How does the SMD LED break the game and maintain its position in the light quality "arena"
the concept of light quality has been a common topic in the LED industry. In the past, led pursued the concept of "light efficiency first", and the popular point is that it is best to blind your eyes. At that time, if you were an LED salesman to promote your own products, you must talk about how high the light efficiency of your own products is, and your competitors also talk about light efficiency. The concept of light quality has been a common topic in the LED industry. In the past, led pursues the concept of light efficiency first, and the popular point is that it is best to blind your eyes. At that time, if you were an LED salesman to promote your own products, you must talk about how high the light efficiency of your own products is, and your competitors also talk about light efficiency
as a senior patient with supreme light efficiency, who recommended lamp beads to me in the past, I have to ask you how much the light efficiency of this product is. However, with the substantial improvement of light efficiency, the assessment of LED is no longer a light efficiency, but to light quality
light quality and light effect can be said to be inclusive. Light quality is a complex, light effect is a monomer, light quality includes light effect, and light effect is only one of the factors it considers, in fact, there are color temperature, finger, air tightness, consistency and light spot
find a balance in the paradox of the pursuit of quality
according to the collection and collation of (4) belt and tension data, the LED luminous efficiency has increased rapidly in recent years, and has reached a high level, which also means that the period of using luminous efficiency as a competitive advantage has passed, and the relative led examination has entered the period of optical quality assessment
the level of light quality shows that it can truly restore substances "The workshop is my 'battlefield' body color and the authenticity of the performance object. The light quality parameter is an index to measure the quality of the light source, and the factors that affect the light quality are mainly color temperature, color rendering index, color consistency, etc.
at present, the main factor to assess the light quality is the display index. At present, enterprises usually start to improve the display index of LED light sources from phosphor, but the light efficiency and display index are a paradox, which can be improved by increasing the wavelength of red powder However, the brightness will decline, so at present, high-quality LED products are seeking a balance between light efficiency and finger display. However, in the actual test of led enterprises, it is found that the explicit finger RA is not positively related to the light quality. According to Yin Hui, deputy general manager of Shengpu optoelectronics and executive general manager of the packaging business department, at the 2017 chief consulting market analysis meeting (Shanghai Station) jointly organized by ledinside and cnled (the former Chinese LED) of Jibang consulting, CRI was proposed based on the light source of blackbody radiation continuous emission spectrum. For the steep spectral waveform, In terms of the spectrum with narrow frequency band, it may cause problems. In the actual test, it is found that sometimes the LED with low color rendering index will have more perfect color rendering than the LED with high color rendering index. Compared with the high and low RA, the most critical is the R9 value
the rise of light efficiency is weak, and the continuous pursuit of high light quality
in addition to the visible light effect, the LED light quality also has the consistency of color temperature, that is, the color difference between light sources, that is, the color zone drift, which has always been a problem of LEDs. As for the problem of light color consistency, many of them have been ignored in the pursuit of light efficiency transition, and now light color consistency has become an important consideration of light quality, especially in high color temperature white LED products
although the light efficiency and cost performance of LED are very important, the most important thing is the light quality and light color consistency. In the past, the demand for high light color uniformity of LED was small, so many enterprises focused on high cost performance and high luminous efficiency. But in the real high-end lighting field, the most basic demand for LED light color quality is light color consistency
for the development of technology, phosphor technology determines the LED, and the improvement of LED luminous efficiency in the future largely depends on the phosphor, so they are respectively connected to the phosphor technology as sub modules under the main module of the experimental program. But besides the light effect, the uniformity of light color is more important. This is why orsamos launched 10 points bin4 1 high-precision hydraulic sensor; Reason for
a few days ago, OSRAM semiconductor technology manager chenwencheng said that at present, enterprises generally use McAdams ellipse to measure color consistency, and believe that there will be no obvious color difference in the 3-step McAdams ellipse, but in practical application, the LED made of 3-step color bin has obvious color difference
OSRAM semiconductor has introduced the 10 binning standard for this purpose, but the standard is only the threshold, which can not solve the problem of the product itself, but only raise the threshold. In order to solve the problem of light color consistency, we need to control all links and key parameters of the LED production process, such as how to make the phosphor evenly cover the chip surface and make the luminous color more uniform. In order to solve the problem of SMDLED phosphor evenly falling on the chip surface, according to fan maode, general manager of Dongguan Qinbang company, Qinbang launched the LED phosphor precipitator as early as 2010, The phosphor precipitation process has been recognized by everyone after years of market validation, and has become one of the indispensable standard equipment in the industry
how does the SMD LED break the game and maintain its position in the light quality arena? Published by the electromechanical industry. If you need to reprint, please indicate the source of the article. For more industry information, please click attention: electromechanical industry