200949134 九、發明說明： 【發明所屬之技術領域】 .3 本發明涉及一種照明裝置，尤其涉及一種採用發光二 極體作為發光元件之照明裝置。 【先前技術】 目前，發光二極體（Light emitting Diode，LED)因具體積 小，效率高，壽命長等優點而逐漸取代現有之螢光燈或白 熾燈作為照明裝置之發光元件，以節省電能，減少資源之 ❹浪費。具體可參閱Michael S. Shiir等人於文獻Proceedings of the IEEE, Vol· 93，No. 10 (2005 年 10 月）中發表之 “Solid-State Lighting: Toward Superior Illumination”一文。 另一方面，隨著當今世界能源問題日趨緊張，太陽光 能作為一種清潔衛生且取之不盡之能源受到越來越多關 注，將太陽光能轉化為人們可使用之能源，如電能於先前 技術中通常藉由太陽能電池以實現。 β 考慮到以上因素，將照明裝置與太陽能電池相結合， ◎ 利用太陽能電池轉化太陽光能後所獲取之電能以驅動照明 裝置發光，正成為當今科技界之一大課題。 惟，於先前技術中，將照明裝置，如發光二極體與太 陽能電池相結合之製程往往較為複雜，且照明裝置與太陽 能電池相結合後作為一整體，其只能應用於照明，而無法 兼具其他方面之功用，如建築物之採光等。 有鑒於此，本發明提供一種照明裝置，其既可提供照 明又可提供建築物採光。 200949134 【發明内容】 - 下面將以實施例說明一種既可提供照明又可提供建築 .物採光之照明裝置。 一種照明裝置，包括一可透光基板，該基板包括一底 面、與該底面相交之至少一入光面及與該底面相對之一出 光面；複數固態光源’其相對該基板之至少一入光面設置， 該複數固態光源發射之光線由該至少一入光面入射至該基 ❹板後從該基板之出光面出射；以及至少一太陽能電池，其 相對該基板之底面設置’用於吸收太陽光並將太陽光能轉 化為電能，以提供電源至該複數固態光源。 相對於先前技術，該照明裝置藉由設置一可透光基 板，以及於該可透光基板之底面上設置一太陽能電池，一 方面，該太陽能電池可將太陽光能轉化為電能並對固態光 源供電，從而利用固態光源進行照明而節約能源；另一方 面，由於該基板可透光，故該照明裝置可讓部分太陽光直 ❹接透過’以提供提供建築物白天時之採光。 【實施方式】 下面將結合圖式，以對本發明實施例作進一步之詳細 說明。 請參閱圖1，本發明第一實施例提供之一種照明裝置 10，包括一可透光基板11，複數固態光源13及一太陽能電 池15。 該基板11可為一長方形結構，其包括一底面110、與 該底面110相交之至少一入光面112,以及與該底面11〇相 200949134 對之一出光面114。於本實施例中，該長方形結構具有四個 入光面112。該基板11可透光，其可為一玻璃基板。當然， 該基板 11 亦可採用其他透明之塑膠，如 PMMA(Poly methylmethacrylate,聚甲基丙烯酸甲酉旨）、 PC(Poly Carbonate，聚碳酸脂）、石夕樹脂（silicone)等製成。 該複數固態光源13與該基板11光學耦合，其可具體 為複數發光二極體。於本實施例中，該複數發光二極體相 對基板11之每個入光面112設置，其所發出之光線經該入 W光面112入射至基板11後，由該基板11對其進行光學引 導，如透射及反射等，使其從基板11之出光面114出射。 本領域技術人員可理解，該照明裝置10之四個入光面112 上可分別設置一電路板，該複數固態光源13設置於該電路 板上。 該太陽能電池15設置於該基板11之底面110上。具 體地，該基板11之底面110可藉由半導體製程形成複數透 ❹明導電薄膜116，如複數ITO(銦錫氧化物）層或複數IZO(銦 鋅氧化物）層。該太陽能電池15藉由該複數透明導電薄膜 116與該基板11相連接。進一步地，該照明裝置10可包括 一蓄電裝置（圖未示），如一蓄電池，該複數透明導電薄膜 116可作為該太陽能電池15之電極，以藉由其電連接該蓄 電裝置與該太陽能電池15。當太陽能電池15受太陽光照 射，並將太陽光能轉化為電能時，可藉由該蓄電裝置將電 能儲存於其内。當然，該蓄電裝置可進一步與該電路板電 性連接，從而使該複數固態光源13、太陽能電池15及蓄電 8 200949134 裝置三者形成電性相連，以利用該蓄電裝置對該複數固態 _光源13供電。 該太陽能電池15可具有一定之光透過率，其可具體為 » 基板石夕晶（Silicon-based)太陽能電池（單晶石夕，多晶石夕，非晶 矽），或者為III-V族半導體材料(AlAs、InAs、InP、GaP、 GaAs、GaN或其化合物）所製成之太陽能電池，又或者為銅 銦硒/銅銦硒鎵（CIGS/CIS)、碲化鎘（CdTe)材料，有機材料 或光敏感染料物質所製成之太陽能電池（dye-sensitized solar cell，DSSC)，且該太陽能電池15之厚度小於300微米 (μιη)，即該太陽能電池15為一薄膜太陽能電池（thin film solar cell) ° 該複數固態光源13及該太陽能電池15上可形成一保 護層（圖未示），如一樹脂層或一防水薄膜層，以對其起保護 作用，如防水防塵等。使用時，該照明裝置10可設置為辦 公樓之窗戶玻璃，該基板11之底面110面向室外設置，以 Q利用該太陽能電池15吸收太陽光並將太陽光能轉化為電 能，該基板11之出光面114面向室内設置。一方面，於白 天，由於該基板11及該太陽能電池15均可透光，故該照 明裝置10可讓部分之太陽光直接透射過該太陽能電池15 及該基板11，以提供建築物採光，從而使室内保持一定之 亮度。當然，該太陽能電池15於白天時可開啟，以將照射 至太陽能電池15,並被該太陽能電池15所吸收之太陽光轉 化為電能並儲存於該蓄電裝置内；另一方面，當夜晚來臨， 該太陽能電池15未接受到太陽光照時，可利用該蓄電裝置 200949134 所儲存之電能對該複數固態光源13供電。可理解，當該太 _陽能電池15對該複數固態光源13供電時，該複數固態光 源13發出之光由該基板11之出光面114出射，從而對室 * 内起照明作用。 為使複數固態光源13發出之光由該基板11之出光面 114出射時，其出光均勻，可於該出光面114上形成複數微 結構以使其成為一粗糙表面，且該微結構具體可為V形槽 (V-cut)或印刷網點。 請參閱圖2，本發明第二實施例提供之一種照明裝置 30，其與本發明第一實施例提供之照明裝置10基本相同， 差別僅在於：至少一太陽能電池35之數目為複數，且該複 數太陽能電池35間隔排布並設置於複數透明導電薄膜316 上；另，該基板31之出光面314形成一增亮膜（Bright Enhancement Film，BEF)，該基板31之四個入光面312還 開設複數收容槽3120以對應容納複數固態光源33,從而使 ◎照明裝置10之體積進一步小型化。 本領域技術人員可理解，該複數太陽能電池35之間之 間隔可增加透射過基板31之太陽光量，其可增強太陽光之 光透過率，該基板31之出光面314上所形成之增亮膜可增 加透射過基板31之太陽光量，故，相對第一實施例中之照 明裝置10,本實施例所提供之照明裝置30可進一步增加白 天室内之亮度。另，於本實施例中，由於該複數太陽能電 池35間隔排布，該基板31之底面310具有裸露於外界之 區域，太陽光可直接照射於該區域上並透射過基板31，故， 200949134 該太陽能電池35亦可設置為一不透光之太陽能電池35，其 _並不影響到本發明之實施。 # 請參閱圖3，本發明第三實施例提供之一種照明裝置 50，與本發明第二實施例提供之照明裝置30相比，其差異 在於：該照明裝置50之基板51之面積較大，且該基板51 出光面514上對應於太陽能電池55之間之間隔處開設複數 凹槽518，進一步地，相對該複數凹槽518之侧面5180設 置複數固態光源53。 ^ 當然，該複數凹槽518之侧面5180亦可開設複數收容 槽以對應容納該複數固態光源53。 通常，當該基板51之面積較大時，僅靠相對四個入光 面512設置之複數固態光源53發出之光線，其難以使由基 板51之出光面514出射之光均勻化，於本實施例中，藉由 開設該複數凹槽518並對應設置複數固態光源53，可使得 包含有較大面積基板51之照明裝置50具備較佳之出光均 ❹勻度。 請參閱圖4，本發明第四實施例提供之一種照明裝置 70，其與本發明第一實施例提供之照明裝置10基本相同， 差別僅在於：該至少一太陽能電池75為複數微型矽球。 照射至該複數微型矽球上之太陽光（如圖4中虛箭頭所 示）可被該複數微型矽球吸收並轉化為電能，而照射至該複 數微型矽球之間間隔之太陽光（如圖4中實箭頭所示）則可 進一步透射過基板71，以於白天時提供建築物採光。相較 於本發明第一實施例所提供之太陽能電池15，採用該複數 11 200949134 微型矽球所製成之太陽能電池75可允許更多之太陽光透射 過基板71，從而增強白天室内之亮度。 綜上所述，本發明確已符合發明專利之要件，遂依法 % 提出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，自不能以此限制本案之申請專利範圍。舉凡熟悉本案 技藝之人士援依本發明之精神所作之等效修飾或變化，皆 應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 ® 圖1係本發明第一實施例提供之照明裝置之結構示意 圖。 圖2係本發明第二實施例提供之照明裝置之結構示意 圖。 圖3係本發明第三實施例提供之照明裝置之結構示意 圖。 圖4係本發明第四實施例提供之照明裝置之剖面示意 ❹圖。 【主要元件符號說明】 10、30、50、70 11 、 31 、 51 、 71 13 、 33 、 53 15 、 35 、 55 、 75 110 、 310 112、312、512 114 、 314 、 514 照明裝置 基板 固態光源 太陽能電池 底面 入光面 出光面 12 316200949134 透明導電薄膜 116、 凹槽 518 收容槽 3120 侧面 5180200949134 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a lighting device, and more particularly to an illumination device using a light-emitting diode as a light-emitting element. [Prior Art] At present, the light emitting diode (LED) gradually replaces the existing fluorescent lamp or incandescent lamp as a light-emitting component of the lighting device due to the advantages of small specific capacity, high efficiency, long life, and the like, thereby saving electric energy. To reduce waste of resources. For details, see "Solid-State Lighting: Toward Superior Illumination" by Michael S. Shiir et al., Proceedings of the IEEE, Vol. 93, No. 10 (October 2005). On the other hand, as the world's energy problems become more and more tense, solar energy is receiving more and more attention as a clean and inexhaustible source of energy, transforming solar energy into energy that people can use, such as electricity. The technology is usually implemented by a solar cell. β Considering the above factors, combining lighting devices with solar cells, ◎ Using the energy obtained by solar cells to convert solar energy to drive lighting devices, is becoming a major issue in today's scientific and technological community. However, in the prior art, the process of combining a lighting device, such as a light-emitting diode, with a solar cell is often complicated, and the lighting device and the solar cell are combined as a whole, which can only be applied to illumination, and cannot be combined. It has other functions, such as lighting of buildings. In view of this, the present invention provides a lighting device that provides both illumination and building lighting. 200949134 SUMMARY OF THE INVENTION - An illumination device that provides both illumination and architectural lighting can be described by way of example. A illuminating device comprising a permeable substrate, the substrate comprising a bottom surface, at least one light incident surface intersecting the bottom surface, and a light emitting surface opposite to the bottom surface; the plurality of solid state light sources ' at least one light incident relative to the substrate Setting, the light emitted by the plurality of solid-state light sources is emitted from the light-emitting surface of the substrate after the at least one light-incident surface is incident on the base plate; and at least one solar cell is disposed with respect to a bottom surface of the substrate for absorbing the sun Light converts solar energy into electrical energy to provide power to the plurality of solid state light sources. Compared with the prior art, the illumination device is provided with a light transmissive substrate, and a solar cell is disposed on the bottom surface of the light transmissive substrate. On the one hand, the solar cell can convert solar energy into electrical energy and the solid state light source. Power is supplied to save energy by using a solid-state light source for illumination; on the other hand, since the substrate is transparent, the illumination device allows part of the sunlight to pass through to provide light for daylighting during the building. [Embodiment] Hereinafter, embodiments of the present invention will be further described in detail in conjunction with the drawings. Referring to FIG. 1, a lighting device 10 according to a first embodiment of the present invention includes a light transmissive substrate 11, a plurality of solid state light sources 13 and a solar battery 15. The substrate 11 can be a rectangular structure including a bottom surface 110, at least one light incident surface 112 intersecting the bottom surface 110, and a light exit surface 114 opposite the bottom surface 112009. In the present embodiment, the rectangular structure has four light incident surfaces 112. The substrate 11 is transparent to light and can be a glass substrate. Of course, the substrate 11 can also be made of other transparent plastics such as PMMA (Poly methylmethacrylate), PC (Poly Carbonate), and Silicone. The plurality of solid state light sources 13 are optically coupled to the substrate 11, which may be specifically a plurality of light emitting diodes. In this embodiment, the plurality of light emitting diodes are disposed on each of the light incident surfaces 112 of the substrate 11. The light emitted by the light emitting diodes is incident on the substrate 11 through the light incident surface 112, and is optically reflected by the substrate 11. Guide, such as transmission and reflection, is emitted from the light exit surface 114 of the substrate 11. It can be understood by those skilled in the art that a plurality of circuit boards can be respectively disposed on the four light incident surfaces 112 of the illumination device 10. The plurality of solid state light sources 13 are disposed on the circuit board. The solar cell 15 is disposed on the bottom surface 110 of the substrate 11. Specifically, the bottom surface 110 of the substrate 11 can be formed by a semiconductor process to form a plurality of transparent conductive films 116, such as a plurality of ITO (indium tin oxide) layers or a plurality of IZO (indium zinc oxide) layers. The solar cell 15 is connected to the substrate 11 by the plurality of transparent conductive films 116. Further, the illuminating device 10 can include a power storage device (not shown), such as a battery, and the plurality of transparent conductive films 116 can serve as electrodes of the solar cell 15 to electrically connect the power storage device and the solar battery 15 . When the solar cell 15 is exposed to sunlight and converts solar energy into electrical energy, electrical energy can be stored therein by the electrical storage device. Of course, the power storage device can be further electrically connected to the circuit board, so that the plurality of solid state light sources 13, the solar battery 15 and the power storage device 8200949134 are electrically connected to each other to utilize the power storage device for the plurality of solid state light sources 13 powered by. The solar cell 15 may have a certain light transmittance, which may specifically be a substrate of a Silicon-based solar cell (single crystal, polycrystalline slab, amorphous germanium), or a III-V group. A solar cell made of a semiconductor material (AlAs, InAs, InP, GaP, GaAs, GaN or a compound thereof) is either a copper indium selenide/copper indium selenide gallium (CIGS/CIS) or a cadmium telluride (CdTe) material. A solar cell (DSSC) made of an organic material or a light-sensitive dye material, and the thickness of the solar cell 15 is less than 300 micrometers, that is, the solar cell 15 is a thin film solar cell (thin film) The solar cell 13 and the solar cell 15 can form a protective layer (not shown), such as a resin layer or a waterproof film layer, to protect it, such as waterproof and dustproof. In use, the illuminating device 10 can be configured as a window glass of an office building, and the bottom surface 110 of the substrate 11 faces outwardly, and the solar cell 15 absorbs sunlight and converts solar energy into electric energy, and the substrate 11 emits light. Face 114 faces the interior. On the one hand, during the daytime, since the substrate 11 and the solar cell 15 can transmit light, the illumination device 10 can directly transmit part of the sunlight to the solar cell 15 and the substrate 11 to provide building lighting. Keep the room a certain brightness. Of course, the solar cell 15 can be turned on during the daytime to illuminate the solar cell 15 and be converted into electric energy by the solar cell 15 and stored in the power storage device; on the other hand, when night comes, When the solar cell 15 is not receiving sunlight, the plurality of solid-state light sources 13 can be powered by the electrical energy stored in the power storage device 200949134. It can be understood that when the solar energy source 15 supplies power to the plurality of solid-state light sources 13, the light emitted by the plurality of solid-state light sources 13 is emitted from the light-emitting surface 114 of the substrate 11, thereby illuminating the interior of the chamber. In order to make the light emitted from the plurality of solid-state light sources 13 emerge from the light-emitting surface 114 of the substrate 11, the light is uniform, and a plurality of microstructures may be formed on the light-emitting surface 114 to form a rough surface, and the microstructure may be V-cut or printed dot. Referring to FIG. 2, a lighting device 30 according to a second embodiment of the present invention is substantially the same as the lighting device 10 provided by the first embodiment of the present invention, except that the number of at least one solar cell 35 is plural, and The plurality of solar cells 35 are arranged at intervals and disposed on the plurality of transparent conductive films 316. The light-emitting surface 314 of the substrate 31 forms a brightness enhancement film (BEF), and the four light-incident surfaces 312 of the substrate 31 are further A plurality of storage slots 3120 are opened to accommodate the plurality of solid-state light sources 33, so that the volume of the illuminating device 10 is further reduced in size. Those skilled in the art will appreciate that the spacing between the plurality of solar cells 35 increases the amount of sunlight transmitted through the substrate 31, which enhances the light transmittance of sunlight, and the brightness enhancement film formed on the light exit surface 314 of the substrate 31. The amount of sunlight transmitted through the substrate 31 can be increased, so that the illumination device 30 provided in the present embodiment can further increase the brightness of the daytime room compared to the illumination device 10 of the first embodiment. In addition, in the embodiment, since the plurality of solar cells 35 are arranged at intervals, the bottom surface 310 of the substrate 31 has a region exposed to the outside, and sunlight can be directly irradiated on the region and transmitted through the substrate 31. Therefore, 200949134 The solar cell 35 can also be provided as an opaque solar cell 35, which does not affect the implementation of the present invention. Referring to FIG. 3, a lighting device 50 according to a third embodiment of the present invention has a difference in that the area of the substrate 51 of the lighting device 50 is larger than that of the lighting device 30 according to the second embodiment of the present invention. And a plurality of grooves 518 are formed on the light-emitting surface 514 of the substrate 51 corresponding to the interval between the solar cells 55. Further, a plurality of solid-state light sources 53 are disposed opposite to the side surface 5180 of the plurality of grooves 518. Of course, the side surface 5180 of the plurality of recesses 518 can also open a plurality of receiving slots to accommodate the plurality of solid state light sources 53. Generally, when the area of the substrate 51 is large, only the light emitted from the plurality of solid-state light sources 53 disposed on the four light-incident surfaces 512 is difficult to homogenize the light emitted from the light-emitting surface 514 of the substrate 51. In the example, by providing the plurality of recesses 518 and correspondingly providing the plurality of solid-state light sources 53, the illumination device 50 including the large-area substrate 51 can be provided with better uniformity of light output. Referring to FIG. 4, a lighting device 70 according to a fourth embodiment of the present invention is substantially the same as the lighting device 10 provided by the first embodiment of the present invention, except that the at least one solar cell 75 is a plurality of micro-balls. The sunlight that is incident on the plurality of micro-balls (as indicated by the dashed arrow in FIG. 4) can be absorbed by the plurality of micro-balls and converted into electrical energy, and irradiated to the sunlight between the plurality of micro-balls (eg, The solid arrow in Figure 4 can then be further transmitted through the substrate 71 to provide building daylight during the day. Compared with the solar cell 15 provided by the first embodiment of the present invention, the solar cell 75 made of the plurality 11 200949134 miniature ball can allow more sunlight to pass through the substrate 71, thereby enhancing the brightness of the daytime room. In summary, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the present invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic structural view of a lighting device according to a first embodiment of the present invention. Fig. 2 is a schematic view showing the structure of a lighting device according to a second embodiment of the present invention. Fig. 3 is a schematic view showing the structure of a lighting device according to a third embodiment of the present invention. Fig. 4 is a schematic cross-sectional view showing a lighting device according to a fourth embodiment of the present invention. [Description of main component symbols] 10, 30, 50, 70 11 , 31 , 51 , 71 13 , 33 , 53 15 , 35 , 55 , 75 110 , 310 112 , 312 , 512 114 , 314 , 514 illuminator substrate solid state light source Solar cell bottom surface light-emitting surface 12 316200949134 Transparent conductive film 116, groove 518 receiving groove 3120 side 5180
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