KR20090042756A - LED lighting - Google Patents

Abstract

A light emitting diode illuminating equipment (1) comprises a heat-dissipating plate member (11); a plurality of heat-dissipating fins (17) extending from the heat-dissipating plate member (11); a plurality of heat-conducting members (12) connecting to the heat-dissipating plate member (11); a plurality of diode light-emitting apparatus (13) connecting to the corresponding heat-conducting member (12); a plurality of optical devices (14), each of which corresponds to one of diode light-emitting apparatus (13) and adjusts the shape of light field of each diode light-emitting apparatus (13); a barrel (15) including a first circumference and a second circumference, the first circumference is joined to the heat-dissipating plate member (11) and formed an inner space for receiving the heat-conducting members (12) and diode light-emitting apparatus (13); and a transparent shield (16) jointed to the second circumference of the barrel (15).

Description

LED lighting device

The present invention relates to a light emitting diode (LED) lighting apparatus, and more particularly, to an LED lighting apparatus having a secondary optical device capable of generating a specific light pattern.

LEDs have advantages in power saving, vibration resistance, high speed response, productivity, and the like, and thus, lighting apparatuses having LED light sources have been widely researched and developed. 1A and 1B, FIG. 1A is a front view of a lighting device having a plurality of LEDs arranged in an array, and FIG. 1B is a sectional view taken along the line X-X of FIG. 1A. As shown in Figs. 1A and 1B, the lighting apparatus obtains high brightness by arranging a plurality of LEDs in an array. In addition, each of the LEDs is arranged in correspondence with a cup for reflecting and condensing light emitted by the corresponding LED, whereby high brightness is obtained. However, this method only condenses the light isotropically, and cannot generate a specific light pattern to satisfy a specific purpose. Therefore, the lighting is limited.

Therefore, there is a need to provide a new LED lighting device that can provide a specific light pattern to solve the above-mentioned problem.

[Summary of invention]

The scope of the present invention is to provide an LED lighting device.

Another scope of the present invention is to provide an LED lighting device having a secondary optical device that can generate a specific light pattern.

According to a preferred embodiment, the LED lighting device of the present invention includes a heat sink element, N heat conduction elements, N diode light emitting elements, N optical elements, a hollow barrel, and a transparent shield, where N is a natural number. . The heat sink element has a first surface and a second surface opposite to the first surface. The plurality of heat sink fins extend from the second surface of the heat sink element. Each of the thermally conductive elements has a first portion and a second portion having a flat end extending from the first portion. Each of the diode light emitting elements corresponds to one of the N thermal conducting elements. Each of the diode light emitting elements is disposed at the flat end of the corresponding heat conducting element and converts electrical energy into light. Each of the optical elements changes the light pattern of the corresponding diode light emitting element corresponding to one of the diode light emitting elements. The hollow barrel has a first peripheral portion and a second peripheral portion. The hollow barrel is combined with the heat sink element through the first peripheral portion to form a space for accommodating the heat conduction elements and the diode light emitting elements, and to expose the heat radiation fins to the air. The transparent seal is joined with the second peripheral portion of the hollow barrel.

According to a preferred embodiment, the LED lighting device further comprises a partition plate element arranged in the hollow barrel to separate the space into the first chamber and the second chamber. The partition plate element has N holes. Each of the diode light emitting elements corresponds to one of the holes.

Here, each of the optical elements includes a support and a lens. The support is detachably coupled with the partition plate element. The support includes a first opening and a second opening. The first opening includes a plurality of hooks for engaging the support with the partition plate element, and the second opening accommodates the lens. The lens may be an elliptical lens, a circular lens, a Cat's-eye type lens, a regular lens, a polygonal lens, or another type of lens (or lenses). According to a preferred embodiment, the lens is a cat's eye type lens. The lens has a face. Grooves are formed along the elliptic mirror axis of the lens so that the light emitted through the lens forms an optical pattern that satisfies the specific requirements.

Therefore, the light emitted by each of the diode light emitting elements is changed by the corresponding lens to generate an anisotropic light pattern that satisfies specific requirements such as road lighting. In practical application, the LED device of the present invention can generate different light patterns by adjusting or designing the lens to meet different requirements.

Advantages and spirit of the present invention can be understood by the following description in conjunction with the accompanying drawings.

1A is a front view of a lighting device having a plurality of LEDs arranged in an array.

FIG. 1B is a cross-sectional view taken along the line X-X of FIG. 1A.

2 is a perspective view of the LED lighting apparatus according to a preferred embodiment of the present invention.

3A is a cross-sectional view taken along the line Y-Y of FIG.

3B is a partial cross-sectional view taken along the line Z-Z of FIG. 2.

4A is a front view of the optical element according to the preferred embodiment.

4B is a cross-sectional view taken along the line W-W in FIG. 4A.

5 is a schematic view of an optical pattern formed in accordance with the preferred embodiment.

6 is a cross-sectional view of the LED lighting apparatus according to an embodiment.

7 is a cross-sectional view of an LED lighting apparatus according to another embodiment.

2, 3A and 3B, FIG. 2 is a perspective view of an LED lighting apparatus according to a preferred embodiment according to the present invention. 3A is a cross-sectional view taken along the line Y-Y of FIG. 3B is a partial cross-sectional view taken along the line Z-Z of FIG. 2.

According to a preferred embodiment, the LED lighting device 1 comprises a heat sink element 11, six first heat conducting elements 12, six diode light emitting elements 13, six optical elements 14, a hollow barrel ( 15), and transparent shield 16. The heat sink element 11 has a first surface 112 and a second surface 114 opposite to the first surface 112. The plurality of heat sink fins 17 extend from the second surface 114 of the heat sink element 11. Each of the first thermally conductive elements 12 has a first portion 122 and a second portion 124 extending from the first portion 122 and having a flat end (not shown).

Note that each of the diode light emitting elements 13 is disposed in correspondence with one of the first thermal conducting elements 12, and each of the diode light emitting elements 13 is disposed in the corresponding first thermal conducting element 12. It is placed flat on the flat end and converts electrical energy into light. Therefore, in operation, heat generated by each of the diode light emitting elements 13 is transferred from the flat end of the corresponding first heat conducting element 12 to the heat sink element through the second portion 124 and the first portion 122. 11) and then transmitted to the heat dissipation fins 17, and then dissipated by the heat dissipation element 11 and the heat dissipation fins 17.

The heat sink element 11 of the LED lighting device 1 includes six first grooves (not shown) formed in the first surface 112 of the heat sink element 11. Each of the first grooves corresponds to one of the first thermally conductive elements 12. Each of the first grooves is configured to be in close contact with the side surface of the first portion 122 of the corresponding first heat conducting element 12 to promote heat dissipation efficiency. In addition, a gap between the first portion 122 of each of the first thermally conductive elements 12 and the corresponding first groove is filled with a thermally conductive material to further enhance heat dissipation efficiency.

In addition, the LED lighting apparatus 1 includes two second heat conductive elements fixed in close contact with the first surface 112 of the heat sink element 11 so as to enhance the heat radiation effect of both the heat sink element 11 and the heat sink fins 17. (18). As shown in the preferred embodiment, the second thermally conductive elements 18 and the first thermally conductive elements 12 are alternately arranged with each other to obtain better heat dissipation efficiency. In addition, the heat sink element 11 includes two second grooves (not shown) formed in the first surface 112 of the heat sink element 11. Each of the second grooves corresponds to one of the second thermally conductive elements 18. Each of the second grooves is configured to be in close contact with the side surface of the corresponding second heat conductive element 18 to promote heat dissipation efficiency. Between each of the second thermally conductive elements 18 and the corresponding second groove is filled with a thermally conductive material to further enhance heat dissipation efficiency. In addition, the number and arrangement of the second thermal conductive elements 18 are not limited as described above, but depend on the overall structure and the operating environment of the product. Basically, the heat sink element 11 obtains good heat dissipation efficiency by the above-described alternate arrangement.

According to a preferred embodiment of the present invention, each of the optical elements 14 changes the light pattern of the corresponding diode light emitting element 13 corresponding to one of the diode light emitting elements 13. The hollow barrel 15 forms a space S for accommodating the first heat conducting elements 12 and the diode light emitting elements 13, and a peripheral portion thereof to expose the heat dissipation fins 17 to air. It is coupled with the heat sink element 11 through (Circumference). The transparent shield 16 is engaged with the hollow barrel 15 through the other periphery of the hollow barrel 15 to seal the space S. Sealing the space S is not essential to the invention. In addition, the hollow barrel 15 reduces or cuts off the heat transferred from the heat sink element 11 and makes the LED lighting device 1 with a cold top and a cold bottom, which is more advantageous for heat dissipation efficiency. And, it is coupled with the heat sink element 11 through the heat insulating ring (19).

According to a preferred embodiment, the LED lighting device 1 further comprises a partition plate element 20 arranged in the hollow barrel 15 to separate the space S into the first chamber S1 and the second chamber S2. Include. The partition plate element 20 includes six first holes 202. Each of the diode light emitting elements 13 corresponds to one of the first holes 202. According to a preferred embodiment, each of the diode light emitting elements 13 traverses a corresponding first hole 202 and is arranged in a second chamber S2 (or corresponding first hole 202). The partition plate element 20 may secondarily fix the diode light emitting elements 13 or the first heat conductive elements 12. However, in practical application, the position of the diode light emitting elements 13 with respect to the partition plate element 20 is not limited as above.

4A and 4B, FIG. 4A is a front view of an optical element 14 according to a preferred embodiment. 4B is a cross-sectional view taken along the line W-W in FIG. 4A. According to a preferred embodiment, each of the optical elements 14 includes a support 142 and a lens 144. The support 142 is detachably coupled with the corresponding diode light emitting element 13. The support 142 includes a first opening 1422 and a second opening 1424. The first opening 1422 is coupled with the corresponding diode light emitting element 13. The second opening 1424 receives the lens 144. The lens 144 may be an elliptical lens, a circular lens, a Cat's-eye type lens, an ordinary lens, a polygonal lens, or another type of lens (or lenses). According to a preferred embodiment, the lens 144 is a cat's eye type lens. The lens 144 has a surface 1442 having a predetermined direction D defined therein. A groove 1444 is formed in the surface 1422 of the lens 144 along the direction D such that the light emitted through the lens 144 forms a light pattern that satisfies a specific request. According to a preferred embodiment, the direction D is the elliptic mirror axis of the lens 144.

5, FIG. 5 is a schematic diagram of a light pattern formed according to a preferred embodiment. The light pattern formed is symmetrical and shows that the LED lighting device 1 can change the conventional light pattern into a pattern extending laterally applied to the road lighting. In practical application, the LED lighting device 1 of the present invention can generate light patterns for different needs by constructing different lenses. In addition, the material of the lens is not limited to a single material, and a composite lens can also be used in the present invention. For example, the refractive index of the lens may be continuously changed so that the luminance in the light pattern is uniform, or the refractive index of the center portion of the lens may be lower than the peripheral portion. Also in the field of LED packaging there are packages that package the LEDs with protrusions to form simple positive lenses with the package material, or positive lenses that are covered over the LEDs after packaging for condensing. However, they cannot form other light patterns on demand. In contrast, the LED lighting apparatus of the present invention can use the LEDs produced by the two package processes described above together with the optical elements 14 to form the desired light pattern.

Referring to FIG. 6, FIG. 6 is a cross-sectional view of the LED lighting apparatus 1 ′ according to an embodiment. In comparison with the preferred embodiment, the partition plate element 20 'of the LED lighting device 1' has a plurality of holes 204 formed near each of the first holes 202, and the optical elements 14 The first opening of each support 142 'of') includes a plurality of hooks 1426. The hooks 1426 are inserted into the holes 204 such that the support 142 'is engaged with the partition plate element 20'.

Referring to Figure 7, Figure 7 is a cross-sectional view of an LED lighting device 1 "according to another embodiment. In comparison with the preferred embodiment, each of the optical elements 14" of the LED lighting device 1 "is The first opening of the support 142 "includes a plurality of hooks 1426 '. The hooks 1426 'are inserted into the corresponding first holes 202' such that the support 142 "is engaged with the partition plate element 20". It should be noted here that the coupling of the partition plate element and the support of the LED lighting apparatus of the present invention may be designed such that the holes are formed in the support while the hooks are formed in the partition plate element, thereby providing the purpose of the detachable coupling. Can be achieved. In addition, the coupling may be accomplished by screwing together by screws.

According to a preferred embodiment, the LED lighting device 1 has a heat insulating plate element 21 arranged in the first chamber S1 to separate the first chamber S1 into the third chamber S12 and the fourth chamber S14. It further includes. The heat insulation board element 21 has six second holes 212. Each second portion 124 of the first thermally conductive elements 12 corresponds to one of the second holes 212 and passes through the corresponding second hole 212. Therefore, heat transmitted to the heat sink element 11 is not radiated or conducted back to the fourth chamber S14 due to the insulating action of the heat sink element 21, so that the thermal shock to the diode light emitting elements 13 is reduced. Is prevented. In addition, an insulating material is filled in the gaps between the first thermally conductive elements 12 and the second holes 212, thereby enhancing an insulation effect. In addition, the LED lighting device 1 has a heat insulating sleeve arranged to cover the second part 124 of one of the first heat conducting elements 12, in particular the second part 124 in the fourth chamber S14. 22) is further included. Therefore, in operation, heat generated by the diode light emitting elements 13 with respect to the first heat conducting element 12 is not dissipated to the fourth chamber S14, so that the heat generating efficiency of the heat sink element 11 is further improved. do. Here, it should be noted that when the separator element 20 has a heat insulating ability, the heat insulating plate element 21 may be omitted for the sake of design simplification. This structure can also be applied to the embodiments shown in FIGS. 6 and 7.

Note also that the above description is based on using the same type of lens. However, each of the diode light emitting devices may be configured to correspond to different lenses to obtain various light patterns. In addition, in the above-described embodiments, the first heat conducting elements 12 and the second heat conducting elements 18 may be heat pipes, heat columns, vapor chambers, or other heat conducting devices. . The first thermally conductive elements 12 and the second thermally conductive elements 18 are made of copper, aluminum or other material having a high heat transfer coefficient. One of the diode light emitting elements 13 includes at least one LED or laser diode (LD), and LEDs having different colors may be used.

In summary, the LED lighting device of the present invention includes a secondary optical design. The light pattern generated by the diode light emitting elements is changed by the optical elements to satisfy different requirements. In addition, the LED lighting device can generate various light patterns by adjusting and designing the optical elements to meet more diverse requirements. It should be noted here that although the above description is based on the case of road ramps, the present invention is not limited thereto. The present invention applies to any need for illumination, in particular to the need for specific light patterns.

The features and spirits of the invention will be well understood with the examples and descriptions set forth above. Those skilled in the art will readily appreciate that various modifications and variations can be made while maintaining the principles of the invention. Accordingly, the foregoing description should be construed as limited only by the limitations and scope of the appended claims.

Claims (21)

A heat sink element having a first surface and a second surface opposite to the first surface; A plurality of heat sink fins extending from the second surface of the heat sink element; N first thermal conductive elements each of which is a natural number including a first portion fixed to the first surface of the heat sink element and a second portion extending from the first portion and having a flat end portion; N diode light emitting elements each disposed at the flat end of one of the first thermal conducting elements and converts electrical energy into light; N optical elements for changing the light pattern of the corresponding diode light emitting element corresponding to one of the diode light emitting element, respectively; A heat dissipation element comprising a first periphery and a second periphery, forming a space for accommodating the first heat conductive elements and the diode light emitting elements, and exposing the heat dissipation fins to air; A hollow barrel coupled with; And LED lighting device comprising a transparent shield coupled to the second peripheral portion of the hollow barrel. The LED lighting device of claim 1, wherein each of the optical elements includes a support and a lens, and the support is detachably coupled with a corresponding diode light emitting element. The LED lighting apparatus of claim 2, wherein the support includes a first opening and a second opening, the first opening being coupled with a corresponding diode light emitting element, and the second opening receiving the lens. The LED lighting apparatus of claim 3, wherein the lens comprises one selected from the group consisting of an elliptical lens, a circular lens, a cat's-eye lens, a regular lens, and a polygonal lens. The LED lighting apparatus of claim 4, wherein the N optical elements include a first optical element and a second optical element, and the lens of the first optical element is the same as the lens of the second optical element. The LED lighting device of claim 4, wherein the N optical elements comprise a first optical element and a second optical element, and the lens of the first optical element is different from the lens of the second optical element. The apparatus of claim 1, further comprising: a partition plate element disposed in the hollow barrel and having N first holes to separate the space into a first chamber and a second chamber, Each of the diode light emitting devices corresponds to one of the first holes. The LED lighting apparatus of claim 7, wherein each of the optical elements includes a support and a lens, and the support is detachably coupled to the partition plate element. 9. The apparatus of claim 8, wherein the support includes a first opening and a second opening, the first opening including a plurality of hooks for coupling the support to the partition plate element, wherein the second opening is the lens. LED lighting device to accommodate. The LED lighting apparatus of claim 8, wherein the lens comprises one selected from the group consisting of an elliptical lens, a circular lens, a cat's-eye lens, a regular lens, and a polygonal lens. The LED lighting apparatus of claim 10, wherein the cat's eye lens has a surface in which a predetermined direction is defined, and a groove is formed in the surface along the direction. 12. The LED lighting device of claim 11, wherein the direction is an elliptic mirror axis of the lens. The LED lighting apparatus of claim 7, wherein the partition plate element has a heat insulating ability. 8. The apparatus of claim 7, further comprising a heat insulation plate element disposed in the first chamber and including N second holes, wherein the second portion of each of the first heat conductive elements corresponds to one of the second holes. LED lighting device passing through the corresponding second hole. 15. The LED lighting device of claim 14, further comprising an insulating sleeve disposed to cover the second portion of one of the first thermal conducting elements. The heat sink of claim 1, wherein the heat sink element comprises N first grooves formed in the first surface of the heat sink element, wherein each of the first portions of the first heat conductive elements corresponds to one of the first grooves. Fixed LED lighting system. The LED lighting apparatus of claim 16, wherein a thermal conductive material is filled between the first portion of each of the first thermal conductive elements and a corresponding first groove. The LED lighting apparatus of claim 1, further comprising a plurality of second thermal conductive elements fixed to the first surface of the heat sink element. 19. The LED of claim 18, wherein the heat sink element comprises a plurality of second grooves formed on the first surface of the heat sink element, each of the second heat conductive elements being fixed to one of the second grooves. Lighting equipment. 20. The LED lighting apparatus of claim 19, wherein a thermal conductive material is filled between each of the second thermal conductive elements and a corresponding second groove. The LED lighting device of claim 1, further comprising a heat insulation ring, wherein the hollow barrel is coupled to the heat sink element through the heat insulation ring.

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