Sti Co., Ltd.

Yuhho Cho

Jung Jin Mun

Jinoh Hong

Chan Il Jung

Su Kon Han

An inkjet printing apparatus is provided. The inkjet printing apparatus includes a plurality of nozzles, each of the plurality of nozzles adapted to be controlled to discharge a separated ink quantity mapped to a control value input, a nozzle performance measuring circuit inputting the control value mapped to the separated ink quantity to the each of the plurality of nozzles, and a control circuit calculating a target print ink quantity in case where a reference separated ink quantity is discharged from a plurality of dots on a window and determining the control value of each of the plurality of nozzles. The control circuit may designate one dot in the window as a reference dot and determine the control value of the each of the plurality of nozzles within the window as the reference dot and the window move sequentially within a printing area.

Inkjet printing apparatus

Provided is an inkjet printing method using a plurality of nozzles which are controlled to discharge discrete quantities of ink mapped to a specific control value, of which a control value and discrete quantities of ink are mapped, if the specific control value is inputted, the inkjet printing method including the steps of: inputting a control value mapped to specific discrete quantities of ink to the plurality of nozzles to measure discharge performance of the plurality of nozzles; classifying the plurality of nozzles into a plurality of nozzle groups based on the discharge performance measured on the plurality of nozzles; adjusting a mapped relation between the discrete quantities of ink and the control value for the classified nozzle groups; and performing inkjet printing based on a mapped relation between the discrete quantities of ink and the control value.

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Anseong-si, South Korea

Yuhho Cho