The LED technique standard and examination method study

The LED illuminate the tool to be constitute by the light source of LED, the electric appliances enclosure and tool.It adopts the machine piece that semi-conductor give out light to be the light source, having the physical volume small, the life span is long and can consume low, start in a moment, color abundant etc. characteristics, is a kind of cold light source of environmental protection economy energy.

In recent years, etc. of the United States, Japan, and Europe flourishing nation and governments organization gives out light a great deal of manpower, the material resources organization of the aspect devotion in the LED development and research, make the technique level of the light source of LED have the significant exaltation, the power have already come to a 3-5 Ｗs, giving out light the efficiency to attain 301 ｍs/ ｗs, making the light source of LED used for the common lighting to make possible.

The product of LED will become the latest economy energy lighting product.But the LED illuminate the tool is a high technique, high additional value product, our country before to the research that LED illuminate still very weak, differ with foreign level very greatly, especially at applied the research of foundation can't still satisfy our country the need that industry development.
Illuminate the standard aspect of the product examination technique and products and can't adapt the request of the our country LED lighting industry development far and far in the LED. The development that the our country LED illuminate, should build up the product of the different from soundly our country LED lighting tool of technique standard and test method evaluation system, existing examination system of norm, make business enterprise to examine according to the united test method first, only thus then can real understanding our country the LED illuminates the technique level of the product, then pushing our country the LED illuminate industry of technique progress, promote profession develop.

The LED illuminates the establishment of the tool technique standard and the test method, also will promote technical progress of semi-conductor, illuminate the production of the product and the exaltation of the quantities to the LED, shorten the margin of my state-to-state 际 level, have realistic meaning and profound history meanings of very importance, will produce the huge economic performance and social performances.

Illuminate international lighting committee( CIE) and international electrician's committees( IEC)s of technical present condition of the LED standard and examinationses didn't concerning illuminate the LED standard.
Only in 90's in last century, the CIE has ever announced a general LED to test the technique report of method.But is quick in recent years because of the technique development of the product of LED, LED many technique characteristics discover now are all past don't in consideration of. Therefore, on the annual convention of IED that Japanese Kyoto of 1999 hold, the flourishing nation representative for attend meeting suggests to be drawn up the white light LED by the ICETC34( illuminate the technique committee) to illuminate the tool standard, the Japanese delegation still hands over to illuminate two standard drafted plans of use the white light LEDs generally.Illuminate the LED for the sake of the development, flourishing nations all value the LED test method and the research of the standards very much.For example the ASCII examination graduate school( NIST) is the test think factory of the 著 in a world, they organize the research that the international well-known test expert opens the exhibition LED test currently, the point research LED gives out light the test methods, such as characteristic, the temperature characteristic and the light 衰 characteristic...etc., trying the LED test method and the technique standards of build up the whole sets, testing in the LED the aspect have already walk at world of ex- row.Japan established" the white light LED test research committee", the specialized research illuminates the test method and technique standards of use the white light LEDs.Flourishing nation in world for robbing to have the LED to study of make a little bit high, all threw in a great deal of manpower material resources in the LED standard and the test aspectses, pay attention to the choice LED characteristic parameter and the test method researches in the standard aspect.The our country has no LED currently lighting tool standard, the LED that also did not correspond illuminates to examine the system.Some business enterprises bought the part examination equipments.But because of want for profession of research, examine the level is low, the instrument kit bad, examine the accuracy is low, the mutual can't compare to, test the item and can't meet the demands.Although the profession examination organization of the our country also once opens the research work of some LED of the exhibition test, because of condition limit, can't become the examination evaluation system of the integrity still, its level and abroad there is still bigger margin in flourishing nation.

Currently the relevant examination section of our country hases already begin to open the research that the exhibition lighting LED tests the method, including the development work of examine the equipments.The lighting electric appliances of the whole country standardizes the technique standard and the test method standards that the technique committee have already will illuminate the LED to be included in the standard work plan of 2004, hoping to pass the establishment of illuminate the standard of LED, promote technical development of LED and at illuminate the application of the realm.

Need the problem for resolve

Illuminate the LED technique standard emphasizes to resolve the characteristic of the product and the problem of the test methods, the most important function index sign in LED is optical characteristic and electricity characteristics.The optical characteristic includes the light flux, light to distribute, the bright degree, spectrum distribute, the color degree sits the mark and shows color index number etc..

The LED apply in illuminate the tool, on the optics the total of the current general light source likeness, and then have it special sex of the product:LED for a kind of give out light the machine piece directively;The luminary is very small, can look like some light source;Give out light to be subjected to the environment and process the craft influence to compare greatly.
The diagraph period of the LED light characteristic is very long.( around ten thousand even several ten thousand hours)The LED still has it the safe characteristic of the characteristic( include to economize on energy an electric appliances enclosure), machine characteristic, the temperature characteristic and tools of the electric appliances enclosure etc. outside illuminate the usage in in addition to involving the optical function.

Therefore in standard of establishment process the important step is heavy to consider the problem of test the method
First is the choice adoption and research to manufacture to match the characteristic of LED of test equipment, the establishment test system.Include:The LED optics tests dependable sex of the system, the temperature supervision test system, electric appliances test system, environment test system, durable test system etc..Among them mainly testing system should adopt the international advanced means, at test the method and should have access to the international advanced level.

Pass with the cooperation exchanges of the foreign laboratory, make the LED examination technique and international developments of the our country synchronous, make standard since ability the objective reflection our country illuminate the LED technique level, in accordance with the our country the lighting the LED fast development went with should, again and the international level keep, further promoting the technical development of LED.

Illuminate the LED standard is a series standard
The foundation standard( or lord standard) within the series standard is the list tube LED to illuminate the standard and test the method standard, the formation illuminates LED standard system on this foundation.The LED standard wants to solve the light source of LED to request in the characteristic in the lighting first, the technique request of the assurance LED light source, and pass main technique characteristic and the technique parameters that looks for the LED to the LED examination, make sure that the our country illuminates the LED technique level and related technique index signs and technique requestses.

Because illuminating the LED technique development very quick, illuminate the establishment of the LED standard and should went with technical development and the demand of the markets should.Standardize the organization, the examination organization, illuminate the LED research department and produce the business enterprise and apply the unit, etc. should match with mutually, joint effort, build up a set of national standard that matches the our country state of the nation, technique forerunner's lighting LED.