1255152 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種有機電激發光顯示面板，特別關於 一種降低暗點現象之有機電激發光顯示面板。 【先前技術】 近年來平面顯示器朝著高亮度、平面化、輕薄以及省 能源的趨勢發展，有鑑於此，有機電激發光（OEL·)顯示 面板成為目前光電產業中極欲發展的方向之一。有機電激 發光顯示面板係利用有機官能性材料（organic functional materials)的自發光的特性來達到顯示效果，依照有機官 月b性材料的分子量不同’可分為小分子有機電激發光顯示 面板（small molecule OLED，SM-OLED)與高分子有機電 激發光顯示面板（polymer light-emitting display, PLED ) 兩大類。 有機電激發光顯示面板係由有機電激發光元件所構 成’為達全彩化之目的，目前有機電激發光顯示面板主要 使用之全彩化技術可分為三種：第一種係採用R、G、B 二原色為各自獨立之發光晝素的「三原色發光法」；第二 種係利用藍色材料配合紅、綠有機螢光體或白光配合紅、 綠、藍有機螢光體來產生各種顏色的「色轉換法」；第三 種是以白色發光層搭配彩色濾光片的「彩色濾光片法」； 以下以「色轉換法」的技術為例說明。 如圖1所示，全彩之有機電激發光顯示面板1係包含 1255152 一有機電激發光區10、一平垣層11、一光學調變層12以 及一基板13。其中，光學調變層12係包含至少一色轉換 單元121設置於基板13上，平垣層u係設置於光學調變 層12上，有機電激發光區10係包含至少一有機電激發光 元件101，有機電激發光元件1〇丨對應色轉換單元121設 置於平坦層11上。 有機電激發光元件101依序包含一第一電極102、一 有機官能層103及一第二電極1〇4，作用原理係當對電極 施以電流時，使電洞和電子在有機官能層103内再結合 (recombination)而產生激子，使有機官能層1〇3依照其材 料之特性而發光，色轉換單元121包含一濾光層122與一 色轉換層122’ ；於此，當設計有機電激發光元件ι〇1發射 一白光，白光經過色轉換單元121(例如係包含紅色轉換 膜、綠色轉換膜或藍色轉換膜)後，即可藉此分別產生全彩 所需的二原色光一紅光、綠光及藍光。 請繼續參照圖1 ’由於有機電激發光元件1〇1對於水 氣及/或氧氣非常敏感’-旦外界之水氣及/或氧氣例如係 經由平坦層11或其他處不密閉之結構侵人有機電激發光 元件101而杈蝕有機電數發光元件1〇1時，會因而使有機 電激發細不面板1形成所謂的暗點現象(dafksp〇t)。 爰因於此’如何提供_種有效降低暗點現象之有機電 激發光顯示面板實為當前平面顯示器的重要課題之一。 【發明内容】 1255152 有鑑於上述課題，本私 規有機電激發光顯示叫。目的為提供—種降低暗點 係依2=1，依之有機電激發光顯示面板 7已3暴板、一先學調變屑以石,、_ 令1255152 IX. Description of the Invention: [Technical Field] The present invention relates to an organic electroluminescence display panel, and more particularly to an organic electroluminescence display panel which reduces a dark spot phenomenon. [Prior Art] In recent years, flat panel displays are moving toward high brightness, flatness, thinness, and energy saving. In view of this, organic electroluminescent (OEL) display panels have become one of the most promising directions in the optoelectronic industry. . The organic electroluminescence display panel utilizes the self-luminous property of organic functional materials to achieve a display effect, and can be classified into a small molecule organic electroluminescence display panel according to the molecular weight of the organic official b material. Small molecule OLED, SM-OLED) and polymer light-emitting display (PLED). The organic electroluminescence display panel is composed of organic electroluminescence elements for the purpose of full colorization. At present, the full colorization technology mainly used in organic electroluminescence display panels can be divided into three types: the first type adopts R, The two primary colors of G and B are the "three primary color illuminating methods" of the independent luminescent elements; the second type uses blue materials together with red, green organic phosphors or white light with red, green and blue organic phosphors to produce various The "color conversion method" of the color; the third is the "color filter method" in which the white light-emitting layer is matched with the color filter; the following is a description of the technique of the "color conversion method". As shown in FIG. 1, the full-color organic electroluminescent display panel 1 comprises a 1255152 organic electroluminescent region 10, a flat layer 11, an optical modulation layer 12, and a substrate 13. The optical modulation layer 12 includes at least one color conversion unit 121 disposed on the substrate 13, the flat layer u is disposed on the optical modulation layer 12, and the organic electroluminescent region 10 includes at least one organic electroluminescent element 101. The organic electroluminescence element 1 〇丨 is provided on the flat layer 11 corresponding to the color conversion unit 121. The organic electroluminescent device 101 sequentially includes a first electrode 102, an organic functional layer 103 and a second electrode 1〇4. The principle of action is to apply holes and electrons to the organic functional layer 103 when current is applied to the electrodes. The exciton is generated by internal recombination, so that the organic functional layer 1〇3 emits light according to the characteristics of the material thereof, and the color conversion unit 121 includes a filter layer 122 and a color conversion layer 122'. Here, when designing the organic electricity The excitation light element ι〇1 emits a white light, and the white light passes through the color conversion unit 121 (for example, includes a red conversion film, a green conversion film or a blue conversion film), thereby respectively generating two primary colors of light required for full color. Light, green and blue light. Please continue to refer to FIG. 1 'Because the organic electroluminescent element 1〇1 is very sensitive to moisture and/or oxygen' - the external moisture and/or oxygen, for example, is invaded by the flat layer 11 or other structures that are not closed. When the organic electroluminescence element 101 is etched and the organic electro-luminous element 1 〇 is eroded, the organic electro-excited thin panel 1 thus forms a so-called dark spot phenomenon (dafksp〇t).爰 Because of this, how to provide an organic electroluminescence display panel that effectively reduces dark spots is one of the important topics of current flat panel displays. SUMMARY OF THE INVENTION 1255152 In view of the above problems, this private organic electroluminescence display is called. The purpose is to provide a kind of reduction of dark spots, depending on 2=1, according to the organic electroluminescence excitation display panel 7 has 3 storm boards, a first learning to change the shavings to stone, _ order
光區；其，，光學調變層係包含:少一光電激J 機電激發光區係包含至少1應光學調變;;=電 激發光元件，且有機電激發光 有機電 元的面積。 ⑦件的面積切光學調變單 承上所述，依據本發明之有雷 利用有機電激發光元件之面積大於光學調單:面=增二 有機電激發光元件對錢及/魏氣從側邊侵狀抿 性，以提南有機電激發光元件發光面積的穩定度 機電激發光元件發光面積的内墻， 高面板之使料命。⑽’進而降低暗點現象以提 【實施方式】 以下將參照相關圖式，翊日日分祕丄々 有機電激發光顯示面板，其中相^ :二軚佳實施例> 符號加以說明。、中相—同的參丨 圖2繪示依據本發明較佳實^ | ^ 佐貝靶例之有機電激發光顯: 面板的示意圖。請參照圖2所示，依據本發明較佳實施/ 之有機電激發光顯示面板2係依序包含一基板21、一光 調變層22以及至少一有機電激發光區23。 光學調變層22係包含至少一光學調變單元221，在 7 1255152 實施例中，光學調變單元221係可選自色轉換層、濾光層、 光學多層膜及半鏡面膜至少其中之一；光學調變單元221 亦可包含一濾光層222與一色轉換層222，，色轉換層222, 係設置於濾光層222之上（如圖3所示）。 如圖2所示’有機電激發光區23係包含至少一對應 光學調變單元221之有機電激發光元件23ι，且有機電激 發光元件231的面積大於光學調變單元221的面積；更詳 鲁細來說’ a代表有機電激發光元件231剖面之寬度，b代表 光學調變單元221剖面之寬度，a係實際上大於b。其中， 有機電激發光元件231係依序包含一第一電極232、至少 一有機官能層233及一第二電極234。 承上所述，基板21係選自剛性基板、柔性基板、玻 璃基板、塑膠基板及矽基板至少其中之一，且其材質係可 選自聚曱基丙烯甲酯、塑膠、高分子、玻璃及矽至少其中 之一0 Φ 有機電激發光元件231之第一電極232通常為陽極， 其材質係可為導電之金屬氧化物，導電之金屬氧化物係選 自銦錫氧化物、鋁鋅氧化物、銦鋅氧化物及鎘錫氧化物至 少其中之一’利用例如藏鍍(sputtering)或離子電鍍(ion plating)等方式形成於光學調變層22之上。 有機官能層233通常包含一電洞注入層、一電洞傳遞 層、一發光層、一電洞阻擋層、一電子傳遞層、一電子注 入層及其組合（圖中未顯示），有機官能層233係可利用例 如蒸鍍(evaporation)、旋轉塗佈（spin coating)、喷墨印刷（ink 1255152 jet printing)、移轉(transfer)或印刷（printing)等方式形成於 第一電極232上。此外，有機官能層233所發射的光線可 為藍光、綠光、紅光、白光、其他的單色光或單色組合之 彩色光。 第二電極234通常為陰極，其材質係可為導電材質， 導電材質係選自銘、妈、鎂、銦、錫、锰、銅、銀、金及 其合金至少其中之一，其中含鎂之合金可為鎂銀合金、鎂 ^ 銦合金、鎂錫合金、鎂録合金或鎮蹄合金，利用藏鍵或離 子電鍍等方法形成於有機官能層233上。 此外，第一電極232與第二電極234之材質與作為陰 陽極之應用，係可依據實際需求而加以互換。 如圖3所示，在本實施例中，有機電激發光顯示面板 2之光學調變層22更可包含一遮光框223，其係設置於光 學調變單元221之間，用以區隔光學調變單元221 ;遮光 框223係包含黑色框，用以避免不同顏色的光發生混合的 春 現象；當然，遮光框223亦可包含反射性金屬，用以控制 光的行進方向，增加光的利用度及均勻度。 請參照圖4所示，在本實施例之有機電激發光顯示面 板2，更可包含一平坦層24，其設置於光學調變層22與 有機電激發光元件231之間，用以平坦化光學調變層22 ; 平坦層24係可為透明或半透明，且平坦層24之材質可包 含聚合物例如壓克力。 綜上所述，依據本發明較佳實施例之有機電激發光顯 示面板，係包含對應且面積大於光學調變單元之有機電激 1255152 發光元件，因而可提高水氣及/或氧氣從有機電激發光元件 側邊侵蝕之抵抗性，由此維持有機電激發光元件發光面積 的穩定性，減少有機電激發光元件發光面積的内縮，進而 降低暗點現象以及提高有機電激發光顯示面板的使用壽 命。 以上所述僅為舉例性，而非為限制性者。任何未脫離 本發明之精神與範疇，而對其進行之等效修改或變更，均 I 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1繪示習知之有機電激發光顯示面板的示意圖； 圖2繪示依據本發明較佳實施例之有機電激發光顯示 面板的示意圖； 圖3繪示依據本發明另一較佳實施例之有機電激發光 顯示面板的示意圖；以及 籲圖4繪示依據本發明再一較佳實施例之有機電激發光 顯示面板的示意圖。 元件符號說明： 1 有機電激發光顯示面板 10 有機電激發光區 101 有機電激發光元件 102 第一電極 103 有機官能層 1255152The optical zone; wherein, the optical modulation layer comprises: a photo-excited J electromechanical excitation region comprising at least one optical modulation;; = an electroluminescent element, and an area of the organic electroluminescent organic cell. According to the invention, the area of the organic optical excitation element is larger than that of the optical adjustment: the surface = the second organic electroluminescence element is on the side of the money and / Wei gas The edge intrusion is sturdy, and the interior wall of the light-emitting area of the electro-optical excitation element is enhanced by the stability of the light-emitting area of the organic electroluminescence element of the South. The high panel makes the material life. (10) Further, the phenomenon of dark spots is further reduced. [Embodiment] Hereinafter, the organic electroluminescence display panel will be described with reference to the related drawings, and the description will be made with reference to the symbols of the second embodiment. , the middle phase - the same reference Figure 2 shows a schematic diagram of the panel of the organic electroluminescent display according to the preferred embodiment of the present invention. Referring to FIG. 2, the organic electroluminescent display panel 2 according to the preferred embodiment of the present invention comprises a substrate 21, a light modulation layer 22 and at least one organic electroluminescent region 23 in sequence. The optical modulation layer 22 includes at least one optical modulation unit 221, and in the embodiment of 1 1255152, the optical modulation unit 221 can be selected from at least one of a color conversion layer, a filter layer, an optical multilayer film, and a semi-mirror film. The optical modulation unit 221 can also include a filter layer 222 and a color conversion layer 222, and the color conversion layer 222 is disposed on the filter layer 222 (as shown in FIG. 3). As shown in FIG. 2, the organic electroluminescence region 23 includes at least one organic electroluminescence element 23 ι corresponding to the optical modulation unit 221, and the area of the organic electroluminescence element 231 is larger than the area of the optical modulation unit 221; In detail, 'a represents the width of the cross section of the organic electroluminescence element 231, b represents the width of the cross section of the optical modulation unit 221, and a is actually larger than b. The organic electroluminescent device 231 sequentially includes a first electrode 232, at least one organic functional layer 233, and a second electrode 234. As described above, the substrate 21 is selected from at least one of a rigid substrate, a flexible substrate, a glass substrate, a plastic substrate, and a germanium substrate, and the material thereof may be selected from the group consisting of polymethyl methacrylate, plastic, polymer, glass, and The first electrode 232 of the organic electroluminescent device 231 is usually an anode, and the material thereof is a conductive metal oxide. The conductive metal oxide is selected from the group consisting of indium tin oxide and aluminum zinc oxide. At least one of indium zinc oxide and cadmium tin oxide is formed on the optical modulation layer 22 by, for example, sputtering or ion plating. The organic functional layer 233 generally comprises a hole injection layer, a hole transfer layer, a light emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer and a combination thereof (not shown), and an organic functional layer. The 233 system can be formed on the first electrode 232 by, for example, evaporation, spin coating, inkjet printing (ink 1255152 jet printing), transfer, or printing. In addition, the light emitted by the organic functional layer 233 may be blue light, green light, red light, white light, other monochromatic light, or a combination of monochromatic colors. The second electrode 234 is usually a cathode, and the material thereof is made of a conductive material. The conductive material is selected from at least one of Ming, Ma, Mg, indium, tin, manganese, copper, silver, gold and alloys thereof, and contains magnesium. The alloy may be a magnesium-silver alloy, a magnesium-indium alloy, a magnesium-tin alloy, a magnesium alloy or a hoof alloy, and is formed on the organic functional layer 233 by means of a Tibetan bond or ion plating. Further, the materials of the first electrode 232 and the second electrode 234 and the application as the cathode anode can be interchanged according to actual needs. As shown in FIG. 3, in the embodiment, the optical modulation layer 22 of the organic electroluminescent display panel 2 further includes a light shielding frame 223 disposed between the optical modulation units 221 for separating the optical The modulating unit 221; the light-shielding frame 223 includes a black frame for avoiding the spring phenomenon in which different colors of light are mixed; of course, the light-shielding frame 223 may also include a reflective metal for controlling the traveling direction of the light and increasing the utilization of light. Degree and uniformity. As shown in FIG. 4 , the organic electroluminescent display panel 2 of the present embodiment further includes a flat layer 24 disposed between the optical modulation layer 22 and the organic electroluminescent element 231 for planarization. The optical modulation layer 22; the flat layer 24 may be transparent or translucent, and the material of the flat layer 24 may comprise a polymer such as acryl. In summary, the organic electroluminescent display panel according to the preferred embodiment of the present invention includes an organic electro-excitation 1255152 illuminating element corresponding to an area larger than the optical modulation unit, thereby improving moisture and/or oxygen from the organic electric The resistance of the side of the excitation element is eroded, thereby maintaining the stability of the light-emitting area of the organic electroluminescent device, reducing the shrinkage of the light-emitting area of the organic electroluminescent device, thereby reducing the dark spot phenomenon and improving the organic electroluminescent display panel. Service life. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the present invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a conventional organic electroluminescent display panel; FIG. 2 is a schematic view of an organic electroluminescent display panel according to a preferred embodiment of the present invention; A schematic diagram of an organic electroluminescent display panel according to a preferred embodiment; and FIG. 4 is a schematic diagram of an organic electroluminescent display panel according to still another preferred embodiment of the present invention. Description of component symbols: 1 Organic electroluminescent display panel 10 Organic electroluminescent region 101 Organic electroluminescent device 102 First electrode 103 Organic functional layer 1255152
104 第二電極 11 平坦層 12 光學調變層 121 色轉換單元 122 遽光層 1225 色轉換層 13 基板 2 有機電激發光顯示面板 21 基板 22 光學調變層 221 光學調變單元 222 濾光層 222， 色轉換層 223 遮光框 23 有機電激發光區 231 有機電激發光元件 232 第一電極 233 有機官能層 234 第二電極 24 平坦層 11104 second electrode 11 flat layer 12 optical modulation layer 121 color conversion unit 122 phosphor layer 1225 color conversion layer 13 substrate 2 organic electroluminescent display panel 21 substrate 22 optical modulation layer 221 optical modulation unit 222 filter layer 222 , color conversion layer 223 light shielding frame 23 organic electroluminescence region 231 organic electroluminescence element 232 first electrode 233 organic functional layer 234 second electrode 24 flat layer 11