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| Number | Title | Issue Date |
| 7936368 | Image forming method and image forming apparatus Positioning displacement characteristics of each of scanning beams are obtained in advance. The positioning displacement characteristics is indicative of a relation between temperature and a displacement amount by which each of the scanning beams is displaced in a s... | 05/03/2011 |
| 7656422 | Pulse width modulaton device and image forming apparatus A disclosed device for generating a pulse-width modulated signal according to image data and based on a pixel clock signal includes a pixel clock generating unit configured to generate the pixel clock signal and a modulated data generating unit configured to generat... | 02/02/2010 |
| 7602410 | Apparatus for and method of forming image using oscillation mirror As a scanning light beam which is scanning and traveling away from an effective image region moves passed the location of a sensor, a horizontal synchronizing signal Hsync is obtained as a first detection signal. A deflection mirror surface turns around, thereby rev... | 10/13/2009 |
| 7551195 | Light scanning device A light scanning device capable of scanning a light beam on a photosensitive surface includes a light receiving system configured to receive the light beam and output a light receiving signal and a synchronizing signal generating system configured to generate a sync... | 06/23/2009 |
| 7456856 | Clock signal generation circuit, optical scanning apparatus, and image forming apparatus The present invention discloses a clock signal generation circuit for generating one or more clock signals for performing a scanning operation by scanning a light beam from a light source to a scan target. The clock signal generation circuit includes a determination... | 11/25/2008 |
| 7443414 | Apparatus for and method of forming image using oscillation mirror As a scanning light beam which is scanning and traveling away from an effective image region moves passed the location of a sensor, a horizontal synchronizing signal Hsync is obtained as a first detection signal. A deflection mirror surface turns around, thereby rev... | 10/28/2008 |
| 7432943 | Image forming apparatus An image forming apparatus which has a plurality of image forming stations arranged in parallel, each of the image forming stations having a photosensitive drum, and which forms a desired image by combining toner images formed on the photosensitive drums. A laser sc... | 10/07/2008 |
| 7391431 | Image forming apparatus for correcting magnification of image A measuring unit measures a time difference between detections of the optical beams by an optical beam detector arranged on either side of an image carrier with respect to a horizontal scanning direction. A magnification correcting unit determines whether a beam spo... | 06/24/2008 |
| 7388597 | Beam light scanning device and image forming apparatus using same A beam light scanning device includes an image data processing unit operable to output image-processed data of neighboring pixels in such a way that the data is divided for distribution into first pixel data and second pixel data. The scanner also includes a synchro... | 06/17/2008 |
| 7372479 | Apparatus and method for optical image formation control An image forming apparatus for forming images with an electrophotographic system. The image forming apparatus includes a laser drive unit configured to control a laser light, and an image data transfer control unit configured to control image data from to the laser ... | 05/13/2008 |
| 7369148 | Frequency modulation apparatus and frequency modulation method A frequency modulation apparatus capable of reducing a peak level of a radiation noise of a characteristic frequency band due to an image clock. This frequency modulation apparatus is used in an image formation apparatus having an image bearing body to be scanned by... | 05/06/2008 |
| 7369151 | Laser control circuit and image forming apparatus An image data processing section subjects input image data to image processing, and outputs first to fourth image data. First to fourth pulse width modulation circuits are PWM circuits in each of which a plurality of reference positions are set in one pixel, and out... | 05/06/2008 |
| 7365764 | Scanning optical apparatus and color image forming apparatus using the same A scanning optical apparatus includes a light source capable of being modulated, a deflecting element for deflecting and scanning a beam emitted from the light source, a scanning optical element for imaging the deflected beam into a spot shape on a scanned surface, ... | 04/29/2008 |
| 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 |
| 7365797 | Display synchronization signal generation apparatus in digital broadcast receiver and decoder A display synchronization signal generation apparatus and method is provided which makes it possible to display a stable image irrespective of changes in transmission speed of a received digital broadcast signal by generating a synchronization signal of an image to ... | 04/29/2008 |
| 7355618 | Image exposure apparatus An image exposure apparatus of a different angle incident type is provided having a single optical sensor unit for determining the timing for start point synchronization along the main scanning direction, an output level detecting device determining the output level... | 04/08/2008 |
| 7352480 | Image processing apparatus and image processing method An image processing apparatus which comprises a RAM acting as a shared memory for storing image data, and an image processing board, connected to the RAM through a PCI bus acting as a general-purpose bus, for performing raster conversion to the image data and perfor... | 04/01/2008 |
| 7345695 | Image-forming device A scanning unit of an image-forming device has a polygon mirror for deflecting a laser beam across the surface of a photosensitive member. A disc that rotates together with the polygon mirror is provided with a reference mark. When the reference mark passes a photoi... | 03/18/2008 |
| 7342598 | Apparatus and method for recording image on printing plate A printing apparatus with a plate-making mechanism with a data modification part for modifying width of an original image in a subscan direction by computation to obtain a modified image and a controller for recording an image with its length in a main scan directio... | 03/11/2008 |
| 7339603 | Exposure device for an electrophotographic apparatus An exposure device for an electrophotographic apparatus including one or more laser light sources which expose an image carrier in accordance with a print information signal supplied from an external information processing apparatus, a resolution switching lens, and... | 03/04/2008 |
| 7330296 | Synchronous detector, optical scanner, and image forming apparatus A synchronous detector detects timing of scanning by an optical scanner in an image forming apparatus. The optical scanner has a light source that emits a light beam, a deflecting unit that deflects the light beam, a scanning optical element that focuses the light b... | 02/12/2008 |
| 7327379 | Pixel clock and pulse-modulation-signal generating device, optical scanner, and image forming apparatus A pixel clock and pulse-modulation-signal generating device includes a high-frequency-clock generating unit that generates a high-frequency clock; a modulation-data generating unit that generates, based on pixel control data that specifies a pixel length and image d... | 02/05/2008 |
| 7315320 | Optical writing system and method, and image forming apparatus receiving an external parameter An optical writing system with at least two laser diodes capable of correcting hue deviations. The optical writing system is capable of correcting dot forming positions in the main scanning direction, and setting values for correction through an external key operati... | 01/01/2008 |
| 7295049 | Method and circuit for rapid alignment of signals Circuits and methods for aligning two or more signals including a first and second signal. In one embodiment, a shift register generates two or more shifted copies of the second signal, and each of a plurality of phase detectors receives the first signal and one of ... | 11/13/2007 |
| 7292612 | Semiconductor laser drive apparatus, optical write apparatus, imaging apparatus, and semiconductor laser drive method A semiconductor laser drive apparatus and method are disclosed in order to obtain an optimal laser emission pulse that can reduce inherent light emission that may cause fogging and degradation of a photoconductor and also reduce turn on delay. Specifically, a light ... | 11/06/2007 |
| 7290190 | Semiconductor integrated circuit with a test circuit A shift scan chain includes logic circuit blocks 11-18 and scan registers 21-28 connected at stages succeeding them. The shift chain is divided into divisional chains including the scan registers 21-24 and the scan registers... | 10/30/2007 |
| 7287700 | Light emitting timing adjustment method, laser scanning apparatus, and image formation apparatus A laser scanning apparatus includes: a plurality of laser light sources including a first laser light source and a second laser light source; a scanner for scanning laser lights emitted from the plurality of laser light sources in a main scanning direction; a light ... | 10/30/2007 |
| 7280129 | Pixel position specifying method, method of correcting image offset, and image forming device A pixel position specifying method in an image forming device, the method measuring positions of exposure beams of the respective exposure heads and specifying pixel positions of junctures of the exposure heads, the method includes: using a beam position detecting m... | 10/09/2007 |
| 7280128 | Apparatus for and method of recording image An image recording apparatus includes a scanning part for recording a plurality of unit images individually on a plurality of recording media, the plurality of unit images being to be superimposed on each other to form a single objective image. The scanning part cau... | 10/09/2007 |
| 7277113 | Method and apparatus for image forming An image forming apparatus in which the intensity of a light beam used to form a latent image is switched in response to a change in resolution. A laser emits a light beam for forming a latent image on a photosensitive drum. A polygon mirror scans the emitted light ... | 10/02/2007 |
| 7271855 | Liquid crystal display with pads having one edge having grooves therein wherein the edge is formed at a cutting line of the shorting bar Disclosed is a method for fabricating a liquid crystal display. The method includes the steps of: forming a lower substrate and an upper substrate, the lower substrate including a data drive circuit connected with data lines of a thin film transistor array and a gat... | 09/18/2007 |
| 7272272 | Optical deflector based on photonic bandgap structure An optical deflector comprises a photonic crystal section, a light lead-in means for leading in light having a specific wavelength to the photonic crystal section and an external force application means for deforming the photonic crystal section by way of mechanical... | 09/18/2007 |
| 7256803 | Direct thermal printer A direct thermal printer device that can be used in any application using thermal printers. A direct thermal printer creates images on thermally active medium by applying light energy or radiant thermal energy created by a thermal heat source to create the heat nece... | 08/14/2007 |
| 7256815 | Image forming method, image forming apparatus, optical scan device, and image forming apparatus using the same An optical scan device having an optical deflector reflecting a light beam from a light beam source so as to deflect the light beam and having a surface to be scanned on which information is written such that the light beam deflected by the deflector scans the surfa... | 08/14/2007 |
| 7253829 | Printing apparatus and method having functions to compensate for light intensity difference A print apparatus including a photoconductive drum, a laser scanning unit (LSU) to scan a surface of the photoconductive drum, and an image processing unit to generate and output dot size information corresponding to externally input image data. The dot size informa... | 08/07/2007 |
| 7239335 | Apparatus and method for image forming capable of processing an image at suitable clock speeds An image forming apparatus and an image forming method. The image forming apparatus includes a scanner mechanism for reading out image data from an original document, and a printer mechanism for printing an image based on the image data. The printer mechanism includ... | 07/03/2007 |
| 7212224 | Pixel clock creation method, pixel clock creation device, optical scanning device, and image forming apparatus In a pixel clock creation method and device, a high frequency clock is created. A scanning time needed to scan a predetermined scanning length is detected in accuracy of half a period of the high frequency clock to output a detection value indicating the detected sc... | 05/01/2007 |
| 7209158 | Scanning line alignment compensation apparatus and method for a laser printer A scanning line alignment compensation apparatus and method for a laser printer. The scanning line alignment compensation apparatus includes a laser scanning unit (LSU) having a first laser diode and a second laser diode and at least one sync signal detection sensor... | 04/24/2007 |
| 7196716 | Electronic trapping implementation in imager with laser driver An electronic trapping implementation in imager with laser driver is provided by comparing an output image from the imager to a reference image to obtain a difference image and calculating one or more frequency and amplitude modulations based on the difference image... | 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 |
