| 摘要 |
PROBLEM TO BE SOLVED: To perform printing with reduced toner consumption without omitting a necessary part. SOLUTION: When an economic mode is designated from a host, this effect is stored in a control register 501. In the host, an image of which the resolving power is half that of a printer is formed in the case of the economic mode. A pattern generation circuit 502 converts the respective pixels of inputted image data in resolving power corresponding to the mode. In the case of the economic mode, the pixels of the inputted data are converted to a 2×2 white pixel group if white pixels with respect to one input pixel and converted to a 2×2 black pixel group wherein only one of them becomes a black pixel if black pixels. Therefore, if pixels necessary when an image is formed in the host are left, they are not omitted and the consumption of toner becomes 1/4 the usual consumption of toner.
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