Samsung Electronics Co., Ltd.

Hyun-Ki Cho

Jong-tae Kim

Jong-Woo Kim

Sung-dae Kim

Tae-Hee Kim

Dong-Hoon Han

Jong-woo Kim

Young-dae Ko

Hyung-Won Yoon

Yoon-Hwak Kim

An image forming apparatus may include one or more photosensitive media, a driving unit to rotate the photosensitive media, a detecting unit to detect a rotational state of each of the photosensitive media and a controller to control the driving unit based on the rotational state detected by the detecting unit so that two adjacent photosensitive media stop with a phase angle difference between them that is capable of compensating for image registration errors.

Image forming apparatus and method for controlling the same to compensate for registration errors

An image forming apparatus is configured to reduce a velocity fluctuation of a rotating body by reducing the AC velocity component of the rotating body. The image forming apparatus may include an image bearing body with a surface on which a toner image is formed; a driving motor configured to drive the image bearing body according to an input signal; and a controller configured to control the driving motor to output a motor output velocity at a period equal to that of an AC velocity component of the image bearing body. A velocity control method for the rotating body includes sampling a continuous motor input signal at a period equal to that of an AC velocity component of a rotating velocity of the rotating body. The sampled signal is transmitted to a driving motor that drives the rotating body, which is driven based upon the discrete motor input signal.

Image forming apparatus and velocity control method of rotating body thereof

A printing medium supplying unit comprises a printing medium loading plate configured to move up and down based on an amount of printing medium loaded on the printing medium loading plate and an elevation control unit configured to adjust an elevation height of the printing medium loading plate such that a standby position of the printing medium loading plate can vary based on an amount of the printing medium loaded on the printing medium loading plate, wherein the standby position of the printing medium loading plate is a position in which the printing medium loading plate does not supply the printing medium to an image forming unit.

Printing medium supplying unit and image forming apparatus having the same

Disclosed are a transfer unit and an image forming apparatus having the same. The apparatus can include multiple members configured to carry developer associated with color images. The transfer unit can include multiple rollers each disposed to opposingly face a respective corresponding one of the members, a belt interposed between the rollers and the members, and a device configured to support the rollers. The rollers can include a first roller at one end of the transfer unit, a second roller at an opposite end and one or more middle rollers arranged between the first and second rollers. The device can be configured such that a rotation center of the first roller and a rotation center of the second roller define a first plane and a rotation center of the one or more middle rollers defines a second plane parallel to but not co-planar with the first plane.

Transferring unit and image forming apparatus including the same

An image forming apparatus includes: a photosensitive body; a driver to drive the photosensitive body; a supporting bracket to support the driver; and a heat insulator disposed between the supporting bracket and the driver to shield the photosensitive body from heat generated by the driver.

Image forming apparatus capable of reducing temperature difference of a photosensitive body

A paper feeding apparatus capable of preventing noises generated when picking up and transferring paper, and an image forming apparatus having the same. The paper feeding apparatus according to the present invention comprises a pickup unit, which is disposed upstream of a paper cassette relative to the direction in which the uppermost sheet of paper loaded in the paper cassette moves, to pick up the uppermost sheet of paper, and a lifting unit which lifts the sheet of paper vertically to reduce friction between the paper and the paper beneath it when the pickup unit picks up the sheets of paper.

Growing community of inventors

Hanam-si, South Korea

Hyun-Ki Cho