KR102719075B1 - lamp for vehicle - Google Patents

Abstract

A vehicle lamp according to an embodiment of the present invention includes a light source unit that generates light and an optical unit that guides the light, wherein the light source unit includes a plurality of light sources arranged in a matrix shape and the optical unit includes a plurality of optical members arranged in the direction of the light movement path, and light generated from the plurality of light sources can pass through the optical unit to form a beam pattern.

Description

lamp for vehicle

The present invention relates to a vehicle lamp, and more particularly, to a vehicle lamp that forms a high-resolution beam pattern through a plurality of light sources and a plurality of optical members and shielding members.

In general, vehicles are equipped with various types of lamps that have a lighting function to easily identify objects located around the vehicle when driving at night and a signaling function to inform other vehicles and road users of the vehicle's driving status.

For example, head lamps and fog lamps are mainly for lighting purposes, and turn signal lamps, tail lamps, brake lamps, side markers, etc. are for signaling purposes. The installation standards and specifications for these vehicle lamps are stipulated by law to ensure that each function is fully realized.

Among vehicle lamps, headlamps play a very important role in safe driving as they form low beam or high beam patterns to ensure the driver's forward vision when driving in dark environments such as at night.

These vehicle lamps may be provided as a single lamp module with headlamps selectively forming a low beam pattern or a high beam pattern depending on the presence of a shield member, or the headlamps forming a low beam pattern and the headlamps forming a high beam pattern may be provided as separate lamp modules.

Vehicle lamps are usually maintained in a low beam pattern to prevent glare to drivers of oncoming vehicles or preceding vehicles traveling in the opposite direction. When driving at high speeds or in dark places, they form a high beam pattern as needed to ensure safe driving.

Accordingly, recently, adaptive driving beam (ADB) headlamps have been provided, which automatically adjust the light illumination angle, brightness, width and length of the lamp when an oncoming vehicle or a preceding vehicle is detected while driving with the high beam pattern formed, thereby avoiding causing glare to the driver of the oncoming vehicle or preceding vehicle.

However, if a shadow zone is formed in the beam pattern to avoid causing glare to the driver according to the above configuration, shadow zones may be formed in many areas of the formed beam pattern, making it difficult to secure a forward view efficiently.

Korean Patent Publication No. 2015-0118669 (October 23, 2015)

The problem to be solved by the present invention is to provide a vehicle lamp that forms a high-resolution beam pattern.

The present invention relates to a vehicle lamp having a low beam pattern and a beam pattern forming a shadow zone.

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

A vehicle lamp according to an embodiment of the present invention includes a light source unit that generates light and an optical unit that guides the light, wherein the light source unit includes a plurality of light sources arranged in a matrix shape and the optical unit includes a plurality of optical members arranged in the direction of the light movement path, and light generated from the plurality of light sources can pass through the optical unit to form a beam pattern.

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

By forming more than 1,000 light sources into a light source section, a high-resolution beam pattern can be formed.

When the light source is rotated about the central axis of the light source so that one side of the light source is tilted, the cutoff area of the low beam pattern can be efficiently formed.

By shielding some of the light generated from the optical source and the optical aberrations by the shielding member, a beam pattern with a bright center and high resolution can be formed.

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

FIG. 1 is a drawing illustrating a vehicle lamp according to an embodiment of the present invention.
FIG. 2 is a drawing showing a cross-sectional view of a vehicle lamp according to an embodiment of the present invention.
FIG. 3 is a drawing illustrating a beam pattern of a vehicle lamp according to an embodiment of the present invention.
FIG. 4 is a drawing illustrating a part of a light source portion of a vehicle lamp according to an embodiment of the present invention.
FIG. 5 is a drawing showing a light source of a light source unit according to an embodiment of the present invention.
FIG. 6 is a drawing showing a pixel beam pattern formed by a partition according to an embodiment of the present invention.
FIG. 7 is a drawing showing a pixel beam pattern formed when there is no bulkhead according to an embodiment of the present invention.
FIG. 8 is a drawing showing the first to third pixel beam patterns of the present invention.
FIG. 9 is a drawing showing a light source unit with some of the light sources turned off according to an embodiment of the present invention.
Figure 10 is a drawing showing a cut-off area formed by a light source unit.
Figure 11 is a drawing showing a light source unit according to an embodiment of the present invention rotated around a central axis.
Figure 12 is a drawing showing a cut-off area formed by a rotated light source.
FIG. 13 is a drawing showing a light path generated from a light source unit of a vehicle lamp according to an embodiment of the present invention.
Figure 14 is a drawing showing the first example optical system before shielding.
Figure 15 is a drawing showing a beam pattern formed by the first example optical system.
Figure 16 is a drawing showing a shadow zone formed by the first example optical system.
Figure 17 is a diagram showing a second example shielded optical system.
Figure 18 is a drawing showing a beam pattern formed by the second example optical system.
Figure 19 is a drawing showing a shadow zone formed by the second example optical system.
Figures 20 to 22 are schematic drawings illustrating the path of the first light according to the position of the shielding member of the present invention.
Figure 23 is a drawing showing that an optical element expands or contracts depending on temperature.
Figure 24 is a drawing showing a beam path formed according to the number of plastic optical elements.
Figure 25 is a drawing showing a beam path formed according to a converging plastic optical member and a diverging plastic optical member.

The advantages and features of the present invention, and the methods for achieving them, will become clear with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and the present embodiments are provided only to make the disclosure of the present invention complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

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

The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless the context clearly dictates otherwise. The terms “comprises” and/or “comprising,” as used herein, are used to mean that they do not exclude the presence or addition of one or more other elements, steps, and/or operations other than the mentioned elements, steps, and/or operations. In addition, “and/or” includes each and every combination of one or more of the mentioned items.

In addition, the embodiments described in this specification will be explained with reference to perspective views, cross-sectional views, side views, and/or schematic drawings, which are ideal examples of the present invention. Accordingly, the form of the examples may be modified due to manufacturing techniques and/or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms illustrated, but also include changes in form created according to the manufacturing process. In addition, in each drawing illustrated in the embodiments of the present invention, each component may be illustrated to some extent enlarged or reduced for convenience of explanation.

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

FIG. 1 is a drawing illustrating a vehicle lamp according to an embodiment of the present invention, FIG. 2 is a drawing illustrating a cross-sectional view of a vehicle lamp according to an embodiment of the present invention, FIG. 3 is a drawing illustrating a beam pattern of a vehicle lamp according to an embodiment of the present invention, and FIG. 4 is a drawing illustrating a part of a light source portion of a vehicle lamp according to an embodiment of the present invention.

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

The light source unit (10) may include a plurality of light sources arranged in a matrix shape, and the optical unit may include a plurality of optical elements arranged in the direction of the light movement path. The light source (12) may be formed to generate light having a light quantity or color suitable for the purpose of the vehicle lamp of the present invention, and an LED (Light Emitting Diode) semiconductor light-emitting element may be used. The optical element may be formed by at least one of a lens, a mirror, and a prism.

Accordingly, light generated from multiple light sources can pass through the optical section to form a beam pattern (P) as shown in Fig. 3.

Meanwhile, a vehicle lamp according to an embodiment of the present invention can form at least one of a low beam pattern, a high beam pattern, and a communication beam pattern in the beam pattern illustrated in FIG. 3, and can form a shadow zone in the beam pattern by turning off or controlling at least one of a plurality of light sources. For example, at least some of the plurality of light sources can be controlled or turned off by a control unit (not shown) provided inside the vehicle to form a low beam pattern, and in order to prevent glare from the driver of a detected preceding or opposite vehicle, the control unit can control at least one light source of the light source unit to form a shadow zone in a portion of the beam pattern corresponding to the position of the detected driver.

The beam pattern (P) of the present invention can be formed corresponding to an image in which the light-emitting image of the light source unit (10) is inverted up, down, left, and right. For example, when the light-emitting surface of the light source unit (10) is formed as an image in which some of the plurality of light sources (12) are turned off as shown in FIG. 4(a), the beam pattern (P) can be formed corresponding to an light-emitting image of the light source unit (10) that includes a shadow zone (S) and is inverted up, down, left, and right as shown in FIG. 4(b). In addition, when the beam pattern (P) is formed as the light-emitting image of the light source unit (10) is inverted up, down, left, and right, the number of optical elements included in the optical unit (100) can be reduced, thereby reducing the overall size of the vehicle lamp. The black portion of FIG. 4 is a light source turned off area.

Hereinafter, the light source unit (10) and optical unit (100) of the present invention will be described in detail, and the light source will be described first.

The light source unit (10) may be formed of 1,000 or more light sources to form a high-resolution beam pattern, and the size of each light source (12) may be formed to be 100 μm or less. The light generated 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 it passes through the optical unit (100), and the size of the pixel beam pattern (PP) may be linked to the size of the light source (12). Since the resolution increases as the size of the pixel beam pattern decreases, when the size of the light source is formed to be small as in the present invention, the resolution of the pixel beam pattern (PP) can be increased. If the size of the light source exceeds 100 μm, the size of the pixel beam pattern increases, which may lower the required resolution and the size of the lamp may also increase. Furthermore, the size of the light source according to the embodiment of the present invention may be formed to be 60 μm or less.

In addition, when the number of light sources is 1000 or more, the size of the pixel beam pattern generated by each light source is formed to be 0.25 degrees or less, so that the ADB, the cut-off area of the low beam pattern, and the communication lamp can be efficiently formed and controlled. When the number of light sources (12) included in the light source unit (10) is less than 1000, the size of each light source (12) becomes large, so that the high resolution of the pixel beam pattern may not be formed as described above. Furthermore, the number of light sources according to the embodiment of the present invention may be formed to be 10000 or more.

Meanwhile, the width of the light source unit (10) according to the embodiment of the present invention may be formed to be larger than the height of the light source unit. In other words, the width and height ratio may be formed to exceed 1:1. In an automobile optical system, the beam pattern (P) is usually formed at 40 degrees left and right and 10 degrees up and down, so it is preferable that the width and height ratio of the light source unit (10) be formed to be 4:1.

FIG. 5 is a drawing showing a light source of a light source unit according to an embodiment of the present invention, and FIG. 6 is a drawing showing a pixel beam pattern formed by each light source according to an embodiment of the present invention.

As illustrated in FIG. 5(a), the light source unit (10) may further include a partition wall (14) positioned between the plurality of light sources (12) to separate the plurality of light sources from each other, and each of the plurality of light sources (12) may include an LED chip (12a) that controls the amount of light and a fluorescent substance (12b) that emits light. In the past, as illustrated in FIG. 5(b), a single block of fluorescent substance (12b) was applied on a plurality of LED chips (12a), whereas in the light source unit (10) of the present invention, a plurality of fluorescent substances (12b) are provided corresponding to the number of LED chips (12a), so that the 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).

In this way, since each light source is equipped with a chip (12a) and a fluorescent substance (12b) and a partition wall (14) exists between the light sources, as shown in Fig. 6, the occurrence of glare can be controlled in the pixel beam pattern (PP), and the size at which the fluorescent substance (12b) is excited can be defined and limited by the partition wall (14). In addition, since the glare shape can be controlled, a beam pattern (P) including a shadow zone and a cut-off area of a low beam pattern can be efficiently formed, thereby forming a high-resolution beam pattern.

If there is no partition (14) between multiple light sources (12), glare may occur in the pixel beam pattern (PP0) generated by the light sources as shown in Fig. 7, so that the beam pattern is not clear and interference may occur. Accordingly, beam patterns such as the shadow zone and the cut-off area of the low beam pattern cannot be efficiently formed.

Meanwhile, the size of the pixel beam pattern (PP) according to the embodiment of the present invention may be formed to become larger as it gets farther away from the center of the beam pattern. Specifically, the sizes of pixel beam patterns located within a 5-degree area of the beam pattern may be almost similar, and the sizes of pixel beam patterns included in areas outside a 5-degree area of the beam pattern may be formed to be larger than the sizes of pixel beam patterns located within a 5-degree area.

For example, FIG. 8 is a drawing showing the first to third pixel beam patterns of the present invention.

The size of the pixel beam pattern may be formed to increase toward the outer periphery of the beam pattern of the present invention. For example, as illustrated in FIG. 8, the size of the first pixel beam pattern (PP1) formed at the center of the beam pattern is 0.1 degrees, and the sizes of the second pixel beam pattern (PP2) and the third pixel beam pattern (PP3) formed at the outer periphery of the beam pattern are 0.11 degrees and 0.12 degrees, respectively, so that the size of the pixel beam pattern may increase toward the outer periphery of the beam pattern.

As the size of the pixel beam pattern decreases, the brightness and resolution increase, and as the size of the pixel beam pattern increases, the brightness and resolution decrease relatively. In addition, since the center of the beam pattern requires a relatively higher resolution than the periphery, the hot zone performance is improved by making the size of the pixel beam pattern at the center of the beam pattern smaller, and the spread performance is improved by making the size of the pixel beam pattern at the periphery of the beam pattern relatively larger.

Meanwhile, as described above, in order to form a cut-off area of a beam pattern by a light source formed of a plurality of LED chips, a plurality of light sources forming a cut-off area can be partially turned off.

In this case, it is possible to increase the number of light sources that are turned off in the downward direction from the light source area corresponding to the cut-off area as in Fig. 9(a), but since the slope formed by the turned-off area may be formed at 45 degrees, it may not satisfy the regulation for the cut-off area. Therefore, as in Fig. 9(b), the number of light sources that are turned off is increased by 2, so that the angle formed by the turned-off area of the light source is formed at approximately 26 degrees, so that the cut-off area of the beam pattern can be formed. The black part in Fig. 9 is the turned-off area in the light source.

The cut-off area of the beam pattern can be formed as shown in Fig. 10 by the light source unit shown in Fig. 9(b).

Even if the number of light sources to be turned off is increased by one as in Fig. 9(a), if the light source unit (10) is rotated around the central axis (Ax) of the light source unit (10) as in Fig. 11 so that part or all of the light source unit is tilted, a cut-off area applicable to regulations can be efficiently formed. Specifically, the angle of rotation and tilting can be formed between 0 degrees and 37.0 degrees depending on the design of the vehicle lamp.

The cut-off area of the beam pattern formed by the light source unit rotated around the central axis as shown in Fig. 11 can be formed as shown in Fig. 12.

Below, the optical section (100) will be described.

FIG. 13 is a drawing showing a light path generated from a light source unit of a vehicle lamp according to an embodiment of the present invention.

Again, referring to FIGS. 1 and 2, the optical unit (100) may be formed of a plurality of optical elements and a shielding member (110) that blocks some of the light generated from the light source unit as described above. Accordingly, as illustrated in FIG. 15, the light generated from the light source unit (10) may pass through the plurality of optical elements and the shielding member (110) to form a beam pattern (P).

Hereinafter, among the plurality of light sources, the light generated from the light source located farthest from the outer edge of the light source unit (10), that is, the central axis (Ax) of the light source unit, is referred to as the first light (L1), and among the plurality of light sources (12), the light generated from the light source (12) located at the central axis (Ax1) of the light source unit (10) is referred to as the second light (L2). Accordingly, the beam pattern (P) can be formed by the first light (L1), the second light (L2), etc.

A plurality of optical elements may be arranged in the direction of light propagation and may be formed differently from each other as illustrated in the drawing. In addition, the plurality of optical elements may include a first optical element (120), a second optical element (130), a third optical element (140), a fourth optical element (150), a fifth optical element (160), and a sixth optical element (170) in the order of the direction of light propagation generated from the light source unit (10). Here, the number of optical elements is described as six for example, but the number may change depending on the design method of the vehicle lamp. In addition, the sizes of the first to sixth optical elements (170) may be formed differently from each other, and are not limited to the sizes and shapes illustrated in the drawing.

For example, the first optical member (120), the third optical member (140), the fourth optical member (150), and the sixth optical member (170) may be formed as converging optical members, and the second optical member (130) and the fifth optical member (160) may be formed as diverging optical members. Here, if parallel light is incident on the incident surface of the optical member and is emitted toward one point from the exit surface of the optical member, the optical member is a converging optical member, and if parallel light is incident on the incident surface of the optical member and is diverged from the exit surface of the optical member, the optical member is a diverging optical member.

In order to improve driver visibility, such as the beam pattern (P) of the present invention, the center of the beam pattern (P) must be relatively brighter than the outside, depending on automobile laws and performance. Most glare laws that prevent glare to oncoming vehicles or pedestrians are located at the center. Therefore, it is important to form a beam pattern that can increase resolution performance and maintain the brightness of the center of the beam pattern by partially blocking the outside light without blocking the light directed to the center of the beam pattern.

According to an embodiment of the present invention, a vehicle lamp can gradually block light from the center of a light source portion to the periphery by using a first optical member (first optical member) and a sixth optical member (last optical member). That is, it is possible to control the degree of blocking of light irradiated from a light source portion by adjusting the diameters of the first optical member (first optical member) and the sixth optical member (last optical member). For example, when the diameters of the optical members are made smaller, the degree of blocking increases from the periphery, and when the diameters of the optical members are made larger, the degree of blocking decreases from the periphery. However, since the first optical member (first optical member) and the sixth optical member (last optical member) have relatively large effects on the degree of blocking, the degree of blocking is controlled by adjusting the diameters of the first optical member (first optical member) and the sixth optical member (last optical member).

For example, let us explain the beam pattern formed depending on whether or not light is shielded through Figs. 14 and 17 as follows.

FIG. 14 is a drawing showing a first exemplary optical system in which the diameter of the first optical element through which light is incident is 13 or more and the diameter of the third optical element, which is the last optical element, is 30 or more, FIG. 15 is a drawing showing a beam pattern and a shadow zone formed in the first exemplary optical system, and FIG. 16 is a drawing showing a shadow zone (S) based on 300 cd.

FIG. 17 is a drawing showing a second exemplary optical system in which the diameter of the first optical element through which light is incident is less than 13 and the diameter of the third optical element, which is the last optical element, is less than 30. FIG. 18 is a drawing showing a beam pattern and a shadow zone formed in the second exemplary optical system, and FIG. 19 is a drawing showing a shadow zone (S) based on 300 cd.

Comparing FIGS. 14 and 17, it can be seen that the second example optical system, in which the optical elements 1 and 3 are formed relatively small, shields some of the light generated from the periphery of the light source unit more than the first example optical system. As a result, it can be seen that the shadow zone (S) is formed more clearly in the second example optical system. That is, when the light-receiving angle of the first light in the light source unit (10) is reduced, the resolution of the beam pattern and the brightness of the center of the beam pattern can be efficiently improved.

Figures 20 to 22 are schematic drawings illustrating the path of the second light according to the position of the shielding member of the present invention.

At least one of the first optical elements may pass through the center portion of the shielding member. As illustrated in FIG. 20, when the shielding member (110) is positioned close to the position of the light source unit (10), the size of the last optical element among the plurality of optical elements may be turned on along the first optical path (L1), so that the resolution and brightness efficiency of the beam pattern (P) may be reduced, and as illustrated in FIG. 21, when the shielding member (110) is positioned near the last optical element, the size of the first optical element (120) may be increased, so that it may be difficult to control the beam pattern.

Therefore, it is preferable that the shielding member (110) according to the embodiment of the present invention be provided near the center of the optical member as illustrated in Fig. 22. That is, it can be located between the third optical member (140) and the fourth optical member (150).

Accordingly, the second light (L2) generated from the central axis (Ax) of the light source unit (10) of the present invention can be diverged by the optical elements near the shielding element due to the positions of the plurality of optical elements and the shielding element (110). In order to efficiently form the beam pattern (P) of the present invention, the second light (L2) must be irradiated as parallel light. In order to form the diverged second light (L2) as parallel light, the second light (L2) must be refracted to converge, so that the optical element located next to the shielding element based on the light propagation direction can be formed as the largest optical element. That is, the fourth optical element (150) can be formed as the largest among the plurality of optical elements.

In the end, the second light (L2) is diverged to the largest optical element among the plurality of optical elements by the shielding member (110), penetrates the largest optical element, converges to the optical element located last in the light propagation direction among the plurality of optical elements, penetrates the last optical element, and is formed into parallel light. The second light (L2) can be formed as the light that forms the largest angle with the central axis among the light generated from the light source unit. In other words, the light reception angle ( ) can be the largest.

Specifically, the second light (L2) passes through the first optical element (120), the second optical element (130), and the third optical element (140) until it reaches the fourth optical element (150), diverges away from the central axis (Ax), converges toward the central axis (Ax) by the fourth optical element (150) and the fifth optical element (160), and can be formed into parallel light after passing through the sixth optical element (170).

Meanwhile, the light receiving angle of the second light ( ) and the diameter of the light source (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.

Here is the light reception angle of the second light (L2), represents the angle formed by the first light (L1) emitted from the sixth optical element and the central axis (Ax), i.e., the angle of the beam pattern, Y represents the diameter of the light source unit (10), and D1 represents the diameter of the parallel light. The diameter of the parallel light is the diameter of the area through which the parallel light passes, and the sixth optical element is the optical element located last among the plurality of optical elements based on the direction of light propagation.

Accordingly, when the size of the LED is determined, the diameter D1 of the parallel light is determined, and accordingly, the size of the sixth optical element (170) can be reduced, but there is a limit, so the size of the sixth optical element (170) can be reduced by providing a shielding element (110).

Meanwhile, the shielding member can be formed as an aperture.

According to an embodiment of the present invention, a ratio of a first length (B) formed in the direction of the central axis from the center of the light source to the first optical member (120) and a diameter (D2) of the first optical member (120) can be formed between 0 and 1.

Specifically, the diameter (D2) of the first optical member (120) can be determined according to the first length (B), and the minimum light receiving angle that can be used as a product of the current light source is 45 degrees. Accordingly, the diameter (D2) of the first optical member that can be formed according to the minimum light receiving angle can be obtained using a trigonometric function.

However, since light can be generated at a minimum light-receiving angle even at the outer periphery of the light source unit (10), the diameter (D2) of the first optical member (120) must be formed to be greater than a value obtained by trigonometric function. In addition, the incident surface of the first optical member (120) can be formed as any one of a spherical surface, an aspherical surface, and a flat surface.

According to the conditions above, when the incident surface of the first optical member (120) is a plane, the minimum diameter (D2) of the first optical member (120) that can be formed can be equal to the first length (B), so the ratio (E) between the first length (B) and the diameter (D2) of the first optical member can be 0.5 as follows.

Here, B is the first length, D2 is the diameter of the first optical element that can be formed at a minimum, and E represents the ratio between the first length and the first optical element.

When the incident surface of the first optical element (120) is spherical, the minimum diameter of the first optical element is half the first length (B), and at this time, the thickness of the first optical element is formed as 0. When the optical element surface is spherical and the radius of curvature is half the first length while the light receiving angle is fixed, the minimum condition is reached, and at this time, the ratio between the first length and the first optical element can be 1 in the following equation.

Here, B is the first length, D2 is the minimum diameter of the first optical element that can be formed, and E represents the ratio between the first length and the first optical element.

Additionally, the first length can be 0.

In summary of the above situation, as described above, the ratio (E) of the first length (B) and the diameter (D2) of the light source portion (10) can be formed between 0 and 1.

FIG. 23 is a drawing showing that an optical element expands or contracts depending on temperature, FIG. 24 is a drawing showing a beam path formed depending on the number of optical elements, and FIG. 25 is a drawing showing a beam path formed depending on a converging optical element and a diverging optical element.

The plurality of optical elements of the vehicle lamp according to the embodiment of the present invention may include a plurality of optical elements formed of a first material and a plurality of optical elements formed of a second material. In addition, the plurality of optical elements formed of the second material may expand and contract at least more than the plurality of optical elements formed of the first material due to temperature. When the optical elements expand and contract depending on temperature, the curvature, thickness, refractive index, etc. may change, causing a phenomenon in which the focus shifts.

For example, the first material may be glass and the second material may be formed of plastic, in which case the optical member formed of plastic may be relatively more affected by temperature than the optical member formed of glass. Specifically, as shown in Fig. 23(a), when the temperature is normal, the plastic optical member does not shrink or expand, so the focus does not shift. 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 focus may change.

The number of the plurality of optical elements of the second material, which contract and expand a lot according to the temperature change, can be formed as 0 or an even number. As shown in Fig. 24(a), when the plastic optical element and the glass optical element are provided in a 1:1 ratio, as described above, the plastic optical element expands more and is not compensated. On the other hand, as shown in Fig. 24(b), when formed with two plastic optical elements and the number of plastic optical elements is provided as an even number, the degree of mutual expansion can be compensated, so the influence of temperature can be reduced.

However, as illustrated in Fig. 25(a), if all plastic optical elements are composed of converging or diverging optical elements, aberrations may not be corrected. Therefore, as illustrated in Fig. 25(b), the ratio of the number of diverging optical elements to the number of converging optical elements is 1:1, so that half of the even numbers are formed as converging optical elements and the remaining half are formed as diverging optical elements, thereby correcting aberrations.

Therefore, when a plurality of optical elements according to an embodiment of the present invention are formed partly of plastic, they may be provided in even numbers, but the resolution of the beam pattern may be increased by forming the converging optical elements and the diverging optical elements in the same ratio.

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

According to the above, the vehicle lamp according to the embodiment of the present invention can efficiently form a beam pattern with a bright center and high resolution.

A person having ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical idea or essential characteristics thereof. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

10: Light source 12: Light source
100: Optical section 110: Shielding member
120: First optical element 130: Second optical element
140: Third optical element 150: Fourth optical element
160: 5th optical element 170: 6th optical element

Claims (30)

A light source that generates light;
Including an optical section that guides the light,
The above light source unit includes a plurality of light sources arranged in a matrix shape.
The optical section includes a plurality of optical elements arranged in the direction of the light movement path,
Light generated from the above multiple light sources passes through the optical section to form a beam pattern,
The above plurality of optical elements includes a plurality of optical elements formed of a first material and a plurality of optical elements formed of a second material,
The above first material is a glass material, and the above second material is a plastic material.
A plurality of optical members formed of the above first material are:
Positioned closer to the light source unit than the plurality of optical members formed of the second material,
The number of optical elements formed from the second material is formed as an even number, and half of the even number are formed as converging optical elements that allow light to converge, and the remaining half are formed as diverging optical elements that allow light to diverge.
The above diverging optical element is,
A vehicle lamp that corrects aberrations caused by shrinkage or expansion of the above-described convergent optical element due to temperature changes. In the first paragraph,
The above light source part
A vehicle lamp in which the above-mentioned plurality of light sources are spaced apart from each other. In the first paragraph,
The above light source part
A vehicle lamp including a baffle positioned between the plurality of light sources to separate the plurality of light sources. In the first paragraph,
A vehicle lamp, wherein each of the plurality of light sources includes a chip that controls the amount of light and a phosphor that emits the light. In the first paragraph,
A vehicle lamp in which the size of the light source is formed to be 100μm or less. In the first paragraph,
A vehicle lamp in which the width of the light source portion is formed larger than the height of the light source portion. In Article 6,
A vehicle lamp in which the width and height ratio of the light source portion is formed as 4:1. In the first paragraph,
A vehicle lamp having 1,000 or more of the above multiple light sources. In the first paragraph,
A vehicle lamp wherein the beam pattern forms at least one of a low beam pattern, a high beam pattern and a communication beam pattern. In the first paragraph,
A vehicle lamp in which a shadow zone is formed in the beam pattern when at least one of the plurality of light sources is turned off. In the first paragraph,
A vehicle lamp in which the above light source is formed by rotating around a central axis and tilting at a certain angle. In Article 11,
A vehicle lamp formed at an angle between 0 and 37.0 degrees. In the first paragraph,
Light generated from each of the above plurality of light sources forms a pixel beam pattern included in the beam pattern,
A vehicle lamp in which the size of a pixel beam pattern generated from the light source increases as the position of the light source moves away from the central axis of the light source portion. In the first paragraph,
A vehicle lamp in which the above beam pattern is formed corresponding to an image in which the light-emitting image of the light source part is inverted up, down, left, and right. In the first paragraph,
The above optical part
A vehicle lamp further comprising a shielding member arranged at least in one of the plurality of optical members and blocking some of the light generated from the light source unit so that the brightness of the beam pattern becomes darker as it moves away from the center of the beam pattern. In Article 15,
A vehicle lamp wherein the above shielding member is located near the center of the optical section. In Article 15,
A vehicle lamp in which the largest optical element among the plurality of optical elements is positioned next to the shielding element based on the direction of light propagation. In Article 15,
A vehicle lamp in which the first light generated at the outermost point from the central axis of the light source passes through the center of the shielding member. In the first paragraph,
A vehicle lamp in which the angle formed between the central axis and the path of light generated at the light source unit becomes smaller as the position of the light generated from the light source unit gets farther away from the central axis of the light source unit. In the first paragraph,
A vehicle lamp in which the second light generated from the central axis of the light source part among the light generated from the light source part is diverged to the largest optical element among the plurality of optical elements, converges in the light propagation direction after passing through the largest optical element, and is formed into parallel light after passing through the last optical element. In Article 19,
The second light is a vehicle lamp in which the light generated from the light source has the largest angle with the central axis. delete In the first paragraph,
A vehicle lamp in which a plurality of optical elements formed of the second material expand and contract more than a plurality of optical elements formed of the first material due to temperature. delete delete In the first paragraph,
The above plurality of optical elements include a first optical element closest to the light source unit,
A vehicle lamp, wherein the incident surface of the first optical member onto which the light is incident is formed as any one of a spherical surface, an aspherical surface, and a flat surface. In Article 26,
A vehicle lamp, wherein a ratio (B/D2) of a first length (B) from the light source to the incident surface of the first optical member and a diameter (D2) of the first optical member is formed between 0 and 1. In Article 15,
The above plurality of optical elements include a first optical element, a second optical element, a third optical element, a fourth optical element, a fifth optical element, and a sixth optical element in the order of the direction of light propagation generated from the light source unit.
A vehicle lamp wherein the shielding member is positioned between the third optical member and the fourth optical member. In Article 28,
A vehicle lamp in which the second light generated from the central axis of the light source portion passes through the first optical member, the second optical member, and the third optical member, diverges away from the central axis of the light source portion, converges by the fourth optical member and the fifth optical member to approach the central axis of the light source portion, and is formed into parallel light after passing through the sixth optical member. In the first paragraph,
A vehicle lamp that gradually blocks light from the center of the light source to the periphery by using an optical member positioned closest to the light source and an optical member positioned farthest from the light source among the plurality of optical members.

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