1224762 案號 92123549 年 月__g__修正 五、發明說明（1) 發明所屬之技術領域 本發明有關於一種有機發光顯示器之構造，特別有關 於一種在頂端具有光散射層之有機發光顯示器之構造。 先前技術 習知的有機發光顯示元件之構造如美國專利63 660 1 7 號所揭露者，如第3圖所示，其中在基材1〇上方依序形成 1% 極（anode) 12、導電層（conducti ve layer)13 、電洞 傳遞層（hole transport layer)14、電子傳遞層/發光層 (electron transport layer/emissive layer)16 、電子 發射層（electron injection layer)18以及透明導電層 (transparent conducting layer)20。發光層 16 產生光線 後’部分光線會穿過透明導電層2 〇而從正面照射出來，部 分光線在内部會有全反射、吸收因素，使整體的透光量減 少’導致元件效率變差，即外部量子效率（external quantum ef f ici ency)變差。為了解決此一問題，於是在 透明導電層20的上方形成一分散式布拉格反射層 (Distributed Bragg Reflector， DBR) 26 ，其作用是改 變元件外部折射率，以減少内部全反射的光，以增加元件 效率’即增加外部量子效率（external quant· efficiency)，並於正面獲得較大的光量，增加畫面的亮 度0 但是在此結構下，又由於分散式布拉格反射層26會使 光線集中於某個角度，而因為長波長的光與短波長的光之 折射率不同’因此在不同觀察角度下，各種波長的光的分 佈也會不同，因此產生色位移（c〇丨〇r shift)的問題，為 1224762 --—— 案號92123549_年月日 修正__ 五、發明說明（2) 了解決此一問題，必須要使經由分散式布拉格反射層匯 的光線再做均勻地散射，而降低從不同角度所觀察到的 位移（color shi f t )。 發明内容 聚 色 有鑑於此，本發明之目的在於使經由布拉格反射層 集後的光線可以均勻地散射，而減少使用者在任何視角 察到晝面的色位移（color shift)。 為了達成上述之目的，本發明提供一種具有光散射 之有機發光顯示器之構造，上述之光散射層形成於布拉 反射層的上方，可將由布拉格反射層匯聚後的光線做均 地散射，而能減少色位移的顯示器。 本發明之 基板上的一電 構，形成於該 於該透明導電 成於該分散式 本發明之 結構包括：形 電洞傳遞層之 層之上方的一 本發明之 可具有粗輪之 射光線），而 有機發光顯 極層，形成 有機發光結 層之上方的 布拉格反射 有機發光顯 示器構造包 於該電極層 構之上方的 一分散式布 層之上方的 示器之構造 成於電極層之上方的一 上方的一有機發光層， 電子傳遞層。 有機發光顯示器之構造 表面以均勻散射光線（ 光散射層之光折射率係 括一基板，形成方 上的一有機發光矣 一透明導電層， 拉格反射層，以i 一光散射層。 中’上述之有機赛 電洞傳遞層，形启 以及形成於有機每 中’上述之光散身 具有微透鏡構造C 大於1· 7且小於2.； 聚 觀 層 袼 勻 該 成 形 光 於 光 層 散1224762 Case No. 92123549 Month __g__ Amendment V. Description of the Invention (1) Field of the Invention The present invention relates to the structure of an organic light emitting display, and more particularly to the structure of an organic light emitting display having a light scattering layer on the top. The structure of the organic light-emitting display element known in the prior art is as disclosed in US Patent No. 63 660 17, as shown in FIG. 3, in which a 1% anode is sequentially formed on the substrate 10, and a conductive layer is formed. (Conducti ve layer) 13, hole transport layer 14, electron transport layer / emissive layer 16, electron injection layer 18, and transparent conducting layer layer) 20. After the light emitting layer 16 generates light, 'part of the light will pass through the transparent conductive layer 2 and be radiated from the front. Part of the light will have total reflection and absorption factors in the interior, which will reduce the overall light transmission', which will lead to poor element efficiency, ie The external quantum efficiency (external quantum ef f ici ency) becomes worse. In order to solve this problem, a distributed Bragg Reflector (DBR) 26 is formed on the transparent conductive layer 20, and its role is to change the external refractive index of the device to reduce the total internally reflected light to increase the device. 'Efficiency' is to increase external quantum efficiency, and obtain a larger amount of light on the front, increasing the brightness of the picture. However, in this structure, the scattered Bragg reflection layer 26 will focus the light at a certain angle. Because the refractive index of long-wavelength light is different from that of short-wavelength light, the distribution of light of various wavelengths will also be different at different observation angles, so the problem of color shift (c〇 丨 〇r shift) arises. 1224762 --—— Case No. 92123549_year, month, day, day, day, day, day, day, month, month, month, month, month, month, month, month, month, month, month, year, five, year, month, month, month, two, five, five. Explanation of the invention The observed displacement of the angle (color shi ft). SUMMARY OF THE INVENTION In view of this, the object of the present invention is to make the light collected through the Bragg reflection layer can be evenly scattered, and reduce the color shift of the daytime surface observed by the user at any viewing angle. In order to achieve the above object, the present invention provides a structure of an organic light emitting display with light scattering. The light scattering layer is formed above the Brah reflection layer, and can uniformly scatter the light condensed by the Bragg reflection layer. Display with reduced color shift. An electrical structure on the substrate of the present invention is formed on the transparent conductive formed in the dispersed structure. The structure of the present invention includes: a layer of a hole-shaped transmission layer of the present invention, which can have a thick round of light rays) The organic light-emitting display layer forms a Bragg-reflective organic light-emitting display structure above the organic light-emitting junction layer. The structure of the indicator above the electrode layer structure above a dispersed cloth layer is structured above the electrode layer. An organic light emitting layer and an electron transporting layer on top. The structure surface of the organic light-emitting display diffuses light uniformly (the light refractive index of the light-scattering layer includes a substrate, forming an organic light-emitting, transparent conductive layer, a rag reflection layer, and a light-scattering layer. The above-mentioned organic race hole transmission layer is shaped and formed in the organic structure. The above-mentioned light diffuser has a micro-lens structure C greater than 1 · 7 and less than 2 .;
第7頁 1224762Page 7 1224762
本發明之有機發光顯示器之構造中，亦可在上述之光 ηι摻雜微小之粒子以均勻散射光線，而光散射層之 ^ “係大於1. γ且小於2· 3，厚度則介於11()奈米與31〇 不；；之間，然所摻雜之粒子尺寸係介於1〇〇奈米與丨奈米 本發明之有機發光顯示器之構造中，上述之光散射層 所払雜之粒子之材質可為鋁、矽、鐵、鈦、鎢、二氧化 石夕、碳酸鈣、硫化鋅等。 本發明之有機發光顯示器之構造中，上述之光散射層 質係非溶劑型高分子材料，如環氧樹脂（epoxy )、 T、維素（cellulose )、常溫交聯硫化矽氧烷（R〇〇m jmperature Vulcanization silicon ，RTV-silicon) 寺 〇 本發明之有機發光顯示器之構造中，上述之光散射層 多‘之粒子濃度係介於0 · 4與2 · 0重量百分率濃度之間。 本發明之有機發光顯示器之構造中，上述之光散射層 係以濺鍍的方法製成。 本發明之有機發光顯示器之構造中，上述之基板亦可 使用一透明基板。 牛本發明之製造有機發光顯示器之構造的方法包括下列 二驟·在一有機發光結構的上方覆蓋一具多孔隙之遮罩； 療鍵適當的材料，使該有機發光結構上形成複數個小凸 塊’而使光線能均勻散射。 牛本發明之製造有機發光顯示器之構造的方法包括下列 .在-有機發光結構的上方形成一透明的高分子層；In the structure of the organic light-emitting display of the present invention, tiny particles can be doped in the light to uniformly scatter light, and the light scattering layer ^ "is greater than 1. γ and less than 2 · 3, and the thickness is between 11 () Nanometer and 31 ℃; between, but the doped particle size is between 100nm and nanometer. In the structure of the organic light-emitting display of the present invention, the above-mentioned light scattering layer is doped with The material of the particles can be aluminum, silicon, iron, titanium, tungsten, stone dioxide, calcium carbonate, zinc sulfide, etc. In the structure of the organic light-emitting display of the present invention, the light-scattering layer is a non-solvent polymer. Materials such as epoxy, T, cellulose, and room temperature crosslinked silicone sulfide (Rmmmperature Vulcanization silicon, RTV-silicon). In the structure of the organic light emitting display of the present invention, The particle concentration of the above light scattering layer is between 0.4% and 2.0% by weight. In the structure of the organic light emitting display of the present invention, the light scattering layer is made by a sputtering method. Organic light emitting display of the present invention In the structure of the display device, the above-mentioned substrate may also use a transparent substrate. The method for manufacturing an organic light-emitting display of the present invention includes the following two steps: • covering a porous mask over an organic light-emitting structure; An appropriate material for the bond causes a plurality of small bumps to be formed on the organic light-emitting structure so that light can be evenly scattered. The method for manufacturing the structure of the organic light-emitting display of the present invention includes the following. A transparent layer is formed above the organic light-emitting structure. Polymer layer
1224762 蓋正1224762 Gai Zheng
案號 9212354Q 五、發明說明（4) 在上=透明的高分子層中摻雜微小之粒子以散射光線。 :本發明巾’藉由在有機發光結構上形成粗糙表面或 =個：凸塊’或者是在有機發光結構的上方形成一透明 =冋/刀子層，亚在上述之透明層中摻雜微小粒子，可將由 布拉格反射層匯聚後的光線做均勻地散射， 限制的顯示器。 仲车』…、視角 =讓本發明之上述和其他目的、特徵、和優點能更 j，員易Μ，下文特舉-較佳實施例，i配合所附圖示，作 詳細說明如下。 貫施方式 第一實施例 夕接示’本發明第-實施例之有機發光顯示器 之構仏在基板s的上方依序形成電極層110、有機發光結 120、透明導電層13〇、分散式布拉格反射層14〇以及光散 射層150。其中有機發光結構12〇還包括一電子傳遞層 121，一有機發光層122以及一電洞傳遞層。 其中光散射層150可以蒸鍍的方式形成，先在分散式 布拉格反射層140的上方覆蓋一具多孔隙之遮罩，然後蒸 鍍適當的材料，使分散式布拉格反射層14〇上形成具有粗 糙之表面或小凸塊表面的光散射層丨5〇，而使光線能均勻 散射’如第1 b圖所示。此外亦可考慮以喷砂的方式使光散 射層1 5 0的表面粗糙化，但喷砂容易損傷其他元件。 粗糙表面對光線而言可視為許多小鏡面（微透鏡結 構），當由分散式布拉格反射層丨4〇所匯聚的光線照射至 小鏡面時會產生折射及反射’而使光線向四方散射，如第Case No. 9212354Q V. Description of the invention (4) The upper = transparent polymer layer is doped with tiny particles to scatter light. : The towel of the present invention 'by forming a rough surface or = bumps on the organic light-emitting structure' or forming a transparent = 冋 / knife layer on the organic light-emitting structure, sub-doped with small particles in the above-mentioned transparent layer It can limit the display by uniformly scattering the light collected by the Bragg reflection layer. "Zhongche" ..., angle of view = to make the above and other objects, features, and advantages of the present invention more convenient and easy to use. The following is a special embodiment-a preferred embodiment. The first embodiment is described in the implementation example of the structure of the organic light-emitting display according to the first embodiment of the present invention. An electrode layer 110, an organic light-emitting junction 120, a transparent conductive layer 13, and a dispersed Bragg are sequentially formed on the substrate s. The reflective layer 14 and the light scattering layer 150. The organic light emitting structure 120 also includes an electron transfer layer 121, an organic light emitting layer 122, and a hole transfer layer. The light scattering layer 150 can be formed by vapor deposition. First, a porous mask is covered on top of the dispersed Bragg reflection layer 140, and then a suitable material is evaporated to form a rough surface on the dispersed Bragg reflection layer 140. Light scattering layer on the surface of the surface or the surface of the small bumps, so that light can be evenly scattered 'as shown in Figure 1b. In addition, it is also possible to roughen the surface of the light diffusing layer 150 by sandblasting, but sandblasting may easily damage other components. The rough surface can be regarded as many small mirrors (micro-lens structure) for the light. When the light converged by the dispersed Bragg reflection layer 丨 4 is irradiated to the small mirror surface, it will cause refraction and reflection, and the light will be scattered in all directions. First
第9頁 1224762Page 9 1224762
lb圖所示。而散射層150的折射 内，若折射率太大，光線照射至革小必鏡頁面在時一容適易當的範〜圍 度太小，不易有散射的效果故身^太商^則光線折射角 150的折射率保持在大於κ 7且小於2 曰材枓而使散射層 第二實施例 ' · 如第2 a圖所示，本發明第-给—y丨 > 丄 之槿i / Ik e μ + 只施例之有機發光顯示器 ^構故在基板s的上方依序形成電極層21〇、有機發光結 20、透明導電層2 30、分散式布拉格反射層24〇以 二層25一0。其中有機發光結構22。還包括一電子傳遞層月 ，一有機發光層222以及一電洞傳遞層223。 光冑射層㈣彳α高分子材料藉由喷墨印刷的方 式形成於分散式布拉格反射層24〇的上方，同時在上述高 分子材料中摻雜複數個微小粒子252，以使光線能均勻的 散射，如第2b圖所示。 光散射層25 0的折射率如同第一實施例，考慮全反射 與折射角度的問題，故選擇折射率大於17且小於2·3的高 分子材料，如非溶劑型高分子材料環氧樹脂（ep〇xy )、 纖維素（cellulose)、常溫交聯硫化矽氧烷（R〇⑽ Temperature Vulcanizati〇n siUc〇n，RTV sUic〇n )等 而光政射層2 5 0的厚度，就考慮得到較佳的出光效率而 吕’對鈕波長的光（如藍光）約為波長的丨/4，對長波長 的光（如紅光）約為波長的1/2。藍光的波長約42〇ηιη，紅 光的波長約6 20nm，故本發明第二實施例之光散射層25〇的lb picture. In the refraction of the scattering layer 150, if the refractive index is too large, the light is irradiated to the page of the leather mirror. The range is too small and the scope is too small, so it is not easy to have a scattering effect. The refractive index of the refraction angle 150 is maintained to be greater than κ 7 and less than 2 °, so that the scattering layer is a second embodiment. As shown in FIG. 2a, the present invention provides -y—y 丨 > Ik e μ + The organic light-emitting display of the example only ^ The electrode layer 21, the organic light-emitting junction 20, the transparent conductive layer 2 30, and the dispersed Bragg reflection layer 24 are formed on the substrate s in order. 0. Organic light emitting structure 22. It also includes an electron transfer layer, an organic light emitting layer 222, and a hole transfer layer 223. The light emitting layer ㈣ 彳 α polymer material is formed over the dispersed Bragg reflective layer 24 by inkjet printing. At the same time, a plurality of fine particles 252 are doped in the polymer material to make the light uniform. Scattering, as shown in Figure 2b. The refractive index of the light-scattering layer 250 is the same as that of the first embodiment. Considering the problems of total reflection and refraction angle, a polymer material with a refractive index greater than 17 and less than 2 · 3, such as a non-solvent polymer epoxy resin ( ep〇xy), cellulose (cellulose), room temperature crosslinked silicone sulfide (R〇⑽ Temperature Vulcanizatión siUcón, RTV sUic〇n), etc., and the thickness of the light-emitting layer 2 50, consider to obtain a relatively small For light output efficiency, the wavelength of the light (such as blue light) is about 1/4 of the wavelength, and the light of long wavelength (such as red light) is about 1/2 of the wavelength. The wavelength of blue light is about 42 nm, and the wavelength of red light is about 6 20 nm. Therefore, the light scattering layer 25 of the second embodiment of the present invention
厚度設定在llOnm至310nm之間。微小粒子252可使用鋁、 第10頁 1224762The thickness is set between 110 nm and 310 nm. Fine particles 252 can use aluminum, page 10 1224762
— _案號 92123549 五、發明說明（6) 矽、鐵、鈦、鎢、二氧化矽、碳酸鈣、硫化鋅等材質，考 慮光線的牙透率在70%以上時’微小粒子2 5 2的尺寸在 100nm與150nm之間，且重量百分率濃度（wt%)在〇.4至 2 · 0之間。— _ Case No. 92123549 V. Description of the invention (6) Silicon, iron, titanium, tungsten, silicon dioxide, calcium carbonate, zinc sulfide and other materials, taking into account that the light penetration rate is more than 70%, 'fine particles 2 5 2's The size is between 100 nm and 150 nm, and the weight percentage concentration (wt%) is between 0.4 and 2.0.
本發明之有機發光顯示器之構造中，上述之基板s亦 可使用一透明基板。本發明之有機發光顯示器之構造中， 另包含一光反射層（未繪示）於透明基板（S)之下面，使有 機發光結構（例如1 20, 22 0 )所發出之光線能在通過電極層 (例如1 1 0，2 1 0 )之後，再經由位於透明基板之下面之光^ 射層將有機發光結構所發出之光線反射以供加強顯示亮度 之用。 又 發明之效果 在本發明中，藉由在有機發光結構上形成粗糙表面i 複數個小凸塊，或者是在有機發光結構的上方形成一透g 的高分子層，並在上述之透明層中摻雜微小粒子，可將^ 布拉格反射層匯聚後的光線做均 限制的顯示器。 ’ ^ .、，、祝} 雖然本發明已以齡彳去每 ^ ^ ?仏只％例揭露如上，然其並非用iIn the structure of the organic light emitting display of the present invention, a transparent substrate may be used for the substrate s described above. The structure of the organic light emitting display of the present invention further includes a light reflecting layer (not shown) under the transparent substrate (S), so that the light emitted by the organic light emitting structure (for example, 120, 220) can pass through the electrode After the layer (for example, 1 10, 2 1 0), the light emitted from the organic light emitting structure is reflected by a light emitting layer located under the transparent substrate for enhancing display brightness. Another effect of the invention In the present invention, a rough surface i is formed on the organic light emitting structure by a plurality of small bumps, or a transparent polymer layer is formed on the organic light emitting structure, and the transparent layer is formed in the transparent layer. Doped with small particles, the light condensed by the Bragg reflector can be used as a limited display. ’^. 、， 祝】 Although the present invention has been disclosed as above for every ^ ^?
限疋本發明，任何孰習此妊 Ί…S此技藝者，在不脫離本發明之精^ 和犯圍内，當可作4b許夕苗a mLimited to the present invention, anyone who is accustomed to this pregnancy 妊 ... S this skill, without departing from the spirit of the present invention ^ and crime, can be used as 4b Xu Ximiao a m
HI ^ ^ m ^ ^ 動與潤飾，因此本發明之保I 祀圍田視後附之中請專利範圍所界定者為準。HI ^ ^ m ^ ^ movement and retouching. Therefore, the protection of the invention of the present invention is subject to the scope of the patent, as defined in the appended claims.
第11頁 1224762 __年月 i 修正 圖式簡單· —-— 示意圖為本發明之有機發光元件構造之第—實施例的 本發明第一實施例中之光散射層的示意圖。 第2a圖為本發明之有機發光元件 示意圖。 卞偁l之弟-貫施例的 第2b圖為本發明第二實施例中之光散射屛 土 第3圖為習知有機發光元件之構造的示意、。不忍圖。 符號說明 ° 10〜 基材； 12〜 1%極； 1 4〜 電洞傳遞層; 13〜 導電層； 1 6〜 電子傳遞層/ 發 光層； 18〜 電子發射層； 20〜 透明導電層； 11 (L· 〜電極層； 120 ^ 〜有機發光結 構 ； 121 〜電子傳遞層 9 122 〜有機發光層 ， 123 〜電洞傳遞層 ； 130 〜透明導電層 ， 140 〜分散式布拉 格 反射層； 150 〜光散射層； 210 〜電極層；Page 11 1224762 __Year Month i Correction Simple drawing. —-— The schematic diagram is the first embodiment of the organic light-emitting element structure of the present invention, and the light scattering layer in the first embodiment of the present invention. Fig. 2a is a schematic view of an organic light emitting device according to the present invention. Fig. 2b of the 卞 偁 l-permanent embodiment Fig. 2b is a light-scattering soil in the second embodiment of the present invention. Fig. 3 is a schematic view showing the structure of a conventional organic light-emitting element. Can't bear to figure. Explanation of symbols ° 10 ~ substrate; 12 ~ 1% pole; 1 ~ 4 hole transfer layer; 13 ~ conductive layer; 16 ~ electron transfer layer / light emitting layer; 18 ~ electron emission layer; 20 ~ transparent conductive layer; 11 (L · ~ electrode layer; 120 ^ ~ organic light emitting structure; 121 ~ electron transfer layer 9 122 ~ organic light emitting layer, 123 ~ hole transfer layer; 130 ~ transparent conductive layer, 140 ~ dispersive Bragg reflection layer; 150 ~ light Scattering layer; 210 ~ electrode layer;
第12頁 1224762 _案號92123549_年月日 修正 圖式簡單說明 2 2 0〜有機發光結構； 221〜電子傳遞層； 222〜有機發光層； 2 2 3〜電洞傳遞層； 230〜透明導電層； 24 0〜分散式布拉格反射層； 2 5 0〜光散射層； 2 5 2〜微小粒子；Page 12 1224762 _ Case No. 92123549_ Year, month, day, and revision diagrams Brief description 2 2 0 ~ organic light emitting structure; 221 ~ electron transfer layer; 222 ~ organic light emitting layer; 2 2 3 ~ hole transfer layer; 230 ~ transparent conductive Layer; 24 0 ~ dispersed Bragg reflection layer; 250 ~ light scattering layer; 2 5 2 ~ fine particles;
第13頁Page 13
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| TW92123549ATWI224762B (en) | 2003-08-27 | 2003-08-27 | Organic LED display structure and manufacturing method thereof |
| JP2004240884AJP4734869B2 (en) | 2003-08-27 | 2004-08-20 | Organic light emitting display device and manufacturing method thereof |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW92123549ATWI224762B (en) | 2003-08-27 | 2003-08-27 | Organic LED display structure and manufacturing method thereof |
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| TWI224762Btrue TWI224762B (en) | 2004-12-01 |
| TW200509013A TW200509013A (en) | 2005-03-01 |
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| TW92123549ATWI224762B (en) | 2003-08-27 | 2003-08-27 | Organic LED display structure and manufacturing method thereof |
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