Image forming apparatus
AssigneeOki Data Corporation
InventorNobuo Waksugi
Life of this patent
Estimating the term…
Abstract
An image forming apparatus prints a first image data rendered at a first number of halftone levels based on a second image data rendered at a second number of halftone levels larger than the first number of halftone levels. A dot forming section forms lines of pixels on a print medium, the lines including a number of groups of sub lines of sub dots. The groups are aligned such that the sub lines of sub dots extend in traverse directions substantially perpendicular to an advance direction. A controller controls the dot forming section such that a selected number of sub dots in the advance direction are combined to form a pixel. Sub dots on the same sub line have the same exposure energy and sub dots on different sub lines in the same pixel have different exposure energies.
Claims9
An image forming apparatus that prints first image data rendered at a first number of halftone levels, comprising:
- a dot forming section that forms lines of pixels on a print medium, each of the lines including a number of groups of sub lines, each of the sub lines including sub dots, wherein the number of groups are aligned such that each of the sub lines extends in a first direction substantially perpendicular to a second direction in which the print medium advances;
- and
- a controller that controls said dot forming section such that a selected number of sub dots in the second direction are combined to form the pixel based on second image data rendered at a second number of halftone levels, sub dots on the same sub line having the same exposure energy and sub dots on different sub lines in the same pixel having different exposure energies.
Dependencies are inferred from the claim text.