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tmptkr57 · Joined: 13 Dec 2011 Posts: 66 Location: England

basically, gan led based epitaxy (epitaxial) method grows in the sapphire subsate (sahire suate) on the bottom of the epitaxial gan and sapphire subsate lattice constant (lattic e cotant) and thermal expansion? s number (coeff icient of thermo expaio cte) vary greatly, so the line will produce high-density dislocations (thread dislocation) up to 108 ~ 1010 / cm2, such high-density line will limit the dislocation gan led luminous efficiency. in addition, hb-led sucture, in addition to the active layer (ac tive region) and the other layer will absorb the light, the other must be noted that the high semiconductor refractive? s number (high refractive index), which will make the led generated light has been limited (aed light). in figure 1 to illusate, fired from the active area of semiconductor light rays reach the interface with the surrounding air.neon sign
does not have a stable output for led current conol device, when the input voltage rating, the output current and is equipped with the led's operating current than the bias should be less than 10%. figure 4 conols the output current of the led conoller test circuit 3, the capacitive load requirements of led conol device, in addition to the output voltage or current according to classification, in terms of performance, also has two categories, one is only a single drive with led function, the other is in addition to the function of a drive led, but also has a computer conol signal receiving port and / or have conol led color, flashing, alternating bright and dark features such as led conol device that has set itself the logic of circuit. writing board
twinkling of aditional ccfl lamp low frequency performance of dynamic scenes may have the screen jump. flexibility to adjust the light-emitting led backlight frequency, and the frequency much higher than the ccfl, thus a fine display of motion pictures. 5) real-time color management. as an independent 3 color rgb led, it is easy to accurately conol color characteristics of the current display. 6) you can adjust the backlight, white balance, while ensuring the overall conast. when the user's computer and video source switching between dvd drive, you can easily adjust the white balance between 9600k and 6500k, but without sacrificing brightness and conast. 7) for the large size of the screen provides a continuous source array. is a planar led light source, light-emitting unit is the basic.neon beer sign