Abstract: A developing device detachably coupled to an electrophotographic image forming apparatus which includes a housing including a photoconductive drum and at least one roller; and an electrical contact member disposed in the housing, connected to the at least one roller, and formed of a conductive metallic plate to provide an electrical path between the at least one roller and a power supply when the developing device is attached to the electrophotographic image forming apparatus, wherein the electrical contact member includes a base including a coupling unit to engage with the housing, a first elastic member to bend from the base in a first direction; a second elastic member to bend from the first elastic member in a second direction and including a contact to contact the at least one roller; and an anti-deformation unit to bend from the base and to face a surface of the first elastic member in the second direction of the second elastic member to prevent the first elastic member from bending in the second direct

Abstract: A developing device has a housing including a toner container containing toner, and a developing unit. The developing unit includes a developing roller and a photoconductive drum, and a barrier member including a toner supply window. The barrier member is combined with the housing to separate the toner container and the developing unit from each other. The developing unit also includes a blocking film that is attached to the barrier member to block the toner supply window. An end of the blocking film is exposed outside the housing through an opening formed in a sidewall of the housing. A bottom surface and first and second side surfaces of the barrier member are attached to a bottom surface and first and second side surfaces of the housing by using a welding process, and a distance between the first and second side surfaces of the barrier member and a distance between the first and second side surfaces of the housing increase from bottom to top.

Abstract: An image forming apparatus and a control method thereof are disclosed. A charge unit charges a surface of an organic photo conductor (OPC) to a predetermined electric potential. A developing unit develops an electrostatic latent image formed on the surface of the OPC by coating a developer on the same. A power supply unit supplies power to the charge unit and the developing unit. A control unit regulates the power supplied to the charge unit and the developing unit. After a developing process in the developing unit, the control unit regulates the power applied to at least one of the charge unit and the developing unit so as to collect a residual developer on the surface of the OPC to the developing unit. Accordingly, contamination of the charge unit and the transfer unit can be prevented and an image of a good quality can be achieved.

Abstract: An image forming apparatus and a control method thereof are provided. The image forming apparatus includes: an image carrying body which includes a surface on which a developer which corresponds to printing data is applied; a transferring unit which receives transferring electric power to form a transferring area which transfers the developer to a transferring target body; a power supply unit which applies transferring electric power to the transferring unit; and a control unit which controls the power supply unit to apply first transferring electric power or second transferring electric power based on the amount of the developer in a unit section on a surface of the image carrying body. Thus, the present general inventive concept provides an image forming apparatus and a control method thereof for improving a printing image quality.

Abstract: An image forming apparatus having a developing cartridge includes a lower main body, and a developing cartridge installed in the lower main body and including a photosensitive medium. An upper main body may be separably installed on an upper side of the lower main body and includes an upper pressing member to press the developing cartridge downward. A lower pressing member, installed in the lower main body, is positioned to press the developing cartridge upward. In the case where a rotation axis of the photosensitive medium of the developing cartridge is set as a rotation center, a moment of force is applied to the developing cartridge by the upper pressing member and an opposing moment of force being is applied to the developing cartridge by the lower pressing member in the opposite direction.

Abstract: An image forming device, including a charging unit to electrically charge a surface of an organic photoconductive medium; a light exposure unit to form an electrostatic latent image on the surface of the organic photoconductive medium; a developing unit to develop the electrostatic latent image formed with a developer; a transfer roller to transfer an image developed by the developing unit to a recording paper; a light array having a plurality of light sources arranged in a predetermined pattern; a first light path providing unit to form a light path to receive a first light portion emitted from the light sources and to allow the light to be projected on the organic photoconductive medium between the developing unit and the transfer roller; and a second light path providing unit to form a light path to receive a second portion of the light emitted from the light sources and to allow the light to be projected onto the organic photoconductive medium passing through the transfer roller, thereby removing an elect

Abstract: An image-forming apparatus including a valid signal generator to input print data and a video clock to synchronize the print data, and generate binary image data, a pixel counter to calculate the number of pixels of the print data based on the binary image data, a data stream counter to calculate the number of particular data streams of the binary image data, a coefficient memory to store coefficients with respect to average toner consumption amounts per pixel, a weight memory to store a lookup table containing weights corresponding to percentages of the number of pixels to the particular data streams, and a controller to calculate a percentage of the number of pixels to the number of particular data streams to read out a weight, and calculate the consumed amount of toner by use of the read weight, the number of pixels, and a toner consumption amount coefficient.

Abstract: A setting parameter modifying apparatus, the apparatus including a developing cartridge, containing consumables having certain characteristics, detachably installed in a main body of an image forming apparatus, containing a constituent element to operate on the consumables; and a setting parameter modifying element, installed on the developing cartridge, to modify setting parameters of the constituent element of the image forming apparatus such that the constituent element operates on the consumables according to the characteristics thereof.

Abstract: A toner consumption measuring apparatus having an effective signal generating unit to receive inputs of printing data and a video clock signal to synchronize the printing data and to generate a count effective signal, a counting unit to count the generated count effective signal and to calculate a number of pixels of the printing data, a coefficient memory to store at least a toner consumption coefficient of a unit of pixel ‘K’ which is set in advance, and a printer control unit to determine an image pattern compensation coefficient by using the differences of numbers of the pixels of adjacent lines of a page in printing of every page, and calculating a toner consumption with applying a proper weight in accordance with the determined image pattern compensation coefficient.

Abstract: An image forming apparatus periodically cleans print units used for printing. The image forming apparatus comprises a print part that prints by using a replaceable print unit, a memory that stores information regarding a condition for cleaning with respect to the print unit, a status detection part that detects an operational status of the print unit, and a controller that controls the print part to clean the print unit if the operational status detected by the status detection part satisfies the condition for cleaning. The print part supplies a printing paper and transfers a foreign substance left on a surface of the print unit to the printing paper, thereby cleaning the print unit. Accordingly, print quality does not deteriorate.

Abstract: An image-forming apparatus including a valid signal generator to input print data and a video clock to synchronize the print data, and generate binary image data, a pixel counter to calculate the number of pixels of the print data based on the binary image data, a data stream counter to calculate the number of particular data streams of the binary image data, a coefficient memory to store coefficients with respect to average toner consumption amounts per pixel, a weight memory to store a lookup table containing weights corresponding to percentages of the number of pixels to the particular data streams, and a controller to calculate a percentage of the number of pixels to the number of particular data streams to read out a weight, and calculate the consumed amount of toner by use of the read weight, the number of pixels, and a toner consumption amount coefficient.

Abstract: A toner consumption measuring apparatus having an effective signal generating unit to receive inputs of printing data and a video clock signal ‘VCLK’ to synchronize the printing data, and generating a count effective signal; a counting unit to count the generated count effective signal and to calculate a number of pixels of the printing data; a coefficient memory to store at least a toner consumption coefficient of a unit of pixel ‘K’ which is set in advance; and a printer control unit to determine an image pattern compensation coefficient by using the differences of numbers of the pixels of adjacent lines of a page in printing of every page, and calculating a toner consumption with applying a proper weight in accordance with the determined image pattern compensation coefficient.

Abstract: An image forming device, including a charging unit to electrically charge a surface of an organic photoconductive medium; a light exposure unit to form an electrostatic latent image on the surface of the organic photoconductive medium; a developing unit to develop the electrostatic latent image formed with a developer; a transfer roller to transfer an image developed by the developing unit to a recording paper; a light array having a plurality of light sources arranged in a predetermined pattern; a first light path providing unit to form a light path to receive a first light portion emitted from the light sources and to allow the light to be projected on the organic photoconductive medium between the developing unit and the transfer roller; and a second light path providing unit to form a light path to receive a second portion of the light emitted from the light sources and to allow the light to be projected onto the organic photoconductive medium passing through the transfer roller, thereby removing an elect

Abstract: A method and apparatus for enhancing a transfer efficiency of electronic photograph development equipment, which enhances the transfer efficiency by controlling a transfer voltage output from a transfer voltage output end by a pulse width modulation command under the control of a microcomputer based on a transfer environment and a paper sheet recognition of the electronic photograph development equipment.