1337334 九、發明説明： 【發明所屬之技術領域】 本發明係涉^一種發光模組，特別係指一種自動調敕 發光功率之發光模組及其自動調整發光功率方法。 a 【先前技術】 發光二極體在近幾年來已逐漸受到重視，尤其是以高 亮度發光二極體（High-brightness Light Emitting1337334 IX. Description of the Invention: [Technical Field] The present invention relates to a lighting module, and more particularly to a lighting module that automatically adjusts the luminous power and a method for automatically adjusting the luminous power. a [Prior Art] Luminescent diodes have received increasing attention in recent years, especially in high-brightness light Emitting (High-brightness Light Emitting)
Diodes，HB LED)，需求量更是大幅提昇，在業界中已掀起 一股狂潮。而相較於傳統的白熱燈泡，高亮度發光二極體 更具備了省電、使用壽命長、耐久性高及反應速度快等優 點。目前高焭度發光二極體的熱門應用除了在一般照明、 商品照明、汽車照明、戶外廣告看板及交通資訊顯示外， 更因消費性電子產品的進步發展，使得在各類型LCD背光 模組、行動電話或數位相機閃光燈模組上成為極力整合的 項目。 當使用發光二極體時，由於大部分的電流都被轉換成 熱能，只有較少部分的電流被轉化成光，所以在發光二極 體的電流設計上必須更為謹慎，而其中又以高亮度發光二 極體所消耗之電流為最。然而發光二極體在操作模式下有 其溫度限定的額定值，若在散熱不充分且長時間在高溫狀 態下使用，將使發光二極體加速老化使得發光效能降低並 且哥命也會大為縮短，因此如何將影響發光二極體的高溫 導出是一個值得探討的問題。 而習知技術中’利用發光二極體作為光源的發光模組 為了達到散熱的效果，多數是在設計上，事先預估總散熱 6 1337334 提供一種發光模組之自動調整發光功率方法，其步驟包 括：首先接收一第一電源，並依據所處環境溫度而產生一 溫度量測值；進而根據該溫度量測值以將該第一電源轉換 輸出為一第二電源，最後經由該第二電源以調整該發光模 組發光功率的高低。 以上所述之溫度感測單元可例如為一負溫度係數 (Negative Temperature Coefficient，NTC)之熱敏電阻 (Thermistor)，利用其對溫度的敏感度特性來偵測溫度， 以及溫度越高而電阻值越小的性質，使其隨著溫度變化而 產生不同之電阻值。 以上之概述與接下來的詳細說明及附圖，皆是為了能 進一步說明本發明為達成預定目的所採取之方式、手段及 功效。而有關本發明的其他目的及優點，將在後續的說明 及圖式中加以闡述。 【實施方式】 請參考第一圖及第二圖，係本發明自動調整發光功率 之發光模組之示意圖及立體分解圖，如圖所示發光模組主 要係由發光二極體模組1、電源控制板2及外套管3所組 成’其中發光二極體模組1係由外套管3包覆，並且再與 電源控制板2產生電性連接。在發光二極體模組1中，包 έ至少一發光二極體晶粒12著晶（Die Attach)在金屬基板 11上；而在電源控制板2上包含有一溫度感測單元22，以 在電源控制板2與發光二極體模組1結合之同時，藉由實 體靠抵在金屬基板11上，來偵測發光二極體晶粒12所處 環境之溫度’並且隨時產生不同的溫度量測值，以自動調 整發光模組之發光功率。 8 丄337334 請參考第三圖，係本發明自動調整發光功率之發光模 組之較佳實_方塊圖’由圖可知，本發明提供—種自動 調整發光功率之發光模組，其包括：—發光二極體模組卜 —電源控制板2及一外套管3。 其中，發光二極體模組1更包含有一金屬基板u及至 ;一發光二極體晶粒12’並且發光二極體模組丨係包覆於 外套管3之中。該些發光二極體晶粒12係著晶於該金屬基 板11上’並且金屬鐘11彳為銅基板或銘基板等金屬材 質，而外套管3之外觀係可為銅或鋁等金屬材質。 、此外，電源控制板2係電性連接發光二極體模組j， 並更進一步包含有一電源轉換單元21及一溫度感測單元 22’其中溫度感測單元22除了係電性連接該電源轉換單元 21外，更可直接以實體靠抵該發光二極體模組1中的金屬 基板11，以隨時偵測著晶在金屬基板11上的發光二極體 晶粒12所產生之熱能或者因外在氣溫變化所致的常態溫 度，而轉換溫度感測單元22本身所產生的溫度量測值。另 外，電源轉換單元21係用以接收一第一電源211，並因溫 度感測單元22所產生不同的溫度量測值，而轉換輸出不同 的第二電源212來調整功率。因此可藉由溫度的感測而自 動調整發光模組的發光功率之高低’而使發光模組在溫度 過高時可進行降溫，且在溫度較低時則可相對提高發光功 率。以上所述的溫度感測單元22可例如為熱敏電阻 (Thermistor)、熱二極體（Thermal Diode)或熱電偶 (Thermal Couple)等’其中熱敏電阻係為負溫度係數 (Negative Temperature Coefficient，NTC)之熱敏電阻’ 並且其包裝可為表面黏著式（SMT)或插件式（DIP)等包裝方 9 1337334 式。 請參考第四圖’係本發明自動調整發光功率之發光模 組之較佳實施例流程圖，首先進行接收一第一電源 21KS401);並依據該些發光二極體晶粒12所處環境之溫 度’來產生一溫度量測值（S403)，其中係透過一溫度感測 單元22藉由實體靠抵在發光二極體模組1中的金屬基板 11 ’以實際偵測所處環境溫度，而產生該溫度量測值；並 且該度感測早元22係可例如為負溫度係數（Negat i veDiodes, HB LED), the demand is greatly increased, and there has been a wave of frenzy in the industry. Compared with the traditional white heat bulb, the high-intensity light-emitting diode has the advantages of power saving, long service life, high durability and fast response speed. At present, in addition to general lighting, commodity lighting, automotive lighting, outdoor advertising billboards and traffic information display, the popular applications of high-intensity LEDs are also due to the advancement of consumer electronics products, resulting in various types of LCD backlight modules, The mobile phone or digital camera flash module has become a highly integrated project. When using a light-emitting diode, since most of the current is converted into heat, and only a small part of the current is converted into light, the current design of the light-emitting diode must be more cautious, and among them high The current consumed by the luminance LED is the highest. However, the light-emitting diode has a temperature-limited rating in the operating mode. If the heat is insufficient and used for a long time in a high temperature state, the LED will be accelerated and aged, so that the luminous efficiency is lowered and the life is large. In order to shorten, how to influence the high temperature of the light-emitting diode is a problem worth exploring. In the prior art, in order to achieve the heat dissipation effect of the light-emitting module using the light-emitting diode as the light source, most of the design is to estimate the total heat dissipation 6 1337334 in advance to provide a method for automatically adjusting the light-emitting power of the light-emitting module. The method includes: first receiving a first power source, and generating a temperature measurement value according to the ambient temperature; and further converting the first power source into a second power source according to the temperature measurement value, and finally passing the second power source In order to adjust the level of the light-emitting power of the light-emitting module. The temperature sensing unit described above may be, for example, a negative temperature coefficient (NTC) thermistor, using its sensitivity to temperature to detect temperature, and the higher the temperature, the resistance value. The smaller the property, the different resistance values are produced as the temperature changes. The above summary, the following detailed description and the annexed drawings are intended to further illustrate the manner, the Other objects and advantages of the present invention will be described in the following description and drawings. [Embodiment] Please refer to the first figure and the second figure, which are schematic diagrams and perspective exploded views of the illumination module for automatically adjusting the illumination power of the present invention. The illumination module is mainly composed of the LED module. The power control board 2 and the outer sleeve 3 are formed. The light-emitting diode module 1 is covered by the outer sleeve 3 and electrically connected to the power control board 2. In the LED module 1, at least one LED die 12 is die-bonded on the metal substrate 11; and the power control panel 2 includes a temperature sensing unit 22 to The power control board 2 is combined with the LED module 1 to detect the temperature of the environment in which the LED die 12 is located by physically contacting the metal substrate 11 and generating different temperature amounts at any time. The measured value is used to automatically adjust the luminous power of the light-emitting module. 8 丄 337334 Please refer to the third figure, which is a preferred embodiment of the illuminating module for automatically adjusting the illuminating power of the present invention. As can be seen from the figure, the present invention provides a illuminating module for automatically adjusting the illuminating power, which comprises: The light emitting diode module is a power control board 2 and an outer sleeve 3. The LED module 1 further includes a metal substrate u and a light-emitting diode die 12' and the light-emitting diode module is wrapped in the outer sleeve 3. The light-emitting diode crystal grains 12 are crystallized on the metal substrate 11 and the metal clock 11 is made of a metal material such as a copper substrate or a mother substrate, and the outer sleeve 3 may be made of a metal such as copper or aluminum. In addition, the power control board 2 is electrically connected to the LED module j, and further includes a power conversion unit 21 and a temperature sensing unit 22'. wherein the temperature sensing unit 22 is electrically connected to the power conversion unit. In addition to the unit 21, the metal substrate 11 in the LED module 1 can be directly physically connected to detect the thermal energy generated by the LED diode 12 on the metal substrate 11 or the cause. The normal temperature caused by the external temperature change is converted to the temperature measurement value generated by the temperature sensing unit 22 itself. In addition, the power conversion unit 21 is configured to receive a first power source 211 and switch the output of the different second power source 212 to adjust the power due to the different temperature measurement values generated by the temperature sensing unit 22. Therefore, the height of the light-emitting power of the light-emitting module can be automatically adjusted by sensing the temperature, so that the light-emitting module can be cooled when the temperature is too high, and the light-emitting power can be relatively increased when the temperature is low. The temperature sensing unit 22 described above may be, for example, a thermistor, a thermal diode, or a thermocouple, etc., wherein the thermistor is a negative temperature coefficient (Negative Temperature Coefficient, NTC) Thermistors' and their packaging can be surface mount type (SMT) or plug-in type (DIP) package type 9 1337334. Please refer to the fourth figure, which is a flow chart of a preferred embodiment of the light-emitting module for automatically adjusting the light-emitting power of the present invention, first receiving a first power source 21KS401); and according to the environment of the light-emitting diodes 12 The temperature is used to generate a temperature measurement value (S403), wherein the temperature sensing unit 22 is physically connected to the metal substrate 11' in the LED module 1 to actually detect the ambient temperature. And generating the temperature measurement value; and the degree sensing early element 22 can be, for example, a negative temperature coefficient (Negat i ve
Temperature Coefficient，NTC)之熱敏電阻、熱二極體 (Thermal Diode)或熱電偶（Thermal Couple)等，而熱敏電 阻的包裝方式可為表面黏著式（SMT)或插件式（DIp)等；另 外，該環境溫度係隨時受發光二極體晶粒12產生之溫度或 者外在常態溫度變化所影響。 之後再透過一電源轉換單元21根據該溫度量測值，以 將該第一電源211轉換輸出為一第二電源212(S4〇5；)。最 後藉由輸出第二電源212的不同以達成自動調整該發光模 組之發光功率（S409)的作用。 " 、 凊參考第五圖，係本發明内容之電源控制板之一的實 ，例電路II ’如圖所示’降壓轉換電路5〇係由—降壓轉換 為U1及其週邊線路所組成’並搭配_負溫度係數之熱敏電 阻51以將—輸入電壓501轉換輸出為一壓降電壓5〇2。其 中，降壓職11 U1錢過分壓原縣罐所轉換輪出的壓 ’而負溫度係數之熱敏電阻51係用以偵測目前 所處衣兄之溫度而自動改變本身的電阻值，以產生不同之 反饋電壓503 ’來調整降壓轉換器U1所轉換輸出的壓降電 廢502 °因此’藉由壓降電壓502的改變，而得以自動調 10 整發光二極體晶粒12的發光功率。 而負溫度係數之熱敏電阻51的選擇，必須使降歷轉換 器U1所轉換輸出的壓降電壓5〇2係在可驅動發光二極體晶 粒12下’也能使發光二極體晶粒12的工作溫度保持在額 定的工作限度内，即使負溫度係數之熱敏電阻51所偵測到 的溫度高至上限值，則進行反饋一最低電壓，以降低該壓 降電壓502的輸出’進而將發光二極體晶粒12的發光功率 降至最低以進行降溫。相反的，若負溫度係數之熱敏電阻 51所偵測到的環境溫度較低，則會產生較大的電阻值’以 2換輸出較大的壓降電壓5〇2，而使得發光二極體晶粒12 產生較大的發光功率。 综上所述，藉由上述之技術手段，本發明藉由溫度感 夯單元22對溫度的敏感度特性來自動調整發光模組的發 、功率，不僅達到在溫度較高時進行降低發光功率來降溫 功呆遵發光一極體晶粒，並且在溫度較低時相對提高發光 工率之目的，更包括下列幾項優點： 1、 縮小體積：透過電路設計的方式來主動降低發光 功率，不但可以主動調整發光功率來調節溫度， 更不用再搭配體積龐大的散熱介質進行降溫，而 可縮小整個發光模組的體積。 2、 增加夜間照明度：由於常態溫度也是影響溫度感 應單元22偵測環境溫度時之一環’因此當夜間溫 度較低時，電源轉換單元21反而能提供較大的電 源’以相對提高整個發光模組的發光功率，增加 夜間的照明度。 惟’以上所述，僅為本發明之實施例而已，並非用以 限制本發明，任何 ^ 之領域内，可 所界定之專利 輕易思及之變化^: “項技藝者在本發明 範圍。 — >飾皆可涵蓋在以下本案 【圖式簡單說明】 第一圖係本發明自 弟一圖係本發明自 圖； 動調整發光功率之發光模組之示意圖； 為謂整發光功率之發光模組之立體分解 第二圖係本發明自動輕發光功率之發光模組之較佳實施 例方塊圖； 第四圖係本發明自動輕發光功率之發光模組之較佳實施 例流程圖；及 第五圖係本發明内容之電源控制板之一的實施例電路圖。 【主要元件符號說明】 發光二極體模組1 金屬基板11 發光二極體晶粒12 電源控制板2 電源轉換單元21 第一電源211 第二電源212 溫度感測單元22 外套管3 降壓轉換電路50 12 1337334 負溫度係數之熱敏電阻51 降壓轉換器U1 輸入電壓501 壓降電壓502 反饋電壓503Temperature Coefficient, NTC) Thermistor, Thermal Diode or Thermal Couple, etc., and the thermistor can be packaged as surface mount (SMT) or plug-in (DIp); In addition, the ambient temperature is affected by the temperature generated by the light-emitting diode die 12 or the external normal temperature change. Then, the first power source 211 is converted and outputted to a second power source 212 (S4〇5;) according to the temperature measurement value through a power conversion unit 21. Finally, the effect of automatically adjusting the light-emission power of the light-emitting module (S409) is achieved by outputting the difference of the second power source 212. " , 凊 Refer to the fifth figure, which is one of the power control boards of the present invention, and the circuit II' is shown in the figure as the 'buck conversion circuit 5' is converted from the buck to the U1 and its peripheral lines. The thermistor 51 is formed to be combined with the negative temperature coefficient to convert the input voltage 501 into a voltage drop voltage of 5〇2. Among them, the pressure-reducing 11 U1 money over-presses the pressure of the original cans, and the negative temperature coefficient thermistor 51 is used to detect the temperature of the current brother and automatically change its resistance value, A different feedback voltage 503 ' is generated to adjust the voltage drop of the output of the buck converter U1 to be 502 °. Therefore, by the change of the voltage drop voltage 502, the illumination of the entire LED die 12 is automatically adjusted. power. The selection of the negative temperature coefficient thermistor 51 must be such that the voltage drop voltage 5〇2 outputted by the gradual converter U1 is driven under the illuminating diode die 12 to enable the illuminating diode crystal. The operating temperature of the pellet 12 is maintained within the rated operating limit. Even if the temperature detected by the negative temperature coefficient thermistor 51 is as high as the upper limit value, a minimum voltage is fed back to reduce the output of the voltage drop voltage 502. Further, the light-emitting power of the light-emitting diode die 12 is minimized to perform temperature drop. Conversely, if the ambient temperature detected by the negative temperature coefficient thermistor 51 is low, a large resistance value is generated, and a large voltage drop voltage of 5 〇 2 is outputted by 2, so that the light emitting diode is made. The bulk crystal grains 12 generate a large luminous power. In summary, according to the above technical means, the present invention automatically adjusts the power and power of the light-emitting module by the temperature sensitivity characteristic of the temperature sensing unit 22, not only to reduce the luminous power when the temperature is high. The cooling function stays in accordance with the illuminating one-pole crystal grain, and relatively increases the luminous efficiency at a lower temperature, and further includes the following advantages: 1. Reduce the volume: actively reduce the luminous power through the circuit design method, not only can Actively adjust the luminous power to adjust the temperature, not to reduce the temperature with the bulky heat dissipation medium, and reduce the volume of the entire lighting module. 2. Increasing the night illumination: Since the normal temperature also affects one of the rings when the temperature sensing unit 22 detects the ambient temperature, the power conversion unit 21 can provide a larger power supply when the night temperature is lower to relatively increase the entire illumination mode. The luminous power of the group increases the illumination at night. However, the above description is only for the embodiments of the present invention, and is not intended to limit the present invention. In the field of any ^, the patents that can be defined are easily changed. ^: "The skilled artisan is within the scope of the present invention. > Decorations can be covered in the following case [simplified description of the drawings] The first picture is a self-image of the present invention. The schematic diagram of the light-emitting module for adjusting the luminous power; The second embodiment of the present invention is a block diagram of a preferred embodiment of the light-emitting module of the automatic light-emitting power of the present invention; and the fourth embodiment is a flow chart of a preferred embodiment of the light-emitting module of the automatic light-emitting power of the present invention; Figure 5 is a circuit diagram of an embodiment of a power control panel of the present invention. [Description of main components] LED module 1 Metal substrate 11 LED die 12 Power control board 2 Power conversion unit 21 First Power supply 211 Second power supply 212 Temperature sensing unit 22 Outer casing 3 Buck converter circuit 50 12 1337334 Negative temperature coefficient thermistor 51 Buck converter U1 Input voltage 501 Voltage drop voltage 502 Feedback 503