M343790 ^八、新型說明： ^ . 【新型所屬之技術領域】 本創作有關於光擴散膜之結構，特別是關於用於例如 液晶顯示器（LCD)之平面顯示器之背光模組之自體發光擴 5 散膜之結構。 【先前技術】 一種習知之光擴散元件係於透明基板之上表面形成一 _ 具粗糙度之表面結構，使光線通過時造成散射現象，進而 ° 達到光線擴散的功能。另一習知光擴散元件係於透明基板 的上表面設置一擴散層，該擴散層包括多個擴散粒子及粘 著物，該等擴散粒子係可埋入粘著物或凸出於粘著物，以 形成一具粗糙度之表面，光線經由該擴散層向外射出時， 5 即可造成光線擴散之功能，其中該擴散粒子為透明之自然 5 成型之球狀物，依據透鏡原理，於聚焦後，亦可將光線予 以擴散。 • 、由上述之習知技藝可知，擴散元件其原理主要在於形 ^細緻的表面粗糙度或透鏡原理，用以提供均勻光線之擴 〇 j功旎，然光線在通過時會經過基板、多個擴散粒子與粘 者物，而因受到這些物質的吸收，使光線利用率、 輝度亦為降低。 - α ρ τΛ外’於習知f域組中做為光源之白色發光二極體 )夕採用藍光LED以補色原理，加上黃色榮光體製 ς ，由於缺乏紅色，故演色性(CRI)不佳。 、 M313 790 ^ 【新型内容】 ^ 本創作之一目的係藉由於擴散層中摻入螢光化合 物，利用一具特定波長之光線來激發其螢光化合物，使其 自體可發出至少-具另-特定波長之光線，使可視角度及 5 光線均齊度更為I廣一致，並進而提升其輝度。 本創作之另一目的，係藉由螢光化合物色彩混合之控 制，可轉換其透射後之光線色度，可用以改善習知背光模 組使用以藍黃光補色原理製成之白色LED之演色性不佳 的缺失。 1〇 依本創作之一方面，一種光擴散發光元件包含·· 一透 明基板，具有第-表面及與第一表面相對之第二表面；以 及一螢光層，形成於透明基板之第一表面上玄營光声 :㈣先化合物，該勞光化合物可被-二長 激赉，藉此發出至少一具第二波長之光線。 15 、依本創作之另―方面，—種光擴散發光元件包含：- 透=基板，具有第一表面及與第一表面相狀第二表面； •—螢光發光層，形成於基板之第-表面上，該S光發光層 具有螢光化合物，該螢光化合物可被一具第一 所激發，、藉此發出至少-具第二波長之光線；以及一= 20 @ ’ ％成於該螢光發光層之相對於透明基板第-表面之表 面上’該擴散層具有擴散粒子。 【實施方式】 明確本創作之上述之目的、功能特徵、和優點能裏 月確破瞭解’下文將本創作以較佳之實例，並配合所附圏 25M343790 ^VIII. New description: ^ . [New technical field] This work relates to the structure of light diffusion film, especially to the self-luminous illumination of a backlight module for a flat panel display such as a liquid crystal display (LCD). The structure of the film. [Prior Art] A conventional light diffusing element is formed on a surface of a transparent substrate to form a surface structure having a roughness, which causes a scattering phenomenon when light passes through, and further a function of diffusing light. Another conventional light diffusing element is provided with a diffusion layer on the upper surface of the transparent substrate, the diffusion layer comprising a plurality of diffusion particles and an adherent, the diffusion particles being embedded in the adhesive or protruding from the adhesive to Forming a rough surface, when light is emitted outward through the diffusion layer, 5 can cause light to diffuse, wherein the diffusion particle is a transparent natural 5 shaped ball, according to the lens principle, after focusing, Light can also be diffused. • According to the above-mentioned conventional techniques, the principle of the diffusing element is mainly the shape of the surface roughness or the principle of the lens, which is used to provide the function of uniform light, but the light passes through the substrate and multiple Diffusion particles and sticky objects, and due to the absorption of these substances, light utilization and brightness are also reduced. - α ρ τ Λ ' 于 于 习 习 习 习 习 习 习 习 习 习 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 采用 采用 采用 采用 采用 采用 采用 采用 采用. M313 790 ^ [New Content] ^ One of the purposes of this creation is to use a specific wavelength of light to excite its fluorescent compound by incorporating a fluorescent compound into the diffusion layer, so that it can emit at least one another. - Light of a specific wavelength makes the viewing angle and the uniformity of the 5 rays uniform, and thus enhances the brightness. Another purpose of the creation is to control the chromaticity of the transmitted light by controlling the color mixing of the fluorescent compound, which can be used to improve the color rendering of the white LED made by the conventional backlight module using the blue-yellow complementary color principle. The lack of sexuality. According to one aspect of the present invention, a light-diffusing light-emitting element includes: a transparent substrate having a first surface and a second surface opposite to the first surface; and a phosphor layer formed on the first surface of the transparent substrate Shang Xuanying Light Sound: (4) The first compound, the working light compound can be excited by - two long, thereby emitting at least one light of a second wavelength. 15. According to another aspect of the present invention, a light diffusing light emitting device comprises: - a transparent substrate having a first surface and a second surface opposite to the first surface; - a fluorescent emitting layer formed on the substrate - surface, the S-light emitting layer has a fluorescent compound, the fluorescent compound can be excited by a first one, thereby emitting at least a light having a second wavelength; and a = 20 @ '% is formed in the The diffusion layer has diffusing particles on the surface of the phosphorescent layer relative to the first surface of the transparent substrate. [Embodiment] It is clear that the above-mentioned purposes, functional features, and advantages of the present creation can be understood in the following months. [The following is a better example of the creation, and the accompanying 圏 25
15 20 M313790 式’作詳細說明如下。 明麥照第1圖為本創作第一實施例之光擴散發光元件 之結構示意圖，該光擴散發光元件包括有一透光之基板 11，基板11分別具有一上表面lla及一下表面llb。在基 板11之上表面lla上可利用塗佈方式形成一透明之可紫外 、、泉(uv),固化之螢光層12。螢光層12包含螢光體黏著物 12七，並可包含擴散粒子12a，螢光體黏著物i2b包含螢光 化合，及黏著物’擴散粒子12a係藉由螢光體黏著物咖 口著至基板Π之上表面11 a，於下表面lib上則設置一 抗靜電層14。 、，當特定波長之光線例如波長約為40〇11111至76〇11111之可 ，光或波長約為2〇〇nm至38〇nm的紫外光(uv)射入時，部 分光線可經由擴散粒子12&及$光體黏著物⑶而通過: 而部分光線與螢光體結合後，激發出至少—種 長約為_nwm之先線，使該光擴散 :提升，擴勻一更:產生自艘發光’使輝度更 =及擴散光模=== 該:匕較::：式为光杈組於光線輝度與均齊度之比較。由 線均‘ ^二使f本創作之$細散片m模組之光 較習二高，料㈣度勘 先線也比h者分偶自，發出之 25 M313790 、表1 試驗項目 單位 測定值 測定方法 總厚 μπι 160 土 10% 基材厚度 μιη 100 色度變化 色度X 0.264±0.04 色度Υ 0·284±0·04 CRI(演色j生） 85 〜95 财燃性 〜 ΟΚ UL94 VTM-2 加熱 收縮率(heat shrinkage) MD (縱） % 0.9 ASTMD1204 150°C TD (橫） % 0.1 ASTMD1204 150°C 張力(tensile strength) MD (縱） Kg/m m2 23.2 ASTMD882 TD (橫） Kg/m m2 25.5 ASTM D882 伸長率 (elongation at break) MD (縱） % 191 ASTM D882 (JIS2151) TD (橫） % 174 ASTM D882 (JIS2151) 表面電阻 Ω ^ 1012 JISK6911 15吋側光式模組 (白光CCFL+菱鏡片(2pcs)+ 上擴散片+下擴散片） 中心 輝度 3750 九點 均齊度 89% 15吋側光式模組 (UV-CCFL+螢光擴散片） 中心 輝度 3625 九點 均齊度 96%15 20 M313790 The formula is described in detail below. 1 is a schematic structural view of a light-diffusing light-emitting element according to a first embodiment of the present invention, the light-diffusing light-emitting element includes a light-transmissive substrate 11, and the substrate 11 has an upper surface 11a and a lower surface 11b, respectively. A transparent ultraviolet, uv, and cured phosphor layer 12 can be formed on the upper surface 11a of the substrate 11 by coating. The phosphor layer 12 comprises a phosphor adherend 12 and may comprise diffusing particles 12a, the phosphor adherent i2b comprises a fluorescent compound, and the adhesive 'diffusion particles 12a are adhered to by the phosphor adhesive The upper surface 11 a of the substrate , is provided with an antistatic layer 14 on the lower surface lib. When a specific wavelength of light, for example, a wavelength of about 40 〇 11111 to 76 〇 11111, light or a wavelength of ultraviolet light (UV) having a wavelength of about 2 〇〇 nm to 38 〇 nm is incident, part of the light may pass through the diffusion particle. 12& and $photo-adhesive (3) pass: and part of the light combines with the phosphor to excite at least a line that is about _nwm long, allowing the light to spread: lift, spread even more: from The light of the ship makes the brightness more = and the diffused light mode === The: 匕 comparison::: is the comparison of the light intensity and the uniformity of the light group. From the line average ' ^ two to make f the creation of the thin film m module light is higher than the second high, the material (four) degree survey line is also better than the h person, from the 25 M313790, Table 1 test project unit determination Value measurement method Total thickness μπι 160 Soil 10% Substrate thickness μιη 100 Chromaticity change chromaticity X 0.264±0.04 Chroma Υ 0·284±0·04 CRI (coloring j raw) 85 ～ 95 flammability ~ ΟΚ UL94 VTM -2 Heat shrinkage MD (vertical) % 0.9 ASTMD1204 150°C TD (horizontal) % 0.1 ASTMD1204 150°C Tensile strength MD (vertical) Kg/m m2 23.2 ASTMD882 TD (horizontal) Kg/ m m2 25.5 ASTM D882 elongation at break MD (longitudinal) % 191 ASTM D882 (JIS2151) TD (horizontal) % 174 ASTM D882 (JIS2151) Surface resistance Ω ^ 1012 JISK6911 15吋 side optical module (white light CCFL+ Diamond lens (2pcs) + upper diffuser + lower diffuser) Center luminance 3750 9 points uniformity 89% 15吋 side light module (UV-CCFL + fluorescent diffuser) Center luminance 3625 9 points uniformity 96%
請參照第2圖為本創作第二實施例之光擴散發光元件 M313790 之結構示意圖，與第—實施例之主要差別在於，發光體發 光層22與擴散層23為獨立結構，螢光體發光層22包括螢 光化合物及㈣物’擴制Μ包括擴餘子及黏著物，其 中螢光體發光層22之厚度約為4〇〜5〇gm，擴散層23之厚 度約為15〜20μηι。當入射光線為紫外線時，可完全被螢光 發光層22吸收，並激發出至少一種波長可視光線，例如波 長約為400nm至760nm之可視光線。 本創作之光擴散發光膜可利用下列方式製成： 1β於基片一表面以塗佈方式形成一抗靜電層，並加以烘 烤固化。 2·調製一螢光體塗膠，此螢光體塗膠係由紅、綠、藍之 三種氧化辞族螢光體粉末，其亦可為氧化釔、氧化鑭 等稀土族之氧化物，與一加入光引發劑而可紫外線 (UV)固化之聚合物與溶劑均勻混合而成；該聚合物可 為聚苯乙烯、聚曱基丙烯酸曱酯、聚碳酸酯、聚乙烯、 聚丙烯、聚氯乙烯、環氧樹脂、聚對苯二曱酸乙二酯 等光學塑膠材料。 3·選擇15μπι〜80μπι大小之擴散粒子，混入螢光體塗膠 内並充分擾拌；該擴散粒子可為聚苯乙烯、聚甲基丙 烯酸甲酯、聚碳酸酯、聚乙烯、聚丙烯、聚氯乙烯、 環氧樹脂、聚乳酸、聚對苯二甲酸乙二酯、二氧化矽、 三氧化二鋁等材料。 4·以塗佈方式，較佳地以薄膜塗佈之輥輪傳輸(ROLL· TO ROLL)方式，使基片另一表面塗佈一層混有擴散 粒子之螢光體塗膠’再藉由紫外光燈照射，產生聚合 M313790 作用，使其固化於該基片表面上。 5.該螢光擴散層除紫外光固化外，亦可運用烘烤方式進 行固化，其溫度約為攝氏70度〜120度。 【圖式簡單說明】 第1圖為本創作第一實施例結構示意圖。 第2圖為本創作第二實施例結構示意圖。2 is a schematic structural view of the light-diffusing light-emitting element M313790 according to the second embodiment of the present invention. The main difference from the first embodiment is that the illuminant-emitting layer 22 and the diffusion layer 23 are independent structures, and the phosphor-emitting layer is formed. 22 includes a fluorescent compound and (4) 'expanded Μ including a remnant and an adhesive, wherein the phosphor light-emitting layer 22 has a thickness of about 4 〇 to 5 〇 gm, and the diffusion layer 23 has a thickness of about 15 〜 20 μm. When the incident light is ultraviolet light, it is completely absorbed by the fluorescent light-emitting layer 22 and excites at least one wavelength visible light such as visible light having a wavelength of about 400 nm to 760 nm. The light diffusing luminescent film of the present invention can be produced by the following method: 1β is formed on the surface of a substrate by coating to form an antistatic layer and baked and cured. 2. modulating a phosphor coating, the phosphor coating is composed of three kinds of red, green and blue oxidized phosphor powders, which may also be oxides of rare earths such as cerium oxide and cerium oxide, and A UV-curable polymer is uniformly mixed with a solvent by adding a photoinitiator; the polymer may be polystyrene, polydecyl methacrylate, polycarbonate, polyethylene, polypropylene, polychlorinated Optical plastic materials such as ethylene, epoxy resin and polyethylene terephthalate. 3. Select a diffusion particle of 15μπι~80μπι size, mix it into the phosphor coating and fully disturb it; the diffusion particle can be polystyrene, polymethyl methacrylate, polycarbonate, polyethylene, polypropylene, poly Materials such as vinyl chloride, epoxy resin, polylactic acid, polyethylene terephthalate, cerium oxide, and aluminum oxide. 4, in a coating manner, preferably by a film coating roller transfer (ROLL TO ROLL) method, the other surface of the substrate is coated with a layer of phosphor coated with diffusion particles 'by UV The light is illuminated to produce a polymeric M313790 that cures to the surface of the substrate. 5. The fluorescent diffusion layer can be cured by baking in addition to ultraviolet curing, and the temperature is about 70 to 120 degrees Celsius. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic structural view of a first embodiment of the present invention. Figure 2 is a schematic view showing the structure of the second embodiment of the creation.
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【主要元件符號說明】 11 基板 11a 基板上表面 lib 基板下表面 12 螢光層 12a 擴散粒子 12b 螢光體黏著物 14 抗靜電層 21 基板 21a 基板上表面 21b 基板下表面 22 螢光體發光層 23 擴散層 24 抗靜電層 20[Main component symbol description] 11 Substrate 11a Substrate upper surface lib Substrate lower surface 12 Fluorescent layer 12a Diffusion particles 12b Phosphor adherend 14 Antistatic layer 21 Substrate 21a Substrate upper surface 21b Substrate lower surface 22 Phosphorescent light emitting layer 23 Diffusion layer 24 antistatic layer 20