Led driving device and led driving method
AssigneeNEC Corporation
InventorSatomi MATSUMURA
Life of this patent
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Abstract
Disclosed is a LED lighting device or the like able to light and extinguish a LED, which has quick response properties to the flicker, with using composition of a simple power source circuit and maintaining softness for user's eyes. In the case that a direct current power source 1 starts applying a voltage to a LED 4, the LED driving device controls an amount of light of the LED 4 to increase as the time passes. In the case that the direct current power source 1 ends applying the voltage to the LED 4, the LED driving device controls an amount of the light of the LED 4 to decrease as the time passes.
Claims10
A LED driving device, in the case that a direct current power source starts applying a voltage to a LED, controls an amount of light of the LED to increase as the time passes, and in the case that the direct current power source ends applying the voltage to the LED, controls an amount of the light of the LED to decrease as the time passes.
A LED driving method, comprising:
- arranging a control circuit between a direct current power source, which drives a LED, and the LED;
- increasing an amount of light of the LED as the time passes in the case of starting applying a voltage to the LED by use of the direct current power source;
- and
- decreasing an amount of the light of the LED as the time passes in the case of ending applying the voltage to the LED by use of the direct current power source.
Dependencies are inferred from the claim text.