Shen Tianhang: advantages of small power LED light source

In November 17th at the cross strait lighting technology and marketing seminar, Professor Shen Tianhang of Tianjin University School of architecture to meet and chat with reporters, Professor Shen, learned that the professor has been 75 years old, with a number of doctoral students, "this group of students graduated, I can really rest! In the discourse, Professor Shen Ping is natural, like a neighbor's aunt. Outside the venue, the reporter intends to help Shen professor with the conference information, Shen professor said with a smile, I ride a bike! "

At the seminar, Professor Shen made a speech entitled "two mistakes" LED lighting in the report, report describes her some of the LED light source lighting research experience, the contents of the report as well as the professor himself flat and plain, but it gives people deep inspiration.

Professor Shen in the report that the power of small power LED in general is a few percent watt meter, the light emitted by the light is not enough to solve other people's problems, so many people to develop high power LED, and caused a feeling to people, think that LED power is good, in fact, it has small power LED the advantage worth the attention of people.

One advantage, small power

Professor Shen believes that because many of the traditional light source power is easier to make a small power is more difficult, but the opposite of LED. The object and to illuminate the big and small, with high power light and small objects are overkill, will cause a lot of waste. On the other hand, due to the small power can be arranged according to the needs of the lamp, in the design of energy consumption can not only haggle over, or even 22.

Advantage two, high light efficiency

Professor Shen said here, high light efficiency is relatively high power LED. At present, there are a lot of high-power LED is a combination of a small number of small chips, because the chip squeezed together, some light will not come out, there is light energy into heat. Therefore, the high power LED light efficiency is lower than the small power LED, high light efficiency is one of the reasons for the low power LED energy saving. And now the heat is an important issue of high-power LED, the greater the power problem is more serious. Do not but will directly affect the longevity of the high beam, but also affect the ecological environment.

Advantage three, small size

The professor said that the area of the small power chip is generally 0.3 x 0.3mm2, after the package is phi 3- Phi to 5, so it is easy to hide, there is no problem with the night landscape lighting lamps affect the landscape. In addition, the small size is convenient for the nearby irradiation to suppress the stray light and reduce the light pollution.

Advantage four, low brightness

Professor said that the brightness is low, refers to the light emitted by the same luminous flux, people watch the light source brightness is low, so that the light source in the work, even if the direct viewing of the human eye is not easy to glare. Layman candidate light source is directly with the eyes to see the light source, that is, the brighter the better, the candidates for the light source is in the same conditions, the illumination of the object is high, the light source itself is low brightness is good. High power LED due to the concentration of the light-emitting surface at a point, so its brightness is much higher than the small power LED, which is not conducive to human health.

Professor Shen said in the report: summary of the development of LED should be designed for high luminous efficiency, not for large power; the pursuit of reducinglow bright, avoid the harsh light source itself; the advantages of LED itself is small, creating unique type lamp. Finally, the professor hopes the industry colleagues to create more and better LED lighting products.

Source: China semiconductor lighting network