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| Number | Title | Issue Date |
| 8358326 | Two-dimensional light scanning apparatus A two-dimensional light scanning apparatus includes: a deflector to drive at a resonance frequency in a main scanning direction and a sub-scanning direction different from the main scanning direction; a position sensor to detect a scanning position of the deflector;... | 01/22/2013 |
| 8350883 | Scanning optical apparatus and image forming apparatus using same An scanning optical apparatus of present invention converts plural light beams emitted from corresponding light source units by a light beam conversion unit, deflectively scans by a deflection unit, focuses by an imaging optical unit onto corresponding scanned surfa... | 01/08/2013 |
| 8330784 | Image forming apparatus having variable developer intervals An image forming apparatus including a black developer with increased capacity. The image forming apparatus includes optical scanners, where the optical scanners have the same focusing distance from the light source to the photo conductor, and the light reflecting u... | 12/11/2012 |
| 8325212 | Light scanning device and image forming apparatus provided with the same A light scanning device includes a light source emitting light, a polygon mirror reflecting the light while rotating, a mirror member having a mirror surface reflecting the light, reflected by the polygon mirror, toward an object to be scanned, a vibration preventin... | 12/04/2012 |
| 8248445 | Optical scanning apparatus and image forming apparatus using the same Provided is an optical scanning apparatus has a plurality of light emitting portions and an incident optical system including optical element, wherein each shape of optical surfaces in a main scanning section of optical elements is formed into a noncircular shape. W... | 08/21/2012 |
| 8238010 | MEMS device for producing a lemniscate pattern to counter zigzag effect A MEMS device, a printer and a method of printing is presented including providing a light source producing a modulated beam of light, positioning a mirror with a reflective surface to intercept the modulated beam of light. Allowing the mirror to rotate on a single-... | 08/07/2012 |
| 8233021 | Systems and methods for controlling polygon induced banding Systems and methods for reducing the degradation of image quality due to banding in an image processing system by detection of both integrated intensity and peak intensity of a laser beam reflected from the polygon mirror facet(s) of a motor polygon assembly. A band... | 07/31/2012 |
| 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 |
