200830007 九、發明說明： 【發明所屬之技術領域】 本發明係關於液晶（LC)塗佑她 ^ 、 又佈機，其能在塗佈時計算液 晶滴數目的液晶塗佈機。 【先前技術】 平面顯示器（FPDs)包括持錄+秘 一 加的技術，使得影像顯 不器較使用陰極射線管的傳統電禎 — 毛说和影像顯示器更輕而且更 薄，而且厚度通常小於10公分（ 一 V4央吋）。需要持績更新的平 面顯示器包括液晶顯示器（LCDs)、電漿顯示器、場發射顯示 & CFEDs) '有機發光二極體顯示器（〇leDs)、表面傳導電 子發麵4 (卿小奈料軸科（N£Ds)以及電致 發光顯示器（ELDs)。 曰液晶顯示器（LCD)是由數個彩色或單色的晝素在光源或 是反射板前雖陣翻’所組成的薄辭_示裝置。液晶顯 示态因為使用非常小的電力能源而被廣泛地利用。 用於液晶顯示器的液晶面板的製造過程如下。 彩色濾光片和共用電極的圖案先形成於上玻璃基板。薄犋 5 200830007 電晶體（TFT)和晝素電極的圖案則形成在相對於上玻璃基板 的下玻璃基板上。配向層則分別形成在上和下玻璃基板上。每 個配向層都會被摩擦以提供麵角以及方向，給將形成於配向 層間之液晶層的液晶分子。 接著使用點膠機以形成膠圖案在上和下玻璃基板其中之 着 一，來始、封上及下玻璃基板，而液晶層將存在於其間。在此之 後’液晶塗佈機用來塗佈液晶於形成膠圖案的玻璃基板上。接 者，組裝上及下玻璃基板以形成液晶面板。上及下玻璃基板的 組裝成品在切割和裂片過程中被分成各別的面板。 液晶塗佈機包括-平台、—塗佈頭部單元，以及一塗佈頭 部單元支撐框架’財撐塗_解元。塗佈頭部單元包括盛 _ 驗晶敝射ϋ、_其而塗驗晶时嘴，以及_莫組以 對液晶施加壓力使其透過喷嘴塗佈。 在維持喷嘴和基板之_定__時，將承紐板的平 台在Υ軸方向上移動，或是將塗佈頭部單元在χ軸方向上移 動或疋在XΥ軸方向上移動兩者，讓液晶塗佈機透過喷嘴 將液晶塗佈在基板上。如此一來，包含在注射器中的液晶以液 6 200830007 滴的形式從噴嘴滴到基板上。當幫浦中的柱體每旋轉360度， 就有一滴液晶液滴從喷嘴滴到基板上。 在塗佈之前’必須要決定在之後的每個面板上形成液晶層 所需的液晶參考量。傳統的液晶塗佈機根據液晶的參考量，來 控制柱體的旋轉次數以滴下液晶滴。柱體旋轉的次數是將液晶 • 够考量除崎滴量所得出的。細，«在注射器中的液晶 中可月b存在有氣泡。因此當幫浦模組中的柱體旋轉度，氣 泡就從喷嘴排出。這樣會導致液晶的參考量和液晶的實際塗佈 量之間的誤差。操作員被要求目視檢查液晶的參考量是否塗佈 到玻璃基板上的每個面板區域。 的目視檢查f要射A量經驗的操作員以及實驗以 瞻確認準確性。此外，在進行目視檢查時需要巾斷液晶塗佈的操 【發明内容】 有鑑於此，本發明的目的之一在於提供—種液晶塗佈機， 以猎由#在塗佈過程中液晶滴的數目來自動檢 佈了液晶的參考量。 7 200830007 根據本發明的-個目的在於提供―種液晶塗_，其Μ 脑少—喷嘴，可相對於基板轴，自其滴下-液晶滴；-供 應單兀’用以供應液晶至該噴嘴；以及一計數單元，包括：一 感應器’用以躺液晶滴從喷嘴滴下；以及—控制單元，根據 來自感應器的資料計算液晶滴的數目以檢查是否實際滴下一200830007 IX. INSTRUCTIONS OF THE INVENTION: TECHNICAL FIELD The present invention relates to a liquid crystal (LC) coating and a liquid crystal coater capable of calculating the number of liquid crystal droplets at the time of coating. [Prior Art] Flat panel displays (FPDs) include the technology of recording + secret addition, making the image display device lighter and thinner than conventional cathode lamps and image displays using cathode ray tubes, and the thickness is usually less than 10 Gongzi (a V4 central government). Flat-panel displays requiring updated performance include liquid crystal displays (LCDs), plasma displays, field emission displays & CFEDs) 'organic light-emitting diode displays (〇leDs), surface conduction electrons 4 (Qing Xiaonai (N£Ds) and electroluminescent displays (ELDs). The liquid crystal display (LCD) is a thin-word display device consisting of several colored or monochromatic halogens in front of a light source or a reflector. The liquid crystal display state is widely used because it uses a very small power source. The manufacturing process of the liquid crystal panel for a liquid crystal display is as follows. The pattern of the color filter and the common electrode is first formed on the upper glass substrate. Thin 犋 5 200830007 A pattern of (TFT) and a halogen electrode is formed on the lower glass substrate with respect to the upper glass substrate. The alignment layers are respectively formed on the upper and lower glass substrates, and each alignment layer is rubbed to provide a face angle and a direction. Giving liquid crystal molecules to be formed in the liquid crystal layer between the alignment layers. Next, a dispenser is used to form a glue pattern on the upper and lower glass substrates to start, seal, and lower the glass. a plate, and a liquid crystal layer will be present therebetween. After that, the 'liquid crystal coater is used to coat the liquid crystal on the glass substrate forming the glue pattern. The upper and lower glass substrates are assembled to form a liquid crystal panel. Upper and lower glass The assembled assembly of the substrate is divided into individual panels during the cutting and splitting process. The liquid crystal coating machine includes a platform, a coating head unit, and a coating head unit supporting frame. The cloth head unit includes a _ 验 敝 ϋ ϋ _ _ _ _ 涂 涂 涂 涂 , , , , , , , , , 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 , , , , Moving the platform of the bearing plate in the direction of the x-axis, or moving the coating head unit in the direction of the x-axis or moving in the X-axis direction, allowing the liquid crystal coating machine to apply the liquid crystal through the nozzle On the substrate, the liquid crystal contained in the syringe is dropped from the nozzle onto the substrate in the form of a liquid 6 200830007. When the cylinder in the pump rotates 360 degrees, a drop of liquid crystal droplets is dropped from the nozzle to the substrate. On. Before the coating, 'must be decided The liquid crystal reference amount required for forming the liquid crystal layer is formed on each of the subsequent panels. The conventional liquid crystal coater controls the number of rotations of the cylinder to drop the liquid crystal droplets according to the reference amount of the liquid crystal. The number of times the cylinder is rotated is liquid crystal. • It is enough to consider the amount of the drop in the amount of sagas. Fine, «The liquid crystal in the syringe can have bubbles in the moon b. Therefore, when the cylinder in the pump module rotates, the bubble is discharged from the nozzle. This will cause the liquid crystal. The error between the reference amount and the actual coating amount of the liquid crystal. The operator is required to visually check whether the reference amount of the liquid crystal is applied to each panel area on the glass substrate. The visual inspection f is an operator who wants to shoot A amount of experience. And the experiment to confirm the accuracy. In addition, in the visual inspection, it is necessary to wipe the liquid crystal coating. [Invention] In view of this, one of the objects of the present invention is to provide a liquid crystal coating machine, with hunting by # The reference amount of the liquid crystal is automatically checked by the number of liquid crystal droplets during the coating process. 7 200830007 According to the invention, it is an object of the invention to provide a liquid crystal coating, which has a small amount of nozzles, from which a liquid crystal droplet can be dropped with respect to a substrate axis, and a supply unit 兀 to supply liquid crystal to the nozzle; And a counting unit comprising: a sensor 'to drop a liquid crystal droplet to drip from the nozzle; and a control unit to calculate the number of liquid crystal droplets based on the data from the sensor to check whether the actual drop
液晶參考量。 、 本發明之前似及其他的目的、獅、方㈣及優點，將 藉由隨後關於本發明的詳細描述配合對應_式而清楚了解。 【實施方式】 將以本發明的實施例詳細描述以供參考，並對應圖式舉 例。 第1圖係為説明根據本發明—液晶塗佈機實施例之剖面 圖。 如第1圖所示’根據本發明實施例之液晶塗佈機1〇〇，包 括至少—喷嘴111，透過噴嘴ill使液晶麵在基板1〇上。 8 200830007 貝鳴111可相對於基板移動。噴嘴m連接到安裝在塗佈 頭部單元m㈣嘴塊112。塗佈頭部單元⑽係由頭部支撐 框.102所支撐，並可在一方向上移動。頭部支撐框架搬 的兩端均固定於液晶塗佈機社體⑼，並可在與塗佈頭部單 元110的移動方向垂直的方向上移動。因此安裝在塗佈頭部單 元110的喷嘴111可相對於基板10移動。仔細地說，喷嘴出 可相對於基板於X和γ方向上移動，以於塗佈時維持喷嘴⑴ 和基板10之間固定的距離。 供應單元m提供喷嘴U1在之後於面板上形成液晶層所 需的液晶參考量。在幫浦模組122中的柱體根據液晶參考量旋 轉’以從喷嘴111滴下液晶至基板咖板區域。在基板上有複 數個面板區域。在此之後，上及下基板的組裝成品在切割和裂 片過程中被分成各別的面板。 供應單兀120包括盛裝液晶的注射器121和幫浦模組 。％浦杈組122對液晶施加壓力以從噴嘴m滴下液晶滴。在 幫浦模組122中的柱體的旋轉，以開啟以及關閉從注射器121 到贺嘴111的液晶流體，使得液晶滴可以滴到基板的面板區域。 9 200830007 广供應單元120可包括氣壓供應單元，以提供氣壓以及闕。 氣壓供應單元提供空氣或氣體至注射器⑵，使液晶滴從喷嘴 111滴下。_開啟或義從注射器121㈣嘴ιη的液晶流 體，使得液晶滴可滴到基板之面板區域。供應單元120並不限 於雨述裝置，亦可包括任何可_液晶流體者。 也可提供兩個或多個喷嘴，以同時將液晶參考量塗佈在大 尺寸基板的兩個或多個面板區域上。在面板製域，上及下基 板的組裝成品在切割和裂片過程中被分成各別的面板。每個面 板可應用成筆記型電腦的螢幕、平面顯示器以及LCD電視。 在塗佈之前’先決定之後面板上形成液晶層所需的液晶參 考量。接著幫浦模組中的柱體根據液晶參考量旋轉。如此一來 ，液晶就以液滴的形式塗佈在面板區域上。然而實際塗佈在面 板區域的液晶量可能少於或多於液晶參考量。這是因為盛裝在 注射器中的液晶有氣泡的存在。也就是當柱體旋轉時，會排出 氣泡而不是液晶。 计數單元130決定了液晶參考量是否實際地塗佈到面板 200830007 區域上。為了達到這個目的，計數單元13〇計算從喷嘴⑴ 下的液晶滴數目。如此-來，就可以自動決定液晶參考量= 真正地塗佈到面板區域’而不必中斷塗佈過程以進行::檢 查。 計數單元13G包括感應器、131以及控制單元ΐ4ι。Liquid crystal reference amount. The foregoing and other objects, lions, squares, and advantages of the present invention will be apparent from the following detailed description of the invention. [Embodiment] The embodiments of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view showing an embodiment of a liquid crystal coater in accordance with the present invention. As shown in Fig. 1, a liquid crystal coater 1 according to an embodiment of the present invention includes at least a nozzle 111 through which a liquid crystal surface is placed on a substrate 1 through a nozzle ill. 8 200830007 Baying 111 can be moved relative to the substrate. The nozzle m is connected to a nozzle block 112 mounted on the coating head unit m (four). The coating head unit (10) is supported by the head support frame .102 and is movable in one direction. Both ends of the head support frame are fixed to the liquid crystal coater body (9), and are movable in a direction perpendicular to the moving direction of the coating head unit 110. Therefore, the nozzle 111 mounted on the coating head unit 110 can be moved relative to the substrate 10. In particular, the nozzles are movable relative to the substrate in the X and gamma directions to maintain a fixed distance between the nozzle (1) and the substrate 10 during coating. The supply unit m provides the liquid crystal reference amount required for the nozzle U1 to form a liquid crystal layer on the panel thereafter. The cylinder in the pump module 122 is rotated according to the liquid crystal reference amount to drop the liquid crystal from the nozzle 111 to the substrate coffee plate area. There are a plurality of panel areas on the substrate. After that, the assembled products of the upper and lower substrates are divided into individual panels during the cutting and dicing process. The supply unit 120 includes a syringe 121 for holding a liquid crystal and a pump module. The % Pu'er group 122 applies pressure to the liquid crystal to drop the liquid crystal droplets from the nozzle m. The rotation of the cylinder in the pump module 122 opens and closes the liquid crystal fluid from the injector 121 to the mouthpiece 111 so that the liquid crystal droplets can drip onto the panel area of the substrate. 9 200830007 The wide supply unit 120 may include a pneumatic supply unit to provide air pressure and helium. The air pressure supply unit supplies air or gas to the syringe (2) to cause the liquid crystal droplet to drip from the nozzle 111. The liquid crystal fluid of the nozzle 121 is turned on or off, so that the liquid crystal droplets can drip onto the panel area of the substrate. The supply unit 120 is not limited to the rain device, and may include any liquid crystal. Two or more nozzles may also be provided to simultaneously apply the liquid crystal reference amount to two or more panel regions of the large-sized substrate. In the panel area, the assembled products of the upper and lower substrates are divided into individual panels during the cutting and splitting process. Each panel can be used as a notebook screen, flat panel display, and LCD TV. The liquid crystal reference amount required to form the liquid crystal layer on the rear panel is determined before coating. Then the cylinder in the pump module rotates according to the liquid crystal reference amount. In this way, the liquid crystal is applied to the panel area in the form of droplets. However, the amount of liquid crystal actually applied to the panel area may be less than or greater than the liquid crystal reference amount. This is because the liquid crystal contained in the syringe has the presence of air bubbles. That is, when the cylinder is rotated, bubbles are discharged instead of liquid crystal. The counting unit 130 determines whether the liquid crystal reference amount is actually applied to the panel 200830007 area. To achieve this, the counting unit 13 calculates the number of liquid crystal droplets from the nozzle (1). In this way, the liquid crystal reference amount = true coating to the panel area can be automatically determined without interrupting the coating process for:: inspection. The counting unit 13G includes an inductor, 131, and a control unit ΐ4ι.
感應器131祕從嘴嘴111滴下的液晶滴。如第2圖所 示’感應器131包括發射部132以發射光線，以及接收部⑶ 乂接收毛射自發射部131的光線。發射部⑶以及接收部出 延伸到噴嘴111之下，加n舰於兩者之間，使得從發射 σρ ΐ32發射的光線可以通過喷嘴U1下方，制達接收部133。The sensor 131 secretly drops liquid crystal droplets from the nozzle 111. As shown in Fig. 2, the sensor 131 includes a transmitting portion 132 to emit light, and the receiving portion (3) receives light from the emitting portion 131. The transmitting portion (3) and the receiving portion extend below the nozzle 111, and the n-ship is interposed therebetween so that the light emitted from the emission σρ ΐ32 can pass under the nozzle U1 to form the receiving portion 133.
如第3圖所示’發射部132可包括複數個發射頭。如此一 來1 任何方向滴下的任何液晶滴可阻隔發射自複數個發射頭 的^光、.泉。也就是說，發射自任—個發射頭肋的光線可 以自贺嘴1U傾斜滴下的液晶滴所反射。 32係使用填入光纖的塑膠以射出成型所製成。其 中最簡單的形 八就疋，兩根或多根光纖以規則間隔成列地設置 200830007 在模/、凹;ί曰接著就盍起來並注入樹脂。在這個時候，每根光 纖用來當作發射頭的一端，並沒有被樹脂覆蓋。這些光纖可以 規則間隔紐、朗或絲也朗的方奴置在讀被封閉且 庄入树月曰的模具凹槽中。在這種情況下，發射頭係以固定間隔 成行、成列或成行也成列的方式排列。 _ 如第4Α圖所示，當自發射部m發射出的光線被液晶滴 反射，使得接收部無法接收到光線時，感應器 131就感應到液 晶滴的滴下。如第4Β圖所示’當自發射部發射出的光線沒有 被液晶滴反射’使得接收部可以接收到光線時，感應器131 就感應到沒有液晶滴的滴下。 在發射部132具有複數個發射頭的情況下，當接收部133 • 沒有接收到所有自發射頭必所發射的光線時，感應器131 就感應到液晶滴自喷嘴111滴下。 感應态131可以進一步包括蓋子134。蓋子134可以避免 液晶滴從基板10彈起，並回到發射部132以及接收部〗33之 間。換吕之，盍子134避免來自發射部132的光線自一旦彈起 的液晶滴反射。這就可以避免可能重複計算的誤差。 12 200830007 盍子134在中央具有一開口 ma，且提供在發射部⑶ 和接收部134的兩個較低端，使得開口⑽的位置剛好在喷 134下方。開口 i34a夠大以使得液晶滴可以穿過而不會被 阻檔。蓋子134、發射部132以及接收部133可以一體成型以 形成感應器131。這樣做可以方便地將感應器131和喷嘴塊⑴ • 連接，而不需要調整發射部132和接收部133的位置。 控制單元141根據感應器131提供的資料，以計算從喷嘴 m滴下驗晶滴陳目來決定衫少液晶實際被塗佈在基板 的每個面板區域。接著，控制單元141比較液滴的計數和液滴 的苓考數，以決定實際塗佈的液晶量是否不合規格。 ❿參考數是每-面板所需滴入的液晶滴的數目。液晶滴的參 考數（RN)是由下列公式所得出：As shown in Fig. 3, the transmitting portion 132 may include a plurality of transmitting heads. In this way, any liquid crystal droplets dropped in any direction can block the light and spring emitted from a plurality of emitters. That is to say, the light emitted from any of the ribs of the emitter head can be reflected from the liquid crystal droplets which are obliquely dropped from the mouthpiece 1U. The 32 series is made by injection molding using a plastic filled with an optical fiber. The simplest of these is the case where two or more fibers are placed in regular intervals in 200830007 in the mold/concave; then the crucible is picked up and injected with resin. At this time, each fiber is used as the end of the emitter and is not covered by the resin. These fibers can be placed in the groove of the mold that is closed and spliced into the tree. In this case, the emitters are arranged in rows, columns or rows in a fixed interval. _ As shown in Fig. 4, when the light emitted from the emitting portion m is reflected by the liquid crystal droplet so that the receiving portion cannot receive the light, the sensor 131 senses the dropping of the liquid crystal droplet. As shown in Fig. 4, when the light emitted from the emitting portion is not reflected by the liquid crystal droplets, so that the receiving portion can receive the light, the sensor 131 senses that no liquid crystal droplets are dripped. In the case where the transmitting portion 132 has a plurality of transmitting heads, when the receiving portion 133 does not receive all the light that must be emitted from the transmitting head, the sensor 131 senses that the liquid crystal droplets drip from the nozzle 111. The sensed state 131 can further include a cover 134. The cover 134 prevents the liquid crystal droplets from bounce off the substrate 10 and returns to between the emitting portion 132 and the receiving portion 33. In other words, the dice 134 prevents the light from the emitting portion 132 from being reflected from the liquid crystal droplets that are bounced. This avoids errors that may be repeated. 12 200830007 The dice 134 has an opening ma in the center and is provided at the lower ends of the transmitting portion (3) and the receiving portion 134 such that the opening (10) is positioned just below the jet 134. The opening i34a is large enough so that the liquid crystal droplets can pass through without being blocked. The cover 134, the emitting portion 132, and the receiving portion 133 may be integrally formed to form the inductor 131. This makes it easy to connect the sensor 131 and the nozzle block (1) • without adjusting the positions of the transmitting portion 132 and the receiving portion 133. The control unit 141 determines, based on the data supplied from the sensor 131, the drop of the crystallographic drop from the nozzle m to determine the area in which each of the panel is actually coated on the substrate. Next, the control unit 141 compares the count of the droplets with the number of droplets of the droplets to determine whether the amount of liquid crystal actually applied is out of specification. The ❿ reference number is the number of liquid crystal drops that need to be dropped per panel. The reference number (RN) of the liquid crystal droplet is obtained by the following formula:
參考量/DA 其中參考量是在每片面板形成液晶層所需的液晶量，而DA是 液滴量。當液滴的計數小於或大於參考數(RN)，控制單元141 決定液晶的實際塗佈量不合規格。 13 200830007 控制單元141可以使用警告單元（未緣示）來警告操作員 液晶量不合規格。 控制早元141可以猎由比較液晶貫際塗佈量和參考量，決 定液晶實際塗佈量是否不合規格。液晶實際塗佈量是將液晶滴 的數目乘以液滴罝（DA)。當液晶實際塗佈量小於或大於灸考 量時，控制單元141決定液晶的實際塗佈量不合規格。 控制單元141可獨立於控制液晶塗佈機的塗佈操作的主 控制單元來運作。 控制單元Ml可以下列公式計算在注射$⑵中的液晶剩 餘量= & · • · - · -*.· - 其中BA是在注射器121中液晶剩餘量，伙是在注射器⑵ 中的液晶初始總量，而ΑΑ是液晶滴的累計數，da則是液滴 量。 有了控制單元141計算在注射財的液關餘量的功能 ，就不需要钱糾—個設備來確認靖器121巾是否袋有足 14 200830007 夠進行塗佈操作的液晶。 控制單元141可在開始塗佈操作之前偵測在嘴嘴ln的尖 疋否有液晶滴的存在。感應器131會感應到在噴嘴I〗〗的+ 端有液晶滴的存在。當液晶滴從噴嘴131適當地滴下時，從發 射部132發射的光線從液滴反射一次。然而當液晶滴停駐在喷 嘴111的尖端時，從發射部132發射的光線就會持續地從停駐 在噴嘴111尖端的液晶滴反射。如此一來，控制單元141就可 以藉由辨識由感應器131感應到的兩種不同的訊號來偵測到 在1111尖端的液晶滴的存在。 彳工制單元141可以使用警告單元（未缘示）警告操作員在 噴嘴111的尖端有液晶滴的存在。如此一來，塗佈頭部單元可 移到方便操作員移除在喷嘴⑴尖端的液晶滴的位置。 θ根據本發明的液晶塗佈機提供自動判斷液晶實際塗饰量 ^否不合規格爾不需娜卜安裝制設備即可提供關於液 曰曰剩餘量的優點。 毛月可在不偏離所具有的精神或必要特點的情形下以 15 200830007 1的屯式^ %注意麵的實關除非制提到，並不限 於=述描述中的任何細節，而是應該廣泛地推論至下列申請專 利範圍所絲的精神和範圍之中，因此所有落於申請專利範圍 ’或均等者之邊財的改變或異畴舰之後的 所紅全。 【圖式簡單說明】 所附圖式是為了提供對本發明進一步的了解，並組成本說 明書的-部分，也朗本發_實_而且與詳細描述一起解 釋本發明的原理。在這些圖式中： 扪圖係根據本發明的—液晶塗佈機實施例的剖面圖； 第2圖係第1圖所示噴嘴以及計數單元之透視圖； 第3圖係第2圖感應器之透視圖；以及 第4Α圖和第4Β圖係第2圖的感應器感應液晶滴自喷嘴滴 下之剖面圖。 【主要元件符號說明】 10基板 100液晶塗佈機 101主體 102頭部支撐框架 - 16 200830007 110塗佈頭部單元 111喷嘴 112喷嘴塊 120供應單元 121注射器 122幫浦模組 130計數單元 131感應器 132發射部 132a發射頭 133接收部 134蓋子 134a 開口 141控制單元Reference amount / DA where the reference amount is the amount of liquid crystal required to form a liquid crystal layer on each panel, and DA is the amount of liquid droplets. When the count of the droplets is smaller or larger than the reference number (RN), the control unit 141 determines that the actual coating amount of the liquid crystal is out of specification. 13 200830007 The control unit 141 can use the warning unit (not shown) to warn the operator that the liquid crystal amount is out of specification. Controlling the early element 141 can be performed by comparing the amount of liquid crystal coating and the reference amount to determine whether the actual coating amount of the liquid crystal is out of specification. The actual amount of liquid crystal coating is obtained by multiplying the number of liquid crystal droplets by droplet enthalpy (DA). When the actual coating amount of the liquid crystal is less than or greater than the moxibustion amount, the control unit 141 determines that the actual coating amount of the liquid crystal is out of specification. The control unit 141 can operate independently of the main control unit that controls the coating operation of the liquid crystal coater. The control unit M1 can calculate the remaining amount of liquid crystal in the injection $(2) by the following formula = & · · · - - -.. - where BA is the remaining amount of liquid crystal in the syringe 121, and the initial total of the liquid crystal in the syringe (2) Quantity, and ΑΑ is the cumulative number of liquid crystal droplets, and da is the amount of droplets. With the function of the control unit 141 calculating the liquid level remaining amount of the injection, it is not necessary to use a device to confirm whether or not the container has a foot. 14 200830007 A liquid crystal capable of performing a coating operation. The control unit 141 can detect the presence of liquid crystal droplets at the tip of the nozzle ln before starting the coating operation. The sensor 131 senses the presence of liquid crystal droplets at the + end of the nozzle I. When the liquid crystal droplets are appropriately dropped from the nozzle 131, the light emitted from the emitting portion 132 is reflected once from the liquid droplets. However, when the liquid crystal drip stops at the tip end of the nozzle 111, the light emitted from the emitting portion 132 is continuously reflected from the liquid crystal droplets parked at the tip end of the nozzle 111. In this way, the control unit 141 can detect the presence of liquid crystal droplets at the tip of the 1111 by recognizing two different signals sensed by the sensor 131. The ergonomic unit 141 can warn the operator of the presence of liquid crystal droplets at the tip end of the nozzle 111 using a warning unit (not shown). As such, the coating head unit can be moved to a position where the operator can remove the liquid crystal droplets at the tip end of the nozzle (1). θ According to the liquid crystal coater of the present invention, it is provided to automatically judge the actual amount of liquid crystal to be coated. ^ If it is not in conformity, the advantage of the remaining amount of liquid can be provided without the need for a device to be installed. Maoyue can pay attention to the actual situation of 15 200830007 1 without deviating from the spirit or necessary characteristics. Unless it is mentioned, it is not limited to any details in the description, but should be widely It is inferred to the spirit and scope of the following patent application scope, and therefore all the changes that fall within the scope of the patent application's or the equivalents or the red ones after the alien ship. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are intended to provide a further understanding of the invention In the drawings: a cross-sectional view of an embodiment of a liquid crystal coater according to the present invention; a second view is a perspective view of the nozzle and the counting unit shown in FIG. 1; and a third figure is a second figure sensor The perspective view; and the fourth and fourth diagrams of the second embodiment of the sensor sense liquid crystal droplets from the nozzle drop profile. [Main component symbol description] 10 substrate 100 liquid crystal coater 101 main body 102 head support frame - 16 200830007 110 coating head unit 111 nozzle 112 nozzle block 120 supply unit 121 injector 122 pump module 130 counting unit 131 sensor 132 transmitting portion 132a transmitting head 133 receiving portion 134 cover 134a opening 141 control unit