M341159 八、新型說明： 【新型所屬之技術領域】 本創作係為一種LED燈管結構，特別是關於一種可直 接安裝於現有的日光燈具上的LED燈管，不需更改現有曰 光燈具之結構，達成節約能源之目的。 '【先前技術】 . 按，傳統的日光燈是利用交流閃爍的高壓電驅動曰光 * 燈管中的氬氣放電，氬氣所放出的電子高速撞擊汞蒸氣中 的水銀原子發出短波光（紫外光），再由管壁的螢光粉吸收 短波光（紫外光），放出長波光，發出尤如白晝般的日光效 果，由於價格低廉，因此日光燈是目前最常用的照明燈 具，然而日光燈管内含有汞及螢光粉，對人體的傷害及環 境的污染相當嚴重，且日光燈所發出之光源為閃爍光，對 人眼的傷害相當大，造成學子們的近視及閃光，因此先進 _ 國家已逐漸淘汰了的日光燈管的使用。 、而目前的電子式省電燈泡雖然較日光燈管省電，但由 於其發光原理相同，仍然有環保的問題，而根據調查全世 界日光燈管的用量仍是電子式省電燈泡的5倍，而使用 LED燈比傳統日光燈省電100倍，其使用壽命更是傳統曰 光燈的10倍，相當節省能源，又無環境污染的問題，因此 利用更省電、更環保的LED燈完全取代日光燈管，將是未 來的趨勢。 然而目前的LED燈產品不論結構或是電路，都是重新 M341159 設計出新款的LED燈具，並無法相容於傳統的燈1上，因 此若要安裝LED燈，則必需拋棄舊日光燈組，重新講置整 組燈具，並搭配其電路才能使用，每家廠商所開發的LED 燈具， ·不論其燈管、燈具或電路又都彼此不相容，以目前 用1最大的日光燈具來說，其實是造成更多的資源浪費。 職疋’本案新型人為了能節約能源，並解決上述現有 ' LED㈣缺失與残，75特潛心研究設計種LED日光 ❿燈f，可安裝於現有的日紐具上，完全不需要更改日光 燈具上的結構，達成真正節省能源的目的。 【新型内容】 本創作係提供—種led燈管結構，相容於現有日光燈 具，以安裝在現有的日光燈具上，完全不需要更改現有= 光燈具的結構，以達到節能、省電、環保，以及使用舊燈 具之資源再利用的目的。 i 為達成上述目的，本創作之主要技術特徵係在於提供 -種LED燈官結構，包括一前蓋，其上設有複數貫穿圓 孔；複數光罩組，呈圓錐狀組裝於該前蓋外侧，其錐部嵌 入該圓孔中，錐底開設一小圓孔；至少一led基板組，配 設於該前蓋之内側，包含一LEd基板、複數串接於該led 基板上之LED晶元組及一金屬散熱鰭片，該些lEd晶元組 恰可對應於光罩組之小圓孔，該金屬散熱鰭片組裝於該 LED基板之背面；及一交換式電源轉換電路，配設於該前 蓋之内侧’電連接該些相互串接之LEd晶元組，用以將日 M341159 光燈具上之電力轉換為穩定之直流電，以驅動該些LED 晶元組發光。 為達成上述目的，本創作之次一技術特徵係在於提供 一種LED燈管結構，其中該光罩組更包括；一圓錐殼體， 錐底開設一小圓孔；一光學件，呈圓錐狀嵌裝於該圓錐殼 體之内部，其内緣面係為一反光鏡面，該光學件之底部設 有一凹透鏡；及一透鏡蓋，組裝於該圓錐殼體之開口部， 可將該光學件鎖固於圓錐殼體内，該透鏡蓋上設有一凸透 鏡。 為達成上述目的，本創作之另一技術特徵係在於提供 一種驅動LED燈管之交換式電源轉換電路，包括一交流電 輸入單元，電連接日光燈具之電力，用以將該交流閃爍之 高電壓整流成直流電壓；一降壓變壓器，設有一次侧輸入 端、二次側輸出端及一次侧耦合輸出端，該一次侧輸入端 係電連接該交流電輸入單元，以接取其直流電壓；一PWM 振盪控制單元，係電連接該降壓變壓器一次侧之耦合輸出 端，主要由一PWM振盪器及一場效電晶體所組成，該場 效電晶體係串接於該降壓變壓器之一次侧輸入端，以控制 該降壓變壓器之二次側輸出端輸出高頻振盪方波；及一直 流電輸出單元，係電連接該降壓變壓器之二次侧輸出端， 用以將該降壓變壓器輸出之高頻振盪方波整流成一低壓 直流電輸出，驅動LED晶元組發光。 【實施方式】 M341159 為了使貴審查委員能更進一步瞭解本創作為達成 預定目的所採取之技術、手段及功效，請參閱以下有關本 創作之詳細說明與附圖，相信本創作之目的、特徵與特 點’當可由此得一深入且具體之瞭解，然而所附圖式僅提 供參考與說明用，並非用來對本創作加以限制者。 本創作係為一種可安裝於現有曰光燈具上的LED燈 管，因此本創作LED燈管的形狀及尺寸必需要符合現有多 鲁 種長度尺寸的日光燈管，雖然日光燈管的形狀有分長條管 狀及環管狀，但長條管狀的使用量較多，因此本創作以長 管狀為實施例加以說明，請參閱圖—及圖二所示，係為本 創作LED燈管結構之實施例外觀示意圖及圖一之立體分 解圖。M341159 VIII. New Description: [New Technology Field] This creation is a kind of LED tube structure, especially for an LED tube that can be directly installed on existing daylight lamps, without changing the structure of existing neon lamps. To achieve the goal of saving energy. '[Prior Art]. According to the traditional fluorescent lamp, the argon gas in the fluorescent lamp is driven by the high-frequency electric current of the alternating flashing light. The electrons emitted by the argon gas collide with the mercury atom in the mercury vapor to emit short-wave light (ultraviolet light). Light), the fluorescent powder on the tube wall absorbs short-wave light (ultraviolet light), emits long-wave light, and emits a white light effect. Because of its low price, fluorescent lamps are currently the most commonly used lighting fixtures, but fluorescent tubes contain Mercury and fluorescent powder, the damage to the human body and the environment are very serious, and the light source emitted by the fluorescent lamp is flashing light, which is quite harmful to the human eye, causing myopia and flash of the students, so the advanced _ country has gradually eliminated The use of the fluorescent tube. However, the current electronic power-saving bulbs save energy compared to fluorescent tubes, but because of the same principle of illumination, there are still environmental problems. According to the survey, the amount of fluorescent tubes in the world is still 5 times that of electronic energy-saving bulbs, and LEDs are used. The lamp is 100 times more energy-efficient than the traditional fluorescent lamp, and its service life is 10 times that of the traditional neon lamp. It is energy-saving and has no environmental pollution. Therefore, it is completely replaced by a more energy-saving and environmentally-friendly LED lamp. It is the future trend. However, the current LED lamp products, regardless of structure or circuit, are redesigned M341159 to design new LED lamps, which are not compatible with the traditional lamp 1. Therefore, if you want to install LED lights, you must abandon the old fluorescent lamps and re-speak. Set up the luminaires and use them with their circuits. The LED luminaires developed by each manufacturer, regardless of their lamps, lamps or circuits, are incompatible with one another. Cause more resources to waste. In order to save energy and solve the above-mentioned existing 'LED (four) missing and disabled, the new type of LED light-emitting lamp is designed to be installed on the existing Japanese neon, and there is no need to change the daylight fixture. The structure achieves the goal of truly saving energy. [New content] This creation department provides a kind of led light tube structure, which is compatible with existing daylight lamps to be installed on existing daylight lamps. It does not need to change the structure of existing = light fixtures to achieve energy saving, power saving and environmental protection. And the purpose of reusing the resources of the old lamps. i In order to achieve the above objectives, the main technical feature of the present invention is to provide an LED lamp official structure, comprising a front cover having a plurality of through-holes; a plurality of photomasks assembled in a conical shape outside the front cover The tapered portion is embedded in the circular hole, and a small circular hole is formed in the bottom of the cone; at least one LED substrate group is disposed on the inner side of the front cover, and includes an LEd substrate and a plurality of LED wafers serially connected to the LED substrate And a metal heat sink fin, the lEd crystal unit group corresponding to the small round hole of the photomask group, the metal heat sink fin is assembled on the back side of the LED substrate; and an exchange power conversion circuit is disposed on the The inner side of the front cover is electrically connected to the LEd cell groups connected in series to convert the power on the day M341159 light fixture into a stable direct current to drive the LED chip sets to emit light. In order to achieve the above object, the second technical feature of the present invention is to provide an LED lamp tube structure, wherein the photomask group further comprises: a conical shell, the cone bottom defines a small circular hole; and an optical member is conicalally embedded. Mounted in the inner portion of the conical housing, the inner edge surface is a mirror surface, the bottom of the optical member is provided with a concave lens; and a lens cover is assembled on the opening portion of the conical housing to lock the optical member In the conical housing, the lens cover is provided with a convex lens. In order to achieve the above object, another technical feature of the present invention is to provide an exchange power conversion circuit for driving an LED lamp, comprising an AC input unit electrically connecting the power of the daylight lamp for rectifying the high voltage of the AC flashing a DC voltage; a step-down transformer having a primary side input end, a secondary side output end and a primary side coupled output end, the primary side input end electrically connected to the alternating current input unit to receive its DC voltage; The oscillation control unit is electrically connected to the coupled output end of the primary side of the step-down transformer, and is mainly composed of a PWM oscillator and a field effect transistor, and the field effect transistor system is serially connected to the primary side input end of the step-down transformer. To control the secondary side output end of the step-down transformer to output a high-frequency oscillation square wave; and the all-current output unit is electrically connected to the secondary side output end of the step-down transformer for outputting the step-down transformer The frequency oscillating square wave is rectified into a low voltage direct current output to drive the LED die set to emit light. [Embodiment] M341159 In order to enable the reviewing committee to further understand the techniques, means and effects of this creation for the purpose of achieving the intended purpose, please refer to the following detailed description and drawings of this creation, and believe that the purpose and characteristics of this creation are The features of the present invention are to be understood as being in no way of limitation. This creation is an LED tube that can be installed on existing neon lamps. Therefore, the shape and size of the LED tube of this creation must meet the existing Dulu length of the fluorescent tube, although the shape of the fluorescent tube has long strips. Tubular and ring-shaped tubular, but the long tubular shape is used in a large amount. Therefore, the present invention is described by using a long tubular shape as an example. Please refer to the figure and FIG. 2, which is a schematic view of the embodiment of the LED lamp tube structure. And the exploded view of Figure 1.
本創作之LED燈管結構係由一前蓋1〇、一後蓋2〇、複 數光罩組30、至少一LED基板組40、一交換式電源轉換電 路50及組裝於前蓋1〇左右兩側之二侧蓋6〇所組成，其中該 • 前蓋10與後蓋20可相互組合後形成有一内部空間，該LED 、 基板組30及交換式電源轉換電路40係配設於該前蓋1〇之 内側，容置於該内部空間中，本創作LED燈管的每一組件 都可讓使用者輕易組裝及拆卸，以方便使用者更換元件或 維修。 其中該前蓋10上設有複數貫穿前蓋10之圓孔n，而該 些光罩組30呈圓錐狀，組裝固定於該前蓋10外側，且其錐 部可嵌入該圓孔11中，如圖三所示係為該光罩組30之立體 分解圖，該光罩組30係設有一圓錐殼體31，錐底開設一小 M341159 圓孔32，一光學件33亦呈圓錐狀，嵌裝於該圓錐殼體31 之内部，一透鏡蓋34組裝於該圓錐殼體31之開口部，可將 該光學件33鎖固於圓錐殼體31内，該光學件33之内緣面係 為一反光鏡面35，底部設有一凹透鏡36,該透鏡蓋34上設 有一凸透鏡37,該光罩組30先利用該凹透鏡36將LED光源 聚光後’藉由該反光鏡面35反射出去，再利用該凸透鏡37 該反光鏡面34所反射的光線再均勻的分散出去，如此藉由 聚光、反射、再散光後，可將LED光源照射的更遠，有效 加強LED光源的光輝度。 請再參閱圖二，其中該LED基板組40包含一LED基板 4卜複數個串接於該LED基板41上之LED晶元組42及一金 屬散熱鰭片43,該些LED晶元組42恰可對應於該些光罩組 30之小圓孔32，該金屬散熱鰭片43係組裝於該LED基板41 之背面上，用以吸收該些LED晶元組42所產生熱能，再傳 導至鰭片上散熱。 • 該些相互串接之LED晶元組42又電連接至該交換式 - 電源轉換電路50，該左右兩側蓋60上各配設有二電接腳61 貫穿侧蓋60本體，以電線電連接至該交換式電源轉換電路 5〇，以接取日光燈具（圖中未示）上之電力，該交換式電源 轉換電路50係可將日光燈具上之電力轉換為穩定之直流 電’以驅動該些LED晶元組42發光。 請參閱圖四所示，係為本創作交換式電源轉換電路5〇 之實施例電路示意圖，由於本創作LED燈管需要相容於現 有的日光燈具，而現有日光燈具之電力是交流閃爍4〇〇伏 M341159 以上的高電壓，因此需要使用將交流高電壓轉換為穩定的 直流低電壓以驅動LED燈發光，若直接使用變壓器降壓， 則需要很大體積的變壓器，如此即無法裝設於LED燈管 内’故本創作使用交換式電源（Switching Power Supply) 的電路架構，不但能縮小變壓器的體積，更能提高電源的 轉換效率。 本創作之交換式電源轉換電路5 0主要包括一交流電 輸入單元51、一直流電輸出單元52、一PWM振盪控制單 ^ 元53及一迴授及過載保護單元54,其中該交流電輸入單元 51係電連接至該日光燈具之電力，主要由橋式整流器 (D1〜D4)、濾波器LF1、電容器C1及降壓變壓器T1所組 成，係用以將該交流閃爍之高電壓整流成直流電壓輸出至 該降壓變壓器T1之一次側輸入端，該降壓變壓器τΐ 一次 侧之另一耦合輸出端電連接至該PWM振盪控制單元53， 用以供應該PWM振盪控制單元53所需之工作電壓。 • 其中該變壓器T1之二次側輸出端受該PWM振盪控制 、 單元53之控制，輸出一高頻振盪方波，該直流電輸出單元 52之輸入端係電連接該變壓器T1二次側輸出端，主要由 一低壓整流器D7、一電感器L1及電容器C8〜C9所組成， 係用以將該降壓變壓器T1輸出之高頻振盪方波整流成一 低壓直流電輸出，以提供驅動LED晶元組發光所需之電 源，較佳地本創作實施例之低壓直流電可為27伏或24伏。 其中該PWM振盪控制單元53主要由一 PWM振盪器 IC1、一場效電晶體Q1及一光辆合器之接收端pciA所組 M341159 成，該場效電晶體Q1係串接於該降壓變壓器丁丨之一次侧 輸入端，該PWM振盪器IC1係接受光耦合器之接收端 PCIA的接收訊號控制輸出一振盪訊號至該場效電晶體 Q1，用以驅動變壓器T1之二次侧輸出端輸出高頻振盪方 波0 其中該迴授及過載保護單元54,主要由二組運算放大 器IC3、二組SCR稽納二極體IC2、IC4及光耦合器之發送 端PC1B所組成，該二組運算放大器IC3及二組SCR稽納二 極體IC2、IC4組成一電壓比較電路，並電連接至直流輸出 單元52，該二組SCR稽納二極體IC2、IC4形成一高、低範 圍内之額定電壓，用以比較直流輸出單元51的輸出端是否 過載（低於額定電壓）或發生高壓輸出（超出額定電壓），以 保護後端之LED晶元組，當有過載發生時，該比較電路會 偵測輸出電壓低於額定電壓，則透過光耦合器之發送端 PC1B迴授至光耦合器之接收端PC1A，控制該PWM振盪控 制單元53停止振盪，直到輸出電壓回到額定電壓時，繼續 振盪輸出穩定的直流電壓。 本創作之直流電輸出單元52其輸出端更設有一高壓 保護電路55,主要由一稽納二極體zd卜電感器L2及電阻 器R15所組成，當直流電輸出單元52之輸出端輸出高電壓 時，會被稽納二極體ZD1箝至在飽和電壓，其餘電壓則降 在電阻器R15上，而該迴授及過載保護單元54中的電壓比 較電路會偵測到超過額定電壓，而透過光耦合器之發送端 PC1B迴授至光耦合器之接收端PC1A，控制該PWM振盪控 M341159 制單元53停止振盪，直到輸出電壓回到額定電壓時，繼續 振盪輸出穩定的直流電壓。 在本創作實施例電路中，更透過該迴授及過载保護單 元54作為LED燈管的啟動開關，主要在該電壓比較電路之 一輸入端A1連接一電阻器R24及二極體D9作為啟動輸入 端A2，當該啟動輸入端A2接地時，該電壓比較電路正常 • 運作，控制該PWM振盪控制單元53振盪，該直流電輸出 ， 單元52即輸出穩定的直流電壓，當該啟動輸入端A2未接 _ 地時，該比電壓比較電路停止運作，透過光耦合器之發送 端PC1B迴授至光耦合器之接收端pclA，控制該pWM振盪 控制單元53停止振盪，而使該直流電輸出單元52無電壓輸 出，即無法驅動LED燈管發光。 職是，本創作確能藉上述所揭露之技術，提供 一種週 然不同於習知者的設計’堪能提高整體之使用價值，又其 申請前未見於刊物或公開使用，誠已符合新型專利之要 φ 件’爰依法提出新型專利申靖。 • 惟，上述所揭露之圖式、說明，僅為本創作之實施例 而已’凡精于此項技藝者當可依據上述之說明作其他種種 之改良’而這些改變仍屬於本創作之發明精神及以下所界 定之專利範圍中。 M341159 【圖式簡單說明】 圖一係為本創作LED燈管結構之實施例外觀示意圖； 圖二係為圖一之立體分解圖； 圖三係為本創作光罩組之立體分解圖；及 圖四係為本創作交換式電源轉換電路之實施例電路示意 圖0 【主要元件符號說明】 10 前蓋 11 圓孔 20 後蓋 30 光罩組 31 圓錐殼體 32 小圓孔 33 光學件 34 透鏡蓋 35 反光鏡面 36 凹透鏡 37 凸透鏡 40 LED基板組 41 LED基板 42 LED晶兀組 43 金屬散熱籍片 13 M341159 50 交換式電源轉換電路 51 交流電輸入單元 52 直流電輸出單元 53 PWM振盪控制單元 54 迴授及過載保護單元 55 高壓保護電路 60 侧蓋 61 電接腳The LED lamp tube structure of the present invention comprises a front cover 1 〇, a back cover 2 〇, a plurality of reticle groups 30, at least one LED substrate group 40, an exchange type power conversion circuit 50, and assembled on the front cover 1 〇 The two side covers 6 are formed on the side, wherein the front cover 10 and the rear cover 20 are combined with each other to form an internal space, and the LED, the substrate group 30 and the switching power conversion circuit 40 are disposed on the front cover 1 The inside of the cymbal is housed in the internal space, and each component of the LED tube of the present invention can be easily assembled and disassembled by the user, so that the user can replace the component or repair. The front cover 10 is provided with a plurality of circular holes n extending through the front cover 10, and the photomask groups 30 are conical, assembled and fixed on the outer side of the front cover 10, and the tapered portion thereof can be embedded in the circular hole 11. As shown in FIG. 3, it is an exploded perspective view of the mask group 30. The mask group 30 is provided with a conical housing 31. The cone bottom defines a small M341159 circular hole 32. An optical member 33 is also conical. Mounted in the inside of the conical housing 31, a lens cover 34 is assembled in the opening of the conical housing 31, and the optical member 33 can be locked in the conical housing 31. The inner surface of the optical member 33 is A mirror surface 35 is provided with a concave lens 36 at the bottom. The lens cover 34 is provided with a convex lens 37. The mask group 30 first condenses the LED light source by the concave lens 36, and then reflects out through the mirror surface 35. The light reflected by the mirror surface 34 of the convex lens 37 is evenly dispersed, so that by concentrating, reflecting, and astigmatizing, the LED light source can be irradiated further, thereby effectively enhancing the brightness of the LED light source. Referring to FIG. 2 , the LED substrate assembly 40 includes an LED substrate 4 and a plurality of LED die sets 42 connected to the LED substrate 41 and a metal heat sink fin 43 . The metal heat sink fins 43 are assembled on the back surface of the LED substrate 41 for absorbing the heat energy generated by the LED chip groups 42 and then transmitted to the fins. Cooling on the chip. The LED arrays 42 connected in series are electrically connected to the switching-power conversion circuit 50. The left and right sides of the cover 60 are respectively provided with two electrical pins 61 extending through the body of the side cover 60 to electrically wire Connecting to the switching power conversion circuit 5A to receive power on a daylight lamp (not shown), the switching power conversion circuit 50 can convert the power on the daylight lamp into a stable DC power to drive the Some of the LED die sets 42 emit light. Please refer to FIG. 4, which is a circuit diagram of an embodiment of the present invention. The LED lamp of the present invention needs to be compatible with the existing daylight lamp, and the power of the existing daylight lamp is AC flashing 4〇. The high voltage above M341159 is ramped up, so it is necessary to convert the AC high voltage into a stable DC low voltage to drive the LED light. If the transformer is used directly, the transformer needs a large volume, so it cannot be installed in the LED. In the inside of the lamp, the circuit architecture of the switching power supply (Switching Power Supply) not only reduces the size of the transformer, but also improves the conversion efficiency of the power supply. The switching power conversion circuit 50 of the present invention mainly comprises an AC input unit 51, a DC output unit 52, a PWM oscillation control unit 53, and a feedback and overload protection unit 54, wherein the AC input unit 51 is electrically The power connected to the daylight lamp is mainly composed of a bridge rectifier (D1~D4), a filter LF1, a capacitor C1 and a step-down transformer T1, and is used for rectifying the high voltage of the AC flashing into a DC voltage output to the The primary side input end of the step-down transformer T1, the other coupled output end of the step-down transformer τΐ primary side is electrically connected to the PWM oscillation control unit 53 for supplying the operating voltage required by the PWM oscillation control unit 53. • The secondary side output end of the transformer T1 is controlled by the PWM oscillation control unit 53 to output a high frequency oscillation square wave, and the input end of the DC power output unit 52 is electrically connected to the secondary side output end of the transformer T1. Mainly composed of a low voltage rectifier D7, an inductor L1 and capacitors C8~C9, which are used to rectify the high frequency oscillating square wave outputted by the step-down transformer T1 into a low voltage direct current output to provide driving LED array illumination. Preferably, the low voltage direct current of the present embodiment may be 27 volts or 24 volts. The PWM oscillation control unit 53 is mainly composed of a PWM oscillator IC1, a field effect transistor Q1, and a receiving unit pciA of the optical bridge unit M341159. The field effect transistor Q1 is connected in series to the step-down transformer. The PWM oscillator IC1 receives the receiving signal of the receiving end PCIA of the optocoupler to output an oscillating signal to the field effect transistor Q1 for driving the output of the secondary side of the transformer T1. The frequency oscillation square wave 0, wherein the feedback and overload protection unit 54 is mainly composed of two sets of operational amplifier IC3, two sets of SCR arrester diodes IC2, IC4 and a transmitting end PC1B of the optical coupler, the two sets of operational amplifiers The IC3 and the two sets of SCR arrester diodes IC2 and IC4 form a voltage comparison circuit and are electrically connected to the DC output unit 52. The two sets of SCR arrester diodes IC2 and IC4 form a rated voltage in a high and a low range. For comparing whether the output of the DC output unit 51 is overloaded (below the rated voltage) or a high voltage output (beyond the rated voltage) to protect the LED array of the back end, the comparison circuit will detect when an overload occurs. Measurement and loss When the voltage is lower than the rated voltage, it is sent back to the receiving end PC1A of the optical coupler through the transmitting end PC1B of the optical coupler, and the PWM oscillation control unit 53 is controlled to stop the oscillation until the output voltage returns to the rated voltage, and the oscillation output continues to be stable. DC voltage. The DC output unit 52 of the present invention is further provided with a high voltage protection circuit 55, which is mainly composed of a Zener diode zd transistor L2 and a resistor R15. When the output of the DC output unit 52 outputs a high voltage. , will be clamped to the saturation voltage by the Zener diode ZD1, and the remaining voltage will drop on the resistor R15, and the voltage comparison circuit in the feedback and overload protection unit 54 will detect exceeding the rated voltage, and the transmitted light The transmitting end PC1B of the coupler is fed back to the receiving end PC1A of the optical coupler, and the PWM oscillation control M341159 unit 53 is controlled to stop the oscillation until the output voltage returns to the rated voltage, and continues to oscillate to output a stable DC voltage. In the circuit of the present embodiment, the feedback and overload protection unit 54 is further used as a start switch of the LED lamp, and a resistor R24 and a diode D9 are connected to the input terminal A1 of the voltage comparison circuit as a start. Input terminal A2, when the start input terminal A2 is grounded, the voltage comparison circuit is normally operated, and the PWM oscillation control unit 53 is controlled to oscillate. The DC output, the unit 52 outputs a stable DC voltage, when the start input terminal A2 is not When the ground is connected to the ground, the ratio voltage comparison circuit stops operating, and the transmitting end PC1B of the optical coupler is fed back to the receiving end pclA of the optical coupler, and the pWM oscillation control unit 53 is controlled to stop the oscillation, so that the direct current output unit 52 is not provided. The voltage output, that is, cannot drive the LED tube to emit light. The job is to create a design that is different from the well-known ones by the above-mentioned techniques. It can improve the overall use value, and it has not been seen in the publication or public use before the application. It is necessary to propose a new patent Shen Jing according to law. • However, the above-mentioned drawings and descriptions are only examples of the present creations. Those who are skilled in this art can make other improvements based on the above descriptions. These changes still belong to the inventive spirit of this creation. And in the scope of patents defined below. M341159 [Simple description of the drawing] Fig. 1 is a schematic view showing the appearance of an embodiment of the LED lamp tube structure; Fig. 2 is an exploded perspective view of Fig. 1; Fig. 3 is an exploded perspective view of the created photomask group; The four-series is the circuit diagram of the embodiment of the exchange type power conversion circuit. [Main component symbol description] 10 Front cover 11 Round hole 20 Back cover 30 Photomask group 31 Conical housing 32 Small round hole 33 Optical member 34 Lens cover 35 Reflective mirror surface 36 Concave lens 37 Convex lens 40 LED substrate group 41 LED substrate 42 LED wafer group 43 Metal heat sink 13 M341159 50 Switching power conversion circuit 51 AC input unit 52 DC output unit 53 PWM oscillation control unit 54 Feedback and overload protection Unit 55 high voltage protection circuit 60 side cover 61 electric pin