CN116677951A

CN116677951A - LED fog lamp

Info

Publication number: CN116677951A
Application number: CN202310846622.5A
Authority: CN
Inventors: 龙涛; 查磊; 黄玉春; 黄帆
Original assignee: Supervision Laser Technology Suzhou Co ltd
Current assignee: Supervision Laser Technology Suzhou Co ltd
Priority date: 2023-07-11
Filing date: 2023-07-11
Publication date: 2023-09-01

Abstract

The application discloses an LED fog lamp, which comprises an LED light source group and a fog lamp lens corresponding to the LED light source group, wherein the LED light source group comprises a plurality of LED chips which are sequentially arranged, the fog lamp lens comprises an incident surface and an emergent surface, the emergent surface is an arc surface which is arched towards one side far away from the incident surface, the emergent surface comprises a first body and a second body which are tightly connected, the first body and the second body are in height difference at the connection position to form a connection surface, and the cut-off line of light distribution formed by light beams emitted by the LED light source group after passing through the first body almost coincides with the cut-off line of light distribution formed by light beams emitted by the LED light source group after passing through the second body. Through setting up the fog lamp lens of this kind of structure, when LED light source group includes a plurality of LED chips, also accessible first body and second body form clear cut-off line respectively, and two kinds of cut-off lines near the coincidence to the distribution of finally forming also has clear cut-off line, has improved the illuminating effect.

Description

LED fog lamp

Technical Field

The application relates to the technical field of semiconductor illumination, in particular to an LED fog lamp.

Background

With the progress of LED technology, LED light source groups are widely used in fog lamps, front lamps and other vehicle lamp products. The simplest LED fog lamp can be realized by only one LED light source group and one plastic lens, and the prior common LED fog lamps are respectively disclosed in the patents with publication numbers of CN107543118A and CN 206944062U. However, in the automotive field, there are special requirements for the light, for example fog lamps, which generally require light distribution at angles of greater than 40 degrees and have a clear cut-off line. In the fog lamp in the prior art, the design of the lens is carried out based on the point light source, in order to enable the fog lamp lens to form a clear cut-off line, the fog lamp lens can only be generally adapted to an LED chip with a small size, and once the area of a light source of the LED is overlarge, the clear cut-off line can become fuzzy, even is not horizontal, and cut-off lines at the left side and the right side can be upturned.

Disclosure of Invention

Aiming at the defects existing in the prior art, the application provides the LED fog lamp with clear cut-off line and good lighting effect.

In order to solve the technical problems, the technical scheme of the application is as follows: the utility model provides a LED fog lamp, includes LED light source group and with the fog lamp lens that LED light source group corresponds, LED light source group includes a plurality of LED chips that arrange in proper order, fog lamp lens includes incident surface and exit surface, the exit surface is the cambered surface that arches to the one side of keeping away from the incident surface, the exit surface includes closely connected first body and second body, first body and second body exist the difference in height at the junction and form the junction surface, the light beam that LED light source group sent is passed through the light distribution's that forms behind the first body bright and dark cut-off line and the light distribution's that forms behind the second body bright and dark cut-off line near the coincidence.

Further, the length of the fog lamp lens is larger than the height and the width, and the LED chips in the LED light source group are arranged along the length direction of the fog lamp lens.

Further, the connecting surface of the first body and the second body is parallel to the length direction of the fog lamp lens.

Further, the LED light source group is formed by sequentially arranging a plurality of LED chip groups with different color temperatures.

Furthermore, the fog lamp lens is made of glass materials.

Further, the fog lamp lens is provided with a mounting platform.

Further, the incident surface is a plane or a concave surface.

Further, the incident surface is a concave cylindrical surface, the circular arc edge of the concave cylindrical surface is along the length direction of the fog lamp lens, and the straight edge is along the width direction of the fog lamp lens.

Further, the LED lamp further comprises a spherical reflecting cup positioned between the LED light source group and the fog lamp lens, wherein the LED light source group is positioned at the spherical center of the spherical reflecting cup, and the top of the spherical reflecting cup is provided with a light outlet corresponding to the fog lamp lens.

Further, the light outlet is elliptical or rectangular, wherein the long side direction is parallel to the length direction of the fog lamp lens, and the short side direction is parallel to the width direction of the fog lamp lens.

The application provides an LED fog lamp, which comprises an LED light source group and a fog lamp lens corresponding to the LED light source group, wherein the LED light source group comprises a plurality of LED chips which are sequentially arranged, the fog lamp lens comprises an incident surface and an emergent surface, the emergent surface is a cambered surface arched towards one side far away from the incident surface, the emergent surface comprises a first body and a second body which are tightly connected, a connecting surface is formed by the height difference of the first body and the second body at the connecting position, and the cut-off line of the light distribution formed by the light beams emitted by the LED light source group after passing through the first body almost coincides with the cut-off line of the light distribution formed by the light beams emitted by the LED light source group after passing through the second body. Through setting up the fog lamp lens of this kind of structure, when LED light source group includes a plurality of LED chips, forms clear cut-off line through first body and second body respectively, and two kinds of cut-off lines near the coincidence to the distribution of finally forming also has clear cut-off line, has improved the illuminating effect.

Drawings

Fig. 1 is a schematic diagram of a structure of an LED fog lamp according to the present application in embodiment 1;

fig. 2a and 2b are light distribution patterns formed by the first body and the second body in embodiment 1, respectively;

fig. 2c is a schematic diagram of the light distribution superposition in fig. 2a, 2 b;

FIG. 3 is a schematic view of a structure of an LED fog lamp of the present application in embodiment 2;

fig. 4 is a schematic diagram of a structure of an LED fog lamp of the present application in embodiment 4.

The figure shows: 10. an LED light source group; 110. an LED chip; 111. a white light LED chip; 112. a yellow LED chip; 20. a fog lamp lens; 210. an incidence surface; 220. an exit surface; 221. a first body; 222. a second body; 223. a connection surface; 310. a first cutoff line; 320. a second cutoff line; 40. a mounting platform; 50. spherical reflecting cup; 510. and a light outlet.

Detailed Description

The present application will be described in detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1, the present application provides an LED fog lamp, which includes an LED light source group 10 and a fog lamp lens 20 corresponding to the LED light source group 10, where the LED light source group 10 includes a plurality of LED chips 110 arranged in sequence, the fog lamp lens 20 includes an incident surface 210 and an exit surface 220, the exit surface 220 is an arc surface that arches toward a side far from the incident surface 210, the exit surface 220 includes a first body 221 and a second body 222 that are tightly connected, a height difference exists between the first body 221 and the second body 222 at a connection position to form a connection surface 223, the connection surface 223 is a plane, and a cutoff line of a light distribution formed by a light beam emitted by the LED light source group 10 after passing through the first body 221 nearly coincides with a cutoff line of a light distribution formed by passing through the second body 222. In this embodiment, taking the case that the first body 221 is higher than the second body 222 at the connection position, the light distribution formed by the light beam emitted by the LED light source group 10 after passing through the first body 221 is shown in fig. 2a, the light distribution formed by the light beam emitted by the LED light source group 10 after passing through the second body 222 is shown in fig. 2b, the light distribution formed by the light beam emitted by the LED light source group 10 after passing through the second body is also shown in fig. 2b, the light distribution formed by the light distribution after overlapping the light distribution is shown in fig. 2c, and it can be seen that the final light distribution also has a clear light cut-off line. With the fog lamp lens 20 of such a structure, when the LED light source group 10 includes a plurality of LED chips 110, the formed light distribution also has a clear cutoff line, and the illumination effect is improved.

Preferably, the LED light source group 10 of the present application preferably has a multi-chip LED lamp bead with an elongated light emitting surface, for example, 3, 4 or 5 LED chips 110 may be connected in series, wherein the long side of the elongated light source surface is parallel to the length direction of the fog lamp lens 20, so that the light distribution with wide left-right divergence angle is more easily formed.

As shown in fig. 1, the length of the fog lamp lens 20 is greater than the height and width, and the plurality of LED chips 110 in the LED light source group 10 are arranged along the length direction of the fog lamp lens 20. Specifically, in order to more clearly explain the technical scheme, an xyz three-dimensional coordinate system is established, wherein the x direction is the length direction, the y direction is the width direction, and the z direction is the height direction. Wherein the length is greater than the height and the width, the plurality of LED chips 110 in the LED light source group 10 are arranged in the length direction, so that a light distribution having a wider left-right divergence angle can be generated, here, left and right directions, i.e., directions parallel to the length direction of the fog lamp lens 20.

Preferably, the connecting surface 223 of the first body 221 and the second body 222 is located at the middle of the fog lamp lens 20, and the connecting surface 223 is parallel to the length direction of the fog lamp lens 20, at this time, the light emitted by the LED light source group 10 can generate the first cutoff line 310 through the lower edge corresponding to the connecting surface 223 of the first body 221, and at the same time, the LED light source group 10 can generate the second cutoff line 320 through the upper edge corresponding to the connecting surface 223 of the second body 222, so that the two cutoff lines almost coincide. In this embodiment, the height difference between the first body 221 and the second body 222 gradually increases from the middle to the two sides, and there may be no height difference or only a small height difference in the middle area, so that the fog lamp lens 20 is convenient to manufacture by adopting the structure. Of course, the first body 221 and the second body 222 may have a significant height difference in the middle region, such as the same height difference along the length direction, which is not limited in the present application.

Preferably, the fog lamp lens 20 is made of a glass material or a PMMA (polymethyl methacrylate ) or PC (Polycarbonate) material. Wherein a glass lens made of a glass material has the following advantages over lenses made of optical plastics such as PMMA and PC materials:

optical properties: glass lenses have higher light transmittance and lower optical scattering. They are more efficient at transmitting and focusing light, providing a clearer, brighter lighting effect, especially in foggy or severe weather conditions.

Heat resistance: glass lenses generally have high heat resistance and can be kept stable in high temperature environments. This is important for fog lamps, which are required to withstand high temperatures, because the lamp generates a considerable amount of heat.

Weather resistance: the glass lens has better weather resistance and can resist ultraviolet rays, high humidity and chemical substance corrosion. This results in a longer service life for the glass lens in outdoor environments and in severe weather conditions.

Scratch resistance: glass lenses, in contrast, are generally more scratch resistant than acrylic or PC materials. This is due to the higher hardness of the glass, which is better able to resist surface scratches and abrasion.

Stability: the glass lens has higher stability, and is not easy to deform or change shape. This helps to ensure that the optical performance of the luminaire remains stable over long periods of use.

Of course, glass lenses are relatively brittle and are prone to breakage. This may in some cases require additional protective measures, such as the use of a suitable protective cover or housing in the vehicle light.

In summary, glass lenses generally have more excellent optical properties, heat resistance, weather resistance and scratch resistance in fog lamp manufacturing, but there is a trade-off between vulnerability and risk of breakage. The choice of materials should be made with a combination of specific application requirements, safety and cost factors.

Currently, the conventional fog lamp lens 20 is usually manufactured by using optical plastic as a material, and the plastic can be injection molded, so that the design freedom is more and the curved surface modeling is easier. However, in high power LED fog lamp lenses, there is a risk of thermal resistance, weather resistance, and stability of the plastic. By utilizing the technical scheme of the application, the design of the lens can be completely carried out by adopting glass materials.

Preferably, the fog lamp lens 20 is provided with a mounting platform 40, and the mounting platform 40 may be disposed on two sides of the fog lamp lens 20 along the length direction, or may be disposed on a circle of the fog lamp lens 20 near the periphery of the incident surface 210, for fixing or clamping the fog lamp lens 20.

Preferably, the incident surface 210 is a plane or a concave surface, wherein when the incident surface is a concave surface, it is preferably a concave cylindrical surface, and the circular arc edge of the concave cylindrical surface is along the length direction of the fog lens 20, and the straight edge is along the width direction of the fog lens 20.

Example 2

As shown in fig. 3, unlike embodiment 1, in this embodiment, the LED light source group 10 is formed by sequentially arranging a plurality of LED chip sets with different color temperatures, in fig. 3, two LED chip sets with different color temperatures are taken as an example, each LED chip set is respectively provided with 3 LED chips, the LED chips are closely arranged to form one LED bead, the two LED beads are arranged side by side to form a strip shape, for example, a 6500K high color temperature white LED chip 111 and a 3200K low color temperature yellow LED chip 112 are respectively adopted, the two LED chip sets are arranged to form a 1*6 strip shape, and the smaller the gap between the two chip sets is, the better. When the high-color temperature LED chip is lightened, white light is output; when the low color temperature LED chip is lighted, yellow light is output. Of course, it is also possible to illuminate two LEDs of different color temperatures simultaneously to obtain higher brightness. By adopting the technical scheme of the application, the light output of different color temperatures can be realized by means of one fog lamp lens, and the output light of different color temperatures not only has the same light distribution, but also has the same cut-off line, so that the lighting effect is better.

Example 3

As shown in fig. 4, unlike embodiments 1-2, the LED fog lamp in this embodiment further includes a spherical reflecting cup 50 located between the LED light source group 10 and the fog lamp lens 20, the LED light source group 10 is located at the center of the spherical reflecting cup 50, and the top of the spherical reflecting cup 50 is provided with a light outlet 510 corresponding to the fog lamp lens 20. Since the refractive index of the fog lamp lens 20 is relatively low, the collection and utilization efficiency of the LED output light by a single lens is not high. In order to improve the light energy utilization efficiency, a spherical reflecting cup 50 is disposed in front of the LED light source unit 10, and the center of the spherical reflecting cup 50 coincides with the center of the LED light source unit 10, so that the light emitted from the LED light source unit 10 in a wide angle range is reflected by the spherical reflecting cup 50 and then returns to the LED light source unit 10. The light returned to the LED light source group 10 can be projected onto the fog lamp lens 20 after being diffusely reflected by the LED chip 110, so that the light energy utilization efficiency of the LED can be improved, and the brightness of the LED light source can be improved. In order to further match with the fog lamp lens, the light outlet 510 of the spherical reflecting cup 50 may be designed into an oval shape or a rectangle shape, the long side direction of the light outlet is parallel to the length direction of the fog lamp lens 20, and the short side direction is parallel to the width direction of the fog lamp lens 20, so that the light cone output from the light outlet 510 is matched with the size of the fog lamp lens 20, the adaptation efficiency is highest, and a wider light spot distribution can be formed, so that the light distribution requirement of the fog lamp can be met.

Although embodiments of the present application have been described in the specification, these embodiments are presented only, and should not limit the scope of the present application. Various omissions, substitutions and changes in the form of examples are intended in the scope of the application.

Claims

1. The utility model provides a LED fog lamp, includes LED light source group and with the fog lamp lens that LED light source group corresponds, its characterized in that, LED light source group includes a plurality of LED chips that arrange in proper order, fog lamp lens includes incident surface and exit surface, the exit surface is the cambered surface that arches to the one side of keeping away from the incident surface, the exit surface includes closely connected first body and second body, first body and second body exist the difference in height at the junction and form the junction surface, the light beam that LED light source group sent is passed through the light distribution's that forms behind the first body bright-dark cut-off line and the light distribution's that forms behind the second body bright-dark cut-off line near the coincidence.

2. The LED fog lamp of claim 1, wherein the length of the fog lamp lens is greater than the height and the width, and wherein the plurality of LED chips in the LED light source group are arranged along the length of the fog lamp lens.

3. The LED fog lamp of claim 2, wherein the connection surface of the first body and the second body is parallel to the length direction of the fog lamp lens.

4. The LED fog lamp of claim 1, wherein the LED light source group is formed by sequentially arranging a plurality of LED chip groups having different color temperatures.

5. The LED fog lamp of claim 1 wherein the fog lamp lens is made of a glass material.

6. The LED fog lamp of claim 5, wherein the fog lamp lens is provided with a mounting platform.

7. The LED fog lamp of claim 1 wherein the incident surface is planar or concave.

8. The LED fog lamp of claim 7, wherein the incident surface is a concave cylindrical surface, the circular arc edge of the concave cylindrical surface is along the length direction of the fog lamp lens, and the straight edge is along the width direction of the fog lamp lens.

9. The LED fog lamp of claim 1, further comprising a spherical reflector positioned between the LED light source set and the fog lamp lens, wherein the LED light source set is positioned at the center of the spherical reflector, and the top of the spherical reflector is provided with a light outlet corresponding to the fog lamp lens.

10. The LED fog lamp of claim 9 wherein the light outlet is oval or rectangular, wherein the long side direction is parallel to the length direction of the fog lamp lens and the short side direction is parallel to the width direction of the fog lamp lens.