KR20200000567U - LED search light lens and LED search light using the same - Google Patents

Abstract

As a replacement for KW halogen searchlights, we present a 150W class LED searchlight with optimal size that satisfies 800,000 cd of central light intensity and 6 ° directivity, and a condensing lens employed therein. The proposed condensing lens is a 150W class LED searchlight condensing lens, and the condensing lens is arranged with a plurality of condensing lenses corresponding to each LED light source of a COB method. Each condenser lens includes a body including a refracting surface and a TIR surface spaced apart from the refracting surface formed in the light incident hole of the yaw shape, and the body of the body to maintain a constant distance between the light emitting surface of each LED light source and the condensing lens. It includes a plurality of legs formed on the side, and a flange formed on the outer periphery of the other side of the body for easy seating when installed on the LED searchlight.

Description

Condenser lens for LED search light and LED search light using it {LED search light lens and LED search light using the same}

The present invention relates to a condenser lens for an LED searchlight and an LED searchlight using the same, and more particularly, to a condensing lens of a 150W class LED searchlight that can replace a 1KW halogen searchlight and an LED searchlight using the same.

The search light is a luminaire that illuminates light at a long distance, and in order to have improved light distribution characteristics at a certain distance, a reflecting plate can be used to adjust the directivity angle.

However, in the case of an LED having a wide light distribution characteristic, a condenser lens or a parabolic mirror is essential to adjust the directivity angle. This can be applied to LEDs in various fields by minimizing light loss and adjusting the directivity depending on the usage of the lighting.

The condenser lens can be designed using a TIR lens as shown in FIG. 1. The TIR (Total Internal Reflection) lens is a lens using total internal reflection, and has high luminous flux efficiency because there is almost no reflection loss in the total reflection surface. Through the optimal design of the refractive surface (1) and the TIR surface (TIR surface) (2) of the TIR lens, it is possible to design a high center luminance and a desired directivity angle.

Among the methods for focusing the divergent LED light, the TIR lens converts the divergent light into parallel light by collimating technology and focuses it toward the irradiation area as shown in FIG. 2.

Currently, a light collecting lens having a diameter of about 50 mm or less is used for a search light employing such a light collecting lens. This will be useful when the power consumption of the searchlight COB LED is very low. Here, the COB LED means a COB (Chip On Board) type LED.

However, in the case of manufacturing a 150W class LED searchlight that replaces 1KW halogen searchlight, the size of the COB LED as a light source must also be somewhat large, and accordingly, the size of the condenser lens should be made larger.

However, since the material of the condensing lens is mostly plastic, when the large condensing lens is injected, shrinkage is more severe than that of the small condensing lens. For this reason, it was difficult to obtain a desired directivity angle and central luminance while using a 150W class COB LED as a light source.

As described above, it is impossible to obtain a desired directivity angle and central luminance while using a 150W class COB LED as a light source by increasing the size of the blind COB LED and increasing the size of the condenser lens.

Accordingly, there is a need for a converging lens for an LED searchlight that is optimally sized to obtain a desired directivity angle and a central brightness while using a 150W class COB LED as a light source while minimizing shrinkage deformation during injection of a large condensing lens.

Prior Art 1: Republic of Korea Patent No. 10-1849771 (TIR LED lens and its design method) Prior art 2: Republic of Korea Patent No. 10-1452217 (Led searchlight for searchlight) Prior Art 3: Republic of Korea Patent Publication No. 10-2015-0145937 (3D illumination lens design method through optimization algorithm in semi-parallel light lens with total internal reflection structure) Prior Art 4: Korean Registered Patent No. 10-1262302 (Searchlight lighting device equipped with integrated LED) Prior art 5: Republic of Korea Patent Publication No. 10-2015-0081088 (lighting lens) Prior Art 6: Korean Registered Patent No. 10-1568267 (Line design type LED condensing module including condensing lens optical system for integrated control of multiple light sources)

The present invention has been proposed to solve the above-mentioned conventional problems, and replaces 1KW halogen searchlight, the optimal size of 150W LED searchlight that satisfies 800,000 cd of central light intensity and 6 ° of directivity, and a condensing lens employed therein. The purpose is to provide.

In order to achieve the above object, a condenser lens for an LED searchlight according to a preferred embodiment of the present invention is a 150W class LED searchlight condensing lens,

The condensing lens has a plurality of condensing lenses corresponding to each LED light source of the COB method, and each condensing lens includes a refracting surface formed in a light incident hole of a yaw shape and a TIR surface spaced apart from the refracting surface. ; A plurality of legs formed on one side of the body to maintain a constant distance between the light exit surface of each LED light source and the condensing lens; And a flange formed on the outer periphery of the other side of the body to be easily seated when installed in the LED searchlight, wherein the diameter of the light exit surface on the other side of the body is 166.6 mm, and the thickness of the body Is 51 to 52 mm, and the thickness of the leg is 2 to 4 mm.

The plurality of condensing lenses may be composed of three, and may be arranged in a triangle so that the center spacing of each other is kept constant.

The light exit surface on the other side of the torso is preferably flat.

The size of each LED light source may be 8.6 ~ 9mm.

The LED searchlight according to a preferred embodiment of the present invention, 150W class LED searchlight,

In order to satisfy the target orientation angle within 6 ° and the central light intensity of 800,000 cd or more, a plurality of condensing lenses are arrayed to correspond to each LED light source of the COB method, and each of the plurality of condensing lenses is in a yaw-shaped light incident A body including a refractive surface formed in the hole and a TIR surface spaced apart from the refractive surface; A plurality of legs formed on one side of the body to maintain a constant distance between the light exit surface of each LED light source and the corresponding condensing lens; And a flange formed on the outer periphery of the other side of the body to be easily seated when installed on the LED searchlight, wherein the diameter of the light exit surface on the other side of the body is 166.6 mm, and the thickness of the body Is 51 to 52 mm, and the thickness of the leg is 2 to 4 mm.

The power consumption of each LED light source may be 44.77W.

According to the present invention of such a configuration, it is possible to implement a 150W class LED searchlight of optimal size and a condensing lens employed therein, while replacing a 1KW halogen searchlight and satisfying a central brightness of 800,000cd and a 6 ° angle of view.

1 is a view showing the structure of a typical TIR lens.
FIG. 2 is a view showing the layout of the TIR lens shown in FIG. 1.
3 is a view showing a state in which a light collecting lens for an LED searchlight according to an embodiment of the present invention is arrayed.
4 is a view for explaining the structure of the light collecting lens shown in FIG. 3.
5 is a side cross-sectional view of FIG. 4.
6 is a view for explaining an LED searchlight employing a condenser lens according to an embodiment of the present invention.
FIG. 7 is a view of the LED searchlight shown in FIG. 6 viewed from above.
8 is a view showing a condensing lens according to an embodiment of the present invention installed on the LED searchlight.
9 to 14 are views showing simulation results for an LED searchlight using a condenser lens according to an embodiment of the present invention.

The present invention may be variously modified and have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail.

However, this is not intended to limit the present invention to specific embodiments, and it should be understood that all modifications, equivalents, and substitutes included in the spirit and scope of the present invention are included.

Terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "include" or "have" are intended to indicate the presence of features, numbers, steps, actions, components, parts or combinations thereof described herein, one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms, such as those defined in a commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. In describing the present invention, in order to facilitate the overall understanding, the same reference numerals are used for the same elements in the drawings, and redundant description of the same elements is omitted.

3 is a view showing a light collecting lens for an LED searchlight array according to an embodiment of the present invention, Figure 4 is a view for explaining the structure of the light collecting lens shown in Figure 3, Figure 5 is a view of Figure 4 It is a side sectional view.

First, the present invention is intended to replace the 1KW halogen searchlight, and aims to realize an LED searchlight using a 150W class COB LED as a light source and a condensing lens employed therein. Here, the COB LED means a COB (Chip On Board) type LED.

In particular, the present invention was intended to implement an LED searchlight that can satisfy a target orientation angle of 6 ° or more and a central luminance of 800,000 cd or more.

To this end, the present invention is arranged in a triangle so that the center distance of each other is 190 mm after manufacturing a single condenser lens 60 as shown in FIG. 3.

As described above, the total size (diameter) of the three condensing lenses 60 when arranged in a triangle so that the center distance between them is 190 mm is approximately 410 mm.

Here, each condenser lens 60 may be made of a plastic material or an optical glass material in consideration of optical properties and processability such as refractive index and transparency. For example, the condenser lens 60 adopts any one of a cyclo olefin polymer (COP) Zeonex E48R optical plastic, a polycarbonate (PC) resin Planet SP1516 optical plastic, and a cyclic olefin polymer APEL optical plastic. Or, it may be determined by a material selected from the group of optical thermoplastic plastics, silicones, or synthetic resins widely known in the art. In the embodiment of the present invention, the material of each condensing lens 60 is PMMA.

Each condensing lens 60, as shown in Figures 4 and 5, a body including a refracting surface (1) and a TIR surface (2) spaced apart from the refracting surface (1) formed in the light incident hole 25 of the yaw shape ( 10); A plurality of legs 20 formed on one side of the torso 10 to maintain a constant distance between the light exit surface of each opposing light source (ie, COB LED) (not shown) and the corresponding condensing lens; And a flange 30 formed on the outer periphery of the other side of the torso 10 to be easily seated when installed in the LED searchlight.

For an LED searchlight capable of satisfying a target orientation angle of 6 °, and a central luminance of 800,000 cd or more, which is a target in the present invention, each part of the condensing lens 60 as shown in FIG. 5 may be made as follows. have.

That is, the diameter (L1) of the light exit surface from the other side of the body 10 (i.e., except for the flange 30) is 166.6mm, and the thickness L2 of the body 10 (i.e., the legs 20 are excluded) ) Is 51 to 52 mm, the thickness (L3) of the leg 20 is 2 to 4 mm, and the diameter (L4) of one side (that is, the side where the light incident hole 25 is formed) of the body 10 is 91.19 mm , And the thickness L5 of the flange 30 is 2 to 3 mm, and the diameter L6 of the other side of the body 10 (that is, including the flange 30) is 176 mm.

And, in order to satisfy the target orientation angle of 6 ° or less and the central luminance of 800,000 cd or more, it is preferable that the light exit surface at least on the other side of the torso 10 is flat. If the light exit surface on the other side of the torso 10 is not flat and uneven, the target orientation value and the central luminance cannot be obtained as desired.

On the other hand, in order to satisfy the target target angle of incidence within 6 ° and the central luminance of 800,000 cd or more, the size (ie, diameter) of the light source (ie, COB LED) corresponding to each condenser lens 60 is 8.6 to 8. It is preferable to use 9 mm. For example, when the size of a light source (ie, COB LED) having a power consumption of approximately 44.77 W is 8.6 mm, the light efficiency is approximately 87.73 lm / w, and the total luminous flux may be approximately 3927.3 lm. Alternatively, when the size of the light source (ie, COB LED) having a power consumption of approximately 44.77W is 8.99 mm, the light efficiency is approximately 100.1 lm / w, and the total luminous flux may be approximately 4481,4 lm.

6 is a view for explaining an LED searchlight employing a condenser lens according to an embodiment of the present invention, FIG. 7 is a view looking at the LED searchlight shown in FIG. 6 from above, and FIG. 8 is an embodiment of the present invention It is a view showing the condensing lens according to the installed on the LED searchlight.

The LED searchlight according to an embodiment of the present invention includes a light tube 40 in which the light collecting lens 60 is accommodated, and a heat sink 50 connected to the bottom surface of the light tube 40 as shown in FIG. 6.

Here, the upper and lower surfaces of the barrel 40 are respectively opened, and a jaw portion 40a is formed in an annular shape on the upper inner surface of the barrel 40 to facilitate the seating of the condenser lens 60. That is, the flange 30 of the light collecting lens 60 is placed on the chin portion 40a.

A substrate on which a light source (ie, COB LED) is mounted may be in close contact with one surface of the heat sink 50 connected to the barrel 40. Usually the light source is mounted in the center of the substrate. Therefore, as shown in FIG. 7, when the tube 40 is viewed from above, a portion where the light source (ie, COB LED) is mounted will be seen.

Then, when the light collecting lens 60 is accommodated in the barrel 40, as in FIG.

Since the present design is to implement a 150W class LED searchlight that satisfies a target orientation angle of 6 ° or more and a central luminance of 800,000 cd or more, the LED searchlights described with reference to FIGS. 6 to 8 are finally grouped into three. It will be an LED searchlight.

Hereinafter, simulation results for the LED search light using the condenser lens according to an embodiment of the present invention will be described.

First, with reference to FIG. 9, the reason why the light exit surface at the other side of the torso 10 should be flat will be described.

The results of the present invention and the comparative examples presented in FIG. 9 are all arranged in a triangle so that the center distance of each other is 190 mm after manufacturing a single condenser lens 60 as shown in FIG. 3, but in each condenser lens 60 The diameter L1 of the light exit surface on the other side of the body 10 is 166.6 mm, the thickness L2 of the body 10 is 52 mm, the thickness L3 of the leg 20 is 3 mm, and the body ( The diameter L4 of one side of 10) is 91.19 mm, the thickness L5 of the flange 30 is 3 mm, and the diameter L6 of the other side of the body 10 is set to 176 mm. The thickness (L3) of the leg 20 is 3 mm means that the distance between the light exit surface of the light source (that is, COB LED) and the condensing lens is 3 mm. Then, the size of the light source (that is, COB LED) is set to be 8.6 mm.

As can be seen by looking at Figure 9, in the case where the light exit surface on the other side of the torso 10 is flat (see K) as in the present invention, the directivity angle is 4.83 °, and the central light intensity by one condensing lens Is 318,110 cd, and the central light intensity of the three condensing lenses is 954,330 cd, which satisfies the target target angle of inclination of 6 ° and the central light intensity of 800,000 cd or more.

On the other hand, as in Comparative Example 1, when the light exit surface on the other side of the torso 10 is uneven (see M), the directivity angle is 6.76 °, and the central brightness by one condensing lens is 174,200 cd. , The central luminosity by the three condensing lenses is 522,600 cd, so that it is not possible to satisfy the target orientation angle within 6 ° and the central luminosity of 800,000 cd or more.

In addition, as in Comparative Example 2, when the light exit surface on the other side of the torso 10 is uneven (see V), the directivity angle is 6.86 °, and the central light intensity by one condensing lens is 176,730 cd, The central luminosity of the three condensing lenses is 530,190 cd, which makes it impossible to satisfy the target orientation angle of 6 ° or more and the central luminosity of 800,000 cd or more.

Through this comparison, it can be seen that it is important that the light exit surface at the other side of the torso 10 should be flat.

10 and 11 are comparison results by adjusting only the distance between the light exit surface of the light source (ie, COB LED) and the condensing lens. Adjusting the distance between the light exit surface of the light source and the condensing lens means that the thickness L3 of the leg 20 of the condensing lens 60 was adjusted.

In FIGS. 10 and 11, the values of the remaining portions excluding the distance between the light exit surface of the light source and the condensing lens are assumed to use the values set in FIG. 9 described above.

When the distance between the light exit surface of the light source (that is, the exit surface of the COB LED) and the condensing lens is 3 mm, the directivity angle is 4.83 °, the central light intensity by one condensing lens is 318,110 cd, and three condensing lenses The central luminance by is 954,330 cd, which satisfies the target orientation angle of 6 ° and the central luminance of 800,000 cd or more.

When the distance between the light exit surface of the light source (i.e., the exit surface of the COB LED) and the condensing lens is 2 mm, the directivity angle is 5.26 °, the central light intensity by one condensing lens is 266,680 cd, and three condensing lenses The central luminous intensity by is 800,040 cd, which satisfies the target target orientation angle of 6 ° and the central luminous intensity of 800,000 cd or more.

When the distance between the light exit surface of the light source (i.e., the exit surface of the COB LED) and the condensing lens is 1 mm, the directivity angle is 6.15 °, the central light intensity by one condensing lens is 212,486 cd, and three condensing lenses The central luminosity by is 637,460 cd, which makes it impossible to satisfy the target orientation angle within 6 ° and the central luminosity of 800,000 cd or more.

When the distance between the light exit surface of the light source (i.e., the exit surface of the COB LED) and the condensing lens is 0 mm, the directivity is 7.44 °, the central light intensity by one condensing lens is 150,314 cd, and the three condensing lenses The central luminous intensity by is 450,940 cd, so that the target directional angle of 6 ° or less and the central luminous intensity of 800,000 cd or more cannot be satisfied.

On the other hand, when the distance between the light exit surface of the light source (that is, the exit surface of the COB LED) and the corresponding condensing lens is 4 mm, the directivity angle is 4.75 °, the central light intensity by one condensing lens is 311,030 cd, and 3 The central luminance by the condensing lens is 933,090 cd, which satisfies the target target orientation angle of 6 ° and the central luminance of 800,000 cd or more.

As a result, it can be seen that it is important to keep the distance between the light exit surface of the light source and the condensing lens at 2 to 4 mm in order to satisfy the target target orientation angle within 6 ° and the central light intensity of 800,000 cd or more.

12 is a result of comparison by adjusting the thickness (L2) of the body of the condensing lens.

In FIG. 12, the numerical values of the remaining parts excluding the thickness L2 of the condenser lens are assumed to be the values set in FIG. 9.

When the thickness (L2) of the condenser lens is 52 mm, the directivity angle is 4.82 °, and the central light intensity by the three condensing lenses is 955,740 cd, so that the target target orientation angle is within 6 ° and the central light intensity is 800,000 cd. Satisfies the ideal.

When the thickness (L2) of the condenser lens is 51.5 mm, the directivity angle is 4.82 °, and the central light intensity by the three condensing lenses is 955,740 cd, so that the target target orientation angle is within 6 ° and the central light intensity is 800,000. cd or higher is satisfied.

When the thickness (L2) of the condenser lens is 51 mm, the directivity angle is 4.82 °, and the central light intensity of the three condensing lenses is 955,740 cd, so that the target target orientation angle is 6 ° and the central light intensity is 800,000 cd. Satisfies the ideal.

As a result, it can be seen that it is desirable to maintain the thickness L2 of the body of the condensing lens at 51 to 52 mm in order to satisfy the target orientation angle within 6 ° and the central luminance of 800,000 cd or more.

13 and 14 are the results of comparing by adjusting the size of the light source (ie, COB LED). Even if the sizes of the light sources are different, the power consumption of the light sources of all sizes in FIGS. 13 and 14 is equal to 44.77 W, and the total luminous flux and light efficiency are only slightly different depending on the size. That is, the larger the size of the light source, the larger the value of total luminous flux and light efficiency.

In FIGS. 13 and 14, the numerical values of the remaining portions excluding the size of the light source are assumed to be the values set in FIG. 9 described above.

When the size of the light source is 8.6 mm, the directivity angle is 4.83 °, the central brightness by one condensing lens is 318,580 cd, and the central brightness by three condensing lenses is 955,740 cd, which is the target target angle of incidence 6 Within °, and the central luminance satisfies 800,000 cd or more.

When the size of the light source is 8.99mm, the directivity angle is 5.01 °, the central brightness by one condensing lens is 333,140cd, and the central brightness by three condensing lenses is 999,420cd, which is the target targeting angle 6 Within °, and the central luminance satisfies 800,000 cd or more.

When the size of the light source is 9mm, the directivity angle is 5.02 °, the central light intensity by one condenser lens is 291,320cd, and the central light intensity by three condenser lenses is 873,960cd, which is the target target angle of 6 °. Within, and the central luminance satisfies 800,000 cd or more.

When the size of the light source is 10mm, the directivity angle is 5.53 °, the central light intensity by one condenser lens is 236,420cd, and the center light intensity by three condenser lenses is 709,260cd, which is the target target angle of 6 °. Within, and the central luminance is not able to satisfy more than 800,000cd.

When the size of the light source is 10.4mm, the directivity angle is 5.75 °, the central luminance by one condensing lens is 218,630cd, and the central luminance by three condensing lenses is 655,890cd, which is the target target orientation angle 6 It is not possible to satisfy within 800 ° and the central light intensity of 800,000 cd or more.

When the size of the light source is 10.8mm, the directivity angle is 5.99 °, the central brightness by one condensing lens is 202,840cd, and the central brightness by three condensing lenses is 608,520cd, which is the target targeting angle 6 It is not possible to satisfy within 800 ° and the central light intensity of 800,000 cd or more.

When the size of the light source is 11mm, the directivity angle is 6.12 °, the central light intensity by one condenser lens is 195,540cd, and the central light intensity by three condenser lenses is 586,620cd, which is the target target angle of 6 °. Within, and the central luminance is not able to satisfy more than 800,000cd.

After all, in order to satisfy the targeted target orientation angle within 6 ° and the central luminance of 800,000 cd or more, it is important to set the size of the light source (ie, COB LED) corresponding to each condensing lens 60 to 8.6 to 9 mm. Can be seen.

As described above, the preferred embodiments have been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not intended to limit the scope of the invention as defined in the meaning or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: body 20: legs
30: flange 40: barrel
50: heat sink 60: condensing lens

Claims (9)

As a condenser lens of 150W LED searchlight,
The condensing lens is a plurality of condensing lenses corresponding to each LED light source of the COB method is arranged,
Each of the condensing lenses includes a body including a refractive surface formed in a light incident hole of a yaw shape and a TIR surface spaced apart from the refractive surface; A plurality of legs formed on one side of the body to maintain a constant distance between the light exit surface of each LED light source and the condensing lens; And a flange formed on the outer periphery of the other side of the body for easy seating when installed on the LED searchlight.
A condenser lens for an LED searchlight, characterized in that the diameter of the light exit surface on the other side of the body is 166.6 mm, the thickness of the body is 51-52 mm, and the thickness of the leg is 2-4 mm. The method according to claim 1,
The plurality of condensing lenses is composed of three, the LED search light condensing lens, characterized in that arranged in a triangle to maintain a constant distance between each other. The method according to claim 1,
A condenser lens for an LED searchlight, characterized in that the light exit surface on the other side of the body is flat. The method according to claim 1,
The size of each LED light source is 8.6 ~ 9mm, characterized in that the focusing lens for the LED searchlight. As a 150W LED searchlight,
In order to satisfy the target orientation angle within 6 ° and the central luminance of 800,000 cd or more, a plurality of condensing lenses are arrayed corresponding to each LED light source of the COB method,
Each of the plurality of condensing lenses includes a body including a refracting surface formed in a light incident hole of a yaw shape and a TIR surface spaced apart from the refracting surface; A plurality of legs formed on one side of the body to maintain a constant distance between the light exit surface of each LED light source and the condensing lens; And a flange formed on the outer periphery of the other side of the body for easy seating when installed on the LED searchlight.
LED searchlight, characterized in that the diameter of the light exit surface on the other side of the body is 166.6mm, the thickness of the body is 51 ~ 52mm, and the thickness of the leg is 2 ~ 4mm. The method according to claim 5,
The plurality of condensing lenses is composed of three, LED searchlight, characterized in that arranged in a triangle so that the center distance of each other constant. The method according to claim 5,
The LED searchlight, characterized in that the light exit surface on the other side of the body is flat. The method according to claim 5,
The LED search light, characterized in that the size of each LED light source is 8.6 ~ 9mm. The method according to claim 8,
The LED search light, characterized in that the power consumption of each LED light source is 44.77W.

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