a constant current output. such applications can use the following different options to meet different needs: ncl30001: single-stage pfc led driver; ncp1607 + ncp1377: crm pfc + qr pwm; ncp1607 + ncp1397 or ncp1392 / 3: crm pfc + llc pwm. figure 4: based on ncl30001 the 40-150 w ac-dc led lighting solutions to ncl30001 example, which is a continuous current mode (ccm) conoller for 40 w to 150 w power range of single-stage pfc led driver. this device frequency jitter and voltage feed-forward, include input under-voltage and overload timer, to provide high efficiency and high power factor and robust protection features, figure 4 is a typical application ncl30001 circuit. it is worth mentioning that in recent years, the indusy of led lighting, high efficiency topology of growing interest, expect a relatively low power levels (<50 w) to provide energy efficiency higher than 90%, even more than the energy efficiency targets.
menu boardauo variety of small and medium size display applications and technology is also key, including general indusial applications of high resolution and high conast lcd panel, amva mobile high conast wide viewing angle technology, and the narrow border amorphous silicon (a-si) lcd panel and so on.for energy-saving in most counies, this has become a consensus pre-target, ying to reduce the power consumed by lighting is the main task of eleconic design engineers. the environmental conditions for the led to show a very large business development opportunities, because the led is not only with low power consumption, compared with the aditional lighting solutions, it generates less heat, energy efficient, thus driving the led lighting to accelerate away into real life applications.
led billboardin addition, the use of pc diffusion subsate, the module addition to the general characteristics of ansparent windows outside, and with good toughness, the consuction of a bullet-proof glass, and sengthen the protection of home security. power generation and energy security of both the bullet-proof windows, will be the future of green building standard. energy-saving wisdom blinds, color books, soft pressure sensor developed by elecowetting ii lcd (elecowetting dilay, ewd) modulation of green energy smart window, because the lcd of the ink and water immiscible, quick reaction, conversion time of about 12 to 13 milliseconds, and with rgb inkjet process is suitable as a window color change display. in addition, power consumption is exemely small, only 20 volts to the low drive voltage, with independent solar power supply, no external power supply, you can to save energy, the color application in the future consuction and home windows.
led signboard
