Canon Kabushiki Kaisha

Ikuo Sobue

Yoshiyuki Nakayama

Seishi Ejiri

Hiroaki Matsumoto

Masao Kiguchi

Yasuhiro Matsumoto

Haruo Ishizuka

Katsutoshi Ushida

An image communication apparatus includes a reception unit for receiving image data, a first controller for storing the image data received by the reception unit in a memory, and counting the page number the reception image data, a recording unit for recording an image on a sheet on the basis of the image data stored in the memory, a storage unit having a plurality of trays for sorting and storing sheets on which images are recorded by the recording unit, the plurality of trays having a first tray having a small sheet stackable number and a second tray having a large sheet stackable number, and a second controller for selecting the first tray when the page number counted by the first controller is equal to or smaller than a predetermined page number, and selecting the second tray when the counted page number is larger than the predetermined page number, thereby storing the sheets.

Image communication apparatus having multiple storage units and control based on detected page number

A backup apparatus includes a main body power supply for applying a voltage from a main body to loads during a normal operation, a first backup power supply for applying a power supply voltage to a specific load of the loads when a voltage of the main body power supply drops, a second backup power supply for applying a power supply voltage to the specific load when a voltage of the first backup lower supply drops, a first threshold voltage generator for generating a first threshold voltage generated by the first backup power supply, a second threshold voltage generator for generating a second threshold voltage generated by the second backup power supply, a comparator for comparing the first threshold voltage with the second threshold voltage, a first switch circuit for switching the power supply voltage applied to the specific load from the main body power supply to the first backup power supply when the voltage of the main body power supply drops, and a second switch circuit for switching the power supply voltage applied to the specific load from the first backup power supply to the second backup power supply in accordance with a comparison result from the comparator when the voltage of the first backup power supply drops.

Backup apparatus

The invention relates to an image processing method and apparatus in which, when a binary image is converted to a higher density and interpolated, more effective conversion patterns are proposed and the interpolation upon conversion to higher density is performed by a simple logic operation without using a pattern memory. One original pixel is subdivided into 2.sup.n portions (where n is an integer) in a main scanning direction and/or 2.sup.m portions (where m is an integer) in a subordinate scanning direction, and a density value (or sub-pixel) of the subdivided pixel of a pixel of interest, which has been subdivided, is decided based upon the density value of the original pixel of interest and density values of pixels peripheral thereto. An angle of inclination of a slanted line which is the object of interpolation processing is detected, and the number of sub-pixels, which undergo a density conversion for interpolation processing, is changed in dependence upon the angle of inclination. Alternatively, the width of a slanted line which is the object of interpolation is detected, and the processing density conversion for interpolation is controlled in dependence upon the width of the slanted line. As a result, it is possible to obtain an image in which contour smoothing of the slanted lines of a character image is performed more effectively, with no missing black lines.

Image processing with smooth production of inclined lines and other

An image recording apparatus for recording images on a plurality of types of recording sheets having different sizes, includes a recording device for recording (i) in a first mode in which an image is recorded in a reduced form on a recording sheet of a first size, and (ii) in a second mode in which the image is recorded in a non-reduced form on a recording sheet of a second size, the second size being larger than the first size. A detecting device detects a size of the image to be recorded. A control device (i) compares the image size detected by the detecting device with a predetermined value, and (ii) enables the recording device to record (a) in the first mode when the image size detected by the detecting device is smaller than the predetermined value, and (b) in the second mode when the image size detected by the detecting device is larger than the predetermined value.

Image recording apparatus for recording different sized images on

An image communication apparatus includes a reception unit for receiving image data, a recording unit for recording an image on a sheet on the basis of the image data received by the reception unit, a storage unit having a plurality of trays for sorting and storing sheets on which images are recorded by the recording unit, a determination unit for determining the presence/absence of the sheets stored in the trays, and a controller for sequentially selecting the trays with reference to a predetermined tray to sort and store the sheets on which the images are recorded by the recording unit in the storage unit, and selecting the predetermined tray in accordance with a determination of the absence of the sheets by the determination unit, wherein the determination unit determines that no sheet is present in the trays when it is detected that the sheet is removed and that no sheet is present for a predetermined period of time.

Image communication apparatus having storage unit for storing recorded

An information transmit/receive apparatus comprises a printer having a sheet feed portion and a sheet discharge portion, an original reader having a sheet feed portion and a sheet discharge portion and a sorter having a sheet entrance port which is connected to the sheet discharge portion of the printer via an adapter for coupling the sheet discharge portion and the sheet entrance port together. The adapter has a transparent portion through which the recording sheet passage in the adapter can be visually observed, whereby a jam of a recording sheet in the adapter portion can be easily observed. A control means performs receive and transmit operations.

Information transmit/receive apparatus onto which a sorter can be

An image processing apparatus suitable for use in a laser beam printer includes an input circuit for inputting image data, and a processing circuit for processing the image data input via the input circuit. The processing circuit includes a converter for converting resolution of the image data, and for outputting converted image data. The processing circuit further includes a pulse-width-modulated signal generating circuit for generating a pulse-width-modulated signal in accordance with a pattern of the image data.

Image processing apparatus adaptable for use at variable resolution

A recording system including an image data transmission source for sending image data and a recording apparatus for performing a recording operation on the basis of the image data is provided a relay unit connectable between the image data transmission source and the recording apparatus. The relay unit is adapted to add a specific function to the recorded apparatus, such as increased paper capacity or to change a paper ejection position of a recorded sheet. Moreover, such a relay unit may provide an advantageous transfer serial data during a time interval so as to avoid an interface error.

Relay unit optionally connected to a recording apparatus for adding a

A document reading apparatus incorporating shading correction features has an illumination device for illuminating a document. Drive components move the document relative to the illumination device. Image pickup circuitry converts the image of the document irradiated by the illumination device into an electrical signal. A first stationary reference member is disposed on a reverse side with respect to the document and provides a first reference light to the image pickup circuitry when irradiated by the illumination device. A second stationary reference member is disposed on a front side with respect to the document and provides a second reference light to the image pickup circuitry when irradiated by the illumination device. Control circuitry corrects the electrical signal of the document image from the pickup circuitry in accordance with one of the first and second reference lights picked up by the pickup circuitry.

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Kawasaki, Japan

Ikuo Sobue