Class / Patent application number | Description | Number of patent applications / Date published |
347238000 |
Specific light source (e.g., LEDs assembly)
| 39 |
347241000 |
Specific optical structure
| 35 |
347237000 |
Driving circuitry
| 21 |
347236000 |
Feed back of light for intensity control
| 11 |
347239000 |
Specific light modulator
| 7 |
347234000 |
Synchronization of light with medium
| 7 |
347235000 |
Scan synchronization (e.g., start-of-scan, end-of-scan) | 5 |
20080211900 | SYSTEM AND METHOD FOR SCALING DATA TO COMPENSATE FOR SLANTED SCANNING ON A BIDIRECTIONAL SCANNING LASER PRINTER - A scanning system is adapted to scan an image beam across a photoconductive surface. The scanning system includes an oscillating mirror and is operable to generate an image beam and to reflect the image beam off the oscillating mirror to bidirectionally scan the image beam across the photoconductive surface and thereby discharge regions on the surface. The system is further operable to dynamically scale an intensity of the image beam as a function of a position of the image beam on the photoconductive surface. | 09-04-2008 |
20080225105 | OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - An optical scanning device includes a light source device having light emitting members of a number N (N is an integer not less than 2) disposed with a tilt with respect to a sub-scan direction and a main-scan direction, a deflecting device for scanningly deflecting light beams of the number N from the light emitting members, an input optical system for directing the light beams from the light source means to the deflecting device, an imaging optical system for directing the deflected light beams to a surface to be scanned, a synchronism signal detecting device for detecting a portion of a light beam scanningly deflected by the deflecting surface and producing writing start timing signals for the light beams upon the surface to be scanned, and a synchronism detecting optical system for directing the deflected light beams to the synchronism signal detecting device, wherein the synchronism signal detecting device detects a light beam emitted from a light emitting member among the light emitting members of the number N, except a light emitting member which emits a light beam that provides a least light quantity when the same is incident on the synchronism signal detecting device, to determine the writing start timing signal. | 09-18-2008 |
20090207230 | IMAGE FORMING APPARATUS AND IMAGE FORMING APPARATUS CONTROL PROGRAM - An image forming apparatus which concurrently exposes by multiple laser beams corresponding to M lines on the photoreceptor, comprising: multiple light sources for emitting laser beams; a memory section for storing the image data; a control section to control the plurality of light sources, wherein the control section is capable of controlling image formation by: a first mode for reading-out of image data for M lines, exposing by multiple light sources of M lines according to the image data for M lines, and forming an image at a predetermined sub-scanning direction image formation speed of VM; and a second mode for reading-out of image data for N lines (where N08-20-2009 | |
20100045767 | LIGHT-SOURCE DRIVING DEVICE, OPTICAL SCANNING DEVICE, AND COUNTING METHOD - A light-source driving device includes a high-frequency clock generating circuit that generates high-frequency clock signals of which phases are different from each other; an image-data generating circuit that generates a plurality of pieces of image data corresponding to light emitting units in accordance with image information; a write control circuit that generates a plurality of pieces of modulation data corresponding to the light emitting units based on the image data and adjusts output timing of the modulation data individually in units of time corresponding to a phase difference of the high-frequency clock signals; and a light-source driving circuit that drives the light emitting units based on a plurality of pieces of PWM data output from the write control circuit. | 02-25-2010 |
20130201270 | OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS - An optical scanning apparatus, including: a deflector including deflection surfaces and configured to deflect, by the deflection surfaces, light beams respectively emitted from light emitting portions for scanning in a main scanning direction; an imaging optical system configured to guide the light beams deflected for scanning by the deflection surfaces to a surface to be scanned; a light source including the light emitting portions arranged so as to be separated from each other in a sub-scanning direction perpendicular to the main scanning direction and an optical axis direction of the imaging optical system; and a controller configured to control the light source in such a manner that a difference between scanning start timings of the light beams at two adjacent deflection surfaces among the deflection surfaces is different from a difference between scanning start timings of the light beams at other two adjacent deflection surfaces among the deflection surfaces. | 08-08-2013 |
347245000 |
Housing or mounting | 3 |
20090322850 | Image Forming Appartaus - An image forming apparatus is provided, which includes: a photosensitive member; an exposure member; a gap keeping member; a positioning member and a swing regulating member. The swing regulating member is configured to come in contact with the exposure member at a contact position that is more upstream than the exposure member and that is more separated from the photosensitive member than a contact position between the positioning member and the exposure member. | 12-31-2009 |
20090322851 | Image Forming Apparatus and Method of Manufacturing the Same - An image forming apparatus is provided, which includes: a photosensitive member; an exposure member; a support frame supporting the exposure member; a gap keeping member; a pressing member; and an adjustment member. The adjust member is disposed between the exposure member and the support frame and configured to adjust a gap between the exposure member and the support frame to allow the exposure member to move in an optical axis direction. | 12-31-2009 |
20130155168 | METHOD AND APPARATUS FOR LASER MARKING AN OBJECT - Disclosed embodiments provide laser object marking methods and devices in which multiple slidable mechanisms are used for holding respective laser heads. | 06-20-2013 |
347240000 |
Tone marking | 2 |
20090262179 | METHOD FOR REDUCING THE AREA COVERAGE OF A PRINTING PLATE - Before image data are screened for the subsequent exposure of a printing form, files needed for the screening step are changed in such a way that the values of individual elements in the data fields are changed. The number of elements whose values are changed is determined by evaluating contiguous regions within the data fields. These can be, for example, threshold value matrices in which individual matrix elements are set to a value corresponding to the color white, or which, for the half-tones, are calibrated to a reduced value of the full-tone density. In the latter case, the full-tone image points are screened with a frequency-modulated screen. | 10-22-2009 |
20100194842 | METHOD AND APPARATUS FOR CORRECTING BANDING DEFECTS IN A PHOTORECEPTOR IMAGE FORMING APPARATUS - A method and apparatus for correcting banding defects in a photoreceptor image forming apparatus. The method or apparatus may form one or more images using one or more laser beams to alter an electrostatic charge on a photoreceptor, check the one or more images for one or more sets of image perfections arising from electric field attenuation in the photoreceptor, and compensate for the electric field attenuation. The method or apparatus may further form a compensated image. | 08-05-2010 |
Entries |
Document | Title | Date |
20080284838 | OPTICAL SCAN APPARATUS AND IMAGE FORMATION APPARATUS - An optical scan apparatus which deflects a plurality of light beams to scan a write region on a scan surface in a main scan direction is configured to include a light source which has a plurality of emission portions emitting the plurality of light beams arranged two-dimensionally on a plane in parallel to the main scan direction and a sub scan direction perpendicular to the main scan direction; a deflector which deflects the plurality of light beams from the plurality of emission portions; a light receiving element which receives the light beams and outputs a synchronous detection signal in accordance with the received light beams; and a control unit which selectively controls any one of the emission portions to emit a light beam upon each scanning and allows the light beam from the selected emission portion to be incident on the light receiving element via the deflector. | 11-20-2008 |
20090058980 | Multi-Beam Image Forming Apparatus - A multi-beam image forming apparatus includes a beam generating unit | 03-05-2009 |
20090219377 | MULTI-BEAM IMAGE FORMING APPARATUS - A multi-beam image forming apparatus is disclosed in which a semiconductor laser array including plural semiconductor laser elements serves as an optical beam generation unit. The apparatus includes a printing ratio counting unit that counts printing ratios of the semiconductor laser elements in plural printing areas divided in a scanning direction based on image data transmitted from a host unit; and a light amount control unit that controls emission light amounts of the semiconductor laser elements based on a result from the printing ratio counting unit. The light amount control unit calculates droop correction values corresponding to the printing areas from the printing ratios of the semiconductor laser elements based on the printing ratios in the printing areas counted by the printing ratio counting unit so as to correct the light amounts of the semiconductor laser elements. | 09-03-2009 |
20090244252 | APPARATUS FOR FORMING AN IMAGE AND CORRESPONDING METHODS - Disclosed are an apparatus, optical scanning device, and a corresponding method of forming images on a photosensitive surface. The apparatus includes a laser raster output scanner (ROS) including laser emitters arranged to simultaneously scan a plurality of laser beams across a single scan line of the photosensitive surface in response to received image data corresponding to pixels in an image to be reproduced, and a controller individually controlling each of the laser emitters to selectively apply one of a plurality of power levels to each of the laser beams based on the image data for each of the pixels, wherein a total power applied by the laser beams for each pixel is determined by a sum of the power levels applied by each of the laser beams. | 10-01-2009 |
20100060711 | SCANNING LINE ALIGNED IMAGE FORMING APPARATUS - An image forming apparatus includes an optical scanning system that simultaneously forms a group of two scanning lines extending in a main scanning direction on a surface of a photoconductive member at a prescribed scan line interval in a sub scanning direction. An exposure intensity distribution changing device is provided to symmetrically change exposure intensity distribution of two scanning lines in the main scan direction. A group of two scanning lines formed next on the photoconductive member partially overlaps with the group previously formed with displacement of a prescribed feed pitch in the sub scanning direction so that a prescribed numbers of the two scanning lines neighboring to each other of the different groups are paired to form a prescribed number of combination scan lines. The exposure intensity distribution changing device substantially equalizes the sum of the exposure intensity of the pair of neighboring scan lines of the combination scan line at every section in the main scanning direction. | 03-11-2010 |
20100188472 | FORMING AN IMAGE WITH A PLURALITY OF IMAGING HEADS - In the field of imaging systems where multi-channel imaging heads are used, there is a possible problem of formation of artifacts in the product material such as pinholes, banding, edge discontinuities due to variation in beam intensity of the individual channels. The visual observation of these artifacts can be minimised by using a plurality of multi-channel heads and having their scan paths interconnected. The visually observable variations in the image caused by uneven characteristics of the first multi-channel head are minimised by using a second multi-channel head and imaging the patterns using an imaging scan path which combines output from both of the imaging heads. | 07-29-2010 |
20110261137 | MULTI-BEAM EXPOSURE SCANNING METHOD AND APPARATUS, AND METHOD FOR MANUFACTURING PRINTING PLATE - An aspect of the present invention provides a multi-beam exposure scanning method for exposing and scanning same scanning lines a plurality of times by simultaneously irradiating an object with a plurality of light beams to engrave a surface of the object. The method includes a first exposure scanning process of forming a first shape ( | 10-27-2011 |
20120256997 | RECORDING APPARATUS - A recording apparatus includes a transportation mechanism that transports a recording material, a recording head that discharges photoactive liquids, a light irradiation section that irradiates the discharged photoactive liquids with light, and a failure detection section that detects failure of light emitting devices in the light irradiation section. This recording apparatus executes recording by masking a nozzle opening which corresponds to a failed light emitting device, when the failure detection section detects the failure. | 10-11-2012 |