| 摘要 |
PROBLEM TO BE SOLVED: To generate a thinning pattern of a new gradation other than a fundamental gradation only by storing plural kinds of thinning patterns corresponding to fundamental gradation levels as fundamental gradation display patterns. SOLUTION: A fundamental gradation display pattern table 27 stores plural kinds of thinning patterns corresponding to the number of the frames as fundamental gradation display patterns in accordance with fundamental gradation levels 1/2, 1/4. A gradation level decoder 22 controls the gradation level of display data. A fundamental pattern readout part 23 reads out plural kinds of patterns for every frame from the table 27 based on a discriminated gradation level and a frame count value. An ON-dot decoder 28 generates a new thinning pattern other than the fundamental gradation by repeating an operation determining whether a dot which is indicated by a line count value and a dot count value is to be turned ON or OFF for every dot unit by referring the fundamental gradation display patterns.
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