TWI398600B - Led lamp - Google Patents

Description

Light-emitting diode lamp

The invention relates to a lighting device, in particular to a light-emitting diode lamp which can flexibly replace a light source and can effectively dissipate heat.

With the improvement of luminous efficiency, light-emitting diodes have been more and more widely used in various fields, such as residential lighting, industrial lighting and traffic lights. In these applications, a large number of light-emitting diodes are usually connected to a circuit board to form a light-emitting diode module, and then the light-emitting diode module is fixed on a casing to be assembled into one. Complete light-emitting diode lamp.

However, all of the above-mentioned light-emitting diodes are integrated on one circuit board to form an integrated light-emitting diode module. Since the light-emitting diodes and the circuit board are generally fixed by soldering, the two are extremely difficult to disassemble. If some of the light-emitting diodes in the LED module are inadvertently damaged and need to be replaced, the LED module can only be removed from the housing and replaced with a new LED. Modules result in extremely high maintenance costs for the luminaires. In addition, the replacement LED module cannot be reused due to its damaged LED, which can only be reused, and can only be disposed of. However, although the LED module is partially damaged by the LED, it still retains a large number of working LEDs. If the entire LED module is replaced, the replacement will not result in good condition. Light-emitting diodes can no longer be reused, causing great waste. In addition, since the conventional casings are made of materials such as engineering plastics, their thermal conductivity is not good, and the LEDs cannot be effectively used. The heat generated during operation is dissipated, which causes the luminous efficiency of the light-emitting diode to be affected.

In view of this, it is necessary to provide a light-emitting diode lamp that can be flexibly replaced with a light source and can effectively dissipate heat.

A light-emitting diode lamp includes a heat-conducting casing and a plurality of light-emitting diode modules, each of the light-emitting diode modules includes a circuit board and a plurality of light-emitting diodes mounted on the circuit board, and the light-emitting diodes The diode modules are fixed to the housing independently of each other to dissipate heat through the housing. Each of the LED modules further includes a heat conducting plate that is attached to the circuit board, and the LED module is borrowed. The light-emitting diode module further includes a light guide frame fixed to the heat-conducting plate, the light guide frame and the heat-conducting plate collectively sandwiching the circuit board therebetween, the light guide frame comprises a horizontal light-emitting portion that defines a light-guiding hole, two vertical side walls formed on opposite sides of the light-emitting portion, and two horizontal side wings extending outward from the side wall, and the light guide frame is fixed to the heat-conducting plate by the two side wings on.

Compared with the prior art, the LED lamp of the present invention is fixed in the housing by using independent LED modules, even if some of the LEDs of a certain LED module are damaged, only need to be separate. The damaged LED module can be replaced without replacing all of the LED modules. Therefore, the light-emitting diode lamp of the present invention can flexibly replace the light-emitting diode module in a targeted manner, thereby saving maintenance cost and effectively reducing waste. In addition, since the housing is made of a material having good thermal conductivity, it can quickly dissipate the heat generated by the light-emitting diode into the surrounding air, thereby ensuring that the light-emitting diode is positive. Often functioning.

As shown in FIG. 1-2, the LED lamp of the present invention includes a housing 10 and two LED modules 20 that are fixed in the housing 10 in parallel.

The casing 10 is made of a metal material having good thermal conductivity, such as aluminum, copper or an alloy of both, in order to dissipate heat generated by the LED module 20 fixed therein to the surrounding air. The housing 10 includes a rectangular outer cover 12, two cantilever arms 14 pivotally connected to the bottom surface of the outer cover 12, and a plurality of fins 16 formed on the bottom surface of the outer cover 12. A rectangular cavity 120 is recessed downwardly from the top of the outer cover 12, and is surrounded by a flat rectangular mounting surface 122 and an annular inner circumferential surface 124. The volume of the cavity 120 is greater than the sum of the volumes of the two LED modules 20, and a partition 126 is disposed inside to separate the two LED modules 20 from each other. A plurality of screw holes 128 are defined in the mounting surface 122 for screwing the screws 30 (as shown in FIG. 3) to lock the LED module 20 in the housing 10; the inner peripheral surface 124 is used for illuminating The diode module 20 is positioned to facilitate mounting the LED module 20 in the housing 10. The two cantilevers 14 are disposed in parallel with each other at positions opposite to opposite ends of the outer cover 12, and each cantilever 14 is substantially "U" shaped for suspending the light emitting diode lamp shown in FIG. 1 upside down. On the ceiling (not shown), the light of the LED module 20 is emitted toward the bottom of the ceiling. The fins 16 extend downward from the bottom surface of the outer cover 12 in parallel with each other for increasing the heat dissipation area of the housing 10 to dissipate heat generated by the light-emitting diode module 20 more quickly.

Referring to FIG. 3-4 together, each LED module 20 includes a heat conducting board 22, a plurality of circuit boards 24 fixed on the heat conducting board 22, and a plurality of electrical boards. The light emitting diode 26 on the circuit board 24 and a light guide frame 28 fixed to the heat conducting board 22.

The heat conducting plate 22 is also made of a metal material having good thermal conductivity, and has a configuration in which a square plate body of four corners is cut. A plurality of through holes 220 are defined in the heat conducting plate 22 for the screws 40 to be inserted to lock the circuit board 24 to the top surface thereof. The bottom surface of the heat conducting plate 22 is covered with a layer of thermal conductive adhesive 222 (FIG. 4) for bonding to the mounting surface 122 of the cavity 120 of the housing 10, thereby completing the LED module 20 and the housing 10. Thermally conductive connection.

The circuit boards 24 are secured side by side to the top surface of the heat conducting plate 22. Each of the circuit boards 24 has a rectangular strip shape, and a plurality of light emitting diodes 26 are mounted equidistantly on the top surface thereof to uniformly radiate light emitted from the light emitting diodes 26. Each of the circuit boards 24 defines a plurality of perforations (not shown) corresponding to the through holes 220 of the heat conducting plates 22 for the screws 40 to pass through to fix the circuit board 24 to the heat conducting plates 22.

The light guide frame 28 is fixed on the top surface of the heat conducting plate 22, and includes two horizontal side wings 282, two side walls 284 respectively formed vertically from the inner edges of the two side wings 282, and a horizontal light emitting portion connected between the two side walls 284. 286. The contours of the two side wings 282 are consistent with the contours of the opposite sides of the heat conducting plate 22, and each of the side wings 282 defines a through hole 281 corresponding to the through hole 220 of the heat conducting plate 22 for the screw 30 to be passed to fix the light guide frame 28 to the heat conduction. On the plate 22 and the housing 10. The height of each of the side walls 284 is greater than the sum of the thicknesses of each of the circuit boards 24 and the light-emitting diodes 26 mounted thereon to support the light-emitting portion 286 above the light-emitting diodes 26. The bottom surface of the light exiting portion 286 is recessed upwardly with three grooves 283 corresponding to the through holes 220 of the heat conducting plate 22 (see FIG. 4) for receiving the top of the screw 40 on the circuit board 24 to prevent the light guide frame 28 and the screw 40 from being interposed. occur put one's oar in. A plurality of light guiding holes 280 are uniformly formed on the top surface of the light emitting portion 286, wherein each of the light guiding holes 280 corresponds to a corresponding light emitting diode 26, so that the light emitted by each of the light emitting diodes 26 can be Guide out. Each of the light guiding holes 280 has a structure in which the diameter gradually decreases from the top to the bottom, and is surrounded by the four inclined inner wall surfaces 288 to emit the light emitted from the light emitting diode 26 at a predetermined angle, thereby lifting The overall light extraction efficiency of the LED lamp. Alternatively, for the light-emitting diode lamp of the present invention, the light-emitting diode 26 preferably emits light at an angle of 45 to 60 degrees. Therefore, each inner wall surface 288 of the light guiding hole 280 corresponds to The angle between the vertical faces can be controlled between 45 degrees and 60 degrees. In addition, in order to enable most of the light emitted by the LED 26 to be transmitted to the outside of the LED, the inner wall 288 of each of the light guiding holes 280 may be coated with a reflective material having a higher reflectivity. (not shown).

When the LED device is assembled, the circuit board 24 on which the LEDs 26 have been mounted is first disposed side by side on the top surface of the heat conducting board 22, and then the screws 40 are passed through the perforations in the central portion of the circuit board 24 and the heat conducting board 22. To make the two fixed to each other. The light guide frame 28 is disposed on the top surface of the heat conducting plate 22, so that each of the light emitting diodes 26 is exposed to the corresponding light guiding hole 280 of the light guide frame 28, and then the two screws 30 are respectively located at the light guiding position. The second through hole 281 of the opposite side of the frame 28 and the corresponding two through holes 220 of the heat conducting plate 22 are used to pre-lock the components into a light emitting diode module 20. Finally, the LED module 20 is placed on the mounting surface 122 of the cavity 120 of the housing 10 by the thermal conductive adhesive 222 on the bottom surface of the heat conducting plate 22, and then the four screws 30 are passed through the light guide frame 28 and conduct heat. The remaining through holes 220, 281 on the plate 22 are screwed into the screw holes 128 of the housing 10, thereby firmly fixing the LED module 20 Installed in the housing 10. Similarly, when assembling another LED module 20, it is only necessary to repeat the above steps.

Compared with the prior art, the two LED modules 20 of the present invention are fixed to the housing 10 independently of each other, and there is no connection relationship between them, even the LED of the LED module 20 26 damage, only need to replace the LED module 20 separately, without replacing the two LED modules 20. Therefore, the LED of the present invention can flexibly replace the LED module 20 in a targeted manner, thereby saving maintenance costs and effectively reducing waste. In addition, since the LED module 20 is fixed in the housing 10 having good thermal conductivity, the heat generated by the LED module 20 can be quickly dissipated into the surrounding air by the housing 10, thereby ensuring the normality of the LED 26 . Operation.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧shell

12‧‧‧ Cover

120‧‧‧ Cavity

122‧‧‧Installation surface

124‧‧‧ inner circumference

126‧‧ ‧ partition

128‧‧‧ screw holes

14‧‧‧Cantilever

16‧‧‧Fins

20‧‧‧Lighting diode module

22‧‧‧heat conducting plate

220‧‧‧Perforation

222‧‧‧thermal adhesive

24‧‧‧ boards

26‧‧‧Lighting diode

28‧‧‧Light guide

280‧‧‧Light guide hole

281‧‧‧Perforation

282‧‧‧Flanking

283‧‧‧ trench

284‧‧‧ side wall

286‧‧‧Lighting Department

288‧‧‧ inner wall

30, 40‧‧‧ screws

1 is a perspective assembled view of a light-emitting diode lamp of the present invention.

Figure 2 is a partial exploded view of Figure 1.

3 is an enlarged view of the light emitting diode module of FIG. 2.

Figure 4 is an inverted view of Figure 3.

10‧‧‧shell

126‧‧ ‧ partition

20‧‧‧Lighting diode module

26‧‧‧Lighting diode

28‧‧‧Light guide

30‧‧‧ screws

Claims (7)

A light-emitting diode lamp includes a casing and a plurality of light-emitting diode modules. Each of the light-emitting diode modules includes a circuit board and a plurality of light-emitting diodes mounted on the circuit board. The improvement is as follows: The housing is made of a thermally conductive material, and the LED modules are fixed to the housing independently of each other to dissipate heat through the housing. Each of the LED modules further includes a circuit board. The light-emitting diode module is fixed to the casing by the heat-conducting plate, and each of the light-emitting diode modules further includes a light guide frame fixed to the heat-conducting plate, the light guide frame and the heat-conducting plate The circuit board is sandwiched therebetween, and the light guide frame comprises a horizontal light-emitting portion for opening the light-guiding hole, two vertical side walls respectively formed on opposite sides of the light-emitting portion, and two horizontally extending from the side wall. The side wings, the light guide frame is fixed to the heat conducting plate by the two side wings. The illuminating diode lamp of claim 1, wherein the heat conducting plate is coated with a layer of thermal conductive glue, and the heat conducting plate is in contact with the casing by the layer of thermal conductive adhesive. The illuminating diode lamp of claim 1, wherein each of the light guiding holes corresponds to a light emitting diode. The illuminating diode lamp of claim 1, wherein each of the light guiding holes of the light guiding frame is surrounded by four inclined inner wall surfaces. The illuminating diode lamp of claim 4, wherein an angle between each inner wall surface of the light guiding hole and the corresponding vertical surface is between 45 degrees and 60 degrees. The illuminating diode lamp of claim 1, wherein the diameter of the light guiding hole gradually increases away from the light emitting diode. The illuminating two according to the patent application scope of any one of claims 1 to 6 The polar body lamp, wherein the casing forms a concave cavity, and the light emitting diode modules are accommodated side by side in the cavity and are separated from each other by a partition.