Line head and image forming apparatus using the same

摘要

A line head includes a plurality of the light emitting element columns which has a main light emitting element column exposing a light amount necessary for exposure to an image carrier and an auxiliary light emitting element column exposing the image carrier so as to obtain the light amount necessary for exposure even when a light emitting element having a pixel defect is existed in the main light emitting element column. Also, a line head includes a plurality of the light emitting element columns. The light emitting element columns includes a main light emitting element column exposing an image carrier and an auxiliary light emitting element column exposing the image carrier when a light emitting element having a pixel defect is existed in the main light emitting element column.