0124] The third control unit is used when the current lighting scene belongs to the third lighting scene type, the liquid crystal molecules in the two layers of liquid crystal film are parallel to each other and each forms a specified non-zero angle with the horizontal road surface; the third lighting scene type includes scenes that cause a specified degree of glare in the driver's field of vision.

[0125] Furthermore, the second control unit includes:

[0126] A construction unit is used to determine the positioning triangle with the positions of the light source, the driver's eye position, and the camera unit as vertices;

[0127] The first calculation unit is used to obtain the interior angle of the positioning triangle with the driver's eye position as the vertex based on the distance between the driver's eye position and the light source, the distance between the light source and the camera unit, and the interior angle of the positioning triangle with the camera unit as the vertex.

[0128] The second calculation unit is used to obtain the distance between the control point on the windshield and the camera unit based on the interior angle of the positioning triangle with the driver's eye position as the vertex and the distance between the driver's eye position and the camera unit.

[0129] A positioning unit is used to determine the position of the point to be controlled based on the distance between the point to be controlled and the camera unit; and

[0130] The control area determination unit is used to determine the control area based on the location of the control point; the control area includes a specified range of area around the control point on the windshield.

[0131] Example 3:

[0132] Reference Figure 5 This is a schematic diagram of the computer device structure shown in an embodiment of this application.

[0133] Based on the same inventive concept, this application also proposes a computer device, including a processor and a memory, wherein the memory is used to store a computer program, and the computer program, when executed by the processor, implements the windshield control method as described above.

[0134] like Figure 5 As shown, the computer device 5 of this embodiment includes: at least one processor 50 ( Figure 5 (Only one is shown in the diagram), memory 51, and computer program 52 stored in the memory 51 and executable on the at least one processor 50, wherein the processor 50 executes the computer program 52 to implement the steps in any of the above method embodiments.

[0135] The computer device 5 may be a mobile device, including but not limited to user mobile devices such as mobile phones, laptops, tablets, and smartwatches; it may also be an in-vehicle mobile device, including but not limited to in-vehicle infotainment systems and central control screens. It is understood that the specific structure and function of in-vehicle mobile devices differ between different vehicle models and manufacturers. This electronic device may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art will understand that... Figure 5 The computer device 5 is merely an example and does not constitute a limitation on the computer device 5. It may include more or fewer components than shown in the figure, or combine certain components, or different components, such as input / output devices, network access devices, etc.

[0136] The processor 50 may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0137] In some embodiments, the memory 51 may be an internal storage unit of the computer device 5, such as a hard disk or memory of the computer device 5. In other embodiments, the memory 51 may be an external storage device of the computer device 5, such as a plug-in hard disk, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the computer device 5. Furthermore, the memory 51 may include both internal and external storage units of the computer device 5. The memory 51 is used to store the operating system, applications, bootloader, data, and other programs, such as the program code of the computer program. The memory 51 can also be used to temporarily store data that has been output or will be output.

[0138] Example 4:

[0139] Based on the same inventive concept, this application also proposes an automobile that includes the computer equipment as described above.

[0140] It should be noted that since the car in this embodiment is based on the same inventive concept as the windshield control method in the above embodiments, the corresponding content in the method embodiment is also applicable to this system embodiment, and will not be described in detail here.

[0141] In summary, this application belongs to the field of display technology and proposes a windshield control method, system, device, and automobile. It acquires real-time information about the external environment and driver behavior through a camera unit. Based on this information, it controls the liquid crystal molecules in two layers of liquid crystal films in a designated area on the inner side of the windshield to deflect in a designated direction until the liquid crystal molecules in the two layers form a designated angle. By controlling the angle between the liquid crystal molecules in the two layers of liquid crystal films in a designated area on the inner side of the windshield, this application achieves control over the windshield's light transmittance according to specific scene characteristics, protecting the driver's eyes, providing a clear field of vision, and ensuring driving safety. Moreover, the liquid crystal control area of ​​this application can achieve pixel-level control, precisely controlling each liquid crystal pixel and precisely controlling the location where the light transmittance needs to be changed, without requiring the entire windshield to change synchronously, resulting in high control precision.

[0142] In the several embodiments provided in this application, it will be understood that each block in the flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those shown in the figures. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved.

[0143] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause an electronic device to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0144] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above descriptions are merely specific embodiments of this application and are not intended to limit the scope of protection of this application. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application for those skilled in the art.

Claims

1. A windshield control method characterized by, The method comprises: Real-time acquisition of vehicle external environment information and driver behavior information by a camera unit; Analysis of the vehicle external environment information and the driver behavior information to obtain a current light scene; Matching the light scene with a plurality of preset light scene types to obtain a light scene type to which the current light scene belongs; the preset light scene types include a first light scene type, a second light scene type, and a third light scene type; According to the light scene type to which the current light scene belongs, the liquid crystal molecules in the two liquid crystal films in the specified area on the inner side of the windshield are controlled to deflect in a specified direction until the liquid crystal molecules in the two liquid crystal films form an included angle of a specified angle; When the current light scene belongs to the first light scene type, the liquid crystal molecules in the two liquid crystal films are controlled to be parallel to each other; When the current light scene belongs to the second light scene type, a to-be-controlled area in the two liquid crystal films is determined, and the liquid crystal molecules in the to-be-controlled area are controlled to form an included angle of a specified non-zero angle; When the current light scene belongs to the third light scene type, the liquid crystal molecules in the two liquid crystal films are parallel to each other and form an included angle of a specified non-zero angle with the horizontal road surface.

2. The windshield control method of claim 1, wherein The first light scene type includes a scene in which the overall brightness of the environment is lower than a preset value; The second light scene type includes a scene in which light from an external light source irradiates the driver in the vehicle; The third light scene type includes a scene in which a specified degree of glare phenomenon occurs in the driver's field of view.

3. A windscreen control method according to claim 2, characterized in that The determination of the to-be-controlled area in the two liquid crystal films comprises: Determining a positioning triangle with the positions of the light source, the driver's eye position, and the camera unit as vertices; According to the distance between the driver's eye position and the light source, the distance between the light source and the camera unit, and the internal angle of the positioning triangle with the camera unit as a vertex, the internal angle of the positioning triangle with the driver's eye position as a vertex is obtained; According to the internal angle of the positioning triangle with the driver's eye position as a vertex and the distance between the driver's eye position and the camera unit, the distance between a to-be-controlled point on the windshield and the camera unit is obtained; According to the distance between the to-be-controlled point and the camera unit, the position of the to-be-controlled point is determined; According to the position of the to-be-controlled point, the to-be-controlled area is determined; the to-be-controlled area includes a specified range of area around the to-be-controlled point on the windshield.

4. A windshield control system according to the windshield control method of any one of claims 1 to 3, characterized by, The system comprises: An information acquisition module for real-time acquisition of vehicle external environment information and driver behavior information; and A control module for controlling the liquid crystal molecules in the two liquid crystal films in a specified area on the inner side of the windshield to deflect in a specified direction according to the vehicle external environment information and the driver behavior information until the liquid crystal molecules in the two liquid crystal films form an included angle of a specified angle.

5. A windscreen control system according to claim 4, characterized in that The control module comprises: A calculation module for analyzing the vehicle external environment information and the driver behavior information to obtain a current light scene; A matching module for matching the light scene with a plurality of preset light scene types to obtain a light scene type to which the current light scene belongs; and The liquid crystal molecule control module is configured to control the deflection of the liquid crystal molecules in the two-layer liquid crystal film according to a corresponding liquid crystal molecule position relationship of a light scene type to which a current light scene belongs. The liquid crystal molecule control module includes a first control unit configured to control the liquid crystal molecules in the two-layer liquid crystal film to be parallel to each other when the current light scene belongs to a first light scene type, and the first light scene type includes a scene in which the overall brightness of an environment is lower than a preset value. The liquid crystal molecule control module further includes a second control unit configured to determine a to-be-controlled region in the two-layer liquid crystal film and control the liquid crystal molecules in the to-be-controlled region to form a specified non-zero angle when the current light scene belongs to a second light scene type, and the second light scene type includes a scene in which light is irradiated from a light source outside a vehicle to inside the vehicle. The liquid crystal molecule control module further includes a third control unit configured to control the liquid crystal molecules in the two-layer liquid crystal film to be parallel to each other and form a specified non-zero angle with a horizontal road surface when the current light scene belongs to a third light scene type, and the third light scene type includes a scene in which a specified degree of glare phenomenon is generated in a driver's field of view.

6. A windscreen control system according to claim 5, wherein, The second control unit includes: a construction unit configured to determine a positioning triangle with a light source, a driver's eye position, and a position of a camera unit as vertices; a first calculation unit configured to obtain an internal angle of the positioning triangle with the driver's eye position as a vertex according to a distance between the driver's eye position and the light source, a distance between the light source and the camera unit, and an internal angle of the positioning triangle with the camera unit as a vertex; a second calculation unit configured to obtain a distance between a to-be-controlled point on the windshield and the camera unit according to the internal angle of the positioning triangle with the driver's eye position as a vertex and the distance between the driver's eye position and the camera unit; a positioning unit configured to determine a position of the to-be-controlled point according to the distance between the to-be-controlled point and the camera unit; and a to-be-controlled region determination unit configured to determine a to-be-controlled region according to the position of the to-be-controlled point, and the to-be-controlled region includes a specified range of regions around the to-be-controlled point on the windshield.

7. A computer device, comprising: The computer device includes a processor and a memory configured to store a computer program, and the computer program is executed by the processor to implement the windshield control method according to any one of claims 1-3.

8. An automobile characterized by comprising: The vehicle includes the computer device according to claim 7.

Images