200307826 Ο) 玖、發明說明 【發明所屬之技術領域】 本發明係關於一種顯示用面板之貼合方法及裝置，其 係可在電漿顯示用面板（PDP)或液晶顯示用面板等之顯示 用面板的組合過程中，使兩片透光性基板以光硬化型之黏 著劑貼合的顯示用面板之貼合方法及裝置。 【先前技術】 近年來，在顯示用面板的組合過程中已採用，使兩片 透光性基板在貼合之時，預先將紫外線硬化型之黏著劑夾 入於兩片透光性的玻璃基板之間而形成一體，並以來自於 光照射部之紫外線實施照射而貼合的技術。 以下，將以液晶顯示用面板做例子，而說明顯示用面 板的構造及先前技術之貼合過程。 液晶畫面是由液晶面板、及控制液晶面板之驅動器、 及使液晶面板從裏面照明用之背光板所構成。液晶面板是 將液晶封入，然後控制對其所施加的電壓，而使來自於背 光板的光透過，並且進行遮光而顯示畫面。 第8圖係顯示上述液晶面板（彩色液晶面板）的一例之 圖。同一圖中，101係彩色濾光片基板、102係TFT基板 、103係TFT (薄膜電晶體）元件、104係遮光膜、1〇5係 散布間隔材、106係配向膜、107係封合劑、1〇8爲電極 。爲了使同一圖容易理解起見，將橫方向之尺寸縮成比縱 方向更小而顯示。 -5- (2) (2)200307826 通常，液晶面板如同一圖所示，係由彩色濾光片基板 101及TFT基板102等之2片透光性基板（雖然以下是以 玻璃板說明，但是亦可爲透明之樹脂基板）所構成，一方 上形成有驅動液晶用之驅動元件、例如TFT元件103或在 透明導電膜上形成之液晶驅動電極。另一方之玻璃基板上 則形成有所謂「black matrix」之遮光膜1 04，以及在彩色 液晶面板之情況時爲彩色瀘光片1 〇 1等。 遮光膜1 04例如可利用鉻蒸著膜或黑色之樹脂等所形 成，其係使與影像顯示無關之液晶以外的部份、即液晶驅 動元件或配線之部份等不會由於來自於背光板的光洩漏而 使影像散亂起見，因而扮演遮住之角色。 液晶面板之製造過程中，上述2片玻璃基板在分別製 作之後，以黏著劑貼合（第8圖中爲封合劑1 07)。此時， 在2片玻璃基板之間形成有間隙（gap)，將稱爲「間隔材 (spacer)」的球狀微粒子（第8圖中爲間隔材105)噴霧到此 間隙而可在2片玻璃基板之間注入液晶。 而最近已逐漸採用，在2片玻璃基板貼合之前先在2 片基板之間將液晶充塡之方法（drop fill)。這是因爲上述 2片基板貼合之後再充塡液晶很費時之故。 爲了不使液晶洩露，封合劑兼做爲上述黏著劑之用。 即，黏著劑是塗佈成細線狀而圍住畫面顯示部份。該線之 覓度爲1〜1.5公厘之程度。 第9圖顯示貼合後的液晶面板。 如同一圖所示，在2片基板之間將封合劑1 07夾住所 -6 - (3) (3)200307826 形成的液晶面板1上形成有多個（同一圖中爲4個）晝框。 然後，塗佈封合劑1 〇 7而圍住各畫框，而後形成遮光膜 BM將該封合劑1〇7蓋住。而第9圖中，遮光膜BM僅顯 示在封合劑1 〇 7上形成的部分。 在2片基板貼合後，在同一圖之虛線所顯示的位置上 切斷時，可獲得4面之製品。 雖然液晶面板貼合之過程視製造者不同而有種種的做 法，紫外線從形成遮光部的面照射而形成遮光部的影部分 (遮光部之下的部分）之黏著劑也採用硬化的方法。在此， 上述之所謂遮光部，係指如第8圖所示面板上之目視側（ 表側）之基板上所形成的遮光膜BM、或者利用面板裏側之 基板上形成有配線所造成的不透明部份等之謂。 具體上，如第10(a)圖所示，黏著劑有被夾在遮光膜 與裏側的配線之情形，如第1 〇(b)圖所示，黏著劑成爲在 表側之遮光膜之下方的情形。 爲了使形成遮光部的影部份或者夾住遮光部部分的黏 著劑（以下兩者合起來稱爲「影部分之黏著劑」）硬化，如 第1 1圖所示，因此考慮使光從斜向照射該部分。 例如，日本特許29S7295號公報所記載者，係利用光 之擴散、並且日本特許28284〇3號公報記載顯示有，利用 載置液晶面板之平台表面所反射的光，使影部分之黏著齊IJ 被硬化。 【本發明欲解決之課題】 (4) (4)200307826 但是，如第1 0圖所示，相對於2片基板之間的間隔 約5微米（// m)時，影部分之黏著劑寬度約爲500微米， 如上述日本特許298 7295號公報或日本專利28 2 8403號公 報所記載，僅使用擴散光時無法使充足的光照射在影部分 上，並且僅使用反射光時，反覆地反射之時會使光之強度 變弱，因而有黏著劑無法充分反應之情形。 黏著劑無法充分硬化時，黏著強度會降低因而產生剝 離，此爲造成製品不良的原因。 因而也考慮將光照射部傾斜，同時將載置工件的工作 檯傾斜’然後使光從斜向照射到液晶面板上，因而可積極 地使光照射到遮光部之影部分。 但是，上述方法會有以下說明的問題。 如上述第9圖所示，遮光膜是被設置在基板之縱橫方 向的至少四邊之上，因此光對應於四邊各自之影部分的黏 著劑而照射之時，必須將放射紫外線的光照射部或者載置 有基板之工作檯在四個方向上傾斜而進行光照射。 並且’爲了貼合顯示基板而照射紫外線之時，雖然有 將光一起照射基板整個面之需求，隨著顯示基板之大型化 ，光照射部、紫外線燈之長度均變長，因而在寬度方向上 的支數增加而造成大型化。並且伴隨著基板的大型化，工 作檯也會大型化。 因此’爲了使光照射部或工作檯在四個方向上傾斜， 必須要有寬廣的空間，因而造成裝置的大型化。而且，使 這些在四個方向上傾斜的機構變成複雜，因而越來越大型 -8 - (5) (5)200307826 化。再者，只有一個面板被黏著，卻必需在個別之方向上 傾斜而進行四次的光照射，因而處理時間很長。 本發明係鑑於上述事情而發展成功者，其目的之著眼 點在顯不用面板之貼合過程中，不必將光照射部或工作檯 傾斜，而是使光從斜向對基板照射，因而使遮光部之影部 分的黏著劑有效地受到光照射，因此可以使光硬化型之黏 著劑確實地硬化，而且也可以使基板黏著所需的處理時間 縮短。 【發明內容】 【解決課題所用之手段】 爲了解決上述課題，本發明中，在光照射部與工件之 間設置有光反射構件，其可反射來自於光照射部的光，使 光從斜向而射入到工件。然後，將光反射構件所反射的光 成斜向地射入到遮光部之影部分、或射入到夾在遮光部的 部分上，以使該部分的黏著劑硬化。 上述光反射構件例如，係爲長度比顯示用面板的寬度 更長之三角柱形狀，其係可使來自於光照射部的光朝二個 方向反射，個別反射的光從斜向射入到工件。 並且，將載置有上述光反射構件及工件的工作檯相對 地移動，以使反射構件所反射的光射入到整個工件上’因 而使遮光部上的影部分之黏著劑硬化。 【實施方式】 -9 - (6) (6)200307826 以下將說明本發明之實施形態。而，以下雖然是以液 晶面板爲例子說明’但是只要使隱藏於遮光膜等之遮光部 內的部分之黏著劑硬化的話，本發明亦可同樣地適用到液 晶面板以外的顯示用面板，例如電漿顯示用面板（PDP)。 並且，雖然透光性基板方面以玻璃基板爲例子說明，但是 即使是透明的樹脂基板之時，只要可以使黏著劑硬化的波 長之光透過的話也可以適用。 第1圖係顯示本發明實施例之顯示用面板的貼合裝置 之槪略構成圖。 同一圖之中，符號1是形成上述遮光膜（B Μ)的液晶顯 示用面板（以下亦稱爲工件W)，來自於圖中未顯示之光照 射部之使紫外線硬化型黏著劑硬化用之紫外線，係從工件 W之正上方照射。 上述光照射部，爲了使整個工件W —起被照射，長 度上對應於工件W長度的棒狀燈僅對應於工件W之寬度 的支數成並列設置。光照射部係配置成使光從工件W之 正上方照射，光照射部與載置有上述工件W的工作檯（圖 中未顯示）之間配置有剖面爲等腰三角形狀之光反射構件 2a, 2b 〇 該光反射構件2a，2b之光照射部側之兩面均爲可使光 反射之面，光反射構件2a, 2b在其長軸方向上的長度比工 件W之縱橫寬度更長，例如爲三角柱狀。 光反射構件2 a，2b之反射面上可使用如鋁之全反射鏡 ，亦可使用波長選擇濾光片，其僅反射對黏著劑硬化有效 -10- (7) (7) 之 可 形 上 亦 構 2b 射 之 移 實 僅 射 昭 j \\\ 側 的 反 爲 200307826 波長的光、而熱線等則不照射在工件W上。並且， 以使用表面弄成毛霧狀的亂反射面之玻璃。 而’上述光反射構件2a，2b之各反射面與工件表面 成的角度係設定成使黏著劑硬化之最適條件的適當角 。並且，光反射構件2a，2b之剖面形狀如第2圖所示 可將曲面之光反射構件2a’，2b’二片組合而成者。如 成的話，可使反射光集光在工件W側。 設置有驅動機構（將後述），其可使上述光反射構件 在工件W上掃瞄，利用該驅動機構在來自於上述光 部之紫外線照射之時，使第1光反射構件2a在同一 左右方向上移動，而第2之光反射構件2b則在與上 動方向成直角的方向上移動。 第1圖所示之實施例的黏著劑之硬化處理由以下所 施之。 如第3(a)圖所示，在工作檯4上載置工件W，來自 對應於工件寬度之支數而並列的上述棒狀燈3 a之光 部3、使黏著劑硬化的波長之光從正上方對工件W — 射，使光反射構件2 a在工件W的正上方從同一圖之 向左側掃瞄。 如第3(b)圖所示，來自於光照射部3之光係從工件 正上方對工件W照射，同時在光反射構件2a之斜面 射，而對工件W成斜向地射入。 如前面所述，光反射構件2a之光照射部側之兩面 可反射光之面，因此若光反射構件2a爲等腰三角形 亦 所 度 此 2a 照 圖 述 述 於 照 直 右 W 上 均 狀 -11 - (8) (8)200307826 的話，則在同一圖（7 ) ( 4 )之兩方的影部分以相同的入 射角度射入時，可使影部分的黏著劑硬化。即，利用上述 光反射構件2a在工件W上掃瞄一次時，可使同一圖（7 ) (彳）之兩方的影部分之黏著劑硬化。 如上所述，使光反射構件2a在工件W之全面上沿著 第1圖之A方向掃瞄之後，對該光反射構件2 a配置成直 角的方向之光反射構件2b在工件W之全面上沿著第1圖 之B方向掃瞄。 因此，可完成一片工件W之黏著處理。 上述光反射構件2a，2b之掃瞄速度亦可爲非固定。例 如，可在對掃瞄方向成直角的遮光膜BM之附近，使掃瞄 速度變慢或停止，因而使影部分之黏著劑充分地受到紫外 線的照射。要點在於，只要設定成使影部分之黏著劑有效 地受到紫外線的照射即可。 並且，亦可將上述光反射構件做成單件，並使光反射 構件或者工作檯轉動90° 。但是，液晶面板爲大型之情況 時，載置液晶面板的工作檯也會變成大型，使其移動的機 構也會大型化，移動場所也必須寬廣，因此使裝置變成大 型化。 驅動上述光反射構件2a，2b之機構方面，雖然可以採 用種種的機構，但是以下將說明驅動第1之光反射構件 2a及第2之光反射構件2b之驅動機構的具體構成例以及 其動作。 第4圖係顯示具有上述驅動機構之顯示用面板貼合裝 -12- (9) (9)200307826 置的構成例之圖。第4(a)圖是從與本實施例燈的長邊方向 成平行的方向看去之圖（正面圖）。第4(b)圖係與同一裝置 燈的長邊方向成直角的方向看去之圖（側面圖）。而且第5 圖、第6圖爲其動作之說明圖。 第4圖中’符號3係光照射部，光照射部3上內藏有 使含有貼合用黏著劑硬化之波長的光射出之多個棒狀燈 3 a，及將來自於個別的燈3 a之光反射之鏡子3 b。 而’來自於棒狀燈3 a的光，及在上述鏡子3 b反射的 光介由石英窗等之窗構件而從光照射部進行照射，同一圖 之中未顯示有窗構件。 上述棒狀燈3 a例如可使用棒狀之高壓水銀燈或鹵素 燈。上述燈之長度或支數可配合貼合液晶面板的面積而適 當地選擇，以獲得所需照度及照度分佈。 符號4係工作檯，工作檯4之上載置有工件W(液晶 面板）。 第1之光反射構件2a在第4(a)圖之工作檯4的左右 方向上移動。使光反射構件2a移動用之下軌道5被設置 在工作檯4之兩側的底板7上。如第4(b)圖所示，光反射 構件2a由在下軌道5上移動的支撐構件5a所支撐，而設 置成跨在工作檯4上。 並且，第2之光反射構件2b在對第1之光反射構件 2a成直角的方向、即第4(b)圖中之工作檯4上的左右方 向上移動。光反射構件2b移動用之上軌道6被設置在光 照射部3之兩側。如第4(b)圖所示，光反射構件2b係由 -13- (10) (10)200307826 沿著上軌道6移動之懸吊構件6 a而懸吊在工作檯4上方 〇 而，該懸吊構件6a具有可伸縮之氣缸等之滑動機構 ’其可使第2之光反射構件2b下降到工件W之正上方爲 止。因而，第2之光反射構件2b在第1之光反射構件2a 於工件W上移動之時，不產生干涉地懸吊在上部。 以下將以第5圖、第6圖說明第4圖之裝置的動作。 上述第4圖係進行貼合的工件W載置於工作檯4上 的狀態。從此處開始進行處理。 從光照射部3開始光的照射。如第5(a)圖所示，第1 之光反射構件2a在工件W上掃瞄。因而第1之光反射構 件2 a之反射光在工件W成斜向方向射入。對應於工件W 之第1光反射構件2a的反射方向之影部分亦受到光的照 射，使影部分的黏著劑硬化。 如第5(b)圖所示，懸吊第2之光反射構件2b之懸吊 構件6a朝下方伸出，使第2之光反射構件2b下降到與第 1之光反射構件2a相同的高度上。 此時，第1之光反射構件2 a及其支撐構件5 a不與第 2之光反射構件2b及其懸吊構件6a產生干涉，因而必須 退避到第2光反射構件2b之移動範圍外。因此，本實施 例中，下軌道5比上軌道6之設置寬度更長，而可使第1 之光反射構件2a退避到第2之光反射構件2b之移動範圍 外。 如第6(c)圖所示，第2之光反射構件2b在工件W上 -14- (11) (11)200307826 掃瞄。因而，第2之光反射構件2b之反射光在工件W成 斜向方向射入。對應於工件W之第2光反射構件2b的反 射方向之影部分亦受到光的照射’而使影部分的黏著劑硬 化。 如第6(d)圖所示，懸吊構件6a縮回，可使第2光反 射構件2b向上方退避。 由以上之說明，可完成液晶面板之貼合處理。停止來 自於光照射部3之光照射，然後將工件W從工作檯4移 出。 雖然第4圖係直線狀之二支光反射構件2a，2b在二個 方向上掃瞄的裝置之構成例，但是在光反射構件之構造上 更進一步改進之時，例如使光反射構件形成L字形狀之時 ，僅須在一個方向上掃瞄，對縱橫方向之遮光膜BM之影 部分而言，可使光從兩方向照射。 第7圖係使上述光反射構件構成L字形狀而在一個方 向上掃瞄的裝置之槪略構成圖。同一圖係顯示工件W及 光反射構件從光反射方向看去時之構成。 第7圖顯示的光反射構件1 2係將上述剖面爲三角形 之二個光反射構件12a，12b組合，而構成互相正交的L 字形狀者，L字形狀之角部是由軌道13上移動之圖中未 顯示的支撐構件所支撐。 上述光反射構件12配置成對工件W之遮光膜BM成 45°之角度，一方面來自於圖中未顯示之光照射部的光進 行照射，一方面將上述光反射構件1 2在工件W上掃瞄。 -15- (12) (12)200307826 因而，光照射在以一次掃瞄而在工件W上形成的縱 、橫方向上之遮光膜BM的影部分上，因此使黏著劑硬化 〇 另外，雖然亦有考慮各式各樣的裝置構成，從裝置之 大小或處理時間等之條件而適當地選擇必須的構成的話較 佳。 【發明的效果】 如以上之說明，本發明中不必使光照射部或工作檯傾 斜，就可以使光從斜向照射在形成有遮光膜之液晶面板上 ，因此可較簡單地使用小型裝置而將遮光部之影部分的黏 著劑有效且確實地硬化。 並且，光反射構件係由使來自於光照射部的光朝二個 方向反射的反射構件所構成，因而只要使光反射構件在一 個方向或者二個方向掃瞄之時，即可使光從四個方向照射 工件而進行黏著劑之硬化處理。因此，可使處理時間短縮 化。 【圖式簡單說明】 第1圖係顯示本發明之實施例的顯示用面板貼合裝置 的槪略構成之圖。 第2圖係顯示光反射構件的剖面形狀做成曲面之情況 的構成例之圖。 第3圖係利用第1圖所顯示之實施例進行黏著劑之硬 -16- (13) (13)200307826 化處理的說明用圖。 第4圖係顯75具有驅動第1、第2光反射構件之驅動 機構的裝置之構成例之圖。 第5圖係第4圖之裝置的動作說明圖（1)。 第6圖係第4圖之裝置的動作說明圖（2)。 第7圖係顯示光反射構件做成L字形狀之槪略構成圖 〇 第8圖係顯示液晶面板（彩色液晶面板）的一例之圖。 第9圖是顯示貼合後之液晶面板之圖。 第10圖是遮光膜（BM)等所形成變成遮光部之影部分 的說明圖。 第1 1圖是爲了使遮光部之影的部分之黏著劑硬化而 使光從斜向方向射入之情形的說明用圖。 主要元件對照表 11 晝面 1 液晶顯示用面板 W 工件 2a，2b，2a，，2b’ 光反射構件 4 工作檯 3 光照射部 3 a 棒狀燈 3b 鏡子 5 下軌道 -17- (14) 200307826 7 底板 5a 支撐構件 6 上軌道 6a 懸吊構件 12，12a，12b 光反射構件 -18-200307826 〇) 发明. Description of the invention [Technical field to which the invention belongs] The present invention relates to a bonding method and device for a display panel, which can be used for display of a plasma display panel (PDP) or a liquid crystal display panel. In the process of assembling the panels, a method and a device for bonding display panels in which two light-transmitting substrates are bonded with a light-curable adhesive. [Prior Art] In recent years, it has been adopted in the process of assembling display panels. When two transparent substrates are bonded, a UV-curable adhesive is sandwiched between the two transparent substrates in advance. It is a technology that forms an integrated body and irradiates with ultraviolet rays from a light irradiating part. In the following, a liquid crystal display panel is taken as an example to explain the structure of the display panel and the bonding process of the prior art. The liquid crystal screen is composed of a liquid crystal panel, a driver for controlling the liquid crystal panel, and a backlight panel for lighting the liquid crystal panel from the inside. In a liquid crystal panel, a liquid crystal is enclosed, and then a voltage applied to the liquid crystal panel is controlled to transmit light from a backlight plate and to block light to display a screen. Fig. 8 is a diagram showing an example of the above-mentioned liquid crystal panel (color liquid crystal panel). In the same figure, 101 series color filter substrates, 102 series TFT substrates, 103 series TFT (thin film transistor) elements, 104 series light-shielding films, 105 series dispersion spacers, 106 series alignment films, 107 series sealants, 108 is an electrode. In order to make the same figure easy to understand, the horizontal dimension is reduced to be smaller than the vertical dimension and displayed. -5- (2) (2) 200307826 Generally, as shown in the same figure, the liquid crystal panel is composed of two transparent substrates, such as a color filter substrate 101 and a TFT substrate 102. It may be a transparent resin substrate), and a driving element for driving liquid crystal, such as a TFT element 103 or a liquid crystal driving electrode formed on a transparent conductive film, is formed on one side. On the other glass substrate, a so-called "black matrix" light-shielding film 104 is formed, and in the case of a color liquid crystal panel, a color phosphor film 101 is used. The light-shielding film 104 can be formed using, for example, a chrome vapor-deposited film or a black resin. The light-shielding film is made of a portion other than the liquid crystal which is not related to the image display, that is, a portion of the liquid crystal driving element or wiring. The light leaks and scatters the image, so it plays a role of obscuration. In the manufacturing process of the liquid crystal panel, after the two glass substrates are manufactured separately, they are bonded with an adhesive (the sealing agent 107 in Fig. 8). At this time, a gap is formed between the two glass substrates, and spherical fine particles (spacer 105 in FIG. 8) are sprayed into the gap, so that two sheets can be separated into two. Liquid crystal is injected between the glass substrates. Recently, a method of filling the liquid crystal between two substrates (drop fill) before laminating the two glass substrates has been gradually adopted. This is because it is time-consuming to charge the liquid crystal after the two substrates are bonded. In order to prevent the liquid crystal from leaking, the sealing agent also serves as the above-mentioned adhesive. That is, the adhesive is applied in a thin line shape to surround the screen display portion. The degree of search of the line is about 1 to 1.5 mm. Fig. 9 shows the bonded LCD panel. As shown in the same figure, a plurality of (four in the same figure) day frames are formed on the liquid crystal panel 1 formed by sandwiching the sealing agent 107 between the two substrates. Then, the sealant 107 was applied to surround each picture frame, and then a light-shielding film was formed. BM covered the sealant 107. In Fig. 9, the light-shielding film BM shows only a portion formed on the sealing agent 107. When two substrates are bonded together and cut at the position shown by the dotted line in the same figure, a four-sided product can be obtained. Although the process of bonding liquid crystal panels varies depending on the manufacturer, ultraviolet rays are irradiated from the surface forming the light-shielding portion to form a shadow portion (the portion below the light-shielding portion) of the light-shielding portion. The adhesive is also hardened. Here, the above-mentioned light-shielding portion refers to a light-shielding film BM formed on a substrate on the visual side (front side) of the panel as shown in FIG. 8 or an opaque portion caused by wiring formed on the substrate on the rear side of the panel. That is equal. Specifically, as shown in FIG. 10 (a), the adhesive may be sandwiched between the light-shielding film and the wiring on the back side. As shown in FIG. 10 (b), the adhesive becomes under the light-shielding film on the front side. situation. In order to harden the shadow forming part of the light-shielding part or the adhesive that sandwiches the light-shielding part (the following two are collectively referred to as "adhesive for the shadow part"), as shown in Fig. 11, it is considered to make the light oblique. Irradiate that part. For example, those disclosed in Japanese Patent No. 29S7295 use diffusion of light, and Japanese Patent No. 28284403 shows that the light reflected on the surface of a stage on which a liquid crystal panel is placed is used to make the adhesion of the shadow portion uniform. hardening. [Problems to be Solved by the Invention] (4) (4) 200307826 However, as shown in FIG. 10, the width of the adhesive at the shadow portion is about 5 micrometers (// m) relative to the distance between the two substrates. Approximately 500 microns, as described in the aforementioned Japanese Patent No. 298 7295 or Japanese Patent No. 28 2 8403, sufficient light cannot be irradiated on the shadow portion when only diffused light is used, and repeated reflection is used only when reflected light is used. At this time, the intensity of light will be weakened, so that the adhesive may not fully react. When the adhesive cannot be sufficiently hardened, the adhesive strength is reduced and peeling occurs, which is the cause of defective products. Therefore, it is also considered that the light irradiating portion is inclined, and at the same time, the worktable on which the workpiece is placed is inclined ', and then the light is irradiated onto the liquid crystal panel from an oblique direction, so that the light can be actively irradiated to the shadow portion of the light shielding portion. However, the above method has the problems described below. As shown in FIG. 9 above, the light-shielding film is provided on at least four sides in the vertical and horizontal directions of the substrate. Therefore, when light is irradiated with the adhesive on the shadow portions of the four sides, it is necessary to irradiate the light with ultraviolet light or The stage on which the substrate is placed is inclined in four directions to perform light irradiation. In addition, in the case of irradiating ultraviolet rays for bonding display substrates, although it is necessary to irradiate the entire surface of the substrate with light, as the display substrate becomes larger, the length of the light irradiating section and the ultraviolet lamp becomes longer. The increase in the number of branches resulted in large-scale. In addition, as the substrate becomes larger, the work table becomes larger. Therefore, in order to incline the light irradiating part or the table in four directions, a wide space must be provided, which leads to an increase in the size of the device. Moreover, these mechanisms that tilt in four directions have become complicated, and have become larger and larger in size-(5) (5) 200307826. Furthermore, only one panel is adhered, but it must be tilted in individual directions for four times of light irradiation, so the processing time is long. The present invention has been developed in view of the above-mentioned matters. The purpose of the present invention is to avoid the need to tilt the light irradiating part or the table during the bonding process of the display panel. Instead, the light is irradiated to the substrate from an oblique direction, thereby shielding the light. The adhesive of the shadow portion is effectively irradiated with light, so that the light-curable adhesive can be hardened reliably, and the processing time required for substrate adhesion can be shortened. [Summary of the Invention] [Means for Solving the Problems] In order to solve the above-mentioned problems, in the present invention, a light reflecting member is provided between the light irradiating section and the workpiece, which can reflect the light from the light irradiating section and make the light obliquely And shot into the workpiece. Then, the light reflected by the light reflecting member is incident obliquely on the shadow portion of the light shielding portion or on the portion sandwiched by the light shielding portion to harden the adhesive in this portion. The light reflecting member has, for example, a triangular prism shape having a length longer than the width of the display panel. The light reflecting member can reflect light from the light irradiating portion in two directions, and the light reflected individually enters the workpiece from an oblique direction. Then, the table on which the light reflecting member and the workpiece are placed is relatively moved so that the light reflected by the reflecting member is incident on the entire workpiece ', so that the adhesive of the shadow portion on the light shielding portion is hardened. [Embodiment] -9-(6) (6) 200307826 The embodiment of the present invention will be described below. In the following description, although a liquid crystal panel is taken as an example, as long as the adhesive hidden in a light-shielding portion such as a light-shielding film is cured, the present invention can be similarly applied to a display panel other than a liquid crystal panel, such as a plasma. Display Panel (PDP). In addition, although a glass substrate is described as an example of the light-transmitting substrate, even a transparent resin substrate can be applied as long as it can transmit light having a wavelength hardened by the adhesive. Fig. 1 is a schematic configuration diagram showing a bonding device for a display panel according to an embodiment of the present invention. In the same figure, reference numeral 1 is a liquid crystal display panel (hereinafter also referred to as a workpiece W) forming the above-mentioned light-shielding film (BM), which is used to harden an ultraviolet-curable adhesive from a light-irradiating portion not shown in the figure. The ultraviolet rays are irradiated from directly above the workpiece W. In order to irradiate the entire work W together, the light irradiating section is arranged in parallel with the rod-shaped lamps corresponding in length to the length of the work W only corresponding to the width of the work W. The light irradiating portion is configured to irradiate light directly above the workpiece W, and a light reflecting member 2a having an isosceles triangle cross section is disposed between the light irradiating portion and a table (not shown) on which the workpiece W is placed , 2b 〇 Both sides of the light irradiating part side of the light reflecting members 2a, 2b are surfaces that can reflect light, and the length of the light reflecting members 2a, 2b in the long axis direction is longer than the width and width of the workpiece W, for example It is triangular columnar. The reflective surfaces of the light reflecting members 2 a and 2 b can use a total reflection mirror such as aluminum, or a wavelength selective filter, which only reflects the shape that is effective for curing the adhesive -10- (7) (7) Also, the structure of 2b is only used to emit light with the wavelength of 200307826 on the side of j \\\, and the hot wire is not irradiated on the workpiece W. Furthermore, a glass with a chaotic reflection surface having a misty surface is used. The angle formed between each of the reflection surfaces of the light reflecting members 2a and 2b and the surface of the workpiece is set to an appropriate angle under the optimum conditions for curing the adhesive. The cross-sectional shapes of the light reflecting members 2a, 2b are as shown in Fig. 2. Two curved light reflecting members 2a ', 2b' can be combined. If so, the reflected light can be collected on the workpiece W side. A driving mechanism (to be described later) is provided, which can scan the light reflecting member on the workpiece W, and uses the driving mechanism to make the first light reflecting member 2a in the same left and right direction when the ultraviolet light from the light part is irradiated. It moves up, and the second light reflection member 2b moves in a direction perpendicular to the upward movement direction. The hardening treatment of the adhesive of the embodiment shown in Fig. 1 is performed as follows. As shown in FIG. 3 (a), a workpiece W is placed on the table 4 from the light portion 3 of the rod-shaped lamp 3a juxtaposed in accordance with the number of the width of the workpiece, and light of a wavelength at which the adhesive is hardened Directly above the workpiece W, the light reflecting member 2 a is scanned directly above the workpiece W from the same figure to the left. As shown in Fig. 3 (b), the light from the light irradiating section 3 irradiates the work W from directly above the work, and simultaneously irradiates the work W with a slope, and enters the work W obliquely. As mentioned above, the two sides of the light-radiating part side of the light reflecting member 2a can reflect the light. Therefore, if the light reflecting member 2a is an isosceles triangle, this 2a is described in the figure on the right and uniformly on W. -11 -(8) (8) 200307826, when the two shadow parts of the same figure (7) (4) are shot at the same angle of incidence, the adhesive of the shadow parts can be hardened. That is, when the light reflecting member 2a is used to scan the workpiece W once, the adhesives on the two shadow portions of the same figure (7) (i) can be hardened. As described above, after the light reflecting member 2a is scanned along the entire direction of the workpiece W in the direction A of FIG. 1, the light reflecting member 2b arranged at a right angle to the light reflecting member 2a is arranged on the entire surface of the workpiece W. Scan in direction B of Figure 1. Therefore, the adhesion processing of a piece of workpiece W can be completed. The scanning speed of the light reflecting members 2a and 2b may be non-constant. For example, the scanning speed can be slowed down or stopped near the light-shielding film BM at a right angle to the scanning direction, so that the adhesive at the shadow portion can be sufficiently irradiated with ultraviolet rays. The point is that it is sufficient to set the shadow adhesive to be effectively irradiated with ultraviolet rays. Alternatively, the light reflecting member may be made as a single piece, and the light reflecting member or the table may be rotated by 90 °. However, when the liquid crystal panel is large, the table on which the liquid crystal panel is placed also becomes large, so that the mechanism for moving it becomes large, and the moving place must be wide, so the device becomes large. Although various mechanisms can be used for the mechanism for driving the light reflecting members 2a and 2b, specific examples of the driving mechanism for driving the first light reflecting member 2a and the second light reflecting member 2b and the operations thereof will be described below. Fig. 4 is a diagram showing a configuration example of a display panel lamination having the above-mentioned driving mechanism. (12) (9) (9) 200307826 Fig. 4 (a) is a view seen from a direction parallel to the long-side direction of the lamp of this embodiment (front view). Fig. 4 (b) is a view (side view) viewed at right angles to the longitudinal direction of the lamp of the same device. 5 and 6 are explanatory diagrams of operations. In FIG. 4, the symbol “3” is a light irradiating part. The light irradiating part 3 contains a plurality of rod-shaped lamps 3 a for emitting light having a wavelength that hardens the adhesive for bonding, and the individual lamps 3 a's light reflecting mirror 3 b. The light from the rod-shaped lamp 3a and the light reflected by the mirror 3b are irradiated from a light irradiation portion through a window member such as a quartz window, and the window member is not shown in the same figure. As the rod-shaped lamp 3a, for example, a rod-shaped high-pressure mercury lamp or a halogen lamp can be used. The length or the number of the lamps can be appropriately selected according to the area of the LCD panel to obtain the required illuminance and illuminance distribution. The reference numeral 4 is a table, on which a work W (liquid crystal panel) is placed. The first light reflecting member 2a moves in the left-right direction of the table 4 in Fig. 4 (a). The lower rails 5 for moving the light reflecting member 2a are provided on the bottom plates 7 on both sides of the table 4. As shown in FIG. 4 (b), the light reflecting member 2a is supported by a supporting member 5a that moves on the lower rail 5, and is arranged to straddle the table 4. Then, the second light reflecting member 2b moves in a direction at right angles to the first light reflecting member 2a, i.e., the left and right directions on the table 4 in Fig. 4 (b). The upper rails 6 for moving the light reflecting member 2b are provided on both sides of the light irradiation section 3. As shown in FIG. 4 (b), the light reflecting member 2b is suspended above the table 4 by a suspension member 6a that moves along the upper track 6 from -13- (10) (10) 200307826. The hanging member 6a has a sliding mechanism such as a telescopic air cylinder, which can lower the second light reflecting member 2b just above the work W. Therefore, when the second light reflecting member 2b is moved on the workpiece W, the second light reflecting member 2b is suspended from the upper portion without interference. The operation of the device of Fig. 4 will be described below with reference to Figs. 5 and 6. The above-mentioned fourth figure is a state in which the workpiece W to be bonded is placed on the table 4. Start processing here. The light irradiation unit 3 starts the irradiation of light. As shown in FIG. 5 (a), the first light reflecting member 2a is scanned on the workpiece W. Therefore, the reflected light of the first light reflecting member 2a is incident on the workpiece W in an oblique direction. The shadow portion corresponding to the reflection direction of the first light reflecting member 2a of the workpiece W is also irradiated with light, and the adhesive of the shadow portion is hardened. As shown in FIG. 5 (b), the suspension member 6a that suspends the second light reflecting member 2b is extended downward, so that the second light reflecting member 2b is lowered to the same height as the first light reflecting member 2a. on. At this time, since the first light reflecting member 2a and its supporting member 5a do not interfere with the second light reflecting member 2b and its suspension member 6a, it must retreat outside the moving range of the second light reflecting member 2b. Therefore, in this embodiment, the lower track 5 has a longer width than the upper track 6, and the first light reflecting member 2a can be retracted out of the moving range of the second light reflecting member 2b. As shown in FIG. 6 (c), the second light reflecting member 2b is scanned on the workpiece W -14- (11) (11) 200307826. Therefore, the reflected light of the second light reflecting member 2b is incident on the workpiece W in an oblique direction. The shadow portion corresponding to the reflection direction of the second light reflecting member 2b of the workpiece W is also irradiated with light 'to harden the adhesive of the shadow portion. As shown in Fig. 6 (d), the suspension member 6a is retracted, and the second light reflecting member 2b can be retracted upward. From the above description, the bonding process of the liquid crystal panel can be completed. The light irradiation from the light irradiation section 3 is stopped, and then the work W is removed from the table 4. Although FIG. 4 shows a configuration example of a device that scans two linear reflection members 2a and 2b in two directions, when the structure of the light reflection member is further improved, for example, the light reflection member is formed into an L In the shape of a letter, it is only necessary to scan in one direction. For the shadow portion of the light shielding film BM in the vertical and horizontal directions, light can be irradiated from both directions. Fig. 7 is a schematic configuration diagram of a device in which the light reflecting member is formed in an L shape and scanned in one direction. The same figure shows the structure of the workpiece W and the light reflecting member when viewed from the light reflection direction. The light reflecting member 12 shown in FIG. 7 is a combination of the two light reflecting members 12 a and 12 b having a triangular cross section to form an orthogonal L shape. The corners of the L shape are moved on the track 13. Supported by support members not shown in the figure. The light reflecting member 12 is disposed at an angle of 45 ° to the light shielding film BM of the workpiece W. On the one hand, the light from a light irradiating portion not shown in the figure is irradiated, and on the other hand, the light reflecting member 12 is placed on the workpiece W. Scan. -15- (12) (12) 200307826 Therefore, light irradiates the shadow portion of the light-shielding film BM in the vertical and horizontal directions formed on the workpiece W in one scan, so that the adhesive is hardened. In addition, although There are various types of device configurations, and it is preferable to appropriately select necessary configurations from conditions such as the device size and processing time. [Effects of the Invention] As described above, in the present invention, it is possible to irradiate light from an oblique direction on a liquid crystal panel formed with a light-shielding film without tilting the light irradiating section or the table. Therefore, it is relatively easy to use a small device. The adhesive of the shadow portion of the light-shielding portion is effectively and surely cured. In addition, the light reflecting member is composed of a reflecting member that reflects light from the light irradiating section in two directions. Therefore, as long as the light reflecting member is scanned in one direction or two directions, the light can be changed from four directions. Irradiate the workpiece in all directions to harden the adhesive. Therefore, the processing time can be shortened. [Brief Description of the Drawings] FIG. 1 is a diagram showing a schematic configuration of a display panel bonding apparatus according to an embodiment of the present invention. Fig. 2 is a diagram showing an example of a configuration in which the cross-sectional shape of the light reflecting member is curved. Fig. 3 is a diagram for explaining the hardening process of the adhesive using the embodiment shown in Fig. -16- (13) (13) 200307826. Fig. 4 is a diagram showing a configuration example of a device having a driving mechanism for driving the first and second light reflecting members. Fig. 5 is an operation explanatory diagram (1) of the device of Fig. 4; Fig. 6 is an operation explanatory diagram (2) of the device of Fig. 4; FIG. 7 is a diagram showing a schematic configuration of an L-shaped light reflecting member. FIG. 8 is a diagram showing an example of a liquid crystal panel (color liquid crystal panel). FIG. 9 is a diagram showing a liquid crystal panel after bonding. Fig. 10 is an explanatory diagram of a shadow portion formed by a light-shielding film (BM) or the like which becomes a light-shielding portion. Fig. 11 is a diagram for explaining a case where light is incident from an oblique direction in order to harden an adhesive of a portion of the shadow portion. Comparison table of main components 11 Daytime surface 1 Liquid crystal display panel W Workpiece 2a, 2b, 2a, 2b 'Light reflecting member 4 Table 3 Light irradiating section 3 a Rod light 3b Mirror 5 Lower rail -17- (14) 200307826 7 Base plate 5a Support member 6 Upper rail 6a Suspension member 12, 12a, 12b Light reflecting member -18-