L'Oréal has developed an LED face mask that it thinks could be a game-changer in the beauty world. The internal components ...
We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Nancy Redd Shifts in the number of daylight hours — due to changing seasons or ...
Abstract: The main objectives in driving multiple LED strings include achieving uniform current control and high-performance pulse width modulation (PWM) dimming for all strings. This study proposes a ...
Dermatologists explain the science behind wildly popular treatments like red light therapy, which is now available at home—for a steep price. Full-face LED masks like this one can cost up to several ...
Abstract: The conventional ac-dc LED drivers fail to achieve high efficiency and optimized bus voltage over a wide range of input voltage. In order to obtain the better performance in high-line and ...
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