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Postcode: 22510短秒5
Postcode: 22510短秒5
The third generatio愛嗎n lighting sour家風ce, blue light LED,務議 opens up a 紅票new era of light紅業ing
abstract：LED lighting has hig訊吃h lighting efficiency, w新有hich not only meet頻刀s people's ligh雜木ting requirements, but 內信also pays atte些爸ntion to the impact of l愛有ighting methods on the筆機 environment
LED 街些lighting has hig姐白h lighting ef到校ficiency, which not o亮相nly meets pe暗市ople's lighting requirem低分ents, but also p習民ays attentio綠頻n to the imp山煙act of lighting methods 兒業on the environment and些我 human body. The main features of L朋他ED lights are我通:
1. High畫好 luminous efficienc不也y and low power consumpt就知ion. The unit of luminous eff可你iciency is g水用enerally lumens/watt.算文 The incandescent light也長 efficiency 但什is 10-15 lumens/watt, th劇煙e tungsten halogen lamp近歌 is 12-24 lumens/wa站問tt, the fluorescent lig算高ht is 50-90 lumens/wat在問t, the sodium 樹工light is 90-140 lumens/對裡watt, and the LED ligh如明t efficiency is 輛工100-200 lumens/watt, and女兒 it emits light It 姐都has good monoch做們romaticity and can dir湖如ectly emit colore請媽d visible ligh友子t. Under the same lighting 物坐effect, the power co費聽nsumption is 長服one-tenth that習金 of incandescent la月坐mps and one-half th看請at of fluorescen街場t lamps.
河司2. Low operating vo身你ltage and low pow中麗er consumption,男自 making it easy to u綠白se in areas without AC子為 mains power. The working voltage of票房 LED is low (DC笑業 2-3.6v) and onl頻動y requires a very weak 歌海current to emit 師是light normally外事. Each LED light in night技街 scene lighting only 科吃has 0.06 watts亮女, while each LED 老短street light only又厭 has 1 watt. Using local s問朋olar cells ca內這n make LED l輛影ights shine, bringing 媽議light to the 1.5 bil聽商lion people around th錢放e world who have房音 not yet benefited f鄉事rom the powe離店r grid.
3. 雜身The application is v鄉校ery flexible a但房nd can be made紅都 into light, thin an雨金d short products in va山鐘rious forms of points, 學章lines and surfaces. The control of LE樂喝D is extremely c知年onvenient. A遠員s long as the current i校著s adjusted, the制森 light intensity can be從女 adjusted at 南得will. The comb雨明inations of di資鐘fferent light co不做lors are varied, and火大 the use of timi見哥ng control circuits can的要 achieve colorful and東河 dynamic chan兒金ges.
4. Super l空頻ong life, green an有年d environment冷暗ally friendly.男務 LED is a solid子錢 cold light source, 議員small in size, 明也light in weight, no fila師空ment, no glass bubble, n紙她ot afraid of vib開厭ration, and 外東has a service life 西去of 50,000-100,000 hours.農到 There are no u來水ltraviolet and i農討nfrared rays in the 花音spectrum, the wa謝快ste is recyc藍也lable, there is n弟我o pollution, and it is門照 a typical gre海廠en lighting source.
O下身n October 7, the Ro哥自yal Swedish Academy o間校f Sciences a但放nnounced that three大他 Japanese scient水信ists, Profes票綠sor Akasaki 間化Isamu of Akas市信hi University吃對, Hiroshi Am都生ano, a professor o算在f Nagoya Univer音數sity, and Shuji頻吃 Nakamura, a Japanese-A麗我merican scientist an睡樹d professor of the相黑 University of Californi很秒a, Santa Barbar醫綠a, jointly won the 2腦器014 Nobel Prize in Phy金河sics. Academic A吧著ward in recogniti作藍on of their con鐘相tribution to overcomin很做g the blue LED prob學有lem. As the award speec制讀h says: "Incandesce黑又nt lights il銀懂luminate the 20新美th century, and LED 靜刀lights will illumi哥小nate the 21st cent冷些ury." This move will e河跳ffectively pro美醫mote the technological p秒機rogress and popularizati票小on of semico山暗nductor (LED坐為) lighting.
LED lamp is 老關the third generat黃人ion of lighting ele唱玩ctric light so人技urce
In 通湖1879, Edison 聽林heated a filament t船銀o an incandescen路線t state and u去劇sed thermal radiat你花ion to emit vi西件sible light. He藍綠 invented the in老光candescent lamp, which r些黑evolutionized t通鐵he way people illuminat從河e for the first time道哥. However, most of its吧費 electrical ene現相rgy is dissipated a暗船s heat, and only 服男a small part i拍東s converted 計行into light. The light 火哥efficiency is about和商 12 lumens/w外窗att and the li拿到fespan is about 2,000 離窗hours.
The sec家票ond generation o水影f lighting electric ligh購制t sources appeared in吃飛 the 1930s. 對這The Great Depression ca著木used the ligh又街ting industry我區 to begin to p唱土ay attention to l拿制ight efficiency. Fl下亮uorescent lamps ap大新peared, and then co術都mbined with ballasts化子, they were called 暗女energy-saving 相遠lamps. The electronic ball讀水ast heats the fila兒遠ment and emits el錢子ectrons, whic少短h collide with the 土愛argon atoms i化問n the lamp tube and船低 then collide wi化街th the mercury at上靜oms inside, causin問兵g the mercur和謝y atoms to ioniz到校e and emit ultr海河aviolet light to拍好 excite the phospho下年r to emit light. Because the te和理mperature of the filame喝兵nt of fluorescent l訊務amps is much lo醫間wer than tha頻拍t of incandescent lamps 新知when they are靜姐 working, thei少服r lifespan is more than不們 5,000 hours, 呢議and their energy conv男笑ersion efficiency i下刀s as high as more than 5森習0 lumens/wat業資t, so they sa快長ve electricity. However, because merc體窗ury has a low boil理們ing point and房信 can evaporate at room t市購emperature, 工拍broken waste lam技友ps can cause the me靜呢rcury concentrati下路on in the surrounding ai個房r to exceed t木劇he standard b公河y hundreds of t舞下imes, which wil北輛l damage the h商生uman central nerv玩嗎ous system. In山票haling 25 milligram光書s of mercury vapor at a 這請time can caus討站e death.
The th歌火ird generati說路on of lighting electri了制c light sources - LED媽西 lights that畫路 appeared in the我友 early 1990s is more ene場作rgy-saving and environ上身mentally friendly,河聽 and is the t湖他hird change i車也n the lighting industry.能購 LED is a solid-sta身知te semiconductor electr拍廠onic componen舊但t that converts 機舊electrical energy和信 directly in他音to light energy.技森 The core part of明了 the light-emit見電ting diode is a wafer金藍 composed of 要務p-type semiconductor a個弟nd n-type se友木miconductor.計海 There is a transi厭紙tion layer between t紅報he p-type sem遠就iconductor a亮歌nd n-type semico習弟nductor, called a 科工pn junction. In some semicondu爸他ctor materials,嗎森 when a reverse volt廠他age is applied to the pn小看 junction, the 愛近injected minority carr事嗎iers recombine with車得 the majority carri輛不ers, and exc樂朋ess energy is rel亮愛eased in the form o那湖f light, thereby directl外光y converting e地明lectrical energ在資y into light energy. Utilize vario器森us compound sem哥很iconductor materi們船als and chem短相ical modification meth錢書ods to adjust 場場the energy band山算 structure and b話但andgap width of 紅地the materials to des能鐘ign LEDs that em店東it different colors: g器美allium arsenide diod術街es emit red light, g學呢allium phosphide dio男地des emit green light,農數 silicon carbide The d間輛iode emits yell多劇ow light, and the 海很gallium nitride di錯章ode emits blue light. LED light source can 紙但use the principle of北書 three prima愛飛ry colors of red, g可體reen and blue. Unde習對r the control of comp線子uter technology, th微路e three colors can hav服能e 256 levels中西 of grayscale a技服nd be mixed at區了 will, which can produ朋錢ce 256×256×256 (i.e. 懂大16777216) colors 熱樹to form diff議唱erent light 微日colors. The combinat制們ion. The light color 風體of the LED combination 我器is varied and can a車用chieve colorful dynami司自c changing effec些畫ts and various images工如.
1. High畫好 luminous efficienc不也y and low power consumpt就知ion. The unit of luminous eff可你iciency is g水用enerally lumens/watt.算文 The incandescent light也長 efficiency 但什is 10-15 lumens/watt, th劇煙e tungsten halogen lamp近歌 is 12-24 lumens/wa站問tt, the fluorescent lig算高ht is 50-90 lumens/wat在問t, the sodium 樹工light is 90-140 lumens/對裡watt, and the LED ligh如明t efficiency is 輛工100-200 lumens/watt, and女兒 it emits light It 姐都has good monoch做們romaticity and can dir湖如ectly emit colore請媽d visible ligh友子t. Under the same lighting 物坐effect, the power co費聽nsumption is 長服one-tenth that習金 of incandescent la月坐mps and one-half th看請at of fluorescen街場t lamps.
河司2. Low operating vo身你ltage and low pow中麗er consumption,男自 making it easy to u綠白se in areas without AC子為 mains power. The working voltage of票房 LED is low (DC笑業 2-3.6v) and onl頻動y requires a very weak 歌海current to emit 師是light normally外事. Each LED light in night技街 scene lighting only 科吃has 0.06 watts亮女, while each LED 老短street light only又厭 has 1 watt. Using local s問朋olar cells ca內這n make LED l輛影ights shine, bringing 媽議light to the 1.5 bil聽商lion people around th錢放e world who have房音 not yet benefited f鄉事rom the powe離店r grid.
3. 雜身The application is v鄉校ery flexible a但房nd can be made紅都 into light, thin an雨金d short products in va山鐘rious forms of points, 學章lines and surfaces. The control of LE樂喝D is extremely c知年onvenient. A遠員s long as the current i校著s adjusted, the制森 light intensity can be從女 adjusted at 南得will. The comb雨明inations of di資鐘fferent light co不做lors are varied, and火大 the use of timi見哥ng control circuits can的要 achieve colorful and東河 dynamic chan兒金ges.
4. Super l空頻ong life, green an有年d environment冷暗ally friendly.男務 LED is a solid子錢 cold light source, 議員small in size, 明也light in weight, no fila師空ment, no glass bubble, n紙她ot afraid of vib開厭ration, and 外東has a service life 西去of 50,000-100,000 hours.農到 There are no u來水ltraviolet and i農討nfrared rays in the 花音spectrum, the wa謝快ste is recyc藍也lable, there is n弟我o pollution, and it is門照 a typical gre海廠en lighting source.
O下身n October 7, the Ro哥自yal Swedish Academy o間校f Sciences a但放nnounced that three大他 Japanese scient水信ists, Profes票綠sor Akasaki 間化Isamu of Akas市信hi University吃對, Hiroshi Am都生ano, a professor o算在f Nagoya Univer音數sity, and Shuji頻吃 Nakamura, a Japanese-A麗我merican scientist an睡樹d professor of the相黑 University of Californi很秒a, Santa Barbar醫綠a, jointly won the 2腦器014 Nobel Prize in Phy金河sics. Academic A吧著ward in recogniti作藍on of their con鐘相tribution to overcomin很做g the blue LED prob學有lem. As the award speec制讀h says: "Incandesce黑又nt lights il銀懂luminate the 20新美th century, and LED 靜刀lights will illumi哥小nate the 21st cent冷些ury." This move will e河跳ffectively pro美醫mote the technological p秒機rogress and popularizati票小on of semico山暗nductor (LED坐為) lighting.
LED lamp is 老關the third generat黃人ion of lighting ele唱玩ctric light so人技urce
In 通湖1879, Edison 聽林heated a filament t船銀o an incandescen路線t state and u去劇sed thermal radiat你花ion to emit vi西件sible light. He藍綠 invented the in老光candescent lamp, which r些黑evolutionized t通鐵he way people illuminat從河e for the first time道哥. However, most of its吧費 electrical ene現相rgy is dissipated a暗船s heat, and only 服男a small part i拍東s converted 計行into light. The light 火哥efficiency is about和商 12 lumens/w外窗att and the li拿到fespan is about 2,000 離窗hours.
The sec家票ond generation o水影f lighting electric ligh購制t sources appeared in吃飛 the 1930s. 對這The Great Depression ca著木used the ligh又街ting industry我區 to begin to p唱土ay attention to l拿制ight efficiency. Fl下亮uorescent lamps ap大新peared, and then co術都mbined with ballasts化子, they were called 暗女energy-saving 相遠lamps. The electronic ball讀水ast heats the fila兒遠ment and emits el錢子ectrons, whic少短h collide with the 土愛argon atoms i化問n the lamp tube and船低 then collide wi化街th the mercury at上靜oms inside, causin問兵g the mercur和謝y atoms to ioniz到校e and emit ultr海河aviolet light to拍好 excite the phospho下年r to emit light. Because the te和理mperature of the filame喝兵nt of fluorescent l訊務amps is much lo醫間wer than tha頻拍t of incandescent lamps 新知when they are靜姐 working, thei少服r lifespan is more than不們 5,000 hours, 呢議and their energy conv男笑ersion efficiency i下刀s as high as more than 5森習0 lumens/wat業資t, so they sa快長ve electricity. However, because merc體窗ury has a low boil理們ing point and房信 can evaporate at room t市購emperature, 工拍broken waste lam技友ps can cause the me靜呢rcury concentrati下路on in the surrounding ai個房r to exceed t木劇he standard b公河y hundreds of t舞下imes, which wil北輛l damage the h商生uman central nerv玩嗎ous system. In山票haling 25 milligram光書s of mercury vapor at a 這請time can caus討站e death.
The th歌火ird generati說路on of lighting electri了制c light sources - LED媽西 lights that畫路 appeared in the我友 early 1990s is more ene場作rgy-saving and environ上身mentally friendly,河聽 and is the t湖他hird change i車也n the lighting industry.能購 LED is a solid-sta身知te semiconductor electr拍廠onic componen舊但t that converts 機舊electrical energy和信 directly in他音to light energy.技森 The core part of明了 the light-emit見電ting diode is a wafer金藍 composed of 要務p-type semiconductor a個弟nd n-type se友木miconductor.計海 There is a transi厭紙tion layer between t紅報he p-type sem遠就iconductor a亮歌nd n-type semico習弟nductor, called a 科工pn junction. In some semicondu爸他ctor materials,嗎森 when a reverse volt廠他age is applied to the pn小看 junction, the 愛近injected minority carr事嗎iers recombine with車得 the majority carri輛不ers, and exc樂朋ess energy is rel亮愛eased in the form o那湖f light, thereby directl外光y converting e地明lectrical energ在資y into light energy. Utilize vario器森us compound sem哥很iconductor materi們船als and chem短相ical modification meth錢書ods to adjust 場場the energy band山算 structure and b話但andgap width of 紅地the materials to des能鐘ign LEDs that em店東it different colors: g器美allium arsenide diod術街es emit red light, g學呢allium phosphide dio男地des emit green light,農數 silicon carbide The d間輛iode emits yell多劇ow light, and the 海很gallium nitride di錯章ode emits blue light. LED light source can 紙但use the principle of北書 three prima愛飛ry colors of red, g可體reen and blue. Unde習對r the control of comp線子uter technology, th微路e three colors can hav服能e 256 levels中西 of grayscale a技服nd be mixed at區了 will, which can produ朋錢ce 256×256×256 (i.e. 懂大16777216) colors 熱樹to form diff議唱erent light 微日colors. The combinat制們ion. The light color 風體of the LED combination 我器is varied and can a車用chieve colorful dynami司自c changing effec些畫ts and various images工如.
