200905254 九、發明說明： 【發明所屬之技術領域】 本發明是有關於-種光學系統或元件，且特別是有關 於一種將集中光源擴散的裝置。 【先前技術】 背光模組（Backlight module)係泛指可提供產品一個背 面光源的組件，目前運用在各種資訊、通訊、消費產品上， 如：液晶顯示器（Liquid Crystal Display，LCD)、底片掃 描器、幻燈片看片箱等產品。 一般而言，背光模組主要是由三個部分所組成：外殼、 光學板材及光源。依照其光源入射位置的不同，可分成側 邊發光式（edge lighting)與直下發光式（bott〇m Ughting)兩 種。 側邊發光式之背光模組，通常是應用於例如手提型電 腦等要求省電與輕薄之產品上。為了達到輕薄之要求，通 常是於背光模組的側邊放置光源，並藉由導光板（Light guide plate) ’將光源射出的光導引至顯示面板上。 直下發光式之背光模組，通常是應用於例如電視等需 具備尚凴度之產品上。為了提昇輝度，傳統上是將複數個 光源排列於顯示面板之正下方’使得光源射出的光直接照 射顯示面板。 然而’不論是側邊發光式或直下發光式之背光模組， 大夕無法將光源射出的光均勻地分佈至顯示面板上，此將 造成整體晝面的輝度不均勻，進而影響消費者的視覺感受。 200905254 【發明内容】 口此本發明一方面就是在提供一種光源調制裝置，用 以將光源射出的光均勻地分佈於平面上。 根據本發明一實施例，—種光源調制裝置包含第一擴 散膜、第二擴散膜與擴散膠。其中，擴散膠係將第一擴散 膜黏貼至第二擴散膜上，且此擴散膠具有主劑以及混於主 劑中的複數個擴散顆粒。 根據本發明另一實施例，一種光源調制裝置包含第一 ㈣膜與擴散膠° ’第一擴散膜具有第—擴散層，且 此第一擴散層具有第-主劑與混於第—主劑中的複數個粒 子。這些粒子的折射率與第一主劑之折射率間具有一第一 折射率差。擴散膠則塗佈於第一擴散膜背對第一擴散層之 表面，且此擴散膠具有第二主劑以及混於第二主劑中的複 數個擴散顆粒。這些擴散顆粒之折射率與第二主劑之折射 率間具有一第二折射率差，且此第二折射率差的絕對值較 上述之第一折射率差的絕對值高。 綜以上所述，本發明上述實施例之光源調制裝置可將 光源所射出的光先藉由擴散膠進行内部擴散，接著再藉由 第一擴散臈進行外部擴散，使得光源所射出的光可均勻地 分佈於平面上。 【實施方式】 以下將以圖示及詳細說明清楚說明本發明之精神，如 熟悉此技術之人員在瞭解本發明之實施例後，當可由本發 200905254 明所教示之技術，加以改變及修飾，其並不脫離本發明之 精神與範圍。 參照第1圖，其繪示依照本發明一實施例之光學調制 裝置的一種縱剖面圖。如圖所示，一種光源調制裝置包含 第一擴散膜110、第二擴散膜120與擴散膠13〇。其中，擴 散膠130係將第一擴散膜丨1〇黏貼至第二擴散膜12〇上， 且此擴散膠130具有第一主劑132以及混於第一主劑！32 中的複數個擴散顆粒134。 更具體地說，第1圖之第一擴散膜n〇具有基材112 與第-擴散層114。其中，第—擴散^ 114具有第二主劑 118與混於第二主劑118中的複數個粒子119，以於第一擴 散膜110旁對第一擴散膜120的-面形成粗糙霧φ 115。此 外’上述之粒子119的折射率與第二主劑118之折射率間 具有一第一折射率差。 擴散膠130則塗佈於基材112背對第一擴散層ιΐ4之 表面。在此擴散膠’擴散顆粒134之折射率與第一 主劑132之折射率間具有—第二折射率差，且此第二折射 率差的絕對值較上述之第-折射率差的絕對值高。 在本實施例中，第二折射率 干左的絕對值可介於約 0.01〜0.9。具體而言，擴散膠13 υ之第一主劑132的材質可 包含壓克力樹脂（Acrylics resin，折 祈射率約為1.49)，而擴散 顆粒134的材質可包含二氧化 傭月又 夕（Silica，折射率約為1 45 〜2)。應暸解到，以上所述 千]馬丨.竹 非用以限制本發明，上述4擴I:方僅為例示，並 樹脂(P〇1y Urethane ; TO ^劑的材質亦可為聚氨醋 折射率約為LH.53)或氣丁 *7 200905254 二烯橡膠（Chl〇roprene Rubber; CR，折射率約為 1.45 〜 1.53)，而擴散齡的材f則可為二氧切（ai_s叫，折 射率約為i.65)、：氧化鍺（Ge〇2，折射率約為165)或二氧 化鈦_2,折射率約為2_3)，f知此項技藝者當依實際需 要彈性選擇之。 此外，擴散膠130中亦可另外添加溶劑、硬化劑及添 加劑。舉例來說，本實施例之擴散膠13〇即添加了 f乙酮 (methyl-ethyl ketone ； MEK)作為溶劑、異氰酸酯 (Isocyanate)與環氧樹脂（Epoxy)作為硬化劑以及矽烷（silane) 作為添加劑。此外’在擴散膠13〇中，壓克力樹脂、二氧 化石夕、甲乙酮、異氰酸酯、環氧樹脂與石夕烧的含量比（phr) 可為 100 : 5.8 : 40 : 0.211 : 0.076 : 0.029，而其的厚度可 為10 μιη〜40 μιη，或15 μηι〜25 μπι。同樣地，以上所述之 擴散膠的配方僅為例示，並非用以限制本發明，以下表一 將列出其它可能的配方，習知此項技藝者應視實際需要彈 性選擇之。 名稱 可能材料 可能含量比（phr) 第一主劑 L-- 壓克力樹脂、聚氨 酯樹脂或氯丁二烯 橡膠 100 200905254 溶劑 —·_ 甲乙_、異丙醇、 醋酸乙酯、醋酸丁 酯、曱基異丁 _、 甲苯、二甲苯等鲷 類、醋類、芳香族 或上述溶劑的細厶 10〜200 硬化劑 異氰酸系硬化劑、 芳香族類異氰酸鹽 類或脂肪族類異氰 酸鹽類 0.1 〜0.5 硬化劑 環氧樹脂系硬化劑 0-03 〜0.3 擴散顆粒 一氧化妙、紹-二氧 化矽、二氧化鍺、 一氧化鈦或其它有 機/無機氧化物 --— *-" · 〇-3 〜30 添加劑 任何型式的耦合劑 ----------- 0.01 〜0.3 一·__ 表一擴散膠的配方 夕4乃"7’在本實施例之第一擴散層114巾，粒子119 主劑118之折射率間的差值(換言之，第- 之=約±〇.〇1〜±〇.2。具體而言，第-擴散層μ !=主劑m的材質可包含多元醇（p〇iy〇i，折射率約為 1)而粒子119的材質則可包含聚甲基丙烯酸甲 200905254 酯㈣ymethyl Methacrylate ; ρΜΜΑ，折射率約為】49)。 應瞭解到，以上所述之第—擴散層的配方僅為例示，並非 用以限制本發明，上述之第二主劑的材質亦可為聚醚型多 7G醇(折射率^ 149〜151)、丙稀酸多元醇(折射率約為 1.49〜1.51)、|克力樹脂（折射率約為149)或聚氨醋樹腊 (折射率、力為1.45〜1.53)，而粒子的材質則可為丙烯酸樹脂 (折射率約為Μ6〜吻、聚氨醋樹月旨（折射率約為Μ5〜 Ο 聚氯乙輸射率約為146〜159)或聚苯乙稀(折射 =、，勺為Μ6〜⑸），習知此項技藝者當依實際需要彈 擇之。 同樣地，第一擴散層114中亦可另外 劑:舉例來說’本實施例之第-擴散層U4即添加了；乙 ^為溶劑以及異氛酸醋作為硬化劑。此外，在第一擴散 二中多元醇、聚甲基丙烯酸甲醋、甲乙酮與異 3〇的3置比(Phr)可為1H2⑴6.4,而其厚度可為 下或介於8_〜25陳。應瞭解到’以上所述之第 :政層U4的配方僅為例示’並非用以限制本發明，以 需它可能的配方，習知此項技藝者應視實際 名稱 可能材料 可能含量比（phr) 10 200905254 第二主劑 聚醚型多元醇、 丙烯酸多元醇、 壓克力樹脂或 聚氨酯樹脂 100 溶劑 甲乙酮、異丙醇、 醋酸乙酯、醋酸丁 酯、甲基異丁酮、 甲苯、二曱苯等酮 類、酯類、芳香族 或上述溶劑的組合 100〜500 硬化劑 異氰酸系硬化劑、 芳香族類異氰酸鹽 類或脂肪族類異氰 酸鹽類 3〜15 粒子 丙烯酸樹脂、 聚氨酯樹脂、 聚氯乙烯或 聚苯乙烯 15 〜150 表二第一擴散層的配方 如第1圖所繪示，第二擴散膜120亦可具有粗糙霧面 125，其係位於第二擴散膜120背對第一擴散膜110的一 π 200905254 面。具體而言，第1圖之第二擴散膜12〇亦可具有基材122 與擴散層124，而粗糙霧面125則正位於擴散層124的表 面。其中，第二擴散膜12〇之擴散層124大致與上述之第 一擴散層114具有相同的配方與厚度範圍，唯在此擴散層 124中，多元醇、聚甲基丙-烯酸甲酯、甲乙酮與異氰酸酯的 含量比（phr)可變更為 1〇〇 : 23.1 : 152.4 : 10.5。 第1〜3圖係繪示依照本發明各個實施例之光學調制裝 置的縱剖面圖。如圖所示’雖然第i圖之第二擴散膜12〇 僅於其背對第一擴散膜110的面上具有粗糙霧面125，但此 並不限制本發明，此第二擴散膜12〇亦可於其面對第一擴 散膜110的面上具有粗糙霧面127。具體而言，上述之第二 擴散膜120可具有面對擴散膠13〇之擴散層126，而粗糙霧 面127則正位於此擴散層126之表面（如第2〜3圖所緣 示）。此外，上述之擴散層126與擴散層124可具有相同的 配方與厚度範圍，在此不再贅述之。 第4〜6圖係繪示依照本發明各個實施例之光學調制裴 置的縱剖面圖。同樣地，雖然第丨圖之第一擴散膜ιι〇僅 於其背對第二擴散膜120的面上具有粗糙霧面115，但此並 不限制本發明，此第一擴散膜11〇亦可於其面對第二擴散 膜12〇的面上具有粗糙霧面117。具體而言，第一擴散膜 110可具有與第一擴散層114相對之第二擴散層116，而粗 糙霧面117則正位於此第二擴散層116之表面。此外，在 第4〜6圖中，擴散膠13〇係可塗佈於此第二擴散層116上， 或塗佈於第一擴散膜12〇背對於擴散層124之基材122面。 同樣地’上述之第二擴散層116可與第—擴散層ιΐ4具有 12 200905254 相同的配方與厚度範圍，在此不再贅述之。 綜以上所述，第—擴散膜110不但可單獨具有向外的 粗糙霧面115(如第1〜3圖所繪示），也可以兼具有向内的 粗縫務面117(如第4〜6圖所續·示）。此外，第二擴散膜12〇 可單獨具有向外的粗糙霧面125(如第1、4圖所繪示）、單 獨具有向内的粗糙霧面127(如第2、5圖所繪示）或兩者兼 備（如第3、6圖所繪示）。 此外，第一擴散膜110之基材112與第二擴散膜12〇 材122的材貝可為聚對苯二甲酸乙二醋（p〇iyethyiene200905254 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to an optical system or component, and more particularly to a device for diffusing a concentrated light source. [Prior Art] Backlight module refers to a component that can provide a back light source for products. It is currently used in various information, communication, and consumer products, such as liquid crystal display (LCD) and film scanner. , slide to see the box and other products. Generally speaking, the backlight module is mainly composed of three parts: a casing, an optical plate and a light source. According to the difference of the incident position of the light source, it can be divided into two types: edge lighting and bottom-lighting (bott〇m Ughting). The side-lit backlight module is usually applied to products requiring power saving and thinness such as a portable computer. In order to achieve the requirements of lightness and thinness, a light source is usually placed on the side of the backlight module, and the light emitted from the light source is guided to the display panel by a light guide plate. The direct-lit backlight module is usually used in products such as televisions that require a high degree of functionality. In order to increase the luminance, it is conventional to arrange a plurality of light sources directly under the display panel' such that the light emitted from the light source directly illuminates the display panel. However, 'whether it is a side-lit or direct-lit backlight module, Da Xi can't evenly distribute the light emitted by the light source to the display panel, which will cause uneven brightness of the entire surface, which will affect the consumer's vision. Feel. 200905254 SUMMARY OF THE INVENTION In one aspect, the present invention provides a light source modulating device for uniformly distributing light emitted from a light source on a plane. According to an embodiment of the invention, a light source modulating device includes a first diffusion film, a second diffusion film, and a diffusion gel. Wherein, the diffusion gel adheres the first diffusion film to the second diffusion film, and the diffusion gel has a main agent and a plurality of diffusion particles mixed in the main agent. According to another embodiment of the present invention, a light source modulating device includes a first (four) film and a diffusion gel. The first diffusion film has a first diffusion layer, and the first diffusion layer has a first-principal agent and is mixed with the first-based agent. Multiple particles in the middle. The refractive index of these particles has a first refractive index difference from the refractive index of the first host. The diffusion gel is applied to the surface of the first diffusion film facing away from the first diffusion layer, and the diffusion gel has a second main agent and a plurality of diffusion particles mixed in the second main agent. The refractive index of the diffusion particles and the refractive index of the second host have a second refractive index difference, and the absolute value of the second refractive index difference is higher than the absolute value of the first refractive index difference described above. In summary, the light source modulating device of the above embodiment of the present invention can internally diffuse the light emitted by the light source by diffusion glue, and then externally diffuse by the first diffusion ,, so that the light emitted by the light source can be uniform. The ground is distributed on a plane. The present invention will be clearly described and illustrated by the following description of the embodiments of the present invention, which can be modified and modified by the teachings of the present invention. It does not depart from the spirit and scope of the invention. Referring to Fig. 1, there is shown a longitudinal sectional view of an optical modulation device in accordance with an embodiment of the present invention. As shown, a light source modulating device includes a first diffusion film 110, a second diffusion film 120, and a diffusion paste 13A. Wherein, the diffusion adhesive 130 adheres the first diffusion film 丨1〇 to the second diffusion film 12〇, and the diffusion adhesive 130 has the first main agent 132 and is mixed with the first main agent! A plurality of diffusion particles 134 in 32. More specifically, the first diffusion film n〇 of FIG. 1 has a substrate 112 and a first diffusion layer 114. The first diffusion layer 114 has a second main agent 118 and a plurality of particles 119 mixed in the second main agent 118 to form a rough mist φ 115 on the surface of the first diffusion film 120 adjacent to the first diffusion film 110. . Further, the refractive index of the particles 119 and the refractive index of the second host agent 118 have a first refractive index difference. The diffusion adhesive 130 is applied to the surface of the substrate 112 facing away from the first diffusion layer ι4. The refractive index of the diffusion gel 'diffusion particles 134 and the refractive index of the first main agent 132 have a second refractive index difference, and the absolute value of the second refractive index difference is greater than the absolute value of the first refractive index difference. high. In this embodiment, the absolute value of the left refractive index dry left may be between about 0.01 and 0.9. Specifically, the material of the first main agent 132 of the diffusion adhesive 13 may include an acrylic resin (Acrylics resin, the folding rate is about 1.49), and the material of the diffusion particles 134 may include the second month of the dioxide ( Silica has a refractive index of about 1 45 〜 2). It should be understood that the above-mentioned thousands of horses. Bamboo is used to limit the present invention, the above 4 expansion I: is only an example, and the resin (P〇1y Urethane; TO ^ material can also be polyurethane refraction The rate is about LH.53) or gas ding*7 200905254 diene rubber (Cr〇roprene rubber; CR, refractive index is about 1.45 ~ 1.53), while the material of diffusion age f can be dioxobic (ai_s called, refraction) The rate is about i.65), yttrium oxide (Ge 〇 2, refractive index is about 165) or titanium dioxide _2, and the refractive index is about 2 _ 3), which is known to the skilled person to be elastically selected according to actual needs. Further, a solvent, a hardener, and an additive may be additionally added to the diffusion gel 130. For example, the diffusion adhesive 13 of the present embodiment is added with methyl ethyl ketone (MEK) as a solvent, isocyanate and epoxy resin (Epoxy) as a hardener, and silane as an additive. . In addition, in the diffusion adhesive 13 ,, the content ratio (phr) of acrylic resin, dioxide dioxide, methyl ethyl ketone, isocyanate, epoxy resin and Shi Xi burning can be 100: 5.8 : 40 : 0.211 : 0.076 : 0.029, The thickness thereof may be 10 μm to 40 μm, or 15 μm to 25 μm. Similarly, the formulations of the diffusion gels described above are merely illustrative and are not intended to limit the invention. Other possible formulations are listed in Table 1 below, and those skilled in the art should select elastically depending on the actual needs. Name Possible material content ratio (phr) First main agent L-- Acrylic resin, polyurethane resin or chloroprene rubber 100 200905254 Solvent—·_ A, isopropyl alcohol, ethyl acetate, butyl acetate, Anthraquinones such as decyl isobutyl amide, toluene, xylene, etc., vinegar, aromatic or a solvent of the above solvents 10~200 hardener isocyanate hardener, aromatic isocyanate or aliphatic Cyanate 0.1~0.5 Hardener Epoxy Resin Hardener 0-03 ~0.3 Diffusion Particles Oxidation, Sodium-Oxide, Antimony Oxide, Titanium Oxide or Other Organic/Inorganic Oxide--* -" · 〇-3 ～30 Additives Any type of coupling agent----------- 0.01~0.3 一·__ Table 1 Diffusion adhesive formulation 夕 4 is "7' in this embodiment The first diffusion layer 114, the difference between the refractive indices of the particles 119, the main agent 118 (in other words, the first = about ± 〇. 〇 1 ~ ± 〇. 2. Specifically, the first diffusion layer μ ! = main The material of the agent m may include a polyol (p〇iy〇i, a refractive index of about 1) and the material of the particle 119 may comprise a polymethyl methacrylate 200. 905254 ester (tetra) ymethyl Methacrylate; ρ ΜΜΑ, refractive index is about 49). It should be understood that the formulation of the first diffusion layer described above is merely an example, and is not intended to limit the present invention. The material of the second main agent may also be a polyether type 7G alcohol (refractive index ^ 149~151). , acrylic acid polyol (refractive index is about 1.49~1.51), gram resin (refractive index is about 149) or polyurethane wax (refractive index, force is 1.45~1.53), and the material of the particles can be For acrylic resin (refractive index is about Μ6~ kiss, polyurethane tree (refractive index is about 〜5~ 聚 polychloroethylene transmission rate is about 146~159) or polystyrene (refraction=,, spoon is Μ6~(5)), it is known that the skilled person should perform the selection according to the actual needs. Similarly, the first diffusion layer 114 may be additionally: for example, the first diffusion layer U4 of the embodiment is added; B is a solvent and an oleic acid vinegar as a hardener. Further, in the first diffusion two, the ratio (Phr) of the polyol, the polymethyl methacrylate, the methyl ethyl ketone and the iso- 3 可 may be 1H 2 (1) 6.4, and The thickness may be lower or between 8 mm and 25 cm. It should be understood that the above-mentioned formula: the formulation of the government layer U4 is merely an illustration 'not to limit the invention, It is necessary to formulate it, and the skilled person should regard the actual name. The possible material content ratio (phr) 10 200905254 The second main agent polyether polyol, acrylic polyol, acrylic resin or polyurethane resin 100 solvent methyl ethyl ketone a combination of ketones such as isopropyl alcohol, ethyl acetate, butyl acetate, methyl isobutyl ketone, toluene or diphenylbenzene, esters, aromatics or a combination of the above solvents 100 to 500 hardener isocyanic curing agent, Aromatic isocyanates or aliphatic isocyanates 3 to 15 particles of acrylic resin, polyurethane resin, polyvinyl chloride or polystyrene 15 to 150 The formulation of the first diffusion layer of Table 2 is as shown in Fig. 1. It is shown that the second diffusion film 120 can also have a rough matte surface 125, which is located on a π 200905254 surface of the second diffusion film 120 opposite to the first diffusion film 110. Specifically, the second diffusion film 12 of FIG. The crucible may also have a substrate 122 and a diffusion layer 124, and the rough matte surface 125 is located on the surface of the diffusion layer 124. The diffusion layer 124 of the second diffusion film 12 is substantially the same as the first diffusion layer 114 described above. Formula and thickness In the range of the diffusion layer 124, the content ratio (phr) of the polyol, the polymethyl methacrylate, the methyl ethyl ketone and the isocyanate may be more than 1 〇〇: 23.1 : 152.4 : 10.5. A longitudinal cross-sectional view of an optical modulation device in accordance with various embodiments of the present invention is shown. As shown in the figure, although the second diffusion film 12 of the second embodiment has rough fog only on the surface thereof facing away from the first diffusion film 110. The surface 125, but this does not limit the present invention, and the second diffusion film 12 can also have a rough matte surface 127 on the surface thereof facing the first diffusion film 110. Specifically, the second diffusion film 120 may have a diffusion layer 126 facing the diffusion paste 13 while the rough surface 127 is located on the surface of the diffusion layer 126 (as shown in Figures 2 to 3). In addition, the diffusion layer 126 and the diffusion layer 124 described above may have the same formulation and thickness range, and will not be described again. 4 through 6 are longitudinal cross-sectional views showing optical modulation devices in accordance with various embodiments of the present invention. Similarly, although the first diffusion film of the first drawing has a rough matte surface 115 only on the surface thereof facing away from the second diffusion film 120, the present invention is not limited thereto, and the first diffusion film 11 can also be used. The surface facing the second diffusion film 12A has a rough matte surface 117. Specifically, the first diffusion film 110 may have a second diffusion layer 116 opposite to the first diffusion layer 114, and the rough surface 117 is located on the surface of the second diffusion layer 116. Further, in Figs. 4 to 6, the diffusion adhesive 13 may be applied to the second diffusion layer 116 or applied to the surface of the substrate 122 of the diffusion layer 124. Similarly, the second diffusion layer 116 described above may have the same formulation and thickness range as the first diffusion layer ι 4 having 12 200905254, and will not be described again. In summary, the first diffusion film 110 may have not only an outward rough surface 115 (as shown in FIGS. 1 to 3) but also an inward coarse surface 117 (eg, 4th). ~6 Figure continues to show). In addition, the second diffusion film 12 单独 may have an outwardly outward rough surface 125 (as shown in FIGS. 1 and 4 ) and an inwardly rough surface 127 (as shown in FIGS. 2 and 5 ). Or both (as shown in Figures 3 and 6). In addition, the substrate 112 of the first diffusion film 110 and the material of the second diffusion film 12 122 122 may be polyethylene terephthalate (p〇iyethyiene)
Terephthalate; PET)或聚碳酸酯（p〇iyCarbonate; PC)， 而其厚度可介於35 μιη〜250 um或100 μιη〜190 μηι。 以下表三列出數個實驗樣品在各個視角的輝度資料。 ”中’貫驗樣品一與實驗樣品二皆具有第1圖所繪示的結 構唯其第二擴散膜的霧度不同；實驗樣品三則具有第2 圖所'、θ示的結構。此外，實驗樣品--三之粒子與擴散顆 粒的形狀均為圓形。 --— —** —一一 三 &圖 第1圖 第1圖 第2圖 第—擴散臈 _霧度 88 88 88 穿透率 >65 >65 >65 ^-- 第一折射 率差 0〜0.02 0〜0.02 0〜0.02 13 200905254 粒子分 佈特徵 單分佈 單分佈 單分佈 霧度 88 50 88 穿透率 >65 >65 >65 第二擴散膜 第一折射 率差 0〜0.02 0〜0.02 0〜0.02 粒子分 佈特徵 單分佈 單分佈 單分佈 霧度 85 85 85 穿透率 >60 >60 >60 擴散膠 第二折射 率差 0.04 0.04 0.04 擴散顆粒 分佈特徵 多分佈 多分佈 多分佈 0〇 2723 3119 3274 水平 20° 2724 3067 3078 輝度 視角 40° 2683 2665 2505 60° 2527 2061 2023 (nits) 0° 2723 3119 3274 垂直 20° 2781 3290 3184 視角 40° 2942 3308 2764 60° 2903 2514 2192 視角-輝度 曲線 水平視角 第7A圖 第8A圖 第9A圖 14 200905254 垂直視角 第7B圖 第8B圖 第9B圖 表三不同實驗樣品在各個視角的輝度資料 由表三可知，不論是實驗樣品--三，在中心0 °〜20 ° 視角下的輝度是以每度小於10 ni ts的速度缓慢遞減。即 使是在20°〜40°視角下，輝度也是以每度小於30 nits的 速度緩慢遞減。因此，上述實施例之光源調製裝置確實可 將光源均勻地分佈到平面上，且輝度不會隨著視角增加而 快速下降。 雖然本發明已以實施例揭露如上，然其並非用以限定 本發明，任何熟習此技藝者，在不脫離本發明之精神和範 圍内，當可作各種之更動與潤飾。舉例來說，上述之第一 擴散膜與第二擴散膜可為任何型式的擴散膜，例如：不同 霧度擴散膜（Normal Diffuser film)、集光擴散膜（enhance brightness diffuser film)、擴散聚光膜（Diffusion and brightness enhancement film)、聚光片(brightness enhancement film)、微結構（microstructure)或微透鏡結構 (microlens structure)擴散膜、微結構或微透鏡結構聚光膜、 微結構或微透鏡結構複合膜、濕式塗佈型擴散膜或運用表 面微結構或微透鏡結構及UV製程的熱浮雕（Hot Embossing) 微結構或微透鏡結構擴散膜。此外，上述實施例之光源調 制裝置亦不限於兩層擴散膜的黏貼，也可以是三層或多層 擴散膜的黏貼。另外，擴散膠之第一主劑的材質除了可為 15 200905254 熱固型樹脂外，熱塑型樹脂、紫外線硬化型樹脂或是放射 線硬化型樹脂也都可以應用來作為擴散膠之第一主劑。因 此，本發明之保護範圍當視後附之申請專利範圍所界定者Terephthalate; PET) or polycarbonate (p〇iyCarbonate; PC), and its thickness can be between 35 μηη~250 um or 100 μηη~190 μηι. Table 3 below lists the luminance data of several experimental samples at various viewing angles. The "intermediate" sample 1 and the experimental sample 2 have the structure shown in Fig. 1 except that the haze of the second diffusion film is different; the experimental sample 3 has the structure shown in Fig. 2, θ. The experimental sample--three particles and the shape of the diffusing particles are all circular. --- ** - one three three & figure 1 figure 1 figure 2 figure - diffusion 臈 _ haze 88 88 88 wear Permeability >65 >65 >65 ^-- First refractive index difference 0 to 0.02 0 to 0.02 0 to 0.02 13 200905254 Particle distribution characteristics Single distribution Single distribution Single distribution haze 88 50 88 Transmittance > 65 >65 >65 Second diffusion film first refractive index difference 0~0.02 0~0.02 0~0.02 Particle distribution characteristics Single distribution Single distribution Single distribution haze 85 85 85 Transmittance >60 >60 >60 Diffusion adhesive second refractive index difference 0.04 0.04 0.04 Diffusion particle distribution characteristics Multi-distribution Multi-distribution Multi-distribution 0〇2723 3119 3274 Horizontal 20° 2724 3067 3078 Luminance angle of view 40° 2683 2665 2505 60° 2527 2061 2023 (nits) 0° 2723 3119 3274 vertical 20° 2781 3290 3184 viewing angle 40° 2 942 3308 2764 60° 2903 2514 2192 Viewing Angle - Brightness Curve Horizontal Viewing Angle 7A Figure 8A Figure 9A Figure 14 200905254 Vertical Viewing Figure 7B Figure 8B Figure 9B Chart 3 Different experimental samples The luminance data at various viewing angles are shown in Table 3. Regardless of the experimental sample - three, the luminance at the center of 0 ° ~ 20 ° is slowly decreasing at a rate of less than 10 ni ts per degree. Even at a viewing angle of 20 ° ~ 40 °, the luminance is less than each degree. The speed of 30 nits is slowly decremented. Therefore, the light source modulating device of the above embodiment can uniformly distribute the light source to the plane, and the luminance does not decrease rapidly as the viewing angle increases. Although the present invention has been disclosed above by way of example, It is not intended to limit the invention, and various modifications and refinements may be made without departing from the spirit and scope of the invention. For example, the first diffusion film and the second diffusion film may be used. Any type of diffusion film, such as: Normal Diffuser film, enhancement brightness diffuser film, diffusion film (D) Iffusion and brightness enhancement film), brightness enhancement film, microstructure or microlens structure diffusion film, microstructure or microlens structure concentrating film, microstructure or microlens structure composite film A wet-coated diffusion film or a heat-embossed (Hot Embossing) microstructure or a microlens structure diffusion film using a surface microstructure or a microlens structure and a UV process. Further, the light source modulation device of the above embodiment is not limited to the adhesion of the two layers of the diffusion film, and may be the adhesion of the three or more diffusion films. In addition, the material of the first main agent of the diffusion adhesive can be 15 200905254 thermosetting resin, thermoplastic resin, ultraviolet curing resin or radiation curing resin can also be applied as the first main agent of the diffusion adhesive. . Therefore, the scope of protection of the present invention is defined by the scope of the appended claims.
為準D 【圖式簡單說明】 為讓本發明之上述和其他目的、特徵、優點與實施例 能更明顯易懂，所附圖式之詳細說明如下： 第1圖係緣示依照本發明一實施例之光學調制裝置的 —種縱剖面圖。 第2圖係繪示依照本發明另一實施例之光學調制裝置 的一種縱剖面圖。 第3圖係繪示依照本發明再一實施例之光學調制裝置 的一種縱剖面圖。 第4圖係繪示依照本發明又一實施例之光學調制裝置 的一種縱剖面圖》 第5圖係繪示依照本發明再一實施例之光學調制裝置 的一種縱剖面圖。 第6圖係繪示依照本發明又一實施例之光學調制裝置 的一種縱剖面圖。 第7A圖與第7B圖係分別繪示依照本發明一實例之光 源調制裝置的水平與垂直視角對輝度曲線圖。 >第8A圖與第8B圖係分別繪示依照本發明另一實例之 光源調制裝置的水平與垂直視角對輝度曲線圖。 16 200905254 第9A圖與第9B圖係分別繪示依照本發明再一實例之 光源調制裝置的水平與垂直視角對輝度曲線圖。 【主要元件符號說明】 110 : 第 一擴散膜 112 ： 基材 114 : 第 一擴散層 115 ： 粗糙 霧 面 116 ： 第 二擴散層 117 ： 粗糙 霧 面 118 ： 第 二主劑 119 ： 粒子 120 ： 第 二擴散膜 122 ： 基材 124 ： 擴 散層 125 ： 粗糙 霧 面 126 : 擴 散層 127 ： 粗糖 霧 面 130 ： 擴 散膠 132 ： 第一 主 劑 134 ： 擴 散顆粒 17BRIEF DESCRIPTION OF THE DRAWINGS [0009] The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; A longitudinal cross-sectional view of an optical modulation device of an embodiment. Fig. 2 is a longitudinal sectional view showing an optical modulating device according to another embodiment of the present invention. Figure 3 is a longitudinal cross-sectional view showing an optical modulation device in accordance with still another embodiment of the present invention. Fig. 4 is a longitudinal sectional view showing an optical modulating device according to still another embodiment of the present invention. Fig. 5 is a longitudinal sectional view showing an optical modulating device according to still another embodiment of the present invention. Figure 6 is a longitudinal cross-sectional view showing an optical modulation device in accordance with still another embodiment of the present invention. Fig. 7A and Fig. 7B are graphs showing the luminance curves of the horizontal and vertical viewing angles of the light source modulating device according to an example of the present invention, respectively. > Figs. 8A and 8B are graphs showing luminance versus horizontal and vertical viewing angles of a light source modulating device according to another example of the present invention, respectively. 16 200905254 FIGS. 9A and 9B are respectively a horizontal and vertical viewing angle versus luminance curve of a light source modulating device according to still another example of the present invention. [Main component symbol description] 110 : First diffusion film 112 : Substrate 114 : First diffusion layer 115 : Rough matte surface 116 : Second diffusion layer 117 : Rough matte surface 118 : Second main agent 119 : Particle 120 : Diffusion film 122 : Substrate 124 : Diffusion layer 125 : Rough matte surface 126 : Diffusion layer 127 : Rough sugar matte surface 130 : Diffusion adhesive 132 : First main agent 134 : Diffusion particles 17