Description: Power LED, generally refers to greater than 0.65W, this house will have different standards, consistent with recognized industry standards in the field of high power LED not yet formed. Light intensity and lumen than the low-power, but the same heat is also a great, and now power most single applications, coupled with effective cooling area a lot of heat sink, also appeared in the integrated LED lamp matrix, but the cooling effect not very good. Low-power is about 0.06W. The LED flashlight is generally with a small power, and scattered light lingers, depending on the LED light angle, large angle and small-angle points, small-angle ghost, only scattered large angle. Flashlight on the market with hat head. Good results. Now worried that some manufacturers are not quality, take the defective LED as flashlight, and will not be long before there dead lights.
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第四章_快速傅里叶变换(FFT).ppt
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