Patent application number | Description | Published |
20110164888 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - This invention is to provide a technique of always obtaining a stable output image in image formation using toner. A supplier ( | 07-07-2011 |
20120063796 | IMAGE FORMING APPARATUS CAPABLE OF PROVIDING STABLE IMAGE QUALITY - An image forming apparatus capable of making image quality more stable than in the prior art. An electrostatic latent image is formed on the surface of a photosensitive member based on an image signal. A developing device develops the electrostatic latent image on the photosensitive member by toner to thereby form a patch image. An optical sensor detects the density of the patch image. A toner charge amount is calculated from the density detected by the optical sensor, and a change in the toner charge amount is predicted based on a plurality of results of the calculation of the toner charge amount. The image forming apparatus generates a γLUT for use in correcting the relationship between the image signal and the density based on the predicted change in the toner charge amount. | 03-15-2012 |
20120128380 | IMAGE FORMING APPARATUS WHICH CONTROLS SETTING OF CONTRAST POTENTIAL - This invention provides an image forming apparatus capable of bringing the output density close to a target density even if the charge amount of toner particles changes. The image forming apparatus includes an image forming unit having an image carrier and a developing unit, a storage unit having the saturation charge amount of toner particles, and a control unit. The control unit forms a patch image using the image forming unit, measures the density of the patch image to obtain a first potential that is a contrast potential corresponding to a target density, estimates the charge amount of the toner particles in the developing unit to obtain a first charge amount, obtains a second potential from the first potential, the first charge amount and the saturation charge amount, and set the second potential as the contrast potential. | 05-24-2012 |
20130064560 | IMAGE FORMING APPARATUS HAVING STABLE IMAGE DENSITY - An image forming apparatus capable of performing both of stabilization of image density on a short-term basis and that on a long-term basis in a compatible manner. A CPU predicts an amount of electrostatic charge of toner particles in a developer container, sets a potential forming condition for image creation, and forms a toner image to be fixed on a recording medium, on a photosensitive drum according to the set potential forming condition. The CPU forms a pattern image for controlling a toner replenishment amount, on the photosensitive drum, under a potential forming condition which is set independently of the potential forming condition for image creation, and controls the amount of toner to be supplied to the developer container such that density of the pattern image, detected by an optical sensor, becomes equal to a target density. | 03-14-2013 |
20130071131 | IMAGE FORMING APPARATUS CAPABLE OF STABILIZING IMAGE DENSITY ON A SHORT-TERM AND LONG-TERM BASIS - An image forming apparatus capable of stabilizing image density on a long-term basis by compensating for an error in prediction of toner particle charge amount, while reducing variation in image density on a short-term basis by the prediction. A CPU predicts an amount of electrostatic charge of toner particles in a developer container and sets an exposure condition and causes a toner image to be fixed on a recording medium and a pattern image for detecting image density, to be each formed on a photosensitive drum according to the set exposure condition, while performing gradation correction based on the gradation conversion table. The CPU updates the gradation conversion table such that a detected density of the pattern image becomes closer to a target density. The CPU sets the exposure condition based on a result of the prediction such that toner image density becomes constant. | 03-21-2013 |
20130089346 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - This invention is to provide a technique of always obtaining a stable output image in image formation using toner. A supplier ( | 04-11-2013 |
20140064749 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - This invention is to provide a technique of always obtaining a stable output image in image formation using toner. A supplier ( | 03-06-2014 |
20140119750 | IMAGE PROCESSING APPARATUS AND METHOD THEREOF - Transmission information indicating transmittance of light of a printing medium used in image formation is acquired, a reduction ratio with respect to a maximum amount of mounted color materials used in the image formation is set based on the transmission information, and a fixing index indicating a fixing state of the color materials with respect to the printing medium is set based on the transmission information. | 05-01-2014 |
20140153011 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - A device for controlling an image forming apparatus includes an acquisition unit configured to acquire image data, and pixel piece insertion/extraction information indicating whether a pixel piece needs to be inserted into or extracted from each pixel of the image data, a generation unit configured to generate an exposure signal according to a pixel value indicating a pixel of interest in the image data and to pixel piece insertion/extraction information on the pixel of interest, and a control unit configured to control exposure by the apparatus according to the exposure signal. The generation unit causes the pixel of interest to be formed by a plurality of pixel pieces arranged in a direction in which the apparatus scans, presets at least one of the pixel pieces as an adjustment blank pixel piece, and deletes the piece when the width of the pixel of interest in the scanning direction is reduced. | 06-05-2014 |
20140340707 | MEASUREMENT APPARATUS AND CONTROL METHOD THEREOF - A measurement apparatus comprises a light source of line shape configured to move in a predetermined direction and illuminate a measurement target object, and a capturing unit configured to capture the measurement target object illuminated by the light source of line shape. The measurement apparatus controls the light source of line shape and the capturing unit, and estimates the reflection characteristics of the measurement target object from a plurality of images captured by the capturing unit. | 11-20-2014 |