Patent application number | Description | Published |
20090180156 | Image reading apparatus and image forming apparatus - An image reading apparatus is disclosed that includes a contact glass on which a document is placed; an imaging device configured to image a document image based on light reflected from the document through the contact glass; plural line image sensors arranged along a main scanning direction at positions where the document image is imaged and configured so that end portions of the line image sensors adjacent to each other similarly read same image data imaged at an overlapping area; a transmitted light quantity reduction unit disposed in the overlapping area on the contact glass and configured to reduce transmitted light quantity of a light transmitted through the contact glass; and a signal correction device configured to correct the signal intensity of the image data similarly read by the line image sensors adjacent to each other. | 07-16-2009 |
20090195843 | Image reading apparatus, document reading apparatus, and image forming apparatus - An image reading apparatus is disclosed that includes plural line image sensors partially overlapped with each other in an overlapped reading portion, the image reading apparatus characterized by: plural light sources disposed so as to face the overlapped reading portion; a light source turn-on unit sequentially and independently turning on the light sources; an optical unit converging each light emitted from the light sources onto the overlapped reading portion; and a position shift detecting unit detecting a position shift of a reading position of the line image sensors in the overlapped reading portion based on data of the overlapped reading portion. | 08-06-2009 |
20090316164 | Image forming apparatus - An image forming apparatus is disclosed that includes a recording head having a plurality of nozzles and scanning in forward and backward scanning directions to form dot images on the recording medium, an imaging unit imaging an image on the recording medium, a detection unit detecting a positional shift amounts of the dot images and inclination amounts of the recording head based on calibration image data obtained by imaging two first marks and two second marks in a single view by the imaging unit, and a correction unit correcting a drive of the recording head based on the detected positional shift amounts and the inclination amounts of the recording head. | 12-24-2009 |
20110205275 | Recording device and control method therefor - A recording device having a recording head including a nozzle line that eject ink from nozzles arranged in a transfer direction of a recording medium, a carriage, a moving device that moves the carriage forward and backward, a transfer device that transfers the recording medium, an ejection control device that forms a detection pattern by ejecting the ink, a two-dimensional sensor that detects the detection pattern, an analyzer that analyzes the image data of the detection pattern, and a detection device that detects misalignment of the printed dots, the ejection control device having a first dot group formation device that forms a first dot group, a second dot group formation device that forms a second dot group, and a third dot group formation device that forms a third dot group, the detection pattern being formed of the first dot group, the second dot group, and the third dot group. | 08-25-2011 |
20110298854 | Recording apparatus and control method therefor - A recording apparatus includes a carriage having a recording head including nozzles, a moving unit moving the carriage, a platen including plate members connected in a carriage traveling direction to support a recording medium when the nozzles eject ink onto the recording medium, a transferring unit transferring the recording medium in a transferring direction perpendicular to the carriage traveling direction, a recording control unit recording patterns at predetermined positions in the carriage traveling direction while moving the carriage in forward and backward traveling directions to form a carriage traveling direction pattern array, a determination unit determining ink ejecting times at the predetermined positions in the carriage traveling direction, and a time control unit to linearly interpolate between the determined ink ejecting times at the predetermined positions in the carriage traveling direction to control ink ejecting times for intervals between the predetermined positions based on a result of the linear interpolation. | 12-08-2011 |
20130135484 | IMAGE CAPTURING UNIT, COLOR MEASURING DEVICE, IMAGE FORMING APPARATUS, COLOR MEASURING SYSTEM AND COLOR MEASUREMENT METHOD - An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit. | 05-30-2013 |
20130155136 | RECORDING DEVICE AND CONTROL METHOD - A recording device includes: a detection unit converting scattering light generated by intersection between light emitted from a light-emitting unit and an ink droplet discharged from each nozzle of a nozzle array, into an electric signal in a light-receiving unit; a first signal generation unit amplifying the electric signal to generate a first electric signal; a determination unit determining presence or absence of an ink droplet based on a second electric signal representing change of the first electric signal; a relation information generation unit generating relation information in which an amplification value corresponding to the first electric signal generated when an arbitrary nozzle of the nozzle array discharges an ink droplet and the arbitrary nozzle are associated with each other; and a control unit performing control to amplify the electric signal at an amplification value according to a corresponding nozzle based on the relation information. | 06-20-2013 |
20130208289 | COLOR MEASURING DEVICE, IMAGE FORMING APPARATUS, COLOR MEASURING METHOD, AND COLOR MEASURING SYSTEM - A color measuring device includes a unit configured to calculate a reference-value matrix for converting imaged reference RGB value of a reference color patch a reference colorimetric value of the reference color patch; a unit configured to convert a color-measurement RGB value of a color measurement object into an imaged colorimetric value of the color measurement object by using the corresponding reference-value matrix; a unit configured to select reference color patches of which the reference colorimetric values each have a close distance from the imaged colorimetric value in the predetermined color space; a unit configured to select, as selection RGB values, the imaged reference RGB values of the selected patches; a unit configured to calculate a selection-RGB-value matrix for converting the selection RGB values into the reference colorimetric values; and a unit configured to convert the color-measurement RGB value into a colorimetric value by using the selection-RGB-value matrix. | 08-15-2013 |
20130229671 | IMAGE CAPTURING UNIT, COLOR MEASURING DEVICE, IMAGE FORMING DEVICE, COLOR MEASURING SYSTEM, AND COLOR MEASURING METHOD - An image capturing unit includes a sensor section that images a predetermined range including a subject; a reference chart section that is imaged by the sensor section with the subject; and an illumination light source that illuminates the subject and the reference chart section. The illumination light source is arranged at a position where a mirror reflection region that mirror reflects light entering from the illumination light source to the sensor section is outside a region of the subject and the reference chart section. | 09-05-2013 |
20130242319 | IMAGING UNIT, COLOR MEASURING DEVICE, IMAGE FORMING APPARATUS, COLOR MEASURING SYSTEM, AND COLOR MEASURING METHOD - An imaging unit includes a frame having an opening; a sensor unit that captures, via the opening, a subject located outside the frame; a reference chart unit that is arranged on the frame and is captured by the sensor unit together with the subject; and a cover member that covers the opening. | 09-19-2013 |
20130242320 | IMAGE CAPTURING UNIT, COLOR MEASURING DEVICE, IMAGE FORMING APPARATUS, COLOR MEASURING SYSTEM, AND COLOR MEASUREMENT METHOD - An image capturing unit includes: a sensor unit that captures an image of a predetermined area including an image capture object; a reference chart portion that is disposed in the predetermined area and an image of which is captured together with an image of the image capture object by the sensor unit; an illumination light source that illuminates the image capture object and the reference chart portion; and a specular reflection preventing member that prevents that specular reflection light of light emitted from the illumination light source enters the sensor unit. | 09-19-2013 |
20130242321 | IMAGE CAPTURING UNIT, COLOR MEASURING DEVICE, IMAGE FORMING DEVICE, COLOR MEASURING SYSTEM, AND COLOR MEASURING METHOD - An image capturing unit includes a sensor unit that captures a predetermined area including a subject; a reference chart that is arranged in the predetermined area and captured together with the subject by the sensor unit; an optical path length changing member that is arranged on an optical path extending from the subject to the sensor unit and is capable of changing a length of the optical path. | 09-19-2013 |
20130242361 | IMAGE CAPTURING DEVICE, COLOR MEASURING DEVICE, COLOR MEASURING SYSTEM, IMAGE FORMING APPARATUS, AND COLOR MEASURING METHOD - An image capturing device includes a sensor unit that captures a predetermined range including a subject; a reference chart that is captured by the sensor unit together with the subject; an illumination light source that illuminates the subject and the reference chart; a lens member including one or more lenses arranged in an optical path of reflected light extending from the subject and the reference chart to the sensor unit; and a lens moving unit that moves at least one lens of the lens member so as to change a position thereof in a direction along the optical path. | 09-19-2013 |
20140146101 | IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND COMPUTER-READABLE STORAGE MEDIUM - An image forming apparatus includes a recording-head carrier including a recording head for ejecting a liquid droplet onto a recording medium, a relative moving unit configured to relatively move the recording-head carrier and the recording medium; an image recording unit configured to drive the recording head by a driving signal having a driving waveform to eject liquid droplets toward the recording medium while relatively moving the recording-head carrier and the recording medium; a driving-waveform determining unit configured to determine the driving waveform of the driving signal based on a detected temperature near the recording head; a drive-timing determining unit configured to determine drive timing at which the recording head is driven by the driving signal, based on the detected temperature; and a drive control unit configured to set the driving waveform and the drive timing to the image recording unit to drive the recording head. | 05-29-2014 |
20140152737 | IMAGE FORMING APPARATUS, METHOD FOR FORMING TEST PATTERN, AND COMPUTER PROGRAM PRODUCT - An image forming apparatus includes a recording head in which a plurality of nozzles for discharging liquid droplets; and a pattern forming unit configured to form a test pattern used for positional deviation adjustment including a first pattern serving as a reference pattern and a second pattern serving as an adjustment pattern. The first pattern and the second pattern each are a linear pattern that is parallel to a nozzle arrangement direction and has a disconnected portion. The disconnected portion of the first pattern and the disconnected portion of the second pattern are shifted from each other in the nozzle arrangement direction. | 06-05-2014 |
20140153006 | IMAGE FORMING APPARATUS, METHOD OF ADJUSTING IMAGE POSITIONAL DEVIATION, AND COMPUTER PROGRAM PRODUCT - An image forming apparatus forms adjustment patterns having a predetermined edge interval on a recording medium, while moving a carriage mounted with recording heads that eject a liquid droplet on the recording medium and formed of a sub-scanning motor and the like in a main-scanning direction by a main-scanning motor. The image forming apparatus performs a positional deviation correction process in which the adjustment pattern formed on the recording medium is read by a reading sensor mounted on the recording heads, while moving the carriage in the main-scanning direction, to correct a positional deviation of a landing position of the liquid droplet ejected from the recording heads based on an ideal interval between the adjustment patterns and a read result of the reading sensor repeatedly at least twice. | 06-05-2014 |