KR101937972B1 - A lamp for vehicle - Google Patents

Abstract

A lamp for a vehicle according to an embodiment of the present invention includes a light source and a lens for refracting light emitted from the light source and irradiating a low beam to the front of the vehicle, And an exit portion through which the light of the light source incident into the lens through the incident portion is refracted and emitted. The exit portion is formed to have an independent curvature to refract the light emitted from the light source, Wherein at least some of the boundary lines forming part of the plurality of facets with the neighboring facets are formed obliquely with respect to a virtual vertical line.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp for a vehicle, and more particularly to a lamp for a vehicle that irradiates a beam pattern toward the front of the vehicle.

2. Description of the Related Art [0002] Generally, a vehicle is equipped with various types of vehicle lamps having a lighting function for easily confirming an object located in the vicinity of the vehicle at nighttime, and a signal function for notifying other vehicle or road users of the running state of the vehicle.

For example, a low beam, a high beam, a turn signal, and a position lamp are installed in a head lamp installed in front of a vehicle, and a daytime running light (DRL) is recently added.

Each lamp is regulated by laws and regulations for its installation and specifications so that each function can be fully utilized, and the lenses of each lamp are designed separately so that beam patterns satisfying the regulations are irradiated.

In particular, in the case of a low beam, a beam pattern must be formed below a predetermined cut-off line so as not to interfere with the field of view of a driver of an opposite vehicle, unlike other beam patterns. In order to form a beam pattern in which a cut-off line is formed, a method of implementing a cut-off line by shielding a part of light emitted from a light source by providing a shield between a light source and a lens is widely used.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle lamp capable of forming a low beam pattern in which a cut-off line is formed without using a shield.

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

According to an aspect of the present invention, there is provided a vehicular lamp including a light source and a lens for refracting light emitted from the light source and irradiating a low beam to the front of the vehicle, And an exit part for emitting light of the light source incident into the lens through the entrance part, wherein the exit part is formed to have an independent curvature and refracts the light emitted from the light source, And a plurality of facets forming a beam pattern of the low beam, wherein some of the plurality of facets are inclined facets in which at least a part of the boundary lines constituting the adjacent facets is formed obliquely with respect to a virtual vertical line.

The light having passed through the inclined facets may form an inclined line in a cut-off line of the low beam pattern.

The inclined facets may be formed on one side of the central portion of the emitting portion.

The inclined facets may be formed on the corner side of the emitting portion.

The inclined facets may have a trapezoidal or parallelogram shape with respect to the boundary line between adjacent facets.

The other part of the plurality of facets may be a rectangular wave set in which a boundary line formed with neighboring facets is formed horizontally or vertically.

At least one of the plurality of facets may include an inclined surface formed downward toward the front of the vehicle.

The light emitted from the facets located in the central region of the outgoing portion among the plurality of facets may form a wide spread beam pattern having a width corresponding to the width of the beam pattern of the low beam.

The light emitted from the facets located in the outer region of the outgoing portion among the plurality of facets may form a spot beam pattern adjacent to the cut-off line of the beam pattern of the low beam.

The inclined facets may be formed in the outer region.

The light emitted from the facets positioned between the central region of the outgoing portion and the outmost region of the outgoing portion among the plurality of facets may form a mid spread beam pattern having a width smaller than the width of the wide spread beam pattern .

Wherein the lens further comprises a total reflection part provided between the incident part and the output part, wherein the total reflection part totally reflects part of the light emitted from the light source and incident into the lens through the incident part, .

The total reflection part may be formed with a curvature that reflects light incident on the total reflection part of the light emitted from the light source in parallel to the optical axis of the lens.

The exit portion may form a front surface of the lens, the entrance portion may form a rear surface of the lens, and the total reflection portion may connect the exit portion and the entrance portion to form a side surface of the lens.

The incident portion may be formed so as to be gradually reduced in diameter toward the inside of the lens.

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

The embodiments of the present invention have at least the following effects.

It is possible to form a low beam pattern in which a cut-off line is formed without using a shield.

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

1 is a perspective view showing a lens of a vehicle lamp according to an embodiment of the present invention.
Fig. 2 is a front view showing the lens of Fig. 1;
3 is a bottom perspective view showing the lens of Fig.
4 is a rear perspective view showing the lens of Fig.
5 is a schematic cross-sectional view showing a lamp for a vehicle according to an embodiment of the present invention.
6 is a schematic view of a low beam pattern implemented by a vehicle lamp according to an embodiment of the present invention.
7 is a front view showing a lens of a vehicle lamp according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Further, the embodiments described herein will be described with reference to cross-sectional views and / or schematic drawings that are ideal illustrations of the present invention. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. In addition, in the drawings of the present invention, each component may be somewhat enlarged or reduced in view of convenience of explanation. Like reference numerals refer to like elements throughout the specification.

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

FIG. 1 is a perspective view showing a lens of a vehicle lamp according to an embodiment of the present invention, FIG. 2 is a front view showing the lens of FIG. 1, FIG. 3 is a bottom perspective view showing the lens of FIG. 1, FIG. 5 is a schematic cross-sectional view illustrating a vehicle lamp according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view of a vehicle lamp according to an embodiment of the present invention 1 schematically shows a low beam pattern.

As shown in FIG. 5, a vehicle lamp according to an embodiment of the present invention includes a lens 1 and a light source 41. The vehicle lamp according to the embodiment of the present invention may be one of the lamps constituting the head lamp of the vehicle, and the lens 1 may refract light emitted from the light source 41, A beam pattern can be generated.

As shown in Figs. 1 to 5, the lens 1 includes an incident portion 10, an output portion 30, and a total reflection portion 20. The incident part 10 forms the rear surface of the lens 1 and the output part 30 forms the front surface of the lens 1. The total reflection part 20 forms the output part 30 and the incident part 10 And forms the side surface of the lens 1.

As shown in Figs. 1 to 3, the emitting portion 30 is constituted by a plurality of facets 31, 32. Each facet 31, 32 has an independent curvature. Thus, the plurality of facets 31, 32 may all have different sizes and curvatures, and the plurality of facets 31, 32 may be composed of a plurality of groups of similar size or curvature.

The size and curvature of each facet 31,32 are emitted from a light source 41 to form a low beam pattern (see Figure 6) in which the combination of light passing through each facet 31,32 forms a cut-off line .

As shown in FIG. 2, the plurality of facets 31. 32 includes a rectangular facet 31 and an inclined facet 32.

The rectangular facets 31 are facets in which boundary lines formed with adjacent facets are formed horizontally or vertically.

As shown in Fig. 2, most of the rectangular facets 31 are formed to have a rectangular or square boundary line. The facets located at the edges of the outgoing portion 30 of the rectangular facets 31 are formed to have a horizontally or vertically borderline and an arc-shaped boundary line. This is because the emitting unit 30 has a circular outline line. Accordingly, the rectangular facets 31 located at the edge of the emitting portion 30 may have boundary lines of various shapes depending on the shape of the outline of the emitting portion 30. [

On the other hand, the inclined facet 32 is a facet in which at least a part of boundary lines constituting the adjacent facets is formed obliquely with respect to a virtual vertical line.

2, the inclined facets 32 may be formed on one side of the central portion of the emergent portion 30. As shown in Fig.

The inclined facet 32 of the lens 1 according to the present embodiment has a first inclined facet 32a, a second inclined facet 32b, a third inclined facet 32b, A facet 32c and a fourth inclined facet 32d.

The first inclined facets 32a are adjacent to the rectangular facets 31 on the upper, lower and left sides and the second inclined facets 32b on the right. The boundary line adjacent to the rectangular facets 31 is formed horizontally or vertically and the boundary line adjacent to the second inclined facet 32b forms an angle of? 1 with the imaginary vertical line and is formed obliquely toward the lower right. Thus, the boundary line between the first inclined facet 32a and adjacent facets becomes approximately trapezoidal.

The second inclined facet 32b is adjacent to the upper and lower rectangular facets 31 and adjacent to the first inclined facet 32a to the left and to the third inclined facet 32c to the right . The boundary line adjacent to the rectangular facets 31 is formed horizontally or vertically and the boundary line adjacent to the third inclined facet 32c forms an angle of? 2 with the imaginary vertical line and is formed obliquely toward the lower right. Therefore, the boundary line formed by the second inclined facets 32b with neighboring facets becomes approximately trapezoidal. When the angles of? 1 and? 2 are substantially equal to each other, the boundary line formed by the second inclined facets 32b with neighboring facets becomes a substantially parallelogram.

The third inclined facet 32c is adjacent to the upper and lower facets 31 and adjacent to the second inclined facets 32b to the left and to the fourth inclined facets 32d to the right . The boundary line adjacent to the rectangular facets 31 is formed horizontally or vertically and the boundary line adjacent to the fourth inclined facet 32d forms an angle of? 3 with a virtual vertical line and is formed obliquely toward the lower right. Thus, the boundary line between the third inclined facet 32c and adjacent facets becomes approximately trapezoidal. When the angles of? 2 and? 3 are substantially equal to each other, the boundary line formed by the second inclined facets 32b with neighboring facets becomes a substantially parallelogram.

The fourth inclined type facet 32d is adjacent to the upper and lower rectangular facets 31 and adjacent to the third inclined facet 32c on the left side and the outline line of the outgoing portion 30 on the right side . Accordingly, the upper and lower boundary lines adjacent to the rectangular facets 31 are formed horizontally, and the left boundary line adjacent to the third inclined facet 32c forms an angle of &thetas; 3 with the virtual vertical line and is inclined toward the lower right The boundary line on the right side is arc-shaped. However, the shape of the boundary line on the right side may be different from that in the case of not having the circular outline line.

The lens 1 according to the present embodiment has been described in which the four inclined facets 32a, 32b, 32c, and 32d are formed in a row on the right side of the central portion of the exit portion 30, The lens 1 according to the present embodiment is provided with four inclined facets 32a (32a, 32b, 32c, 32d) on the exit portion 30, 32b, 32c, and 32d are formed in a row, the number and arrangement of the inclined facets 32a, 32b, 32c, and 32d may vary depending on the embodiment.

Since most of the rectangular facets 31 are formed to have a rectangular or square boundary line, the beam pattern generated by the light emitted through the rectangular facets 31 also forms a beam pattern of a substantially rectangular or square shape.

However, since the inclined facets 32 are formed such that at least some of the boundary lines are formed obliquely with respect to a virtual vertical line, the beam pattern generated by the light exiting through the inclined facets 32 is at least partially aligned with respect to the horizontal or vertical line The beam pattern becomes obliquely formed.

The lens 1 according to an embodiment of the present invention forms an oblique line in the cut-off line of the low beam pattern by using the light emitted through the inclined facet 32.

As shown in FIG. 6, the beam pattern L4 formed by the light emitted through the inclined facets 32 forms an oblique slope with respect to the horizontal line. 6, by designing the facets of the inclined facets 32 such that a part of the beam pattern L4 formed by each inclined facet 32 protrudes rightward upward from the center of the cut-off line of the low beam pattern As shown, an oblique line may be formed in the cut-off line of the low beam pattern.

The beam pattern shown in Fig. 6 is a beam pattern emitted from a vehicle lamp mounted on a vehicle which is operated in a country or region for which right-hand traffic is forced. In the vehicle lamp mounted on a vehicle traveling in a country or region where left- In the beam pattern to be emitted, a part of the beam pattern L4 formed by the light emitted through the inclined facets 32 may be formed so as to protrude upward from the center of the cut-off line of the low beam pattern. In this case, the inclined facets 32 may be formed on the left side of the central portion of the outgoing portion 30. However, since the facets of the inclined facets 32a, 32b, 32c, and 32d can be designed independently, the positions of the inclined facets 32a, 32b, 32c, and 32d are not dependent on the direction of travel of the vehicle.

As shown in Figs. 4 and 5, the incidence portion 10 is recessed into the lens 1. As shown in FIG. 5, the incident portion 10 may be formed so as to gradually decrease in diameter toward the inside of the lens 1.

The incident portion 10 includes a first incident surface 11 facing the emitting portion 30 and a second incident surface 12 extending from the first incident surface 11 toward the rear of the lens 1 do.

The first incident surface 11 may be formed to be convex curved toward the rear of the lens 1 and the second incident surface 12 may be formed to be a curved surface whose diameter gradually decreases toward the first incident surface 11 Respectively.

The total reflection portion 20 connects the outer periphery of the emitting portion 30 and the outer periphery of the incident portion 10 and forms a side portion of the lens 1. The diameter of the rear end of the second incident surface 12 may be smaller than the diameter of the outermost portion of the output portion 30 and the total reflection portion 20 connecting the output portion 30 and the incident portion 10 may be formed in the outgoing portion It is possible to form a curved body having a shape gradually increasing in diameter toward the center of the curved surface.

5, the total reflection part 20 totally reflects light that is emitted from the light source 41 and is incident on the total reflection part 20 toward a plurality of facets 31 and 32 of the emission part 30 .

The total reflection part 20 is formed with a curvature such that the light emitted from the light source 41 and incident on the total reflection part 20 can be reflected substantially parallel to the optical axis A of the lens 1. For this, the total reflection part 20 may include a parabolic surface with the light source 41 as a focal point.

As shown in Fig. 5, the light source 41 is provided adjacent to the incidence portion 10 of the lens 1. Fig. 5 shows an example in which the light source 41 is located outside the lens 1. However, in another embodiment, the light source 41 may be located in the incident portion 10. [

The light source 41 may be located on the optical axis A of the lens 1. [ At the same time, the light source 41 may be positioned on the focal point of the lens 1.

A part L2 or L3 of light L1, L2, L3 or L4 emitted from the light source 41 is incident on the first incident surface 11 and passes through the facets of the emitting unit 30 (31, 32). L 1 and L 4 of the lights L1, L2, L3 and L4 emitted from the light source 41 are incident on the second incident surface 12 and totally reflected by the total reflection section 20, ) Through the facets 31,

As described above, since the second incident surface 12 forms a curved surface whose diameter progressively decreases toward the first incident surface 11, as shown in FIG. 5, the incident surface 12 is incident on the second incident surface 12, The light L1 and L4 are further refracted toward the outside of the lens 1 and are incident into the lens 1. [ Therefore, the lights L1 and L4 emitted from the light source 41 can be more efficiently incident on the total reflection section 20. [

The facets 31 and 32 of the output section 30 are designed to form a low beam pattern in which light emitted from the light source 41 passes through the respective facets 31 and 32 to form a cut- . 5, the facets 31a and 31b of at least some of the facets 31 and 32 are arranged such that the light L2 and L3 are emitted downward to form a low beam pattern, A of the upper surface of the substrate.

Therefore, in the vehicle lamp according to the embodiment of the present invention, the low beam pattern is formed using the facets 31 and 32 having independent curvatures and sizes, respectively, without using a separate shield. Particularly, the lens 1 according to the embodiment of the present invention forms the inclined facets 32 in the emitting portion 30 and forms the inclined lines in the cut-off lines of the low beam pattern without using any additional shields can do.

Meanwhile, as shown in FIG. 2, the emitting unit 30 can be divided into three regions Z1, Z2, and Z3.

The third region Z3 is an outer region of the emitting unit 30 and the second region Z2 is a central region of the emitting unit 30. The first region Z1 is a central region of the emitting unit 30, And is an area excluding the first area Z1 and the third area Z3 in the output unit 30 as an area located between the outer areas. The inclined facets 32 in each of the zones Z1, Z2 and Z3 can be excluded.

The facets located in the first region Z1 are formed so that the beam pattern formed by the combination of the lights emitted from the facets located in the first region Z1 forms the wide spread beam pattern L1 of the low beam pattern . The wide spread beam pattern L1 may be a beam pattern having a width approximately equal to the width of the low beam and may be a beam pattern distributed not only to a near region of a low beam but also to a region adjacent to a cut- have.

Since the first region Z1 is the region closest to the light source 41 among the three regions Z1, Z2 and Z3, the optical image emitted from the facets located in the first region Z1 is reflected in the other regions Z2, Z3, the image is larger and the light intensity is higher than that of the light image emitted from the facets. Therefore, the beam pattern emitted from the facets of the first zone Z1 is suitable for use as the wide spread beam pattern L1 distributed over the widest region of the low beam pattern.

The facets located in the second region Z2 are formed so that the beam pattern formed by the combination of the light emitted from the facets located in the second region Z2 forms the mid-spread beam pattern L2 in the low beam pattern . The midspread beam pattern L2 may be a beam pattern having a smaller width than the wide spread beam pattern L1 and may be a beam pattern formed at a long distance and a middle distance rather than a near position of the low beam.

The facets located in the third region Z3 are formed such that the beam pattern formed by the combination of the lights emitted from the facets located in the third region Z3 forms the spot beam pattern L3 in the low beam pattern . The spot beam pattern L3 may be a beam pattern formed adjacent to the cut-off line of the beam pattern of the low beam, and may be a beam pattern focused on a long distance of the low beam.

Since the third region Z3 is the region farthest from the light source 41 among the three regions Z1, Z2 and Z3, the optical image emitted from the facets located in the third region Z3 is the region Z1 , Z2, the image is smaller and the brightness is lower than the optical image emitted from the facets. Therefore, the beam pattern emitted from the facets of the third zone Z3 is suitable for use as the spot beam pattern L3 distributed in the narrowest area of the low beam pattern.

Accordingly, the vehicle lamp according to the embodiment of the present invention may be constructed by using a plurality of facets 31 and 32 having independent curvatures and sizes, respectively, without using a separate shield to form the wide spread beam pattern L1 of the low beam, It is possible not only to form the spread beam pattern L2 and the spot beam pattern L3, but also to create a cut-off line in which an oblique line is formed at the center portion in the low beam pattern.

7 is a front view showing a lens of a vehicle lamp according to another embodiment of the present invention.

In the lens 1 according to the above-described embodiment, the emitting portion 30 has a circular shape, whereas the lens 2 according to the embodiment shown in FIG. 7 has a substantially rectangular shape of the emitting portion 130 .

As shown in FIG. 7, the lens 2 according to the present embodiment may also be divided into three regions Z1, Z2, and Z3.

The third area Z3 is an outer area of the output unit 130 and the second area Z2 is a center area of the output unit 130. The first area Z1 is a center area of the output unit 130, And is an area excluding the first area Z1 and the third area Z3 in the output unit 130 as an area located between the outer areas.

As described above, the beam pattern emitted from the facets of the first zone Z1 is used as the wide spread beam pattern L1 of the low beam pattern, and the beam pattern emitted from the facets of the second zone Z2 is used as the low- The beam pattern used as the midspread beam pattern L2 of the beam pattern and the beam pattern emitted from the facets positioned in the third region Z3 are used as the spot beam pattern L3 of the low beam pattern.

The beam pattern L4 forming the inclined line in the cut-off line of the low beam pattern is adjacent to the spot beam pattern L3 or partly overlapped with the spot beam pattern L3.

7, the inclined facets 32 forming the beam pattern L4 forming the inclined lines are formed in the third area Z3 of the exit portion 130 forming the spot beam pattern L3 Is advantageous in designing the facets of the inclined facets 32. [0033]

7, the inclined facets 32 may be positioned on the corner side of the exit portion 130 in the third zone Z3. In this case, the oblique facets 32 and the adjacent rectangular facets 31 can be minimized, so that the design of the lens 2 is easier.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

1: lens 10: incident part
11: first incident surface 12: second incident surface
20: front half 30:
31: rectangular shaped facet 32: inclined type facet
32a: first inclined type facet 32b: second inclined type facet
32c: third inclined type facet 32d: fourth inclined type facet
41: light source A: optical axis
Z1: first region Z2: second region
Z3: third region

Claims (15)

And a lens for refracting light emitted from the light source and irradiating a low beam to the front of the vehicle,
The lens,
An incident portion on which light emitted from the light source is incident,
And an exit portion through which the light of the light source incident into the lens through the incident portion is refracted and emitted,
Wherein each of the exit portions includes a plurality of facets each having an independent curvature to refract light emitted from the light source and form a beam pattern of the low beam,
Wherein some of the plurality of facets are inclined facets in which at least a part of the boundary lines between adjacent facets is formed obliquely with respect to a virtual vertical line,
Wherein the light passing through the inclined facets forms an oblique line in a cut-off line of the beam pattern of the low beam. delete The method according to claim 1,
Wherein the inclined facets are formed on one side of a central portion of the emitting portion. The method according to claim 1,
And the inclined facets are formed on a corner side of the exit portion. The method according to claim 1,
Wherein the inclined feature is a trapezoidal or parallelogram shape of a boundary line between the adjacent facets. The method according to claim 1,
Wherein another one of the plurality of facets is a rectangular facet in which a boundary line forming a neighboring facet is formed horizontally or vertically. The method according to claim 1,
Wherein at least one of the plurality of facets includes an inclined surface formed downward toward the front of the vehicle. The method according to claim 1,
Wherein the light emitted from the facets located in the central region of the exit portion of the plurality of facets forms a wide spread beam pattern having a width corresponding to the width of the beam pattern of the low beam. 9. The method of claim 8,
Wherein light emitted from facets located in an outer region of the outgoing portion among the plurality of facets forms a spot beam pattern adjacent to a cut-off line of the beam pattern of the low beam. 10. The method of claim 9,
Wherein the inclined facets are formed in the outer region. 10. The method of claim 9,
Wherein light emitted from facets positioned between a central region of the outgoing portion and an outlined region of the outgoing portion among the plurality of facets forms a mid spread beam pattern having a width smaller than the width of the wide spread beam pattern, lamp. The method according to claim 1,
The lens,
Further comprising a total reflecting portion provided between the incident portion and the emitting portion,
Wherein the total reflection portion totally reflects a part of the light emitted from the light source and incident into the lens through the incidence portion toward the plurality of facets. 13. The method of claim 12,
Wherein the total reflection section comprises:
Wherein a curvature is formed in the light emitted from the light source so as to reflect light incident on the light reflecting portion in parallel with the optical axis of the lens. 14. The method of claim 13,
Wherein the exit portion forms a front surface of the lens, the entrance portion forms a rear surface of the lens, and the total reflection portion connects the exit portion and the entrance portion, and forms a side surface of the lens. The method according to claim 1,
The light-
Wherein the lens is formed so as to gradually decrease in diameter toward the inside of the lens.

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