Lamp for vehicle

Abstract

Disclosed is a lamp for a vehicle including a first light source unit including a plurality of first light source parts, and disposed on one side in a leftward/rightward direction, a second light source unit including a plurality of second light source parts, and disposed on an opposite side to the first light source unit, a first total reflection lens in which a plurality of first lens structures are integrally formed, and disposed on one side with respect to the leftward/rightward direction, a second total reflection lens, in which a plurality of second lens structures are integrally formed, and disposed on an opposite side to the first light source unit, and an output lens disposed on a front side of the first total reflection lens and the second total reflection lens.

Claims

1. A lamp for a vehicle, comprising: a first light source unit including a plurality of first light source parts and disposed on a first side of the vehicle in a leftward/rightward direction; a second light source unit including a plurality of second light source parts and disposed on a second side of the vehicle opposite to the first side; a first total reflection lens configured to condense light irradiated from the plurality of first light source parts and output the light forward, in which a plurality of first lens structures is integrally formed and disposed on the first side of the vehicle; a second total reflection lens, in which a plurality of second lens structures configured to condense light irradiated from the plurality of second light source parts and output the light forward are integrally formed and disposed on the second side of the vehicle; and an output lens disposed on a front side of the first total reflection lens and the second total reflection lens, wherein each of the plurality of first lens structures includes a first cutoff part having a step at a lower end of a first light output surface disposed on a front side of each first lens structure, wherein each of the plurality of second lens structures includes a second cutoff part disposed at a lower end of a second light output surface disposed on the front side of each second lens structure, and wherein the first cutoff part and the second cutoff part are configured to collectively form a cutoff line of a low beam pattern, wherein each of the plurality of first lens structures has a lower surface facing downwardly and including a first inclined surface disposed inclined upwardly toward the front side of each first lens, and the first cutoff part is located at a front end portion of the first inclined surface, and wherein each of the plurality of second lens structures has a lower surface facing downwardly and including a second inclined surface inclined upwardly toward the front side of each second lens, and the second cutoff part is disposed at a front end portion of the second inclined surface.

2. The lamp of claim 1, wherein the output lens includes: a first output lens part including (1) a first input surface, to which light output from the first total reflection lens is input and (2) a first output surface, from which the light input to the first input surface is output; and a second output lens part including (1) a second input surface, to which light output from the second total reflection lens is input and (2) a second output surface, from which the light input to the second input surface is output, and wherein the first input surface and the second input surface have different shapes.

3. The lamp of claim 2, wherein: a first light distribution pattern is formed by the light output from the first output lens part, a second light distribution pattern is formed by the light output from the second output lens part and is different from the first light distribution pattern, and the first light distribution pattern and the second light distribution pattern overlap with each other to form a low beam pattern.

4. The lamp of claim 1, wherein a number of the plurality of second lens structures is greater than that of the plurality of first lens structures.

5. The lamp of claim 2, wherein: each of the plurality of first lens structures includes: a first light input part, to which light is input; and a first body part disposed on a front side of the first light input part, wherein the first light output surface is disposed on a front side of the first body part, and the first body part includes the first inclined surface.

6. The lamp of claim 5, wherein: the plurality of first light output surfaces respectively provided in the plurality of first lens structures is integrally formed and defines a lens light output surface, and the lens light output surface has a shape, in which a leftward/rightward cross-sectional shape of the lens light output surface is curved to be concave in a direction toward the first light source unit.

7. The lamp of claim 6, wherein, among the plurality of first lens structures included in the first total reflection lens, the first lens structure disposed at a center with respect to the leftward/rightward direction is defined as a central lens structure, and the first lens structure disposed on opposite sides of the central lens structure are defined as a plurality of side lens structures, a plurality of paths of light located in the plurality of side lens structures, is defocused on the lens light output surface.

8. The lamp of claim 6, wherein a central axis of the first total reflection lens is spaced apart from a focus located in the first output lens part.

9. The lamp of claim 5, wherein, on a cross-section perpendicular to a central axis of the first lens structure, the first light output surface is inclined upwardly toward the first light input part.

10. The lamp of claim 2, wherein: the second lens structure includes: a second light input part, to which the light is input; and a second body part disposed on a front side of the second light input part, wherein the second light output surface is disposed on a front side of the second body part, the second body part includes the second inclined surface.

11. The lamp of claim 10, wherein the second light output surface is inclined upwardly toward the second light input part.

12. A lamp for a vehicle, comprising: a first light source unit including a plurality of first light source parts and disposed on a first side of the vehicle in a leftward/rightward direction; a second light source unit including a plurality of second light source parts and disposed on a second side of the vehicle opposite to the first side; a first total reflection lens configured to condense light irradiated from the plurality of first light source parts and output the light forward, in which a plurality of first lens structures is integrally formed and disposed on the first side of the vehicle; a second total reflection lens, in which a plurality of second lens structures configured to condense light irradiated from the plurality of second light source parts and output the light forward are integrally formed and disposed on the second side of the vehicle; and an output lens disposed on a front side of the first total reflection lens and the second total reflection lens, wherein each of the plurality of first lens structures includes a first cutoff part having a step at a lower end of a first light output surface disposed on a front side of each first lens structure, wherein each of the plurality of second lens structures includes a second cutoff part disposed at a lower end of a second light output surface disposed on the front side of each second lens structure, wherein the first cutoff part and the second cutoff part are configured to collectively form a cutoff line of a low beam pattern, wherein the output lens includes: a first output lens part including (1) a first input surface, to which light output from the first total reflection lens is input and (2) a first output surface, from which the light input to the first input surface is output; and a second output lens part including (1) a second input surface, to which light output from the second total reflection lens is input and (2) a second output surface, from which the light input to the second input surface is output, wherein the first input surface and the second input surface have different shapes, wherein the second lens structure includes: a second light input part, to which the light is input; and a second body part disposed on a front side of the second light input part, wherein the second light output surface is disposed on a front side of the second body part, wherein the second body part includes a second inclined surface inclined upwardly on a lower surface of the second body part, wherein the second cutoff part is disposed at a front end of the second inclined surface, wherein the second light output surface is inclined upwardly toward the second light input part, wherein the plurality of second lens structures is arranged in the leftward/rightward direction, and wherein when an angle, at which the second light output surface is tilted on a cross-section passing through a central axis of the second lens structure and being perpendicular to a ground surface, is defined as a tilting angle, the tilting angles of the second light output surfaces provided in the plurality of second lens structures become smaller as they go from ends with respect to the leftward/rightward direction to opposite ends with respect to the leftward/rightward direction.

13. The lamp of claim 2, wherein: the first input surface is convex in the leftward/rightward direction, and the first output surface is convex in the leftward/rightward direction.

14. The lamp of claim 2, wherein: the second input surface is curved inwardly in the leftward/rightward direction, and the second output surface is curved outwardly in the leftward/rightward direction.

15. The lamp of claim 14, wherein the first output surface and the second output surface are disposed continuously.

16. A lamp for a vehicle, comprising: a first light source unit including a plurality of first light source parts and disposed on a first side of the vehicle in a leftward/rightward direction; a second light source unit including a plurality of second light source parts and disposed on a second side of the vehicle opposite to the first side; a first total reflection lens configured to condense light irradiated from the plurality of first light source parts and output the light forward, in which a plurality of first lens structures is integrally formed and disposed on the first side of the vehicle; a second total reflection lens, in which a plurality of second lens structures configured to condense light irradiated from the plurality of second light source parts and output the light forward are integrally formed and disposed on the second side of the vehicle; and an output lens disposed on a front side of the first total reflection lens and the second total reflection lens, wherein each of the plurality of first lens structures includes a first cutoff part having a step at a lower end of a first light output surface disposed on a front side of each first lens structure, wherein each of the plurality of second lens structures includes a second cutoff part disposed at a lower end of a second light output surface disposed on the front side of each second lens structure, wherein the first cutoff part and the second cutoff part are configured to collectively form a cutoff line of a low beam pattern, wherein the output lens includes: a first output lens part including (1) a first input surface, to which light output from the first total reflection lens is input and (2) a first output surface, from which the light input to the first input surface is output; and a second output lens part including (1) a second input surface, to which light output from the second total reflection lens is input and (2) a second output surface, from which the light input to the second input surface is output, wherein the first input surface and the second input surface have different shapes, wherein the second input surface has a rear side curved in a direction toward the second total reflection lens, wherein the second output surface is curved in a shape corresponding to the second input surface, wherein light guided by the plurality of second lens structures forms a plurality of vertical focuses in a vertical direction, and wherein the plurality of vertical focuses is curved along a direction in which the second output surface is curved.

17. The lamp of claim 16, wherein the plurality of second cutoff parts provided in the plurality of second lens structures is respectively located in a plurality of positions corresponding to the plurality of vertical focuses.

18. The lamp of claim 17, wherein the second cutoff part is disposed on a front side of a focus formed by the second output lens part.

19. The lamp of claim 14, wherein a path of light formed by at least some of the plurality of second lens structures is asymmetrical in the leftward/rightward direction with respect to central axes of the plurality of second lens structures.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The above and other objects, features and advantages of the present disclosure will be more apparent from the following detailed description taken in conjunction with the accompanying drawings:

(2) FIG. 1 is a top view illustrating a lamp for a vehicle according to an embodiment of the present disclosure;

(3) FIG. 2 is a side view illustrating a lamp for a vehicle according to an embodiment of the present disclosure;

(4) FIG. 3 is a top view illustrating a first total reflection lens and a first output lens part according to an embodiment of the present disclosure;

(5) FIG. 4 is a side view illustrating a first total reflection lens and a first output lens part according to an embodiment of the present disclosure;

(6) FIG. 5 is a perspective view illustrating a first total reflection lens and a first output lens part according to an embodiment of the present disclosure;

(7) FIG. 6 is an enlarged perspective view of a step part of FIG. 5;

(8) FIG. 7 is a side view illustrating a side surface of a first lens structure according to an embodiment of the present disclosure;

(9) FIG. 8 is a front view of a first lens structure illustrated in FIG. 7 as viewed from a first light input part;

(10) FIG. 9 is a perspective view illustrating a second total reflection lens and a second output lens part according to an embodiment of the present disclosure;

(11) FIG. 10 is a top view illustrating a second total reflection lens and a second output lens part according to an embodiment of the present disclosure;

(12) FIG. 11 is a side view illustrating a second lens structure and a second output lens part that is located at an end that is closest to one side according to an embodiment of the present disclosure;

(13) FIG. 12 is a side view illustrating a second lens structure and a second output lens part positioned at an end that is closest to an opposite end according to an embodiment of the present disclosure;

(14) FIG. 13 is an enlarged side view of a part of FIG. 11, and is a view illustrating a positional relationship between a second output lens part and a second cutoff part;

(15) FIG. 14 is a top view illustrating a second lens structure and a second output lens part that is located at an end that is closest to one side according to an embodiment of the present disclosure;

(16) FIG. 15 is a side view illustrating a second lens structure and a second output lens part that is located third from an end on one side according to an embodiment of the present disclosure;

(17) FIG. 16 is a view illustrating a second output lens part and a plurality of second lens structures, and a light distribution result according to an embodiment of the present disclosure;

(18) FIG. 17 is an image illustrating a stepped part of a first light distribution pattern by a lamp for a vehicle according to an embodiment of the present disclosure;

(19) FIG. 18 is an image illustrating a first light distribution pattern by the lamp for a vehicle according to the embodiment of the present disclosure;

(20) FIG. 19 is an image illustrating a second light distribution pattern of a lamp for a vehicle according to the embodiment of the present disclosure;

(21) FIG. 20 is an image illustrating a low beam pattern, in which a first light distribution pattern and a second light distribution pattern overlap each other, by a lamp for a vehicle according to an embodiment of the present disclosure; and

(22) FIG. 21 is an image illustrating a light distribution pattern that is formed on a road surface by a lamp for a vehicle according to an embodiment of the present disclosure.

DETAILED DESCRIPTION

(23) Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings.

(24) First, the embodiments described below are suitable embodiments for understanding the technical features of a lamp for a vehicle of the present disclosure. However, the present disclosure is not limited to the embodiments described below or the technical features of the present disclosure are limited by the embodiments described, and various modifications may be implemented within the technical scope of the present disclosure.

(25) FIG. 1 is a top view illustrating a lamp for a vehicle according to an embodiment of the present disclosure, FIG. 2 is a side view illustrating a lamp for a vehicle according to an embodiment of the present disclosure, FIG. 3 is a top view illustrating a first total reflection lens and a first output lens part according to an embodiment of the present disclosure, FIG. 4 is a side view illustrating a first total reflection lens and a first output lens part according to an embodiment of the present disclosure, FIG. 5 is a perspective view illustrating a first total reflection lens and a first output lens part according to an embodiment of the present disclosure, FIG. 6 is an enlarged perspective view of a step part of FIG. 5, FIG. 7 is a side view illustrating a side surface of a first lens structure according to an embodiment of the present disclosure, and FIG. 8 is a front view of a first lens structure illustrated in FIG. 7 as viewed from a first light input part.

(26) FIG. 9 is a perspective view illustrating a second total reflection lens and a second output lens part according to an embodiment of the present disclosure, FIG. 10 is a top view illustrating a second total reflection lens and a second output lens part according to an embodiment of the present disclosure, FIG. 11 is a side view illustrating a second lens structure and a second output lens part that is located at an end that is closest to one side according to an embodiment of the present disclosure, FIG. 12 is a side view illustrating a second lens structure and a second output lens part positioned at an end that is closest to an opposite end according to an embodiment of the present disclosure, FIG. 13 is an enlarged side view of a part of FIG. 11, and is a view illustrating a positional relationship between a second output lens part and a second cutoff part, FIG. 14 is a top view illustrating a second lens structure and a second output lens part that is located at an end that is closest to one side according to an embodiment of the present disclosure, FIG. 15 is a side view illustrating a second lens structure and a second output lens part that is located third from an end on one side according to an embodiment of the present disclosure, and FIG. 16 is a view illustrating a second output lens part and a plurality of second lens structures, and a light distribution result according to an embodiment of the present disclosure.

(27) FIG. 17 is an image illustrating a stepped part of a first light distribution pattern by a lamp for a vehicle according to an embodiment of the present disclosure, FIG. 18 is an image illustrating a first light distribution pattern by the lamp for a vehicle according to the embodiment of the present disclosure, FIG. 19 is an image illustrating a second light distribution pattern of a lamp for a vehicle according to the embodiment of the present disclosure, FIG. 20 is an image illustrating a low beam pattern, in which a first light distribution pattern and a second light distribution pattern overlap each other, by a lamp for a vehicle according to an embodiment of the present disclosure, and FIG. 21 is an image illustrating a light distribution pattern that is formed on a road surface by a lamp for a vehicle according to an embodiment of the present disclosure.

(28) Referring to FIGS. 1 to 16, a lamp 10 for a vehicle according to the embodiment of the present disclosure includes a first light source unit 100, a second light source unit 200, a first total reflection lens 300, a second total reflection lens 400, and an output lens 500. For reference, in FIGS. 1 to 16, D11 represents a forward direction and D12 represents a rearward direction. D21 represents an in-board direction of the vehicle toward one end, and D22 represents an out-board direction of the vehicle toward an opposite end. D31 represents an upward direction, and D32 represents a downward direction.

(29) The first light source unit 100 includes a plurality of first light source parts 110, and is disposed on one side in a leftward/rightward direction. Furthermore, the second light source unit 200 includes a plurality of second light source parts 210a, 210b, 210c, 210d, and 210e, and is disposed on an opposite side to the first light source unit 100.

(30) A plurality of first light source parts 110 may be arranged in the leftward/rightward direction. Furthermore, the plurality of second light source parts 210a, 210b, 210c, 210d, and 210e may be arranged in the leftward/rightward direction. The first light source parts 110 and the second light source parts 210a, 210b, 210c, 210d, and 210e may be elements or devices that may emit light. For example, the first light source parts 110 and the second light source parts 210a, 210b, 210c, 210d, and 210e may be provided as light emitting diodes (hereinafter, referred to as LEDs). Furthermore, the first light source parts 110 and the second light source parts 210a, 210b, 210c, 210d, and 210e may be mounted on a board part (not illustrated), such as a printed circuit board.

(31) In the first total reflection lens 300, a plurality of first lens structures 300a that condense light irradiated from the plurality of first light source parts 110 and output the light forward are formed, and are disposed on one side with respect to the leftward/rightward direction.

(32) Furthermore, each of the first lens structures 300a may include a first cutoff part 330 having a step at a lower end of a first light output surface 321a that is formed (or disposed) on a front side.

(33) Furthermore, the plurality of first lens structures 300a may be integrally formed to form one first total reflection lens 300.

(34) In the second total reflection lens 400, a plurality of second lens structures 400a, 400b, 400c, 400d, and 400e that condense light irradiated from the plurality of second light source parts 210a, 210b, 210c, 210d, and 210e and output the light forward are formed, and are disposed on an opposite side to the first light source unit 100 with respect to the leftward/rightward direction.

(35) Furthermore, each of the second lens structures 400a, 400b, 400c, 400d, and 400e may include a second cutoff part 430a, 430b, 430c, 430d, and 430e formed at a lower end of a second light output surface 421a, 421b, 421c, 421d, and 421e that is formed on a front side.

(36) Here, the first cutoff parts 330 and the second cutoff parts 430a, 430b, 430c, 430d, and 430e are provided to collectively form a cutoff line of a low beam pattern.

(37) Specifically, the first lens structure 300a may serve to condense light irradiated from the first light source part 110 and guide the light to a front side, and may also serve to form a cutoff line of the low beam pattern by the first cutoff part 330. Specifically, the first lens structure 300a may be formed to condense light through total internal reflection, but may form a cutoff line by deforming a partial shape of the body. Accordingly, the cutoff line may be formed while not having a separate shield member.

(38) Furthermore, the plurality of first lens structures 300a may be integrally formed while being disposed in the leftward/rightward direction to form one first total reflection lens 300. Accordingly, it is possible to improve an optical efficiency by simplifying an assembly process and minimizing an assembly tolerance through simplification of components.

(39) Furthermore, the second lens structures 400a, 400b, 400c, 400d, and 400e may serve to condense light irradiated from the second light source parts 210a, 210b, 210c, 210d, and 210e to guide the light forward, and may also serve to form a cutoff line of the low beam pattern by the second cutoff parts 430a, 430b, 430c, 430d, and 430e. Specifically, the second lens structures 400a, 400b, 400c, 400d, and 400e may be formed to condense light through total internal reflection, but may form a cutoff line by deforming a partial shape of the body. Accordingly, the cutoff line may be formed while not having a separate shield member.

(40) Furthermore, the plurality of second lens structures 400a, 400b, 400c, 400d, and 400e may be disposed in the leftward/rightward direction, and may be integrally formed to form one second total reflection lens 400. Accordingly, it is possible to improve an optical efficiency by simplifying an assembly process and minimizing an assembly tolerance through simplification of components.

(41) Meanwhile, the output lens 500 is disposed on a front side of the first total reflection lens 300 and the second total reflection lens 400.

(42) Specifically, the output lens 500 may include a first output lens part 510 and a second output lens part 520.

(43) The first output lens part 510 may include a first input surface 511, to which the light output from the first total reflection lens 300 is input, and a first output surface 512, from which the input light is output.

(44) Specifically, the first input surface 511 may be formed as a spherical surface that is formed to be convex in a direction toward the first total reflection lens 300. Furthermore, the first output surface 512 may be formed as a spherical surface that is formed to be convex toward a front side. For example, the first input surface 511 and the first output surface 512 may be symmetrical in the leftward/rightward direction with respect to an optical axis of the first output lens part 510.

(45) The second output lens part 520 may include a second input surface 521, to which light output from the second total reflection lens 400 is input, and a second output surface 522, from which the input light is output. Furthermore, the first input surface 511 and the second input surface 521 may be formed in different shapes.

(46) Specifically, the second input surface 521 may be formed to be curved to become closer to the second total reflection lens 400 from one end to an opposite end with respect to the leftward/rightward direction. Accordingly, the second input surface 521 and the second output lens part 520 may be formed to be asymmetrical with respect to the leftward/rightward direction with respect to an optical axis of the second output lens part 520.

(47) Here, the second output lens part 520 may be formed to extend in the leftward/rightward direction to cover all the plurality of second lens structures 400a, 400b, 400c, 400d, and 400e. In this way, the first input surface 511 and the second input surface 521 may be formed in different shapes.

(48) Furthermore, the first output surface 512 may be formed in a shape that is convex forward. Furthermore, the first output surface 512 may be symmetrical with respect to an optical axis of the first output lens part 510.

(49) Furthermore, the second output surface 522 may be formed to be curved to become closer to the second total reflection lens 400 from one end to an opposite end with respect to the leftward/rightward direction. Accordingly, the second output surface 522 may be formed to be asymmetrical with respect to the leftward/rightward direction with respect to an optical axis of the second output lens part 520.

(50) Here, the first output surface 512 and the second output surface 522 are formed in different shapes, but may be continuously formed without no step in the left and right direction. Because the first output surface 512 and the second output surface 522 that are disposed on a front side and form an exterior of the lamp 10 for a vehicle are continuously formed, the lamp 10 for a vehicle according to the present disclosure may provide a design-friendly effect by minimizing a sense of disconnection between light distribution patterns having different characteristics.

(51) Meanwhile, a first light distribution pattern may be formed by the light output from the first output lens part 510 (see FIG. 18). Furthermore, a second light distribution pattern having different characteristics from those of the first light distribution pattern may be formed by the light output from the second output lens part 520 (see FIG. 19). Furthermore, the first light distribution pattern and the second light distribution pattern may overlap with each other to form a low beam pattern (see FIG. 20).

(52) In the specification, the difference in characteristics of the light distribution pattern means that the light distribution characteristics of the first light distribution pattern and the second light distribution pattern and the projected pattern images are different. This may be implemented by the difference in characteristics and shapes of the first and second total reflection lenses and the first and second output lens parts.

(53) For example, the first light distribution pattern may be a long-distance light distribution pattern (hot zone) to secure a field of view of a central area on a front side. Furthermore, the second light distribution pattern may be a light distribution pattern (wide zone) to secure a field of view of the surrounding area on a front side and to secure visibility during turning.

(54) Meanwhile, a number of the second lens structures 400a, 400b, 400c, 400d, and 400e may be greater than that of the first lens structures 300a. As in an embodiment illustrated as an example, the number of the first lens structures 300a may be three, and the number of the second lens structures 400a, 400b, 400c, 400d, and 400e may be five, but the numbers of first and second lens structures are not limited thereto.

(55) Specifically, the first light distribution pattern formed by the first lens structure 300a may be designed to have a light intensity that is higher than or equal to a specific light intensity (e.g., a maximum of 30,000 cd or higher) to satisfy a light distribution performance. To this end, a plurality of light distribution patterns may be provided.

(56) Furthermore, the second light distribution pattern formed by the plurality of second lens structures 400a, 400b, 400c, 400d, and 400e may be designed to spread by a specific angle or more (e.g., about 40 degrees or more) in the leftward/rightward direction to satisfy the light distribution performance. To implement the spreading characteristics, the plurality of second lens structures 400a, 400b, 400c, 400d, and 400e may be arranged in the leftward/rightward direction. Accordingly, it is possible to secure a turning visibility.

(57) Furthermore, because the light distribution patterns by the second lens structures 400a, 400b, 400c, 400d, and 400e have the characteristics of spreading leftward and rightward, a larger number of first lens structures 300a may be provided for a spreading design.

(58) Meanwhile, hereinafter, the first total reflection lens 300 will be described in detail with reference to FIGS. 3 to 8.

(59) Each of the plurality of first lens structures 300a may include a first light input part 310, of which light is input, and a first body part 320 that is disposed on a front side of the first light input part 310, and in which a first light output surface 321a is formed on a front side.

(60) Furthermore, the first body part 320 may include a first inclined surface 323 that is formed on a lower surface thereof to be inclined upward as it goes to a front side. Furthermore, the first cutoff part 330 may be formed at a front end of the first inclined surface 323.

(61) Specifically, the first lens structure 300a may be a total internal reflection (TIR) lens that guides and condenses input light by total internal reflection. The first light input part 310 may include a central light input surface 311 and a side light input surface 312, to which light is input, and a total reflection surface 313, from which the input light is totally reflected. In the illustrated embodiment, H denotes a depth of a central light input surface 311, D denotes a size (diameter) of the central light input surface 311, and A denotes an inclination angle of a side input surface. The optical characteristics of the first lens structure 300a may be determined by a shape of the first light input part 310 that is determined by a focal length L2 of the first lens structure 300a, a focal length L1 of the second output lens part 520, and sizes of A, D, and H.

(62) The first body part 320 forms a body of the first lens structure 300a, and the light input to the first light input part 310 may be totally reflected in the first body part 320. A side surface of the first body part 320 on a front side may be a first light output surface 321a, from which light is output.

(63) The first inclined surface 323 may be formed on a lower surface of the first body part 320. The first inclined surface 323 may be formed to be inclined upward as it goes toward the first light output surface 321a. The first cutoff part 330 may be formed at a point, at which the first inclined surface 323 and the first light output surface 321a meet each other. A cutoff line of the first light distribution pattern may be formed by the shape of the first cutoff part 330. By guidance of light by the first inclined surface 323 and the shape of the first cutoff part 330, a cutoff line of the low beam pattern may be formed with no separate shield member.

(64) Here, for example, the first inclined surface 323 may be formed at a portion of a lower surface of the first body part 320. Accordingly, more light may be output forward than when the inclined surface is formed on the entire lower surface, and thus, a light intensity for forming the first light distribution pattern may be secured while the cutoff line is formed. A reference numeral 324 that is not described is an area of the lower surface of the first body part 320, in which the first inclined surface 323 is not formed.

(65) Meanwhile, referring to FIGS. 5 and 6, the first light distribution pattern formed (or located) in the first total reflection lens 300 includes a stepped part of the cutoff line (see part k of FIG. 17). The first cutoff part 330 may be formed to have a step 331 at a center thereof to form the stepped part k.

(66) In the first output lens part 510, because the first output surface 512 and the first input surface 511 are formed to be symmetrical to each other with respect to the optical axis, light may be concentrated at the optical axis and an area that is adjacent to the optical axis.

(67) Meanwhile, referring to FIG. 3, the plurality of first light output surfaces 321a provided in the plurality of first lens structures 300a may be integrally formed to form one lens light output surface 321.

(68) Furthermore, the lens light output surface 321 may be formed as a curved surface, and a leftward/rightward cross-sectional shape of the lens light output surface 321 may be formed in a curved shape that is concave in a direction toward the first light source unit 100.

(69) Specifically, the first total reflection lens 300 includes a plurality of first lens structures 300a, and each of the plurality of first lens structures 300a includes a first light output surface 321a. In an embodiment of the present disclosure, because light is concentrated in one area of the first total reflection lens 300, the plurality of first light output surfaces 321a may be continuously formed with no stepped part. Then, a light output surface that is continuously formed by integrally forming the plurality of first light output surfaces 321a is defined as a lens light output surface 321.

(70) Furthermore, the lens light output surface 321 may be formed as a spherical surface that is formed to be concave in a direction toward the first light input part 310 on a cross section that is parallel to a ground surface. In this way, by forming the lens light output surface 321 concavely, it is possible to condense a larger amount of light from the lens light output surface 321 toward the optical axis than when the lens light output surface 321 is flat. Accordingly, a light efficiency may be increased by improving the light intensity of the first light distribution pattern.

(71) Meanwhile, when among the plurality of first lens structures 300a included in the first total reflection lens 300, the first lens structure 300a that is disposed in the center with respect to the leftward/rightward direction is defined as a central lens structure, and the first lens structure 300a that is disposed on opposite sides of the central lens structure is defined as a side lens structure, a path of the light formed in the side lens structures may be defocused on the lens light output surface 321.

(72) Specifically, the number of first lens structures 300a may vary depending on a design specification of the lamp. Light that is guided by a central lens structure disposed at the center, among the plurality of first lens structures 300a, may be concentrated on one focus.

(73) On the other hand, light guided by the side lens structures disposed at the sides may be defocused on the lens light output surface 321. Accordingly, most of the light that is output from the first lens structure 300a may be input to the first input surface 511 of the first output lens part 510.

(74) For example, when light is condensed at a single focus in a side lens structure, as in the central lens structure, the spreading angle of light guided by the side lens structure increases, and thus, the light may not be input to the first input surface 511. Accordingly, the light guided by the side lens structure is not concentrated on the focus, and a focus is not formed on the lens light output surface (defocused), and thus, the light guided by the side lens structure may travel at a light angle, at which light may be input to the first input surface 511.

(75) Accordingly, both the turning visibility and the light efficiency of the first light distribution pattern may be secured.

(76) Meanwhile, referring to FIGS. 7 and 8, the first total reflection lens 300 may be formed such that a central axis CL of the first total reflection lens 300 is spaced apart from a focus F that is formed in the first output lens part 510 (see d1 of FIG. 8).

(77) Here, the central axis CL of the first total reflection lens 300 means a forward/rearward axis that passes through a center C of the central light input surface 311 of the first light input part 310 included in the central lens structure. Furthermore, a step 331 of the first cutoff part 330 is formed on the focus F formed by the first output lens part 510.

(78) The first total reflection lens 300 may be formed such that the central axis CL of the first total reflection lens 300 is spaced apart from the focus F formed by the first output lens part 510. Accordingly, the central axis CL of the first total reflection lens 300 may avoid the step 331 of the first cutoff part 330. Accordingly, a long-distance performance of the first light distribution pattern may be improved.

(79) More specifically, when the central axis of the first total reflection lens 300 passes through the focus of the first output lens part 510, the light efficiency increases, but it may be difficult to achieve the long-distance performance, that is, it may be difficult for light to reach a long distance. Accordingly, because the central axis of the first total reflection lens 300 is formed to be spaced apart from the focus formed by the first output lens part 510, both the light efficiency and the long-distance performance may be secured (see FIG. 21).

(80) Meanwhile, on a cross section that is perpendicular to the central axis of the first lens structure 300a, the first light output surface 321a may be formed to be inclined toward the first light input part 310 as it goes upward. For reference, in the illustrated embodiment, a shape, in which the lens light output surface 321 formed by the first light output surface 321a is inclined, is illustrated.

(81) In this way, the light efficiency may be improved by adjusting a degree of inclination of the first light output surface 321a. Specifically, when the angle of the first light output surface 321a is formed to be perpendicular to the central axis of the first lens structure 300a, light may not be input to the first input surface 511. This phenomenon may occur more frequently when the output lens 500 is a left/right slim lens that is long in the leftward/rightward direction while having a low height in an upward/downward direction.

(82) Accordingly, when the first light output surface 321a is formed to be inclined in consideration of the size of the first output lens part 510, most of the light output from the first lens structure 300a may be input to the first input surface 511. Accordingly, the light efficiency may be improved.

(83) Meanwhile, hereinafter, the second total reflection lens 400 will be described in detail with reference to FIGS. 9 to 16.

(84) Referring to FIGS. 9 and 10, each of a plurality of second lens structures 400a, 400b, 400c, 400d, and 400e may include a second light input part 410a, 410b, 410c, 410d, and 410e, to which light is input, and, a second body part 420a, 420b, 420c, 420d, and 420e that is disposed on a front side of the second light input part 410a, 410b, 410c, 410d, and 410e, and in which the second light output surface 421a, 421b, 421c, 421d, and 421e is formed on a front side thereof.

(85) Furthermore, the second body part 420a, 420b, 420c, 420d, and 420e may include a second inclined surface 423a, 423b, 423c, 423d, and 423e that is inclined upward as it goes forward, on a lower surface thereof, and the second cutoff part 430a, 430b, 430c, 430d, and 430e may be formed at a front end of the second inclined surface 423a, 423b, 423c, 423d, and 423e.

(86) Specifically, the second lens structure 400a, 400b, 400c, 400d, and 400e may be a total internal reflection (TIR) lens that guides and condenses input light by total internal reflection. The shape of the second light input parts 410a, 410b, 410c, 410d, and 410e may be similar to the shape of the first light input part 310, but the depth of the central light input surface, the size (diameter) of the central light input surface, and the inclination angle of the side input surface may be different.

(87) The second body part 420a, 420b, 420c, 420d, and 420e form a body of the second lens structure 400a, 400b, 400c, 400d, and 400e, and light input to the second light input parts 410a, 410d, and 410e may be totally reflected in the second body part 420a, 420b, 420c, 420d, and 420e. A front side surface of the second body part 420a, 420b, 420c, 420d, and 420e may be a second light output surface 421a, 421b, 421c, 421d, and 421e, from which light is output.

(88) The second inclined surface 423a, 423b, 423c, 423d, and 423e may be formed on the lower surface of the second body part 420a, 420b, 420c, 420d, and 420e. The second inclined surface 423a, 423b, 423c, 423d, and 423e may be formed to be inclined upward as it goes toward the second light output surface 421a, 421b, 421c, 421d, and 421e. The second cutoff part 430a, 423b, 423c, 423d, and 423e may be formed at a point, at which the second inclined surface 423a, 423b, 423c, 423d, and 423e and the second light output surface 421a, 421b, 421c, 421d, and 421e meet each other. A cutoff line of the second light distribution pattern may be formed by the shapes of the second cutoff parts 430a, 430b, 430c, 430d, and 430e. By guidance of the light by the second inclined surfaces 423a, 423b, 423c, 423d, and 423e and the shapes of the second cutoff parts 430a, 430b, 430c, 430d, and 430e, a cutoff line of a low beam pattern may be formed with no separate shield member.

(89) Here, due to the nature of the second light distribution pattern formed by the second total reflection lens 400, a stepped part is not necessary, a step may not be formed in the second cutoff parts 430a, 430b, 430c, 430d, and 430e.

(90) The second light output surfaces 421a, 421b, 421c, 421d, and 421e may be formed to be inclined toward the second light input parts 410a, 410b, 410c, 410d, and 410e as they go upward.

(91) Accordingly, a light efficiency may be improved by increasing an amount of light that is input to the second output lens part 520.

(92) When the plurality of second lens structures 400a, 400b, 400c, 400d, and 400e are arranged in the leftward/rightward direction, and the inclination angles of the second light output surface 421a, 421b, 421c, 421d, and 421e on a cross section that passes through the central axes of the second lens structure 400a, 400b, 400c, 400d, and 400e and is perpendicular to the ground surface is defined as tilting angles, the tilting angles of the plurality of second light output surfaces 421a, 421b, 421c, 421d, and 421e provided in the plurality of second lens structures 400a, 400b, 400c, 400d, and 400e may be formed to become smaller as they goes from one end D21 in the leftward/rightward direction to an opposite end D22 in the leftward/rightward direction.

(93) Specifically, when an optical path is formed in an optical system for forming a second light distribution pattern that spreads leftward and rightward, the light output from the second total reflection lens 400 may not enter the second input surface 521 and may splash upward due to an aberration of the asymmetrically formed second output lens part 520. More specifically, because the second output lens part 520 is formed to be curved toward the second total reflection lens 400 as it goes from the one end D21 to the opposite end D22, a distance between the focus and the second input surface 521 may increase as it goes toward the one end D21. Accordingly, at the one end D21, an upward light splashing phenomenon may occur more frequently than at the opposite end D22.

(94) Accordingly, to solve this problem, the tiling angles of the plurality of second light output surfaces 421a, 421b, 421c, 421d, and 421e may be formed to decrease as the go from the one end D21 in the leftward/rightward direction to the opposite end D22 in the leftward/rightward direction. That is, the tiling angles of the second light output surfaces 421a, 421b, 421c, 421d, and 421e may be formed to be larger as they go toward the one end D21, and thus, the upward light splashing phenomenon may be minimized.

(95) For example, in FIG. 11, a second lens structure 400a disposed on a side that is closest to the one side is illustrated. Furthermore, in FIG. 12, a second lens structure 400e disposed on a side that is closest to the opposite side is illustrated. As in the illustrated embodiment, a tilting angle 1 of the second light output surface 421a of the second lens structure 400a, which is disposed on a side that is closest to the one side, may be formed to be greater than the tilting angle 5 of the second light output surface 421e of the second lens structure 400e, which is disposed on a side that is closest to the opposite side. This may also be identified through the side view of FIG. 16.

(96) Meanwhile, as illustrated in FIGS. 1 and 3, the first input surface 511 may be formed to be convex in a direction toward the first total reflection lens 300 with respect to the leftward/rightward direction. Furthermore, the first output surface 512 may be formed to be convex toward the front side with respect to the leftward/rightward direction.

(97) On the other hand, as illustrated in FIGS. 9 and 10, a rear side of the second input surface 521 may curved in a direction toward the second total reflection lens 400 as it goes from the one end D21 to the opposite end D22 with respect to the leftward/rightward direction. Furthermore, the second output surface 522 may be curved in a shape corresponding to the second input surface 521 with respect to the leftward/rightward direction.

(98) Furthermore, the first output surface 512 and the second output surface 522 may be continuously formed with no stepped part.

(99) Referring to FIGS. 9 and 10, the light guided by the plurality of second lens structures 400a, 400b, 400c, 400d, and 400e may form a plurality of vertical focuses with respect to the vertical direction. The second light distribution pattern may be designed such that only a vertical focus is formed due to leftward and rightward spreading design characteristics.

(100) And a plurality of vertical focuses may be formed to be curved along a curving direction of the second output surface 522.

(101) Specifically, because the second output surface 522 and the second input surface 521 are formed to be curved, the focuses of the parts of the second output lens part 520 may be different. Accordingly, the vertical focuses of the second lens structures 400a, 400b, 400c, 400d, and 400e may be formed differently to correspond to the different focuses of the parts of the second output lens part 520.

(102) Furthermore, the positions of the plurality of second cutoff parts 430a, 430b, 430c, 430d, and 430e provided in the plurality of second lens structures 400a, 400b, 400c, 400d, and 400e may be formed differently to be located at positions corresponding to the plurality of vertical focuses.

(103) Specifically, the second cutoff parts 430a, 430b, 430c, 430d, and 430e may be located at positions corresponding to the plurality of focuses formed in the second output lens part 520. Accordingly, the positions of the second cutoff parts 430a, 430b, 430c, 430d, and 430e may be formed at a plurality of different positions to be located at positions corresponding to a plurality of vertical focuses.

(104) Meanwhile, referring to FIG. 13, the second cutoff parts 430a, 430b, 430c, 430d, and 430e may be formed to be located on a front side of the position of the focus formed by the second output lens part 520.

(105) Specifically, as described above, the aberration of the second output lens part 520 may be more severe as it is positioned to be closest to the one end with respect to the leftward/rightward direction. Furthermore, an upward light splashing phenomenon may occur due to this. By locating the second cutoff parts 430a, 430b, 430c, 430d, and 430e on a front side of the focuses of the second output lens parts 520, the path of the light output from the second light output surfaces 421a, 421b, 421c, 421d, and 421e may be adjusted such that the light is input to the second output lens part 520. Accordingly, it is possible to minimize the light splashing phenomenon, in which light cannot be input to the second output lens part 520.

(106) Meanwhile, referring to FIGS. 14 to 16, the path of the light formed by at least some of the plurality of second lens structures 400a, 400b, 400c, 400d, and 400e may be leftward/rightward asymmetric with respect to the central axes of the second lens structures 400a, 400b, 400c, 400d, and 400e.

(107) Specifically, referring to the optical paths illustrated in FIGS. 10 and 16, it may be identified that the optical paths by the plurality of second lens structures 400a, 400b, 400c, 400d, and 400e are different. This is because the shapes of the parts of the second output lens part 520 and the positions of the second light output surfaces 421a, 421b, 421c, 400d, and 421e of the second lens structures 400a, 400b 400c, 400d, and 400e are different.

(108) For example, in FIG. 14, a second lens structure 400a disposed on a side that is closest to the one side is illustrated. Furthermore, in FIG. 15, a second lens structure 400c disposed third from the one end is illustrated. As in the illustrated embodiment, a path of the light guided by the second lens structure 400a disposed at a side that is closest to the one side may be leftward/rightward symmetrical with respect to the central axis of the second lens structure 400a. On the other hand, a path of light guided by a second lens structure 400c disposed third from the one end may be leftward/rightward asymmetrical with respect to the central axis of the second lens structure 400c.

(109) Spreading characteristics that satisfy the light distribution performance regulation may be secured by the light path. However, the light path by the plurality of second lens structures 400a, 400b, 400c, 400d, and 400e and the second output lens part 520 is not limited to the illustrated embodiments.

(110) According to the embodiment of the present disclosure, the plurality of second lens structures is disposed in the leftward/rightward direction and are integrally formed to form one second total reflection lens, and thus, the light efficiency may be improved by simplifying the assembly process and minimizing the assembly tolerance.

(111) Although specific embodiments of the present disclosure have been described above, the spirit and scope of the present disclosure are not limited to these specific embodiments, and various modifications and variations can be made by a person skilled in the art, to which the present disclosure pertains, without deviating from the gist of the present disclosure described in the claims.