World Press Network

movpe gan production technology that can produce high-brightness led pure blue and pure green led, also can be applied to blue, green laser diode of the production. although movpe epitaxy is a mature production technology, but this technology to produce gan blue led which still have considerable expertise, experience and skills alingap algainp. alingap this material is used in high brightness led in recent years, the manufacturing of the newer material, the use of movpe epitaxial legal process. neon signage
such as the left: (1) positive dead is called reverse breakdown voltage; vr voltage corresponding to the reverse leakage current ir. when the reverse bias has been increased vthen there arise a sudden increase in ir breakdown phenomenon. because different types of materials used in compounds, various led's reverse breakdown voltage vr is also different. to the junction capacitance (zero bias) so.neon sign
led's light up time - the rise time tr is the power to reach normal brightness 10%, has been to reach brightness 90% of the normal experience of time. led off time - fall time tf is normal to the original light-emitting 10% less elapsed time. the led of different materials have different response time; such as gaas, gaa, gaalas its response time <10-9s, gap for the 10-7 s. so they can be used in 10 ~ 100mhz frequency system. message signs