| 摘要 |
<p>A Light Emitting Diode(LED) driving device, comprising: a light attenuation regulator module(3), for generating and outputting light attenuation compensation signal which is monotonously changed in a default rate with lighting time increasing according to the attenuation level of the luminous intensity of an LED light source with lighting time increasing; an LED driver(1), which is connected between a power supply and the LED light source, and with a dimming line(2) reserved. The LED driver(1) is connected to the light attenuation regulator module(3) through the dimming line(2), and is controlled by the light attenuation compensation signal on the dimming line(2) so that its output current increases with lighting time increasing. Using the technical solution, the light attenuation compensation signal which is the output from the LED driver(1) with the dimming line(2) to the dimming line(2) by the light attenuation regulator module(3), is controlled by the dimming line(2) to output current increasing with the accumulative lighting time of the LED light source increasing, thus the luminous flux output by the LED light source is increased with the accumulative lighting time of the LED light source increasing and light attenuation compensation is carried out. The solution does not need to reserve current during driving LED light sources, and then resources are saved.</p> |
