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Image forming apparatus and image forming method thereof

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Image forming apparatus and image forming method thereof


An image forming apparatus is provided. The image forming apparatus includes a communication interface unit which receives print data, a rendering unit which converts the received print data into a bitmap image by rendering, a binarization unit which generates binary data by carrying out halftoning with respect to the bitmap image, a data combining unit which generates multi-bit data by combining a plurality of successive binary data of the generated binary data, and a print engine which forms an image on a print paper using the generated multi-bit data.
Related Terms: Binary Binary Data Bitmap Rendering

Browse recent Samsung Electronics Co., Ltd. patents - Suwon-si, KR
USPTO Applicaton #: #20140168667 - Class: 358 12 (USPTO) -


Inventors: Kyeong-man Kim

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The Patent Description & Claims data below is from USPTO Patent Application 20140168667, Image forming apparatus and image forming method thereof.

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CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation application of U.S. Ser. No. 13/031,819 filed in the United States on Feb. 22, 2011, and is related to, and claims priority benefit of Korean Patent Application No. 10-2010-0089874, filed on Sep. 14, 2010, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference.

BACKGROUND

1. Field

Apparatuses and methods consistent with the disclosure provided herein relate to an image forming apparatus and an image forming method thereof, and more particularly to an image forming apparatus and an image forming method thereof which provide outputs at 1200×1200 dpi resolution by forming part of combined data as half-size dots.

2. Description of the Related Art

An image forming apparatus operates to print out print data generated at a terminal, such as a computer, onto a print medium. The examples of the image forming apparatus may include a copier, a printer, a facsimile, or a multi function peripheral (MFP) which integrates therein the above-mentioned functions.

Conventionally, when received print data has higher resolution than the resolution supported by the image forming apparatus, the image forming apparatus converts print data to a lower resolution before carrying out print job.

For example, if print data at 1200×1200 dpi resolution is received at the image forming apparatus which supports 1200×600 dpi resolution, conventionally, the image forming apparatus carries out rendering and binarization with respect to the received data at 1200 dpi, converts the binarized data into data at 600 dpi at final step and carries out the print job. This means that the conventional image apparatus outputs resolution of 600×600 dpi.

Accordingly, the conventional image forming apparatus cannot support print jobs that require resolution higher than 600 dpi, such as print job related to CAD, blueprint, or fingerprint. Accordingly, an image forming method is necessary, which is capable of providing output at resolution as high as 1200 dpi in any circumstances.

SUMMARY

Exemplary embodiments overcome the above disadvantages and other disadvantages not described above. Also, the embodiments are not required to overcome the disadvantages described above, and an exemplary embodiment may not overcome any of the problems described above.

According to one embodiment, an image forming apparatus and an image forming method are provided, which provide output at 1200×1200 dpi resolution by combining binary data and forming part of the composited data as half-size dots.

According to an exemplary embodiment, an image forming apparatus may include a communication interface unit which receives print data, a rendering unit which converts the received print data into a bitmap image by rendering, a binarization unit which generates binary data by carrying out halftoning with respect to the bitmap image, a data combining unit which generates multi-bit data by combining a plurality of successive binary data of the generated binary data, and a print engine which forms an image on a print paper using the generated multi-bit data.

The received print data may be raw data with 1200×1200 dpi (dots per inch) resolution.

The rendering unit may generate bitmap data at 1200×1200 dpi resolution from the received print data.

The print engine unit may have 1200 dpi resolution in a main-scan direction and 600 dpi resolution in a sub-scan direction.

The data combining unit may combine a plurality of successive binary data in an advancing direction of the print paper.

The data combining unit may generate at least one 2-bit data from among ‘00(2)’, ‘01(2)’, ‘10(2)’ and ‘11(2)’, by combining two binary data in a vertical direction from among the binary data.

The print engine unit may form at least one of: white dot, half-size dot, and full-size dot.

The print engine unit may form the half-size dot with respect to ‘01(2)’ and ‘10(2)’ of the 2-bit data.

The dot formed by the half-size dot may have 1200 dpi pitch.

In another exemplary embodiment, an image forming method of an image forming apparatus is provided, in which the image forming method may include receiving print data, rendering to convert the received print data into a bitmap image, halftoning with respect to the bitmap image to generate binary data, data combining to generate multi-bit data by combining a plurality of successive binary data of the generated binary data, and forming an image on a print paper using the generated multi-bit data.

The received print data may be raw data with 1200×1200 dpi (dots per inch) resolution.

The rendering may include generating bitmap data at 1200×1200 dpi resolution from the received print data.

The forming an image may include using a print engine having 1200 dpi resolution in a main-scan direction and 600 dpi resolution in a sub-scan direction.

The data combining may include combining a plurality of successive binary data in an advancing direction of the print paper.

The data combining may include generating at least one 2-bit data from among ‘00(2)’, ‘01(2)’, ‘10(2)’ and ‘11(2)’, by combining two binary data in a vertical direction from among the binary data.

The forming an image may include forming at least one of: white dot, half-size dot, and full-size dot.

The forming an image may include forming the half-size dot with respect to ‘01(2)’ and ‘10(2)’ of the 2-bit data.

The dot formed by the half-size dot may have 1200 dpi pitch.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or other aspects will be more apparent by describing certain exemplary embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a block diagram of an image forming apparatus according to an exemplary embodiment;

FIGS. 2 and 3 are views provided to explain changes in print data according to an exemplary embodiment;

FIG. 4 is a view illustrating property of a laser signal in a main-scan direction;

FIGS. 5 to 8 are views illustrating property of a laser signal in a sub-scan direction; and

FIG. 9 is a flowchart provided to explain an image forming method according to an exemplary embodiment.

DETAILED DESCRIPTION

Certain exemplary embodiments will now be described in greater detail with reference to the accompanying drawings.

In the following description, same drawing reference numerals are used for the same elements even in different drawings. The matters defined in the description, such as detailed construction and elements, are provided to assist in a comprehensive understanding embodiments. Accordingly, it is apparent that the exemplary embodiments can be carried out without those specifically defined matters. Also, well-known functions or constructions are not described in detail since they would obscure the description with unnecessary detail.

FIG. 1 is a block diagram of an image forming apparatus according to an exemplary embodiment.

Referring to FIG. 1, an image forming apparatus 100 includes a communication interface unit 110, a storage unit 120, a user interface unit 130, a rendering unit 140, a binarization unit 150, a data combining unit 160, a print engine unit 170, and a control unit 180.

The communication interface unit 110 is provided to connect the image forming apparatus 100 to a print control terminal 10, via not only local area network (LAN) and Internet, but also universal serial bus (USB) port. The communication interface unit 110 may receive print data from the print control terminal 10. The received print data may have 1200×1200 dpi resolution, or the data may be in a form of vector data.

The communication interface unit 110 may receive a resolution option from the print control terminal 10. To be specific, a user may set a print resolution with a print driver which is installed on the print control terminal 10. Accordingly, if the user sets 1200 dpi resolution output with the print driver, the print control terminal 10 may transfer to the image forming apparatus 100 “1200 dpi resolution option”, thus indicating that the output has to be carried out at 1200 dpi resolution.

In actual implementation, the image forming apparatus 100 may be set to carry out 1200 dpi resolution print job only upon receipt of “1200 dpi resolution option” from the print control terminal 10. However, the image forming apparatus 100 may also carry out 1200 dpi resolution print job without receiving “1200 dpi resolution option”, if the received print data has a 1200×1200 dpi resolution.

The storage unit 120 stores therein print data. To be specific, the storage unit 120 stores therein the print data received via the communication interface unit 110. The storage unit 120 may additionally store therein data processed at the rendering unit 140, the binarization unit 150 and the data combining unit 160 (e.g., bitmap data, binary data, multi-bit data, or the like). Meanwhile, the storage unit 120 may be implemented as an internal storage medium of the image forming apparatus, or an external storage medium, such as a removable disk including USB memory, or Web server via network. In one embodiment, only one storage unit 120 is illustrated and explained. However, this is written only for illustrate purpose, and accordingly, the storage unit 120 may be divided into a memory for data storage, memory for command processing, or the like.

The user interface unit 130 includes a plurality of function keys with which a user sets or selects a variety of functions supported by the image forming apparatus, and may display various information provided by the image forming apparatus 100. The user interface unit 130 may be implemented as a combination of a monitor and a mouse, or as a device such as touchpad which is capable of both inputting and outputting.

The rendering unit 140 converts received print data into bitmap image by rendering. To be specific, the rendering unit 140 may generate a bitmap image by carrying out rendering with respect to the print data received from the print control terminal 10. Herein, the rendering unit 140 may convert raw data at a resolution of 1200×1200 dpi into bitmap image with a 1200×1200 dpi resolution, and also convert raw data or vector data at resolution lower than 1200×1200 dpi into bitmap image at a 1200×1200 dpi resolution. The generated bitmap image may be stored at the storage unit 120 temporarily.

The binarization unit 150 generates binary data by carrying out halftoning with respect to the bitmap image. To be specific, the binarization unit 150 carries out halftoning including, for example, screening or dithering with respect to the bitmap image rendered at the rendering unit 140, to thus generate binary data (1200×1200×1 bit). The generated binary data may be stored temporarily at the storage unit 120. To be specific, the storage unit 120 may store the generated binary data by writing the generated binary data over the previously stored bitmap image, or alternatively, store the generated binary data at a separate location.



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stats Patent Info
Application #
US 20140168667 A1
Publish Date
06/19/2014
Document #
14189020
File Date
02/25/2014
USPTO Class
358/12
Other USPTO Classes
International Class
06K15/02
Drawings
10


Binary
Binary Data
Bitmap
Rendering


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