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22/09/2013 09:08
Spotlights to project the beam can be focused on a painting, a sculpture, a potted plant, a fine LED Downlight furnishings, etc., can also be reflected in the master bedroom sitting in the chair back, creating a colorful, exotic charm lighting effects. Can be used in the living...
18/09/2013 09:29
LED lamp drive power required output power is larger, requiring a higher conversion efficiency, LED Downlight and the need for better regulation and less ripple , considering LED lighting device needs to be isolated from the grid in order to improve safety, Therefore, a single-ended flyback...
18/09/2013 09:28
Figure 5
MR16
Its resistance to Z, parallel capacitance is about 4-10pF. Their typical voltage characteristics shown in figure VI .
Figure 6
T8 Tube
It is within a certain voltage range there is a constant , in this interval , the current flowing through almost constant ,...
18/09/2013 09:28
Two works:
LED Bulb Resistor R3 is constant , the voltage drop across R3 to control the use of a switch TL432 , in the use of a switch 432 to control the Q1 of output current so as to achieve the purpose , the purpose of selection is to use 432 432 on the basis of 1.21V to reduce the loss on...
17/09/2013 09:39
Production of white high brightness LED light intensity 1:2:0.38 ratio by mixing white, two kinds, LED Bulb the use of ultra-high InGan blue LED, the tube always add a little pomegranate as the main drill yttrium phosphor, it can in blue excitation produces yellow green, and this...
17/09/2013 09:39
3, LED light, long life
LED Lighting china
Incandescent, fluorescent, halogen is the use of electronic light field radiation emitting filament light easy to burn, heat deposition, the light attenuation characteristics, and the use of LED lights, small size, light weight, epoxy resin, high...
17/09/2013 09:31
LED light source dynamic luminous characters to form the appearance of text or logo, mounted MR16 on top of buildings or walls, use led as light source, use bright LED chip, the use of control systems, text or logo on the dynamic video control unique design of the traditional With...
16/09/2013 09:23
( 1 ) Accuracy PWM generation, and duty cycle control, and precision dead zone, in order to LED Bulb achieve the power level more efficient and high-performance control . Advanced PWM provides a very accurate color output and generates dimming level capabilities. For example, by...
16/09/2013 09:23
Cartesian coordinate conversion algorithm to the circle as follows [ 9 ] :
void ConCoor (int x, int y, int * rad, int * angle) { LED Downlight
double r, a;
2.2 TLC5947 chip timing
TLC5947 sequence shown in Figure 3 , the chip has four main control pin [ 10 ] : a data input...
16/09/2013 09:22
Piccolo microcontroller will be a function of the lighting system is divided into core and CLA C28x core with a chip to achieve a complete smart LED controller . For example , CLA PLC algorithm can be used to run while C28x core is focused on the digital power conversion and control of the LED...
