Automobile Rear Lamp Automatic Light Intensity Adjustment Device Interlocked with Change in Visibility Distance and Adjustment Method Thereof

Abstract

To provide an automatic light intensity control device for vehicle rear lamps responsive to changes in visibility distance and a control method thereof.SOLUTION: The automatic light intensity control device comprises: a visibility distance measurement unit that is mounted on a driving vehicle or installed in the vicinity of a driving road so as to measure a visibility distance of the road in real time; and a light intensity calculation and control unit that is mounted on the driving vehicle so as to calculate an appropriate light intensity using visibility distance information measured by the visibility distance measurement unit and control the light intensity of rear lamps in real time.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an automatic luminous intensity adjustment device for an automobile rear lamp interlocked with a change in visibility distance and a method for adjusting the same. More specifically, the present invention relates to an automatic luminous intensity adjustment device for an automobile rear lamp interlocked with a change in visibility distance and a method for adjusting the same, which automatically calculates an appropriate luminous intensity using visibility distance information measured in real time in the vicinity of a traveling vehicle or a traveling road, and controls the luminous intensity of the rear lamp in real time using the calculated appropriate luminous intensity.

Background Art

[0002] Generally, it is known that the incidence rate of traffic accidents increases during bad weather such as typhoons, heavy local rain, and snowfall. However, according to the fatality rate of traffic accidents by weather, the number of deaths on rainy or snowy days increases by about 35% compared to sunny days, while on foggy days, it is investigated to be 5.6 times higher. This is analyzed to be due to the restriction of the driver's forward visibility due to bad weather or fog. The 29 - vehicle pile - up accident on the Seohae Bridge in 2006 and the 106 - vehicle pile - up accident on the Yeongjong Bridge in 2015 were both caused by the restriction of forward visibility due to fog.

[0003] The road management authorities recognize the danger of roads where fog occurs and install and operate safety facilities, but they simply notify the occurrence of fog on the VMS and only induce a reduction in the driving speed. As a result, multiple - vehicle pile - up accidents due to fog occur every year. According to the statistics in 2018, the number of deaths reached 29 and the number of injured reached 462. Therefore, a more effective and fundamental solution is required.

[0004] In addition, the tail lamp and brake lamp of a rear combination lamp (hereinafter referred to as "rear lamp") applied to an automobile both had a uniform luminous intensity, and thus could not be flexibly varied even when the visibility distance changed due to fog. Therefore, as shown in Fig. 1, when the visibility distance was not sufficiently ensured, only when the brake lamp was lit, the following vehicle could recognize this with a one-step delay. However, even if the following vehicle activated the braking device with a one-step delay due to this, a collision accident could not be avoided due to the braking distance.

[0005] The first reason why conventional tail lamps and brake lamps both had only a uniform luminous intensity was that there were no technical means to measure the visibility distance with restricted forward visibility distance by the vehicle or to receive data from the vehicle in real time. The second reason was that there were no experimental facilities that could provide a place and method to calculate the appropriate luminous intensity.

[0006] As a prior art document for controlling the luminous intensity of a tail lamp, there is Korean Registered Patent No. 10-1273448 (registered on June 4, 2013, hereinafter referred to as the "prior art document") previously filed by the applicant. The prior art document received visibility distance data measured outside the vehicle and adjusted the apparent luminance of the tail lamp of the vehicle to ensure the visibility of the driver of the following vehicle.

[0007] However, the prior art document could not reflect the degree of recognition according to the luminous intensity for each visibility distance of the driver by dividing the range of the visibility distance step by step and uniformly controlling the apparent luminance according to the step-by-step visibility distance. Also, by relying entirely on the visibility distance data measured outside the vehicle, additional road facilities had to be installed essentially, or both the preceding and following vehicles had to be provided with a light emitting part and a light receiving part. Therefore, there were limitations in that the accuracy of the data was low and it was not versatile.

[0008] Furthermore, most of the conventional control devices for automotive tail lamps controlled the luminous intensity according to the relative distance of the following vehicle. However, since various variables such as the speed of the following vehicle could not be considered, there was inefficiency in increasing the luminance unnecessarily, and there was also a problem that excessive luminous intensity rather hindered ensuring the visibility of the following vehicle.

[0009] In particular, future automobiles are expected to have a lower importance of recognizing the vehicle ahead by the driver due to the advancement of autonomous driving. Therefore, it is judged that there is also a need to propose a tail lamp in the non-visible light region that can be sensed by the sensing device of the autonomous driving vehicle, rather than a tail lamp in the visible light region for the driver to recognize.

Prior Art Documents

Patent Documents

[0010]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0011] The present invention has been made to solve the above-described problems, and its object is to continuously vary the luminous intensity of the rear lamp according to the real-time visibility distance of the traveling vehicle, thereby more stably ensuring the visibility of the driver of the following vehicle, accurately and easily obtaining the real-time visibility distance information, and controlling the luminous intensity by additionally considering the speed of the following vehicle, so as to provide an automotive rear lamp automatic luminous intensity adjustment device and its adjustment method that can radiate wavelengths in the non-visible light region so as to be sensed by an autonomous driving vehicle more efficiently and in conjunction with changes in the visibility distance.

Means for Solving the Problems

[0012] In order to solve the above technical problem, an automatic photometric adjustment device for a rear lamp of a motor vehicle linked to a change in the visibility distance of the present invention is mounted on a traveling vehicle or installed near a traveling road, and measures the visibility distance of the road in real time. It is characterized by including a visibility distance measurement unit and a photometric calculation control unit that is mounted on the traveling vehicle and calculates an appropriate luminous intensity using the visibility distance information measured by the visibility distance measurement unit to control the luminous intensity of the rear lamp in real time.

[0013] Further, the photometric calculation control unit can derive an appropriate luminous intensity using the visibility distance information measured in real time based on the cumulative data obtained by measuring the braking deceleration corresponding to the luminous intensity of the rear lamp and the visibility distance.

[0014] Further, the appropriate luminous intensity calculated by the photometric calculation control unit is derived by regression analysis on the cumulative data and can be linearly proportional to the visibility distance information measured in real time.

[0015] Further, the visibility distance measurement unit can include an image capture module that captures an image of the traveling road in real time, a region recognition module that identifies a traveling region using the image obtained by the image capture module, and a visibility distance calculation module that derives visibility distance information based on the traveling region identified by the image recognition module.

[0016] Furthermore, it further includes a speed detection unit that detects the speeds of the traveling vehicle and the following vehicle in real time and transmits them to the photometric calculation control unit, and the photometric calculation control unit can derive an appropriate luminous intensity by additionally reflecting the speed information of the traveling vehicle and the following vehicle detected in real time.

[0017] Furthermore, when the speed of the following vehicle is faster than the speed of the traveling vehicle, the photometric calculation control unit can calculate an appropriate luminous intensity by calculating the difference in the appropriate braking distance and correcting the visibility distance information.

[0018] And, by further providing an infrared LED in the rear lamp, when the visibility distance information is below a reference value, the infrared control unit can turn on the infrared LED of the rear lamp.

[0019] On the other hand, an automatic luminous intensity adjustment method for an automotive rear lamp that is linked to a change in visibility distance includes a visibility distance measurement step in which a visibility distance measurement unit mounted on a traveling vehicle or installed near a traveling road measures the visibility distance of the road in real time, an appropriate luminous intensity calculation step in which a luminous intensity calculation control unit mounted on the traveling vehicle calculates an appropriate luminous intensity using the visibility distance information, and a luminous intensity control step in which the luminous intensity calculation control unit controls the luminous intensity of the rear lamp in real time.

[0020] Also, the visibility distance measurement step may include a step in which the visibility distance measurement unit captures an image of the traveling road in real time, a step in which the traveling area is identified using the image acquired by the visibility distance measurement unit, and a step in which visibility distance information is derived based on the traveling area identified by the visibility distance measurement unit.

[0021] It further includes a speed detection step in which a speed detection unit detects the speeds of the traveling vehicle and the following vehicle in real time and transmits them to the luminous intensity calculation control unit, and the appropriate luminous intensity calculation step can derive an appropriate luminous intensity by additionally reflecting the speed information of the traveling vehicle and the following vehicle detected in real time.

[0022] It further includes a braking distance calculation step in which the difference in appropriate braking distance is calculated using the speed of the traveling vehicle and the speed of the following vehicle transmitted to the luminous intensity calculation control unit, and when the speed of the following vehicle is higher than the speed of the traveling vehicle, the appropriate luminous intensity calculation step can derive an appropriate luminous intensity by calculating the difference in appropriate braking distance and correcting the visibility distance information.

Effects of the Invention

[0023] According to the automotive rear lamp automatic light intensity adjustment device and its adjustment method that are linked to the change in the visibility distance of the present invention, appropriate light intensity is automatically calculated using the visibility distance information measured in real time near the running vehicle or the running road, and the light intensity of the rear lamp of the running vehicle can be controlled in real time using the calculated appropriate light intensity.

[0024] As a result, since the light intensity of the rear lamp is continuously and variably adjusted according to the real-time visibility distance of the running vehicle, there is an effect that the visibility of the driver of the following vehicle is more stably ensured.

[0025] In particular, the appropriate light intensity according to the visibility distance can provide a substantial light intensity considering the driver's cognitive reaction by utilizing the cumulative data obtained by measuring the braking deceleration according to the light intensity and the visibility distance, and can propose the optimal light intensity by learning the continuously ensured cumulative data.

[0026] Furthermore, by directly measuring the visibility distance information on the running vehicle or receiving the visibility distance information measured near the running road in real time, accurate and effective acquisition of visibility distance information is possible.

[0027] Depending on the embodiment, by detecting the speeds of the running vehicle and the following vehicle in real time or calculating the difference in the appropriate braking distances of the running vehicle and the following vehicle based on the detected speeds and controlling the light intensity, problems such as unnecessarily increasing the light intensity of the rear lamp or rather reducing the visibility of the following vehicle due to the increased light intensity can be solved.

[0028] Also, since it is expected that the number of autonomous driving vehicles will gradually increase in the future, by further providing the rear lamp with an infrared LED and lighting it when the visibility distance information is below the reference value, even when it is difficult for the infrared sensor provided in the following vehicle to recognize this and image sensing is difficult, high-precision autonomous driving performance can be expected.

Brief Description of the Drawings

[0029]

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Embodiments for Carrying Out the Invention

[0030] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0031] An automotive rear lamp automatic light intensity adjustment device A linked to the change in the visibility distance of the present invention is an invention in which a rear combination lamp (hereinafter referred to as "rear lamp") installed at the rear of a vehicle can continuously vary its light intensity according to the visibility distance of the road on which the vehicle is traveling.

[0032] On the other hand, the rear lamp RL of the present invention is a lamp installed so as to correspond to the visibility distance as a weather condition, and includes the entire width lamp, turn signal, and brake lamp. The light emission method of the lamp is defined to include any of direct light emission, surface light emission, hologram, characters, and figures.

[0033] In addition, the method of controlling the light intensity of the rear lamp RL includes any of the method of increasing the brightness of individual light sources constituting the lamp, the method of increasing the number of lit light sources, and the method of organically utilizing both methods.

[0034] First, as shown in FIGS. 2 and 3, the automotive rear lamp automatic light intensity adjustment device A of the present invention includes a visibility distance measurement unit 10 mounted on a traveling vehicle or installed in the vicinity of a traveling road to measure the visibility distance of the road in real time, and a light intensity calculation control unit 20 mounted on the traveling vehicle to adjust the light intensity of the rear lamp RL.

[0035] The visibility distance measurement unit 10 can be mounted on a traveling vehicle and move together, or installed in the form of a facility near the traveling road to measure the visibility distance of the road in real time. The visibility distance measurement unit 10 can utilize a method of using infrared rays in real time and a method of using an image captured in real time according to the embodiment, and may be embodied in a form of receiving and utilizing the visibility distance information Md provided by the Meteorological Agency. In addition, various specific visibility distance measurement methods of the visibility distance measurement unit 10 can be proposed.

[0036] On the one hand, the light intensity calculation control unit 20 is mounted on a traveling vehicle, receives the visibility distance information Md measured by the visibility distance measurement unit 10, calculates an appropriate light intensity Cd using the visibility distance information Md, and then controls the light intensity of the rear lamp RL in real time.

[0037] It is preferable that the light intensity calculation control unit 20 transmits and receives information to and from the visibility distance measurement unit 10 via a wireless communication network. However, when the visibility distance measurement unit 10 is mounted on a traveling vehicle, a wired communication network may be utilized. As the communication network for interconnecting these devices, an internal network or a wired / wireless Internet, LTE, LoRa communication using a sensor node, etc. can be utilized.

[0038] The light intensity calculation control unit 20 can be defined as a controller unit including a central processing unit, a memory, and an input / output bus. The "~ module" described in the present invention means a "block configured to be able to change or plug in a hardware or software system". That is, it can be defined as a single unit or block that performs a specific function in hardware or software.

[0039] More specifically, as shown in FIG. 4, the light intensity calculation control unit 20 includes a light intensity calculation module 21 and a light intensity control module 22, and can further include a data reception module 23, an output module 24, and a braking distance calculation module 25, which will be described later according to an embodiment.

[0040] The light intensity calculation module 21 of the light intensity calculation control unit 20 calculates an appropriate light intensity Cd using the visibility distance information Md transmitted from the visibility distance measurement unit 10, and the light intensity control module 22 controls the light intensity of the rear lamp RL in real time so that the appropriate light intensity Cd calculated by the light intensity calculation module 21 is exhibited.

[0041] Note that the photometric calculation module 21 can derive an appropriate luminous intensity Cd based on cumulative data obtained by measuring a braking deceleration rate corresponding to the luminous intensity of the rear lamp RL and the visual range distance. FIG. 5 shows a graph in which an averaged braking deceleration rate corresponding to the luminous intensity is derived at a specific visual range distance (Md = 50 m) for a number of subjects, and Table 1 below shows an example of averaging the cumulative data of the braking deceleration rate.

[0042]

Table 1

[0043] At this time, as exemplarily shown in FIG. 6, when a reference braking deceleration rate is defined based on the cumulative data of the average braking deceleration rate for each luminous intensity with respect to a specific visual range distance (Md = 50 m), the minimum luminous intensity that satisfies this is derived, and in the present invention, the minimum luminous intensity that satisfies this reference is defined as the appropriate luminous intensity Cd.

[0044] As described above, by using the cumulative data obtained by measuring the braking deceleration rate corresponding to the luminous intensity and the visual range distance, a correlation between the appropriate luminous intensity Cd and the visual range distance Md can be derived, and according to the accumulated data, it was confirmed that the appropriate luminous intensity Cd is linearly proportional to the visually measured range distance information Md in real time.

[0045] On the other hand, as one embodiment, according to the regression analysis of the data accumulated so far when the reference braking deceleration rate is defined as 2 m / s 2 as shown in FIG. 7, it was derived that the correlation between the appropriate luminous intensity Cd and the visual range distance Md is Cd = f(Md) or Cd = -1.3748Md + 617.24.

[0046] That is, the appropriate luminous intensity Cd calculated by the luminous intensity calculation control unit 20 of the present invention can derive the appropriate luminous intensity based on the cumulative data obtained by measuring the braking deceleration according to the luminous intensity of the rear lamp RL and the visual range distance. Therefore, it is possible to provide a substantial luminous intensity considering the driver's cognitive reaction. The cumulative data is updated periodically, and the luminous intensity calculation control unit 20 can learn the appropriate luminous intensity Cd by itself based on the updated cumulative data.

[0047] Accordingly, according to the automotive rear lamp automatic luminous intensity adjustment device A linked to the change in the visual range distance of the present invention, the luminous intensity of the rear lamp is continuously and variably adjusted according to the real-time visual range distance of the traveling vehicle. Therefore, the visibility of the driver of the following vehicle can be ensured more stably.

[0048] In the following, each embodiment of the visual range distance measurement unit 10 of the present invention will be described based on each embodiment. As described above, the visual range distance measurement unit 10 can be mounted on a traveling vehicle and move together, or can be installed in the form of a facility near the traveling road.

[0049] As a typical embodiment in which the visual range distance measurement unit 10 measures the visual range distance information Md, a method using infrared rays and a method using a captured image can be utilized. The method using infrared rays measures the visual range distance based on the irradiated infrared rays and the amount of sensed infrared rays. In the following, the method using an image will be described more specifically.

[0050] First, as shown in FIGS. 2 and 8, the visual range distance measurement unit 10 in the form mounted on a vehicle according to an embodiment of the present invention can include an image capturing module 11, a region recognition module 12, and a visual range distance calculation module 13. The image capturing module 11 of the visual range distance measurement unit 10 that moves together with the traveling vehicle captures an image of the traveling road in real time. The region recognition module 12 divides the image frame extracted from the image acquired by the image capturing module 11 into regions, and identifies and extracts only the traveling region where the vehicle travels among the divided regions.

[0051] Subsequently, the visibility distance calculation module 13 of the visibility distance measurement unit 10 finally derives visibility distance information Md by comparing it with the driving area of a normal state image based on the driving area identified by the image recognition module 12. At this time, the normal state image is an image captured under a weather condition where a visibility distance of 300 m or more is ensured. The visibility distance measurement unit 10 of the traveling vehicle includes a GPS module 14 and a communication module 15, and can receive a normal state image transmitted from the outside. According to the above embodiment, since the visibility distance information Md can be directly measured by the traveling vehicle, the advantage of being able to obtain accurate and effective visibility distance information is exhibited.

[0052] Also, according to another embodiment, as shown in FIG. 3, the visibility distance measurement unit 10 has a form of a facility near the traveling road, and includes the image capturing module 11, the area recognition module 12, and the visibility distance calculation module 13, and can transmit the measured visibility distance information Md to the data receiving module 23 of the photometric calculation control unit 20 mounted on the traveling vehicle via the communication module 15.

[0053] On the other hand, according to the automobile rear lamp automatic photometric adjustment device A linked to the change in the visibility distance of the present invention, by controlling the light intensity by additionally considering the speed of the following vehicle FV, it is possible to provide the light intensity in an optimized form to the driver of the following vehicle FV.

[0054] For this purpose, as shown in FIG. 9, the automobile rear lamp automatic photometric adjustment device A of the present invention includes a speed detection unit 30 that detects the speeds of the preceding vehicle LV (hereinafter, unified as "traveling vehicle") and the following vehicle FV in real time, and can transmit speed information to the photometric calculation control unit 20. At this time, the photometric calculation control unit 20 is configured to derive an appropriate light intensity Cd by additionally reflecting the speed information of the traveling vehicle LV and the following vehicle FV detected in real time.

[0055] More specifically, when the speed of the following vehicle FV is slower than that of the traveling vehicle LV, it is not necessary to additionally consider the light intensity. However, when the speed of the following vehicle FV is faster, there is a problem that even if the driver of the following vehicle FV recognizes the rear lamp RL of the traveling vehicle LV and operates the braking device, the braking distance cannot be sufficiently ensured. Therefore, this is for additionally improving this situation.

[0056] In addition, the speed detection unit 30 may further include a relative speed detection module 32 that detects the relative speed of the following vehicle with respect to the traveling vehicle, in addition to the traveling speed detection module 31 that is provided in any general vehicle. The relative speed detection module 32 can measure and detect the distance that changes in real time based on a distance sensor, or can measure using a speed sensor.

[0057] The speed of the following vehicle measured by the speed detection unit 30 can be transmitted to the light intensity calculation control unit 20 in a form in which the absolute speed is calculated, or can also be transmitted in the form of a relative speed. Therefore, the speed of the following vehicle defined in the present invention means including the relative speed.

[0058] According to one embodiment, as shown in FIG. 10, the light intensity calculation control unit 20 calculates the difference s in the appropriate braking distance, corrects the visibility distance information Md, and calculates the appropriate light intensity Cd when the speed V of the following vehicle FV f is faster than the speed V of the traveling vehicle LV l More specifically, when the light intensity calculation control unit 20 is transmitted the speed V of the traveling vehicle and the speed V of the following vehicle from the speed detection unit 30

[0059] the braking distance calculation module 25 calculates the difference s in the appropriate braking distance using the speed V of the traveling vehicle and the speed V of the following vehicle. l and the speed V of the following vehicle f If transmitted, l and the speed V of the following vehicle f

[0060] Further, the light intensity calculation module 21 of the light intensity calculation control unit 20 compares the difference s between the visibility distance information Md and the appropriate braking distance. If it is equal to or greater than the visibility distance information Md, as described above, Cd = f(Md).

[0061] On the contrary, if the visibility distance information Md is greater than the difference s of the appropriate braking distance, the light intensity calculation module 21 subtracts and corrects the difference s of the appropriate braking distance from the visibility distance information Md as shown in the following formula (1) to calculate the appropriate light intensity Cd.

[0062]

Equation

[0063] At this time, the difference s of the appropriate braking distance is calculated by the following formula (2). At this time, a is the reference deceleration of the vehicle.

[0064]

Equation

[0065] For example, when the speed V of the traveling vehicle l is 80 km / h and the speed V of the following vehicle f is 100 km / h, assuming that the reference deceleration a is 2 m / s 2 the difference s of the appropriate braking distance is calculated to be 61 m. If it is reflected in Cd = 1.3748(Md - s) + 617.24, which is the correlation according to an embodiment with respect to the appropriate light intensity Cd and the visibility distance Md, and subtracted and corrected, the appropriate light intensity Cd of 564 cd is derived.

[0066] Thereby, the automobile rear lamp automatic light intensity adjustment device A of the present invention calculates the difference s of the appropriate braking distance between the traveling vehicle LV and the following vehicle FV based on the detected speed and controls the light intensity, thereby eliminating the accompanying problems such as unnecessarily increasing the light intensity of the rear lamp RL or rather reducing the visibility of the following vehicle due to the increased light intensity.

[0067] On the one hand, as shown in FIG. 11, the rear lamp RL of the automotive rear lamp automatic light intensity adjustment device A of the present invention can further be equipped with an infrared LED. Further, it can include an infrared control unit 40 for controlling the lighting and the degree thereof of the infrared LED provided in the rear lamp RL.

[0068] When the visual range distance information Md transmitted from the visual range distance measurement unit 10 is less than or equal to a reference value, the infrared control unit 40 can turn on the infrared LED of the rear lamp RL. That is, since future automobiles will embody the advancement of autonomous driving and be equipped with an infrared sensor 45, the infrared sensor 45 can sense the infrared rays of the rear lamp RL of the preceding vehicle and receive the distance and speed information of the preceding vehicle at the wavelength in the non-visible light region.

[0069] In particular, depending on the embodiment, the infrared control unit 40 is manufactured to control the amount of infrared rays of the infrared LED, and can transmit the distance and speed information of the traveling vehicle as quantitative data.

[0070] Hereinafter, the automotive rear lamp automatic light intensity adjustment method M linked to the change in the visual range distance of the present invention will be described more specifically. As shown in FIG. 12, the automotive rear lamp automatic light intensity adjustment method M of the present invention includes a visual range distance measurement step S10, an appropriate light intensity calculation step S40, and a light intensity control step S50.

[0071] First, the visual range distance measurement step S10 is a step in which a visual range distance measurement unit 10 mounted on a traveling vehicle or installed near a traveling road measures the visual range distance of the road in real time. Although various methods can be utilized in the visual range distance measurement step S10, the method using the image captured in real time can proceed in a time-series stage as shown in FIG. 13.

[0072] If the image capturing module 11 of the visual range measurement unit 10 captures an image of the driving road in real time (S11), the area recognition module 12 of the visual range measurement unit 10 divides the image frame extracted from the image acquired by the image capturing module 11 into areas, and identifies and extracts only the driving area where the vehicle travels in the divided areas (S12).

[0073] After that, the visual range calculation module 13 of the visual range measurement unit 10 finally derives the visual range information Md based on the driving area identified by the image recognition module 12 and in comparison with the driving area of a normal state image (S13). At this time, the visual range measurement unit 10 of the traveling vehicle is equipped with a GPS module 14 and a communication module 15, and a normal state image can be transmitted from the outside for comparison of the driving area.

[0074] On the other hand, the appropriate luminous intensity calculation step S40 is a step in which the luminous intensity calculation control unit 20 mounted on the traveling vehicle calculates the appropriate luminous intensity Cd using the visual range information Md. The luminous intensity calculation module 21 of the luminous intensity calculation control unit 20 can derive the appropriate luminous intensity based on the cumulative data obtained by measuring the luminous intensity of the rear lamp RL and the braking deceleration corresponding to the visual range.

[0075] Finally, the luminous intensity control step S50 is a step in which the luminous intensity calculation control unit 20 controls the luminous intensity of the rear lamp RL in real time. The luminous intensity control module 22 of the luminous intensity calculation control unit 20 controls the luminous intensity of the rear lamp RL in real time so that the appropriate luminous intensity Cd calculated by the luminous intensity calculation module 21 is exhibited.

[0076] On the other hand, in the automobile rear lamp automatic luminous intensity adjustment method M of the present invention, in order to provide a luminous intensity in an optimized form for the driver of the following vehicle FV by additionally considering the speed of the following vehicle FV when controlling the luminous intensity, a speed detection step S20 can be performed in which a speed detection unit 30 detects the speeds of the traveling vehicle LV and the following vehicle FV and transmits them to the luminous intensity calculation control unit 20.

[0077] At this time, in the speed detection step S20, the speed detection unit 30 can additionally include a relative speed detection module 32 that detects the relative speed of the following vehicle with respect to the traveling vehicle in the traveling speed detection module 31.

[0078] Thereafter, the appropriate luminous intensity calculation step S40 can prevent a collision from occurring by additionally reflecting the speed information of the traveling vehicle LV and the following vehicle FV detected in real time and deriving the appropriate luminous intensity Cd, so that the driver of the following vehicle FV with a higher speed recognizes the rear lamp RL of the traveling vehicle LV with a one-step delay.

[0079] According to an embodiment, a braking distance calculation step S30 for calculating the difference s in the appropriate braking distance using the speed V of the traveling vehicle transmitted to the braking distance calculation module 25 of the luminous intensity calculation control unit 20 l and the speed V of the following vehicle f can be advanced.

[0080] Thereafter, in the appropriate luminous intensity calculation step S40, when the speed V of the following vehicle FV f is higher than the speed V of the traveling vehicle LV l the appropriate luminous intensity Cd can be derived by calculating the difference s in the appropriate braking distance and correcting the visual range distance information Md.

[0081] Also, depending on the embodiment, the rear lamp RL is additionally provided with an infrared LED, and in the luminous intensity control step S50, when the visual range distance information Md is below the reference value, the infrared control unit 40 can control the infrared LED of the rear lamp RL to be lit. At this time, the infrared control unit 40 is manufactured to control the amount of infrared rays of the infrared LED, and can also transmit the distance and speed information of the traveling vehicle as quantitative data.

[0082] The automatic rear lamp automatic light intensity adjustment device A and its adjustment method M according to the present invention described above, which are linked to the change in the visual range distance, should be understood to be capable of being implemented in other specific forms without those with ordinary knowledge in the technical field to which the present invention pertains changing the technical idea and essential features of the present invention.

[0083] Therefore, it should be understood that all the above-described embodiments are exemplary in all aspects and not restrictive. The scope of the present invention is defined by the scope of the claims described below rather than the above-described detailed description. All changes or modified forms derived from the meaning and scope of the claims and equivalent concepts should be construed as being included within the scope of the present invention.

Explanation of Reference Numerals

[0084] A Automatic rear lamp automatic light intensity adjustment device RL Rear lamp 10 Visual range distance measurement unit 20 Light intensity calculation and control unit 30 Speed detection unit 40 Infrared control unit LV Traveling vehicle FV Following vehicle M Automatic rear lamp automatic light intensity adjustment method S10 Visual range distance measurement step S20 Speed detection step S30 Braking distance calculation step S40 Appropriate light intensity calculation step S50 Light intensity control step

Claims

1. A visibility distance measurement unit that is mounted on a traveling vehicle or installed near a traveling road and measures the visibility distance of the road in real time, and a photometric calculation control unit that is mounted on a traveling vehicle, calculates an appropriate luminous intensity using the visibility distance information measured by the visibility distance measurement unit, controls the luminous intensity of the rear lamp in real time, and based on a regression analysis of cumulative data obtained by measuring a braking deceleration corresponding to the luminous intensity and visibility distance of the rear lamp, derives the minimum luminous intensity that satisfies the reference braking deceleration using the visibility distance information measured in real time as the appropriate luminous intensity, and further includes a speed detection unit that detects the speeds of the traveling vehicle and the following vehicle in real time and transmits them to the photometric calculation control unit, wherein the photometric calculation control unit calculates the difference in appropriate braking distance and corrects the visibility distance information when the speed of the following vehicle is higher than the speed of the traveling vehicle, thereby calculating the appropriate luminous intensity. An automotive rear lamp automatic luminous intensity adjustment device that is linked to changes in the visibility distance.

2. The visibility distance measurement unit includes an image capture module that captures an image of the traveling road in real time, a region recognition module that identifies the traveling region using the image acquired by the image capture module, and a visibility distance calculation module that derives visibility distance information based on the traveling region identified by the region recognition module. The automotive rear lamp automatic luminous intensity adjustment device according to claim 1, characterized by including the above.

3. The rear lamp further includes an infrared LED, and when the visibility distance information is below a reference value, an infrared control unit turns on the infrared LED of the rear lamp. The automotive rear lamp automatic luminous intensity adjustment device according to claim 1, characterized by the above.

4. a visibility distance measurement step in which a visibility distance measurement unit mounted on a traveling vehicle or installed near a traveling road measures the visibility distance of the road in real time, a speed detection step in which a speed detection unit detects the speeds of the traveling vehicle and the following vehicle in real time and transmits them to a photometric calculation control unit, and a braking distance calculation step in which the difference in appropriate braking distance is calculated using the speed of the traveling vehicle and the speed of the following vehicle transmitted to the photometric calculation control unit A luminous intensity calculation control unit mounted on a traveling vehicle controls the luminous intensity of a rear lamp in real time using visibility distance information, and based on a regression analysis of cumulative data obtained by measuring a braking deceleration corresponding to the luminous intensity and visibility distance of the rear lamp, derives the minimum luminous intensity that satisfies a reference braking deceleration using the visibility distance information measured in real time as the appropriate luminous intensity. When the speed of a following vehicle detected in real time is higher than the speed of the traveling vehicle, an appropriate luminous intensity calculation step for calculating an appropriate luminous intensity by calculating the difference in appropriate braking distance and correcting the visibility distance information, A method for automatically adjusting the luminous intensity of an automotive rear lamp in conjunction with a change in visibility distance, characterized by including a luminous intensity control step in which the luminous intensity calculation control unit controls the luminous intensity of the rear lamp in real time. **Claim 5** The visibility distance measurement step includes: a step in which the visibility distance measurement unit captures an image of the traveling road in real time; a step of identifying a traveling area using the image acquired by the visibility distance measurement unit; a step of deriving visibility distance information based on the traveling area identified by the visibility distance measurement unit, the method for automatically adjusting the luminous intensity of an automotive rear lamp in conjunction with a change in visibility distance according to claim 4.

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