201202753 六、發明說明： 【發明所屬之技術領域】 本發明關於光擴散板的技術領域’特別是具有高透光度與 高霧度的光擴散板結構。 X/' 【先前技術】 光擴散板是一種光學元件，它的作用是讓點光源或線光源 的光線經過光擴散板後可以擴散成面光源狀態。光擴散板可被 應用在液晶顯示器的冷陰極管、led背光模組、led室内外 照明裝置、傳統的照明裝置或車用照明裝置Γ然而目前市售的 籲 光擴散板之透光率約為60%〜80%，而且均勻度也不足，所 以若使用目刖已知透光率差的光擴散板，對光源而言會造成電 能的浪費。 台灣專利1274900揭露一種增加光擴散及提高亮度的光擴 散板，其主要是在一基板的一侧製作具有光學透鏡之微結構； 另外，一光擴散層位在微結構上用以加強光擴散效果。該專利 前案利用柱狀透鏡構造的微結構搭配光擴散層以使光源均勻 化；此外利用共擠壓成型技術，讓具有微結構之基板在成型的 同時，光擴散層也同步地形成在該微結構上。上述光擴散層的 • 光擴散粒子選自ΡΜΜΑ、、二氧化鈦、二氧化石夕、甲美 丙基酸甲酯。 台灣專利M294042揭露一種光擴散板結構，係在基板一 侧或二側結合有光擴散層。更進一步而言，其係在基材上直接 形成擴散層以完成光擴散板結構，而達到具有簡化構造之功 效。上述的基材為塑料材質、透明材質或玻璃材質製成，如 PC(聚石气酸酯)、PMMA(聚甲基丙烯酸甲酯)或Ms(甲基丙烯酸 甲醋聚苯乙稀）；而光擴散層則包含複數擴散粒子均句塗 減鍍、喷塗或印刷方式結合基材；如此綱擴散粒子的折射 201202753 率，可將光線折射而產生擴散效果。然而該專利前案 擴散粒子的成份。 ' ” 台灣專利1323791揭露-種具多重非球面表面結構之光擴 散板，其包含一板體，以及至少一個非球面結構形成在板體一' 側；特別是板體内部摻雜有紫外線吸收劑及光擴散粒子；該光 擴政粒子係選自於由聚碳酸輯樹脂(p〇lyCarb〇nate，pQ、聚甲 基丙烯酸曱酯(PolyOVTethyl methacrylate)，PMMA)、甲美丙 酸甲酯聚苯乙烯((Methyl methacrylate)Styrene，MS)、聚苯乙稀 (Polystyrene ’ PS)、氧化矽（Silica)、矽（Silic〇n)、聚 (Melamm)、碳酸鈣、鐵氟龍、二氧化欽(ή〇2)及二氧化 =的材料群財之至少—撕料，觀使光線_光擴餘 子時’造成光學擴散的效果。 、 台灣專利12783_露一種光擴散板製造方式及依此方式 巧的光擴散板，其主要藉由PC(聚碳酸輯脂 巧丙婦酸甲酯樹脂〕在各別加入光擴散 ^ 度之PC單元板體及PMMA單元《再ίϋ 光二單7^板體純結合成具有高透光率、高 iSS二，、不變形、質量輕且薄之光擴散板。 内。，擴政刎疋一氧化矽或二氧化鈦且摻雜於PMMA板材 中光3縣—種高亮度光雛板及其製程，其 内見光城綱躺目的。其次，光擴散板 乂雜有先擴政粒子，而該光擴散粒子為PMMA粒子。 微^，案所揭露的光擴散板或有利用透鏡構造的 透度及光纖效果，·或有將光擴散粒子混於 紐—體細，叫化㈣触，·或有增 尤曰以麩阿売度，·然而就透光度與光擴散效果(霧度）而 201202753 言，由於彼此的物理特性相異(即提高透光度往往必需降低霧 度）’因此前述專利有的利用微透鏡結構或增加螢光增亮層來 提南受度，有的利用光擴散層内的光擴散粒子(粉劑)成份，例 如PMMA^矽，並且搭配其他化合物或聚合物，來提高光的 擴散效果(霧度），藉此而分別提高光擴散板的透光度與光擴散 效果。 然而由以上的說明知道已知的技術中，關於光擴散板的透 光度與光擴散效果（霧度）分別藉由二個不同的材料層來完 成，因此光擴散板的結構較為複雜且製作不方便。201202753 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to the technical field of light diffusing sheets, particularly a light diffusing plate structure having high transparency and high haze. X/' [Prior Art] The light diffusing plate is an optical component that allows the light of a point source or a line source to diffuse into a surface light source state after passing through the light diffusing plate. The light diffusing plate can be applied to a cold cathode tube, a led backlight module, a led indoor and outdoor lighting device, a conventional lighting device or a vehicle lighting device of a liquid crystal display. However, the transmittance of the currently available light diffusing plate is about 60% to 80%, and the uniformity is also insufficient. Therefore, if a light diffusing plate having a known poor light transmittance is used, a waste of electric energy is caused to the light source. Taiwan Patent No. 1274900 discloses a light diffusing plate which increases light diffusion and improves brightness, and mainly produces a microstructure having an optical lens on one side of a substrate; in addition, a light diffusing layer is positioned on the microstructure to enhance light diffusing effect. . In the prior patent, the microstructure of the lenticular lens structure is matched with the light diffusion layer to homogenize the light source; in addition, the substrate having the microstructure is formed while the light diffusion layer is simultaneously formed by the co-extrusion molding technique. On the microstructure. The light diffusing particles of the light diffusing layer are selected from the group consisting of ruthenium, titanium dioxide, sulphur dioxide, and methyl methacrylate. Taiwan Patent No. M294042 discloses a light diffusing plate structure in which a light diffusing layer is bonded to one side or both sides of a substrate. Further, it forms a diffusion layer directly on the substrate to complete the light diffusion plate structure, and achieves a simplified structure. The above substrate is made of plastic material, transparent material or glass material, such as PC (polyphenolate), PMMA (polymethyl methacrylate) or Ms (polymethyl methacrylate); The light diffusion layer comprises a plurality of diffusion particles uniformly coated, sprayed or printed in combination with the substrate; such a refractive index of the refractive index 201202753, the light can be refracted to produce a diffusion effect. However, the patent predecessor diffuses the composition of the particles. Taiwan Patent No. 1,323,791 discloses a light diffusing plate having a plurality of aspherical surface structures, comprising a plate body, and at least one aspherical structure formed on a side of the plate body; in particular, the inside of the plate body is doped with an ultraviolet absorber And light diffusing particles; the light diffusing particles are selected from the group consisting of polycarboxylate resin (pQ, PolyOVTethyl methacrylate, PMMA), methyl methacrylate Ethylene (Methyl methacrylate Styrene, MS), Polystyrene 'PS, Silica, Silicum, Melam, Calcium Carbonate, Teflon, Dioxin Ή〇 2) and dioxide = at least the material group - tearing the material, the light _ _ optical expansion of the remaining 'when causing optical diffusion effect., Taiwan patent 12783_ exposed a light diffuser manufacturing method and in this way A compact light diffusing plate, which is mainly made of PC (polycarbonate, methyl acrylate), and a PC unit plate and a PMMA unit. Combined into high light transmittance, high iSS two, no deformation, quality Light and thin light diffuser. Inside, the expansion of ruthenium oxide or titanium dioxide and doped in PMMA sheet light 3 counties - a kind of high-brightness light board and its process, which see the light city outline lying. Second, The light diffusing plate is doped with first expanding particles, and the light diffusing particles are PMMA particles. The light diffusing plate disclosed in the case may have a transparency and an optical fiber effect by using a lens structure, or may be mixed with light diffusing particles. In New Zealand, the body is thin, called (four) touch, or has increased the degree of bran, but the transparency and light diffusion effect (haze) and 201202753, because of their physical characteristics are different (ie It is often necessary to reduce the haze when increasing the transmittance.] Therefore, some of the aforementioned patents use a microlens structure or a fluorescent brightening layer to increase the degree of southing, and some utilize light diffusing particles (powder) components in the light diffusing layer, for example, for example. PMMA^矽, and with other compounds or polymers, to improve the light diffusion effect (haze), thereby improving the light transmittance and light diffusion effect of the light diffusing plate. However, the known techniques are known from the above description. Medium, about the light transmission of the light diffusing plate The degree of light diffusion (haze) is achieved by two different layers of material, so that the structure of the light diffusing plate is complicated and inconvenient to manufacture.
【發明内容】 的之—在於提供—種具有高透光度及高霧度 ΐίί、政5二二係由一基板一側結合一光擴散層，其中光擴散 ΐΐ 賴散好，並雌光擴散n有適當的 居度，措此可使仔光源在光擴散板上呈現高透光度及高霧度。 的光目的ί於提供一種具有高透光度與高霧度 結構精誠製S便ϊςίδ 4料結合該絲，藉此達到 度及與雜，本創__具有高透光 光擴散舱i二ί、、、。。在基板—側；其中該光擴散層内具有 丙甲r及二擴f粒子的成份至少包含玻璃珠、聚尹基 至3。。_:“較佳:實=光擴散層的厚度介於一 圖式本創作的目的與功效，舉出較佳實施例，並配合 【實施方式】 5 i S2 201202753 睛參閱第】圖’本發明所要揭示的光擴散板IG包含一其 光擴散層14。该光擴散層14結合在該基板〗2的一 更進一步而言 a ^ ^ * -该丞板〗2具有可透光的物理性質，並可SUMMARY OF THE INVENTION The present invention provides a high transmittance and high haze, and a light diffusion layer is bonded from one side of a substrate, wherein light diffusion is good, and female light is diffused. n has a proper degree of residence, so that the light source can exhibit high transparency and high haze on the light diffusing plate. The purpose of the light is to provide a high-transparency and high-haze structure. The S-supplied ίδ 4 material is combined with the wire to achieve the degree and harmony. The __ has a high light transmission diffuser. , ,,. . The substrate-side; wherein the component having the propylene- and di-spreading particles in the light-diffusing layer comprises at least a glass bead and a poly-indenyl group. . _: "Better: real = the thickness of the light diffusion layer is in the context of the purpose of the present invention, and the preferred embodiment, and with the implementation of the method 5 i S2 201202753 The light diffusing plate IG to be disclosed includes a light diffusing layer 14. The light diffusing layer 14 is bonded to the substrate 2, and further a ^ ^ * - the seesaw plate 2 has a light transmissive physical property, And
1疋透一明等級之材質所構成之塑膠基板或玻璃基板。此外基Z nhUfl被定義成入光面i2a，另一側可被定義為出光面 仞卢:光擴散層14結合該入光面12a。一或複數光源30， Lito光*仏的一側’使得光線可以由入光面以進入光擴 麟2散層riff中至少包含複數光擴散粒子16及複數 黏者材枓，例如i外線硬化樹脂18，且光擴散粒子16與 線硬化樹脂18均勻分佈於光擴散層μ。 、 更進一步而§，光擴散粒子丨6的成份至少為玻璃珠(glass bead)、？《甲基丙稀酸甲脂(PMMA)及二氧化石夕_2)等粉劑； 上述的玻璃珠成份可以包含Si〇2、Al2〇3、Ca〇、Mg〇、Fe2〇>3、A plastic substrate or glass substrate made of a material of a certain grade. Further, the base Z nhUfl is defined as the light incident surface i2a, and the other side may be defined as the light exit surface: the light diffusion layer 14 is combined with the light incident surface 12a. One or a plurality of light sources 30, one side of the Lito light*仏 enables light to pass through the light incident surface to enter the light diffusion layer 2, and at least a plurality of light diffusion particles 16 and a plurality of adhesive materials, such as i outer hardening resin, are included. 18, and the light-diffusing particles 16 and the line-hardening resin 18 are uniformly distributed in the light-diffusing layer μ. Further, §, the components of the light-diffusing particles 丨6 are at least glass bead, ? Powders such as methyl methacrylate (PMMA) and dioxide dioxide _2); the above glass bead components may include Si 〇 2, Al 2 〇 3, Ca 〇, Mg 〇, Fe 2 〇 3,
NaaO、K2〇，此外，光擴散粒子16的成份甚至可以參酌前述 專利前案中所提及的成份。_，值得注意的是，本發明之光 擴散粒子16所包含之玻璃珠粉劑未見於各專利前案。 φ 其次光擴散層14的表面可以形成凹凸構造22，如此該光 擴散層14的表面形成不平整表面；當光源3〇的光線投射於該 凹凸構造22時’該凹凸構造22可以提高光線進入該光擴散層 14内的比率。 、 3亥凹凸構造22除了圖式所顯示之不規則狀外，也可以是 規則狀，然而為製作的方便性及減少加工製程，凹凸構造22 以不規則狀即可達到預期的效果。 此外，光擴散層14的厚度也會影響到光擴散板的透光度 與霧度之表現，特別是本發明訴求高透光度及高霧度，因此在 201202753 基板12厚度為0 8mm，且光擴散層14的厚度介於i〇〇^m至 300μιη之間，如此的匹配關係可以獲得較佳的實施效果。 請參閱第2圖，圖中揭露本發明之光擴散板與一般透明基 板對同一光源之透光度表現的比較曲線。其中透明基板的透光 ，約，92% ’而當固定擴散粒子成份中ΡΜΜΑ及叫的合 汁重，為2克並改變玻璃珠(glassbead)成份的重量時，由其曲 線的變化可知擴散粒子的成份中加入玻璃珠 g ϊ;?二透光度;特別是在玻璃珠重量約為2克時， 請參閱第3圖，圖中揭露本發明之光擴散板與—般透明基 之霧度表現的比較曲線。其中透明基板的霧度接 ^於零，、而當固定擴散粒子成份中PMMA& Si〇2的合計重量 二玻璃珠(glassbead)成份的重量時，由其曲線的變 的霧产°擴5二子Λ成份中加入玻璃珠可以明顯提高光擴散板 珠重量約為2克時，其霧度約為96%， 且Ik者玻璃珠重量的增加可以更提高霧度之表現。 =由第2圖及S3目所揭示_線結果可知，在本發明 光牦政層的擴餘子藉巾，PMMA與siQ⑷ 添加玻璃珠之重量比約為〗.]昧，腺1门七 > 里牙所 射動時將可同時提高光擴散板的 产盘 價值；因此本發明改變了傳統高透光 作具透鏡功能的微結構，或是辦役替来 j…而特別裏 社槿之m 螢先層，故本發明具有精簡 時具有高透光度及高霧度的需求。 w足光擴散板同 至於本發明的製作方式，請參閱第4圖 散液調配，其主要是取粉劑依配方比例調配 比= 劑與溶劑混合；上述的粉劑包含玻璃珠(glassbead)將 201202753 烯酸甲脂(PMMA)及二氧化矽(Si〇2);上述的溶劑為乙酸乙 酯、二丙酮醇、異丙醇及紫外線硬化樹脂，且依比例調配。 步驟S42為常溫攪拌’係針對前述之粉劑與溶劑的混合溶NaaO, K2 〇, in addition, the composition of the light-diffusing particles 16 may even refer to the components mentioned in the aforementioned patents. _, it is worth noting that the glass bead powder contained in the light diffusing particles 16 of the present invention is not found in the prior patents. Φ Second, the surface of the light diffusion layer 14 may form the uneven structure 22, such that the surface of the light diffusion layer 14 forms an uneven surface; when the light of the light source 3〇 is projected on the concave and convex structure 22, the concave and convex structure 22 can increase light into the The ratio within the light diffusion layer 14. The 3H bump structure 22 may have a regular shape in addition to the irregular shape shown in the drawings. However, for the convenience of production and the reduction of the processing process, the uneven structure 22 can achieve the desired effect in an irregular shape. In addition, the thickness of the light diffusion layer 14 also affects the transmittance and haze of the light diffusing plate. In particular, the present invention appeals for high transmittance and high haze, so that the thickness of the substrate 12 is 08 mm at 201202753, and The thickness of the light diffusion layer 14 is between i〇〇^m and 300 μm, and such a matching relationship can obtain a better implementation effect. Referring to Fig. 2, there is shown a comparison curve of the transmittance of the same light source of the light diffusing plate of the present invention and a general transparent substrate. The transparent substrate has a light transmission of about 92%'. When the weight of the mixed diffusion particle component is 2 grams and the weight of the glass bead component is changed, the diffusion particle is known by the change of the curve. Adding glass beads g ϊ; 二 two transmittance; especially when the weight of the glass beads is about 2 grams, please refer to FIG. 3, which discloses the haze of the light diffusing plate and the transparent base of the present invention. A comparison curve of performance. Wherein the haze of the transparent substrate is connected to zero, and when the weight of the total weight of the glassbead component of the PMMA & Si〇2 in the fixed diffusing particle component is increased, the haze of the curve is increased by 5 The addition of glass beads to the bismuth component can significantly increase the haze of the light-diffusing sheet when the weight of the beads is about 2 grams, and the haze is about 96%, and the increase in the weight of the glass beads of the Ik can further improve the haze. = As revealed by Fig. 2 and S3, the results of the ray line show that the weight ratio of PMMA to siQ(4) added glass beads is about 〗 〖. When the teeth are launched, the value of the light diffusing plate can be increased at the same time; therefore, the invention changes the traditional high-light transmission lens function micro-structure, or the service is replaced by j... m is the first layer of the firefly, so the invention has the requirement of high transparency and high haze when it is simplified. W foot light diffusing plate is the same as the manufacturing method of the present invention, please refer to the fourth embodiment of the liquid dispensing, which is mainly to take the powder according to the formula ratio ratio ratio agent mixed with the solvent; the above powder contains glass beads (glassbead) will be 201202753 olefin Acid methyl ester (PMMA) and cerium oxide (Si〇2); the above solvents are ethyl acetate, diacetone alcohol, isopropyl alcohol and ultraviolet curing resin, and are formulated in proportion. Step S42 is a normal temperature stirring, which is a mixture of the aforementioned powder and solvent.
錢行授拌，使得粉劑中的各成份能夠均勻分佈。此時已混合 均勻的溶液可稱為光擴散層塗料。 D 步驟S43為塗佈光擴散層塗料，其係取一已清洗乾淨的美 板，並且將光擴散層塗料以塗佈方式塗佈於基板表面。除了 ς $佈方式將光擴散層塗料加在基板表面外，也可以藉由印刷方 式、減鍍方式使光擴散層結合於基板表面。 ，^至’可先將光擴散層塗料製作成光擴散層薄膜，然後 再以黏貼方式，將光擴散層薄膜黏貼於基板表面。 多餘為加熱供烤’其主要是藉由加熱過程將溶液中的 ΜίΙΓϋίί硬化’其主要是將已除去水份的基板與光 料麟，料祕鎌散紫外線 ’曰°以硬化’使得光擴散層形成薄膜狀且黏固於基板表 此外，ϋίί 行’即可以獲得—光擴散板的成品； 擴散層的厚度，可以在完成步驟s45後，再重 覆乂驟S43至步驟S45，使其滿足光擴散層所須之較佳厚度。 ^以板的製作簡便’而且在步驟S43至步驟S45， 程。只0、一側自然地形成凹凸構造，無需再額外增加製 的光以特定成份的光擴散粒子混A光擴散板 外本發明可藉由塗佈*式使光擴散層與 基板W ’其製作方式簡便而且適用於大面積之基板。 201202753 以上乃本發明之較佳實施例以及設計圖式，惟較佳實施例 以及設計圖式僅是舉例說明，並非用於限制本發明技藝之權利 範圍，凡以均等之技藝手段、或為下述「申請專利範圍」内容 所涵蓋之權利範圍而實施者，均不脫離本發明之範疇而為申請 人之權利範圍。 【圖式簡單說明】 第1圖係本發明之光擴散板結構示意圖；The money is mixed to make the ingredients in the powder evenly distributed. A solution that has been mixed at this time can be referred to as a light diffusion layer coating. D Step S43 is a coating of a light diffusion layer coating which is obtained by taking a cleaned sheet and applying the light diffusion layer coating to the surface of the substrate in a coating manner. In addition to the 布 $ cloth method, the light diffusion layer coating is applied to the surface of the substrate, and the light diffusion layer can be bonded to the surface of the substrate by printing or plating. , ^ to ' can be first made of a light diffusion layer coating into a light diffusion layer film, and then adhered to the light diffusion layer film adhered to the surface of the substrate. Excessive heating for roasting' is mainly to harden the 中 ΙΓϋ ΙΓϋ 溶液 ' ' ' ' ' 其 其 其 其 其 其 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化 硬化Forming a film and sticking to the substrate, in addition, the product of the light diffusing plate can be obtained. The thickness of the diffusion layer can be repeated after step s45 to repeat step S43 to step S45. The preferred thickness of the diffusion layer. ^ It is simple to make the board' and it is in steps S43 to S45. Only 0, one side naturally forms a concavo-convex structure, and there is no need to additionally add light to a specific component of the light-diffusing particles mixed with the A-light diffusing plate. The present invention can be made by coating the light-diffusing layer and the substrate W' The method is simple and suitable for large-area substrates. 201202753 The above is a preferred embodiment and a design of the present invention, but the preferred embodiments and the design drawings are merely illustrative and are not intended to limit the scope of the present invention. The scope of the rights covered by the contents of the "Scope of Patent Application" is not intended to be within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of a light diffusing plate of the present invention;
第2圖係本發明之光擴散板與一般透明基板 光度表現的比錢線； 九原錢 霧 第3圖係本發明之光擴散板與一般透明基板對同一光、原之 度表現的比較曲線； ' 第4圖係本發明之製作流程圖 【主要元件符號說明】 12基板 12b出光面 16光擴散粒子 22凹凸構造 10光擴散板 12a入光面 14光擴散層 18紫外線硬化樹脂 30光源2 is a comparison of the illuminance performance of the light diffusing plate of the present invention and a general transparent substrate; FIG. 3 is a comparison curve of the same light and original performance of the light diffusing plate of the present invention and a general transparent substrate. Fig. 4 is a flow chart of the present invention. [Description of main components and symbols] 12 substrate 12b light-emitting surface 16 light-diffusing particles 22 concave-convex structure 10 light-diffusing sheet 12a light-in surface 14 light-diffusion layer 18 ultraviolet-curable resin 30 light source