| 摘要 |
<p>The present invention relates to an apparatus for preventing variations in the brightness of light emitting diodes (LEDs) according to the production time and, more particularly, to an apparatus designed to prevent a brightness difference according to LED characteristics by supplying a constant current. The apparatus for preventing variations in the brightness is a circuit to fix a current supplied to LEDs. The apparatus includes a resistor connected to a battery power source and a transistor of the circuit to adjust the current; a first diode configured to make the circuit normally operated by supplying a constant current without resistance adjustment; the transistor connected to the battery power source, and connected to the resistor and an external diode to adjust the current of the circuit; and a second diode connected to the battery power source and the first diode of the circuit to supply a constant voltage.</p> |
