Image-forming apparatus having function of preventing unevenness of image formed on recording medium

An apparatus for forming an image onto a photosensitive recording medium, said apparatus comprising:

• a light source, including a plurality of light-emitting elements aligned within a predetermined width for emitting a corresponding plurality of light beams;
• an exposure-controlling section to individually control respective intensities of respective ones of the light beams emitted by said plurality of light-emitting elements;
• a main-scanning mechanism to move one of said photosensitive recording medium and said light source in a main-scanning direction;
• is a sub-scanning mechanism to move one of said light source and said photosensitive recording medium in a sub-scanning direction;
• and
• a memory section to store light-intensity compensation data for each of said plurality of light-emitting elements that emit the plurality of controlled light beams;
• wherein said image is formed by simultaneously exposing said light beams onto said photosensitive recording medium, and in order to compensate for possible unevenness in said image generated in said sub-scanning direction due to duplications of main-scanning lines, said light-intensity compensation data is provided to enable generation of a density-difference equivalent to a density-difference between said image-unevenness and a preset target density;
• wherein said exposure-controlling section controls each of said plurality of light-emitting elements that emit the plurality of controlled light beams based on said light-intensity compensation data corresponding thereto, so that said intensities of said controlled light beams substantially coincide with preset corresponding target intensities;
• wherein said light beams emitted by said plurality of light-emitting elements comprise light beams having different wavelengths corresponding to colors of cyan, magenta and yellow, and each color of cyan, magenta and yellow is developed on said photosensitive recording medium to form a full color image on said photosensitive recording medium;
• and
• wherein said exposure-controlling section comprises a recognizer for recognizing light beams corresponding to colors of cyan and magenta, and said exposure-controlling section only controls the intensities of light beams corresponding to said colors of cyan and magenta.

An apparatus for forming an image onto a photosensitive recording medium, said apparatus comprising:

• a light source, including a plurality of light-emitting elements aligned within a predetermined width for emitting a corresponding plurality of light beams;
• an exposure-controlling section to individually control respective intensities of respective ones of the light beams emitted by said plurality of light-emitting elements;
• and
• a memory section to store light-intensity compensation data for each of said plurality of light-emitting elements that emit the plurality of controlled light beams;
• wherein said image is formed by simultaneously exposing said light beams onto said photosensitive recording medium;
• and
• wherein said light-intensity compensation data varies in accordance with changes of density-characteristics of developed color versus exposing light-intensity with respect to said photosensitive recording medium, and said exposure-controlling section controls each of said plurality of light-emitting elements that emit the plurality of controlled light beams based on said light-intensity compensation data corresponding thereto, so that said intensities of said controlled light beams substantially coincide with preset corresponding target intensities;
• wherein said light beams emitted by said plurality of light-emitting elements comprise light beams having different wavelengths corresponding to colors of cyan, magenta and yellow, and each color of cyan, magenta and yellow is developed on said photosensitive recording medium to form a full color image on said photosensitive recording medium;
• and
• wherein said exposure-controlling section comprises a recognizer for recognizing light beams corresponding to colors of cyan and magenta, and said exposure-controlling section only controls the intensities of light beams corresponding to said colors of cyan and magenta.

An apparatus for forming an image onto a photosensitive recording medium, said apparatus comprising:

• a light source, including a plurality of light-emitting elements aligned within a predetermined width for emitting a corresponding plurality of light beams;
• an exposure-controlling section to individually control a respective intensity of at least one controlled light beam of the light beams emitted by said plurality of light-emitting elements;
• and
• a memory section to store light-intensity compensation data for at least one of said light emitting elements that emits the at least one controlled light beam, said at least one of said light emitting elements comprising at least one of:
• one of said plurality of light-emitting elements located at one end of said predetermined width, and two of said plurality of light-emitting elements located at respective ends of said predetermined width;
• wherein said image is formed by simultaneously exposing said light beams onto said photosensitive recording medium;
• wherein said exposure-controlling section controls the at least one of said plurality of light-emitting elements that emits the at least one controlled light beam based on said light-intensity compensation data corresponding thereto, so that said respective intensity of said at least one controlled light beam substantially coincides with a preset corresponding target intensity;
• wherein wavelengths of said light beams correspond to colors of cyan magenta and yellow, and each color of cyan, magenta and yellow is developed on said photosensitive recording medium to form a full color image on said photosensitive recording medium;
• and
• wherein said exposure-controlling section comprises a recognizer for recognizing a light beam corresponding to a color of one of cyan and magenta from said light beams located at respective ends of said predetermined width, and said exposure-controlling section only controls the intensity of a light beam corresponding to said color of one of cyan and magenta.