TWM492407U - Lamp - Google Patents

Description

燈具 Lamp

本新型關於燈具，特別是指一種利用導光板產生蝠翼狀光強度分佈的燈具。 The present invention relates to a luminaire, and more particularly to a luminaire that uses a light guide plate to generate a batwing light intensity distribution.

一般而言，要產生具有特殊光型的照明光源，大多利用反射件以改變光線的傳遞路徑，使產生對應的光強度分佈。 In general, to produce an illumination source having a special light type, most of the reflectors are used to change the transmission path of the light to produce a corresponding light intensity distribution.

然而，反射件的功能僅在於的反射光線，故通過反射件的光線僅會投射至反射件之反射面的對面側，而在非反射面對面側之位置而無光亮產生。故要產生特殊光型，例如具有蝠翼型光強度分部的光線，就必須組合多個反射件，並使前述反射件對應需求光型調整反射件的擺設方向及擺設角度；這不僅提升燈具的製造難度，也提高燈具的製作成本。 However, the function of the reflecting member is only to reflect the light, so that the light passing through the reflecting member is only projected to the opposite side of the reflecting surface of the reflecting member, and no light is generated at the position on the non-reflecting facing side. Therefore, in order to generate a special light type, for example, a light having a batwing type light intensity portion, it is necessary to combine a plurality of reflecting members, and the reflecting member corresponds to a required light type adjusting reflecting member in a directional direction and a setting angle; The manufacturing difficulty also increases the production cost of the lamps.

本創作揭示內容之一技術態樣在於提供一種燈具，所述燈具利用導光板以產生具有蝠翼型包絡線之光型。 One of the technical aspects of the present disclosure is to provide a luminaire that utilizes a light guide to create a light pattern having a batwing envelope.

本技術態樣於一實施方式中，提供一種燈具，燈具包含一光學模組及一發光元件。光學模組包含導光板、反射式背板及擴散板，導光板包含一頂面、一底面、一側面，以及複數凹槽，底面相對於頂面，凹槽位於頂面，側面鄰接於頂面及底面，凹槽的形狀始於頂面，朝底面凹陷。由導光板的側剖面視之，凹槽包含底壁及 鄰接於底壁之側壁，底壁及側壁間之一夾角大於80度。 In an embodiment, a light fixture includes an optical module and a light emitting component. The optical module comprises a light guide plate, a reflective back plate and a diffusing plate. The light guide plate comprises a top surface, a bottom surface and a side surface, and a plurality of grooves, the bottom surface is opposite to the top surface, the groove is located on the top surface, and the side surface is adjacent to the top surface. And the bottom surface, the shape of the groove starts from the top surface and is recessed toward the bottom surface. Viewed from a side cross section of the light guide plate, the recess includes a bottom wall and Adjacent to the side wall of the bottom wall, an angle between the bottom wall and the side wall is greater than 80 degrees.

發光元件設置於側面，發光元件發出的光線由側面進入導光板，凹槽改變進入導光板之光線的傳遞路徑，使由頂面出射之光線具有蝠翼狀光強度包絡線。 The light-emitting element is disposed on the side surface, and the light emitted by the light-emitting element enters the light guide plate from the side surface, and the groove changes the transmission path of the light entering the light guide plate, so that the light emitted from the top surface has a batwing light intensity envelope.

反射式背板設置於底面，用以反射由底面外溢而出的光線，以提升光線的使用效率，同時會聚由頂面出射之光線。擴散片設置於頂面，用以會聚由頂面出射的光線。 The reflective back plate is disposed on the bottom surface to reflect the light from the bottom surface to enhance the use efficiency of the light, and to converge the light emitted from the top surface. The diffusion sheet is disposed on the top surface for concentrating light emitted from the top surface.

根據本新型的其他實施方式，底壁平行於頂面，藉以且底壁與頂面間的距離為0.4毫米。 According to a further embodiment of the invention, the bottom wall is parallel to the top surface, whereby the distance between the bottom wall and the top surface is 0.4 mm.

10‧‧‧發光元件 10‧‧‧Lighting elements

20‧‧‧光學模組 20‧‧‧Optical module

22‧‧‧反射式背板 22‧‧‧Reflective backplane

24‧‧‧導光板 24‧‧‧Light guide

240‧‧‧頂面 240‧‧‧ top surface

241‧‧‧圖案層 241‧‧‧pattern layer

242‧‧‧底面 242‧‧‧ bottom

244‧‧‧側面 244‧‧‧ side

246‧‧‧凹槽 246‧‧‧ Groove

2460‧‧‧底壁 2460‧‧‧ bottom wall

2462‧‧‧側壁 2462‧‧‧ side wall

26‧‧‧擴散片 26‧‧‧Diffuser

L1、L2、L3、L4‧‧‧包絡線 L1, L2, L3, L4‧‧‧ envelope

第一圖為本揭示內容一實施方式之燈具的結構示意圖。 The first figure is a schematic structural view of a lamp according to an embodiment of the disclosure.

第二圖為本揭示內容一實施方式之燈具的局部放大圖。 The second figure is a partial enlarged view of a lamp according to an embodiment of the disclosure.

第三圖繪示通過導光板之光線的光強度分佈圖。 The third figure shows the light intensity distribution of the light passing through the light guide plate.

第四圖繪示通過導光板及反射式背板之光線的光強度分佈圖。 The fourth figure shows the light intensity distribution of the light passing through the light guide plate and the reflective back plate.

第五圖繪示對應第一圖所示之燈具的光強度分佈圖。 The fifth figure shows the light intensity distribution map corresponding to the luminaire shown in the first figure.

第六圖繪表示光線通過包含散射式背板之光學模組的光強度分佈圖。 The sixth plot depicts the light intensity profile of the light passing through the optical module containing the diffused backplane.

配合參閱第一圖，其係本新型一實施方式之燈具的結構示意圖。燈具包含一發光元件10及一光學模組20，發光元件10通常為點光源，可由發光二極體實現之，但亦不排除其他可能。光學模組20包含反射式背板22、導光板24及擴散片26，光學模組20用以改變 發光元件10發出之光線的光強度分佈，使燈具的光強度包絡線呈蝠翼狀。 Referring to the first figure, it is a schematic structural view of a lamp according to an embodiment of the present invention. The luminaire comprises a illuminating element 10 and an optical module 20. The illuminating element 10 is usually a point source, which can be realized by a illuminating diode, but does not exclude other possibilities. The optical module 20 includes a reflective back plate 22, a light guide plate 24 and a diffusion sheet 26, and the optical module 20 is used to change The light intensity distribution of the light emitted by the light-emitting element 10 causes the light intensity envelope of the luminaire to be batwing.

導光板24呈平板狀，可透光，通常由壓克力(PMMA)或塑膠(PC)組成，但亦不排除其他均等物；例如，導光板24可為丙烯酸樹脂(Acrylic Resin)、環烯烴聚合物(COC)、聚甲基丙烯酸甲酯(PMMA)、聚碳酸酯(PC)、聚醚醯亞胺(Polyetherimide)、氟碳聚合物(Fluorocarbon Polymer)或矽膠(Silicone)所構成材料組群中之至少一種材料或其它可代替之材料。 The light guide plate 24 has a flat shape and is transparent to light, and is usually composed of acrylic (PMMA) or plastic (PC), but does not exclude other equals; for example, the light guide plate 24 may be acrylic resin (Acrylic Resin), cycloolefin A group of materials composed of polymer (COC), polymethyl methacrylate (PMMA), polycarbonate (PC), polyetherimide, fluorocarbon polymer or silicone (Silicone) At least one of the materials or other alternative materials.

導光板24包含一頂面240、一底面242及一側面244，底面242相對於頂面240，底面242平行於頂面240；側面244鄰接於頂面240及底面242，側面244垂直於頂面240及底面242。發光元件10設置於側面244，發光元件10的發光面面對側面244，藉以提高發光元件10發出之光線進入導光板24的機率，進而提高光利用效率。 The light guide plate 24 includes a top surface 240, a bottom surface 242 and a side surface 244. The bottom surface 242 is opposite to the top surface 240, and the bottom surface 242 is parallel to the top surface 240. The side surface 244 is adjacent to the top surface 240 and the bottom surface 242, and the side surface 244 is perpendicular to the top surface. 240 and bottom surface 242. The light-emitting element 10 is disposed on the side surface 244, and the light-emitting surface of the light-emitting element 10 faces the side surface 244, thereby increasing the probability that the light emitted from the light-emitting element 10 enters the light guide plate 24, thereby improving light utilization efficiency.

導光板24的頂面240形成有一圖案層241，圖案層241用以改變傳遞光線的行進方向，使得由頂面240出射之光線具有蝠翼狀光強度包絡線L1，如第三圖所示。 The top surface 240 of the light guide plate 24 is formed with a pattern layer 241 for changing the traveling direction of the transmitted light so that the light emitted from the top surface 240 has a batwing light intensity envelope L1 as shown in the third figure.

復參閱第一圖及第二圖，圖案層241由複數凹槽246所構成，凹槽246為由導光板24的頂面240朝向底面242方向凹陷的結構。值得注意的是，圖式僅為例示，非真實比例；具體來說，導光板24厚度可設計約為2到10mm，而凹槽246的最大空腔直徑僅約0.06mm，且其深度僅約0.003到0.01mm。凹槽246包含一底壁2460及一側壁2462，側壁2462鄰接底壁2460及頂面240。底壁2460平行於頂面240，底壁2460與側壁2462間的夾角θ為不小於80度，換句話說 ，底壁2460與側壁2462間的夾角θ為等於或大於80度的鈍角。側壁2462會反射部分傳遞於其上的光線，降低進入導光板24的光線直接通過頂面240出射，使頂面240出射的光線具有蝠翼狀光強度包絡線L1，如第三圖所示。由第三圖可以得知，由導光板24的頂面240出射的光線會聚於0度兩側分別各70度的位置。 Referring to the first and second figures, the pattern layer 241 is formed by a plurality of grooves 246 which are recessed by the top surface 240 of the light guide plate 24 toward the bottom surface 242. It should be noted that the drawings are merely illustrative and non-realistic; in particular, the thickness of the light guide plate 24 can be designed to be about 2 to 10 mm, and the maximum cavity diameter of the groove 246 is only about 0.06 mm, and the depth is only about 0.003 to 0.01 mm. The recess 246 includes a bottom wall 2460 and a side wall 2462 adjacent to the bottom wall 2460 and the top surface 240. The bottom wall 2460 is parallel to the top surface 240, and the angle θ between the bottom wall 2460 and the side wall 2462 is not less than 80 degrees, in other words The angle θ between the bottom wall 2460 and the side wall 2462 is an obtuse angle equal to or greater than 80 degrees. The side wall 2462 reflects the light transmitted to the portion of the light guide plate 24, and the light entering the light guide plate 24 is directly emitted through the top surface 240, so that the light emitted from the top surface 240 has a batwing light intensity envelope L1, as shown in the third figure. As can be seen from the third figure, the light emitted from the top surface 240 of the light guide plate 24 is concentrated at a position of 70 degrees on each side of the 0 degree.

背板22設置於底面242，背板22為反射式背板，背板22例如可為3M公司的高反射率反射片(Enhanced Specular Reflector)、富鹿公司或ALALOD公司的鏡面鋁板，但亦不排除其他可能。背板22用以反射由底面242外溢出的光線，使前述光線重新進入導光板24，藉以提升光利用效率。 The back plate 22 is disposed on the bottom surface 242, and the back plate 22 is a reflective back plate. The back plate 22 can be, for example, 3M Company's Enhanced Specular Reflector, Fulu Company or ALALOD's mirror aluminum plate, but not Exclude other possibilities. The back plate 22 is configured to reflect the light that overflows from the outside of the bottom surface 242, so that the light is re-entered into the light guide plate 24, thereby improving light utilization efficiency.

第四圖繪示的包絡線L2為發光元件10發出之光線進入包含導光板24及反射式背板22之光學模組的光強度分佈。由第四圖的包絡線L2可以得知，通過導光板24及反射式背板22的光線會聚於0度兩側分別各60度的位置。 The envelope L2 shown in the fourth figure is a light intensity distribution of the light emitted by the light-emitting element 10 into the optical module including the light guide plate 24 and the reflective back plate 22. It can be seen from the envelope L2 of the fourth figure that the light passing through the light guide plate 24 and the reflective back plate 22 is concentrated at positions of 60 degrees on both sides of 0 degrees.

擴散片26設置於頂面240，擴散片26會聚由頂面240出射之光線，使導光板24的頂面240出射並通過擴散片26之光線的的包絡線L3會聚在0度兩側各40至50度的位置，如第五圖所示。 The diffusion sheet 26 is disposed on the top surface 240. The diffusion sheet 26 converges the light emitted from the top surface 240, and the top surface 240 of the light guide plate 24 is emitted and converges on the sides of the 0-degree light through the envelope L3 of the light of the diffusion sheet 26. To a position of 50 degrees, as shown in the fifth figure.

在此要說明的是，當設置於導光板24底面242的反射式背板由散射式背板所取代時，由導光板24外溢出的光線會於散射式背板的表面發生散射，使通過具有散射式背板之光線不僅會聚在0度兩側分別各70度的位置，同時也會聚在0度兩側各30度範圍內，如第六圖包絡線L4所示。 It should be noted that when the reflective back plate disposed on the bottom surface 242 of the light guide plate 24 is replaced by the scattering back plate, the light overflowing from the outside of the light guide plate 24 is scattered on the surface of the scattering back plate to pass through. The light with the scattering back plate not only converges at 70 degrees on both sides of 0 degrees, but also gathers within 30 degrees on both sides of 0 degrees, as shown by the envelope L4 of the sixth figure.

然以上所述者，僅為本新型之較佳實施方式，當不能限定本創作 實施之範圍，即凡依本新型申請專利範圍所作之均等變化與修飾等，皆應仍屬本創作之專利涵蓋範圍意圖保護之範疇。 However, the above description is only a preferred embodiment of the present invention, and the present creation cannot be limited. The scope of implementation, that is, the equivalent changes and modifications made in accordance with the scope of the patent application of the present invention, shall remain within the scope of the intended protection of the scope of the patent.

10‧‧‧發光元件 10‧‧‧Lighting elements

20‧‧‧光學模組 20‧‧‧Optical module

22‧‧‧反射式背板 22‧‧‧Reflective backplane

24‧‧‧導光板 24‧‧‧Light guide

240‧‧‧頂面 240‧‧‧ top surface

241‧‧‧圖案層 241‧‧‧pattern layer

242‧‧‧底面 242‧‧‧ bottom

244‧‧‧側面 244‧‧‧ side

246‧‧‧凹槽 246‧‧‧ Groove

2460‧‧‧底壁 2460‧‧‧ bottom wall

2462‧‧‧側壁 2462‧‧‧ side wall

26‧‧‧擴散片 26‧‧‧Diffuser

Claims (3)

一種燈具，包含：一光學模組，包含：一導光板，包含一頂面、一底面、一側面，以及複數凹槽，該底面相對於該頂面，該等凹槽位於該頂面，該側面鄰接於該頂面及該底面，各該凹槽的形狀始於該頂面，朝該底面凹陷，各該凹槽包含一底壁及一鄰接於該底壁之側壁，該底壁及該側壁間之一夾角大於80度；一反射式背板，設置於該底面；以及一擴散片，設置於該頂面；一發光元件，設置於該側面，該發光元件發出的光線由該側面進入該導光板，該等凹槽使由該頂面出射之光線具有蝠翼狀光強度包絡線，該擴散片會聚該頂面出射之光線。 A luminaire includes: an optical module, comprising: a light guide plate, comprising a top surface, a bottom surface, a side surface, and a plurality of grooves, wherein the bottom surface is opposite to the top surface, the grooves are located on the top surface, The side surface is adjacent to the top surface and the bottom surface, and the shape of each of the grooves starts from the top surface and is recessed toward the bottom surface. Each of the grooves includes a bottom wall and a side wall adjacent to the bottom wall, the bottom wall and the bottom wall An angle between the side walls is greater than 80 degrees; a reflective back plate is disposed on the bottom surface; and a diffusion sheet is disposed on the top surface; a light emitting element is disposed on the side surface, and the light emitted by the light emitting element enters from the side surface The light guide plate causes the light emitted from the top surface to have a batwing light intensity envelope, and the diffusion sheet converges the light emitted from the top surface. 如請求項1所述之燈具，其中該底壁平行於該頂面。 The luminaire of claim 1 wherein the bottom wall is parallel to the top surface. 如請求項2所述之燈具，其中該底壁與該頂面間的距離為0.4毫米。 The luminaire of claim 2, wherein the distance between the bottom wall and the top surface is 0.4 mm.