1282358 九、發明說明： 液晶及其形成方法，特別是有關於 【發明所屬之技術領域】 本發明係有關於膽固醇 以光干涉形成之膽固醇液晶 【先前技術】 一般的固體會因升溫至融點而變化成透明的液體。但是， 某，具有特殊構造的—群物f，不由固體直接轉移成液體，而 、、-液口的中間狀恶。這種材料係於1年由奥地利植物學家1282358 IX. Description of the invention: Liquid crystal and its formation method, in particular, the technical field of the invention belongs to the invention. The present invention relates to a cholesterol liquid crystal formed by light interference of cholesterol. [Prior Art] A general solid will rise to a melting point. Change into a transparent liquid. However, some group f with a special structure is not directly transferred into a liquid by solids, but is in the middle of the liquid mouth. This material was made in 1 year by an Austrian botanist
Reinitzer首紐現，他觀察到膽固醇的乙酸醋化合 遺著温度的上升會纟145。。時之固態，逐漸轉變成半溶融 / =的液恶，直到179 c才轉變成清澈的液態。其後德國的 物理學家0· Lehmann於1889年將這種類似晶體的液體^義為 =¾的第四態稱為「〉夜晶」，而此種液晶物質在某一特定的溫度 ，圍内，會具有液體及固體的特性。大多數具有液晶性的物質， 是具有細長棒形或扁平狀分子構造的有機化合物，目前已知的 液晶物質約有一萬種左右。 t 1922年由G· FHedel利用偏光顯微鏡觀察液晶的結果，以 凝集構造的不同將液晶大致分為三類一向列型（Nematic)、層 列型（Smectic)及膽固醇型（Cholesteric)。以下就膽固醇型液 晶的結構、介電性與光學特性等作一說明： 膽固醇液晶（Cholesteric Liquid Crystal)並不是一般聽到 生化西學上的膽固醇，而是一種結構相似於膽固醇分子的液 晶。膽固醇液晶主要是由多層的向列型液晶堆積而形成，在結 構上具有如同層列性液晶般的層狀構造，在「多層向列型液晶」 中加入「旋光分子」（chiral agent)，會使膽固醇液晶的各層分 子的長軸方向與鄰接層分子軸方向有些微小的偏向，所以^全 體來看其液晶分子軸的排列呈螺旋平面狀的排列，這種結構跟 1282358 ==分子相似，因此稱此類液晶為「義醇液晶」。當分子轴 向Λ了一36,0度（即第一層分子轴方向與最後一層的分子軸同 晶料旋光性，選擇性光折射，圓偏光二」色(GU P“貝’即疋基於此特殊的螺旋。膽固醇型液晶螺距的長度合 =度的不同而改變，因此會產生不同波長的選擇性;；： 而產生不同的顏色變化’故也可應用於溫度感測器。 由於液晶分子皆由板狀或是棒狀分子所形成，因此在分子 J”：行或垂直方向上的物理特性有一些的差異，所以也將 2 /刀子稱做是異方性（AnisGtn)pie)晶體。對膽固醇型液晶 有兩個折射率’分別為垂直液晶長軸方向（n。）及平行 個：二由方向（ne)兩種，所以當光入射液晶日夺，便會受到兩 所㈣響’造成在垂直液晶與平行液晶方向上光速會有 磁^處=液晶分子的結構為各向異方性，所以所引起的電 電：ί:ΐ:ΐί向異方性’簡單的說也就是液晶分子具有介 方性的特質，因而可以利用這些性質來改 文入射光的強度進一步應用於顯示器元件上。 =道非偏極光射入膽固醇液晶中’這道光會被分成兩個 =的0偏極光（左旋圓偏極及右旋圓偏極），依照物 一道圓偏極光將會穿透，另一道則會反射。若，膽固 光在可反射可見光的範圍内’我們便可觀察到反射 ^者’膽固醇液晶具有選擇性反射的特性。當有一圓偏極 、契其螺旋方向具相同方向時’其將選擇性的被反射，最 大的反射光的波長則必須滿足下列式子：Reinitzer's first son is now, he observed that the temperature of the acetate acetate complex will rise 145. . At the time of the solid state, it gradually turns into a semi-melting / = liquid evil, until 179 c turns into a clear liquid. Later, German physicist 0. Lehmann called the fourth state of the crystal-like liquid ==3⁄4 in 1889, and the liquid crystal substance was at a certain temperature. Inside, it will have the characteristics of liquid and solid. Most liquid crystal substances are organic compounds having an elongated rod-shaped or flat molecular structure, and there are about 10,000 kinds of liquid crystal materials known at present. In 1922, the liquid crystal was observed by G·FHedel using a polarizing microscope. The liquid crystals were roughly classified into three types of Nematic, Smectic, and Cholesteric depending on the agglutination structure. The following is a description of the structure, dielectric properties, and optical properties of cholesterol-type liquid crystals: Cholesteric Liquid Crystal does not generally hear biochemical Western cholesterol, but a liquid crystal that is structurally similar to cholesterol molecules. The cholesteric liquid crystal is mainly formed by stacking a plurality of layers of nematic liquid crystal, and has a layered structure like a smectic liquid crystal in structure, and a "chiral agent" is added to the "multilayer nematic liquid crystal". The major axis direction of each layer of molecules of the cholesteric liquid crystal is slightly deflected from the molecular axis direction of the adjacent layer. Therefore, the arrangement of the liquid crystal molecular axes is spirally planar, and the structure is similar to the 1282358 == molecule. This type of liquid crystal is called "alcohol liquid crystal". When the molecular axis is smashed by 36,0 degrees (that is, the molecular direction of the first layer and the molecular axis of the last layer are the same as the optical rotation of the crystal, selective light refraction, and circular polarization) (GU P "bee" is based on This special spiral. The length of the cholesteric liquid crystal pitch varies with the degree = the difference, so it will produce different wavelengths of selectivity;;: and produce different color changes', so it can also be applied to temperature sensors. They are all formed by plate-like or rod-shaped molecules, so there are some differences in the physical properties of the molecule J": in the row or in the vertical direction, so the 2/knife is also referred to as an anisotropic (AnisGtn) pie) crystal. For cholesteric liquid crystals, there are two refractive indices 'the vertical liquid crystal long axis direction (n.) and the parallel one: two by the direction (ne), so when the light enters the liquid crystal, it will be affected by two (four) rings. The speed of light in the direction of vertical liquid crystal and parallel liquid crystal will be magnetic = the structure of liquid crystal molecules is anisotropic, so the electric electricity caused by: ί: ΐ: ΐί to the anisotropy 'simplely, that is, liquid crystal molecules Has the characteristics of intermediaries, and thus In order to use these properties to modify the intensity of incident light, it is further applied to display elements. = Non-polarizing light is injected into the cholesteric liquid crystal. 'This light will be divided into two = 0 polarized light (left-handed circular and right-handed circular) Polarity), according to the object, a polar apolar light will penetrate, and the other will reflect. If the gallbladder light is in the range of visible light, we can observe that the reflection liquid crystal has selective reflection. Characteristics: When there is a circular pole and its spiral direction has the same direction, it will be selectively reflected, and the wavelength of the largest reflected light must satisfy the following formula:
ave * P λ = η Λ 表示散射光的波長，nave為平均折射率（nc+ne) /2，Ave * P λ = η Λ denotes the wavelength of the scattered light, and nave is the average refractive index (nc+ne) /2,
P 1282358 指的是螺距。 介電===時’液晶分子會因平行及垂直於電場方向之 ς =數差大於或小^ G，決定液晶分子的轉向是平行或垂直 器需::::上=液;==穿透式：透式液晶顯示 :膽固_二晶二 光:難 液晶顯示器也有峨= 模組。田μ» ⑦r旦面也十分清晰，不需再加背光 、、 ，、柯降低液晶顯示器3G%以上的製造成本。 電、液晶顯示器是—種具有高亮度、高對比、省 可以做m s視角、不閃爍等優點的新型顯示器，且產品P 1282358 refers to the pitch. When dielectric === 'liquid crystal molecules will be parallel and perpendicular to the direction of the electric field ς = number difference is greater than or small ^ G, determine that the liquid crystal molecules turn parallel or vertical need: ::: upper = liquid; = = wear Transparency: Transmissive liquid crystal display: biliary _ two crystal two light: difficult LCD display also has 峨 = module. Tian μ» 7r surface is also very clear, no need to add backlight,,,, Ke to reduce the manufacturing cost of LCD monitors more than 3G%. Electric and liquid crystal displays are new types of displays with high brightness, high contrast, saving m s viewing angle, no flicker, etc.
Atli (hand heid~c—) 需要長時對顯示f像的更新頻率要求不高，同時又 大的優點就、曰省用的狀恶下。反射式膽固醇液晶顯示器最 1/50或者更二平均用電量只需要穿透式液晶面板的 (改變顯示的影像夜晶做成的電子書只有在翻頁 同時膽固醇液晶且有二，晝面靜止時不必用到電力。 拔掉插頭或電池:也能；匕見;匕_所需，W :;寺：等電子用品（如筆記型電腦、-等：：、:】;，;卜)電 身又而口，膽固酵液晶的反射頻譜之波長介於峰之 1282358 間而&範圍-般僅有數十奈米（nm)的寬度，要達到全彩的 效果’其反射頻譜必須包含全部的可見光的頻譜範圍，也 4〇〇細到7〇〇nm的範圍。而解決反射頻譜不夠寬的方法即是使 曰本身具有非單一的螺距，如此，膽固醇液晶的反射 2的螺距二如第一圖所示，使膽固醇液晶的反射頻= ^見的頻翻圍，甚至達到整個可見光範圍，而使膽固醇液 曰日顯示器可達全彩的效果。 在美國專利編號5,948,831，如第二圖所示，發明人仏⑽ 利用液晶單體（liquid crystalm〇n〇mer)與旋光性單體（A㈣Atli (hand heid~c-) needs a long time to update the frequency of the display f image is not high, and at the same time, the advantages are great, and the use of the use of the situation. Reflective Cholesterol Liquid Crystal Display's 1/50 or 2nd average power consumption only requires a transmissive LCD panel. (The e-book made by changing the displayed image night crystal is only at the same time as turning the page while the cholesterol liquid crystal has two, the face is still It is not necessary to use electricity. Unplug the plug or battery: can also see; see 匕 _ required, W:; Temple: and other electronic supplies (such as notebook computers, -etc.::,:);,; The body's reflective spectrum has a wavelength between 1282358 and the range of the range of tens of nanometers (nm). To achieve full color effect, the reflection spectrum must contain all The spectrum of visible light is also in the range of 4 〇〇 to 7 〇〇 nm. The method of solving the reflection spectrum is not wide enough to make the 曰 itself have a non-single pitch. Thus, the reflection of the cholesteric liquid crystal is as large as the second. As shown in the figure, the frequency of reflection of the cholesteric liquid crystal = ^ sees the frequency range, even reaching the entire visible range, so that the cholesterol liquid display can achieve full color effect. In U.S. Patent No. 5,948,831, as shown in the second figure Show, inventor 仏 (10) use Liquid crystal monomer (liquid crystalm〇n〇mer) and optically active monomer (A (four)
:〇_er)的混合形成膽固醇液晶。而兩者反應性質不同：前 者：晶單體具有一個活性雙鍵(加· b_d)不：J =早體則具有兩個活性雙鍵。在上、下兩透明基板10，及 :二2〇° = 二液晶單體與旋光性單體所混合而成的膽固 ΪΪΓ: t "Mi兩透明基板10及將膽固醇液 紫外光源的部分70會因為相互鍵結而形成旋疋光先二^ polymer)。由於旋光性單體具有兩個活性雙鍵，呈聚c = = 靠近紫外光源部分％的旋光性二^ ==分7。聚集，使此部分的因旋光性二 八有^長螺距__液晶⑽，達到加寬反射光譜的效果。 【發明内容】 鑑於上述之發明背景中，膽固醇液 上 一 省電、有記憶'性、廣視角、不閃爍等優點、面對比、 固醇液晶的螺距相關。因此，本發明之主射頻譜與膽 具有較寬螺距範圍的膽固醇液晶及其形成方法，、：：:::： 頻譜的膽固醇液晶。 提i、見反射 8 1282358 本發明的另一目的為，提供一膽固醇液晶及其形成方法， 可以減少旋光性單體的比例，進而降低成本。 根據以上所述之目的，本發明揭露了 一種膽固醇液晶的形 成方法。利用加入一具有活性雙鍵之旋光單體於一膽固醇液 晶，而膽固醇液晶由一未具有活性雙鍵之液晶與一未具活性雙 鍵之旋光劑所形成。然後利用兩道同調單頻光源，在膽固醇液 晶處發生干涉作用，使膽固醇液晶中之旋光性單體發生聚合反 應、’而使膽固醇液晶具有非單一之螺距。再者，膽固醇液晶亦 可增加未具有活性雙鍵之旋光劑，以減少旋光性單體的比例， 進而降低成本。 本發明也揭露了 一種膽固醇液晶的形成方法。利用加入一 具有活性雙鍵之液晶單體於一膽固醇液晶，膽固醇液晶由一未 具有活性雙鍵之液晶與一未具活十生雙鍵之旋光劑所形成。然後 利1兩道同調單頻光源，在膽固醇液晶處發生干涉作用，使膽 =酉子液日日中之液晶單體發生聚合反應，而使膽固醇液晶 早一之螺距。 曰本毛月也揭4 了一種膽固醇液晶的形成方法，此膽固醇液 ::液晶物質與一旋光物質所形成，液晶物質與旋光物質之 =、、活性雙鍵，另一不具有活性雙鍵。然後利用兩道同調單 ^目f、、纟膽固醉液晶處發生干涉作用，使該膽固醇液晶中之 活性雙鍵之物質發生聚合反應，而使膽 早一之螺距。 日，、π开 醇、广==係利用旋光性單體或液晶單體的聚合反應，使膽 疋光物f的分佈不均，而聚合反應高的地方的旋光 i如此可形成—個具有較寬螺距範圍的膽固醇液晶， J加i反射頻譜之目的。 【實施方式】 1282358 本發明的-些實施例料細描述如下。然而，除了詳細描 =，本發明逛可以廣泛地在其他的實施例施行 乾圍不受限定，其以之後的專利範圍為準。 a再者，為提供更清楚的描述及更易理解本發明，圖式内各 錯並沒有依照其機尺核圖，某些尺寸與其他相關尺度相 ”經被誇張；不相關之細節部分也未完全繪出，以求圖式的- 簡潔。 本發明的基本精神為，利用具有不同數量的活性雙鍵的液 ，向列型液晶、液晶單體與旋光劑（chiralagen〇、或旋光體所 混合而成的膽固醇液晶，使此膽固醇液晶在接近強光源的部分· 會有較強的聚合反應，而接近弱光源的部分的聚合反應較弱， 使方疋光物質因而產生濃度梯度，造成旋光物質較少，膽固醇液 晶的螺距出現變化。如此，使膽固醇液晶具有非單一的螺距， 而使膽固醇液晶的反射頻譜可以加寬。 、 本發明的一較佳實施例為利用混合了不可聚合的向列型液- 晶與旋光劑之膽固醇液晶中加入具有活性雙鍵的旋光性單體或 液晶單體所混合而成的膽固醇液晶。以加入旋光性單體為例， 由於無聚合性的向列型液晶及旋光劑不具有活性雙鍵，故與具 有活丨生雙鍵的旋光性單體有不同的數量的活性雙鍵，可形成具· 有非單一的螺距的膽固醇液晶，而達到加寬反射頻譜的膽固醇 液晶。 如第三圖所示，在上、下兩透明基板11〇,及間層物12〇 之間加入混合了不可聚合的向列型液晶、旋光劑之膽固醇液晶 中及具有活性雙鍵的旋光性單體所混合而成的膽固醇液晶 130 ’間層物12〇連接上、下兩透明基板11()及將膽固醇液晶 1固疋於其間。兩道同調（coherent)的雷射光140透過均光 擴束150，使雷射光14〇經發散而入射進入膽固醇液晶13〇。本 1282358 貝知例中’雷射光源140也可以是有同一到雷射光之分光或其 他適合的單頻光光源來取代，在此使用兩道同調的雷射光為僅 用來做說明，非用以限制光源的種類。這兩道雷射光會因為彼 此的^涉而在空間上產生光強度不一的分佈，光強度分佈曲線 160說明了兩道雷射光相互干涉後的光強度之空間分佈情況。 干涉場強處部分170為建設性干涉區域，光強度較強；干涉場 · ，處部分180為破壞性干涉區域，光強度較弱。在干涉場強處 =分170的膽固醇液晶中的旋光性單體會因為鍵結而形成旋光 -聚合物，而使旋光性單體的濃度減少。其他部分的旋光性單體 f因為濃度梯度的作原因，往濃度減少的干涉場強處部分17〇 聚集。在這些旋光性物質的聚集下，將使干涉場強處部分鲁 的膽固醇液晶形成具有短螺距的膽固醇液晶190。相反的，干 涉場，處f分18〇的旋光性單體則會因為濃度梯度的作用往旋 光性單體濃度較少的干涉場強處部分17〇移動，使得干涉場弱 處部分1/0的旋光性物質減少，因此，此處的膽固醇液晶會形· 成具有較長螺距的膽固醇液晶2〇〇。 但膽固醇液晶13〇若是不可聚合的向列型液晶、旋光劑之 膽固=液晶中及具有活性雙鍵的所混合而成的，液晶單體具有 ^ 雙Ί聚合’其光干涉強處部分的膽固醇液晶的螺距會 父長，而光干涉弱處部分的膽固醇液晶的螺距會較短，因此與春 上述的光強度與螺距的關係會恰好相反。 〃 “本貝加例中，在上、下兩透明基板110之上也可以有配向 2 rubbed P〇lyimide )，#由配向膜可以改善膽固醇液晶的排 Ά向。不過配向膜並非是絕對需要使用的，因為旋光性單體 向列垔液日日會有自發性排列（ntane〇us沉丨⑶如丨⑽ 性。再去，忠μ心 y ^ σ &彳也可以選擇加入或不加入於膽固醇液晶13 〇 中0 再者’亦可增加一組檢測光源與光感應器來判斷膽固醇液 11 1282358 晶是否已聚合完成。如第四圖所示，相較於第三圖，多出了檢 測光源210與光感應器220。檢測光源21〇與光感應器22〇分 別置於膽固醇液晶的相反兩側。檢測光源21〇為單頻光，較佳 的光源為雷射光源，且其波長為膽固醇液晶預定形成之反射頻 譜的最長或最短之波長，而光感應器22〇為單頻光感應器，與 檢測光源210的波長相互輕合。當膽固醇液晶聚合完成後，檢. 測光源21G的光會被反射而使光感應器22()所感應到檢測光源 210的強度減弱。最初膽固醇液晶未開始進行聚合反應時，光_ 感應器220所感應到的檢測光源21〇光強度與當膽固醇液晶聚 合至某程度時所感應到的強度會有一比值，當此比值為1〇以上 時，視為膽固醇液晶已完成聚合反應，較佳的比值為2〇以上。籲 當完成膽固醇液晶的聚合反應，將有產生一訊號，使雷射光14〇 停止照射膽固醇液晶。 因此，依本發明之形成方法所形成的膽固醇液晶，在垂直 上、下兩透明基板110表面的方向上，膽固醇液晶的螺距大致-上相同，但在平行上、下兩透明基板110表面的方向上，旋光_ 性物質的濃度會因光干涉作用所造成的影響而在空間上出現週 期性濃稀的變化’而使此方向上的膽固醇液晶的螺距也會在空 間上出現週期性長短的變化。 依本發明之較佳實施例，即可形成具有非單一螺距的膽固鲁 醇液晶’而使膽固醇液晶具有加寬的反射頻譜。而此具有加寬 的反射頻譜的膽固醇液晶的反射頻譜可以達到包含可見光的頻 譜範圍，因此可應用於反射式膽固醇液晶顯示器、液晶顯示器、 增党膜及全頻譜圓偏振片，此外，亦可應用於反射式或穿 的光拇之上。 本發明的另一較佳實施例為利用液晶物質與旋光物質的、、3 合而成得膽固醇液晶，其中_具有活性雙鍵，另—不呈活性2 鍵。也就是膽固醇液晶可以為液晶單體與旋光劑的混合，或= 12 1282358 與旋光單體的混合。由於膽固醇液晶中有不同的數 里的活性雙鍵的物質及旋光物質。因此同樣可形成且有 的螺距的膽固醇液晶，而達到加寬反射頻譜的膽固醇液晶。 = t上述第三圖所示的形成方法’上述利用液晶物質鱼 的，合而成得膽固醇液晶13〇經光干涉作用而形成光 :下兩透明基板u°表面的方向上，有週期性的 !的-=醇液晶在光強度強的建設性干涉部分170出現較 .ΛΚ a心，而在光強度弱的破壞性干涉部分180的聚合反 :乂：’使膽固醇液晶的螺距隨該處的旋光物質的濃度因的增 :曰二i而變長或變短’光強度與螺距的關係則視旋光物質或 ==質何者具有較多的活性雙鍵而定，例如：旋光物f具^ 性雙鍵時，光強度越強處，螺距越短。因此，由液日曰日 貝舁旋光物質的混合而成得膽固醇液晶，其中一具有活性雙 ί古！：不具活性雙，同樣可依如第三圖所示的形成方法形： 具有非早一的螺距的膽固醇液晶。 心而且若膽固醇液晶多了旋光劑，在光強度強的區域，膽固 酉予液晶的螺距由旋光聚合物及旋光劑來共同決定，而在光強度 弱的區域’膽固醇液晶的螺距主要由旋光劑來決定。因此，膽 =醇液日$中旋光單體的比例可以降低而減少旋光性單體的使用 1。而且，當光強度過強或照射過久，會使聚合反應過強，而 使膽固醇液晶内的各物質達到幾乎完全分離的狀態，使光強度 弱的，域僅主要由向列型液晶構成，而喪失了膽固醇液晶的特 2夕了不可聚合的旋光劑，京尤算光強度過強而使聚合反應過 ，在光強度弱的區域也至少包含有旋光劑，而仍保有膽固醇 液晶的特性。 綜合以上所述，本發明揭露了一種膽固醇液晶的形成方 法。利用加入一具有活性雙鍵之旋光單體於一膽固醇液晶，而 膽固醇液晶由一未具有活性雙鍵之液晶與一未具活性雙鍵之旋 13 1282358 光劑所形成。然後利用兩道同調單頻光源，在膽固醇液晶處發 tt涉作用，使膽固醇液晶中之旋光性單體發生聚合反應，而 {戢固知液晶具有非單一之螺距。再者，膽固醇液晶亦可增加 有活性雙鍵之旋光劑，以減少旋光性單體的比例’進而 低成本。 干 本發明也揭露了一種膽固醇液晶的形成方法。利用加入一 [活性雙鍵之液晶單體於__膽固醇液晶，膽 鍵之液晶與一未具活性雙鍵之旋光劑所形成。然； j 調單頻光源，在膽固醇液晶處發生干涉作用，使膦 曰中之液晶單體發生聚合反應，而使膽固醇 ; 早一之螺距。 、β外 晶由了 ：！膽固醇液晶的形成方法，此膽固醇液 一且有：：：二與：：光物質所形成，液晶物質與旋光物質之 畔井、择乂 一不具有活性雙鍵。然後利用兩道同調單 =、，在膽固醇液晶處發生干涉作 ：： 範圍的膽固醇液晶，而達到加寬反射頻譜具有較寬螺距 發明==發=實施例而已，並非用以限定本 完成之等效改變;二凡;::::本發明所揭爛^ 【圖式簡單說明】 第一圖係具有非單—螺距的_醇液晶的反射 币均應包含在下述之中請專利範圍。 頻譜； 具有非單一螺距的膽固醇 第二圖係習知技藝令，以紫外光形成 14 1282358 液晶之示意圓； 第三圖係本發明之一較佳實施例，以光干涉來形成具有非單— 螺距的贍固醇液晶之示意圖；以及 第四圖係本發明之_較佳實施例，增加檢測光源及光感應器以 偵測膽固醇液晶的聚合反應之示意圖。 【主要元件符號說明】 10 透明基板 20 間層物 30 膽固醇液晶 40 紫外光 70 罪近紫外光源的部分 80 遠離紫外光源的部分 90 短螺距的膽固醇液晶 100 長螺距的膽固醇液晶 110 透明基板 120 間層物 130 膽固醇液晶 140 雷射光 150 均光擴束 160 光強度分佈曲線 170 光強度干涉場強處部分 180 光強度干涉場弱處部分 190 短螺距的膽固醇液晶 200 長螺距的膽固醇液晶 210 檢測光源 220 光感應器The mixture of :〇_er) forms a cholesteric liquid crystal. The nature of the two reactions is different: the former: the crystal monomer has an active double bond (plus b_d) not: J = the early body has two active double bonds. On the upper and lower transparent substrates 10, and: two 2 〇 ° = two liquid crystal monomers and optically active monomers mixed together: t "Mi two transparent substrate 10 and the portion of the cholesterol liquid ultraviolet light source 70 will be formed by the mutual bonding to form a rotating light first two ^ polymer). Since the optically active monomer has two reactive double bonds, it is polyc = = close to the ultraviolet light source, and the optical rotation is 2 ===7. Aggregation, so that the optical rotation of this part has a long pitch __ liquid crystal (10), to achieve the effect of widening the reflection spectrum. SUMMARY OF THE INVENTION In view of the above-mentioned background of the invention, the cholesterol liquid has the advantages of power saving, memory 'sense, wide viewing angle, no flickering, and the like, and the pitch ratio of the sterol liquid crystal is related. Therefore, the main emission spectrum of the present invention and the cholesteric liquid crystal having a wide pitch range and a method for forming the same, the :::::: spectrum of cholesteric liquid crystal. I, see reflection 8 1282358 Another object of the present invention is to provide a cholesteric liquid crystal and a method for forming the same, which can reduce the proportion of optically active monomers and thereby reduce the cost. In accordance with the above objects, the present invention discloses a method of forming a cholesteric liquid crystal. The crystallization liquid crystal is formed by adding an optically active monomer having an active double bond to a cholesterol liquid crystal which is formed by a liquid crystal having no active double bond and an optically active agent having no active double bond. Then, using two coherent single-frequency light sources, interference occurs at the cholesterol liquid crystal to cause a polymerization reaction of the optically active monomer in the cholesteric liquid crystal, and the cholesteric liquid crystal has a non-single pitch. Further, the cholesteric liquid crystal can also increase the optically active agent having no active double bond to reduce the proportion of the optically active monomer, thereby reducing the cost. The present invention also discloses a method of forming a cholesteric liquid crystal. By adding a liquid crystal monomer having an active double bond to a cholesteric liquid crystal, the cholesteric liquid crystal is formed by a liquid crystal having no active double bond and an optically active agent having no living triple bond. Then, the two two-tone single-frequency light source are interfering with each other in the cholesteric liquid crystal, so that the liquid crystal monomer in the biliary scorpion liquid is polymerized in the daytime, and the phage liquid crystal is earlier than the pitch.曰本毛月 also revealed a method for forming a cholesteric liquid crystal, which is formed by a liquid crystal substance and an optically active substance, a liquid crystal substance and an optically active substance, and an active double bond, and the other has no active double bond. Then, using two homologous single-eyes, the interference occurs in the liquid crystal, and the substance of the active double bond in the cholesteric liquid crystal is polymerized, so that the biliary is first pitched. Day, π-opening alcohol, and wide == using a polymerization reaction of an optically active monomer or a liquid crystal monomer, so that the distribution of the cholesteric photon f is uneven, and the optical rotation i where the polymerization reaction is high can be formed. A wider pitch range of cholesteric liquid crystals, J plus i reflection spectrum for the purpose. [Embodiment] 1282358 Some embodiments of the present invention are described in detail below. However, in addition to the detailed description, the present invention can be widely practiced in other embodiments without limitation, which is subject to the scope of the following patent. In addition, in order to provide a clearer description and to more easily understand the present invention, the errors in the drawings are not in accordance with the rule of the machine, and some dimensions are exaggerated with other relevant scales; the unrelated details are not Completely drawn for the sake of simplicity - the basic spirit of the present invention is to use a liquid having a different number of active double bonds, a mixture of nematic liquid crystals, liquid crystal monomers and optical agents (chiralagen, or optically active substances). The cholesteric liquid crystal makes the cholesteric liquid crystal have a strong polymerization reaction in the part close to the strong light source, and the polymerization reaction of the part close to the weak light source is weak, so that the side light-emitting substance thus produces a concentration gradient, resulting in an optically active substance. Less, the pitch of the cholesteric liquid crystal changes. Thus, the cholesteric liquid crystal has a non-single pitch, and the reflection spectrum of the cholesteric liquid crystal can be broadened. A preferred embodiment of the present invention utilizes a mixed non-polymerizable nematic a liquid crystal in which a liquid crystal having a living double bond or a liquid crystal monomer is mixed with a liquid crystal of a crystal and a light-emitting agent. As an example of the optically active monomer, since the non-polymerizable nematic liquid crystal and the optically active agent do not have an active double bond, they have a different number of active double bonds than the optically active monomer having a living twin bond, and can be formed. · There is a non-single pitch of cholesteric liquid crystal, and the cholesteric liquid crystal that widens the reflection spectrum is obtained. As shown in the third figure, the non-polymerization is added between the upper and lower transparent substrates 11〇 and the interlayer 12〇. The cholesteric liquid crystal 130' inter-layer 12 of the nematic liquid crystal, the cholesteric liquid crystal of the optically active agent and the optically active monomer having the active double bond, and the upper and lower transparent substrates 11 () and the cholesteric liquid crystal 1 is fixed in between. Two coherent laser light 140 passes through the uniform light expansion beam 150, so that the laser light 14 is diverged and incident into the cholesteric liquid crystal 13 〇. This 1282358 case knows that 'the laser light source 140 It can be replaced by the same laser beam or other suitable single-frequency light source. Two homologous lasers are used here for illustration only, not for limiting the type of light source. Because of each other The spatial intensity distribution curve 160 illustrates the spatial distribution of the light intensity after the interference of the two laser beams. The interference field strength portion 170 is a constructive interference region, and the light intensity is different. Strong; interference field ·, part 180 is a destructive interference area, the light intensity is weak. The optically active monomer in the cholesteric liquid crystal at the interference field strength = 170 will form an optical-polymer due to the bonding. The concentration of the optically active monomer is reduced. The other part of the optically active monomer f is concentrated at the interference field strength portion where the concentration is decreased due to the concentration gradient. Under the aggregation of these optically active substances, the interference field will be made. The cholesteric liquid crystal of the strong part is formed into a cholesteric liquid crystal 190 having a short pitch. Conversely, the interference field, the optically active monomer with an angle of 18 〇, will have an interference field with less concentration of optically active monomers due to the concentration gradient. The strong portion 17 〇 moves, so that the optically active substance of the weak portion of the interference field is reduced by 1/0, and therefore, the cholesteric liquid crystal here forms a cholesteric liquid crystal having a longer pitch. . However, if the cholesteric liquid crystal 13 is a mixture of a non-polymerizable nematic liquid crystal, an optically active agent, a liquid crystal, and an active double bond, the liquid crystal monomer has a double-twisted polymerization. The pitch of the cholesteric liquid crystal will be the parent, and the pitch of the cholesteric liquid crystal in the weak part of the light interference will be shorter, so the relationship between the light intensity and the pitch of the above spring will be reversed. 〃 “In the case of Benbega, there may be 2 rubbed P〇lyimide on the upper and lower transparent substrates 110. # Alignment film can improve the enthalpy of the cholesteric liquid crystal. However, the alignment film is not absolutely necessary. Because the optically active monomer nematic sputum will spontaneously align every day (ntane〇us sinking (3) such as 丨 (10) sex. Go again, loyalty heart y ^ σ & 彳 can also choose to join or not Cholesterol liquid crystal 13 〇中0' can also add a set of detection light source and light sensor to determine whether the cholesterol liquid 11 1282358 crystal has been polymerized. As shown in the fourth figure, compared with the third figure, more detection The light source 210 and the light sensor 220. The detecting light source 21〇 and the light sensor 22〇 are respectively placed on opposite sides of the cholesteric liquid crystal. The detecting light source 21〇 is a single-frequency light, and the preferred light source is a laser light source, and the wavelength thereof is The longest or shortest wavelength of the reflection spectrum of the cholesteric liquid crystal is predetermined, and the light sensor 22 is a single-frequency light sensor, which is lightly coupled with the wavelength of the detection light source 210. When the condensed liquid crystal is completed, the light source 21G is detected. Light will be reflected The intensity of the detection light source 210 is weakened by the light sensor 22(). When the initial cholesteric liquid crystal does not start the polymerization reaction, the light source intensity of the detection light source 21 sensed by the light sensor 220 is different when the liquid crystal of the cholesterol is polymerized to some The intensity induced by the degree will have a ratio. When the ratio is above 1 ,, it is considered that the crystallization of the cholesteric liquid crystal has completed, and the preferred ratio is more than 2 。. When the polymerization of the cholesteric liquid crystal is completed, it will be produced. A signal causes the laser light to stop illuminating the cholesteric liquid crystal. Therefore, according to the cholesteric liquid crystal formed by the forming method of the present invention, the pitch of the cholesteric liquid crystal is substantially the same in the direction of the surface of the upper and lower transparent substrates 110, However, in the direction parallel to the surface of the upper and lower transparent substrates 110, the concentration of the optically active substance may periodically change in concentration due to the influence of the light interference effect, and the liquid crystal in this direction is cholesteric. The pitch of the space also varies spatially in length. According to a preferred embodiment of the invention, a gallbladder having a non-single pitch can be formed. The cholesteric liquid crystal has a widened reflection spectrum, and the cholesteric liquid crystal having a widened reflection spectrum can reflect the spectrum of visible light, so it can be applied to a reflective cholesteric liquid crystal display or a liquid crystal display. , augmented film and full-spectrum circular polarizer, in addition, can also be applied to the reflective or worn light. Another preferred embodiment of the present invention is a combination of a liquid crystal material and an optically active substance. It has cholesteric liquid crystal, in which _ has active double bond, and the other is not active 2 bond. That is, cholesteric liquid crystal can be a mixture of liquid crystal monomer and optically active agent, or = 12 1282358 mixed with optically active monomer. A substance with a reactive double bond in different numbers and an optically active substance. Therefore, it is also possible to form and have a pitch of cholesteric liquid crystal to achieve a cholesteric liquid crystal which broadens the reflection spectrum. = t The formation method shown in the above third figure 'The above-mentioned liquid crystal material fish are combined to form a cholesteric liquid crystal 13 〇 by light interference to form light: in the direction of the lower surface of the lower transparent substrate u°, there is periodicity The -= alcohol liquid crystal appears in the constructive interference portion 170 of the light intensity, and the polymerization of the destructive interference portion 180 in the weak light intensity is reversed: 乂: 'The pitch of the cholesteric liquid crystal is there. The concentration of the optically active substance increases: the length of the optically active substance becomes shorter or shorter. The relationship between the light intensity and the pitch depends on whether the optically active substance or the == mass has more active double bonds. For example, the optically active substance f has ^ When the double bond is used, the stronger the light intensity, the shorter the pitch. Therefore, the liquid crystals of the shellfish are made up of a mixture of liquid crystals, one of which has an active double 古 ancient! : It has no active double, and can also be formed according to the formation method shown in the third figure: a cholesteric liquid crystal having a pitch that is not earlier than one. Heart and if the cholesteric liquid crystal has more optically active agent, in the region where the light intensity is strong, the pitch of the cholesteric liquid crystal is determined by the optically active polymer and the optical rotatory agent, and in the region where the light intensity is weak, the pitch of the cholesteric liquid crystal is mainly caused by the optical rotation. Agent to decide. Therefore, the ratio of the optically active monomer in the gallium = alcohol solution can be reduced to reduce the use of optically active monomers. Moreover, when the light intensity is too strong or the irradiation is too long, the polymerization reaction is too strong, and the substances in the cholesteric liquid crystal are almost completely separated, so that the light intensity is weak, and the domain is mainly composed of nematic liquid crystal. However, the optically active liquid-emitting agent which has lost the cholesteric liquid crystal has a too strong light intensity to cause polymerization reaction, and at least a light-emitting agent is contained in a region where light intensity is weak, and the characteristics of the cholesteric liquid crystal are retained. In summary, the present invention discloses a method of forming a cholesteric liquid crystal. An oligochromic liquid having an active double bond is added to a cholesteric liquid crystal, and the cholesteric liquid crystal is formed by a liquid crystal having no active double bond and a non-active double bond spinning 13 1282358. Then, using two coherent single-frequency light sources, the TT liquid reacts at the cholesteric liquid crystal to polymerize the optically active monomer in the cholesteric liquid crystal, and the liquid crystal has a non-single pitch. Further, the cholesteric liquid crystal may also increase the optically active double bond optical rotatory agent to reduce the ratio of the optically active monomer', thereby being low in cost. Drying The present invention also discloses a method of forming a cholesteric liquid crystal. It is formed by adding a liquid crystal monomer of active double bond to __cholesterol liquid crystal, a liquid crystal of a bile bond and an optically active agent having no active double bond. However; j single-frequency source, interference occurs in the cholesteric liquid crystal, so that the liquid crystal monomer in the phosphine is polymerized, and the cholesterol; early pitch. , β outer crystal by :! A method for forming a cholesteric liquid crystal, wherein the cholesterol liquid is formed by:::2 and :: a light substance is formed, and the liquid crystal substance and the optically active substance are not in the active double bond. Then use two homologous single =,, interference occurs in the cholesteric liquid crystal:: range of cholesteric liquid crystal, and reach a widened reflection spectrum with a wider pitch invention == hair = embodiment, not to limit the completion of this Effect change; 二凡;:::: The invention is disclosed. [Simplified description of the drawing] The first figure is a reflection coin having a non-single-pitch _ alcohol liquid crystal, which should be included in the following patent scope. Spectrum; a second figure of cholesterol having a non-single pitch is a conventional technique for forming a schematic circle of 14 1282358 liquid crystal by ultraviolet light; the third figure is a preferred embodiment of the present invention, which is formed by light interference to form a non-single- A schematic diagram of a pitched sterol liquid crystal; and a fourth embodiment of the present invention, a schematic diagram of increasing the detection source and the photosensor to detect the polymerization of cholesteric liquid crystal. [Main component symbol description] 10 Transparent substrate 20 Interlayer 30 Cholesterol liquid crystal 40 Ultraviolet light 70 Part of the near ultraviolet light source 80 Part 90 away from the ultraviolet light source Short-pitch cholesterol liquid crystal 100 Long-pitch cholesterol liquid crystal 110 Transparent substrate 120 interlayer Object 130 Cholesterol liquid crystal 140 Laser light 150 Uniform light beam expansion 160 Light intensity distribution curve 170 Light intensity Interference field strength part 180 Light intensity Interference field weak part 190 Short pitch cholesterol liquid crystal 200 Long pitch cholesterol liquid crystal 210 Detection light 220 Light sensor
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