ELectric image printer.

摘要

An image printer comprises a printing head (2) having printing dots arranged in a line, print drive circuitry (7) for driving the printing dots grouped into a plurality of blocks, and a stepping motor (9) for feeding recording medium. An area gradation circuit (1) selects a required number of dots in a picture element constituted by an m x n matrix wich consists of m dots in the line direction and n dots in the feed direction. A concentration gradation circuit (1) selects a repetition rate for printing selected dots.