201017067 t九、發明說明： '【發明所屬之技術領域】 #· 本發明涉及一種照明裝置，尤其涉及一種以發光二極 體為光源之照明裝置。 【先前技術】 發光二極體（LED)具有無汞、發光效率高、使用壽 命長之優點。隨著LED技術之成熟，利用LED作為光源之 ❹照明裝置陸續上市。目前，LED照明裝置已應用於市政照 明、住宅照明、通訊設備、醫療設備、工業設備等諸多領 域。 請參見圖1，一種以LED作為光源之照明裝置100包 括一燈箱（圖未示）及設置於燈箱底板11上之複數發光二 極體12。使用時，複數從發光二極體12發出之光線以不同 角度照向物體14，而使物體14於偵測面16上留下多重影 子（未標示），這樣便降低了照明品質。於實際應用中，如 ^提筆寫字或進行手術時，重影現象往往會造成視覺疲勞或 操作失誤。 【發明内容】 鐾於上述狀況，有必要提供一種可削弱重影之照明裝 置。 一種照明裝置，其包括一燈箱及複數發光二極體，該 複數發光二極體設置於該燈箱之底板上。該照明裝置還包 201017067 . 括依次設置於該複數發光二極體上方之第一光學板。該第 .一光學板包括一入光面及與該入光面相對之出光面，以及 形成於該出光面之沿至少兩不同方向延伸之複數v型脊結 構，該沿不同方向延伸之複數v型脊結構相互交錯。 該照明裝置之第一光學設置於複數發光二極體上方， 其出光面之微結構可使射入第一光學板之光線發生特定之 折射、反射與繞射等光學作用，將光線進行擴散並向特定 視角範圍内聚集，從而形成亮度均勻之面光源。該照明裝 ®置可形成均勻之出射光線。當出射光照射於物體上時，可 削弱重影現象，提高照明品質。 【實施方式】 下面將結合附圖及實施例對本發明之照明裝置作進一 步詳細說明。 請參見圖2,本發明實施例一之照明裝置200包括一燈 爲箱22、複數發光二極體24、一第一光學板26、一第二光學 板28及一透明保護板30。複數發光二極體24設置於燈箱 22之底板上。第一光學板26與第二光學板28設於燈箱22 内並依次間隔設置於複數發光二極體24上方。透明保護板 30蓋設於燈箱22之開口處。第一光學板26與複數發光二 極體24間隔一定距離而形成一第一擴散空間31，第二光學 板28與第一光學板26間隔一定距離而形成一第二擴散空 間32。 燈箱22可由具有高反射率之金屬或塑膠製成，或塗佈 6 201017067 :有南反射率塗層之金屬或塑膠製成。 * 明參見圖3 ’第一光學板26包括入光面260及與入光 面260相對之出光面261。入光面遍為平坦表面，其位於 靠近複數發光二極體24 —側。 第一光學板26於出光面261形成沿第一方向&延伸 之複數第-V型脊結構262、沿第二方向&延伸之複數第 - v型脊結構263、沿第三方向&延伸之複數第三ν型脊 結構264及沿第四方向X 伸 ❹ 4延伸之複數第四ν型脊結構 5。上述>。不同方向延伸之ν型脊結構相互交錯。其卜 沿第二方向Χ2延伸之複數第三¥型脊結構加與沿第四方 向Χ4延伸之複數第四V型脊結構265皆通過沿第一方向 ==一/型脊結構Μ與沿第三方…伸之第 一孓脊、、Ό構264間之交點。四個方向χ χ 中相鄰兩方向間之央角為45度。上述所有構及j 直截面之頂角取值範圍為8〇度 β201017067 tIX. 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 source. [Prior Art] A light-emitting diode (LED) has the advantages of no mercury, high luminous efficiency, and long service life. With the maturity of LED technology, ❹ lighting devices using LEDs as light sources have been listed. At present, LED lighting devices have been used in many fields such as municipal lighting, residential lighting, communication equipment, medical equipment, and industrial equipment. Referring to FIG. 1, a lighting device 100 using an LED as a light source includes a light box (not shown) and a plurality of light emitting diodes 12 disposed on the light box bottom plate 11. In use, the plurality of rays emitted from the LED 12 illuminate the object 14 at different angles, leaving the object 14 with multiple shadows (not shown) on the detection surface 16, thus degrading the illumination quality. In practical applications, such as writing or performing surgery, ghosting often causes visual fatigue or operational errors. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a lighting device that can reduce ghosting. A lighting device includes a light box and a plurality of light emitting diodes, and the plurality of light emitting diodes are disposed on a bottom plate of the light box. The illumination device further includes 201017067. The first optical plate is sequentially disposed above the plurality of LEDs. The first optical plate includes a light incident surface and a light emitting surface opposite to the light incident surface, and a plurality of v-shaped ridge structures extending in at least two different directions formed on the light emitting surface, the plurality of v-shaped ridge structures extending in different directions The ridge structures are interlaced. The first optical component of the illumination device is disposed above the plurality of light-emitting diodes, and the microstructure of the light-emitting surface allows the light incident on the first optical plate to undergo specific optical effects such as refraction, reflection and diffraction to diffuse the light and Agglomerates into a specific range of viewing angles to form a surface light source of uniform brightness. The lighting fixture can form a uniform outgoing light. When the emitted light is irradiated onto the object, the ghost phenomenon can be weakened and the illumination quality can be improved. [Embodiment] Hereinafter, the lighting device of the present invention will be further described in detail with reference to the accompanying drawings and embodiments. Referring to FIG. 2, a lighting device 200 according to a first embodiment of the present invention includes a light box 22, a plurality of light emitting diodes 24, a first optical plate 26, a second optical plate 28, and a transparent protective plate 30. The plurality of light emitting diodes 24 are disposed on the bottom plate of the light box 22. The first optical plate 26 and the second optical plate 28 are disposed in the light box 22 and are sequentially disposed above the plurality of light emitting diodes 24 at intervals. The transparent protection plate 30 is disposed at the opening of the light box 22. The first optical plate 26 is spaced apart from the plurality of light-emitting diodes 24 to form a first diffusion space 31, and the second optical plate 28 is spaced apart from the first optical plate 26 to form a second diffusion space 32. The light box 22 can be made of metal or plastic with high reflectivity, or coated with 6 201017067: metal or plastic with a south reflectivity coating. * See FIG. 3' The first optical plate 26 includes a light incident surface 260 and a light exit surface 261 opposite to the light incident surface 260. The light incident surface is a flat surface which is located close to the side of the plurality of light emitting diodes 24. The first optical plate 26 forms a plurality of first-V-shaped ridge structures 262 extending in the first direction & a plurality of -v-type ridge structures 263 extending in the second direction & in the third direction & The plurality of third ν-type ridge structures 264 extending and the fourth ν-type ridge structure 5 extending along the fourth direction X are extended. Above>. The v-shaped ridge structures extending in different directions are interlaced. The plurality of third-type ridge structures extending along the second direction Χ2 and the plurality of fourth V-shaped ridge structures 265 extending along the fourth direction Χ4 are both passed along the first direction==one/type ridge structure and along the first The three parties... the first ridge of the ridge, and the intersection of 264. The central angle between the two adjacent directions in the four directions χ 为 is 45 degrees. The apex angle of all the above configurations and the straight section of j is in the range of 8 degrees β
刑卷紝接叫山 义王丄叫度，问方向上相鄰V ❹中，： = Γχ心距離可為〇.025毫米至1毫米。本實施例 四個方向Xl、X2m4_v 距離分別為 Dl、D2、D3^mn「^rBKh 从尹丄 3，、ϋ4 且 D1=D3 = WD2=WD4。此 二卜；藉由調整頂角之大小，可於一定程 板26之增光率及出光視角。 I光予 =L 63、264、265相互交錯，而形成複數三棱錐 凹槽266 ’複數三棱錐凹槽266緊 承在相連，其十四個相互連 接之具有共同連接點之三棱 形成四角星形267。複數四相互連接之侧壁 月生Φ 267複數四角星形267呈 7 201017067 ， 第一光學板26之總體厚度可為0.4毫米至4毫米。第 • 一光學板26可由聚曱基丙烯酸曱酯、聚碳酸酯、聚苯乙烯、 苯乙烯-曱基丙烯酸曱酯共聚物中之一種或一種以上之材料 注塑成型而成。製備過程中需於模具上設置與三棱錐凹槽 266相應之凸起結構，以便使第一光學板26可於單次注塑 過程中成型。 第二光學板28之材料及結構與第一光學板26相同。 透明保護板30可為透明玻璃板或透明塑膠板，其可防 ❿止灰塵進入燈箱22,並可防止第二光學板28出光面之微結 構被損傷。 本實施例照明裝置200中，第一光學板26與第二光學 板28位於燈箱22内部，其可由支撐架支撐或藉由黏接方 式固定於燈箱22内側壁上。第一光學板26與第二光學板 28依次間隔設置於複數發光二極體24之上方，第一光學板 26與發光二極體24間隔之距離及第二光學板28與第一光 •學板26間隔之距離可實際情況作調整，一般地，出光均勻 ❹ 度相同時，燈箱22之深度與發光二極體24之數量成反平 方，當發光二極體24之數量較多時，燈箱22之深度較小， 第一光學板26與發光二極體24間隔之距離及第二光學板 28與第一光學板26間隔之距離可設置得小一些，當發光二 極體24之數量較少時，燈箱22之深度較大，第一光學板 26與發光二極體24間隔之距離及第二光學板28與第一光 學板26間隔之距離相應地設置得大一些。 使用時，發光二極體24發射出之光線經第一擴散空間 8 201017067 ,31擴散作用後進入第一光學板26，由於第一光學板26之 -出光面261形成有特定排佈之三棱錐凹槽266,使光線於第 一光學板26内發生特定之折射、散射、反射與繞射等光學 作用，將光線擴散形成複數虛擬光源，同時使光線向特定 視角範圍内聚集。一發光二極體24發出之光線經第一光學 板26後，形成環繞於發光二極體24之八個虛擬光源。該 複數虛擬光源經第二擴散空間32擴散作用後進入第二光學 板28。由於第二光學板28出光面形成有特定排佈之三棱錐 ❹凹槽之傾斜表面結構，使該複數被擴散之虛擬光源進一步 形成更多之虛擬光源，同時將光線擴散均勻。 由此可見，在照明裝置200中，第一光學板26和第二 光學板28出光面特殊之表面結構，使光線發生特定之折 射、散射、反射與繞射等光學作用，將光線進行擴散形成 複數虛擬光源並向特定視角範圍内聚集，從而形成亮度均 勻之面光源。實際應用中，照明裝置200發出之光線均勻 π地照射於物體上且相對於物體之入射角基本相同，從而使 響 物體僅於偵測面上留下單個影子，避免了重影現象之產生。 請參見圖5，本發明實施例二之第一光學板46與第一 光學板26具有相似之結構，其不同在於：出光面461形成 有沿三個不同方向延伸之複數長條狀V型脊結構，沿不同 方向延伸之複數長條狀V型脊結構相互交錯。其中沿一方 向延伸之複數V型脊結構通過另外沿兩不同方向延伸並相 交之複數V型脊結構間之交點。複數長條狀V型脊結構之 頂角為50至120度。與第一光學板26類似，第一光學板 9 201017067 ,46可使發光二極體24發出之光線發生特定之光學作用，將 .光線擴散成複數虛擬光源之同時使光線向特定視角範圍内 聚集。 請參見圖6，本發明實施例三之第一光學板66與實施 例一之第一光學板26相似，其不同在於：於第一光學板66 之出光面661上形成有沿兩不同方向延伸之長條狀V形脊 結構，即複數相互平行之沿第一方向Zi延伸之長條狀V形 脊結構662及複數互平行沿第二方向Z2延伸之長條狀V形 ❹脊結構663，且第一方向Z!延伸之長條狀V形脊結構662 和第二方向Z2廷伸之長條狀V形脊結構663垂直相交。 第二光學板28之表面微結構可與第一光學板26、46、 66之表面微結構完全相同，即第二光學板28之出光面上形 成有沿至少兩不同方向延伸之複數V型脊結構，不同方向 延伸之複數V型脊結構相互交錯。 第一光學板與第二光學板應用於照明裝置200時，二 I者出光面之表面結構可不相同，如：當第一光學板之出光 ❿ 面具有沿四個方向延伸之長條狀V形脊結構時，第二光學 板之出光面可為具有沿兩個方向延伸之長條狀V形脊結構 或沿三個方向延伸之長條狀V形脊結構。 可以理解，第二光學板也可省略，照明裝置200可僅 利用第一光學板及其出光面之微結構使射入第一光學板之 光線發生特定之折射、反射與繞射等光學作用，從而將光 線進行擴散並向特定視角範圍内聚集，形成亮度較均勻之 面光源。 10 201017067 * 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係一種照明裝置使用時產生重影之示意圖。 圖2係本發明實施例一之照明裝置之剖面示意圖。 ® 圖3係圖2所示照明裝置之第一光學板之立體圖。 圖4係圖2中之發光二極體光源經過圖3所示之第一 光學板光學作用後測試圖。 圖5係實施例二之第一光學板之立體圖。 圖6係實施例三之第一光學板之立體圖。 【主要元件符號說明】 照明裝置 100、200 底板 11 發光二極體 12、24 物體 14 偵測面 16 燈箱 22 入光面 260 第一光學板 26 、 46 ' 66 出光面 261 ' 661 > 461 11 201017067 V型脊結構 262、263、264、265、 662、663 三棱錐凹槽 266 四角星形 267 第二光學板 28 透明保護板 30 第一擴散空間 31 第二擴散空間 32 ❿ 12The squad is called the mountain king, and asks the direction of the adjacent V ,, : = The distance of the heart can be 025.025 mm to 1 mm. In the fourth embodiment, the distances X1 and X2m4_v are respectively D1, D2, D3^mn "^rBKh from Yin Yi 3, ϋ 4 and D1 = D3 = WD2 = WD4. This is achieved by adjusting the size of the apex angle, The light-increasing rate and the light-emitting angle of the plate 26 can be interdigitated. I-lights = L 63, 264, and 265 are interdigitated to form a plurality of triangular pyramid grooves 266 'the plurality of triangular pyramid grooves 266 are closely connected, and ten The four interconnected triangular edges having a common connection point form a four-pointed star 267. The plurality of four interconnected sidewalls are formed by a monthly Φ 267 complex four-pointed star 267 of 7 201017067, and the total thickness of the first optical plate 26 can be 0.4. The millimeter to 4 mm. The first optical plate 26 may be injection molded from one or more materials selected from the group consisting of polydecyl methacrylate, polycarbonate, polystyrene, and styrene-mercapto acrylate copolymer. During the preparation process, a convex structure corresponding to the triangular pyramid groove 266 is provided on the mold, so that the first optical plate 26 can be formed in a single injection molding process. The material and structure of the second optical plate 28 and the first optical plate 26 is the same. The transparent protection plate 30 can be a transparent glass plate or The plastic plate can prevent the dust from entering the light box 22, and can prevent the microstructure of the light-emitting surface of the second optical plate 28 from being damaged. In the illumination device 200 of the embodiment, the first optical plate 26 and the second optical plate 28 are located. The inside of the light box 22 can be supported by the support frame or fixed to the inner side wall of the light box 22 by adhesive bonding. The first optical plate 26 and the second optical plate 28 are sequentially disposed above the plurality of light-emitting diodes 24, the first optical The distance between the plate 26 and the LEDs 24 and the distance between the second optical plate 28 and the first optical plate 26 can be adjusted. Generally, when the uniformity of the light is the same, the depth and illumination of the light box 22 are the same. The number of the diodes 24 is inversely squared. When the number of the light-emitting diodes 24 is large, the depth of the light box 22 is small, the distance between the first optical plate 26 and the light-emitting diodes 24, and the second optical plate 28 are The distance between the first optical plates 26 can be set smaller. When the number of the light-emitting diodes 24 is small, the depth of the light box 22 is large, the distance between the first optical plate 26 and the light-emitting diodes 24, and the second The optical plate 28 is spaced apart from the first optical plate 26 The distance is correspondingly set larger. In use, the light emitted by the LEDs 24 diffuses through the first diffusion space 8 201017067, 31 and enters the first optical plate 26, because the light-emitting surface 261 of the first optical plate 26 A triangular pyramid groove 266 is formed with a specific arrangement to cause specific optical effects such as refraction, scattering, reflection and diffraction in the first optical plate 26 to diffuse the light to form a complex virtual light source while making the light to a specific angle of view. The light emitted from the light-emitting diodes 24 passes through the first optical plate 26 to form eight virtual light sources that surround the light-emitting diodes 24. The plurality of virtual light sources diffuse through the second diffusion space 32 and enter the second optical plate 28. Since the light-emitting surface of the second optical plate 28 is formed with a slanted surface structure of a specially arranged triangular pyramidal groove, the plurality of diffused virtual light sources further form more virtual light sources, and the light is uniformly diffused. It can be seen that in the illumination device 200, the first optical plate 26 and the second optical plate 28 have a special surface structure of the light-emitting surface, so that the light is specifically refracted, scattered, reflected, and diffracted, and the light is diffused. A plurality of virtual light sources are aggregated and concentrated over a specific viewing angle to form a uniform surface light source of uniform brightness. In practical applications, the light emitted by the illumination device 200 is uniformly π-illuminated on the object and the incident angle with respect to the object is substantially the same, so that the object only leaves a single shadow on the detection surface, thereby avoiding the occurrence of ghost phenomenon. Referring to FIG. 5, the first optical plate 46 of the second embodiment of the present invention has a similar structure to the first optical plate 26, except that the light-emitting surface 461 is formed with a plurality of elongated V-shaped ridges extending in three different directions. The structure, the plurality of strip-shaped V-shaped ridge structures extending in different directions are interlaced. The plurality of V-shaped ridge structures extending in one direction pass through intersections between a plurality of V-shaped ridge structures which additionally extend in two different directions and intersect. The apex angle of the plurality of elongated V-shaped ridge structures is 50 to 120 degrees. Similar to the first optical plate 26, the first optical plate 9 201017067, 46 can cause a specific optical effect of the light emitted by the light-emitting diode 24 to diffuse the light into a plurality of virtual light sources while concentrating the light to a specific viewing angle range. . Referring to FIG. 6, the first optical plate 66 of the third embodiment of the present invention is similar to the first optical plate 26 of the first embodiment, except that the light-emitting surface 661 of the first optical plate 66 is formed to extend in two different directions. The long strip-shaped V-shaped ridge structure, that is, the plurality of long V-shaped ridge structures 662 extending in the first direction Zi parallel to each other and the plurality of long V-shaped ridge structures 663 extending in parallel with the second direction Z2, And the long V-shaped ridge structure 662 extending in the first direction Z! and the long V-shaped ridge structure 663 extending in the second direction Z2 intersect perpendicularly. The surface microstructure of the second optical plate 28 may be identical to the surface microstructure of the first optical plates 26, 46, 66, that is, the light-emitting surface of the second optical plate 28 is formed with a plurality of V-shaped ridges extending in at least two different directions. The structure, the plurality of V-shaped ridge structures extending in different directions are interlaced. When the first optical plate and the second optical plate are applied to the illumination device 200, the surface structures of the light-emitting surfaces of the two optical plates may be different, for example, when the light-emitting surface of the first optical plate has a long V-shaped shape extending in four directions. In the ridge structure, the light-emitting surface of the second optical plate may be an elongated V-shaped ridge structure extending in two directions or an elongated V-shaped ridge structure extending in three directions. It can be understood that the second optical plate can also be omitted, and the illumination device 200 can utilize the microstructure of the first optical plate and its light-emitting surface to cause specific optical effects such as refraction, reflection, and diffraction of the light incident on the first optical plate. Thereby, the light is diffused and gathered into a specific viewing angle range to form a surface light source having a relatively uniform brightness. 10 201017067 * In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application 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 diagram of a ghost image generated when a lighting device is used. 2 is a schematic cross-sectional view of a lighting device according to Embodiment 1 of the present invention. ® Figure 3 is a perspective view of the first optical plate of the illumination device of Figure 2. 4 is a test diagram of the light-emitting diode source of FIG. 2 after optical action of the first optical plate shown in FIG. Figure 5 is a perspective view of the first optical plate of the second embodiment. Figure 6 is a perspective view of the first optical plate of the third embodiment. [Description of main component symbols] Illumination device 100, 200 Base plate 11 Light-emitting diode 12, 24 Object 14 Detection surface 16 Light box 22 Light-incident surface 260 First optical plate 26, 46' 66 Light-emitting surface 261 ' 661 > 461 11 201017067 V-shaped ridge structure 262, 263, 264, 265, 662, 663 triangular pyramid groove 266 four-pointed star 267 second optical plate 28 transparent protection plate 30 first diffusion space 31 second diffusion space 32 ❿ 12