LED driver
First Claim
1. An LED driver for driving a light emitting diode, comprising:
- a linear mode driver to increase and decrease a linear mode current to make a current flow in the LED at a predetermined target current value and output it to the LED; and
a switch mode driver to increase and decrease a switch mode current depending on whether the linear mode current exceeds a predetermined reference current value and output it to the LED.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to an LED driver for driving light emitting diodes. The LED driver comprises a linear mode driver to increase and decrease a linear mode current to make a current flow in the LED at a predetermined target current value and output it to the LED; and a switch mode driver to increase and decrease a switch mode current depending on whether the linear mode current exceeds a predetermined reference current value and output it to the LED. Thus, the present invention provides an LED driver having high power efficiency and light efficiency and minimal distortions of a driving current.
19 Citations
12 Claims
-
1. An LED driver for driving a light emitting diode, comprising:
-
a linear mode driver to increase and decrease a linear mode current to make a current flow in the LED at a predetermined target current value and output it to the LED; and
a switch mode driver to increase and decrease a switch mode current depending on whether the linear mode current exceeds a predetermined reference current value and output it to the LED. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method of driving an LED unit, comprising the steps of:
-
increasing or decreasing a linear mode current to make a current flow in the LED unit at a predetermined target current value; and
increasing or decreasing a switch mode current depending on whether the linear mode current exceeds a predetermined reference current value. - View Dependent Claims (8, 9, 10, 11, 12)
-
Specification