201020315 六、發明說明： 【發明所屬之技術領域】 本發明係關於向列型液晶化合物、含其之光學補償膜及其製備 方法；特定而言，係關於可用以拓寬視角之向列型液晶化合物、 一種供一扭轉向列型（twisted nematic，ΤΝ)液晶顯示器（LCD) 用之含該向列型液晶化合物的光學補償膜，以及一種製備該光學 補償膜之方法。 【先前技術】 ® 於一液晶顯示器（LCD )中，係將液晶材料注入兩玻璃基材之 間’並由外部提供電壓以發揮液晶的電性及光學特性。此LCD因 使用由外部入射的光而與其它現有的顯示器區隔。再者，該LCD 具有厚度薄、重量輕及耗電量低之優點’且可用於許多應用包含 電視、個人電腦的螢幕、汽車的導航系統、數位相機及手機。 驅動液晶的模式包含使用向列型液晶之扭轉向列型（TN )、超 扭轉向列型（super twisted nematic，STN )、平面轉換型（in-plane ❹ switching ’ IPs)、垂直配向型（vertical alignment，VA)及光學 補償彎曲型（optically compensated bend，OCB)。由於联動模式 之液係一具有兩種折射率的等向材料，即常態（ordinary )折射 率及非常態（extraordinary)折射率，光徑及雙折射（birefringence) 會隨入射光的入射角而改變。因此，取決於面對螢幕的視線方向 而定’會發生對比（contrast ratio，CR )變化及灰階反轉。特別是， TN液晶顯示器有窄視角及窄對比的缺點，因為它們取決於光的行 進方向而在相差（And )方面會有大變化。為改善前述缺點，使用 一補償膜以補償該相差並因此增加視角。 201020315 曰本專利公開第2004-240012號揭露一種延遲板，其係由經堆 疊之三層所構成，其中該第一光學異向層在550奈米波長處實質 上具有7Γ之相差；該第二光學異向層在550奈米波長處實質上具 有7Γ/2之相差；以及該第三光學異向層具有負的光學異向性。於 該板中，在波長為450奈米、550奈米及650奈米時，所測得之延 遲/波長的比係介於0.2至0.3之間，且該第一層及該第二層中之 至少一者係由液晶分子所構成，該等液晶分子係經向列配位而固 定以使其可以5°至35。之傾斜角傾斜。然而，該三層之堆疊需要一 使用一黏著劑之層合製程。因此該製程變得複雜，且光學轴扭曲 很容易會造成品質下降及產量降低，進而使生產成本增加。再者， 由於異向性的特性會受許多條件（包含聚合物之分子重量、溫度 及伸展速率）影響，故難以控制各個層的異向性。 為克服前述缺點，日本專利公開第2005-208414號揭露一種反 向波長色散延遲膜（reverse wavelength dispersion retardation film)，其係藉由以下方式獲得：使一液晶單體停止不動，該液晶 單體之分子内具有於端基帶有一經結合之可聚合部分的盤形液晶 質（mesogen )及向列型液晶質，且同時維持一定向以使盤形液晶 質及向列型液晶質的光學軸係實質上定向為彼此平行；以及曰本 專利公開第2006-78670號揭露一種光學補償薄片，包含一在三個 方向具有不同折射率之光學異向層以及一透明支撐體，其中該光 學異向層係藉由聚合具有至少一可聚合基團之盤形液晶分子及具 有複數可聚合基團之化學品而形成的。然而，藉由聚合反應而製 得之光學補償薄片仍有源自盤形液晶所產生的顏色位移問題。 曰本專利公開第2004-240012號、第2006-78670號、第 201020315 2006-133652號以及第2006-201579號揭露光學補償薄片，其係藉 由限制延遲比（Re/Rth )而具有經改善的視角特性。然而，因為 該膜之平面方向的延遲值（Re)與該膜之厚度方向的延遲值（Rth) 間之差值增加’而使視角依存性（viewing angle dependency)提高。 【發明内容】 本發明之實施態樣係關於一具優異視角補償能力之光學補償膜 及其製備方法。 為達成本發明之目的，本發明提供含有化學品之向列型液晶化 © 合物，其中二或多個液晶質具有一預定之鍵結角度。 又，本發明提供含有如下化學式1所示之化學品的向列型液晶 化合物： [化學式1] [A]m-B-[A’]n 其中，m及n係獨立為丨至12之自然數； Α及Α’為一盤形或棒形液晶質且彼此相同或不同； φ A及A或A及A之連接係透過兩液晶質之直接鏈結或藉由一間隔 物而達成；以及 B為S l基’其係以幾何方式維持—預^之鍵結角度。 此外’本發明提供—種光學補償膜，包含一透明基材層卜配 向1，其係堆疊於該透明基材層上；以及-含有該等向列型液晶 化口物之塗覆層’其係堆疊於該配向層上且含有該等向列型液晶 化合物。 再者’本發明提供一種製備一光學補償膜之方法，其係藉由於 a材層上形配向層；藉由於該所形成之配向層上塗覆-含 201020315 有該等向列型液晶化合物之溶液；以及於50°C至150〇C下對該所 形成之層照射紫外線（UV)。 於下文中，將詳述本發明之較佳實施態樣。於其它情況下，並 未詳述已知的功能及結構，以免不必要地混淆本發明。 程度用語，例如於本文中所用之「約」、「實質上」等係代表 「為或幾乎為’當考慮到於所述環境下固有之製備公差 (tolerances)及材料公差時」，且當描述確切或絕對的圖式以幫 助瞭解本發明時，該等用語係用以避免肆無忌憚之侵權人不公平 的利用本發明揭露。 換言之，本發明提供含有如下化學式1所示之化學品的向列型 液晶化合物： Η匕學式1] [A]m-B-[A’]n 其中，m及n係獨立為丨至12之自然數； A及A’為-盤形或棒形液晶f且彼此相同或不同；以及 B為-官能基，錢以幾何方式維持—預定之鍵結角度。 ί λ式中A及A _立為盤形或棒形且可皆為棒形皆 或為盤形及棒形之混合。較佳地，A及A，係皆為盤形。 ^為一Μ基’其係以幾何方式維持-預定之鍵結角度。 持it官能基，其於該鍵結角度上沒有變化而無變形，並起 符遠4液晶質間之一預定 於-特定竇…丨士的鍵、、。角度之作用’從而改善-視角< 特疋實施例中’ Β係選自. 201020315201020315 VI. Description of the Invention: [Technical Field] The present invention relates to a nematic liquid crystal compound, an optical compensation film containing the same, and a method for preparing the same, and, in particular, to a nematic liquid crystal compound which can be used to broaden the viewing angle An optical compensation film containing the nematic liquid crystal compound for use in a twisted nematic liquid crystal display (LCD), and a method of preparing the optical compensation film. [Prior Art] ® In a liquid crystal display (LCD), a liquid crystal material is injected between two glass substrates and a voltage is supplied from the outside to exert electrical and optical characteristics of the liquid crystal. This LCD is distinguished from other existing displays by the use of light incident from the outside. Furthermore, the LCD has the advantages of thin thickness, light weight, and low power consumption, and can be used in many applications including televisions, personal computer screens, car navigation systems, digital cameras, and mobile phones. The mode for driving the liquid crystal includes a twisted nematic (TN), a super twisted nematic (STN), an in-plane ' switching 'IPs', and a vertical alignment type (vertical) using a nematic liquid crystal. Alignment, VA) and optically compensated bend (OCB). Since the liquid mode of the linkage mode is an isotropic material having two refractive indexes, that is, an ordinary refractive index and an extraordinary refractive index, the optical path and birefringence will follow the incident angle of the incident light. change. Therefore, depending on the direction of the line of sight facing the screen, a contrast ratio (CR) change and a gray scale inversion occur. In particular, TN liquid crystal displays have the disadvantages of narrow viewing angles and narrow contrast because they vary greatly in phase difference (And) depending on the direction in which light travels. To improve the aforementioned drawbacks, a compensation film is used to compensate for the phase difference and thus increase the viewing angle. A reticle is constructed by stacking three layers, wherein the first optically anisotropic layer has substantially a phase difference of 7 在 at a wavelength of 550 nm; the second is disclosed in Japanese Patent Publication No. 2004-240012. The optically anisotropic layer has substantially a phase difference of 7 Γ/2 at a wavelength of 550 nm; and the third optically anisotropic layer has a negative optical anisotropy. In the plate, at a wavelength of 450 nm, 550 nm, and 650 nm, the measured retardation/wavelength ratio is between 0.2 and 0.3, and the first layer and the second layer are At least one of them is composed of liquid crystal molecules which are fixed by nematic coordination so as to be 5 to 35 Å. The tilt angle is inclined. However, the stacking of the three layers requires a lamination process using an adhesive. Therefore, the process becomes complicated, and the distortion of the optical axis easily causes a decrease in quality and a decrease in yield, thereby increasing the production cost. Furthermore, since the anisotropic properties are affected by many conditions including the molecular weight, temperature and stretching rate of the polymer, it is difficult to control the anisotropy of the respective layers. In order to overcome the aforementioned drawbacks, a reverse wavelength dispersion retardation film is disclosed in Japanese Patent Laid-Open Publication No. 2005-208414, which is obtained by: stopping a liquid crystal cell, the liquid crystal cell a mesogen and a nematic liquid crystal having a polymerizable moiety bonded to a terminal group in the molecule, and maintaining a certain orientation to maintain the optical axis of the discotic liquid crystal and the nematic liquid crystal. Oriented to be parallel to each other; and an optical compensation sheet comprising an optically anisotropic layer having different refractive indices in three directions and a transparent support, wherein the optically anisotropic layer is disclosed in Japanese Patent Publication No. 2006-78670 It is formed by polymerizing a discotic liquid crystal molecule having at least one polymerizable group and a chemical having a plurality of polymerizable groups. However, the optical compensation sheet produced by the polymerization reaction still has a problem of color displacement caused by the discotic liquid crystal. An optical compensation sheet which has improved by limiting the retardation ratio (Re/Rth) is disclosed in Japanese Patent Publication No. 2004-240012, No. 2006-78670, No. 201020315, No. 2006-133652, and No. 2006-201579. Perspective characteristics. However, the viewing angle dependence is improved because the difference between the retardation value (Re) in the plane direction of the film and the retardation value (Rth) in the thickness direction of the film is increased by '. SUMMARY OF THE INVENTION Embodiments of the present invention relate to an optical compensation film having excellent viewing angle compensation capability and a method of fabricating the same. For the purposes of the present invention, the present invention provides a nematic liquid crystallized composition comprising a chemical wherein two or more liquid crystal materials have a predetermined bonding angle. Further, the present invention provides a nematic liquid crystal compound containing a chemical represented by the following Chemical Formula 1: [Chemical Formula 1] [A] mB-[A']n wherein m and n are independently a natural number of 丨 to 12; Α and Α' are a disc-shaped or rod-shaped liquid crystal and are identical or different from each other; φ A and A or A and A are connected through a direct link of two liquid crystals or by a spacer; and B is The S l base 'is maintained geometrically - the pre-bonding angle. Further, the present invention provides an optical compensation film comprising a transparent substrate layer, a alignment layer 1 stacked on the transparent substrate layer, and a coating layer containing the nematic liquid crystal material It is stacked on the alignment layer and contains the isotropic liquid crystal compound. Further, the present invention provides a method for preparing an optical compensation film by using an alignment layer on a layer; by coating the formed alignment layer - a solution containing the nematic liquid crystal compound of 201020315 And irradiating the formed layer with ultraviolet rays (UV) at 50 ° C to 150 ° C. Hereinafter, preferred embodiments of the present invention will be described in detail. In other instances, well-known functions and structures are not described in detail to avoid unnecessarily obscuring the invention. Level terms, such as "about" and "substantially" as used herein, mean "being or almost "when considering the manufacturing tolerances and material tolerances inherent in the environment", and when describing The exact or absolute schema is used to assist in the understanding of the present invention and is used to avoid unfair infringement of the present invention. In other words, the present invention provides a nematic liquid crystal compound containing a chemical represented by the following Chemical Formula 1: Η匕学1] [A]mB-[A']n wherein m and n are independently from 丨 to 12 A; A and A' are - disc or rod-shaped liquid crystals f and are the same or different from each other; and B is a - functional group, and the money is geometrically maintained - a predetermined bonding angle. In the λ formula, A and A _ are disc-shaped or rod-shaped and may be rod-shaped or a mixture of disc and rod. Preferably, both A and A are disc shaped. ^ is a Μ base' which is geometrically maintained - a predetermined bonding angle. It has an it functional group which has no change at the bonding angle and is not deformed, and is one of the four liquid crystal materials which is predetermined to be a specific sinus... gentleman's bond. The role of the angle 'and thus the improvement - the angle of view < the embodiment ’ is selected from. 201020315
A’及A’或A及A之連接係透過兩液晶質之直接鏈結或藉由一間 隔物而達成’且兩液晶質較佳係線性鏈結的。該兩液晶質之線性 鏈結係揭露於 Chem. Rev. 1999, Vol. 99, 1863、J. AM. CHEM. SOC, 2003, Vol. 125, 11062、J. Am. Chem. Soc. 1985, Vol. 107, 4192、J.The connection between A' and A' or A and A is achieved by direct bonding of two liquid crystals or by a spacer and the two liquid crystals are preferably linearly linked. The linear linkage of the two liquid crystals is disclosed in Chem. Rev. 1999, Vol. 99, 1863, J. AM. CHEM. SOC, 2003, Vol. 125, 11062, J. Am. Chem. Soc. 1985, Vol. . 107, 4192, J.
Org· Chem· 2005, Vol. 70, 2745、Science, 2001，Vol. 293, 79、J. Am. Chem. Soc. 2006，Vol. 128，7670、Accounts of Chemical Research， 2004, Vol. 37, 735、Eur. J. Org· Chem. 2006, 3087 中。 又，本發明之液晶化合物包含m=l、n=l且A及A’皆為如下化 學式2所示之化學品的一者，但並非限於此。 [化學式2]Org Chem. 2005, Vol. 70, 2745, Science, 2001, Vol. 293, 79, J. Am. Chem. Soc. 2006, Vol. 128, 7670, Accounts of Chemical Research, 2004, Vol. 37, 735 , Eur. J. Org. Chem. 2006, 3087. Further, the liquid crystal compound of the present invention contains m = 1, n = 1, and both A and A' are one of the chemicals shown in the following Chemical Formula 2, but are not limited thereto. [Chemical Formula 2]
R1〇2 r2o2ch2 其中’ R1至R4係獨立為(C丨-Cm)烷基、（C丨-Ci4)烷氧基、（CrCw) 烷基羰基、（C6-C20)芳基、（C6-C2G)芳基羰基、（CVCm)烷氧基羰基、 (C6-C2〇)芳氧基幾基、胺甲酿基（carbamoyl )、或胺績醯基 (sulfamoyl) ; R1至R4之該烷基、該烷基羰基的烷基與該烷氧基 及該烷氧基羰基的烷氧基，可為直鏈或支鏈且含飽和或不飽和 鍵；以及 R1至R4之該烧基、芳基、炫;醯基（alkanoyl )、締醯基（alkenoyl)、 201020315 炔醯基（alkynoyl)、芳醯基（aryloyl)、烷氧基羰基、芳氧基羰 基、胺甲醯基、及胺磺醯基，係可進一步經一或多個選自以下群 組之取代基所取代：_素、氰基及羥基。 於該式中’R至R係獨立為（CVC14)烷基、（c6_C2〇)芳基、（Ci_c… 院酿基、（c3-c2〇)稀酿基、（c3-c2〇)炔酿基、（c”C2〇)芳酿基、（Ci_d 炫氧基幾基、（C6-C2〇)芳氧基羰基、胺甲酿基、或胺磺醯基；以及 R至R之該烧基、^基、烧醯基、稀醢基、快醯基、芳醯基、炫 氧基羰基、芳氧基羰基、胺甲醯基、及胺磺醯基，係可進一步經 一或多個選自以下群組之取代基所取代：自素、氰基及經基。 本發明提供一種含有該等向列型液晶化合物之光學補償膜，且 本發明之該光學補償膜可透過以下製程而提供。 本發明提供一種製備一光學補償膜之方法，其係藉由於一基材 膜上形成一配向層；藉由於該所形成之配向層上塗覆一含有該等 向列型液晶化合物之溶液而形成一層；以及於50〇c至150c>c下對 該所形成之層照射紫外線（UV)。 藉由上述方法所製得之本發明光學補償臈包含一透明基材層； 一堆疊於該透明基材層上之配向層；以及一堆疊於該配向層上之 塗覆層’其含有該等含有如化學式1所示之化學品的向列型液晶 化合物。 為製備本發明之光學補償膜’可實施一藉由於該基材上塗覆一 配向溶液並隨後乾燥該配向溶液而形成該配向層的製程。 該基材層係透明的，且透明係意謂著透光率為8〇%或以上。本 發明之基材層可選自以下群組：玻璃、以烯烴為基質之樹脂、以 環烯烴為基質之樹脂、以酯為基質之樹脂、聚碳酸酯、聚丙烯酸 201020315 * 酯及聚砜、及其混合物與共聚物；以及該基材層之例子包含纖維 素酯、聚碳酸酯、聚砜、聚醚砜、聚丙烯酸酯、聚曱基丙烯酸酯、 及降莰烯（norbornene )樹脂。特定而言，可使用膜形式之纖維素 三醋酸酯（cellulose triacetate)或聚對苯二甲酸乙二醋。 該基材層之厚度較佳為20微米至500微米，且更佳為40微米 至200微米。再者，該基材層可為藉由伸展而製得之光學異向膜， 且當該基材層為一纖維素酯膜時，可添加延遲增進劑。此外，可 對該基材層進行輝光放電（glow discharge)、電暈放電（corona 〇 discharge)、UV處理、火焰處理、鹼處理、酸處理、或賦予一黏 著層。 可實施一於該基材層上形成該配向層之製程，且本發明之配向 層可由一選自以下群組之樹脂所製成：聚醯亞胺、以聚苯乙烯為 基質之聚合物、明膠（gelatin )及以聚乙稀醇為基質之聚合物、及 其混合物與共聚物，且更佳係含有以聚乙烯醇為基質之聚合物。 該配向層係藉由於該基材層上塗覆該聚合物溶液、乾燥且隨後 使其暴露於磁場或光線下或磨擦其表面而製得。該溶液中之樹脂 ❿ 濃度為0.1重量％至10重量％，且該溶液可含有一添加劑以幫助 該層中之表面官能基的配向。 該等溶液可藉由各種塗覆方法而塗覆於該基材上，例如輥塗 覆、柔版塗覆、剛模塗覆（die coating)、滚筒塗覆及半圓形滾筒 塗覆（meniscus roll coating );並於 40°C 至 200°C 下乾燥，較佳 係於50°C至100°C下乾燥；且隨後經磨擦，進而提供本發明之配 向層。 之後，可實施一藉由塗覆一含有該等含如下化學式1所示之化 201020315 . 學品之向列型液晶化合物的溶液，以於該配向層上形成該層之製 程，其中二或多個液晶質具有一預定之鍵結角度。 [化學式1] [A]m-B-[A，]n 其中，m及η係獨立為1至12之自然數； Α及Α’為一盤形或棒形液晶質且彼此相同或不同；以及 B為一官能基，其係以幾何方式維持一預定之鍵結角度。 A’及A’或A及A之連接係透過兩液晶質之直接鏈結或藉由一間 隔物而達成，且兩液晶質較佳係線性鏈結的。 © 於含有該等化學品之向列型液晶化合物中（其中二或多個液晶 質具有一預定之鍵結角度），該等液晶質係皆為盤形、皆為棒形 或為盤形及棒形之混合，較佳係含有盤形之形式，更佳係皆為盤 形。藉由添加該等向列型液晶化合物（其中二或多個選自前述形 式之液晶質係經連接的），可獲得一具經改善之視角及顏色位移 的光學補償膜。具有二或多個經連接之液晶質以維持一預定之鍵 結角度的該等液晶之配向，係藉由一光照射而穩定地停止不動 的，以於該膜中產生光學異向性。 含有該等化學品（其中二或多個液晶質具有一預定之鍵結角度） 之向列型液晶化合物之例子含有如下化學式3所示之化學品’但 並非限於此。 [化學式3]R1〇2 r2o2ch2 wherein 'R1 to R4 are independently (C丨-Cm)alkyl, (C丨-Ci4)alkoxy, (CrCw)alkylcarbonyl, (C6-C20)aryl, (C6-C2G An arylcarbonyl group, a (CVCm) alkoxycarbonyl group, a (C6-C2〇)aryloxy group, an carbamoyl group, or a sulfamoyl group; the alkyl group of R1 to R4, The alkyl group of the alkylcarbonyl group and the alkoxy group of the alkoxy group and the alkoxycarbonyl group may be linear or branched and contain a saturated or unsaturated bond; and the alkyl group, aryl group of R1 to R4, Hyun; alkanoyl, alkenoyl, 201020315 alkynyl, aryloyl, alkoxycarbonyl, aryloxycarbonyl, aminemethanyl, and amidoxime The substituent may be further substituted with one or more substituents selected from the group consisting of _, cyano and hydroxy. In the formula, 'R to R is independently (CVC14) alkyl, (c6_C2〇) aryl, (Ci_c... broth, (c3-c2〇) dilute, (c3-c2〇) alkyne , (c"C2〇) an aromatic base, (Ci_d methoxyl group, (C6-C2 fluorene) aryloxycarbonyl group, an amine methyl group, or an amine sulfonyl group; and the alkyl group of R to R, a base, a sulfhydryl group, a sulfhydryl group, a fluorenyl group, an aryl fluorenyl group, a methoxycarbonyl group, an aryloxycarbonyl group, an amine carbaryl group, and an amine sulfonyl group, which may be further selected from one or more Substituents of the following groups are substituted: arginyl, cyano and thiol. The present invention provides an optical compensation film containing the nematic liquid crystal compound, and the optical compensation film of the present invention can be provided by the following process. The invention provides a method for preparing an optical compensation film by forming an alignment layer on a substrate film, and forming a layer by coating a solution containing the nematic liquid crystal compound on the formed alignment layer. And irradiating the formed layer with ultraviolet rays (UV) at 50 ° C to 150 c > c. The optical complement of the present invention obtained by the above method The crucible comprises a transparent substrate layer; an alignment layer stacked on the transparent substrate layer; and a coating layer stacked on the alignment layer, which contains the nemesis containing the chemical as shown in Chemical Formula 1 Liquid crystal compound. For preparing the optical compensation film of the present invention, a process for forming the alignment layer by coating an alignment solution on the substrate and then drying the alignment solution may be performed. The substrate layer is transparent and transparent. It means that the light transmittance is 8〇% or more. The substrate layer of the present invention may be selected from the group consisting of glass, an olefin-based resin, a cyclic olefin-based resin, and an ester-based resin. , polycarbonate, polyacrylic acid 201020315 * esters and polysulfones, and mixtures and copolymers thereof; and examples of the substrate layer comprising cellulose esters, polycarbonates, polysulfones, polyethersulfones, polyacrylates, polyfluorenes a acrylate, and a norbornene resin. Specifically, a cellulose triacetate or a polyethylene terephthalate in the form of a film may be used. The thickness of the substrate layer is preferably 20 microns to 500 μm, and more preferably 40 μm to 200 μm. Further, the substrate layer may be an optically anisotropic film obtained by stretching, and may be added when the substrate layer is a cellulose ester film. Further, the substrate layer may be subjected to glow discharge, corona discharge (discharge), UV treatment, flame treatment, alkali treatment, acid treatment, or an adhesive layer. The process of forming the alignment layer on the substrate layer, and the alignment layer of the present invention can be made of a resin selected from the group consisting of polyimine, polystyrene-based polymer, gelatin (gelatin) And a polymer based on polyethylene glycol, and mixtures and copolymers thereof, and more preferably a polymer based on polyvinyl alcohol. The alignment layer is prepared by coating the polymer layer on the substrate layer, drying it and then exposing it to a magnetic field or light or rubbing its surface. The resin has a cerium concentration of from 0.1% by weight to 10% by weight in the solution, and the solution may contain an additive to assist in the alignment of surface functional groups in the layer. The solutions can be applied to the substrate by various coating methods such as roll coating, flexographic coating, die coating, roller coating and semi-circular roller coating (meniscus). Roll coating); and drying at 40 ° C to 200 ° C, preferably at 50 ° C to 100 ° C; and then rubbing to provide the alignment layer of the present invention. Thereafter, a process of forming the layer on the alignment layer by coating a solution containing the nematic liquid crystal compound containing the chemical composition of the following formula 1 in the following formula 1 may be carried out, wherein two or more The liquid crystals have a predetermined bonding angle. [A]mB-[A,]n wherein m and η are independently a natural number from 1 to 12; Α and Α' are a disc-shaped or rod-shaped liquid crystal and are identical or different from each other; It is a functional group that maintains a predetermined bonding angle geometrically. The connection between A' and A' or A and A is achieved by direct bonding of two liquid crystals or by a spacer, and the two liquid crystals are preferably linearly linked. © in a nematic liquid crystal compound containing such chemicals (wherein two or more liquid crystal materials have a predetermined bonding angle), the liquid crystal systems are all disc-shaped, all rod-shaped or disc-shaped and The stick-shaped mixture preferably has a disc shape, and more preferably has a disc shape. An optical compensation film having an improved viewing angle and color shift can be obtained by adding the nematic liquid crystal compounds in which two or more liquid crystal systems selected from the foregoing are attached. The alignment of the liquid crystals having two or more connected liquid crystals to maintain a predetermined bonding angle is stably stopped by a light irradiation to cause optical anisotropy in the film. An example of the nematic liquid crystal compound containing these chemicals (in which two or more liquid crystal matters have a predetermined bonding angle) contains the chemical substance shown in the following Chemical Formula 3', but is not limited thereto. [Chemical Formula 3]
10 201020315 其中，R1至r8係獨立為（q-C丨4)炫基、（Cl_Cl4)烧氧基、（Ci_Cl4) 烷基羰基、（C6-C2Q)芳基、（C6-C2G)芳基羰基、（Cl_C|4)烧氧基羰基、 (Ce-Cao)芳氧基羰基、胺曱醯基、或胺磺醯基； R1至R8之該烷基及該烷基羰基的烷基與該烷氧基及該烷氧基羰基 的烷氧基，可為直鏈或支鏈且含飽和或不飽和鍵；以及 R1至R8之該烷基、芳基、烷酿基、烯醯基、炔醯基、芳醯基、烷 氧基羰基、芳氧基羰基、胺甲醯基、及胺磺醯基’係可進一步經 一或多個選自以下群組之取代基所取代：齒素、氰基及羥基。 © 特定而言，於該式中，R丨至R8為（Ci_Ci4)院基、（C6-C20)芳基、 (〇1-€：|4)烧酿基、（匸3-(：20)稀醢基、（匸3-匸20)炔醯基、（匸7-匸20)芳酿基、 (c, -C 烷氧基羰基、（C6_C2())芳氧基羰基、胺曱醯基、或胺磺酿基； 以及 R1至R8之該烷基、芳基、烷醯基、烯醯基、炔醯基、芳醯基、烷 氧基羰基、芳氧基羰基、胺曱醯基、及胺磺醯基，係可進一步經 一或多個選自以下群組之取代基所取代：鹵素、氰基及羥基。 φ 該等液晶之合成係揭露於J. Am· Chem. Soe.，1985, Vol· 107, 4192、Tetrahedron Lett” Vol. 23, 1913, 1982、J. 〇rg. Chem. 2000, Vol. 65，1650 及 j. Am. Chem. Soc” 2005, Vol. 127, 534 中。 於含有該等含有化學品（其中二或多個液晶質具有一預定之鍵 結角度）之向列型液晶化合物的溶液中，該整個溶液中之液晶化 合物為1重量％至30重量％。當該等液晶化合物之含量係少於1 重量％時’則無法期望該光學補償膜之改善或該膜之顏色位移。反 之’當該等液晶化合物之含量係超過30重量％時’因為對應於該 超過含量之影響並不顯著而造成材料的浪費。 11 201020315 該塗層之厚度較佳為0.5微米至10微米。一用以塗覆本發明之 液晶化合物於該配向層上之方法的例子，包含輥塗覆、柔版塗覆、 剛模塗覆、滾筒塗覆及半圓形滾筒塗覆，但並非限於此。 之後，可實施一於50°C至150°C下對該所形成之膜（其含有該 等液晶化合物）照射UV的製程，進而可製備本發明之光學補償 膜。 根據本發明之光學補償膜，其可藉由使用含有二或多個液晶質 之液晶化合物而獲得優異的視角補償效果並減少顏色位移。 【實施方式】 © 於下文中，茲以以下實施態樣之敘述及參照所附圖式而顯現本 發明之優點、特徵及觀點。 製備實施例1 自經庚氧基羰基曱基取代之卟琳（porphyrin)透過Ag(I)-促進 偶聯法（Ag(I)-promoted coupling method，請參 J_ Am. Chem. Soc·， 1985, Vol. 107, 4192)、使用 1.3 伸苯基（phenylene)間隔物而獲 得以下液晶化合物：10 201020315 wherein R1 to r8 are independently (qC丨4) leukoxyl, (Cl_Cl4) alkoxy, (Ci_Cl4) alkylcarbonyl, (C6-C2Q) aryl, (C6-C2G) arylcarbonyl, ( Cl_C|4) an alkoxycarbonyl group, a (Ce-Cao) aryloxycarbonyl group, an amine fluorenyl group, or an amine sulfonyl group; the alkyl group of R1 to R8 and an alkyl group of the alkylcarbonyl group and the alkoxy group And an alkoxy group of the alkoxycarbonyl group which may be linear or branched and containing a saturated or unsaturated bond; and the alkyl group, aryl group, alkylene group, olefin group, alkynyl group of R1 to R8, The aryl fluorenyl group, the alkoxycarbonyl group, the aryloxycarbonyl group, the amine carbaryl group, and the amine sulfonyl group can be further substituted with one or more substituents selected from the group consisting of dentate, cyano and Hydroxyl. © In particular, in this formula, R丨 to R8 are (Ci_Ci4), (C6-C20) aryl, (〇1-€:|4), (匸3-(:20) Dilute fluorenyl, (匸3-匸20)alkynyl, (匸7-匸20) aryl, (c, -C alkoxycarbonyl, (C6_C2()) aryloxycarbonyl, amine fluorenyl Or a sulfonamide group; and the alkyl group, aryl group, alkyl fluorenyl group, olefin group, alkynyl group, aryl fluorenyl group, alkoxycarbonyl group, aryloxycarbonyl group, amine fluorenyl group of R1 to R8, And the amine sulfonyl group may be further substituted by one or more substituents selected from the group consisting of halogen, cyano and hydroxy. φ The synthesis of these liquid crystals is disclosed in J. Am. Chem. Soe., 1985, Vol. 107, 4192, Tetrahedron Lett" Vol. 23, 1913, 1982, J. 〇rg. Chem. 2000, Vol. 65, 1650 and j. Am. Chem. Soc" 2005, Vol. 127, 534 The liquid crystal compound in the entire solution is from 1% by weight to 30% by weight in a solution containing the nematic liquid crystal compound containing the chemical (in which two or more liquid crystal materials have a predetermined bonding angle). When the content of the liquid crystal compounds is less than 1 weight At the time of %, the improvement of the optical compensation film or the color shift of the film cannot be expected. Conversely, when the content of the liquid crystal compounds exceeds 30% by weight, the material is caused by the influence of the excess content being insignificant. 11 201020315 The thickness of the coating is preferably from 0.5 μm to 10 μm. An example of a method for coating the liquid crystal compound of the present invention on the alignment layer comprises roll coating, flexographic coating, and rigid molding. Coating, roller coating, and semi-circular roller coating, but not limited thereto. Thereafter, the formed film (which contains the liquid crystal compound) may be irradiated with UV at 50 ° C to 150 ° C. The optical compensation film of the present invention can be prepared by the process, and the optical compensation film according to the present invention can obtain an excellent viewing angle compensation effect and reduce color displacement by using a liquid crystal compound containing two or more liquid crystal materials. The advantages, features, and viewpoints of the present invention are expressed by the following description of the embodiments and the accompanying drawings. Preparation Example 1 Substituted by heptyloxycarbonyl fluorenyl Porphyrin is passed through the Ag(I)-promoted coupling method (see J_Am. Chem. Soc., 1985, Vol. 107, 4192). (phenylene) spacer to obtain the following liquid crystal compound:
實施例1 於一厚度為60微米之纖維素三醋酸酯膜上’塗覆經烷基取代之 聚乙烯醇（PVA ; R 1130, Kuraray Co·, Ltd)至厚度為500奈米。 為製得一 PVA塗覆溶液，將1.5克R1130、75克去離子水、24克 12 201020315 甲醇、0.15克之50°/。的戊二醛含水溶液以及1丨克之〇 5莫耳濃度 的硫酸混合’以製備一 PVA含水溶液。使用#16 Mayer輥塗覆該 PVA含水溶液；於60。(：下乾燥90秒；冷卻2分鐘；且隨後於80oC 下再次乾燥150秒’進而於該纖維素三醋酸酯膜上製備一配向層。 以一磨光機器（Meere Company Inc.)磨擦該所製得之配向層（PVA ) 的表面。於該經磨擦之配向層上，使用#1〇 Mayer輥塗覆一塗覆溶 液（其含有10%之製備實施例1的液晶化合物）至厚度為2微米。 藉由溶解2克之製備實施例1的液晶化合物、〇.〇1克光起始劑 © (IRGACURE 184，CibaInc.)及18克甲基乙基酮而獲得該液晶溶 液，並使其於130°C下以一 UV固化機器（APO Co.，Ltd.)固化 150 秒。 改變波長為589奈米之光的入射角並以一雙折射分析儀（由Oji Scientific Instrument所製造之KOBRA-WPR)來測量該所製得之 膜的相差。其結果係如第1圖所示。 第1圖所示為根據本發明之一較佳實施態樣的光學補償膜内之 ©相差的圖。由第1圖可看出，本發明之光學補償膜可根據一入射 角之相差變化圖樣及相差值而具有視角補償效果。 根據本發明，可於工業上提供一可獲得優異視角補償效果並減 少顏色位移之光學補償薄片。 儘管已以特定實施態樣來描敘本發明，應瞭解熟悉本領域技術 者可進行許多改變及修改而不背離本發明之精神及範圍’如後附 申請專利範圍所界定。 13 201020315 【圖式簡單說明】 第1圖所示為根據本發明之一較佳實施態樣的光學補償膜内之 相差結果的圖。 【主要元件符號說明】 (無）Example 1 An alkyl-substituted polyvinyl alcohol (PVA; R 1130, Kuraray Co., Ltd.) was coated onto a cellulose triacetate film having a thickness of 60 μm to a thickness of 500 nm. To prepare a PVA coating solution, 1.5 grams of R1130, 75 grams of deionized water, 24 grams of 12 201020315 methanol, and 0.15 grams of 50°/. An aqueous solution of glutaraldehyde and 1 gram of ruthenium 5 molar concentration of sulfuric acid were mixed to prepare a PVA aqueous solution. The PVA aqueous solution was coated using a #16 Mayer roll; (: drying for 90 seconds; cooling for 2 minutes; and then drying again at 80 ° C for 150 seconds' to prepare an alignment layer on the cellulose triacetate film. Rubbing the chamber with a polishing machine (Meere Company Inc.) a surface of the prepared alignment layer (PVA). On the rubbed alignment layer, a coating solution (containing 10% of the liquid crystal compound of Preparation Example 1) was applied to a thickness of 2 using a #1〇Mayer roll. The liquid crystal solution was obtained by dissolving 2 g of the liquid crystal compound of Preparation Example 1, 〇.1 g of photoinitiator © (IRGACURE 184, Ciba Inc.) and 18 g of methyl ethyl ketone, and allowed to Curing at 130 ° C for 150 seconds with a UV curing machine (APO Co., Ltd.) Changing the incident angle of light with a wavelength of 589 nm and using a birefringence analyzer (KOBRA-WPR manufactured by Oji Scientific Instrument) The phase difference of the film thus obtained is measured. The result is shown in Fig. 1. Fig. 1 is a view showing the phase difference in the optical compensation film according to a preferred embodiment of the present invention. As can be seen from Fig. 1, the optical compensation film of the present invention can be changed according to a phase difference of an incident angle. According to the present invention, an optical compensation sheet which can obtain an excellent viewing angle compensation effect and reduce color displacement can be industrially provided. Although the present invention has been described in terms of specific embodiments, it should be understood A person skilled in the art can make many changes and modifications without departing from the spirit and scope of the invention as defined in the appended claims. 13 201020315 [Simple description of the drawings] Figure 1 shows a comparison according to the present invention. A diagram of the phase difference results in an optical compensation film of a good implementation. [Main component symbol description] (none)
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