201005218 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種照明裝置，尤其係一種發光二極體照 '明裝置。 【先前技術】 目前，發光二極體（Light Emitting Diode，LED)已被廣 泛應用到很多領域，尤其係廣泛應用於路燈。於此，一種 新型發光二極體可參見Daniel A. Steigerwald等人於文獻 IEEE Journal on Selected Topics in Quantum Electronics，Vol.8，No.2，March/April 2002 中之 Illumination With Solid State Lighting Technology —文0 由於路燈之工作時間一般較長，其產生之熱量也較 多，當溫度達到一定程度時，將會導致低落之内部量子效 應並且明顯縮短其壽命。為了避免這一狀況之發生，一般 給發光二極體提供一個散熱元件，例如散熱風扇、熱管等 φ 等。然而現有照明裝置中，由於其各個元件之間之相對位 置關係之設置及其材料之導熱性能都普遍不太理想，於高 功率操作下，發光二極體工作所產生之熱量無法及時散 去，從而影響整個照明裝置正常工作。 【發明内容】 下面將以實施例說明一種具較高散熱效率且出光均勻 之照明裝置。 一種照明裝置，其包括：一個燈罩，一個散熱模組， 一個發光模組以及一個燈頭。該燈罩包括一個殼體一個設 6 201005218 置於該殼體上之光學透鏡，該殼體上具有複數個第一通 孔，該複數個第一通孔圍繞該光學透鏡分佈。該散熱模組 部分收容於該殼體内，其具有部分暴露於該殼體外，該散 熱模組包括複數個散熱鰭片以及一個與該複數個散熱鰭片 相連接之底板，該複數個散熱鰭片圍合成一個腔體，該底 板設置於該腔體之遠離該光學透鏡之一側，該底板上具有 複數個與該第一通孔相對應之第二通孔。該發光模組收容 A於該腔體内並與該光學透鏡相對，該發光模組發出之之光 經由該光學透鏡射出。該燈頭與該底板相連接，且位該燈 罩之遠離該光學透鏡一側。 相對於先前技術，該照明裝置之複數個散熱鰭片圍合 之腔體並收容該發光模組，因此，該發光模組中之發光二 極體產生之熱量能快速之傳送至該複數個散熱鰭片，並藉 由該複數個散熱鰭片散發至空氣中。同時，該殼體上之複 數個第一通孔與該底板上之複數個第二通孔形成自然對流 ❹通道，能有效之進行空氣對流，將該發光模組中之發光二 極體產生之部分熱量能快速之傳送至空氣中，有效提升了 該照明裝置之散熱效率。並且該燈罩具有一個與該發光模 組相對之光學透鏡，該光學透鏡能有效之將發光模組之中 央之光有效地擴散到周邊部分，從而可使得整個照明裝置 之出光角度增加且出光均勻度也會相應地提升。 【實施方式】 下面將結合附圖對本發明實施方式作進一步之詳細說 201005218 請參見圖1、，本發明實施方式提供之一種具較高散熱 效率且出光均勻之照明裝置200。 請參見圖2與圖3，該照明裝置200包括：一個燈罩 10，一個散熱模組20，一個發光模組30以及一個燈頭40 該燈罩10包括一個殼體101以及一個設置於該殼艘 101上之光學透鏡102。該燈罩1〇之殼體101上具有複數 個第一通孔103,該複數個第一通孔1〇3圍繞該光學透鏡 赢102分佈。 該散熱模組20收容於該燈罩10之殼體101内’且該 散熱模組20具有部分暴露於該殼體10外。該散熱模組20 包括一個底板203與複數個散熱鰭片201，該複數個散熱鑛 片201圍合形成一個腔體202,該底板203與該複數個散熱 鰭片201圍合形成之腔體202相連接，且設置於該腔體202 之遠離該光學透鏡102之一側，該底板203上具有複數個 第二通孔204,該複數個第二通孔204與該複數個第一通孔 • 103相對應。 該發光模組30收容於該複數個散熱鰭片20圍合之腔 體202内且與該光學透鏡102相對。於本實施例中，該發 光模組30包括一個基板301與一個設置於該基板301上之 光源302，該光源302可為發光二極體晶片、發光二極體或 發光二極體模組。 該基板301上具有複數個第三通孔303,該複數個第三 通孔303圍繞該光源302分佈，且該複數個第三通孔303 與該複數個第一通孔103以及該複數個第二通孔204相對 201005218 應。 該燈頭40與該散熱模組20相連接，於本實施例中， 該燈頭40設置於該散熱模組20之底板203上。該燈頭40 一般由導熱效率性能較好之銅製成。 該光源302發出之光線入射至該光學透鏡102,該光學 透鏡102能有效之將光源302之中央之光有效地擴散到周 邊部分，從而可使得整個照明裝置200之出光角度增加且 A 出光均勻度也會相應地提升。 該光源302工作時產生之部分熱量經該基板301傳送 到該複數個散熱鰭片201，並由該複數個散熱鰭片201直接 散發到空氣中。同時，該燈罩10上之複數個第一通孔103， 該散熱模組20之底板203上之複數個第二通孔204，該基 板301上之複數個第三通孔303相互對應，形成自然對流 通道，有效地使空氣自然對流，將該光源302於工作過程 中產生之部分熱量傳送至外界，以提升散熱效率。 φ 當然，該光源302不限於一個，也可為複數個。 綜上所述，本發明確已符合發明專利之要件，遂依法 提出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，自不能以此限制本案之申請專利範圍。舉凡熟悉本案 技藝之人士援依本發明之精神所作之等效修飾或變化，皆 應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1係本發明該照明裝置之立體示意圖。 圖2係圖1中所示照明裝置之分解圖。 201005218 圖3係圖1中所示照明裝置之沿III-III線之剖視圖。 【主要元件符號說明】201005218 IX. Description of the Invention: [Technical Field] The present invention relates to a lighting device, and more particularly to a lighting diode device. [Prior Art] 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. 0 Since the working hours of street lamps are generally long, they generate more heat. When the temperature reaches a certain level, it will lead to low internal quantum effects and significantly shorten the life. In order to avoid this situation, a heat dissipating component such as a heat dissipating fan, a heat pipe, etc., is generally provided to the light emitting diode. 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. SUMMARY OF THE INVENTION Hereinafter, an illumination device having a 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 cap. 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 The substrate is formed by a cavity, 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 housed 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 base 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, the plurality of first through holes on the casing form a natural convection channel with the 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 light 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 peripheral portion, thereby increasing the light-emitting angle of the entire illumination device and uniformity of light emission. It will also increase accordingly. Embodiments of the present invention will be further described in detail with reference to the accompanying drawings. 201005218 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 lighting device 200 includes: a lamp cover 10 , a heat dissipation module 20 , a light module 30 and a lamp head 40 . The lamp cover 10 includes a casing 101 and a casing 101 . Optical lens 102. The housing 101 of the lamp housing 1 has a plurality of first through holes 103, and the plurality of first through holes 1〇3 are distributed around the optical lens. The heat dissipation module 20 is received in the casing 101 of the lampshade 10 and the heat dissipation module 20 is partially exposed to the outside of the casing 10. The heat dissipation module 20 includes a bottom plate 203 and a plurality of heat dissipation fins 201. The plurality of heat dissipation core pieces 201 are enclosed to form a cavity 202. The bottom plate 203 is surrounded by the plurality of heat dissipation fins 201 to form a 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, and the plurality of second through holes 204 and the plurality of first through holes 103 corresponds. 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-pass hole 204 corresponds to 201005218. 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, and 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 the uniformity of the A light output. It will also 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. φ 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 present invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 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. 201005218 FIG. 3 is a cross-sectional view taken along line III-III of the lighting device shown in FIG. 1. [Main component symbol description]
照明裝置 200 燈罩 10 散熱模組 20 發光模組 30 燈頭 40 殼體 101 光學透鏡 102 第一通孔 103 底板 203 散熱鰭片 201 腔體 202 第二通孔 204 基板 301 光源 302 第三通孔 303Lighting device 200 Lampshade 10 Thermal module 20 Illumination module 30 Lamp cap 40 Housing 101 Optical lens 102 First through hole 103 Base plate 203 Heat sink fin 201 Cavity 202 Second through hole 204 Substrate 301 Light source 302 Third through hole 303