Fuji Xerox Co., Ltd.

Nec Corporation

Hiromasa Kanno

Yuki Ono

Tatsuya Sato

Akio Fukuyama

Bokryong Lee

Osamu Takenouchi

Satoru Kaiya

Mitsuyuki Ishida

Nobuyuki Sato

Hitoshi Takemoto

Kei Otagiri

Toshihisa Naka

Miho Kamata

Naoya Koide

Atsushi Aketo

Masaru Yonemochi

Hisanori Yukawa

Shogo Sata

A sound emitting device includes: a speaker that is provided at a back surface of a user interface device; a support body that supports the user interface device; a horn portion that is provided in the support body; and a space portion that is a space formed inside the support body and extending from a sound emission region of the speaker to the horn portion.

Sound emitting device, image forming apparatus and electronic apparatus

An image forming apparatus includes: an operation display device that includes an operation display device body, a front light emission portion and a rear light emission portion, the operation display device body including an operation display provided in one face of the operation display device body, the front light emission portion being provided on an upper side of the face of the operation display device body where the operation display is provided, the front light emission portion emitting light in accordance with a processing status, the rear light emission portion being provided on an upper side of an opposite face of the operation display device body to the operation display, the rear light emission portion emitting light in synchronization with the front light emission portion, wherein the operation display device is attached to an upper portion of a body of the image forming apparatus.

Image forming apparatus

A printed board having an input/output terminal that connects with a component in an image formation apparatus through a cable, and a control circuit that controls the component, the printed board which includes a conductive pattern on which a capacitor that suppresses an emission of an electromagnetic wave from the cable is mounted between a grounding surface and a signal line from the input/output terminal, the conductive pattern being formed in the vicinity of the input/output terminal.

Printed board and image formation apparatus

The multicolor image forming apparatus according to the present invention comprises openings near the edge of the laser beam scanning start side, near the center, and near the edge of the laser beam scanning end side, on the photoconductor belt. The multicolor image forming apparatus measures time intervals from the horizontal synchronizing signal to the detection of the scanning start-side opening, the center opening, and the scanning end-side opening, respectively. The multicolor image forming apparatus calculates the function indicating the scanning speed at time t along the surface of the photoconductor, to correct the function indicating an image clock frequency at time t.

Multicolor image forming apparatus and method

According to an image data correction conversion circuit and a skew quantity correction method respectively according to the present invention, image data for predetermined lines is stored, the quantity of skew of the stored image data is measured, the number of blocks into which the image data is divided is operated based upon the quantity of the skew and a control signal for correcting and converting the image data based upon the operated data is output. A selector acquires image data the quantity of skew of which is corrected by selecting and outputting the stored image data for predetermined lines according to the control signal.

Correction conversion circuit for converting to image data skew of which is corrected and skew quantity correction method

An image forming apparatus providing precise image forming is disclosed. A timer is provided to measure a scan time required for a laser beam to move from a first end position to a second end position on a photosensitive belt, the frequency of the timing signal is adjusted depending on the scan time to keep a scan velocity of the laser beam with respect to the frequency of the timing signal at a predetermined constant pixel interval.

Image forming apparatus and method

A laser color image forming apparatus uses a plurality of laser beams, forms a latent image on a photosensitive belt by laser scanning having a fixed scanning frequency and a pixel forming clock frequency within one scanning, develops the latent image on the photosensitive belt by toner absorption using toner of a color corresponding to each laser beam, and then transfers the developed image to a printing medium such as a paper sheet or the like. Regarding image patterns for the detection of positional deviation, specifically designed to detect the quantity of printing positional deviation of a color to be measured, zonal patterns arrayed on a fixed cycle for a reference color and zonal patterns having shapes similar to the former and designed for the color to be measured are superposed to form a plurality of image patterns on the photosensitive belt. For the respective image patterns, the zonal patterns for the reference color and the color to be measured are shifted from each other based on the mutually different quantities of deviation. The reflection density of each image pattern is measured, and an image pattern having a minimum reflection density is detected. Based on the quantity of deviation of this detected pattern, the quantity of printing positional deviation of the color to be measured is detected. To eliminate the printing positional deviation, based on the detected quantity of printing positional deviation, the scanning start timing of laser scanning and the pixel forming clock frequency are changed.

Method for detecting quantity of laser scanning positional deviation on photosensitive body, correcting method thereof and laser color image forming apparatus

An image formation apparatus of the present invention forms an electrostatic latent image on a moving photosensitive belt by a laser beam produced by a laser device. A belt edge detector,detects an edge portion (belt edge) of a photosensitive belt,in a main scanning direction. A virtual edge detection circuit,generates a virtual edge detection signal,A which changes a generation timing in accordance with a change of a detection timing of the belt edge detected by the belt edge detector,. The generation timing of the virtual edge detection signal,A does not almost follow the detection timing of the belt edge which changes by flaws and non-linearity of the belt edge, and changes in accordance with a slow change of the detection timing. A synchronizing signal generation circuit,and a driving circuit,drives the laser device so as to start a writing of an image data by the laser beam in synchronization with the virtual edge detection signal.

Growing community of inventors

Niigata, Japan

Hiromasa Kanno