TWI404892B - Illumination device - Google Patents
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- TWI404892B TWI404892B TW97140848A TW97140848A TWI404892B TW I404892 B TWI404892 B TW I404892B TW 97140848 A TW97140848 A TW 97140848A TW 97140848 A TW97140848 A TW 97140848A TW I404892 B TWI404892 B TW I404892B
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Abstract
Description
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。 The invention relates to a lighting device, in particular to a lighting device with a light emitting diode as a light source.
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。 Light-emitting diodes (LEDs) have the advantages of no mercury, high luminous efficiency and long service life. With the maturity of LED technology, 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, industrial equipment, and the like.
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，重影現象往往會造成視覺疲勞或操作失誤。 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.
鑒於上述狀況，有必要提供一種可削弱重影之照明裝置。 In view of the above, it is necessary to provide a lighting device that can reduce ghosting.
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。該照明裝置還包括設置於 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、與該入光面相對之出光面及形成於出光面之複數相互平行之長條狀柱形凸起，其中該第一光學板進一步包括形成於入光面之複數相互平行之長條狀弧形凹槽，該長條狀弧形凹槽之延伸方向平行於該第一光學板之出光面之長條狀柱形凸起之延伸方向。 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 lighting device further includes a setting a first optical plate above the plurality of light emitting diodes. The first optical plate includes a light incident surface, a light exit surface opposite to the light incident surface, and a plurality of elongated cylindrical protrusions formed on the light exit surface, wherein the first optical plate further comprises a light incident surface The plurality of strip-shaped arc-shaped grooves parallel to each other, the extending direction of the elongated arc-shaped grooves being parallel to the extending direction of the elongated cylindrical protrusions of the light-emitting surface of the first optical plate.
上述照明裝置之第一光學板設置於複數發光二極體上方，其出光面之特殊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，將光線擴散並向特定視角範圍內聚集，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，其照射於物體時，可削弱重影現象，提高照明品質。 The first optical plate of the illumination device is disposed above the plurality of light-emitting diodes, and the special 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 gathers in a specific range of viewing angles to form a surface light source with uniform brightness. The illuminating device can form a uniform outgoing light, which can weaken the ghost phenomenon and improve the illumination quality when it is irradiated on the object.
100、200‧‧‧照明裝置 100, 200‧‧‧ lighting devices
11‧‧‧底板 11‧‧‧floor
12、24‧‧‧發光二極體 12.24‧‧‧Lighting diodes
14‧‧‧物體 14‧‧‧ objects
16‧‧‧偵測面 16‧‧‧Detection surface
22‧‧‧燈箱 22‧‧‧Lightbox
26、46、66、86‧‧‧第一光學板 26, 46, 66, 86‧‧‧ first optical board
260、460、660、860‧‧‧入光面 260, 460, 660, 860‧‧‧ into the glossy surface
262、462、662、862‧‧‧出光面 262, 462, 662, 862‧‧ ‧ light surface
264、664、864‧‧‧柱形凸起 264,664,864‧‧‧ cylindrical protrusion
28‧‧‧第二光學板 28‧‧‧Second optical plate
31‧‧‧第一擴散空間 31‧‧‧First diffusion space
32‧‧‧第二擴散空間 32‧‧‧Second diffusion space
463、863‧‧‧弧形凹槽 463, 863‧‧‧ curved grooves
666、866‧‧‧V形凸起 666, 866‧‧‧V-shaped bulge
圖1係一種照明裝置使用時產生重影之示意圖。 FIG. 1 is a schematic diagram of a ghost image generated when a lighting device is used.
圖2係本發明實施例一之照明裝置之剖面示意圖。 2 is a schematic cross-sectional view of a lighting device according to Embodiment 1 of the present invention.
圖3係圖2所示照明裝置之第一光學板之立體圖。 Figure 3 is a perspective view of the first optical plate of the illumination device of Figure 2.
圖4係圖3之第一光學板之沿線IV-IV之剖視圖。 Figure 4 is a cross-sectional view along line IV-IV of the first optical plate of Figure 3.
圖5係實施例二之第一光學板之立體圖。 Figure 5 is a perspective view of the first optical plate of the second embodiment.
圖6係實施例三之第一光學板之立體圖。 Figure 6 is a perspective view of the first optical plate of the third embodiment.
圖7係圖6之第一光學板之沿線VII-VII之立體圖。 Figure 7 is a perspective view of the first optical plate of Figure 6 taken along line VII-VII.
圖8係實施例四之第一光學板之立體圖。 Figure 8 is a perspective view of the first optical plate of the fourth embodiment.
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。 The lighting device of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
請參見圖2，本發明實施例一之照明裝置200包括一燈箱22、複數發光二極體24、一第一光學板26及一第二光學板28。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內並依次間隔設置於複數發光二極體24之上方，且第二光學板28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。 Referring to FIG. 2, the illumination device 200 of the first embodiment of the present invention includes a light box 22, a plurality of light emitting diodes 24, a first optical plate 26, and a second optical plate 28. 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, and the second optical plate 28 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. The second optical plate 28 is spaced apart from the first optical plate 26 to form a second diffusion space 32.
燈箱22可由具有高反射率之金屬或塑膠製成，或塗佈有高反射率塗層之金屬或塑膠製成。 The light box 22 can be made of metal or plastic having high reflectivity or metal or plastic coated with a high reflectivity coating.
請同時參見圖3和圖4，第一光學板26包括入光面260、與入光面260相對之出光面262及形成於出光面262之複數長條狀柱形凸起264。 Referring to FIG. 3 and FIG. 4 simultaneously, the first optical plate 26 includes a light incident surface 260, a light exit surface 262 opposite to the light incident surface 260, and a plurality of elongated cylindrical protrusions 264 formed on the light exit surface 262.
出光面262之複數長條狀柱形凸起264相互平行。每一長條狀柱形凸起264之垂直截面為圓弧形。將長條狀柱形凸起264中圓弧之半徑記為R1，相鄰長條狀柱形凸起264之中心間距記為P1，每一長條狀柱形凸起264之最大高度記為H1，則R1、P1及H1滿足以下關係式：0.025毫米≦P1≦1.5毫米，P1/4≦R1≦2P1，0.01毫米≦H1≦R1。當相鄰兩長條狀柱形凸起264間之中心間距P1為275微米時，每一長條狀柱形凸起264 之半徑R1為137.5微米，每一長條狀柱形凸起264之最大高度H1為110微米。 The plurality of elongated cylindrical protrusions 264 of the light exit surface 262 are parallel to each other. Each of the elongated cylindrical protrusions 264 has a circular arc shape in a vertical section. The radius of the arc in the long cylindrical protrusion 264 is denoted as R1, and the center distance of the adjacent elongated column protrusion 264 is denoted as P1, and the maximum height of each elongated cylindrical protrusion 264 is recorded as H1, then R1, P1 and H1 satisfy the following relationship: 0.025 mm ≦ P1 ≦ 1.5 mm, P 1/4 ≦ R1 ≦ 2P1, 0.01 mm ≦ H1 ≦ R1. When the center-to-center distance P1 between two adjacent elongated cylindrical protrusions 264 is 275 micrometers, each elongated cylindrical protrusion 264 The radius R1 is 137.5 microns, and the maximum height H1 of each elongated cylindrical protrusion 264 is 110 microns.
可以理解，第一光學板26之出光面262之長條狀柱形凸起264之垂直截面還可為橢圓弧形。 It can be understood that the vertical cross section of the elongated cylindrical protrusion 264 of the light exit surface 262 of the first optical plate 26 may also be an elliptical arc.
第一光學板26之總體厚度T1可為0.4毫米至4毫米。第一光學板26可由聚甲基丙烯酸甲酯、聚碳酸酯、聚苯乙烯、苯乙烯-甲基丙烯酸甲酯共聚物中之一種或一種以上之材料注塑成型而成。製備第一光學板26過程中需於模具上設置與長條狀柱形凸起264相應之凹陷結構，以便使第一光學板26可於單次注塑過程中成型。 The overall thickness T1 of the first optical plate 26 may be from 0.4 mm to 4 mm. The first optical plate 26 may be injection molded from one or more of polymethyl methacrylate, polycarbonate, polystyrene, and styrene-methyl methacrylate copolymer. In the process of preparing the first optical plate 26, a recessed structure corresponding to the elongated cylindrical protrusions 264 is disposed on the mold so that the first optical plate 26 can be formed in a single injection molding process.
第一光學板26採用注塑成型之方式一體成型，其上之長條狀柱形凸起264和第一光學板26之其他部分一起形成，因此可使得長條狀柱形凸起264具有較高之結構強度，同時還能提升長條狀柱形凸起264和第一光學板26其他部分之結合力，從而可避免或減少長條狀柱形凸起264於使用中被損壞之危險。 The first optical plate 26 is integrally formed by injection molding, and the elongated cylindrical protrusions 264 thereon are formed together with other portions of the first optical plate 26, so that the elongated cylindrical protrusions 264 can be made higher. The structural strength can also increase the bonding force of the elongated cylindrical protrusions 264 and other portions of the first optical plate 26, thereby avoiding or reducing the risk of the elongated cylindrical protrusions 264 being damaged in use.
本實施例中，第二光學板28之材料、製備方法及結構與第一光學板26完全相同。第二光學板28之出光面上也形成有複數長條狀柱形凸起。將第一光學板26與第二光學板28裝配於燈箱22中時，第一光學板26之出光面262之長條狀柱形凸起264之延伸方向垂直於第二光學板28之出光面之長條狀柱形凸起之延伸方向。第二光學板28之出光面上之長條狀柱形凸起與 第二光學板28之其他部分間具有較佳之結合強度，其不易被刮傷，這樣就不用於照明裝置200之燈箱22之開口處蓋設保護板。 In this embodiment, the material, preparation method and structure of the second optical plate 28 are identical to those of the first optical plate 26. A plurality of elongated cylindrical protrusions are also formed on the light-emitting surface of the second optical plate 28. When the first optical plate 26 and the second optical plate 28 are assembled in the light box 22, the elongated cylindrical protrusions 264 of the light-emitting surface 262 of the first optical plate 26 extend perpendicularly to the light-emitting surface of the second optical plate 28. The direction in which the elongated cylindrical protrusions extend. a long columnar protrusion on the light exit surface of the second optical plate 28 The other portions of the second optical plate 28 have a better bonding strength, which is not easily scratched, so that the protective plate is not covered by the opening of the light box 22 of the illumination device 200.
第一光學板26位於燈箱22之內部，其可由支撐架支撐或藉由黏接方式固定於燈箱22之內側壁上。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間隔之距離可根據實際情況作調整。一般地，在出光均勻度相同之情況下，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。 The first optical plate 26 is located inside the light box 22, and may 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 plate 26 is spaced apart from the light-emitting diodes 24, and the second optical plate 28 and the first optical plate 26 are spaced apart from each other. The distance between the intervals can be adjusted according to the actual situation. Generally, in the case where the uniformity of light emission is the same, the depth of the light box 22 is inversely squared with the number of the light emitting diodes 24. When the number of the light emitting diodes 24 is large, the depth of the light box 22 is small, the first optical The distance between the plate 26 and the light emitting diode 24 and the distance between the second optical plate 28 and the first optical plate 26 can be set smaller. When the number of the light emitting diodes 24 is small, the depth of the light box 22 is relatively large. The distance between the first optical plate 26 and the light-emitting diodes 24 and the distance between the second optical plate 28 and the first optical plate 26 are set larger.
使用時，發光二極體24發出之光線經第一擴散空間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262形成有特定排佈之複數長條狀柱形凸起264之表面結構，使光線於第一光學板26內發生了特定之折射、散射、反射與繞射等光學作用，將光線擴散成複數面積較大之面光源之同時使光線向特定視角範圍內聚集。該複數被擴散成較大面積之面光源經第二擴散空間32擴散後進入第二光學板28，由於第二光學板28之出光面形成有複數長條狀柱形凸起之表面結構， 且該長條狀柱形凸起之延伸方向垂直於第一光學板26之長條狀柱形凸起264，使該複數被擴散之面光源進一步擴散形成更大面積之面光源並向特定視角範圍內聚集，從而形成亮度均勻之面光源。 In use, the light emitted by the light-emitting diodes 24 diffuses through the first diffusion space 31 and enters the first optical plate 26. Since the light-emitting surface 262 of the first optical plate 26 is formed with a plurality of elongated strip-shaped convex protrusions of a specific arrangement. The surface structure of 264 causes the light to undergo specific optical effects such as refraction, scattering, reflection and diffraction in the first optical plate 26, and diffuses the light into a plurality of large-area surface light sources while making the light to a specific viewing angle range. Gather inside. The surface light source diffused into a larger area is diffused into the second optical plate 28 through the second diffusion space 32, and the surface of the second optical plate 28 is formed with a plurality of long cylindrical protrusions. And extending the elongated cylindrical protrusion perpendicular to the elongated cylindrical protrusion 264 of the first optical plate 26, so that the plurality of diffused surface light sources are further diffused to form a larger area surface light source and directed to a specific angle of view Aggregate within the range to form a uniform surface light source of uniform brightness.
由此可見，第一光學板26和第二光學板28之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，從而將光線兩次面光源化和擴散並向特定視角範圍內聚集，從而形成亮度均勻之面光源。於實際應用中，照明裝置200發出之光線均勻地照射於物體上，其作用於物體上之光線相對於物體之入射角基本相同，而使物體於偵測面上留下單個影子，避免了重影現象之產生。同時，第一光學板26與第二光學板28之設置可減少光線損耗，大幅度提升照明裝置200之照度，試驗表明，使用第一光學板26與第二光學板28後，照明裝置200之照度約可提升22%。 It can be seen that the special surface structure of the light-emitting surface of the first optical plate 26 and the second optical plate 28 causes the light to undergo specific optical effects such as refraction, scattering, reflection and diffraction, thereby light-emitting and diffusing the light twice. And gathers in a specific range of viewing angles to form a surface light source with uniform brightness. In practical applications, the light emitted by the illumination device 200 is uniformly irradiated onto the object, and the incident angle of the light acting on the object is substantially the same as the incident angle of the object, so that the object leaves a single shadow on the detection surface, thereby avoiding heavy weight. The phenomenon of shadow phenomenon. At the same time, the arrangement of the first optical plate 26 and the second optical plate 28 can reduce the light loss and greatly improve the illumination of the illumination device 200. The test shows that after the first optical plate 26 and the second optical plate 28 are used, the illumination device 200 Illumination can be increased by about 22%.
請參見圖5，本發明實施例二之第一光學板46包括一入光面460及一與入光面460相對之出光面462。第一光學板46與第一光學板26具有相似之結構，其不同之處在於：入光面460上還形成有複數相互平行之長條狀弧形凹槽463。 Referring to FIG. 5, the first optical plate 46 of the second embodiment of the present invention includes a light incident surface 460 and a light exit surface 462 opposite to the light incident surface 460. The first optical plate 46 has a similar structure to the first optical plate 26, except that the light incident surface 460 is further formed with a plurality of elongated arcuate grooves 463 which are parallel to each other.
本實施例中，入光面460上之長條狀弧形凹槽463之垂直截面為半圓弧形。將入光面460上之相鄰兩個長條狀弧形凹槽463之中心間距記為P2，圓弧半徑記為R2，圓弧最大深度記為H2，則P2、R2及H2滿足如下關係式：0.025毫米≦P2≦1毫米，P1/4≦R2≦2P2，0.01毫米≦H2≦R2。換而言之，相鄰兩 弧形凹槽463之中心間距P2可為0.025毫米至1毫米，圓弧半徑R1可為0.006毫米至2毫米，圓弧最大深度H2可為0.01毫米至2毫米。入光面460上之長條狀弧形凹槽463之垂直截面還可為橢圓弧形。 In this embodiment, the vertical arcuate groove 463 on the light incident surface 460 has a semicircular arc shape. The center-to-center spacing of the adjacent two elongated arcuate grooves 463 on the light-incident surface 460 is denoted as P2, the radius of the arc is denoted as R2, and the maximum depth of the arc is denoted as H2, then P2, R2 and H2 satisfy the following relationship Formula: 0.025 mm ≦ P2 ≦ 1 mm, P 1/4 ≦ R2 ≦ 2P2, 0.01 mm ≦ H2 ≦ R2. In other words, two adjacent The arcuate groove 463 may have a center-to-center spacing P2 of 0.025 mm to 1 mm, a circular arc radius R1 of 0.006 mm to 2 mm, and a circular arc maximum depth H2 of 0.01 mm to 2 mm. The vertical cross section of the elongated arcuate groove 463 on the light incident surface 460 may also be an elliptical arc.
請同時參見圖6和圖7，本發明實施例三之第一光學板66包括一入光面660及一與入光面相對之出光面662。第一光學板66與第一光學板26具有相似之結構，其不同之處在於：出光面662上交替設置有相互平行之複數長條狀柱形凸起664及複數相互平行之長條狀V形凸起666。 Referring to FIG. 6 and FIG. 7 simultaneously, the first optical plate 66 of the third embodiment of the present invention includes a light incident surface 660 and a light exit surface 662 opposite to the light incident surface. The first optical plate 66 has a similar structure to the first optical plate 26, and the difference is that the light-emitting surface 662 is alternately provided with a plurality of elongated cylindrical protrusions 664 parallel to each other and a plurality of parallel strips V which are parallel to each other. Shaped protrusion 666.
長條狀柱形凸起664之垂直截面為半圓弧形。將長條狀V形凸起666之寬度記為D1，頂角記為θ，高度記為H3；則D1、θ、H3滿足如下關係式：0.025毫米≦D1≦1毫米，80度≦θ≦100度，0.01毫米≦H3≦3毫米。將長條狀柱形凸起664之寬度記為L1，半徑記為R3，高度記為H4，則L1、R3、H4滿足如下關係式：0.025毫米≦L1≦1.5毫米，L1/4≦R3≦2L1，0.01毫米≦H4≦R3。藉由調節D1、θ、H3、L1、R3、及H4之數值，可調整長條狀V型凸起666及長條狀柱形凸起664之形狀，從而調節第一光學板66之增光率及出光視角。 The vertical section of the elongated cylindrical protrusion 664 has a semicircular arc shape. The width of the long V-shaped protrusion 666 is denoted as D1, the apex angle is denoted by θ, and the height is denoted by H3; then D1, θ, H3 satisfy the following relationship: 0.025 mm ≦ D1 ≦ 1 mm, 80 degrees ≦ θ ≦ 100 degrees, 0.01 mm ≦ H3 ≦ 3 mm. The width of the long columnar protrusion 664 is denoted by L1, the radius is denoted by R3, and the height is denoted by H4, then L1, R3, H4 satisfy the following relationship: 0.025 mm ≦ L1 ≦ 1.5 mm, L1/4 ≦ R3 ≦ 2L1, 0.01 mm ≦ H4 ≦ R3. By adjusting the values of D1, θ, H3, L1, R3, and H4, the shape of the elongated V-shaped protrusions 666 and the elongated cylindrical protrusions 664 can be adjusted, thereby adjusting the brightness of the first optical plate 66. And the light perspective.
請參見圖8，所示為本發明實施例四之第一光學板86。第一光學板86包括一入光面860及一與入光面860相對之出光面862。出光面862上交替設置有相互平行之複數長條狀柱形凸起864及複數相互平行之長條狀V形凸起866。第一光學板86與第一光學板26具有相似之結構，其不同之處在於：入光面 860上還形成有相互平行之複數長條狀弧形凹槽863。長條狀弧形凹槽863之延伸方向平行於形成於出光面862上之複數長條狀柱形凸起864及複數長條狀V形凸起866之延伸方向。 Referring to FIG. 8, a first optical plate 86 according to a fourth embodiment of the present invention is shown. The first optical plate 86 includes a light incident surface 860 and a light exit surface 862 opposite to the light incident surface 860. The light-emitting surface 862 is alternately provided with a plurality of long strip-shaped columnar protrusions 864 and a plurality of parallel strip-shaped V-shaped protrusions 866 which are parallel to each other. The first optical plate 86 has a similar structure to the first optical plate 26, and the difference is that the light incident surface Further, a plurality of elongated arcuate grooves 863 which are parallel to each other are formed on the 860. The extending direction of the elongated arcuate groove 863 is parallel to the extending direction of the plurality of elongated cylindrical protrusions 864 and the plurality of elongated V-shaped protrusions 866 formed on the light-emitting surface 862.
出光面862之長條狀柱形凸起864及長條狀V形凸起866之相關參數與實施例三第一光學板66之出光面662之微結構之相關參數完全相同。 The relevant parameters of the elongated cylindrical protrusion 864 and the elongated V-shaped protrusion 866 of the light-emitting surface 862 are exactly the same as those of the microstructure of the light-emitting surface 662 of the first optical plate 66 of the third embodiment.
入光面860之長條狀弧形凹槽863之相關參數與實施例二第一光學板46之入光面460上之長條狀弧形凹槽463之相關參數完全相同。 The relevant parameters of the long arcuate groove 863 of the light incident surface 860 are exactly the same as those of the long arcuate groove 463 of the light incident surface 460 of the first optical plate 46 of the second embodiment.
第二光學板之表面微結構也可與第一光學板46、66、86之表面微結構完全相同。 The surface microstructure of the second optical plate may also be identical to the surface microstructure of the first optical plates 46, 66, 86.
第一光學板與第二光學板應用於照明裝置200時，二者之表面結構可不相同，例如：第一光學板採用實施例一之第一光學板26時，第二光學板則可採用與實施例二之第一光學板46相同之結構。但第一光學板之出光面之長條狀柱形凸起之延伸方向需垂直於第二光學板之出光面之長條狀柱形凸起之延伸方向。 When the first optical plate and the second optical plate are applied to the illumination device 200, the surface structures of the two may be different. For example, when the first optical plate adopts the first optical plate 26 of the first embodiment, the second optical plate may be used with The first optical plate 46 of the second embodiment has the same structure. However, the extending direction of the elongated cylindrical protrusion of the light-emitting surface of the first optical plate is perpendicular to the extending direction of the elongated cylindrical protrusion of the light-emitting surface of the second optical plate.
實際應用時，第一光學板或第二光學板之入光面之長條狀弧形凹槽有助於將入射光線擴散均勻。第一光學板或第二光學板之出光面上交替設置之相互平行之複數長條狀柱形凸起及複數相互平行之長條狀V形凸起可使光線發生特定之折射、散射、反射與繞射等光學作用。 In practical applications, the long arc-shaped grooves of the light-incident surface of the first optical plate or the second optical plate help to spread the incident light uniformly. The plurality of elongated columnar protrusions and the plurality of parallel strip-shaped V-shaped protrusions which are alternately arranged on the light-emitting surface of the first optical plate or the second optical plate may cause specific refraction, scattering and reflection of the light. Optical effects such as diffraction.
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出光面之特殊微結構使光線發生特定之折射、散射、反射與繞射等光學作用，從而使光線擴散並向特定視角範圍內聚集，形成亮度均勻之面光源。 It can be understood that the second optical plate can also be omitted, and the illumination device 200 can utilize the special microstructure of the light-emitting surface of the first optical plate to cause specific optical refraction, scattering, reflection, and diffraction to cause the light to diffuse and diffuse. Aggregate within a specific viewing angle to form a uniform light source with uniform brightness.
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內。 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 spirit of the invention are intended to be included within the scope of the following claims.
200‧‧‧照明裝置 200‧‧‧Lighting device
22‧‧‧燈箱 22‧‧‧Lightbox
24‧‧‧發光二極體 24‧‧‧Lighting diode
26‧‧‧第一光學板 26‧‧‧First optical board
28‧‧‧第二光學板 28‧‧‧Second optical plate
31‧‧‧第一擴散空間 31‧‧‧First diffusion space
32‧‧‧第二擴散空間 32‧‧‧Second diffusion space
Claims (13)
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| TW97140848A TWI404892B (en) | 2008-10-24 | 2008-10-24 | Illumination device |
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| TW97140848A TWI404892B (en) | 2008-10-24 | 2008-10-24 | Illumination device |
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| TW201017058A TW201017058A (en) | 2010-05-01 |
| TWI404892B true TWI404892B (en) | 2013-08-11 |
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| TWI254176B (en) * | 1999-09-29 | 2006-05-01 | Sanyo Electric Co | Surface light source device |
| TWI226480B (en) * | 2001-07-27 | 2005-01-11 | Enplas Corp | Surface light source equipment, image display, and light guide plate |
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