Analysis of how to improve the reliability of LED tube lighting
About Gcl:GCL is a leading manufacturer and exporter of LED lighting,Our main products line including: led lights,led bulbs,led light,led strip lights,led tube.
With the blue and white light emitting diode (LED) in 1990, heavily towards the practical stage, whether it is color which makes use of LED display, or in a high degree of attention in recent years on the energy saving issue public show, LED spread to the intelligent mobile phone, personal computer (PC), TV, lighting, backlighting white goods or traffic signal and other diversified products increasingly wide application field. In order to meet the market demand, the industry for a variety of products, including can achieve high color rendering and high reliability of the lighting with LED, with PICOLED as the small thin LED products, as well as the vehicle into customized color LED considerable R & D resources.
Lighting with white LED output is growing rapidly
The world is rising trend of energy saving and the northeastern Japan earthquake awareness of energy conservation, the Japanese market for lighting the demand for white light LED increase, the LED lighting market value is continuously rapid growth, however, to make the light from incandescent lamp lighting the traditional way of converting to LED lighting, there are, in the characteristics of the product still some problems to be solved which focus on R & D, industry especially in the LED lamp high color rendering and high reliability, the following will be employed for high Ra value and luminous efficiency do share.
Both high Ra value and the luminous efficiency
The average color rendering index (Ra) is a light source to make the object or to reproduce a true color index, a higher index, represents the color reproducibility is better (solar light as Ra 100), the market for lighting with white LED can provide both high luminous efficiency and high color rendering (Ra ≥ 80) however, the luminous efficiency and Ra values between the two there are benefits balance (Trade-off) characteristics. Because the market for the luminous efficiency have higher requirements, therefore, currently on the market for Ra ≈ 70 high luminous efficiency of LED.
Package structure of general white light LED lamp is the blue LED chip mounted on the substrate, and then to resin containing fluorescent body package. In the light of color LED element (led blue) light and fluorescent body color (yellow, red or green) after mixing, will form a white.
From the light emitting efficiency point of view, the general mostly blue + yellow light to form white light, and this will cause red poor reproducibility, therefore not suitable for lighting purposes. A general solution for the red component is increased, thereby improving the reproducibility of the red, but so will lead to the problem of non ideal luminous efficiency.
For both high luminous efficiency and high Ra value, the industry will be phosphor efficiency is arranged on the package inside, to satisfy both sides of technology as a solution, successfully developed a Ra ≥ 80 and luminous efficiency of high product. This series of products in both Ra or R9 (red) index on the performance are very good, with a Ra value of other brand products in the same comparison, this series of products with higher R9, red reproducibility is better. With this breakthrough, LED lamp can reduce the color is not uniform, but also for more detailed color grade.
High reliability
In recent years, the market demand for related reliability becomes increasingly rising. Especially since the LED package of the higher, commonly used in silver, but silver sulfide (because of a phenomenon caused by reaction with sulfur and black) caused by the deterioration of the phenomenon of LED beam, causing serious problems for outdoor LED lamp, so the producers who put forward various silver scheme coping strategies, but the problem is still not completely improve.
In view of this, the industry abandon plating nickel / gold plating, adopt the way. LED package will be changed to the nickel / gold plating, although it will lead to increased costs, and because of the decrease of reflectivity and causes the luminous efficiency, but through the packaging structure is improved, these problems have been successfully overcome.
The new package structure can maintain high luminous efficiency, and can achieve high reliability of the LED lighting performance, this series of products even in curing test also showed excellent performance, can completely avoid the beam deterioration phenomenon.
LED small / thin
With the mobile device volume thin and short, the market for small spacing product demand year after year strong, parts also faces more reduced height and reduce the size requirements. In addition, because the outdoor full color display device usually adopts LED, in order to improve the performance effect, full-color LED package also toward higher density development.