201120538 六、發明說明： 【發明所屬之技術領域】 本發明一般關於液晶塗佈機，尤其是關於控制液晶滴落 到基板之裝置。 【先前技術】 一般而言，液晶顯示(LCD)包含下基板、上基板、密 封劑、以及液晶層。下基板具有驅動裝置(例如電晶體)於平 面玻璃上。上基板具有彩色滤光層於平面玻璃上。密封劑用 於將下基板及上基板彼此附接❶液晶層填充於下基板與上基 板之間。藉由形成於下基板上的驅動裝置，此類液晶顯示器 驅動液晶層中的液晶分子，並藉由驅動液晶分子來控制通過 液晶層的光強度，因而顯示資訊。 根據液晶顯示器製造方法’驅動裝置形成於具有預定尺 寸的玻璃以製造基板，而彩色濾光層形成於另一片玻璃以製 造另一基板。再者，密封劑以預定圖案塗佈於這兩個基板的 任者上，液晶滴以點形式滴落在密封劑限制的區域内之 後將兩個基板彼此黏接。當兩個基板彼此黏接時，液晶滴圖 案形成兩個基域的液晶層。域兩個基板彼邮接而製成 的母玻璃，來製造構成液晶顯示器的單位液晶面根。 g製造方法執行於依序配置具有個別功能的各製造裝置 造生產線。在眾多製造裝置巾，塗佈機實施滴落液晶的 程序以及排出密封劑的程序。 參考圖1詳細說明滴驗晶的程序。® 1為顯示-般塗 201120538 2之透視圖。首先，欲滴落液晶於其上的基板剛放置在 f 2框架200之平台300上。當頭單元400樹康預先輸人201120538 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates generally to liquid crystal coaters, and more particularly to apparatus for controlling the dripping of liquid crystals onto a substrate. [Prior Art] In general, a liquid crystal display (LCD) includes a lower substrate, an upper substrate, a sealing agent, and a liquid crystal layer. The lower substrate has a driving device (e.g., a transistor) on the flat glass. The upper substrate has a color filter layer on the flat glass. A sealant is used to attach the lower substrate and the upper substrate to each other, and a liquid crystal layer is filled between the lower substrate and the upper substrate. Such a liquid crystal display drives liquid crystal molecules in the liquid crystal layer by driving means formed on the lower substrate, and controls the light intensity passing through the liquid crystal layer by driving the liquid crystal molecules, thereby displaying information. According to the liquid crystal display manufacturing method, a driving device is formed on a glass having a predetermined size to manufacture a substrate, and a color filter layer is formed on another glass to manufacture another substrate. Further, the sealant is applied to any of the two substrates in a predetermined pattern, and the liquid crystal droplets are dropped in the area of the sealant-restricted area in a dot form, and the two substrates are bonded to each other. When the two substrates are bonded to each other, the liquid crystal droplet pattern forms two liquid crystal layers of the base region. A mother glass made by mailing two substrates in the field to manufacture a unit liquid crystal surface root constituting a liquid crystal display. The g manufacturing method is performed by sequentially arranging various manufacturing device manufacturing lines having individual functions. In many manufacturing apparatus, the coating machine performs a procedure of dropping liquid crystals and a procedure of discharging the sealant. The procedure for dropping crystals will be described in detail with reference to FIG. ® 1 is a perspective view of the display-like coating 201120538 2. First, the substrate on which the liquid crystal is to be dropped is placed on the stage 300 of the f 2 frame 200. When the head unit 400 is pre-emptive
三、移動於平台300上方時，液晶自頭單元400之喷嘴N 滴落。為了使液晶自喷嘴N自由掉落，重量需要約lmg至 3mg。同時，頭單元4〇〇沿安裝於框架200上方之頭支撐 件500移動。頭支撐件500的兩端彎曲並耦接框架2〇〇， 而移動於一個方向。於此，頭支撐件5〇〇橫向放置於平台 300上方。平台3〇〇在裝設於框架2〇〇之固定桌6〇〇上移 動於一個方向。平台300移動於垂直於頭支撐件5〇〇之方 向。同時，液晶塗佈機可更包含重量量測單元7〇〇，以量 測液晶的重量。 於上述液晶塗佈機結構中，為了使液晶自喷嘴N自由 掉落，重量約需要111^至311^。構成母玻璃的兩個基板間 的間隔是非常小的，約微米等級，而填充在兩基板間之液 晶的厚度也是非常小的約在微米等級。 因此’一般自喷嘴N排出lmg至3mg液晶的液晶塗 佈機中’液晶實際滴落的區域以及滴落的液晶回流的區域 間發生厚度差異。液晶層的厚度差異使得穿過液晶層的光 路徑不同’導致產品螢幕上發生有點，而造成缺陷產品。 【發明内容】 因此，本發明有鑑於上述先前技術發生的問題，本發明 之一目的在於提供控制液晶滴落的裝置，意欲從喷嘴滴落最 少量的液晶到基板’而最小化點的發生。 為了達成上述目的，本發明提供一種控制液晶滴落的裝 I S] 5 201120538 f包含·頭單元，於其中具有供氣路經及液晶供應路徑， 透過液晶供應路徑供應的液晶透過噴嘴滴落，以及形成於喷 ^之端部的液晶滴藉由透過供氣路#供應的氣體滴落到基 上、液晶暫存單元’自液晶儲存容II抽吸液晶，並暫時儲 2液晶、以及雙流體控制單元，控儀液晶暫存單元供應到 嘴嘴之端部驗晶量’以及調節料滴落在喷嘴之端部形成 的液晶滴之獻艚。 雙流體控制單70可包含：液晶饋送速率浦部，用於控 制供應到液晶供應路;^之液晶饋送速率；以及氣體控制部， 定位於氣槽及供氣路徑之間，以控制調氣閥。 雙流體控制單元及/或液晶饋送速率控制部僅供應 ^Img至〇.8mg料量液晶到頭單元中界定的液晶供應路 仅以及藉由透過供氣路徑供應的氣體喷射壓力，將此小量 的液晶滴落到顯示面板。 【實施方式】 於後，參考伴隨圖式將詳細說明本發明較佳實施例。 一根據本發明實施例控制液晶滴落之裝置主要包含頭單 兀、液a::暫存單元、以及雙流體控解元。將參考伴隨圖式 說明頭單7G及可由雙流體控制單元驅動之液晶暫存單元之 機械架構與操作。圖2及圖3為顯示根據本發明實施例控制 液晶滴落之裝置之機械組態之示意圖。 如圖2及圖3所示，頭單元127〇具有供氣路徑125〇及 液晶供應路徑1260於其中。透過液晶供應路徑㈣供應的 Γ S] 201120538 液晶透過喷嘴滴落於基板。於此，藉由來自供氣路徑125〇 的氣壓將液晶滴落到基板上。界定於頭單元1270中的供氣 路徑1250經由供氣官線連接到氣槽1255，且調氣閥8〇〇安 裝於供氣管線上，而調節要供應到頭單元127〇的氣量。界 定於頭單元1270中的液晶供應路徑連接到液晶暫存單 ，1290的液晶出口 1230，將於下詳述。如此一來，具有供 氣路徑1250與液晶供應路徑126〇於其中的頭單元127〇， 石著女裝於如圖1所示之液晶塗佈機之框架2⑻上方之頭支 撐件500移動，因而滴落液晶到基板上。 同時’液晶暫存單元㈣自液晶儲存容器漏抽吸液 晶並暫時儲存液晶，而將暫時儲存的液晶供應到頭單元 1270。於-範例中，如圖2及圖3所示，液晶暫存單元㈣ 可具有筒件組件的結構，其巾活塞料部·於果送孔中 可上/下移動或轉動。液晶人口 122G及液晶出口 123〇形成 =晶暫存單元㈣，而與活塞泉送部咖插入的果送孔 。^入口 1220架構成藉由管子連接到液晶儲存容器 似D 123”_連接_單元127G中的液晶 者’切除活塞栗送部_的部分外圍， 通曰Γ σΡ 1240 ’因而容許液晶進出。切除部1240面對 液日日入口 1220或液晶出口 1230。 1290 而使活塞泵送部 1220。於此狀態 首先，如圖2所示，活塞1100旋轉， 1280的切除部124G面對筒件的液晶入口 201120538 :，以下參考圖4說明的雙流體控制單元9〇〇控制活塞驅動 部’而向上移動活塞n〇〇。當活塞1100向上移動時，形成 在活塞泵送部1280的端面與泵送孔之間的液晶抽吸空間增 加，且因為液晶抽吸空間的内外壓差，而透過液晶入口 122〇 讓液晶儲存容器12〇〇所含的液晶121〇饋送到液晶抽吸空 間0 工· μ接著，雙流體控制單元900再次控制活塞驅動部，因而 ，轉'舌塞1100 ’使得活塞泵送部1280的切除部1240面對 筒件的液晶出口 123〇,如圖3所示。接著，雙流體控制單 几900執行控制，而使之前向上移動的活塞n⑻向下移動。 因此’液晶抽吸空間逐漸減少，而使此空間中填充的液晶透 過液晶出口 1230饋送到頭單元1270。 雙流體控制單元900中，透過液晶暫存單元129〇自 ί儲存Ϊ器12〇0供應液晶到頭單元1270以及利用氣體使供 μ到頭單元1270的液晶滴落之操作與周邊元件將參^ 4至圖6Α及圖6Β詳細說明。 θ 圖4為顯示根據本發明實施例控制液晶滴落之裝 方塊圖；以及圖5八至圖SC及圖6Α與圖6 根 發明實施例控制液晶滴落之裝置之控制程序的二圖根據本 於圖4中，調氣閥_利用於下詳述之雙流體控 900或可由兩部分構成之雙流體控解元9() 920來控制閥開π比例，而調節供應到頭單元 雙流體控制單元_控制自液晶暫存單元聊供應到 201120538 圖2之液晶供應路徑126〇之液晶量，並調節氣體，而藉由 供應到供氣路徑1250的氣體，使供應到液晶供應路徑1260 之液晶滴落到基板(其可為顯示面板)上。 此類雙流體控制單元900可實施成一個處理器或具有 液晶饋送率控制部910與氣體控制部920之雙結構^液晶饋 送率控制部910控制欲供應到液晶供應路徑126〇之液晶 量，而氣體控制部920控制欲供應到供氣路徑125〇之氣量。 圖4之活塞驅動部1〇〇〇包含線性驅動單元與旋轉驅動單 元，以上/下移動與左/右旋轉活塞1100(其為液晶暫存單元 1290在泵送孔中的一個元件），以及由液晶饋送率控制部91〇 所控制。 於後’參考圖5及圖6,將詳細說明利用雙流體控制單 元900滴落液晶的五種方法。雙流體控制單元9〇〇可實施成 具有液晶饋送率控制部910與氣體控制部920之雙結構。因 此，不需要特別的改變，液晶饋送率控制部91〇與氣體控制 部920收發預定訊號(例如通知已供應指定量液晶或氣體之 訊號）’並操作於微小的時間間隔，而達到與雙流體控制單 兀900相同的液晶滴落效應。以下將說明利用雙流體控制 元900控制液晶滴落的方法。 (1)控制液晶滴落之方法 首先，參考圓2所述之方法，雙流體控制單元9〇〇控 =塞驅動部麵，而使航量液晶⑼㈣)儲存於液晶暫存 單元1290。再者，再次控制活塞驅動部1000，以旋轉活夷 11〇〇,而使液晶出口 1230面對活塞泵送部謂之切除： 201120538 1240,如圖3所示。接著，雙流體控制單元9⑻向下移動先 則向上移的活塞1100,而使預設量液晶透過液晶出口 123〇 及液晶供應路徑1260供應到喷嘴端部。圖5A為顯示需要 向下移動活塞1100而使預設量液晶供應到喷嘴端部之活塞 驅動時間的時關。於此，「預設量液晶」為當液晶滴落區 域與液晶回流區域間之厚度差異最小時之液晶量，且根據實 驗較佳範圍為O.lmg至〇.8mg。 若液晶暫存單元1290的活塞11〇〇向下驅動了圖5A之 ，間T卜而使預設量液晶供應到喷嘴端部，則雙流體控制 f 7L 9GG纽驅騎塞議。祕供制倾端部之液晶 夏不足以使其自由掉落，所赌晶並未滴落到基板而是形成 flf滴於倾端部。同時，雙流體控解元控制調氣閥 二而在經過圖5A之時間T1後，於時間τ2使氣體供應 ，兀1270之供氣路徑125〇。如此一來若於時間η 127G，則供應到噴嘴端部之液晶藉由氣 f 洛到基板。過了時間T2後，頭單元127〇移動到下 雙流體控制單元_向下雜絲議，而於 體’而使得供應到嘴嘴端部之小量液晶最終到:反 接著3預供應職錄㈣喷嘴後 η 方法(ΤΚΤ2、Τ3·Τ4、Τ5-Τ6)，分別 ί美板ί預定=_及調氣閥_，而相繼滴落小量液晶 因此，最小化了液晶滴落區域及液晶回 異，因而降低由於贿液晶造成點導致的 201120538 (2)控制液晶滴落之方法 控制液晶滴落之另一方法中，雙流體控制單元9 〇 〇可重 複地執行控制，以同時供應預設量液晶(0.lmg至〇 8mg)及 氣體到頭單元1270，如圖5B所示。亦即，如圖3所示，在 雙流體控制單元900旋轉活塞而使液晶出口〗23〇面對活塞 泵送部1280之切除部1240的狀態下，活塞1100向下移動 而使預設量液晶供應到喷嘴端部。假設活塞驅動時間如圖 5B所示為Ή，雙流體控制單元9〇〇控制調氣閥8〇〇，而於 時間T1使氣體供應到頭單元1270之供氣路徑1250。 若於時間Τ1供應氣體到頭單元1270，則在此時間供應 到喷嘴端部並形錢晶滴之液晶，最、终藉由氣壓滴落到 ，。再者，在過了時間叫麦，頭單元127〇移動到下一個滴 洛點，以及雙流體控制單元9〇〇向下移動活塞_，而於 量液晶供應到喷嘴以及同時供應氣體。此 饋送到喷嘴端部之液晶於時間丁2也藉由氣_ 板0 當重複以程序滴落液日日日到基 最-，一:= (3)控制液晶滴落之方法 如圖5C所不，於控制液晶滴落的 控制單元_執行控制，而 ^中’雙^體 以及於時間T1供庫、^…應軋體到碩單元127〇, 應虱體犄，週期性地(Τ2、丁3、及Τ4)供應 201120538 預设1液晶(O.lmg至0.8mg)。 亦即，如圖3所示，在活塞1100旋轉而使液晶出口 1230 面對活塞泵送部1280之切除部1240之狀態下，雙流體控制 單元900控至調氣閥8〇〇，而供應氣體到頭單元127〇。於時 間T1供應氣體時，雙流體控制單元900向下移動活塞 1100 ’而於時間T2使預設量液晶(O.lmg至〇.8mg)供應到喷 嘴端部，如圖5C所示。當活塞11〇〇向下移動時，液晶逐漸 供應到頭單元127〇之喷嘴端部並形成液晶滴，以及液晶藉 由氣壓最終滴落到基板。經過時間T2後，頭單元1270移動 到下一個滴落點，而雙流體控制單元9〇〇向下移動活塞 1100 ’而於時間T3使預設量液晶供應到喷嘴。此時，於時 間T3饋送到喷嘴端部的液晶也藉由氣壓滴落到基板。 當重複上述步驟滴落液晶到基板時，最小化了液晶滴落 區域與液晶回流區域間的厚度差異，而降低因滴落液晶造成 的點而發生的缺陷比例。 (4)控制液晶滴落之方法 如圖6A所示，於控制液晶滴落的又另一方法，當液晶 持續地供應到頭單元1270之噴嘴時，雙流體控制單元9〇〇 重複地控制(T2、T3、及T4)氣體的供應，而週期地供應預 設量液晶(0.111^至〇.811^)。 亦即’如圖3所示，在活塞ι100旋轉而使液晶出口 123〇 面對活塞泵送部1280之切除部1240之狀態下，雙流體控制 單元900於圖6A之時間T1向下移動活塞11〇〇，因而持續 ΐ S] 12 201120538 _ ” w、’文日日到頭單兀1270。於時間Tl液晶持續供應到頭單 7G 12;7(^之喷嘴時’雙流體控制單元_测調氣闕_而 於預《•又量液aa(G.img至〇 8mg)可自噴嘴滴落之時間丁2、 T3或T4供應氣體。根據此類方法，於時間T1液晶逐漸 嘴端部。再者’於預設量液晶(0.lmg至〇.8mg)聚 二日县攸端，之時間T2、T2、或T3供應的氣壓，使預設量 、之Β曰、'滴落到基板。頭單元1270在Τ2盥Τ3以及Τ3與 Τ4間的時間間隔移動。 ’ 、 例 本方法類似於上述方法也可降低由於點造成的缺陷比 (5)控制液晶滴落之方法 如圖6Β所示，於控制液晶滴落的又另一方法，於時間 Τ1持續供應液晶到頭單元m〇之嘴嘴時，雙流體控制單元 900可供應氣體’而滴落預設量液晶⑴㈣至❽㈣。 亦即，如圖3所示’在活塞11〇〇旋轉而使液晶出口 123〇 ，對活塞錢部128G之切除部丨之狀態下，雙流體控制 早兀900於圖6B之時間T1向下移動活塞11〇〇，因而持 供，液晶到頭單元127〇之喷嘴。於時間T1持續供應液晶到 =早το 127G之噴嘴時，雙流體控解元控制調氣闊 ⑻，而使預設量液晶(0.lmg至0 8mg)自喷嘴滴落。透過此 類方法\於時間T1液晶逐漸供制㈣端部並形成液晶 滴，以及藉由與液晶-起供應的氣壓使預設量液晶最故滴g _為預設量液日$可自噴嘴端部落 的壓力。 201120538 〜ΐ重複上述步驟滴落液晶職板時，最小化了液晶滴落 =广液晶回流區域間的厚度差異，因而降低由於滴落液晶 造成點導致的缺陷比例。 如上所述’本發明提供控制液晶滴落的裝置，其中藉由 雙机體控鮮7〇或液晶饋送速率控制部，使小量的液晶 (二mg至〇.8mg)在頭單^之喷嘴端部形成液晶，，以及藉 由透過供氣路徑供應的氣體噴織力，使液晶滴滴落到顯示 面上。因此，本發明能使小量的液晶以喷塗方式塗佈到顯 ，面板，而使液晶滴落區域與液晶回流區域間的厚度差異 幻化因而降低因滴落液晶造成的點而發生的缺陷比 例。結果，改善了面板的顯示品質。 雖…:已針對例示目的說明本發明較佳實施例，但是熟此 巧藝者應理解在不⑽本發明所时請專職圍之精神與 範嗜下’可有各種修改、添加、及替換。 【圖式簡單說明】 本發明上述及其他的目的、紐、以及優點，結合伴隨 圖式與詳細說明將更易了解，其中： 圖1為顯示一般液晶塗佈機之透視圖； 圖2及圖3為顯示根據本發明實施例控織晶滴落 置之機械組態之示意圖； 展 圖4為顯示根據本發明實施例控制液晶滴落之 方塊圖；以及 〈 圖5A至圖％及圖6八與圖犯為顯示根據本發明實施 201120538 例控制液晶滴落之裝置之控制程序的時間圖。 【主要元件符號說明】 100基板 200框架 300平台 400頭單元 500頭支撐件 600固定桌 700重量量測單元 800調氣閥 900雙流體控制單元 910液晶饋送率控制部 920氣體控制部 1000活塞驅動部 1100活塞 1200液晶儲存容器 1210液晶 1220液晶入口 1230液晶出口 1240切除部 15 201120538 1250供氣路徑 1255氣槽 1260液晶供應路徑 1270頭單元 1280活塞泵送部 1290液晶暫存單元 N喷嘴 163. When moving above the platform 300, the liquid crystal drops from the nozzle N of the head unit 400. In order to freely drop the liquid crystal from the nozzle N, the weight needs to be about 1 mg to 3 mg. At the same time, the head unit 4 is moved along the head support 500 mounted above the frame 200. Both ends of the head support 500 are bent and coupled to the frame 2〇〇, and are moved in one direction. Here, the head support 5 is placed laterally above the platform 300. The platform 3 is moved in one direction on a fixed table 6〇〇 mounted on the frame 2〇〇. The platform 300 is moved in a direction perpendicular to the head support 5〇〇. Meanwhile, the liquid crystal coater may further include a weight measuring unit 7〇〇 to measure the weight of the liquid crystal. In the above liquid crystal coater structure, in order to freely drop the liquid crystal from the nozzle N, the weight needs to be about 111 to 311. The spacing between the two substrates that make up the mother glass is very small, on the order of microns, and the thickness of the liquid crystal filled between the two substrates is also very small, on the order of microns. Therefore, a difference in thickness occurs between the area where the liquid crystal actually drops and the area where the liquid crystal flows back from the liquid crystal applicator which normally discharges 1 mg to 3 mg of liquid crystal from the nozzle N. The difference in thickness of the liquid crystal layer makes the light path through the liquid crystal layer different, causing a bit of occurrence on the product screen, resulting in a defective product. SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the problems of the prior art described above, and it is an object of the present invention to provide a device for controlling liquid crystal dripping, which is intended to drip a minimum amount of liquid crystal from a nozzle to a substrate' to minimize the occurrence of dots. In order to achieve the above object, the present invention provides an apparatus for controlling liquid crystal dripping, in which a head unit is provided with a gas supply path and a liquid crystal supply path through which a liquid crystal is supplied through a liquid crystal supply path, and The liquid crystal droplet formed at the end of the spray is dropped onto the substrate by the gas supplied through the gas supply path #, the liquid crystal temporary storage unit 'sucks the liquid crystal from the liquid crystal storage volume II, and temporarily stores the liquid crystal, and the two-fluid control The unit, the liquid crystal temporary storage unit of the controller is supplied to the end of the nozzle to inspect the crystal amount, and the liquid crystal droplet formed by the adjustment material drop at the end of the nozzle. The two-fluid control unit 70 may include a liquid crystal feed rate pump for controlling the liquid crystal feed rate supplied to the liquid crystal supply path, and a gas control portion positioned between the gas tank and the gas supply path to control the gas regulating valve. The two-fluid control unit and/or the liquid crystal feed rate control unit supplies only the liquid crystal supply path defined in the liquid crystal to the head unit and the gas injection pressure supplied through the gas supply path, and the small amount is supplied. The liquid crystal drops onto the display panel. [Embodiment] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. A device for controlling liquid crystal dripping according to an embodiment of the present invention mainly comprises a head unit, a liquid a:: a temporary storage unit, and a two-fluid control unit. The mechanical architecture and operation of the headgear 7G and the liquid crystal temporary storage unit that can be driven by the two-fluid control unit will be described with reference to the accompanying drawings. 2 and 3 are schematic views showing the mechanical configuration of a device for controlling liquid crystal dropping according to an embodiment of the present invention. As shown in Figs. 2 and 3, the head unit 127A has a gas supply path 125A and a liquid crystal supply path 1260 therein.供应 S] 201120538 The liquid crystal is supplied through the nozzle through the liquid crystal supply path (4). Here, the liquid crystal is dropped onto the substrate by the air pressure from the gas supply path 125A. The air supply path 1250 defined in the head unit 1270 is connected to the air tank 1255 via the air supply official line, and the air conditioning valve 8 is mounted on the air supply line to regulate the amount of air to be supplied to the head unit 127. The liquid crystal supply path defined in the head unit 1270 is connected to the liquid crystal temporary storage unit 1230 of the liquid crystal temporary storage unit 1290, which will be described in detail below. As a result, the head unit 127 is provided with the air supply path 1250 and the liquid crystal supply path 126, and the head support member 500 is moved over the frame 2 (8) of the liquid crystal coater shown in FIG. Drop the liquid crystal onto the substrate. At the same time, the liquid crystal temporary storage unit (4) leaks the liquid crystal from the liquid crystal storage container and temporarily stores the liquid crystal, and supplies the temporarily stored liquid crystal to the head unit 1270. In the example, as shown in Fig. 2 and Fig. 3, the liquid crystal temporary storage unit (4) may have a structure of a cylindrical member, and the towel piston portion may be moved up or down in the fruit feed hole. The liquid crystal population 122G and the liquid crystal outlet 123〇 form = crystal temporary storage unit (4), and the fruit delivery hole inserted into the piston spring delivery part coffee. ^ The inlet 1220 frame constitutes a portion of the periphery of the liquid crystal storage container which is connected to the liquid crystal storage container by D 123"_connection_unit 127G, and cuts off the peripheral portion of the piston pumping portion _, which allows the liquid crystal to enter and exit. 1240 faces the liquid daily inlet 1220 or the liquid crystal outlet 1230. The piston pumping portion 1220 is turned on. In this state, first, as shown in FIG. 2, the piston 1100 rotates, and the cut portion 124G of 1280 faces the liquid crystal inlet of the cylinder member 201120538 The two-fluid control unit 9 described below with reference to Fig. 4 controls the piston driving portion to move the piston n〇〇 upward. When the piston 1100 moves upward, it is formed between the end surface of the piston pumping portion 1280 and the pumping hole. The liquid crystal suction space is increased, and because of the internal and external pressure difference of the liquid crystal suction space, the liquid crystal 121 〇 contained in the liquid crystal storage container 12 is fed through the liquid crystal inlet 122 to the liquid crystal suction space. The fluid control unit 900 again controls the piston driving portion, and thus, the 'tongue plug 1100' is turned so that the cut-away portion 1240 of the piston pumping portion 1280 faces the liquid crystal outlet 123 of the cylindrical member, as shown in Fig. 3. Then, The fluid control unit 900 performs control while moving the previously moved upward piston n (8) downward. Thus, the liquid crystal suction space is gradually reduced, and the liquid crystal filled in this space is fed through the liquid crystal outlet 1230 to the head unit 1270. Two-fluid control In the unit 900, the liquid crystal to the head unit 1270 is supplied from the Ϊ storage unit 12〇0 through the liquid crystal temporary storage unit 129, and the operation of the liquid crystal for the μ to the head unit 1270 is dropped by the gas and the peripheral elements are connected to the figure. 6A and FIG. 6A are detailed. θ FIG. 4 is a block diagram showing the control of liquid crystal dropping according to an embodiment of the present invention; and FIG. 5 to FIG. SC and FIG. 6A and FIG. The second diagram of the control program is adjusted according to the present invention, in which the valve is controlled by a two-fluid control 900 as described in the following or a two-fluid control unit 9 () 920 composed of two parts to control the valve opening π ratio. The supply-to-head unit two-fluid control unit_controls the liquid crystal supply from the liquid crystal temporary storage unit to the 201120538 liquid crystal supply path 126, and adjusts the gas, and the gas supplied to the gas supply path 1250 is made. The liquid crystal supplied to the liquid crystal supply path 1260 drops onto the substrate (which may be a display panel). Such a two-fluid control unit 900 may be implemented as one processor or have a dual structure of the liquid crystal feed rate control portion 910 and the gas control portion 920. The liquid crystal feed rate control section 910 controls the amount of liquid crystal to be supplied to the liquid crystal supply path 126, and the gas control section 920 controls the amount of gas to be supplied to the supply path 125. The piston drive section 1 of Fig. 4 includes a linear drive The unit and the rotary drive unit are moved up/down and the left/right rotary piston 1100 which is one of the liquid crystal temporary storage units 1290 in the pumping hole, and is controlled by the liquid crystal feed rate control unit 91A. Referring to Figures 5 and 6, five methods of dropping liquid crystal using the two-fluid control unit 900 will be described in detail. The two-fluid control unit 9A can be implemented to have a double structure of the liquid crystal feed rate control unit 910 and the gas control unit 920. Therefore, the liquid crystal feed rate control unit 91 transmits and receives a predetermined signal (for example, notifying that a specified amount of liquid crystal or gas has been supplied) to the gas control unit 920 and operates at a minute time interval to reach the two-fluid. The same liquid crystal dripping effect of the single turn 900 is controlled. A method of controlling liquid crystal dripping using the two-fluid control unit 900 will be described below. (1) Method of controlling liquid crystal dripping First, referring to the method described in the circle 2, the two-fluid control unit 9 controls the plug drive surface, and the air flow liquid crystal (9) (four) is stored in the liquid crystal temporary storage unit 1290. Further, the piston driving portion 1000 is again controlled to rotate the movable portion, so that the liquid crystal outlet 1230 faces the piston pumping portion, which is referred to as: 201120538 1240, as shown in FIG. Next, the two-fluid control unit 9 (8) moves the piston 1100 which is moved upward first, and supplies a predetermined amount of liquid crystal to the nozzle end through the liquid crystal outlet 123 〇 and the liquid crystal supply path 1260. Fig. 5A is a timing diagram showing the piston driving time required to move the piston 1100 downward to supply a predetermined amount of liquid crystal to the nozzle end. Here, the "predetermined amount of liquid crystal" is the amount of liquid crystal when the difference in thickness between the liquid crystal dropping region and the liquid crystal reflowing region is the smallest, and is preferably in the range of 0.1 mg to 〇8 mg according to an experiment. If the piston 11 of the liquid crystal temporary storage unit 1290 drives the lower portion of FIG. 5A to supply a predetermined amount of liquid crystal to the nozzle end, the two-fluid control f 7L 9GG is driven. The liquid crystal of the tipping system is not enough for summer to fall freely. The gambling crystal does not drip onto the substrate but forms flf on the tip end. At the same time, the two-fluid control unit controls the air-conditioning valve. After the time T1 of FIG. 5A, the gas is supplied at time τ2, and the gas supply path 125 of the 兀1270 is 〇. Thus, if the time η 127G, the liquid crystal supplied to the end of the nozzle is cooled to the substrate by the gas. After the time T2, the head unit 127 〇 moves to the lower two-fluid control unit _ downward, and the body 's small amount of liquid crystal supplied to the mouth end is finally: back to 3 pre-supply (4) After the nozzle η method (ΤΚΤ2, Τ3·Τ4, Τ5-Τ6), respectively, ί美板 ί predetermined =_ and air conditioning valve _, and successively drip a small amount of liquid crystal, thus minimizing the liquid crystal dropping area and liquid crystal back In another method of controlling liquid crystal dropping by the method of controlling liquid crystal dropping by the method of controlling liquid crystal dropping, the two-fluid control unit 9 can repeatedly perform control to supply the preset amount at the same time. Liquid crystal (0.1 mg to 〇8 mg) and gas to head unit 1270 are shown in Figure 5B. That is, as shown in FIG. 3, in a state where the two-fluid control unit 900 rotates the piston so that the liquid crystal outlet 23 〇 faces the cut-away portion 1240 of the piston pumping portion 1280, the piston 1100 moves downward to make a preset amount of liquid crystal. Supply to the end of the nozzle. Assuming that the piston driving time is Ή as shown in Fig. 5B, the two-fluid control unit 9 〇〇 controls the modulating valve 8 〇〇, and supplies the gas to the supply path 1250 of the head unit 1270 at time T1. If the gas is supplied to the head unit 1270 at time ,1, the liquid crystal which is supplied to the end of the nozzle and shaped into a droplet at this time is finally dropped by the air pressure. Further, after the elapse of time, the head unit 127 〇 moves to the next drip point, and the two-fluid control unit 9 〇〇 moves the piston _ downward, and the liquid crystal is supplied to the nozzle and simultaneously supplies the gas. The liquid crystal fed to the end of the nozzle is also controlled by the gas_plate 0. The method of controlling the liquid crystal dripping by repeating the program dripping liquid to the base day-to-base is as shown in Fig. 5C. No, in the control unit to control the liquid crystal dripping _ execution control, and ^ in the 'double body and at time T1 for the library, ^ ... should be rolled to the unit 127 〇, should be 虱 犄, periodically (Τ 2 Ding 3, and Τ 4) supply 201120538 preset 1 liquid crystal (O.lmg to 0.8mg). That is, as shown in FIG. 3, in a state where the piston 1100 is rotated to bring the liquid crystal outlet 1230 to face the cut-away portion 1240 of the piston pumping portion 1280, the two-fluid control unit 900 is controlled to the air-conditioning valve 8A, and the gas is supplied. To the head unit 127〇. When the gas is supplied at time T1, the two-fluid control unit 900 moves the piston 1100' downward and supplies a predetermined amount of liquid crystal (0.1 mg to 8.8 mg) to the nozzle end at time T2 as shown in Fig. 5C. When the piston 11 turns downward, the liquid crystal is gradually supplied to the nozzle end of the head unit 127 and forms a liquid crystal droplet, and the liquid crystal is finally dropped onto the substrate by the air pressure. After the elapse of time T2, the head unit 1270 moves to the next drop point, and the two-fluid control unit 9 turns the piston 1100' downward and supplies the preset amount of liquid crystal to the nozzle at time T3. At this time, the liquid crystal fed to the end of the nozzle at time T3 is also dropped onto the substrate by air pressure. When the above steps are repeated to drop the liquid crystal to the substrate, the difference in thickness between the liquid crystal dropping region and the liquid crystal reflow region is minimized, and the proportion of defects occurring due to dropping of dots by the liquid crystal is reduced. (4) Method of Controlling Liquid Crystal Dropping As shown in Fig. 6A, in another method of controlling liquid crystal dropping, when the liquid crystal is continuously supplied to the nozzle of the head unit 1270, the two-fluid control unit 9 is repeatedly controlled ( The supply of T2, T3, and T4) gas is periodically supplied with a predetermined amount of liquid crystal (0.111^ to 811.811^). That is, as shown in FIG. 3, in a state where the piston ι100 is rotated to cause the liquid crystal outlet 123 to face the cut-away portion 1240 of the piston pumping portion 1280, the two-fluid control unit 900 moves the piston 11 downward at time T1 of FIG. 6A. 〇〇 因而 因而 ] ] ] ] 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 2011 The gas is supplied to the gas at a time T2, T3 or T4 at which the liquid AA (G.img to 〇8 mg) can drip from the nozzle. According to such a method, the liquid crystal is gradually at the end of the mouth at time T1. Furthermore, 'the preset amount of liquid crystal (0.lmg to 〇.8mg) gathers at the end of the second day of the county, and the pressure supplied by the time T2, T2, or T3 causes the preset amount, Β曰, 'drop to the substrate The head unit 1270 moves at intervals of Τ2盥Τ3 and Τ3 and Τ4. ' , The method is similar to the above method, and the defect ratio due to the point can also be reduced. (5) The method of controlling the liquid crystal drop is as shown in FIG. In another method for controlling liquid crystal dripping, when the liquid crystal is continuously supplied to the mouth of the head unit m〇 at time ,1, the two-fluid control The unit 900 can supply the gas 'and drop the preset amount of liquid crystals (1) (4) to ❽ (4). That is, as shown in FIG. 3, 'the state of the piston 11 turns and the liquid crystal outlet 123 〇, the state of the cut-off portion of the piston portion 128G Next, the two-fluid control early 900 moves the piston 11〇〇 downward at the time T1 of FIG. 6B, thereby holding the liquid crystal to the nozzle of the head unit 127. When the liquid crystal is continuously supplied to the nozzle of the early το 127G at time T1, The two-fluid control solution controls the gas adjustment width (8), and causes the preset amount of liquid crystal (0.1 mg to 0.8 mg) to drip from the nozzle. Through such a method, the liquid crystal droplets are gradually supplied at the end of the liquid crystal at time T1. And by using the air pressure supplied from the liquid crystal to make the preset amount of liquid crystal drop g _ for the preset amount of liquid day $ can be from the pressure of the nozzle end tribe. 201120538 ~ ΐ repeat the above steps to drip the LCD job board, minimize Liquid crystal drop = thickness difference between wide liquid crystal reflow regions, thus reducing the proportion of defects caused by dropping liquid crystal dots. As described above, the present invention provides a device for controlling liquid crystal dripping, in which a double body is controlled. 〇 or LCD feed rate control, A small amount of liquid crystal (two mg to 8.8 mg) forms liquid crystal at the end of the nozzle of the head unit, and the liquid crystal droplets are dropped onto the display surface by the gas supply force supplied through the gas supply path. The invention enables a small amount of liquid crystal to be applied to the display panel by spraying, and the thickness difference between the liquid crystal dropping region and the liquid crystal reflow region is changed to thereby reduce the defect ratio which occurs due to dropping the dots caused by the liquid crystal. The display quality of the panel is improved. Although: the preferred embodiment of the present invention has been described for the purpose of illustration, it should be understood that those skilled in the art should understand that the spirit of the full-time division and the Various modifications, additions, and replacements. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, advantages, and advantages of the present invention will become more apparent from the accompanying drawings and the detailed description, wherein: FIG. 1 is a perspective view showing a general liquid crystal coating machine; FIG. 2 and FIG. FIG. 4 is a block diagram showing the control of liquid crystal drop according to an embodiment of the present invention; and FIG. 5A and FIG. The figure is a time chart showing the control procedure of the apparatus for controlling liquid crystal dripping according to the 201120538 embodiment according to the present invention. [Main component symbol description] 100 substrate 200 frame 300 platform 400 head unit 500 head support 600 fixed table 700 weight measuring unit 800 air conditioning valve 900 dual fluid control unit 910 liquid crystal feed rate control unit 920 gas control unit 1000 piston drive unit 1100 piston 1200 liquid crystal storage container 1210 liquid crystal 1220 liquid crystal inlet 1230 liquid crystal outlet 1240 cutting part 15 201120538 1250 gas supply path 1255 gas tank 1260 liquid crystal supply path 1270 head unit 1280 piston pumping part 1290 liquid crystal temporary storage unit N nozzle 16