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| Number | Title | Issue Date |
| 8068751 | Image forming apparatus An image forming apparatus that can improve image quality by correcting for variations in the potential characteristics of a photosensitive member and enhance the responsiveness of an image forming operation. The photosensitive member is rotated by a drive unit and ... | 11/29/2011 |
| 8041241 | Image forming apparatus and image forming method which controls the exposing of an image carrier to change the exposure time period in the main scanning direction In a disclosed image forming apparatus, a developing bias applied to a developer carrier or exposure energy with which an image carrier is exposed is adjusted such that an isolated one-dot image on the image carrier has a predetermined image density. When the image ... | 10/18/2011 |
| 8032041 | Image forming apparatus A pair of registration rollers are provided upstream in a paper transport path from an image forming position, and a paper transport position detection portion is provided upstream in the paper transport path from the pair of registration rollers. When consecutive p... | 10/04/2011 |
| 7945179 | Driving method for light-emitting elements A light-emitting device includes: a plurality of light-emitting elements that emit light in response to driving signals; a control unit that adjusts the timings at which the driving signals are supplied to a plurality of blocks each composed of one or more light-emi... | 05/17/2011 |
| 7826757 | Image forming apparatus An image forming apparatus includes an exposure area controller for controlling an exposure area per pixel of an exposure device on the basis of image information and a switching device for switching an amount of exposure so as to decrease an exposure intensity of t... | 11/02/2010 |
| 7778562 | Exposure head controller, exposure head and image formation device Provided is an exposure head controller that controls, via pulse width modulation control, the emission quantity of each light emitting element in an exposure head having a light emitting element array formed by arranging a plurality of light emitting elements in a ... | 08/17/2010 |
| 7444094 | Image forming device and method capable of high quality duplex printing An image forming device and method in which, when double-sided printing is carried out, placing an image of a first side and an image of a second side at a position determined in accordance with the position of the image of the first side; if it is judged a predeter... | 10/28/2008 |
| 7433616 | Image forming apparatus including a controlling section There is disclosed an image forming apparatus includes an image bearing member; a charging device to charge the image bearing member; an exposing device to form a latent image on the image bearing member; a developing device to form a toner image on the image bearin... | 10/07/2008 |
| 7433615 | Method of and image forming apparatus for controlling a light exposure condition An image forming apparatus, incorporating a process cartridge, capable of determining optimum light exposure conditions suitable for both a charging potential and a film thickness of image bearing member, and performing the image formation even during the period fro... | 10/07/2008 |
| 7412177 | Image forming apparatus An image forming apparatus has a latent image writing device that writes an electrostatic latent image on an image bearing member, a developing device that develops a toner image based on the electrostatic latent image, a transferring device that transfers the toner... | 08/12/2008 |
| 7398025 | White vector feedback adjustment Control circuitry associated with an electrophotographic imaging device is adapted to operate in conjunction with a sensor to adjust a difference in electrical bias between a photoconductive surface and an associated roller. The sensor detects a reflectance or lumin... | 07/08/2008 |
| 7394999 | Image forming apparatus and image control method for controlling image density An image forming apparatus includes devises for performing a detection method which detects an image characteristic of an image formed on an image bearing member; a first control method which controls a toner concentration in a developer, based on a detection result... | 07/01/2008 |
| 7382387 | Image forming apparatus and image density correction device An image forming apparatus, having a submodule that causes non-uniformity in density in a slow-scanning direction in accordance with rotation, includes a correction image forming unit that forms an image for density correction, in cooperation with the submodule, a d... | 06/03/2008 |
| 7382994 | Background energy density control in an electrophotographic device Control circuitry associated with an electrophotographic imaging device is adapted to manage bias levels of components in an image forming unit. A photoconductive surface is charged to a first bias level, a developer member is charged to a second bias level, and an ... | 06/03/2008 |
| 7379682 | Optimization of operating parameters, including imaging power, in an electrophotographic device Control circuitry associated with an electrophotographic imaging device is adapted to operate in conjunction with a sensor to adjust operating parameters, including an imaging power. The sensor detects a reflectivity of a developed image and the control circuitry us... | 05/27/2008 |
| 7379681 | Image forming apparatus and control method thereof Image forming apparatus in which surface electric potentials of a plurality of surface areas are detected by charging a photoconductor with a different applied bias for each predetermined timing and exposing a plurality of surface areas of the photoconductor by scan... | 05/27/2008 |
| 7343112 | Image forming apparatus using hypochromatic toner and hyperchromatic toner The image forming apparatus has an image forming portion capable of forming an image on a transferring medium by the use of a hypochromatic toner and a hyperchromatic toner of substantially the same color. The image forming portion is provided with a developing devi... | 03/11/2008 |
| 7333742 | Image forming apparatus with switched-potential responsive to attenuation of a remaining voltage An image forming apparatus changes over an electric potential on an image bearing member in response to an attenuation region in which a remaining potential on a developing member is attenuating after a developing bias applied to the developing member has been turne... | 02/19/2008 |
| 7324768 | Method and device for determining one or more operating points in an image forming device Methods and devices for setting an operating point within an image forming device. The operating point for one or more image forming stations may be determined without performing a toner patch sensing procedure. The operating points are determined based on other inf... | 01/29/2008 |
| 7320850 | Magenta toner A magenta toner is provided which contains at least a binder resin, a colorant, and a wax, in which a maximum heat-absorption peak temperature as measured using a differential scanning calorimeter, a reflectance at a predetermined wavelength when measured in a powde... | 01/22/2008 |
| 7315712 | Electrophotographic image recording apparatus and method therefore In an electrophotographic image recording apparatus apparatus including a photoconductive image bearing member, a charging apparatus for uniformly charging the image bearing member, an exposure apparatus for effecting an imagewise exposure on a surface of the image ... | 01/01/2008 |
| 7315137 | Method and apparatus for a CCFL driving device A driving device is provided for a cathode fluorescent lamp (CCFL) circuit, comprising a voltage generator outputting a driving voltage and a controller coupled thereto. The controller directs the voltage generator to output a first voltage exceeding a working volta... | 01/01/2008 |
| 7308213 | Intermediate transfer belt having reference position mark In an image-forming apparatus having a photosensitive body and an intermediate transfer belt, the intermediate transfer belt is extendible/contractible in a longitudinal direction and a toner image formed on the photosensitive body transferred onto the intermediate ... | 12/11/2007 |
| 7306216 | Power transmitting apparatus, power switching apparatus, and driving apparatus of multi-function machine using the same A driving apparatus of a multi-function machine includes a scanner unit scanning data recorded on a sheet of document and a document transport part to transport the sheet of document. A printer unit prints data on a sheet of paper for an output and includes a carrie... | 12/11/2007 |
| 7304660 | Optical beam scanning device and diaphragm device capable of adjusting light quantity distribution An optical beam scanning device of the present invention has a light source, a deflection reflecting surface for deflecting to scan light from the light source on a recording medium, and a diaphragm device which is provided between the light source and the deflectio... | 12/04/2007 |
| 7305193 | Image forming apparatus with operation modes An image forming apparatus is provided which can form an image without defective transfer even if a resistance value of a transfer device is so high that defective transfer tends to occur. Before starting operation of printing an image on a sheet, a transfer current... | 12/04/2007 |
| 7292106 | Phase-locked loop with conditioned charge pump output A phase-locked loop system configured to cause an output signal to tend toward a desired output frequency. The phase-locked loop system includes a charge pump system configured to produce a charge pump output based on differences detected between the output signal a... | 11/06/2007 |
| 7288356 | Toner kit, deep-color cyan toner, pale-color cyan toner, and image forming method The present invention provides: a toner kit having a deep toner and a pale toner which are separated from each other, wherein: the deep toner and the pale toner satisfy prescribed conditions for an L*a*b* color coordinate system where a* represents a hue in the red-... | 10/30/2007 |
| 7277649 | Developing apparatus and image forming method A developing apparatus for developing an electrostatic image with light chromatic toner and dark chromatic toner which have the same hue, the developing device includes a light color developing device for accommodating a developer containing the light chromatic tone... | 10/02/2007 |
| 7263321 | Image forming apparatus with speed detector for detecting rotational speed of a tension roller Disclosed is an image forming apparatus, which comprises an intermediate transfer belt (15), and a plurality of image-forming units (11) to (14) disposed along the intermediate transfer belt (15) and adapted to form toner images of differ... | 08/28/2007 |
| 7259896 | Office automation apparatus with calibration and positioning device for automatic document feeder An office automation apparatus with calibration and positioning device includes a body with an optical module, an automatic document feeder (ADF) arranged at the body and a home pattern having both positioning and calibrating functions and placed below the automatic... | 08/21/2007 |
| 7257339 | Method and apparatus for image forming capable of effectively reducing unevenness of density and color displacement of images An image forming apparatus including an image carrying member, a transfer member, support rollers, a detecting mechanism, and a controller. The image carrying member forms a toner image on its surface facing a surface of the transfer member, supported by the support... | 08/14/2007 |
| 7251057 | Digital camera A digital camera includes a CCD imager. When a display-use UYV signal is generated on the basis of an RGB signal of an object image photographed by the CCD imager, a CPU detects a color saturation degree of the RGB signal and reduces dynamic range of a U signal and ... | 07/31/2007 |
| 7242883 | Image formation apparatus having exposure timing control An image formation apparatus is disclosed, wherein temperatures of two or more places on a transfer/conveyance belt are measured. Timing of writing to photo conductor drums based on pixel clock signals is controlled in reference to differences between the measured t... | 07/10/2007 |
| 7236270 | Method of setting reference data of shading corrections, and image reading apparatus A white reference image is inputted to an image sensor with a light source lit up, and white reference data is set every effective photosensor element by inspecting the output signals of the image sensor as to the white reference image (steps S305 and S310... | 06/26/2007 |
| 7233418 | Calibration method for quick scanning starts A method for calibrating a scanner that allows the scan to start quickly. ... | 06/19/2007 |
| 7221894 | Image forming apparatus which prevents misregistration To provide an image forming apparatus including a first image bearing member, first toner image forming means which forms a first toner image on the first image bearing member, an intermediate transfer member in which a circumferential face is formed, the circumfere... | 05/22/2007 |
| 7206531 | Image forming apparatus and method using light and dark toners of the same hue An image forming apparatus includes an image forming section for forming a toner image using light color toner and dark color toner, which have the same hues and which have different densities. A detecting section detects a density of a toner image which is formed f... | 04/17/2007 |
| 7197256 | Image forming apparatus with transfer belt speed control An image forming apparatus is disclosed that is capable of automatically acquiring thickness variation data of a transfer belt newly installed in the image forming apparatus without manual operation of setting the thickness variation data, and capable of controlling... | 03/27/2007 |
| 7197255 | Image forming apparatus and method for controlling an image forming operation of primarily transferring an image onto an intermediate transfer member An image forming apparatus which is capable of reducing a color misalignment in a color overlapping process, and a color misalignment due to variation of the circumferential length of an intermediate transfer member due to an environmental change over time during a ... | 03/27/2007 |
