Abstract: An apparatus and method are disclosed for measuring the quantity of residual toner contained in a toner cartridge, and an image forming apparatus having such a device. The inventive device for measuring the quantity of residual toner comprises a controller and a residual toner data memory. The controller selects one of a plurality of preset values for one or more correction coefficients weighted depending on the length of time the toner cartridge has been in printing service, and calculates the quantity of residual toner using the selected value for each correction coefficient and the number of counted dots of a print data. The residual toner memory stores the quantity of residual toner calculated and updated by the controller. According to one exemplary embodiment, the quantity of residual toner can be calculated close to actual value by applying appropriately weighted coefficients.

Abstract: A driving method of an electrophotographic type image forming apparatus is provided. The method includes forming an electrostatic latent image by operating a photoconductor and an exposure unit, developing the electrostatic latent image by operating a developing unit, and transferring the developed image to a paper, wherein the operation of the developing unit is stopped after a tail end of the electrostatic latent image passes through the developing nip. In addition, the operation of the developing unit is started at a predetermined time between the time when the paper begins to be transmitted and the time when a leading end of the electrostatic latent image reaches the developing nip.

Abstract: A method and apparatus for efficiently scanning a duplex document in which a scan unit sequentially scans both sides of a sheet of a duplex document by moving the sheet across a reader, and a reverse output unit to output the sheet after turning over the sheet. Therefore, since the sheet of a document can be fed and scanned while the second side of the previous sheet of the document is scanned, scanning time can be reduced. Particularly, the reduction in scanning time is very useful when multiple sheets of a duplex document need to be scanned.

Abstract: Low molecular weight conjugated nitrogen compounds having linear conjugated chains, and devices fabricated using the conjugated nitrogen compounds as organic semiconductor materials, hole conducting materials, or light-emitting materials. The conjugated nitrogen compounds can be spin-coated at room temperature, are stable, and has superior electrical conductivity.

Abstract: Disclosed herein is a nano- or micro-scale organic-inorganic composite device and a method for producing the same. The nano- or micro-scale organic-inorganic composite device includes a first electrode, a second electrode, and a photoactive layer formed of a fullerene-conducting polymer composite interposed between opposing surfaces of the first electrode and the second electrode, and a method of producing a nano- or micro-scale organic-inorganic composite device capable of mass production of the nano- or micro-scale organic-inorganic composite device, by producing an integrated structure of nano- or micro-scale organic-inorganic composite devices of a uniform size and quality using a porous template, where each device includes a first and second electrode, and a photoactive layer.

Abstract: An image forming apparatus includes an image forming body, a locking unit blocking movement of at least one movable object of the image forming body, and a control unit controlling a locking state of the locking unit and a releasing state of the locking unit. The locking unit includes a latching member provided on one of the at least one movable object and provided with a latching depression, a supporting member provided on the image forming body, and a locking member movably supported by the supporting member so as to be insertable into and removable from the latching depression of the latching member.

Abstract: Disclosed herein are a polymer solar cell, comprising a substrate, a first electrode, a hole injection layer, a photoactive layer, and a second electrode, characterized in that an electron-accepting layer is formed between the photoactive layer and the second electrode, and a method of manufacturing the polymer solar cell. The polymer solar cell comprises an electron-accepting layer between the photoactive layer and the second electrode, thereby assuring excellent power conversion efficiency. Furthermore, high power conversion efficiency can also be attained in a low-temperature thermal annealing process.

Abstract: A dye-sensitized solar cell using an ion-bound oligomer complex is provided. The dye-sensitized solar cell comprises an electrolyte, comprising a first oligomer having a C5-30 heteroaryl group containing a nitrogen heteroatom as a basic functional group at both ends of the molecule, mixed with a second oligomer having an acidic functional group selected from among carboxylic acid, phosphoric acid, and sulfonic acid, at both ends of the molecule, to thus form a salt, which then leads to an ion-bound oligomer complex that constitutes the electrolyte. The solar cell exhibits excellent mechanical properties, can be manufactured conveniently, and can have a high energy conversion efficiency.

Abstract: An image reading apparatus and an image forming apparatus including the same to improve a transferring path of a document to prevent curl from being generated in the document and to prevent interference between a document having both surfaces scanned and a previously discharged document. The image reading apparatus includes a scan path having one end connected to a document supplying unit and the other end connected to a document discharging unit, a scan unit to read information recorded on a document passing through the scan path, a two-sided document branch path to branch from the scan path so that the document whose first surface is scanned by the scan unit passes through the two-sided document branch path before the document is reversed for a two-side scanning process, and a two-sided document transferring path having one end connected to the two-sided document branch path and other end connected to the scan path.

Abstract: An image forming apparatus is provided. The apparatus includes a mainboard on which a reader is integrally installed, and a RFID (radio frequency identification) tag is installed on a cartridge within a distance capable of radio communication with the reader. Therefore, the image forming apparatus is designed such that the reader acting as a radio communication device is integrally formed on the mainboard, such that a cable connecting the reader and the mainboard is not required, and noise resulting from the cable can be prevented.

Abstract: An improved image forming apparatus comprises a first developing unit comprising a photosensitive body. Also provided is a second developing unit including a developing roller which is moveably installed so that the developing roller selectively contacts the photosensitive body. A pressing member selectively presses the second developing unit. The developing roller contacts the photosensitive body during a developing process and separates from the photosensitive body after the developing process is finished.

Abstract: An electrophotographic image forming apparatus may include a developing unit installed above a photosensitive drum, a pickup roller installed above a photosensitive drum to draw a sheet of paper from a paper feed cassette, and a paper transportation path extended below from the pickup roller. An exposure unit and the paper transportation path are installed in rear and front sides of a housing, respectively, to interpose the developing unit therebetween. The developing unit includes a developing roller and a toner container extended above from a front end of a bottom of the housing, the toner container having a height longer than a width.

Abstract: An image forming apparatus includes at least two radio frequency identification (RFID) tags, an interrogator activating the RFID tags and sequentially receives tag information from the RFID tags according to the priority orders of the RFID tags, and a controller controlling the operation of the interrogator. Tag information of a plurality of RFID tags can be received by a single reader (interrogator). In other words, radio communication can be achieved without a plurality of readers, thereby reducing the material costs.

Abstract: Disclosed herein are a novel dye for a photoelectric device and a photoelectric device comprising the dye. More particularly, the dye for a photoelectric device incorporates different quaternary ammoniums into a carboxyl or phosphoric acid-substituted bipyridyl ligand of the dye, and a photoelectric device comprising the same. The dye for a photoelectric device as disclosed herein exhibits improved photosensitivity and light absorbing characteristics, thereby making it possible to fabricate a highly efficient photoelectric device when the dye is included in the device.

Abstract: Disclosed is a novel dye for use in a photoelectronic device, wherein the photoelectronic device is comprised of a photoanode comprising the dye. According to the novel dye, the dye is derived through the introduction of a group which narrows the dihedral angle of the dye ligand as well as through the introduction of conjugated groups. Since the dye has improved light sensitivity and absorption properties, it can be used to fabricate a photoelectronic device with high power conversion efficiency.

Abstract: Low molecular weight conjugated nitrogen compounds having linear conjugated chains, and devices fabricated using the conjugated nitrogen compounds as organic semiconductor materials, hole conducting materials, or light-emitting materials. The conjugated nitrogen compounds can be spin-coated at room temperature, are stable, and has superior electrical conductivity.

Abstract: Disclosed herein is a photovoltaic cell using catalyst-supported carbon nanotubes and a method for producing the same. More particularly, the photovoltaic cell includes a photo anode, a cathode including a layer of metal catalyst particle supporting carbon nanotubes, and an electrolyte disposed between the photo anode and the cathode. The photovoltaic cell is economic in terms of production costs and process steps, and shows improved catalytic activity due to an enlarged contact area and conductivity, resulting in excellent photoelectric efficiency.

Abstract: An image forming apparatus including a first driving section having a feed mechanism and a printer engine, a second driving section having a delivery mechanism, a first motor, a second motor, and a controller. The first and second motors drive the first and second driving sections, respectively. The power supplied to one of the first and second motors having a higher output is cut off earlier by a predetermined compensation time as compared to the other motor having a lower output. The compensation time is equal to or shorter than the difference |T1?T2| between a first stop time T1 required to actually stop the first motor after cut-off of the power supplied to the first motor and a second stop time T2 required to actually stop the second motor after cut-off of the power supplied to the second motor.

Abstract: A cover unit of a substrate for an image forming apparatus and method. The apparatus and method include a first cover unit and a second cover unit. The first cover unit surrounds the substrate on which electronic elements of a main body of the image forming apparatus are mounted, and the second cover unit is provided outside the first cover unit. The first cover unit is formed using an insulator, and the second cover unit is formed using a conductor. The cover unit of the substrate does not require an insulating sheet, and thus the cover unit of the substrate can be formed with a compact structure.

Abstract: A method for generating driver assistance information of a traveling vehicle. The method can restructure traveling environments into an image based on a sensor system capable of removing blind spots around a traveling vehicle, and a scheme capable of exactly detecting a lane and a vehicle, and give a collision warning when there is a possibility of collision. Further, the method integrates recognition results of front/rear vehicles based on a lane recognition method applicable to various road environments, including the shape, curvature and loss of a lane, improves the stability of lane recognition, and distinguishes a solid line from a dot line, so it is possible to provide a driver with the subdivided degrees of danger. In addition, when a vehicle deviates from a lane, a voice warning may be output and the position of the vehicle for a road is restructured as an image.