Patent application number | Description | Published |
20080266634 | Light Scanning Device and Image Forming Apparatus - A light scanning device is provided. The light scanning device includes: an oscillating mirror which oscillates rotationally and reflects a light beam to be scanned over a scanning range, the scanning range including a first scanning range and a second scanning range set across a center of the scanning range; a detection unit including a light receiving face, on which the light beam is incident, to detect the light beam; and first and second stationary mirrors which reflect the light beam reflected by the oscillating mirror to the first scanning range and the second scanning range, respectively, to be incident on the light receiving face, wherein an incident pattern of the light beam reflected by the first stationary mirror incident on the light receiving face is different from an incident pattern of the light beam reflected by the second stationary mirror incident on the light receiving face. | 10-30-2008 |
20080278784 | Optical Scanning Device and Printing Apparatus - An optical scanning device comprises: an oscillating mirror which has a pair of electrodes and a mirror oscillator; a driving unit which applies a wave-like driving signal to the electrodes so as to oscillate the mirror oscillator correspondingly to the driving signal; a detecting unit which detects an oscillation amplitude of the oscillating mirror; an adjusting unit which changes a value of at least one of a duty ratio, a driving frequency, an amplitude, and a bias voltage of the driving signal as a parameter so as to adjust the oscillation amplitude detected by the detecting unit to a target value; and a storing unit which stores the value of the parameter changed by the adjusting unit as a reference value, wherein when the oscillating mirror is activated, the adjusting unit starts the adjusting of the oscillation amplitude with using the driving signal based on the reference value. | 11-13-2008 |
20090074429 | Image Forming Apparatus - In an image forming apparatus, an image forming portion forms an image on a rotator. A storage portion stores change characteristics information relevant to correction parameters corresponding to phase points of the rotator. A designating portion sequentially designates the correction parameters based on the change characteristics information. A correcting portion corrects an image forming position on the rotator based on the correction parameter designated by the designating portion. When it is determined, based on a detecting phase point of the rotator detected by a detecting portion, that the current phase of the rotator corresponds to a gradual phase point at which the correction parameter changes at a rate equal to or lower than a predetermined value, the designation by said designating portion is shifted to the correction parameter corresponding to the gradual phase point. | 03-19-2009 |
20090245830 | Image Forming Apparatus - An image forming apparatus is provided. A second photoconductor is disposed at a downstream side of a first photoconductor in a moving direction of a medium. First and second exposure units form first and second electrostatic latent images on the first and second photoconductors line by line at first and second exposure timing intervals in first and second exposure enabling time periods based on successive lines of first and second image data, respectively. A correction unit corrects at least one of the first and second exposure timing intervals. A change unit changes the second exposure enabling time period so as to suppress a difference between the number of the successive lines of the first image data and the number of the successive lines of the second image data. | 10-01-2009 |
20090295903 | Image Forming Apparatus, Manufacturing Method Thereof, and Exposing Device - A method and apparatus usable in an image forming apparatus, comprising a photoreceptor, and a plurality of exposing devices having a plurality of light emitting elements arranged therein for exposing the photoreceptor, wherein the plurality of exposing devices include at least two exposing devices having a distribution tendency similar to the plurality of light emitting elements. | 12-03-2009 |
20120163836 | Image-Forming Apparatus - An image-forming apparatus for forming an image using toner contained in a toner cartridge, genuineness of the toner cartridge with or without a memory device is verified. A counter counts a value concerning image formation. A cartridge detector determines the presence or absence of the toner cartridge. A reader is configured to retrieve data from a memory device if any provided in the toner cartridge. A controller is configured to exercise two types of control. If the cartridge detector determines that the toner cartridge is present, the value counted by the counter is greater than a predetermined value, and the reader has failed retrieval of predetermined data, then a first type of control conformable to a toner cartridge other than a genuine toner cartridge is exercised. Otherwise, a second type of control conformable to the genuine toner cartridge is exercised. | 06-28-2012 |
20160033891 | EXPOSURE DEVICE, IMAGE FORMING APPARATUS, AND METHOD OF CONTROLLING EXPOSURE DEVICE - A plurality of light emitting elements is arranged in a main scanning direction. A setter is configured to set a basal exposure period of the plurality of light emitting elements, based on a clock count of frequency-spread clocks. A candidate generator is configured to add, to the basal exposure period, predetermined N alteration periods (N is an integer greater than or equal to two) having different lengths from each other, thereby generating N candidate exposure periods having different lengths from each other. A detector is configured to detect a frequency level of the clocks in a period corresponding to the basal exposure period. A selector is configured to select, as an exposure period for lighting the plurality of light emitting elements, a longer one of the N candidate exposure periods as the frequency level detected by the detector is higher. | 02-04-2016 |
20160063362 | IMAGE FORMING SYSTEM, INTEGRATED CIRCUIT CHIP, AND IMAGE FORMING APPARATUS - An integrated circuit chip configured to be connected to an image forming apparatus having a light source, a photosensitive member, and a light receiver includes a synchronizing signal output circuit, a data output circuit, an OR circuit, a chip-side communicator, first and second wiring lines. The synchronizing signal output circuit is configured to output a synchronizing signal for lighting the light source. The data output circuit is configured to output an image data signal for lighting the light source. The OR circuit is configured to output a lighting signal that is a logical sum of the synchronizing signal and the image data signal. The chip-side communicator is configured to transmit the lighting signal to the image forming apparatus. The first wiring line connects the synchronizing signal output circuit with the OR circuit. The second wiring line connects the data output circuit with the OR circuit. | 03-03-2016 |
20160063363 | IMAGE FORMING APPARATUS - An image forming apparatus includes a light source, a reflector, a photosensitive member, a light receiver, and an integrated circuit chip. The integrated circuit chip outputs, to the light source, a lighting signal for controlling lighting of the light source. The integrated circuit chip includes a synchronizing signal output circuit, a receiver, a first OR circuit, and a first wiring line. The synchronizing signal output circuit is configured to output a synchronizing signal for lighting the light source. The receiver is configured to receive a first image data signal outputted from an external circuit, the first image data signal being for lighting the light source. The first OR circuit is configured to output a first lighting signal that is a logical sum of the synchronizing signal and the first image data signal. The first wiring line connects the synchronizing signal output circuit with the first OR circuit. | 03-03-2016 |