Camera mirror system with infrared LEDs for docking in dark places

Abstract

A method for illuminating a commercial vehicle in low light conditions includes providing a camera monitor system including a diffused infrared LED having a first beam angle and a focused infrared LED having a second beam angle less than the first beam angle, the method including operating the diffused infrared LED under a first condition to provide diffused infrared light to the sides of the commercial vehicle, and operating the focused infrared LED under a second condition different from the first condition to provide focused infrared light to the ends of the commercial vehicle.

Description

[Technical Field]

[0001] This disclosure relates to a camera monitoring system (CMS) for use in commercial trucks or similar vehicles, and more particularly to a CMS infrared LED for improving nighttime visibility. [Background technology]

[0002] Mirror replacement systems and camera systems that complement mirror views are used in commercial vehicles to enhance the driver's ability to see their surroundings. Camera monitoring systems (CMS) utilize one or more cameras to provide the driver with an enhanced field of view. In some examples, CMSs cover a larger field of view than conventional mirrors or include fields of view that cannot be fully obtained through conventional mirrors.

[0003] A typical CMS (Camera Management System) has camera arms positioned on both the left and right sides of the vehicle to provide Class II and Class IV views. Displays are provided on the A-pillars on both the driver's and passenger's sides, simulating a conventional mirror by showing the field of view of the camera arm on that side.

[0004] Driving commercial vehicles at night is difficult due to poor visibility. To improve nighttime visibility, the use of infrared light-emitting diodes (infrared LEDs) in CMS systems has been proposed. Infrared LEDs generate heat that must be managed during use. Infrared LEDs also have various other limitations that restrict their usefulness during typical driving operations. [Overview of the project]

[0005] In one exemplary embodiment, a method for illuminating a commercial vehicle under low-light conditions includes providing a camera monitoring system comprising a diffuse infrared LED having a first beam angle and a focused infrared LED having a second beam angle smaller than the first beam angle. The method further includes the step of operating the diffuse infrared LED under first conditions to provide diffuse infrared light to the side of the commercial vehicle. The method further includes the step of operating the focused infrared LED under second conditions different from the first conditions to provide focused infrared light to the edge of the commercial vehicle.

[0006] In any further embodiment described above, the diffuse and focused infrared LEDs each have at least one of a primary optical system and a secondary optical system. At least one of the primary and secondary optical systems are different from each other to provide different first and second beam angles.

[0007] In any further embodiment described above, the step of operating the focusing infrared LED includes illuminating a vertical target area located 14 m to 22 m away from the focusing infrared LED adjacent to the end, and a portion of the ground and vehicle between the vertical target area and the focusing infrared LED itself.

[0008] In any further embodiment described above, the step of operating the focusing infrared LED includes illuminating a vertical target area located 0.5 m to 1.5 m above the ground on which the commercial vehicle is situated.

[0009] In any further embodiment described above, the focused infrared LED emits at least 0.4 μW / cm² in the target region. 2 It provides infrared light intensity.

[0010] In any further embodiment described above, the infrared light intensity is at least 1.0 μW / cm². 2 That is the case.

[0011] In any further embodiment described above, the infrared light intensity is at least 3.0 μW / cm². 2 That is the case.

[0012] In any further embodiment described above, the target area is movable relative to the focusing infrared LED based on the angle of the trailer relative to the tractor, and the step of operating the focusing infrared LED includes directing the focusing infrared LED toward the target area.

[0013] In an alternative exemplary embodiment, the camera arm for a vehicle camera monitoring system comprises a housing, a camera mounted on the housing and configured to provide a field of view along a trailer, a diffuse infrared LED positioned close to the housing and having a first beam angle, and a focused infrared LED positioned close to the housing and having a second beam angle smaller than the first beam angle.

[0014] In any further embodiment described above, the vehicle camera monitoring system includes a camera arm. The system is configured to provide diffuse infrared light to a first target area on the side of the trailer, and the system is configured to provide focused infrared light to a second target area at the end of the trailer.

[0015] In any further embodiment described above, the system includes a display that communicates with the camera and is configured to be mounted on a tractor. The display is configured to show a field of view, which corresponds to at least one of a Class II view and a Class IV view.

[0016] In any further embodiment described above, the system includes a controller configured to operate a diffuse infrared LED under a first condition to provide diffuse infrared light to the first target region. The controller is configured to operate a focused infrared LED under a second condition different from the first condition to provide focused infrared light to the second target region.

[0017] In any further embodiment described above, the system includes at least one input for communicating with the controller. The controller is configured to determine first and second conditions from the at least one input.

[0018] In any further embodiment described above, the at least one input includes an ambient light sensor, a reverse switch, image recognition software, a steering angle sensor, a vehicle speed sensor, and / or a manual switch.

[0019] In any further embodiment described above, the second target region is movable relative to the focusing infrared LED based on the angle of the trailer relative to the tractor, and the controller is configured to direct the focusing infrared LED toward the second target region during movement.

[0020] In any further embodiment described above, the camera arm is mounted on the tractor connected to the trailer, and the second target area is a vertical target area adjacent to the end, located 14 m to 22 m from the focusing infrared LED and 0.5 m to 1.5 m from the ground on which the trailer is placed, and includes part of the ground and vehicle between the vertical target area and the focusing infrared LED itself.

[0021] In any further embodiment described above, the focused infrared LED emits at least 0.4 μW / cm² in the target region. 2 It provides infrared light intensity.

[0022] In any of the further embodiments described above, the infrared light intensity is 1.0 μW / cm 2 or 3.0 μW / cm 2 and is at least one of these values.

[0023] In any of the further embodiments described above, the diffused infrared LED and the focused infrared LED each include at least one of a primary optical system and a secondary optical system. At least one of the primary optical system and the secondary optical system is different from the other to provide different first and second beam angles.

[0024] In any of the further embodiments described above, the diffused infrared LED has a lens different from the lens of the focused infrared LED.

Brief Description of the Drawings

[0025] The present disclosure can be further understood by referring to the following detailed description in conjunction with the accompanying drawings.

[0026] [Figure 1A] It is a schematic front view of a commercial truck equipped with a camera monitoring system (CMS) used to provide at least Class II and Class IV views.

[0027] [Figure 1B] It is a schematic top view of a commercial truck equipped with a camera mirror system that provides views of Class II, Class IV, Class V, and Class VI.

[0028] [Figure 2] It is a schematic upper view of a vehicle cab including a display.

[0029] [Figure 3] It is a schematic diagram of an infrared LED and its lighting characteristics.

[0030] [Figure 4]A schematic diagram of a camera arm having a diffuse infrared LED and a focused infrared LED for illuminating the first and second target regions shown in Figures 1A and 1B, respectively, is shown.

[0031] [Figure 5] This shows a movable infrared LED.

[0032] [Figure 6] These are plan views showing different positions of the second target area to which the focused infrared LED shown in Figure 4 or Figure 5 is directed while the vehicle is being operated.

[0033] [Figure 7] This is a method for illuminating commercial vehicles in low-light conditions.

[0034] The embodiments, examples, and substitutes, claims, or the following descriptions and drawings in the paragraphs above may be adopted independently or in any combination, including any of their various aspects or their respective individual features. Features described in relation to one embodiment are applicable to all embodiments unless such features are incompatible. Similar reference numbers and symbols in the various drawings indicate similar elements. [Modes for carrying out the invention]

[0035] A schematic diagram of a commercial vehicle 10 is shown in Figures 1A and 1B. The vehicle 10 includes a cab or tractor 12 for towing a trailer 14. It should be understood that the cab 12 and / or trailer 14 may be in any configuration. Although a commercial truck is intended in this disclosure, the present invention can be applied to other types of vehicles. The vehicle 10 incorporates a camera monitor system (CMS) 15 (Figure 2), which includes camera arms 16a and 16b on the driver's and passenger's sides mounted on the outside of the cab 12. If necessary, the camera arms 16a and 16b may also include conventional mirrors integrated with them, but in some examples, the CMS 15 can completely replace the mirrors. In additional examples, multiple camera arms may be included on each side, each arm housing one or more cameras and / or mirrors. Each arm 16a, 16b may also provide a housing surrounding electronics, such as a controller, configured to provide various features of the CMS 15.

[0036] Each camera arm 16a, 16b includes a base fixed to, for example, the driver's cab 12. A swivel arm is supported by a base and may be articulated to it. At least one rear-facing camera 20a, 20b is positioned within each camera arm 16a, 16b. Each of the exterior cameras 20a, 20b has an exterior field of view (FOV) that includes at least one of Class II and Class IV views (Figure 1b), which are legally defined views in the commercial truck industry. EX1 FOV EX2 The following is provided: A Class II view of a given side of vehicle 10 is a subset of the Class IV views of the same side of vehicle 10. If necessary, multiple cameras may be used in each camera arm 16a, 16b to provide these views. For example, Class II and Class IV views are defined in the European R46 Act, and the United States and other countries also have similar driver visibility requirements for commercial trucks. The reference to “Class” views is not intended to be limiting, but rather to illustrate the types of views that may be provided to the display by a particular camera.

[0037] The first and second video displays or monitors 18a, 18b are located on or near the A-pillars 19a, 19b (generally the A-pillar 19) in the driver's seat 12, on the driver's side and passenger's side, respectively, and display Class II and Class IV views on each side of the vehicle 10, which provide a rear view along the vehicle 10 captured by the external cameras 20a, 20b.

[0038] If video of Class V and / or Class VI views is also required, a camera housing 16c and camera 20c may be positioned in front of or near the front of the vehicle 10 to provide these views (Figure 1b). A third display 18c, positioned in the driver's seat 12 near the upper center of the windshield, can be used to display Class V and Class VI views forward of the vehicle 10 to the driver. Displays 18a, 18b, 18c (generally, displays 18) are oriented towards the driver area 24 in the driver's seat 22 where the driver / operator is seated in the driver's seat 26. The position, size, and (multiple) fields of view streamed to a particular display may differ from the configurations described herein, but still constitute the invention of this disclosure.

[0039] If a Class VIII view image is required, camera housings can be positioned on the sides and rear of the vehicle 10 to provide a field of view that includes part or all of the Class VIII zone of the vehicle 10. In such an example, the third display 18c may include one or more frames displaying the Class VIII view. Alternatively, additional displays can be added near the first, second, and third displays 18a, 18b, and 18c to provide dedicated displays for providing the Class VIII view.

[0040] Referring to FIG. 2, each display 18a, 18b (and others as necessary) includes a housing that is attached to the respective A-pillar 19 (i.e., 19a, 19b) by brackets, for example, or integrated into the vehicle trim. The screen 28 (i.e., 28a, 28b) is attached in front of the housing facing the driver. The screen 28 can be any suitable screen such as TFT, LCD, LED, OLED, and others. The controller 30 communicates with the camera 20 and the display 18, executes image processing, executes algorithms related to the CMS function, or may include other desired features of the CMS 15.

[0041] Referring to FIGS. 1A and 1B, there are specific areas around the vehicle 10 that must be monitored by the driver during driving, including the first and second target areas T1, T2. The first target area T1 is on the side of the trailer 14, and the second target area T2 is located at or near the end of the trailer 14.

[0042] These target areas are particularly important to monitor during reverse or docking operations, especially at night. Prior art CMSs with infrared LEDs can provide some infrared illumination to the first target area T1, but any infrared light is too diffused such that the intensity is substantially 0.00 μW / cm 2 at the trailer end, so no illumination is provided to the second target area T2. The second target area T2 covers the vertical target area adjacent to the trailer, as well as the ground and a part of the vehicle (e.g., generally the ground adjacent to the trailer end) between the vertical target area and the focused infrared LED itself. Thus, such a system essentially makes the driver unable to visually recognize the end of the trailer 14 at night.

[0043] To address the aforementioned deficiencies, the disclosed CMS15 uses both diffuse infrared LEDs 21 and focused infrared LEDs 121, as shown in Figure 2. Each of the infrared LEDs 21, 121 may be provided by one or more individual infrared LEDs as needed. The diffuse infrared LEDs 21 and 121 are configured to illuminate first and second target areas T1, T2 with infrared light, respectively, thereby providing the driver with sufficient nighttime visibility while driving the vehicle. The infrared LEDs 21, 121 are operated by a controller 30 in response to one or more inputs 50. The inputs 50 include at least one of an ambient light sensor, a reverse switch, image recognition software, a steering angle sensor, and / or a vehicle speed sensor. The infrared LEDs 21, 121 may be controlled by a manual input button or a combination of buttons via a menu structure.

[0044] A typical trailer 14 has a length ranging from 12m to 20m. trailer The camera arm 16 is positioned approximately 2m (L) from the front of the trailer. cab ) is located at a distance L from the trailer end. Therefore, generally, the camera arm 16 is located at a distance L from the trailer end. total The tractor 12 is mounted on the trailer 14, which is typically at a distance of 14 to 22 m from the condensing infrared LED 121. The bottom of the trailer 14 is located approximately 0.5 to 1.5 m from the ground on which the trailer is placed (i.e., the trailer deck). Therefore, the second target area T2 is located 14 to 22 m from the condensing infrared LED 121 and 0.5 to 1.5 m from the ground. The second target area T2 is at least 0.4 μW / cm². 2 It is desirable to illuminate with an infrared light intensity of . In another example, the focused infrared LED 121 provides at least 1.0 μW / cm² in the second target region T2. 2 It provides an infrared light intensity of at least 3.0 μW / cm², and in another example, the infrared light intensity is at least 3.0 μW / cm². 2 That is the case.

[0045] Current infrared LEDs do not provide the desired focused infrared light at the trailer end. Different light is provided by infrared LEDs having different designs. Diffuse infrared LEDs 21 and focused infrared LEDs 121 each include at least one of a primary optical system and a secondary optical system. Alternatively, instead of separate, separated infrared LEDs, composite lenses, bifocal lenses, shaved lenses and / or similar lenses can provide both focused and diffuse infrared LEDs. This second target area T2 may also include the dock, trailer, trailer wheels, and the ground adjacent to the wheels (e.g., areas requiring high visibility during nighttime docking / reverse operations). An example of a primary optical system is a lens design, including lens shape. An example of a secondary optical system is a reflector and a TIR optical system.

[0046] Referring to Figure 3, the focused infrared LED 121 has a lens 60 with a beam axis 62 where the infrared light has maximum intensity. The infrared intensity gradually decreases from the beam axis 62. The beam angle 64 is the angle at which the light intensity reaches 50% of the maximum light intensity, and the field angle 66 is the angle at which the light intensity reaches 10% of the maximum light intensity. At least one of the primary and secondary optical systems is different from each other to provide different first and second beam angles. In this example, the diffuse infrared LED 21 has a different lens from the lens of the focused infrared LED 121. The diffuse infrared LED 21 has a wide beam angle to illuminate a first target area T1, and the focused infrared LED has a very narrow beam angle to reach a second target area T2 and provide sufficient illumination to the driver.

[0047] The housing of the camera arm 16 is schematically shown in Figure 4. The camera 20 provides a Class II and / or Class IV view encompassing first and second target regions T1, T2. The display 18 is configured to display the field of view, but under low light conditions (e.g., less than 1 lux), the camera 20 cannot display a useful image unless the field of view is illuminated by infrared light. For this purpose, a diffuse infrared LED 21 is positioned close to (e.g., mounted) the housing and provides a first beam angle, and a focused infrared LED 121 is positioned close to (e.g., mounted) the housing and provides a second beam angle smaller than the first beam angle. In this way, diffuse infrared light is provided to the first target region T1 and focused infrared light is provided to the second target region T2.

[0048] The CMS15 may, if desired, turn the infrared LEDs on and off together under certain circumstances, but it may also be desirable to illuminate each target area during different scenarios based on different operating conditions. For example, the controller 30 is configured to operate the diffuse infrared LED 21 under a first condition to provide diffuse infrared light to a first target area T1. The first condition may be typical nighttime driving while the vehicle 10 is moving forward, which provides diffuse light without "hot spots" that could distract attention from objects outside the immediate target area or obscure the visibility of objects (i.e., only the diffuse infrared LED is turned on). In another example, the controller 30 is configured to operate the focused infrared LED 121 under a second condition different from the first condition to provide focused infrared light to a second target area T2. The second condition may correspond to a nighttime reverse docking operation (for example, both the diffuse and focused infrared LEDs are turned on, as the diffuse infrared LED may also be beneficial). Furthermore, to improve visibility, it may be desirable to illuminate the first target area T1 while reversing at night. Input 50 is used by the controller 30 to identify the conditions and operate the infrared LED as desired.

[0049] The second target region T2 is movable relative to the tractor 12 based on the angle of the trailer relative to the tractor 12, i.e., during a turning operation (e.g., T21, T22, T23 in Figure 6). In one example, the controller 30 is configured to direct the condensing infrared LED 121 onto the second target region T2 during movement so that the end of the trailer remains illuminated with infrared light.

[0050] In one example shown in Figure 4, the focused infrared LED 121 is provided by an array of multiple individual infrared LEDs 121a, 121b, 121c, and 121d. When the trailer 14 is at a trailer angle of 0° or close to it, the infrared LED 121 closest to the tractor 12 is turned on, and the others are turned off. As the trailer angle increases, the infrared LEDs further from the tractor are turned on, and the others are turned off. In this way, the focused infrared LED illumination moves effectively with the trailer edge.

[0051] In another example shown in Figure 5, the focusing infrared LED 121 includes a motor 70 on the camera arm 116 that moves along the beam axis with the trailer end. This can also be achieved by moving the camera arm around a pivot point in the case of an electrically powered folding camera arm.

[0052] A method 100 for illuminating a commercial vehicle in low light is shown in Figure 7. A controller 30 receives various inputs 50 (block 102), which allows the controller to determine whether and which infrared LEDs are needed. Method 100 includes the step of providing diffuse infrared LED light having a first beam angle under first conditions (block 104). Method 100 includes the step of providing focused infrared LED light having a second beam angle smaller than the first beam angle (block 106). Thus, during operation, the diffuse infrared LED operates under first conditions to provide diffuse infrared light to the sides of the commercial vehicle, and the focused infrared LED operates under second conditions, different from the first conditions, to provide focused infrared light to the edges of the commercial vehicle.

[0053] With respect to the hardware architecture, such a computer device may include a processor, memory, and one or more input / output (I / O) device interfaces, which are communicatively coupled via a local interface. The local interface may include, but is not limited to, one or more buses and / or other wired or wireless connections. The local interface may also include additional elements, such as controllers, buffers (caches), drivers, repeaters, and receivers that enable communication, although these are omitted for simplicity. Furthermore, the local interface may include address, control, and / or data connections to enable proper communication between the aforementioned components.

[0054] The controller 30 may be a hardware device for executing software, particularly software stored in memory. The controller 30 may be a custom-made or commercially available processor, a central processing unit (CPU), an auxiliary processor among several processors associated with the controller, a semiconductor-based microprocessor (in the form of a microchip or chipset), or any device for executing software instructions in a general-purpose manner.

[0055] Memory may include any one or combination of volatile memory elements (e.g., random access memory (RAM such as DRAM, SRAM, SDRAM, VRAM, etc.)) and / or non-volatile memory elements (e.g., ROM, hard drives, tapes, CD-ROMs, etc.). Furthermore, memory may incorporate electronic, magnetic, optical, and / or other types of storage media. Memory may have a distributed architecture in which various components are located remotely from one another but can be accessed from the processor.

[0056] Software in memory may contain one or more separate programs, each containing an ordered list of executable instructions for implementing logical functions. System components embodied as software may be constructed as source programs, executable programs (object code), scripts, or any other entity containing a set of instructions to be executed. If constructed as a source program, the program is translated through compilers, assemblers, interpreters, etc., which may or may not be contained in memory.

[0057] The input / output devices of this disclosure, which can be coupled to (multiple) system I / O interfaces, may include, but are not limited to, input devices such as keyboards, mice, scanners, microphones, cameras, mobile devices, and proximity devices. They may also include, but are not limited to, output devices such as printers and displays. Finally, the input / output devices may further include, but are not limited to, devices that communicate as both inputs and outputs, such as modulators / demodulators (modems, i.e., for accessing another device, system, or network), radio frequency (RF) or other transceivers, telephone interfaces, bridges, routers, etc.

[0058] When the controller 30 is operating, the processor may be configured to execute software stored in memory, communicate data with memory, and generally control the operation of the computer device according to the software. The software in memory is read in whole or in part by the processor, and is often buffered within the processor before being executed.

[0059] The disclosed CMS15 provides a separate infrared LED positioned at the outer end of the CMS, which is suitable for illuminating the end of the trailer when docking at night.

[0060] Furthermore, while specific configurations of components are disclosed in the exemplary embodiments, it should be understood that other configurations may also benefit from this disclosure. Although specific step sequences are shown, described, and described in the claims, it should be understood that, unless otherwise specified, the steps may be performed in any order, separated or combined, and still benefit from the present invention.

[0061] While different examples have specific components illustrated, embodiments of the present invention are not limited to any particular combination thereof. Some components or functions of one example may be used in combination with functions or components of another example.

[0062] While exemplary embodiments have been disclosed, those skilled in the art will recognize that certain modifications fall within the scope of the claims. Therefore, the following claims should be considered in order to determine their true scope and content.

Claims

1. A method for illuminating commercial vehicles in low-light conditions, The step of providing a camera monitoring system including a diffuse infrared LED having a first beam angle and a focused infrared LED having a second beam angle smaller than the first beam angle, The first step is to operate the diffuse infrared LED under the first condition to provide diffuse infrared light to the side of the commercial vehicle, The steps include operating the focusing infrared LED under a second condition different from the first condition to provide focused infrared light to the end of the commercial vehicle, and Methods that include...

2. The method according to claim 1, wherein the diffuse infrared LED and the focused infrared LED each have at least one of a primary optical system and a secondary optical system, and the at least one of the primary optical system and the secondary optical system are different from each other to provide different first and second beam angles.

3. The method according to claim 1, wherein the step of operating the focusing infrared LED includes illuminating a vertical target area adjacent to the end located 14 m to 22 m from the focusing infrared LED, and a portion of the vehicle and the ground between the vertical target area and the focusing infrared LED itself.

4. The method according to claim 3, wherein the step of operating the focusing infrared LED includes illuminating the vertical target area located 0.5 m to 1.5 m above the ground on which the commercial vehicle is placed.

5. The aforementioned focused infrared LED emits at least 0.4 μW / cm² in the target region. ２ The method according to claim 4, which provides infrared light intensity.

6. The infrared light intensity is at least 1.0 μW / cm². ２ The method according to claim 5.

7. The infrared light intensity is at least 3.0 μW / cm². ２ The method according to claim 6.

8. The method according to claim 3, wherein the target area is movable relative to the focusing infrared LED based on the angle of the trailer with respect to the tractor, and the step of operating the focusing infrared LED includes directing the focusing infrared LED toward the target area.

9. A camera arm for a vehicle camera monitoring system for a vehicle equipped with a trailer, Housing and A camera mounted on the aforementioned housing and configured to provide a field of view along the trailer, A diffuse infrared LED comprising at least one diffuse primary optical system and a diffuse secondary optical system located in close proximity to the housing and configured to supply diffuse infrared light to a first target region, wherein the diffuse infrared LED has a first beam angle at which the light intensity of the diffuse infrared LED reaches 50% of its maximum light intensity, A focusing infrared LED comprising at least one focusing primary optical system and a focusing secondary optical system, which are located close to the housing and configured to supply focused infrared light to a second target region, wherein the second target region has a vertical target region configured to be adjacent to the end of a trailer, located 14 m to 22 m from the focusing infrared LED and 0.5 m to 1.5 m from the ground on which the trailer is placed, and includes a portion of the vehicle and ground between the vertical target region and the focusing infrared LED itself, wherein the focusing infrared LED has a second beam angle at which the light intensity of the focusing infrared LED reaches 50% of its maximum light intensity, and at least one of the focusing primary optical system and the focusing secondary optical system are different from each other to provide the second beam angle which is smaller than the first beam angle, and A camera arm equipped with this feature.

10. A vehicle camera monitor system comprising the camera arm described in claim 9, configured to provide diffuse infrared light to a first target region on the side of the trailer, and to provide focused infrared light to a second target region at the end of the trailer.

11. It includes a display that communicates with the camera and is configured to be mounted on the tractor, and the display is configured to show the field of view. The system according to claim 10, wherein the field of view corresponds to at least one of a Class II view and a Class IV view.

12. The system according to claim 11, comprising a controller configured to operate the diffuse infrared LED under first conditions to provide diffuse infrared light to the first target region, and further comprising a controller configured to operate the focused infrared LED under second conditions different from the first conditions to provide focused infrared light to the second target region.

13. The system according to claim 12, comprising at least one input for communicating with the controller, wherein the controller is configured to determine the first condition and the second condition from the at least one input.

14. The system according to claim 13, wherein the at least one input includes an ambient light sensor, a reverse switch, image recognition software, a steering angle sensor, a vehicle speed sensor, and / or a manual switch.

15. The system according to claim 14, wherein the second target area is movable relative to the focusing infrared LED based on the angle of the trailer with respect to the tractor, and the controller is configured to direct the focusing infrared LED toward the second target area while moving.

16. The system according to claim 11, wherein the camera arm is attached to the tractor connected to the trailer.

17. The aforementioned focused infrared LED emits at least 0.4 μW / cm² in the target region. ２ The system according to claim 11, which provides infrared light intensity.

18. The infrared light intensity is 1.0 μW / cm². ２ Or 3.0 μW / cm ２ The system according to claim 17, wherein at least one of the above.

19. The camera arm according to claim 9, wherein the diffuse infrared LED and the focused infrared LED each include at least one of a primary optical system and a secondary optical system, and at least one of the primary optical system and the secondary optical system are different from each other to provide different first and second beam angles.

20. The camera arm according to claim 19, wherein the diffuse infrared LED has a lens different from the lens of the focused infrared LED.

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