200532934 五、發明說明（1) ' '— - 【發明所屬之技術領域】 本發明係有關於一種白光發光二極體單元，更有關於 一種兼具發光效率及演色性之白光發光二極體單 、 【先前技術】 白光係為多顏色之混合光，可被人眼感覺為白光者，且 至少包括二種以上波長之混合光。例如，當人眼同時受紅 、藍、綠光的刺激時、或同時受到藍光與黃光的刺激時， 均可感受為白光。因此，可依照此種原理，來製作一可發出 白光之半導體發光裝置。習知之白光半導體發光裝置4製 造方式分述如下。 弟 種方式係使用以填化紹嫁姻（A 1 I n G a P )、氮化錮 I豕（I n G a N )與峨化鎵（a P )為材質的三顆紅藍綠發光二極體 ，才二制通過各發光^一極體之電流，而使其分別發出紅、綠及 I光。將此二顆發光二極體晶粒配置於同一個燈泡（1㈣p) 中，並利用透鏡將三種顏色之光加以混合而產生白光。如 第一 A圖所示在基材1 〇上可以安置紅色發光二極體[r、綠 色發光二極體LG及藍色發光二極體LB，並在上面覆蓋封裝 膠體1 1以做保護用途。第一 B圖所示為此習知白光單元之 發光頻譜，可看出紅色發光二極體L R、綠色發光二極體l G 及藍色發光二極體LB發射光譜中心分隔且並非寬廣分布。 由於白光是4 0 0 - 7 2 0 nm間連續分布之光譜形成，因此該習知 白光發光二極體色彩飽合度較低。雖然人類的眼睛可忽略 此現象而只看見白色光，但在—些精密度較高之光學偵檢 器的感測下，例如攝影機或相機等，其演色性（c ο 1 〇 r200532934 V. Description of the invention (1) '' —-[Technical field to which the invention belongs] The present invention relates to a white light emitting diode unit, and more particularly to a white light emitting diode unit having both light emitting efficiency and color rendering. [Previous technology] White light is a mixed light of multiple colors, which can be perceived by the human eye as white light, and includes at least two kinds of mixed light of wavelengths. For example, when the human eye is stimulated by red, blue, and green light at the same time, or when it is stimulated by blue and yellow light at the same time, it can be perceived as white light. Therefore, a semiconductor light-emitting device capable of emitting white light can be manufactured according to this principle. The manufacturing method of the conventional white-light semiconductor light-emitting device 4 is described below. This method uses three red, blue, and green lights that are made of A1 I n G a P, Ai I N (I n G a N), and gallium eelide (a P). Diodes, only two systems pass through the current of each light emitting ^ monopole, so that they emit red, green and I light. The two light emitting diode crystals are arranged in the same bulb (1㈣p), and the three colors of light are mixed by a lens to generate white light. As shown in the first figure A, a red light-emitting diode [r, a green light-emitting diode LG, and a blue light-emitting diode LB can be placed on the substrate 10, and the packaging gel 11 is covered thereon for protection. . Figure 1B shows the emission spectrum of this conventional white light unit. It can be seen that the centers of the emission spectrum of the red light emitting diode L R, the green light emitting diode 1 G, and the blue light emitting diode LB are not separated and are not widely distributed. Since white light is formed by a continuously distributed spectrum between 4 0-7 2 0 nm, the conventional white light emitting diode has a low color saturation. Although human eyes can ignore this phenomenon and only see white light, the color rendering (c ο 1 〇 r) of some high-precision optical detectors, such as video cameras or cameras,
200532934 五、發明說明（2) rendering property)在實質上仍偏低。再者當不同光色 發光二極體其中之一發生故障時，將無法得到正常的白光， 且總體而言，發光效率較差。 第二種方式為199 6年日本日亞化學（Nichia Chemical )公司所發展出之技術，其係以氮化銦鎵藍光發光二極體配 合受激發可發出黃光之釔鋁石榴石型螢光粉，來製成一白 光光源。由於此種方式僅須使用一組發光二極體晶片，可 大幅地降低製造成本。參見第二圖，為此習知技術之示意 圖，在基材10上可以安置藍色發光二極體LB，並在上面覆蓋 黃色螢光體PY，以吸收藍色發光二極體LB並發出黃光，並與 藍光混合成為白光。現今其所搭配之螢光粉調製技術已臻 成熟，故已有商品呈現，然而此白光發光二極體演色性更 差。 【發明内容】200532934 V. Description of invention (2) Rendering property) is still low in nature. Furthermore, when one of the light-emitting diodes of different light colors fails, normal white light cannot be obtained, and the luminous efficiency is generally poor. The second method is a technology developed by Japan's Nichia Chemical Company in 1996. It uses indium gallium nitride blue light-emitting diodes in combination with yttrium aluminum garnet-type phosphors that emit yellow light when excited. To make a white light source. Since only one set of light-emitting diode wafers is required in this way, manufacturing costs can be greatly reduced. Referring to the second figure, a schematic diagram of the conventional technology is shown. A blue light-emitting diode LB can be placed on the substrate 10 and covered with a yellow phosphor PY to absorb the blue light-emitting diode LB and emit a yellow light. Light and mixed with blue light to become white light. Nowadays, the fluorescent powder modulation technology that it is equipped with has matured, so it has been presented in commercial products. However, this white light-emitting diode has poor color rendering. [Summary of the Invention]
本發明之主要目的在於提供一種可兼具發光效率及演 色性之白光發光一極體早元，以解決上述習知白光發光二、 極體之缺點。‘ X 為達成本發明之上述目的，本發明提供一種白光發光 單元白光發光二極體單元，包含一基材，例如可以為一$絕緣 基材；至少一藍色發光二極體，位於基材上，且可以為說化 物系化合物半導體所製成；一混合螢光體，包含紅色螢光 體、綠色螢光體及黃色螢光體；並包覆於該藍色發光二極 體外側。該紅色螢光體可採用CaS:Eu或SrS:Eu;黃色榮光 體可採用YAG:Ce或TbAG:Ce;而綠色螢光體可採用化以仏The main purpose of the present invention is to provide a white light emitting polar body early element which can have both luminous efficiency and color rendering, so as to solve the shortcomings of the conventional white light emitting polar body and polar body. 'X In order to achieve the above-mentioned object of the present invention, the present invention provides a white light emitting unit, a white light emitting diode unit, including a substrate, which can be, for example, an insulating substrate; at least one blue light emitting diode is located on the substrate It can be made of a compound semiconductor based on a compound; a mixed phosphor including a red phosphor, a green phosphor, and a yellow phosphor; and it is coated on the outside of the blue light-emitting diode. The red phosphor can use CaS: Eu or SrS: Eu; the yellow phosphor can use YAG: Ce or TbAG: Ce; and the green phosphor can use
第7頁 200532934Page 7 200532934
:Eu或CasEuMnMgCSi Ο*) f ls，以配合藍色發光二極體之藍 而混合出高演色性白光。 一為了使貴審查委員能更進一步瞭解本發明之特徵及 技術内容，請參閱以下有關本發明之詳細說明與附圖，然 所附圖式僅提供參考與說明用，並非用來對本發明加以 制者。 【實施方式】 如第三圖所示，為依據本發明之較佳具體實例之一種 白光發光二極體單元2之示意圖。該白光發光二極體單元 包含一基材20、位在基材20上之藍色發光二極體LB、及位 在藍色發光二極體LB上之紅色螢光體PR及綠色螢光體μ 該紅色螢光體PR及綠色螢光體Pg可以吸收藍色發光二極_ LB之藍光而分別發出紅光及綠光，並與藍色發光二極體 之藍光混合成白光。 上述說明之紅色及綠色螢光體中，該紅色螢光體可採 用CaS:Eu或SrSzEu;而綠色螢光體可採用化以仏：以或q: Eu or CasEuMnMgCSi 〇 *) f ls to mix with the blue of the blue light-emitting diode to mix with high color rendering white light. First, in order to allow your reviewers to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention, but the drawings are provided for reference and explanation only, and are not intended to restrict the present invention. By. [Embodiment] As shown in the third figure, it is a schematic diagram of a white light emitting diode unit 2 according to a preferred embodiment of the present invention. The white light emitting diode unit includes a substrate 20, a blue light emitting diode LB located on the substrate 20, and a red phosphor PR and a green phosphor located on the blue light emitting diode LB. μ The red phosphor PR and the green phosphor Pg can absorb the blue light of the blue light emitting diode _LB and emit red and green light, respectively, and mix with the blue light of the blue light emitting diode to form white light. Among the red and green phosphors described above, the red phosphor may use CaS: Eu or SrSzEu; and the green phosphor may be converted to 仏: or q
EuMnMgCSiO4)^2。但是須知除了前述之螢光體外尚有其二 可用之螢光體，但並不代表本案發明只限用上述螢光體亦 包括了其他可被藍光波長（ 4 0 0 —49 〇nm)範圍激發之螢光體、 材料。 參見第四A圖，為依據本發明之另一較佳具體實例之白 光發光二極體單元2之示意圖。該白光發光二極體單元跑 含-基材20(例如可以n緣基材）、位在基材2〇上之 藍色發光二極體LB (可以為氮化物系化合物半導體所製成 200532934 五、發明說明（4) )、及位在藍色發光二極體LB上之紅色、綠色及黃色混合 螢光體RGY，其中該混合螢光體RGY係包含紅色螢光體pR、 綠色螢光體PG及黃色螢光體PY之混合結果。 在上述的白光發光二極體單元2中設有導線部份（未圖 示），可將藍色發光二極體LB之陰極及陽極連接到基材2 〇的 電連接部份（未圖示），以將電力供應到藍色發光二極體LB 上。然而有關於藍色發光二極體L B之電極連接技術係為習 一技藝，並非本案重點，因此在此不在贅述。再者，上述圖 示^白光發光二極體皁元為表面安裝型封裝，但是須知該 白光發光二極體單元亦可以為其他形式封裝，如燈泡型封 ^前述之藍光LED晶片LB精通電流而出射藍色光線時， ^ :=發前述之混合螢光體RGY中的紅色螢光體pR、綠色 J 2 PG及黃色螢光體PY，並產生紅色光、綠色光及黃色 尤出射光線。 極體ί見！ Ί為本！明之較佳具體實例之白光發光二 般早π 2之發射光譜，由左至右分別发 之光譜、！亲色螢光體PG之發射光;^色發光一極體 光譜與紅色榮光體PR之發射光色榮光體ΡΥ之發射 見第—Β圖）’本發明白光發二搞〃 '知技術之光譜（參 括更廣闊的可見光波段，因此且° I兀2之發射光譜涵 為—般而言螢光體之發射光譜、_ 乂 \之演色性。再者，因 廣，因此可以達成更佳之演色性' *〜極體之發射光譜寬 因單純使用黃色光螢光體時並 才八白色光之演色性不佳，EuMnMgCSiO4) ^ 2. However, it should be noted that in addition to the aforementioned phosphors, there are two other available phosphors, but this does not mean that the invention is limited to the above phosphors and also includes other wavelengths that can be excited by the blue light (400-490 nm). Phosphors, materials. Refer to FIG. 4A, which is a schematic diagram of a white light emitting diode unit 2 according to another preferred embodiment of the present invention. The white light emitting diode unit includes a substrate 20 (for example, an n-edge substrate) and a blue light emitting diode LB (which can be made of a nitride-based compound semiconductor) on the substrate 20 4. Description of the invention (4)), and a red, green and yellow mixed phosphor RGY on the blue light-emitting diode LB, wherein the mixed phosphor RGY includes a red phosphor pR, a green phosphor PG and yellow phosphor PY mixed results. A lead portion (not shown) is provided in the white light emitting diode unit 2 described above, and the cathode and anode of the blue light emitting diode LB can be connected to the electrical connection portion of the substrate 2 (not shown) ) To supply power to the blue light emitting diode LB. However, the electrode connection technology of the blue light-emitting diode L B is a skill and is not the focus of this case, so it will not be repeated here. In addition, the above figure ^ white light emitting diode saponin is a surface mount type package, but it must be noted that the white light emitting diode unit can also be packaged in other forms, such as a bulb type package ^ The aforementioned blue light LED chip LB is proficient in current When emitting blue light, ^: = emits the red phosphor pR, green J 2 PG, and yellow phosphor PY of the aforementioned mixed phosphor RGY, and produces red, green, and yellow, especially emitted light. See you! ΊBased! The bright and specific example of the white light emission is generally as early as the emission spectrum of π 2, the spectrum from left to right, respectively! The emission light of the luminescent phosphor PG; the color spectrum of the luminescent color monopolar body and the emission light of the red glory PR the emission of the color glory body PΥ (see Figure -B)) 'The white light emission of the present invention is discussed in the' Technical spectrum (Refer to a wider visible light band, and therefore the emission spectrum of ° I 2 is-in general, the emission spectrum of a phosphor, and the color rendering of _ 乂 \. Furthermore, because of the wide range, better color rendering can be achieved '* ~ The wide emission spectrum of the polar body is because the color rendering of white light is not good when only yellow light phosphors are used.
第9頁 200532934 五、發明說明（5) 因此在螢光膠中加入紅、綠色光螢光體以增加其演色性。 而將紅、黃、綠色螢光體依適當的比例混合作調配即可得 白光或調各種色溫、色光。 本發明之紅色、綠色及黃色混合之螢光體RGY$，該紅 色酱光體可採用CaS : Eu或SrS ·· Eu ;黃色螢光體可採用YAG :(：6或TbAG:Ce;而綠色螢光體可採用SrGa2S4:Eu或 ^asEUaMnMg(Sl〇4)4Ci2。但是須知除了前述之螢光體外尚有 其他可用之螢光體，但並不代表本案發明只限用上述螢光 體^亦包括了其他可被藍光波長（4 0 0 — 4 9 〇 nm)範圍激發之螢 光體材料。 # $ΐ所述，本發明之白光發光二極體單元，可兼具發光 及’貝色性，實為一不可多得之發明發明產品，極具產業 、心钇^性、、新穎性及進步性，完全符合發明專利申請要件， 明者和法提出申請，敬清咩查並賜準本案專利，以保障發 本# Ϊ權益。然以上所述，僅為本發明之較佳實施例，凡依 ^ ^申請專利範圍所做之均等修飾與變化，皆應屬本發 明專利之涵蓋範圍。Page 9 200532934 V. Description of the invention (5) Therefore, red and green phosphors are added to the fluorescent glue to increase its color rendering. The red, yellow, and green phosphors can be mixed in an appropriate ratio to obtain white light or various color temperatures and colors. In the red, green and yellow mixed phosphor RGY $ of the present invention, the red saucer can use CaS: Eu or SrS ·· Eu; the yellow phosphor can use YAG :(: 6 or TbAG: Ce; and green The phosphor can be SrGa2S4: Eu or ^ asEUaMnMg (S104) 4Ci2. However, it should be noted that there are other phosphors available in addition to the foregoing fluorescent bodies, but it does not mean that the present invention is limited to the above-mentioned phosphors ^ also Including other phosphor materials that can be excited in the range of blue light wavelength (400-4.9 nm). As described in the above description, the white light-emitting diode unit of the present invention can have both luminescence and 'beige color' It is a rare invention product, which is extremely industrial, innovative, and progressive, and fully meets the requirements of the invention patent application. The applicant and the law filed an application, respectfully investigate and grant the case. Patent to protect the rights and interests of the issued # 然. However, the above is only a preferred embodiment of the present invention. Any equal modification and change made in accordance with the scope of patent application should be covered by the patent of the present invention.
第10頁 200532934 圖式簡單說明 圖示說明： 第一A圖為一習知白光單元之示意圖。 第一 B圖為該習知白光單元之光譜圖。 第二圖為另一習知白光單元之示意圖。 第三圖為依據本發明之一較佳具體實例之示意圖。 第四A圖為依據本發明之另一較佳具體實例之示意圖。 第四B圖為第四A圖元件之光譜圖。 元件符號說明： 【習知】 11封裝膠體 LG綠色發光二極體 PY黃色螢光體 PG綠色螢光體 LB藍色發光二極體 PR紅色螢光體 RGY混合螢光體 10基材 LR紅色發光二極體 LB藍色發光二極體 PR紅色螢光體 【本發明】 2 0基材 PY黃色螢光體 P G綠色螢光體Page 10 200532934 Brief description of the drawings Illustration: The first diagram A is a schematic diagram of a conventional white light unit. The first B diagram is a spectrum diagram of the conventional white light unit. The second figure is a schematic diagram of another conventional white light unit. The third figure is a schematic diagram of a preferred embodiment according to the present invention. FIG. 4A is a schematic diagram of another preferred embodiment according to the present invention. The fourth diagram B is a spectrum diagram of the fourth diagram A element. Description of component symbols: [Knowledge] 11 encapsulated colloid LG green light emitting diode PY yellow phosphor PG green phosphor LB blue light emitting diode PR red phosphor RGY mixed phosphor 10 substrate LR red light emitting Diode LB blue light emitting diode PR red phosphor [Invention] 2 0 substrate PY yellow phosphor PG green phosphor