Canon Kabushiki Kaisha

Akitoshi Kikuchi

Tomoyuki Takeda

Makoto Satake

Katsutoshi Ushida

An image-forming apparatus includes a first monitor which detects whether a non-paper-medium supplier is attached to the main body of the image-forming apparatus. When a normal copying process is selected, the copying process is stopped immediately if the first monitor determines that the non-paper-medium supplier is attached and an error message indicating that a printing process cannot be performed since the non-paper-medium supplier is attached is shown on the main body. In addition, if a facsimile is received while the non-paper-medium supplier is attached to the main body, the user is informed that the facsimile call is received. Accordingly, the user can change the setting of the image-forming apparatus so that the facsimile can be received. Thus, the facsimile is received manually if the non-paper-medium supplier is attached to the main body and is received by operation after the line is acquired by a handset telephone.

Image-forming apparatus and method for controlling the same

An image reading apparatus for reading a document by causing an image sensor having a plurality of light receiving pixels to scan the document including an encoder configured to output pulses according to rotation of a motor, a generating unit configured to generate a read synchronizing signal for the image sensor based on the pulses, an obtaining unit configured to obtain first shading data corresponding to at least two data accumulation time points from the image sensor, and a storage unit configured to store the first shading data, wherein a function is generated with second shading data corresponding to a read data accumulation time point and is corrected on the basis of the first shading data.

Image reading apparatus and method

A scanner unitof an MFPperforms prescanning and generates white area determination dataNext, at the scanning operation, the scanner unitrefers to the white area determination datato detect a white stripe. In this area, a motor is driven at high speed.

Image processing apparatus, method for controlling image processing apparatus

Stepping drive control of a motor is effected by synchronizing interruption to a CPU with N (in number) line triggers set to N times of one-line of an image. Further, in a synchronous mode in which phase control is effected in synchronous with N line triggers, acceleration/deceleration table can be switched not only by the N line triggers (external triggers) but also by internal triggers. With this arrangement, acceleration and deceleration of the motor is permitted within the N line triggers (external triggers) while being synchronized with the N line triggers (external triggers), thereby reducing a burden of software processing and realizing motor control corresponding to interruption of one line during high speed reading.

Stepping motor controlling apparatus and method, and image reading apparatus and method

In a system using a clock synchronous type synchronous DRAM (SDRAM), when a power supply voltage monitoring circuit informs a timing circuit of a decrease in voltage from a main power supply, the timing circuit outputs a self refresh request signal to a CPU. In response to the self refresh request signal, the CPU outputs a clock enable signal synchronous with the system clock, and a self refresh transfer command signal, which is expressed by a combination of states of memory access control signals, to the SDRAM, so as to start up self refresh of the SDRAM. After the self refresh has been started up, the CPU outputs a clock enable mask signal that masks the clock enable signal to switch a clock enable signal to be supplied to the SDRAM from the clock enable signal output from the CPU to a voltage detection signal of a backup power supply. A reset signal then outputs a reset signal to transfer to backup operation.

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Chiba, Japan

Akitoshi Kikuchi