200941018 九、發明說明： 【發明所屬之技術領域】 本發明為一種發光二極體的警示系統與方法，特別是 一種具有發光二極體有效壽命偵測的發光二極體的警示系 統與方法。 【先前技術】 藝發光二極體（Light Emitting Diode，LED)，由於具有 高耐震性（shock resistance)、壽命長，同時耗電量少、 發熱度小，所以其應用範圍遍及曰常生活中的各項用品， 如家電製品及各式儀器之指示燈或光源等。近年來，隨著 白光型發光二極體（White Light-Emitting Diode，WLED) 的出現，使LED擺脫過去只能用在指示燈號、霓虹燈飾等 場合，開始往電子照明領域邁進，包括汽車的方向辅助燈、 數位相機的閃光燈等，未來更可取代白熾燈和螢光燈，做 ❾為主要的家庭照明。 一般傳統的LED是透過一 P/N介面（junction)來發 光’若P/N介面上發生缺陷，則容易造成電流集中而燒毀 LED。但是，LED在使用一段時間後，亮度會逐漸降低， 因此須要加大電流驅動，使得LED的發光亮度可以維持一 定’但是這又增加燒毁LED的機率。此外，目前LED僅 能在損壞時進行替換，不能預先得知LED的損壞程度，用 以做為預先替換的考量，對使用者來說，是不方便且增加 危險性。舉例來說，車輛所有安全性的元件，如油量與水 5 200941018 ♦ , 溫與安全氣囊，在儀表板上幾乎都有指示燈，雖然車燈也 有開路警示燈號，不過都是於光源完全失效時才會顯示， 也就是使用者可能會經歷需光源卻無光源的時段。若是發 生在號諸燈與鐵路信號燈上，其危險性就更高了，現有led 與傳統光源中’尤其是LED由於半導體材料特性，光輸出 • 都是於使用過程中逐漸下降，且根據使用溫度不同與環境 狀態’每一顆LED真正的壽命與出光狀態都為無法準確預 估’一般完全失效都發生在使用中，用於一般照a月雖然有 β 些不便’尚可接受，若用於安全或信號的光源就有極大的 危險性，如車燈與號誌燈與鐵路信號燈。 【發明内容】 本發明的可提供一種具有發光二極體有效壽命偵測的 發光二極體的警示系統與方法。 本發明亦可提供一種LED光源有效壽命檢出之系統， 也就是說在LED光源亮度未下降與完全失效前，提供預警 ❹指示燈或晶粒有效百分比信號之顯示功能。 本發明亦可提供一種發光二極體的警示系統，包括一 發光單元、一偵測裝置以及一警示裝置。該發光單元，由 複數個微晶粒組成。該偵測裝置，用以偵測該發光單元， 並輸出一偵測結果。該警示裝置，根據該偵測結果顯示該 發光單元中的微晶粒的損害狀態。 【實施方式】 第1圖為LED微晶粒的結構示意圖。第1圖中所示的 6 200941018 • LED晶片可為交流LED或是高壓直流LED。在LED晶片 上，將LED先分割成數十個微晶粒，再電性連接而成，因 此在晶片缺陷特徵上也被完全分割成數十個區塊，不會有 並聯連鎖效應。當LED晶片上有一微晶粒失效時，並不會 讓整個LED完全不發光，因此單一微晶粒失效影響程度會 以總微晶粒數為分母來計算。因此微晶粒數分割越多，單 一微晶粒失效影響度會越低，以30微晶粒數組成的交流 led而例，單一微晶粒失效影響度僅2 7%且影響的範圍又 ® 極可能僅限在交流電之某一半波。 若以較高電壓的方式設計，交流LED或高壓LED微 晶粒可能100顆以上，其每一個微晶粒失效影響度就會降 至。根據交流LED失效特性分析推估，若以目前實驗 資料及失效標準30%而論，1〇〇顆微晶粒的交流LED，等 於須有30顆微晶粒失效才達失效條件，此時光源輸出尚高 於初始亮度，只是效率較差而已，LED壽命可擺脫缺陷效 應而充分延長。 _ 第2A圖為一交流LED中失效的微晶粒數與交流led 的電壓-電流-功率（（V-I-W))示意圖。在第2圖中，係以 一 〇.〇6mm2 36/54pcs的交流LED為例說明。曲線21表示 固定交流電壓，曲線22為交流LED所接收到的電流， 曲線23為交流LED所消耗的功率。由第2A圖至第2F圖 可以發現’失效的微晶粒數目越多，交流LED所接收到的 電流越高，這也使得交流LED所發出的光的亮度也跟著增 加。雖然交流LED的發光效率會變得較差，但是確能^ 7 200941018 • LED壽命有效的延長。這樣的特徵也出現在以微晶粒組成 的高壓直流LED上。 第3圖表示在定電壓的驅動下，交流LED微晶粒失效 特性變動率圖。在第3圖中，係以〇.〇6mm2 36/54pcs的交 流LED為例說明。曲線31表示習知的LED失效示意曲線。 . 由於一般LED的PN接面只要有發生缺陷，在定電壓系統 ‘ 的驅動下，光通量與等效内阻會急速下降，電流會瞬間升 高燒毀LED形成開路。曲線32表示交流LED中不同數量 ❿ 的微晶粒失效時的輸入功率變化百分比。曲線33表示交流 LED中不同數量的微晶粒失效時的交流LED的光通量變 化百分比。曲線34表示交流LED中不同數量的微晶粒失 效時的交流LED的發光效率變化百分比。由圖上可知，微 晶粒失效數量越南，交流LED所發出的光通量越多。當交 流LED中的微晶粒失效數置為8顆時’輸入的功率增加了 159%，交流LED輸出的光通量增加了 53%，發光效率則 下降了 41.5%。交流LED或高壓直流LED在定電壓驅動 ❹下’在部分微晶粒失效短路時’會有一段光通量上升區間， 這種現象起因於輸入功率與電流上升’且與微晶粒失效數 成正比關係。此時交流LED的失效只會降低自身的發光效 率，並不會像習知的LED因等效内阻急迷下降而燒毀。若 交流LED上有部分微晶粒為開路，亦有可能保持半波點量 (亦即在父流電壓的正電壓或負電壓區間時，交流led仍 會發光）。 因為本發明所提的交流LED或高壓直流LED在部分 8 200941018 微晶粒失效時，輸出的光通量會遞增，因此，若要維持交 流LED或高壓直流LED輸出的光通量固定，則必需在交 流LED或高壓直流LED輸出的光通量增加時，降低輸入 交流LED或高壓直流LED的電壓或電流。與習知必須提 高驅動電壓或驅動電流來維持發光元件的亮度的特徵剛好 相反。 第4圖為根據本發明之發光二極體的顯示系統的一實 施例的方塊圖。LED單元43由交流LED或高壓直流LED © 所組成’其中交流LED或高壓直流LED皆由如第1圖所 示之複數個微晶粒所組成。電壓源41透過可變電阻42與 LED單元43耦接。光偵測器44用以偵測LED單元43所 輸出的光通量變化，或是LED發光單元43亮度變化。光 偵測器44根據該LED發光單元43增加的亮度來調整可變 電阻42的電阻值，使得輸入LED發光單元43的電流減 少’以維持LED發光單元43輸出固定的光通量。這樣以 來也可以延長LED發光單元43的使用壽命。在本實施例 Φ中，LED發光單元43可能為單一交流LED或高壓直流 LED，或是由複數個交流lED或高壓直流組成的模 組，如汽車的車燈或是交通號誌燈具。 第5圖為根據本發明之發光二極體的顯示系統的另一 實施例的方塊圖。LED單元53由交流LED或高壓直流LED 所組成，其中交流LED或高壓直流LED皆由如第1圖所 示之複數個微晶粒所組成。光偵測器54用以偵測led單 兀53所輪出的光通量’並將偵測到的結果傳送給控制器 200941018 • 51。控制器51根據LED發光單元53增加的亮度，控制電 流源52來減少輸入該LED發光單元53的驅動電流。在本 實施例中，若LED單元53由高壓直流LED所組成，則用 以驅動LED單元53的驅動電流可以為一脈衝寬度調變信 號，由一脈衝寬度調變電路產生。並可藉由調整該脈衝寬 度調變信號的責任周期，來控制LED發光單元53的亮度。 第6圖為根據本發明之具有警示裝置的發光二極體的 警示系統的一實施例的方塊圖。LED單元61由電壓源62 ©驅動。LED單元61由如第i圖所示之複數個微晶粒的高 壓直流LED所組成。偵測裝置63用以偵測LED單元 所輸出的光通量變化或亮度變化，並將偵測到的結果傳送 給電壓源62,用以調整電壓源62輸出到LED單元61的 驅動電壓，使得LED單元43所輸出的光通量維持一定。 在另一實施例中，偵測裝置63將偵測到的結果傳送給警示 裝置64，警示裝置64並根據偵測到的結果判斷lED單元 _ 61中失效的微晶粒數。若失效的微晶粒數超出一預定值 時，此時LED單元61仍可正常運作，但是警示裝置64輸 出警示信號，如閃爍的燈號，警告音或是味道，提醒使用 者進行更換。 警示裝置64與調整電壓源62的輪出電壓可同時運 作，亦即可同時知道LED單元61中失效的微晶粒數，亦 可調整電壓源62的輸出電壓使得LED單元43所輸出的光 ，量維持一定。在一實施例中，可先藉由警示裝置64記錄 a目刚LED單元61中失效的微晶粒數後，再調整電壓源 200941018 . 62的輸出電壓。 在另一實施例中，偵測裝置63偵測LED單元61所輸 出的光通量變化，或是LED發光單元61亮度變化，並將 债測到的結果轉換為LED發光單元61中微晶粒的失效 數。若LED發光單元61中微晶粒的失效數大於一預定值’ 或是失效的微晶粒數佔全部微晶粒數的百分比大於一定預 定百分比時’偵測裝置63輸出控制信號，使警示裝置64 輸出警示信號，如閃爍的燈號，警告音或是味道，提醒使 ❹用者進行更換。 在另一實施例中，電壓源62為定電壓源，因此不須根 據偵測裝置63的偵測結果調整輸出電壓。偵測裝置63可 能為電壓變化檢測電路、電流變化檢測電路或功率變化檢 測電路’並將偵測到的結果傳送給警示裝置64。若led 發光單元61中微晶粒的失效數大於一預定值，或是失效的 微晶粒數佔全部微晶粒數的百分比大於一定預定百分比 時’警示裝置64輸出警示信號，如閃爍的燈號，警告音或 ❹疋味道，提醒使用者進行更換。 第7圖為根據本發明之具有警示裝置的發光二極體的 警示系統的另一實施例的方塊圖。LED單元71由電壓源 72驅動。LED單元71可由交流LED或高壓直流LED所 組成，其中交流LED或高壓直流LED皆由如第1圖所示 之複數個微晶粒所組成。在本實施例中，偵測裝置為一功 率變化檢出裝置73，用以判斷LED單元71的功率變化。 在本實施例中，LED單元71為高壓直流LED，且特性以 200941018 第3圖所示之特性曲線為例說明，且雷厭 屯！嫁72為定雷懕200941018 IX. Description of the Invention: [Technical Field] The present invention is a warning system and method for a light-emitting diode, and more particularly, a warning system and method for a light-emitting diode having an effective lifetime detection of a light-emitting diode. [Prior Art] Light Emitting Diode (LED) has a wide range of shock resistance, long life, low power consumption and low heat generation, so its application range is common in everyday life. Various items, such as household appliances and indicators or light sources of various instruments. In recent years, with the advent of the White Light-Emitting Diode (WLED), the LED has been used in the past, and can only be used in the field of indicator lights, neon lighting, etc., and has begun to move into the field of electronic lighting, including automobiles. Directional auxiliary lights, digital camera flashes, etc., can replace incandescent and fluorescent lights in the future, making it the main home lighting. Generally, conventional LEDs emit light through a P/N interface. If a defect occurs on the P/N interface, current is easily concentrated and the LED is burned. However, after a period of use of the LED, the brightness will gradually decrease, so it is necessary to increase the current drive so that the brightness of the LED can be maintained at a certain value 'however, this increases the probability of burning the LED. In addition, LEDs can only be replaced in the event of damage, and the degree of damage of the LEDs cannot be known in advance, and as a pre-replacement consideration, it is inconvenient and dangerous for the user. For example, all safety components of the vehicle, such as oil quantity and water 5 200941018 ♦ , temperature and airbags, almost all indicators on the dashboard, although the lights also have open warning lights, but all in the light source It will be displayed when it is invalid, that is, the user may experience a period of time when there is a light source but no light source. If it occurs on the number of lights and railway signal lights, the danger is even higher. In existing LEDs and traditional light sources, especially LEDs due to the characteristics of semiconductor materials, light output is gradually reduced during use, and according to the use temperature Different and environmental conditions 'The true life and light output status of each LED is not accurate. 'Generally, all failures occur in use. For general photos, although there are some inconveniences in a month, it is acceptable, if used Safety or signal sources are extremely dangerous, such as lights and lights and railway lights. SUMMARY OF THE INVENTION The present invention can provide a warning system and method for a light-emitting diode having an effective lifetime detection of a light-emitting diode. The invention can also provide a system for detecting the effective life of an LED light source, that is, providing a display function of an early warning ❹ indicator light or a die effective percentage signal before the brightness of the LED light source is lowered or completely failed. The invention can also provide a warning system for a light-emitting diode, comprising a light-emitting unit, a detecting device and a warning device. The light emitting unit is composed of a plurality of microcrystal grains. The detecting device is configured to detect the lighting unit and output a detection result. The warning device displays a damage state of the microcrystal grains in the light emitting unit according to the detection result. [Embodiment] FIG. 1 is a schematic view showing the structure of an LED microcrystal. 6 200941018 shown in Figure 1 • The LED chip can be an AC LED or a high voltage DC LED. On the LED chip, the LED is first divided into dozens of micro-grains and then electrically connected. Therefore, the defect characteristics of the wafer are also completely divided into dozens of blocks, and there is no parallel interlocking effect. When there is a micro-grain failure on the LED wafer, the entire LED will not be completely illuminated, so the degree of single micro-grain failure will be calculated by taking the total micro-grain number as the denominator. Therefore, the more the micro-grain number is divided, the lower the influence of single micro-grain failure. For example, the alternating-lead consisting of 30 micro-grain numbers has a single micro-grain failure effect of only 2 7% and the range of influence is It is most likely to be limited to a certain half of the alternating current. If designed at a higher voltage, the AC LED or high-voltage LED micro-grain may be more than 100, and the effect of each micro-grain failure will be reduced. According to the analysis of AC LED failure characteristics, if the current experimental data and the failure criterion are 30%, 1 微 micro-array AC LED is equal to 30 micro-crystal failures to reach the failure condition. The output is still higher than the initial brightness, but the efficiency is poor, and the LED life can be fully extended without the defect effect. _ Figure 2A is a schematic diagram of the number of failed micro-grains in an AC LED and the voltage-current-power ((V-I-W)) of the AC led. In Fig. 2, an AC LED of 〇.〇6mm2 36/54pcs is taken as an example. Curve 21 represents the fixed AC voltage, curve 22 is the current received by the AC LED, and curve 23 is the power consumed by the AC LED. From Fig. 2A to Fig. 2F, it can be found that the more the number of failed microcrystals, the higher the current received by the AC LED, which also causes the brightness of the light emitted by the AC LED to increase. Although the luminous efficiency of the AC LED will become poor, it can indeed be ^ 7 200941018 • The LED life is effectively extended. Such features also appear on high voltage DC LEDs composed of microcrystals. Figure 3 is a graph showing the rate of change of the failure characteristics of the AC LED micro-crystals driven by a constant voltage. In Fig. 3, an AC LED of 〇.〇6mm2 36/54pcs is taken as an example. Curve 31 represents a conventional LED failure profile. As long as there is a defect in the PN junction of the general LED, under the drive of the constant voltage system, the luminous flux and the equivalent internal resistance will drop rapidly, and the current will rise rapidly and burn the LED to form an open circuit. Curve 32 represents the percentage change in input power for different numbers of ❿ microcrystals in the AC LED. Curve 33 represents the percent change in luminous flux of the alternating current LED when a different number of microcrystals in the alternating current LED fails. Curve 34 represents the percentage change in luminous efficiency of the alternating current LED when a different number of microcrystals in the alternating current LED fails. As can be seen from the figure, the number of micro-grain failures in Vietnam, the more luminous flux emitted by the AC LED. When the number of micro-grain failures in the AC LED was set to 8, the input power increased by 159%, the luminous flux of the AC LED output increased by 53%, and the luminous efficiency decreased by 41.5%. AC LED or high-voltage DC LED will have a luminous flux rise interval when the voltage is driven by a constant voltage. This phenomenon is caused by the increase of input power and current' and is proportional to the number of micro-grain failures. . At this point, the failure of the AC LED will only reduce its own luminous efficiency, and will not burn like the conventional LED due to the decline of the equivalent internal resistance. If some of the micro-arrays on the AC LED are open, it is also possible to maintain a half-wave amount (that is, the AC LED will still emit light when the positive voltage or negative voltage range of the parent current voltage). Because the AC LED or the high-voltage DC LED proposed by the present invention fails in the partial 8 200941018 micro-grain failure, the luminous flux of the output increases, so if the luminous flux of the AC LED or the high-voltage DC LED output is to be fixed, it is necessary to be in the AC LED or When the luminous flux of the high-voltage DC LED output increases, the voltage or current of the input AC LED or the high-voltage DC LED is lowered. The opposite is true from the fact that it is necessary to increase the driving voltage or the driving current to maintain the luminance of the light-emitting element. Fig. 4 is a block diagram showing an embodiment of a display system of a light-emitting diode according to the present invention. The LED unit 43 is composed of an alternating current LED or a high voltage direct current LED © wherein the alternating current LED or the high voltage direct current LED is composed of a plurality of microcrystal grains as shown in Fig. 1. The voltage source 41 is coupled to the LED unit 43 via a variable resistor 42. The photodetector 44 is configured to detect a change in the luminous flux output by the LED unit 43 or a change in the brightness of the LED lighting unit 43. The photodetector 44 adjusts the resistance value of the variable resistor 42 in accordance with the increased brightness of the LED lighting unit 43, so that the current input to the LED lighting unit 43 is reduced to maintain the LED lighting unit 43 outputting a fixed luminous flux. This also extends the life of the LED lighting unit 43. In the embodiment Φ, the LED lighting unit 43 may be a single alternating current LED or a high voltage direct current LED, or a module composed of a plurality of alternating current lED or high voltage direct current, such as a car light or a traffic sign. Fig. 5 is a block diagram showing another embodiment of a display system of a light-emitting diode according to the present invention. The LED unit 53 is composed of an alternating current LED or a high voltage direct current LED, wherein the alternating current LED or the high voltage direct current LED is composed of a plurality of microcrystal grains as shown in Fig. 1. The photodetector 54 is configured to detect the luminous flux emitted by the led unit 53 and transmit the detected result to the controller 200941018 • 51. The controller 51 controls the current source 52 to reduce the drive current input to the LED lighting unit 53 in accordance with the increased brightness of the LED lighting unit 53. In the present embodiment, if the LED unit 53 is composed of a high voltage DC LED, the driving current for driving the LED unit 53 can be a pulse width modulation signal generated by a pulse width modulation circuit. The brightness of the LED lighting unit 53 can be controlled by adjusting the duty cycle of the pulse width modulation signal. Fig. 6 is a block diagram showing an embodiment of a warning system for a light-emitting diode having a warning device according to the present invention. The LED unit 61 is driven by a voltage source 62 © . The LED unit 61 is composed of a plurality of micro-grained high voltage DC LEDs as shown in Fig. i. The detecting device 63 is configured to detect a change in the luminous flux or brightness of the LED unit, and transmit the detected result to the voltage source 62 for adjusting the driving voltage of the voltage source 62 to the LED unit 61, so that the LED unit The luminous flux output from 43 is kept constant. In another embodiment, the detecting means 63 transmits the detected result to the alerting device 64, and the alerting device 64 determines the number of failed micro-grains in the lED unit_61 based on the detected result. If the number of failed micro-grains exceeds a predetermined value, the LED unit 61 can still operate normally, but the warning device 64 outputs a warning signal such as a flashing light, a warning sound or a taste to remind the user to replace it. The warning device 64 and the adjustment voltage source 62 can simultaneously operate, and the number of micro-grains that fail in the LED unit 61 can be known at the same time, and the output voltage of the voltage source 62 can be adjusted so that the light output by the LED unit 43 is The amount is maintained. In an embodiment, the output voltage of the voltage source 200941018.62 may be adjusted after the number of micro-grains in the LED unit 61 is recorded by the warning device 64. In another embodiment, the detecting device 63 detects the change of the luminous flux output by the LED unit 61 or the brightness change of the LED lighting unit 61, and converts the result of the debt measurement into the failure of the micro-crystals in the LED lighting unit 61. number. If the number of failures of the micro-grains in the LED lighting unit 61 is greater than a predetermined value' or the percentage of the number of failed micro-grains to the total number of micro-grains is greater than a predetermined percentage, the detecting device 63 outputs a control signal to cause the warning device 64 Output warning signals, such as flashing lights, warning tones or tastes, to remind the user to replace them. In another embodiment, the voltage source 62 is a constant voltage source, so the output voltage does not need to be adjusted based on the detection result of the detecting means 63. The detecting means 63 may be a voltage change detecting circuit, a current change detecting circuit or a power change detecting circuit 'and transmit the detected result to the alerting device 64. If the number of failures of the micro-grains in the LED lighting unit 61 is greater than a predetermined value, or the percentage of the failed micro-grains to the total number of micro-grains is greater than a predetermined percentage, the warning device 64 outputs an alarm signal, such as a flashing light. No., warning tone or scent, remind the user to replace. Fig. 7 is a block diagram showing another embodiment of the warning system of the light-emitting diode having the warning device according to the present invention. The LED unit 71 is driven by a voltage source 72. The LED unit 71 may be composed of an alternating current LED or a high voltage direct current LED, wherein the alternating current LED or the high voltage direct current LED is composed of a plurality of microcrystal grains as shown in Fig. 1. In the embodiment, the detecting device is a power change detecting device 73 for determining the power variation of the LED unit 71. In the present embodiment, the LED unit 71 is a high-voltage direct-current LED, and the characteristic is illustrated by the characteristic curve shown in FIG. 3 of 200941018, and it is ridiculous! Marry 72 for the Thunder
源。當微晶粒的失效數為4時，功率增加Ύ ew J 02 /〇，因為 LED 早元71 #蚊電壓的系統驅動，故可得知㈣ 62。/。。警示裝置74包括一限流電阻75魚 θ σί ，、4不單το 76。在 本實施例中’功率變化檢出裝置73可為—雷阳a _ 〇 „ _ , 、电丨且’顯不單元 e 0 76為具有OV啟動電壓的LED，功率變化檢出裝置乃盥 警示裝置74並聯。假設在沒有微晶粒燒毁的_下，κ LED單元71的電流為100mA，功率變化檢出裝置73 =電 阻值為12Ω，因此功率變化檢出裝置73產生的壓降為 1.2V，不足以使顯示單元76發光。當微晶粒的失效數為、4 時’流經LED單元7i的電流為162mA，此時功率變化檢 出裝置73產生的壓降為1.92V，便可使顯示單元％發光。 利用這樣的方式，便可藉由警示裝置74來得知led單元 71中，失效的微晶粒數。此外，亦可並聯或串聯複數= 示裝置，並藉由電路設計，使得不同的失效的微晶粒數二 以使不同的顯示裝置顯示，達到更佳的警示功能。 第8圖為根據本發明之具有警示裝置的發I二極體的 警示系統的另一實施例的方塊圖。led單元81由第一電 壓源82驅動。LED單元81可由交流LED或高壓直流led 所組成’其中交流LED或高壓直流LED皆由如第丨圖所 示之複數個微晶粒所組成。在本實施例中，偵測裝置為一 功率變化檢出裝置83，功率變化檢出裝置83包括一電阻 R1 ’光耦合器85以及限流電阻R2。光耦合器85包括led 85a以及一受光元件85b，其中當受光元件85b接收到光時 12 200941018 便會導通。電阻iu，JL右咕 ^ 、有一第一端與一第二端，立中該第 一端耦接該LED單元81， 听，、τ 該第一端麵接第一電壓源82。 限流電阻R2 ’具有一第—*山Ηϋ 始 、與一第二端，其中該第一端耦 接電阻R1的第一端。光;。/| . 尤耦合|§ 84，具有一第一端，耦接 該限流電阻R2的第二端，一 第一端，粞接該電阻R1的第 一端。該光輛合器輕接^ . 发詈不裝置84，當該光耦合器84 被致能時，使得該警示裝|8+_ 衣罝84中的警不發光二極體87停 止發光。警示裝置84包括一结source. When the number of failures of the micro-grains is 4, the power is increased by ew ew J 02 /〇, because the LED is driven by the system of the early-phase 71 # mosquito voltage, so it can be known (4) 62. /. . The warning device 74 includes a current limiting resistor 75 fish θ σί , and 4 not only το 76. In the present embodiment, the 'power change detecting device 73 can be - Leiyang a _ 〇 „ _ , , , and the display unit e 0 76 is an LED having an OV start voltage, and the power change detecting device is a warning The devices 74 are connected in parallel. It is assumed that the current of the κ LED unit 71 is 100 mA without the micro-grain burnout, and the power change detecting device 73 = the resistance value is 12 Ω, so the power drop detecting device 73 generates a voltage drop of 1.2. V, is insufficient to cause the display unit 76 to emit light. When the number of failures of the microcrystal grains is 4, the current flowing through the LED unit 7i is 162 mA, and the voltage drop generated by the power change detecting device 73 is 1.92 V. In this way, the number of failed micro-grains in the LED unit 71 can be known by the warning device 74. In addition, the plurality of devices can be connected in parallel or in series, and by circuit design, The number of different failed micro-grains is two to make different display devices display, and a better warning function is achieved. FIG. 8 is another embodiment of the warning system of the LED diode with the warning device according to the present invention. Block diagram. The led unit 81 is powered by the first The LED unit 81 can be composed of an alternating current LED or a high voltage direct current LED. The alternating current LED or the high voltage direct current LED is composed of a plurality of microcrystal grains as shown in the figure. In this embodiment, the detecting device As a power change detecting device 83, the power change detecting device 83 includes a resistor R1 'optical coupler 85 and a current limiting resistor R2. The optical coupler 85 includes a led 85a and a light receiving element 85b, wherein when the light receiving element 85b receives Light time 12 200941018 will be turned on. Resistance iu, JL right 咕 ^, has a first end and a second end, the first end is coupled to the LED unit 81, listen, τ the first end face A voltage source 82. The current limiting resistor R2' has a first -> and a second end, wherein the first end is coupled to the first end of the resistor R1. Light; ./|. Especially coupled|§ 84 The first end is coupled to the second end of the current limiting resistor R2, and the first end is connected to the first end of the resistor R1. The optical clutch is lightly connected to the device. When the optical coupler 84 is enabled, the warning light emitting diode 87 in the warning device |8+_ 罝 84 stops emitting light. The warning device 84 includes a knot
Ο 枯第二電壓源、電阻R3與R·4 ’ 以及警示發光二極體87。電阻R3,具有-第—端，耦接 該第二電壓源86。警示發光二極體87，具有—第一端， 雜接該電阻R3的-第二端，以及—第二端，透過電阻r4 接地，其中該警讀光二極體87的第二端_該受光元 件85b的第-端。藉由調整R3#R4的電阻值調整％的 電壓，使得警示發光二極體87可以發^在本實施例中， 光耦合器85中的LED 85a需要11V才會發光。 假设在沒有微晶粒燒毁的情形下，流經LED單元81 的電流為100mA，R1的電阻值為7 5Ω，因此R1產生的壓 降為0.75V ’不足以使LED 85a發光。當微晶粒的失效數 為4時’流經LED單元81的電流為162mA ’此時R1產 生的壓降為1.21V，便可使LED 85a發光，且受光元件85b 被導通。當受光元件85b導通時，電壓ye被拉至地電位， 吏知* i示發光一極體87無法發光，達到警示功能。此外， 更可利用一監控裝置（圖上未綠出），隨時監控電壓Vc， 备電壓Vc變為〇時，表示此時lED單元81中微晶粒的失 13 200941018 . 效數目為4。 第9圖為根據本發明之具有警示裝置的發光二極體的 警示系統的另一實施例的方塊圖。與第8圖相比’差異在 警示發光二極體87的位置，且警示發光二極體87 —開 始是不會發光，等到受光元件85b導通時’電壓Vc被拉 至地電位’警示發光二極體87才會發光。LED單元81由 第一電壓源82驅動。功率變化檢出裝置83包括一電阻 R1，光耦合器85以及限流電阻R2。光耦合器85包括LED ❹ 85a以及一受光元件85b，其中當受光元件85b接收到光時 便會導通。電阻IU，具有一第一端與一第二端，其中該第 一端耦接該LED單元81，該第二端耦接第一電壓源82。 限流電阻R2，具有一第一端與一第二端，其中該第一端耦 接電阻R1的第一端。光麵合器84，具有一第一端，輕接 該限流電阻R2的第二端，一第二端，耦接該電阻R1的第 二端。該光耦合器耦接該警示裝置84，當該光耦合器84 被致能時’使得該警示裝置84中的警示發光二極體87導 © 通。警示裝置84包括一第二電壓源86、電阻R3與R4， 以及警示發光二極體87。藉由調整R3與R4的電阻值調 整Vc的電壓，使得警示發光二極體87 一開始是不會發 光。在本實施例中’光耦合器85中的LED 85a需要1.1 V 才會發光。 假設在沒有微晶粒燒毀的情形下，流經LED單元81 的電流為100mA，R1的電阻值為7.5ω，因此R1產生的壓 降為0.75V，不足以使LED 85a發光。當微晶粒的失效數 200941018 =’流經LED單元81的電流為咖A，此時心 =壓降為⑽，便可使LED 85a發光，且受光元件㈣ 被導通。當受光元件85b導通時，電壓％被拉至地電位， 使得警示發光二極體87因㈣光，連到警示功能。此外， 更可利用-監控裝置（圖上未繪出），隨時監控電壓％， 當電壓Vc變為〇時，表示此時LED單元81中微晶粒的失 效數目為4。 第10圖為根據本發明之具有警示裝置的發光二極體 ❹的警示系統的另一實施例的方塊圖。LED單元1〇1由電壓 源102驅動。LED單元101可由交流LED或高壓直流LED 所組成’其中交流LED或高壓直流LED皆由如第丨圖所 示之複數個微晶粒所組成LED單元101耦接一偵測裝置， 在本實施例中，偵測裝置可為一功率變化檢出裝置，如圖 中的電阻R1。此外，偵測裝置還可包含一放大電路1〇3， 用以放大電壓VI，並將結果傳送給控制器104。在本實施 例中，可在放大電路103之前或之後耦接一類比數位轉換 ® 器（analog to digital converter )，用以將電壓 VI 轉換為一 數位信號。控制器104可藉由電壓VI的變化，透過LED 單元101中的LED的特性曲線，如第3圖所示’計算出目 前LED單元101中的LED微晶粒的失效數目。控制器104 再將結果透過顯示裝置105顯示。控制器1〇4可將LED單 元101中的LED微晶粒的失效數目以文字或圖形方式透過 顯不裝置105顯示。 第11圖為根據本發明之具有警示裝置的發光二極體 200941018 . 的警示系統的另一實施例的方塊圖。LED單元111由電壓 源112驅動。LED單元111可由交流LED或高壓直流LED 所組成，其中交流LED或高壓直流LED皆由如第1圖所 示之複數個微晶粒所組成。LED單元111耦接一偵測裝 置，在本實施例中，偵測裝置可為一功率變化檢出裝置， 如圖中的電阻R1。此外，偵測裝置還可包含一控制器113 和一編碼器114，控制器113監控電壓VI的變化，並透過 LED單元111中的LED的特性曲線，如第3圖所示，計算 ❿ 出目前LED單元111中的LED微晶粒的失效數目。接著， 控制器113將結果傳送到編碼器114進行編碼後，再傳送 到警示裝置117。編碼器114與警示裝置117之間的傳輸 可以透過線路、有線或無線網路、藍芽、紅外線等等的傳 輸方式來完成，而且對應的傳輸器（transmitter )與接收器 (receiver )亦是必要的。在本實施例中，警示裝置117為 遠端監控，用以監控LED單元111的使用情形。這可以應 用在交通號誌的監控上，在交通號誌燈號完全故障前進行 G 更換。解碼器115接收到編碼器114的資料並進行解碼， 將解碼後的結果傳送給監控單元116。監控單元116便可 得知此時LED單元111中的LED微晶粒的失效數目。在 另一實施例中，警示裝置117可為一遠端伺服器，透過線 路、有線或無線網路、藍芽、紅外線等等的傳輸方式接收 並判斷編碼器114傳送的資料。 第12圖為根據本發明之具有警示裝置的發光二極體 的警示系統的另一實施例的方塊圖。在本實施例中，發光 16 200941018 • 二極體125可由交流LED或高壓直流LED所組成，其中 交流LED或高壓直流LED皆由如第1圖所示之複數個微 晶粒所組成。發光二極體125可以覆晶基板或磊晶完成。 偵測裝置可為一功率變化檢出裝置，如圖中的電阻R1，發 光二極體125與電阻R1可封裝在同一發光二極體單元121 中。警示裝置123包括限流電阻R2以及顯示單元，在圖 中，顯示單元為LED 124。發光二極體單元121、警示裝 置123以及電壓源122的運作方式第7圖的發光二極體的 ❿ 警示系統相同’在此不贅述。發光二極體125具有一第一 電極與一第二電極，其中第二電極與電阻R1的一端耦接， 電阻R1的一端則形成一第三電極。因此發光二極體單元 121便具有三個電極，將電壓源與第一電極以及第二電極 連接便可使發光二極體125發光。而測量第二電極與第三 電極的電壓變化’再透過如第3圖的特性曲線，便可得知 此時發光二極體125内微晶粒失效的情形。 第13圖為根據本發明之具有警示裝置的發光二極體 ® 的警示系統的另一實施例的方塊圖。LED單元131可由交 流LED或高壓直流LED所組成，其中交流LED或高壓直 流LED皆由如第1圖所示之複數個微晶粒所組成。警示裝 置134包括一限流電阻135與顯示單元136。在本實施例 中顯示單元136為具有1.8V啟動電壓的LED。備測裝置 為一電感’電感133根據電流I的變化產生壓降。若由電 感133產生的壓降大於顯示單元136的啟動電壓，則顯示 單元136便會發光。本實施例以電感做為功率變化檢出裝 17 200941018 • 置是針對交流LED中若有微晶粒失效’電流會發生變化的 特徵所做的應用，電感133亦可由一感應線圈所形成。 第14圖為根據本發明之具有警示裝置的發光二極體 的警示系統的另一實施例的方塊圖。LED單元141由電壓 源142驅動。LED單元141可由交流LED或高壓直流LED 所組成，其中交流LED或高壓直流LED皆由如第1圖所 示之複數個微晶粒所組成。偵測裝置為一電壓檢出裝置 143 ’由電阻R1與R2串聯所形成。警示裝置144具有第 © —發光二極體145以及第二發光二極體146，其中第一發 光二極體145耦接端點Ν1與Ν3，第二發光二極體146耦 接端點Ν2與Ν3。當端點Ν1與Ν3的電壓差大於第一發光 二極體145的啟動電壓時，第一發光二極體145發光。當 端點Ν2與Ν3的電壓差大於第二發光二極體146的啟動電 壓，第二發光二極體146發光。利用這樣的方式，就可 以依據不同的微晶粒的失效數點亮不同的發光二極體。若 第一發光二極體145與第二發光二極體146的啟動電壓相 同時’第一發光二極體145會比第二發光二極體146早發 光。在另一實施例中’第一發光二極體145與第二發光二 極體146具有不同的顏色及波長。 雖然本發明已以具體實施例揭露如上，然其僅為了易 於說明本發明之技術内容，而並非將本發明狹義地限定於 該實施例，任何所屬技術領域中具有通常知識者，在不脫離本 發明之精神和範圍内，當可作些許之更動與潤飾，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。 18 200941018 . 【圖式簡單說明】 第1圖為LED微晶粒的結構示意圖。 第2A〜2F圖為一交流LED中失效的微晶粒數與交流 LED的V-I-W示意圖。 第3圖表示在定電壓系統的驅動下，交流LED微晶粒 失效特性變動率圖。 第4圖為根據本發明之發光二極體的顯示系統的一實 施例的方塊圖。 〇 第5圖為根據本發明之發光二極體的顯示系統的另一 實施例的方塊圖。 第6圖為根據本發明之具有警示裝置的發光二極體的 警示系統的一實施例的方塊圖。 第7圖為根據本發明之具有警示裝置的發光二極體的 警示系統的另一實施例的方塊圖。 第8圖為根據本發明之具有警示裝置的發光二極體的 警示系統的另一實施例的方塊圖。 © 第9圖為根據本發明之具有警示裝置的發光二極體的 警示系統的另一實施例的方塊圖。 第10圖為根據本發明之具有警示裝置的發光二極體 的警示系統的另一實施例的方塊圖。 第11圖為根據本發明之具有警示裝置的發光二極體 的警示系統的另一實施例的方塊圖。 第12圖為根據本發明之具有警示裝置的發光二極體 的警示系統的另一實施例的方塊圖。 19 200941018 第13圖為根據本發明之具有警示裝置的發光二極體 的警示系統的另一實施例的方塊圖。 第14圖為根據本發明之具有警示裝置的發光二極體 的警示系統的另一實施例的方塊圖。 【主要元件符號說明】The second voltage source, the resistors R3 and R·4', and the warning LED 87 are provided. The resistor R3 has a -th terminal coupled to the second voltage source 86. The warning LED 87 has a first end, a second end mismatched to the resistor R3, and a second end grounded through the resistor r4, wherein the second end of the vigilance optical diode 87 receives the light The first end of element 85b. By adjusting the voltage value of R3#R4 to adjust the voltage of %, the warning light-emitting diode 87 can be made in this embodiment, and the LED 85a in the optical coupler 85 needs 11V to emit light. It is assumed that in the case where there is no micro-grain burn-in, the current flowing through the LED unit 81 is 100 mA, and the resistance value of R1 is 75 Ω, so that the voltage drop generated by R1 is 0.75 V' is insufficient to cause the LED 85a to emit light. When the number of failures of the microcrystal grains is 4, the current flowing through the LED unit 81 is 162 mA. At this time, the voltage drop generated by R1 is 1.21 V, and the LED 85a is caused to emit light, and the light receiving element 85b is turned on. When the light receiving element 85b is turned on, the voltage ye is pulled to the ground potential, and it is known that the light emitting body 87 cannot emit light, and the warning function is achieved. In addition, a monitoring device (not green on the picture) can be used to monitor the voltage Vc at any time. When the standby voltage Vc becomes 〇, it indicates that the micro-grain loss in the lED unit 81 at this time is 13 200941018 . Fig. 9 is a block diagram showing another embodiment of the warning system of the light-emitting diode having the warning device according to the present invention. Compared with the eighth figure, the difference is in the position of the warning light-emitting diode 87, and the warning light-emitting diode 87 starts to emit light, and when the light-receiving element 85b is turned on, the voltage Vc is pulled to the ground potential. The polar body 87 will only emit light. The LED unit 81 is driven by a first voltage source 82. The power change detecting means 83 includes a resistor R1, a photocoupler 85, and a current limiting resistor R2. The photocoupler 85 includes an LED ❹ 85a and a light receiving element 85b, which are turned on when the light receiving element 85b receives the light. The resistor IU has a first end and a second end, wherein the first end is coupled to the LED unit 81, and the second end is coupled to the first voltage source 82. The current limiting resistor R2 has a first end and a second end, wherein the first end is coupled to the first end of the resistor R1. The optical connector 84 has a first end connected to the second end of the current limiting resistor R2, and a second end coupled to the second end of the resistor R1. The optocoupler is coupled to the alerting device 84 to cause the warning LEDs 87 in the alerting device 84 to be turned "on" when the optocoupler 84 is enabled. The warning device 84 includes a second voltage source 86, resistors R3 and R4, and a warning LED 87. By adjusting the resistance values of R3 and R4 to adjust the voltage of Vc, the warning light-emitting diode 87 does not emit light at the beginning. In the present embodiment, the LED 85a in the optical coupler 85 requires 1.1 V to emit light. It is assumed that in the case where there is no micro-grain burn-in, the current flowing through the LED unit 81 is 100 mA, and the resistance value of R1 is 7.5 ω, so the voltage drop generated by R1 is 0.75 V, which is insufficient for the LED 85a to emit light. When the number of failures of the microcrystals is 200941018 = 'the current flowing through the LED unit 81 is coffee A, and the heart = voltage drop is (10), the LED 85a can be made to emit light, and the light receiving element (4) can be turned on. When the light-receiving element 85b is turned on, the voltage % is pulled to the ground potential, so that the warning light-emitting diode 87 is connected to the warning function by the (four) light. Further, the voltage % can be monitored at any time by using a monitoring device (not shown), and when the voltage Vc becomes 〇, it means that the number of failures of the microcrystal grains in the LED unit 81 at this time is four. Figure 10 is a block diagram of another embodiment of a warning system for a light-emitting diode package having a warning device in accordance with the present invention. The LED unit 101 is driven by a voltage source 102. The LED unit 101 can be composed of an alternating current LED or a high voltage direct current LED. The alternating current LED or the high voltage direct current LED is composed of a plurality of micro-crystals as shown in the figure, and the LED unit 101 is coupled to a detecting device, in this embodiment. The detecting device can be a power change detecting device, such as the resistor R1 in the figure. In addition, the detecting device may further include an amplifying circuit 1〇3 for amplifying the voltage VI and transmitting the result to the controller 104. In this embodiment, an analog to digital converter can be coupled before or after the amplifying circuit 103 to convert the voltage VI into a digital signal. The controller 104 can calculate the number of failures of the LED microcrystals in the current LED unit 101 by the characteristic curve of the LEDs in the LED unit 101, as shown in Fig. 3, by the change of the voltage VI. The controller 104 then displays the result through the display device 105. The controller 1〇4 can display the number of failures of the LED micro-die in the LED unit 101 through the display device 105 in a text or graphic manner. Figure 11 is a block diagram showing another embodiment of the warning system of the light-emitting diode 200941018 with the warning device according to the present invention. The LED unit 111 is driven by a voltage source 112. The LED unit 111 may be composed of an alternating current LED or a high voltage direct current LED, wherein the alternating current LED or the high voltage direct current LED is composed of a plurality of microcrystal grains as shown in Fig. 1. The LED unit 111 is coupled to a detecting device. In this embodiment, the detecting device can be a power change detecting device, such as the resistor R1 in the figure. In addition, the detecting device may further include a controller 113 and an encoder 114. The controller 113 monitors the change of the voltage VI and transmits the characteristic curve of the LED in the LED unit 111, as shown in FIG. The number of failures of the LED microcrystals in the LED unit 111. Next, the controller 113 transmits the result to the encoder 114 for encoding, and then transmits it to the alerting device 117. The transmission between the encoder 114 and the alerting device 117 can be accomplished by means of transmission over a line, wired or wireless network, Bluetooth, infrared, etc., and corresponding transmitters and receivers are also necessary. of. In the present embodiment, the alerting device 117 is remotely monitored for monitoring the use of the LED unit 111. This can be applied to the monitoring of traffic signs and G replacement before the traffic signal is completely faulty. The decoder 115 receives the data of the encoder 114 and decodes it, and transmits the decoded result to the monitoring unit 116. The monitoring unit 116 can know the number of failures of the LED microcrystals in the LED unit 111 at this time. In another embodiment, the alerting device 117 can be a remote server that receives and determines the data transmitted by the encoder 114 via a transmission of a line, a wired or wireless network, Bluetooth, infrared, or the like. Fig. 12 is a block diagram showing another embodiment of the warning system of the light-emitting diode having the warning device according to the present invention. In this embodiment, the illumination 16 200941018 • The diode 125 may be composed of an alternating current LED or a high voltage direct current LED, wherein the alternating current LED or the high voltage direct current LED is composed of a plurality of microcrystals as shown in FIG. The light emitting diode 125 can be completed by flip chip or epitaxy. The detecting device can be a power change detecting device. As shown in the figure, the resistor R1, the light emitting diode 125 and the resistor R1 can be packaged in the same LED unit 121. The alerting device 123 includes a current limiting resistor R2 and a display unit. In the figure, the display unit is an LED 124. The operation of the light-emitting diode unit 121, the warning device 123, and the voltage source 122 is the same as that of the light-emitting diode of Fig. 7 and will not be described herein. The light-emitting diode 125 has a first electrode and a second electrode, wherein the second electrode is coupled to one end of the resistor R1, and one end of the resistor R1 forms a third electrode. Therefore, the light-emitting diode unit 121 has three electrodes, and the voltage source is connected to the first electrode and the second electrode to cause the light-emitting diode 125 to emit light. By measuring the voltage change of the second electrode and the third electrode and then transmitting the characteristic curve as shown in Fig. 3, it can be known that the microcrystal grains in the light-emitting diode 125 are ineffective at this time. Figure 13 is a block diagram of another embodiment of a warning system for a light-emitting diode ® having a warning device in accordance with the present invention. The LED unit 131 may be composed of an alternating current LED or a high voltage direct current LED, wherein the alternating current LED or the high voltage direct current LED is composed of a plurality of microcrystal grains as shown in Fig. 1. The alerting device 134 includes a current limiting resistor 135 and a display unit 136. In the present embodiment, the display unit 136 is an LED having a starting voltage of 1.8V. The standby device is an inductor. The inductor 133 produces a voltage drop based on the change in current I. If the voltage drop generated by the inductance 133 is greater than the startup voltage of the display unit 136, the display unit 136 will emit light. In this embodiment, the inductor is used as the power change detection device. 17 200941018 • The application is made for the characteristic that the current changes when the micro-LED fails in the AC LED, and the inductor 133 can also be formed by an induction coil. Fig. 14 is a block diagram showing another embodiment of the warning system of the light-emitting diode having the warning device according to the present invention. The LED unit 141 is driven by a voltage source 142. The LED unit 141 may be composed of an alternating current LED or a high voltage direct current LED, wherein the alternating current LED or the high voltage direct current LED is composed of a plurality of microcrystal grains as shown in Fig. 1. The detecting means is a voltage detecting means 143' formed by connecting resistors R1 and R2 in series. The warning device 144 has a first light-emitting diode 145 and a second light-emitting diode 146, wherein the first light-emitting diode 145 is coupled to the end points Ν1 and Ν3, and the second light-emitting diode 146 is coupled to the end point Ν2 and Ν 3. When the voltage difference between the terminals Ν1 and Ν3 is greater than the starting voltage of the first light-emitting diode 145, the first light-emitting diode 145 emits light. When the voltage difference between the terminals Ν2 and Ν3 is greater than the starting voltage of the second illuminating diode 146, the second illuminating diode 146 emits light. In this way, different light-emitting diodes can be illuminated depending on the number of failures of different micro-grains. If the first light-emitting diode 145 and the second light-emitting diode 146 have the same starting voltage, the first light-emitting diode 145 emits light earlier than the second light-emitting diode 146. In another embodiment, the first light emitting diode 145 and the second light emitting diode 146 have different colors and wavelengths. The present invention has been described above with reference to the specific embodiments, and is merely illustrative of the technical scope of the present invention, and is not intended to limit the scope of the present invention to the embodiments. In the spirit and scope of the invention, the scope of the invention is defined by the scope of the appended claims. 18 200941018 . [Simple description of the diagram] Figure 1 is a schematic diagram of the structure of the LED micro-grain. Figures 2A to 2F are schematic diagrams showing the number of failed micro-grains in the AC LED and the V-I-W of the AC LED. Figure 3 shows the rate of change in the failure characteristics of the AC LED micro-crystals driven by a constant voltage system. Fig. 4 is a block diagram showing an embodiment of a display system of a light-emitting diode according to the present invention. Figure 5 is a block diagram showing another embodiment of a display system for a light-emitting diode according to the present invention. Fig. 6 is a block diagram showing an embodiment of a warning system for a light-emitting diode having a warning device according to the present invention. Fig. 7 is a block diagram showing another embodiment of the warning system of the light-emitting diode having the warning device according to the present invention. Fig. 8 is a block diagram showing another embodiment of the warning system of the light-emitting diode having the warning device according to the present invention. © Fig. 9 is a block diagram showing another embodiment of the warning system of the light-emitting diode having the warning device according to the present invention. Fig. 10 is a block diagram showing another embodiment of the warning system of the light-emitting diode having the warning device according to the present invention. Figure 11 is a block diagram showing another embodiment of an alerting system for a light-emitting diode having a warning device in accordance with the present invention. Fig. 12 is a block diagram showing another embodiment of the warning system of the light-emitting diode having the warning device according to the present invention. 19 200941018 Figure 13 is a block diagram of another embodiment of a warning system for a light-emitting diode with a warning device in accordance with the present invention. Fig. 14 is a block diagram showing another embodiment of the warning system of the light-emitting diode having the warning device according to the present invention. [Main component symbol description]
21〜電壓 22〜電流 23〜功率 31〜單PN接面LED失效曲線 32〜功率 33〜光通量 34〜轉換率 41〜電壓源 42〜可變電阻 43〜LED單元 44〜光偵測器 51〜控制器 5 2〜電流源 53〜LED單元 54〜光偵測器 61〜LED單元 62〜電壓源 63〜偵測裝置 64〜警示裝置 20 200941018 . 71〜LED單元 72〜電壓源 73〜功率變化檢出裝置 74〜警示裝置 75〜限流電阻 76〜顯示單元 81〜]JED單元 82〜第一電壓源 ⑩ 83〜功率變化檢出裝置 84〜警示裝置 85〜光輛合器 8 6〜第二電壓源 101〜LED單元 102〜電壓源 103〜放大電路 104〜控制器 Θ 105〜顯示裝置 111〜LED單元 112〜電壓源 113〜控制器 114〜編碼器 115〜解碼器 116監控單元 117〜警示裝置 21 200941018 . 121〜LED單元 122〜電壓源 123〜警示裝置 131〜LED單元 132〜電壓源 133〜電感 134〜警示裝置 135〜限流電阻 參 136〜顯示單元 141〜LED單元 142〜電壓源 143〜功率變化檢出裝置 144〜警示裝置21~voltage 22~current 23~power 31~single PN junction LED failure curve 32~power 33~light flux 34~conversion rate 41~voltage source 42~variable resistor 43~LED unit 44~photodetector 51~control Device 5 2 to current source 53 to LED unit 54 to photodetector 61 to LED unit 62 to voltage source 63 to detecting device 64 to warning device 20 200941018 . 71 to LED unit 72 to voltage source 73 to power change detection Device 74 to warning device 75 to current limiting resistor 76 to display unit 81 to] JED unit 82 to first voltage source 10 83 to power change detecting device 84 to warning device 85 to optical clutch device 8 to second voltage source 101 to LED unit 102 to voltage source 103 to amplifier circuit 104 to controller Θ 105 to display device 111 to LED unit 112 to voltage source 113 to controller 114 to encoder 115 to decoder 116 monitoring unit 117 to warning device 21 200941018 121 to LED unit 122 to voltage source 123 to warning device 131 to LED unit 132 to voltage source 133 to inductor 134 to warning device 135 to current limiting resistor 136 to display unit 141 to LED unit 142 to voltage source 143 to power change Check out 144~ warning device
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