TWI409408B - Illuminating apparatus - Google Patents

Abstract

A illuminating apparatus includes a lampshade, a lighting module, a heat dissipation module and a lamp cap. The lampshade includes a shell and an optical lens which is installed on the shell. The shell has several holes surround the optical lens. A part of the heat dissipation module is received in the lampshade. The heat dissipation module includes several heat links and a bottom plate which is connecting to the several heat links. A capacity is formed by the several heat links. The bottom plate is placed on one side of the capacity and away from the optical lens. The lighting module is received in the capacity and faces toward the optical lens. Light from the lighting module is emitted out through the optical lens. The lamp cap is connected with the bottom plate and located away from the optical lens.

Description

Lighting device

The invention relates to a lighting device, in particular to a lighting diode lighting device.

At present, Light Emitting Diode (LED) has been widely used in many fields, especially in street lamps. Here, a novel light-emitting diode can be found in Daniel A. Steigerwald et al., IEEE Journal on Selected Topics in Quantum Electronics, Vol. 8, No. 2, March/April 2002, Illumination With Solid State Lighting Technology.

Since the working time of the street lamp is generally long, it generates more heat. When the temperature reaches a certain level, it will result in a low internal quantum effect and significantly shorten its life. In order to avoid this, a light-emitting diode is generally provided with a heat dissipating component, such as a heat dissipating fan, a heat pipe, and the like. However, in the existing lighting device, due to the relative positional relationship between the various components and the thermal conductivity of the material are generally not ideal, under the high power operation, the heat generated by the operation of the light emitting diode cannot be dissipated in time. Thereby affecting the normal operation of the entire lighting device.

Hereinafter, an illumination device having high heat dissipation efficiency and uniform light emission will be described by way of embodiments.

A lighting device includes: a lamp cover, a heat dissipation module, a lighting module and a lamp holder. The lampshade includes a housing and an optical lens disposed on the housing. The housing has a plurality of first through holes, and the plurality of first through holes are distributed around the optical lens. The heat dissipation module is partially received in the housing, and has a portion exposed to the outside of the housing. The heat dissipation module includes a plurality of heat dissipation fins and a bottom plate connected to the plurality of heat dissipation fins, and the plurality of heat dissipation fins A cavity is formed, and the bottom plate is disposed on a side of the cavity away from the optical lens, and the bottom plate has a plurality of second through holes corresponding to the first through holes. The light emitting module is received in the cavity and opposite to the optical lens, and the light emitted by the light emitting module is emitted through the optical lens. The lamp cap is connected to the bottom plate and is located away from the side of the optical lens.

Compared with the prior art, the plurality of heat dissipating fins of the illuminating device enclose the cavity and accommodate the illuminating module, so that the heat generated by the illuminating diode in the illuminating module can be quickly transmitted to the plurality of heat dissipating The fins are emitted into the air by the plurality of fins. At the same time, a plurality of first through holes on the casing form a natural convection passage with a plurality of second through holes on the bottom plate, which can effectively perform air convection, and the light emitting diodes in the light emitting module are generated. Part of the heat can be quickly transferred to the air, which effectively improves the heat dissipation efficiency of the lighting device. And the lamp cover has an optical lens opposite to the light emitting module, and the optical lens can effectively diffuse the light in the center of the light emitting module to the periphery In part, the light extraction angle of the entire lighting device is increased and the light uniformity is correspondingly increased.

200‧‧‧Lighting device

10‧‧‧shade

20‧‧‧ Thermal Module

30‧‧‧Lighting module

40‧‧‧ lamp holder

101‧‧‧shell

102‧‧‧ optical lens

103‧‧‧First through hole

203‧‧‧floor

201‧‧‧Heat fins

202‧‧‧ cavity

204‧‧‧Second through hole

301‧‧‧Substrate

302‧‧‧Light source

303‧‧‧ third through hole

1 is a perspective view of the lighting device of the present invention.

Figure 2 is an exploded view of the lighting device shown in Figure 1.

Figure 3 is a cross-sectional view of the lighting device shown in Figure 1 taken along line III-III.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , an illumination device 200 with high heat dissipation efficiency and uniform light emission is provided by an embodiment of the present invention.

Referring to FIG. 2 and FIG. 3 , the illumination device 200 includes a lamp cover 10 , a heat dissipation module 20 , a light module 30 , and a lamp holder 40 .

The lampshade 10 includes a housing 101 and an optical lens 102 disposed on the housing 101. The housing 101 of the lampshade 10 has a plurality of first through holes 103 distributed around the optical lens 102.

The heat dissipation module 20 is received in the housing 101 of the lamp cover 10 , and the heat dissipation module 20 is partially exposed to the outside of the housing 10 . The heat dissipation module 20 includes a bottom plate 203 and a plurality of heat dissipation fins 201. The plurality of heat dissipation fins 201 are enclosed to form a cavity 202. The bottom plate 203 and the plurality of heat dissipation fins 201 are enclosed by the cavity 202. Connected to one side of the cavity 202 away from the optical lens 102, the bottom plate 203 has a plurality of second through holes 204, the plurality of second through holes 204 and the plurality of first through holes 103 Corresponding.

The light emitting module 30 is received in the cavity 202 enclosed by the plurality of heat dissipation fins 20 and opposed to the optical lens 102 . In this embodiment, the light-emitting module 30 includes a substrate 301 and a light source 302 disposed on the substrate 301. The light source 302 can be a light-emitting diode chip, a light-emitting diode, or a light-emitting diode module.

The substrate 301 has a plurality of third through holes 303, and the plurality of third through holes 303 are distributed around the light source 302, and the plurality of third through holes 303 and the plurality of first through holes 103 and the plurality of The two through holes 204 correspond.

The base 40 is connected to the heat dissipation module 20 . In the embodiment, the base 40 is disposed on the bottom plate 203 of the heat dissipation module 20 . The base 40 is generally made of copper having better thermal conductivity performance.

The light emitted by the light source 302 is incident on the optical lens 102. The optical lens 102 can effectively diffuse the light in the center of the light source 302 to the peripheral portion, thereby increasing the light exit angle of the entire illumination device 200 and uniformity of light output. Will increase accordingly.

A portion of the heat generated by the light source 302 during operation is transmitted to the plurality of heat dissipation fins 201 via the substrate 301, and is directly emitted into the air by the plurality of heat dissipation fins 201. At the same time, a plurality of first through holes 103 on the lamp cover 10, a plurality of second through holes 204 on the bottom plate 203 of the heat dissipation module 20, and a plurality of third through holes 303 on the substrate 301 correspond to each other to form a natural The convection channel effectively convects the air naturally, and transmits part of the heat generated by the light source 302 during the working process to the outside to improve the heat dissipation efficiency.

Of course, the light source 302 is not limited to one, and may be plural.

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.

200‧‧‧Lighting device

10‧‧‧shade

20‧‧‧ Thermal Module

30‧‧‧Lighting module

40‧‧‧ lamp holder

101‧‧‧shell

102‧‧‧ optical lens

103‧‧‧First through hole

201‧‧‧Heat fins

202‧‧‧ cavity

203‧‧‧floor

204‧‧‧Second through hole

301‧‧‧Substrate

302‧‧‧Light source

303‧‧‧ third through hole

Claims (4)

A lighting device comprising: a lamp cover, the lamp cover comprising a housing and an optical lens disposed on the housing, the housing having a plurality of first through holes, the plurality of first through holes surrounding the optical a lens assembly; a heat dissipation module, the heat dissipation module is partially received in the housing, and has a portion exposed to the outside of the housing, the heat dissipation module includes a plurality of heat dissipation fins and a plurality of heat dissipation fins connected thereto The bottom plate, the plurality of heat dissipating fins are formed into a cavity, the bottom plate is disposed in the cavity, and is located away from one side of the optical lens, and the bottom plate has a plurality of second passes corresponding to the first through holes a light-emitting module, the light-emitting module is received in the cavity and opposite to the optical lens, the light emitted by the light-emitting module is emitted through the optical lens; and a lamp head is connected to the bottom plate, and the lamp cover is located Keep away from the side of the optical lens. The lighting device of claim 1, wherein the lighting module comprises a substrate and at least one light source. The lighting device of claim 2, wherein the light source is a light emitting diode. The illuminating device of claim 2, wherein the substrate has a plurality of third through holes corresponding to the first through holes and the second through holes, the plurality of third through holes surrounding the light source distributed.