Image forming apparatus and image forming method thereof

Abstract

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.

What is claimed is: 
     
         1 . An apparatus comprising:
 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 using the generated multi-bit data.   
     
     
         2 . The apparatus of  claim 1 , wherein the received print data comprise raw data with 1200×1200 dpi (dots per inch) resolution. 
     
     
         3 . The apparatus of  claim 1 , wherein the rendering unit generates bitmap data at 1200×1200 dpi resolution from the received print data. 
     
     
         4 . The apparatus of  claim 1 , wherein the print engine unit has 1200 dpi resolution in a main-scan direction and 600 dpi resolution in a sub-scan direction. 
     
     
         5 . The apparatus of  claim 1 , wherein the data combining unit combines a plurality of successive binary data in a sub-scan direction of a print paper. 
     
     
         6 . The apparatus of  claim 1 , wherein the data combining unit generates 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. 
     
     
         7 . The apparatus of  claim 1 , wherein the print engine unit forms at least one of: white dot, half-size dot, and full-size dot. 
     
     
         8 . The apparatus of  claim 7 , wherein the print engine unit forms the half-size dot with respect to ‘ 01   (2) ’ and ‘ 10   (2) ’ of the 2-bit data. 
     
     
         9 . The apparatus of  claim 7 , wherein the dot formed by the half-size dot has 1200 dpi pitch. 
     
     
         10 . The apparatus of  claim 1 , further comprising:
 a storage unit to store the print data.   
     
     
         11 . An image forming method comprising:
 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 using the generated multi-bit data.   
     
     
         12 . The image forming method of  claim 11 , wherein the received print data comprise raw data with 1200×1200 dpi (dots per inch) resolution. 
     
     
         13 . The image forming method of  claim 11 , wherein the rendering comprises generating bitmap data at 1200×1200 dpi resolution from the received print data. 
     
     
         14 . The image forming method of  claim 11 , wherein the forming an image comprises using a print engine having 1200 dpi resolution in a main-scan direction and 600 dpi resolution in a sub-scan direction. 
     
     
         15 . The image forming method of  claim 11 , wherein the data combining comprises combining a plurality of successive binary data in an advancing direction of a print paper. 
     
     
         16 . The image forming method of  claim 11 , wherein the data combining comprises 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. 
     
     
         17 . The image forming method of  claim 16 , wherein the forming an image comprise forming at least one of: white dot, half-size dot, and full-size dot. 
     
     
         18 . The image forming method of  claim 17 , wherein the forming an image comprises forming the half-size dot with respect to ‘ 01   (2) ’ and ‘ 10   (2) ’ of the 2-bit data. 
     
     
         19 . The image forming method of  claim 17 , wherein the dot formed by the half-size dot has 1200 dpi pitch. 
     
     
         20 . An image forming method, comprising:
 receiving printing data having m×n dpi;   converting the received printing data into reduced size dot in a sub-scanning direction resolution to print out m×n dpi resolution; and   printing the converted printing data out with m×n dpi resolution using a m×½ n dpi print engine unit,   wherein the m is main-scanning direction resolution and the n is sub-scanning direction resolution.   
     
     
         21 . The image forming method of  claim 20 , wherein m=n and m=1200.