Ink ejection determining device, inkjet printer, storage medium, computer system, and ink ejection determining method

摘要

An ink-ejection-determining device capable of determining with high reliability whether ink has been ejected is to be realized. The device comprises a light emitter capable of emitting light, and a light receptor capable of receiving the light and outputting an output signal corresponding to an amount of the light. According to a change in the output signal caused by the light being blocked by ink ejected from an ink-ejecting portion, a determination is made of whether or not ink has been ejected. If it is determined that ink has not been ejected according to the change in the output signal, after conducting a correction of a gain of the light receptor according to the output signal of the light receptor in order to make the output signal of the light receptor suit the determination of ink ejection, the determination of whether or not ink has been ejected is made again.