201107669 六、發明說明： 【發明所屬之技術領域】 本發明涉及一種照明裝置，尤其涉及一種具有防眩光功能 的照明裝置。 【先前技術】 發光二極體(LED，Light Emitting Diode)以其亮度高、工作 電壓低、功耗小、易與積體電路匹配、驅動簡單、壽命長等優 點’從而可作為光源而廣泛應用於照明領域，具體可參見201107669 VI. Description of the Invention: [Technical Field] The present invention relates to a lighting device, and more particularly to a lighting device having an anti-glare function. [Prior Art] Light Emitting Diodes (LEDs) are widely used as light sources because of their high brightness, low operating voltage, low power consumption, easy matching with integrated circuits, simple driving, and long life. In the field of lighting, see for details.
Joseph Bielecki 等人在文獻 2007 IEEE，23rd IEEE SEMI-THERM Symposium 中的 Thermal Considerations for LED Components in an Automotive Lamp—文。 眩光(glare)作為一種光害，一般包括直接眩光和間接眩 光。直接眩光是指來自視場中高亮度或沒有充分遮蔽的眩光源 /發光物發出的光線直接對眼睛造成的刺激，眩光源發光物處 於被觀察物的同一方向或鄰近方向。間接眩光是指眩光源處於 非觀察方向產生的眩光，通常由高度光滑的表面的反射光引 起。如圖1所示，當光源於人眼1〇2上方時，自人眼1〇2 所在垂直面103偏轉45度至85度之間的範圍内，光源會對人 眼102造成直接眩光。 先刖的路燈照明裝置普遍會對駕駛者的眼睛造成直接眩 光。如圖2所示，路燈201發出的光線以其自身為中心向路面進 行投射’先前技術中可以實現路燈2〇1在車輛行駛的χ方向上 的輻射範圍大於與X方向垂直的丫方向的輕射範圍，以有效地 201107669Joseph Bielecki et al., Thermal Considerations for LED Components in an Automotive Lamp, IEEE 2007, 23rd IEEE SEMI-THERM Symposium. Glare is a light hazard that generally includes direct glare and indirect glare. Direct glare refers to the direct irritating effect of light from the glare source/illuminant from the field of view with high brightness or insufficient shading. The glare source illuminator is in the same direction or adjacent direction of the object to be observed. Indirect glare is the glare produced by a glare source in a non-observing direction, usually caused by reflected light from a highly smooth surface. As shown in Fig. 1, when the light source is above the human eye 1〇2, the light source will cause direct glare to the human eye 102 from a range of 45 degrees to 85 degrees from the vertical plane 103 where the human eye 1〇2 is located. The first-hand street lighting fixtures generally cause direct glare to the driver's eyes. As shown in FIG. 2, the light emitted by the street lamp 201 is projected toward the road surface centering on itself. In the prior art, it is possible to realize that the street lamp 2〇1 has a radiation range in the x-direction of the vehicle traveling more than the x-direction perpendicular to the X direction. Shooting range to effectively 201107669
提高路燈201的光利用率。然而，路燈201在X方向上形成的輕 射範圍係以路燈201為中心對稱分佈的，即路燈201在X方向上 向其兩側的輻射角(91與02相等，通常01= 0 2=75度，這會對 人眼產生直接眩光，在此，輻射角也可稱為半峰邊角(half-peak side angle) ’係指以垂直路面為中心向左右兩侧量測最大光強 度的一半所得的角度，也就係光源所發出的發光強度為平面上 最大發光強度的50%的光線與垂直線的夾角。在此，可參見圖 3所示路燈201的配光曲線，圖中A點對應光線的光強度為該路 燈201在〇度到90度中最大光強度的50%，B點對應光線的光強 度為該路燈201在0度到90度中的最大光強度，路燈的輕射 角0約等於70度。由此可見，先前的路燈照明裝置還是會對駕 驶者的眼睛造成直接眩光。 所以，有必要&供一種具有防眩光功能的照明褒置。 【發明内容】 下面將以實施例說明一種具有防眩光功能的照明裝置。 -種照明裝置其包括-個光_絲包括至少一個發夫 -極體以及-個光學元件，該發光元件發出的光線經過該光學 元件偏折向該光__並沿路_延伸方向出射，且經由讀 光學元件出射的光線在該光源的㈣分佈 式；-個電賴存裝置，其與該至少—贿私 i太陽能電池，其能電讀雜置紐連接，用於將太陽 光直接轉化為電能並將電能儲存在力儲存U中；一個 光封裝體’縣源及該太陽能電池包胁鱗柄震體中。 201107669 相對于先術，所述照明裝置 , 向的光分佈具有不對遍们九線/α路面延伸方 接眩會對車輛中的駕歇員造成直 像。同時，包覆於透光物中的太陽能電池將太 化為電能並將電能儲存在該電力儲存裝置中，從而 ΪΓΓ力儲純置提供電力給發技件以作為路面照明 之用’使得雜面_裝置具有節鱗保之功效。 【實施方式】The light utilization rate of the street lamp 201 is increased. However, the light-emitting range formed by the street lamp 201 in the X direction is symmetrically distributed around the street lamp 201, that is, the radiation angle of the street lamp 201 to both sides in the X direction (91 and 02 are equal, usually 01=0 2=75) Degree, which produces direct glare to the human eye. Here, the radiation angle can also be called the half-peak side angle, which means that half of the maximum light intensity is measured from the vertical road surface to the left and right sides. The angle of the light source emitted by the light source is 50% of the maximum luminous intensity on the plane and the vertical line. Here, reference can be made to the light distribution curve of the street lamp 201 shown in Fig. 3, corresponding to point A in the figure. The light intensity of the light is 50% of the maximum light intensity of the street lamp 201 in the twist to 90 degrees, and the light intensity of the B point corresponding to the light is the maximum light intensity of the street lamp 201 in the range of 0 to 90 degrees, and the light angle of the street light 0 is approximately equal to 70 degrees. It can be seen that the previous street lighting device still causes direct glare to the driver's eyes. Therefore, it is necessary to provide an illumination device with anti-glare function. Embodiments illustrate an anti-glare work Illuminating device comprising: a lighting device comprising: at least one hair-polar body and - an optical element, the light emitted by the light-emitting element being deflected by the optical element to the light__and extending along the road_ Directional emission, and the light emitted through the reading optical element is distributed in the (four) of the light source; an electric stagnation device, which is connected with the at least one bribe i solar cell, which can be electrically read and used for the sun The light is directly converted into electrical energy and stored in the force storage U; an optical package 'the county source and the solar cell is covered in the scale stalk body. 201107669 Relative to the prior art, the illumination device has a light distribution The glare of the nine-line/α road surface extension will cause a direct image to the driver in the vehicle. At the same time, the solar cell covered in the light-transmissive material will be converted into electric energy and stored in the power storage device. In the meantime, the power storage device provides power to the technical component for use as a road surface illumination, so that the device has the effect of saving the scale.
下面將結合關對本發明實施例作進—步的詳細說明。 請參閱圖4，本發明第-實施例提供的照明裝置1〇〇，其用 於對路面11進行照明，其中，路面的延伸方向為χ，該照明裝 置1〇〇包括-個光源π ’―個電力儲純置ls 一個太陽能電 池14，一個透光封裝體15。 光源12包括一個發光元件121及一個光學元件122。 發光元件121可為發光二極體，發光二極體晶片或其他發 光體。該發光元件121可為一個，也可為複數個。 光學元件122與發光元件121光學福合，即發光元件121發 出的光線直接進入光學元件122 ’並經由光學元件122的光學作 用射出。在本實施例中，光源12設置於路面11上，發光元件12ι 發出的光線向上射出至光學元件122中，光學元件122用於使發 光元件121發出的光線偏折向該光源12的側向並沿路面11的延 伸方向X出射。 光學元件122具有一縱軸1220,該光學元件122具有一個垂 201107669 直於路面11的延伸方向χ的縱軸1220路面^的延伸方向分為 +X方向和-X方向。光學元件122包括漏斗狀(hnnd shaped)頂 面1221、1222及垂直侧壁1223、1224。發光元件121設置於光 學元件122底部的幾何中心處’與頂面122i、1222相對。頂面 1221、1222為一個二次曲面，在本實施例中，該光學元件122 頂面1221、1222為一拋物線面，頂面1221的斜率小於頂面1222 的斜率’頂面1221、1222的内表面為反射面，垂直側壁1224 相對於路面11的高度高於垂直側壁1223相對於路面11的高度。 電力儲存裝置13，例如電池，與發光元件121電性連接。 電力儲存裝置13用於儲存電能’並給發光元件121提供電能。 透光封裝體15設置於路面11上，並且光源12和太陽能電池 14包覆於透光封裝體15中。在本實施例中，透光封裝體15具有 戴頂圓錐的輪廓，其具有一頂面151及環繞該頂面151的側面 152 ’該光源12位於透光封裝體15的底部，而太陽能電池14與 δ亥光源12相對地設置於透光封裝體15的頂部且鄰近於頂面 151 ’這樣有利於太陽能電池14直接吸收太陽光，提高了太陽 能電池14的吸收效率。 在本實施例中’發光元件121發出的光線主要射向頂面 1221，並且在頂面1221處發生全反射後經由垂直側壁；[223射向 透明封裝體15的側面152’並在側面152處發生折射後射向路面 11 ’並且射向路面11的光線與路面11的-X方向之間的夾角為 θ 1。發光元件121發出的光線主要射向頂面1222，並且在頂面 1222處發生全反射後經由垂直側壁1224射向透明封裝體15的 201107669 側面152 ’在側面152處發生折射後射向路面^，射向路面^ 的光線與路面11的+X方向之間的夾角為02。由於光學元件 122的垂直側壁1224相對於路面11的高度高於垂直側壁1223 的，因此，該發光元件121發出的光線經光學元件122及透光封 裝體15出射後沿著路面η在光源12的兩側的光場分佈是不對 稱的，即Θ1<02。所以，該照明裝置100發出的強光，在來車 方向（-Χ方向）不會直接射向車輛中的駕駛員的眼睛，主要射 向路面，而在去車方向（+Χ方向）’對於車輛中的駕駛員來說 能夠進一步看清楚前方路面。 在本實施例中，01、02在一預定的範圍内，例如，_15 度<Θ1<+15度、-30度<0 2<+3〇度，其中，經由發光元件121 的頂面1221反射的光線形成的配光曲線可參見圖5，而經由發 光元件121的頂面1222反射的光線形成的配光曲線可參見圖 6。優選地，_1〇度<6>1<+1〇度、_2〇度<02<+2〇度。在此，夹 角Θ1、6>2是指經由該光學元件122出射的發光強度為平面上 最大發光強度的50%的光線與路面η的夾角。 可以理解地’光源12所包括的光學元件的結構並不限於 此，還可以採用其他設計只要光學元件在結構上不對稱，以使 得光源12發出的光線與路面u之間的夾角0在一預定範圍内 且在路面兩侧的光線分佈是非對稱的，以下將舉例說明幾種具 有不同光學元件的光源。 請參閱圖7，一種光源32，其包括一發光元件321，一個與 發光元件321光學耦合的光學元件322。該光學元件322具有一 201107669 個垂直於路面11的延伸方向X的縱轴3220，路面11的延伸方向 分為+X方向和-X方向。光學元件322包括漏斗狀(funnel-shaped) 第一頂面3221、第二頂面3222，第一側面3223及與第一側面 3223相對的第二侧面3224。發光元件321設置於光學元件322 底部的幾何中心處，與第一頂面3221及第二頂面3222相對。第 一頂面3221及第二頂面3222為一個具有複數個不同斜率平面 的曲面’在本實施例中，第一頂面3221、第二頂面3222的斜率 由内向外依次變小。第一側面3223及第二側面3224為一平滑曲 面，第一側面3223相對於路面11的高度小於第二側面3224的。 從發光元件321發出的光線主要射向第一頂面3221及第二頂面 3222，在第一頂面3221、第二頂面3222發生全反射並以與縱軸 3220幾乎成90度角射出。從發光元件321發出的光線直接射向 第一側面3223及第二侧面3224的光線也會以與縱轴3220幾乎 成90度角射出。經由該光學元件322的第一側面3223出射的光 線中大部分平行於路面11的延伸方向+χ，少部分會偏離路面 11的延伸方向+X些許角度’在此，經由該光學元件322出射的 光線與路面11之間的夹角為0 1。經由該光學元件322的第二側 面3224出射的光線中大部分平行於路面n的延伸方向_χ，少部 分會偏離路面11的延伸方向_乂些許角度，在此，經由該光學元 件322出射的光線與路面u之間的夾角為02。 由於’光學元件322的第一侧面3223相對於路面11的高度 小於第二側面3224的，因此，該發光元件321發出的光線經光 學元件322及透光封裝體15出射後沿著路φ11在光源犯的兩側 的光場分佈不對稱的，發光元件321發出的光線經由光學元件 201107669 322出射後的光線與路面的夾角01<02,且Θ1、02在一預定 的範圍内，例如：-10度< 0 1<+1〇度、20度< 0 2<+20度。在此， 夾角(91、Θ2是指經由該光學元件322出射的發光強度為平面 上最大發光強度的50%的光線與路面11的夾角。另外，光學元 件322的第一頂面3221上還可設置一反射層3225，在第二頂面 3222上可設置一反射屬3226以進一步提高反射效率。 參閱圖8 ’ 一種光源42，其包括一發光元件421，一個與發 光元件421光學耦合的光學元件422。光學元件422具有一垂直 於路面的延伸方向X的縱軸4220,路面11的延伸方向分為+χ方 向和-X方向。光學元件422包括一底部4221及頂部4222。該底 部4221中央位置具有一用於收容該發光二極體421的凹陷 4223。該底部4221的外表面4224為一平滑曲面。該頂部4222 包括漏斗狀圓錐形頂面4225、4226及垂直側壁4227、垂直側壁 4228 ’頂面4225、4226的内表面為反射面。從發光二極體421 發出的光線經由凹陷4223的底面與側面進入光學元件422中， 進入底部4221的光線中的大部分會以與縱軸4220幾乎成90度 角經由外表面4224射出，而被外表面4224反射的光線會進入頂 部4222或被再次反射而經由外表面4224射出。進入頂部4222 的光線在頂面4225、4226發生全反射並以與縱軸4220幾乎成90 度角經由垂直側壁4227、4228射出。所以，經由該光學元件422 出射的光線中大部分平行於路面11的延伸方向+Χ或_χ，少部 分會偏離路面11的延伸方向些許角度，經由該光學元件422出 射的光線與路面11的延伸方向-X方向之間的夾角為<91，與路 面11的延伸方向+χ方向之間的夾角為Θ2。 201107669 由於’光學元件422的垂直侧壁4227相對於珞面11的高度 小於垂直側壁4228的高度，因此，該發光元件421發出的光線 經光學元件422及透光封裝體15出射後沿著路面η在光源42的 兩側的光場分佈不對稱的，所以發光元件421發出的光線經由 光學元件422出射後的光線與路面的夾角且01、02 在一預定的範圍内’例如：_1〇度<01<+1〇度、2〇度<θ2<+20 度。在此，夾角6>1、Θ2是指經由該光學元件422出射的發光 強度為平面上最大發光強度的50%的光線與路面11的夾角。 請參閱圖9，本發明第二實施例提供第一種光源的照明裝 置200 ’其用於對路面打進行照明’其中，路面的延伸方向為 X ’該照明裝置200與所述的第一實施例照明裝置1〇〇基本相 同’其不同之處在于光源22包括一個圓柱狀的基板221及複數 個發光元件222 ’兩個與發光元件221光學耦合的光學元件 223、224 ’所述光學元件223相對於路面η的高度小於所述光 學兀件224的。光學元件223'224，複數個發光元件222結合於 該基板221的圓周側面上，從而形成一個環狀的放射光源使發 光兀件222產生的光經由光學元件223、224後沿該光源22的侧 向方向出射。 請參閱圖10、圖11，該光學元件223、224具有一個平行於 路面11延伸方向X的中心對稱軸222〇，路面12的延伸方向分為 -X、+Χ。該光學元件223具有一個與發光元件222相對的出光 面2231。該出光面2231上具有複數個鋸齒狀微結構2232，當 然，該微結構也可為其他形狀，如梯形鋸齒狀凸起等，每個微 11 201107669 結構2232包括一個第一平面2232a以及一個連接該第—平面 • 2232a的第二平面2232b。該第一平面2232a與該第二平面2232b 所成的角度為銳角βΐ。該微結構2232可使光均勻分佈於出光 面2231上以實現光均勻化。該光學元件224具有一個與發光元 件222相對的出光面2241。該出光面2241上具有複數個鑛齒狀 微結構2242，當然，該微結構也可為其他形狀，如梯形鑛齒狀 凸起等，每個微結構2242包括一個第一平面2242a以及一個連 接該第一平面2242a的第二平面2242b。該第一平面2242a與該 鲁 第二平面2242b所成的角度為銳角2，並且，/52> /31。該微 結構2242可使光均勻分佈於出光面2241上以實現光均勻化。 本實施例中’發光元件222發出的光線主要射向光學元件 223、224的出光面2231、2241後進入透光封裝體25後在照明裝 置200的側面252處發生折射後偏向路面11延伸方向+χ、_父方 向射向路面11，並且與路面11延伸方向+X方向的夾角為01， 與路面11延伸方向-X方向的夾角為0 2。由於，光學元件223 # 的出光面2231的微結構2232的第一平面2232a與該第二平面 2232b所成的角度冷1小於光學元件224的出光面2241的微結構 2242的第一平面2242a與該第二平面2242b所成的角度召2，所 以，光學元件223的出光面2231的微結構2232的第一平面2232a 的傾斜度大於光學元件224的出光面2241的微結構2242的第一 平面2242a的傾斜度’故’經由光學元件223出射於路面11的光 線的彙聚好於經由光學元件224出射於路面11的光線的彙聚， 因此，該發光元件222發出的光線經光學元件223及透光封裝體 25出射後沿著路面11在光源22的兩側的光場分佈是不對稱 12 201107669 的，即(91<02。所以，照明裝置200發出的強光，在來車方向 (-X方向）不會直接射向車輛中的駕驶員的眼睛，主要射向路 面，而在去車方向（+X方向），對於車輛中的駕敌員來說能夠 進一步看清楚前方路面。 在本實施例中，01、02在一預定的範圍内，例如，_1〇 度< Θ 1<+10度、-20度< 0 2<+20度。在此，夾角01、g 2是指 經由該光學元件223、224出射的發光強度為平面上最大發光強 度的50%的光線與路面11的夾角。 可以理解地’本實施例中的光源結構不限於此，下面舉例 說明不同於本實施例的光源結構。 請參閱圖12 ’ 一個光源52 ’用於對路面11進行照明，其中， 路面11的延伸方向為X，其包括一個圓柱狀的基板521及至少 一個發光元件522，一個與發光元件522光學麵合的光學元件 523，§亥圓柱狀的基板521具一個垂直於路面的中心對稱軸 5210及第一側面5211及與第一側面5211以中心對稱軸5210對 稱的第二側面5212 ’該第二側面5212延伸方向為路面Π的+χ 延伸方向。該至少一個發光元件522，光學元件523結合於該基 板521的第二侧面上從而形成一個半環狀的放射光源使發光元 件522產生的光經由光學元件523沿該光源52側向方向出射。 該光學元件523具有一個平行於路面11的延伸方向X的中 心對稱軸5230 ’路面11的延伸方向分為·χ、+χ。該光學元件 523具有一個與發光元件522相對的出光面5231，該出光面5231 上具有複數個鋸齒狀微結構5232，當然，該微結構也可為其他 13 201107669 形狀’如梯形鋸齒狀凸起等。該微結構5232可使光均勻分佈於 出光面5231上且產生光均勻化的效果。發光元件522發出的光 線主要射向光學元件523的出光面5231後進入透明封裝體25在 照明裝置200的側面252處發生折射後偏向路面延伸方向+χ方 向射向路面’並且與路面延伸方向+χ方向的夾角為Θ，且0 在一預定的範圍内’例如，_2〇度<0<+2〇度。在此，夾角0是 指經由該光學元件523出射的發光強度為平面上最大發光強度 的50%的光線與路面η的夾角。由於，發光元件522結合於基 板521的第二侧面5212上，並且第二側面5212延伸方向為路面 11的+Χ延伸方向。所以，由光源52的發出的光線經光學元件 523出射後只在路面11的+χ延伸方向形成光場。 由於經光源52的發出的光線經光學元件523出射後只在路 面11的+Χ延伸方向形成光場，而在路面^的—乂延伸方向無光 場形成，因此，在來車方向（-Χ方向）上就不會對車輛中的駕 駛員造成直接的眩光影響。 請參閱圖13, 一個光源62,用於對路面打進行照明，其中， 路面11的橫向延伸方向為X，縱向延伸方向為¥，其包括一個 圓柱狀的基板621 ’至少一個發光元件622, 一個光學元件623、 一個光學元件624。 該圓柱狀的基板621具有-圓周側面6211，言亥圓周側面 6211具有一個幾何對稱_心點〇。 發光元件622結合於該基板621的圓周側面6211上，從而形 成一個環狀的放射光源。 / 201107669 該光學元件623、624與發光元件622光學耦合並且設置於 發光元件622的兩側。該光學元件623、624以該圓柱狀基板621 的幾何對稱中心Ο為對稱點設置於該圓柱狀基板621的側面 6211上。該光學元件623、624分別具有一個内表面6231、6241， 且内表面6231、6241為反射面，該反射面為圓滑的凸曲面，當 然’該反射面也可為平面。A detailed description of the steps of the present invention will be made below in conjunction with the following. Referring to FIG. 4, a lighting device 1A according to a first embodiment of the present invention is used for illuminating a road surface 11, wherein the road surface extends in a direction of χ, and the lighting device 1 includes a light source π ' One power storage is purely ls a solar cell 14, a light transmissive package 15. Light source 12 includes a light emitting element 121 and an optical element 122. The light-emitting element 121 can be a light-emitting diode, a light-emitting diode wafer or other light-emitting body. The light-emitting elements 121 may be one or plural. The optical element 122 is optically compliant with the illuminating element 121, i.e., the light emitted by the illuminating element 121 directly enters the optical element 122' and exits through the optical action of the optical element 122. In this embodiment, the light source 12 is disposed on the road surface 11, and the light emitted by the light-emitting element 12 is emitted upward into the optical element 122. The optical element 122 is used to deflect the light emitted by the light-emitting element 121 toward the lateral direction of the light source 12. It exits along the extending direction X of the road surface 11. The optical element 122 has a longitudinal axis 1220 having a vertical axis 1220 that extends perpendicular to the direction of extension of the road surface 11. The direction of extension of the road surface is divided into +X direction and -X direction. Optical element 122 includes hnnd shaped top surfaces 1221, 1222 and vertical side walls 1223, 1224. The light-emitting element 121 is disposed at the geometric center of the bottom of the optical element 122 opposite the top surfaces 122i, 1222. The top surface 1221, 1222 is a quadric surface. In this embodiment, the top surface 1221, 1222 of the optical element 122 is a parabolic surface, and the slope of the top surface 1221 is smaller than the slope of the top surface 1222 'inside the top surface 1221, 1222. The surface is a reflective surface, and the height of the vertical side wall 1224 relative to the road surface 11 is higher than the height of the vertical side wall 1223 relative to the road surface 11. The power storage device 13, such as a battery, is electrically connected to the light-emitting element 121. The power storage device 13 is for storing electric energy 'and supplying electric energy to the light-emitting element 121. The light transmissive package 15 is disposed on the road surface 11, and the light source 12 and the solar cell 14 are covered in the light transmissive package 15. In the present embodiment, the light transmissive package 15 has a contour of a top cone having a top surface 151 and a side surface 152 surrounding the top surface 151. The light source 12 is located at the bottom of the light transmissive package 15, and the solar cell 14 The solar cell 14 directly absorbs sunlight, and the absorption efficiency of the solar cell 14 is improved, which is disposed on the top of the transparent package 15 and adjacent to the top surface 151 ′. In the present embodiment, the light emitted by the light-emitting element 121 is mainly directed toward the top surface 1221, and is totally reflected at the top surface 1221 via the vertical sidewall; [223 is directed toward the side 152' of the transparent package 15 and at the side 152 The angle between the ray which is refracted and which is incident on the road surface 11' and which is incident on the road surface 11 and the -X direction of the road surface 11 is θ1. The light emitted by the light-emitting element 121 is mainly directed toward the top surface 1222, and is totally reflected at the top surface 1222, and then is incident on the side surface 152 of the transparent package 15 via the vertical sidewall 1224. The angle between the light hitting the road surface ^ and the +X direction of the road surface 11 is 02. Since the height of the vertical side wall 1224 of the optical element 122 relative to the road surface 11 is higher than that of the vertical side wall 1223, the light emitted by the light-emitting element 121 is emitted through the optical element 122 and the light-transmitting package 15 and then along the road surface η at the light source 12. The distribution of the light fields on both sides is asymmetrical, ie Θ1 < 02. Therefore, the glare emitted by the illuminating device 100 does not directly hit the driver's eyes in the vehicle direction (-Χ direction), mainly toward the road surface, and in the direction of departure (+Χ direction) The driver in the vehicle can further see the road ahead. In the present embodiment, 01, 02 is within a predetermined range, for example, _15 degrees < Θ 1 < +15 degrees, -30 degrees < 0 2 < +3 degrees, wherein the top surface of the light-emitting element 121 is passed The light distribution curve formed by the reflected light of 1221 can be seen in FIG. 5, and the light distribution curve formed by the light reflected by the top surface 1222 of the light-emitting element 121 can be seen in FIG. Preferably, _1 &<6>1<+1 latitude, _2 latitude <02<+2 latitude. Here, the angles Θ1, 6>2 refer to the angle between the light emitted by the optical element 122 and having a luminous intensity of 50% of the maximum luminous intensity on the plane and the road surface η. It can be understood that the structure of the optical element included in the light source 12 is not limited thereto, and other designs may be adopted as long as the optical element is structurally asymmetrical so that the angle between the light emitted by the light source 12 and the road surface u is predetermined. The distribution of light within the range and on both sides of the road surface is asymmetrical, and several light sources having different optical elements will be exemplified below. Referring to Fig. 7, a light source 32 includes a light emitting element 321 and an optical element 322 optically coupled to the light emitting element 321 . The optical element 322 has a longitudinal axis 3220 of 201107669 perpendicular to the direction X of extension of the road surface 11, and the direction of extension of the road surface 11 is divided into a +X direction and a -X direction. The optical element 322 includes a funnel-shaped first top surface 3221, a second top surface 3222, a first side 3223, and a second side 3224 opposite the first side 3223. The light-emitting element 321 is disposed at a geometric center of the bottom of the optical element 322 opposite to the first top surface 3221 and the second top surface 3222. The first top surface 3221 and the second top surface 3222 are a curved surface having a plurality of different slope planes. In the present embodiment, the slopes of the first top surface 3221 and the second top surface 3222 are sequentially reduced from the inside to the outside. The first side 3223 and the second side 3224 are a smooth curved surface, and the height of the first side 3223 relative to the road surface 11 is smaller than that of the second side 3224. The light emitted from the light-emitting element 321 is mainly directed toward the first top surface 3221 and the second top surface 3222, and is totally reflected at the first top surface 3221 and the second top surface 3222 and is emitted at an angle of almost 90 degrees to the vertical axis 3220. Light rays that are emitted from the light-emitting element 321 directly toward the first side surface 3223 and the second side surface 3224 are also emitted at an angle of almost 90 degrees to the longitudinal axis 3220. Most of the light rays exiting through the first side surface 3223 of the optical element 322 are parallel to the direction of extension of the road surface 11 + χ, and a small portion will deviate from the direction of extension of the road surface 11 + X a slight angle 'here, via the optical element 322 The angle between the light and the road surface 11 is 0 1 . Most of the light rays emitted through the second side surface 3224 of the optical element 322 are parallel to the extending direction _χ of the road surface n, and a small portion deviates from the extending direction of the road surface 11 by a slight angle, where it is emitted via the optical element 322. The angle between the light and the road surface u is 02. Since the height of the first side surface 3223 of the optical element 322 relative to the road surface 11 is smaller than that of the second side surface 3224, the light emitted by the light-emitting element 321 is emitted through the optical element 322 and the light-transmitting package 15 and then along the path φ11 at the light source. The light field distribution on both sides of the sin is asymmetric, and the light emitted by the illuminating element 321 passes through the optical element 201107669 322 and the angle between the light and the road surface is 01 < 02, and Θ1, 02 are within a predetermined range, for example: -10 Degree < 0 1 < +1 〇, 20 degrees < 0 2 < + 20 degrees. Here, the angle (91, Θ2 refers to the angle between the light emitted by the optical element 322 and the light intensity of 50% of the maximum luminous intensity on the plane and the road surface 11. In addition, the first top surface 3221 of the optical element 322 can also be A reflective layer 3225 is provided, and a reflective genus 3226 can be disposed on the second top surface 3222 to further improve the reflection efficiency. Referring to FIG. 8A, a light source 42 includes a light-emitting element 421 and an optical element optically coupled to the light-emitting element 421. 422. The optical element 422 has a longitudinal axis 4220 perpendicular to the extending direction X of the road surface, and the extending direction of the road surface 11 is divided into a +χ direction and a -X direction. The optical element 422 includes a bottom portion 4221 and a top portion 4222. The bottom portion 4221 is located at the center. There is a recess 4223 for receiving the light-emitting diode 421. The outer surface 4224 of the bottom portion 4221 is a smooth curved surface. The top portion 4222 includes a funnel-shaped conical top surface 4225, 4226 and a vertical side wall 4227, and a vertical side wall 4228' The inner surface of the surface 4225, 4226 is a reflecting surface. The light emitted from the light emitting diode 421 enters the optical element 422 through the bottom surface and the side surface of the recess 4223, and enters the light of the bottom portion 4221. Most of it will exit through the outer surface 4224 at an angle of almost 90 degrees to the longitudinal axis 4220, while light reflected by the outer surface 4224 will enter the top 4222 or be reflected again through the outer surface 4224. The light entering the top 4222 is at the top The faces 4225, 4226 are totally reflected and exit through the vertical sidewalls 4227, 4228 at an angle of substantially 90 degrees to the longitudinal axis 4220. Therefore, most of the light rays exiting through the optical element 422 are parallel to the direction of extension of the road surface 11 + or _ χ, a small portion will deviate from the extending direction of the road surface 11 by a slight angle, and the angle between the light emitted through the optical element 422 and the direction of extension of the road surface 11 - X direction is < 91, and the direction of extension of the road surface 11 + χ direction The angle between the two is Θ 2. 201107669 Since the height of the vertical side wall 4227 of the optical element 422 relative to the top surface 11 is smaller than the height of the vertical side wall 4228, the light emitted by the light-emitting element 421 passes through the optical element 422 and the light-transmitting package 15 After the exit, the light field distribution on both sides of the light source 42 along the road surface η is asymmetric, so that the light emitted from the light-emitting element 421 is emitted through the optical element 422 and the road surface. The angles 01 and 02 are within a predetermined range 'for example: _1 & degrees < 01 < +1 〇 degrees, 2 & degrees < θ2 < + 20 degrees. Here, the angles 6 > 1, Θ 2 means The luminous intensity emitted by the optical element 422 is the angle between the light of 50% of the maximum luminous intensity on the plane and the road surface 11. Referring to Figure 9, a second embodiment of the present invention provides a lighting device 200 of a first type of light source for use on a road surface. The illumination is performed, wherein the direction of the road surface is X'. The illumination device 200 is substantially the same as the illumination device 1 of the first embodiment. The difference is that the light source 22 includes a cylindrical substrate 221 and a plurality of Light-emitting element 222 'two optical elements 223, 224 that are optically coupled to light-emitting element 221 'The height of said optical element 223 relative to the road surface η is smaller than that of the optical element 224. The optical element 223'224 has a plurality of light emitting elements 222 bonded to the circumferential side surface of the substrate 221, thereby forming an annular radiation source for causing the light generated by the light emitting element 222 to pass along the side of the light source 22 via the optical elements 223, 224. Exit in the direction. Referring to Figures 10 and 11, the optical elements 223, 224 have a central axis of symmetry 222A parallel to the direction X of the road surface 11. The direction of extension of the road surface 12 is divided into -X, +Χ. The optical element 223 has a light exit surface 2231 opposite to the light emitting element 222. The illuminating surface 2231 has a plurality of zigzag microstructures 2232. Of course, the microstructures may also have other shapes, such as trapezoidal zigzag protrusions, etc. Each micro 11 201107669 structure 2232 includes a first plane 2232a and a connection. The first plane 2232b of the second plane 2232a. The angle formed by the first plane 2232a and the second plane 2232b is an acute angle βΐ. The microstructure 2232 allows light to be evenly distributed over the light exit surface 2231 to achieve light homogenization. The optical element 224 has a light exit surface 2241 opposite the light emitting element 222. The light-emitting surface 2241 has a plurality of ore-like microstructures 2242 thereon. Of course, the microstructures may also have other shapes, such as trapezoidal ore-like protrusions. Each of the microstructures 2242 includes a first plane 2242a and a connection. A second plane 2242b of the first plane 2242a. The angle formed by the first plane 2242a and the second plane 2242b is an acute angle of 2, and /52> /31. The microstructure 2242 allows light to be evenly distributed on the light exit surface 2241 to achieve light uniformization. In the present embodiment, the light emitted by the light-emitting element 222 is mainly incident on the light-emitting surfaces 2231 and 2241 of the optical elements 223 and 224, and then enters the light-transmitting package 25, and is refracted at the side surface 252 of the illumination device 200, and then deflected toward the road surface 11 in the direction of the road surface 11 The 父, _ parent direction is directed toward the road surface 11 and is at an angle of 01 to the direction of extension of the road surface 11 + X direction, and the angle of the direction of the road surface 11 extending in the -X direction is 0 2 . Because the angle formed by the first plane 2232a of the microstructure 2232 of the light-emitting surface 2231 of the optical element 223 # and the second plane 2232b is smaller than the first plane 2242a of the microstructure 2242 of the light-emitting surface 2241 of the optical element 224 and the The angle formed by the second plane 2242b is 2, so that the inclination of the first plane 2232a of the microstructure 2232 of the light exit surface 2231 of the optical element 223 is greater than the first plane 2242a of the microstructure 2242 of the light exit surface 2241 of the optical element 224. The convergence of the light emitted from the optical element 223 on the road surface 11 is better than the convergence of the light emitted through the optical element 224 on the road surface 11. Therefore, the light emitted from the light-emitting element 222 passes through the optical element 223 and the light-transmitting package. After 25 exits, the distribution of the light field along the road surface 11 on both sides of the light source 22 is asymmetrical 12 201107669, that is, (91 < 02. Therefore, the glare emitted by the illumination device 200 is not in the direction of the incoming vehicle (-X direction). The driver's eyes will be directed at the vehicle, mainly to the road, and in the direction of the vehicle (+X direction), the driver in the vehicle can further see the road ahead. 01, 02 is within a predetermined range, for example, _1 & degrees < Θ 1 < +10 degrees, -20 degrees < 0 2 < +20 degrees. Here, the angles 01, g 2 refer to The light-emitting intensity of the optical elements 223, 224 is 50% of the maximum luminous intensity on the plane and the angle of the road surface 11. It is understood that the light source structure in this embodiment is not limited thereto, and the following is different from the embodiment. Referring to FIG. 12, a 'light source 52' is used to illuminate the road surface 11. The road surface 11 extends in the direction of X, and includes a cylindrical substrate 521 and at least one light-emitting element 522, one and the light-emitting element 522. The optically-transparent optical element 523 has a central axis of symmetry 5210 perpendicular to the road surface and a first side 5211 and a second side 5212 that is symmetric with the first side 5211 with a central axis of symmetry 5210. The two side faces 5212 extend in the direction of the +χ extension of the road surface. The at least one light-emitting element 522, the optical element 523 is coupled to the second side of the substrate 521 to form a semi-annular radiation source such that the light-emitting element 522 The generated light is emitted in the lateral direction of the light source 52 via the optical element 523. The optical element 523 has a central symmetry axis 5230 which is parallel to the extending direction X of the road surface 11 and the direction in which the road surface 11 extends is divided into χ, +χ. The optical element 523 has a light-emitting surface 5231 opposite to the light-emitting element 522. The light-emitting surface 5231 has a plurality of saw-toothed microstructures 5232. Of course, the microstructure may be other 13 201107669 shapes such as trapezoidal zigzag protrusions. The microstructures 5232 allow light to be evenly distributed over the light exit surface 5231 and produce an effect of light homogenization. The light emitted by the light-emitting element 522 is mainly incident on the light-emitting surface 5231 of the optical element 523, and then enters the transparent package 25 to be refracted at the side surface 252 of the illumination device 200, and then deflects toward the road surface in the direction of the road surface extension + χ direction toward the road surface and extends in the direction of the road surface + The angle of the χ direction is Θ, and 0 is within a predetermined range 'for example, _2 & degrees < 0 < + 2 〇 degrees. Here, the angle 0 means an angle between the light emitted through the optical element 523 and having a luminous intensity of 50% of the maximum luminous intensity on the plane and the road surface η. Since the light emitting element 522 is bonded to the second side surface 5212 of the substrate 521, and the second side surface 5212 extends in the +Χ extending direction of the road surface 11. Therefore, the light emitted from the light source 52 exits through the optical element 523 and forms a light field only in the +χ direction of the road surface 11. Since the light emitted from the light source 52 is emitted through the optical element 523, the light field is formed only in the +Χ extension direction of the road surface 11, and the light field is formed in the direction of the road surface extension, so in the direction of the vehicle (-Χ In the direction) there is no direct glare effect on the driver in the vehicle. Referring to FIG. 13, a light source 62 for illuminating the road surface, wherein the road surface 11 has a lateral extension direction of X and a longitudinal extension direction of ¥, which includes a cylindrical substrate 621 'at least one light-emitting element 622, one Optical element 623, an optical element 624. The cylindrical substrate 621 has a circumferential side surface 6211, and the circumferential side surface 6211 has a geometric symmetry _ heart point 〇. The light-emitting element 622 is bonded to the circumferential side surface 6211 of the substrate 621 to form an annular radiation source. / 201107669 The optical elements 623, 624 are optically coupled to the light-emitting elements 622 and disposed on both sides of the light-emitting elements 622. The optical elements 623 and 624 are disposed on the side surface 6211 of the cylindrical substrate 621 with the geometric center of symmetry of the cylindrical substrate 621 being symmetric. The optical elements 623, 624 have an inner surface 6231, 6241, respectively, and the inner surface 6231, 6241 is a reflective surface, which is a smooth convex curved surface, of course, the reflective surface can also be a flat surface.
發光元件622發出的光線主要射向光學元件623、624，並 且在光學元件623、6M的内表面6231、6241處發生反射使光線 主要朝發光讀6Π側丨射，即發光元件622丨射的光線經 光學元件623、624後出射向路面^的延伸方向+χ、_χ方向， 並且路面11上攸場分佈關柱狀基板621的幾何觸中心〇 為中心對稱點對稱分佈’即在路面⑽水平面χ〇γ内光場的分 佈面積與在麻11的水平φ_Χαγ内光場的料面積相等而 在路面11的延伸方向·χ、+χ上光場的分佈是獨稱的。 因此’圖钟所述的照明裝置2〇〇設置於相對方向的車道之 間的分隔縣上時’從該㈣錢2⑻發㈣粉佈在來車方 向即在路面11的水平面ΧΟΥ、·χ〇·γ内 。 八不會對車輛中的駕駛 貝產生直接的眩光影響。 。以理解地，對於本領域的普通技術人員來說，可以根據 本發明的技術構思做出其他各種相應的改變與變形， 些改變與變形都應屬於本發利要求的保護_。〜 【圖式簡單說明】 圖1係先前技術中產生眩光的原理示意圖 15 201107669 圖2係一種現有路燈對路面進行照射的狀態示意圖。 圖3係一種現有路燈的配光曲線圖。 圖4係本發明第一實施例提供的具有第一種光學元件照明裝 置的剖面示意圖。 圖5係圖4中照明裝置的配光曲線圖。 圖6係圖4中照明裝置的配光曲線圖。 圖7係本發明第一實施例提供的照明裝置中第二種光學元件 的剖面示意圖。 圖8係本發明第一實施例提供的照明裝置中第三種光學元件 的剖面示意圖。 圖9係本發明第二實施例提供的具有第一種光源的照明裝置 的剖面示意圖。 圖10係圖9中光學元件的示意圖。 圖11係圖9中光學元件的示意圖。 圖12係本發明第二實施例提供的照明裝置中第二種光源的剖 面示意圖。 — 圖13係本發明第二實施例提供的照明裝置中第三種光源的剖 面示意圖。 【主要元件符號說明】 照明裝置 100、200 16 201107669 路面 11 光源 12、 22、 32、 42、 52、 62 電力儲存裝置 13 太陽能電池 14 透光封裝體 15 發光元件 121、 222、 321、 421、 522、 622、 光學元件 122、 223、 224、 322、 422、 523、 623、 624 基板 221、 521、 621 縱轴 1220、 3220、 4220 中心對稱轴 2220、 5210 頂面 1221、 1222、 3221、 3222 4225> 4226 側壁 1223、 1224、 4227、 4228 側面 3223、 3224 、 5211、 5212 底部 4221 頂部 4222 凹陷 4223 出光面 2231、2241、5231 鋸齒狀微結構 2232、 5232 第一平面 2232a, 2242 a 第二平面 2232b、2242 b 17 201107669 圓周側面 内表面 幾何對稱中心 水平面 路面延伸方向 夾角 6211 6231 、 6241 ΟThe light emitted by the light-emitting element 622 is mainly directed toward the optical elements 623, 624, and is reflected at the inner surfaces 6231, 6241 of the optical elements 623, 6M so that the light is mainly emitted toward the side of the light-emitting reading, that is, the light emitted by the light-emitting element 622. After passing through the optical elements 623 and 624, the direction of the road surface is extended to the direction of the road surface, and the direction of the road surface is χ, _χ, and the geometrical center of the columnar substrate 621 on the road surface 11 is symmetrically distributed symmetrically at the center of the road surface (10). The distribution area of the gamma ray internal light field is equal to the material area of the light field in the horizontal φ_Χαγ of the hemp 11 and the distribution of the light field in the direction of extension of the road surface 11 χ, +χ is unique. Therefore, when the illuminating device 2 described in Fig. 2 is placed in the divided county between the lanes in the opposite direction, 'from the (four) money 2 (8) hair (four) powder cloth in the direction of the coming vehicle, that is, in the horizontal plane of the road surface ΧΟΥ, χ〇 · Within γ. Eight will not have a direct glare effect on the driving car in the vehicle. . It will be understood by those skilled in the art that various other changes and modifications can be made in accordance with the technical concept of the present invention. ~ [Simple description of the drawing] Fig. 1 is a schematic diagram of the principle of generating glare in the prior art. 15 201107669 Fig. 2 is a schematic view showing a state in which the existing street lamp illuminates the road surface. Figure 3 is a light distribution graph of a conventional street lamp. Fig. 4 is a cross-sectional view showing a first optical element illumination device according to a first embodiment of the present invention. FIG. 5 is a light distribution graph of the lighting device of FIG. 4. FIG. Figure 6 is a light distribution diagram of the lighting device of Figure 4. Figure 7 is a cross-sectional view showing a second optical element in the illumination device according to the first embodiment of the present invention. Fig. 8 is a cross-sectional view showing a third optical element in the illumination device according to the first embodiment of the present invention. Figure 9 is a cross-sectional view showing a lighting device having a first light source according to a second embodiment of the present invention. Figure 10 is a schematic illustration of the optical components of Figure 9. Figure 11 is a schematic illustration of the optical components of Figure 9. Figure 12 is a cross-sectional view showing a second light source in the illumination device according to the second embodiment of the present invention. - Figure 13 is a cross-sectional view showing a third light source in the illumination device of the second embodiment of the present invention. [Description of main component symbols] Illumination device 100, 200 16 201107669 Pavement 11 Light source 12, 22, 32, 42, 52, 62 Power storage device 13 Solar cell 14 Light-transmissive package 15 Light-emitting elements 121, 222, 321, 421, 522 622, optical elements 122, 223, 224, 322, 422, 523, 623, 624 substrate 221, 521, 621 vertical axis 1220, 3220, 4220 central axis of symmetry 2220, 5210 top surface 1221, 1222, 3221, 3222 4225 > 4226 Sidewalls 1223, 1224, 4227, 4228 Sides 3223, 3224, 5211, 5212 Bottom 4221 Top 4222 Recess 4223 Light exit surface 2231, 2241, 5231 Jagged microstructure 2322, 5232 First plane 2232a, 2242 a Second plane 2232b, 2242 b 17 201107669 The geometrical symmetry of the inner surface of the circumferential side is at the angle of the extending direction of the horizontal plane. 6211 6231 , 6241 Ο
XOY、-XO-Y -X、+X θ、Θ1、Θ2、βΐ、β2XOY, -XO-Y -X, +X θ, Θ1, Θ2, βΐ, β2
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