M333743 八、新型說明： 【新型所屬之技術領域】 本創作係關於一種偵測裝置，特別是關於一種用以偵測包含 至少一個發光二極體之一發光裝置的異常狀態之偵測裝置。 【先前技術】 目别為止’冷陰極燈管(cold cathode fluorescent lamp，CCFL) 廣泛應用於大尺寸LCD、LCD TV、掃描器、廣告燈箱以及筆記 φ 型電腦等電子設備之背光源。這是因為冷陰極燈管具有燈管細 小、結構簡單、燈，表面溫度升幅小、燈管表面亮度高、易加工 成各種形狀、使用壽命長、顯色性好以及發光均勻等優點。 然而’發光一極體(light_emitting diode，LED)比冷陰極燈管具 有更省電、壽命更長、色彩飽和度高、反應速度快、耐震耐壓^ 體積小等多項優點。所以，採用發光二極體燈f作為背光光源了 疋未來最有希望替代傳統冷陰極螢光管的技術。 'M333743 VIII. New description: [New technical field] The present invention relates to a detecting device, and more particularly to a detecting device for detecting an abnormal state of a light-emitting device including at least one light-emitting diode. [Prior Art] The cold cathode fluorescent lamp (CCFL) is widely used in large-size LCDs, LCD TVs, scanners, advertising light boxes, and backlights for electronic devices such as notebook computers. This is because the cold cathode lamp has the advantages of small lamp tube, simple structure, small lamp surface temperature rise, high brightness of the surface of the lamp tube, easy processing into various shapes, long service life, good color rendering and uniform light emission. However, the light-emitting diode (LED) has more advantages than the cold cathode lamp, such as more power saving, longer life, higher color saturation, faster reaction speed, shock and pressure resistance, and smaller volume. Therefore, the use of a light-emitting diode lamp f as a backlight source is the most promising technology for replacing the conventional cold cathode fluorescent tube in the future. '
驭現毀，將便侍贫无二極體燈管的光線均勻度下降並影響電子設 備之使用品質。 ϋ 、因此，賴狀轉鱗在於提供—樹貞職置，以解決上 迷問題。 【新型内容】 態之偵測裝置。該發光裝置包含至少一 咼準位端。 本創作ΐ 了 ϊίί ί提供—種用以_-發光裝置之異常狀 個發光二極體並且具有一 5 M3 3 3 743 關電作之—具體實施财，該侧裝置包含一第一開 電源端料::開關電路。該第—開關電路係電連接於一供電 二：二開關回應該供電電源端與該高準位端間之 間。ϊίίϊΐΐ路係電連接於該第—開關與—參考電源端之 關供應一參考電壓。該第二開關電路包含一第二 二關雷開關回應該第—開關的開啟而開啟，致使該第 代表該發絲置—伽_。該細電壓即 式得點與精神可以藉由以下的創作詳述及所附圖 【實施方式】 裝置。圖—騎示根據本創狀—具體實施例之偵測 i例而士 4二ΐ測裝置1用以偵測發光裝置2之異常狀態。 ΐ ii型ίίί j以是lcd、lcd w、掃描器、廣告燈 =之背光源。發光裝置2包含至少—個 路或且該異常狀態可以指發光裝置2中之發光二極體2〇斷 日呈ί示，發光裝置2可以包含複數個發光二極體20並 二準端。偵測裝置1包含第—開關電路W以及第二 :Ϊ 2 H—^關電路10係電連接於一供電電源端Vs與發 & 位端之間。第—關電路ω包含第一開關 -電位差_辭位端間之 於實際應用中，第一開關100可以是一金氧半場效電晶體 M333743 (metal-oxide-semiconductor field-effect transistor, MOSFET)或一双 接面電晶體(bipolar junction transistor, BJT)，但不以此為限。 第二開關電路12係電連接於第一開關loo與參考電源端VR 之間。參考電源端VR供應一參考電壓。第二開關電路12包含第 二開關120,並且第二開關12〇回應第一開關100的開啟而開 啟，致使第二開關電路12進而基於該參考電壓輸出偵測電壓 Vd。偵測電壓Vd可以代表發光裝置2之異常狀態。 於實際應用中，苐^一開關120可以是一金氧半場效電晶體、 % _双接面電晶體或一光耦合器(photo coupler)，但不以此為限。 如圖一所示，於此實施例中，第一開關1〇〇可以是一 PM〇s 電晶體，並且第二開關120可以是一光耦合器。節點A代表發光 裴置2之該高準位端，並且節點B代表pM〇s電晶體之源極。 • 當發光裝置2中之每一個發光二極體2〇於正常工作時，節 點A的電壓係小於節點B的電壓。因此，該pM〇s電晶體會導 通，並且该光耦合器也跟著導通。此時，該光耦合器輸出第一偵 ，電壓Vd。第一偵測電壓Vd即代表發光裝置2處於正常工作 • 態。 當發光裝置2中之任一個發光二極體2〇斷路或燒毀時，節 點A的^麈會等於節點B的電壓。因此，該pM〇s電晶體會截 止，並且戎光耦合器也跟著截止。此時，該光耦合器輸出第二偵 剛電壓Vd。第二偵測電壓Vd即代表發光裝置2發生異常狀態。、 〜凊參閱圖二。圖二係繪示由圖一中之偵測裝置1所延伸之另 =體實_之電關。如圖二所示，耦合騎產生之偵測 概堊Vd可以輪出至一電晶體M之—端點。於實際應用中，電晶 〜14可以疋一金氧半場效電晶體14或一双接面電晶體14。 7 M3 3 3 743 於此實施例中，電晶體14可以是一 NMOS電晶體14，並且 該端點係NMOS電晶體14之閘極(Gate)。 ，由於巧二偵測電壓Vd代表發光裝置2發生異常狀態，假設 該光耦合器輸出第二偵測電壓vd至NM〇s電晶體14之閘極， ίΐϊΐ貞測電壓Vd，NMOS電晶體14會輸出—相對應的控制 電聖Vc至一保濩電路(未顯示於圖二中）。 政當該保魏路接收顺制賴Ve後，雜護可以 置2之供電電源端Vs g閉以避免更多發光二極體2“ 生發出—警綠號，以告知使用者發光 際f用中，該賴路之功用可依實 LCD或 配一保護 電子設備之使用 筆記偵測 態。針對节显當狀ίϋ所構成之背光源是否發生異常狀 ίΐ 月光源，進而確保應用該背光源之 創作具S例之詳述，係希望能更加清楚描述本 本創作之範疇加以限制。相3述具體實施例來對 此，本創作所”之專^^欲中睛之專利範圍的範舞内。因 廣的解釋，以致使其涵蓋戶;罐上述的說明作最寬 叮百了犯的改變以及具相等性的安排。 M3 3 3 743 【圖式簡單說明】 圖一係繪示根據本創作之一具體實施例之偵測裝置之電路 圖。 圖二係繪示由圖一中之偵測裝置所延伸之另一具體實施例之 電路圖。 【主要元件符號說明】 1 :偵測裝置 2:發光裝置 10 :第一開關電路 12 :第二開關電路 14 :電晶體 20 :發光二極體 100 :第一開關 120 :第二開關 Vs :供電電源端 VR :參考電源端 Vd :偵測電壓 Vc :控制電壓When it is destroyed, it will reduce the uniformity of light in the poor diode lamp and affect the quality of electronic equipment. ϋ 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 [New content] State detection device. The illumination device includes at least one of the alignment terminals. The present invention provides an abnormally shaped light-emitting diode for the _-light-emitting device and has a 5 M3 3 3 743 turn-off power - the side device includes a first power-on terminal Material:: Switch circuit. The first switch circuit is electrically connected to a power supply 2: the second switch is returned between the power supply end and the high level end. The ϊίίϊΐΐ circuit is electrically connected to the first switch and the reference power supply terminal to supply a reference voltage. The second switch circuit includes a second and second lightning switch that is turned on and turned on by the first switch, so that the first representative of the hair is set to gamma. The details of the fine voltage and the spirit can be explained by the following creations and the accompanying drawings. FIG. 1 is a detection device according to the present invention. The detection device 1 is used to detect the abnormal state of the illumination device 2. ΐ ii type ίίί j is the backlight of lcd, lcd w, scanner, advertising light. The illuminating device 2 includes at least one path or the abnormal state may refer to the illuminating diode 2 in the illuminating device 2, and the illuminating device 2 may include a plurality of illuminating diodes 20 and two terminals. The detecting device 1 includes a first switching circuit W and a second: Ϊ 2 H-^ circuit 10 is electrically connected between a power supply terminal Vs and a transmitter terminal. The first-off circuit ω includes a first switch-potential difference_between the end of the circuit, and the first switch 100 can be a metal-oxide-semiconductor field-effect transistor (MOSFET) or A bipolar junction transistor (BJT), but not limited to this. The second switch circuit 12 is electrically connected between the first switch loo and the reference power terminal VR. The reference power supply terminal VR supplies a reference voltage. The second switch circuit 12 includes a second switch 120, and the second switch 12 turns on in response to the turning on of the first switch 100, so that the second switch circuit 12 further outputs a detection voltage Vd based on the reference voltage. The detection voltage Vd may represent an abnormal state of the light-emitting device 2. In practical applications, the switch 120 can be a gold oxide half field effect transistor, a % _ double junction transistor or a photo coupler, but is not limited thereto. As shown in FIG. 1, in this embodiment, the first switch 1〇〇 may be a PM〇s transistor, and the second switch 120 may be an optical coupler. Node A represents the high level end of the illumination device 2, and node B represents the source of the pM〇s transistor. • When each of the light-emitting diodes 2 of the light-emitting device 2 is in normal operation, the voltage of the node A is smaller than the voltage of the node B. Therefore, the pM〇s transistor is turned on, and the photocoupler is also turned on. At this time, the optical coupler outputs the first detection voltage Vd. The first detection voltage Vd represents that the illumination device 2 is in a normal operation state. When any of the light-emitting diodes 2 of the light-emitting device 2 is broken or burned, the voltage of the node A will be equal to the voltage of the node B. Therefore, the pM〇s transistor is cut off and the dimming coupler is also turned off. At this time, the photocoupler outputs the second detected voltage Vd. The second detection voltage Vd represents an abnormal state of the light-emitting device 2. ~ 凊 Refer to Figure 2. FIG. 2 is a diagram showing the electric switch of the other body extended by the detecting device 1 in FIG. As shown in Figure 2, the detection of the coupled rider Vd can be rotated to the end of a transistor M. In practical applications, the electro-crystals 14 can be a gold-oxygen half field effect transistor 14 or a double junction transistor 14. 7 M3 3 3 743 In this embodiment, the transistor 14 may be an NMOS transistor 14, and the terminal is a gate of the NMOS transistor 14. Since the detection voltage Vd represents an abnormal state of the light-emitting device 2, it is assumed that the photocoupler outputs the second detection voltage vd to the gate of the NM〇s transistor 14, the voltage Vd, and the NMOS transistor 14 Output - Corresponding control circuit Vc to a protection circuit (not shown in Figure 2). After the Baowei Road receives the shun wei, the Guardian can set the power supply terminal Vs g to close to avoid more LEDs 2 to send out the police green number to inform the user of the use of the light. In the middle, the function of the Lai can be used to detect the state of the LCD or with a protective electronic device. Whether the backlight is formed by the backlight is abnormal, and the backlight is used to ensure the application of the backlight. The details of the S example are created, and it is hoped that the scope of the creation of the book will be more clearly defined. In contrast to the specific examples, the creation of the book is in the scope of the patent scope of the patent. Because of the wide interpretation, it has covered the household; the above description of the tank has made the widest possible changes and equal arrangements. M3 3 3 743 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit diagram showing a detecting device according to an embodiment of the present invention. Figure 2 is a circuit diagram showing another embodiment extending from the detecting device of Figure 1. [Main component symbol description] 1 : Detection device 2: Light-emitting device 10: First switch circuit 12: Second switch circuit 14: Transistor 20: Light-emitting diode 100: First switch 120: Second switch Vs: Power supply Power terminal VR: reference power terminal Vd: detection voltage Vc: control voltage