Driving circuit for multiple cold cathode fluorescent lamps
First Claim
1. A driving circuit for driving a light source comprising:
- a transformer comprising multiple primary windings and a secondary winding, wherein said multiple primary windings are coupled to a power source and said secondary winding is coupled to said light souce;
a first switch for conducting current through a first path comprising a first set of primary windings coupled in series; and
a second switch for conducting current through a second path comprising a second set of primary windings coupled in series, wherein said first set of primary windings and said second set of primary windings comprise said multiple primary windings corresponding to said transformer.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a driving circuit for driving a light source. The driving circuit includes a serial-arranged transformers system having multiple primary windings and secondary windings; a first switch conducting current though a first path and a second switch conducting current though a second path. The first path is a first set of primary windings connected in series and the second path is a second set of primary windings connected in series and the first set of primary transformer windings and the second set of primary transformer windings form the dual primary windings of the transformers respectively. Based on the conduction of each switch, a DC voltage source supplies power to the primary windings of the transformers, which in turn powers on the light source connected to the secondary windings of the transformers.
-
Citations
40 Claims
-
1. A driving circuit for driving a light source comprising:
-
a transformer comprising multiple primary windings and a secondary winding, wherein said multiple primary windings are coupled to a power source and said secondary winding is coupled to said light souce;
a first switch for conducting current through a first path comprising a first set of primary windings coupled in series; and
a second switch for conducting current through a second path comprising a second set of primary windings coupled in series, wherein said first set of primary windings and said second set of primary windings comprise said multiple primary windings corresponding to said transformer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A method for driving a light source, said method comprising:
-
switching a first switch to conduct current through a first path comprising a first set of primary windings coupled in series in a transformer;
switching a second switch to conduct current through a second path comprising a second set of primary windings coupled in series in said transformer, wherein said first set of primary windings and said second set of primary windings comprise multiple primary windings corresponding to said transformer. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
-
29. A display system, comprising:
-
a plurality of light sources;
a driving circuit for driving said plurality of light sources, said driving circuit comprising;
a transformer comprising multiple primary windings and a secondary winding;
a first switch for conducting current through a first path comprising a first set of primary windings coupled in series; and
a second switch for conducting current through a second path comprising a second set of primary windings coupled in series, wherein said first set of primary windings and said second set of primary windings comprise said multiple primary windings corresponding to said transformer. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
-
Specification