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30/08/2013 08:49
Figure 2: one from a 45V input to drive the 160 white LED 16-channel LED driver. PWM dimming ratio of 5000:1.
LED Downlight
Most battery-powered portable products have one or more display graphical information delivered to the user. However, TFT-LCD screen (even OLED screen) power...
30/08/2013 08:48
Littelfuse fuses, metal oxide varistors and TVS diode lamp manufacturers in helping pass some MR16 important laws and safety standards play a key role. For some indoor commercial lighting, as well as roads, parking lots and garages to establish a unified lighting performance and safety...
30/08/2013 08:48
Throughout the power input on a metal oxide varistor (MOV) provides overvoltage clamp LED Bulb protection. Their high cost, and can minimize the electronic device may pass into the downstream of the transient power. Metal oxide varistors are selected based on a number of parameters,...
29/08/2013 09:34
(2) the light intensity and the light intensity distribution
LED Lighting china
Figure 4: LED light intensity test in question
Shown in Figure 4, the point light source in all directions uniformly in the spatial intensity distribution at different...
29/08/2013 09:33
Spectral power distribution of the test need be by spectrophotometry, the light from the mixed LED Bulb color light is measured to distinguish, generally can be used to achieve spectral prism and the grating.
Figure 6: White LED spectral power...
29/08/2013 09:32
Figure 7: LED color characteristics of the test method
MR16
5, the thermal characteristics
LED thermal characteristics mainly refers to the thermal resistance and junction temperature. Thermal resistance is the heat flow along the channel and the channel temperature difference...
28/08/2013 09:14
Current for LED lighting products mainly include Energy Star requirements for LED bulbs Integral LED Bulb LED Lamps V1.4, effective time for the May 13, 2011, and for LED lamps Luminaires V1.2, effective time December 21, 2012 days. LED bulbs are suitable mainly three types:...
28/08/2013 09:13
Energy Star is a very strict market supervision, EPA annually on all ENERGY STAR products should LED Downlight be randomly selected products from the market for regular checks, checks the unqualified products to immediately cancel the Energy Star qualified and entitled to...
28/08/2013 09:13
lighting Energy Star test lets consider the same series test lamp housing and base, LED thermal MR16 management components, shape, installation, electrical connection, reflector and lamp trimming, lampshades and scattering lens, light source characteristics, correlated color...
27/08/2013 09:20
(1) CNC dimming electronic ballast composition and working principle
LED Lighting china
NC dimming electronic ballast circuit should contain the following sections: EMI filter, rectifier, power factor correction, electronic ballast output stage and CNC dimming control circuit shown in Figure...
