The problem comes, street lamp LED light source in the end what kind of strong?

In recent years, COB light source applications more widely, especially focused on the interior light field lamp, lamp etc.. In addition, it is also used in the field of light, industrial and mining lamps, tunnel lights. In the field of LED street lamp based on a high-power LED lamp, COB light source is also beginning to have a space for one person. There is a controversy in the market, whether the COB/ injection molding integrated light source (containing PPA plastic material) is suitable for outdoor lighting field? COB light source in the street market acceptance of what is the situation? China LED network editor on this topic related to the investigation of COB manufacturers.

Heat dissipation is a big problem to be solved

Currently on the market with COB/ injection molding integrated light source to do a lot of street lighting companies. "Honglitronic Engineer Shi Chao told Chinese LED network editor," with the market evaluation now with COB/ injection type integrated light source lamps and a single power do not what differences in the reliability of street lamp. "

But he also said that the production of lamps with COB/ injection integrated light source, if one chip failure, that will cause the light source, lamp is in the failure state (the vertical insulation structure based COB), single power can be through some special circuit design to avoid the above problems, including there is a LED failure, other LED is still in the normal working state. Of course, if the COB light source can achieve high reliability of the chip is the best choice of street lamps. "

Apart from the possible failure problems exist, the industry generally believe that with the COB/ type injection molding production integrated light source lamps in the thermal design of the difficulty is generally higher than that of using single power source.

Because the COB light source is a number of chips integrated together, personally think that the reliability of the lamp used is not particularly good. Samsung LED China General Manager Tang Guoqing in an interview with China LED network editor, said, this is a personal favorite, personally think that is not the mainstream. "

BYD lighting LED application development center manager and plant manager Tang Jun said that the current BYD lighting street lamps with a single 1W/3W light source. "COB light source to do street lighting companies, but not many. COB light source is the chip together, so heat is the first problem to be solved. "

If there is a single COB light source is not a problem, but with the whole lamp, then there is a challenge to heat. "Ashineon President Fan Zhencan told China LED network editor, currently ashineon customers try to use COB light source lamp production, but has not yet formed.

"The use of a single high-power lamp making lamps in thermal design difficulty is relatively small, because of the heat effect on unit area is relatively low. COB/ injection type integrated light source in about 250 square millimeters bearing 100W (thermal power dissipation of 20-30W and 5-10W molecular vibration heat balance of power), the heat is concentrated, which increases the difficulty of heat dissipation design. If the heat dissipation problem is solved, the heat distribution and dissipation of COB/ injection integrated light source can be solved reasonably. Shi Chao said.

Shanxi gyled vice president Xu Min said, the heat is not only COB light source itself, but also includes a light source structure, which has great relationship and thermal design of the lamp structure. From the street level, the COB light source and a single high-power program in the entire structural design there are differences, such as we do a lot of flat this structure, it is not suitable for COB. Because of the COB light source is relatively concentrated, so it must not be a form of heat dissipation of this kind of flat, but similar to the sun or other types of suitable for its thermal design. "

COB light source used in street lamps

According to Xu Min said, Shanxi Guangyu various lamps including street lighting is the use of COB light source production, currently shipments of lights is also good, large and small projects have received the case.

Although COB/ injection integrated light source used in the production of street lights in the failure, heat dissipation is also quite controversial, but its advantages in the distribution of light and lamp design is much more favorable. "Light is better to do, because it is a whole, closer to the traditional sodium lamp light source. And better shape to do, you can do a little smaller, reduce material. Tang Jun said.

Shi Chao also believes that COB/ injection integrated light source in optical design has advantages. "A single large power device to match the lens module, is not a direct distribution of light on a system, and COB/ integrated light source can be directly made into a complete optical. "

"Street light is a weight requirement. Because of the high degree of integration of the COB light source, in the space configuration is relatively good design, you can do a relatively small lamps. Gao Jiwei, director of the Department of optoelectronic technology, such as said.

The new moon photoelectric general manager Zou Yiming also expressed a similar view, "COB lamp light source in the application will certainly, this is no doubt, because the subsequent street to do a little bit, not like before doing so, before the lamp package volume are relatively large. "

While the price for issue of widespread concern in the industry Xu Min said, "if it is the whole lamp, the price is really not too like, because the lamp is not light, involves the internal structure design and design etc.. "

Tang Jun has a different view, if you solve the problem of heat dissipation, the use of COB light source should be cheaper than a single high-power. "

Shi Chao also said, from the price level, COB/ injection molding