Vehicle

Abstract

The invention discloses a vehicle, and belongs to the technical field of vehicles. The vehicle comprises a vehicle body, at least one anti-collision device, a detection module and a prompt device. The anti-collision device comprises a fixed contact piece and a movable contact piece, the fixed contact piece is fixed to the vehicle body, the movable contact piece is movably installed on the vehicle body, the movable contact piece and the fixed contact piece are oppositely arranged, and the movable contact piece can be pressed to move from a first position to a second position so as to make contact with the fixed contact piece. The detection module is electrically connected with the fixed contact piece, when the movable contact piece is in contact with the fixed contact piece, a circuit where the detection module is located is conducted, and the detection module outputs an early warning signal. And the prompting device is electrically connected with the detection module and is used for displaying early warning information corresponding to the early warning signal. By means of the technical scheme, whether obstacles exist around the vehicle or not can be accurately recognized, and therefore the vehicle is effectively prevented from being scratched.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle. Background Art

[0002] Vehicles are generally equipped with devices that identify and alert users to obstacles around the vehicle, so that users can know in time whether there are obstacles around the vehicle, thereby avoiding scratches on the vehicle.

[0003] In the related technology, ultrasonic radar or visual camera is installed on the vehicle, which detects obstacles within the preset range of the surroundings through ultrasonic radar or shoots the surrounding environment through visual camera, and then sends the detection results or shooting results to the vehicle's audio equipment or central control screen. Therefore, the driver can determine whether the vehicle can pass safely based on the warning sound emitted by the audio equipment or the display image of the central control screen, combined with the driver's subjective judgment. However, since the device only gives a prompt that there are obstacles within the preset range, the location of the obstacle needs to be judged by the driver subjectively later, so the accuracy is low and it is still easy to scratch the vehicle. Summary of the invention

[0004] In view of this, the present application provides a vehicle that can accurately identify whether there are obstacles around the vehicle, thereby more effectively preventing the vehicle from being scratched.

[0005] In one aspect, an embodiment of the present application provides a vehicle, the vehicle comprising a vehicle body, at least one anti-collision device, a detection module, and a prompt device;

[0006] The anti-collision device comprises a fixed contact and a movable contact, wherein the fixed contact is fixed to the vehicle body, and the movable contact is movably mounted on the vehicle body, the movable contact and the fixed contact are arranged opposite to each other, and the movable contact is pressed to move from a first position to a second position to contact with the fixed contact;

[0007] The detection module is electrically connected to the fixed contact, wherein when the movable contact contacts the fixed contact, the circuit where the detection module is located is turned on, and the detection module outputs a warning signal;

[0008] The prompt device is electrically connected to the detection module, and the prompt device is used to display the warning information corresponding to the warning signal.

[0009] Optionally, the moving contact member includes an elastic portion, a collision portion and a contact portion;

[0010] The elastic part extends along the length direction of the vehicle body, one end of the elastic part is connected to the vehicle body, and the other end is connected to the collision part;

[0011] The contact portion is connected to the collision portion and is arranged opposite to the fixed contact member;

[0012] When the collision portion is pressed, the collision portion pushes the contact portion so that the contact portion contacts the fixed contact piece.

[0013] Optionally, the movable contact member further comprises a connecting rod, two ends of which are respectively connected to the contact portion and the collision portion, and an extending direction of the connecting rod is parallel to a telescopic direction of the elastic member.

[0014] Optionally, the elastic part is connected to the outer side of the vehicle body, the collision part is arranged toward the outer side of the vehicle body, and the distance between the surface of the collision part facing the ground and the ground is equal to the distance between the end face of one end of the outer side of the vehicle body facing the ground and the ground.

[0015] Optionally, the vehicle body comprises a main body and a bottom plate, and the bottom plate is connected to a side of the main body facing the ground;

[0016] The elastic part is connected to the bottom plate, and the distance between the surface of the collision part facing the ground and the ground is equal to the distance between the surface of the bottom plate facing the ground and the ground.

[0017] Optionally, in the width direction of the vehicle body, the size of the collision portion is equal to the width of the vehicle body; or,

[0018] In the length direction of the vehicle body, the size of the collision portion is equal to the length of the vehicle body.

[0019] Optionally, the anti-collision device includes a plurality of the movable contacts, and the plurality of the movable contacts are arranged side by side along the width direction of the vehicle.

[0020] Optionally, the outer surface of the anti-collision device is coated with a waterproof layer.

[0021] Optionally, the vehicle further comprises a controller, and the controller is electrically connected to the detection module and the prompting device respectively.

[0022] Optionally, the prompting device is a display screen or a speaker.

[0023] The vehicle provided in the embodiment of the present application includes a vehicle body, at least one anti-collision device, a detection module and a prompt device. The anti-collision device includes a fixed contact and a moving contact, the fixed contact is fixed on the vehicle body, and the moving contact can be moved from a first position to a second position after being pressed to contact the fixed contact. That is to say, when the moving contact is squeezed by an obstacle, it can move toward the fixed contact and contact the fixed contact. Since the circuit where the detection module is located is in a conducting state when the moving contact contacts the fixed contact and the detection module can output a warning signal, when there is an obstacle, the user can display the warning information corresponding to the warning signal according to the prompt device to know the obstacle situation around the vehicle in time. Since the warning information is obtained based on the direct physical contact between the moving contact and the obstacle, and the driver can directly understand whether there are obstacles around the vehicle based on the warning information without combining the driver's subjective judgment, it can improve the efficiency and accuracy of identifying whether there are obstacles around the vehicle, thereby more effectively preventing the vehicle from being scratched. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of the present application;

[0026] Figure 2 is a structural schematic diagram of a vehicle provided in an embodiment of the present application;

[0027] Figure 3 is a schematic structural diagram of the bottom of a vehicle provided in an embodiment of the present application;

[0028] Figure 4 It is a block diagram of a controller, a detection module and a prompt device in a vehicle provided in an embodiment of the present application.

[0029] Reference numerals:

[0030] 100. Car body;

[0031] 101. Subject;

[0032] 102, bottom plate;

[0033] 200. Anti-collision device;

[0034] 201, fixed contact;

[0035] 202, moving contact;

[0036] 203, elastic part;

[0037] 204, collision department;

[0038] 205. Contact Department;

[0039] 206, connecting rod;

[0040] 300. Detection module;

[0041] 301. Detector;

[0042] 302, detection resistor;

[0043] 400, prompting device;

[0044] 500. Controller.

[0045] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] The directional nouns involved in the embodiments of the present application, such as "upper", "lower", "side", etc., are generally represented by Figure 1 The relative relationship of the orientation shown in the figure is used as a reference, and these orientation terms are used only to more clearly describe the relationship between structures, not to describe absolute orientations. When the product is placed in different postures, the orientation may change, for example, "upper" and "lower" may be interchangeable. Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as those generally understood by those skilled in the art.

[0048] In order to make the technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0049] Combination Figure 1 and Figure 2 As shown, an embodiment of the present application provides a vehicle, which includes a vehicle body 100, at least one anti-collision device 200, a detection module 300 and a prompt device 400.

[0050] The anti-collision device 200 includes a fixed contact 201 and a movable contact 202. The fixed contact 201 is fixed to the vehicle body 100, and the movable contact 202 is movably mounted on the vehicle body 100. The movable contact 202 and the fixed contact 201 are arranged opposite to each other. The movable contact 202 is pressed and can move from a first position to a second position to contact the fixed contact 201. That is, when the movable contact 202 is pressed by an obstacle, the movable contact 202 can move toward the fixed contact 201 and contact the fixed contact 201.

[0051] The detection module 300 is electrically connected to the fixed contact 201 , wherein when the movable contact 202 contacts the fixed contact 201 , the circuit where the detection module 300 is located is turned on, and the detection module 300 outputs a warning signal.

[0052] The prompt device 400 is electrically connected to the detection module 300, and is used to display the warning information corresponding to the warning signal. It is understandable that the user can timely understand the situation of obstacles around the vehicle according to the warning information displayed by the prompt device 400, so as to make operations such as parking and reversing to make the vehicle avoid obstacles, thereby preventing the vehicle from being scratched by obstacles.

[0053] It should be noted that since the warning information is obtained based on direct physical contact between the dynamic contact member 202 and the obstacle, and the driver can directly understand whether there are obstacles around the vehicle based on the warning information without the need for the driver's subjective judgment, it is possible to improve the efficiency and accuracy of identifying whether there are obstacles around the vehicle, thereby more effectively preventing the vehicle from being scratched.

[0054] The following is combined with Figures 1 to 4 The details and functions of the vehicle provided in the embodiment of the present application are described in more detail.

[0055] In some embodiments, the moving contact member 202 includes an elastic portion 203, a collision portion 204, and a contact portion 205. The elastic portion 203 extends along the length direction of the vehicle body 100, one end of the elastic portion 203 is connected to the vehicle body 100, and the other end is connected to the collision portion 204. The contact portion 205 is connected to the collision portion 204 and is arranged opposite to the fixed contact member 201. When the collision portion 204 is pressed, the collision portion 204 pushes the contact portion 205 so that the contact portion 205 contacts the fixed contact member 201.

[0056] like Figure 1As shown, in some embodiments, the detection module 300 includes a detector 301 and a detection resistor 302. The detector 301 is connected in parallel with the detection resistor 302, and the current input terminal of the detector 301 and the detection resistor 302 can be electrically connected to the positive electrode of the battery in the vehicle, or can be connected to other power sources on the vehicle that can supply power, and the current output terminal of the detector 301 and the detection resistor 302 can be electrically connected to the fixed contact 201. The current output terminal of the contact portion 205 is grounded. It should be noted that the current output terminal of the contact portion 205 can be connected to the vehicle body 100, or to the negative electrode of the battery. When the contact portion 205 is not in contact with the fixed contact 201, the circuit where the detector 301 and the detection resistor 302 are located is in a disconnected state. When the contact portion 205 is in contact with the fixed contact 201, the circuit where the detector 301 and the detection resistor 302 are located is in a conducting state. The detector 301 is used to detect the current, voltage or level flowing through the detection resistor 302 , so as to reflect whether the contact portion 205 is in contact with the fixed contact 201 through the detection result.

[0057] like Figure 1 As shown, in some embodiments, the detector 301 is a level detector 301, and when the contact portion 205 is connected to the fixed contact 201, the level detector 301 outputs a preset signal, wherein the preset signal is a high level signal with a level value greater than a preset level. Thus, it can be more accurately and quickly determined whether there are obstacles around the vehicle.

[0058] like Figure 1 As shown, in some embodiments, the elastic portion 203 can be a spring, so as to facilitate the resetting of the moving contact 202. It should be noted that the contact portion 205 and the fixed contact 201 can both be conductors, so that when the contact portion 205 contacts the fixed contact 201, the circuit where the detection module 300 is located can be turned on. It should be understood that when the collision portion 204 is squeezed by an obstacle and pushes the contact portion 205, the elastic portion 203 will be squeezed in the length direction of the vehicle body 100 and produce elastic deformation. When the squeezing force on the collision portion 204 is released, under the action of the elastic restoring force of the elastic portion 203, the elastic portion 203 can drive the collision portion 204 to move in a direction away from the contact portion 205, so that the contact portion 205 is separated from the fixed contact 201, thereby disconnecting the circuit where the detection module 300 is located, and at this time the detection module 300 cannot send a warning signal.

[0059] Combination Figure 1 and Figure 2As shown, in some embodiments, the fixed contact member 201 is installed at the front of the vehicle body 100, and the collision portion 204 is located in front of the vehicle body 100. When the collision portion 204 is not squeezed, there is a preset distance between the collision portion 204 and the fixed contact member 201. Therefore, when the vehicle moves forward, the collision portion 204 can contact the obstacle in advance and push the contact portion 205 to contact the fixed contact member 201, so that before the obstacle contacts the front side of the vehicle body 100, the prompt device 400 can display the warning information, so that the user can reverse or stop the vehicle in time to avoid the vehicle body 100 being scratched by the obstacle. In other words, when the vehicle moves forward, it can not only enable the user to know whether there are obstacles around the vehicle in time, but also ensure that the vehicle body 100 will not collide with the obstacle, thereby effectively avoiding the vehicle body 100 from being scratched by the obstacle.

[0060] like Figure 1 As shown, in some embodiments, the fixed contact member 201 is installed at the rear of the vehicle body 100, and the collision portion 204 is located behind the vehicle body 100. When the collision portion 204 is not squeezed, there is a preset distance between the collision portion 204 and the fixed contact member 201. Therefore, when the vehicle is reversing, the collision portion 204 can contact the obstacle in advance and push the contact portion 205 to contact the fixed contact member 201, so that before the obstacle contacts the front side of the vehicle body 100, the prompt device 400 can display the warning information, so that the user can avoid the vehicle body 100 from being scratched by the obstacle by timely moving forward or stopping. In other words, when the vehicle is reversing, it can not only enable the user to know whether there are obstacles around the vehicle in time, but also ensure that the vehicle body 100 will not collide with the obstacle, thereby effectively avoiding the vehicle body 100 from being scratched by the obstacle.

[0061] like Figure 1 As shown, in some embodiments, the movable contact member 202 further includes a connecting rod 206, the two ends of which are respectively connected to the contact portion 205 and the collision portion 204, and the extension direction of the connecting rod 206 is parallel to the extension direction of the elastic member. It should be noted that the connecting rod 206 can support and position the contact portion 205 and the collision portion 204 to prevent the collision portion 204 from shaking easily, for example, to prevent the collision portion 204 from being blown by the wind and moving toward the fixed contact member 201, thereby ensuring the effectiveness of the warning information.

[0062] Combination Figure 1 and Figure 2As shown, in some embodiments, the elastic part 203 is connected to the outer side of the vehicle body 100, the collision part 204 is arranged toward the outer side of the vehicle body 100, and the distance between the surface of the collision part 204 facing the ground and the ground is equal to the distance between the end surface of the outer side of the vehicle body 100 facing the ground and the ground. With such arrangement, the collision part 204 can be used to timely detect whether there are obstacles around the vehicle body 100 that are higher than the lowest point of the outer side of the vehicle body 100. In other words, if the prompt device 400 does not display the warning information, it indicates that there are no obstacles around the vehicle that are higher than the lowest point of the outer side of the vehicle body 100, and the outer side of the vehicle body 100 will not be scratched.

[0063] In some embodiments, when the elastic part 203 is connected to the outer side of the vehicle body 100, when the elastic part 203 is in the extreme position of the compression state, the collision part 204 has a preset distance from the outer side of the vehicle. It should be noted that, since the elastic part 203 is compressed to the limit by the collision part 204, there is a preset distance between the collision part 204 and the contact part 205, so that the collision part 204 and the contact part 205 can be avoided from contacting each other, so as to ensure that when the prompt device 400 displays the warning information, the outer side of the vehicle still does not contact the collision part 204, and further ensure that the outer side of the vehicle can maintain a certain distance from the obstacle, so as to ensure that the outer side of the vehicle will not be scratched by the obstacle, improve the safety of the vehicle during driving, and ensure the aesthetic appearance of the vehicle.

[0064] In some embodiments, the end surface of the outer side surface of the vehicle body 100 facing the ground is the end surface of the front bumper or the rear bumper of the vehicle facing the ground.

[0065] Combination Figure 1 and Figure 2As shown, in some embodiments, the vehicle body 100 includes a main body 101 and a bottom plate 102, and the bottom plate 102 is connected to the side of the main body 101 facing the ground. The elastic part 203 is connected to the bottom plate 102, and the distance between the surface of the collision part 204 facing the ground and the ground is equal to the distance between the surface of the bottom plate 102 facing the ground and the ground. It should be noted that if the height of the obstacle is lower than the lowest point of the vehicle body 100 on the side but higher than the bottom plate 102, the vehicle bottom plate 102 may still have the risk of scratching the obstacle. Since the lowest point of the collision part 204 is equal to the lowest point of the bottom plate 102, the collision part 204 can be used to timely detect whether there is an obstacle at the bottom of the vehicle body 100 that is lower than the lowest point of the outer side of the vehicle body 100 but higher than the lowest position of the bottom plate 102. In other words, if the prompt device 400 does not display the warning information, it means that there is no obstacle at the bottom of the vehicle body 100 that is higher than the lowest point of the bottom plate 102, and there is no risk of scratching the bottom plate 102. Such a configuration can improve the comprehensive and accurate detection of obstacles around the vehicle body 100 to ensure that the vehicle can pass safely. It can be understood that the bottom plate 102 can be, for example, a lower guard plate of the vehicle.

[0066] In some embodiments, a card slot is provided on the side of the bottom plate 102 facing the ground point, the card slot opening faces the ground, and the card slot extends along the moving direction of the collision part 204. The connecting rod 206 is located in the card slot. It should be noted that the card slot can play a certain limiting role on the connecting rod 206. When the collision part 204 is compressed, it can ensure that the push rod can push the contact part 205 along the moving direction of the collision part 204, so as to avoid the contact part 205 from being offset in the process of moving toward the fixed contact 201, thereby ensuring that the contact part 205 can be aligned with the fixed contact 201, and then ensuring that the contact part 205 can contact with the fixed contact 201, and ensuring the effectiveness and accuracy of the collision part 204 in detecting obstacles.

[0067] In some embodiments, in the width direction of the vehicle body 100, the size of the collision portion 204 is equal to the width of the vehicle body 100. Alternatively, in the length direction of the vehicle body 100, the size of the collision portion 204 is equal to the length of the vehicle body 100. This ensures that the collision portion 204 can detect obstacles at any position in the length direction of the vehicle body 100 or obstacles at any position in the width direction of the vehicle body 100, so as to improve the accuracy of obstacle detection around the vehicle body 100.

[0068] like Figure 2 As shown, in some embodiments, the anti-collision device 200 includes a plurality of movable contact members 202, and the plurality of movable contact members 202 are arranged side by side along the width direction of the vehicle, thereby ensuring that the collision part 204 can detect any position in the width direction of the vehicle body 100, so as to improve the accuracy of detecting obstacles in front of or behind the vehicle body 100.

[0069] In some embodiments, the outer surface of the anti-collision device 200 is coated with a waterproof layer. This arrangement can improve the waterproof performance of the anti-collision device 200, and prevent the anti-collision device 200 from being wetted by liquids such as rainwater, thereby reducing the accuracy of the detection points of the anti-collision device 200, or causing the anti-collision device 200 to be unable to be used normally. It should be noted that the outer surface of each component included in the anti-collision device 200 is coated with a waterproof layer, thereby improving the waterproof performance of the anti-collision device 200.

[0070] like Figure 4 As shown, in some embodiments, the vehicle further includes a controller 500, and the controller 500 is electrically connected to the detection module 300 and the prompt device 400, respectively. In this way, the controller 500 and the detection module 300 can transmit signals or instructions to each other, and the controller 500 and the prompt device 400 can transmit signals or instructions to each other. The controller 500 is used to receive the warning signal sent by the detection module 300, and determine the warning information corresponding to the warning signal. Furthermore, the controller 500 is also used to send the warning information to the prompt device 400.

[0071] In some embodiments, the prompt device 400 is a display screen or a speaker. It should be noted that when the prompt device 400 does not display a display screen, the warning information is a warning text corresponding to the warning signal, such as displaying a preset sentence such as "Please note that there is an obstacle in front of the vehicle" on the display screen. When the prompt device 400 is a speaker, the warning information is a warning voice corresponding to the warning signal, such as a speaker emitting a preset voice prompt such as "Please note that there is an obstacle in front of the vehicle". In this way, the user can promptly understand whether there are obstacles around the vehicle.

[0072] As can be seen from the above, the vehicle provided in the embodiment of the present application can accurately detect relatively low-height obstacles on the outside and bottom of the vehicle body 100 by arranging the anti-collision device 200 on the outside and bottom of the vehicle body 100, and timely display warning information to prompt the user, so that the user can timely adjust the running direction or running status of the vehicle to avoid obstacles in time, prevent the vehicle from being scratched, improve the safety of the vehicle's driving, and ensure the aesthetics of the vehicle's exterior.

[0073] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0074] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A vehicle, characterized in that: The vehicle comprises a vehicle body (100), at least one anti-collision device (200), a detection module (300) and a prompting device (400); The anti-collision device (200) comprises a fixed contact (201) and a movable contact (202), wherein the fixed contact (201) is fixed on the vehicle body (100), and the movable contact (202) is movably mounted on the vehicle body (100), the movable contact (202) and the fixed contact (201) are arranged opposite to each other, and the movable contact (202) is pressurized to move from a first position to a second position so as to contact the fixed contact (201); The detection module (300) is electrically connected to the fixed contact (201), wherein when the movable contact (202) contacts the fixed contact (201), the circuit where the detection module (300) is located is turned on, and the detection module (300) outputs a warning signal; The prompt device (400) is electrically connected to the detection module (300), and the prompt device (400) is used to display the warning information corresponding to the warning signal.

2. The vehicle according to claim 1, characterized in that The movable contact member (202) comprises an elastic portion (203), a collision portion (204) and a contact portion (205); The elastic part (203) extends along the length direction of the vehicle body (100), one end of the elastic part (203) is connected to the vehicle body (100), and the other end is connected to the collision part (204); The contact portion (205) is connected to the collision portion (204) and is arranged opposite to the fixed contact member (201); When the collision portion (204) is pressed, the collision portion (204) pushes the contact portion (205) so that the contact portion (205) contacts the fixed contact member (201).

3. The vehicle according to claim 2, characterized in that The movable contact member (202) further comprises a connecting rod (206), the two ends of which are respectively connected to the contact portion (205) and the collision portion (204), and the extending direction of the connecting rod (206) is parallel to the extension direction of the elastic member.

4. The vehicle according to claim 2, characterized in that The elastic portion (203) is connected to the outer side surface of the vehicle body (100), the collision portion (204) is arranged toward the outer side surface of the vehicle body (100), and the distance between the surface of the collision portion (204) facing the ground and the ground is equal to the distance between the end surface of one end of the outer side surface of the vehicle body (100) facing the ground and the ground.

5. The vehicle according to claim 2, characterized in that The vehicle body (100) comprises a main body (101) and a bottom plate (102), wherein the bottom plate (102) is connected to a side of the main body (101) facing the ground; The elastic part (203) is connected to the bottom plate (102), and the distance between the surface of the collision part (204) facing the ground and the ground is equal to the distance between the surface of the bottom plate (102) facing the ground and the ground.

6. The vehicle according to claim 2, characterized in that In the width direction of the vehicle body (100), the size of the collision portion (204) is equal to the width of the vehicle body (100); or, In the length direction of the vehicle body (100), the size of the collision portion (204) is equal to the length of the vehicle body (100).

7. The vehicle according to claim 2, characterized in that The anti-collision device (200) comprises a plurality of movable contacts (202), and the plurality of movable contacts (202) are arranged side by side along the width direction of the vehicle.

8. The vehicle according to claim 1, characterized in that The outer surface of the anti-collision device (200) is coated with a waterproof layer.

9. The vehicle according to claim 1, characterized in that The vehicle further comprises a controller (500), wherein the controller (500) is electrically connected to the detection module (300) and the prompting device (400) respectively.

10. The vehicle according to claim 1, characterized in that The prompting device (400) is a display screen or a speaker.

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