KR20200073038A - lamp system for vehicle - Google Patents

Abstract

A vehicle lamp system according to an embodiment of the present invention includes: a light irradiation unit forming a beam pattern in front; a light irradiation control unit controlling the light irradiation unit to adjust the amount of light in at least a partial area of the beam pattern; an image detection unit detecting the front image of one′s own vehicle; a target determination unit determining whether or not an identified front object is an object to be controlled; an area detection unit which detects a target area corresponding to the position of the object to be controlled among the beam pattern areas; and an operation unit which calculates the distance between the object to be controlled and the one′s own vehicle based on a detected target area. Therefore, the present invention provides the vehicle lamp system which calculates a distance between the one′s own vehicle and a control object positioned in front thereof.

Description

Lamp system for vehicle

The present invention relates to a vehicle lamp system, and specifically to a vehicle lamp system for calculating the distance between the subject vehicle and the control object.

In general, a vehicle is equipped with various types of lamps having a lighting function for easily identifying an object located around the vehicle during night driving and a signal function for informing the driving condition of the vehicle to other vehicles or road users.

For example, head lamps and fog lamps primarily intended for lighting functions, and turn signal lamps, tail lamps, and brakes intended for signal functions. Brake lamps, side markers, etc. are provided, and such installation lamps and regulations are prescribed in the regulations for the installation standards and specifications to sufficiently exhibit each function.

Among the vehicle lamps, the head lamp forms a low beam pattern or a high beam pattern so that the driver's front view is secured when the vehicle is driving in a dark environment such as at night, and plays a very important role in driving safely. Is doing.

In such a vehicle lamp, a head lamp that selectively forms a low beam pattern or a high beam pattern is provided as one lamp module depending on the provision of a shield member, and forms a high beam pattern and a head lamp forming a low beam pattern. In some cases, the head lamps are provided as separate lamp modules.

The vehicle lamp mainly maintains a low beam pattern during normal driving to prevent glare from a driver of a front vehicle or a preceding vehicle driver, and forms a high beam pattern as required when driving at a high speed or when driving in a dark environment. By doing so, it will promote safe driving.

Therefore, recently, while driving in a state in which a high beam pattern is formed, when a front vehicle or a preceding vehicle is detected, the light illumination angle, brightness, width, and length of the lamp are automatically adjusted to glare the driver of the front vehicle or the preceding vehicle. In order not to induce an induction, an adaptive driving beam (ADB) headlamp that forms a dark zone in a certain area, that is, an adaptive headlamp is provided.

Korean Open Patent No. 2015-0118669 (2015.10.23.)

The problem to be solved by the present invention is to provide a vehicle lamp system that calculates a distance between a magnetic vehicle and a control object located in front.

In addition, it is to provide a vehicle lamp system for detecting a target area by comparing a front image including a plurality of pixel beam patterns and a control target.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

A vehicle lamp system according to an embodiment of the present invention includes a light irradiation unit forming a beam pattern in the front, a light irradiation control unit controlling the light irradiation unit to adjust the amount of light in at least a portion of the beam pattern, and a front image of the vehicle. An image detection unit to detect, an identification unit to identify a front object through the detected front image, an object determination unit to determine whether the identified front object is a control target, and a position corresponding to the position of the control target in the beam pattern region An area detection unit that detects a target area may include a calculation unit that calculates a distance between the control object and the subject vehicle based on the detected target area.

According to the vehicle lamp of the present invention, there are one or more of the following effects.

By comparing the beam pattern and the front image, the position of the control object can be determined.

With a single camera and a vehicle lamp, the distance between the control object and the subject vehicle can be calculated.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a block diagram schematically showing a vehicle lamp system according to an embodiment of the present invention.
2 is a view schematically showing a light irradiation unit of a vehicle lamp according to an embodiment of the present invention.
3 is a view showing a beam pattern of a vehicle lamp system according to an embodiment of the present invention.
4 is a view schematically showing a light source unit and a plurality of pixel beam patterns of a vehicle lamp system according to an embodiment of the present invention.
5 is a view schematically showing an image detection unit of a vehicle lamp system according to an embodiment of the present invention.
6 and 8 are views schematically showing a scanning method of a vehicle lamp system according to an embodiment of the present invention.
9 is a view schematically showing a light source unit and a sensor unit of a vehicle lamp system according to an embodiment of the present invention.
10 is a view for explaining the first main surface and the second main surface.
11 and 12 are views schematically illustrating a light irradiation unit and an image detection unit of a vehicle lamp system according to an embodiment of the present invention.
13 is a flowchart illustrating a method of calculating a distance between a subject and a control object of a vehicle in a vehicle lamp system according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains. It is provided to fully inform the holder of the scope of the invention, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

Thus, in some embodiments, well-known process steps, well-known structures, and well-known techniques are not specifically described in order to avoid obscuring the present invention.

The terminology used herein is for describing the embodiments and is not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. Includes and/or comprising, as used in the specification, does not exclude the presence or addition of one or more other components, steps and/or actions other than the mentioned components, steps and/or actions. Used as. And, “and/or” includes each and every combination of one or more of the items mentioned.

In addition, the embodiments described herein will be described with reference to perspective views, cross-sectional views, side views and/or schematic views, which are ideal exemplary views of the present invention. Therefore, the shape of the exemplary diagram may be modified by manufacturing technology and/or tolerance. Therefore, the embodiments of the present invention are not limited to the specific shapes shown, but also include changes in the shape generated according to the manufacturing process. In addition, in each of the drawings shown in the embodiment of the present invention, each component may be slightly enlarged or reduced in view of convenience of description.

Hereinafter, preferred embodiments of the vehicle lamp system according to the present invention will be described in detail based on the attached exemplary drawings.

1 is a block diagram schematically showing a vehicle lamp system according to an embodiment of the present invention, FIG. 2 is a schematic view of a light irradiation unit according to an embodiment of the present invention, and FIG. 3 is a view according to an embodiment of the present invention 4 is a view showing a beam pattern, and FIG. 4 is a view showing a light source unit and a plurality of pixel beam patterns according to an embodiment of the present invention.

Referring to Figure 1, the vehicle lamp system according to an embodiment of the present invention the light irradiation unit 100, the light irradiation control unit 200, the image detection unit 300, the identification unit 400, the object determination unit 500, the area It may include a detection unit 600, the calculation unit 700.

The light irradiation unit 100 may be formed to form a beam pattern in the front. Specifically, it may be formed of a vehicle lamp mounted on a vehicle, and may include a light source unit 110 and a first optical unit 120.

Referring to FIGS. 2 and 4, the light source unit 110 may include a plurality of light sources 112 arranged in a matrix shape, and the first optical unit 120 may include a plurality of optical members arranged in the direction of the light travel path. It may include. Specifically, the light source 112 may be formed to generate light having a light amount or color suitable for the use of the vehicle lamp of the present invention, and a light emitting diode (LED) semiconductor light emitting device may be used. Accordingly, as illustrated in FIG. 3, light generated from the light source unit 110 may be incident and emitted to the first optical unit 120 to form a beam pattern BP. In addition, light generated from the plurality of light sources 112 is incident and emitted to the first optical unit 120 to form a plurality of pixel beam patterns PBP, and the beam pattern BP includes a plurality of pixel beam patterns PBP. It can be formed as.

Here, the brightness of the beam pattern BP may be formed such that it becomes smaller toward the outside from the center of the beam pattern. The plurality of optical members of the first optical unit 120 may be formed of at least one of a plurality of lenses, a plurality of mirrors, and a plurality of prisms. In the present invention, the use of a plurality of lenses as a plurality of optical members will be described as an example.

The light irradiation control unit 200 serves to control the light irradiation unit 100 to adjust the amount of light in at least a portion of the beam pattern BP. For example, the beam pattern BP may be formed into a low beam pattern and a high beam pattern by controlling the amount of light of the light source unit 110, and as illustrated in FIG. 4, to prevent glare from the driver of the front vehicle. As the at least one light source of the plurality of light sources 112 is controlled, a dark zone SS may be formed in the beam pattern. Conversely, the light irradiation control unit 200 may increase the amount of light of at least one pixel beam pattern PBP of the beam pattern by controlling the at least one light source 112.

Meanwhile, the beam pattern BP may be formed in correspondence to an image in which the light-emitting image of the light source unit 110 is vertically inverted. For example, when the light emitting surface of the light source unit is formed by an image in which at least one light source is turned off, as shown in FIG. 4(a), the beam pattern emits light with a dark zone as shown in FIG. It may be formed to correspond to the image. As described above, when the light-emitting image and the beam pattern of the light source unit are inverted up, down, left, and right, the number of optical members included in the optical unit can be reduced, thereby reducing the overall size of the vehicle lamp.

5 is a view schematically showing an image detection unit of a vehicle lamp system according to an embodiment of the present invention.

The image detection unit 300 serves to detect and form a front image of the own vehicle. For example, the front image may be formed by photographing the front as in the camera. Specifically, the image detection unit 300 may include a sensor unit 310 and a second optical unit 320.

First, the second optical unit 320 may include a plurality of optical members arranged according to a direction in which light is incident, and the sensor unit 310 is incident on the second optical unit 320 to form a front image. It can be formed by a plurality of pixels where light is formed. For example, the sensor unit may be formed of a CCD (Charge Coupled Device) or a Complementary Metal Oxide Semiconductor (CMOS). Here, the plurality of pixels may be formed in a matrix shape.

The identification unit 400 is formed to identify the front object through the detected front image, and the object determination unit 500 serves to determine whether the identified front object is the control object V. Meanwhile, when the front object is the control object V, the object determination unit 500 may set a separate identifier for the control object or determine the position angle of the control object. In addition, the identification unit 400 and the object determination unit 500 may be formed as a control unit of the image detection unit 300 or may be formed as separate devices inside the vehicle.

Accordingly, in the vehicle lamp system according to an embodiment of the present invention, the light quantity of at least one light source among a plurality of light sources may be controlled to form a dark zone SS in a region of a beam pattern corresponding to a position of a control object. On the other hand, the present invention may not view all objects in front as a control target. For example, the object determination unit 500 may be set to determine the control object V only when the front object identified by the identification unit 400 is a person or a vehicle.

The area detection unit 600 serves to detect the target area R corresponding to the position of the control object V among the beam pattern BP areas, and the area detection unit 600 includes the beam pattern BP and the control object V ) Is compared to detect the target region R by comparing the front image.

Specifically, the area detection unit 600 is formed to sequentially scan the plurality of pixel beam patterns PBP by controlling the light irradiation control unit 200, and the plurality of pixel beam patterns PBP according to the sequential scan of the area detection unit 600. ) To change the amount of light of at least one pixel beam pattern PBP.

That is, the scan performed by the area detection unit 600 may be performed by sequentially changing the light amounts of the plurality of pixel beam patterns PBP. Accordingly, when the position of the control object V on the front image corresponds to the at least one pixel beam pattern PBP in which the light amount is changed, the at least one pixel beam pattern in which the light amount is changed may be formed as the target region R. That is, at least one pixel beam pattern PBP among the plurality of pixel beam patterns PBP may be included in the target region.

Further, the light irradiation control unit 200 may continuously control the light amount of at least one pixel beam pattern PBP in which the light amount is changed to form a dark zone in the region of the pixel beam pattern corresponding to the target region R. Here, a plurality of target regions R may be formed corresponding to the number of control objects V included in the detected front image.

The calculation unit 700 serves to calculate the distance H between the control object V and the subject vehicle based on the target area R detected by the area detection unit 600. Accordingly, the distance H between the control object V and the subject vehicle can be obtained through the operation unit 700. Conventionally, in order to obtain a distance between a magnetic vehicle and a control object, a plurality of sensors, a radar, and a plurality of cameras are provided in the vehicle to process a large amount of cost and a lot of signals, but the present invention uses a vehicle lamp and a single camera to control the magnetic vehicle and the control object The distance between (V) can be obtained accurately and efficiently.

In addition, the present invention can efficiently form the armband (SS) through the calculated distance (H). For example, when the calculated distance H is larger than a predetermined distance, the amount of light irradiated to the region of the pixel beam pattern corresponding to the target region R can be adjusted to a preset light amount, and when it is shorter than the predetermined distance, By extinguishing at least one light source that irradiates light to an area of the pixel beam pattern corresponding to the target area R to efficiently form an overall beam pattern, it is possible to efficiently secure a driver's field of view and prevent glare at the same time.

As described above, when a plurality of target regions R are formed, both the plurality of target regions R and the distance H of the subject vehicle are calculated and irradiated to the plurality of target regions R in a short distance order. The beam pattern can be efficiently formed by controlling the amount of light. For example, the shorter the calculated distance, the weaker the amount of light can be formed.

In addition, the distance H calculated by the operation unit 700 of the present invention can be applied to a driver assistance device (ADAS) and an autonomous vehicle that require a distance value between a control object (V) and a subject vehicle.

Hereinafter, a scanning method of the region detection unit 600 according to an embodiment of the present invention will be described.

6 and 8 are views schematically showing a scanning method of a vehicle lamp system according to an embodiment of the present invention.

As described above, the area detector 600 may detect a target area by comparing and scanning a beam pattern BP including a plurality of pixel beam patterns PBP and a front image including the control object V. .

Specifically, the region detection unit 600 may control the light irradiation control unit 200 to scan from one side to the other side of the beam pattern BP. Accordingly, the region detection unit 600 controls the light irradiation control unit 200 to sequentially control the amount of light of the plurality of pixel beam patterns PBP, and the amount of light controlled pixel beam pattern PBP and the control included in the front image. When the position of the object V corresponds, the pixel beam pattern PBP in which the amount of light is controlled may be set as the target area R.

On the other hand, whether the position of the control object V and the pixel beam pattern PBP correspond to the above-described identifier and whether the pixel beam pattern is matched or included, the area detection unit determines, or the color edge position information of the control object and the pixel beam pattern PBP. The region detection unit 600 may determine whether or not a match is included or not.

On the other hand, when sequentially scanning all the pixel beam patterns as in the above method, it may take a lot of time, so the region detector 600 may divide the plurality of pixel beam patterns into a plurality of regions and scan in a region-by-region manner. For example, a plurality of regions are formed from the first region to the fourth region, and the light irradiation control unit 200 is controlled to show a plurality of pixel beam patterns included in the first region, as illustrated in number 1 in FIG. 6. The amount of light of (PBP) may be simultaneously controlled to scan whether it corresponds to the position of the control object, and thereafter, the amount of light of a plurality of pixel beam patterns included in the second to fourth regions may be sequentially controlled to scan.

In addition, when it is determined that a control object exists in one of a plurality of regions, that is, when one region and a position of the control object correspond, a plurality of included in this region, as illustrated in 2 to 5 of FIG. 6. The pixel beam pattern PBP may be re-scanned. At this time, the scan may be performed until the plurality of pixel beam patterns PBP are sequentially scanned or divided into a plurality of regions to scan the locations of the control object V and at least one pixel beam pattern. As a result, the area detector 600 detects the minimum number of pixel beam patterns PBP corresponding to the position of the control object V among the plurality of pixel beam patterns PBP, and detects at least one pixel beam pattern PBP. ) Can be formed as the target region R.

As described above, the plurality of pixel beam patterns PBP may be formed in a mattress shape. Accordingly, as illustrated in FIG. 6, a plurality of pixel beam patterns PBP positioned in the lateral direction among the plurality of pixel beam patterns PBP are formed as one region, or as shown in FIG. 7 in the longitudinal direction among the plurality of beam patterns. The plurality of located pixel beam patterns PBP may be formed as one region, and the plurality of pixel beam patterns PBP may be scanned for each region. In addition, although it is illustrated in FIGS. 6 and 7 that a plurality of regions are scanned one by one, differently, the region detection unit 600 may control the light irradiation control unit 200 to simultaneously scan a plurality of regions. .

As another method, as illustrated in FIG. 8, the region detector 600 may scan in a divided manner in which an unscanned pixel beam pattern region of a plurality of pixel beam patterns PBP is divided and scanned in half.

In other words, the split type scan first scans approximately half of the unscanned area among the plurality of pixel beam pattern (PBP) areas, and then determines whether the scanned half area corresponds to the position of the control object, and if not, the unscanned area again It is a method to determine whether or not to control or include the position of a control object by scanning approximately half of the.

Specifically, as illustrated in FIGS. 1 to 3 of FIG. 8, the light irradiation control unit 200 controls the amount of light of about half of the plurality of pixel beam patterns PBP under the control of the region detection unit 600, The area detection unit 600 determines whether the positions of the plurality of pixel beam patterns PBP and the control object V controlled by the amount of light, and if not, at least one pixel beam pattern PBP and the control object V ), the light irradiation control unit 200 controls the amount of light of about half of the plurality of pixel beam patterns in which the amount of light is not controlled, and the area detection unit 600 again controls the plurality of newly controlled pixel beam patterns ( PBP) and the position of the control object can be determined.

In addition, as illustrated in 4 to 6 of FIG. 8, when it is determined that one region of the region scanned by the division method corresponds to the position of the control object V, a plurality of pixels of the region scanned by the division method By re-scanning the beam pattern PBP in a divided manner, a minimum number of pixel beam patterns PBP corresponding to the position of the control object V among the plurality of pixel beam patterns PBP is detected, and the detected at least one The pixel beam pattern PBP may be formed as the target region R.

On the other hand, in the drawing, although all control objects are shown to correspond to one pixel beam pattern, the size of the control object V included in the front image varies according to the distance H between the subject vehicle and the control object V. Therefore, the number of pixel beam patterns PBP corresponding to the position of the control object V may also vary. Therefore, the target region R may be formed in a plurality of pixel beam patterns.

In addition, in order to detect the target area R, the amount of light of at least one pixel beam pattern in which the amount of light has been changed is controlled when the position of the control object does not correspond to the at least one pixel beam pattern PBP that has been scanned, that is, the amount of light is controlled. The region detection unit 600 controls the light irradiation control unit 200 to be formed with a previous light amount, so that a driver can efficiently secure a field of view even during scanning.

In addition, even in the case of re-scanning, the area detection unit 600 may control the light irradiation control unit 200 so that the controlled light amount of the at least one pixel beam pattern is formed as the light amount before the control, and is controlled again.

Hereinafter, an operation unit according to an embodiment of the present invention will be described in detail.

As described above, the calculator 700 may calculate the distance H between the own vehicle and the control object V.

At this time, the method has a difference in the distance calculation method depending on whether the specification of the image detection unit 300 is known. That is, the method of calculating the distance H may vary depending on whether specific specifications of the camera mounted on the vehicle are recorded in the system.

9 is a view schematically showing a light source unit 110 and a sensor unit 310 of a vehicle lamp system according to an embodiment of the present invention, and FIG. 10 is a view for explaining a first main surface and a second main surface. .

If the specific specifications of the image detection unit 300 are known, the control object V and the subject vehicle are based on the length of at least one light source 112 irradiating light to the position of the control object and the pixel length of the sensor unit 310. The distance H of the liver can be calculated by the calculator 700. Here, the length of the at least one light source 112 is formed in the vertical direction of the first optical axis Ax1 of the first optical unit 120, and the length of the at least one pixel is the second optical axis of the second optical unit 320 It may be formed in the vertical direction of (Ax2).

The length of the target region R including at least one pixel beam pattern corresponding to the length of the control target V and the position of the control target V is a relative size, so it is difficult to specifically calculate, but it is difficult to calculate the light in the target region R. The size of the at least one light source 112 irradiating the light and the size of at least one pixel in which the light reflected from the target area R is formed among the plurality of pixels of the sensor unit 310 are the specifications of the light source 112 and the camera. You can know through the specifications of

Accordingly, referring to FIG. 9, the following relational expression may be determined.

Here, x and y are the lengths of the target region R, x'is the length of at least one pixel where light reflected from the target region R is formed, and y'is the light irradiated to the target region R. The length of at least one light source 112 to be generated, l'is the distance from y'to the first main surface 122 of the light irradiation unit 100, L'is the first of the image detection unit 300 at x' The distance to the main surface 322, l is the distance from the second main surface 124 of the light irradiation unit 100 to the surface where the target region R is formed, and L is the second main surface of the image detection unit 300 It is the distance from the surface 324 to the surface where the target region R is formed. The first main surface and the second main surface will be described later. As a result, x=y can be formed, so the above two equations can be connected as follows.

Further, the distance (l) formed from the second main surface 124 of the light irradiation unit 100 to the surface of the target area R and the target area R of the second major surface 324 of the image detection unit 300 The distance L formed to the surface is as follows.

Here, H is the distance between the subject vehicle and the target area. That is, it is the distance between the subject vehicle and the control object. Substituting these two equations into the system of equations previously obtained, Equation 1 can be formed as follows. Here, d is the distance from the second main surface 124 formed on the first optical axis Ax1 to the exit surface of the last optical member of the first optical unit 120, and D is formed on the second optical axis Ax2 It is the distance from the second main surface 324 to the exit surface of the last optical member of the second optical unit 320.

[Equation 1]

If the specifications of the camera and the specifications of the lamp are known, the rest of the equation can be found except for H, and H can be known when calculating Equation 1 above, so that the distance between the control object and the subject vehicle can be obtained.

Referring to FIG. 10, the first main surface and the second main surface described above may be obtained through a plurality of lenses and light incident from a focal point.

Specifically, when light generated at the first focus P1 located on the optical axis of the optical unit is incident on the last optical member of the optical unit and emitted as parallel light from the first optical member, the light incident on the first optical member is extended. The first main surface may be formed by connecting the points C1 where the line and the line extending the parallel light intersect.

In addition, when light generated at the second focus P2 located on the optical axis of the optical unit is incident on the first optical member of the optical unit and emitted as parallel light from the last optical member, parallel to a line extending the light beam incident on the last optical member A second main surface may be formed by connecting the points C2 where the line extending the light intersects.

Therefore, referring back to FIGS. 2 and 5 again, the first main surface 122 and the second main surface 124 may be formed in the first optical unit 120, and the second optical unit 320 may also be formed. As the first main surface 322 and the second main surface 324 are formed, the distance H between the control object V and the subject vehicle can be calculated.

11 and 12 are views schematically showing a light irradiation unit and an image detection unit of a vehicle lamp system according to an embodiment of the present invention.

Referring to FIGS. 11 and 12, when the specifications of the camera are not known as described above, the light irradiation angle O of at least one light source 112 irradiating light to the target region R and the front image may be derived. The distance H between the control object V and the subject vehicle can be calculated through the position angle S of the target region R that can be performed.

In addition, the calculation method may vary according to whether the target area R corresponds to the inboard area of the vehicle. Accordingly, the area detection unit 600 may determine whether the target area R corresponds to the vehicle inboard position. For example, when the light irradiation angle O of the light irradiation unit 100 generating light in the target area R based on the first optical axis Ax1 is formed inside the vehicle, the target area R is inboard. It can be judged as corresponding to the area. As another example, when the target area R or the control object V is positioned within the angular range by setting a constant angle range on the front image, the target area R or the control object V corresponds to the vehicle inboard area You can judge it as one. In addition, it may be determined in various ways.

Hereinafter, the point where the line extending in the target region R formed in the first optical axis Ax1 direction and the line formed in the direction perpendicular to the first optical axis direction in the light irradiation unit 100 is referred to as the first point PP, The center point of the light irradiation unit 100 is referred to as a first center point CP1 and the center point of the image detection unit 300 is referred to as a second center point CP2. In addition, the light irradiation angle O formed based on the first optical axis Ax1 may be set, and the position angle S of the target region R or the control object V is based on the second optical axis Ax2. Can be set to

)와 제1 지점(PP)에서 제2 중심점(CP2)까지의 길이(

)의 합과 동일하므로 다음과 같이 관계식이 설정될 수 있다.As shown in FIG. 11, when it corresponds to the target area R and the inboard area of the own vehicle, the length L from the first center point CP1 to the second center point CP2 is the first center point CP1 To the first point (PP)

) And the length from the first point (PP) to the second center point (CP2) (

), so the relational expression can be set as follows.

)를 통하여 다음과 같이 관계식이 설정될 수 있다. Accordingly, the distance H from the subject vehicle to be calculated to the control target is the light irradiation angle O of the light irradiation unit 100 irradiating light and the length from the first center point CP1 to the first point PP (

), the relational expression can be set as follows.

A is a value obtained by subtracting the light irradiation angle O formed based on the first optical axis Ax1 from 90 degrees.

)를 통하여 다음과 같이 관계식이 설정될 수 있다.In addition, the distance H from the subject vehicle to be calculated to the target area is the position angle S of the target area R and the length from the second center point CP2 to the first point PP (

), the relational expression can be set as follows.

B is a value obtained by subtracting the position angle S of the target region R formed based on the second optical axis Ax2 from 90 degrees.

Accordingly, it can be expressed as follows.

The above can again be expressed as:

In addition, it can be expressed as Equation 2 again in the trigonometric formula.

[Equation 2]

That is, when the position of the target area R corresponds to the inboard area of the own vehicle, the calculator 700 controls the control object V and the magnetic vehicle through the light irradiation angle O and the position angle S of the target area. The distance H of the liver can be calculated.

)를 통하여 다음과 같이 관계식이 설정될 수 있다. As illustrated in FIG. 12, when the position of the target area R does not correspond to the inboard area of the own vehicle, the distance H from the own vehicle to the target area based on the direction of the first optical axis Ax1 emits light. Light irradiation angle (O) of the irradiated light irradiation unit 100 and the length from the first center point (CP1) to the first point (PP) (

), the relational expression can be set as follows.

Here, A is a value obtained by subtracting the light irradiation angle O formed based on the first optical axis Ax1 from 90 degrees.

)를 통하여 다음과 같이 관계식이 설정될 수 있다.In addition, the distance H from the subject vehicle to be calculated to the target area is the position angle S of the control object R and the length from the first center point CP1 to the second center point CP2 (

), the relational expression can be set as follows.

B is a value obtained by subtracting the position angle S of the target region R formed based on the second optical axis Ax2 from 90 degrees.

Accordingly, it can be expressed as follows.

In addition, it can be expressed as follows according to the trigonometric formula.

Accordingly, the distance H between the control object V and the subject vehicle can be obtained through Equation 3 as follows.

[Equation 3]

That is, when the target area R does not correspond to the inboard area of the own vehicle, the calculator 700 is at 90 degrees and the light irradiation angle O of the light irradiation part 100 that irradiates the target area R with light. The distance H between the control object R and the subject vehicle can be calculated through a value obtained by subtracting the position angle S of the target region R that can be derived from the front image.

Meanwhile, the size of the target region R may also be changed according to the size of the control target V. Accordingly, the target region R may form a plurality of pixel beam patterns, and a plurality of light sources 112 generating light may be provided. Accordingly, the operation unit 700 according to an embodiment of the present invention may have a plurality of distance values between the subject vehicle and the target region through the light irradiation angle and the position angle of the light source 112 formed for each pixel beam pattern PBP. have. In this case, the smallest value among the plurality of distance values may be formed as the distance between the subject vehicle and the control object.

As described above, the vehicle lamp system according to an embodiment of the present invention can calculate the distance H between the subject vehicle and the control object V, so that the amount of light is precisely controlled or the distance value between the control object V and the subject vehicle is It can be effectively used for necessary driver assistance devices (ADAS) and autonomous vehicles.

13 is a flowchart illustrating a method for calculating a distance value of a vehicle lamp system according to an embodiment of the present invention.

Referring to FIG. 13, a method for calculating a distance between a control object and a subject vehicle according to an embodiment of the present invention includes photographing a front (S100), identifying a front object (S110), and determining a control object (S120) , Scanning a plurality of pixel beam patterns (S130), determining whether the pixel beam pattern and the control object position correspond (S140), determining whether to record the image detection unit specification information (S150), computed by Equation (1) It may include a step (S160), determining the position of the control object (S170), calculating the equation (2) (S180) and calculating the equation (3) (S190).

In the step of photographing the front (S100), the image detector 300 photographs the front of the vehicle and extracts the front image, and the step of identifying the front object (S110) is included in the front image by the identification unit 400 It is a step of identifying an object, and the control object determination step S120 is a step of detecting whether the identified object is an object that requires control of a vehicle lamp in driving, such as a person or a vehicle.

Scanning a plurality of pixel beam patterns (S130) includes scanning a plurality of pixel beam patterns (PBPs) to determine a position of the detected control object (V) and at least one pixel beam pattern (PBP) correspondence. to be. As described above, as described above, by controlling the light irradiation control unit, the entire pixel beam pattern of the beam pattern may be sequentially scanned one by one, divided into predetermined regions, or scanned by regions, or by a division method.

The step of determining whether the pixel beam pattern PBP and the position of the control object V correspond (S140) compares the positions of at least one pixel beam pattern PBP and the control object V whose light intensity is controlled according to the scan. Determining whether or not to correspond, and when the position of the controlled at least one pixel beam pattern PBP and the control object V correspond, setting the target area R with the at least one pixel beam pattern PBP .

The step (S150) of determining whether to record the specification information of the image detection unit is a step of determining whether the optical member of the image detection unit 300 photographing the front, the pixel size of the sensor unit 310, or the like is known. These records may be stored in a separate storage device of the image detection unit 300 or a storage device in a vehicle.

When the specification of the image detection unit 300 is recorded, the distance H between the own vehicle and the control object V may be calculated through Equation 1 described above in step S160 of calculating the equation (1).

Even if the specifications of the image detection unit 300 are not recorded, the position of the control object can be determined.

In the step of determining the position of the control object (S170 ), it is determined whether the control object V or the target area R corresponds to the inboard area of the own vehicle. Whether the target area R corresponds to the inboard area of the own vehicle is the light irradiation angle of the light irradiation unit 100 generating light in the target area R based on the first optical axis Ax1 as described above ( When O) is formed inside the vehicle, it may be determined that the target region R is located in the inboard region. As another example, when the target area R or the control object V is located within the angular range by setting a certain angle range on the front image, the target area R or the control object V corresponds to the vehicle inboard area You can judge it as one. In addition, it may be determined in various ways.

When the control object V corresponds to the inboard region of the own vehicle, in step S180 of calculating by Equation 2, the distance H between the self-vehicle and the control object V is calculated by deriving by Equation 2 described above. If the control object (V) does not correspond to the in-board area of the own vehicle, in the step (S190) of calculating by equation (3), the distance (H) between the subject vehicle and the control object (V) is the above equation It can be derived by calculating with 3.

Those of ordinary skill in the art to which the present invention pertains will appreciate that the present invention may be implemented in other specific forms without changing its technical spirit or essential features. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and it should be interpreted that all changes or modified forms derived from the meaning and scope of the claims and equivalent concepts thereof are included in the scope of the present invention. do.

100: light irradiation unit 110: light source unit
120: first optical unit 200: light irradiation control unit
300: image detection unit 310: sensor unit
320: second optical unit 400: identification unit
500: object determination unit 600: area detection unit
700: operation unit

Claims (16)

A light irradiation part forming a beam pattern in the front;
A light irradiation control unit for controlling the light irradiation unit to adjust the amount of light in at least a portion of the beam pattern;
An image detection unit detecting a front image of the own vehicle;
An identification unit for identifying a front object through the detected front image;
An object determination unit determining whether the identified front object is a control object;
An area detector configured to detect a target area corresponding to the position of the control object among the beam pattern areas; And
A vehicle lamp system including a calculation unit for calculating a distance between the control object and the subject vehicle based on the detected target area. According to claim 1,
The light irradiation unit
A light source unit including a plurality of light sources generating light; And
And a first optical unit including a plurality of optical members through which the light enters and exits,
The beam pattern is a vehicle lamp system formed of a plurality of pixel beam patterns formed by light of the plurality of light sources. According to claim 2,
The area detecting unit detects the target area by comparing a beam pattern formed by the plurality of pixel beam patterns and a front image including the control object. According to claim 3,
The region detection unit sequentially controls the light irradiation control unit to sequentially scan the plurality of pixel beam patterns,
The light irradiation control unit changes the light quantity of at least one pixel beam pattern among the light quantity of the plurality of pixel beam patterns according to the sequential scan,
When at least one pixel beam pattern in which the amount of light is changed corresponds to a position of a control object on the front image, at least one pixel beam pattern in which the amount of light is changed is formed as the target area. According to claim 4,
The area detection unit is a vehicle lamp system that scans the plurality of pixel beam patterns from one side to the other side of the beam pattern. According to claim 4,
The area detection unit
The plurality of pixel beam patterns are divided into a plurality of regions and scanned for each region,
A vehicle lamp system that re-scans a pixel beam pattern included in the first area when the control object corresponds to a first area that is at least one of the plurality of areas. The method of claim 6,
The plurality of pixel beam patterns are formed in a matrix shape,
The first region is a vehicle lamp system formed of a plurality of pixel beam patterns located in a horizontal direction among the plurality of pixel beam patterns. The method of claim 6,
The plurality of pixel beam patterns are formed in a matrix shape,
The first region is a vehicle lamp system formed of a plurality of pixel beam patterns located in a longitudinal direction among the plurality of pixel beam patterns. According to claim 4,
The area detection unit scans an unscanned pixel beam pattern area in half among the plurality of pixel beam patterns in a split manner,
A vehicle lamp system that re-scans the pixel beam pattern included in the second region in the divided manner when the second region, which is the region scanned in the divided manner, and the position of the control object correspond. According to claim 4,
The area detection unit controls the light irradiation control unit to form the light amount of the at least one pixel beam pattern in which the light amount is changed to a previous light amount when the position of the control object does not correspond to at least one pixel beam pattern in which the light amount is changed Automotive lamp system. According to claim 1,
The image detection unit is a vehicle lamp system formed of a single camera. According to claim 3,
The image detection unit
A second optical unit to which light is incident; And
And a sensor unit formed of a plurality of pixels for imaging light incident from the second optical unit to form the front image,
At least one of the plurality of pixels is a vehicle lamp system in which light reflected from the target area is formed. The method of claim 12,
The operation unit
Detecting a length of at least one light source forming at least one pixel beam pattern included in the target region among the plurality of light sources in a vertical direction of a first optical axis of the first optical unit,
In the vertical direction of the second optical axis of the second optical unit, the length of at least one pixel to which the light corresponding to the target region is incident is detected,
A vehicle lamp system that calculates a distance between the control object and the subject vehicle based on the detected light source length and the detected pixel length. According to claim 1,
The area detection unit vehicle lamp system for determining whether the target area corresponds to the inboard area of the own vehicle. The method of claim 14,
The operation unit
When the target area corresponds to the inboard area of the subject vehicle, the control object and the control object may be obtained through the irradiation angle of the light irradiation unit irradiating light to the target area and the position angle of the target area that can be derived from the front image. Vehicle lamp system that calculates the distance between own vehicles. The method of claim 14,
The operation unit
When the target area does not correspond to the inboard area of the own vehicle, the irradiation angle of the light irradiation unit irradiating light to the target area and the position angle of the target area that can be derived from the front image are subtracted from 90 degrees. A vehicle lamp system that calculates a distance between the control object and the subject vehicle through a value.

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