201220551 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種二極體，特別是指一種發光二極體。 [先前技術] [0002] 發光二極體憑藉其高光效、低能耗、無污染等優點，已 被應用於越來越多的場合之中，大有取代傳統光源的趨 勢。 [0003] 發光二極體是通過採用電流激發其發光晶片的方式進行 發光。由於晶片的材料限制，其通常僅能發出單一顏色 的光。為獲得某些特定的顏色，通常還會在發光二極體 内掺雜相應的螢光粉，以通過螢光粉的轉換來改變原有 光線的顏色。比如，最常見的白光發光二極體就是採用 藍光晶片加黃色螢光粉的方式來獲得白光的。 [0004] 為使輸出光的顏色更加多樣化，有業者設計出一種顏色 調節裝置。該種顏色調節裝置為具有多個設有不同螢光 粉區域的輪盤狀結構。該輪盤可繞其中心軸旋轉，使發 Ο 光二極體正對於不同的螢光粉區域，從而使最終混光的 顏色發生變化。然而，此種顏色調節裝置由於需驅動輪 盤轉動，導致控制較為複雜，成本偏高。 【發明内容】 [0005] 因此，有必要提供一種顏色可變的發光二極體，其控制 較為簡單。 [0006] 一種發光二極體，包括基座、固定在基座上的引腳、電 連接引腳的發光晶片及封裝體，該封裝體包括第一區域 099137387 表單編號A0101 第3頁/共15頁 0992065182-0 201220551 及第二區域，第一區域内摻雜有第一螢光粉，該第一螢 光粉受激發所輻射出的光的波長與發光晶片的光的波長 不同，第一區域及第二區域中的其中之一設置有透光的 光調節結構，該光調節結構由電致變色材料製成，該電 致變色材料在電流的作用下可改變其顏色及透光率中的 至少其中之一。 [0007] [0008] [0009] 由於電致變色材料的顏色或逯光率受電流作用可發生變 化，第一區域及第二區域中彀置有光調節結構的其中一 個區域所發出的光在經由其調整之後再與另外一個區域 發出的光進行混合，從而得到不同顏色的混光。由於僅 需通過輸人電流就可改變發先二極體的出錢色，因此 控制較為簡單。 【實施方式】 請參閱圖卜3，示出了本發明的發光二極體。該發光二極 體包括-基座1G、二固定於基座1()上的引腳2()、一電連 接二引腳20的發光晶片3〇、1蓋發光晶片期封裝體 40及-置於封裝體40上的光調節結構5〇。 該基座10由塑膠、陶瓷或其他合適的材料所製成。基座 10在其頂面開設有一凹槽（圖未標），用於收容發光晶片 30。該凹槽的内逕自下至上逐漸增大，從而形成傾斜的 内側壁面。二引腳20穿設於基座10内且彼此隔開，以避 免短路。每一引腳2〇包括一暴露在凹槽底面的輸入段22 、一暴露在基座1〇底面的接觸段24及一連接接觸段24及 輸入段22的連接段26。該輸入段22平行於接觸段24並垂 直於連接段26。接觸段24用於與外部的電路結構連接以 099137387 表單編號A0I01 第4頁/共15頁 0992065182-0 201220551 將電流輸入進發光二極體内。連接段26穿設於基座10内 部以將電流從接觸段2 4傳輪至輸入段2 2。 [0010] 該發光晶片30黏接於基座1〇的凹槽底面。該發光晶片 由半導體發光材料所製成，如氮化鎵、氮化銦鎵、氮化 鋁銦鎵、磷化鎵、砷化鋁鎵、磷化鋁鎵銦等。優選地， 本實施例採用可發出藍光的氮化鎵作為發光晶片3〇的材 料。該發光晶片30的二電極（圖未示）通過二金線32分別 連接至二引腳20的輸入段22表面，以完成與引腳20的電 ο [0011] 性連接。 該封裝體40由透明的材料所製成，如玻璃、環氧樹脂、 聚碳酸酯或聚甲基丙烯酸曱酯等。封裝體4〇填充基座10 的凹槽並覆蓋住發光晶片30及金線32 »封裝體40包括第 一區域42及環繞第一區域42的第二區域44。封裝體40的 第一區域42呈圓形，其内部填充有第一榮光粉6〇。封裝 體40的第二區域44呈環形，其内部填充有第二螢光粉62 。第一螢光粉60與第二螢光粉42由輻射頻譜不同的螢光 ο 材料所製成，比如纪銘石榴石、氮化物、氮氧化物及矽 酸鹽化合物等，具體取決於實際需求《優選地，本發明 採用Y3Al5〇i2:Ce作為第一螢光粉60的材料，採用 CaAlSiN3:Eu作為第二螢光粉62的材料。由此，發光晶 片30所發出的藍光經過第一螢光粉6〇吸收後可轉換為黃 光’經過第二螢光粉62吸收後可轉換為紅光。轉換成的 黃光及紅光與剩餘的藍光混合得到色溫大致為4500K的白 光。 [0012] δ玄光調節結構5〇由電致變色（Electrochromism)材料所 099137387 表單編號A0101 第5頁/共15頁 0992065182-0 201220551 製成’其具有在通電後改變顏色或透光率的特性。該電 致變色材料可為採雜子和電子的雙注人及雙抽出進行 光吸收變化的無機電致變色㈣或者採魏化還原反應 進盯光，收變化的有機電致變色材料。具體地，電致變 ° ‘自可在無色及藍色之間變化的三氧化鎢 〇 色與/未藍色之間變化的三氧化鉬（Mo〇 )，可在 無色與藍黑色之間變化的氧化級（Ir〇 )， 3 黑色之間變化《苯胺（⑽灿㈤，僅有透光率發 生變=的氣化錄（Ni〇)，可在無色、藍色及深紅色之間變 化的t羅精(viologen)，可在無色、暗藍色淡綠色之 ，:匕的普魯士藍(Prussian bine)等中的任意一種。 優l地本實施例採用可在無色與藍黑色之間變化的氧 化^作^光調節結構5〇的材料。該光調節結構5〇呈環狀 其中相設有一通孔52。光調節結構50貼設於封裝體 其凡全覆蓋住第二區域44並暴露出第一區域42 [0013] 在未^光調節結構5 〇通電的情況下，其呈現出無色透明 的狀〜由此’自封裝體40第一區域42發出的光可穿過 光調節結構50的通孔52，第二區域44發出的光也可穿過 光調即結構50，二者最終現合為色溫大致為45隨的白光 。在給光調節結構5G通電之後，其轉變為藍黑色。第二 區域44發出的光將被光調節結構5()所阻擋而基本無法透 射出去，僅有第-區域42的光能夠輻射至外部。因此， 最終輸出光將由於紅光的減少而呈現出色溫大致為6l〇〇K 的白光。並且，由於光調節結構5〇的阻擋，後一種情況 099137387 表單編號Α0101 第6頁/共15頁 0992065182-0 201220551 體的光通量、發光效率及演色性等其他光學參 數也與前一種情況不同，具體參見下表.201220551 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a diode, and more particularly to a light-emitting diode. [Prior Art] [0002] Light-emitting diodes have been used in more and more occasions due to their advantages of high luminous efficiency, low energy consumption, and no pollution, and have a tendency to replace conventional light sources. [0003] A light-emitting diode emits light by exciting a light-emitting chip thereof with a current. Due to the material limitations of the wafer, it is typically only capable of emitting a single color of light. In order to obtain certain colors, the corresponding phosphor powder is usually doped in the light-emitting diode to change the color of the original light by the conversion of the phosphor powder. For example, the most common white light-emitting diodes use white light wafers and yellow phosphors to obtain white light. [0004] In order to make the color of the output light more diverse, the manufacturer has devised a color adjustment device. The color adjustment device has a plurality of disk-like structures provided with different phosphor regions. The disc rotates about its central axis, causing the dimming diode to be directed to different phosphor areas, resulting in a change in the color of the final blend. However, such a color adjusting device requires a driving wheel to rotate, resulting in complicated control and high cost. SUMMARY OF THE INVENTION [0005] Therefore, it is necessary to provide a color-variable light-emitting diode, which is relatively simple to control. [0006] A light emitting diode comprising a base, a pin fixed on the base, a light emitting chip electrically connected to the lead, and a package, the package including the first area 099137387 Form No. A0101 Page 3 of 15 Page 0992065182-0 201220551 and the second region, the first region is doped with a first phosphor powder, and the wavelength of the light radiated by the first phosphor is different from the wavelength of the light of the light emitting chip, the first region And one of the second regions is provided with a light-transmitting light-adjusting structure made of an electrochromic material, which can change its color and transmittance under the action of current At least one of them. [0009] [0009] Since the color or the calorificivity of the electrochromic material may be changed by the action of the current, the light emitted by one of the regions of the first region and the second region in which the light-regulating structure is disposed is After it is adjusted, it is mixed with light emitted from another area to obtain mixed light of different colors. Since the output color of the first diode can be changed only by inputting the current, the control is relatively simple. [Embodiment] Referring to Figure 3, a light-emitting diode of the present invention is shown. The light-emitting diode includes a pedestal 1G, two pins 2 () fixed on the susceptor 1 (), a light-emitting chip 3 electrically connected to the two pins 20, and a cover-light-emitting chip package 40 and - The light adjustment structure 5 is placed on the package 40. The base 10 is made of plastic, ceramic or other suitable material. The susceptor 10 has a recess (not shown) on its top surface for receiving the luminescent wafer 30. The inner diameter of the groove gradually increases from bottom to top to form an inclined inner side wall surface. The two pins 20 are disposed in the base 10 and spaced apart from each other to avoid a short circuit. Each pin 2 includes an input section 22 exposed to the bottom surface of the recess, a contact section 24 exposed to the bottom surface of the base 1 and a connecting section 26 connecting the contact section 24 and the input section 22. The input section 22 is parallel to the contact section 24 and is perpendicular to the connecting section 26. Contact section 24 is used to connect to an external circuit structure. 099137387 Form No. A0I01 Page 4 of 15 0992065182-0 201220551 Input current into the LED. The connecting section 26 is threaded through the interior of the base 10 to transfer current from the contact section 24 to the input section 22. [0010] The illuminating wafer 30 is adhered to the bottom surface of the groove of the pedestal 1 。. The luminescent wafer is made of a semiconductor luminescent material such as gallium nitride, indium gallium nitride, aluminum indium gallium nitride, gallium phosphide, aluminum gallium arsenide, aluminum gallium indium phosphide or the like. Preferably, this embodiment employs gallium nitride which emits blue light as a material for the light-emitting wafer 3 turns. The two electrodes (not shown) of the luminescent wafer 30 are respectively connected to the surface of the input section 22 of the two pins 20 through the two gold wires 32 to complete the electrical connection with the pins 20. The package 40 is made of a transparent material such as glass, epoxy, polycarbonate or poly(methacrylate). The package 4 is filled with the recess of the pedestal 10 and covers the luminescent wafer 30 and the gold wire 32. The package 40 includes a first region 42 and a second region 44 surrounding the first region 42. The first region 42 of the package 40 has a circular shape and is filled with a first glare powder 6 内部. The second region 44 of the package body 40 is annular and is internally filled with a second phosphor powder 62. The first phosphor powder 60 and the second phosphor powder 42 are made of fluorescent materials having different radiation spectra, such as Ji Ming garnet, nitride, nitrogen oxides, and niobate compounds, depending on actual needs. Preferably, the present invention employs Y3Al5〇i2:Ce as the material of the first phosphor powder 60, and CaAlSiN3:Eu as the material of the second phosphor powder 62. Thereby, the blue light emitted from the light-emitting wafer 30 can be converted into yellow light after being absorbed by the first phosphor powder 6', and can be converted into red light after being absorbed by the second phosphor powder 62. The converted yellow and red light is mixed with the remaining blue light to obtain white light having a color temperature of approximately 4500K. [0012] The δ black light adjustment structure 5〇 is made of electrochromic material. 099137387 Form No. A0101 Page 5 of 15 0992065182-0 201220551 It is made to have the property of changing color or light transmittance after being energized. The electrochromic material can be an inorganic electrochromic material which adopts double-injection and double-extraction of the hetero- and electron-extracting, and an inorganic electrochromic material which undergoes light absorption change (4) or a reduction reaction. Specifically, electromolytical change "molybdenum trioxide (Mo〇), which varies between colorless and blue without changing between colorless and blue, can change between colorless and blue-black Oxidation grade (Ir〇), 3 changes between blacks (aniline ((10) can (five), only the transmittance change = gasification record (Ni〇), can change between colorless, blue and deep red Viologen, which can be in colorless, dark blue, pale green, or any of Prussian bine, etc. This embodiment uses a change between colorless and blue-black. The light-adjusting structure 5 is annular and has a through hole 52. The light-adjusting structure 50 is attached to the package and covers the second region 44 and is exposed. The first region 42 [0013] in the case where the light-adjusting structure 5 is not energized, it exhibits a colorless transparency - whereby the light emitted from the first region 42 of the package 40 can pass through the light-modulating structure 50. The through hole 52, the light emitted by the second region 44 can also pass through the light tone, that is, the structure 50, and the two are finally combined into a color temperature. 45. White light. After energizing the light adjustment structure 5G, it changes to blue-black. The light emitted by the second region 44 will be blocked by the light-adjusting structure 5() and is substantially incapable of transmitting, only the first-region 42 The light can be radiated to the outside. Therefore, the final output light will exhibit a white light with an excellent temperature of approximately 6l 〇〇K due to the reduction of red light. And, due to the blocking of the light-adjusting structure 5〇, the latter case 099137387 Form No. 1010101 6 Page / Total 15 pages 0992065182-0 201220551 Other optical parameters such as luminous flux, luminous efficiency and color rendering are also different from the previous one. See the table below for details.
[0014] 是否通 光通- ---——_ 電 (lm) 狀態1 未通電1 51 狀態2 -- 通電 45 —[0014] Whether through the light - --- -- _ electricity (lm) state 1 is not powered 1 51 state 2 -- power 45 -
45 色溫（K) 演色性 (Ra) 4500 81 6100 8045 Color Temperature (K) Color Rendering (Ra) 4500 81 6100 80
的—頻4曲線更加較地反映了通電前後輸出光的 從时可明顯看出，在趣節結侧通電之後， 的頻譜曲線湖⑽左右的光強相比狀衂的頻譜曲 ==顯減弱’此正是由於第二區域_紅光被光調節 、、、。構50所阻擋的緣故。 [0015]The -frequency 4 curve reflects more clearly the output light before and after power-on. It can be clearly seen from the time when the interesting knot side is energized, the spectral intensity of the lake (10) is lower than that of the spectrum. 'This is precisely because the second area _ red light is light-regulated, ,,. The reason that the structure 50 blocks. [0015]
备然，發光二極體並不限於上述所揭露的結構，其還可 作根據實際需求作相應的變化。比如，光調節結構50可 以為圓形而改為遮蓋住第—區料並暴露出第二區域44 ，或者第-區域42及第：區賴中僅有_個摻雜有螢光 粉，同樣可達到改變發光二極體顏色的效果。 [_]由於是制對光調節結構5G通電來改變發光二極體的出 光顏色，因此控制較為簡單，可適於產業上的大規模應 用。並且，根據施加電流的大小，光調節結構5〇的顏色 可呈現出漸變的狀態，因此更利於混合出多樣化的出射 光。 _綜上所述’本發明符合發明專利要件，爰依法提出專利 申請。惟，以上所述者僅為本發狀較佳實施例，舉凡 099137387 表單編號A0101 第7頁/共15頁 0992065182-0 201220551 熟悉本案技藝之人士，在爰依本發明精神所作之等效修 飾或變化，皆應涵蓋於以下之申請專利範圍内。 【圖式簡單說明】 [0018] 圖1示出了本發明發光二極體的剖面圖，其中發光二極體 的光調節結構處於未通電狀態。 [0019] 圖2與圖1相似，其中光調節結構處於通電狀態。 [0020] 圖3為圖1中的發光二極體的俯視圖。 [0021] 圖4示出了圖1中的發光二極體在兩種不同狀態下的頻譜 曲線。 【主要元件符號說明】 [0022] 基座：10 [0023] 引腳：20 [0024] 輸入段：22 [0025] 接觸段：24 [0026] 連接段：26 [0027] 發光晶片：30 [0028] 金線：32 [0029] 封裝體：40 [0030] 第一區域：42 [0031] 第二區域：44 [0032] 光調節結構：5 0 099137387 表單編號A0101 第8頁/共15頁 0992065182-0 60 201220551 [0033] 通孔：52 [0034] 第一螢光粉 62 [0035] 第二螢光粉 〇 099137387 表單編號A0101 第9頁/共15頁 0992065182-0It is a matter of course that the light-emitting diode is not limited to the above-disclosed structure, and it can be changed accordingly according to actual needs. For example, the light-adjusting structure 50 may be circular to cover the first-region material and expose the second region 44, or only the first region 42 and the first region may be doped with phosphor powder. The effect of changing the color of the light-emitting diode can be achieved. [_] Since the light-adjusting structure 5G is energized to change the light-emitting color of the light-emitting diode, the control is simple and can be adapted to industrial large-scale applications. Further, depending on the magnitude of the applied current, the color of the light-adjusting structure 5 可 can exhibit a gradual state, and thus it is more advantageous to mix and diversify the emitted light. _In summary, the invention conforms to the patent requirements of the invention, and the patent application is filed according to law. However, the above description is only the preferred embodiment of the present invention, and the equivalent modification or the modification of the present invention is made by those skilled in the art of the present invention in the form of 099137387 Form No. A0101 Page 7 of 15 0992065182-0 201220551 Changes are to be covered by the following patent applications. BRIEF DESCRIPTION OF THE DRAWINGS [0018] Fig. 1 is a cross-sectional view showing a light-emitting diode of the present invention, in which a light-regulating structure of a light-emitting diode is in an unenergized state. [0019] FIG. 2 is similar to FIG. 1 in that the light adjustment structure is in an energized state. 3 is a top plan view of the light emitting diode of FIG. 1. [0021] FIG. 4 shows a spectral curve of the light-emitting diode of FIG. 1 in two different states. [Main component symbol description] [0022] Base: 10 [0023] Pin: 20 [0024] Input section: 22 [0025] Contact section: 24 [0026] Connection section: 26 [0027] Luminous chip: 30 [0028] ] Gold wire: 32 [0029] Package: 40 [0030] First area: 42 [0031] Second area: 44 [0032] Light adjustment structure: 5 0 099137387 Form number A0101 Page 8 / Total 15 page 0992065182- 0 60 201220551 [0033] Through hole: 52 [0034] First phosphor powder 62 [0035] Second phosphor powder 〇 099137387 Form number A0101 Page 9 / Total 15 page 0992065182-0