| 摘要 |
A driving circuit (1) for driving at least one lamp (2a; 2b) comprises two DC voltage sources (3) connected in series, thereby providing a positive pole (P+), a negative pole (P-) and a center point (C) between the two DC voltage sources (3), wherein the driving circuit (1) comprises for each lamp (2a; 2b):
- a first wire (4a; 4b) connecting the lamp (2a; 2b) to the positive pole (P+),
- a second wire (5a; 5b) connecting the lamp (2a; 2b) to the negative pole (P-),
- a central wire (6a; 6b) connected to the center point (C) and branching at a branching point (Ya; Yb) to be connected to both the first wire (4a; 4b) at a first connection point (X1 a; X1 b) and to the second wire (5a; 5b) at a second connection point (X2a; X2b),
- a first switching unit (L1A; L2A) which in a first switching state connects the positive pole (P+) to the first connection point (X1a; X1b) and interrupts the connection between the central wire (6a; 6b) and the first connection point (X1 a; X1 b), and in a second switching state vice versa, and
- a second switching unit (L1B; L2B) which in a first switching state connects the negative pole (P-) to the second connection point (X2a; X2b) and interrupts the connection between the central wire (6a; 6b) and the second connection point (X2a; X2b), and in a second switching state vice versa.
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