201233949 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種例如使用LED光源之發光板。 【先前技術】 將發光二極體（LED)利用為其光源的光輸出裝置已變得 . 越來越流行。此等光輸出裝置可用於物件照明，用於顯示 一影像’或僅用於裝飾的目的。 LED係藉由將一 LED晶片的n型半導體區域及p型半導體 區域連接至各自的終端接腳以汲取電流而製造。該1£〇晶 片嵌入一封裝中，例如一樹脂之封裝。該封裝可經配置使 得來自該LED晶片的光以一個或多個指定方向發射。 LED具有一小外觀尺寸，其使得形成薄且多用途的設 計。一實例係一發光板，其可放置於一表面上，或與一表 面整合。一發光板例如具有一嵌入式LED或一嵌入式 陣列。該等LED在該板内其等之位置處發射光。 該等LED之小外觀尺寸轉化為非常高的亮度，例如，超 過 106 cd/m2。 ° 因此，具冑LED整合陣列的發光板的一問題在於該板在 该等LED處具有局部高強度區域。個別LED可產生眩光以 及非期望的陰影效應。在許多應用中，期望跨板區域獲得 一較均句的光輸出強度，例如使LED光輸出散佈在1 J2至 1〇 cm2的一較大面積上。次級光學器件(諸如光擴散層或散 射表面）可使用於此目的。 一發光板之另一實例使用一光腔以散佈光，且藉此產生 1599I5.doc 201233949 一較均勻的輸出。光腔例如使用於LCD的背光單元中，其 中輸出之均勻度特別重要。此一腔可呈一箔之形式其由 邊緣安裝型LED予以照明。 此類型之箔的一實例為PMMA(聚（甲基丙烯酸曱酯），透 明熱塑性）波導，有時稱為光外皮（light skin)。光係藉由全 内反射而捕獲於波導内，且光出耦合（Hght 〇ut c()upling) 結構用於在光輸出表面產生均勻照明。此等光出耦合結構 提供折射率上的一變化或光之角度上的一變化，以便中斷 全内反射。例如此等光出耦合結構可包括光散射區域。該 等出耦合區域參考LED位置而配置-例如遠離該等LED緊密 地配置在一起，因為強度較低，使得需要更多光輸出區域 以達成光輸出表面之區域上的一均勻強度。 圖1展示一 PMMA波導發光板，且展示邊緣耦合型led ι〇(例如，紅色、綠色及藍色）、波導12及光出耦合結構14 之不規則圖案。該圖案經精確計算以確保一良好均勻度。 該波導例如為1 mm厚。 圖2以橫截面展示圖1之結構。 光出耦合結構可採用多種形式，諸如散射塗料點、微凹 槽、微棱鏡、微透鏡、具有表面粗糙度的部位、磷光體 點。 發光板的一應用係一所謂「透射性發射視窗」，其係透 明的，且因此可形成一視窗的部分（或提供於一視窗上）， 且亦係發射性的’且可因此用於照明。因此將光外皮使用 為一鑲嵌玻璃材料（glazing material)(一般在一基板，諸如 159915.doc 201233949 玻璃上）。 本發明主要探討製造呈一板之形式的一低成本通用照明 系統的問題，該板具有一按量度切割（cut to measure)架 構° 一光導可提供分佈來自LED之光的一低成本方式，但 挑戰即變為如何製造按量度切割的光導。 已知的設計具有如上文所解釋取決於LED之位置的出耦 合結構，而此妨礙將一較大的板切割成一定尺寸，使得該 板的剩餘部分可用於另一應用。 【發明内容】 根據本發明’提供一種照明系統，其包括： 一光導’其包括一光導材料板； 一陣列之光出耦合結構，其用於安裝於該光導材料板的 一表面處；及 至少一 LED模組’其用於安裝於該光導材料板的一邊緣 處，以將光引導至該板中， 其中該陣列之光出耦合結構包括施覆至該板的一貼紙。 藉由將該等光出耦合結構形成為一貼紙，該系統需要定 製之部分的成本保持為一最小值。該光導材料板可為一通 用板，其對於該等光出耦合結構沒有特殊設計。 該光導材料板可包括例如PMMA、聚碳酸酯或玻璃。 该等光出耦合結構可以在該貼紙之中央附近比在該貼紙 之邊緣附近更為密集之一圖案而配置。對於一邊緣發光系 統’此増加在距光源較大距離處的照明面積，且旨在確保 從表面出搞合的光具有一大體上均勻的光強度分佈。 159915.doc 201233949 中央的至少 中央轴與該 緣的邊緣照 導材料板且 一鏡面對稱 割。換句話 等光出耗合 之貼紙相對 2等光出Μ結構可q目對於通過該貼紙之 :轴成鏡面對稱的—圖案而配置。在該貼紙之 之中央軸對準之情況下，若存在來自相對邊 明’則此提供—均勻光輪出。 在、且裝該，系明系統之前該貼紙可大於該光 -有n、中央之(該等光出耦合結構之)至少 軸’且該貼紙係用於以維持該中央的一方式切 說，當將該貼紙切割減小至—定的尺寸時，該 、’口構之中央對稱軸維持於中央。此意指所施覆 於該板對稱。 或者，在組裝該照明系統之前，該貼紙包括一第一貼紙 部分及一第二貼紙部分，該第一貼紙部分及該第二貼紙部 刀S在起大於s亥光導材料板，且該等貼紙部分係用於以 維持一邊緣為完整的一方式切割。接著可使兩個貼紙部分 之元整邊緣鄰接以形成中央貼紙轴。此提供一更容易的切 割操作。 當組裝時’該貼紙係安裝於該光導材料板之表面處，且 5亥LED模組係安裝於該光導材料板之一邊緣處，以將光引 導至該板中》 本發明亦提供一種組態一照明系統的方法，其包括： 切割一貼纸，該貼紙包括一陣列之光出耦合結構； 將該切割之貼紙安裝於一光導材料板之一表面處；及 將至少一 LED模組安裝於該光導材料板之一邊緣處，以 將光引導至該板中。 159915.doc • 6 - 201233949 【實施方式】 現將參考附圖詳細描述本發明之實例。 本發明提供一照明系統，其具有：一光導，該光導包括 一光導材料板；及一陣列之光出耦合結構’其形成於該光 導材料板之一表面處。該板係邊緣發光的。該陣列之光出 耦合結構經形成為一貼紙，且可在施覆至該光導材料板之 前切割減小至一定的尺寸。 圖3展示本發明之照明系統的一第一實例。 该照明系統30包括一透射性發射視窗3〇，其包括放置於 鑲嵌玻璃31之邊緣處的LED 32，使得1^1)光33耦合至玻璃 視窗3 1中。 該光係藉由全内反射而捕集於鑲嵌玻璃31中。 一貼紙層35包括出叙合結構34的一圖案。 較佳地’以一使得可獲得一均勻光發射的方式使LED光 33從該視窗出耦合，以此一方式選擇出耦合結構34之圖 案。 該貼紙35包括與一橡膠/塑膠層（乙烯、聚矽氧橡膠、 PP PE或另一塑膠）組合的一黏著層（例如，丙烯酸）。本 技術中貼紙係已知的’本技術中視窗貼紙亦係已知的。可 使用習知透明視窗貼紙材料。 s亥等光出搞合結構可採用與已知光導中相同的形式，諸 如散射塗料點、微凹槽、微稜鏡、微透鏡、具有表面粗糙 度的部位、磷光體點。 該貼紙較佳地為一單一自黏著層（即，具有預先施覆的 159915.doc 201233949 黏著劑广但代替地其可包括具有該等出輕合結構的一背 二Γ及一分離之透明黏著層。該黏著層接著可作為-固 層或作為-黏性液體而施覆。若使用—分離之黏著層， 其可在施㈣f襯層之前噴塗或刷线光導板處。 在圖3之實例中，該鑲嵌玻璃從兩個相對邊緣予以照 明。此意指光出耗合結構之圖案具有在此等邊緣之間的一 對㈣。如所展示，該等光出輕合結構在中央附近具有較 大密度。 光出耦合結構之期望圖案可以多種方式形成。 圖4展示一單一貼紙35之一實例，其大於板3!，該貼紙 35將裝配至該板3 !。存在光出輕合結構％的一圖案其係 針對左側及右側處的邊緣照明而設計。因此該等結構之密 度朝向左邊緣及右邊緣減小，而在垂直方向上係均句的。 該貼紙具有通過巾央之該等結構34之—鏡面對稱線。 為將㈣紙35切割成一定的尺寸’該對稱線保持在中 央，使得其保持與該板31之一對稱線對準，如圖4中所展 示0 在該貼紙中央軸40與該板之中央軸對準之情況下，若存 在來自相對邊緣之邊緣照明，則此提供一均勻光輸出。 或者，如圖5中所展示，在組裝該照明系統之前，該貼 紙可包括一第一貼紙部分35a及一第二貼紙部分35b，其等 合在一起大於該光導材料板31。 該等貼紙部分係用於以維持一邊緣42為完整的一方式切 割。接著可使兩個貼紙部分之完整邊緣鄰接，以形成中央 159915.doc -8 - 201233949 貼紙轴。 在另一實例中，維持完整的邊緣在貼紙之另-側上， 即，在外側上，而不在該板31之中央上。該等貼紙部分仍 然在中央結合，且㈣邊緣彼此鄰接。此可用於提供—較 低密度之光_合位點（site)(因為高密度中央區域接著已 被切割），但其意指該等切割邊緣將在該板之可見部分 中。 兩塊貼紙提供維持期望之對稱性的一更容易的切割操 作。 ’、 該等個別貼紙部分並不提供所需要的對稱性（儘管其等 在自上而下的方向上對稱）。待提供於該板31上之出耦合 圖案’、有對稱圖案，且此僅當兩個貼紙部分鄰接在—起 時形成。兩個貼紙部分之鄰接_2在該期望之出耦合圖 案之對稱軸處。 在此情況中，兩個貼紙將被施覆至視窗，且該等貼紙將 在該視窗之中間、在該出耦合圖案之該對稱轴處結合。此 更易於切割。 該光導材料板可包括高度透射性玻璃，諸如石英，或塑 膠，諸如PMMA。 在上文之實例中，照明係在該板之兩個相對邊緣上。此 意指該圖案在此等邊緣之間係不規則的，且具有在該等邊 緣之間的一鏡面對稱線。照明可來自全部四個邊緣，在此 情況中該圖案將具有兩個鏡面對稱線，且在兩個方向上為 不規則的。或者，照明可僅在一側上，在此情況中，在圖 159915.doc 201233949 案中將不存在垂直於該一側的對稱性。 熟習此項技術者在實踐所主張之發明時可從圖式、揭示 内谷及隨附_請專利範圍之研究中理解及實現對所揭示之 實施例的其他變動。在請求項中，詞語「包括」不排除其 他7G件或步驟，且不定冠詞「一（"a"或"an")」不排除複數 個。某些措施敘述在相互不同的從屬請求項中，但僅就此 事實，並不表示此等措施之組合不能利用以更具有優越 性。凊求項中的任意參考標記不應解譯為限制範圍。 【圖式簡單說明】 圖1以透視圖展示一已知發光板； 圖2以橫截面展示圖1之發光板； 圖3展示本發明之照明系統的一實例； 圖4展示一第一貼紙設計；及 圖5展示一第二貼紙設計。 【主要元件符號說明】 10 邊緣耦合型發光二極體 12 波導 14 光出耦合結構 30 照明系統/透射性發射視窗 31 光導/鑲嵌玻璃/玻璃視窗/光導材料板 32 發光二極體模組/led 33 LED光 34 光出耦合結構 35 貼紙/貼紙層 159915.doc -10- 201233949 35a 35b 40 42 第一貼紙部分 第二貼紙部分 鏡面對稱軸/鏡面對稱線/貼紙中央軸 邊緣201233949 6. DISCLOSURE OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to a luminescent panel such as an LED light source. [Prior Art] A light output device using a light emitting diode (LED) as its light source has become more and more popular. These light output devices can be used for object illumination for displaying an image' or for decorative purposes only. The LED is fabricated by connecting an n-type semiconductor region and a p-type semiconductor region of an LED chip to respective terminal pins to draw current. The 1 〇 wafer is embedded in a package, such as a resin package. The package can be configured to emit light from the LED wafer in one or more specified directions. LEDs have a small external size that allows for a thin and versatile design. An example is a luminescent panel that can be placed on a surface or integrated with a surface. A luminescent panel has, for example, an embedded LED or an embedded array. The LEDs emit light at their locations within the panel. The small size of these LEDs translates to very high brightness, for example, over 106 cd/m2. Thus, one problem with illuminating panels with LED integrated arrays is that the panels have locally high intensity regions at the LEDs. Individual LEDs can produce glare and undesired shadow effects. In many applications, it is desirable to obtain a lighter output intensity of the more uniform sentence across the panel area, such as by spreading the LED light output over a larger area of 1 J2 to 1 〇 cm2. Secondary optics such as a light diffusing layer or a scattering surface can be used for this purpose. Another example of a luminescent panel uses an optical cavity to distribute light and thereby produce a more uniform output of 1599I5.doc 201233949. The optical cavity is used, for example, in a backlight unit of an LCD, and the uniformity of the output thereof is particularly important. This cavity may be in the form of a foil that is illuminated by edge mounted LEDs. An example of this type of foil is PMMA (poly(methacrylate), transparent thermoplastic) waveguide, sometimes referred to as a light skin. The light system is captured within the waveguide by total internal reflection, and a light out coupling (Hght 〇 ut c()upling) structure is used to produce uniform illumination on the light output surface. These optical outcoupling structures provide a change in refractive index or a change in the angle of light to interrupt total internal reflection. For example, such light outcoupling structures can include light scattering regions. The outcoupling regions are configured with reference to the LED locations - for example, closely spaced away from the LEDs because of the lower intensity, requiring more light output regions to achieve a uniform intensity over the area of the light output surface. 1 shows a PMMA waveguide illuminating panel and shows an irregular pattern of edge-coupled led 〇 (eg, red, green, and blue), waveguide 12, and light out-coupling structure 14. The pattern is accurately calculated to ensure a good uniformity. The waveguide is, for example, 1 mm thick. Figure 2 shows the structure of Figure 1 in cross section. The light outcoupling structure can take a variety of forms, such as scattering paint dots, micro-pits, microprisms, microlenses, locations with surface roughness, phosphor dots. One application of the illuminating panel is a so-called "transmissive emission window" which is transparent and thus forms part of a window (or is provided on a window) and is also emissive and can therefore be used for illumination . The outer skin is therefore used as a glazing material (typically on a substrate such as 159915.doc 201233949 glass). The present invention is primarily concerned with the problem of manufacturing a low cost general illumination system in the form of a panel having a cut to measure architecture. A light guide provides a low cost way of distributing light from the LED, but The challenge is how to make a light guide that is cut by measurement. Known designs have an outcoupling structure that depends on the position of the LED as explained above, which prevents a larger panel from being cut to size such that the remainder of the panel can be used for another application. SUMMARY OF THE INVENTION According to the present invention, there is provided an illumination system comprising: a light guide comprising a sheet of light-guiding material; an array of light-out coupling structures for mounting at a surface of the sheet of light-guiding material; and at least An LED module is mounted for mounting at an edge of the sheet of light-guiding material to direct light into the panel, wherein the light-coupled structure of the array includes a sticker applied to the panel. By forming the optical outcoupling structures into a sticker, the cost of the portion of the system that needs to be customized is kept to a minimum. The sheet of photoconductive material can be a general purpose plate that is not specifically designed for such optical outcoupling structures. The sheet of light-guiding material may comprise, for example, PMMA, polycarbonate or glass. The light outcoupling structures may be arranged near the center of the sticker in a pattern that is denser than near the edge of the sticker. For an edge illumination system, this is added to the illumination area at a greater distance from the source and is intended to ensure that the light that fits out of the surface has a substantially uniform distribution of light intensity. 159915.doc 201233949 At least the central axis of the center and the edge of the edge of the material plate are mirror-symmetrically cut. In other words, the sticker of the light-emission and the like can be arranged with respect to the pattern through which the axis is mirror-symmetrical. In the case where the central axis of the sticker is aligned, if there is a relative edge, then this is provided - uniform light rotation. The sticker may be larger than the light--n, central (the light-coupled structure) at least the axis' and the sticker is used to maintain the center, and When the sticker is cut to a predetermined size, the central axis of symmetry of the 'mouth structure' is maintained at the center. This means that the plate is symmetrical. Or, before assembling the lighting system, the sticker includes a first sticker portion and a second sticker portion, the first sticker portion and the second sticker portion knife S are greater than shai light guide material plate, and the stickers Part of it is used to cut in such a way as to maintain one edge intact. The edges of the two sticker portions can then be abutted to form a central sticker axis. This provides an easier cutting operation. When assembled, the sticker is mounted on the surface of the photoconductive material sheet, and the 5H LED module is mounted on one edge of the photoconductive material sheet to guide light into the panel. The present invention also provides a group. A method of illuminating a system, comprising: cutting a sticker, the sticker comprising an array of light outcoupling structures; mounting the cut sticker on a surface of a light guide material; and mounting at least one LED module At one edge of the sheet of photoconductive material to direct light into the panel. 159915.doc • 6 - 201233949 [Embodiment] An example of the present invention will now be described in detail with reference to the accompanying drawings. The present invention provides an illumination system having: a light guide comprising a sheet of light-guiding material; and an array of light-emitting coupling structures formed at one surface of the sheet of light-guiding material. The plate is illuminated at the edges. The light outcoupling structure of the array is formed as a sticker and can be cut to a certain size before being applied to the sheet of photoconductive material. Figure 3 shows a first example of a lighting system of the present invention. The illumination system 30 includes a transmissive emission window 3 that includes LEDs 32 placed at the edges of the inlaid glass 31 such that the light 33 is coupled into the glass window 31. This light system is trapped in the inlaid glass 31 by total internal reflection. A sticker layer 35 includes a pattern of the compositing structure 34. The pattern of the coupling structure 34 is preferably selected in such a manner that the LED light 33 is outcoupled from the window in such a manner that a uniform light emission is obtained. The sticker 35 includes an adhesive layer (e.g., acrylic) in combination with a rubber/plastic layer (ethylene, polyoxyethylene rubber, PP PE, or another plastic). Stickers are known in the art. The window stickers of the present technology are also known. A conventional transparent window sticker material can be used. The light-emitting structure of shai can be used in the same form as in known light guides, such as scattering paint dots, micro-grooves, micro-twisters, microlenses, portions having surface roughness, and phosphor dots. The sticker is preferably a single self-adhesive layer (ie, having a pre-applied 159915.doc 201233949 adhesive widely but instead may include a backing and a separate transparent adhesive with the light-weight structure) The adhesive layer can then be applied as a solid layer or as a viscous liquid. If a separate adhesive layer is used, it can be sprayed or brushed at the light guide before applying the (iv) f lining. The inlaid glass is illuminated from two opposite edges. This means that the pattern of the light-out consuming structure has a pair (four) between the edges. As shown, the light-emitting structures have a central vicinity Larger density. The desired pattern of the light outcoupling structure can be formed in a variety of ways. Figure 4 shows an example of a single sticker 35 that is larger than the panel 3!, the sticker 35 will be assembled to the panel 3! A pattern of % is designed for edge illumination at the left and right sides. Therefore, the density of the structures decreases toward the left and right edges, and is uniform in the vertical direction. Structure 34 Mirror symmetry line. To cut the (four) paper 35 into a certain size 'the symmetry line is kept in the center so that it remains aligned with the symmetry line of one of the plates 31, as shown in Figure 4 at the center axis 40 of the sticker Where the central axis of the panel is aligned, if there is edge illumination from the opposite edge, this provides a uniform light output. Alternatively, as shown in Figure 5, the sticker may include a A sticker portion 35a and a second sticker portion 35b, which are joined together, are larger than the light guide material sheet 31. The sticker portions are used to cut in a manner that maintains an edge 42 as complete. The full edges abut to form a central 159915.doc -8 - 201233949 sticker axis. In another example, the full edge is maintained on the other side of the sticker, ie on the outside, not on the center of the plate 31. The sticker portions are still centered and (4) the edges are adjacent to each other. This can be used to provide a lower density light_site (since the high density central area has been cut), but it means The cutting edge will be in the visible portion of the panel. The two stickers provide an easier cutting operation that maintains the desired symmetry. 'These individual sticker sections do not provide the required symmetry (although they are The lower direction is symmetrical. The out-coupling pattern 'to be provided on the board 31' has a symmetrical pattern, and this is formed only when the two sticker portions are adjacent to each other. The two adjacent portions of the sticker portion are in the It is desirable to have the axis of symmetry of the coupling pattern. In this case, two stickers will be applied to the window, and the stickers will be joined in the middle of the window at the axis of symmetry of the outcoupling pattern. The sheet of photoconductive material may comprise a highly transmissive glass such as quartz, or a plastic such as PMMA. In the above examples, the illumination is on two opposite edges of the panel. This means that the pattern is irregular between the edges and has a mirror symmetry line between the edges. The illumination can come from all four edges, in which case the pattern will have two specular symmetry lines and be irregular in both directions. Alternatively, the illumination may be on only one side, in which case there will be no symmetry perpendicular to the side in Figure 159915.doc 201233949. Other variations to the disclosed embodiments can be understood and effected by those skilled in the <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; In the request, the word "include" does not exclude other 7G pieces or steps, and the indefinite article "一("a" or "an")" does not exclude plural. Some measures are described in mutually different subordinate claims, but only in this fact does not mean that the combination of these measures cannot be utilized to be more advantageous. Any reference mark in the request item should not be interpreted as a restricted range. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a known illuminating panel in a perspective view; Fig. 2 shows the illuminating panel of Fig. 1 in cross section; Fig. 3 shows an example of the illuminating system of the present invention; Fig. 4 shows a first sticker design And Figure 5 shows a second sticker design. [Main component symbol description] 10 Edge-coupled light-emitting diode 12 Waveguide 14 Light-out coupling structure 30 Illumination system / Transmissive emission window 31 Light guide / mosaic glass / glass window / light guide material plate 32 Light-emitting diode module / led 33 LED light 34 light out coupling structure 35 sticker/sticker layer 159915.doc -10- 201233949 35a 35b 40 42 First sticker part second sticker part mirror symmetry axis / mirror symmetry line / sticker central axis edge
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