| 摘要 |
This present invention provides a drive circuit to drive LEDs. The drive circuit comprises a transistor and a voltage regulator. The transistor is connected to the LEDs in series. The voltage regulator receives a first voltage to generate a second voltage to control the gate electrode of the transistor. The second voltage can turn on the transistor and ensure this transistor operated in saturation mode to generate a drive current to drive the LEDs.
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