Methods and apparatus for driving discharge lamps
AssigneeMonolithic Power Systems, Inc.
InventorsNaixing Kuang, Lei Du, Junming Zhang, Yuancheng Ren
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Abstract
Methods and apparatus for driving discharge lamps are disclosed herein. In one embodiment, a method for driving a discharge lamp includes generating a switching signal to drive a discharge lamp, monitoring a working status of the discharge lamp, and determining whether the discharge lamp is operating abnormally based at least in part on the monitored working status. The method also includes decreasing a duty cycle of the switching signal when the discharge lamp is determined to operate abnormally.
Claims17
An apparatus for a driving discharge lamp, comprising:
- a switching circuit electrically coupled to a discharge lamp, the switching circuit comprising a switch configured to generate a switching signal to drive the discharge lamp;
- a status monitoring circuit operatively coupled to the discharge lamp, the status monitoring circuit configured to monitor a working status of the discharge lamp;
- and
- a control circuit configured to control the switching signal produced by the switch based at least in part on the working status monitored by the status monitoring circuit, wherein the control circuit is configured to decrease a duty cycle of the switching signal when the working status of the discharge lamp indicates abnormality.
A method for driving a discharge lamp, comprising:
- generating a switching signal to drive a discharge lamp;
- monitoring a working status of the discharge lamp;
- determining whether the discharge lamp is operating abnormally based at least in part on the monitored working status;
- and
- decreasing a duty cycle of the switching signal when the discharge lamp is determined to operate abnormally.
Dependencies are inferred from the claim text.