M391490 五、新型說明： 【新型所屬之技術領域】 本創作是有關於一種車用光學模組，且特別是有關於 車輛前方照明之用的車用光學模組。 【先前技術】 在目前一般市場上，汽車照明設計之主要標準有歐洲 經濟委員會(Economic Commission for Europe ; ECE)及汽車 ® 工程師學會（Society of Automotive Engineers ; SAE)法規的 配光標準。以下係以ECE為例來加以說明，然而以下本說 明書討論之内容並不侷限在ECE法規之範圍内，其亦可應 用至如SAE之其他法規中。M391490 V. New description: [New technical field] This creation is about a vehicle optical module, and in particular, a vehicle optical module for vehicle front lighting. [Prior Art] In the current general market, the main standards for automotive lighting design are the Emissions Standards of the Economic Commission for Europe (ECE) and the Society of Automotive Engineers (SAE). The following is an example of ECE. However, the following discussion of this manual is not limited to the scope of ECE regulations, and it can be applied to other regulations such as SAE.
在ECE法規的配光標準中，遠光燈及近光燈具有不同 的的配光要求，其中遠光燈的配光要求為具有足夠大的發 光強度與足夠寬的照明範圍，同時要求遠光光束(最大照度 點)儘量靠近中心。針對遠光燈配光標準部分，ECE法規僅 要求測試配光屏幕上焭區之五個測試點的照度，其中五個 測試點皆位於水平線上，且左右最遠僅達514 因此 ECE法規所規定之遠光燈配光標準係屬於集中扁平光型。 ECE法規對於近光燈的光型要求主要在於使駕駛人可 以看清前方的路面與右方的狀況（如標識牌、行又 等），但卻不至於影響前方車輛或對向來車之駕敬人的視 線，亦即使前方車輛或對向來車的駕駛人產生眩光的現 象。因此，光型的左上方暗區要求不得過亮，而亮區則 中於右下方。 、” 4 M391490 由於投射式車燈或光學模組具有許多優點，例如：（一） 其可具有較低的頭燈高度，因此可以利用此一特點設計出 能適應各種不同路況之複合燈具，並配合各種轉向機構、 感測器及控制系統’以形成主動（適應性）頭燈轉向照明 系統(Adaptive Front Lighting System ; AFS)，而 AFS 可在 彎路、叉路或南速^亍驶時提南不同路面之照明效果，進而 提高行車安全性；（二）可產生比傳統式頭燈更清楚的明暗 截止線’能有效避免刺激對向來車之駕駛者眼睛’增加舒 適與安全；（三）採用透明燈殼作為保護，非用來擴散或偏 折光線之用，因此可以採用較大傾斜角之燈殼，使車頭及 車燈造形設計能更為流暢及富變化。故此，採用投射式光 學模組乃為目前汽車照明設計之主流。 習知投射式光學模組主要包含光源、反射鏡、遮光片 及投射透鏡。利用反射鏡將光源產生的出射光聚集到一 點’再移動投射透鏡，使投射透鏡之焦點與上述聚焦點重 合’並在透鏡焦點處放置具有特定形狀的遮光片，藉此以 投射出特別的光型，例如適用於遠光燈之集中型，或適用 於近光燈之擴散型。 然而’當採用發光二極體(Light-Emitting Diode; LED) 做為具有特定之單一光型之習知光學模組的光源時，習知 光學模組之單一光型與照度通常無法滿足法規之要求。故 當在設計汽車頭燈之遠光燈與近光燈的時候，通常係使用 多個光學模組互相搭配，將每一光學模組特定之光型疊 合，藉以滿足法規的配光標準。但是，上述使用多個光學 模組互相搭配之方式來設計汽車頭前燈，容易增加多個光 5 M391490 學模組之間配置的複雜性。 【新型内容】 因此，本創作之目的係在提供一種車用光學模組，其 中採用了拋物面反射鏡搭配聚焦光學元件來產生多樣化之 光型，可減少汽車頭燈中所使用之車用光學模組的數量。 ‘ 根據本創作之一實施例，提供一種做為車輛前方照明 之用的車用光學模組。此車用光學模組包含具有反射面及 φ 開口部之拋物面反射鏡、LED光源、鄰設於上述開口部的 聚焦光學元件、遮光片、以及投射透鏡。反射面具有至少 一拋物線曲面，此至少一拋物線曲面分別具有至少一第一 焦點，其中LED光源係實質設置在上述至少一第一焦點之 其中一者上。LED光源產生之出射光依序經過反射面及聚 焦光學元件後，其中部分之出射光係實質會聚在聚焦光學 元件的第二焦點上。此外，遮光片實質設置在上述聚焦光 學元件的第二焦點上，且設於聚焦光學元件與投射透鏡之 φ 間。 此外，根據本創作之另一實施例，上述車用光學模組 中，反射面之至少一拋物線曲面為多個拋物線曲面，其中 此些拋物線曲面分別具有多個第一焦點。 根據本創作之又一實施例，上述之車用光學模組中， 聚焦光學元件為聚焦透鏡，此聚焦透鏡具有多個曲面，而 此些曲面分別具有多個第三焦點，其中聚焦光學元件之第 二焦點實質等同於多個第三焦點的其中一者。 本創作之優點為，透過拋物面反射鏡與聚焦光學元件 6 M391490 之搭配使用’可使得汽車頭前燈中以數量較少之車用光學 模組即可達到法規之配光標準’故可降低汽車頭前燈整體 之成本，提高產品商業化後的競爭力。 【實施方式】 請參照第1圖，其係繪示根據本創作之一實施例之車 用光學模組的側面剖視示意圖。在本實施例中，車用光學 模組100主要係做為車輛前方照明之用，具體來說，可使 Φ 用單--個或多個車用光學模組100來組成汽車的頭燈， 以滿足法規之配光標準。車用光學模組100包含拋物面反 射鏡102、LED光源1〇4、聚焦光學元件106、遮光片108 及投射透鏡110。 拋物面反射鏡102具有反射面102a及開口部102b， 且其中拋物面反射鏡102之反射面102a係由至少一拋物線 曲面所形成。在本實施例中’反射面l〇2a係由拋物線曲面 102a’及拋物線曲面102a”所組成。請參照第2a圖，在其他 ^ 特定之實施例中，反射面l〇2a在如第1圖所示之垂直剖切 面上的輪廓線C1係由一拋物線方程式所決定，然而，反射 面102a在沿著車用光學模組100之光軸（水平軸X)之水平 剖切面上的輪廓線C2則由另一拋物線方程式所決定，以輪 廓線C1與輪廓線C2為基準來產生反射面l〇2a。 在第2a圖所示之實施例中，輪廓線C1實質上包含有 不同之拋物線Cla及拋物線Clb，而輪靡線C2實質上則包 含有不同之拋物線C2a、拋物線C2b及拋物線C2c。接著， 以輪廓線C1與輪廓線C2為基準，利用如電腦辅助設計相 7 M391490 關之軟體’形成具有多個平滑交接之曲面的反射面1〇2a。 請一併參照第2a及2b圖，其中第21)圖係繪示第2a 圖中區域Cl’之放大示意圖，剖面線部分係用來表示拋物 面反射鏡102的厚度。在實務上，輪廓線C1的產生，係先 產生相交（如第2b圖中虛線所示）之拋物線cia及拋物線 Clb ’為了拋物線Cla與拋物線cib之間的平滑化，在拋 物線Cla與拋物線Clb之間加入平滑曲線cic，使得拋物 線Cla與抛物線Clb之間組合部分的切線斜率可以連續， φ 而不會在輪廓線C1中產生不連續之轉折點。針對輪廓線 C2 ’其亦透過上述之方式而產生，使得拋物線C2a、拋物 線C2b與拋物線C2c三個線段之間組合部分的切線斜率可 以連續’而不會在輪廓線C2中產生不連續之轉折點。 在第1圖所示之實施例中，LED光源104係實質設置 在拋物線曲面l〇2a’的焦點（第一焦點）fl上。在其他特定實 施例中，根據車用光學模組1〇〇之光型或照度需求，LED 光源104可設置在拋物線曲面i〇2a”的焦點（第一焦點；未 隹 繪示）上。在另一實施例中，當反射面102a係由多個拋物 線曲面所組成，且其中此些拋物線曲面分別具有不同的焦 點（第一焦點）時，LED光源104則實質設置在此些拋物線 曲面之多個焦點之其中一者上。此外，在一實施例中，LED 光源104可為白光LED，例如歐司朗（OSRAM)公司所生產 之產品歐司達照明器（OSTAR Lighting)，其最亮可達900 流明（Lumen) 〇 聚焦光學元件106係鄰設於拋物面反射鏡102的開口 部102b。在本實施例中，LED光源104的出光方向實質垂 8 M391490 直於車用光學模組100之光轴，其中LED光源104之出光 方向係定義為led光源104之出光範圍之實質幾何中心。 在本實施例中，LED光源104之出光方向為平行於垂直轴 γ且向上的方向。在一實施例中，為了車用光學模組1 〇〇 的配光需求’ LED光源104的出光方向可不垂直於車用光 學模組100之光軸。在本實施例中，聚焦光學元件106為 一聚焦透鏡。 在本實施例中，遮光片108係實質設置在上述聚焦光 學元件106之聚焦透鏡的一個焦點（第二焦點）f2上’其中 遮光片108係用以遮擋到達焦點乜的部分光線’藉以呈現 出車用光學模組所需的光型。在一實施例中’遮光片 108可為弧形板體或平面板體。 至於投射透鏡110，其係設置在遮光片108之前方’ 亦即遮光片108係設於聚焦光學元件106與投射透鏡110 之間。在一實施例中，投射透鏡110為非球面透鏡。而投 射透鏡110之材質可為玻璃、壓克力或聚碳酸酷 (Polycarbonate) 〇 請再參照第1圖’ LED光源104所產生之部分出射光 之行經路徑係以具有箭號之線段來表示。在本實施例中’ LED光源104所產生之出射光之一部份首先投射至拋物面 反射鏡102之反射面l〇2a的拋物線曲面102a，，接著由拋 物線曲面102a，反射而投射至聚焦光學元件106。在經由聚 焦光學元件106聚焦後，此部分出射光則實質會聚在聚焦 光學元件106的焦點Π上。 此外，LED光源1〇4所產生之另一部份出射光係投射 9 M391490 至拋物面反射鏡102之反射面102a的拋物線曲面102a’’， 此部分之出射光經聚焦光學元件106聚焦後，並不會聚焦 光學元件106的焦點f2上。透過上述反射面102a同時具 有不同焦點之拋物線曲面l〇2a’與拋物線曲面102a”的設計 方式，可增加同一車用光學模組100中光型的多樣性，進 而使得同一車用光學模組100中可同時具有適用於遠光燈 之集中光型（強光光型），以及適用於近光燈之擴散光型。 在一實施例中，為了調整經由拋物面反射鏡102所反 射之出射光的光型或照度，藉以滿足車用光學模組100的 配光需求，其中聚焦光學元件106之聚焦透鏡可由多個曲 面所成，且每個曲面分別具有互不相同的一焦點（第三焦 點），而以上所述之遮光片108所在之焦點f2,係實質等同 於此些不同曲面之多個焦點之其中一者。在一實施例中， 聚焦光學元件106之聚焦透鏡在如第1圖所示之垂直剖切 面上的輪廓線係由多條不同之曲線所接合而成，其中每條 曲線代表一曲面。 在一實施例中，投射透鏡110更具有焦點（第四焦 點）f3,其中投射透鏡110之焦點f3係實質與聚焦光學元件 106之焦點f2重疊。 雖然本創作已以實施方式揭露如上，然其並非用以限 定本創作，任何熟習此技藝者，在不脫離本創作之精神和 範圍内，當可作各種之更動與潤飾，因此本創作之保護範 圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 M391490 為了能夠對本創作之觀點有較佳之理解，請參照上述 之詳細說明並配合相應之圖式。要強調的是，根據工業之 標準常規，附圖中之各種特徵並未依比例繪示。事實上， 為清楚說明上述實施例’可任意地放大或縮小各種特徵之 尺寸。相關圖式内容說明如下。 第1圖係繪示根據本創作之一實施例之車用光學模組 的侧面剖視示意圖。 第2a圖係繪示根據本創作之一實施例之拋物面反射 > 鏡在垂直剖切面與水平剖切面上具有不同輪廓線之示意 圖。 第2b圖係繪示第2a圖中區域C1，之放大示意圖。In the ECE regulations of the light distribution standard, the high beam and low beam have different light distribution requirements, and the high beam requires a sufficient light intensity and a wide enough illumination range, and requires high beam. The beam (maximum illumination point) is as close to the center as possible. For the high beam standard of the high beam, the ECE regulations only require the illumination of the five test points on the distribution screen. Five of the test points are on the horizontal line, and the farthest distance is only 514. Therefore, the ECE regulations stipulate The high beam light distribution standard is a concentrated flat light type. The ECE regulations for the low beam light requirements are mainly to enable the driver to see the road ahead and the right side (such as signage, line, etc.), but it does not affect the vehicle in front or the respect of the car. The human eye is also glaring even if the vehicle in front or the driver of the incoming car. Therefore, the dark area on the upper left of the light type should not be too bright, and the bright area should be in the lower right. 4 M391490 Because the projection lamp or optical module has many advantages, such as: (1) it can have a lower headlight height, so this feature can be used to design a composite luminaire that can adapt to various road conditions, and Compatible with a variety of steering mechanisms, sensors and control systems to create an active (adaptive) Headlight Lighting System (AFS), while AFS can be used to make a road trip, fork or south speed Different road lighting effects, thereby improving driving safety; (2) can produce a clearer cut-off line than the traditional headlights 'can effectively avoid the stimulation of the driver's eyes of the car to increase comfort and safety; (3) adoption The transparent lamp housing is used for protection, not for diffusing or deflecting light. Therefore, a lamp housing with a large tilt angle can be used to make the front and the lamp shape design more smooth and rich. Therefore, the projection optical mode is adopted. The group is the mainstream of current automotive lighting design. The conventional projection optical module mainly includes a light source, a mirror, a light shielding film and a projection lens. Gathering the emitted light generated by the light source to a point 'removing the projection lens, causing the focus of the projection lens to coincide with the above-mentioned focus point' and placing a light-shielding sheet having a specific shape at the focus of the lens, thereby projecting a special light pattern, for example It is suitable for the concentrated type of high beam or for the diffusion type of low beam. However, 'Light-Emitting Diode (LED) is used as a conventional optical module with a specific single light type. When the light source is used, the single light type and illumination of the conventional optical module usually cannot meet the requirements of the regulations. Therefore, when designing the high beam and low beam of the headlight of the automobile, it is usually used by a plurality of optical modules. Each optical module's specific light type is superimposed to meet the regulatory light distribution standard. However, the above-mentioned multiple optical modules are used to design the automobile headlights, which is easy to add multiple lights. 5 M391490 The complexity of the configuration between groups. [New content] Therefore, the purpose of this creation is to provide a vehicle optical module in which a parabolic mirror is used with a focusing optical element. To produce a variety of light types, the number of automotive optical modules used in automotive headlights can be reduced. According to one embodiment of the present invention, a vehicle optical module for use as a front illumination of a vehicle is provided. The vehicular optical module includes a parabolic mirror having a reflecting surface and a φ opening, an LED light source, a focusing optical element disposed adjacent to the opening, a light shielding film, and a projection lens. The reflecting surface has at least one parabolic curved surface, the at least Each of the parabolic curved surfaces has at least one first focus, wherein the LED light source is substantially disposed on one of the at least one first focus. The emitted light generated by the LED light source sequentially passes through the reflective surface and the focusing optical component, and a portion thereof The exiting light system substantially converges on the second focus of the focusing optics. Further, the light shielding sheet is substantially disposed on the second focus of the focusing optical element and is disposed between the focusing optical element and the projection lens φ. In addition, according to another embodiment of the present invention, in the vehicular optical module, at least one parabolic curved surface of the reflecting surface is a plurality of parabolic curved surfaces, wherein the parabolic curved surfaces respectively have a plurality of first focal points. According to still another embodiment of the present invention, in the vehicular optical module, the focusing optical component is a focusing lens, the focusing lens has a plurality of curved surfaces, and the curved surfaces respectively have a plurality of third focal points, wherein the focusing optical components The second focus is substantially equivalent to one of the plurality of third focuses. The advantage of this creation is that the use of a parabolic mirror in combination with the focusing optics 6 M391490 can reduce the number of automotive optical modules in the headlights of the car to meet the regulatory light distribution standard. The overall cost of the headlights increases the competitiveness of the products after commercialization. [Embodiment] Please refer to Fig. 1, which is a side cross-sectional view showing a vehicular optical module according to an embodiment of the present invention. In this embodiment, the vehicular optical module 100 is mainly used for front illumination of a vehicle. Specifically, Φ can be used to form a headlight of a car by using one or more vehicular optical modules 100. To meet the regulatory light distribution standards. The vehicular optical module 100 includes a parabolic mirror 102, an LED light source 〇4, a focusing optical element 106, a light shielding sheet 108, and a projection lens 110. The parabolic mirror 102 has a reflecting surface 102a and an opening portion 102b, and wherein the reflecting surface 102a of the parabolic mirror 102 is formed by at least one parabolic curved surface. In the present embodiment, the 'reflecting surface l〇2a is composed of a parabolic curved surface 102a' and a parabolic curved surface 102a". Referring to Fig. 2a, in other specific embodiments, the reflecting surface l〇2a is as shown in Fig. 1. The outline C1 on the vertical section shown is determined by a parabolic equation, however, the contour of the reflecting surface 102a along the horizontal plane of the optical axis (horizontal axis X) of the vehicular optical module 100 is C2 Then, determined by another parabolic equation, the reflecting surface l〇2a is generated based on the contour line C1 and the contour line C2. In the embodiment shown in Fig. 2a, the contour line C1 substantially includes a different parabola Cla and The parabola Clb, and the rim line C2 substantially contains different parabola C2a, parabola C2b and parabola C2c. Then, based on the contour line C1 and the contour line C2, using a software such as a computer aided design phase 7 M391490 A reflecting surface 1〇2a having a plurality of smoothly intersecting curved surfaces. Please refer to FIGS. 2a and 2b together, wherein FIG. 21) shows an enlarged schematic view of a region C1 in FIG. 2a, and the hatching portion is used to indicate Parabolic mirror 102 Thickness. In practice, the contour C1 is generated by the intersection of the parabola cia and the parabola Clb as shown by the dashed line in Fig. 2b. For the smoothing between the parabola Cla and the parabola cib, the parabola Cla and the parabola A smooth curve cic is added between Clb so that the tangent slope of the combined portion between the parabola Cla and the parabola Clb can be continuous, φ without generating a discontinuous turning point in the contour line C1. For the contour line C2', it also passes through the above manner. The result is that the tangent slope of the combined portion between the three line segments of the parabola C2a, the parabola C2b and the parabola C2c can be continuous without generating a discontinuous turning point in the contour C2. In the embodiment shown in FIG. The LED light source 104 is substantially disposed on the focal point (first focus) fl of the parabolic curved surface l〇2a'. In other specific embodiments, the LED light source 104 can be used according to the light type or illumination requirement of the automotive optical module 1 Set on the focus of the parabolic surface i〇2a" (first focus; not shown). In another embodiment, when the reflective surface 102a is composed of a plurality of parabolic curved surfaces, and wherein the parabolic curved surfaces respectively have different focal points (first focus), the LED light source 104 is substantially disposed on the parabolic curved surfaces. One of multiple focus points. In addition, in an embodiment, the LED light source 104 can be a white light LED, such as OSTAR Lighting, a product produced by OSRAM, which has a brightness of up to 900 lumens (Lumen) 〇 focusing optics. 106 is adjacent to the opening 102b of the parabolic mirror 102. In this embodiment, the light-emitting direction of the LED light source 104 is substantially perpendicular to the optical axis of the vehicular optical module 100. The light-emitting direction of the LED light source 104 is defined as the substantial geometric center of the light-emitting range of the LED light source 104. In the present embodiment, the light exiting direction of the LED light source 104 is parallel to the vertical axis γ and upward. In one embodiment, the light output direction of the LED light source 104 for the vehicular optical module 1 ’ may not be perpendicular to the optical axis of the vehicular optical module 100. In the present embodiment, the focusing optical element 106 is a focusing lens. In the present embodiment, the light shielding sheet 108 is substantially disposed on a focus (second focus) f2 of the focusing lens of the focusing optical element 106, wherein the light shielding sheet 108 is used to block a portion of the light reaching the focus pupil. The light type required for automotive optical modules. In one embodiment, the visor 108 can be a curved plate or a planar plate. As for the projection lens 110, it is disposed in front of the light shielding sheet 108, that is, the light shielding sheet 108 is disposed between the focusing optical element 106 and the projection lens 110. In an embodiment, the projection lens 110 is an aspherical lens. The projection lens 110 may be made of glass, acryl or polycarbonate. Please refer to Fig. 1 for a portion of the exit light generated by the LED light source 104. The path is indicated by a line segment having an arrow. In this embodiment, a portion of the emitted light generated by the LED light source 104 is first projected onto the parabolic curved surface 102a of the reflective surface 102a of the parabolic mirror 102, and then projected by the parabolic curved surface 102a to the focusing optical element. 106. Upon focusing via the focusing optical element 106, this portion of the exiting light substantially converges on the focus pupil of the focusing optics 106. In addition, another portion of the emitted light generated by the LED light source 1〇4 projects 9 M391490 to a parabolic curved surface 102a′′ of the reflective surface 102a of the parabolic mirror 102, and the emitted light of the portion is focused by the focusing optical element 106, and The focus f2 of the optical element 106 is not focused. The design of the parabolic curved surface l〇2a' and the parabolic curved surface 102a" having the different focal points through the reflective surface 102a can increase the diversity of the light patterns in the optical module 100 of the same vehicle, thereby enabling the same automotive optical module 100. There may be a concentrated light type (strong light type) suitable for a high beam, and a diffused light type suitable for a low beam. In an embodiment, in order to adjust the reflected light reflected by the parabolic mirror 102, The light type or the illuminance is used to meet the light distribution requirement of the vehicular optical module 100, wherein the focusing lens of the focusing optical element 106 can be formed by a plurality of curved surfaces, and each curved surface has a different focus (third focus). The focal point f2 of the above-mentioned light shielding sheet 108 is substantially equivalent to one of the plurality of focal points of the different curved surfaces. In an embodiment, the focusing lens of the focusing optical element 106 is as shown in FIG. The contour line shown on the vertical section is formed by joining a plurality of different curves, wherein each curve represents a curved surface. In an embodiment, the projection lens 110 has a focus. The fourth focus) f3, wherein the focus f3 of the projection lens 110 substantially overlaps the focus f2 of the focusing optics 106. Although the present disclosure has been disclosed in the above embodiments, it is not intended to limit the present invention, and anyone skilled in the art, The scope of protection of this creation shall be subject to the definition of the scope of the patent application, which is defined in the scope of the patent application, without departing from the spirit and scope of this creation. [Simplified illustration] M391490 For a better understanding of the concept of creation, please refer to the above detailed description and the corresponding drawings. It should be emphasized that according to the standard of industry, the various features in the drawings are not drawn to scale. In fact, for clarity The above embodiments can be arbitrarily enlarged or reduced in size. The related drawings are described below. Fig. 1 is a side cross-sectional view showing the optical module for a vehicle according to an embodiment of the present invention. The figure shows a parabolic reflection according to an embodiment of the present invention. The mirror has different contour lines on the vertical section and the horizontal section. Fig. 2b is an enlarged schematic view showing a region C1 in Fig. 2a.
【主要元件符號說明】 100 :車用光學模組 102 :拋物面反射鏡 102a :反射面 102a’ ：拋物線曲面 102a” ：拋物線曲面 102b :開口部 104 : LED 光源 106 :聚焦光學元件 108 :遮光片 110 :投射透鏡 C1 :輪廓線 C1 a :拋物線 Clb :拋物線 Clc :平滑曲線 C1’ ：區域 C2 :輪廓線 C2a :拋物線 C2b :拋物線 C2c :拋物線 Π :焦點 f2 :焦點 f3 :焦點 11[Description of Main Component Symbols] 100: Automotive Optical Module 102: Parabolic Mirror 102a: Reflecting Surface 102a': Parabolic Curved Surface 102a": Parabolic Curved Surface 102b: Opening 104: LED Light Source 106: Focusing Optical Element 108: Light Shield 110 : Projection lens C1 : Contour line C1 a : Parabola Clb : Parabola Clc : Smooth curve C1 ' : Area C2 : Contour line C2a : Parabola C2b : Parabola C2c : Parabola Π : Focus f2 : Focus f3 : Focus 11