Method and Apparatus for Operating a Semiconductor Light Source
AssigneeDialog Semiconductor (UK) Limited
InventorsJunyue Sun, Yufeng Zou, Huibin Cao, Lijie Chen
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Abstract
A method and apparatus for operating a semiconductor light source is presented. In particular there is a current regulator for regulating a current flowing through a light emitting diode device. The current regulator includes a first switch for receiving a first current flowing through the semiconductor light source and a control circuit coupled to the first switch and adapted to provide a second current proportional to the first current. The current regulator is adapted to regulate the first current using the second current.
Claims20
A current regulator for use with a semiconductor light source, the current regulator comprising
- a first switch for receiving a first current flowing through the semiconductor light source;
- and
- a control circuit coupled to the first switch adapted to provide a second current proportional to the first current;
- wherein the current regulator is adapted to regulate the first current using the second current.
A driver for driving a semiconductor light source, the driver comprising
- an alternating power source coupled to a rectifier for providing an input voltage to the semiconductor light source, and
- a current regulator comprising a first switch for receiving a first current flowing through the semiconductor light source;
- and a control circuit coupled to the first switch adapted to provide a second current proportional to the first current;
- wherein the current regulator is adapted to regulate the first current using the second current.
A method of driving a semiconductor light source wherein a first current flows through the semiconductor light source, the method comprising the steps of:
- providing a second current proportional to the first current;
- and regulating the first current using the second current.
Dependencies are inferred from the claim text.