Abstract: An image forming apparatus is provided. The image forming apparatus includes: a plurality of photosensitive drums; a plurality of exposurers exposing some area of surfaces of each of the plurality of photosensitive drums; a plurality of developers disposing a toner in the exposed area on the surfaces of each of the plurality of photosensitive drums; an intermediate transfer belt transferred with the toner disposed on each of the plurality of photosensitive drums to form a pattern; and a processor controlling the plurality of photosensitive drums or the plurality of exposurers to form a printed pattern on the intermediate transfer belt at a predetermined first concentration in response to a print command being input and form a registration pattern on the intermediate transfer belt at a second concentration lower than the first concentration in response to a registration command being input.

Abstract: An image forming apparatus is provided. The image forming apparatus includes: a plurality of photosensitive drums; a plurality of exposurers exposing some area of surfaces of each of the plurality of photosensitive drums; a plurality of developers disposing a toner in the exposed area on the surfaces of each of the plurality of photosensitive drums; an intermediate transfer belt transferred with the toner disposed on each of the plurality of photosensitive drums to form a pattern; and a processor controlling the plurality of photosensitive drums or the plurality of exposurers to form a printed pattern on the intermediate transfer belt at a predetermined first concentration in response to a print command being input and form a registration pattern on the intermediate transfer belt at a second concentration lower than the first concentration in response to a registration command being input.

Abstract: An image forming apparatus includes a charging member configured to charge a photoreceptor, a power supply configured to provide charging power to the charging member, a measurement unit configured to measure a current provided to the charging member, and a controller configured to search for a current saturation point of the charging member using the current value measured by the measurement unit in a state in which fixed direct current (DC) power and varied alternating current (AC) power are supplied to the charging member, and control the power supply to perform a charging operation with only DC power corresponding to the searched current saturation point.

Abstract: An image forming apparatus, a method, and a non-transitory computer-readable recording medium are provided. The apparatus includes an image former configured to form patches for print density calibration on an image forming medium, a print density sensor configured to sense a print density for the plurality of reflective patches formed on the image forming medium, a calculator configured to calculate calibration coefficients of the sensor based on the sensed print densities, and a calibrator configured to perform the print density calibration using the calculated calibration coefficients.

Abstract: A developing device includes a photosensitive member having a surface on which a visible image is formed and a developing member to feed a developer to the photosensitive member, and an image forming apparatus having the developing device. The photosensitive member includes a developing region, to which the developer is transmitted by the developing member, and a transfer region, from which the developer of the photosensitive member is transmitted to a recording medium. A redistributing unit is disposed between the developing region and the transfer region, to redistribute the developer present on the photosensitive member.

Abstract: A developing device includes a photosensitive member having a surface on which a visible image is formed and a developing member to feed a developer to the photosensitive member, and an image forming apparatus having the developing device. The photosensitive member includes a developing region, to which the developer is transmitted by the developing member, and a transfer region, from which the developer of the photosensitive member is transmitted to a recording medium. A redistributing unit is disposed between the developing region and the transfer region, to redistribute the developer present on the photosensitive member.