Patent application number | Description | Published |
20120294635 | IMAGE STABILIZATION CONTROL SYSTEM AND IMAGE FORMING APPARATUS DIRECTED TO ELECTROPHOTOGRAPHIC PROCESS - An image stabilization control system directed to an electrophotographic process is provided. The image stabilization control system includes a color measuring unit for measuring the color of a toner image after being fixed on a medium. The color measuring unit has an SCE color measuring function of measuring a component excluding specular reflection out of reflected light produced by light emitted from a light source being reflected at the toner image and an SCI color measuring function of measuring the reflected light including the specular reflection. A control value for a fixing step in the electrophotographic process is adjusted based on a first component attributed to a glossiness difference in chrominance, and a control value for a step other than the fixing step in the electrophotographic process is adjusted based on a second component attributed to another factor in the chrominance. | 11-22-2012 |
20130216262 | ROTARY DAMPER AND IMAGE FORMING APPARATUS - A plurality of first viscoelastic bodies are disposed in insertion holes of a first rotary member. A plurality of second viscoelastic bodies are disposed in guide holes of a second rotary member. Each of the first and the second viscoelastic bodies has an elastic coefficient changing in accordance with aging due to use. A guide member moves a contact member along the insertion hole and the guide hole. The contact member applies a compressive load to the first viscoelastic body. The aging of the second viscoelastic body due to the compressive load applied thereto moves a position of the first viscoelastic body where the compressive load is received from the contact member toward a farther side from a rotational shaft side. | 08-22-2013 |
20140043627 | COLOR CORRECTING SYSTEM AND IMAGE FORMING APPARATUS INCLUDING SAME - A color correcting system mountable in an image forming apparatus comprises an imaging unit configured to perform image formation and a control unit configured to acquire a control parameter for use in image formation by the imaging unit and a status parameter indicating a status at the time of image formation. If a value for a color in an image formed by the imaging unit does not exceed a first threshold, and at least one member selected from the group consisting of adhering toner amount, gloss, line width, and line position for the image formed by the imaging unit does not exceed a second threshold, the control unit is configured to determine a control parameter on the basis of the acquired control parameter and the acquired status parameter, such that at least a color difference decreases. | 02-13-2014 |
20140232805 | OPTICAL WRITING DEVICE AND IMAGE FORMING APPARATUS - An optical writing device having; a plurality of light-emitting points; a plurality of drive circuits for supplying drive currents to the plurality of light-emitting points respectively; a photodetector for outputting signals indicating quantities of light entering thereto from the respective light-emitting points; a gain switch circuit for outputting photodetection signals obtained by amplifying the signals output from the photodetector in regard to the respective light-emitting points with gains preset for the respective light-emitting points; and a control circuit for controlling the drive circuits such that the photodetection signals output from the gain switch circuit in regard to the respective light-emitting points coincide with a value substantially equal to a predetermined reference value. The gains for the respective light-emitting points are preset based on the distances between the photodetector and the respective light-emitting points. | 08-21-2014 |
20140267527 | OPTICAL WRITING DEVICE AND IMAGE FORMING APPARATUS - An optical writing device for forming an electrostatic latent image on a photoreceptor by exposing the photoreceptor to light modulated in accordance with image data. The optical writing device has: a substrate; a light-emitting-element array including a plurality of light-emitting elements supported by the substrate to be arranged in a main-scanning direction; and a light-receiving-element array substantially in parallel to the light-emitting-element array, the light-receiving-element array including a plurality of light-receiving elements supported by the substrate to be arranged in the main-scanning direction. For light-quantity measurement of one of the light-emitting elements, at least an output value output from one of the light-receiving elements of which center is located in a different position, with respect to the main-scanning direction, from a center of the one of the light-emitting elements is used. | 09-18-2014 |
20140375743 | LIGHT-EMITTING ELEMENT, IMAGE FORMING APPARATUS, IMAGE DISPLAY APPARATUS AND IMAGE READING APPARATUS - A light-emitting element having a light-emitting section and a light-receiving section provided on a substrate. The light-emitting section includes: an organic compound in which light is emitted; a translucent reflecting portion that transmits the emitted light which has spectral radiance changeable with changes in ambient temperature; and a transparent portion that radiates first part of the light coming through the translucent reflecting portion to outside and total-reflects second part that is light incident to a boundary surface therebetween at angles larger than a critical angle. Wherein, the light-receiving section is capable of receiving the light total-reflected at the boundary surface, the received light having a quantity of light changeable with changes in wavelength of the light passing through the translucent reflecting portion. The light-receiving section further outputs a signal which has an amplitude level in correlation to the quantity of light. | 12-25-2014 |
20150103865 | OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, AND TEMPERATURE CALCULATION METHOD - An optical writing device having; a plurality of light-emitting points; a photodiode configured to output a signal which represents a quantity of incident light from a predetermined light-emitting point selected from the plurality of light-emitting points; and a calculation section for calculating a temperature of the photodiode based on a magnitude of a photodiode dark current included in the signal output from the photodiode while the predetermined light-emitting point is OFF. | 04-16-2015 |
20150239258 | OPTICAL PRINT HEAD AND IMAGE FORMING APPARATUS - An optical print head performs optical writing onto target, and includes: current-driven light-emitting elements arranged in rows in a predetermined direction; driving transistors that are each electrically series-connected with the light-emitting elements in one-to-one correspondence, and each supply a driving current to a corresponding light-emitting element; a current control unit that controls, for each light-emitting element, a driving current amount in accordance with variation in light-emitting properties of the light-emitting element that indicate relation between the driving current amount and a light amount emitted by the light-emitting element; an application unit that, upon receiving electrical power supplied from an external power source, applies application voltage to circuits each consisting of a light-emitting element and a corresponding driving transistor; and a voltage control unit that suppresses variation in divided voltage applied to each driving transistor by controlling the application unit to apply increased application voltage of the driving current amount increases. | 08-27-2015 |