CN111271679B

CN111271679B - Vehicle lamp

Info

Publication number: CN111271679B
Application number: CN201911104776.7A
Authority: CN
Inventors: 金炯都; 金锺抎; 柳昌浩
Original assignee: SL Corp
Current assignee: SL Corp
Priority date: 2018-12-05
Filing date: 2019-11-13
Publication date: 2022-02-22
Anticipated expiration: 2039-11-13
Also published as: DE102019218776A1; KR20200068247A; CN111271679A; DE102019218776B4

Abstract

A lamp for a vehicle according to an embodiment of the present invention may include: a light source unit that emits light; and an optical portion guiding the light, wherein the light source portion may include a plurality of light sources arranged in a matrix shape, the light source portion may include a plurality of optical members arranged in a traveling path direction of the light, and the light emitted from the plurality of light sources may form a beam pattern through the optical portion.

Description

Vehicle lamp

Technical Field

The present invention relates to a vehicle lamp, and more particularly, to a vehicle lamp in which a plurality of light sources, a plurality of optical members, and a shielding member form a high-definition light flux pattern.

Background

In general, vehicles are equipped with a wide variety of light fixtures having the following functions: an illumination function for easily confirming an object located around a vehicle during night driving; and a signal function for informing the driving state of the vehicle to other vehicles or road users.

For example, a Head lamp (Head lamp) and a Fog lamp (Fog lamp) mainly aiming at an illumination function, a Turn signal lamp (Turn signal lamp), a Tail lamp (Tail lamp), a Brake lamp (Brake lamp), a Side marker lamp (Side marker) mainly aiming at a signal function, and the like are provided, and in order to sufficiently exert each function of such a vehicle lamp, a standard and a specification are clearly defined in the legislation.

A headlamp in a vehicle lamp plays a very important role in safe driving as a lamp for forming a low beam pattern or a high beam pattern to ensure a forward field of view of a driver when a vehicle is driven in a dark surrounding environment such as at night.

Such a vehicular lamp is provided as one lamp module that selectively forms a low beam pattern or a high beam pattern as being equipped with a shield member, or also in a case where a headlamp that forms a low beam pattern and a headlamp that forms a high beam pattern are provided as separate lamp modules, respectively.

The vehicle lamp mainly maintains a low beam pattern at ordinary times, thereby preventing dazzling of a driver of an oncoming vehicle or a leading vehicle driver traveling in the opposite direction, and forms a high beam pattern as necessary when traveling at high speed or traveling in a place with dark peripheral brightness, thereby ensuring safe traveling.

Therefore, recently, a headlamp is provided which: when the vehicle is driven in a state where the high beam pattern is formed, if the oncoming vehicle or the preceding vehicle is sensed, the lighting angle, brightness, width, length, and the like of the lamp are automatically adjusted, thereby preventing dazzling of the driver of the oncoming vehicle or the preceding vehicle, i.e., an adaptive high beam.

However, according to the above configuration, in the case where the dark belt is formed in the beam pattern so as not to cause glare to the driver, the dark belt is formed in a large area in the formed beam pattern, and thus the forward visual field may not be effectively secured.

Documents of the prior art

Patent documents: (patent document 1) Korean laid-open patent No. 2015-0118669(2015.10.23)

Disclosure of Invention

The invention provides a vehicle lamp for forming a high-definition light beam pattern.

The invention aims to provide a vehicle lamp for forming a low beam pattern and a light beam pattern of a dark belt.

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

The vehicle lamp according to the present invention has one or more of the following effects.

With the formation of 1000 or more light sources as the light source section, a high-definition beam pattern can be formed.

When the light source unit is rotated with the central axis of the light source unit as a reference so that one side of the light source unit is inclined, the cutoff region of the low beam pattern can be effectively formed.

With the correction of the aberration by the shielding member and the shielding of a part of the light generated from the light source section, a light beam pattern with a bright center and high definition can be formed.

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

Drawings

Fig. 1 is a diagram illustrating a vehicle lamp according to an embodiment of the present invention.

Fig. 2 is a diagram illustrating a sectional view of a vehicle lamp according to an embodiment of the invention.

Fig. 3 is a diagram illustrating a light beam pattern of a vehicular lamp according to an embodiment of the present invention.

Fig. 4 is a diagram illustrating a part of a light source section of a vehicle lamp according to an embodiment of the present invention.

Fig. 5 is a diagram illustrating a light source of a light source section according to an embodiment of the present invention.

Fig. 6 is a diagram illustrating a pixel light pattern formed by a partition wall according to an embodiment of the present invention.

Fig. 7 is a diagram illustrating a pixel light pattern formed without the partition according to an embodiment of the present invention.

Fig. 8 is a diagram illustrating first to third pixel light patterns of the present invention.

Fig. 9 is a diagram illustrating a light source section extinguishing a part of a light source according to an embodiment of the present invention.

Fig. 10 is a diagram showing a bright-dark cut-off region formed by the light source section.

Fig. 11 is a view showing a state where the light source section according to the embodiment of the present invention is rotated with the center axis as a reference.

Fig. 12 is a view showing a cutoff region formed by the rotating light source unit.

Fig. 13 is a diagram showing a path of light emitted from a light source portion of a vehicular lamp according to an embodiment of the present invention.

Fig. 14 is a diagram showing a first example optical system before shading.

Fig. 15 is a diagram showing a beam pattern formed by the first example optical system.

Fig. 16 is a diagram showing a shadow band formed by the first example optical system.

Fig. 17 is a diagram illustrating a second example optical system of shading.

Fig. 18 is a diagram showing a beam pattern formed by the second example optical system.

Fig. 19 is a diagram showing a shadow band formed by the second example optical system.

Fig. 20 to 22 are diagrams exemplarily illustrating a path of the first light according to a position of the shielding member of the present invention.

Fig. 23 is a diagram showing expansion or contraction of the optical member according to temperature.

Fig. 24 is a diagram showing beam paths formed according to the number of plastic optical components.

Fig. 25 is a diagram showing a beam path formed from a converging plastic optical component and a diverging plastic optical component.

Fig. 26 is a diagram showing a case where a part of light sources of the vehicular lamp according to the embodiment of the invention is controlled.

Description of the symbols:

10: light source section 12: light source

100: the optical portion 110: shielding component

120: first optical member 130: second optical member

140: third optical member 150: fourth optical component

160: fifth optical member 170: sixth optical member

Detailed Description

The advantages, features and methods of accomplishing the same will become apparent from the following detailed description of the embodiments when taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, which may be implemented in various forms different from each other, and the embodiments are provided only for the purpose of making the disclosure of the present invention complete and informing a person having basic knowledge in the technical field to which the present invention belongs of the scope of the present invention, which is defined only by the claims. Like reference numerals refer to like elements throughout the specification.

Accordingly, in several embodiments, well known process steps, well known structures and well known techniques have not been described in detail in order to avoid obscuring the present invention.

The terminology used in the description is for the purpose of describing the embodiments and is not intended to be limiting of the invention. In this specification, the singular forms also include the plural forms unless specifically stated in the sentence. The terms "comprising" and/or "including" used in the specification mean that the presence or addition of one or more other constituent elements, steps and/or operations other than the mentioned constituent elements, steps and/or operations is not excluded. Additionally, "and/or" includes each of the referenced items and all combinations of more than one thereof.

Also, the embodiments described herein will be described with reference to perspective, cross-sectional, side, and/or schematic views as idealized examples. Therefore, the form of the example drawings may be deformed depending on the manufacturing technique and/or tolerance, and the like. Therefore, the embodiment of the present invention is not limited to the specific form shown in the drawings, and variations in form according to the manufacturing process are also included. In the drawings illustrated in the present invention, the respective components may be illustrated in somewhat enlarged or reduced sizes in consideration of convenience of explanation.

Hereinafter, a detailed description will be given based on drawings of preferred embodiments of the vehicular lamp according to the present invention.

Fig. 1 is a diagram illustrating a vehicle lamp according to an embodiment of the present invention, fig. 2 is a diagram illustrating a sectional view of the vehicle lamp according to the embodiment of the present invention, fig. 3 is a diagram illustrating a light beam pattern of the vehicle lamp according to the embodiment of the present invention, and fig. 4 is a diagram illustrating a part of a light source section of the vehicle lamp according to the embodiment of the present invention.

As shown in fig. 1 and 2, a vehicle lamp according to an embodiment of the present invention may include a light source portion 10 and an optical portion 100.

The light source section 10 may include a plurality of light sources arranged in a matrix shape, and the optical section may include a plurality of optical members arranged in the light traveling path direction. The Light source 12 may be formed to emit Light having a Light quantity or a color suitable for the use of the vehicular lamp of the present invention, and a Light Emitting Diode (LED) semiconductor Light Emitting element may be used. The optical member may be formed using at least one of a lens, a mirror, and a prism.

Accordingly, the light emitted from the plurality of light sources passes through the optical portion, and a light beam pattern P as shown in fig. 13 can be formed.

In addition, the vehicle lamp according to the embodiment of the present invention may form at least one of a low beam pattern, a high beam pattern, and a signal light pattern among the light beam patterns shown in fig. 3, and extinguish or control at least one of the plurality of light sources to form a dark belt in the light beam patterns. For example, a low beam pattern may be formed by controlling or extinguishing at least a portion of the plurality of light sources by a control portion (not shown) equipped in the vehicle interior, and in order to prevent dazzling of a driver of a sensed leading or oncoming vehicle, the control portion controls at least one light source of the light source portion so that a dark belt may be formed in a portion of the area of the light beam pattern corresponding to a position where the driver is sensed.

The light beam pattern P of the present invention may be formed corresponding to an image that is inverted from the top to bottom and/or from the left to right of the light emission image of the light source section 10. For example, in the case where the light emitting surface of the light source section 10 is formed with an image in which a part of the plurality of light sources 12 is extinguished, as in fig. 4 (a), the light beam pattern P may be formed to include the shadow band S as in fig. 4 (b) and to correspond to the light emitting image of the light source section 10 reversed up and down and/or right and left. Further, in the case where the light beam pattern P is formed as the light emission image of the light source section 10 is inverted vertically and/or horizontally, the number of optical components included in the optical section 100 can be reduced, and the overall size of the vehicle lamp can be reduced.

The black part of fig. 4 is a region where the light source is turned off.

Hereinafter, the light source unit and the optical unit 100 of the present invention will be described in detail, and first, the light source will be described.

The light source unit 10 may be formed using 1000 or more light sources in order to form a high-definition beam pattern, and each light source 12 may be sized to have a diameter of 100 μm or less. The light emitted from each of the plurality of light sources 12 may form a pixel beam pattern PP of a pixel shape included in the beam pattern P as passing through the optical part 100, and the size of the pixel beam pattern PP may be associated with the size of the light source 12. The definition is higher as the size of the pixel beam pattern is smaller, so that in the case where the size of the light source is formed smaller as in the present invention, the definition of the pixel beam pattern PP can be improved. If the light source is sized to have a diameter exceeding 100 μm, the size of the pixel beam pattern becomes large, so that the required definition may become low and the size of the lamp may become large. Further, the size of the light source according to the embodiment of the present invention may be formed to be 60 μm or less.

Further, the number of light sources is 1000 or more, and the size of the pixel beam pattern emitted from each light source can be set to 0.25 degrees or less, so that ADB, the bright-dark cut-off region of the low beam pattern, and the traffic light can be efficiently formed and controlled. In the case where the number of light sources 12 included in the light source section 10 is less than 1000, the size of each light source 12 becomes large, so that high definition of the pixel beam pattern may not be formed as described above. Further, the number of light sources according to an embodiment of the present invention may be formed to be 1000 or more.

In addition, the lateral length of the light source part 10 according to the embodiment of the present invention may be formed to be greater than the vertical length of the light source part. That is, the ratio of the lateral length to the vertical length may be formed to exceed 1: 1. In the vehicle optical system, the beam pattern P is generally formed at 40 ° left and right and 10 ° up and down, and is preferably formed such that the ratio of the lateral length to the vertical length of the optical portion 10 is 4: 1.

Fig. 5 is a diagram illustrating a light source of a light source part according to an embodiment of the present invention, and fig. 6 is a diagram illustrating a pixel light pattern formed by a partition wall according to an embodiment of the present invention.

As shown in fig. 5 (a), the light source section 10 may further include a partition wall positioned between the plurality of light sources 12 and separating the plurality of light sources from each other, and each of the plurality of light sources 12 may include an LED Chip (Chip) 12a controlling the amount of light and a fluorescent body 12b emitting light. As shown in fig. 5 (b), one phosphor 12b is coated on a plurality of LED chips 12a in the related art, whereas in the light source section 10 of the present invention, a plurality of phosphors 12b are provided corresponding to the number of the plurality of LED chips 12a, so that a plurality of light sources 12 are formed to be spaced apart from each other, and a partition wall 14 may be provided between the plurality of light sources 12.

As such, as the respective light sources are provided with the chip 12a and the phosphor 12b with the partition wall 14 between the light sources, it is possible to effectively control the occurrence of GLARE (GLARE) in the pixel beam pattern PP as shown in fig. 6, and to define and limit the size of the phosphor 12b excited by the partition wall. Further, since the glare shape can be controlled, the light flux pattern P including the shadow band, the bright-dark cut-off region of the low beam pattern, and the like can be efficiently formed, and thus a high-definition light flux pattern can be formed.

If there are no partition walls 14 between the plurality of light sources 12, glare may occur in the pixel beam pattern PP0 emitted by the light sources as shown in fig. 7, so that the beam patterns are not clear and interference may occur. Accordingly, the light flux pattern such as the dark belt and the cutoff region of the low beam pattern cannot be formed efficiently.

In addition, the size of the pixel beam pattern PP according to an embodiment of the present invention may be formed to tend to become larger as being farther from the center of the beam pattern. Specifically, the sizes of the pixel beam patterns of the regions located within 5 degrees of the beam pattern are almost similar, and the sizes of the pixel beam patterns of the regions located outside 5 degrees of the beam pattern may be formed to be larger than the sizes of the pixel beam patterns located within 5 degrees.

For example, fig. 8 is a diagram illustrating first to third pixel light patterns of the present invention.

The present invention may be formed such that the size of the pixel beam pattern tends to become larger as it goes toward the outline of the beam pattern. For example, as shown in fig. 8, the size of the first pixel beam pattern PP1 formed at the center of the beam pattern is 0.1 degree, and the sizes of the second and third pixel beam patterns PP2 and PP3 formed at the outline of the beam pattern are 0.11 degree and 0.12 degree, respectively, i.e., the size of the pixel beam pattern may become larger as going toward the outline of the beam pattern.

As the size of the pixel beam pattern becomes smaller, the brightness and definition increase, and as the size of the pixel beam pattern becomes larger, the brightness and definition relatively decrease. Meanwhile, the center of the beam pattern requires higher definition with respect to the outline, so that the size of the pixel beam pattern at the center of the beam pattern becomes smaller to improve hot spot performance, and the size of the pixel beam pattern at the outline of the beam pattern becomes relatively larger to improve diffusion performance.

In addition, as described above, in order to form the cutoff region of the light beam pattern by the light source formed of the plurality of LED chips, a part of the plurality of light sources forming the cutoff region may be turned off.

In this case, as shown in fig. 9 (a), in the light sources of the region of the light source section corresponding to the bright-dark cut-off region, one light source that is turned off is added for each layer in the downward direction, but the inclination of the light-off region may be formed to be 45 degrees, so that the regulation for the bright-dark cut-off region may not be satisfied. Therefore, as shown in fig. 9 (b), two light sources that are turned off are added for each layer, and the angle formed by the light-off region of the light source unit is formed to be about 26 degrees, so that the bright-dark cut-off region of the beam pattern can be formed. The black portion in fig. 9 is a light-off region in the light source section.

With the light source unit shown in fig. 9 (b), the cutoff region of the beam pattern can be formed in the form shown in fig. 10.

Even if the number of light sources to be turned off is increased by 1 for each layer as shown in fig. 9 (a), a bright-dark cut-off region that can meet the regulations can be effectively formed when the light source section 10 is rotated with the central axis Ax of the light source section 10 as a reference to form a part or the whole of the light source section inclined as shown in fig. 11. Specifically, the angle of rotation to tilt may be formed between 0.0 degrees and 37.0 degrees according to the design of the vehicle lamp.

As shown in fig. 11, the cutoff region of the beam pattern formed by the light source unit rotating with the central axis as a reference may be formed as shown in fig. 12.

The optical portion 100 will be described below.

Referring again to fig. 1 and 2, as described above, the optical portion 100 may be formed of a plurality of optical members and a shielding member 110 blocking a part of the light emitted from the light source portion. Accordingly, as shown in fig. 15, the light emitted from the light source section 10 can form a light beam pattern P by the plurality of optical members and the shielding member 110. That is, the shielding member may be formed with an opening through which a part of light can pass.

Hereinafter, light emitted from the outer contour of the light source section 10 of the plurality of light sources, that is, the light source portion located farthest from the central axis Ax of the light source section is referred to as first light L1, and light emitted from the light source 12 located at the central axis Ax1 of the light source section 10 of the plurality of light sources 12 is referred to as second light L2. Therefore, the beam pattern P may be formed by the first light L1, the second light L2, and the like.

The plurality of optical members are arranged in the light traveling direction, and thus may be formed to be different from each other as shown in the drawing. The plurality of optical members may include a first optical member 120, a second optical member 130, a third optical member 140, a fourth optical member 150, a fifth optical member 160, and a sixth optical member 170 in this order in the traveling direction of the light emitted from the light source unit 10. The case where the number of optical components is 6 is described as an example, but the number may be changed according to the design of the vehicle lamp. Also, the sizes of the first to sixth optical members 120 to 170 may be formed to be different from each other, and are not limited to the sizes and shapes shown in the drawings.

For example, first, third, fourth, and sixth

optical members

120, 140, 150, and 170 may be formed of converging optical members, and second and fifth

optical members

130 and 160 may be formed of diverging optical members. Wherein, when the parallel light enters the incident surface of the optical component and is emitted from the emitting surface of the optical component to a place, the optical component is a converging optical component; in the case where parallel light enters an incident surface of an optical member and diverges at an exit surface of the optical member, the optical member is a diverging optical member.

Like the light beam pattern P of the present invention, in order to improve the visibility of the driver, there is a feature that the center of the light beam pattern P is relatively brighter than the outer side according to vehicle regulations and performance. With respect to glare prevention against dazzling of an oncoming vehicle or a pedestrian, there is a limitation regulation mostly in the center of a beam pattern. Therefore, it is important to form a beam pattern capable of improving the resolution performance and maintaining the central brightness of the beam pattern by shielding the contour light of a predetermined portion without shielding the light toward the center of the beam pattern.

The vehicle lamp according to the embodiment of the invention can gradually shield light from the center of the light source portion toward the outer contour using the first optical member (first optical member) and the sixth optical member (last optical member). That is, the degree of shielding of light irradiated from the light source section can be adjusted by adjusting the diameters of the first optical member (first optical member) and the sixth optical member (last optical member). For example, if the diameter of the optical member is made smaller, the shading degree increases in the outer shape, and if the diameter of the optical member is made larger, the shading degree decreases in the outer shape, and the shading degree is adjusted by adjusting the diameters of the first optical member (first optical member) and the sixth optical member (last optical member) because the influence of the shading degree on the first optical member (first optical member) and the sixth optical member (last optical member) is relatively large.

For example, as described below with reference to fig. 14 and 17, a beam pattern formed according to whether light is blocked or not is described.

Fig. 14 is a diagram illustrating a first example optical system configured as follows: the diameter of the No. 1 optical component on which light is incident is 13mm or more, and the diameter of the No. 3 optical component as the last optical component is 30mm or more;

FIG. 15 is a diagram illustrating a beam pattern and a shadow band formed by a first example optical system; fig. 16 is a diagram illustrating the dark belt S with reference to 300 cd.

Fig. 17 is a diagram illustrating a second example optical system configured as follows: the diameter of the optical member No. 1 on which light is incident is less than 13mm, and the diameter of the optical member No. 3 as the last optical member is less than 30 mm; FIG. 18 is a diagram illustrating a beam pattern and a shadow band formed from a second example optical system; fig. 19 is a diagram illustrating the dark belt S with reference to 300 cd.

Comparing fig. 14 and 17, it can be confirmed that the second example optical system in which the optical member No. 1 and the optical member No. 3 are formed relatively small is shielded more in part of the light generated in the light source portion outline than the first example optical system. As a result, it was confirmed that the shadow band S was formed more clearly in the second exemplary optical system. That is, when the light receiving angle of the first light is reduced by the light source unit 10, the sharpness of the beam pattern and the brightness of the center of the beam pattern can be effectively improved.

Fig. 20 to 22 are diagrams exemplarily illustrating a path of the first light passing through a central portion of the opening of the shielding member according to a position of the shielding member of the present invention.

At least a part of the first light may travel through a central portion of the opening of the shielding member. As shown in fig. 20, in the case where the shielding member 110 is provided adjacent to the position of the light source section 10, the size of the last optical member of the plurality of optical members along the first optical path L1 may become large, and the sharpness, i.e., the luminance efficiency, of the light beam pattern P may be lowered, and as shown in fig. 21, in the case where the shielding member 110 is located in the vicinity of the last optical member, the size of the first optical member 120 may become large, and it may be difficult to control the light beam pattern.

Therefore, as shown in fig. 22, the blocking member 100 according to the embodiment of the present invention is preferably provided near the center of the optical portion. I.e., between the third optical member 140 and the fourth optical member 150.

Accordingly, the second light L2 emitted from the central axis Ax of the light source unit 10 of the present invention can be diffused by the optical member near the shielding member according to the positions of the plurality of optical members and the shielding member 110. In order to effectively form the beam pattern P of the present invention, the second light L2 should be irradiated with parallel light. In order to form the divergent second light L2 into parallel light, the second light L2 should be refracted to be converged, and thus an optical member located behind the shielding member with reference to the light traveling direction may be formed as the largest optical member. That is, the fourth optical member 150 may be formed to be the largest among the plurality of optical members.

Finally, the second light L2 is diverged to the largest optical component among the plurality of optical components by the shielding member 110, and after passing through the largest optical component, is converged to the last optical component in the traveling direction of the light among the plurality of optical components, and after passing through the last optical component, parallel light may be formed. The second light L2 may be formed to have the largest angle with the central axis among the lights emitted from the light source unit. I.e. the angle of light reception

May be maximized.

Specifically, the second light L2 may diverge away from the central axis Ax while passing through the first optical member 120, the second optical member 130, and the third optical member 140 until reaching the fourth optical member 150, and converge close to the central axis Ax by the fourth optical member 150 and the fifth optical member 160, and be formed as parallel light after passing through the sixth optical member 170.

In addition, the light receiving angle according to the second light

And the diameter of the light source unit 10, the diameter of the parallel light emitted from the sixth optical member 170 can be determined.

Specifically, it can be determined by the following mathematical formula 1.

[ mathematical formula 1]

In this case, the amount of the solvent to be used,

θ represents the angle formed by the first light L1 emitted from the sixth optical portion and the central axis Ax, i.e., the angle of the light beam pattern, Y represents the diameter of the light source portion 10, and D1 represents the diameter of the parallel light. The diameter of the parallel light is the diameter of an area through which the parallel light passes, and the sixth optical member is an optical member located last among the plurality of optical members with reference to the light traveling direction.

Therefore, if the size of the LED is determined, the diameter D1 of the parallel light is determined, and accordingly, there is a limitation in reducing the size of the sixth optical member 170, and thus the shielding member 110 may be provided to reduce the size of the sixth optical member 170.

In addition, the shielding member may be formed as a diaphragm.

A ratio of a first length B formed in the central axis direction from the center of the light source section to the first optical member 120 and a diameter D2 of the first optical member 120 according to an embodiment of the present invention may be defined between 0 and 1.

Specifically, the diameter D2 of the first optical member 120 may be determined according to the first length B, and the minimum acceptance angle of light that can be used as a product of an existing light source is 45 degrees. Therefore, the diameter D1 of the first optical member that can be formed according to the minimum light-receiving angle can be derived as a trigonometric function.

However, the light source unit 10 may have an outer shape that emits light at a minimum light receiving angle, and the diameter D2 of the first optical member 120 should be equal to or greater than a value obtained by a trigonometric function. The incident surface of the first optical element 120 may be formed to be any one of a spherical surface, an aspherical surface, and a planar surface.

According to the conditions as described above, in the case where the incident surface of the first optical member 120 is a plane, the radius X of the first optical member 120 that can be formed to be the smallest may be the same as the first length B, and therefore, the ratio E between the first length B and the diameter D2 of the first optical member may be 0.5 according to the following mathematical expression.

B＝X,D2＝2X,

Where B is the first length, D2 is the diameter of the first optical member that can be made the smallest, and E represents the ratio between the first length and the diameter of the first optical member.

In the case where the incident surface of the first optical member 120 is a spherical surface, when the radius of the first optical member is half of the first length B when the radius of the first optical member is the smallest, the ratio between the first length and the first optical member at this time can be found to be 1 according to the following formula.

B＝2X,D2＝2X,

Here, B denotes a first length, D2 denotes a diameter of the first optical member that can be formed to be the smallest, and E denotes a ratio between the first length and the diameter of the first optical member.

And, the first length may be 0.

In summary, as described above, the ratio E of the first length B to the diameter D2 of the light source section 10 may be formed between 0 and 1.

The plurality of light sources of the present invention emit light, and also emit central light that passes through the central portion of the opening of each shielding member 110 and outside light that passes through the opening of the shielding member at the farthest distance from the central light. That is, the first light and the second light may include a central light and an outer light, respectively.

At this time, according to the above-described matters, as the position of the light source is away from the center of the light source section 10, the angle formed by emitting the center light and the outside light may tend to become gradually smaller. Therefore, the definition of the beam pattern and the brightness of the center of the beam pattern can be effectively improved. Here, the angle formed by the central light and the outside light may be formed as an angle formed by the central light and the outside light before entering the optical portion. That is, the angle formed by the central light and the outside light formed before entering the first optical member 120.

Therefore, the light receiving angle of the first light emitted from the outer periphery of the light source unit 10 can be made smaller than the light receiving angle of the second light emitted from the central axis of the light source unit 10.

Fig. 23 is a diagram showing expansion or contraction of the optical members according to temperature, fig. 24 is a diagram showing beam paths formed according to the number of plastic optical members, and fig. 25 is a diagram showing beam paths formed according to converging and diverging plastic optical members.

The plurality of optical components of the vehicle lamp according to the embodiment of the invention may include a plurality of optical components formed using the first material and a plurality of optical components formed using the second material. The plurality of optical members formed of the second material expand or contract more depending on temperature than the plurality of optical members formed of the first material. When the optical member expands and contracts depending on temperature, a phenomenon in which the curvature, thickness, refractive index, and the like change and the focal point moves may occur.

For example, the first material may be formed using glass and the second material may be formed using plastic, in which case the optical component formed using plastic may be affected by temperature relatively more than the optical component formed using glass. Specifically, as shown in fig. 23 (a), in the case of normal temperature, the plastic optical member does not contract or expand, and thus the focal point does not move. When the temperature is high, the plastic optical member expands as shown in fig. 23 (b), and when the temperature is low, the plastic optical member contracts as shown in fig. 23 (c), so that the focal point can be changed.

The number of the plurality of optical members of the second material which are more contracted and expanded with such a temperature change may be formed to be 0 or even number. As shown in fig. 24 (a), in the case where the plastic optical component and the glass optical component are provided at 1:1, the plastic optical component expands more and cannot be compensated as described above. In contrast, as shown in (b) of fig. 24, in the case where 2 plastic optical parts are formed so that the number of plastic optical parts is provided in an even number, the degrees of expansion can be compensated for each other, so that the influence caused by the temperature can be reduced.

However, as shown in fig. 25 (a), if the plastic optical components are each configured as a converging or diverging optical component, the aberration may not be corrected, so that as shown in fig. 25 (b), half of the even number is formed by the converging optical component and the remaining half is formed by the diverging optical component so that the number of the diverging optical components and the number of the converging optical components are made the same in the ratio of 1:1, whereby the aberration can be corrected.

Therefore, in the case where a part of the plurality of optical members according to the embodiment of the present invention is formed of plastic, it is possible to provide an even number, and the converging optical member and the diverging optical member are formed in the same ratio, so that the sharpness of the beam pattern can be improved.

For example, first optical member 120, second optical member 130, third optical member 140, and fourth optical member 150 may be formed of glass, and fifth optical member 160 and sixth optical member 170 may be formed of plastic. In this case, as described above, the fifth optical member 160 may be formed as a diverging optical member, and the sixth optical member 170 may be formed as a converging optical member.

Based on the above, the lamp for a vehicle according to the embodiment of the present invention can effectively form a light beam pattern with a bright center and high definition.

As described above, even in the case where the aberration that varies with temperature is corrected by adjusting the number of the divergent optical members, the number of the convergent optical members, the ratio of the number of the divergent optical members to the number of the convergent optical members, and the like, glare may occur in a dark zone of the beam pattern to cause dazzling of the driver of the preceding vehicle. Accordingly, the present invention can prevent dazzling of a driver of a preceding vehicle by reducing glare and effectively forming a dark belt by controlling the light amount of the light source part 10.

Referring to fig. 26, in the case of reducing or extinguishing the light amount of at least one of the plurality of light sources 12 of the light source section 10, as shown in (a) of fig. 26, a dark belt may be formed at the beam pattern P. However, as described above, the curvature, thickness, refractive index, and the like of the optical member vary with temperature, so that glare may occur in a dark band.

Accordingly, as shown in fig. 26 (b), the light amount of the light source in the area around the shadow band in the region where the light beam pattern (P) is formed can be reduced. That is, the glare is formed by the light amount of the light source around the light source controlled to form the dark belt, so that the glare can be reduced by: the amount of light of at least one light source that is closest to the light source controlled for forming the dark belt is reduced.

At this time, in the case where the reduction amount of the glare is not sufficient even if the light amount of the adjacent light source is reduced, as shown in fig. 26 (c), the light amount of the adjacent light source which is reduced may be further reduced or extinguished, and the light amount of the light source which is controlled to form the dark band may be further reduced or extinguished, whereby the light source section 10 may be controlled so that the dark band S area of the beam pattern P becomes larger.

Finally, by controlling the light amount of the light source section 10 according to the temperature change, the beam pattern P and the dark belt S can be efficiently formed as shown in fig. 15.

It will be appreciated 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. The embodiments described above are therefore exemplary in all respects, and should be understood as not limiting. The scope of the present invention is defined not by the above detailed description but by the appended claims, and all changes and modifications that can be derived from the meaning and range described in the claims and the equivalent concepts thereof should be construed as being included in the scope of the present invention.

Claims

1. A lamp for a vehicle, comprising:

a light source unit that emits light; and

an optical portion that guides the light,

wherein the light source part includes a plurality of light sources arranged in a matrix shape,

the light source section includes a plurality of optical members arranged in a traveling path direction of the light,

light emitted from the plurality of light sources passes through the optical portion to form a beam pattern,

wherein the plurality of optical components include a plurality of optical components formed using a first material and a plurality of optical components formed using a second material,

the plurality of optical members formed of the second material expand or contract more depending on temperature than the plurality of optical members formed of the first material,

the plurality of optical members formed of the second material are formed in an even number, half of the even number being formed of an optical member that condenses light, and the remaining half being formed of an optical member that diverges light.

2. The vehicular lamp according to claim 1, wherein,

in the light source section, the plurality of light sources are arranged spaced apart from each other.

3. The vehicular lamp according to claim 1, wherein,

the light source unit includes a partition wall positioned between the plurality of light sources to partition the plurality of light sources.

4. The vehicular lamp according to claim 1, wherein,

the plurality of light sources respectively include a chip that controls the amount of light of the light and a phosphor that emits the light.

5. The vehicular lamp according to claim 1, wherein,

the light source is sized to have a diameter of 100 μm or less.

6. The vehicular lamp according to claim 1, wherein,

the lateral length of the light source part is formed to be greater than the vertical length of the light source part.

7. The vehicular lamp according to claim 6, wherein,

the ratio of the lateral length to the vertical length of the light source portion is formed to be 4: 1.

8. The vehicular lamp according to claim 1, wherein,

the number of the light sources is more than 1000.

9. The vehicular lamp according to claim 1, wherein,

the beam pattern forms at least one of a low beam pattern, a high beam pattern, and a signal light pattern.

10. The vehicular lamp according to claim 1, wherein,

forming a dark band in the beam pattern with at least one of the plurality of light sources extinguished.

11. The vehicular lamp according to claim 1, wherein,

the light source unit is formed to rotate with a central axis as a reference and to be inclined at a predetermined angle.

12. The vehicular lamp according to claim 11, wherein,

the angle is formed to be any one of 0.0 to 37.0 degrees.

13. The vehicular lamp according to claim 1, wherein,

light emitted from each of the plurality of light sources forms a pixel beam pattern contained in the beam pattern,

the size of the pixel beam pattern emitted from the light source becomes larger as the position of the light source is farther from the central axis of the light source section.

14. The vehicular lamp according to claim 1, wherein,

the light beam pattern is formed corresponding to an image in which a light emission image of the light source unit is inverted up and down and/or left and right.

15. The vehicular lamp according to claim 1, wherein,

the optic further includes: and a shielding member disposed at least one of the plurality of optical members and blocking a portion of light emitted from the light source section in such a manner that brightness of the light beam pattern becomes darker as being farther from a center of the light beam pattern.

16. The vehicular lamp according to claim 15, wherein,

the shielding member is located near the center of the optical portion.

17. The vehicular lamp according to claim 15, wherein,

the largest optical member of the plurality of optical members is located behind the shielding member with reference to the light traveling direction.

18. The vehicular lamp according to claim 15, wherein,

the first light emitted from the most outer contour portion from the central axis of the light source portion passes through the center of the shielding member.

19. The vehicular lamp according to claim 15, wherein,

each of the plurality of light sources emits a central light that passes through a central portion in the opening portion of the shielding member and an outer light that is farthest from the central light and passes through the opening portion of the shielding member,

further, as the position of the light source is farther from the central axis of the light source unit, the angle formed by the central light and the outside light becomes smaller.

20. The vehicular lamp according to claim 1, wherein,

the second light among the lights emitted from the light source section diverges to the largest optical member among the plurality of optical members and converges in the light traveling direction after passing through the largest optical member, forming parallel lights after passing through the last optical member.

21. The vehicular lamp according to claim 20, wherein,

the second light is light having a largest angle with respect to a central axis of the light source unit among the light emitted from the light source unit.

22. The vehicular lamp according to claim 1, wherein,

the plurality of optical components formed of the second material are formed of plastic.

23. The vehicular lamp according to claim 1, wherein,

the plurality of optical members include a first optical member adjacent to the light source portion,

an incident surface of the first optical member on which the light is incident is formed as any one of a spherical surface, an aspherical surface, and a planar surface.

24. The vehicular lamp according to claim 23, wherein,

the ratio between a first length from the light source section to the incident surface of the first optical member and the diameter of the first optical member is defined to be between 0 and 1.

25. The vehicular lamp according to claim 15, wherein,

the plurality of optical members include a first optical member, a second optical member, a third optical member, a fourth optical member, a fifth optical member, and a sixth optical member in this order in a traveling direction of light emitted from the light source unit,

the shielding member is located between the third optical member and the fourth optical member.

26. The vehicular lamp according to claim 25, wherein,

the second light emitted from the central axis of the light source unit diverges away from the central axis of the light source unit while passing through the first, second, and third optical members, is condensed close to the central axis of the light source unit by the fourth and fifth optical members, and is formed into parallel light after passing through the sixth optical member.

27. The vehicular lamp according to claim 1, wherein,

with the optical member arranged at the position closest to the light source section and the optical member arranged at the position farthest from the light source section among the plurality of optical members, light is gradually shielded from the center of the light source section toward the outer contour.

28. The vehicular lamp according to claim 1, wherein,

the light source section is controlled to form a dark belt in the beam pattern and to reduce the amount of light of at least one adjacent light source forming a peripheral area of the dark belt in the beam pattern area.

29. The vehicular lamp according to claim 28, wherein,

the light source section is controlled to enlarge the shadow band region.