Invention Grant
US09247596B2 Driving circuit for driving light-emitting circuit, and light-emitting device having the same 有权
用于驱动发光电路的驱动电路和具有该驱动电路的发光装置

Driving circuit for driving light-emitting circuit, and light-emitting device having the same
Abstract:
A driving circuit is used for driving a light-emitting circuit including a plurality of light-emitting elements connected in series. The driving circuit includes a first silicon controlled rectifier, a first current-limiting resistor, a first resistor, a controllable switch and a control circuit. One end of the first silicon controlled rectifier is grounded, and another end thereof is connected to a driving terminal for providing a driving voltage via the first current-limiting resistor. One end of the controllable switch is connected to the light-emitting circuit, another end thereof is grounded via the first resistor, and a control end thereof is connected to a first node between the silicon controlled rectifier and the first current-limiting resistor. The control circuit is configured to perform a control operation when a voltage applied to a second node between the controllable switch and the light-emitting circuit exceeds a predetermined voltage threshold.
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