Auxiliary reference device for front wheel position

Abstract

The utility model relates to an auxiliary reference device for the position of a front wheel, which comprises a first reference chassis and a second reference chassis which are placed on a center console surface of a vehicle, and the bottom surfaces of the first reference chassis and the second reference chassis are connected with the center console surface of the vehicle through adhesive layers. Light source bodies capable of emitting light are detachably connected to the first reference chassis and the second reference chassis; during use in the daytime, only the first reference chassis and the second reference chassis are placed on the center console surface, and light source bodies are not placed on the first reference chassis and the second reference chassis, so that a driver can perceive the transverse position of front wheels of a vehicle on a road by observing the first reference chassis and the second reference chassis during driving; whether front wheel tires and a vehicle body of the vehicle can pass through road edges, traffic marking lines, obstacles or nearby vehicles or not is pre-judged, so that driving is convenient, and the driving efficiency is improved.

Description

Technical field:

[0002] The utility model relates to a front wheel position auxiliary reference device, which is particularly used on motor vehicles (such as cars, vans, trucks, etc.). Background technology:

[0004] When people drive a vehicle, they usually estimate the approximate lateral position of the front wheels based on experience in order to avoid potholes and obstacles ahead and control the lateral distance between the vehicle and road traffic markings, road edges, vehicles on the side or people. However, it is not easy to be accurate based on experience alone, and it is not easy to master in a short period of time. In addition, it is easy to make misjudgments in some emergency situations, resulting in adverse consequences. Therefore, people have further developed driving assistance devices.

[0005] For example, the Chinese utility model patent with patent number 202120785919.1 discloses a car assisted driving device, which is arranged on the center console of the car near the windshield, including a light source, a light-transmitting sheet one, a light-transmitting sheet two, an upper cover, a box body and a moving mechanism. The upper cover is buckled on the box body to form a closed cavity. The light source is arranged at the bottom of the box body. The light-transmitting sheet one and the light-transmitting sheet two are arranged in the cavity with left and right intervals. Each of the two light-transmitting sheets is equipped with a moving mechanism for pushing the corresponding light-transmitting sheets to move left and right in the cavity. A transparent window is provided on the upper cover for light emission from the light-transmitting sheet one and the light-transmitting sheet two. The device is provided with a moving mechanism that can adjust the distance between the two light sources.

[0006] The above-mentioned existing device is provided with a moving mechanism, which can adjust the distance between the two light sources. However, since the moving mechanism is integrated with the light source and the box body, the device has a complex structure and a large size (the distance between the left and right light-transmitting sheets alone is about 300 mm), resulting in at least the following disadvantages:

[0007] 1. Due to the large size and volume of the above-mentioned existing devices, it is not convenient to install and use. The center console of a general car model is at an angle of about 40 degrees to the front windshield. The center console of the car is close to the windshield and is also provided with an air conditioning defogger outlet. The space at this location is narrow, and the large size and volume of the device is not convenient to have a suitable installation location, and it is easy to block the defogger outlet.

[0008] 2. Since the above-mentioned existing device is large in size and volume, it cannot be installed near the bottom of the acute-angled front windshield, and the offset proportional coefficient is small, which will increase the deviation of wheel position judgment. (See the discussion in Specific Implementation 1.2.1).

[0009] 3. The existing device is large in size and volume, occupies the center console space, and affects the driver's vision.

[0010] The technical problem to be solved by the utility model is to provide a front wheel position auxiliary reference device with a simple structure, compact size, easy installation and use, high wheel position judgment accuracy, less center console space occupation and no influence on the driver's line of sight. Summary of the invention:

[0012] In view of the above-mentioned problems existing in the prior art, the purpose of the present utility model is to provide a front wheel position auxiliary reference device, which has a simple structure, compact size, and is easy to install and use. It can assist in determining the position of the front wheels, and occupies less space on the center console and does not affect the driving line of sight.

[0013] The utility model is implemented by the following scheme:

[0014] The utility model provides an auxiliary reference device for the position of a front wheel, characterized in that it comprises a first reference chassis and a second reference chassis placed on a vehicle center console, the bottom surfaces of the first reference chassis and the second reference chassis being connected to the vehicle center console via an adhesive layer, and a light source capable of emitting light being detachably connected to the first reference chassis and the second reference chassis.

[0015] Furthermore, the light source body is a light source box, and the bottom surface of the light source box is detachably connected to the upper surfaces of the first reference chassis and the second reference chassis.

[0016] Furthermore, the bottom surface of the light source box is detachably connected to the upper surfaces of the first reference chassis and the second reference chassis through magnet adsorption.

[0017] Furthermore, the bottom surface of the light source box is detachably connected to the upper surfaces of the first reference chassis and the second reference chassis by plugging the pin shaft into the pin hole.

[0018] Furthermore, the first reference chassis, the second reference chassis and the light source box form a cylinder.

[0019] Furthermore, the light source body comprises an outer shell and an LED lamp arranged in the outer shell, and the outer shell is made of translucent frosted plastic.

[0020] Furthermore, the light source is powered by a vehicle USB port through a line, or by a battery located in the box.

[0021] Furthermore, the outer shell comprises a face mask and a shell bottom, and the face mask and the shell bottom are fixedly connected and packaged.

[0022] Furthermore, the above-mentioned LED lamp is an LED lamp board or a SMD LED.

[0023] The method for using the front wheel position auxiliary reference device of the utility model is as follows: when used during the day, only the first reference chassis and the second reference chassis are placed on the center console, and no light source is placed on the first reference chassis and the second reference chassis. The driver can perceive the lateral position of the front wheels of the vehicle in the road by observing the first reference chassis and the second reference chassis during driving, and predict whether the front wheel tires and the body of the vehicle can pass through the curb, traffic markings, obstacles or the vehicles on the side, thereby facilitating driving and improving driving efficiency; when used at night, the light source is placed on the first reference chassis and the second reference chassis. When driving, the driver can perceive the lateral position of the front wheels of the vehicle in the road by observing the first reference chassis and the second reference chassis and the light sources thereon, and predict whether the front wheel tires and the body of the vehicle can pass through the curb, traffic markings, obstacles or the vehicles on the side, thereby facilitating driving during the day and at night and improving driving efficiency.

[0024] Advantages of the front wheel position auxiliary reference device of the utility model:

[0025] 1. The first reference chassis and the second reference chassis are detachably connected to the light source body, which can be quickly separated and reset. They can be put away during the day without taking up the space of the control panel, blocking the sight, and are simple and beautiful. In addition, the electronic components of the device can be prevented from being exposed to sunlight for a long time, resulting in a reduction in service life.

[0026] 2. No need for bulky boxes and moving mechanisms, greatly reducing the size and volume, and adapting to the narrow installation space of about 40 degrees at the junction of the front windshield and the center console;

[0027] 3. The light source can adopt a low-light illumination light source, and the outer shell is made of translucent frosted plastic, so as not to affect the driving line of sight and improve the safety of the reference device. Description of the drawings:

[0029] The utility model is further described below in conjunction with the accompanying drawings;

[0030] Figure 1 It is a three-dimensional schematic diagram of the sight line when referencing the calibration of the utility model;

[0031] Figure 2 It is a three-dimensional schematic diagram of the equivalent reference points on the center console during reference calibration of the utility model;

[0032] Figure 3 It is a top view of the calculation principle of the offset proportional coefficient when the utility model is used;

[0033] Figure 4 It is a three-dimensional diagram of the utility model, wherein the light source body is powered by a vehicle-mounted USB;

[0034] Figure 5It is a cross-sectional view of the first embodiment of the detachable connection between the reference chassis and the light source body of the utility model, wherein the detachable connection adopts the principle of attraction between magnets with different poles (separated state);

[0035] Figure 6 It is a cross-sectional view of the first embodiment of the detachable connection between the reference chassis and the light source body of the utility model, wherein the detachable connection adopts the principle of attraction between magnets with different poles (reset state);

[0036] Figure 7 It is a cross-sectional view of the second embodiment of the detachable connection between the reference chassis and the light source body of the utility model, wherein the detachable connection adopts the pin shaft pin hole plug-in positioning (separated state);

[0037] Figure 8 It is a cross-sectional view of the second embodiment of the detachable connection between the reference chassis and the light source body of the utility model, wherein the detachable connection adopts the pin shaft pin hole plug-in positioning (reset state);

[0038] Fig. 9 It is a basic principle diagram of the light source circuit of the utility model. Specific implementation method:

[0040] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0041] The auxiliary reference device for the position of the front wheel A2 of the utility model includes a first reference chassis 1 and a second reference chassis 2 placed on the center console of a vehicle A1 (such as a car, a van, a truck, etc.), and the bottom surfaces of the first reference chassis 1 and the second reference chassis 2 are connected to the center console of the vehicle (i.e., the table between the front windshield and the steering wheel of the vehicle) 3 through an adhesive layer 8 (glue or double-sided tape), and the first reference chassis 1 and the second reference chassis 2 are detachably connected with a light source 4 that can emit light; of course, the bottom surfaces of the first reference chassis 1 and the second reference chassis 2 can also be connected to the center console of the vehicle by means of threads or snap-on connections. Since this is an existing customary technology, it will not be described here.

[0042] In one embodiment, the light source body 4 is a light source box, and the bottom surface of the light source box is detachably connected to the upper surfaces of the first reference chassis and the second reference chassis (the light source body adopts a detachable connection design, and the light source body and the power supply connector cable can be stored during the day. In addition to the advantages of small size, easy installation and use, less space occupied by the center console, and no impact on the driving line of sight, it can also prevent electronic components from being exposed to sunlight for a long time, resulting in a decrease in service life. There are many ways to detachably connect, such as the bottom surface of the light source box and the upper surfaces of the first reference chassis and the second reference chassis are detachably connected by adsorption of a magnet 5 (such as Figure 5 As shown), or the bottom surface of the light source box and the upper surface of the first reference chassis and the second reference chassis are detachably connected by plugging the pin shaft 6 and the pin hole 7 (as shown Figure 7 As shown), the pin shaft 6 and the pin hole 7 can be connected by a transition fit or a clearance fit.

[0043] The first reference chassis, the second reference chassis and the light source box may form a cylindrical or stepped shape.

[0044] In order to prevent the light output from being dazzling and affecting driving, the light source body 4 includes an outer shell and an LED lamp 402 arranged in the outer shell. The outer shell is made of translucent frosted plastic. The outer shell made of translucent frosted plastic makes the light emitted by the LED lamp 402 non-dazzling, thereby ensuring driving safety. Specifically, the outer shell can be formed by a mask 401 and a shell bottom 403 fixedly connected and packaged.

[0045] In order to power the LED lamp 402, the above-mentioned light source is powered by the vehicle USB interface through the line, or by a battery located in the box; the light source can adopt a thin sheet LED light panel or an LED patch light source, and the first reference chassis and the second reference chassis can adopt a thin sheet structure to further reduce the size and volume of the auxiliary reference device.

[0046] In order to improve the safety of the reference device, the first reference chassis 1 and the second reference chassis 2 are made of flame-retardant or non-combustible materials, and the light source can be designed with low power (such as LED lamp power, 0.1-0.5 watts), which is not hot or scalding, safe and has no electrical fire risk; and can greatly reduce the loss of the vehicle power supply;

[0047] To improve the reliability of the reference device, it is powered by a vehicle-mounted USB power supply, which is long-term and stable. A low-power, low-current design is adopted to extend the service life of components. The light source can adopt a dual-lamp redundant design (that is, each light source has two LED lights). Because the light source is detachable, it can be stored away during the day to avoid the impact of exposure on the function and life of the light source.

[0048] The method for using the front wheel position auxiliary reference device of the utility model is as follows: when used during the day, only the first reference chassis and the second reference chassis are placed on the center console, and no light source is placed on the first reference chassis and the second reference chassis. The driver can perceive the lateral position of the front wheels of the vehicle in the road by observing the first reference chassis and the second reference chassis during driving, and predict whether the front wheel tires and the body of the vehicle can pass through the curb, traffic markings, obstacles or adjacent vehicles on the road surface, thereby facilitating driving and improving driving efficiency; when used at night, the light source is placed on the first reference chassis and the second reference chassis. The driver can perceive the lateral position of the front wheels of the vehicle in the road by observing the first reference chassis and the second reference chassis and the light sources thereon, and predict whether the front wheel tires and the body of the vehicle can pass through the curb, traffic markings, obstacles or adjacent vehicles on the road surface, thereby facilitating driving during the day and at night, and improving driving efficiency.

[0049] Due to the adoption of the above technical solution, the beneficial effects of the front wheel position auxiliary reference device of the utility model are as follows:

[0050] 1. Simple structure, compact size, easy installation and use, and does not block the air outlet of the air conditioner defogger;

[0051] 2. The device is small in size and can be installed near the bottom of the front windshield. The offset proportional coefficient is increased, and the accuracy of wheel position judgment is improved;

[0052] 3. The device is small in size, and the light source and power supply cables can be stored, which does not take up the center console space and does not block the driver's sight;

[0053] 4. Furthermore, since the light source and the power supply cable can be stored, the electronic components of the device can be prevented from being exposed to sunlight for a long time, resulting in problems such as reduced service life.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

[0055] 1. In addition, the principle that the utility model can be used as a driving reference is explained as follows:

[0056] 1.1, wheel lateral position reference calibration (please refer to Figure 1 , Figure 2 )

[0057] 1.1.1. The left and right wheels of the vehicle are respectively on the center of the road marking (or other straight marking lines with a width of about 150-200mm).

[0058] 1.1.2. The driver adjusts his seat and sits in a normal posture, and his eyes pass over the front of the hood and intersect with the road markings, forming sight lines S1 and S2 on the left and right sides respectively, with intersection points O1 and O2.

[0059] 1.1.3, the horizontal projections of the sight lines S1, S2 in the center console 202 area are lines S11, S22 (reference Figure 2 ), intersecting with the lower end line of the front windshield 201 respectively, to form two intersection points 1, 2, which are defined herein as: the equivalent reference points of points O1, O2 on the trajectory line directly in front of the wheel at the front end of the center console 202; at the place closest to these two intersection points, the reference chassis of the device is installed, which are called the first reference chassis 1 and the second reference chassis 2, thereby completing the reference calibration of the lateral position of the front wheel on the center console.

[0060] 1.2, Proof of lateral distance ratio (please refer to Figure 3 )

[0061] Figure 3 In the figure, A3 is the trajectory line in front of the right front wheel A2 of the vehicle A1; A4 is the line of sight S2 formed by the driver's eyes A5 passing over the right front end of the hood and intersecting with the right front trajectory line A3, and is projected on the horizontal plane; the first reference chassis 1 and the second reference chassis 2 are installed at the front end of the vehicle center console near the front windshield after calibration.

[0062] 1.2.1, when a point X appears outside point O2 in front of the road (here only the right side of the car is taken as an example, the left side is not repeated), the lateral distance between point X and point O2 is L0; similarly, the horizontal projection of the line of sight of point X in the center console area intersects with the lower end line of the front windshield at point X1 (for the convenience of description, it is defined as the display point), and the lateral distance between X1 and point 2 is L1. According to the principle of triangle similarity,

[0063] L1 / L0=(O-2) / (O-O2)=h1 / h2=K......................(1)

[0064] In formula (1), h1 is the horizontal distance between the eye and the lower end of the front windshield, h2 is the longitudinal distance between the eye and point O2, and K is defined as the offset proportional coefficient;

[0065] 1.2.2, it can be seen from formula (1) that the K value is related to the structural parameters of the car, the seat height of the person, and the distance between the eyes (or seat) and the front windshield; the K value varies with different combinations of cars and drivers.

[0066] 1.2.3, but for a specific car and driver combination, the body, seat height and seat distance are fixed, and K is a constant.

[0067] Due to the rapid popularization of cars in recent years, the concept of dedicated cars for dedicated persons has been basically realized, so the K value remains unchanged; it is worth mentioning that due to the popularity of dedicated cars for dedicated persons, the position of this reference device is fixed after installation and does not need to be adjusted, while the adjustable auxiliary driving device of the existing patented technology has gradually become redundant in function, is bulky in size, and occupies a large central control area. The utility model eliminates the existing light-transmitting sheet moving mechanism, greatly reducing the size and volume.

[0068] 1.2.4, K is a constant, so the offset distance L1 of the display point on the center console relative to the reference point and the lateral offset distance L0 of the outer point in front of the road relative to the wheel position line have a good linear proportional relationship.

[0069] Therefore, the offset distance of the display point on the center console can be used to predict whether the vehicle's front wheel tires and body can pass through curbs, traffic markings, obstacles or nearby vehicles on the road, thereby facilitating use during the day and night and improving driving efficiency.

[0070] 1.3. Road test results for a specific vehicle type and personnel combination

[0071] 1.3.1, measured results of offset proportionality coefficient K:

[0072] The results on the right are as follows: h1=0.90m, h2=6.70m, K=h1 / h2=0.134,

[0073] The results on the left are as follows: h1=0.90 meters, h2=6.40 meters, K=h1 / h2=0.141,

[0074] The test results show that there is a slight difference in the left and right offset ratio coefficients. After analysis, it is mainly because the driver's seat is located to the left, so the left and right sight lines have different angles with the horizontal. The impact on L1 (the offset distance of the display point relative to the reference point) is calculated as follows:

[0075] According to formula (1), L1 / L0=(O-2) / (O-O2)=h1 / h2=K, so L1=K*L0

[0076] Take L0=350mm, right side L1=K*L0=0.134*350=46.9mm,

[0077] Left side L1=K*L0=0.141*350=49.35mm,

[0078] The difference between the left and right sides is only 2.5 mm, and the deviation ratio is 4.9%, which does not affect driving judgment. Therefore, it can be assumed that the left and right offset ratio coefficients are similar.

[0079] 1.3.2. Observe the visual effect of the display point offset on the center console (only the right side is taken as an example, and the left side is not repeated).

[0080] Experimental method: Adjust the vehicle position while driving so that the front wheels are at 1000mm, 450mm, 350mm, and 0mm (pressing the line) respectively relative to the road marking line (center distance), and observe and measure the center console L1 (the offset distance of the display point relative to the reference point).

[0081] The measured results and data are as follows:

[0082] When L0=1000mm, L1=136mm,

[0083] When L0=450mm, L1=58mm,

[0084] When L0=350mm, L1=45mm,

[0085] When L0=0mm, L1=0mm,

[0086] The measured results show:

[0087] 1) The measured data is basically consistent with the theoretical calculation, and the slight deviation is due to the visual deviation of the reading;

[0088] 2) The change of actual distance on the road will result in a clearly discernible change in the corresponding visual distance offset on the center console, especially when the wheel is close to the marking line (L0=350mm), the distance is still clearly discernible on the center console, which is also the practical and feasible principle basis of the auxiliary reference device;

[0089] 3) For ordinary drivers, they are more concerned about predicting the lateral proximity between the front wheel and the object, such as far, near, and touching the line (or scraping), so as to make a decision to correct the control.

[0090] In these three states, the front wheel position auxiliary reference device can give clear and effective indications.

[0091] To sum up, the device of the utility model is able to predict in theory and practice whether the front wheel tires and the vehicle body can pass through the curb, traffic markings, obstacles or adjacent vehicles on the road surface, thereby facilitating use during the day and at night and improving driving efficiency. This has practical significance for the majority of drivers to quickly master and improve driving skills and reduce the occurrence of traffic accidents.

[0092] 2. Example: Product structure diagram

[0093] 2.1, Figure 4It is a three-dimensional diagram of the front wheel position auxiliary reference device of the utility model, wherein the light source body is powered by a vehicle-mounted USB; the product includes a first reference chassis 1 and a second reference chassis 2, an adhesive layer 8, a light source body 4, a USB connector and a cable 9; the bottom surfaces of the first reference chassis 1 and the second reference chassis 2 are connected to the vehicle center console surface 3 through the adhesive layer 8, the light source body 4 is detachably connected to the first reference chassis 1 and the second reference chassis 2, and the built-in LED light board of the light source body is powered by the USB connector and the cable 9 through the plug-in connector.

[0094] Since there is no need for a complicated adjustment mechanism, the auxiliary reference device is separately arranged on the left and right, and a detachable connection design is adopted for the light source body. The light source body and power supply connector cables can be stored during the day. Therefore, the front wheel position auxiliary reference device of the utility model has the advantages of simple structure, compact size, easy installation and use, higher wheel position judgment accuracy, less space occupied on the center console, and no influence on the driving line of sight.

[0095] 2.2, Figure 5 , Figure 6 It is a cross-sectional view of the first embodiment of the detachable connection between the reference chassis and the light source body of the utility model, wherein the detachable connection utilizes the principle of attraction between magnets of opposite poles.

[0096] Figure 5 Refer to the state where the chassis and light source are separated. Figure 6 To refer to the reset state of the chassis and the center of the light source body,

[0097] The light source body includes an outer shell and an LED lamp 402 (which can be a SMD LED) located inside the outer shell. The outer shell is composed of a mask 401 and a shell bottom 403. The LED lamp 402 is glued to the shell bottom 403. The mask 401 and the shell bottom 403 are glued and encapsulated (a snap-on or threaded connection is also optional). The outer shell is made of translucent frosted plastic, so that the light emitted by the LED lamp 402 becomes a non-dazzling light, thereby ensuring driving safety. There is an opening on the mask 401 for the power cord of the LED light board to pass through. The shell bottom 403 is fixedly connected to the magnet by interference fit or adhesive bonding. The light source body provides lighting indication for the reference chassis at night. At the same time, because it is aligned with the center of the reference chassis, the light source body itself also has a night reference function.

[0098] Magnets 5 are embedded on the upper surfaces of the first reference chassis 1 and the second reference chassis 2. The magnets 5 are fixed to the reference chassis by interference fit or adhesive bonding. After the first reference chassis 1 and the second reference chassis 2 are calibrated, installed and fixed on the center console 3, they serve as equivalent reference points for the lateral positions of the front wheels at the front end of the center console 3 and have a driving reference indication function for the front wheel positions. The first reference chassis 1 and the second reference chassis 2 are made of plastic or metal and are designed in a thin sheet shape to reduce the thickness and facilitate installation.

[0099] The magnet on the light source body and the magnet on the reference chassis have opposite polarities, so that the light source body and the reference chassis can be centrally aligned and quickly attracted and reset, and the light source body can also be easily separated and stored.

[0100] Figure 7 and Figure 8 It is a cross-sectional view of the second embodiment of the utility model in which the reference chassis and the light source body are detachably connected, respectively showing the separated state and the reset state; Figure 7 and Figure 8 Examples and Figure 5 and Figure 6 The difference between the embodiments of the present invention lies in that, in contrast to the detachable connection between the reference chassis and the light source body, this embodiment adopts a detachable plug-in connection between the pin shaft 6 and the pin hole 7.

Claims

1. A front wheel position auxiliary reference device, characterized in that: It includes a first reference chassis and a second reference chassis placed on a vehicle center console. The bottom surfaces of the first reference chassis and the second reference chassis are connected to the vehicle center console via an adhesive layer. The first reference chassis and the second reference chassis are detachably connected with a light source capable of emitting light.

2. The front wheel position auxiliary reference device according to claim 1, characterized in that: The light source body is a light source box, and the bottom surface of the light source box is detachably connected to the upper surfaces of the first reference chassis and the second reference chassis.

3. The front wheel position auxiliary reference device according to claim 2, characterized in that: The bottom surface of the light source box is detachably connected to the upper surfaces of the first reference chassis and the second reference chassis through magnet adsorption.

4. The front wheel position auxiliary reference device according to claim 2, characterized in that: The bottom surface of the light source box is detachably connected to the upper surfaces of the first reference chassis and the second reference chassis by plugging the pin shaft into the pin hole.

5. The front wheel position auxiliary reference device according to claim 2, 3 or 4, characterized in that: The first reference chassis, the second reference chassis and the light source box form a cylinder.

6. The front wheel position auxiliary reference device according to claim 2, 3 or 4, characterized in that: The light source body comprises an outer shell and an LED lamp arranged in the outer shell, and the outer shell is made of translucent frosted plastic.

7. The front wheel position auxiliary reference device according to claim 6, characterized in that: The light source is powered by a vehicle USB port through a line, or by a storage battery in the box.

8. The front wheel position auxiliary reference device according to claim 6, characterized in that: The outer shell comprises a face mask and a shell bottom, and the face mask and the shell bottom are fixedly connected and packaged.

9. The front wheel position auxiliary reference device according to claim 6, characterized in that: The LED lamp is an LED lamp board or a SMD LED.

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