Self-scanning light-emitting element array

摘要

A self-scanning light-emitting element array comprises a coupled array of light-emitting elements (T(-2), T(-1), T(0), T(1), T(2)) constituted so that a light-emittng element (T(0)) which is turned on influences (L1) a light-emitting element (T(1)) to be turned on next so that its threshold level is changed. When each element is clock-driven by a common drive pulse, the change in threshold level is shifted in the array direction, so that a turn-on operation is transferred in a clock period of the drive pulse.