Patent ID: 6213585
Filing Date: 2001-04-10
Classification: B41J,H04N

Abstract:
An image formation apparatus, comprising:a recording head having a plurality of recording elements arranged in line;moving means for moving the recording head in an arrangement direction of the recording elements;feed means for feeding a recording medium relatively in a direction virtually perpendicular to an arrangement direction of the recording elements of the recording head; andmeans for moving the recording head by a moving amount, T.times.L/K (T is a positive integer representing a head moving step amount, and L is a spacing between the recording elements) determined so as to correspond to a specific feature of a human visual system every time a recording medium is fed with respect to the recording head while allowing the moving means to move the recording head in the arrangement direction of the recording elements and allowing the feed means to feed the recording medium to the recording head repeatedly multiple times, thereby printing dots at pitches of L/K (K is an integer of 2 or more) smaller than arrangement intervals of the recording elements,wherein said head moving step amount T is set at a minimum step amount which is given by an integration of products obtained by multiplying a spatial frequency characteristic of a formed image and a spatial frequency characteristic of visualization.