Symmetric cancelling anti-striation circuit

摘要

A striation correction circuit 300 is arranged to apply a first striation correction current to the first fluorescent lamp L 1 and a second striation correction current to the second fluorescent lamp L 2 . A first voltage appearing across the first fluorescent tube L 1 due to the first striation correction current is substantially similar in magnitude but has inverted polarity with respect to a second voltage across the second fluorescent tube L 2 due to the second striation correction current. Detection of an end-of-life condition of a fluorescent lamp is facilitated.