LED standard: From show to semiconductor illume is advanced
In some the LED outdoor (semiconductor glow diode) of indication screen Grow Lighting checking and accept, check and accept by what the regulation undertakes finished major content, enter decisive finally order — indication effect evaluation. Owner unit is led and the eye of relevant expert arrived centrally on the TV content that screen broadcasts, a short while, enter discuss: “Screen brightness appears insufficient, color is not quite bright beautiful. ” have expert say. “Font is unsharpness, look a little ambiguous. ” have expert speech again. “I feel screen appearance is insufficient level off, do a few places seem to still lack color? ” somebody raises question. “The contract stipulates screen broadcasts the effect to be able to achieve TV result, big screen is actual the effect is further than TV effect difference! ” the sound with excited owner lets spot atmosphere become nervous all the more. Project bear build square technical personnel collect to be together, one discuss and after the technology is operated, basis bear build square proposal demand, check and accept personnel to stand to screen the distance with certain ahead, the screen that opens afresh begins to broadcast new round of program. What broadcast above all is video cartoon, the picture color that big screen place shows is dazzing, font is very clear also; Follow the video program that broadcast, bai Yun, green grass is blue, bright-coloured flower gives out gorgeous glorious. The project is checked and accept pass smoothly! System of traffic of 4 intelligence of vice-president of branch of indication application of LED of guild of Chinese optical photoelectron, Beijing is compositive when Guan Jizhen of limited company general manager is accepting a reporter to interview, told about above story. Guan Jizhen emphasizes, afore-mentioned scenes, show applied project project in LED in checking and accept not rarely seen. In recent years, as LED indication application product uses the amplification of the domain, the checks and accept occurrence demur to litigate even circumstance of product, project also is heard from time to tome. One of crucial point of the problem depend on the difference that knows on pair of product function and quality. From inside the message that indication application begins to be gotten in human place, it is the biggest that the watchs earning to arrive information place that passes person key point holds proportion. But the complexity that forms as a result of effect of human vision sense, feel the indication product of information to providing person look, its standardize a problem to become very complex. According to Chinese optics Peng Mohua of secretary-general of branch of parts of an apparatus of photoelectron guild photoelectricity introduces, the main technique of LED and industrial development are very rapid in last few years, its apply a face to also expand ceaselessly, from the earliest also be to apply the most extensive LED to display screen to at present hotter and hotter semiconductor illume, its product breed is various, must have relevant technical standard and product level. Be in especially semiconductor illume domain, at present domestic and international relevant organization all is being organized actively and establish standard of semiconductor lighting engineering, also encounter many problems, but the growth as market demand, accelerate establish standard of semiconductor lighting engineering already extremely urgent. Application of big batch production is driven and affecting product level make. LED shows screen is a clearer case. Before 1995, the representative product LED that shows application as LED shows screen development is rapid, but the production that LED indicates screen at that time can be depended on without industry standard and standard. Ministries and commissions of former 1996 electron holds Beijing La Tong company in the palm to make ” LED indication screen is general and normative ” , in January 1998, ” LED indication screen is general and normative ” release formally as electronic occupation standard carry out, make LED shows screen industry standardizes the job to begin to move toward a standard. At the beginning of 1998, branch of parts of an apparatus of Chinese Guang Xieguang report established LED formally to show screen major committee, after guild holds water, in lead normative industry development, begin photoelectricity parts of an apparatus and LED to show screen product technology and check mark allow communication to coordinate wait for a respect to begin the work actively. LED parts of an apparatus and applied seminar were held in Kunming 1999, entrusted company of general of Nanjing the name of a river in Shaanxi and Henan provinces to draft ” LED shows screen detects method ” , after constituent discussion is revised, at formal in August 2000 print and distribute, try out of unit of member of screen major committee shows in LED. 2003, after editing ” LED indication screen is general and normative ” and ” LED shows screen checks a method ” the occupation standard that serves as MII is released formally. In the meantime, the industry such as sports, traffic, railroad also issued the specialized standard of a series of industry application in succession. The LED that gives off light actively shows applied product gets applied extensively in a lot of domains, it is one of significant measures that modern society is released and provide information. Guan Jizhen emphasizes, show the level that uses a product to LED, actually industry pays close attention to quite all the time and take seriously, accompany industrial development, from do not have have, in also developing ceaselessly and be being perfected. The result that LED shows and applied environment and demand height are relevant, the immediate decision such as material of parts of an apparatus, perspective, apparent distance, lattice shows the stand or fall of the effect, the program content that broadcasts also has immediate effect to showing the result. In what did not make clear the technology is limitted and standard condition falls, very difficult objective evaluation shows the result. The dependability standard of LED tells also be special key to application. Man of vise general manager of limited company of wisdom source photoelectron becomes long report of vice-president of branch of parts of an apparatus of schism of Chinese semiconductor guild, Beijing when grand is accepting a reporter to interview, say: “I suggest to reach the appeal for many times in all sorts of circumstances, build system of standard of dependability of our country LED as soon as possible. 2001, the applied condition that we meet LED of survey of department of tubal bureau scientific research to go up in traffic light to Beijing, the researcher that recieves us is pointing to the traffic light that places on housetop to say to us, this was last year the traffic light sample that some enterprise delivers south. Be less than a year of time, do you still look reach color? Look at that indistinct red turquoise, we do not know to say what is good really. Very much now business is imprinting in vain obviously on his LED manual life 100 thousand hours, what is the experimental basis that does not know this 100 thousand hours really? And we understand, the 5 made of baked clay high-power that to the United States some enterprise bought them 2005 parts of an apparatus of Bai Guang LED, this enterprise can tell an user explicitly, the life of this product is 3000 hours. I know, this is them from much test data come and bear the blame ground tells a client, otherwise, they have the possibility that faces compensation of a huge sum. ” to showing application, ding Chenglong told a such stories to the reporter: “At the beginning of 2004, we go to Beijing their LED parts of an apparatus uses survey of industry of some famous LED big screen circumstance. They say they are big the La Luguang LED on screen, use Japanese day only inferior parts of an apparatus. The reason is day inferior pipe does not love bad, and the pipe of other company loves bad. Pardonable day inferior pipe sells expensively it is good to return market, wanting also is, big screen of a LED, use tens of thousands of, parts of an apparatus of hundred thousands of LED, soldering, assemble, debug, in the process of joining together, installation, which link parts of an apparatus damages, it is very impracticable thing. What is more,the rather that big screen is put after reaching the designated position, have parts of an apparatus of a few LED bad, how do you do? So would rather parts of an apparatus is some more expensive, also compare from the back bad it do not know how to do is good to do not know how to do. ” issue of a dependability is involved inside this actually. The dependability of LED is the user is when use LED, should have the property that reliable, durable, life damages longly, not easily. LED is the main branch of semiconductor schism parts of an apparatus, leakage of electricity of knot of the P-N after it cannot leave some of semiconductor device solid to be afraid of hot, temperature rise increases, power base change, function degrades (brightness is reduced) and even cause permanent loss (glow efficiency drops) till the malady of attaint. So, raise LED extension piece inside quanta efficiency, raise LED extension piece the extraction with chip is smooth (the quanta outside also having person) efficiency, although get the electric energy that inputs LED as far as possible light energy of much ground translate into is not heat energy, reduce the temperature rise of LED thereby, and come loose goodly hot should perforative at LED extension piece, chip, enclose and even all link of application, it is the basic measure that raises LED dependability. The energy-saving lamp of our country, inside very long period, experiencing province report not the state of be economical. LED can take the old road of energy-saving lamp, the key depends on us whether the dependability series standard that establishs our country LED quickly, try to be carried out strictly carry out. Apply product standard to LED, hangzhou short for Zhejiang Province is big trichromatic Mou Tongsheng of president of instrument limited company introduces, product level field uses in LED, the relevant ministries and commissions such as federation of association of industry of machinery of MII, the Ministry of Communication, coal, light industry, in the standard that involves LED is being made, if miner’s lamp uses communication of road of LED illuminant, LED revulsive and alterable mark (already finished) etc. According to current LED technology level and function, LED basically is centered in signal lamp of indicator light, traffic, indication screen, mobile phone to be in a poor light source, landscape decorates the application such as illume, local lighting to go up, be in a poor light apparent applied tendency already was shown in source and the common illume such as the lamp that cast light, street lamp in LCD at present. Accordingly, the brigadier of applied product mark that makes LED is in the near future the key works. Advancing semiconductor illume to semiconductor illume basically is to point to illume of glow diode LED, with glow of traditional incandescent lamp tungsten filament and energy-saving lamp 3 base lubricious pink glow is distinct, because use electric field irradiation, efficiency of changeover of light produced by electricity is tall, because of this specific power consumption little, heat radiation efficiency of low, glow is tall, it is a kind of energy-saving, environmental protection, economy, safe new-style illume parts of an apparatus. According to foreign data, the semiconductor illume below coequal brightness, it is the 1/10 of incandescent lamp power comsumption only, life can amount to 100 thousand hours however, it is 100 times of incandescent lamp. As a result of world energy resources and environmental protection problem increasingly outstanding, make semiconductor illume also becomes the heat that the industry pays close attention to. Liang Bingwen of general manager of company of data of photoelectricity of Shanghai blue treasure emphasizes when accepting a reporter to interview, from 2003, since the country starts semiconductor illume project, semiconductor illume industry is in fast growing phase at present. Of system of illume LED standard build, it is the safeguard that health of semiconductor illume industry develops. MII had started relative standard 2005 make the work. Mou Tongsheng says, in last few years the development as semiconductor lighting engineering, LED standard of home basically is in charge of making by working group of level of MII semiconductor lighting engineering. In November 2005, be in charge of a branch as semiconductor device industry, MII established working group of level of semiconductor lighting engineering, this level working group consults the means of working group of level of IEC international technology, take freewill, fair form, induct what the relevant expert of industrial group, college and research organization participates in LED standard to make. Up to now, already finished ” semiconductor glow diode checks a method ” , ” LED shows screen checks a method ” , ” blank of power glow diode is detailed and normative ” etc. On November 7, 2003, on May 17, 2004, November 16, 2005 is a few Liang Bingwen’s impressive days. On November 7, 2003, project of national semiconductor illume tackles key problem project government office held system of semiconductor illume standard to build first time symposium in capital organization. Project of national semiconductor illume tackles key problem project government office introduced at present domestic foreign minister closes research case, the top layer such as the construction content that offerred system of standard of illume of our country semiconductor and constituent frame is designed. Frame is built to go up in system of semiconductor illume standard, basically include semiconductor illume metric base standard (basic evaluation checks a method) , test of illume of standard of semiconductor lighting engineering, semiconductor evaluates a system 3 big content. Project of national semiconductor illume tackled key problem on May 17, 2004 project government office is organized again held ” system of semiconductor illume standard is built ” the 2nd symposium, expert discussion agrees with project of national semiconductor illume consistently to tackle key problem the system of semiconductor illume standard that project government office offers includes metric base standard, power extension piece reach diode of chip technology standard, glow to check product of standard, application to check standard, test to evaluate system and platform to build 5 parts. Experts attending the meeting think, outside needing the development according to product and market to be made in time except standard of applied product test, other 4 parts are the key content that at present standard system builds, especially metric base standard, need to be made as soon as possible. On November 16, 2005 this day, held working group of level of MII semiconductor lighting engineering to establish plenary session, held the plenary meeting of member of first time working group after holding water subsequently, of special responsible relative standard make. This level working group adopts open mode principle to establish, home is produced, learn, grind, with enterprise or business place of courtyard of unit, scientific research and universities and colleges all can attend. The member that at present this job is comprised many 40, the chip that covered industrial catenary to go up is made, parts of an apparatus is enclosed, fluorescent material preparation and applied product create the unit that waits for each respect. The research of the standard of the respect such as experiment of term of the test method that organizes the material in developing chain of semiconductor illume industry, chip, diode and module, term, symbol, dependability and relevant product standard is made, and the work out of technical standard system works. Had drafted at present ” blank of diode of glow of power of semiconductor photoelectron parts of an apparatus is detailed and normative ” (the newspaper approves draft) , ” semiconductor glow diode checks a method ” (publication draft) and ” standard of technology of chip of diode of power semiconductor glow ” (draft) 3 occupation standard, finished ” system of standard of semiconductor lighting engineering studies ” task task. Held in July 2006 ” working group of level of semiconductor lighting engineering ” on member congress, put forward again new research of round standard of semiconductor lighting engineering and make an item, and at of the same age the middle ten days of a month will hold project symposium in Xiamen in November. Mou Tongsheng says, new standard makes a project include chip of diode of glow of semiconductor illume term and definition, semiconductor to check blank of diode of glow of method, small-power diode of glow of detailed standard, semiconductor uses fluorescent material, semiconductor glow diode list of product items, nitrogen changes gallium radical glow diode uses sapphirine line negative, , began 4 levels that have important sense to study a project at the same time, include illuminative of method of life test of diode of glow of system of semiconductor illume standard, semiconductor, semiconductor can security of radiate of diode of effect sex, glow. Notable is, the research project of these 4 standards, it is the standard job that gets attention fully in the world, the level that Japan, United States and Europe have corresponding orgnaization to develop this field considers to work. The Japanese LED standardization that finishs recently studies the report is medium, also the experiment method LED life, can effect sex evaluation and LED ray radiation regard a key as content to the security evaluation of human body. Facing up to problem standard is harmonious child. Technical content is high, do force of time-consuming bad news, our country is in at present of semiconductor illume standard make a respect still facing a lot of problems and challenge, metric system is decided and edit especially speed does not follow to appear on the market the problem such as the harmony of a development, new standard and original standard and form a complete set should cause attention. Liang Bingwen thinks, in the past, often be a technology after maturity, the product has appeared on the market, relative standard just begins to make, use normative market. But, as technical progress, the pace that technical research and development and product appear on the market is accelerated, technical metric system decides time to also shift to an earlier date greatly, especially for the semiconductor illume industry to rapid development, speed is very crucial. Our country already showed for photoelectron the LED of parts of an apparatus established a few standards, but the progress as new material technology, apply the amplification of the domain, a few more original the technical content in the standard is relatively backward, must update. To the harmony of new standard and original standard and problem of form a complete set, liang Bingwen thinks, show parts of an apparatus as common LED, standard system of home is built already basically according to the standard system of IEC, this is the foundation of system of standard of semiconductor lighting engineering. But the LED that uses as a result of illume has his apparent technology characteristic, how to bring into the technical content that illume standard involves in original system, it is very crucial. At the same time LED illuminant replaces traditional light source, how to apply the chime of standard system form a complete set of the product to move with original and conventional lighting, will be a serious problem. Lead without bibcock enterprise, also be the reporter hears a maximum sentence in interview. Normally the circumstance falls, product standard is by the market and the dominant of bibcock company place that have technical speech right. Because be in China of semiconductor illume domain to still do not have such a few enterprises group exist, so of the standard make can rely on administration department to advance only. And do efficiency is lowly so, resource force of dominant of finite, lack, needs time is particularly long, there also is very great authority after metric system is decided even. Current, consumer takes the standard seriously not quite also is a problem that nots allow to ignore. Liang Bingwen thinks, chinese consumer pays attention to the price morely only and pay attention to quality, brand and credit not quite. Do not satisfy standard product, the market is very big still. Such to the standard make for lacked due dear sex and stature. Peng Mohua of secretary-general of branch of parts of an apparatus of photoelectricity of guild of Chinese optical photoelectron thinks, of standard of semiconductor lighting engineering make lag develop at market demand. LED basic standard, method standard and standard of product of LED parts of an apparatus and standard of raw material of main form a complete set before was not being made, begin what LED applies product standard very hard to make, especially of standard of semiconductor illume product make. “The breed of LED application product is various, applied circumstance and requirement all differ somewhat, below the circumstance that does not have standard norms, expenses of meeting occurrence development adaptability of tall, product is very poor, inaccessible the state of effective demand, be in especially side of LED illume product, must want issue of the security of the consideration, smooth pollution and environmental protection. Additional, below the circumstance that still does not have a standard in LED application product, do not carry quality assessment, the price difference of the product on the market is very big, quality is very poor, affect the reputation of LED product, cause undesirable effect socially. ” Peng Mohua says not without anxious ground. Domestic mark makes the big environment that cannot leave the whole world definitely. “Will look at present, abroad begins the certain basic standard of standard of semiconductor lighting engineering, method standard to wait to make and study besides relevant incorporation beyond, still company of relevant a few big groups is establishing standard of product of certain semiconductor illume and specifications standard, they are the product with oneself is a basis, think forestall the market of this product, this kind of challenge should cause height to take seriously. ” Peng Mohua emphasizes. Chun Lin of Pang of adviser of limited company of adviser of science and technology of Nuo of TIC favorite moral character also thinks, although market of illume of our country semiconductor is huge, preliminary already formed chain of semiconductor illume industry, but as advanced as international country and area photograph are compared, still put in many problems. “Little, product and craft compare core skill low, research and development staff are dispersive, the standard with sophisticated technology of tall to making content of a few technologies, product, can have certain difficulty; Many enterprises still are in do poineering work during accumulating, dimensions actual strength of small, capital is not strong, the heavy visual range that works to the standard is spent insufficient, the capability that participates in metric system to decide is not strong also. Because semiconductor illume is a drag in,go up, medium, downstream complex industry, of its standard make, concern with upriver material not only, downstream illume function is crucial also at the same time. The trade that its involve, enterprise and director branch are much, the problem that because this needs,be coordinated and solves is very much also. ” Pang Chunlin thinks. Receive a challenge how to be answered overcome afore-mentioned problems, meet the challenge that comes from the whole world, all circles expert also gave out numerous proposal. Peng Mohua thinks, because LED uses a product, use wide, variety much, according to the development of market demand, should accelerate establish standard of semiconductor lighting engineering. Director branch should be opposite the country to make the section that concern, Organization for Standardization, association wait with standard of semiconductor lighting engineering undertake unity harmony, make overall plans, cooperate with division of labour, cannot duplicate again calm, wasteful resource and energy. “Strengthen the main basic research that establishs relative standard to work. Good to make standard, must want to have a few main basic research. What quicken factor like what LED life checks is affirmatory, LED illuminative optics, colorimetry checks medium vision, the technical condition such as colour rendering, luminous intensity distribution is waited a moment surely really, cannot have relative standard otherwise make. Additional, answer to begin the research that concerns standard of semiconductor lighting engineering to abroad actively, want to have special orgnaization organization, have the special research of this project, make relative standard put forward basis and reference to our country, put forward how to concern orgnaization collaboration to establish relative standard with abroad, prevent forestall, make uniform policy, conform with international standard as early as possible. ” Peng Mohua suggests. Liang Bingwen thinks, metric system wants market of close together joint surely, at present semiconductor illume shines in special type illume, landscape change and the applied feed rate of road illume domain is very rapid, but because lack a standard, cause market disorder, the product is shoddy, the phenomenon of consumer of exaggerated life misdirect is quite serious, show level to should make semiconductor illume landscape shine as soon as possible the standard that turns a few kinds of main products, prevent an industry to had been not done make strong case greatly, had been done random. “The standard cannot go after one pace overly to reach the designated position: At present semiconductor lighting engineering still is in rapid development phase, technology and craft still do not have stability, technology and product still are put in very big uncertainty. Accordingly, in the procedure that establishs a standard, cannot go after one pace one-sidedly to reach the designated position, establish a standard that suits to show level to develop a condition first, update ceaselessly as technical development again next. ” Liang Bingwen suggests. Additional, it is very important to build the standard system that accords with Chinese national condition. The standard of a lot of hi-tech domains of domestic is to consult Euramerican the standard that waits for a developed country, some standards are the standard system that uses Euramerican country directly, to domestic industry development brought huge to damage, the field uses in semiconductor illume, china starts at the same time with abroad almost, the system of semiconductor illume standard that can integrate ethical characteristic of China and national condition completely to make him China, develop at the health of domestic industry with benefit. From last centuries since 90 time, the day, beautiful, Europe strategy industry that regards a country as semiconductor illume industry, a few big lead companies applied for a large number of core to invent patent, form patent network through patent across accredit, the industry of Chinese semiconductor illume that gives rapid development installed very big obstacle. According to current trend progress continues, be in in the near future inside, company of domestic semiconductor lighting will be faced with patent lawsuit to pester a body. Increase of competition ability gradually as Chinese enterprise, international competition is progressively aggravate, intellectual property and occupation standard become competitive heat, lead company tries to be mixed through setting patent camp make occupation standard dominate the market, vantage ground is held in competition. China special now be necessary to have a standard through making plan of product of illume of conductor of relative standard half-and-half and project, make relevant mark brigadier give illume Shi Shuli’s new milepost, apace develops standard of industry of stimulative LED illume, lead an industry by without foreword, turn into without standard reference conditions orderly, standard land enters the market. The development that builds system of system, perfect semiconductor illume standard to will conduce to industry of illume of semiconductor of stimulative our country at the same time and technology innovate, realize the superior bad discard of the enterprise. The construction of system of semiconductor illume standard is government, guild and the focus that the enterprise pays close attention to all the time. Shine in landscape especially change and road illume uses a field, of the standard publish will normative market, prevent a few enterprises to undertake for cost with sacrificial quality malign price competes. The LED product with LED technology inchoate standard is linked related, because brightness is inferior, make only show, the directive is used, in system of our country standard, the GB/T4589.1-1989 of standard carrying a layer on the head that is subject to system of semiconductor device standard ” parts of an apparatus of semiconductor device schism and integrated circuit general specification ” , cent is its general specification: Integrated circuit and schism parts of an apparatus, photoelectron parts of an apparatus; Be subject to GB/T12565-1990 ” cent of parts of an apparatus of semiconductor device photoelectron is normative ” basic standard has term, rating and method of characteristic, test and machine / environmental experiment method, having content of one share level among them is LED or LED product adoptable. As the breakthrough on LED technology, the tall brightness LED that appears ceaselessly, Laguang and module of Bai Guang LED, power LED and LED, the technical standard of inchoate LED is far cannot satisfy a requirement, develop the semiconductor illume product that rise in recent years especially, need to establish product standard afresh more. Nearly two years the relevant ministries and commissions such as ministry of science and technology, MII all is in what urge LED relative standard actively to make the work. Origin: Chinese electron newspaper