led backlight technology advantages of the two: light elegant led backlight is the number of grid-like semiconductors, each "grid" has an led in both the semiconductor, so that you can successfully planar source. the plane of the light source not only has excellent brightness uniformity, do not need a complex optical design. as a result, lcd thickness will be able to do more light, while with higher reliability and stability. belong to the aditional ccfl light tube, to evenly spread the light of their issue to the panel in every region needs a rather complex auxiliary components. its difficult to conol the thickness of the screen, and with the panel increases, the need to use multiple light sources, which further exacerbates the complexity and cost of design, large screen lcd tv which is more sensitive. for example, 50 inches above the lcd or tv product.
neon beer signat this point, chold power by the following linear potentiometer connected to the charge when c1 is between input and ground, chold linear potentiometer in accordance with the following battery discharge following equation to calculate the peak output voltage ripple peak value of the total number of more high switching frequency can be in a smaller output capacitor to obtain the same ripple. the parasitic effect of the charge pump output voltage with the load current causes the increases. in fact, there is always 2iout the rms current flowing through c1 and two switches (2rsw), result in less power consumption addition to these purely resistive losses, iout of the rms current through the switched capacitor c1 of the equivalent resistance, resulting in the power consumption is short, because of low esr ceramic capacitors and high switching frequency, output ripple and output voltage drop depends on the switch resistance. use more switches and capacitor voltage conversion can be achieved more. (figure 3) shows the use of this feature of the circuit capacitance.
illuminated signscurrently, led lamps designed mass-produced light effect has reached 90lm / w or more, including application of these technologies in the life of the lamp aging laboratory has more than 21,000 hours, the light fades only 3.5%. on this basis, the company is continuing to optimize the design, further enhancing devices and applications, led light effects at the same time, significantly reduce unit costs, is expected to led devices, the luminous efficiency will reach 120 ~ 130lm / w or more; in indoor lighting / lighting products, the product of light efficiency will reach 100lm / w or more, the unit cost reduced by at least 40% than it is now. in addition, with the increase in volume of business and project technology products on the rise, 2010, companies in the "863 project - power type led lighting device of the module" project in product expansion, 180 jobs have been added , forming an annual output of 10 million sets of led light source / light indusial scale. in 2009, the output value of semiconductor lighting products to 1.6 billion, has more than 60% of total sales in 2010 compared to january.
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