200423797 玖、發明說明： 【發明所屬之技術領域】 本發明涉及一種有機EL(Electroluminescence :電致發光） 面板及其製造方法。 【·先前技術】 專利文獻1 :特開平8 — 321381號公報 專利文獻2 ··特開平9 — 127885號公報 有機EL面板是以有機EL元件為基本結構，把該有機eL元 件作為單位面發光部件排列在平面基板上而形成的，該有 機EL元件是通過在支撐基板上形成第一電極，在其上形成 包含由有機化合物構成的發光層的有機層，再在其上形成 第二電極而構成的。 在該有機EL元件中，將所述第一電極、第二電極中的一 方制成由ITO等構成的透明電極，同時將另一方制成由A1 、Mg等構成的光反射性金屬電極，從透明電極側獲取由發 光層等發出的光。可以考慮以下方式··將透明的支撐基板 上的第一電極制成透明電極，從支撐基板側獲取光的底部 發光（b〇ttom emissi〇n)方式；將支撐基板上的第一電極制成 金屬私極’同時將第二電極制成透明電極，從第二電極側 獲取光的頂部發光（t〇p emissi〇n)方式。 在這種有機EL元件中’為了使由發光層等發出的光從透 :電極側有效射出’使與透明電極相對設置的金屬電極為 高反射率以提高發光亮度。可是’由於對從外部入射到面 板内的光而言金屬電極也成為高反射率的反射鏡而反射該 O:\92\92640.DOC 5 200423797 光，因此產生以下⑽：由於該外部入射&，在非發光時 映出外界景色’而在發光時對比度降低或處於不能顯示^ 色等的狀態，顯示性能降低。 作為處理該問題的有效對策，提出了專利文獻i、2中記 載的技術方案。該技術方案是在有機£1面板的光射出面上 叹置由圓偏振片構成的光學濾波器。這樣，雖然從外部入 射併通過圓偏振片的光成為右或左圓偏振光，但在通過面 板内的金屬电極反射該圓偏振光時，圓偏振光的方向發生 翻轉，所以攸外部入射又由面板内的金屬電極反射回來的 光被圓偏振片截止，不能射出到外部。 另一方面，已知當所述有機層和電極暴露於外氣中時有 機EL面板的特性會劣化。這是由於水分浸入有機層和電極 的界面而妨礙了電子注入、產生非發光區域或電極腐蝕現 象而造成的，為了提高有機EL元件的穩定性和耐久性，使 有機EL元件隔絕於外氣的密封技術是必不可少的。關於該 密封技術，一般採用以下方法··在形成有電極和有機層的 支撐基板上，通過粘接劑粘貼覆蓋該電極和有機層的密封 部件。 圖1是表示以往的具有密封部件的有機EL面板的說明圖 。有機EL面板1中，在支撐基板2的一面上形成有層疊了由 透明電極構成的第一電極3、含有發光層的有機層4和由金 屬電極構成的第二電極5的有機EL元件，該有機el元件由 通過钻接劑6钻貼在支樓基板2的一面上的密封部件7所密 封。另外，在支撐基板2的另一面上設置有由前述的圓偏振 O:\92\92640 DOC 5 200423797 片構成的光學濾波器8。 此處’作為禮、封部件7多使用玻璃制基板，也有用包含隔 離物的钻接劑6粘貼平坦的玻璃基板的情況，但一般如圖1 所示’在您封部件7的一面側形成由密封凹部形成的密封 二間’在5亥岔封凹部7 A的底面上設置有乾燥劑9。這種密封 凹部7A通常是通過利用研磨材料進行喷砂處理或使用藥液 進行餘刻處理而形成的，但是用這種方法，密封凹部7 A的 斜面a成為粗糙面，在該處形成了漫反射部。 在這種以往的有機EL元件丨中，來自外部的光Lqi通過光 學濾波杰、8入射到面板内時，成為右或左方向的圓偏振光 L〇2 ’其被由金屬電極構成的第二電極5鏡面反射後，成為 方向相反的圓偏振光L〇3。因此，如前面所述，從外部入射 併被第二電極5反射後的光被光學濾波器8截止，不能射出 到外部。但是，如前面所述，如果在面板内形成有漫反射 部，則即使來自外部的光Lll通過光學濾波器8入射到面板 内而成為右或左方向的圓偏振光L!2，也會被漫反射部反射 成為偏振面紊亂的光Lu，所以產生通過光學濾波器8的反射 光L!4，局部地產生光學濾波器8不能有效起作用的部位。 因此’產生以下問題：在發光時在面板的周邊部等射出 反射光而導致對比度降低，而在非發光時產生外部景色被 映出的現象而使顯示性能劣化。 【發明内容】 本發明將解決這種問題作為一個課題。即，本發明的目 的在於，防止由於入射到面板内的外部入射光被面板内的 O:\92\92640.DOC 5 200423797 度反射部反射而導致顯示性能劣化。 為了達到上述目的，本發明至少具備以下的構成。— 一種有機EL面板，在支撐基板的一面上設置由圓偏振片 構成的光學濾波器，在所述支樓基板的另一面上形成有機 EL元件’所述有機EL元件具有第一電極和第二電極以及夾 在該弟 、弟一電極之間的有機層，所述第一電極和第二 %極至少一方由透明電極構成，所述有機層至少含有發光 層’在所述另一面上粘貼著形成有用於密封所述有機EL元 件的岔封凹部的密封部件，其特徵在於，設有防止入射到 面板内的外部入射光被面板内的漫反射部反射的漫反射防 止單元。 一種有機EL·面板的製造方法，在支撐基板的一面上設置 由圓偏振片構成的光學濾波器，在所述支撐基板的另一面 上形成有機EL元件，所述有機el元件具有第一電極和第二 :極以及夾在該第一、第二電極之間的有機層，所述第一 電極和第二電極至少一方由透明電極構成，所述有機層至 少含有發光層，所述另一面上粘貼著形成有用於密封所述 有機EL元件的密封凹部的密封部件，其特徵在於，設有防 止入射到面板内的外部入射光被面板内的漫反射部反射的 漫反射防止單元。 【實施方式] 、下> 附圓說明本發明的實施方式。圖2是表示本發 月的貫苑方式涉及的有機EL面板的說明圖。首先，說明 本發明的實施方式涉及的有機虹面板1G的基本結構，在支 O:\92\92640 DOC 5 200423797 撐基板11的一面上設置由圓偏振片構成的光學濾波器1 8， 在所述支撐基板11的另一面上形成有機EL元件，所述有_^為 EL元件具有第一電極12和第二電極14以及夾在該第一、第 二電極之間的有機層13，所述第一電極12和第二電極14至 少一方由透明電極構成，所述有機層丨3至少含有發光層， 利用枯接劑16把形成有用於密封所述有機el元件的密封凹 部15A的密封部件15粘貼在支撐基板11的另一面上。在以下 所示的實施方式中，以支撐基板丨丨側為光射出面的底部發 光方式為例，但本發明不限定於此。 而且，在密封部件15上形成的密封凹部15A的底面上安裝 有乾燥劑17，該密封凹部15A的斜面&為粗糙面，形成漫反 射邛。有日守廷種漫反射部不僅是由所述斜面&形成的，而是 在各種形成過程中形成在面板内的。以下的各實施方式具 有防止入射到面板内的外部入射光被這種漫反射部反射的 漫反射防止單元’這樣，不會出現外部人射光被漫反射部 反射併通過光學濾波器丨8射出的情況，可以在支撐基板整 個面上確保光學濾波器18的功能，防止有機虹面板的顯示 性能劣化。 下。兄月各個貝施方式的特徵。在以下說明中，以由斜 -形成的漫反射部為例進行說明，但對其他漫反射部也可 2㈣在圖2所示的實施方式中’在支撐基板η :另-面上設置由光反射性電極構成的第二電極μ的延伸 單_，使其μ密封凹部15Α的斜面a，形成漫反射防止200423797 (1) Description of the invention: [Technical field to which the invention belongs] The present invention relates to an organic EL (Electroluminescence) panel and a method for manufacturing the same. [Prior art] Patent Document 1: Japanese Patent Application Laid-Open No. 8-321381 Patent Literature 2 Japanese Patent Application Laid-Open No. 9-127885 The organic EL panel has an organic EL element as a basic structure, and the organic eL element is used as a unit-plane light-emitting component. The organic EL element is formed by being arranged on a planar substrate. The organic EL element is formed by forming a first electrode on a supporting substrate, forming an organic layer including a light-emitting layer made of an organic compound thereon, and forming a second electrode thereon. of. In this organic EL element, one of the first electrode and the second electrode is made of a transparent electrode made of ITO or the like, and the other is made of a light-reflective metal electrode made of A1 or Mg. The transparent electrode side captures light emitted from the light emitting layer and the like. The following methods can be considered: · The first electrode on the transparent support substrate is made into a transparent electrode, and the bottom emission (bottom emission) method that obtains light from the support substrate side is made; the first electrode on the support substrate is made At the same time, the second electrode is made into a transparent electrode, and a top emission (top emission) method is adopted in which light is obtained from the second electrode side. In such an organic EL element, "for the light emitted from the light-emitting layer and the like to be efficiently emitted from the electrode side", the metal electrode disposed opposite to the transparent electrode is made to have a high reflectance so as to improve light emission brightness. However, since the metal electrode also becomes a highly reflective mirror for the light incident into the panel from the outside, and reflects the O: \ 92 \ 92640.DOC 5 200423797 light, the following ⑽ occurs: due to the external incident & In the non-light-emitting environment, the external scene is reflected, and when the light-emitting device is in a state where the contrast is lowered or the color cannot be displayed, the display performance is reduced. As an effective countermeasure against this problem, technical solutions described in Patent Documents i and 2 have been proposed. In this technical solution, an optical filter composed of a circular polarizer is placed on the light exit surface of the organic £ 1 panel. In this way, although the light incident from the outside and passing through the circular polarizer becomes right or left circularly polarized light, when the circularly polarized light is reflected by the metal electrode in the panel, the direction of the circularly polarized light is reversed. The light reflected by the metal electrode in the panel is cut off by the circular polarizer and cannot be emitted to the outside. On the other hand, it is known that the characteristics of the organic EL panel are deteriorated when the organic layer and the electrode are exposed to outside air. This is caused by the penetration of moisture into the interface between the organic layer and the electrode, which prevents electron injection, generates non-light-emitting areas, or causes electrode corrosion. In order to improve the stability and durability of the organic EL element, the organic EL element is shielded from outside air. Sealing technology is essential. As for this sealing technology, the following methods are generally used: A sealing member covering the electrodes and the organic layer is bonded to the supporting substrate on which the electrodes and the organic layer are formed with an adhesive. FIG. 1 is an explanatory diagram showing a conventional organic EL panel having a sealing member. In the organic EL panel 1, an organic EL element in which a first electrode 3 made of a transparent electrode, an organic layer 4 including a light-emitting layer, and a second electrode 5 made of a metal electrode is laminated is formed on one surface of a support substrate 2. The organic el element is sealed by a sealing member 7 which is drilled on one side of the base plate 2 of the building via a drilling agent 6. An optical filter 8 composed of the aforementioned circularly polarized O: \ 92 \ 92640 DOC 5 200423797 sheet is provided on the other surface of the support substrate 2. Here, 'a glass substrate is often used as a gift and sealing member 7, and a flat glass substrate may be pasted with a drilling agent 6 including a spacer, but generally shown in FIG. 1' is formed on one side of your sealing member 7. The second seal ′ formed by the seal recesses is provided with a desiccant 9 on the bottom surface of the 5H fork seal recess 7A. Such a seal recess 7A is generally formed by sandblasting with an abrasive material or using a chemical solution to perform an after-treatment. However, in this method, the inclined surface a of the seal recess 7A becomes a rough surface, and a diffuser is formed there. Reflector. In such a conventional organic EL element, when the light Lqi from the outside enters the panel through the optical filter 8, it becomes circularly polarized light L2 in the right or left direction. After the electrode 5 is specularly reflected, it becomes circularly polarized light L03 in the opposite direction. Therefore, as described above, the light incident from the outside and reflected by the second electrode 5 is cut off by the optical filter 8 and cannot be emitted to the outside. However, as described above, if a diffuse reflection portion is formed in the panel, even if the light L11 from the outside is incident into the panel through the optical filter 8 and becomes circularly polarized light L! 2 in the right or left direction, The diffuse reflection part reflects light Lu with a disordered polarization plane, so the reflected light L! 4 passing through the optical filter 8 is generated, and a part where the optical filter 8 cannot function effectively is locally generated. Therefore, the following problems occur: reflected light is emitted from the peripheral portion of the panel or the like at the time of light emission, resulting in a decrease in contrast, and at the time of non-light emission, a phenomenon in which external scenery is reflected causes deterioration of display performance. SUMMARY OF THE INVENTION The present invention has made it a subject to solve such a problem. That is, an object of the present invention is to prevent display performance from being deteriorated due to external incident light incident into the panel being reflected by the O: \ 92 \ 92640.DOC 5 200423797 degree reflecting portion in the panel. To achieve the above object, the present invention has at least the following configurations. — An organic EL panel in which an optical filter composed of a circular polarizer is provided on one side of a supporting substrate, and an organic EL element is formed on the other side of the supporting substrate. The organic EL element has a first electrode and a second electrode. An electrode and an organic layer sandwiched between the first and second electrodes, at least one of the first electrode and the second electrode is made of a transparent electrode, and the organic layer contains at least a light-emitting layer A sealing member for forming a branch sealing recess for sealing the organic EL element is provided, and is provided with a diffuse reflection preventing unit that prevents external incident light incident into the panel from being reflected by the diffuse reflection section in the panel. An organic EL panel manufacturing method, an optical filter composed of a circular polarizer is provided on one surface of a support substrate, and an organic EL element is formed on the other surface of the support substrate. The organic el element has a first electrode and Second: an electrode and an organic layer sandwiched between the first and second electrodes, at least one of the first electrode and the second electrode is made of a transparent electrode, the organic layer includes at least a light emitting layer, and the other surface A sealing member formed with a sealing recess for sealing the organic EL element is pasted, and is provided with a diffuse reflection preventing unit for preventing external incident light incident into the panel from being reflected by the diffuse reflection section in the panel. [Embodiment] The following describes the embodiment of the present invention. FIG. 2 is an explanatory diagram showing an organic EL panel according to the Guanyuan method of the present month. First, the basic structure of the organic iris panel 1G according to the embodiment of the present invention will be described. An optical filter 18 made of a circular polarizing plate is provided on one side of the supporting substrate 11 of O: \ 92 \ 92640 DOC 5 200423797. An organic EL element is formed on the other surface of the supporting substrate 11, and the EL element has a first electrode 12 and a second electrode 14 and an organic layer 13 sandwiched between the first and second electrodes. At least one of the first electrode 12 and the second electrode 14 is made of a transparent electrode. The organic layer 3 contains at least a light-emitting layer. The sealing member 15 formed with a sealing recess 15A for sealing the organic el element is formed with a desiccant 16. It is stuck on the other surface of the support substrate 11. In the embodiment shown below, the bottom substrate is a light emitting system whose side is the light exit surface as an example, but the present invention is not limited to this. A desiccant 17 is mounted on the bottom surface of the sealing recessed portion 15A formed in the sealing member 15. The slope & of the sealing recessed portion 15A is rough and forms a diffuse reflection. The Rishou Tingting diffuse reflection part is not only formed by the slope & it is formed in the panel during various formation processes. Each of the following embodiments includes a diffuse reflection preventing unit that prevents external incident light incident into the panel from being reflected by such a diffuse reflection portion. In this way, no external light is reflected by the diffuse reflection portion and emitted through the optical filter. In this case, the function of the optical filter 18 can be ensured on the entire surface of the support substrate, and the display performance of the organic rainbow panel can be prevented from being deteriorated. under. The characteristics of each bezier method. In the following description, a diffuse reflection portion formed by an oblique-shape is used as an example, but other diffuse reflection portions may also be used. In the embodiment shown in FIG. 2, 'the supporting substrate η is provided on the other surface. The extension electrode of the second electrode μ formed by the reflective electrode makes it μ seal the inclined surface a of the recessed portion 15A to prevent diffuse reflection.
〇 \92\92640 DOC -10- 200423797 在圖2的實施方式中，設置了第二電極“的延伸部，也 可以設置由透明電極構成的第一電極12的延伸部，併在—其 表面上層疊光反射性材料。 二、 根據k些貫施方式’來自外部的光^通過光學渡波器^ 入射到面板内而成為右或左方向的圓偏振光^2,但不會到 達由斜面a形成的漫反射部，而是全部被第二電卵等的反 射面反射。因此，圓偏振光Ευ通過被第二電極14等的反射 面反射而成為反方向的圓偏振光L23，纟於其被光學渡波器 1 8截止，所以反射光不會射出到外部。 圖3是表示本發明的另一實施方式涉及的有機el面板的 說明圖。對相同部分賦予相同符號，省略重覆部分的說明 。該實施方式涉及的有機EL面板2〇的基本結搆和前述的有 機EL元件1〇相同，但作為漫反射防止單元，通過使斜面& 不朝向光射出側來根本性地解決問題。即，為了使密封凹 部15A的斜面a不朝向支撐基板丨丨側，在密封凹部i5A的底 面上形成切口部1 5B，由此使斜面3和底面的夹角不是直角 而是銳角。 這樣，來自外部的光Lw也通過光學濾波器18入射到面板 内而成為右或左方向的圓偏振光[η，但它不會被由斜面a 形成的及反射部反射，而是被密封凹部1 5 A的底面或第二電 極14的反射面反射。因此’圓偏振光l 3 2通過被密封凹部1 5 a 的底面等反射而成為反方向的圓偏振光Ln，由於其被光學 濾波器1 8截止，所以反射光不會射出到外部。 圖4是表示本發明的再一實施方式涉及的有機el面板的 O:\92\92640 DOC 5 -11 - 200423797 說明圖。對相同部分賦予相同符號，省略重覆部分的說明 。該實施方式涉及的有機EL面板30的基本結搆和前述的有 機EL元件1 〇、20相同，但作為漫反射防止單元，通過在與 由斜面a形成的漫反射部相對的支撐基板丨丨的表面上形成 遮光部3 1來更根本地解決問題。即，設置遮光部3 1使來自 外部的光不朝向密封凹部15A的斜面a入射，這樣，來自外 部的光也不會通過光學濾波器丨8入射到面板内而到達由斜 面a形成的漫反射部，面板内部的漫反射光不會射出到外部 。遮光部3 1可以用密封材料形成，使用著色成光吸收性顏 色的部件’但優選的是利用可以均勻吸收可見光區域的所 有波長的近黑色或近灰色等來形成。 下面說明這種有機EL元件1〇、20、30的製造方法。首先 ’作為元件形成工序，在支撐基板U上形成層疊了第一電 極12、有機層13 '第二電極14的有機EL元件，形成在一對 電極之間夾著至少含有發光層的有機層13的有機El元件。 此處，有機EL元件12的形成中採用一般採用的眾所週知的 成膜工序和圖案形成工序。此外，另一方面，通過對密封 部件15進行噴砂處理或蝕刻處理等來形成密封凹部15A，在 5玄搶封凹部1 5 A的底面上安裝乾燥劑17。然後，利用粘接劑 16把密封部件15粘貼在支撐基板丨丨上，形成面板。 在這樣的製造工序中，在圖2所示的實施方式中，在元件 形成工序中的成膜第二電極14的工序，形成前述的延伸部 14A(在第一電極12上設置延伸部的情況下，在形成第一電 極12時形成延伸部），在圖3所示的實施方式中，在密封部 O:\92\92640 DOC 5 -12- 200423797 件1 5的形成工序’在加工岔封凹部1 5 A時形成前述的切口部 15B。而在圖4所示的實施方式中，在支撐基板11的形成_工 序或最終的粘貼工序之後，在支撐基板11的表面上形成前 述的遮光部3 1。 下面，更具體地說明前述的有機EL面板1〇、20、30的各 構成部件及面板製造方法。 (a)支撐基板 作為支撐基板11，優選具有透明性的平板狀或薄膜狀物 品，材質可以用玻璃或塑料等。 (b) 光學濾波器 作為光學濾、波器1 8的一例，由線偏振片和1 /4 (偏振片構成 ，1/4(偏振片是通過粘貼多個雙折射板形成的，以便在寬的 波長範圍内獲得1/4波長的相位差。而且，通過使1/4(偏振 片具有相對於線偏振片的偏光軸成45度或與其同等的交叉 角的偏光軸，使來自外部的入射光通過該光學濾波器丨8成 為右或左圓偏振光。 (c) 電極 以從支#基板11側射出光的方式（底部發光方式）為前提 的情況下，可以把第一電極12制成由透明電極構成的陽極 ’把第二電極14制成由光反射性金屬電極構成的陰極，但 基本上把哪方設為陽極或陰極都沒有關係（陽極使用功函 數比陰極高的材料來構成）。 作為適用的陽極材料，可以使用氧化銦（Ιη2〇3)、ιτ〇、ιζ〇 等的透明電極、功函數比陰極高的Cr、M〇、等金屬 O:\92\92640.DOC 5 -13- 200423797 膜，通過蒸鍍、濺射等成膜方法來形成。 作為陰極，使用功函數小的金屬、金屬氧化物、金屬_氣 化物、合金等，具體來講可以使用A卜In、Mg等的單層結 構、Ll〇2/A1等的層疊結構，用蒸鍍、濺射等成膜方法來形 成。另外’除金屬夕卜還可以使用已換雜的聚苯胺或已摻 雜的聚苯乙块等非晶質半導體、Cr2〇3、Ni〇、Mn2〇5等氧 化物。第-、第二電極均由透明材料形成的情況下，也可 以形成在與光射出側相反的電極側設置反射膜的結構。 在把第二電極14制成光反射性電極，用它形成延伸部“A 的情況下，由於要利用該延伸部14A反射外部光（白色光）， 所.以最好使用不帶顏色的反射整個可見光區域的銀色膜。 一而在把第-電極12制成透明電極’用它形成延伸部(未圖 不)的情況下’可以在延伸部上層疊Cr等銀色膜來形成反射 面0 (d)有機層 在、第包極12為陽極、以第二電極丨4為陰極的情況下 有機層13般疋空穴傳輸層/發光層/電子傳輸層的層疊結 ，’但也可以設置各自不只一層的多層層疊的發光層、空 八傳輸層、電子傳輪層，還可以省略空穴傳輸層、電子傳 輸層中的其中一層，也可以兩層均省略只設發光層。此外 ’作為有機層13，可以根據用途插入空穴注入層、電子注 入層、空穴阻擋層、電子阻擋層等有機功能層。 有機層13的材料可以根據有機EL元件的用途進行適當選 擇0以下列舉出示例，但不限定於此。 田、 O:\92\92640.DOC 5 -14- 200423797 作為空穴傳輸層，只要具有空穴遷移率高的性能即可， 其材料可以選擇使用以往公知的化合物中的任意物質。」乍 為具體示例，可以使用銅酞菁藍等血卟啉化合物、4,4，一雙 (1—萘基）一N—苯氨基]〜聯苯（NPB)等芳香族叔胺、4 —(二+對甲苯氨基）—4’— [4一（二對甲苯氨基）苯乙烯基] 一苯乙烯等二苯乙烯化合物、或三唑衍生物、苯乙烯基胺 化合物等有機材料。另外，也可以使用聚碳酸酯等高分子 中分散有低分子的空穴傳輸用有機材料的高分子分散類材 料。 發光層可以使用公知的發光材料，作為具體示例，可以 使用4,4, 一雙（2,2，—聯苯基乙烯基）—聯苯（DpvBi)等芳香 族二次甲基化合物、M—雙（2—甲基苯乙稀基）苯等苯乙稀 苯化合物、3 — (4_聯苯基）—4_苯基—5—叔丁苯基一 1，2,4_三唑（TAZ)等三唑衍生物、蒽醌衍生物、苟嗣衍生物 等熒光性有機材料、（8—羥基喹啉）鋁絡合物（八1^3)等熒光 性有機金屬化合物、聚對苯乙炔（ppv)類、聚苟（求"7小 才卜 >)類、聚乙烯味嗤（PVK)類等高分子材料、白金絡合物 或银絡合物等可用於從三態激子中發出燐光的有機材料（特 表2001 - 520450)。發光層既可以是僅由上述的發光材料構 成，也可以含有空穴傳輸材料、電子傳輸材料、％加劑（供 體、受體等)或發光性摻雜物等。另外，也可以將牠們分散 在高分子材料或無機材料中。 電子傳輸層只要具有把由陰極注入的電子傳遞到發光層 的功能即可’其材料可以選擇使用以往公知的化合物中的 O:\92\92640 DOC 5 -15- 200423797 任意物質。作為具體示例’可以使用硝基取代的芴酮衍生 物、蒽金雞納甲烷衍生物等有機材料、8 一羥基啥琳衍生物 的金屬絡合物、金屬酞菁藍等。 上述的空穴傳輸層、發光層、電子傳輸層可以用旋轉塗 覆法、浸潰法等塗覆法、噴射法、絲網印刷法等印刷法的 濕式工藝、或蒸鍍法、激光轉印法等的干式工藝來形成。 (e)密封部件 密封部件15的材質無特別限制，但優選由玻璃形成。對 應形成於支撐基板11上的有機EL元件的排列（有機eL元件 可以是單個也可以是多個），在密封部件丨5上形成密封凹部 15A。也可以在該密封凹部15A中形成裝填乾燥劑的凹部 (pocket部）的兩級凹入型。 對玻璃制平板來說，密封凹部15A的形成是通過進行衝壓 、蝕刻、喷砂處理等加工而形成的，對樹脂制平板來說， 检封凹部15A的形成是通過模塑成型等而形成的。 作為前述的漫反射部的一例，通過加工密封凹部丨5 A來形 成。例如，在進行喷砂處理的情況下，在密封部件15上形 成干式薄膜抗蝕劑（DFR)，利用光掩模掩蓋密封凹部15八形 成部，向密封凹部15A以外的部分照射11¥光，對DFR進行 *光顯影處理。然後，利用研磨材料進行喷砂處理，形 成也、封凹部15A，但由於密封凹部15A的斜面a的表面變成 了粗糙面，所以在面板内部形成了漫反射部。另外，在進 仃濕式蝕刻處理的情況下，通過前述的DFR的曝光、顯影 處理，形成密封凹部15A開口的抗蝕劑圖案。之後，利用藥 O:\92\92640.DOC 5 -16- 200423797〇 \ 92 \ 92640 DOC -10- 200423797 In the embodiment of FIG. 2, an extension portion of the second electrode “is provided, and an extension portion of the first electrode 12 composed of a transparent electrode may also be provided, and on the surface thereof Laminated light-reflective materials. 2. According to some implementation methods, 'light from the outside ^ is incident into the panel and becomes circularly polarized light in the right or left direction ^ 2, but does not reach the surface formed by the bevel a The diffusely reflecting portion is completely reflected by the reflecting surface of the second electric egg and the like. Therefore, the circularly polarized light υ is reflected by the reflecting surface of the second electrode 14 and the like and becomes circularly polarized light L23 in the opposite direction. The optical wave transformer 18 is turned off, so that the reflected light is not emitted to the outside. FIG. 3 is an explanatory diagram showing an organic el panel according to another embodiment of the present invention. The same reference numerals are given to the same portions, and the description of the repeated portions is omitted. The basic structure of the organic EL panel 20 according to this embodiment is the same as that of the organic EL element 10 described above, but as a diffuse reflection preventing unit, the problem is solved fundamentally by making the slope & not face the light exit side. That is, In order to prevent the inclined surface a of the sealing recessed portion 15A from facing the support substrate, a cutout portion 15B is formed on the bottom surface of the sealing recessed portion i5A, so that the angle between the inclined surface 3 and the bottom surface is not a right angle but an acute angle. The light Lw is also incident into the panel through the optical filter 18 and becomes circularly polarized light [η in the right or left direction, but it is not reflected by the reflective surface formed by the inclined surface a, but by the bottom surface of the sealed recess 1 5 A. Or the reflection surface of the second electrode 14. Therefore, the 'circularly polarized light l 3 2 is reflected by the bottom surface of the sealed recess 1 5 a and the like and becomes the circularly polarized light Ln in the opposite direction, because it is cut off by the optical filter 18 The reflected light is not emitted to the outside. FIG. 4 is an explanatory diagram of O: \ 92 \ 92640 DOC 5 -11-200423797 showing an organic el panel according to still another embodiment of the present invention. The same reference numerals are given to the same parts, and repeated descriptions are omitted. The basic structure of the organic EL panel 30 according to this embodiment is the same as that of the organic EL elements 10 and 20 described above, but as a diffuse reflection preventing unit, it is supported by the diffuse reflection portion formed by the inclined surface a. A light-shielding portion 31 is formed on the surface of the plate to solve the problem more fundamentally. That is, the light-shielding portion 31 is provided so that the light from the outside does not enter the inclined surface a of the sealing recess 15A, so that the light from the outside will not pass through. The optical filter 丨 8 is incident into the panel and reaches the diffuse reflection part formed by the inclined surface a, and the diffuse reflection light inside the panel will not be emitted to the outside. The light shielding part 31 can be formed with a sealing material. The component is preferably formed using near black, near gray, etc. that can uniformly absorb all wavelengths in the visible light region. A method for manufacturing such organic EL elements 10, 20, and 30 will be described below. First, as an element formation process, an organic EL element in which a first electrode 12 and an organic layer 13 are stacked on a support substrate U is formed. A second electrode 14 is formed as an organic EL element, and an organic layer 13 including at least a light-emitting layer is formed between a pair of electrodes. Organic El Element. Here, the organic EL element 12 is formed using a well-known film-forming step and a pattern-forming step that are generally used. On the other hand, the sealing recessed portion 15A is formed by sandblasting or etching the sealing member 15, and a desiccant 17 is mounted on the bottom surface of the sealing recessed portion 15A. Then, the sealing member 15 is adhered to the support substrate 丨 丨 with the adhesive 16 to form a panel. In such a manufacturing process, in the embodiment shown in FIG. 2, in the step of forming the second electrode 14 in the element formation process, the aforementioned extension portion 14A is formed (in the case where the extension portion is provided on the first electrode 12). Next, an extension is formed when the first electrode 12 is formed). In the embodiment shown in FIG. 3, in the sealing portion O: \ 92 \ 92640 DOC 5 -12- 200423797, the process of forming the piece 15 is performed in the process of sealing. In the recessed portion 15 A, the aforementioned notched portion 15B is formed. In the embodiment shown in FIG. 4, the aforementioned light-shielding portion 31 is formed on the surface of the support substrate 11 after the formation step of the support substrate 11 or the final pasting step. Hereinafter, the constituent components of the organic EL panels 10, 20, and 30 and the method for manufacturing the panels will be described more specifically. (a) Support substrate The support substrate 11 is preferably a flat plate-shaped or film-shaped article having transparency, and the material can be glass or plastic. (b) An optical filter is an example of an optical filter and a wave filter 18. It is composed of a linear polarizer and a 1/4 (polarizer, 1/4 (polarizer is formed by pasting a plurality of birefringent plates so that A phase difference of 1/4 wavelength is obtained in the wavelength range of. In addition, by making a 1/4 (polarizer having a polarization axis of 45 degrees with respect to the polarization axis of the linear polarizer or a cross angle equivalent thereto, the external incidence Light passes through the optical filter and becomes right or left circularly polarized light. (C) The first electrode 12 can be made with the premise that the electrode emits light from the substrate 11 side (bottom emission method). Anode made of transparent electrode 'Makes the second electrode 14 a cathode made of a light-reflective metal electrode, but it basically does not matter which one is used as the anode or the cathode (the anode is made of a material with a higher work function than the cathode ). As a suitable anode material, transparent electrodes such as indium oxide (Ιη2〇3), ιτ〇, ιζ〇, Cr, M〇, and other metals with higher work functions than the cathode O: \ 92 \ 92640.DOC 5 -13- 200423797 film, formed by evaporation, sputtering, etc. As the cathode, metals, metal oxides, metal_gases, alloys, etc. with a small work function are used. Specifically, a single-layer structure such as Al, In, Mg, or L102 / A1 can be used. The structure is formed by a film-forming method such as evaporation or sputtering. In addition, in addition to metal, amorphous semiconductors such as polyaniline or doped polystyrene blocks, Cr203, Ni can also be used. Oxides such as 〇, Mn205, etc. When both the first and second electrodes are formed of a transparent material, a structure in which a reflective film is provided on the electrode side opposite to the light emission side may be formed. The second electrode 14 is made When a light-reflective electrode is used to form the extension "A", since the extension 14A is used to reflect external light (white light), it is best to use a silver film that reflects the entire visible light region without color. In the case where the first electrode 12 is made into a transparent electrode, and when it is used to form an extension (not shown), a silver film such as Cr can be laminated on the extension to form a reflective surface. 0 (d) Organic layer When the electrode 12 is the anode and the second electrode 4 is the cathode The lower organic layer 13 is a layered junction of a hole transporting layer / light emitting layer / electron transporting layer, but it is also possible to provide a multilayer light emitting layer, an empty transport layer, and an electron transfer layer, each having more than one layer. One of the hole-transporting layer and the electron-transporting layer, or both layers may be omitted and only the light-emitting layer may be omitted. In addition, as the organic layer 13, a hole injection layer, an electron injection layer, a hole blocking layer, and an electron blocking layer may be inserted according to the application. Organic functional layers such as layers. The material of the organic layer 13 can be appropriately selected according to the application of the organic EL element. The following examples are given, but are not limited to this. Tian, O: \ 92 \ 92640.DOC 5 -14- 200423797 as empty The hole-transporting layer may be any material as long as it has a high hole mobility, and any of the materials may be selected from conventionally known compounds. For specific examples, hematoporphyrin compounds such as copper phthalocyanine blue, 4,4, bis (1-naphthyl) -N-phenylamino] ~ aromatic tertiary amines such as biphenyl (NPB), 4- (Di + p-tolylamino) -4 '-[4-mono (di-p-tolylamino) styryl] Stilbene compounds such as styrene, or organic materials such as triazole derivatives and styrylamine compounds. Alternatively, a polymer-dispersed material in which a low-molecular hole-transporting organic material is dispersed in a polymer such as polycarbonate may be used. A known light-emitting material can be used as the light-emitting layer. As a specific example, an aromatic secondary methyl compound such as 4,4, bis (2,2, -biphenylvinyl) -biphenyl (DpvBi), and M- Styrene compounds such as bis (2-methylphenylethenyl) benzene, 3- (4-biphenyl) -4-phenyl-5-tert-butylphenyl-1,2,4_triazole ( TAZ) and other fluorescent organic materials such as triazole derivatives, anthraquinone derivatives, and pyrene derivatives; (8-hydroxyquinoline) aluminum complexes (eight 1 ^ 3); and other fluorescent organic metal compounds and poly-p-benzene Polymer materials such as acetylene (ppv), polygo (see "7 Xiaocaibu"), polyethylene miso (PVK), platinum complexes, or silver complexes can be used to Luminescent organic materials in the son (Special Table 2001-520450). The light-emitting layer may be composed of only the above-mentioned light-emitting material, or may contain a hole-transporting material, an electron-transporting material, a dopant (donor, acceptor, etc.), a light-emitting dopant, or the like. Alternatively, they may be dispersed in a polymer material or an inorganic material. As long as the electron transport layer has a function of transmitting electrons injected from the cathode to the light-emitting layer, the material of the electron transport layer can be selected from any of the conventionally known compounds: O: \ 92 \ 92640 DOC 5 -15- 200423797. As specific examples, organic materials such as nitro-substituted fluorenone derivatives, anthracene cinchona methane derivatives, metal complexes of 8-hydroxysalin derivatives, metal phthalocyanine blue, and the like can be used. The hole transporting layer, light emitting layer, and electron transporting layer described above can be applied by a spin coating method, a wet coating process such as a dipping method, a spraying method, a screen printing method such as a screen printing method, a vapor deposition method, or a laser transfer method. It is formed by a dry process such as printing. (e) Sealing member The material of the sealing member 15 is not particularly limited, but it is preferably formed of glass. Corresponding to the arrangement of the organic EL elements formed on the support substrate 11 (the organic eL elements may be single or plural), a sealing recess 15A is formed in the sealing member 5. A two-stage recessed type of a recessed portion (pocket portion) in which the desiccant is filled may be formed in the sealing recessed portion 15A. For a glass flat plate, the formation of the sealing recessed portion 15A is formed by processing such as stamping, etching, and sandblasting. For a resin flat plate, the formation of the seal recessed portion 15A is formed by molding or the like. . As an example of the aforementioned diffuse reflection portion, a seal recess 5A is formed by processing. For example, in the case of a sandblasting process, a dry film resist (DFR) is formed on the sealing member 15, a seal mask 15 is formed with a photomask, and a portion other than the seal recess 15A is irradiated with light. , The DFR is subjected to a photo development process. Then, the abrasive material was subjected to sandblasting to form a recessed portion 15A. However, since the surface of the inclined surface a of the sealed recessed portion 15A became a rough surface, a diffuse reflection portion was formed inside the panel. When a wet etching process is performed, a resist pattern that seals the opening of the recessed portion 15A is formed by the aforementioned DFR exposure and development processes. After that, the medicine O: \ 92 \ 92640.DOC 5 -16- 200423797
液氟-文進行餘刻，形成密封凹部1 5 A，但由於密封凹部1 $ A 的斜面a附近的底部表面因藥液而成為粗糙面，所以形成前 述的漫反射部。 作為女裝在密封凹部15A的底面上的乾燥劑17，可以使用 I:下乾燥劑來形成··沸石、硅膠、碳、碳納米管等物理乾 燥劑；鹼金屬氧化物、金屬鹵化物、㉟氧化氯等化學乾燥 劑，在甲苯、二甲苯、脂肪族有機溶劑等石油類溶劑中溶 解了有機金屬絡合物的乾燥劑；把這些乾燥劑顆粒分散在 具有透明性的聚乙烯、聚異戊二烯、聚肉娃酸乙婦醋（求I) 匕一小シy十工一卜）等枯合劑中的乾燥劑等。 ⑴钻接劑 粘接劑16使用熱固型、化學固化型（雙溶劑混合）、光（紫 外線）固化型等枯接劑’其材料可以使用丙稀酸樹脂 '環氧 樹脂、聚酷、聚烯烴等。特別優選使用紫外線固化型環氧 樹脂。在這種枯接劑中混合適量（約〇1〜〇5重量％)的粒徑 為1〜100# m的隔離物（優選玻璃或塑料隔離物），使用配合 器等進行塗覆。 ^ (g)有機EL面板的各種方式 有機EL元件可以形成單一的有機EL元件，也可以具有所 需的圖案結構，構成多個象素。 而且，在後者的情況下，其顯示方式可以^色發光， 也可以是2色或多於2色的多色發光，特別是為了實現多色 發光的有機EL面板’可以用以下方式來構成：包含形成對 應RGB的3種發光功能層的方式的形成2色或多於？色的發 O:\92\92640.DOC 5 -17- 200423797 光功能層的方式(分塗方式)、將遽色器或由癸光材料形成的 色變換層組合到白色或藍色等單色發光功能層的方式哎 方式、CCM方式）、通過向單色發光功能層的發光區域照射 電磁波等實現多色發光的方式（光致褪色方式）等。另外，有 機EL元件的驅動方式可以是無源驅動方式或有源驅動方式 中的任一種。 (h)製造方法 實施方式涉及的有機EL面板1〇、2G、3()是經過以下工序 製造而成的：在透明的平板玻璃制支撐基板Π上形成有機 仙元件的元件形成工序；密封部㈣的形成工序；利用枯 接劑16粘貼密封部件15和支撐基板u的密封工序。 以前述的無源驅動方式的面板製造為例，元件形成工序 在支撐基板u上將作為陽極的IT0等的第—電極12通過蒸 鍍、濺射等方法形成為薄膜，利用照相平版印刷法等形成 帶狀圖案。然| ’用旋轉塗覆法、浸潰法等塗覆法、噴射 法、絲網印刷法等印刷法等的濕式工藝、或蒸鍍法、激光 轉印法等的干式卫藝形成有機層。作為_個示例，通過基 ，依次層疊空穴傳輸層、發光層、電子傳輪層的各材料，、 最後形成作為陰極的帶狀第二電極14，使其與第一電極U 正交’由第-電極12和第二電極14形成矩陣。第二電極μ 是利用使用帶狀圖案的掩模的蒸鍍或濺射等方法形成的。 推封部件15的形成H在對麵制密封部件Η進行 衝壓成形、蝕刻、噴砂處理等加工形成密封凹部ΜΑ後，利 用枯接劑等使乾燥劑"附著在密封凹部15八的底面上，根據 O:\92\92640.DOC 5 -18- 200423797 情況用由彳、紙或合成樹脂構成的透氣性薄片覆蓋乾 17進行固定。 、月 密封工序是：例如在紫外線固化型環氧樹脂粘接劑M—中 混合^量（約〇·卜0.5重量％)的粒徑為Μ叫_隔離物 (優選玻璃或塑料隔離物），使用配合器等將其塗覆在支撐基 板11上對應於岔封部件丨5的粘接面的部位。然後，在氬氣 等惰性氣體氛圍下，通過粘接劑16使密封部件15和支撐基 板11對接。之後，從支撐基板Π側（或密封部件15側）向粘接 劑16照射紫外線，使其固化。這樣，以在密封部件Μ和支 撐基板11的密封空間内封入了氬氣等惰性氣體的狀態密封 有機EL元件。 根據這種實施方式的有機EL面板及其製造方法，入射到 面板内的外部入射光不會被面板内的漫反射部反射，所以 月匕夠在5又有光學濾波器18的整個面板面上發揮該濾波器的 的功能。因此，不會出現非發光時映出外界景色的不良情 況、發光時對比度降低或變成不能顯示黑色等狀態的不良 f月況，可以基本完全防止因外部入射光而造成的顯示性能 劣化。 【圖式簡單說明】 圖1是現有技術的說明圖。 圖2是說明本發明的實施方式涉及的有機el面板的說明 圖。 圖3是說明本發明的另一實施方式涉及的有機el面板的 說明圖。 O:\92\92640.DOC 5 -19- 200423797 圖_ 4是說明本發明的再一實施方式涉及的有機EL面板的說 明圖。 _ 【圖式代表符號說明】 10 有機EL面板 11 支撑基板 12 第一電極 13 有機層 14 第二電極 14A 延伸部 15 密封部件 15A 密封凹部 15B 切口部 16 粘接劑 17 乾燥劑 18 光學濾波器 O:\92\92640.DOC 5 -20-The liquid fluorine was left to form a sealing recessed portion 15 A, but the bottom surface near the inclined surface a of the sealed recessed portion 1 $ A became rough due to the chemical solution, so the aforementioned diffuse reflection portion was formed. As the desiccant 17 for the ladies' wear on the bottom surface of the sealing recess 15A, I: a lower desiccant can be used to form a physical desiccant such as zeolite, silica gel, carbon, carbon nanotubes; alkali metal oxides, metal halides,化学 Chemical desiccants such as chlorine oxide, desiccants in which organometallic complexes are dissolved in petroleum solvents such as toluene, xylene, and aliphatic organic solvents; these desiccant particles are dispersed in transparent polyethylene and polyisocyanate. Desiccants in cumene mixtures such as pentadiene, ethyl polymethyl vinegar (seeking I), etc. ⑴Drill joint adhesive 16 uses thermosetting, chemical curing (dual-solvent mixing), light (ultraviolet) curing and other drying agents 'the material can be acrylic resin' epoxy resin, polycool, poly Olefins, etc. It is particularly preferable to use an ultraviolet curable epoxy resin. An appropriate amount (approximately 0.001 to 5% by weight) of a separator (preferably glass or plastic separator) having a particle size of 1 to 100 m is mixed with this desiccant, and coated with a dispenser or the like. ^ (g) Various methods of organic EL panel The organic EL element can be formed into a single organic EL element, or it can have a desired pattern structure to form multiple pixels. Moreover, in the latter case, the display mode can be multi-color light emission, and it can also be multi-color light emission of two or more colors. In particular, an organic EL panel for realizing multi-color light emission can be configured in the following manner: The formation of two colors or more including the method of forming three kinds of light-emitting functional layers corresponding to RGB? O: \ 92 \ 92640.DOC 5 -17- 200423797 The method of optical function layer (split coating method), combining a color filter or a color conversion layer made of decant material into a single color such as white or blue (E.g., light-emitting functional layer method, CCM method), a method for achieving multi-color light emission (photofading method) by irradiating electromagnetic light waves to the light-emitting area of a single-color light-emitting functional layer, and the like. The driving method of the organic EL element may be either a passive driving method or an active driving method. (h) The organic EL panels 10, 2G, and 3 () according to the embodiment of the manufacturing method are manufactured through the following steps: an element forming step of forming an organic fairy element on a transparent flat glass support substrate Π; a sealing portion A step of forming ytterbium; a sealing step of attaching the sealing member 15 and the support substrate u with a dry adhesive 16. Taking the aforementioned passive-drive panel manufacturing as an example, the element forming process forms the first electrode 12 such as IT0 on the supporting substrate u into a thin film by a method such as evaporation and sputtering, and uses a photolithography method. Form a stripe pattern. RAN | 'Organization by dry coating methods such as spin coating method, dip coating method, spray method, printing method such as screen printing method, or dry cleaning technology such as vapor deposition method, laser transfer method, etc. Floor. As an example, each material of the hole transport layer, the light emitting layer, and the electron transfer layer is sequentially stacked through the base, and finally a strip-shaped second electrode 14 as a cathode is formed so as to be orthogonal to the first electrode U. The first-electrode 12 and the second electrode 14 form a matrix. The second electrode μ is formed by a method such as evaporation or sputtering using a mask having a stripe pattern. Formation of the sealing member 15 After the sealing member 面 on the surface is subjected to stamping, etching, sand blasting and other processing to form the sealing recess MA, a desiccant is adhered to the bottom surface of the sealing recess 15 with a desiccant or the like. O: \ 92 \ 92640.DOC 5 -18- 200423797 For the case, cover the stem 17 with a breathable sheet made of paper, paper or synthetic resin for fixing. The monthly sealing process is, for example, mixing the ultraviolet curable epoxy resin adhesive M- with a particle size (about 0. 0.5% by weight) of a particle size M called a separator (preferably a glass or plastic separator), This is applied to a portion of the support substrate 11 corresponding to the bonding surface of the bifurcated sealing member 5 using a matching device or the like. Then, the sealing member 15 and the support substrate 11 are brought into abutment with each other under the atmosphere of an inert gas such as argon by the adhesive 16. Thereafter, the adhesive 16 is irradiated with ultraviolet rays from the support substrate Π side (or the sealing member 15 side) to be cured. In this way, the organic EL element is sealed in a state where an inert gas such as argon gas is sealed in the sealed space of the sealing member M and the support substrate 11. According to the organic EL panel and the manufacturing method thereof according to this embodiment, the external incident light incident into the panel is not reflected by the diffuse reflection portion in the panel, so that the moon is enough to cover the entire panel surface with the optical filter 18 Play the function of this filter. Therefore, there will be no adverse conditions such as reflecting the external scene when non-emissive, a negative f-conditions such as a decrease in contrast during light emission, or a state where black cannot be displayed, and the display performance deterioration due to external incident light can be basically prevented completely. [Brief Description of the Drawings] FIG. 1 is an explanatory diagram of the prior art. Fig. 2 is an explanatory diagram illustrating an organic el panel according to an embodiment of the present invention. FIG. 3 is an explanatory diagram illustrating an organic el panel according to another embodiment of the present invention. O: \ 92 \ 92640.DOC 5 -19- 200423797 Fig. 4 is an explanatory diagram illustrating an organic EL panel according to still another embodiment of the present invention. _ [Description of Symbols] 10 Organic EL panel 11 Support substrate 12 First electrode 13 Organic layer 14 Second electrode 14A Extension 15 Sealing member 15A Sealing recess 15B Notch 16 Adhesive 17 Desiccant 18 Optical filter O : \ 92 \ 92640.DOC 5 -20-