Ink jet recording head having means for controlling ink droplets

An ink jet recording apparatus for jetting ink droplets to a recording medium and forming a dot image on said recording medium, said ink jet recording apparatus comprising:

• ink jetting orifices from which ink droplets are jetted;
• ink paths connected to said ink letting orifices, said ink paths being filled with ink;
• energy applying portions, provided in said ink paths, for applying energy to the ink in said ink paths on demand so that bubbles are generated in the ink, ink droplets being jetted from said ink jetting orifices by the bubbles generated in the ink in said ink paths;
• and
• control means for controlling said energy applying portions in accordance with image information representing an image to be formed on said recording medium so that the image includes pixels each of which is formed of one or a plurality of ink droplets, a maximum number of ink droplets for each pixel being controlled based on a kind of recording medium,
• wherein the maximum number of ink droplets for each pixel of the image depends on a kind of the recording medium on which the image is to be formed, and wherein a degree of expansion of an ink dot on the recording medium depends on the kind of recording medium.

An ink jet recording apparatus for jetting ink droplets to a recording medium and forming a dot image on said recording medium, said ink jet recording apparatus comprising:

• ink jetting orifices from which ink droplets are jetted;
• ink paths connected to said ink jetting orifices, said ink paths being filled with ink;
• energy applying portions, provided in said ink paths, for applying energy to the ink in said ink paths on demand so that bubbles are generated in the ink, ink droplets being jetted from said ink jetting orifices by the bubbles generated in the ink in said ink paths;
• and
• control means for controlling said energy applying portions in accordance with image information representing an image to be formed on said recording medium so that the image includes pixels each of which is formed of one or a plurality of ink droplets, a maximum number of ink droplets for each pixel being controlled based on a kind of recording medium,
• wherein a center of each pixel which is formed of one or a plurality of ink droplets is approximately on a predetermined position on said recording medium.

An ink jet recording apparatus for letting ink droplets to a recording medium and forming a dot image on said recording medium, said ink let recording apparatus comprising:

• ink jetting orifices from which ink droplets are jetted;
• ink paths connected to said ink letting orifices, said ink paths being filled with ink;
• energy applying portions, provided in said ink paths, for applying energy to the ink in said ink paths on demand so that bubbles are generated in the ink, ink droplets being jetted from said ink jetting orifices by the bubbles generated in the ink in said ink paths;
• and
• control means for controlling said energy applying portions in accordance with image information representing an image to be formed on said recording medium so that the image includes pixels each of which is formed of one or a plurality of ink droplets, a maximum number of ink droplets for each pixel being controlled based on a kind of recording medium,
• wherein pixels each of which are formed of one or a plurality of ink droplets are arranged at approximately constant intervals in the image.

An ink jet recording apparatus for letting ink droplets to a recording medium and forming a dot image on said recording medium, said ink jet recording apparatus comprising:

• ink jetting orifices from which ink droplets are jetted;
• ink paths connected to said ink jetting orifices, said ink paths being filled with ink;
• energy applying portions, provided in said ink paths, for applying energy to the ink in said ink paths on demand so that bubbles are generated in the ink, ink droplets being jetted from said ink jetting orifices by the bubbles generated in the ink in said ink paths;
• and
• control means for controlling said energy applying portions in accordance with image information representing an image to be formed on said recording medium so that the image includes pixels each of which is formed of one or a plurality of ink droplets, a maximum number of ink droplets for each pixel being controlled based on a kind of recording medium,
• wherein a number of ink droplets corresponding to image data for a pixel is controlled so that a relationship between an actual density of the pixel in the image on said recording medium and the image data for the pixel is linear.