201236765 六、發明說明： 【發明所屬之技術領域】 本發明關於裝設到液晶塗佈機之喷嘴，用於在製造液 晶顯示器製程期間塗佈液晶到玻璃面板。 【先前技術】 液晶塗佈機為在製造平面板顯示器(例如液晶顯示器 (LCD顯示器))之程序期間，塗佈液晶滴到玻璃面板之裝置。 圖1為顯示典型液晶塗佈機架構之透視圖。圖2為提 供於液晶塗佈機中之傳統喷嘴之縱向截面圖。圖3為顯示 形成於不具有防止液晶散佈構件之傳統喷嘴尖端之前端之 液晶形狀之圖式。圖4為顯示形成於具有防止液晶散佈構 件之傳統喷嘴尖端之前端之液晶形狀之圖式。 於後，參考圖1說明習知液晶塗佈機之主要架構。 液晶塗佈機包含框架100、托台110、塗佈頭單元支稽 框架130、以及複數塗佈頭單元14卜托台11〇提供於框^ 100之^表面，以支稽'玻璃面板S於其上。塗佈頭單元支 撐框架130具有門架形狀，並可移動地支撐於框架1〇〇上。 塗佈頭單元140藉由塗佈頭單元支撐框架13〇可移動地支 撐。各塗佈頭單元140包含喷嘴200。塗佈頭單元14〇移 動於相關於玻璃面板S之X及Y軸方向，並從噴嘴2〇〇塗 佈液晶滴到玻璃面板S。 參考圖2，喷嘴200包含喷嘴本體21〇及耦接噴嘴本 201236765 體210之噴嘴尖端220。 喷嘴本體210為延伸預定長度之中空管。具有預定直 徑之流道211縱向地形成穿過喷嘴本體21〇。噴嘴本體21〇 之流道211之直徑在喷嘴本體21〇之縱長方向為固定的。 喷嘴尖端220具有預定長度以及其外徑等於喷嘴本體 210之流道211之直徑。流道223縱向地形成穿過喷嘴尖 端220»再者’防止液晶散佈構件230提供於喷嘴尖端220 之周圍外表面的周圍《部分的喷嘴尖端220插入喷嘴本體 210之流道21卜使得喷嘴本體21〇之流道211與噴嘴尖端 220之流道223相通。流過喷嘴本體21〇之流道211的液 晶從流道223之入口 224進入喷嘴尖端220之流道223， 然後從喷嘴尖端220透過其出口 225滴落。 喷嘴尖端220之流道223之直徑從入口 224到出口 225 縮減。因此，喷嘴尖端220之流道223 —般具有漸細形狀。 喷嘴尖端220之流道223的漸細形狀，使其可平順地供應 液晶到相對較寬的入口 224。進一步，小量的液晶可從出 口 225滴落。 從喷嘴尖端220排出液晶滴時，所排出的一些液晶滴 離開喷嘴尖端220並滴落到玻璃面板，而其餘的液晶滴則 殘留在喷嘴尖端220之前端並未離開喷嘴尖端220。殘留 在喷嘴尖端220之液晶從喷嘴尖端220之前端懸垂成液晶 形狀。如此稱為潤濕現象。 防止液晶散佈構件230提供於喷嘴尖端220之周園外 201236765 表面的周圍，以防止殘留於噴嘴 喷嘴尖端220的液晶滴沿著端而未離開 表面時的角度。金屬或陶宪(其面碰到固體 材料)典型具有低接觸角。因此，喷嘴尖端22〇的 端22。的表面’而散佈到表面上。==晶;= 端220不具有防止液晶散佈 圍所不，右喷嘴尖 2—的液晶滴C ==端：成於愉端 向上散佈開。因此，由具有===:表面 液晶散佈構件230，提供於喷嘴尖端22Q 2 = ^防止 周圍，防止液晶沿著喷嘴尖端22 ^圍外表面的 如圓4路端之周圍外表面散佈開。 如圖4所不，在提供防止液晶散佈構件23〇於喷嘴 〇 二液晶c僅形成為液滴形狀，而防止 &者喷嘴尖端220之周圍外表面散佈開。 同時’當喷端22G之前端發生_、現象時，從喷 嘴尖端22G排出的-些液晶滴會殘留在喷嘴尖端22〇之 端並未離開喷嘴尖端22〇。因此，實際滴落到玻璃面板上 的液晶量少於從喷嘴尖端220所排出的液晶量。再者，於 利用喷嘴尖端220塗佈液晶到玻璃面板的程序中，殘留在 噴嘴尖端22G之前端驗晶可能會立刻與後續的液晶滴一 起滴落到玻璃面板。因此’當殘留於嘴嘴尖端22〇之前端 並未離開之液晶C的量增加時，變得很難使從噜 排出到玻璃面板之液晶滴的量維持固定。 【發明内容】 為了要從喷嘴尖端塗佈符合使用者預設標準之精確液 晶量，必須最小化塗佈液晶滴到玻璃面板後殘留在喷嘴尖 201236765 端之前端而未離開的液晶量。於此，殘 晶量與喷嘴尖端之前端的圓周界定的 面積稱為「前端_」’其為表示由喷嘴尖周: ^圍之部分的整個面積，並包含喷嘴錢之出口面積)。換 言之’喷嘴尖端之前端©積增加時，殘留 加。因此，為了降低殘留在喷 端的液需要-種結構’其可最小化 積而不改變喷嘴尖端之流道結構，亦即不改變;嘴= 流道的入口或出口的直徑。 ，而，f知喷鈔端具有雜的外獅狀，以利於組 裝程序及機械加工程序。此外，因树嘴尖端之流道之入 二的直徑大於出Π的直徑，所以喷嘴尖端之前端面積是依 據入口之直徑*定”料’於圓柱形喷嘴尖端中，喷嘴尖 端之前端的直徑不能小於喷嘴尖端之人σ的直徑。因此， 習知具有雜雜之噴嘴尖端的前端面齡不改變喷嘴尖 端之流道結構下能降低多少是有極限的。 因此，本發明有馨於先前技術所發生的問題，本發明 之-目的在於提供-封嘴线，其域成_流道具有 與習知喷嘴尖端相同的結構’卻可降低喷嘴尖端之前端面 為達成上述目的，本發明提供一種喷嘴尖端，其耦接 喷嘴本體，以·從噴嘴本體流出之H噴嘴尖端包含 具有預定前端面積之大面積部、小面積部，其前端面積係 小於大面積部之前端面積、流道’形成穿過大面積部與小 面積部，'流道之直徑從入口到出口縮小、以及防止液晶散 201236765 ，2防止從小面積 沿著小面積部之周 佈構件，提供於小面積部之周圍外表面 部排出液晶滴後殘留在小面積部之液晶 圍外表面散佈開。 圓形小面積部可為 止液晶散佈構件可具有管面積部之第—外捏。防 之二防止液晶散佈構件之前端面積可小於大面積部 。喷嘴尖端之本 防止液晶散佈構件可由鐵氟龍所製成 體可由陶瓷所製成。 流道可具有漸細形狀。 【實施方式】 於後，參考伴隨圖式詳細說明本發明實施例。 ，5為根據本發明實施例之噴嘴尖端32〇之透。 圖6為根縣發明實_具料料端⑽之喷嘴_之 1®7 本發明實施例形成於喷嘴尖 之心之液晶形狀之圖式。於以下說明中，「前 一巧表示喷嘴尖端320排出液晶的那一側。 參考圖5及圖6 ’根據本發明實施例之喷嘴尖端32〇 c含大面積部32卜小面積部322、流道333、以及防止液 晶散佈構件330。大面積部321具有預定的前端面積。小 8 201236765 面積部322具有的前端面積係小於大面積部321之前端面 積。流道333形成穿過大面積部321j、H= 且直徑從入口 334到出口 335連續地縮減。防止液晶散佈 構件330提供於小面積部322之周圍外表面的周圍。 於此實施例中，大面積部321及小面積部322各為圓 柱形。大面積部321具有預定的外徑D卜並延伸預定的長 度。小面積部322從大面積部321的前端整體地延伸預定 長度。再者，小面積部322具有外徑D2，係小於大面積部 321的外徑D卜大面_ 321及小面積部322的前端面積 分別表不由大面積部321及小面積部322之前端圓周所包 圍的部分的整個面積。小面積部322之前端面積表示由小 面積部322之刚端圓周所包圍的部分的整個面積並包含 出口 335的面積。於此實施例，大面積部321的前端面積 為ttDI，而小面積部322之前端面積為π〇2。 流道333縱向地形成穿過彼此整合的大面 丨 小面積部322。流道333的入口 334形成於大面積部321 的後端。流道3%之出口 335形成於小面積部322的前端。 入口 334的直徑大於出口 335的直徑，使得流道3幻的直 控從入口 334到出口 335連續地縮減。因此，流道333之 縱向截面具有漸細的形狀。 積部321及小面積部322的直徑及長度可依據一 化’例如入口 334及出口 335的直徑、流道333 ’長又、使用者所需之喷嘴尖端320的截面積大小等。 ^也大面積部321及小面積部322是由不會與流 201236765 過流道333之液晶反應的材料所製成。舉例而言，大面積 部321及小面積部322可由陶瓷所製成。 防止液晶散佈構件330提供於小面積部322之周圍外 表2的周圍’並防止從出口 335排出後殘留在小面積部322 之前端而未離開小面積部322的液晶沿著小面積部322的 周圍外表面散佈開。防止液晶散佈構件33〇較佳由具有高 接觸角且不會與液晶反應的材料所製成。舉例而言，防止 液晶散佈構件330可由鐵氟龍(聚四氟乙烯之商標)所製成。 鐵氟龍具有高接觸角，且不會與液晶反應。因此，提 供=鐵氟龍製成的防止液晶散佈構件33〇到小面積部322 之前端周圍的案例中，可以可靠地防止從小面積部322之 出口 335排出的液晶沿著小面積部322的外表面散佈開。 舉例而言，防止液晶散佈構件33〇可製成圓柱形管的 形狀’並套於小面積部322上。選替地，防止液晶散佈構 件330可包含運用在小面積部322之周圍外表面的薄膜。 在防止液晶散佈構件330製成圓柱形管之形狀的案例中， 防止液晶散佈構件330的外徑D3較佳小於大面積部321 的外徑此職在於當具錢好雜的防止液晶散佈 構件330提供與小面積部322之周圍外表面的周圍時希 望最小化防止液晶散佈構件33〇的前端面積，因為殘留在 喷嘴尖端32〇之前端的液晶量是與防止液晶散佈構件Bo 之前端面積成正比。 如圖7所示，本發_著不_特徵在於，儘管 尖端32〇之流道333具有與習知技術相同的漸細形狀，但 201236765 疋可縮減噴嘴尖端320之前端面積，而降低形成於噴嘴尖 端320之前端的液晶c的量。這樣的效應，可藉由本發明 的結構來實現’其中前端面積小於大面積部321之前端面 積的小面積部322是形成於流道333直徑縮減之前端的周 圍’而不像習知具有線性形狀之喷嘴尖端。 以下說明根據本發明實施例從具有上述架構之喷嘴尖 端滴落液晶的程序。 喷嘴尖端320耦接喷嘴本體310，而使液晶從喷嘴本 體310流入喷嘴尖端32〇。流過喷嘴本體31〇之液晶透過 入口 334進入流道333，然後透過出口 335由喷嘴尖端320 滴出。 同時’如圖5所示’大面積部321及小面積部322典 型為圓柱形’但是需要也可為矩形或六角形。 液晶從喷嘴本體310流入喷嘴尖端320之結構範例 中，如圖6所示，喷嘴尖端320可耦接到具有管子形狀延 伸預定長度之喷嘴本體310。具有預定直徑的流道311縱 向地形成穿過喷嘴本體310。喷嘴本體31〇之流道311的 直徑在喷嘴本體310之縱長方向為固定的。喷嘴尖端32〇 之大面積部321之外徑等於或些微大於喷嘴本體31〇之流 道311的直徑。因此，喷嘴尖端32〇耦接到喷嘴本體31〇， 使得部分的喷嘴尖端320套入喷嘴本體310的流道311。 本發明喷嘴尖端320的應用不限於上述範例。亦即， 喷嘴尖端320可應用於任何類型的喷嘴本體31〇，只要喷 201236765 嘴尖端320可耦接到喷嘴本體310，而使喷嘴本體31〇的 流道3Π與喷嘴尖端320的流道333相通，且從喷嘴本體 310流出的液晶可以從喷嘴尖端32〇之出口 335滴落。 如上所述’於本發明中，可降低從喷嘴尖端滴落液晶 後殘留在喷嘴尖端之前端而未離開喷嘴尖端的液晶量。因 此，可將從喷嘴尖端滴落的液晶量精確地控制在預定範圍 内。再者，每次從喷嘴尖端滴落液晶時，可使從喷嘴尖端 滴落的液晶量保持固定。 雖然針對例示目的說明本伽較佳實補，但是熟此 技藝者當知在轉離如所附申請專利範圍所述之本發明精 神與範訂’可有各種修改、添加、以及替代。 積 【圖式簡單說明】 隨二解特:中以及優點’結合伴 圖1為顯示典型液晶塗佈機架構之透視圖； 截面^為提供㈣1之液岭麵巾之傳_嘴之縱向 嘴尖液晶散佈構件之傳統噴 尖端散佈構件之傳㈣嘴 圖5為根據本發明實施例之噴嘴尖端之透視圖· 圖6為根據本發明實施例具有噴嘴尖端之喷嘴之縱向 201236765 截面圖；以及 圖7為顯示根據本發明實施例形成於喷嘴尖端之前端 之液晶形狀之圖式。 【主要元件符號說明】 100框架 110托台 130塗佈頭單元支撐框架 140塗佈頭單元 200喷嘴 210喷嘴本體 211流道 220喷嘴尖端 223流道 224 入口 225 出口 230防止液晶散佈構件 300喷嘴 310噴嘴本體 311流道 320喷嘴尖端 321大面積部 322小面積部 330防止液晶散佈構件 13 201236765 333流道 334 入口 335 出口 C液晶 S玻璃面板 D1大面積部之外徑 D2小面積部之外徑 D3防止液晶散佈構件之外徑201236765 VI. Description of the Invention: [Technical Field] The present invention relates to a nozzle mounted to a liquid crystal coater for applying liquid crystal to a glass panel during the manufacturing process of the liquid crystal display. [Prior Art] A liquid crystal coater is a device that applies liquid crystal droplets to a glass panel during a process of manufacturing a flat panel display such as a liquid crystal display (LCD display). Figure 1 is a perspective view showing the architecture of a typical liquid crystal coater. Figure 2 is a longitudinal cross-sectional view of a conventional nozzle provided in a liquid crystal coater. Fig. 3 is a view showing the shape of a liquid crystal formed at the front end of a conventional nozzle tip which does not have a liquid crystal scattering preventing member. Fig. 4 is a view showing the shape of a liquid crystal formed at the front end of a conventional nozzle tip having a liquid crystal preventing member. Hereinafter, the main structure of a conventional liquid crystal coater will be described with reference to FIG. The liquid crystal coater comprises a frame 100, a pallet 110, a coating head unit frame 130, and a plurality of coating head units 14 provided on the surface of the frame 100 to support the glass panel S. On it. The coating head unit supporting frame 130 has a gantry shape and is movably supported on the frame 1A. The coating head unit 140 is movably supported by the coating head unit support frame 13''. Each of the coating head units 140 includes a nozzle 200. The coating head unit 14 is moved in the X and Y axis directions with respect to the glass panel S, and the liquid crystal droplets are applied from the nozzle 2 to the glass panel S. Referring to FIG. 2, the nozzle 200 includes a nozzle body 21A and a nozzle tip 220 coupled to the nozzle body 201236765. The nozzle body 210 is a hollow tube extending a predetermined length. A flow path 211 having a predetermined diameter is longitudinally formed through the nozzle body 21A. The diameter of the flow path 211 of the nozzle body 21A is fixed in the longitudinal direction of the nozzle body 21''. The nozzle tip 220 has a predetermined length and an outer diameter thereof equal to the diameter of the flow passage 211 of the nozzle body 210. The flow path 223 is longitudinally formed through the nozzle tip 220. Further, the liquid crystal scattering member 230 is prevented from being provided around the outer surface of the nozzle tip 220. "The partial nozzle tip 220 is inserted into the flow path 21 of the nozzle body 210 so that the nozzle body 21 The channel 211 of the crucible is in communication with the flow path 223 of the nozzle tip 220. The liquid crystal flowing through the flow path 211 of the nozzle body 21 passes from the inlet 224 of the flow path 223 into the flow path 223 of the nozzle tip 220, and then drops from the nozzle tip 220 through its outlet 225. The diameter of the flow passage 223 of the nozzle tip 220 is reduced from the inlet 224 to the outlet 225. Therefore, the flow path 223 of the nozzle tip 220 generally has a tapered shape. The tapered shape of the flow passage 223 of the nozzle tip 220 allows it to smoothly supply the liquid crystal to the relatively wide inlet 224. Further, a small amount of liquid crystal can drip from the outlet 225. When the liquid crystal droplets are discharged from the nozzle tip 220, some of the discharged liquid crystal droplets leave the nozzle tip 220 and drip onto the glass panel, while the remaining liquid crystal droplets remain at the front end of the nozzle tip 220 without leaving the nozzle tip 220. The liquid crystal remaining at the nozzle tip 220 is suspended from the front end of the nozzle tip 220 into a liquid crystal shape. This is called wetting. The liquid crystal scattering member 230 is prevented from being provided around the surface of the nozzle tip 220 outside the circumference of the surface of the nozzle tip 220 to prevent the liquid crystal droplet remaining on the nozzle tip end 220 from coming along the end without leaving the surface. Metal or ceramic (which faces solid materials) typically has a low contact angle. Thus, the end 22 of the nozzle tip 22 turns. The surface' is spread onto the surface. == crystal; = terminal 220 does not have a liquid crystal dispersion to prevent the liquid crystal from being scattered. C == end of the right nozzle tip 2: the end is spread upward. Therefore, by having the surface liquid crystal scattering member 230, the surface of the nozzle tip 22Q 2 = ^ is prevented from being scattered around the nozzle, and the liquid crystal is prevented from spreading around the outer peripheral surface of the outer surface of the nozzle tip 22 such as the round 4 end. As shown in Fig. 4, it is provided that the liquid crystal distributing member 23 is prevented from being caught in the nozzle. The liquid crystal c is formed only in the shape of a droplet, and the outer surface of the nozzle tip 220 is prevented from being scattered. At the same time, when a phenomenon occurs at the front end of the discharge end 22G, some of the liquid crystal droplets discharged from the nozzle tip 22G remain at the end of the nozzle tip 22〇 without leaving the nozzle tip 22〇. Therefore, the amount of liquid crystal actually dripped onto the glass panel is less than the amount of liquid crystal discharged from the nozzle tip 220. Further, in the procedure of applying the liquid crystal to the glass panel by the nozzle tip 220, the crystal which remains at the front end of the nozzle tip 22G may immediately drop to the glass panel together with the subsequent liquid crystal droplet. Therefore, when the amount of the liquid crystal C remaining without leaving the tip end of the nozzle tip 22 is increased, it becomes difficult to keep the amount of liquid crystal droplets discharged from the crucible to the glass panel constant. SUMMARY OF THE INVENTION In order to apply a precise liquid crystal amount that conforms to a user's preset standard from the nozzle tip, it is necessary to minimize the amount of liquid crystal remaining on the front end of the nozzle tip of the nozzle tip of the 201236765 end after the liquid crystal droplet is applied to the glass panel. Here, the area defined by the amount of residual crystal and the circumference of the tip end of the nozzle tip is referred to as "front end _"', which is the entire area of the portion around the tip of the nozzle: ^, and includes the outlet area of the nozzle money. In other words, when the front end of the nozzle tip is increased, the residual is added. Therefore, in order to reduce the amount of liquid remaining in the spray end, it is necessary to minimize the product without changing the flow path structure of the nozzle tip, i.e., without changing; the mouth = the diameter of the inlet or outlet of the flow path. However, it is known that the banknote end has a heterogeneous lion shape to facilitate assembly procedures and machining procedures. In addition, since the diameter of the flow path at the tip end of the tree mouth is larger than the diameter of the exit pupil, the front end area of the nozzle tip is set in the cylindrical nozzle tip according to the diameter of the inlet *, and the diameter of the front end of the nozzle tip cannot be smaller than The diameter of the person σ at the tip of the nozzle. Therefore, it is known that there is a limit to how much the front end face of the nozzle tip having a miscellaneous nozzle does not change the flow path structure of the nozzle tip. Therefore, the present invention is succinct in the prior art. Problem, the object of the present invention is to provide a nozzle tip which has the same structure as a conventional nozzle tip, but which can reduce the front end face of the nozzle tip. To achieve the above object, the present invention provides a nozzle tip. Coupling the nozzle body, the H nozzle tip flowing out from the nozzle body includes a large area portion having a predetermined front end area, and a small area portion, the front end area of which is smaller than the front end area of the large area portion, and the flow path 'forms through the large area portion and Small area, 'the diameter of the flow path is reduced from the inlet to the outlet, and the liquid crystal is prevented from scattering 201236765, 2 to prevent small areas from along a small area The circumferential cloth member is provided on the outer surface of the outer surface of the small-area portion to discharge the liquid crystal droplets, and is dispersed in the outer surface of the liquid crystal surrounding portion of the small-area portion. The circular small-area portion can be the first in the tube-area portion. The outer end of the liquid crystal dispersing member can be prevented from being smaller than the large area portion. The nozzle preventing tip of the liquid crystal dispersing member can be made of ceramics made of Teflon. The flow path can have a tapered shape. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Fig. 5 is a perspective view of a nozzle tip 32 according to an embodiment of the present invention. Fig. 6 is a nozzle of the invention of the material (10) of the invention. 1®7 A diagram of a liquid crystal shape formed in the center of a nozzle tip according to an embodiment of the present invention. In the following description, "the former one indicates the side from which the nozzle tip 320 discharges the liquid crystal. Referring to FIG. 5 and FIG. 6' The nozzle tip 32〇c of the embodiment includes a large area portion 32, a small area portion 322, a flow path 333, and a liquid crystal preventing member 330. The large area portion 321 has a predetermined front end area. Small 8 201236765 Area portion 32 2 has a front end area which is smaller than the front end area of the large area portion 321. The flow path 333 is formed to pass through the large area portion 321j, H = and the diameter is continuously reduced from the inlet 334 to the outlet 335. The liquid crystal scattering member 330 is prevented from being provided to the small area portion 322. In the embodiment, the large-area portion 321 and the small-area portion 322 are each cylindrical. The large-area portion 321 has a predetermined outer diameter Db and extends a predetermined length. The small-area portion 322 is large. The front end of the area portion 321 is entirely extended by a predetermined length. Further, the small area portion 322 has an outer diameter D2 which is smaller than the outer diameter D of the large area portion 321 and the front end area of the small area portion 322, respectively. The entire area of the portion surrounded by the area of the front end of the area portion 321 and the small area portion 322. The front end area of the small-area portion 322 indicates the entire area of the portion surrounded by the outer end circumference of the small-area portion 322 and includes the area of the outlet 335. In this embodiment, the front end area of the large-area portion 321 is ttDI, and the front end area of the small-area portion 322 is π 〇2. The flow passage 333 is longitudinally formed through the large-faced small-area portion 322 which is integrated with each other. The inlet 334 of the flow path 333 is formed at the rear end of the large-area portion 321. An outlet 335 of 3% of the flow path is formed at the front end of the small-area portion 322. The diameter of the inlet 334 is greater than the diameter of the outlet 335 such that the direct control of the flow path 3 is continuously reduced from the inlet 334 to the outlet 335. Therefore, the longitudinal section of the flow path 333 has a tapered shape. The diameter and length of the accumulation portion 321 and the small-area portion 322 can be determined according to the diameters of the inlet 334 and the outlet 335, the length of the flow passage 333', the cross-sectional area of the nozzle tip 320 required by the user, and the like. ^ The large-area portion 321 and the small-area portion 322 are also made of a material that does not react with the liquid crystal of the flow 201236765 flow passage 333. For example, the large area portion 321 and the small area portion 322 may be made of ceramic. The liquid crystal scattering member 330 is prevented from being provided around the periphery of the outer surface 2 of the small-area portion 322 and prevents the liquid crystal remaining at the front end of the small-area portion 322 after exiting from the outlet 335 without leaving the small-area portion 322 from the periphery of the small-area portion 322. The outer surface is spread out. The liquid crystal scattering member 33 is preferably made of a material having a high contact angle and not reacting with the liquid crystal. For example, the liquid crystal scattering member 330 can be prevented from being made of Teflon (trademark of polytetrafluoroethylene). Teflon has a high contact angle and does not react with liquid crystals. Therefore, in the case where the liquid crystal displacing member 33 made of Teflon is provided around the front end of the small-area portion 322, the liquid crystal discharged from the outlet 335 of the small-area portion 322 can be reliably prevented from being along the small-area portion 322. The surface spreads out. For example, the liquid crystal scattering member 33 is prevented from being formed into a shape of a cylindrical tube and fitted over the small-area portion 322. Alternatively, the liquid crystal scatter preventing member 330 may include a film applied to the outer peripheral surface of the small-area portion 322. In the case of preventing the liquid crystal distributing member 330 from being formed into the shape of a cylindrical tube, the outer diameter D3 of the liquid crystal distributing member 330 is preferably prevented from being smaller than the outer diameter of the large-area portion 321, and the job is to prevent the liquid crystal distributing member 330 from being expensive. It is desirable to minimize the front end area of the liquid crystal scattering member 33A when provided around the outer peripheral surface of the small-area portion 322 because the amount of liquid crystal remaining at the front end of the nozzle tip 32〇 is proportional to the area of the front end of the liquid crystal scattering member Bo. As shown in FIG. 7, the present invention is characterized in that although the flow path 333 of the tip end 32 has the same tapered shape as the prior art, the 201236765 can reduce the front end area of the nozzle tip 320 and is reduced in formation. The amount of liquid crystal c at the front end of the nozzle tip 320. Such an effect can be realized by the structure of the present invention that the small-area portion 322 in which the front end area is smaller than the front end area of the large-area portion 321 is formed around the front end of the diameter reduction of the flow path 333', unlike the conventional linear shape. Nozzle tip. A procedure for dropping liquid crystal from the nozzle tip having the above structure according to an embodiment of the present invention will be described below. The nozzle tip 320 is coupled to the nozzle body 310 to cause liquid crystal to flow from the nozzle body 310 into the nozzle tip 32A. The liquid crystal flowing through the nozzle body 31 passes through the inlet 334 into the flow path 333, and then is dripped out from the nozzle tip 320 through the outlet 335. Meanwhile, the large-area portion 321 and the small-area portion 322 are generally cylindrical in shape as shown in Fig. 5, but may be rectangular or hexagonal. In the structural example in which the liquid crystal flows from the nozzle body 310 into the nozzle tip 320, as shown in Fig. 6, the nozzle tip 320 may be coupled to the nozzle body 310 having a tube shape extending a predetermined length. A flow path 311 having a predetermined diameter is formed longitudinally through the nozzle body 310. The diameter of the flow path 311 of the nozzle body 31 is fixed in the longitudinal direction of the nozzle body 310. The outer diameter of the large-area portion 321 of the nozzle tip 32A is equal to or slightly larger than the diameter of the flow passage 311 of the nozzle body 31〇. Therefore, the nozzle tip 32 is coupled to the nozzle body 31A such that a portion of the nozzle tip 320 fits into the flow path 311 of the nozzle body 310. The application of the nozzle tip 320 of the present invention is not limited to the above examples. That is, the nozzle tip 320 can be applied to any type of nozzle body 31〇, as long as the nozzle tip 36320 can be coupled to the nozzle body 310, the flow path 3Π of the nozzle body 31〇 communicates with the flow path 333 of the nozzle tip 320. And the liquid crystal flowing out of the nozzle body 310 may drip from the outlet 335 of the nozzle tip 32. As described above, in the present invention, the amount of liquid crystal remaining at the front end of the nozzle tip and not leaving the nozzle tip after dropping the liquid crystal from the nozzle tip can be reduced. Therefore, the amount of liquid crystal dropped from the nozzle tip can be accurately controlled within a predetermined range. Further, each time the liquid crystal is dropped from the tip of the nozzle, the amount of liquid crystal dropped from the tip of the nozzle can be kept constant. While the present invention has been described with respect to the preferred embodiments, it will be apparent to those skilled in the art that various modifications, additions, and substitutions can be made in the spirit of the invention as described in the appended claims. Product [simplified description of the diagram] With the two solutions: the medium and the advantages of 'combined with Figure 1 is a perspective view showing the structure of a typical liquid crystal coating machine; section ^ is to provide (4) 1 liquid lings towel _ mouth vertical mouth tip LCD FIG. 5 is a perspective view of a nozzle tip according to an embodiment of the present invention. FIG. 6 is a longitudinal cross-sectional view of a nozzle having a nozzle tip according to an embodiment of the present invention; A drawing of a liquid crystal shape formed at a front end of a nozzle tip according to an embodiment of the present invention is shown. [Main component symbol description] 100 frame 110 pallet 130 coating head unit support frame 140 coating head unit 200 nozzle 210 nozzle body 211 flow path 220 nozzle tip 223 flow path 224 inlet 225 outlet 230 prevents liquid crystal scattering member 300 nozzle 310 nozzle Main body 311 flow path 320 nozzle tip 321 large-area portion 322 small-area portion 330 prevents liquid crystal scattering member 13 201236765 333 flow path 334 inlet 335 outlet C liquid crystal S glass panel D1 large-area outer diameter D2 small-area outer diameter D3 prevention Outer diameter of liquid crystal scattering member