201232070 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光源的發光片。 【先前技術】 利用發光二極體（LED)作為其光源之光輸出裝置已變得 愈來愈流行。此等光輸出裝置可用於物件之照明、用於一 影像之顯示或簡單地用於裝飾目的。 LED係藉由將一LED晶片之n型半導體區及p型半導體區 連接至用於沒取電流之各別端子接針而製成。將該LEd晶 片嵌入於（例如）一樹脂之一封裝中。該封裝可經配置使得 來自LED晶片之光沿一或多個指定方向發射。 LED具有使能夠形成薄且多變設計之一小外觀尺寸。一 個實例係可放置於一表面上方或與一表面整合之一發光 片。舉例而言，一發光片具備一嵌入式lED或一嵌入式 LED陣列。該等LED在其位於該片内之位置處發射光。 led之小外觀尺寸轉變為極高亮度，舉例而言超過1〇6 cd/m2。 因此，整合有LED陣列之發光片之一問題係該片在該等 LED處具有局部高強度區。個別㈣可產生眩光以及不需 要之陰影效應。在諸多應用中，期望獲得跨越該片之面積 之一更均勻光輸出強度，舉例而言將LED光輸出擴散於（例 汝）1 cm至1 〇 cm之一較大面積上。出於此目的，可使用 辅助光學器件，諸如光漫射層或散射表面。 一發光片之另一實例使用一光腔來擴散光且藉此產生一 159948.doc 201232070 光腔係用於輸出之均勻性係特別 。此一腔可係呈一荡之形式，該 更均勻輸出。舉例而言， 重要之LCD之背光單元中 腔由邊緣安裝式LED照明 此類型U之一個實例係一 pmma(聚（甲基丙稀酸甲 醋）一透明熱塑膠）波導，有時稱為-光表層。藉由全内反 射在波導内捕獲光，且使用光輸出耦合結構來在光輸出表 面處產生均勻照明。此等光輸出耦合結構提供折射率之一 改變或該光之角度之-改變，例如以便中斷全内反射。舉 例而言’其可包括光散射區。參照led位置來配置輸出耦 合區域-舉例而言，由於強度較低因此離得led越遠配置的 越密集，使得在光輸出表面之面積上達成一均勻強度需要 更多光輸出區域。 圖1展示一PMMA波導發光片，且展示邊緣耦合式LED 1 〇(例如紅色、綠色及藍色）、波導丨2及光輸出耦合結構工4 之不規則圖案。該圖案經精確地計算以確保一良好均勻 性。舉例而言，該波導係1 mm厚。 圓2以剖面形式展示圖1之結構。 光輸出耦合結構可採取各種形式，諸如散射漆點、微凹 槽、微稜鏡、微透鏡、具有表面粗糙度之域、磷光體點。 發光片之一個應用係一所謂「透射發射窗」，該透射發 射窗係透明的且因此可形成一窗之部分（或提供於一窗上 方），但亦係發射的且可因此用於照明。光表層因此用作 一上釉材料（通常在諸如玻璃之一基板上方）。 【發明内容】 J59948.doc 201232070 本發明係針對以按尺寸切割架構（cut_t〇_measure architecture)製作呈—Η 』 片形式之一低成本一般照明系統的 問題。-光導可提供用以分佈來自咖之光之一低成本方 式，但挑戰因而變成如何按尺寸切割地製作光導。 如上文所闡釋’已知設計具有取決於咖之位置之輸出 耦口、。構且此防止按大小切割一較大片，從而使得該片 之剩餘部分可用於另一應用。 根據本發明，提供-種照明系統，其包括：一光導，其 包括-光導引材料片及在該光導引材料片之一表面處形成 為規則圖案之丨輸出耗合結構陣列；及至少一個 模組’其錢㈣光㈣材料丨之該表面上㈣於將光導 引至該片中。 此设計使得能夠形成一種包含LED及一光導之一般照明 系統。該光導包括並非跨越該光導全域變化之一規則(亦 即，週期性）輸出耦合結構（不過其可包括一重複局部圖 案）。該等LED提供為欲安裝於該光導上（例如放置於該光 導上之任何地方）之單獨組件。規則圖案意指可在不參照 LED光源之數目或定位之情形下按大小切割該光導。 照明系統在接近LED之位置處給予光輸出，其中來自 LED之光係分佈於光導中。發光區域之確切形狀可藉由設 計LED模組之角度發射分佈來選擇。 光導引材料片可包括PMMA、玻璃或聚碳酸酯。因此， 可使用已知光導引材料，且本發明並不對欲使用之材料施 加任何不尋常要求。類似地，可使用已知光輸出耦合結 159948.doc 201232070 構’諸如散射漆點、微凹槽、微稜鏡、微透鏡、具有表面 粗糙度之域、鱗光體點。 LED模組可包括用於遠離垂直於該片之一方向在一角度 $巳圍内導引光輸出之構件。此幫助將光耦合至光導中。 LED模組可包括用於在—橫向角度範圍内導引光輸出之構 件。此可用以控制形成怎樣的光輸出，且藉此規定lEd模 組相對於光輸出耦合結構圖案之所期望定位。 較佳地提供藉由一透明導電片或藉由極薄不醒目導線電 互連之複數個LED模組。 該圖案可在該片之表面之兩個維度上得、規則的，且在每 一光輸出耦合結構處重複。此意指LED模組可放置於片上 之任何地方且可以任何數目放置，乃因該圖案不具有鏈接 至LED模組之特徵。 而疋’ 4圖案可在該片之表面之兩個維度上同樣係規則 的’但其可在光輸出耦合結構之子集之層級上重複。因 ，，光輸_合結構之—子集可經設計具有⑽之一特定 女裝位置以用於將光最佳地耦合至光導中。 較佳地提供在LED模組與光導之間形成光學接觸之一黏 明系統之方法，其包括： 一昭 本發明亦提供一種組態 將一光導切割至—你甘B #丄， 〜 斤期望大小，該光導包括-光導引 料片及在該光導引材料片之一 表面處形成為一規則圖案 —光輸出耦合結構陣列；及 將至少一個LED模組安裝於嗜氺 女装於。亥先導引材料片之該表面 159948.doc 201232070 以用於將光導引至該片中。 【實施方式】 現將參照附圖詳細地闡述本發明之實例。 本發明提供-照明系統，其具有—光導’該光導包括一 光導引材料片及在該光導引材料片之一表面上形成為一規 則圖案之-光輸_合結構陣列。至少—個led模植係安 裝於該光導引材料片之該表面上以用於將光㈣至該片 中。此配置自上方將光麵合至該片中，且此意指不像邊緣 光配置那樣需要光輸出麵合結構之_特錢案。該規則圖 案意指可按大小來切㈣片且該片之剩餘部分可用於其他 照明系統。 圖3展示本發明之照明系統之一第一實例。 一般照明系統30包含LED 32及一光導31。光導3ι包括並 不跨越光導31變化之-週期性光輸出麵合結構35，且咖 32提供為一 LED模組33之部分。 可使用一黏合劑38將LED模組33放置於光導31上之任一 地方，以在LED模組33與光導31之間形成光學接觸。 當已施加LED模組33時，LED光34將耦合至光導31中且 將使用輸出輕合結構35耗合輸出，舉例而言如位置％處所 指示。 所得光效應在於一單個LED之明亮LED發射分佈於一較 大面積上，從而將眩光減少至LED發射變得適合用作一般 照明之一位準。 在此貫例中，自led擴散之光之圖案係圍繞LED之位置 159948.doc 201232070 對稱。如所展示，光輸出耦合結構之間距可小於LED模組 之大小，使得LED模組之定位並非關鍵的_不論將LED定位 在何處，圍繞其之光輸出耦合結構之圖案將係實質上相同 的。 L E D模組經設計使得光在L E D模組與該片之表面之間之 界面處不反射。因此，光被麵合至該月中。 光輸出耦合結構可致使來自LED模組之某些光反射回至 LED模組中，其中該光將部分地被吸收（大約4〇%)且部分 地再一次反射回。然而，所吸收之光將藉由光再循環機構 部分地重新發射（大約60%)。因此，光輸出耦合結構防止 自LED模組至光導之完美耦合之事實並未顯著地減小效 率’光輸出輕合結構亦佔據一相對小面積。 由於光輸出耦合結構之圖案係完全規則的，因此該片可 用於任何數目個LED模組及LED模組之任何位置。 該規則圖案不具有空間非均勻性或對其圖案之空間相依 性。此揭露使用新光輸出耦合機構不能提供如先前所需要 之非均勻圖案之可能性。舉例而言，該圖案可包括以一 極低密度提供散射粒子之一均句施加之光漆。藉由將此漆 施加至光導，漆層充當一均勻輸出耦合層。 另一實例係包括磷光體粒子（諸如有機磷光體）之一漆。 藉由施加此一漆之—薄層，同樣提供一均勻輸出耦合層。 在此等配置中，圍繞LED模組之光圖案之強度將係越接 近LED模組越大，因為更靠近光源。 替代地，該圖案可具有針對個別LED模組的一局部設 159948.doc 201232070 1·舉例而吕，離得越遠輪出耗合結構越緊密。因此，該 圖案可在光輸出耦合結構之—子陣列之層級上而非在個別 ^輪出輕α結構之層級上重複。此需要—規則圖案，但不 需要完美肖句的一個規則目案-換言之，該規則性並非在 一個別光輸出耦合結構之層級上。 然後’該LED模組具有相對於彼局冑設計之一較佳附接 ‘·" b亦了思扣led模組應理想地放置於該經切割片之每 所。又片附接點處，但此並非必不可少的。 為將光有效率地耦合至光導中，應最佳化由LED模組33 發射之LED光之角度分佈。較佳地，LED模組僅以較大角 度（亦即，遠離方向）發射光，乃因此等角度在光導中捕 獲。應朝向此等較大角度重新引導原本在較小角度下正常 發射之LED光。 可以如下數種方式來完成重新引導LED光以最佳化角度 分佈： -反射鏡、透鏡及/或障礙物； -干涉塗層； -一向後反射器層（其以小角度有效率地反射光，但以較大 角度透射光）。 此等措施之目的係遠離垂直於該片之一方向在一角度範 圍内引導LED模組之光輸出。 對熟習此項技術者而言用於實施此操作之光學措施將係 例行措施。舉例而言，可設計一干涉塗層，其反射以小角 度發射之光且使以大角度發射之光通過。此特別適用於藍 159948.doc 201232070 色或近-UV LED，其中藉由一填光體將輸入搞合之光之部 分轉換至光譜之另一部分。相同方法可應用於所有紅色、 綠色及藍色LED ’其中每一 LED具有其自己的特別設計之 干涉濾光器。 LED模組亦可經設計以在一橫向角度範圍内引導光輸 出。以此方式，使用一預定義LED角度分佈來使得光輸出 在空間上均勻。 特定而言，LED模組可具有一角度發射分佈，以便在空 間上均勻地照明週期性輸出耦合結構之某一預定區域。舉 例而言’此角度分佈可與一所謂「蝙蝠翼」分佈相似。預 定經照明區域可具有一規則幾何形狀，使得表面之全瓦鋪 係可能的。圖4中給出此一經照明區域之某些實例。 圖4中之平面視圖展示在一三角形區域之中心處之一 LED模組40 ’其中多個三角形形成一柵格。模組42處於一 正方形區域之一個拐角處，其_該等正方形形成一柵格。 模組44處於一正方形區域之中心處，其中該等正方形形成 一柵格；且模組46處於一六邊形區域之中心處，其中該等 六邊形形成一柵格。 圖4中之剖面展示藉由控制沿不同方向之強度（由箭頭48 之長度表示）產生此角度光圖案。因此，在穿過該片之剖 面中’存在一 180度的角度範圍。藉由控制沿不同方向之 強度’照明光輪出耦合結構之範圍以及相對強度得以控 制。藉由使強度圖案以不同角度圍繞LED模組，經照明區 域之外部形狀得以控制。 159948.doc 201232070 最終使用者可選擇藉由在每-區域處放置-LED模組來 …月王表面’或可藉由將該等LED放置成—特定網格來 獲得一定製照明圖案。 “等LED在光導上之放置仍係自由的，乃因光抽取圖案 可保持均勻。對角度分佈之控制係LED模組設計之部分。 可藉由如_L文所闡述之—特別設計4干涉塗層來控制橫 向角度圖案。紅色、綠色、藍色及近UV LED需要其自己 的被調譜至特定波長之設計。另—實例係不需要 方向行進之光閘，舉例而言，薄片或光圈。 可使用極薄導電線（但較佳地使用一透明導電材料，諸 如提供於可黏附至光導之—透明載體上之IT〇)來達成至 LED模組之電力供應。 舉例而言，圖5展示包括兩個LED 32及一經圖案化透明 導電塗層39之一 LED模組。 藉由使用均勻之一光抽取圖案，可隨意地放置LED模 組，且可按尺寸切割光導。 根據對各圖式、揭示内容及隨附申請專利範圍之研究， 热％此項技術者可在實踐所±張之發明中理解及實現所揭 不貫施例之其他變化形式。在申請專利範圍中，措辭「包 括」（comprising)並不排除其他元件或步驟，且不定冠詞 「一」（a)或「一」（an)並不排除複數。在互不相同之附屬 請求項t陳述某些措施之此一事實並不指示不能有利地組 合使用此等措施。中請專利範圍中之任何參考符號皆不應 解釋為限制該範疇。 159948.doc 201232070 【圖式簡單說明】 圖1以透視圖形式展示一已知發光片； 圖2以剖面形式展示圖1之發光片； 圖3展示本發明之照明系統之一第一實例； 圖4展示本發明之照明系統之一第二實例；及 圖5展示本發明之照明系統之一第三實例。 【主要元件符號說明】 10 邊緣耦合式發光二極體 12 波導 14 光輸出耦合結構 30 照明系統 31 光導 32 發光二極體 33 發光二極體模組 34 發光二極體光 35 光輸出耦合結構 36 位置 38 黏合劑 39 經圖案化透明導電塗層 40 發光二極體模組 42 模組 44 模組 46 模組 48 箭頭 159948.doc -12-201232070 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a light-emitting sheet using, for example, 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 illumination of objects, for display of an image or simply for decorative purposes. 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 for taking current. The LEd wafer is embedded in, for example, a package of a resin. The package can be configured such that light from the LED wafer is emitted in one or more specified directions. LEDs have a small appearance size that enables the formation of a thin and variable design. An example is a light sheet that can be placed over a surface or integrated with a surface. For example, a illuminating sheet has an embedded lED or an embedded LED array. The LEDs emit light at their location within the sheet. The small appearance size of the led is converted to extremely high brightness, for example, more than 1 〇 6 cd/m 2 . Therefore, one of the problems with illuminating sheets incorporating LED arrays is that the sheets have locally high intensity regions at the LEDs. Individual (4) can produce glare and unwanted shadow effects. In many applications, it is desirable to obtain a more uniform light output intensity across one of the areas of the sheet, for example by diffusing the LED light output over a larger area (i.e., 1 cm to 1 〇 cm). For this purpose, auxiliary optics such as a light diffusing layer or a scattering surface can be used. Another example of a illuminating sheet uses an optical cavity to diffuse light and thereby produce a 159948.doc 201232070 optical cavity system for output uniformity is particularly special. This cavity can be in the form of a sway, which is more uniform output. For example, an important LCD backlight unit cavity is illuminated by edge-mounted LEDs. One example of this type of U is a pmma (poly(methyl methacrylate)-transparent thermoplastic) waveguide, sometimes called - Light surface layer. Light is captured within the waveguide by total internal reflection and a light output coupling structure is used to produce uniform illumination at the light output surface. These light output coupling structures provide a change in one of the refractive indices or a change in the angle of the light, for example to interrupt total internal reflection. For example, it may include a light scattering region. The output coupling area is configured with reference to the led position - for example, the denser the arrangement, the denser the arrangement from the led, so that a uniform intensity over the area of the light output surface requires more light output areas. 1 shows a PMMA waveguide illuminator and shows an irregular pattern of edge-coupled LEDs 1 (eg, red, green, and blue), waveguide 丨 2, and light output coupling structure 4. This pattern is accurately calculated to ensure a good uniformity. For example, the waveguide is 1 mm thick. Circle 2 shows the structure of Figure 1 in cross section. The light output coupling structure can take various forms such as scattering lacquer spots, micro-pits, micro-turns, microlenses, domains with surface roughness, phosphor dots. One application of the illuminating sheet is a so-called "transmission-emitting window" which is transparent and thus forms part of a window (or is provided above a window), but is also emitted and can therefore be used for illumination. The surface layer is thus used as an glazing material (usually above a substrate such as glass). SUMMARY OF THE INVENTION J59948.doc 201232070 The present invention is directed to the problem of producing a low cost general illumination system in the form of a Η 片 片 in a cut-to-measure architecture. - The light guide can provide a low cost method for distributing light from the coffee, but the challenge thus becomes how to make the light guide cut by size. As explained above, the known design has an output coupling that depends on the location of the coffee. This prevents the cutting of a larger piece by size so that the remainder of the piece can be used for another application. According to the present invention, there is provided an illumination system comprising: a light guide comprising: a sheet of light guiding material and an array of output consumable structures formed in a regular pattern at a surface of the sheet of light guiding material; and at least A module 'its money (four) light (four) material is on the surface (4) to direct light into the sheet. This design enables the formation of a general illumination system comprising LEDs and a light guide. The light guide includes a regular (i.e., periodic) output coupling structure that does not span the global variation of the light guide (although it may include a repeating partial pattern). The LEDs are provided as separate components to be mounted on the light guide (e.g., placed anywhere on the light guide). A regular pattern means that the light guide can be cut to size without reference to the number or positioning of the LED light sources. The illumination system imparts a light output at a location near the LED, wherein the light from the LED is distributed in the light guide. The exact shape of the illuminating region can be selected by designing the angular emission profile of the LED module. The sheet of light guiding material may comprise PMMA, glass or polycarbonate. Thus, known light guiding materials can be used, and the present invention does not impose any unusual requirements on the materials to be used. Similarly, known light output coupling junctions can be used, such as scattering lacquer spots, micro-grooves, micro-tuners, microlenses, domains with surface roughness, and scale points. The LED module can include means for directing light output at an angle within a radius of one direction perpendicular to one of the sheets. This helps couple light into the light guide. The LED module can include components for directing light output over a range of lateral angles. This can be used to control what light output is formed and thereby define the desired positioning of the lEd module relative to the light output coupling structure pattern. Preferably, a plurality of LED modules are electrically interconnected by a transparent conductive sheet or by extremely thin, unobtrusive wires. The pattern can be made in two dimensions on the surface of the sheet, regular, and repeated at each light output coupling structure. This means that the LED module can be placed anywhere on the chip and can be placed in any number because the pattern does not have the features linked to the LED module. The 疋'4 pattern can be equally regular in both dimensions of the surface of the sheet' but it can be repeated at the level of a subset of the light output coupling structures. A subset of the light-transmitting structure can be designed to have a particular women's position of (10) for optimally coupling light into the light guide. Preferably, a method for forming an optical contact between the LED module and the light guide is provided, which comprises: 1. The invention also provides a configuration for cutting a light guide to - you are B #丄, ~ kg expected The light guide comprises a light guiding web and an array of light output coupling structures formed on one surface of the light guiding material sheet; and mounting the at least one LED module on the hobbyist. The surface of the material guide sheet is 159948.doc 201232070 for guiding light into the sheet. [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. The light guide includes a sheet of light guiding material and an array of light-transmission structures formed as a regular pattern on one surface of the sheet of light guiding material. At least one of the led molds is mounted on the surface of the sheet of light guiding material for transferring light (4) into the sheet. This configuration combines the glossy surface into the sheet from above, and this means that unlike the edge light configuration, the light output face structure is not required. The rule pattern means that the (four) pieces can be cut by size and the remainder of the piece can be used in other lighting systems. Figure 3 shows a first example of a lighting system of the present invention. The general illumination system 30 includes an LED 32 and a light guide 31. The light guide 3i includes a periodic light output face-to-face structure 35 that does not vary across the light guide 31, and the coffee maker 32 is provided as part of an LED module 33. The LED module 33 can be placed anywhere on the light guide 31 using an adhesive 38 to form an optical contact between the LED module 33 and the light guide 31. When the LED module 33 has been applied, the LED light 34 will be coupled into the light guide 31 and will be outputted using the output light structure 35, for example as indicated at position %. The resulting optical effect is that the bright LED emissions of a single LED are distributed over a relatively large area, thereby reducing glare to that LED emissions become suitable for use as one of the general illumination levels. In this example, the pattern of light diffused from the LED is symmetrical about the position of the LED 159948.doc 201232070. As shown, the distance between the light output coupling structures can be smaller than the size of the LED module, so that the positioning of the LED module is not critical. Regardless of where the LED is positioned, the pattern of the light output coupling structure around it will be substantially the same. of. The L E D module is designed such that light does not reflect at the interface between the L E D module and the surface of the sheet. Therefore, the light is integrated into the month. The light output coupling structure can cause some of the light from the LED module to be reflected back into the LED module where the light will be partially absorbed (about 4%) and partially reflected back again. However, the absorbed light will be partially re-emitted by the light recycling mechanism (about 60%). Thus, the fact that the light output coupling structure prevents perfect coupling from the LED module to the light guide does not significantly reduce the efficiency' light output light structure also occupies a relatively small area. Since the pattern of the light output coupling structure is completely regular, the sheet can be used anywhere in any number of LED modules and LED modules. The regular pattern does not have spatial non-uniformity or spatial dependence on its pattern. This reveals the possibility of using a new light output coupling mechanism that does not provide a non-uniform pattern as previously required. For example, the pattern can include providing a lacquer applied in one of the scattering particles at a very low density. By applying this lacquer to the light guide, the lacquer layer acts as a uniform output coupling layer. Another example includes a lacquer of one of phosphor particles (such as an organic phosphor). A uniform output coupling layer is also provided by applying a thin layer of this lacquer. In such configurations, the intensity of the light pattern surrounding the LED module will be closer to the LED module as it is closer to the source. Alternatively, the pattern may have a partial design for an individual LED module. 159948.doc 201232070 1 . For example, the farther away from the wheel, the closer the structure is. Thus, the pattern can be repeated at the level of the sub-array of the light output coupling structure rather than at the level of the individual light round alpha structure. This requires a regular pattern, but does not require a rule of perfect simplification - in other words, the regularity is not at the level of a different light output coupling structure. Then the LED module has a better attachment to one of the designs. ‘&" b also thinks that the LED module should ideally be placed on each of the diced sheets. Also at the attachment point, but this is not essential. In order to efficiently couple light into the light guide, the angular distribution of the LED light emitted by the LED module 33 should be optimized. Preferably, the LED module emits light only at a large angle (i.e., away from the direction), and thus is captured at equal angles in the light guide. The LED light that would normally be emitted at a small angle should be redirected towards these larger angles. The LED light can be redirected in several ways to optimize the angular distribution: - mirrors, lenses and/or obstacles; - interference coatings; - a back reflector layer (which efficiently reflects light at small angles) , but transmits light at a larger angle). The purpose of these measures is to direct the light output of the LED module from an angle within a direction perpendicular to one of the sheets. Optical measures for performing this operation will be routinely practiced by those skilled in the art. For example, an interference coating can be designed that reflects light that is emitted at a small angle and that passes light that is emitted at a large angle. This applies in particular to the blue 159948.doc 201232070 color or near-UV LED, in which a portion of the input light is converted to another part of the spectrum by a fill. The same method can be applied to all red, green and blue LEDs' each of which has its own specially designed interference filter. The LED module can also be designed to direct light output over a range of lateral angles. In this way, a predefined LED angular distribution is used to make the light output spatially uniform. In particular, the LED module can have an angular emission profile to uniformly illuminate a predetermined area of the periodic output coupling structure over the space. For example, this angular distribution can be similar to a so-called "batwing" distribution. It is contemplated that the illuminated area may have a regular geometry such that full tiling of the surface is possible. Some examples of such an illuminated area are shown in FIG. The plan view in Fig. 4 shows one of the LED modules 40' at the center of a triangular region in which a plurality of triangles form a grid. The module 42 is at a corner of a square area, and the squares form a grid. The module 44 is at the center of a square region in which the squares form a grid; and the module 46 is at the center of a hexagonal region, wherein the hexagons form a grid. The cross-section in Figure 4 shows the angular light pattern produced by controlling the intensity in different directions (represented by the length of arrow 48). Therefore, there is an angular range of 180 degrees in the section through the sheet. The range and relative intensity of the illumination wheel-off coupling structure are controlled by controlling the intensity in different directions. By surrounding the LED module with the intensity pattern at different angles, the outer shape of the illuminated area is controlled. 159948.doc 201232070 The end user can choose to have a custom lighting pattern by placing an -LED module at each of the regions to form a "moon king surface" or by placing the LEDs into a particular grid. “When the LED is placed on the light guide, it is still free, because the light extraction pattern can be kept even. The control of the angular distribution is part of the LED module design. It can be explained by _L text – special design 4 interference The coating controls the lateral angle pattern. Red, green, blue, and near-UV LEDs require their own design to be tuned to a specific wavelength. Another example is a shutter that does not require directional travel, for example, a sheet or aperture An extremely thin conductive wire (but preferably a transparent conductive material such as an IT tape provided on a transparent carrier that can be attached to the light guide) can be used to achieve power supply to the LED module. For example, Figure 5 The LED module including two LEDs 32 and one patterned transparent conductive coating 39 is shown. By using a uniform light extraction pattern, the LED module can be placed at will, and the light guide can be cut according to the size. The study, the disclosure and the scope of the patent application, the disclosure of the patent application can be understood and implemented in the practice of the invention, and other variants of the disclosed embodiment can be understood. "Comprising" (comprising,) does not exclude other elements or steps, and the indefinite article "a" (a), or "a" (AN) does not exclude a plurality. The fact that certain measures are stated in the sub-relevant claims t does not indicate that such measures cannot be used in an advantageous manner. Any reference signs in the scope of patents should not be construed as limiting the scope. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a known illuminating sheet; FIG. 2 is a cross-sectional view showing the illuminating sheet of FIG. 1; FIG. 3 is a view showing a first example of the illuminating system of the present invention; 4 shows a second example of a lighting system of the present invention; and Figure 5 shows a third example of a lighting system of the present invention. [Major component symbol description] 10 Edge-coupled light-emitting diode 12 Waveguide 14 Light-output coupling structure 30 Illumination system 31 Light guide 32 Light-emitting diode 33 Light-emitting diode module 34 Light-emitting diode light 35 Light-output coupling structure 36 Position 38 Adhesive 39 Patterned Transparent Conductive Coating 40 Light Emitting Diode Module 42 Module 44 Module 46 Module 48 Arrow 159948.doc -12-