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| Number | Title | Issue Date |
| 8169458 | Optical scanning device and image forming apparatus An optical scanning device includes an optical housing in which a polygon mirror that is rotated by a motor is accommodated and an air inlet that includes a filter. An airflow guiding member is arranged at a position opposite to a surface of the polygon mirror on th... | 05/01/2012 |
| 8120634 | Image forming apparatus, image forming method and data control device The apparatus is adapted to deflect a light beam from a laser light source for each of the color components by means of a deflection mirror surface which oscillates, thereby making the light beam reciprocally scan in a main scanning direction. In this apparatus, how... | 02/21/2012 |
| 8111276 | Optical scanning device and image forming apparatus with a center adjusting mechanism An optical scanning device deflects a light beam emitted from a light source device by a vibrating mirror, scans a scanning surface with deflected light beam, and focuses the light beam onto the scanning surface by a scanning imaging optical system. The optical scan... | 02/07/2012 |
| 8102411 | Optical scanner and image forming apparatus An optical scanner includes a housing and an intermediate member that includes a first joining surface and a second joining surface. The first joining surface is attached to the housing and the second joining surface is attached to at least one optical element of an... | 01/24/2012 |
| 8054327 | Optical scanning device and image forming apparatus using the same An optical deflector of the present invention includes a movable mirror and torsion bars supporting the mirror and formed integrally with the mirror. The mirror reciprocatingly vibrates to reflect a light beam to thereby deflect it. The mirror is curved in the form ... | 11/08/2011 |
| 8035678 | Light scanning apparatus and scanning type image display apparatus A compact light scanning apparatus is disclosed which can provide a high light scanning efficiency. The apparatus includes a scanner that scans a light beam from a light source to form an image in an effective scan area, and a light detector that detects light. The ... | 10/11/2011 |
| 8009342 | Optical scanning device, image forming apparatus, and controlling method An optical scanning device includes a vertical cavity surface emitting laser, a driving unit that controls modulation driving, a coupling optical system that couples a beam, an aperture that is configured to define a beam spot diameter, a deflecting unit that deflec... | 08/30/2011 |
| 7969634 | Optical scanning device and image forming apparatus An optical scanning device includes a light source, a deflector, and an image-forming optical system. The deflector includes a deflecting surface for deflecting light beams in a main scanning direction. The image-forming optical system includes two relay lenses havi... | 06/28/2011 |
| 7961210 | Optical scanner used in color image-forming device An optical scanner used for an image-forming device to form a color image includes a plurality of photosensitive drums for superimposing a developer image formed on each of the plurality of photosensitive drums. The optical scanner includes a casing, a plurality of ... | 06/14/2011 |
| 7944463 | Light scanning apparatus, image forming apparatus equipped with such light scanning apparatus, and control method or image forming method for such image forming apparatus An image forming apparatus, includes: a latent image carrier whose surface includes an effective image region spanning across a predetermined width in a main scanning direction and is driven in a sub scanning direction approximately orthogonal to the main scanning d... | 05/17/2011 |
| 7920156 | Image forming apparatus, image forming method and data control device The apparatus is adapted to deflect a light beam from a laser light source for each of the color components by means of a deflection mirror surface which oscillates, thereby making the light beam reciprocally scan in a main scanning direction. In this apparatus, how... | 04/05/2011 |
| 7852365 | Optical scanning apparatus and color image forming apparatus An optical scanning apparatus includes light source units; a deflecting unit, incident optical systems provided so as to correspond to the light source units, and at least one synchronous detection optical system that controls a timing at which the light beams form ... | 12/14/2010 |
| 7843481 | Light scanning device capable of producing non-coplanar scanning lines An image forming apparatus having improved arrangement of photosensitive members and configuration of a light scanning device to enable size reduction is described. The image forming apparatus includes a plurality of photosensitive members, a light scanning device t... | 11/30/2010 |
| 7834901 | Image forming apparatus which executes an image quality control The present invention uses a pattern that enables image quality maintaining control to be performed at a resolution lower than that used for a normal image forming process. Thus, during an initial operation upon power-on, the image quality maintaining control is per... | 11/16/2010 |
| 7825947 | Optical scanning device and image forming apparatus using the same An optical scanning device in which an optical deflector scanningly deflects a light beam emitted from a light source and in which an imaging optical system images the scanningly deflected light beam onto a scan surface. The imaging optical system includes a transmi... | 11/02/2010 |
| 7817178 | Thermal compensation of bi-directional alignment in a bi-directional laser scanning unit Methods and apparatus include improving print quality of a bi-directionally scanning electrophotographic (EP) device, such as a laser printer or copy machine, according to temperature. A moving galvanometer or oscillator reflects a laser beam to create forward and r... | 10/19/2010 |
| 7817179 | Methods and apparatus for storing alignment information in a bi-directionally scanning electrophotographic device In a bi-directionally scanning electrophotographic (EP) device, methods and apparatus include storing alignment information. In one aspect, pre-characterization parameters of the EP device are stored in memory, such as NVRAM, resistant to the removal of power. In an... | 10/19/2010 |
| 7800640 | Obtaining pressure of an operating environment of a bi-directionally scanning electrophotographic device for implementing corrections per pressure Methods and apparatus include improving print quality of a bi-directionally scanning electrophotographic (EP) device, such as a laser printer or copy machine, according to ambient pressure in which operated. A moving galvanometer or oscillator reflects a laser beam ... | 09/21/2010 |
| 7773280 | Optical scanning device and image forming apparatus A disclosed optical scanning device includes: a light source unit having plural luminous sources; a light source driving unit modulating each luminous source in accordance with pixel information; an oscillating mirror supported on a twist beam as a rotation shaft, t... | 08/10/2010 |
| 7760227 | Deflector, optical scanning unit, and image forming apparatus A deflector includes a vibrating mirror supported by a torsion beam provided as a rotational axis and reciprocally scanning a beam from a light emitting source; and a rotational part configured to give a rotational torque to the vibrating mirror for making oscillati... | 07/20/2010 |
| 7705872 | Optical writing device and image forming apparatus An optical writing device includes a dichroic mirror and a deflection beam splitter. The dichroic mirror causes a light beam to pass therethrough or reflect depending on the wavelengths of the light beam. The deflection beam splitter causes a light beam to pass ther... | 04/27/2010 |
| 7697023 | Image forming apparatus To provide an image forming apparatus suppressing color slippage without using a mirror with high flatness, when a reflective surface of the mirror used in an optical system of, for example, yellow is formed in a completely flat surface, and a curvature R of the ref... | 04/13/2010 |
| 7649663 | Optical beam scanning device restraining beam position error due to temperature change with diffraction grating and image forming apparatus using the same A technique is provided which enables proper correction of optical characteristics in accordance with change in ambient temperature. An optical beam scanning device capable of causing a luminous flux from a light source to scan a photoconductive surface of ea... | 01/19/2010 |
| 7643193 | Optical scanning apparatus and image forming apparatus An optical scanning apparatus includes a light source, a light source driving unit that turns on the light source according to image information, a deflector that deflects and scans a light beam emitted from the light source according to sinusoidal vibration, and a ... | 01/05/2010 |
| 7639274 | Image forming apparatus with exposure units using oscillation mirrors and method for controlling drive frequencies of the oscillation mirrors In an image forming apparatus including plural exposure units each deflecting a light beam from a light source by means of an oscillation mirror in resonant oscillations and scanning the deflected light beam on a latent image carrier thereby forming a latent image o... | 12/29/2009 |
| 7636101 | MEMS scanner adapted to a laser printer An electrophotographic printer includes an exposure unit having a MEMS scanner operable to scan a beam of light across a photoconductor. The MEMS scanner includes a mirror having an aspect ratio similar to the shape of the facets of a conventional rotating polygon s... | 12/22/2009 |
| 7629992 | Multibeam image forming apparatus In a scanning optical device which deflection-scans a plurality of fluxes of light by one rotary polygon mirror to form a multi-color image by irradiating beams on a plurality of photosensitive drums, respective, the fluxes of light being incident on the rotary poly... | 12/08/2009 |
| 7626606 | Light scanning apparatus, image forming apparatus equipped with such light scanning apparatus, and control method or image forming method for such image forming apparatus An image forming apparatus, includes: a latent image carrier whose surface includes an effective image region spanning across a predetermined width in a main scanning direction and is driven in a sub scanning direction approximately orthogonal to the main scanning d... | 12/01/2009 |
| 7593029 | Optical scanning device and image forming apparatus using the same An optical deflector of the present invention includes a movable mirror and torsion bars supporting the mirror and formed integrally with the mirror. The mirror reciprocatingly vibrates to reflect a light beam to thereby deflect it. The mirror is curved in the form ... | 09/22/2009 |
| 7557822 | Apparatus for and method of forming image using oscillation mirror A scan-beam detection signal Hsync provided by horizontal synchronous sensors 60A, 60B is inputted to a drive signal controlling section 10Y as a drive period signal related to a drive period of a deflective mirror. The drive signal controlling ... | 07/07/2009 |
| 7548361 | Image forming apparatus At least one exemplary embodiment is directed to an image forming apparatus, which includes: a first to fourth image bearing members on which toner images of four colors of yellow, magenta, cyan, and black are formed respectively; a first rotatable polygon mirror fo... | 06/16/2009 |
| 7548252 | Optical scanning apparatus and color image forming apparatus using the same An optical scanning apparatus and a color image forming apparatus using the same, in which streak-shaped density unevenness is reduced to prevent image deterioration: each of scanning surfaces is simultaneously scanned with light beams emitted from light source unit... | 06/16/2009 |
| 7538789 | Optical scanning device and image forming apparatus using the same An optical scanning device includes a rotary polygonal mirror for scanningly deflecting light beams emitted from a light source device having light emitting members disposed spaced apart from each other in a main-scan direction. The optical scanning device further i... | 05/26/2009 |
| 7439998 | Optical recording apparatus An optical recording apparatus includes a plurality of laser modules, an optical fiber array unit, a photosensitive member, and an optical system. Each laser module includes a light source and an optical fiber. The optical fiber array unit bundles a plurality of opt... | 10/21/2008 |
| 7428089 | Optical scanning device and image forming apparatus An optical scanning device includes a light source that emits a light beam, an optical deflector at which a light beam emitted from the light source is incident, the optical deflector deflecting the incident light beam, an optical system that guides the deflected li... | 09/23/2008 |
| 7420583 | Image forming apparatus and control method therefor There is provided an image forming apparatus which is capable of reducing a period of time required for obtaining an image output, in the case of changing the image forming operation from a monochromatic image formation to a color image formation during execution of... | 09/02/2008 |
| 7417661 | Image forming apparatus and program product optimizing scanner motor operation An image forming apparatus including: a speed information detection unit detecting speed information corresponding to a rotational speed of a scanner motor; a first judgment unit judging if the scanner motor has arrived at a first reference speed being lower than a ... | 08/26/2008 |
| 7400338 | Image forming apparatus with temperature detection An image forming apparatus including: an optical scanning unit for deflecting and scanning a light on a photosensitive body, the optical scanning unit having: a light source for emitting the light; a deflection section that deflects the emitted light; a driving sect... | 07/15/2008 |
| 7372604 | Multi-beam scanner, multi-beam scanning method, synchronizing beam detecting method and image forming apparatus A multi-beam scanner includes light sources, a deflector deflecting the beams emitted from the light sources at an equiangular velocity, a scanning image-forming optical system guiding the deflected beams to a surface so as to be formed into light spots on the scann... | 05/13/2008 |
| 7365765 | Apparatus for forming image and method of controlling same apparatus in self-diagnostic manner An apparatus for forming an image is disclosed which includes a scanner motor rotatably driving a polygon mirror; a laser light emitter emitting laser light; a generator detecting the laser light reflected off from the polygon mirror, thereby generating a first peri... | 04/29/2008 |
