LED has been a popular choice

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For many years the light emitting diode (LED) has been a popular choice for use in status displays and matrix
panels. Now, you can choose among recently developed blue and white types (widely used in portable devices)
as well as the ubiquitous green, red, and yellow types. White LEDs, for instance, are considered ideal
background illumination for colored displays. But, you should note the inherent peculiarities of these new LED
devices when designing power supplies for them. This article describes the properties of old and new LEDs, and
performance required for power sources that activate them

2016-1-16 18:40 上传 Standard and White LED Basics and Operation.pdf

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