# US 5,351,074 A · Apparatus for forming a color image using two memories

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- Number: US 5,351,074 A
- Document ID: US5351074A
- Status: Granted
- Kind: A
- Application number: 07/959,555
- Filed: 1992-10-13
- Granted: 1994-09-27
- Earliest claimed: 1988-01-19
- Assignees: Canon Kabushiki Kaisha
- Inventors: Toshihiro Kadowaki; Masanori Sakai
- Web page: https://patentgrep.com/patent/US5351074A

## CPC

- H04N 1/387: Composing, repositioning or otherwise {geometrically} modifying originals
- H04N 1/46: Colour picture communication systems
- H04N 1/508: {using the same reproducing head for two or more colour components}
- Y10S 347/90: Data processing for electrostatic recording
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

There is disclosed an apparatus comprising: an input circuit for inputting at least one of the coded character information, coded figure information, and bit image information; a memory to store an image; an image developing circuit for developing the information input by the input circuit into the image memory with respect to one output color component; and an image forming circuit to form one output color component image in accordance with the value of the image data in the memory, wherein a color image can be formed by repeating the image development and the image formation with respect to a plurality of output color components.

## Claims

### Claim 1

An interface for inputting color image information into a color printer, comprising:
a first memory for storing the color image information;
a second memory provided separately from said first memory, for storing the color image information; and
control means for storing the image information in sequence into said first and second memories,
wherein said first and second memories store the same kind of color information, and said control means stores the image information alternatively into said first and said second memories synchronously with printing operation of the color printer.

### Claim 2 (depends on 1)

An interface according to claim 1, further comprising:
an input section for inputting of the color information into said interface responsive to a command.

### Claim 3 (depends on 2)

An interface according to claim 2, wherein said input section is also structured and arranged for inputting of the command, converted into image information.

### Claim 4 (depends on 1)

An interface according to claim 1, further comprising:
selecting means for selecting between outputs from said first and said second memories.

### Claim 5 (depends on 1)

An interface according to claim 1, wherein the color printer is an electronic photographic printer.

### Claim 6 (depends on 1)

An interface according to claim 1, wherein said first and second memories have, respectively, memory capacities of a page.

### Claim 7 (depends on 1)

An interface according to claim 1, wherein the color image information includes a primary-color component.

### Claim 8 (depends on 1)

An interface according to claim 1, wherein said control means stores the image information alternatively into said first and second memories synchronously with operation of the color printer.