Canon Kabushiki Kaisha

Yukio Inagi, Isaka

Koichiro Akimoto

Yasuhito Suzuki

Kazuyuki Honda

Hajime Ohshima

Makoto Takeuchi

Tetsuya Morita

Yoji Serizawa

Seiji Uchiyama

Kazuro Yamada

Akio Noguchi

Yukihide Ushio

Masahiko Sakai

Masahiko Murata

Hiroshi Yamano

Junichi Kimizuka

Haruo Ishizuka

Katsumi Masaki

Tsutomu Kubota

Yoshifumi Okamoto

Masaru Igarashi

Masayoshi Suzuki

Haruo Uchiyama

Kazuo Hoshido

An image data control apparatus includes a memory for storing image data and a reader for reading the image data from the memory. The reader can operate in a first mode for erasing the image data in association with the reading of the image data from the memory and can operate in a second mode for restoring the read image data in the storage means in association with the reading of the image data from the memory.

Image data control apparatus

Output apparatus that converts vector font data into dot font data in accordance with a change in output resolution has a first memory to store dot font data and a second memory to store vector font data. A change instruction circuit can instruct a change of output resolution. Whether dot font data of an output resolution corresponding to the change exists in the first memory is discriminated and a converter converts the vector font data in the second memory into the dot font data according to the changed output resolution on the basis of the instruction from the change instruction circuit and the result of the discrimination.

Output apparatus with changeable font resolution

An image forming apparatus comprises image information which outputs a sync signal and means generated image information synchronously with the sync signal; image forming means form an image on the basis of the image information at either one of a plurality of resolutions and which generates a sync request signal to request a transmission of the sync signal; and a resolution changeover means. When the image forming unit received the resolution change over request signal before the sync request signal is generated, the image forming unit executes the switching operation of the resolution, and if the image forming unit received the resolution changeover request signal after the sync request signal had been generated, the image forming unit does not execute the switching operation of the resolution.

Image forming apparatus having improved resolution switching capabilities

An image forming apparatus comprises image information which outputs a sync signal and generated image information synchronously with the sync signal; an image forming apparatus forms an image on the basis of the image information at either one of a plurality of resolutions and which generates a sync request signal to request a transmission of the sync signal; and a resolution changeover means. When the image forming unit received the resolution change over request signal before the sync request signal is generated, the image forming unit executes the switching operation of the resolution, and if the image forming unit received the resolution changeover request signal after the sync request signal had been generated, the image forming unit does not execute the switching operation of the resolution.

Image forming apparatus having plural printing resolutions

There is disclosed a data processing apparatus capable of providing a desired output print regardless of the size of print data by modifying the density of the print. For this purpose there is provided a processing unit for determining the print density based on data associated with the printing medium used in a printing unit.

Data processing apparatus

An image forming apparatus includes a print data input device for inputting print data, a processor for performing data-processing of the print data, and an output device for outputting the processed print data as image data to an image forming unit. The processor includes a first setting device for setting line direction data representing a line direction, a second setting device for setting character direction data representing character direction, and a third setting device for setting line feed direction data representing line feed direction. The processor determines a processing mode of the inputted print data on the basis of the line direction data, the character direction data, and the line feed direction data.

Image recording apparatus capable of forming image outputs in various

Printing is performed with the higher one of the two resolutions designated for text data and image data if these resolutions are different from each other. If in this case the resolution designated for the text data is changed, character patterns based the an optimum number of constituent dots are selected for printing of characters of the designated size in accordance with the text data. If the resolution of the image data is changed, the image data is interpolated.

Printing controller for printing at selected resolutions

An image recording apparatus has image forming means for forming an image on a record medium. The image forming means determines a record mode in accordance with designated page direction and print direction.

Image recording apparatus

An apparatus for recording an image on a record medium includes an image forming device which operates in a plurality of record modes, and a control device for determining the record mode to be used on the basis of inputted page direction information and inputted print direction information.

A beam scanning device provided with a beam generator to generate beam, a deflector to deflect the beam, and a beam detector to detect the deflected beam. In this beam scanning device, while the beam detector is detecting the beam with a definite cycle, the beam generator is so controlled that the beam may be generated therefrom with such definite cycle, and the beam is constantly generated from the beam generator when the beam detector becomes unable to detect the beam with such definite cycle. By thus controlling the beam generation, the beam detection can be carried out rapidly, even when the cycle for the beam detection shifts or noises enter during the beam detection.

Beam scanning device

A signal converter for use in a recording or displaying device which can be used to change the size of characters to be recorded or displayed. By using instruction signals or enlargement codes, a part (for example the upper or lower half) of a character field and hence a corresponding part of a character may be enlarged, and then the enlarged upper and lower halves are combined to form an enlarged character for recording or display. Any number of characters in a row of characters may be changed in size by using the signal converter, and specified portions of different characters may be enlarged and then combined.

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BOTH OF, Japan

Yukio Inagi, Isaka