1296585 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種前霧燈，特別是有關一種使用發 光二極體（light emitting diode ; LED)為發光源之前霧燈。 【先前技術】 在目前車用照明之光源發展中源較傳統發光體，例如 白熾燈泡、螢光燈與高強度氣體放電式燈泡（high intensity discharge headlamp ; HID)等等，繼HID被大量使用後， LED由於具有低耗能（僅約傳統燈泡的1〇%)、壽命長（約為 傳統燈泡的10倍）、反應速度快（約傳統燈泡之330倍）與 體積小等優點，因此LED將最有可能取代燈泡成為未來所 廣泛利用之車用照明光源。全球照明產業發展趨勢主要以 「節約能源、環境保護」為宗旨，因此先進光源發展亦以 環保、節能為目標。 目前白光發光二極體（light emitting diode ; LED)之光 源較傳統發光體，例如白熾燈泡、螢光燈與高強度氣體放 電式燈泡（high intensity discharge headlamp ; HID)等等， 具有省電、耐震、閃爍快、長壽命、輝度與溫度安定性、 低電壓起動、無水銀、體積小、配光特性自由度高、商品 設計自由度高、調光控制佳與光維持率高等優點，由此可 知未來LED之應用，非僅具有既有光源之特點，甚至擁有 現在光源沒有之特點，請參考表一所示之白光LED與常用 光源特性的比較，其中白光LED之效率及壽命之數據是在 1296585 LED接面溫度為85°C條件下取得。 光源種類 功率(W) 發光效率（lm/W) 壽命(hrs) 白熾燈 Incandescent 15 8 1,000 白熾燈 Incandescent 100 15 1,000 長壽命白熾燈 135 12 5,000 鹵素燈 20 12 3,000 鹵素燈 300 24 30,00 精緻型鹵素燈 50 12 2,500 精緻型螢光燈 11 50 10,000 螢光燈（Fluorescent) 30 80 20,000 白光 LED2000 一 20 100,000 白光 LED2002 一 30 100,000 白光 LED2005 一 40 100,000 白光 LED2010 一 50 100,000 表一白光LED與常用光源之比較表 但是在目前之前霧燈中，LED光源的應用仍受限於高 亮度LED發光效率低、單位亮度不足與價格過高之因素， 所以在前霧燈之應用上仍有困難，而當高亮度LED在技術 不斷突破與價格下降的情況下，預計高亮度LED之應用在 不久將會有所轉變，逐漸成為市場主流之前霧燈的發光 源。 此外，更由於LED(如高亮度LED)並非點光源特性， 會產生非全方位的光通量分佈形式，所以LED與傳統光源 1296585 (點光源特性）之全方位的發光特性完全不同，除了是因為 其發光晶粒本身尺寸小，加上LED的光通量分佈形式會因 LED封裝型式之不同而有所改變，因此關於LED照明應 用的設計將不能再簡單地在光源上套用傳統光源之聚光 透鏡、反射鏡與遮光片，都必需要利用新的組合設計。 然而，在目前國内外的研究文獻中，從國外車燈大廠 法雷奥（Valeo)汽車集團初期在美國汽車工程學會（SAE ; the Society of Automotive Engineers)所公開的研究文獻中 (SAE paper 03-01-0556)，僅知道其LED前霧燈設計方式 為投射式光學模組（請參考第1圖）且在其光學模組中使用 7顆 LED模組，以及其LED前霧燈具有之光源利用率為 53%(目前傳統投射式車燈之光源利用率為35〜37%)，但是 其光源分佈主要偏於下方（請參考第2圖），容易造成光源 亮度分配上的不平均而造成浪費，因此在實際車燈照明的 應用上仍有相當的關鍵技術需要克服。 另外，近年亞洲車燈大廠日本小系（Koito)車燈公司在 SAE所公開的研究中，只提到其LED車燈設計方式為採用 反射鏡的形式來設計遠光燈與近光燈；其中遠光燈使用14 顆LED模組，且每個模組使用1顆90流明（lm ; lumen， 光通量單位）之LED;近光燈使用13顆LED模組，且每個 模組使用2顆301m之LED;卻並未提及有關前霧燈之設計 方式。 此外，在國内對於LED車燈應用的研究文獻中，目前 除了將LED作為輔助光源而加以應用外，對於LED車燈1296585 IX. Description of the Invention: [Technical Field] The present invention relates to a front fog lamp, and more particularly to a fog lamp using a light emitting diode (LED) as a light source. [Prior Art] In the current development of light source for automotive lighting, more traditional light sources, such as incandescent bulbs, fluorescent lamps and high intensity discharge headlamps (HID), etc., after HID is used in large quantities LEDs have the advantages of low energy consumption (only about 1% of conventional bulbs), long life (about 10 times that of conventional bulbs), fast response speed (about 330 times that of conventional bulbs), and small size. It is most likely to replace the bulb as a lighting source for vehicles that is widely used in the future. The development trend of the global lighting industry is mainly based on the principle of “saving energy and protecting the environment”. Therefore, the development of advanced light sources is also aimed at environmental protection and energy conservation. At present, the light source of the white light emitting diode (LED) is more energy-saving and shock-resistant than the conventional light-emitting body, such as an incandescent light bulb, a fluorescent light, and a high intensity discharge headlamp (HID). Fast flashing, long life, brightness and temperature stability, low voltage starting, mercury free, small volume, high degree of freedom of light distribution, high degree of freedom in product design, good dimming control and high light maintenance. Future LED applications, not only have the characteristics of existing light sources, and even have the characteristics of the current light source, please refer to the comparison of the characteristics of white LEDs and common light sources shown in Table 1. The data of the efficiency and lifetime of white LEDs is at 1296585. The LED junction temperature was obtained at 85 °C. Light Source Type Power (W) Luminous Efficiency (lm/W) Life (hrs) Incandescent Incandescent 15 8 1,000 Incandescent 100 15 1,000 Long Life Incandescent 135 12 5,000 Halogen 20 12 3,000 Halogen 300 24 30,00 Exquisite Halogen 50 12 2,500 Exquisite Fluorescent Lamp 11 50 10,000 Fluorescent Lamp 30 80 20,000 White LED2000 One 20 100,000 White LED2002 One 30 100,000 White LED2005 One 40 100,000 White LED2010 One 50 100,000 Table One White LED with Common Light Source Comparison table, but in the current fog lamps, the application of LED light source is still limited by the low luminous efficiency of high-brightness LED, insufficient unit brightness and high price, so there are still difficulties in the application of front fog lamps, and high Brightness LEDs are expected to change in the near future with the technology breakthrough and price drop, and gradually become the light source of fog lamps before the mainstream of the market. In addition, because LEDs (such as high-brightness LEDs) are not point source characteristics, they will produce a non-omnidirectional form of luminous flux distribution. Therefore, the illuminating characteristics of LEDs and traditional light source 1296585 (point source characteristics) are completely different, except because of The size of the illuminating crystal itself is small, and the form of the luminous flux distribution of the LED will change due to the different types of LED packaging. Therefore, the design of the LED lighting application can no longer simply apply the concentrating lens and reflection of the conventional light source to the light source. Mirrors and visors must be designed with new combinations. However, in the current research literature at home and abroad, from the research literature published by the foreign automotive lamp manufacturer Valeo Automobile Group in the Society of Automotive Engineers (SAE paper) (SAE paper) 03-01-0556), only know that its LED front fog lamp design is a projection optical module (please refer to Figure 1) and use 7 LED modules in its optical module, and its LED front fog lamp has The light source utilization rate is 53% (currently, the light source utilization rate of the conventional projection type lamp is 35 to 37%), but the light source distribution is mainly biased below (please refer to FIG. 2), which easily causes uneven distribution of light source brightness. It is wasteful, so there are still quite a few key technologies to overcome in the application of actual lighting. In addition, in recent years, the Asian car lamp manufacturer Koito headlights company in SAE's research only mentioned that its LED lamp design method is to use the form of mirror to design high beam and low beam; The high beam uses 14 LED modules, and each module uses one 90 lumens (lm; lumen, luminous flux unit) LED; the low beam uses 13 LED modules, and each module uses 2 301m LED; but did not mention the design of the front fog lamp. In addition, in the domestic research literature on the application of LED lights, in addition to the application of LED as an auxiliary light source, for LED lights
1296585 設計則使用多重曲面（multi-reflector ; MR)之設計，然而 MR的設計所產生出的光型，需使用10顆LED模組，但 是若要符合歐洲經濟委員會（ECE ; Economy Commission for Europe)所規範之光型，在實行上會有相當的困難度。 直至最近，在國内外所公開的研究文獻中（如SAE paper 05-01-0862)，對於LED前霧燈之設計僅作概念式的敘述， 對於其真正的使用與設計之技術核心多有所保留或避而 不談。 由上可知，在目前的車外照明燈具中，LED的應用主 要仍侷限於頭燈、第三煞車燈、尾燈、方向燈與停車燈等 部分。因此，LED前霧燈之應用在全球仍屬於初步發展的 階段，且國際上對於前霧燈之法規要求詳盡，特別是歐洲 經濟委員會（ECE ; Economy Commission for Europe)。反觀 國内車燈製造廠，亦尚未建立LED(如高亮度LED)前霧燈 的設計與製造之技術能力。 【發明内容】 因此本發明之目的就是在提供一種耗能量低之前霧 燈，由於發光二極體較傳統光源省電，在維持同樣照度的 要求下，本發明之前霧燈的耗電量較目前發光二極體前霧 燈或是傳統前霧燈更低。 本發明之另一目的就是在提供一種具有良好成像效 果之前霧燈，將可彈性設計之投射透鏡配合發光二極體之 光型，使利用發光二極體為光源之前霧燈，可避免過大的 8 1296585 球面像差出現，使前霧燈可產生清晰之光型。 本發明之又一目的就是在提供一種具有高光源利用 率之刖務燈，利用複合橢圓曲面反射鏡方程式設計之反射 鏡面，充分利用發光二極體之特殊光型，並大幅提高光源 利用率。 本發明之再一目的在提供一種符合國際規範要求之 前霧燈，藉由特殊形狀之遮光片，使前霧燈產生需求之光 型，可符合國際規範（ECE)的要求。 本發明之更一目的就是在提供一種高效能發光二極 體模組之前霧燈，藉由本發明之設計，使發光二極體模組 除了可彈性應用外，並且更可配合發光二極體模組之類型 作最佳化之應用。 根據本發明上述之目的，提出一種使用發光二極體為 光源之前霧燈。包括投射透鏡、反射鏡、發光二極體與遮 光片之組合。依照本發明之一實施例，藉由發光二極體本 身所具有之低耗電量特性以及配合本發明之設計組合，可 使本發明之前霧燈在維持同亮度的情形下，可使用最少的 發光二極體模組，進而使前霧燈具有省電節能的效果。 根據本發明上述之目的，提出一種光型清晰之前霧 燈。包括投射透鏡、反射鏡、發光二極體與遮光片之組合。 此前霧燈藉由非球面透鏡4次方程式所設計之投射透鏡， 使此以發光二極體為光源之前霧燈具有較小之球面像 差，可產生清晰之光型。 根據本發明上述之目的，提出一種高光源利用率之前 1296585 霧燈。包括投射透鏡、反射鏡、發光二極體與遮光片之組 合。此前霧燈之反射鏡的反射鏡面由複合橢圓曲面反射鏡 方程式所設計’可將具有輻射光型之發光二極體的光線聚 焦’同時調整聚焦位置，充分利用發光二極體之光線，使 此前霧燈具有高光源利用率。 根據本發明上述之目的，提出光型符合法規需求之前 務燈。包括投射透鏡、反射鏡、發光二極體與遮光片之組 合。此前霧燈利用之遮光片，配合發光二極體與反射鏡面 所形成之特殊設計，使此前霧燈得以產生需求之光型。 依照本發明之一實施例，將發光二極體、一投射透 鏡、一反射鏡與一遮光片設計組合成本發明之前霧燈，由 於發光二極體較傳統光源（如燈泡）為省電，因此本發明 之前霧燈具有低耗電之特性，可節省能源。此投射透鏡具 有彈性配焦的能力，配合發光二極體之光型，使前霧燈可 產生清楚的光.型。此反射鏡之反射鏡面可將發光二極體之 輻射光型加以調整並聚焦，使發光二極體之光線可充分被 利用，大幅提高前霧燈之整體光源利用率，除了可使前霧 燈產生高亮度，同時可隨配合不同之發光二極體模組作最 佳化之應用。此遮光片具有特殊形狀，可使前霧燈產生特 定需求之光型。 【實施方式】 請參考第3圖，其繪示依照本發明一較佳實施例之前 霧燈之剖面組合示意圖。其中之前霧燈10〇包括投射透鏡 1296585 110、發光二極體120、反射鏡l3〇與遮光片14〇。 投射透鏡110,為一平凸透鏡，在光線聚焦後，再經 過此投射透鏡11〇產生清楚之光型分布。投射透鏡11〇之 材料為一透光材料，此透光材料可以為玻璃、壓克力或是 聚碳酸酯（polycarbonate; PC)。投射透鏡11〇具有一凸面 111，此凸面111利用一非球面透鏡4次曲面方程式所設計 而成，藉由非球面透鏡4次方程式所設計之凸面，可降低 球面像差，形成清晰之光型。 此非球面透鏡4次曲面方程式為： «2 .4 為凸面111 r為圓柱座標的徑項，以直角座標系之表示法為 (其中X、r分別為水平座標與垂直座標）； Λ為此投射透鏡110之頂點曲率半徑； 尤為一調整係數，且與投射透鏡110之聚焦有關，隨投 射透鏡110之凸面111改變而改變，例如當尺=〇時之凸面 為拋物面，而尤=1時之凸面接近球面。因此，本發明所使 用之投射透鏡110，其幾何外形可介於球面與拋物面之 間，故其聚焦能力可藉由改變此調整係數尤，進而改變凸 面111之形狀，使投射透鏡110具有彈性聚焦能力。此外， 在光轴Ζ方向上虛擬有一中心線112通過投射透鏡11〇之 頂點曲率中心。 發光一極體 120(light emitting diode ; LED)，可發出 特定波長光線之半導體發光元件，具有面光源之特性，故 !296585 其光型為非全方位的輻射光型（RadiatiQn pattem)。此發光 二極體12〇位於投射透鏡110之中心線112上。而此發光 -極體12G可以為白光二極體或是高功率發光二極體。 反射鏡130具有一反射鏡面131(請參考第4圖），可 將發光二極體120所產生之特殊輻射光型（Radiati〇n pa«em)的光線，經過反射鏡面131反射後產生聚焦與特殊 的配光控制。反射鏡面131具有垂直橢圓平面與水平橢圓 平面，且垂直橢圓平面之第一焦點位置上設有發光二極體 120。反射鏡面131利用一複合橢圓曲面反射鏡方程式， 使水平橢圓焦點1311與垂直橢圓焦點1312具有共同之第 一焦點，而在光軸方向上之任一橢圓平面與水平橢圓平面 形成一夾角1313 (請參考5圖所示）以產生特殊的配光控 制，用以達到需求的光型。 此複合橢圓曲面反射鏡面方程式，以圓柱座標（r>，z)表 示可得：1296585 The design uses a multi-reflector (MR) design. However, the design of the MR produces a light-emitting pattern that requires 10 LED modules, but to comply with the ECE (Economic Commission for Europe) The light type that is regulated will have considerable difficulty in implementation. Until recently, in the research literature published at home and abroad (such as SAE paper 05-01-0862), the design of the LED front fog lamp is only a conceptual description, and there are more technical cores for its real use and design. Keep or avoid talking. It can be seen from the above that in the current exterior lighting fixtures, the application of LEDs is still mainly limited to the headlights, the third brake lights, the taillights, the direction lights and the parking lights. Therefore, the application of LED front fog lamps is still in the initial stage of development around the world, and international regulations on front fog lamps are detailed, especially the Economic Commission for Europe (ECE). In contrast, domestic lamp manufacturers have not yet established the technical capabilities for the design and manufacture of LED (such as high-brightness LED) front fog lamps. SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a fog lamp before the low energy consumption. Since the light-emitting diode saves electricity compared with the conventional light source, the power consumption of the fog lamp of the present invention is higher than that of the current one. The LED front fog lamp or the conventional front fog lamp is lower. Another object of the present invention is to provide a fog lamp with a good imaging effect, and to combine an elastically designable projection lens with a light-emitting diode, so that the fog lamp can be avoided by using the light-emitting diode as a light source. 8 1296585 Spherical aberrations appear, allowing the front fog lamps to produce a clear light pattern. Another object of the present invention is to provide a vehicular lamp having a high light source utilization rate, which utilizes a reflective mirror surface designed by a compound elliptical curved mirror equation, fully utilizes the special light pattern of the light-emitting diode, and greatly improves the utilization of the light source. A further object of the present invention is to provide a front fog lamp that meets the requirements of international regulations. The special shape of the light shielding sheet enables the front fog lamp to produce a desired light type, which meets the requirements of the International Standard (ECE). A further object of the present invention is to provide a high-performance light-emitting diode module front fog lamp. With the design of the present invention, the light-emitting diode module can be flexibly applied in addition to the light-emitting diode module. The type of group is optimized for use. In accordance with the above objects of the present invention, a fog lamp is disclosed which uses a light-emitting diode as a light source. It includes a combination of a projection lens, a mirror, a light-emitting diode, and a light-shielding sheet. According to an embodiment of the present invention, by using the low power consumption characteristics of the LED itself and the design combination of the present invention, the front fog lamp of the present invention can be used with the least amount of brightness while maintaining the same brightness. The light-emitting diode module further enables the front fog lamp to have the effect of saving electricity and energy. In accordance with the above objects of the present invention, a light-clearing front fog lamp is proposed. It includes a combination of a projection lens, a mirror, a light emitting diode and a light shielding film. Previously, the fog lamp was designed with a projection lens designed by the aspherical lens quadratic equation, so that the fog lamp had a small spherical aberration before the light-emitting diode was used as the light source, and a clear light pattern could be produced. In accordance with the above objects of the present invention, a fog light of 1296585 prior to high light source utilization is proposed. It includes a combination of a projection lens, a mirror, a light-emitting diode, and a light shielding film. Previously, the mirror surface of the mirror of the fog lamp was designed by the compound elliptical curved mirror equation to "focus the light of the illuminating light-emitting diode" while adjusting the focus position, making full use of the light of the light-emitting diode. Fog lights have high light source utilization. In accordance with the above objects of the present invention, it is proposed that the light type meets regulatory requirements before the service light. It includes a combination of a projection lens, a mirror, a light-emitting diode, and a light shielding film. Previously, the fog light used in the fog lamp, combined with the special design of the light-emitting diode and the mirror surface, enabled the previous fog lamp to produce the required light type. According to an embodiment of the present invention, a light-emitting diode, a projection lens, a mirror and a light-shielding chip are combined to form a fog lamp before the invention, since the light-emitting diode is more power-saving than a conventional light source (such as a light bulb), The fog lamp of the present invention has the characteristics of low power consumption and can save energy. The projection lens has the ability of elastic focusing, and the light type of the light-emitting diode enables the front fog lamp to produce a clear light type. The mirror surface of the mirror can adjust and focus the radiation pattern of the light-emitting diode, so that the light of the light-emitting diode can be fully utilized, and the overall light source utilization of the front fog lamp can be greatly improved, except that the front fog lamp can be used. Produces high brightness and can be optimized for use with different LED modules. This visor has a special shape that allows the front fog lamp to produce a light pattern of a specific need. [Embodiment] Please refer to FIG. 3, which is a schematic cross-sectional view of a prior art fog lamp according to a preferred embodiment of the present invention. The front fog lamp 10 includes a projection lens 1296585 110, a light emitting diode 120, a mirror l3, and a light shielding film 14A. The projection lens 110 is a plano-convex lens which, after being focused by the light, passes through the projection lens 11 to produce a clear light distribution. The material of the projection lens 11 is a light transmissive material, which may be glass, acrylic or polycarbonate (PC). The projection lens 11A has a convex surface 111 which is designed by using an aspherical lens quadratic equation. The convex surface designed by the aspherical lens quadratic equation can reduce the spherical aberration and form a clear light type. . The fourth-order surface equation of this aspherical lens is: «2 .4 is the convex surface 111 r is the diameter term of the cylindrical coordinate, which is expressed by the rectangular coordinate system (where X and r are horizontal coordinates and vertical coordinates, respectively); The radius of curvature of the apex of the projection lens 110; in particular, an adjustment coefficient, which is related to the focus of the projection lens 110, and changes with the convex surface 111 of the projection lens 110, for example, when the ruler = 〇, the convex surface is a paraboloid, and especially when The convex surface is close to the spherical surface. Therefore, the projection lens 110 used in the present invention can have a geometric shape between the spherical surface and the paraboloid surface, so that the focusing ability can be changed by changing the adjustment coefficient, thereby changing the shape of the convex surface 111, so that the projection lens 110 has elastic focusing. ability. Further, a center line 112 is virtually in the direction of the optical axis 通过 passing through the center of curvature of the projection lens 11 顶点. A light-emitting diode (LED), a semiconductor light-emitting element that emits light of a specific wavelength, has the characteristics of a surface light source, so the light pattern is a non-omnidirectional radiation type (RadiatiQn Pattem). The light emitting diode 12 is located on the center line 112 of the projection lens 110. The illuminating body 12G can be a white light diode or a high power light emitting diode. The mirror 130 has a mirror surface 131 (refer to FIG. 4), and the light of the special radiation pattern (Radiati〇n pa«em) generated by the LED body 120 is reflected by the mirror surface 131 to generate focus and Special light control. The mirror surface 131 has a vertical elliptical plane and a horizontal elliptical plane, and the light-emitting diode 120 is disposed at a first focus position of the vertical elliptical plane. The mirror surface 131 utilizes a compound elliptical curved mirror equation such that the horizontal elliptical focus 1311 and the vertical elliptical focus 1312 have a common first focus, and any elliptical plane in the optical axis direction forms an angle 1313 with the horizontal elliptical plane (please Refer to Figure 5 to create a special light distribution control to achieve the desired light pattern. This compound elliptical surface mirror equation is expressed as a cylinder coordinate (r>, z):
其中，α⑷與φ)分別為橢圓面之長軸與短軸之半軸長 方程式， α{ψ) = αχ cos2 φΛ-αγ sin2 φ 5 rffj b = ^a2 -c2 ， c為此複合擴圓曲面第一焦點與弟二焦點間之焦距； #1313為反射鏡面131在光轴方向（Z軸）上之任一橢圓 平面與水平橢圓平面形成之夾角。 r = Vx2 +Y2 12 1296585 此反射鏡面131之配光控制參數^：為： S = l{ax -αγ) 其中’ ％與〜分別在尤平面與r平面上之橢圓面之長軸半 長。藉由調整參數S，可使反射鏡面131調整發光二極體 110之光型的聚焦位置，因此可充份利用發光二極體120 光線，提高光源利用率。Where α(4) and φ) are the half-axis length equations of the major and minor axes of the elliptical surface, respectively, α{ψ) = αχ cos2 φΛ-αγ sin2 φ 5 rffj b = ^a2 -c2 , c for this compound rounded surface The focal length between the first focus and the second focus; #1313 is the angle formed by any elliptical plane of the mirror surface 131 in the optical axis direction (Z-axis) and the horizontal elliptical plane. r = Vx2 + Y2 12 1296585 The light distribution control parameter ^ of this mirror surface 131 is: S = l{ax -αγ) where '% and ~ are respectively half length of the major axis of the elliptical plane on the plane of the plane and the r plane. By adjusting the parameter S, the mirror surface 131 can adjust the focus position of the light-emitting diode 110, so that the light of the light-emitting diode 120 can be fully utilized to improve the light source utilization.
為遮光片140設於投射透鏡11〇與發光二極體12〇之 間，可用以阻擋不必要之光線通過，以利產生清晰的明暗 截止線（cut-off line)，使前霧燈1〇〇具備符合法規要求之光 型。此外’此遮光片14〇可阻擋射向光型上方的光線以避 免造成眩光。 請參考第6圖所示之遮光片14〇之平面示意圖，在本 發明一較佳實施例中，遮光片14〇具有一特定形狀，且其 形狀為略呈半圓形之圓扇形且具有一上緣141，此上緣141 之中心處分別往左右兩側向上傾斜，此兩側向上傾斜之上 緣141分別與通過中心處之水平線形成上緣夾角143(旬， 此上緣夾角143為3度（θ=3。）具有較佳的遮光效果。在本 發明另一實施例中，而此圓扇形之圓心角142之角度大於 180度（180。）。此外，此遮光片140上緣141之中心處與通 過投射透鏡110之中心線112有一垂直間距144(幻之高度。 遮光片140的設計形狀，可配合前霧燈1〇〇之發光二 極體120的輻射光型，使前霧燈100產生之光型可符合歐 州、、【濟委員會（Economic Commission for Europe ; ECE)之 别務燈法規要求的光型（請參考第7圖）。 13 1296585 古口第7圖所示為ECE前霧燈法規之25公尺測試板驗光 凴區；而在第7圖中之驗光亮區主要有1)區（2〇如;〇)、匕1 區（Zone丘-1)與e_2區（Zone E-2)，其中以v為垂直軸，h 為水平軸。D區的範圍：左右1〇·2度（45〇公分）内、往下 1·72〜3·43度（75〜150公分）内；Zone £-；ι的範圍··向右約 1〇·2〜21.8度（450〜1〇〇〇公分）内、往下約172〜3·43度 (75〜150公分）内；z〇ne Ε_2的範圍：向左ι〇·2〜2ι·8度 (450〜1〇00公分）内、往下172〜3·43度（75〜15〇公分）内。 其中’ D區的照度需大於等於h5勒克司（Lux) ; Eq區與 E-2區的照度皆需大於等於〇.5勒克司。 請再參考第8圖所示之前霧燈的光學系統示意圖，圖 中尤為水平座標軸，y為垂直座標軸，z為光轴方向之座標 軸。其中在投射透鏡110之凸面1U的另一侧設有發光二 極體120，此發光二極體120置於反射鏡13()之反射鏡面 131的垂直橢圓之第一焦點位置並朝上輻射光線，且在凸 面與發光二極體120間設有遮光片140以形成明暗截 止線（cut-off line)，產生法規需求之光型。 在本發明另一實施例之前霧燈1〇〇中，投射透鏡110 之材料為玻璃材質，其折射率為1.508，且此投射透鏡11〇 之口徑為67mm。表二為本實施例之實測數值。 口徑 (mm) 厚度 (mm) 焦距 (mm) 光軸上最大的 球差值(mm) 頂點曲率半 徑 i?(mm) 係數尺 折射率 67 19.3 52·1 〜53·1 1.0 33.5 0.60 1.508 67 22.8 41.9 〜43·0 1.1 29.6 0.64 1.508 67 24.1 39.5 〜40.7 1.2 28.6 0.67 1.508 1296585 表一本發明别霧燈之投射透鏡實測值 當曲率半徑及=33.5麵、調整係數“〇辦，使投射透鏡 110具有最小之球面像差L0麵、焦距介於52 i〜53 i麵當改 變曲率半徑㈣·6麵、並找出最適㈣調整係數⑽4時 具有最小之球差值Llww，會使投射透鏡110之焦距縮短 為钆9〜43.0mm ;進一步，當Λ=28.6^^、尤=〇67時，投射透鏡 之焦距進一步縮短為汍5〜4〇加所。由本實施例之說明可 知，本發明之前霧燈可藉改變曲率半徑及並由調整一簡單 之調整係數火，使球面像差維持相當小(小於12麵)情況 下，可縮短燈具縱深。 凊參考第9圖所示，其繪示係依照在上述實施例中之 實際投射光型示意圖。其中，配合投射透鏡11〇、發光二 極體12〇(光通量分佈型式採用第1〇圖所示 type)、反射鏡130與遮光片140之組合設計，在上述之遮 光片140中，當3 = 1.4麵時，由於不會阻擋中心區域（請一 併參考第7圖中之最亮區；]0區）的光線通過，因此其所產 生之光型具有最高亮度，且其光型不會破壞明暗截止線 (cut-off line)的分布；另外，當上緣夾角143(幻為3度（此 時圓心角角度為I86。），可產生具有筆直且最清楚之明暗截 止線的光型。 在本發明之又一實施例中（請合併參考第9、1()圖）， 當LED之流明數達到240 lm時，應用本發明前霧燈所產 生之光域範圍（左右可達22度以上，如第9圖所示）可符 15The light shielding film 140 is disposed between the projection lens 11 〇 and the light emitting diode 12 ,, and can be used to block unnecessary light from passing through, so as to produce a clear cut-off line, and the front fog lamp is turned on. 〇 Have a light type that meets regulatory requirements. In addition, the visor 14 阻挡 blocks light incident on the light pattern to avoid glare. Referring to the plan view of the visor 14 〇 shown in FIG. 6, in a preferred embodiment of the present invention, the visor 14 has a specific shape and is slightly semicircular in shape and has a shape. The upper edge 141, the center of the upper edge 141 is inclined upward toward the left and right sides, respectively, and the upper edges of the upper edges 141 are respectively inclined to form an upper edge angle 143 with the horizontal line passing through the center, and the upper edge angle 143 is 3. The degree (θ=3.) has a better shading effect. In another embodiment of the invention, the angle of the central angle 142 of the circular sector is greater than 180 degrees (180 Å). Further, the upper edge 141 of the visor 140 The center is at a vertical distance 144 from the center line 112 of the projection lens 110 (the height of the phantom). The design shape of the light shielding sheet 140 can match the radiation pattern of the light-emitting diode 120 of the front fog lamp, so that the front fog The light type produced by the lamp 100 can conform to the light type required by the European Commission and the Economic Commission for Europe (ECE) (see Figure 7). 13 1296585 Ancient Figure 7 shows the ECE before Fog light regulations 25 meters test board optometry area The illuminating area in Fig. 7 mainly has 1) area (2〇; 〇), 匕1 area (Zone 丘-1) and e_2 area (Zone E-2), where v is the vertical axis. h is the horizontal axis. The range of the D zone is within 1 〇·2 degrees (45 〇 cm) and down to 1.72~3·43 degrees (75 to 150 cm); the range of Zone £-; ι·· To the right is about 1〇·2~21.8 degrees (450~1〇〇〇 cm), and about 172~3·43 degrees (75~150cm); z〇ne Ε_2 range: to the left 〇 2~2ι·8 degrees (450~1〇00 cm) inside and down 172~3·43 degrees (75~15〇 cm). The illumination of 'D area needs to be greater than or equal to h5 Lux (Eux); Eq The illuminance of the zone and the E-2 zone must be greater than or equal to 勒.5 lux. Please refer to the optical system diagram of the fog lamp shown in Figure 8, especially the horizontal coordinate axis, y is the vertical coordinate axis, and z is the optical axis direction. a coordinate axis, wherein the other side of the convex surface 1U of the projection lens 110 is provided with a light-emitting diode 120, and the light-emitting diode 120 is placed at a first focus position of a vertical ellipse of the mirror surface 131 of the mirror 13 ( Radiating light, and convex and convex The light-shielding sheet 140 is disposed between the photodiodes 120 to form a cut-off line, which produces a light type required by regulations. In the fog lamp 1 之前 before the other embodiment of the present invention, the material of the projection lens 110 is The glass material has a refractive index of 1.508, and the diameter of the projection lens 11 is 67 mm. Table 2 is the measured value of the embodiment. Caliber (mm) Thickness (mm) Focal length (mm) The largest spherical difference on the optical axis (mm) Curvature radius i? (mm) Coefficient of refractive index 67 19.3 52·1 ～53·1 1.0 33.5 0.60 1.508 67 22.8 41.9 ～43·0 1.1 29.6 0.64 1.508 67 24.1 39.5 ～40.7 1.2 28.6 0.67 1.508 1296585 The measured value of the projection lens of the invention of the fog lamp is the radius of curvature and the =33.5 surface, and the adjustment coefficient is "when the projection lens 110 has the smallest spherical aberration L0 surface, and the focal length is between 52 i and 53 i. Radius (four)·6 faces, and find the optimum (four) adjustment coefficient (10) 4 with the smallest spherical difference Llww, which will shorten the focal length of the projection lens 110 to 钆9~43.0mm; further, when Λ=28.6^^, especially=〇 At 67 o'clock, the focal length of the projection lens is further shortened to 汍5~4〇 The. As can be seen from the description of the present embodiment, the front fog lamp of the present invention can shorten the depth of the lamp by changing the radius of curvature and adjusting the fire by a simple adjustment factor to maintain the spherical aberration relatively small (less than 12 faces). Referring to Fig. 9, the drawing is a schematic view of the actual projected light pattern in the above embodiment. Wherein, in combination with the projection lens 11 〇, the light-emitting diode 12 〇 (the light flux distribution pattern is of the type shown in FIG. 1 ), and the combination of the mirror 130 and the light shielding sheet 140 , in the above-mentioned light shielding sheet 140 , when 3 = 1.4 surface, because it will not block the central area (please refer to the brightest area in Figure 7;] 0 area) light, so the light pattern produced by it has the highest brightness, and its light type will not destroy The distribution of the cut-off line; in addition, when the upper edge angle 143 (the magic angle is 3 degrees (in this case, the angle of the central angle is I86.), a light pattern having a straight and clearest cut-off line can be produced. In still another embodiment of the present invention (please refer to the figure 9 and 1 () together, when the lumen number of the LED reaches 240 lm, the range of the light field generated by the front fog lamp of the present invention is applied (up to 22 degrees left and right) Above, as shown in Figure 9) can be 15
1296585 ECE合法規要求（左右21.8度），因此以目前（2005年）市面 上所取得亮度最高之白光LED(Luxeon V emitter，每顆120 lm)而言，應用本發明之前霧燈僅需使用2顆此白光LED 模組。另外，若當LED光通亮達到每顆240 lm時，應用 本發明之前霧燈僅需使用1顆LED模組。因此可知本發明 之前霧燈之設計方式，除了可彈性應用發光模組外，更可 最佳化使用發光模組。 當LED的光通量分佈型式從Lambertian type(請再參 考第10圖）改為Batwing(請參考第11圖）時，本發明之前 霧燈仍具有相當高之光源利用率。請參考表三所示，其内 容為在不同光型下，反射鏡面與遮光片以發光二極體為光 源時，其所具有之光源利用3 % ° 光源利用率 Light Patteni^^^^ Reflector (%) Screen (%) Total (%) (ReflectorxScreen ) Lambertian type 79 91 72 Batwing type 81 91 74 表三 不同光型下反射鏡面與遮光片所具有之光源利用 率 由上可知，本發明之前霧燈以發光二極體為光源時， 具有七成以上之光源利用率。而表四所示為本發明之前霧 燈與其他投射式模組比較。其中，傳統前霧燈投射系統光 源利用率在四成以下，而文獻SAE paper 2003-01-0556採 用的LED投射系統之光源利用率約五成左右）。 161296585 ECE compliance requirements (21.8 degrees left and right), so in the current (2005) the highest brightness of the white LED (Luxeon V emitter, each 120 lm), the fog lamp only needs to use 2 before applying the invention This white LED module. In addition, if the LED light is on at 240 lm each, the fog lamp only needs to use one LED module before applying the present invention. Therefore, it can be seen that the design method of the fog lamp of the present invention can optimize the use of the light-emitting module in addition to the flexible application of the light-emitting module. When the luminous flux distribution pattern of the LED is changed from Lambertian type (please refer to Fig. 10) to Batwing (please refer to Fig. 11), the fog lamp of the present invention still has a relatively high light source utilization rate. Please refer to Table 3, the content is that under different light types, when the mirror surface and the light shielding film are used as the light source, the light source has a light source utilization rate of 3 % ° Light Patteni^^^^ Reflector ( %) Screen (%) Total (%) (ReflectorxScreen) Lambertian type 79 91 72 Batwing type 81 91 74 Table 3 The light source utilization of the mirror surface and the light shielding film under different light patterns is known from the above, the fog lamp of the present invention When the light-emitting diode is a light source, it has a utilization ratio of 70% or more. Table 4 shows the comparison of the previous fog lamps with other projection modules. Among them, the traditional front fog lamp projection system uses less than 40% of the light source utilization rate, while the light source utilization rate of the LED projection system used in the document SAE paper 2003-01-0556 is about 50%. 16
1296585 投射式模組 光源利用率 傳統投射系統（H7、9006、HID光源） 35 〜37% SAE paper 2003-01-0556採用的投射系統（LED光源） 53% 本發明之前霧燈（LED光源） 72 〜74% 表四 各種投射式模組光源利用率之比較 由表四可知，本發明之前霧燈在光源利用率方面遠比 傳統之投射式車燈或文獻SAE paper 2003-01-0556中所採 用的LED投射系統之光源利用率具有更優異的表現。 請參考表五所示，其内容為ECE法規前霧燈亮區各測 試區域上認證規格照度要求值與為本發明之前霧燈100設 計之照度值的比較，其結果證實本發明之前霧燈100的照 度在每個量測區域（D區照度在1.9 Lux以上、E-1區與E-2 區的照度皆在0.7 Lux以上）皆可符合ECE法規的要求。 測試區 範圍（角度） ECE照度要求 (Lux) 本發明 (Lux ) Zone D Η ： 10.2L~10.2R V : 1·72〜3-43D ^1.5 ^ 1.9 Zone E_1 Η ： 10.2R~21.8R V : 1·72〜3.43D ^0.5 ^0.7 Zone E-2 Η ： 10.2L~21.8L V : 1·72〜3.43D ^0.5 ^0.7 表五 ECE照度要求值與本發明之照度值比較 17 I296585 雖然本發明已以一較佳實施例揭露如上，然其並非用 以限定本發明，任何熟習此技藝者，在不脫離本發明之精 神和範圍内’當可作各種之更動與潤飾，因此本發明之保 護範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 為讓本發明之上述和其他目的、特徵、優點與實施例 能更明顯易懂，所附圖式之詳細說明如下： 第1圖係繪示為法國Valeo汽車集團在SAE中所公開 之文獻中，LED前霧燈以投射式光學模組的設計示意圖。 第2圖係繪示為法國yaie〇汽車集團在SAE中所公開 之文獻中，LED前霧燈之投射光型示意圖。 第3圖係繪示依照本發明一較佳實施例之前霧燈之剖 面組合示意圖。 第4圖係繪示依照本發明一較佳實施例所使用之反射 鏡之立體示意圖。 第5圖係繪示依照本發明一較佳實施例所使用之複合 橢圓曲面之幾何關係示意圖。 第6圖係繪示依照本發明一較佳實施例所使用之遮光 片平面示意圖。 第7圖為歐洲經濟委員會（ECE)在法規中所要求之前 霧燈光型示意圖。 第8圖係繪示依照本發明之一較佳實施例之前霧燈之 18 1296585 光學組合示意圖。 第9圖係繪示依照本發明之另一較佳實施例在使用遮 光片後產生之最佳光型示意圖。 第10圖係繪示Lambertian type之光通量分佈型式示 意圖。 第11圖係繪示Batwing type之光通量分佈型式示意 【主要元件符號說明】 WG :前霧燈 111 ·凸面 120 :發光二極體 131 :反射鏡面 1312 :垂直橢圓焦點 14〇 :遮光片 142 :圓心角 110 :投射透鏡 112 :中心線 130 :反射鏡 13 11 :水平橢圓焦點 1313 :夾角 141 :上緣 143 :上緣夾角 144 :垂直間距1296585 Projection module light source utilization traditional projection system (H7, 9006, HID light source) 35 ~ 37% SAE paper 2003-01-0556 projection system (LED light source) 53% fog light (LED light source) before the invention 72 ~74% Table 4 Comparison of Light Source Utilization Ratios of Various Projection Modules As can be seen from Table 4, the fog lamps of the present invention are far superior to the conventional projection type lamp or document SAE paper 2003-01-0556 in terms of light source utilization. The light source utilization of the LED projection system has a better performance. Please refer to Table 5 for the comparison of the illuminance requirements of the certification specifications on the test areas of the front fog lights in the ECE regulations and the illuminance values of the fog lamps 100 before the present invention. The results confirm the fog lamps 100 of the present invention. The illuminance can meet the requirements of the ECE regulations in each measurement area (the illumination in the D area is above 1.9 Lux, and the illumination in the E-1 area and the E-2 area is above 0.7 Lux). Test area range (angle) ECE illumination requirement (Lux) The present invention (Lux) Zone D Η : 10.2L~10.2RV : 1·72~3-43D ^1.5 ^ 1.9 Zone E_1 Η : 10.2R~21.8RV : 1· 72~3.43D ^0.5 ^0.7 Zone E-2 Η : 10.2L~21.8LV : 1·72~3.43D ^0.5 ^0.7 Table 5 ECE illuminance requirement value is compared with the illuminance value of the present invention 17 I296585 Although the present invention has been A preferred embodiment is disclosed above, but it is not intended to limit the invention, and any person skilled in the art can make various modifications and retouchings without departing from the spirit and scope of the invention. This is subject to the definition of the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; In the literature disclosed in the document, the LED front fog lamp is a schematic diagram of the design of the projection optical module. Fig. 2 is a schematic view showing the projected light pattern of the LED front fog lamp in the document disclosed by the French yaie〇 automobile group in SAE. Figure 3 is a cross-sectional view showing the combination of the front fog lamps in accordance with a preferred embodiment of the present invention. Figure 4 is a perspective view of a mirror used in accordance with a preferred embodiment of the present invention. Figure 5 is a schematic diagram showing the geometric relationship of a composite elliptical surface used in accordance with a preferred embodiment of the present invention. Figure 6 is a plan view showing a visor used in accordance with a preferred embodiment of the present invention. Figure 7 is a schematic diagram of the fog light pattern before the requirements of the European Economic Commission (ECE). Figure 8 is a schematic view showing the optical combination of the prior art fog lamp 18 1296585 in accordance with a preferred embodiment of the present invention. Figure 9 is a diagram showing the optimum light pattern produced after the use of a visor in accordance with another preferred embodiment of the present invention. Figure 10 is a diagram showing the luminous flux distribution pattern of the Lambertian type. Figure 11 shows the luminous flux distribution pattern of the Batwing type. [Main component symbol description] WG: front fog lamp 111 · convex surface 120: light-emitting diode 131: mirror surface 1312: vertical elliptical focus 14〇: light-shielding sheet 142: center Angle 110: Projection lens 112: Center line 130: Mirror 13 11 : Horizontal ellipse focus 1313: Angle 141: Upper edge 143: Upper edge angle 144: Vertical spacing