Automobile display screen control system and method based on human-computer interaction

Abstract

The invention discloses an automobile display screen control system and method based on man-machine interaction, and belongs to the technical field of display screen control, the system comprises an information acquisition module, an information storage module, an information analysis processing module, an information output module and a display screen adjustment module; the information acquisition module is used for acquiring face information of a driver after the driver enters a driving position and position information of a display screen; the collected information is stored in a database through the information storage module; the collected face position information of the driver is analyzed and processed through the information analyzing and processing module, the face position information is compared with the set angle range of the optimal view angle, and the position, needing to be moved, of the display screen in the optimal view angle range is analyzed and calculated; an adjusting instruction is output through the information output module; the position of the display screen is adjusted through the display screen adjusting module according to the data processing result, the display screen is adjusted to be within the optimal visual angle range of a driver, and therefore the utilization rate of the automobile display screen is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen control, and in particular to a car display screen control system and method based on human-computer interaction. Background Art

[0002] Human-computer interaction is the science that studies the ways in which humans and computers communicate and interact. It has been widely used in various industries, such as automotive research and development, education, medical care, and e-commerce. In the field of automotive research and development, it is mostly used in the functional development of automotive displays. With the addition of human-computer interaction functions, automotive displays provide users with more diverse and more convenient functions. Human-computer interaction has greatly enhanced the diversity of automotive display functions and the convenience of operation.

[0003] However, there is still a lot of room for improvement in the practical application of automobile display screen control. For example, the placement of the central control display screen and its angle relative to the front of the driver's face directly affect the efficiency of the display screen. In addition, for display screens with inappropriate positions and angles, the driver is always required to lower his head for a long time, or frequently turn his head to view the required information on the display screen, which will create great safety hazards. Therefore, a method is needed to adjust the position of the display screen according to the optimal viewing angle range of the human eye to reduce safety hazards during driving. Summary of the invention

[0004] The purpose of the present invention is to provide a car display screen control system and method based on human-computer interaction to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a car display screen control system based on human-computer interaction, the system comprising an information acquisition module, an information storage module, an information analysis and processing module, an information output module and a display screen adjustment module;

[0006] The information collection module collects the driver's facial information and the position information of the driver's facial geometric points and the display screen geometric points;

[0007] The collected location information is stored in a database through the information storage module;

[0008] Analyze and process the collected position information through the information analysis and processing module and generate adjustment instructions;

[0009] Outputting adjustment instructions through the information output module;

[0010] The display screen adjustment module adjusts the display screen position according to the data processing result.

[0011] Furthermore, the information collection module includes a facial recognition unit and a target positioning unit. The information collection module includes a facial recognition unit and a target positioning unit. The facial recognition unit is used to collect the driver's facial information, and the target positioning unit is used to collect the positions of the driver's facial geometric points and the positions between the display screen's geometric points. The target positioning unit can be completed using multi-camera visual positioning and tracking technology.

[0012] Furthermore, the information analysis and processing module includes an initial information processing unit, an optimal viewing angle setting unit and a comparative analysis unit; the initial information processing unit is used to analyze and process the collected position information of the driver's facial geometric particles and the display screen geometric particles to obtain the relative position and angle between the two; the optimal viewing angle setting unit sets the critical distance value for the display screen to enter the area according to the critical angle value of the optimal viewing angle area; the comparative analysis unit compares and analyzes the analysis results of the initial information with the data of the set critical area to determine whether the display screen position needs to be adjusted. If adjustment is required, the distance to be adjusted is further calculated and an adjustment instruction is generated.

[0013] Furthermore, the initial information processing unit constructs a three-dimensional model based on the collected initial position information, thereby analyzing and processing the collected position information of the driver's facial geometric particles and the display screen geometric particles. In this model, the relative distance between the two is obtained and the relative angle is calculated through analysis of their position information, which is used for subsequent comparison and analysis with the critical angle of the optimal viewing area.

[0014] Furthermore, the optimal viewing angle setting unit sets a critical angle of the optimal viewing angle area and constructs a three-dimensional model, in which the relative angle between the geometric particle position of the driver's face and the geometric particle position of the display screen under this critical condition is specified, and the critical position of the optimal viewing angle area is calculated based on the critical angle; the optimal viewing angle range determined by human biological characteristics is approximately 10 to 20 degrees, which can accurately identify image details, and is more sensitive to dynamic objects within the range of 20 to 30 degrees. At 36 degrees in the horizontal direction and 20 degrees in the vertical direction, a sense of presence can be obtained, but frequent movement of the eyeballs can cause eye fatigue. Therefore, the critical angle value of the optimal viewing angle area can be set accordingly; and then the position of the display screen is adjusted to a suitable position based on the set data, so that the driver can view the information presented on the display screen within the optimal viewing angle range while paying attention to the road conditions ahead, such as the navigation route.

[0015] Furthermore, the comparison and analysis unit compares the initial angle obtained by analyzing the initial position information of the driver's facial geometric particles and the display screen's geometric particles with the critical angle value of the set optimal viewing angle area, and determines whether the display screen position needs to be adjusted. If no adjustment is required, no adjustment instruction is generated. If adjustment is required, the distance required to be adjusted is further calculated and an adjustment instruction is generated.

[0016] A method for controlling a car display screen based on human-computer interaction comprises the following steps:

[0017] S1: Collect the driver's facial information when he is sitting in the cockpit, as well as the positions of his facial geometric points and the display screen geometric points;

[0018] S2: Perform data analysis on the collected information;

[0019] S3: Analyze and compare the collected initial data analysis results with the data of the set optimal viewing angle area, determine whether the display screen position needs to be adjusted according to the analysis results, and generate an adjustment instruction;

[0020] S4: Output adjustment instruction;

[0021] S5: Control the display screen to adjust to the optimal viewing angle area according to the adjustment instruction.

[0022] Further, in step S2: the collected initial position information of the driver's facial geometric particles and the display screen geometric particles are analyzed and processed, and a three-dimensional model is constructed according to the initial position information of the two; in this model, the position of the driver's facial geometric particles is A, the position of the display screen geometric particles is B, and a spatial rectangular coordinate system is established with A as the origin, and point B is located at the other end point of the body diagonal of the cube model with A as a vertex, and the coordinate of point B is set to B(x1, y1, z1), then the lengths of the projection of line segment AB on the coordinate axes x, y, and z are |x1|, |y1|, |z1| respectively, the angle between the projection of line segment AB on the xAy plane and the y axis is ω1, and the angle between the projection of line segment AB on the yAz plane and the y axis is ω2, according to the formula:

[0023]

[0024] Among them, |y1| represents the front-to-back distance between the geometric mass point of the driver's face and the geometric mass point of the display screen in three-dimensional space. During the process of adjusting the position of the display screen, this distance remains unchanged, so the angle value between the geometric mass point of the driver's face and the geometric mass point of the display screen in the initial state can be calculated according to the above formula.

[0025] Further, in step S3: the processing result of the collected information is compared and analyzed with the data information of the set optimal viewing angle range; it is necessary to construct a three-dimensional model, and calculate the critical position of the optimal viewing angle area according to the critical angle of the optimal viewing angle area through this model, and use A' to represent the geometric mass point of the driver's face under the critical condition, and use B' to represent the geometric mass point of the display screen under the critical condition. A' is used as the origin to establish a spatial rectangular coordinate system, and the critical angle on the xA'y plane is specified to be 2α, and the critical angle on the yA'z plane is specified to be 2β. The lengths of the projections of A'B' on the x, y, and z axes are set to be a, b, and c, respectively, and the formula is used:

[0026] a = btan 2α;

[0027] c = btan 2β;

[0028] b = |y1|;

[0029] The values ​​of a and c can be obtained;

[0030] Compare ω1 with 2α, and ω2 with 2β to determine whether the display screen position needs to be adjusted. The comparison results include the following four situations:

[0031] When ω1≤2α and ω2≤2β, it means that the initial position of the display screen is within the driver's optimal viewing angle area, and the display screen position does not need to be adjusted, and no adjustment instruction is generated;

[0032] When ω1>2α and ω2≤2β, it means that the angle between the initial position of the display screen and the driver's face on the xAy plane exceeds the critical angle of the optimal viewing angle area. In this case, it is necessary to calculate the distance between the two that needs to be adjusted along the x-axis direction and generate an adjustment instruction.

[0033] When ω1≤2α and ω2>2β, it means that the angle between the initial position of the display screen and the driver's face on the yAz plane exceeds the critical angle of the optimal viewing angle area. In this case, it is necessary to calculate the distance between the two that needs to be adjusted along the z-axis direction and generate an adjustment instruction.

[0034] When ω1>2α and ω2>2β, it means that the angle between the initial position of the display screen and the driver's face in the xAy plane and the yAz plane both exceed the critical angle of the optimal viewing angle area. It is necessary to calculate the distance that needs to be adjusted along the x and z axes and generate adjustment instructions.

[0035] Furthermore, in step S3: if the judgment result is that the initial position of the display screen is outside the optimal viewing angle area, the formula is used:

[0036] Δx=|x1-a|;

[0037] Δz=|z1-c|;

[0038] The distances Δx and Δz that the display screen needs to be adjusted are calculated, where Δx is the distance that the display screen needs to be adjusted along the x-axis direction, and Δz is the distance that the display screen needs to be adjusted along the z-axis direction.

[0039] Compared with the prior art, the beneficial effect achieved by the present invention is that the present invention collects facial information through cameras and sensors and then analyzes and compares it with the optimal viewing angle range, so that the car display screen can be adjusted to enable the driver to clearly view the content of the display screen while maintaining normal driving movements, and can avoid long-term lowering of the head or frequent turning of the head, thereby avoiding safety hazards caused by untimely acquisition of road information during driving, improving the utilization rate of the car display screen, and reducing safety hazards caused by the driver's need to consider both road conditions and the distraction of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0041] Figure 1 It is a structural schematic diagram of a car display screen control system based on human-computer interaction of the present invention;

[0042] Figure 2 It is a schematic diagram of a three-dimensional model of data acquisition in a car display screen control system based on human-computer interaction of the present invention;

[0043] Figure 3 The invention discloses a three-dimensional model schematic diagram of a critical condition of a car display screen control system based on human-computer interaction. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] See also Figure 1-3 The present invention provides a technical solution: a car display screen control system based on human-computer interaction, the system comprising an information acquisition module, an information storage module, an information analysis and processing module, an information output module and a display screen adjustment module;

[0046] The information collection module collects the driver's facial information and the position information of the driver's facial geometric points and the display screen geometric points;

[0047] The collected location information is stored in a database through the information storage module;

[0048] Analyze and process the collected position information through the information analysis and processing module and generate adjustment instructions;

[0049] Outputting adjustment instructions through the information output module;

[0050] The display screen adjustment module adjusts the display screen position according to the data processing result.

[0051] The information acquisition module includes a facial recognition unit and a target positioning unit. The information acquisition module includes a facial recognition unit and a target positioning unit. The facial recognition unit is used to collect the driver's facial information, and the target positioning unit is used to collect the positions of the driver's facial geometric points and the positions between the display screen's geometric points. The target positioning unit can be completed using multi-camera visual positioning and tracking technology.

[0052] The information analysis and processing module includes an initial information processing unit, an optimal viewing angle setting unit and a comparative analysis unit; the initial information processing unit is used to analyze and process the collected position information of the driver's facial geometric particles and the display screen geometric particles to obtain the relative position and angle between the two; the optimal viewing angle setting unit sets the critical distance value for the display screen to enter the area according to the critical angle value of the optimal viewing angle area; the comparative analysis unit compares and analyzes the analysis results of the initial information with the data of the set critical area to determine whether the display screen position needs to be adjusted. If adjustment is required, the distance to be adjusted is further calculated and an adjustment instruction is generated.

[0053] The initial information processing unit constructs a three-dimensional model based on the collected initial position information, so as to analyze and process the collected position information of the driver's facial geometric particles and the display screen geometric particles. In this model, the relative distance between the two is obtained and the relative angle is calculated through the analysis of their position information, which is used for subsequent comparison and analysis with the critical angle of the optimal viewing area.

[0054] The optimal viewing angle setting unit sets a critical angle of the optimal viewing angle area and constructs a three-dimensional model. In this model, the relative angle between the geometric particle position of the driver's face and the geometric particle position of the display screen under this critical condition is specified, and the critical position of the optimal viewing angle area is calculated according to the critical angle; the optimal viewing angle range determined by human biological characteristics is approximately 10 to 20 degrees, which can accurately identify image details, and is more sensitive to dynamic objects within the range of 20 to 30 degrees. At 36 degrees in the horizontal direction and 20 degrees in the vertical direction, a sense of presence can be obtained, but frequent movement of the eyeballs will cause eye fatigue. Therefore, the critical angle value of the optimal viewing angle area can be set accordingly; and then according to the set data, the position of the display screen is adjusted to a suitable position, so that the driver can view the information presented on the display screen within the optimal viewing angle range while paying attention to the road conditions ahead, such as the navigation route.

[0055] The comparison and analysis unit compares the initial angle obtained by analyzing the initial position information of the driver's facial geometric particles and the display screen geometric particles with the critical angle value of the set optimal viewing angle area, and determines whether the display screen position needs to be adjusted. If no adjustment is required, no adjustment instruction is generated. If adjustment is required, the distance required to be adjusted is further calculated and an adjustment instruction is generated.

[0056] A method for controlling a car display screen based on human-computer interaction comprises the following steps:

[0057] S1: Collect the driver's facial information when he is sitting in the cockpit, as well as the positions of his facial geometric points and the display screen geometric points;

[0058] S2: Perform data analysis on the collected information;

[0059] S3: Analyze and compare the collected initial data analysis results with the data of the set optimal viewing angle area, determine whether the display screen position needs to be adjusted according to the analysis results, and generate an adjustment instruction;

[0060] S4: Output adjustment instruction;

[0061] S5: Control the display screen to adjust to the optimal viewing angle area according to the adjustment instruction.

[0062] In step S2: the collected initial position information of the driver's facial geometric particles and the display screen geometric particles are analyzed and processed, and a three-dimensional model is constructed according to the initial position information of the two; in this model, the position of the driver's facial geometric particles is A, the position of the display screen geometric particles is B, and a spatial rectangular coordinate system is established with A as the origin. Point B is located at the other end point of the body diagonal of the cube model with A as a vertex. The coordinates of point B are set to B(60, 40, 30), then the lengths of the projection of line segment AB on the coordinate axes x, y, and z are |x1|=60, |y1|=40, |z1|=30, respectively, in cm, the angle between the projection of line segment AB on the xAy plane and the y axis is ω1, and the angle between the projection of line segment AB on the yAz plane and the y axis is ω2. According to the formula:

[0063]

[0064] Among them, the projection of AB on the y-axis |y1|=40 represents the front-to-back distance between the driver's facial geometric point and the display screen geometric point in three-dimensional space. During the process of adjusting the position of the display screen, this distance remains unchanged, so the angle values ​​ω1=56°19′ and ω2=37° between the driver's facial geometric point and the display screen geometric point in the initial state can be calculated according to the above formula.

[0065] In step S3: the processing result of the collected information is compared and analyzed with the data information of the set optimal viewing angle range; a three-dimensional model needs to be constructed, and the critical position of the optimal viewing angle area is calculated according to the critical angle of the optimal viewing angle area through this model. The optimal viewing angle range determined by human biological characteristics is approximately 10 to 20 degrees, which can accurately identify image details, and is more sensitive to dynamic objects in the range of 20 to 30 degrees. When the horizontal direction is 36 degrees and the vertical direction is 20 degrees, a sense of presence can be obtained, but frequent rotation of the eyeball will cause eye fatigue. Therefore, the critical angle value of the optimal viewing angle area can be set accordingly, and the horizontal direction is set to 20 degrees and the vertical direction is set to 15 degrees.

[0066] A' is used to represent the geometric mass point of the driver's face under critical conditions, B' is used to represent the geometric mass point of the display screen under critical conditions, and a spatial rectangular coordinate system is established with A' as the origin. The critical angle on the xA'y plane is defined as 2α = 40°, and the critical angle on the yA'z plane is defined as 2β = 30°. The lengths of the projections of A'B' on the x, y, and z axes are a, b, and c, respectively. Using the formula:

[0067] a = btan 2α;

[0068] c = btan 2β;

[0069] b=|y1|=40cm;

[0070] Substituting the values ​​into the formula, we get a = 34 cm, c = 23 cm;

[0071] Compare ω1 obtained in the above process with 2α, and ω2 with 2β to determine whether the display screen position needs to be adjusted. The comparison results are:

[0072] ω1>2α and ω2>2β, which means that the angle between the initial position of the display screen and the driver's face in the xAy plane and the yAz plane in the position information collected this time exceeds the critical angle of the optimal viewing angle area. It is necessary to calculate the distance that the display screen needs to be adjusted along the x and z axes and generate adjustment instructions, using the formula:

[0073] Δx=|x1―a|;

[0074] Δz=|z1―c|;

[0075] The distances that the display screen needs to be adjusted are calculated to be Δx=26cm and Δz=7cm. Based on the calculation results, an adjustment instruction needs to be generated to adjust the display screen 26cm along the negative x direction and 7cm along the negative z direction.

[0076] The above calculation shows the critical position of the display screen within the driver's optimal viewing angle. If there is still space on the sliding track, it can still be adjusted within the optimal viewing angle. The closer the display screen is to the standard viewing angle position, the smaller the driver's head turns, and the more convenient it is to view the information on the display screen.

[0077] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0078] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A car display screen control system based on human-computer interaction, characterized in that: The system includes an information acquisition module, an information storage module, an information analysis and processing module, an information output module and a display screen adjustment module; The information collection module collects the driver's facial information and the position information of the driver's facial geometric points and the display screen geometric points; The collected location information is stored in a database through the information storage module; Analyze and process the collected position information through the information analysis and processing module and generate adjustment instructions; Outputting adjustment instructions through the information output module; The display screen adjustment module adjusts the display screen position according to the data processing result.

2. The automobile display screen control system based on human-computer interaction according to claim 1, characterized in that: The information acquisition module includes a facial recognition unit and a target positioning unit. The facial recognition unit is used to collect the driver's facial information, and the target positioning unit is used to collect the positions of the driver's facial geometric points and the positions between the display screen geometric points.

3. The automobile display screen control system based on human-computer interaction according to claim 1, characterized in that: The information analysis and processing module includes an initial information processing unit, an optimal viewing angle setting unit and a comparative analysis unit; the initial information processing unit is used to analyze and process the collected position information of the driver's facial geometric particles and the display screen geometric particles to obtain the relative position and angle between the two; the optimal viewing angle setting unit sets the critical distance value for the display screen to enter the area according to the critical angle value of the optimal viewing angle area; the comparative analysis unit compares and analyzes the analysis results of the initial information with the data of the set critical area to determine whether the display screen position needs to be adjusted. If adjustment is required, the distance to be adjusted is further calculated and an adjustment instruction is generated.

4. The automobile display screen control system based on human-computer interaction according to claim 3 is characterized in that: The initial information processing unit constructs a three-dimensional model based on the collected initial position information, so as to analyze and process the collected position information of the driver's facial geometric particles and the display screen geometric particles. In this model, the relative distance between the two is obtained and the relative angle is calculated through the analysis of their position information, which is used for subsequent comparison and analysis with the critical angle of the optimal viewing area.

5. The automobile display screen control system based on human-computer interaction according to claim 3 is characterized in that: The optimal viewing angle setting unit sets the critical angle of the optimal viewing angle area and constructs a three-dimensional model. In this model, the relative angle between the geometric particle position of the driver's face and the geometric particle position of the display screen under this critical condition is specified, and the critical position of the optimal viewing angle area is calculated based on the critical angle.

6. The automobile display screen control system based on human-computer interaction according to claim 3 is characterized in that: The comparison and analysis unit compares the initial angle obtained by analyzing the initial position information of the driver's facial geometric particles and the display screen geometric particles with the critical angle value of the set optimal viewing angle area, and determines whether the display screen position needs to be adjusted. If no adjustment is required, no adjustment instruction is generated. If adjustment is required, the distance required to be adjusted is further calculated and an adjustment instruction is generated.

7. A method for controlling a car display screen based on human-computer interaction, characterized in that: The following steps are involved: S1: Collect the driver's facial information when he is sitting in the cockpit, as well as the positions of his facial geometric points and the display screen geometric points; S2: Perform data analysis on the collected information; S3: Analyze and compare the collected initial data analysis results with the data of the set optimal viewing angle area, determine whether the display screen position needs to be adjusted according to the analysis results, and generate an adjustment instruction; S4: Output adjustment instruction; S5: Control the display screen to adjust to the optimal viewing angle area according to the adjustment instruction.

8. The method for controlling a car display screen based on human-computer interaction according to claim 7, characterized in that: In step S2: the collected initial position information of the driver's facial geometric particles and the display screen geometric particles are analyzed and processed, and a three-dimensional model is constructed according to the initial position information of the two; in this model, the position of the driver's facial geometric particles is A, the position of the display screen geometric particles is B, and a spatial rectangular coordinate system is established with A as the origin. Point B is located at the other end point of the body diagonal of the cube model with A as a vertex. The coordinates of point B are set to B(x1, y1, z1), then the lengths of the projection of line segment AB on the coordinate axes x, y, and z are |x1|, |y1|, |z1| respectively, the angle between the projection of line segment AB on the xAy plane and the y axis is ω1, and the angle between the projection of line segment AB on the yAz plane and the y axis is ω2. According to the formula: Among them, the angle value between the geometric mass point of the driver's face and the geometric mass point of the display screen in the initial state is calculated.

9. The method for controlling a car display screen based on human-computer interaction according to claim 7, characterized in that: In step S3: the processing result of the collected information is compared and analyzed with the data information of the set optimal viewing angle range; it is necessary to construct a three-dimensional model, and calculate the critical position of the optimal viewing angle area according to the critical angle of the optimal viewing angle area through this model, and use A' to represent the geometric mass point of the driver's face under the critical condition, and use B' to represent the geometric mass point of the display screen under the critical condition. A' is used as the origin to establish a spatial rectangular coordinate system, and the critical angle on the xA'y plane is specified to be 2α, and the critical angle on the yA'z plane is specified to be 2β. The lengths of the projections of A'B' on the x, y, and z axes are set to be a, b, and c, respectively, and the formula is used: a = btan 2α; c = btan 2β; Where b = |y1|, we can get the values ​​of a and c; Compare ω1 with 2α, and ω2 with 2β to determine whether the display screen position needs to be adjusted. The comparison results include the following four situations: When ω1≤2α and ω2≤2β, it means that the initial position of the display screen is within the driver's optimal viewing angle area, and the display screen position does not need to be adjusted, and no adjustment instruction is generated; When ω1>2α and ω2≤2β, it means that the angle between the initial position of the display screen and the driver's face on the xAy plane exceeds the critical angle of the optimal viewing angle area, and it is necessary to calculate the distance between the two that needs to be adjusted along the x-axis direction and generate an adjustment instruction; When ω1≤2α and ω2>2β, it means that the angle between the initial position of the display screen and the driver's face on the yAz plane exceeds the critical angle of the optimal viewing angle area, and it is necessary to calculate the distance that needs to be adjusted along the z-axis direction and generate an adjustment instruction; When ω1>2α and ω2>2β, it means that the angle between the initial position of the display screen and the driver's face in the xAy plane and the yAz plane exceeds the critical angle of the optimal viewing angle area. It is necessary to calculate the distance that needs to be adjusted along the x and z axes and generate adjustment instructions.

10. The method for controlling a car display screen based on human-computer interaction according to claim 7, characterized in that: In step S3: if the judgment result is that the initial position of the display screen is outside the optimal viewing angle area, the formula is used: Δx=|x1―a|; Δz=|z1―c|; The distances Δx and Δz that the display screen needs to be adjusted are calculated, where Δx is the distance that the display screen needs to be adjusted along the x-axis direction, and Δz is the distance that the display screen needs to be adjusted along the z-axis direction.

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