201205001 六、發明說明： 【發明所屬之技術領域】 本發明係與照明裝置有關，特別是關於一種可產生上 下不對稱之光型的照明裝置。 【先前技術】 習知汽車所使用的燈具大多是以白熾燈、_素燈及高強 度氣體放電燈（High Intensity Discharge ;簡稱HID)為主要 φ 發光源，但隨著環保節能的議題日益受到重視，由於發光二 極體（Light-Emitting Diode ;簡稱LED)具有體積小、耗電量 低、反應時間快及使用壽命長等優點，因此目前各國汽車廠 已逐漸有將LED作為汽車燈具發光源的趨勢。led應用於汽 車照明燈具，可作為車内儀表板顯示用，或車外之煞車 燈、方向燈、倒車燈、第三煞車燈、後方霧燈等，然而使 用LED的前霧燈則較少見。 目前車燈設計的兩大主流為多橢圓反射鏡形式（p〇ly_ • Ellipsoid System )(又稱為投射式車燈，Pr〇jecti〇n System) ’以及多重反射鏡形式（Multi-Reflector，MR)。如 我國專利公告號1296585所揭露之「前霧燈/a fog lamp」 即為一種以LED作為發光源之投射式車燈，為配合led之 獨特幅射光型，該前霧燈使用一投射透鏡，組合一反射 鏡，再配合一遮光片以阻擋部分光線，使該前霧燈得以產 生上下不對稱之光型，以調整出符合歐洲經濟委員會 (Economic Commission for Europe，ECE)對車輛燈光設備所 201205001 制定之前霧燈規範（ECER19)之光型（如第一圖所示）。 第一圖所示為ECE R19規範之前霧燈光型，係以該前 霧燈之發光輪為中心點’朝左、右形成平行轴h，朝上、下 形成垂直軸v。該光型主要具有五區域：a區係位於發光軸 下方朝左、右各延伸一距離，係為亮度最高之區域；B區係 自A區朝左、右再分別向外延伸，亮度低於a區；c區係 位於發光軸上方朝左、右各延伸約為A區一半之距離，亮 度低於B區，D區係自A區朝上、下、左、右再分別向外 延伸’亮度低於C區；E區係自D區再朝上延伸，亮度低 於D區。 前述公告專利之前霧燈雖可達到ECE R19規範之光 型’然而，係利用光學透鏡調焦方式達到所需輻射光場之 投射光型’故其中該投射透鏡之擺放位置需相當精準；而 且，該遮光片會造成光線的利用率降低，因此若要使該前 霧燈發出足夠亮度之光線，則需在光源位置設置多數個 LED ’如此不但反而造成能源浪費，更會有散熱不易之缺201205001 VI. Description of the Invention: [Technical Field] The present invention relates to a lighting device, and more particularly to a lighting device capable of generating an upper and lower asymmetrical light type. [Prior Art] Most of the lamps used in the conventional car are incandescent lamps, _ s lamps and High Intensity Discharge (HID) as the main φ source, but they are increasingly valued with the issue of environmental protection and energy conservation. Because Light-Emitting Diode (LED) has the advantages of small size, low power consumption, fast response time and long service life, automotive manufacturers in various countries have gradually adopted LED as the light source of automobile lamps. trend. Led is used in automotive lighting fixtures, and can be used as an in-vehicle dashboard display, or as a vehicle exterior light, direction light, reverse light, third light, rear fog light, etc. However, front fog lamps using LEDs are less common. At present, the two mainstreams of the design of the lamp are multi-elliptical mirrors (p〇ly_ • Ellipsoid System) (also known as the projectile lamp, Pr〇jecti〇n System) and the multi-reflector form (Multi-Reflector, MR ). For example, the "front fog lamp / a fog lamp" disclosed in the Chinese Patent Publication No. 1,296,585 is a projection type lamp with an LED as a light source. To match the unique radiation type of LED, the front fog lamp uses a projection lens. Combining a mirror with a light shield to block part of the light, so that the front fog lamp can generate an up and down asymmetrical light pattern to adjust to meet the requirements of the Economic Commission for Europe (ECE) for vehicle lighting equipment. 201205001 Developed the light type of the previous fog lamp specification (ECER19) (as shown in the first figure). The first figure shows the fog light type before the ECE R19 specification. The center of the front fog lamp is used as the center point. The parallel axis h is formed to the left and right, and the vertical axis v is formed upward and downward. The light type mainly has five regions: the a region is located below the light axis and extends to the left and right by a distance, which is the region with the highest brightness; the B region extends outward from the A region to the left and right, respectively, and the brightness is lower than Area a; Section c is located above the illuminating axis, extending to the left and right, about half the distance of the A area, the brightness is lower than the B area, and the D area is extending outward from the A area upwards, downwards, left and right respectively. The brightness is lower than the C area; the E area extends from the D area to the upper side, and the brightness is lower than the D area. Before the aforementioned patents, the fog lamps can achieve the light type of the ECE R19 specification. However, the optical lens focusing mode is used to achieve the projected light pattern of the desired radiation field. Therefore, the projection position of the projection lens needs to be quite accurate; The visor will reduce the utilization of light. Therefore, if the front fog lamp emits light of sufficient brightness, it is necessary to set a plurality of LEDs at the position of the light source, so that not only does the energy waste, but also the heat dissipation is not easy.
又，如美國專利公告號US6945672B2所揭露之「LED planar light source and profile headlight constructed therewith」則 為一種以LED構成平面光源之反射式車燈，係將led平面 光源放置於一拋物面反射罩之焦點上，以產生平行投射發光之 輻射光場。然而，該反射式車燈的反射罩尺寸必須很大，才能 將朝向四周等向發光的LED光源有效匯聚而投射出足夠之光 線強度，因此仍有待改進。 201205001 【發明内容】 有！於上述缺失，本發明之主要目的在於提供一種照 =裝置’不但可產生上下不對稱之光型以符合ece㈣規 範，更具有省電及光線利用率佳之優點。 為達成上述目的，本發明所提供之照明裝置包含有一 反射罩及—發光元件。該反射罩之内面具有曲率不同之一 上曲面、一下曲面，以及連接於該上、下曲面之間的二側 平面，而該發光元件係設置於該反射罩之上曲面焦點及下 曲面焦點之間。藉此，該發光元件產生之光線透過該反射 罩之上、下曲面反射後，會向外投射出光線，且由於該 上、下曲面曲率設計之差異，該照明裝置投射出之光線會 隨其尚度不同而具有不同之亮度，因此可調整出符合特定 規範之車輛照明設備光型，且由於該特定光型效果並非藉 由阻擋該發光元件產生之部分光線而達成，因此該照明裝 置具有良好之光線利用率。再者，該照明裝置可更設有一 上下不同曲率之透鏡，係用以增加該反射罩反射後之光線 的集光效率，以更加提升該照明裝置之光線利用率。 有關本發明所提供之照明裝置的詳細構造、特點、組 裝或使用方式，將於後續的實施方式詳細說明中予以描 述。然而，在本發明領域中具有通常知識者應能瞭解，該 等詳細說明以及實施本發明所列舉的特定實施例，僅係用 於說明本發明，並非用以限制本發明之專利申請範圍。 201205001 .貝々07 ：i\ j 以下將藉由所列舉之實施例配合隨附之圖式，詳細= 明本發明之技術内容及特徵，其中： ㈤說 第二圖為本發明一第一較佳實施例所提供之照明 的立體示意圖； 、 置 第三圖為本發明該第一較佳實施例所提供之照明擎 的側視示意圖； 、'1 第四圖為本發明該第一較佳實施例所提供之照明 的頂視示意圖； ' ί 第五圖為本發明該第一較佳實施例所提供 ％裝詈 的光型示意圖； 第六圖為本發明一第二較佳實施例所提供之照明 的頂視示意圖；以及 、 '"置 第七圖為本發明一第二較佳實施例所提供之照明聿 的侧視示意圖。 ' 結 申請人首先在此說明，在以下將要介紹之實施 圖式中，相同之參考號碼，表示相同或類似之元 及 構特徵。 3 、 第一較佳實施例 以及一發光元件 請先參閱第二圖至第四圖’本發明一 所提供之照明裝置10包含有一反射罩20， 30。 該反射罩20係呈一開放之殼體狀，其内面具有相互連 接之一上曲面22、一下曲面24,以及連接於該上、下曲面 22、24間之二側平面26。其中，該上、下曲面22、24之 201205001 連接處係形成該反射罩20之一連接部27，而相對於該連接 部27係為該反射罩20之一開口 28。該上曲面22之曲率半 徑係較該下曲面24之曲率半徑為小，因此，該上曲面22 之焦點222係較該下曲面24之焦點242更為接近該連接部 27，且該二焦點222、242之連線定義出該照明裝置1〇之 一發光軸線40。各該側平面26係自該連接部27朝該開口 28方向向外傾斜，使得該反射罩2〇垂直其發光軸線4〇之 截面寬度係自該連接部27朝該開口 28方向逐漸增寬；本 • 實施例所提供該二側平面26具有以該發光元件為中心且朝 該開口 28呈相互對稱之向外傾斜角度，較佳之角度以小於 10度且大於5度者(其中以8度為最佳)可於應用至車輛裝 置時有符合特定照明規範的照視角度。 該發光元件30為-發光二極體，係設置於該反射罩2〇 之上曲面焦點222及下曲面焦點224之間，使得該發光元 件30產生之光線透過該反射罩2〇之上、下曲面22、％及 二側平面26反射後’會朝向該開σ 28投射出以該發光軸 線40為中心向周圍發散之光線’其發散方向對應於該發光 軸線40之左、右兩侧為呈對稱之亮度分佈，對應於該發光 軸線40之上、下兩侧為呈非對稱之亮度分佈且較趨於下側 有較大之凴度分佈，以符合車輛照明設備特定規範之光 型。 前述本實施綱提供之照明裝置1()，可用以設置於汽 車之車頭前端’以作為該汽車之前霧燈。由於該上、下曲 面22、24曲率設計之差異，該照明裝置1〇投射出之光線 201205001 會隨其投射高度不同而具有不同之亮度， 又且由於該二側平 面26係向外傾斜’可使光線朝向左、右兩顺射之角 大；因此，該照明裝置10所投射出之光線可於其開口^ 前方一與該發光軸線4〇相互垂直之投影承 、 $旦心仅〜十面42產生如第 五圖所示之光型，其位於該發光軸線4〇 L 、下兩側為呈 非對稱之亮度分佈。詳而言之，舰明t置1()於該投影平 面42上之亮度分佈係自一垂直長度較小而水平長^較Z之 令央區域422朝上、下、左、右亮度漸減，且產生之光型 係符合如ECE R19所規範者。另外’由於該特定光型效果 並非藉由阻檔該發Μ件30產生之部分光線而達成，因此 該照明裝置1G具有良好之光線率。再者，由於該發光 元件30係為發光二極體，因此更可使該照明裝置具有 節能省電之優點。 ~ 請再參閱第六圖，本發明一第二較佳實施例所提供之 …、月裝置50係結合二組第一較佳實施例中之反射罩2〇及 發光元件30。詳而言之，各該反射罩2〇係以其一側平面 26鄰接於另一反射罩2〇之一側平面26，且該等反射罩 之開口 28係朝向同一方向並位於同一開口平面6〇上另 外，該等反射罩20之上、下曲面焦點連線係相互平行且位 於同一平面。該照明裝置50所發出之光線同樣係以一發光 軸線40為中心向周圍發散，該發光軸線4〇係與各該反射 單20之上、下曲面焦點連線相互平行且位於同一平面並 垂直於該開口平面6〇，在本實施例中，該發光軸線4〇即為 位於中間之反射罩2〇之上、下曲面焦點連線。該等反射罩 201205001 20内部所設置之發光元件30係排列成一平行於該開口平面 60之直線62 ’亦即，該直線62係垂直於該發光軸線40。 藉此’該照明裝置50所投射出之光線同樣可形成如第五圖 所示之光型，不但可符合ECE R19之規範，亦具有省電及 光線利用率佳之優點。除此之外，由於該照明裝置50具有 分散排列的三個發光元件30，因此不但具有較大之亮度， 且與相同亮度之一般照明裝置比較，具有更佳之散熱性。 由前述二實施例可得知，本發明所提供之照明裝置可 • 依據所需之亮度結合多組反射罩20及發光元件30，如此一 來，該照明裝置所投射出之光線不但可具有足夠之亮度， 且可形成符合ECE R19規範之光型，更具有節能省電且散 熱性佳等優點。除此之外，前述二實施例所提供之照明裝 置中，各該反射罩20内可於較接近開口 28之位置更設置 有一透鏡7〇 (如第七圖所示）’該透鏡7〇具有朝向該開口 28之-第-曲面71及-第二曲面72 ’係分別鄰近於該反 φ 射罩20之上、下曲面，並配合該反射罩20所產生的輻射 光場而有不同的曲率分佈，本實施例所提供者，該第一曲 面71係呈不酬曲率之雜’該第二曲面72之曲率半徑 係較該第-曲面71之曲率半徑為大；藉此，該透鏡7〇可 將會自反射罩20開口 28發散出射的光線收歛再投射出 去，如此-來’可更提升該照明裝置之光線利用率。 最後，必須再次說明，本發明於前揭實施例中所揭露 _成元件，僅為舉例說明，並非用來限制本案之範圍， 其他等效元件的替代或變化，亦應為本案之申請專利範圍 9 201205001 所涵蓋。 201205001 【圖式簡單說明】 第一圖為ECER19規範之前霧燈光型示意圖； 第二圖為本發明一第一較佳實施例所提供之照明裝置 的立體示意圖； 第三圖為本發明該第一較佳實施例所提供之照明裝置 的側視示意圖； 第四圖為本發明該第一較佳實施例所提供之照明裝置 的頂視不意圖， 第五圖為本發明該第一較佳實施例所提供之照明裝置 的光型示意圖； 第六圖為本發明一第二較佳實施例所提供之照明裝置 的頂視不意圖，以及 第七圖為本發明一第三較佳實施例所提供之照明裝置 的侧視示意圖。 【主要元件符號說明】 焦點222 焦點242 連接部27 投影平面42 照明裝置10 反射罩20 上曲面22 下曲面24 側平面26 開口 28 發光元件30 發光轴線40 11 201205001 直線62 第一曲面71 中央區域422 照明裝置50 開口平面60 透鏡70 第二曲面72In addition, the "LED planar light source and profile headlight constructed therewith" disclosed in US Pat. No. 6,946,672 B2 is a reflective type of light that constitutes a planar light source with LEDs, and the LED planar light source is placed at the focus of a parabolic reflector. To produce a radiant light field of parallel projected illumination. However, the size of the reflector of the reflective lamp must be large in order to effectively converge the LED light sources that are illuminating toward the periphery to project sufficient light intensity, and thus there is still room for improvement. 201205001 [Invention content] Yes! In view of the above-mentioned deficiencies, the main object of the present invention is to provide an illumination device that not only produces an up and down asymmetrical light pattern to comply with the ece (four) specification, but also has the advantages of power saving and light utilization. To achieve the above object, the illumination device of the present invention comprises a reflector and a light-emitting element. The inner surface of the reflector has an upper curved surface, a lower curved surface, and a two-sided plane connected between the upper and lower curved surfaces, and the light-emitting element is disposed on the curved cover and the lower curved surface of the reflective cover. between. Thereby, the light generated by the illuminating element is reflected by the reflector and the lower curved surface, and the light is projected outward, and the light projected by the illuminating device is accompanied by the difference in the curvature design of the upper and lower surfaces. The lighting is different and has different brightness, so that the light pattern of the vehicle lighting device meeting the specific specification can be adjusted, and since the specific light type effect is not achieved by blocking part of the light generated by the light emitting element, the lighting device has good Light utilization. Furthermore, the illumination device can further be provided with a lens with different curvatures up and down to increase the light collection efficiency of the light reflected by the reflector to further improve the light utilization efficiency of the illumination device. Detailed construction, features, assembly or use of the illumination device provided by the present invention will be described in the detailed description of the subsequent embodiments. However, it should be understood by those of ordinary skill in the art that the present invention is not limited to the scope of the invention. 201205001 . Bellows 07: i\ j The following is a detailed description of the technical contents and features of the present invention by using the illustrated embodiments in conjunction with the accompanying drawings, wherein: (5) The second figure is a first comparison of the present invention. 3 is a schematic side view of a lighting engine provided by the first preferred embodiment of the present invention; and FIG. 1 is a first preferred embodiment of the present invention. FIG. 5 is a top view of the illumination provided by the embodiment of the present invention; FIG. 5 is a schematic view showing the light pattern of the % device provided in the first preferred embodiment of the present invention; A top view of the illumination provided; and, ''the seventh' is a side view of a lighting cartridge provided by a second preferred embodiment of the present invention. The applicant is first described here, and in the embodiments to be described below, the same reference numerals indicate the same or similar elements and features. 3. First Preferred Embodiment and a Light Emitting Element Referring first to second to fourth drawings, a lighting device 10 according to the present invention includes a reflecting cover 20, 30. The reflector 20 has an open casing shape, and its inner surface has an upper curved surface 22, a lower curved surface 24, and two side planes 26 connected between the upper and lower curved surfaces 22, 24. The connection of the 201205001 of the upper and lower curved surfaces 22, 24 forms a connecting portion 27 of the reflecting cover 20, and the opening portion 28 of the reflecting cover 20 is formed with respect to the connecting portion 27. The radius of curvature of the upper curved surface 22 is smaller than the radius of curvature of the lower curved surface 24, and therefore, the focal point 222 of the upper curved surface 22 is closer to the connecting portion 27 than the focal point 242 of the lower curved surface 24, and the two focal points 222 The connection of 242 defines one illumination axis 40 of the illumination device. Each of the side planes 26 is inclined outwardly from the connecting portion 27 toward the opening 28 such that the cross-sectional width of the reflecting cover 2 〇 perpendicular to its light-emitting axis 4 is gradually widened from the connecting portion 27 toward the opening 28; The two-sided plane 26 provided by the embodiment has an outwardly inclined angle which is centered on the light-emitting element and is symmetrical with respect to the opening 28. Preferably, the angle is less than 10 degrees and greater than 5 degrees (of which 8 degrees is Best) can be applied to the vehicle device with a viewing angle that meets specific lighting specifications. The light-emitting element 30 is a light-emitting diode disposed between the curved surface focus 222 and the lower curved surface focus 224 of the reflective cover 2, such that the light generated by the light-emitting element 30 passes through the reflective cover 2 above and below. After the curved surface 22, the % and the two side planes 26 are reflected, the light rays that are diverging around the light-emitting axis 40 are projected toward the opening σ 28, and the diverging direction corresponds to the left and right sides of the light-emitting axis 40. The symmetrical brightness distribution corresponds to an asymmetric brightness distribution above and below the light-emitting axis 40 and a greater degree of distribution on the lower side to conform to the specific specifications of the vehicle lighting device. The illuminating device 1 () provided in the foregoing embodiment can be used to be disposed at the front end of the automobile as the front fog lamp of the automobile. Due to the difference in the curvature design of the upper and lower curved surfaces 22, 24, the light 201205001 projected by the illumination device 1 具有 has different brightness depending on its projection height, and the two side planes 26 are inclined outwardly. The light is directed toward the left and the right by two angles; therefore, the light projected by the illumination device 10 can be perpendicular to the opening axis of the opening device, and the projection axis of the illumination axis 4 is perpendicular to each other. 42 produces a light pattern as shown in the fifth figure, which is located on the light-emitting axis 4〇L and has an asymmetric brightness distribution on the lower two sides. In detail, the brightness distribution of the ship's t-set 1 () on the projection plane 42 is reduced from a vertical length and the horizontal length is longer than the Z-direction central area 422 toward the upper, lower, left and right. And the resulting light pattern conforms to those as specified in ECE R19. Further, since the specific light type effect is not achieved by blocking a part of the light generated by the hair piece 30, the lighting device 1G has a good light rate. Moreover, since the light-emitting element 30 is a light-emitting diode, the lighting device can further have the advantages of energy saving and power saving. Referring to the sixth embodiment, a second embodiment of the present invention provides a month device 50 in combination with two sets of reflectors 2 and light-emitting elements 30 of the first preferred embodiment. In detail, each of the reflectors 2 has a side plane 26 adjacent to one side plane 26 of the other reflector cover 2, and the openings 28 of the reflectors face in the same direction and are located in the same opening plane 6 In addition, the upper and lower curved surface focus lines of the reflectors 20 are parallel to each other and are in the same plane. The light emitted by the illuminating device 50 is also diverged around the center of the light-emitting axis 40. The light-emitting axis 4 is parallel to the reflection line 20 and the lower curved surface focus line and is in the same plane and perpendicular to The opening plane 6〇, in the embodiment, the light-emitting axis 4〇 is the reflection cover 2〇 located in the middle, and the lower curved surface focus is connected. The light-emitting elements 30 disposed inside the reflectors 201205001 20 are arranged in a line 62' parallel to the plane of the opening 60. That is, the line 62 is perpendicular to the axis of illumination 40. Therefore, the light projected by the illumination device 50 can also form a light pattern as shown in the fifth figure, which not only conforms to the specifications of the ECE R19, but also has the advantages of power saving and light utilization. In addition, since the illuminating device 50 has three illuminating elements 30 arranged in a distributed manner, it not only has a large brightness, but also has better heat dissipation properties than a general illuminating device of the same brightness. It can be seen from the foregoing two embodiments that the illumination device provided by the present invention can combine multiple sets of reflectors 20 and light-emitting elements 30 according to the required brightness, so that the light projected by the illumination device can not only have enough The brightness can be formed into an optical type conforming to the ECE R19 specification, and has the advantages of energy saving, heat dissipation and good heat dissipation. In addition, in the illuminating device provided in the foregoing two embodiments, a lens 7 〇 (shown in FIG. 7) may be disposed in each of the reflectors 20 at a position closer to the opening 28. The first-curved surface 71 and the second curved surface 72' facing the opening 28 are respectively adjacent to the upper and lower curved surfaces of the anti-φ hood 20 and have different curvatures in conjunction with the radiant light field generated by the reflector 20 The distribution, in the embodiment, the first curved surface 71 is in the form of an unrecognized curvature. The radius of curvature of the second curved surface 72 is larger than the radius of curvature of the first curved surface 71; thereby, the lens 7〇 The light emitted from the opening 28 of the reflector 20 can be converged and then projected, so that the light utilization of the lighting device can be further improved. Finally, it must be re-explained that the present invention is disclosed in the foregoing embodiments, which are merely illustrative and are not intended to limit the scope of the present invention. The substitution or variation of other equivalent components should also be the scope of patent application of the present invention. Covered by 9 201205001. 201205001 [Simplified description of the drawings] The first figure is a schematic diagram of the fog light pattern before the ECER19 specification; the second figure is a perspective view of the lighting device provided by a first preferred embodiment of the present invention; 4 is a schematic side view of a lighting device provided by the first preferred embodiment of the present invention, and FIG. 5 is a first preferred embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 6 is a top view of a lighting device according to a second preferred embodiment of the present invention, and FIG. 7 is a third preferred embodiment of the present invention. A side view of a lighting device provided. [Description of main component symbols] Focus 222 Focus 242 Connection 27 Projection plane 42 Illumination device 10 Reflector 20 Upper curved surface 22 Lower curved surface 24 Side plane 26 Opening 28 Light-emitting element 30 Light-emitting axis 40 11 201205001 Straight line 62 First curved surface 71 Central area 422 illuminating device 50 opening plane 60 lens 70 second curved surface 72
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