201137414 【發明所屬之技術領域】 本發明係關於一種具光擴散功能偏光板結構以及使用此 偏光板結構之液晶模組，具體而S，本發明係關於一種具光擴 散功能偏光板結構以及使用此偏光板結構之液晶顯示器液晶 模組。 【先前技術】 液晶顯示器（Liquid Crystal Display, LCD)廣泛應用在電 月®、電視、以及行動電活荨各種電子產品上。液晶模組（liquid crystal module)是液晶顯示器重要組成元件之一。液晶模組之 輝度均勻度是判斷其效能的重要指標，較高的液晶模組輝度均 勻度可提升液晶顯示器的顯示效果。 如圖1所示，習知液晶模組8〇包含由下而上依序設置之 光學膜50、光擴散層60、下偏光板10、下感壓膠層3〇、液晶 層40、上感壓膠層70以及上偏光板9〇。其中，習知液晶模組 80係藉由光擴散層60以提高其輝度均勻度。然而，光擴散層 60之設置不僅會使液晶模組8〇之厚度增加，亦會提高製程的 複雜度，造成良率降低。以上使用光擴散層6〇以提高液晶模 組輝度均勻度之方式有改善的空間。 【發明内容】 本發月之主要目的為提供_種具光擴散功能偏光板結 構，供液晶额使用’具有猶散之功效。 3 201137414 本發明之另一目的為提供一種液晶模組，具有較薄的厚 度。 本發明之另一目的為提供一種液晶模組，具有較簡化之製 程。 本發明之具光擴散功能偏光板結構較佳係供液晶顯示器 使用。具光擴散功能偏光板結構包含偏光板以及光擴散感壓膠 層。光擴散祕縣設置職光板上，包含感歸及複數個光 擴散粒子。具光擴散功能偏光板結構，進一步包含光學膜與離 型劑，係設置於光擴散感壓膠層上。光學膜係為聚對苯二甲酸 乙二醇酯（p〇lyethylene terephthalate，PET )。 感壓膠包含為聚胺甲酸脂（polyurethane，pu)、聚甲基丙 烯酸甲酯（poly methyl methacrylate，PMMA)、聚苯乙烯 (polystyrene，PS )、聚矽酸（p〇iysiiica acid )、熱熔膠（h〇t meit) 或其混合物。光擴散粒子包含為聚曱基丙烯酸曱酯、聚苯乙 烯、矽氧樹脂(silicone)、二氧化矽（silica )、聚乙烯(polyethylene， PE)或其混合物β光擴散粒子之粒徑範圍係介於〇.ium〜5〇um。 感壓膠及光擴散粒子之重量比係介於001%〜750/0。 具光擴散功能液晶模組係供液晶顯示器使用，包含前述由 下偏光板及光擴散感壓膠層組成之具光擴散功能偏光板結 構、液晶層、上感壓膠層以及上偏光板。液晶層設置於光擴散 感壓膠層上。上感壓膠層設置於液晶層上。上偏光板設置於上 感壓膠層上。 【實施方式】 201137414 如圖2所示之實施例，本發明之具光擴散功能偏光板結構 200包含偏光板100以及光擴散感壓膠層300。光擴散感壓膠 層300設置於偏光板100上，包含感壓膠310及複數個光擴散 粒子330。其中，感壓膠310包含為聚胺曱酸脂、聚曱基丙烯 酸曱酯、聚苯乙烯、聚矽酸、熱溶膠或其混合物，且較佳係為 聚曱基丙烯酸曱酯。光擴散粒子包含為聚曱基丙烯酸曱酯、聚 苯乙烯、矽氧樹脂、二氧化矽、聚乙烯或其混合物。光擴散粒 子330之粒徑範圍係介於O.lum〜50um。感壓膠310及光擴散 粒子330之重量比係介於0.01%〜75%。其中，光擴散感壓膠 層300 ’亦即混合後之感壓膠310及光擴散粒子330，可使用 刷塗、刮塗、旋塗或喷塗等方式塗佈於偏光板1〇〇上以形成具 光擴散功能偏光板結構200。藉由光擴散感壓膠層3〇〇中的光 擴散粒子330，具光擴散功能偏光板結構2〇〇可具有光擴散之 功效。 如圖3所示之實施例’本發明之具光擴散功能偏光板結構 200可進一步包含光學膜500，設置於光擴散感壓膠層3〇〇上。 其中，光學膜500較佳係^聚對苯二甲酸乙二醇醋。然而在不 同實施例巾’光學膜之材料可自聚乙烯（pGlye%lene， PE ) t曱基丙烯酸曱酯、聚碳酸脂（p〇iy-carb〇nate，）、聚 苯乙烯或其混和物等透光材射選擇，並在該光轉與光 擴散感壓膠層3〇〇之間有離型層存在。其中，光學膜娜搭配 離型層是較佳侧以防污及防止光擴散祕膠層·沾黏污 物，可輕易斯除，並黏貼於液晶模組上。 如圖4所示’本發明之具光擴散功能偏光板結構200較佳 201137414 係供液晶顯示器使用。具體而言，具光擴散功能偏光板結構 200較佳係供液晶顯示器之液晶模組800使用。其中，液晶模 組800包含下偏光板1⑻、光擴散感壓膠層300、液晶層400、 上感壓膠層700以及上偏光板900。液晶層4〇〇設置於光擴散 感壓膠層300上。上感壓膠層700設置於液晶層4〇〇上。上偏 光板900設置於上感壓膠層7〇〇上。其中，下偏光板1〇〇及光 擴散感壓膠層300之組合即為前述圖2中所示之具光擴散功能 偏光板結構200。上感壓膠層700包含為聚胺曱酸脂、聚甲基 丙烯酸曱酯、聚苯乙烯、聚矽酸、熱熔膠或其混合物，且較佳 係為聚曱基丙烯酸曱酯。相較於圖丨所示之習知液晶模組8〇， 使用本發明具光擴散功能偏光板結構200之液晶模組800之光 擴散效果係藉由光擴散感壓膠層300達成，故可省去圖丨中光 擴散層60之設置。換言之，使用本發明具光擴散功能偏光板 結構200之液晶模組800可具有較薄的厚度以及較簡化之製 程。 在較佳實施例中，液晶模組8〇〇之組配方式係為在液晶層 400之上下兩側分別以上感壓膠層7〇〇及光擴散感壓膠層3〇〇 黏附上偏光板900及下偏光板〗00。具體而言，上偏光板9〇〇 係先在一側設置上感壓膠70〇，然後藉由上感壓膠7〇〇黏附於 液晶層之上侧〇相對的，下偏光板1〇〇係先在一側設置光擴散 感壓膠層300，然後藉由光擴散感壓膠層3〇〇黏附上偏光板 900。其中，設置有光擴散感壓膠層3〇〇之下偏光板ι〇〇可如 圖3所示以.光學膜5〇〇保護。在不同實施例中，亦可先在液晶 層400之上下兩側分別設置上感壓膠層7〇〇及光擴散感壓膠層 201137414 300 ’然後再將上偏光板900及下偏光板100黏附於上感壓膠 層700及光擴散感壓膠層300之外側。 以下進一步說明本發明具光擴散功能偏光板結構200之 光擴散效果。如圖5所示，使用輝度計（未繪示）量測一液晶 面板組合上各點間距為1公分之15個點Pi至P15。其中，對 知貫驗組之實驗不意圖如圖6A所不，液晶層400上下兩側分 別設有上偏光板900及下偏光板100，下偏光板100上方再設 置習知下感壓膠30 ’光線409由下偏光板100下方往上射入。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarizing plate structure having a light diffusing function and a liquid crystal module using the polarizing plate structure. Specifically, the present invention relates to a polarizing plate structure having a light diffusing function and using the same Liquid crystal display liquid crystal module with polarizing plate structure. [Prior Art] Liquid crystal displays (LCDs) are widely used in various electronic products such as Electric Moon®, TV, and mobile phones. A liquid crystal module is one of the important components of a liquid crystal display. The brightness uniformity of the liquid crystal module is an important indicator for judging its performance. The higher uniformity of the brightness of the liquid crystal module can improve the display effect of the liquid crystal display. As shown in FIG. 1 , the conventional liquid crystal module 8 includes an optical film 50, a light diffusion layer 60, a lower polarizing plate 10, a lower pressure-sensitive adhesive layer 3, a liquid crystal layer 40, and a top layer which are sequentially disposed from bottom to top. The rubber layer 70 and the upper polarizing plate 9 are. The conventional liquid crystal module 80 is improved in brightness uniformity by the light diffusion layer 60. However, the arrangement of the light diffusion layer 60 not only increases the thickness of the liquid crystal module 8 but also increases the complexity of the process, resulting in a decrease in yield. There is room for improvement in the above manner in which the light diffusion layer 6 is used to improve the luminance uniformity of the liquid crystal module. SUMMARY OF THE INVENTION The main purpose of this month is to provide a structure of a polarizing plate having a light diffusing function, which is used for the liquid crystal amount to have a function of being scattered. 3 201137414 Another object of the present invention is to provide a liquid crystal module having a relatively thin thickness. Another object of the present invention is to provide a liquid crystal module having a simplified process. The light diffusing function polarizing plate structure of the present invention is preferably used for a liquid crystal display. The polarizing plate structure with light diffusion function includes a polarizing plate and a light diffusion pressure sensitive adhesive layer. Light diffuse secret county set up on the job board, containing the sense of return and a plurality of light diffusing particles. The light diffusing function polarizing plate structure further comprises an optical film and a releasing agent, and is disposed on the light diffusion pressure sensitive adhesive layer. The optical film is p〇lyethylene terephthalate (PET). The pressure sensitive adhesive comprises polyurethane (pu), polymethyl methacrylate (PMMA), polystyrene (PS), polydecanoic acid (p〇iysiiica acid), and hot melt. Gum (h〇t meit) or a mixture thereof. The light-diffusing particles comprise a particle size range of β-light-diffusing particles of polydecyl methacrylate, polystyrene, silicone, silica, polyethylene, or a mixture thereof. Yu Yu.ium~5〇um. The weight ratio of the pressure sensitive adhesive to the light diffusing particles is between 001% and 750/0. The liquid crystal module with light diffusion function is used for a liquid crystal display, and comprises a light diffusing function polarizing plate structure composed of a lower polarizing plate and a light diffusing pressure sensitive adhesive layer, a liquid crystal layer, an upper pressure sensitive adhesive layer and an upper polarizing plate. The liquid crystal layer is disposed on the light diffusion pressure sensitive adhesive layer. The upper pressure sensitive adhesive layer is disposed on the liquid crystal layer. The upper polarizing plate is disposed on the upper pressure sensitive layer. [Embodiment] 201137414 As shown in Fig. 2, the light diffusing function polarizing plate structure 200 of the present invention comprises a polarizing plate 100 and a light diffusing pressure sensitive adhesive layer 300. The light diffusion pressure sensitive adhesive layer 300 is disposed on the polarizing plate 100 and includes a pressure sensitive adhesive 310 and a plurality of light diffusing particles 330. Wherein, the pressure sensitive adhesive 310 comprises polyamine phthalate, polydecyl methacrylate, polystyrene, polydecanoic acid, hot sol or a mixture thereof, and is preferably polydecyl methacrylate. The light-diffusing particles are comprised of polydecyl methacrylate, polystyrene, an anthracene resin, cerium oxide, polyethylene or a mixture thereof. The particle size range of the light diffusing particles 330 is between 0. lum and 50 um. The weight ratio of the pressure sensitive adhesive 310 to the light diffusing particles 330 is between 0.01% and 75%. The light diffusion pressure sensitive adhesive layer 300 ′, that is, the mixed pressure sensitive adhesive 310 and the light diffusing particles 330 , can be applied to the polarizing plate 1 by brushing, blade coating, spin coating or spraying. A polarizing plate structure 200 having a light diffusing function is formed. The light-diffusing function polarizing plate structure 2 can have the effect of light diffusion by the light diffusing particles 330 in the light-diffusing pressure-sensitive adhesive layer 3 . The light diffusing function polarizing plate structure 200 of the present invention may further comprise an optical film 500 disposed on the light diffusing pressure sensitive adhesive layer 3〇〇. Among them, the optical film 500 is preferably polyethylene terephthalate. However, in different embodiments, the material of the optical film may be derived from polyethylene (pGlye%lene, PE) t-mercapto acrylate, polyacrylate (p〇iy-carb〇nate), polystyrene or a mixture thereof. The light-transmitting material is selected, and a release layer exists between the light-transfer and the light-diffusing pressure-sensitive adhesive layer 3〇〇. Among them, the optical film Na with the release layer is the preferred side to prevent contamination and prevent the light from diffusing the adhesive layer and the dirt, which can be easily removed and adhered to the liquid crystal module. As shown in Fig. 4, the light diffusing function polarizing plate structure 200 of the present invention is preferably used for a liquid crystal display. Specifically, the light diffusing plate structure 200 having a light diffusing function is preferably used for the liquid crystal module 800 of the liquid crystal display. The liquid crystal module 800 includes a lower polarizing plate 1 (8), a light diffusion sensitive adhesive layer 300, a liquid crystal layer 400, an upper pressure sensitive adhesive layer 700, and an upper polarizing plate 900. The liquid crystal layer 4 is disposed on the light diffusion pressure sensitive adhesive layer 300. The upper pressure sensitive adhesive layer 700 is disposed on the liquid crystal layer 4A. The upper polarizing plate 900 is disposed on the upper pressure sensitive adhesive layer 7〇〇. The combination of the lower polarizing plate 1〇〇 and the light diffusing pressure sensitive layer 300 is the light diffusing function polarizing plate structure 200 shown in FIG. 2 described above. The upper pressure-sensitive adhesive layer 700 is comprised of polyamine phthalate, polymethyl methacrylate, polystyrene, polydecanoic acid, hot melt adhesive or a mixture thereof, and is preferably polydecyl methacrylate. The light diffusion effect of the liquid crystal module 800 using the light diffusing function polarizing plate structure 200 of the present invention is achieved by the light diffusing pressure sensitive adhesive layer 300, as compared with the conventional liquid crystal module 8 shown in FIG. The arrangement of the light diffusion layer 60 in the figure is omitted. In other words, the liquid crystal module 800 using the light diffusing function polarizing plate structure 200 of the present invention can have a thinner thickness and a simplified process. In a preferred embodiment, the liquid crystal module 8 is assembled in such a manner that the upper and lower layers of the liquid crystal layer 400 are respectively coated with a pressure sensitive layer 7 and a light diffusion sensitive layer 3, and a polarizing plate is adhered. 900 and lower polarizer 00. Specifically, the upper polarizing plate 9 is first provided with a pressure sensitive adhesive 70 在 on one side, and then adhered to the upper side of the liquid crystal layer by the upper pressure sensitive adhesive 7 ,, and the lower polarizing plate 1 〇〇 The light diffusion pressure sensitive adhesive layer 300 is first disposed on one side, and then the polarizing plate 900 is adhered by the light diffusion pressure sensitive adhesive layer 3〇〇. Wherein, the polarizing plate ι 设置 disposed under the light diffusing pressure sensitive adhesive layer 3 can be protected by the optical film 5 所示 as shown in FIG. 3 . In different embodiments, the upper pressure sensitive adhesive layer 7〇〇 and the light diffusion pressure sensitive adhesive layer 201137414 300′ may be respectively disposed on the upper and lower sides of the liquid crystal layer 400, and then the upper polarizing plate 900 and the lower polarizing plate 100 are adhered. It is on the outer side of the upper pressure sensitive adhesive layer 700 and the light diffusion pressure sensitive adhesive layer 300. The light diffusion effect of the light diffusing function polarizing plate structure 200 of the present invention will be further described below. As shown in Fig. 5, 15 points Pi to P15 of a pitch of 1 cm on each liquid crystal panel combination were measured using a luminance meter (not shown). In the experiment, the experiment is not intended to be as shown in FIG. 6A. The upper and lower polarizing plates 900 and the lower polarizing plate 100 are respectively disposed on the upper and lower sides of the liquid crystal layer 400, and the lower pressure sensitive adhesive 30 is disposed above the lower polarizing plate 100. The light ray 409 is incident upward from below the lower polarizing plate 100.
輝度計（未繪示）以方向401量測圖5所示各點的輝度。實驗 組之貫驗不意圖如圖6B所不’液晶層400上下兩側分別設有 上偏光板900及下偏光板100 ’下偏光板1〇〇上方則再設置光 擴散感壓膠層300，光線409由下偏光板1〇〇下方往上射入。 輝度計（未繪示）以方向401量測圖5所示各點的輝度。其中， 下偏光板100及下方設置之光擴散感壓膠層300即為本發明具 光擴散功能偏光板結構200。光擴散感壓膠層3〇〇之霧度係為 80%。 、*、、' 對照組及實驗組之輝度里測結果分別如下表1及表2所 示0 表1A luminance meter (not shown) measures the luminance of each point shown in FIG. 5 in direction 401. The experiment of the experimental group is not intended to be as shown in FIG. 6B. The upper and lower polarizing plates 900 and the lower polarizing plate 100 are respectively disposed on the upper and lower sides of the liquid crystal layer 400. The light diffusing pressure sensitive adhesive layer 300 is further disposed above the lower polarizing plate 1 . The light ray 409 is incident from below the lower polarizing plate 1 . A luminance meter (not shown) measures the luminance of each point shown in FIG. 5 in direction 401. The lower polarizing plate 100 and the light diffusing pressure sensitive adhesive layer 300 disposed underneath are the light diffusing function polarizing plate structure 200 of the present invention. The haze of the light diffusion pressure sensitive adhesive layer is 80%. The results of the luminance measurements of the control group and the experimental group are shown in Table 1 and Table 2 below. Table 1
7 201137414 表2 點 Pi ·™~ 一 p3 P4 P5 輝度（cd/m2) 155.9 130.7 138.8 133,8 130.8 · 點 P6 Pg 1 P9 PlO 輝度（cd/m2) 125.8 _J70.5 202.3 173.8 135.5 點 ^11 Pl2 Pb ^ Pl4 Pis 輝度（cd/m2) 122.5 138.8 165.8 171.5 149.2 為了方便區別各點間的輝度差異性，進一步使用以下計算 式計算各點與中央點（請參見圖5之P8)之比較值： 比較値 (該點之輝度値-中央點之輝度値) 中央點之輝度値7 201137414 Table 2 Point Pi ·TM~ One p3 P4 P5 Brightness (cd/m2) 155.9 130.7 138.8 133,8 130.8 · Point P6 Pg 1 P9 PlO Brightness (cd/m2) 125.8 _J70.5 202.3 173.8 135.5 Point^11 Pl2 Pb ^ Pl4 Pis Brightness (cd/m2) 122.5 138.8 165.8 171.5 149.2 To facilitate the distinction between luminance differences between points, further calculate the comparison between each point and the central point (see P8 in Figure 5) using the following formula:値 (the brightness of the point 値 - the brightness of the central point 値) The brightness of the central point 値
其中，比較值與0之差值越小表示該點·之輝度越接近中央點。 亦即該點與中央點之輝度差異較小。經計算後’表1及表2中 各點的比較值分別如表1-1及表2-1所示。 表1-1 點 Pi ,———-η 一 C3 P4 P5 *^0.40 -0.40 -0.43 輝度（cd/m2) -0.35 -0.40 P9 Pio 點 P6 Ρδ 一-- -0.21 -0.37 輝度（cd/m2) -0.42 >0.19 點 Pn Pn Pl3 Pl4 Pl5 一^.30 -0.28 -0.39 身度（cd/m2) -0.49 -0.40 表2-1 8 201137414Wherein, the smaller the difference between the comparison value and 0, the closer the luminance of the point is to the central point. That is, the difference between the brightness of the point and the central point is small. The calculated values of the points in Table 1 and Table 2 after calculation are shown in Table 1-1 and Table 2-1, respectively. Table 1-1 Point Pi, ———-η A C3 P4 P5 *^0.40 -0.40 -0.43 Brightness (cd/m2) -0.35 -0.40 P9 Pio Point P6 Ρδ One - 0.21 -0.37 Brightness (cd/m2 ) -0.42 >0.19 Point Pn Pn Pl3 Pl4 Pl5 One ^.30 -0.28 -0.39 Body (cd/m2) -0.49 -0.40 Table 2-1 8 201137414
表2-1當中各點之比較值與0之差值均小於表Μ當中各 點之比較值與G之差值，意即，表24 #巾各點射央點之輝 度差異較小。齡之，使財_之具絲散魏偏光板結構 之實驗組具魏_之輝度。本_之賊舰魏偏光板結 構具有光擴散之功效。The difference between the comparison value of each point in Table 2-1 and 0 is smaller than the difference between the comparison value of each point in the table and G, which means that the difference in the brightness of the point at each point of Table 24 is small. Age, the experimental group of the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The _ thief ship Wei polarizer structure has the effect of light diffusion.
雖然前述的插述及圖式已揭示本發明之較佳實施例，必須 瞭解到各種增添、許多修改和取代可能使用於本發明較佳實施 例’而不會脫離如所附申請專利範圍所界定的本發明原理之精 神及範圍。熟悉本發明所屬技術領域之—般技藝者將可體會， 本發明可使用於許多形式、結構、佈置、比例、材料、元件和 組件的修心因此，本文於此所揭示的實施例應被視為用以說 明本發明’而非用嫌制本發日月。本發明的範圍應由後附申請 專利範圍所界定，並涵蓋其合法均等物，並不限於先前的插述。 【圖式簡單說明】 圖1為習知技術示意圖； 圖2為本發明實施例示意圖； 圖3為本發明不同實施例示意圖； 圖4為本發明較佳實施例示意圖； 201137414 圖5為輝度量測取點示意圖； 圖6A為輝度實驗之對照組之實驗示意圖；以及 圖6B為輝度實驗之實驗組之實驗示意圖。 【主要元件符號說明】 10習知下偏光板 800液晶模組 100下偏光板 900上偏光板 200具光擴散功能偏光板結 構 P2點 30下感壓膠層 P3點 300光擴散感壓膠層 P4點 310感壓膠 P5點 330光擴散粒子 卩6點 400液晶層 P7點 401方向 p8點 409光線 P9點 50習知光學膜 PlO點 500光學膜 P11點 60光擴散層 Pl2點 70習知上感壓勝層 Pl3點 700上感壓膠層 P14點 80習知液晶模組 Pl5點While the foregoing is a preferred embodiment of the present invention, it is understood that various modifications, and various modifications and substitutions may be used in the preferred embodiments of the present invention without departing from the scope of the appended claims. The spirit and scope of the principles of the invention. It will be appreciated by those skilled in the art that the present invention may be practiced in many forms, structures, arrangements, ratios, materials, components, and components. Thus, the embodiments disclosed herein should be considered To illustrate the invention', rather than disguising the date of the present invention. The scope of the present invention should be defined by the scope of the appended claims and the legal equivalents thereof are not limited to the prior. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a prior art; FIG. 2 is a schematic view of a different embodiment of the present invention; FIG. 3 is a schematic view of a preferred embodiment of the present invention; FIG. 6A is a schematic diagram of an experiment of a control group of a luminance experiment; and FIG. 6B is an experimental diagram of an experimental group of a luminance experiment. [Main component symbol description] 10 conventional polarizing plate 800 liquid crystal module 100 polarizing plate 900 polarizing plate 200 with light diffusion function polarizing plate structure P2 point 30 under pressure adhesive layer P3 point 300 light diffusion pressure layer P4 Point 310 pressure sensitive adhesive P5 point 330 light diffusing particles 卩 6 points 400 liquid crystal layer P7 point 401 direction p8 point 409 light P9 point 50 conventional optical film PlO point 500 optical film P11 point 60 light diffusion layer Pl2 point 70 knowing the sense Pressure layer Pl3 point 700 on the pressure layer P14 point 80 conventional LCD module Pl5 point