Samsung Electronics Co., Ltd.

Hp Printing Korea Co., Ltd.

Soo-yong Kim

Byeong-hwa Ahn

Young-Hoon Lee

Gi-cheol Jeong

Bo-min Hwang

Byung-sun Ahn

Sung-dae Kim

Kyung-shig Chung

Il-kwon Kang

Tae-il Jung

Seok-Min Yun

Pil-seung Oh

Kitano Toshiaki

Kyung-Shig Chung

Byung-Sun Ahn

Byeong-Hwa Ahn

Gi-Cheol Jeong

A power transmitting apparatus includes a shaft, first and second passive members mounted on the shaft to be rotatable, and a driving member that is mounted on the shaft and rotates in connection with a driving source, and that according to a rotation direction, slides toward the first and second passive members along the shaft, so as to selectively establish a power connection with the first and second passive members.

Power transmitting apparatus and image forming apparatus implementing the same

A method of controlling a servo in an optical disc device and a servo control device using the method, in which the servo control device controls a servo for printing on a label surface of an optical disc and includes an optical pickup unit, an error signal generation unit, and a control unit. The optical pickup unit outputs a plurality of signals corresponding to a position of an object lens in response to light reflected from the label surface. The error signal generation unit outputs an error signal by selecting or combining one or more of the plurality of signals. The control unit adjusts the position of the object lens in response to the error signal. Therefore, because the position of the object lens can be adjusted with an increased range, the spot size of a beam condensed by the object lens can be adjusted within an increased range, and a data recording time can be reduced. Moreover, data retention characteristics and recording quality can be improved.

Method of controlling servo in optical disc device and servo control device using the same

A method of controlling recording of an optical disc device and an optical disc device using the method. The optical disc device performs recording of data on a labeled surface of the optical disc. The device includes a buffer memory, a record unit and a controller. The buffer memory stores data and the record unit records data on the labeled surface of the optical disc from the buffer memory. The controller controls the record unit such that when a recording error occurs, the recording is stopped and when the error is corrected, data is recorded from a stopped position.

Method of controlling recording of optical disc device and optical disc device using the method

An image forming apparatus includes a developing unit to form an image using a developing agent on one side of a printing medium transported along a simplex printing path, a fixing unit to fix the developing agent on the printing medium, a discharging roller to discharge the printing medium that passes the fixing unit, and a first driving source to drive the developing unit, the fixing unit and the discharging roller.

Image forming apparatus having controller to selectively control plurality of driving sources

A tandem color image forming apparatus includes a plurality of photosensitive bodies driven by one driving source and having a shaft gear, and power transmission members engaged with the shaft gears of the plurality of the photosensitive bodies to transmit a driving force generated from the driving source to each of the plurality of the photosensitive bodies. At least one color registration compensation unit is disposed between the power transmission members. The color image forming apparatus employs the color registration compensation unit so that each photosensitive body can be synchronized and registration errors can be minimized.

Color image forming apparatus with color registration compensation unit

A developing unit and an image forming apparatus having the developing unit are disclosed. The developing unit includes a developing unit main body having a supporting groove that contacts and is supported by the supporting protrusion of a frame when the developing unit is mounted on the mounting frame. A photoconductor is rotatably disposed in the developing unit main body and has ends that form a supporting shaft and are supported by a supporting unit. A driven unit is disposed in the developing unit main body and geared with the driving unit when the developing unit main body is mounted on the mounting frame. One of side surfaces of the developing unit main body includes an interference unit that interferes with the mounting frame and push the developing unit main body into engagement with the driving gear when the developing main body is mounted on the mounting frame.

Developing unit and an image forming apparatus including the developing unit

A method of determining a recording power for a recordable optical disk in an optical disk system is provided. The method is capable of minimizing the time taken to determine an optimum recording power for each recording speed and thus improve recording performance.

Method of determining recording power for recordable optical disk in optical disk system

An optical disc system and a method of managing shock while recording or playing data in the optical disc system are provided. The optical disc system includes an optical pick-up unit for applying a laser beam to a track of an optical disc and detecting reflected light, a servo unit for controlling tracking and focus of the optical pick-up unit and a monitoring unit for comparing a monitoring signal, which is output from the optical pick-up unit and the servo unit, with a reference signal and generating a blocking signal and a blocking release signal. Recording or playing of data on the optical disc is stopped in response to the blocking signal, and recording or playing of the data on the optical disc is resumed in response to the blocking release signal based on a state of the optical disc system when recording or playing was stopped.

Optical disc system and method for managing shock during data record/play

An image forming apparatus includes plurality image carriers sequentially arranged, a conveying belt, which conveys a print medium onto which color-separated images formed on the plurality of image carriers are overlapped, and a plurality of image transfer rollers installed to respectively correspond to the plurality image carriers. The conveying belt is interposed between the image transfer rollers and the image carriers. At least one of the plurality image transfer rollers is arranged to be compressed with a pressure higher than those applied to the other image transfer rollers against the image carriers.

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Seoul, South Korea

Soo-yong Kim