| 摘要 |
A light emitting element driving differential switch ( 2 ) includes first and second transistors (M 1 , M 2 ). A third transistor (M 3 ) is connected as an auxiliary switch in parallel to the first transistor (M 1 ) whose drain is connected to a light emitting element ( 1 ). A third switch driving signal (IN 3 ) is input to the third transistor (M 3 ) to turn ON the third transistor (M 3 ) at a slightly earlier point in time than when complementary switch driving signals (IN 1, IN 2 ) are input to the first and second transistors (M 1 , M 2 ) to drive the first and second transistors (M 1 , M 2 ). This improves the rising characteristics of the output from the light emitting element having a high power level.
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