| 摘要 |
An apparatus for driving light-emitting diodes according to the present invention includes a first and a second light-emitting diode auxiliary drive part for controlling the lighting of a first and a second light-emitting diode part according to the current flowing through the first and the second light-emitting diode part respectively detected by a first and a second resistance. The first diode auxiliary drive part includes a first transistor with the input terminal connected to a current rectifying part and the output and the control terminal connected to each other, a second transistor with the input terminal connected to the output terminal of the first transistor and the output terminal connected between the other terminal of the first resistance and the second light-emitting diode part, and a third transistor with the input terminal connected to the input terminal of the first light-emitting diode part and the output terminal connected to both the control terminal of the second transistor and one terminal of the first resistance, the second transistor having the control terminal connected to the output terminal of the first transistor, while the second diode auxiliary drive part includes a first transistor with the input terminal connected to the output terminal of the first light-emitting diode part and the output and the control terminal connected to each other, a second transistor with the input terminal connected to the output terminal of the first transistor and the output terminal grounded, and a third transistor with the input terminal connected to the output terminal of the first light-emitting diode part, the control terminal connected to the output terminal of the first transistor, and the output terminal connected to both the control terminal of the second transistor and one terminal of the second resistor. |
