200841763 九、發明說明 【發明所屬之技術領域】 本發明係有關於一種電致發光裝置。 【先前技術】 由於較傳統液晶顯示器視角廣以及反應時間快，使用有 機發光材料的電致發光裝置的研發近來相當活躍。詳細古 之，當使用有機化合物作為發光材料時，其可預期實現 自發光源以及不論視角為何皆有高反應速度之^面顯干 器。當這些發光裝置結合在消費電子產品例如數位攝影機不 個人數位助理（^A)以及視訊電話之中時，其可提供例如低 消耗功率、高亮度以及設計輕薄的優點。 電致發光裝置之代表例子係為一有機發光二極體裝置 (Organic Light-Emitting Di〇de (0LED) ^心）。—般而古， 有機發光二極體係具有一發光特性之有機薄膜配置&於一 °透 明陽極以及一金屬陰極之間，該有機薄膜係内含可經由外加 電壓發光的發光材料。 全彩之有機電致發光裝置，大致可分為兩種構造： 第-種係使用不同發光顏色之有機#光層，使每一像素 具有紅色、綠色及藍色之子像素，並藉由獨立控制各子像素 之發光亮度，以組合成各種不同顏色之像素。然而要製造此 種構造之全彩有機電致發光裝置，就必須要有具有足夠發光 效率以及適當色度（eh贿atieity)之高效率紅、綠、藍發光 材料。此外，此種構造由於須分別形成不同顏色之發光層， 因此製造工程較繁雜，良率亦相對較低。 200841763 第二種構造則係於像素中使用相同之白色或藍色Μ 層，並搭配彩色濾光片或色轉換螢光體以達到多色顯示之效 果。但在此種構造中’部分由白色或藍色發光層發出之光會 被彩色濾、光片或色轉換螢光體所吸收’因此導致較差的 效率。 又 為改善前述發光效率較差之問題，f知之做法係於像素 中加入一白色子像素。由於白色子像素之光線不會經過彩色 濾光片或色轉換螢光體，因此發光裝置整體發光效率可因而200841763 IX. Description of the Invention [Technical Field of the Invention] The present invention relates to an electroluminescent device. [Prior Art] Since the conventional liquid crystal display has a wide viewing angle and a fast reaction time, the development of an electroluminescent device using an organic light-emitting material has recently been quite active. In detail, when an organic compound is used as a light-emitting material, it is expected to realize a self-luminous source and a surface-sensing device having a high reaction speed regardless of the viewing angle. When these light-emitting devices are incorporated in a consumer electronic product such as a digital camera, not a personal digital assistant (^A) and a videophone, they can provide advantages such as low power consumption, high brightness, and slim design. A representative example of the electroluminescence device is an organic light-emitting diode device (Organic Light-Emitting Di〇de (0LED) ^ core). In general, an organic light-emitting diode system having an illuminating property is disposed between a transparent anode and a metal cathode, and the organic film contains a luminescent material that emits light via an applied voltage. The full-color organic electroluminescent device can be roughly divided into two structures: the first-type uses organic light layers of different illuminating colors, so that each pixel has red, green and blue sub-pixels, and is controlled independently. The luminance of each sub-pixel is combined into pixels of various colors. However, in order to manufacture a full-color organic electroluminescent device of such a configuration, it is necessary to have a high-efficiency red, green, and blue luminescent material having sufficient luminous efficiency and appropriate chromaticity. In addition, since such a structure is required to separately form light-emitting layers of different colors, the manufacturing process is complicated and the yield is relatively low. 200841763 The second configuration uses the same white or blue enamel layer in the pixel and is matched with a color filter or a color-converting phosphor to achieve multi-color display. However, in such a configuration, the portion of the light emitted by the white or blue light-emitting layer is absorbed by the color filter, the light sheet or the color-converting phosphor, thus resulting in inferior efficiency. In order to improve the aforementioned problem of poor luminous efficiency, it is known to add a white sub-pixel to the pixel. Since the light of the white sub-pixel does not pass through the color filter or the color conversion phosphor, the overall luminous efficiency of the light-emitting device can be
〇 增加。然而此習知結構需要額外的線路與切換元件來控制白 色子像素’因而會造成開口率下降。 【發明内容】 因此，本發明的目的就是在提供一種電致發光裝置，其 可克服或至少改善前述先前技術之問題。 本發明之電致發光裝置具有至少三種不同顏色的複數 個晝素。該電致發光裝置主要包含複數個電致發光結構以及 分別對應於該些電致發光結構設置的至少三種不同顏色的 彩色濾光單元。該些電致發光結構係分別位於每—該些畫素 内。值得注意的是，每一該些彩色濾光單元具有至少一彩色 濾光片以及至少一透光區域。由於該透光區域具有較高的透 光率（transmittance)，因此可有效增加發光裝置整體=光效 率。此外，本發明之構造不需要額外的線路與切換元^，因 此可增加發光裝置之開口率。 根據本發明之電致發光結構較佳是一白光有機電致發 光結構，其至少包括一第一電極、一第二電極以及至少一設 7 200841763 置於上述第一電極與上述第二電極之間的白光發光有機材 料層。該些電致發光結構之間較佳係為複數個位於該些電致 發光結構之間的間隔壁隔開。 根據本發明之透光區域可以是全透光或部分透光，較佳 係可供波長400nm〜700nm之光線通過。 根據本發明之一面向，每一彩色濾光單元可具有複數個 衫色濾光片以及複數個透光區域並且該些彩色濾光片係與 該些透光區域交錯配置。 根據本發明之另一面向，每一彩色濾光單元可具有複數 個透光區域設於一彩色濾光片内。 根據本發明之又一面向，每一彩色濾光單元可具有複數 個彩色濾光片設於一透光區域内。 根據本發明之再一面向，該些彩色濾光單元上可設有一 平坦層，並且該些電致發光結構係設於該平坦層上。 根據本發明之再一面向，該些電致發光結構與該些彩色 濾光早70係分別設於一基板之上表面與下表面，並且該些彩 色濾光單元較佳係為一保護層所覆蓋。 一根據本發明之再一面向，該些電致發光結構與該些彩色 濾光早7L係分別設於不同基板上，並且該些電致發光結構係 面向該些彩色濾光單元配置。 根據本發明之再一面向，些彩色濾光單元係設於相對應 之電致發光結構上而形成複數個堆疊結構，並且該些堆疊結 構之間係被間隔壁隔開。 【實施方式】 8 200841763 雖然本發明可表現為不同形式之實施例，但附圖所示者 及於下文中說明者係為本發明之較佳實施例，並請了解本文 所揭示者係考量為本發明之範例，且並非意圖用以將本發明 限制於圖示及/或所描述之特定實施例中。 _ 本發明之實施例係參照圖式說明如下。第丨圖與第2 圖所示為根據本發明一實施例之電致發光裝置，其主要包含 設於一基板Π0上的複數個電致發光結構12()以及分別對應 於該2電致發光結構120設置的至少三種不同顏色的彩色 f'濾光單元130。該基板110可以玻璃、塑膠或其他適當材料 製成。一蓋件150係藉由一封止層（未示於圖中）接合於該 基板no。該封止層係夾設於該蓋件15〇與該基板11〇之 間，用以將該些電致發光結構12〇與周遭環境密封隔絕。該 封止層可為一介電複合層，該介電複合層可以由高分子材料 或無機介電材料形成，但不以此為限，能達成防水、氧滲透 及接合蓋件及基板的功能即可。 本發明之電致發光裝置較佳設有一平坦層i 6〇 (參見第 C 1圖）没於該些彩色濾光單元13〇上，並且該些電致發光結 構12 0係设於該平坦層1 6 0上。 如第2圖所示，本發明之每一彩色濾光單元13〇具有一 杉色濾光片132以及一透光區域134。由於該透光區域134 具有較咼的透光率（transmittance)，因此可有效增加發光裝 置整體發光效率。此外，本發明之構造不需要額外的線路與 切換元件，因此可增加發光裝置之開口率。根據本發明之透 光區域可以是全透光或部分透光，較佳係可供波長 400nm〜700nm之光線通過。根據本發明之發光裝置較佳設 200841763 有一遮光層（BM)190環繞每一該些彩色濾光片132以及每 一透光區域134設置，使得相鄰之彩色濾光片132與透光區 域134係為該遮光層（BM)所隔開。 如第1圖所示，前述之電致發光結構12〇包含一第一電 * 極122, 一第二電極124以及設置於該第一電極及第二電極 • 之間的發光層126。相鄰電致發光結構120係為一間隔壁18〇 (例如以樹脂形成）隔開，用以電性以及光學隔絕兩側之電 致發光結構120。電致發光結構12〇之發光強度與發光持續 〇 期間係以習知的主動或被動元件（未示於圖中）控制，在此 不做資述。 該電致發光結構120較佳係為一白光有機電致發光結 構，並且在每一畫素中，該白光有機電致發光結構所發出之 白光會通過相對應彩色濾光單幻3()之彩色;慮光片132㈣ 變為柄對應顏色光（如第i圖中箭頭所示）而發射至該電致 發光裝置之外’並且該白光有機電致發光結構所發出之白光 會通過相對應彩㈣、光單元13〇之透光區域m而發射至該 〇電致發光裝置之外’藉此進一步增加該電致發光裝置之古庚 與對比。 儿沒 該電致發光結構120之電極122、124可以是金屬（例 =物銀、錯、紹）、合金（例如鎂_銀合金）、導電性金屬 氧化物（例如銦錫氧化物（IT0))或是其混合物製成， ，、銀銀合金以及其混合物。該電極 4可能不只是只有單一層包含前述之化合物或是 :結構，亦可能是包含前述之化合物或是混 二 構。發光H26可藉由物理氣相沉積法，如分子束沉積：、、，: 200841763 電阻性加熱（resistive heating)法等等，形成於第一電極i22 的上表面。該發光層126可具有一有機增層結構 built-up structure) 〇 第2 ffl之電致發光裝置常會因製程誤差而使得相鄰兩 彩色濾、光單元13 0之透光區域13 4之間的間距大小不一，而 使晝面品質低下或導致亮度不均。 • 因此，在根據本發明另一實施例之電致發光裝置中，在 單一彩色濾光單元130中係設有複數個彩色濾光片132&以 fλ及複數個透光區域134a並且該些彩色濾光片132a係與該些 透光區域134a交錯配置（參見第3圖），藉此使得上述因製 程誤差所導致的問題較不易為人眼所察覺。此外，因為經由 複數個彩色濾光片132a所發出的色光以及經由複數個透光 區域134a所發出的白光，其混合後的顏色與亮度較均勻（相 較於第2圖之單一彩色濾光片與單一透光區域），故可以有 效提昇影像品質。因此如果採用第3圖之彩色濾光單元設 計，則即使經由透光區域所發出的白光與經由彩色濾光片所 1,發出的色光亮度差異大，亦或加上製程誤差造成的透光區域 位置變異，人眼亦無法察覺其間因距離及亮度變化所造成的 問題。 苐4圖所示為根據本發明另一實施例之電致發光裝 置’其圖示3個彩色濾光單元1 3 0。在此實施例中，單一彩 色濾光單元1 30係設有複數個透光區域丨34b於一彩色濾光 片132b内，藉此使得上述因製程誤差所導致的問題較不易 為人眼所察覺。此外，因為經由彩色濾光片丨32b所發出的 色光以及經由複數個透光區域丨34a所發出的白光，其混合 11 200841763 後的顏色與亮度較均句（相較於第2圖之單—彩色濾光片與 單一透光區域），故可以有效提昇影像品質。 第5圖所不為根據本發明另一實施例之電致發光裝 置，其圖不3個彩色濾光單元丨3〇。在此實施例中，單一彩 . 色濾光單元130係設有複數個彩色濾光片132c於一透光區 • 域134C内，藉此使得上述因製程誤差所導致的問題較不易 為人眼所察覺。此外，因為經由複數個彩色濾光片13。所 發出的色光以及經由透光區域134c所發出的白光，其混合 f -後的顏色與焭度較均勻（相較於第2圖之單一彩色濾光片與 單一透光區域），故可以有效提昇影像品質。 第6圖所示為根據本發明另一實施例之電致發光裝 置，其與第1圖之電致發光裝置大致相同，除了該些電致發 光結構120係設於該基板110上表面，並且該些彩色濾光單 兀130係設於該基板no下表面。在此實施例中，該些彩色 濾光單元130較佳係為一保護層192所覆蓋。本發明保護層 之材質可以是高分子聚合物、矽氧化合物、矽氧氮化合物或 I 秒氮化合物。 第7圖所示為根據本發明另一實施例之電致發光裝 置，其與第1圖之電致發光裝置大致相同，除了該些電致發 光結構120係設於該基板110上表面，並且該些彩^濾光單 元130係設於另一基板140上。該些電致發光結構12〇係面 向該些彩色渡光單元130配置。 第8圖所示為根據本發明另—實施例之電致發光裝 置’其與第1圖之電致發光裝置大致相同，除了該㈣色滤 光單元130係設於相對應之電致發光結構12〇上而形成複數 12 200841763 個堆豐結構1 7 0，並且該些堆疊結構 所隔開。 170之間係為間隔壁 180 雖然本發明已以實施例揭露如上，然其並非用U限定本 發明：任何熟習此技藝者，在不脫離本發明之精神和範圍 内田可作各種之更動與潤飾，因此本發明之保護範圍當視 後附之申請專利範圍所界定者為準。 【圖式簡單說明】 第1圖：根據本發明一實施例之電致發光裝置之部分剖 示圖。 第2圖: 第3圖： 第4圖： 第5圖： 第6圖: 第7圖： 第8圖： 第1圖電致發光裝置之上視圖，其圖示3個彩 色據光單元。 根據本發明另一實施例之彩色濾光單元。 根據本發明另一實施例之3個彩色濾光單元。 根據本發明另一實施例之3個彩色濾光單元。 根據本發明另一實施例之電致發光裝置之部分 剖示圖。 根據本發明另一實施例之電致發光裝置之部分 剖示圖。 根據本發明另一實施例之電致發光裝置之部分 剖示圖。 【主要元件符號說明】 120 電致發光結構 124 第二電極 110 基板 122第一電極 13 200841763 126 發光層 130 132, 132a，132b， 132c 彩色 134, 134a，134b， 134c 透光 150 蓋件 160 170 堆疊結構 180 190 遮光層 192 彩色濾光單元 濾光片 區域 平坦層 間隔壁 保護層 14〇 Increase. However, this conventional structure requires additional wiring and switching elements to control the white sub-pixels, thus causing a drop in aperture ratio. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an electroluminescent device that overcomes or at least ameliorates the problems of the aforementioned prior art. The electroluminescent device of the present invention has a plurality of halogens of at least three different colors. The electroluminescent device mainly comprises a plurality of electroluminescent structures and color filter units corresponding to at least three different colors respectively disposed in the electroluminescent structures. The electroluminescent structures are located within each of the pixels. It should be noted that each of the color filter units has at least one color filter and at least one light transmissive area. Since the light-transmitting region has a high transmittance, the overall light-emitting device = light efficiency can be effectively increased. Moreover, the construction of the present invention does not require additional wiring and switching elements, thus increasing the aperture ratio of the illumination device. The electroluminescent structure according to the present invention is preferably a white organic electroluminescent structure comprising at least a first electrode, a second electrode and at least one device 7 200841763 disposed between the first electrode and the second electrode The white light illuminates the organic material layer. Preferably, the electroluminescent structures are separated by a plurality of partition walls between the electroluminescent structures. The light-transmitting region according to the present invention may be fully transparent or partially transparent, and is preferably light having a wavelength of 400 nm to 700 nm. According to one aspect of the present invention, each of the color filter units may have a plurality of shirt color filters and a plurality of light transmissive regions and the color filters are alternately arranged with the light transmissive regions. According to another aspect of the present invention, each of the color filter units may have a plurality of light transmissive regions disposed in a color filter. According to still another aspect of the present invention, each of the color filter units may have a plurality of color filters disposed in a light transmissive area. According to still another aspect of the present invention, the color filter unit may be provided with a flat layer, and the electroluminescent structures are disposed on the flat layer. According to still another aspect of the present invention, the electroluminescent structures and the color filters are respectively disposed on the upper surface and the lower surface of a substrate, and the color filter units are preferably a protective layer. cover. According to still another aspect of the present invention, the electroluminescent structures and the color filters 7L are respectively disposed on different substrates, and the electroluminescent structures are disposed facing the color filter units. According to still another aspect of the present invention, the color filter units are formed on the corresponding electroluminescent structures to form a plurality of stacked structures, and the stacked structures are separated by a partition wall. [Embodiment] 8 200841763 The present invention may be embodied in various forms, and the embodiments shown in the drawings and the following description are preferred embodiments of the present invention. The examples of the invention are not intended to limit the invention to the particular embodiments illustrated and/or described. The embodiments of the present invention are explained below with reference to the drawings. Figure 2 and Figure 2 show an electroluminescent device according to an embodiment of the invention, which mainly comprises a plurality of electroluminescent structures 12 () disposed on a substrate 以及0 and corresponding to the two electroluminescences respectively. The structure 120 is provided with at least three different color color f' filter units 130. The substrate 110 can be made of glass, plastic or other suitable material. A cover member 150 is joined to the substrate no by a stopper (not shown). The sealing layer is interposed between the cover member 15 and the substrate 11 to seal the electroluminescent structures 12 from the surrounding environment. The sealing layer may be a dielectric composite layer, and the dielectric composite layer may be formed of a polymer material or an inorganic dielectric material, but not limited thereto, and the functions of waterproofing, oxygen permeation, and bonding of the cover member and the substrate can be achieved. Just fine. The electroluminescent device of the present invention is preferably provided with a flat layer i 6 〇 (see FIG. 1 1 ) not on the color filter units 13 ,, and the electroluminescent structures 120 are disposed on the flat layer. 1 6 0 on. As shown in Fig. 2, each color filter unit 13 of the present invention has a sap filter 132 and a light transmitting region 134. Since the light-transmitting region 134 has a relatively low transmittance, the overall luminous efficiency of the light-emitting device can be effectively increased. Moreover, the construction of the present invention does not require additional wiring and switching elements, thus increasing the aperture ratio of the illumination device. The light-transmitting region according to the present invention may be fully transparent or partially transparent, and is preferably light having a wavelength of 400 nm to 700 nm. The light-emitting device according to the present invention preferably has a light-shielding layer (BM) 190 disposed around each of the color filters 132 and each of the light-transmitting regions 134 such that the adjacent color filters 132 and the light-transmitting regions 134 are disposed. It is separated by the light shielding layer (BM). As shown in Fig. 1, the electroluminescent structure 12A includes a first electrode 122, a second electrode 124, and a light-emitting layer 126 disposed between the first electrode and the second electrode. Adjacent electroluminescent structures 120 are separated by a spacer 18 (e.g., formed of a resin) for electrically and optically isolating the electroluminescent structures 120 on both sides. The luminous intensity and luminescence of the electroluminescent structure 12 are controlled by conventional active or passive components (not shown) and will not be described herein. The electroluminescent structure 120 is preferably a white organic electroluminescent structure, and in each pixel, the white light emitted by the white organic electroluminescent structure passes through a corresponding color filter. Color; the light-receiving sheet 132 (four) becomes the handle corresponding to the color light (as indicated by the arrow in the figure i) and is emitted outside the electroluminescent device' and the white light emitted by the white organic electroluminescent structure passes through the corresponding color (4) The light-transmitting region m of the light unit 13 is emitted outside the germanium electroluminescent device, thereby further increasing the Geng and contrast of the electroluminescent device. The electrodes 122, 124 of the electroluminescent structure 120 may be metal (eg, silver, silver, silver), alloy (eg, magnesium-silver alloy), conductive metal oxide (eg, indium tin oxide (IT0)) Or a mixture of them, silver silver alloy and mixtures thereof. The electrode 4 may be composed of not only a single layer containing the aforementioned compound or a structure, but also a compound or a mixed structure as described above. The luminescence H26 can be formed on the upper surface of the first electrode i22 by physical vapor deposition, such as molecular beam deposition: , , : 200841763 resistive heating or the like. The luminescent layer 126 may have an organic build-up structure. The electroluminescent device of the second ffl often causes an adjacent two color filter, the light transmissive region 13 4 of the light unit 130 The spacing varies from size to size, resulting in poor quality or uneven brightness. Therefore, in the electroluminescent device according to another embodiment of the present invention, a plurality of color filters 132 & fλ and a plurality of light transmissive regions 134a are disposed in the single color filter unit 130 and the colors are The filter 132a is arranged in a staggered manner with the light-transmitting regions 134a (see FIG. 3), whereby the above-mentioned problems caused by process errors are less likely to be perceived by the human eye. In addition, because the color light emitted through the plurality of color filters 132a and the white light emitted through the plurality of light-transmitting regions 134a, the mixed color and brightness are relatively uniform (compared to the single color filter of FIG. 2) And a single light transmission area), so it can effectively improve the image quality. Therefore, if the color filter unit design of FIG. 3 is adopted, even if the white light emitted through the light-transmitting region and the color filter passing through the color filter 1 have a large difference in brightness, or a light-transmitting region caused by a process error is added. The position is mutated, and the human eye is not aware of the problems caused by the change in distance and brightness. Fig. 4 is a view showing an electroluminescence device according to another embodiment of the present invention, which shows three color filter units 130. In this embodiment, the single color filter unit 190 is provided with a plurality of light-transmissive regions 丨34b in a color filter 132b, so that the above-mentioned problems caused by process errors are less likely to be perceived by the human eye. . In addition, because of the color light emitted through the color filter 丨32b and the white light emitted through the plurality of light-transmissive regions 丨34a, the color and brightness after mixing 11 200841763 are more uniform (compared with the single image in FIG. 2). The color filter and the single light transmission area) can effectively improve the image quality. Fig. 5 is not an electroluminescent device according to another embodiment of the present invention, which is a view of three color filter units 丨3〇. In this embodiment, the single color filter unit 130 is provided with a plurality of color filters 132c in a light transmissive area 134C, thereby making the above-mentioned problems caused by process errors less likely to be human eyes. Perceived. In addition, it is via a plurality of color filters 13. The emitted color light and the white light emitted through the light-transmitting region 134c are more uniform in color and twist after mixing f - (compared to the single color filter and the single light-transmitting region in FIG. 2), so that it can be effective Improve image quality. 6 is an electroluminescent device according to another embodiment of the present invention, which is substantially the same as the electroluminescent device of FIG. 1 except that the electroluminescent structures 120 are disposed on the upper surface of the substrate 110, and The color filter cells 130 are disposed on the lower surface of the substrate no. In this embodiment, the color filter units 130 are preferably covered by a protective layer 192. The material of the protective layer of the present invention may be a high molecular polymer, an anthracene compound, a cerium oxynitride or a 1-second nitrogen compound. FIG. 7 is a view showing an electroluminescent device according to another embodiment of the present invention, which is substantially the same as the electroluminescent device of FIG. 1 except that the electroluminescent structures 120 are disposed on the upper surface of the substrate 110, and The color filter units 130 are disposed on the other substrate 140. The electroluminescent structures 12 are arranged to face the color light-emitting units 130. Figure 8 is a view showing an electroluminescent device according to another embodiment of the present invention, which is substantially identical to the electroluminescent device of Figure 1, except that the (four) color filter unit 130 is provided in a corresponding electroluminescent structure. 12〇 is formed to form a complex number 12 200841763 stacking structure 1 70, and the stacking structures are separated. Between the 170 is a partition wall 180. Although the invention has been disclosed above by way of example, it is not intended to limit the invention. Any skilled person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partial cross-sectional view showing an electroluminescent device according to an embodiment of the present invention. Figure 2: Figure 3: Figure 4: Figure 5: Figure 6: Figure 7: Figure 8: Figure 1 is a top view of the electroluminescent device, showing three color light units. A color filter unit according to another embodiment of the present invention. Three color filter units according to another embodiment of the present invention. Three color filter units according to another embodiment of the present invention. A partial cross-sectional view of an electroluminescent device in accordance with another embodiment of the present invention. A partial cross-sectional view of an electroluminescent device in accordance with another embodiment of the present invention. A partial cross-sectional view of an electroluminescent device in accordance with another embodiment of the present invention. [Main component symbol description] 120 electroluminescent structure 124 second electrode 110 substrate 122 first electrode 13 200841763 126 light emitting layer 130 132, 132a, 132b, 132c color 134, 134a, 134b, 134c light transmitting 150 cover member 160 170 stacking Structure 180 190 light shielding layer 192 color filter unit filter region flat layer spacer protective layer 14