KR102348896B1 - Head lamp for vehicle - Google Patents

Abstract

A vehicle headlamp according to an embodiment of the present invention includes a first lens, a plurality of first group light sources emitting light incident to the first lens, a second lens, and emitting light incident to the second lens a plurality of second group light sources and a control unit for controlling luminous intensity of the plurality of first group light sources and the plurality of second group light sources, wherein the control unit comprises: The luminous intensity is controlled to be lower than that of the light source located in the center, and the luminous intensity of the plurality of second group light sources is controlled to be gradually lowered from one side to the other.

Description

Head lamp for vehicle

The present invention relates to a headlamp for a vehicle, and more particularly, to a headlamp for a vehicle that provides lighting to the front of the vehicle.

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

Among the lamps mounted on the vehicle, the head lamp is a lamp including a function to secure the driver's front view during night driving. It is equipped with a function that can irradiate the high beam (upward beam) that is irradiated to a long distance simultaneously or separately.

From the driver's point of view, irradiating the low beam and high beam at the same time is the safest way to drive the vehicle as it can secure the driver's field of vision for both near and far in front of the vehicle at the same time. There is a risk of inducing glare of pedestrians, making it impossible to secure the field of vision during the time required for light adaptation and dark adaptation.

However, if the driver continuously checks an opposing vehicle or pedestrian and repeats the ON/OFF operation of the high beam, the safety of vehicle operation is also impaired, and the driver feels considerable inconvenience.

Complementary to this, the high beam is automatically turned ON/OFF depending on the presence of an oncoming vehicle and/or a preceding vehicle, or the low beam/high beam irradiation angle and/or brightness is controlled according to road conditions (city area, highway, intersection, etc.) Driver assistance systems have been developed and commercialized.

Recently, an adaptive type that detects an opposing vehicle, a preceding vehicle, a pedestrian, etc. from an image image in front of the vehicle, and changes the lamp irradiation angle or turns off the light source so that the high beam is not irradiated where the detected vehicle or pedestrian is located Driving beam (Adaptive drive beam, ADB) technology is developing.

An object of the present invention is to provide a vehicle headlamp that emits a predetermined beam pattern to the front of the vehicle without using a separate reflector.

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 headlamp according to an embodiment of the present invention for solving the above problems includes a first lens, a plurality of first group light sources emitting light incident to the first lens, a second lens, and the second lens a plurality of second group light sources emitting incident light, and a control unit for controlling luminous intensity of the plurality of first group light sources and the plurality of second group light sources, wherein the control unit comprises: one of the plurality of first group light sources; The luminous intensity of the light sources positioned on both sides is controlled to be lower than the luminous intensity of the light sources positioned at the center, and the luminous intensity of the plurality of second group light sources is controlled to be gradually lowered from one side to the other.

The controller may control an average luminous intensity of the plurality of second group light sources to be lower than an average luminous intensity of the plurality of first group light sources.

The first lens irradiates the light emitted from the plurality of first group light sources to the front of the vehicle to form a first beam pattern, and the second lens transmits the light emitted from the plurality of second group light sources to the vehicle. A second beam pattern overlapping at least a portion of the first beam pattern may be formed by irradiating it forward, and the second beam pattern may be formed closer to the vehicle than the first beam pattern.

The second beam pattern may be formed to be eccentric in a right direction compared to the first beam pattern.

In the second beam pattern, the amount of light may decrease toward the right.

The second beam pattern may be formed to be eccentric in a left direction compared to the first beam pattern.

In the second beam pattern, the amount of light may decrease toward the left.

The first lens may form an incident surface on which the light emitted from the plurality of first group light sources is incident, a portion of a front surface of the first lens, and transmit the light incident into the first lens through the incident surface. A first reflective surface that reflects to the rear side of the first lens, an exit surface that forms a part of the front surface of the first lens, and at least a part of the rear surface of the first lens receive the light reflected by the first reflective surface It may include a second reflective surface that reflects toward the emission surface.

Some of the light emitted from the plurality of first group light sources passes through the incident surface and is reflected by the first reflective surface, is reflected by the second reflective surface, and is emitted from the first lens through the exit surface and another part of the light emitted from the plurality of first group light sources passes through the incident surface and is totally reflected on the emission surface, then is reflected by the second reflection surface from the first lens through the exit surface can be released

The second lens forms an incident surface on which the light emitted from the plurality of second group light sources is incident, a front portion of the second lens, and receives the light incident into the second lens through the incident surface. A first reflective surface that reflects to the rear side of the second lens, an exit surface that forms a part of the front surface of the second lens, and at least a part of the rear surface of the second lens receive light reflected by the first reflective surface It may include a second reflective surface that reflects toward the emission surface.

Some of the light emitted from the plurality of second group light sources passes through the incident surface and is reflected by the first reflective surface, is reflected by the second reflective surface, and is emitted from the second lens through the exit surface and another part of the light emitted from the plurality of first group light sources passes through the incident surface and is totally reflected on the emission surface, then is reflected by the second reflection surface from the second lens through the exit surface can be released

Other specific details of the invention are included in the detailed description and drawings.

According to the embodiments of the present invention, there are at least the following effects.

The beam pattern can be irradiated to the front of the vehicle without using a separate reflector.

The effect according to the present invention is not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a diagram schematically illustrating a partial configuration of a vehicle headlamp according to an embodiment of the present invention and a beam pattern emitted by the vehicle headlamp according to an embodiment of the present invention.
FIG. 2 is a table showing a light quantity ratio between each unit beam pattern constituting the beam pattern of FIG. 1 and each unit beam pattern.
3 is a perspective view illustrating the first lens of FIG. 1 .
FIG. 4 is a longitudinal cross-sectional view of the lens of FIG. 3 .
Fig. 5 is a cross-sectional view of the lens of Fig. 3;
6 is a cross-sectional view of a first lens according to another embodiment of the present invention.
7 is a diagram schematically illustrating a correspondence relationship between a plurality of unit beam patterns formed by a first lens and a first group of light sources and a first group of light sources according to an embodiment of the present invention.
8 is a diagram schematically illustrating a correspondence relationship between a plurality of unit beam patterns formed by a second lens and a second group of light sources and a second group of light sources according to an embodiment of the present invention.
9 is a view illustrating a state in which some of a plurality of unit beam patterns formed by a first lens and a first group of light sources according to an embodiment of the present invention are turned off according to an appearance position of an opposing vehicle.
10 is a view illustrating a state in which some of a plurality of unit beam patterns formed by a second lens and a second group of light sources according to an embodiment of the present invention are turned off according to an appearance position of an opposing vehicle.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction 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 these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Further, the embodiments described herein will be described with reference to cross-sectional and/or schematic diagrams that are ideal illustrative views of the present invention. Accordingly, the shape of the illustrative drawing may be modified due to manufacturing technology and/or tolerance. In addition, in each of the drawings shown in the present invention, each component may be enlarged or reduced to some extent in consideration of convenience of description. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining a vehicle headlamp according to an embodiment of the present invention.

1 is a diagram schematically illustrating a partial configuration of a vehicle headlamp according to an embodiment of the present invention and a beam pattern emitted by the vehicle headlamp according to an embodiment of the present invention.

As shown in FIG. 1 , a vehicle headlamp 1 according to an embodiment of the present invention includes a first lens 10 , a plurality of first group light sources 20 ; 21 to 25 , and a second lens 30 . ), a plurality of second group light sources (40; 41 to 45) and a control unit (50).

The plurality of first group light sources 20 are installed adjacent to the first lens 10 , and emit light incident to the first lens 10 . In addition, the plurality of second group light sources 40 are installed adjacent to the second lens 30 , and emit light incident to the second lens 30 .

In the present embodiment, as the plurality of first group light sources 20 , the first light source 21 , the second light source 22 , the third light source 23 , the fourth light source 24 , and the fifth light source 25 are used. The description will be based on an example in which five configured light sources are used, and as the plurality of second group light sources 40 , the sixth light source 41 , the seventh light source 42 , the eighth light source 43 , and the ninth light source 44 . ) and the tenth light source 45 will be described based on an example using five light sources. However, the number of light sources used as the plurality of first group light sources 20 and/or the plurality of second group light sources 40 may vary depending on a required beam pattern or the like. A light emitting diode such as an LED or LD may be used as each of the light sources 21 to 25 and 41 to 45 .

As shown in FIG. 1 , the light emitted from the plurality of first group light sources 20 passes through the first lens 10 and the first beam patterns L1 ~ L5) is formed.

Each of the unit beam patterns L1 to L5 corresponds to the plurality of first group light sources 20 on a one-to-one basis. Specifically, the light emitted from the first light source 21 passes through the first lens 10 to form a first unit beam pattern L1, and the light emitted from the second light source 22 passes through the first lens ( 10) to form a second unit beam pattern L2, and light emitted from the third light source 23 passes through the first lens 10 to form a third unit beam pattern L3, 4 The light emitted from the light source 24 passes through the first lens 10 to form a fourth unit beam pattern L4 , and the light emitted from the fifth light source 25 passes through the first lens 10 . Thus, a fifth unit beam pattern L5 is formed.

Although the irradiation area of each of the unit beam patterns L1 to L5 is clearly shown in FIG. 1 , each of the unit beam patterns L1 to L5 may be formed to partially overlap with the adjacent unit beam patterns. have.

The first lens 10 according to the present exemplary embodiment is the light emitted from the first light source 21 located on the leftmost side of the plurality of first group light sources 20 to the rightmost side of the first beam patterns L1 to L5. The formed first unit beam pattern L1 is formed, and the light emitted from the fifth light source 25 located on the rightmost side of the plurality of first group light sources 20 is used to form the uppermost part of the first beam patterns L1 to L5. In a manner of forming the fifth unit beam pattern L5 formed on the left side, the light emitted from the plurality of first group light sources 20 may be inverted left and right to be emitted toward the front of the vehicle.

On the other hand, as shown in FIG. 1 , the light emitted from the plurality of second group light sources 40 passes through the second lens 30 and a second beam pattern composed of a plurality of unit beam patterns L6 to L10 ( L6 to L10).

Each of the unit beam patterns L6 to L10 corresponds to the plurality of second group light sources 40 on a one-to-one basis. Specifically, the light emitted from the sixth light source 41 passes through the second lens 30 to form a sixth unit beam pattern L6, and the light emitted from the seventh light source 42 passes through the second lens ( 30) to form a seventh unit beam pattern L7, and the light emitted from the eighth light source 43 passes through the second lens 30 to form an eighth unit beam pattern L8, 9 The light emitted from the light source 44 passes through the second lens 30 to form a ninth unit beam pattern L9 , and the light emitted from the tenth light source 45 passes through the second lens 30 . Thus, a tenth unit beam pattern L10 is formed.

Although the irradiation area of each of the unit beam patterns L6 to L10 is clearly shown in FIG. 1 , each of the unit beam patterns L6 to L10 may be formed to partially overlap with an adjacent unit beam pattern. have.

The second lens 30 according to the present embodiment is the light emitted from the sixth light source 41 located at the leftmost side of the plurality of second group light sources 40 and is located at the rightmost side of the second beam patterns L6 to L10. The formed sixth unit beam pattern L6 is formed, and the light emitted from the tenth light source 45 located on the rightmost side of the plurality of second group light sources 40 is used to form the uppermost part of the second beam patterns L6 to L10. In a manner of forming the tenth unit beam pattern L10 formed on the left side, the light emitted from the plurality of second group light sources 40 may be inverted left and right to be emitted toward the front of the vehicle.

1, when the first beam patterns L1 to L5 and the second beam patterns L6 to L10 are irradiated on the screen, the second beam patterns L6 to L10 are the first beam patterns ( It may be formed so as to be eccentric to the lower right of L1 to L5).

On the screen, the second beam patterns L6 to L10 may be formed to partially overlap the first beam patterns L1 to L5 in the vertical direction. That is, as shown in FIG. 1 , among the first beam patterns L1 to L5 , the ninth unit beam pattern L9 and the tenth unit beam pattern L10 of the second beam patterns L6 to L10 are disposed on the upper portions of the first beam patterns L1 to L5 . A first unit beam pattern L1 and a second unit beam pattern L2 may be positioned.

In FIG. 1 , the first beam patterns L1 to L5 and the second beam patterns L6 to L10 are shown to be vertically divided, but the first beam patterns L1 to L5 and the second beam patterns L6 to L10 are It may be implemented so that some unit beam patterns overlap each other.

The first beam patterns L1 to L5 and the second beam patterns L6 to L6 according to the size, shape and illuminance of the beam patterns formed by the first beam patterns L1 to L5 and the second beam patterns L6 to L10 together. L10) may have different degrees of overlap in the horizontal/vertical direction.

When the first beam patterns L1 to L5 and the second beam patterns L6 to L10 are irradiated on the ground in front of the vehicle, the first beam patterns L1 to L5 and the second beam patterns L6 to L10 are Some regions overlap each other, and the second beam patterns L6 to L10 are irradiated to a relatively short distance of the vehicle compared to the first beam patterns L1 to L5, and form a beam pattern deflected to the right from the vehicle center line.

Accordingly, as shown in FIG. 1 in an area where the right side of the vehicle is forced to pass, the second beam patterns L6 to L10 are irradiated so as to be eccentric to the lower right side of the first beam patterns L1 to L5. For vehicles having a configuration A headlamp may be used.

Conversely, in an area where the left side of the vehicle is forced to pass, unlike that shown in FIG. 1 , the second beam patterns L6 to L10 are irradiated so as to be eccentric to the lower left side of the first beam patterns L1 to L5. For vehicles having a configuration A headlamp may be used. For this purpose, unlike shown in FIG. 1 , the second lens 30 and the plurality of second group light sources 40 may be located on the left side of the first lens 10 and the plurality of first group light sources 20 . .

Meanwhile, the amount of light of the plurality of first group light sources 20 and the plurality of second group light sources 40 may be individually controlled by the controller 50 .

FIG. 2 is a table showing a light quantity ratio between each unit beam pattern constituting the beam pattern of FIG. 1 and each unit beam pattern.

The control unit 50 controls the luminous intensity of the light sources 21 to 25 and 41 to 45 of the plurality of first group light sources 20 and the plurality of second group light sources 40 to form unit beam patterns L1 to L10. control the amount of light The controller 50 may control the luminous intensity of the light sources 21 to 25 and 41 to 45 by controlling the current or voltage supplied to each of the light sources 21 to 25 and 41 to 45 .

The first beam patterns L1 to L5 are beam patterns that illuminate a long distance in front of the vehicle, and the second beam patterns L6 to L10 are beam patterns that illuminate a short distance in front of the vehicle. The amount of light should be relatively higher than that of the second beam patterns L6 to L10.

Accordingly, as shown in FIG. 2 , the relative light amount of the unit beam patterns L1 to L5 constituting the first beam patterns L1 to L5 is 90% to 100%, whereas the second beam patterns L6 to The relative amount of light of the unit beam patterns L6 to L10 constituting L10 may be 40% to 80%.

The relative light amounts of the second unit beam pattern L2, the third unit beam pattern L3, and the fourth unit beam pattern L4 positioned at the center of the first beam patterns L1 to L5 are the unit beam patterns L1. ~ L10) can be the highest 100%. To this end, the controller 50 may control the luminous intensity of the second light source 22 , the third light source 23 , and the fourth light source 24 to be higher than that of the other light sources 21 , 25 , 41 to 45 .

In addition, the relative amount of light of the first unit beam pattern L1 and the fifth unit beam pattern L5 positioned on both sides of the first beam patterns L1 to L5 is a second unit beam pattern L2 positioned at the center; Compared to the third unit beam pattern L3 and the fourth unit beam pattern L4, the ratio may be relatively low 90%. To this end, the controller 50 may control the luminous intensity of the first light source 21 and the fifth light source 25 to be lower than that of the second light source 22 , the third light source 23 , and the fourth light source 24 . .

As described above, as the controller 50 controls the luminous intensity of the plurality of first group light sources 20 , the first beam patterns L1 to L5 have the highest light intensity at the center and lower light amounts toward both sides. form a pattern

Meanwhile, as shown in FIG. 2 , in the unit beam patterns L6 to L10 constituting the second beam patterns L6 to L10, the relative light amount of the tenth unit beam pattern L10 formed on the leftmost side is 80% In the right direction, the relative light amount gradually decreases in the order of the ninth unit beam pattern L9, the eighth unit beam pattern L8, the seventh unit beam pattern L7, and the sixth unit beam pattern L6. The relative light amount of the sixth unit beam pattern L6 formed on the rightmost side is 40%.

To this end, the controller 50 controls the luminous intensity of the tenth light source 45 to be lower than the luminous intensity of the first light source 21 and the fifth light source 25 , and the ninth light source 44 and the eighth light source 43 . , the ninth light source 44 , the eighth light source 43 , the seventh light source 42 , and the sixth light source 41 so that the luminous intensity is gradually lowered in the order of , the seventh light source 42 , and the sixth light source 41 . to control

As described above, when the controller 50 controls the luminous intensity of the plurality of second group light sources 40 , the second beam patterns L6 to L10 form a beam pattern in which the amount of light gradually decreases from left to right. do.

In an area where the left side of the vehicle is forced to pass, the second beam pattern (L6 ~ L10) may be configured to be irradiated so as to be eccentric to the lower left side of the first beam pattern (L1 ~ L5), in this case, the second beam pattern ( Among the unit beam patterns L6 to L10 constituting L6 to L10, the relative light amount of the sixth unit beam pattern L6 formed on the rightmost side is 80%, and the seventh unit beam pattern L7 in the left direction; The eighth unit beam pattern L8, the ninth unit beam pattern L9, and the tenth unit beam pattern L10 are sequentially formed to have a relatively low light amount gradually, and the tenth unit beam pattern L10 is formed on the leftmost side. ) can be 40% of the relative light.

Hereinafter, the first lens 10 and the second lens 30 of the vehicle headlamp 1 according to an embodiment of the present invention will be described in detail.

3 is a perspective view illustrating the first lens of FIG. 1 , FIG. 4 is a longitudinal cross-sectional view of the lens of FIG. 3 , and FIG. 5 is a cross-sectional view of the lens of FIG. 3 .

3 and 4, the first lens 10 has an asymmetric shape in the vertical direction and the front-rear direction, and includes a base surface 15, an incident surface 11, a first reflective surface 12, It has a three-dimensional structure including the second reflective surface 13 and the emission surface 14 .

As shown in FIG. 4 , the base surface 15 and the incident surface 11 form a lower surface of the first lens 10 . The incident surface 11 extends from one side of the base surface 15 and forms a reverse inclination downwardly forward with respect to the optical axis X of the first lens 10 .

The plurality of first group light sources 20 are installed adjacent to the incident surface 11 .

Light emitted from the plurality of first group light sources 20 forms first beam patterns L1 , L2 , L3 , L4 , and L5 irradiated to the front of the vehicle through the first lens 10 . The first beam patterns L1, L2, L3, L4, and L5 may be used as adaptive driving beam patterns that individually flicker according to the positions of the oncoming vehicles. In this case, the controller 50 may control the blinking of the plurality of first group light sources 20 individually.

A plurality of first group light sources 20 so that each unit beam pattern L1, L2, L3, L4, L5 constituting the first beam pattern L1, L2, L3, L4, L5 is formed at different positions Each of the light sources 21 to 25 constituting the is arranged so that the focus is formed at different positions.

The plurality of first group light sources 20 are installed to emit light toward the incident surface 11 and the first reflective surface 12 . As a result, it is installed to irradiate light upward with respect to the optical axis X of the first lens 10 .

In this embodiment, an example of forming five unit beam patterns L1, L2, L3, L4, and L5 using five light sources 21, 22, 23, 24, 25 is illustrated, but the unit irradiated to the front The number of light sources may vary according to the number of beam patterns.

In addition, in this embodiment, an example in which a plurality of light sources 21 , 22 , 23 , 24 , and 25 are arranged in a line to extend a plurality of unit beam patterns L1 , L2 , L3 , L4 and L5 is shown. However, a plurality of light sources may be arranged in a plurality of columns to form a plurality of unit beam patterns formed in a plurality of columns.

3 and 4 , the first reflection surface 12 and the emission surface 14 form the front surface of the first lens 10 .

The first reflective surface 12 forms a front lower portion of the lens 10 , and the exit surface 14 forms a front upper portion of the first lens 10 . The first reflective surface 12 and the emission surface 14 may be formed to be interconnected.

3 and 4 , the first reflective surface 12 has a convex shape toward the front of the first lens 10 as a whole. However, the central portion of the first reflective surface 12 has a concave shape in the longitudinal direction.

As shown in FIG. 3 , the first reflective surface 12 includes three curved portions 12a, 12b, and 12c. The inflection portion means a portion in which the shape of the curved surface is changed from an upward slope to a downward slope to form a convex shape, or from a downward slope to an upward slope to form a concave shape.

As shown in FIG. 3 , the first reflective surface 12 includes a first curved portion 12a formed in the central portion of the first reflective surface 12 , and a first curved portion 12a formed on one side of the first curved portion 12a . It includes a second inflection portion 12b and a third inflection portion 12c formed on the other side of the first inflection portion 12a.

The first reflective surface 12 has a concave shape at the first curved portion 12a, and is convex at the second curved portion 12b and the third curved portion 12c positioned on both sides of the first curved portion 12a. take shape

The first reflective surface 12 is coated with a metal layer such as aluminum or chromium having excellent light reflectance, is emitted from the plurality of first group light sources 21, 22, 23, 24, 25 and is produced through the incident surface 11 The light incident into the first lens 10 may be effectively reflected toward the second reflective surface 13 .

As shown in FIG. 4 , the second reflective surface 13 forms the rear surface of the first lens 10 .

The second reflective surface 13 is formed to connect the rear end of the base surface 15 and the upper end of the emission surface 14 , and reflects the light incident on the second reflection surface 13 to the emission surface 14 .

The second reflective surface 13 may also be coated with a metal layer such as aluminum or chromium having excellent light reflectance, so that the light incident on the second reflective surface 13 is effectively reflected toward the emitting surface 14 .

Referring to FIG. 4 , a vertical light path of light emitted from the plurality of first group light sources 20 will be described.

4, the portion (L _A) of the light (L _A, L _B) emitted from the plurality of first group light source 20 into the first lens 10 through the incident surface 11 After being incident, it is reflected by the first reflective surface 12 and is directed to the second reflective surface 13 , is reflected from the second reflective surface 13 again and exits from the first lens 10 through the exit surface 14 . to form a part of the first beam pattern irradiated to the front of the vehicle.

Then, the other part (L _B) of the light (L _A, L _B) emitted from the plurality of first group light source 20 is then incident into the first lens 10 through the incident surface 11, the exit The first beam that is totally reflected from the surface 14 and directed toward the second reflection surface 13, is reflected from the second reflection surface 13 again, is emitted from the lens 10 through the emission surface 14, and is irradiated to the front of the vehicle. form part of the pattern.

For this purpose, the exit surface 14 is the light which proceeds to the first exit surface 14 does not point to the reflecting surface 12 of the light (L _A, L _B) emitted from the plurality of first group light sources 20 It is formed with a curvature capable of total reflection toward the second reflective surface 13 .

As shown in Figure 4, it is reflected by the first reflection surface 12 and the second reflective surface 13 of the light (L _A, L _B) emitted from the plurality of first group light source 20 emitting surface ( _{The light L A} emitted to 14) is mostly irradiated to the front of the vehicle through the lower portion of the emission surface 14 . Then, the light source 20 the light (L _A, L _B) exit surface (14) of claim 2 is reflected by the reflective surface 13 the light (L _B) exiting the exit surface (14) after the total reflection at the one emitted from the is mostly irradiated to the front of the vehicle through the upper portion of the emission surface 14 .

_{Among the light L A} and L _B emitted from the plurality of first group light sources 20 , the light L reflected from the first reflective surface 12 and the second reflective surface 13 and emitted to the emitting surface 14 . _{Since A} ) has a relatively small reflection angle reflected from the first reflective surface 12 , _{a beam pattern formed by the corresponding light LA A} is narrowly formed, thereby forming a beam pattern having a relatively strong luminous intensity.

And, after the total reflection at the exit surface 14 of the light (L _A, L _B) emitted from the plurality of first group light source 20 it is reflected by the second reflection surface 13 which is emitted by the exit surface 14 light (L _B) is formed by a relatively large angle of reflection that is reflected is reflected by the exit surface 14, the beam pattern formed by the light (L _B) wide to form a beam pattern intensity is relatively weak.

A horizontal light path of light emitted from the plurality of first group light sources will be described with reference to FIG. 5 .

5 is a horizontal light path of light reflected by the first reflective surface 12 and the second reflective surface 13 among the light emitted from the plurality of first group light sources 20 and passes through the emitting surface 14 . is schematically shown, and for convenience of explanation, the incident surface 11 and the exit surface 14 are not expressed.

As shown in FIG. 5 , the plurality of first group light sources 21 , 22 , 23 , 24 , 25 are arranged in a line toward the incident surface 11 and the first reflective surface 12 . If necessary, the plurality of first group light sources 21 , 22 , 23 , 24 and 25 may have an arrangement of two or more columns.

The third light source 23 positioned at the center of the plurality of first group light sources 21 , 22 , 23 , 24 , 25 is disposed to face the first curved portion 12a , and the first light source 21 , The second light source 22 , the fourth light source 24 , and the fifth light source 25 may be arranged in a line with the third light source 23 as the center.

The first light source 21 and the second light source 22 may be disposed to face a curved surface between the first curved portion 12a and the third curved portion 12c, and the fourth light source 24 and the fifth light source (25) may be disposed to face the curved surface between the first curved portion (12a) and the second curved portion (12b).

5 , the first reflective surface 12 is concavely formed in the first curved portion 12a, and the light L3 emitted from the third light source 23 is transmitted to the first curved portion 12a. is reflected from the beam pattern is extended to the rear of the third light source 23 and is incident on the central portion of the second reflective surface (13).

The second reflective surface 13 reflects the light L3 emitted from the third light source 23 toward the emission surface 14 and forms a unit beam pattern L3 located at the center of the first beam patterns.

Meanwhile, the light L2 emitted from the second light source 22 positioned to the left of the third light source 23 is incident on the curved surface between the first curved portion 12a and the third curved portion 12c. Since the third curved portion 12c is convex and the first curved portion 12a is concave, the first curved portion 12a and the first curved portion 12a to which the light L2 emitted from the second light source 22 is incident The curved surface between the three inflection portions 12c forms a downward inclination toward the first inflection portion 12a.

Accordingly, the light L2 emitted from the second light source 22 is reflected from the curved surface between the first curved portion 12a and the third curved portion 12c to the left rear and the beam pattern is expanded.

The second reflective surface 13 reflects the light L2 emitted from the second light source 22 and reflected from the first reflective surface 12 to the right and forward, and a unit beam pattern formed by the third light source 23 . A unit beam pattern L2 positioned to the right of L3 is formed.

Meanwhile, the light L1 emitted from the first light source 21 positioned to the left of the second light source 22 is also incident on the curved surface between the first curved portion 12a and the third curved portion 12c. However, the light L1 emitted from the first light source 21 may be incident closer to the third curved portion 12c than the light L2 emitted from the second light source 22 .

The light L1 emitted from the first light source 21 is also reflected to the left rearward on the curved surface between the first curved part 12a and the third curved part 12c, and the beam pattern is expanded. However, the light L1 emitted from the first light source 21 may travel to the left of the light L2 emitted from the second light source 22 . Accordingly, the light L1 emitted from the first light source 21 and reflected from the first reflective surface 12 is greater than the light L2 emitted from the second light source 22 and reflected from the first reflective surface 12 . It may be incident while being deflected to the left from the second reflective surface 13 .

The second reflective surface 13 reflects the light L1 emitted from the first light source 21 and reflected from the first reflective surface 12 to the right front. The second reflective surface 13 is the light L1 emitted from the first light source 21 and reflected from the first reflective surface 12 to the right of the unit beam pattern L2 formed by the second light source 22 . reflect to be positioned. As a result, the light L1 emitted from the first light source 21 and reflected from the first reflective surface 12 is a unit beam pattern positioned to the right of the unit beam pattern L2 formed by the second light source 22 . (L1) is formed.

Meanwhile, the light L4 emitted from the fourth light source 24 positioned on the right side of the third light source 23 is incident on the curved surface between the first curved portion 12a and the second curved portion 12b. Since the second curved portion 12b is convex and the first curved portion 12a is concave, the first curved portion 12a and the first curved portion 12a to which the light L4 emitted from the fourth light source 24 is incident The curved surface between the two inflection portions 12b forms a downward inclination toward the first inflection portion 12a.

Accordingly, the light L4 emitted from the fourth light source 24 is reflected right and rearward on the curved surface between the first curved portion 12a and the second curved portion 12b, and the beam pattern is expanded.

The second reflective surface 13 reflects the light L4 emitted from the fourth light source 24 and reflected from the first reflective surface 12 forward to the left, and a unit beam pattern formed by the third light source 23 . A unit beam pattern L4 positioned to the left of L3 is formed.

Meanwhile, the light L5 emitted from the fifth light source 25 located on the right side of the fourth light source 24 is also incident on the curved surface between the first curved portion 12a and the second curved portion 12b. However, the light L5 emitted from the fifth light source 25 may be incident closer to the second curved portion 12b than the light L4 emitted from the fourth light source 24 .

The light L5 emitted from the fifth light source 25 is also reflected right and rearward on the curved surface between the first curved part 12a and the second curved part 12b, and the beam pattern is expanded. However, the light L5 emitted from the fifth light source 25 may travel to the right of the light L4 emitted from the fourth light source 24 . Accordingly, the light L5 emitted from the fifth light source 25 and reflected from the first reflective surface 12 is greater than the light L4 emitted from the fourth light source 24 and reflected from the first reflective surface 12 . It may be incident while being deflected to the right from the second reflective surface 13 .

The second reflective surface 13 reflects the light L5 emitted from the fifth light source 25 and reflected from the first reflective surface 12 toward the left front. The second reflective surface 13 is located on the left side of the beam pattern L4 formed by the fourth light source 24 in which the light L5 emitted from the fifth light source 25 and reflected from the first reflective surface 12 is located. reflect so that As a result, the light L5 emitted from the fifth light source 25 and reflected from the first reflective surface 12 is a unit beam pattern positioned to the left of the unit beam pattern L4 formed by the fourth light source 24 . (L5) is formed.

Although not shown, similarly to the first reflective surface 12 , three curved portions 12a are formed on a portion of the emission surface 14 where light emitted from the plurality of light sources 21 , 22 , 23 , 24 and 25 is totally reflected. , 12b, 12c) are formed to expand the beam pattern and may be configured to be totally reflected by the second reflective surface 13 .

A plurality of light sources ( 21 , 22 , 23 , 24 , 25 expands the beam pattern formed by the light emitted from it and reflects it to the second reflective surface 13 .

Accordingly, it is possible to more effectively form a beam pattern that spreads widely in front of the vehicle.

In addition, the light L1 and L2 emitted from the first light source 21 and the second light source 22 with the second reflective surface 13 centered on the unit beam pattern L3 formed by the third light source 23 . Since the light L4, L5 emitted from the fourth light source 24 and the fifth light source intersects and is reflected forward to cross, a beam pattern that is more effectively spread out in front of the vehicle can be formed.

In addition, while the optical system of the conventional vehicle headlamp is basically composed of a light source, a lens, and a reflector that reflects the light emitted from the light source toward the lens, the vehicle headlamp 1 according to this embodiment is without a separate reflector. A beam pattern is formed using the plurality of light sources 21 to 25 and the first lens 10 .

Accordingly, time, effort, and cost for designing the reflector can be reduced, and a space for installing the reflector can be omitted, so that a more compact vehicle headlamp is possible.

6 is a cross-sectional view of a first lens according to another embodiment of the present invention.

For convenience of description, parts similar to those of the above-described embodiment use the same reference numerals, and descriptions of parts common to the above-described embodiment will be omitted.

6 , in the first lens 110 according to another embodiment of the present invention, the shape of the first reflective surface 112 is different from that of the first lens 10 according to the above-described embodiment.

The first reflective surface 112 of the first lens 110 according to another exemplary embodiment also includes three curved portions 112a, 112b, and 112c.

As shown in FIG. 6 , the first reflective surface 112 includes a first curved portion 112a formed in the central portion of the first reflective surface 112 , and a first curved portion 112a formed on one side of the first curved portion 112a. Although the second curved portion 112b and the third curved portion 112c formed on the other side of the first curved portion 112a are included, the first reflective surface 112 of the first lens 110 according to the present embodiment is The first curved portion 112a has a convex shape, and the second curved portion 112b and the third curved portion 112c positioned on both sides of the first curved portion 112a have a concave shape.

The first reflective surface 112 is convex at the first curved portion 112a, and the light L3 emitted from the third light source 23 is reflected by the first curved portion 112a and the third light source 23 ), the beam pattern is extended to the rear and is incident on the central portion of the second reflective surface 113 .

The second reflective surface 131 reflects the light L3 emitted from the third light source 23 toward the emitting surface 14 , and a unit beam pattern L3 located at the center of the first beam patterns L1 to L5 . , see FIG. 5).

Meanwhile, the light L2 emitted from the second light source 22 located on the left side of the third light source 23 is incident on the curved surface between the first curved portion 112a and the third curved portion 112c. The third curved portion 112c is concave and the first curved portion 112a is convex. The curved surface between the three inflection portions 112c forms an upward inclination toward the first inflection portion 112a.

Accordingly, the light L2 emitted from the second light source 22 is reflected right and rearward on the curved surface between the first curved portion 112a and the third curved portion 112c, and the beam pattern is expanded.

The second reflective surface 113 is a unit formed by the third light source 23 by reflecting the light L2 emitted from the second light source 22 and reflected from the first reflective surface 112 forward or right forward. A unit beam pattern L2 positioned on the right side of the beam pattern L3 is formed.

Meanwhile, the light L1 emitted from the first light source 21 positioned to the left of the second light source 22 is also incident on the curved surface between the first curved portion 112a and the third curved portion 112c. However, the light L1 emitted from the first light source 21 may be incident closer to the third inflection portion 112c than the light L2 emitted from the second light source 22 .

The light L1 emitted from the first light source 21 is also reflected right and rearward on the curved surface between the first curved part 112a and the third curved part 112c, and the beam pattern is expanded. However, the light L1 emitted from the first light source 21 may travel to the right of the light L2 emitted from the second light source 22 . Accordingly, the light L1 emitted from the first light source 21 and reflected from the first reflective surface 112 is greater than the light L2 emitted from the second light source 22 and reflected from the first reflective surface 112 . The second reflective surface 113 may be incident while being deflected to the right.

The second reflective surface 113 reflects the light L1 emitted from the first light source 21 and reflected from the first reflective surface 112 forward or rightward. The second reflective surface 113 is the light L1 emitted from the first light source 21 and reflected from the first reflective surface 112 to the right of the unit beam pattern L2 formed by the second light source 22 . reflect to be positioned. As a result, the light L1 emitted from the first light source 21 and reflected from the first reflective surface 112 is a unit beam pattern positioned to the right of the unit beam pattern L2 formed by the second light source 22 . (L1) is formed.

Meanwhile, the light L4 emitted from the fourth light source 24 positioned on the right side of the third light source 23 is incident on the curved surface between the first curved portion 112a and the second curved portion 112b. The second curved portion 112b is concave and the first curved portion 112a is convex. The curved surface between the two inflection parts 112b forms an upward inclination toward the first inflection part 112a.

Accordingly, the light L4 emitted from the fourth light source 24 is reflected to the left rearward on the curved surface between the first curved portion 112a and the second curved portion 112b, and the beam pattern is expanded.

The second reflective surface 113 is a unit formed by the third light source 23 by reflecting the light L4 emitted from the fourth light source 24 and reflected from the first reflective surface 112 forward or left forward. A unit beam pattern L4 positioned to the left of the beam pattern L3 is formed.

Meanwhile, the light L5 emitted from the fifth light source 25 located on the right side of the fourth light source 24 is also incident on the curved surface between the first curved portion 112a and the second curved portion 112b. However, the light L5 emitted from the fifth light source 25 may be incident closer to the second curved portion 112b than the light L4 emitted from the fourth light source 24 .

The light L5 emitted from the fifth light source 25 is also reflected to the left rearward on the curved surface between the first curved part 112a and the second curved part 112b, and the beam pattern is expanded. However, the light L5 emitted from the fifth light source 25 may travel to the left of the light L4 emitted from the fourth light source 24 . Accordingly, the light L5 emitted from the fifth light source 25 and reflected from the first reflective surface 112 is greater than the light L4 emitted from the fourth light source 24 and reflected from the first reflective surface 112 . The second reflective surface 113 may be incident while being deflected to the left.

The second reflective surface 113 reflects the light L5 emitted from the fifth light source 25 and reflected from the first reflective surface 112 forward or left. The second reflective surface 113 is the light L5 emitted from the fifth light source 25 and reflected from the first reflective surface 112 to the left of the unit beam pattern L4 formed by the fourth light source 24 . reflect to be positioned. As a result, the light L5 emitted from the fifth light source 25 and reflected from the first reflective surface 112 is a unit beam pattern positioned to the left of the unit beam pattern L4 formed by the fourth light source 24 . (L5) is formed.

Accordingly, in the first lens 10 of the vehicle headlamp 1 according to the above-described embodiment, the second reflective surface 13 is the light L1 emitted from the first light source 21 and the second light source 22 , L2) and the fourth light source 24 and the light L4 and L5 emitted from the fifth light source have a structure that reflects forward so that they intersect, while the first lens of the vehicle headlamp 1 according to the present embodiment Reference numeral 110 denotes that the first reflective surface 112 is the light L1 and L2 emitted from the first light source 21 and the second light source 22 and the light emitted from the fourth light source 24 and the fifth light source ( L4, L5) has a structure that reflects toward the rear so that it intersects.

The first lenses 10 and 110 of the vehicle headlamp 1 according to an embodiment of the present invention have been described above. The second lens 30 has a configuration similar to that of the first lenses 10 and 110 described above, and the optical path between the plurality of second group light sources 40 and the second lens 30 is also similar to that of the plurality of first lenses 30 . Since it is similar to the light path between the group light source 20 and the first lens 10 , a detailed description thereof will be omitted to avoid overlapping description.

7 is a diagram schematically illustrating a correspondence relationship between a plurality of unit beam patterns formed by a first lens and a first group of light sources and a first group of light sources according to an embodiment of the present invention, and FIG. 8 is a diagram of the present invention A diagram schematically illustrating a correspondence relationship between a plurality of unit beam patterns formed by a second lens and a second group of light sources and a second group of light sources according to an embodiment of the present disclosure.

As shown in FIG. 7 , the headlamp 1 for a vehicle according to embodiments of the present invention includes a first beam pattern L1 irradiated to the front of the vehicle using the light emitted from the plurality of first group light sources 20 , L2, L3, L4, and L5 are formed, and second beam patterns L6, L7, L8, L9, and L10 irradiated to the front of the vehicle are formed by using the light emitted from the plurality of second group light sources 40 . .

Each of the unit beam patterns L1, L2, L3, L4, and L5 of the first beam patterns L1, L2, L3, L4, and L5 may be formed to partially overlap with the adjacent unit beam patterns, and the second beam Each of the unit beam patterns L6, L7, L8, L9, and L10 of the patterns L6, L7, L8, L9, and L10 may be formed to partially overlap an adjacent unit beam pattern.

7 , an arrangement of unit beam patterns L1, L2, L3, L4, L5, L6, L7, L8, L9, and L10 by the vehicle headlamp 1 according to embodiments of the present invention The order is reversed in the left and right direction from the arrangement order of the light sources 21 , 22 , 23 , 24 , 25 , 41 , 42 , 43 , 44 , 45 .

As described above in the description of the first lenses 10 and 110, depending on the embodiment, this is the first light source 21 and the second light source ( This is because the light L1 and L2 emitted from 22 ) and the light L4 and L5 emitted from the fourth light source 24 and the fifth light source 25 cross each other and are reflected. The second lens 30 also includes the light L6 and L7 emitted from the sixth light source 41 and the seventh light source 42 on the second reflective surface or the first reflective surface, and the ninth light source 44 and the tenth light source. This is because the light (L9, L10) emitted from (45) is reflected so that it intersects.

Meanwhile, FIG. 9 is a view showing a state in which some of the plurality of unit beam patterns formed by the first lens and the first group light sources according to an embodiment of the present invention are turned off according to the appearance position of the opposing vehicle, 10 is a view illustrating a state in which some of a plurality of unit beam patterns formed by a second lens and a second group of light sources according to an embodiment of the present invention are turned off according to an appearance position of an opposing vehicle.

9 and 10 , the headlamp 1 for a vehicle according to an embodiment of the present invention may use a plurality of unit beam patterns L1 to L10 as an adaptive driving beam pattern.

9 and 10 , the headlamp 1 for a vehicle according to an embodiment of the present invention has unit beam patterns L2 and L10 that illuminate a corresponding area when an oncoming vehicle is positioned in front of the vehicle. The control unit 50 turns off the light sources 22 and 45 of the corresponding unit beam patterns L2 and L10 so that the light is turned off. Then, when the opposing vehicle disappears from the corresponding area, the control unit 50 turns on the light sources 22 and 45 of the corresponding unit beam patterns L2 and L10 so that the unit beam patterns L2 and L10 illuminating the corresponding area are turned on again. do.

In a similar manner, the control unit 50 controls the plurality of first group light sources 20 and the plurality of second group light sources so that the plurality of unit beam patterns L1 to L10 each illuminate different areas blink according to the position of the opposing vehicle. (40) can be individually controlled blinking.

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. 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 all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

1: Vehicle headlamps
10, 110: first lens
11: entrance face
12, 112: first reflective surface
12a, 12b, 12c, 112a, 112b, 112c: inflection
13, 113: second reflective surface
14: exit side
15: base surface
20 (21, 22, 23, 34, 25): first group light source
30: second lens
40 (41, 42, 43, 44, 45): second group light source
50: control unit

Claims (11)

a first lens;
a plurality of first group light sources emitting light incident to the first lens;
a second lens;
a plurality of second group light sources emitting light incident to the second lens; and
a control unit for controlling the luminous intensity of the plurality of first group light sources and the plurality of second group light sources,
The control unit is
Controlling the luminous intensity of the light sources located on both sides of the plurality of first group light sources to be lower than the luminous intensity of the light sources located in the center,
Controlling the luminous intensity of the plurality of second group light sources to be gradually lowered from one side to the other side,
and controlling the average luminous intensity of the plurality of second group light sources to be lower than the average luminous intensity of the plurality of first group light sources. delete a first lens;
a plurality of first group light sources emitting light incident to the first lens;
a second lens;
a plurality of second group light sources emitting light incident to the second lens; and
a control unit for controlling the luminous intensity of the plurality of first group light sources and the plurality of second group light sources,
The control unit is
Controlling the luminous intensity of the light sources located on both sides of the plurality of first group light sources to be lower than the luminous intensity of the light sources located in the center,
controlling the luminous intensity of the plurality of second group light sources to be gradually lowered from one side to the other side,
The first lens forms a first beam pattern by irradiating the light emitted from the plurality of first group light sources to the front of the vehicle,
The second lens irradiates the light emitted from the plurality of second group light sources to the front of the vehicle to form a second beam pattern that at least partially overlaps the first beam pattern,
The second beam pattern is formed in a shorter distance of the vehicle than the first beam pattern, the vehicle headlamp. 4. The method of claim 3,
The second beam pattern is formed to be eccentric to the right compared to the first beam pattern, the vehicle headlamp. 5. The method of claim 4,
and the amount of light of the second beam pattern decreases in a right direction. 4. The method of claim 3,
The second beam pattern is formed to be eccentric in a left direction compared to the first beam pattern, the vehicle head lamp. 7. The method of claim 6,
and the amount of light of the second beam pattern decreases in a left direction. According to claim 1,
The first lens is
an incident surface on which the light emitted from the plurality of first group light sources is incident;
a first reflective surface forming a part of the front surface of the first lens and reflecting the light incident into the first lens through the incident surface toward the rear side of the first lens;
an exit surface forming a portion of the front surface of the first lens;
and a second reflective surface forming at least a portion of a rear surface of the first lens and reflecting the light reflected by the first reflective surface toward the emitting surface. 9. The method of claim 8,
Some of the light emitted from the plurality of first group light sources,
After passing through the incident surface and being reflected by the first reflective surface, it is reflected by the second reflective surface and emitted from the first lens through the emitting surface,
Another part of the light emitted from the plurality of first group light sources,
After passing through the incident surface and being totally reflected by the exit surface, the vehicle head lamp is reflected by the second reflection surface and emitted from the first lens through the exit surface. According to claim 1,
The second lens,
an incident surface on which the light emitted from the plurality of second group light sources is incident;
a first reflective surface forming a portion of the front surface of the second lens and reflecting light incident into the second lens through the incident surface toward a rear side of the second lens;
an exit surface forming a portion of the front surface of the second lens;
and a second reflective surface forming at least a portion of a rear surface of the second lens and reflecting the light reflected by the first reflective surface toward the emitting surface. 11. The method of claim 10,
Some of the light emitted from the plurality of second group light sources,
After passing through the incident surface and being reflected by the first reflective surface, it is reflected by the second reflective surface and emitted from the second lens through the emitting surface,
Another part of the light emitted from the plurality of first group light sources,
After passing through the incident surface and being totally reflected on the exit surface, the vehicle head lamp is reflected by the second reflection surface and emitted from the second lens through the exit surface.

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