TW200536140A

TW200536140A - Light emitting device

Info

Publication number: TW200536140A
Application number: TW93111734A
Authority: TW
Inventors: Kun-Zhui Li; zi-qi Zheng; rong-bin Zheng
Original assignee: Kun-Zhui Li; zi-qi Zheng; rong-bin Zheng
Priority date: 2004-04-27
Filing date: 2004-04-27
Publication date: 2005-11-01
Also published as: TWI247436B

Abstract

The present invention provides a light emitting device, which comprises: at least more than one blue LED for emitting blue light; at least more than one red LED for emitting red light; and, the fluorescence is mixed by the green-yellow fluorescence and the blue fluorescence; the fluorescence could absorb the blue light to excite the fluorescence a first mixing light with different wavelength from the wavelength of the blue light, and then mixing the first mixing light with the red light emitted from the red LED to release a second mixing light, and providing the second mixing light with excellent hue and color saturation.

Description

200536140 五、發明說明（ο 【發明所屬之技本發明係在佳的第二混合光【先前技術】按習知之發日本日亞化告號第3 8 3 5 該案僅利用單一以激發黃色螢光單一波長的光與差’即；白色光【發明内容】本發明在提由綠黃色螢光體 E D發出的藍光色與藍色波長的光L E D發出的「第二混合光」本發明的再體由綠黃色螢光成，由藍光L E 激發出綠黃光、混合光與紅光L |和度佳的「第二術領域】提供—種發光裝置，特指一種可得演色性供釋出。 ' 光裝置，其典型之範例如：學工業股份有限公司所申請之台灣專利公〇 8號「發光裝置及顯示裝置」專利案，藍色光源之藍光半導體，藉發射出之藍光層產生不同波長的白光顯現，由於僅具部份未被激發的藍光混合，故其演色性失真不純。供一種發光裝置，特指一種藉著螢光體是及藍色螢光體彼此混合而成，再由藍光L ^激發該螢光體，使螢光體被激發出綠黃第一混合光」，該「第一混合光」與紅紅光混合，可得演色性及色彩飽和度佳的為其主要目的。一目的即在提供一種發光裝置，藉著螢光體、藍色螢光體及紅色螢光體彼此混合而 D發出的藍光去激發螢光體，使螢光體被藍光及紅光等波長的第一混合光，該第一 E D發出的紅光混合可得演色性及色彩飽混合光」者為其再一目的。圓200536140 V. Description of the invention (ο [Technology to which the invention belongs The second mixed light of the invention [Prior technology] According to the conventional Japanese Nichia No. 3 8 3 5 This case only uses a single to excite yellow fluorescent light Light with a single wavelength of light and difference 'that is; white light [Content of the invention] In the present invention, the "second mixed light" emitted by the blue light color and the blue wavelength light LED emitted by the green-yellow phosphor ED The body is made of green-yellow fluorescent light, and the green-yellow light, mixed light and red light L are excited by the blue light LE. The "second field" provides a kind of light-emitting device, especially a kind of available color rendering for release. ”Optical devices, typical examples of which are: Taiwan Patent No. 08" Light-Emitting Device and Display Device "patent filed by Xue Industrial Co., Ltd., blue light semiconductors with blue light sources are different by emitting blue light layers. The white light of the wavelength appears, and since only a part of the unexcited blue light is mixed, the color rendering distortion is not pure. For a light-emitting device, specifically a kind of phosphor and blue phosphor mixed with each other Then, the phosphor is excited by the blue light L ^, and the phosphor is excited to produce a green-yellow first mixed light ", and the" first mixed light "is mixed with red and red light to obtain color rendering and color saturation The main purpose is to provide a light-emitting device, in which the blue light emitted by D is used to excite the phosphor by mixing the phosphor, the blue phosphor, and the red phosphor with each other, so that the phosphor is The first mixed light of blue and red wavelengths, and the red light emitted by the first ED can be mixed to obtain color rendering and color-saturated mixed light. "

200536140 五、發明說明（2) 本發明光元件增加混合光混合其再一目的本發明如圖一發明在提供 D 1 〇可至少一螢光體彼此混合而 (Aluminate 藍色螢其致活物為該螢光俾可吸收藍 1 5波長不 L E D 2 0 9 0者；其中螢發出的綠黃 m之間（如藍色螢定波長介於的再一目的設置一綠黃 ’可得演色〇為達上述目、二所述係一種發光裝發出藍光1 個以上的紅 5 0是由綠成；其中該 )材料構成光體5 3由銪（Eu); 體5 0係被，即在提供一種發光裝置，色L E D，其所發出綠黃光^ I 性及色彩飽和度佳的第二⑺ 一此合光為的，热配合圖式詳述如後：為本發明一較佳可行的實施例，置I至少包含一個以上的藍光5，光LED20可發出紅光· 貫色螢光體5 2及藍色營光體5 綠黃色螢光體5 2由鋁酸鹽系 1其致活物為飾（C e ); ' 鋁酸鹽系（Aluminate)材料構成，覆接於藍光LED10的上表面，螢光體5 0被激發出一種盘誌同的第-混合光8 〇，第一混合光8 〇、；紅光光2 5再相混合釋出第二混合光光1 使所發出的紅光體5 0中光 5 2 1，圖三所示）光體5 3被 4 5 0 〜5 的綠黃色螢光體5 2被藍光工其選定波長介於5 0 〇〜5 § 藍光1 5激發出的藍光5 3工〇〇 n m之間； 5激 5 η 其選200536140 V. Description of the invention (2) The light element of the present invention is added with mixed light and mixed for another purpose. The present invention is shown in Fig. 1. The invention provides D 1 0. At least one phosphor can be mixed with each other. The fluorescent fluorescein can absorb blue 15 wavelengths without LED 2 0 9; among them, the green and yellow m emitted by the fluorescent light (for example, if the blue fluorescent wavelength is set for another purpose, a green and yellow color can be set to obtain a color rendering 〇 Achieving the above objectives and two is a kind of light emitting device that emits more than one blue light. Red 50 is made of green; in which) the material is composed of light body 5 3 is made of erbium (Eu); body 50 is a quilt. A light-emitting device, a color LED, which emits green and yellow light ^ I second and good color saturation. This is a combination of light, and the heat-matching pattern is described in detail below. This is a preferred embodiment of the present invention. The device I contains at least one or more blue light 5, and the light LED 20 can emit red, trans-colored phosphors 5 2 and blue camp phosphors 5 green-yellow phosphors 5 2 made of aluminate 1 and its activation substance is Decoration (C e); 'Aluminate material (Aluminate) material, covering the upper surface of the blue LED10 The phosphor 50 is excited to produce the first mixed light 8 0, the first mixed light 8 0, and the red light 2 5 are mixed to release the second mixed light 1 to make the red light emitted. Light body 5 0 Medium light 5 2 1 (shown in Figure 3) Light body 5 3 is 4 5 0 ~ 5 green-yellow phosphor 5 2 is blue light and its selected wavelength is between 50 0 ~ 5 § Blue light 1 5 Excited blue light between 53 nm and 500 nm;

200536140 五、發明說明（3) 該二種不同的顏色的光波長組合，以形成第一混合光 8 0° 依據前述所述主要特徵，如圖八所示，其中螢光體 5 0材料中，可增加一紅色螢光體5 1俾與原有的綠黃色螢光體5 2及藍色螢光體5 3相混合成；該紅色螢光體 5 1被藍光1 5激發出的紅光5 1 1 ，其選定波長介於 585〜700nm之間。依據前述所述主要特徵，其中可增設一綠黃色L E D 30，可發出綠黃光3 5 ，其選定的波長介於500〜 5 8 5 n m之間（如圖八所示）。依據前述所述主要特徵（如圖三所示），其中光源為藍光15，其選定的發光波長介於400〜480nm之間，光源為紅光2 5其選定的光波長介於5 8 5〜7 8 0 n m間。依據前述所述主要特徵，其中螢光體5 0中之綠黃色、藍色及紅色螢光體52 、53 、51 ，可由下列材料來選擇單一或組合使用： (1) ·鋁酸鹽系；（2 ) ·矽酸鹽系；（3 ) ·磷酸鹽系；（4 ) · 硼酸鹽系；（5 )·硫化物系。【實施方式】 (1).如圖一所示，藍光LED10及紅光LED20被裝置於一反射蓋6 0中，其中藍光LED 1 0的上表面，可被螢光體5 0覆接，另外再藉透明膠6 5封裝於反射蓋60的凹槽6 1中，俾以將藍光LED1 0及200536140 V. Description of the invention (3) The two different colors of light wavelengths are combined to form the first mixed light 80 °. According to the aforementioned main features, as shown in FIG. 8, where the phosphor 50 material, A red phosphor 5 1 俾 can be added to mix with the original green-yellow phosphor 5 2 and blue phosphor 5 3; the red phosphor 5 1 is excited by blue light 15 and red light 5 1 1, the selected wavelength is between 585 ~ 700nm. According to the aforementioned main features, a green-yellow LED 30 can be added to emit green-yellow light 3 5 with a selected wavelength between 500 and 5 8 5 n m (as shown in FIG. 8). According to the aforementioned main features (as shown in Figure 3), the light source is blue light 15 and its selected light emission wavelength is between 400 and 480 nm, and the light source is red light 2 5 and its selected light wavelength is between 5 8 5 and 7 Between 80 nm. According to the foregoing main features, the green-yellow, blue, and red phosphors 52, 53, and 51 in the phosphor 50 can be selected singly or in combination from the following materials: (1) Aluminates; (2) · Silicate system; (3) · Phosphate system; (4) · Borate system; (5) · Sulfide system. [Embodiment] (1). As shown in FIG. 1, the blue LED 10 and the red LED 20 are installed in a reflective cover 60, wherein the upper surface of the blue LED 10 can be covered by the phosphor 50, and Then, the transparent glue 6 5 is packaged in the groove 6 1 of the reflection cover 60, and the blue LED 10 and

200536140 五、發明說明（4) 紅光LED2 0封裝。針對藍光LED 1 〇及紅光L ED20施以電極；如圖二所示，藍光LED1 〇會發出波長介於400〜48〇nm的藍光15 ;螢光體5 0係由綠黃色螢光體5 2及藍色螢光體5 3二者混合而成，其中綠黃色螢光體5 2吸收了一部份的藍光1 5而被激發出波長介於5 0 0〜5 8 5 n m之間的綠黃光5 2 1 ，藍色螢光體5 3吸收了一部份的藍光1 5 ，而被激發出波長介於4 5 0〜5 0 0 nm之間的藍光5 3 1 ，被激發出的綠黃光5 2 1與藍光5 3 1等二種不同波長的混合以形成第一混合光8 0供釋出。紅光LED20發出波長介於585〜780 n m之間的紅光2 5 ，該紅光2 5與第一混合光8 0 再混合可得第二混合光9 0者。如圖三所示係指光源為藍光1 5及紅光2 5及被激發出的綠黃光5 2 1 、藍光5 3 1各自獨立且未混合前的波形曲線圖，該圖可知二光源的藍光1 5、紅光2 5與被動發光的綠黃光5 2 1及藍光5 3 1等四者均具有特定的「波長」及「發光強度」。第四圖所示，係為藍光1 5 、紅光2 5與綠黃光5 2 1及藍光5 3 1混合後的曲線圖，該第二混合光9 0 被混合形成，其綜合波長平均值介於4 0 0〜7 0 0 n m之間，請再參閱圖四係第二混合光9 0與假想線所示的太陽光光譜9 5 (即自然光）做比較，可知第二混合光9 0與太陽光光譜9 5在介於4 0 0〜6 8200536140 V. Description of the invention (4) Red LED20 package. Electrodes are applied to the blue LED 100 and the red LED 20; as shown in FIG. 2, the blue LED 100 emits blue light 15 with a wavelength of 400 to 48 nm; the phosphor 50 is a green-yellow phosphor 5 2 and blue phosphor 5 3 are mixed, in which the green-yellow phosphor 5 2 absorbs a part of the blue light 15 and is excited to a wavelength between 50 0 to 5 8 5 nm The green and yellow light 5 2 1 and the blue phosphor 5 3 absorb a part of the blue light 1 5 and are excited by the blue light 5 3 1 with a wavelength between 4 50 and 50 nm. The green and yellow light 5 2 1 and the blue light 5 3 1 are mixed at two different wavelengths to form a first mixed light 80 for release. The red LED 20 emits a red light 25 with a wavelength between 585 and 780 nm, and the red light 25 is mixed with the first mixed light 80 to obtain a second mixed light 90. As shown in Figure 3, it refers to the waveform curves of the blue light source 15 and red light 2 5 and the excited green and yellow light 5 2 1 and blue light 5 3 1 before being mixed separately. Each of the blue light 15, the red light 25, and the passive light green and yellow light 5 2 1 and the blue light 5 3 1 has a specific "wavelength" and "luminous intensity". As shown in the fourth figure, it is a graph after mixing blue light 1 5, red light 2 5 with green and yellow light 5 2 1 and blue light 5 3 1. The second mixed light 90 is mixed to form an average value of integrated wavelengths. It is between 4 0 ~ 7 0 0 nm. Please refer to Figure 4 for the second mixed light 9 0 and the sunlight spectrum 9 5 (natural light) shown in the imaginary line. It can be seen that the second mixed light 9 0 With sunlight spectrum 9 5 in between 4 0 0 ~ 6 8

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0 n m之可見光區域的演色性極高，因此本案所達的第二混合光9 〇其色彩（如白光）的演色性更接於自然光’而屬於色彩的飽和度佳。 (2)·榮光體5 0基本上是由綠黃色螢光體5 2及藍色勞體5 3均勻混合而成，二者係依其元素成份"比例值的不/同而有不同的致光顏色反應，綠黃色螢光體5 2的又光致顏色為綠黃光，藍色螢光體$ 3的受光致顏色為藍光’故綠黃色螢光體5 2及藍色螢光體5 3 可選擇採相同的材料元素，但二者的成份比例不同，即會產生不同的光致顏色。本案螢光體5 〇的材料可採用下列的一種或多種元素的組合（丨）·鋁酸鹽系 (Aluminate) ; (2)·矽酸鹽系（Si 1 icates ) ; (3).石粦酸鹽系（Phosphates) ; (4)·硼酸鹽系（Bornates); (5)·硫化物系（Sulfides)。如圖五所示係為本案另一較佳可行的實施例，榮光體 5 0中可增加另一紅色螢光體5 1的混合，其中該紅色螢光體5 1係由MgF2 · MgO · Ge02 : Μη材料構成，俾與上述的綠黃色螢光體5 2及藍色螢光體5 3相混合 ;藉此當螢光體5 0受藍光1 5光源的激發時，乃合被激發出紅光5 1 1 、藍光5 3 1及綠黃光5 2 1 ^ 混合成第一混合光8 0 ，因此第一混合光8 〇 >具備有紅光511、藍光531及綠黃光521三者不同波長的混合光，其中紅光5 1 1的光波長介於5 8 5〜7 〇〇nm之間，如圖六所示，光源為藍光1The color rendering of the visible light region of 0 nm is extremely high. Therefore, the color mixing of the second mixed light (such as white light) achieved in this case is more close to natural light and belongs to color saturation. (2) · Glorious body 50 is basically made of green-yellow phosphor 52 and blue labor body 5 3, which are different according to their elemental composition " ratio value. Photochromic reaction, the photochromic color of green-yellow phosphor 5 2 is green-yellow, and the photochromic color of blue phosphor $ 3 is blue-light, so green-yellow phosphor 5 2 and blue phosphor 5 3 You can choose to use the same material elements, but the composition ratios of the two will produce different photochromic colors. The material of the phosphor 50 in this case may use a combination of one or more of the following elements (丨) · Aluminate (Aluminate); (2) · Silicate (Si 1 icates); (3). Phosphates; (4) Borates; (5) Sulfides. As shown in FIG. 5, it is another preferred and feasible embodiment of the present invention. A mixture of another red phosphor 51 can be added to the glory body 50. The red phosphor 51 is composed of MgF2 · MgO · Ge02. : Mn material, mixed with the green-yellow phosphor 5 2 and blue phosphor 5 3 mentioned above; thereby, when phosphor 50 is excited by blue light source 15, it is excited to emit red Light 5 1 1, blue light 5 3 1 and green-yellow light 5 2 1 ^ are mixed into the first mixed light 8 0, so the first mixed light 8 〇> has three red light 511, blue light 531 and green and yellow light 521 Mixed light of different wavelengths, where the light wavelength of the red light 5 1 1 is between 5 8 5 and 700 nm, as shown in Figure 6, the light source is blue light 1

第9頁 200536140 五、發明說明（6) 、紅光2 5及綠黃光3 5各自獨立且未混合前的波長區域及相對的發光強度，以及被激發的藍光5 3 1 、被激發出的綠黃光5 2 1及被激發的紅光5 1 1其波長區域及相對的發光強度，第六圖可知，這六種不同的光均具有特定的波長及發光強度。如圖九所示係為本案另一較佳可行的實施例，其中螢光層5 0係直接封裝於綠黃光L E D 3 0、紅光L E D20及藍光LED10上。本案在反射蓋60中，特別選擇加裝了一綠黃色LED3 0可選定波長介於 5 0 0〜5 8 5 n m之間的綠黃光3 5做為另一光源，如圖八、九所示，藉此綠黃光35、紅光25及藍光1 5等三光源一併與前述的第一混合光8 0 /混合可得第二混合光9 0 /其波長的曲線如第七圖所示，藉由第七圖與第四圖中的第二混合光9 0 /、9 0兩者波形的比較，可知第七圖中的第二混合光9 0 >增加了紅光2 5部份的波形強度以及增加了綠黃光3 5 的波形強度，因此第七圖中第二混合光9 0 /與太陽光譜9 5 (即自然光）做比較，可知第二混合光9 0 /與太陽光譜9 5在介於4 0 0〜6 8 0 nm之間的可見光區域之相似率極高，因此第二混合光9 0 /其色彩（如白光）的演色性更接近於自然光，色彩之飽和度更佳。Page 9 200536140 V. Description of the invention (6), the red light 25 and the green and yellow light 3 5 are independent and unmixed wavelength regions and relative luminous intensity, and the excited blue light 5 3 1 and the excited light The wavelength range and relative luminous intensity of the green-yellow light 5 2 1 and the excited red light 5 1 1 are shown in the sixth figure, and the six different types of light have specific wavelengths and luminous intensities. As shown in FIG. 9, it is another preferred and feasible embodiment of the present invention, in which the fluorescent layer 50 is directly packaged on the green and yellow LED E D 3 0, the red LED E D20, and the blue LED 10. In this case, a green-yellow LED 3 0 is specially installed in the reflection cover 60, and a green-yellow light 3 5 with a wavelength between 50 0 to 5 8 5 nm can be selected as another light source, as shown in Figures 8 and 9 The three mixed light sources such as green-yellow light 35, red light 25, and blue light 15 are combined with the first mixed light 8 0 / to obtain a second mixed light 9 0 / whose wavelength curve is as shown in the seventh figure. It is shown that by comparing the waveforms of the second mixed light 9 0 /, 9 0 in the seventh and fourth figures, it can be seen that the second mixed light 9 0 in the seventh figure is increased by 25 parts of red light. And the waveform intensity of the green and yellow light 3 5 is increased, so the second mixed light 9 0 / in the seventh figure is compared with the solar spectrum 9 5 (that is, natural light). It can be seen that the second mixed light 9 0 / and the sun The similarity rate of the spectrum 9 5 in the visible light region between 4 0 to 6 8 0 nm is extremely high, so the color rendering of the second mixed light 9 0 / its color (such as white light) is closer to natural light and the color is saturated Degree is better.

第ίο頁 200536140 圖式簡單說明第一圖為本發明裝置的一斷面圖。弟一圖為本發明的演色混合的流程方塊圖。第三圖為本發明發光L E D主動發光與螢光體被動發光的各獨立的光波長曲線圖。第四圖為本發明第二混合波長的曲線圖。第五圖為本發明螢光體增加紅色螢光體後的演色混合流程方塊圖。弟六圖為本發明第二混合波長與太陽光（daylight)波形比較的曲線圖。第七圖為本發明增加了被動紅光及綠黃光源混合後第二混合波長的曲線圖。第八圖為本發明另一實施例的流程方塊圖。第九圖為本發明裝置的另一實施斷面圖。元件編號：藍光L E D 藍光-- 紅光L E D 紅光〜__ 1122 綠黃色LED--3 螢光體-----5 紅色螢光體---5 綠黃螢光體---5 0 50 50 2Page ί 20052005140 Brief description of the drawings The first figure is a sectional view of the device of the present invention. This figure is a block diagram of the color rendering mixing process of the present invention. The third figure is an independent light wavelength curve chart of the light emitting LED active light emission and the phosphor passive light emission of the present invention. The fourth figure is a graph of the second mixed wavelength of the present invention. The fifth figure is a block diagram of a color rendering mixing process after the phosphor of the present invention is added with a red phosphor. Figure 6 is a graph comparing the second mixed wavelength of the present invention with the waveform of daylight. The seventh figure is a graph of the second mixed wavelength after the passive red and green-yellow light sources are added in the present invention. The eighth figure is a flow block diagram of another embodiment of the present invention. The ninth figure is a sectional view of another embodiment of the device of the present invention. Component Number: Blue L E D Blue-Red L E D Red ~ __ 1122 Green Yellow LED--3 Phosphor ----- 5 Red Phosphor --- 5 Green Yellow Phosphor --- 5 0 50 50 2

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Claims

200536140 六、申請專利範圍 1· 一種發光裝置，乃包含：至少包含一個以上的藍光LED，可發出藍光；至少一個以上的紅光L E D，可發出紅光；螢光體是由綠黃色螢光體及藍色螢光體彼此混合而成 ’其中该綠黃色螢光體由I呂酸鹽系（A 1 u m丨n a t e )材料構成，其致活物為飾（C e ); 藍色螢光體由鋁酸鹽系（Aluminate)材料構成，其致活物為銪（E u ); 該螢光體係被覆接於藍光L E D的上表面，俾可吸收藍光，使螢光體被激發出一種與藍光波長不同的第一混合光，第一混合光與紅光L E D所發出的紅光再相混合釋出第二混合光者；其中螢光體中的綠黃色螢光體被藍光激發出的綠黃光 ’其波長介於5〇〇〜585nm之間；藍色螢光體被藍光激發出的藍光其波長介於 5 0 0 n m之間； δ玄一種不同的顏色的光波長組合，以形成第一混合光 2 .依據申請專利範圍第1項所述之白光發光裝置，豆中 ί 3 Ϊ料中’可增加一紅色螢光體俾與原有的綠黃光激私+及藍色螢光體相混合成；該紅色螢光體被藍間。出的紅光’其波長介於5 8 5〜7 〇〇 n m之 .依據中請專利範圍第1或2項所述之白光發光裝置，200536140 VI. Scope of patent application 1. A light-emitting device includes: at least one blue LED, which can emit blue light; at least one red LED, which can emit red light; the phosphor is a green-yellow phosphor And blue phosphors are mixed with each other 'wherein the green-yellow phosphor is composed of I Lumate (A 1 um 丨 nate) material, and its living thing is decorated (C e); blue phosphor It is composed of aluminate material, whose activation substance is Eu (Eu); The fluorescent system is covered on the upper surface of the blue LED. The europium can absorb blue light, and the phosphor is excited to emit a kind of blue light. The first mixed light with different wavelengths, the first mixed light and the red light emitted by the red LED are mixed to release a second mixed light; wherein the green-yellow phosphor in the phosphor is green-yellow excited by the blue light Light 'has a wavelength between 500 and 585 nm; blue light excited by blue light has a wavelength between 500 nm; δ is a combination of light wavelengths of different colors to form the first A mixed light 2. According to the first patent application scope The white light-emitting device described above can be added to a red phosphor in the bean 3 to mix with the original green-yellow light-stimulating light + and blue phosphor; the red phosphor is . The emitted red light ’has a wavelength ranging from 5 8 5 to 7 〇 n m. According to the white light emitting device described in item 1 or 2 of the patent scope,

第13頁 200536140 六、申請專利範圍其中可增設一綠黃色LED，可發出綠黃光，其光波長介於5 0 0〜5 8 5 nm之間。 4 ·依據申請專利範圍第1項所述之白光發光裝置，其中光源為藍光，其選定的發光波長介於4 0 0〜4 8 0 n m之間，光源為紅光其選定的光波長介於5 8 5〜 7 8 0 n m 間。 5 ·依據申請專利範圍第1或2項所述之白光發光裝置，其中螢光體中之綠黃色、藍色及紅色螢光體，可由下列材料來選擇單一或組合使用： (1) ·鋁酸鹽系；（2 ) ·矽酸鹽系；（3 ) ·磷酸鹽系；（4 ) · 硼酸鹽系；（5 )·硫化物系。Page 13 200536140 6. Scope of patent application Among them, a green-yellow LED can be added to emit green-yellow light, and its light wavelength is between 500 and 5 8 5 nm. 4 · The white light emitting device according to item 1 of the scope of the patent application, wherein the light source is blue light, and the selected light emission wavelength is between 4 0 ~ 4 8 0 nm, and the light source is red light, and the selected light wavelength is 5 Between 8 5 and 7 8 0 nm. 5. The white light emitting device according to item 1 or 2 of the scope of the patent application, in which the green-yellow, blue and red phosphors in the phosphor can be selected singly or in combination from the following materials: (1) Aluminum Acid salt system; (2) • Silicate system; (3) • Phosphate system; (4) • Borate system; (5) • Sulfide system.

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