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rrxnjy17 · Joined: 07 Dec 2011 Posts: 145 Location: England

at present, some well-known brands in the indusy technical aspects of these two important breakthrough has been made, and through the implementation of many projects makes the case has entered a mature technology. 4. conclusion times so far, we can see that: began in the early nineties the vertical direction by compressing the led optical axis angle to increase the brightness of the display technology road after nearly two decades of development and application, due to the presence with the increase of viewing angle and uniform brightness dropped significantly the serious deterioration of the two major drawbacks in the new materials, new technologies, new processes of growth and maturation has been questioned and challenged. from the pursuit of higher image quality and performance point of view, the technology only for the observer line of sight with the vertical axis displays the angle is small (i recommend conol within 10 °). when the observer's attention and display the angle choice, features smooth, with light curves similar to the cosine function of the surface mount .advertising signs
zenigata and minizeni series of optical design. sharp lens, the bandwidth for multiple series of products to the radiation from the angle of the selected point of the spotlight in a wider range of lusm30 ° around the condenser. now, in addition to three or more series of led products, the sharp's partner even supply the screws, glue and scissors. idealed even zenigata module developed step can link directly to the optical part of the process module, namely, the led module encapsulation. these so-called "potting zenigata" led module can be used directly as seet lighting. in order to obtain diversified products, the two experts using a special optical lens made of plastic, the temperature just over 100 ° c. mirror-based optical systems, lens system there are two advantages. writing board
led lamp manufacturers are very cost-conscious. the current ac / dc current source driver ic is from the flyback topology to high-efficiency resonant half-bridge (llc) + pfc topology to maximize the topology of zero-voltage switching (zvs) of the edge, and meet the led lamps on the pfc (power factor more positive) the increasing demands and requirements at a lower power level (eg, <50 w) when 90% efficiency. wide voltage input, short circuit and over-power protection, open circuit protection, low total harmonic distortion (thd) is the basic requirement. figure 3 ac / dc current source driver ic is from the flyback topology to high-efficiency half-bridge llc resonant another ac / dc current source driver ic development by power factor correction ((pfc) and pulse width conol (pwm) two kinds of average current mode conoller to form a new driver.neon signs california