To conduct positioning with higher accuracy in a main scan direction.
The light emitting device includes a plurality of light emitting thyristors L1-L260 arranged in one array at an interval corresponding to a resolution of 1,200 dpi, and a plurality of transfer thyristors T1-T260 connected to the light emitting thyristors L1-L260. The light emitting device supplies a first transfer signal 1 and a second transfer signal 2 whereby the action of turning one of the transfer thyristors to an on state and the action of turning adjacent two transfer thyristors including the one transfer thyristor to an on state are repeatedly carried out. The light emitting device supplies a light emitting signal I corresponding to a resolution of 600 dpi by making a supply timing different between an odd number-even number mode in which the light emitting thyristor of an odd number and the light emitting thyristor of an even number arranged on the latter stage adjacently to the thyristor emit the light in pairs, and an even number-odd number mode in which the light emitting thyristor of an even number and the light emitting thyristor of an odd number arranged on the latter stage adjacently to the thyristor emit the light in pairs.
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Takeshi Senda
Takefusa Kubo
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