TWI645217B - Light guiding lens - Google Patents
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Abstract
一種導光透鏡,供一電子看板的一發光元件所產生的光線通過。該導光透鏡具有一供該光線入射的入光面部、一相反於該入光面部且供該光線射出的出光面部、一形成於該入光面部的菲涅爾透鏡結構、及多個彼此由上而下橫向延伸地併列在該出光面部的條狀稜鏡部,每一條狀稜鏡部具有一遠離該入光面部地向下延伸的傾斜折射面。在該光線經由該入光面部進入該導光透鏡且經由該出光面部射出該導光透鏡的狀態下,該光線的方向於菲涅爾透鏡結構折射成朝向該出光面部的平行光束,以致於該光線在該等傾斜折射面折射後向下傾斜。A light guiding lens for passing light generated by a light emitting element of an electronic board. The light guiding lens has a light incident surface for the light incident, a light emitting surface opposite to the light incident surface for emitting the light, a Fresnel lens structure formed on the light incident surface, and a plurality of The strip-shaped crotch portion of the light-emitting surface portion is laterally extended from the top to the bottom, and each of the strip-shaped crotch portions has an inclined refractive surface extending downward from the light-incident surface portion. In a state where the light enters the light guiding lens through the light incident surface and the light guiding lens is emitted through the light emitting surface, the direction of the light is refracted into a parallel light beam toward the light emitting surface by the Fresnel lens structure, so that the light The light is slanted downward after being refracted by the inclined refracting surfaces.
Description
本發明是有關於一種導光透鏡,特別是指一種用於電子看板的導光透鏡。The present invention relates to a light guiding lens, and more particularly to a light guiding lens for an electronic kanban.
參閱圖1,現有的用於道路的電子看板9具有由多個發光模組(圖未示)所構成的棋盤式陣列,並透過使特定位置的發光模組發光,使該電子看板9投射出構成特定圖號或文字的光線以供行人91觀看的,達到宣傳的目的。Referring to FIG. 1, a conventional electronic kanban 9 for a road has a checkerboard array formed by a plurality of light-emitting modules (not shown), and the electronic kanban 9 is projected by illuminating a specific position of the light-emitting module. The light that constitutes a particular figure or text is for viewing by the pedestrian 91 for promotional purposes.
該類電子看板9大多設置在高處,而不易被遮蔽,然而,在此情況下,觀看該電子看板9的行人91處於低於該電子看板9的位置,且自該電子看板9投射出的光線是向四面八方投射,僅有向下的部分被行人看見,而有能源使用效率不佳之缺點且電子看板9顯示的文字或圖號不易被辨識。Such an electronic kanban 9 is mostly placed at a high place and is not easily shielded. However, in this case, the pedestrian 91 viewing the electronic kanban 9 is at a position lower than the electronic kanban 9 and projected from the electronic kanban 9. The light is projected in all directions, only the downward part is seen by the pedestrian, and there is a disadvantage of poor energy use efficiency and the text or figure displayed by the electronic signboard 9 is not easily recognized.
此外,當陽光照射到電子看板9所產生的反光會干擾行人91,使得電子看板9顯示的文字或圖號更不易被辨識。In addition, the reflection caused by sunlight shining onto the electronic board 9 interferes with the pedestrian 91, making the text or figure displayed by the electronic board 9 less recognizable.
因此,現有的電子看板9仍有改良的空間。Therefore, the existing electronic signboard 9 still has room for improvement.
因此,本發明之其中一目的,即在提供一種電子看板的導光透鏡,供設置在電子看板上且供一發光模組所產生的光源通過,而能克服上述習知技術的缺陷。Accordingly, it is an object of the present invention to provide a light guide lens for an electronic sign for use in an electronic signage and for the passage of a light source generated by a light emitting module to overcome the deficiencies of the prior art.
因此,本發明之一目的即在提供一種導光透鏡,供該電子看板的一發光元件所產生的光線通過。該導光透鏡包含一導光透鏡,該導光透鏡具有一供該光線入射的入光面部、一相反於該入光面部且供該光線射出的出光面部、一形成於該入光面部的菲涅爾透鏡結構、及多個彼此由上而下橫向延伸地併列在該出光面部的條狀稜鏡部,每一條狀稜鏡部具有一遠離該入光面部地向下延伸的傾斜折射面。在該光線經由該入光面部進入該導光透鏡且經由該出光面部射出該導光透鏡的狀態下,該光線的方向於菲涅爾透鏡結構折射成朝向該出光面部的平行光束,以致於該光線在該等傾斜折射面折射後向下傾斜。Accordingly, it is an object of the present invention to provide a light guiding lens through which light generated by a light emitting element of the electronic signage passes. The light guiding lens comprises a light guiding lens having a light incident surface for the light incident, a light emitting surface opposite to the light incident surface and emitting the light, and a phenanthrene formed on the light incident surface And a plurality of strip-shaped crotch portions juxtaposed on the light-emitting surface portion extending from top to bottom and extending laterally from each other, each of the strip-shaped crotch portions having an inclined refractive surface extending downward from the light-incident surface portion. In a state where the light enters the light guiding lens through the light incident surface and the light guiding lens is emitted through the light emitting surface, the direction of the light is refracted into a parallel light beam toward the light emitting surface by the Fresnel lens structure, so that the light The light is slanted downward after being refracted by the inclined refracting surfaces.
在一些實施態樣中,該入光面部朝該出光面部凹陷並形成一用以收容該發光元件的收容槽,該菲涅爾透鏡結構是位於該收容槽的槽底。In some embodiments, the light-incident surface is recessed toward the light-emitting surface portion to form a receiving groove for receiving the light-emitting element, and the Fresnel lens structure is located at the bottom of the receiving groove.
在一些實施態樣中,每一傾斜折射面與水平面具有一夾角,該夾角介於40°至85°之間。In some embodiments, each of the oblique refractive surfaces has an angle with the horizontal mask, the included angle being between 40° and 85°.
在一些實施態樣中,該等傾斜折射面分別與水平面的該等夾角並非彼此相同,且使得該光線通過該等傾斜折射面後向下傾斜的部分的光路相對於一通過該發光元件的水平面的夾角是介於向上5度至向下35度之間。In some embodiments, the angles of the inclined refracting surfaces and the horizontal plane are not identical to each other, and the optical path of the portion of the ray that passes downward through the inclined refracting surface is opposite to a horizontal plane passing through the illuminating element. The angle is between 5 degrees up to 35 degrees down.
本發明至少具有以下功效:該發光元件所發出的光線於菲涅爾透鏡結構折射成朝向該出光面部的平行光束,以致於該光線在該等傾斜折射面折射後向下傾斜,如此,自該電子看板投射出的光線能被導向為主要是向前地往下投射,大部分皆能被行人看見,而能有效利用能源且使得電子看板顯示的文字或圖號容易被辨識。The present invention has at least the following effects: the light emitted by the light-emitting element is refracted by the Fresnel lens structure into a parallel light beam toward the light-emitting surface portion, so that the light is tilted downward after being refracted by the inclined refractive surfaces, thus, The light projected by the electronic kanban can be directed to project mainly downwards, most of which can be seen by pedestrians, and can effectively utilize energy and make the text or figure displayed on the electronic kanban easily recognized.
在本發明被詳細描述之前,應當注意在以下的說明內容中,類似的元件是以相同的編號來表示。Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.
參閱圖2至圖4,本發明導光透鏡11之一實施例適合被實施為一導光裝置1的一部分。該導光裝置1包含一平板10、多個以棋盤陣列的方式形成在該平板10上的導光透鏡11、一連接該平板10的陽光反射層12、及一連接該陽光反射層12的多個數量與該等導光透鏡11數量相同的遮陽罩13。每一遮陽罩13位於在該等導光透鏡11其中一者的上緣,能有效遮蔽來自該上方的陽光。該平板10具有一入光端面101及一相反於該入光端面101的出光端面102。Referring to Figures 2 to 4, an embodiment of the light guiding lens 11 of the present invention is suitably implemented as part of a light guiding device 1. The light guiding device 1 comprises a flat plate 10, a plurality of light guiding lenses 11 formed on the flat plate 10 in a checkerboard array, a sunlight reflecting layer 12 connected to the flat plate 10, and a plurality of solar reflecting layers 12 connected thereto. The sunshade 13 is the same number as the number of the light guiding lenses 11. Each sunshade cover 13 is located at an upper edge of one of the light guiding lenses 11 to effectively shield sunlight from the upper side. The flat plate 10 has a light incident end surface 101 and a light exit end surface 102 opposite to the light incident end surface 101.
參閱圖5,每一導光透鏡11具有一供光線入射的入光面部111、一相反於該入光面部111且供該光線射出的出光面部112、一外露於該入光端面101的第一導光部及一外露於該出光端面102的第二導光部。該等導光透鏡11的該等入光面部111是位於該入光端面101,該等導光透鏡11的該等出光面部112以及該陽光反射層12(見圖3)是位於該平板10的該出光端面102。Referring to FIG. 5, each light guiding lens 11 has a light incident surface portion 111 for receiving light, a light emitting surface portion 112 opposite to the light incident surface portion 111 for emitting the light, and a first exposed light receiving end surface 101. a light guiding portion and a second light guiding portion exposed on the light emitting end surface 102. The light incident surface portions 111 of the light guiding lenses 11 are located on the light incident end surface 101, and the light emitting surface portions 112 of the light guiding lenses 11 and the sunlight reflecting layer 12 (see FIG. 3) are located on the flat plate 10. The light exit end surface 102.
參閱圖6,在本實施例中,每一導光透鏡11的結構相同,故以下僅介紹該等導光透鏡11其中一者。對於該導光透鏡11,該第一導光部是形成於該入光面部111的菲涅爾透鏡結構113而具有多個同心圓狀的稜鏡113a。該入光面部111朝該出光面部112凹陷並形成一用以收容一對應的發光元件(圖未示)的收容槽115,該菲涅爾透鏡結構113是位於該收容槽115的槽底。該第二導光部包括多個彼此由上而下橫向延伸地併列在該出光面部112的條狀稜鏡部114。每一條狀稜鏡部114具有一遠離該入光面部111地向下延伸的傾斜折射面114a。每一條狀稜鏡部114的該傾斜折射面114a與水平面具有一夾角θ 1(θ 2),在本實施例中,該夾角θ 1(θ 2)介於40°至85°之間,並不以此為限。在本實施例中,該等傾斜折射面114a分別與水平面的該等夾角θ 1,θ 2並非彼此相同,例如圖6中的該等傾斜折射面114a當中的一個傾斜折射面114a與水平面的夾角θ 1是明顯地相對大於另一傾斜折射面114a與水平面的夾角θ 2。詳細來說,傾斜折射面114a與水平面的夾角的數值由上而下依序為40度、53度、73度、45度、50度、80度、80度、80度、85度、82度、60度、70度、及65度。 Referring to FIG. 6, in the present embodiment, the structure of each of the light guiding lenses 11 is the same, and only one of the light guiding lenses 11 will be described below. In the light guiding lens 11, the first light guiding portion is a Fresnel lens structure 113 formed on the light incident surface portion 111, and has a plurality of concentric circles 113a. The light-incident surface portion 111 is recessed toward the light-emitting surface portion 112 and defines a receiving groove 115 for receiving a corresponding light-emitting element (not shown). The Fresnel lens structure 113 is located at the bottom of the receiving groove 115. The second light guiding portion includes a plurality of strip-shaped crotch portions 114 that are laterally extended from the top to the bottom and juxtaposed on the light-emitting surface portion 112. Each of the crotch portions 114 has an inclined refractive surface 114a extending downward from the light incident surface portion 111. The inclined refractive surface 114a of each of the strips 114 has an angle θ 1 (θ 2 ) with the horizontal mask, and in the embodiment, the angle θ 1 (θ 2 ) is between 40° and 85°, and Not limited to this. In the present embodiment, the angles θ 1 , θ 2 of the inclined refracting surfaces 114 a and the horizontal plane are not identical to each other, for example, the angle between one of the inclined refracting surfaces 114 a of FIG. 6 and the horizontal plane. θ 1 is significantly larger than the angle θ 2 between the other oblique refractive surface 114a and the horizontal plane. In detail, the value of the angle between the inclined refractive surface 114a and the horizontal plane is 40 degrees, 53 degrees, 73 degrees, 45 degrees, 50 degrees, 80 degrees, 80 degrees, 80 degrees, 85 degrees, 82 degrees from top to bottom. , 60 degrees, 70 degrees, and 65 degrees.
參閱圖2、圖7及圖8,該陽光反射層12以使每一第二導光部(即該等條狀稜鏡部114)露出的方式遮蔽該平板10的該出光端面102,並呈鋸齒狀且具有多個遠離該出光端面102地向上延伸的第一反射面121以及多個分別與該等第一反射面121相接且水平延伸的第二反射面122,以致來自斜上方的陽光被該第一反射面121及該第二反射面122向上反射。每一第一反射面121與水平面具有一夾角θ 3,當陽光這照射到該陽光反射層12時,該陽光反射層12將該陽光向上反射,如此,能使行人免於受到該陽光所致的反光的干擾。該夾角θ 3介於38.66°至56.98°之間,如此,能使得與水平面之間的夾角處於24度到49度之間的陽光(例如夕陽,圖8所示例的陽光光線與水平面之間的夾角呈49度)被向上反射。此外,在本實施例中,該等第一反射面121分別與水平面的該等夾角θ 3並非彼此相同,並不以此為限。 Referring to FIG. 2, FIG. 7, and FIG. 8, the sunlight reflecting layer 12 shields the light-emitting end surface 102 of the flat plate 10 in such a manner that each second light guiding portion (ie, the strip-shaped crotch portions 114) is exposed. a plurality of first reflective surfaces 121 extending upwardly away from the light-emitting end surface 102 and a plurality of second reflective surfaces 122 respectively extending from the first reflective surfaces 121 and extending horizontally so as to be from obliquely upward sunlight The first reflecting surface 121 and the second reflecting surface 122 are reflected upward. Each of the first reflecting surfaces 121 has an angle θ 3 with the horizontal mask. When the sunlight illuminates the sunlight reflecting layer 12, the sunlight reflecting layer 12 reflects the sunlight upward, so that the pedestrian is protected from the sunlight. Reflective interference. The angle θ 3 is between 38.66° and 56.98°, so that the angle between the horizontal plane and the horizontal plane is between 24 degrees and 49 degrees (for example, the sunset, the sunlight between the sunlight and the horizontal plane shown in FIG. 8). The angle is 49 degrees) and is reflected upward. In addition, in the present embodiment, the angles θ 3 of the first reflecting surfaces 121 and the horizontal plane are not identical to each other, and are not limited thereto.
參閱圖9,該用於一電子看板的導光裝置1被裝設在一電子看板(圖未示)時,每一導光透鏡11是供該電子看板的一發光元件931所產生的光線通過,以下僅以一個發光元件93配合一個導光透鏡11為例,說明該發光元件所發出的光線如何受到該導光透鏡11導引。Referring to FIG. 9, when the light guiding device 1 for an electronic kanban is mounted on an electronic kanban (not shown), each of the light guiding lenses 11 passes light generated by a light emitting element 931 of the electronic kanban. In the following, only one light-emitting element 93 is combined with a light guiding lens 11 as an example to explain how the light emitted by the light-emitting element is guided by the light guiding lens 11.
在一發光元件93所產生的光線(圖9僅示例地繪出四條光路)經由該入光面部111進入該導光透鏡11且經由該出光面部112射出該導光透鏡11的狀態下,該光線的方向於菲涅爾透鏡結構113(即該第一導光部)折射成朝向該出光面部112的平行光束,以致於該光線在該等傾斜折射面114a(即該第二導光部)折射後向下傾斜,得注意的是,由於該等夾角θ 1,θ 2並非彼此相同,使得該光線通過該等傾斜折射面114a後向下傾斜的部分的光路相對於一通過該發光元件93的水平面931的夾角(例如θ 4)是介於向上5度至向下35度之間,且能使該光線的多個部分的光路相對於該水平面931皆呈向下5度的方向而彼此相互疊加,其餘的部分的光則分布在向上5度至向下35度之間。補充說明的是,光強度定義為單位立體角的光通量,且光強度相關於相互疊加的單位立體角的光通量,換句話說,本實施例能提升相對於該水平面931呈向下5度的方向的光的強度,而產生符合需求之光型。在本實施例中,相對於該水平面光軸931向下5度的方向的光的強度能達到原始光源(即該發光元件93所產生的光線)的光強度的4倍 。 The light generated by a light-emitting element 93 (only four light paths are drawn by way of example in FIG. 9 ) enters the light guide lens 11 via the light incident surface portion 111 and emits the light guide lens 11 via the light exit surface 112, the light The direction of the Fresnel lens structure 113 (ie, the first light guiding portion) is refracted into a parallel light beam toward the light exiting surface portion 112 such that the light is refracted at the oblique refracting surface 114a (ie, the second light guiding portion) After the downward tilting, it is noted that since the included angles θ 1 , θ 2 are not identical to each other, the optical path of the portion where the light passes downward through the inclined refractive surface 114a is opposite to that passing through the light-emitting element 93. The angle of the horizontal plane 931 (for example, θ 4 ) is between 5 degrees and 35 degrees downward, and the optical paths of the portions of the light can be in a direction of 5 degrees downward with respect to the horizontal plane 931 Superimposed, the rest of the light is distributed between 5 degrees up to 35 degrees down. It is added that the light intensity is defined as the luminous flux per unit solid angle, and the light intensity is related to the luminous flux of the unit solid angle superimposed on each other. In other words, the present embodiment can increase the direction downward by 5 degrees with respect to the horizontal plane 931. The intensity of the light produces a light pattern that meets the needs. In the present embodiment, the intensity of the light in the direction of 5 degrees downward with respect to the horizontal axis 931 of the horizontal plane can reach 4 times the light intensity of the original light source (i.e., the light generated by the light-emitting element 93).
參閱圖10,當多個該導光裝置(圖未示)被裝設在一電子看板9’時,該等導光裝置(圖未示)是彼此相互拼接後裝設在電子看板的LED陣列(圖未示)前方,因此,該LED陣列所發出的光線向下傾斜故大部分能被行人91看見。Referring to FIG. 10, when a plurality of the light guiding devices (not shown) are mounted on an electronic kanban 9', the light guiding devices (not shown) are LED arrays that are spliced to each other and mounted on the electronic kanban. (not shown) in front, therefore, the light emitted by the LED array is tilted downward so that most of it can be seen by the pedestrian 91.
綜上所述,在本實施例中,該發光元件931所發出的光線於菲涅爾透鏡結構113折射後被匯聚且朝向該出光面部112,以致於該光線在該等條狀稜鏡部114折射後向下傾斜,如此,且自該電子看板投射出的光線能被導向為主要是向前地往下投射,再者,由於該等夾角θ 1,θ 2並非彼此相同,使得該光線通過該等傾斜折射面114a後向下傾斜的部分的光路相對於該發光元件93的一光軸931的夾角(例如θ 4)是介於向上5度至向下35度之間,且能使該光線的多個部分的光路相對於該水平面931皆呈向下5度的方向而彼此相互疊加,其餘的部分的光則分布在向上5度至向下35度之間,而產生符合需求之光型。此外,該陽光反射層12能將來自斜上方的陽光向上反射而不致干擾行人,大部分能被行人91看見,而能有效利用能源且使得電子看板顯示的文字或圖號容易被辨識,故確實能達成本發明之目的。 In summary, in the present embodiment, the light emitted by the light-emitting element 931 is condensed by the Fresnel lens structure 113 and is concentrated toward the light-emitting surface 112, so that the light is in the strip-shaped domes 114. After refracting, it is inclined downward, and thus, the light projected from the electronic kanban can be guided to be mainly projected downward, and further, since the angles θ 1 , θ 2 are not identical to each other, the light passes through The angle of the optical path of the portion inclined downwardly from the obliquely refracting surface 114a with respect to an optical axis 931 of the light-emitting element 93 (for example, θ 4 ) is between 5 degrees upward and 35 degrees downward, and the The optical paths of the plurality of portions of the light are superimposed on each other with respect to the horizontal plane 931 in a downward direction of 5 degrees, and the remaining portions of the light are distributed between 5 degrees and 35 degrees downward to produce a light pattern that meets the demand. . In addition, the sunlight reflecting layer 12 can reflect the sunlight from the oblique upwards without disturbing the pedestrians, and most of them can be seen by the pedestrian 91, and the energy can be effectively utilized and the characters or symbols displayed on the electronic board can be easily recognized. The object of the invention can be achieved.
惟以上所述者,僅為本發明之實施例而已,當不能以此限定本發明實施之範圍,凡是依本發明申請專利範圍及專利說明書內容所作之簡單的等效變化與修飾,皆仍屬本發明專利涵蓋之範圍內。However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.
1‧‧‧導光裝置1‧‧‧Light guide
10‧‧‧平板 10‧‧‧ tablet
101‧‧‧入光端面 101‧‧‧Incoming light end face
102‧‧‧出光端面 102‧‧‧Lighting end face
11‧‧‧導光透鏡 11‧‧‧Light guide lens
111‧‧‧入光面部 111‧‧‧ light face
112‧‧‧出光面部 112‧‧‧Lighting face
113‧‧‧菲涅爾透鏡結構 113‧‧‧Fresnel lens structure
113a‧‧‧稜鏡 113a‧‧‧稜鏡
114‧‧‧條狀稜鏡部 114‧‧‧Articles
114a‧‧‧傾斜折射面 114a‧‧‧ oblique refractive surface
115‧‧‧收容槽 115‧‧‧ Reception trough
12‧‧‧陽光反射層 12‧‧‧Sunlight Reflective Layer
121‧‧‧反射面 121‧‧‧reflecting surface
13‧‧‧遮陽罩 13‧‧‧ sunshade
9,9’‧‧‧電子看板 9,9’‧‧‧Electronic board
93‧‧‧發光元件 93‧‧‧Lighting elements
931‧‧‧水平面 931‧‧‧ horizontal plane
91‧‧‧行人 91‧‧‧Pedestrians
θ1‧‧‧夾角θ 1 ‧‧‧ angle
θ2‧‧‧夾角θ 2 ‧‧‧ angle
θ3‧‧‧夾角θ 3 ‧‧‧ angle
θ4‧‧‧夾角θ 4 ‧‧‧ angle
本發明之其他的特徵及功效,將於參照圖式的實施方式中清楚地呈現,其中: 圖1是一示意圖,說明現有的電子看板; 圖2是一立體圖,說明多個本發明導光透鏡的實施例被裝設在一平板上; 圖3是一立體分解圖,說明一導光裝置; 圖4是一後視圖,說明該導光裝置; 圖5是一沿圖4中V-V方向的部分剖視圖,說明該實施例; 圖6是圖5的一部分放大圖,說明該導光透鏡; 圖7是一側視圖,說明該實施例; 圖8是圖7的一部分放大圖,說明該導光裝置的一陽光反射層; 圖9是一前視圖,說明多個該導光裝置相互拼接;及 圖10是一示意圖,說明裝設有多個相互拼接的導光裝置的一電子看板的光線向下傾斜。Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: FIG. 1 is a schematic diagram illustrating a conventional electronic kanban; FIG. 2 is a perspective view illustrating a plurality of light guiding lenses of the present invention. Figure 3 is an exploded perspective view of a light guiding device; Figure 4 is a rear elevational view of the light guiding device; Figure 5 is a portion along the VV direction of Figure 4 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 6 is a partial enlarged view of FIG. 5 illustrating the light guiding lens; FIG. 7 is a side view illustrating the embodiment; FIG. 8 is a partial enlarged view of FIG. Figure 9 is a front view showing a plurality of the light guiding devices spliced to each other; and Figure 10 is a schematic view showing the light of an electronic kanban equipped with a plurality of light guiding devices spliced together tilt.
Claims (4)
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TW106123320A TWI645217B (en) | 2017-07-12 | 2017-07-12 | Light guiding lens |
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CN111336425A (en) * | 2020-03-09 | 2020-06-26 | 深圳市睿智龙电子科技有限公司 | Shadowless lamp, lamp panel and lighting unit thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103106803A (en) * | 2012-11-13 | 2013-05-15 | 苏州雍阳装饰材料有限公司 | Sunlight interference prevention device of traffic light |
TW201627961A (en) * | 2015-01-28 | 2016-08-01 | 光寶科技股份有限公司 | Signal light |
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2017
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CN103106803A (en) * | 2012-11-13 | 2013-05-15 | 苏州雍阳装饰材料有限公司 | Sunlight interference prevention device of traffic light |
TW201627961A (en) * | 2015-01-28 | 2016-08-01 | 光寶科技股份有限公司 | Signal light |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111336425A (en) * | 2020-03-09 | 2020-06-26 | 深圳市睿智龙电子科技有限公司 | Shadowless lamp, lamp panel and lighting unit thereof |
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