Abstract: An apparatus and a method recognizing the error of a toner sensor that is capable of correctly recognizing the error factor of the toner sensor for sensing the amount of the toner of a developing device main body. The output value and the set value of the sensor are compared with each other to display the corresponding error code. Therefore, a service engineer or a user easily recognizes the error factor to take proper measures corresponding to the error factor.

Abstract: A multi-pass type color image forming apparatus. The multi-pass type color image forming apparatus includes an indicating member which is provided at a camshaft and has a plurality of indicating portions, a sensing part which detects the plurality of indicating portions, and a control unit which receives a signal from the sensing part when the indicating member passes by the sensing part by the rotation of the camshaft, and determines a home position by a rotational position of the camshaft when a signal pattern from a sequence of signals from the sensing part corresponds with a preset reference pattern. Accordingly, the home position of the camshaft can be determined in a short amount of time regardless of the slip between the cams and the push caps, so that the warm up time can be shortened and the generation time of noise caused by the contact between the cams and the push caps can be minimized.

Abstract: A gasket includes an elastic member absorbing an external shock, a conductive member surrounding the elastic member, and a reinforcing member disposed within the conductive member and extending along a bottom surface and a side surface of the conductive member. A screen spacer includes an elastic member absorbing an external shock, and a reinforcing member disposed on one side of the elastic member. A display device includes a driving circuit substrate supplying a driving signal to a display panel, a chassis receiving the display panel and the gasket attached to the driving circuit substrate and contacting the chassis, the gasket grounding the driving circuit and the chassis.

Abstract: An image printing method of a host apparatus connected to an image forming apparatus, the method includes selecting an image to be successively printed over a plurality of recording pages, disposing the image to be successively printed on at least one of top, bottom, right and left positions of at least one of the plurality of recording pages, generating printing data of the image to be successively printed over the plurality of recording pages, and transmitting the printing data to the image forming apparatus.

Abstract: An image forming apparatus and an image forming method thereof. The image forming apparatus includes an image forming part which forms a color image on a printing medium, a pickup roller which picks up the printing medium, and a controller which controls the pickup roller to try to pick up the printing medium if image forming for a first color among a plurality of colors is completed, and controls the image forming part to form an image corresponding to a second color among the plurality of colors after trying to pick up the printing medium.

Abstract: An image forming device having a plurality of developing units is provided. The image forming device includes a control unit to determine whether to perform an auto color registration (ACR) with respect to one or more of the plurality of developing units, and a print engine unit to perform an ACR of the determined developing units.

Abstract: An image forming device to perform an auto color registration. The image forming device includes a print unit capable of performing a print job in accordance with a plurality of print modes, a color registration processing unit to perform an auto color registration (ACR), a storage unit to store color registration conditions for the respective print modes, and a control unit to control the color registration processing unit to perform the ACR in accordance with the color registration condition corresponding to the present print mode of the print unit. The color registration condition may be at least one of a color registration execution period, a color registration execution time, and a color registration pattern. According to the image forming device, the proper ACR can be performed by print modes.

Abstract: Provided is a method of controlling a fusing speed of an image forming apparatus. Determination is made as to whether a sheet of paper to be printed is a special-purpose sheet. Determination is made as to whether a length 1 of the sheet of paper is shorter than a distance L1 between a second transfer roller and a fusing unit. Determination is also made as to whether the length 1 of the sheet of paper is shorter than a distance L0 between a first transfer roller and the second transfer roller. Determination is made as to whether the length 1 of the sheet of paper is longer than the distance L0 between the first transfer roller and the second transfer roller.

Abstract: An apparatus and a method recognizing the error of a toner sensor that is capable of correctly recognizing the error factor of the toner sensor for sensing the amount of the toner of a developing device main body. The output value and the set value of the sensor are compared with each other to display the corresponding error code. Therefore, a service engineer or a user easily recognizes the error factor to take proper measures corresponding to the error factor.

Abstract: A gasket is interposed between a circuit board that generates electromagnetic waves and a conductive member, and includes an elastic member separating the circuit board from the conductive member. The gasket is electrically connected with the circuit board by a conductive layer to receive the electromagnetic waves from the circuit board. The conductive layer is covered with an insulating layer except for a contact area where the conductive layer is coupled with the circuit board. The insulating layer blocks the electromagnetic waves received from the circuit board. The electromagnetic wave noise of a display apparatus is reduced even if a contact failure occurs between the gasket and a top chassis.

Abstract: A multi-pass type color image forming apparatus. The multi-pass type color image forming apparatus includes an indicating member which is provided at a camshaft and has a plurality of indicating portions, a sensing part which detects the plurality of indicating portions, and a control unit which receives a signal from the sensing part when the indicating member passes by the sensing part by the rotation of the camshaft, and determines a home position by a rotational position of the camshaft when a signal pattern from a sequence of signals from the sensing part corresponds with a preset reference pattern. Accordingly, the home position of the camshaft can be determined in a short amount of time regardless of the slip between the cams and the push caps, so that the warm up time can be shortened and the generation time of noise caused by the contact between the cams and the push caps can be minimized.

Abstract: Provided is a method of controlling a fusing speed of an image forming apparatus. Determination is made as to whether a sheet of paper to be printed is a special-purpose sheet. Determination is made as to whether a length l of the sheet of paper is shorter than a distance L1 between a second transfer roller and a fusing unit. Determination is also made as to whether the length l of the sheet of paper is shorter than a distance L0 between a first transfer roller and the second transfer roller. Determination is made as to whether the length l of the sheet of paper is longer than the distance LO between the first transfer roller and the second transfer roller.