Image reading apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorsYusuke Hashizume, Sueo Ueno
Life of this patent
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Abstract
An image reading apparatus has a photoelectric converting unit composed of a color line sensor and a monochromatic line sensor. In a color read mode, the image reading apparatus starts reading a document image at a color read start position. In a monochromatic read mode, the image reading apparatus starts reading a document image at a monochromatic read start position.
Claims34
An image reading apparatus which reads an image from a document placed on a document glass, in multiple colors or monochromatically, the apparatus comprising:
- a photoelectric converting unit composed of a color line sensor and a monochromatic line sensor;
- a scanning section in which an optical system guiding light from the document on the document glass to the photoelectric converting unit is mounted;
- a driving mechanism which moves the scanning section in a sub-scanning direction relative to the document on the document glass;
- and
- a control section which uses the color line sensor to start loading image data if the image is read, in multiple colors, from the document placed on the document glass and when a scan position of the scanning section moved by the driving mechanism in the sub-scanning direction reaches a color read start position, and which uses the monochromatic line sensor to start loading image data if the image is read monochromatically from the document placed on the document glass and when the scan position of the scanning section moved by the driving mechanism in the sub-scanning direction reaches a monochromatic read start position different from the color read start position.
An image reading apparatus which reads an image from a document in multiple colors or monochromatically, the apparatus comprising:
- a document feeding section that conveys the document placed on a document feeding table;
- a photoelectric converting unit composed of a color line sensor and a monochromatic line sensor;
- a scanning section in which an optical system guiding light from the document conveyed by the document feeding section to the photoelectric converting unit is mounted;
- a driving mechanism which moves the scanning section;
- and
- a control section which uses the driving mechanism to move the scanning section from a predetermined standby position to a color read position if the image is read from the document conveyed by the document feeding section in a color read mode in which the color line sensor reads the image, the control section using the driving mechanism to move the scanning section from the predetermined standby position to a monochromatic read position if the image is read from the document conveyed by the document feeding section in a monochromatic read mode in which the monochromatic line sensor reads the image.
An image reading apparatus which reads an image from a document in multiple colors or monochromatically, the apparatus comprising:
- a document feeding section that conveys the document placed on a document feeding table;
- a photoelectric converting unit composed of a color line sensor and a monochromatic line sensor;
- a scanning section in which an optical system guiding light from a read surface of the document conveyed from the document feeding section to each line sensor of the photoelectric converting unit is mounted;
- a driving mechanism which moves the scanning section;
- and
- a control section which uses the driving mechanism to move the scanning section from a predetermined standby position to a read position set on the basis of a location of each line sensor with respect to the read surface of the document conveyed by the document feeding section as well as a sensitivity of each line sensor if the image is read from the document conveyed by the document feeding section, in multiple colors or monochromatically.
A method of reading an image from a document placed on a document glass, in multiple colors or monochromatically, the method comprising:
- causing a driving mechanism to move a scanning section in a sub-scanning direction relative to the document on the document glass, an optical system being mounted in the scanning section and guiding light from the document on the document glass to a photoelectric converting unit composed of a color line sensor and a monochromatic line sensor;
- if the image is read, in multiple colors, from the document placed on the document glass, using the color line sensor to start loading image data when a scan position of the scanning section moved by the driving mechanism in the sub-scanning direction reaches a color read start position;
- and
- if the image is read monochromatically from the document placed on the document glass, using the monochromatic line sensor to start loading image data when the scan position of the scanning section moved by the driving mechanism in the sub-scanning direction reaches a monochromatic read start position different from the color read start position.
An image reading method used for an image reading apparatus having a document feeding section that conveys the document placed on a document feeding table, a photoelectric converting unit composed of a plurality of line sensors, a scanning section in which an optical system guiding light from the document conveyed by the document feeding section to the photoelectric converting unit is mounted, and a driving mechanism which moves the scanning section, the method comprising:
- if the image is read from the document conveyed by the document feeding section in a color read mode, using the driving mechanism to move the scanning section from a predetermined standby position to a color read position and then reading the image from the document using the color line sensor included in the plurality of the line sensors constituting the photoelectric converting unit;
- if the image is read from the document conveyed by the document feeding section in a monochromatic read mode, using the driving mechanism to move the scanning section from the predetermined standby position to a monochromatic read position and then reading the image from the document using the monochromatic line sensor included in the plurality of the line sensors constituting the photoelectric converting unit.
An image reading method used for an image reading apparatus having a document feeding section that conveys the document placed on a document feeding table, a photoelectric converting unit composed of a plurality of line sensors, a scanning section in which an optical system guiding light from the document conveyed by the document feeding section to each line sensor of the photoelectric converting unit is mounted, and a driving mechanism which moves the scanning section, the method comprising:
- if the image is read from the document conveyed by the document feeding section, in multiple colors or monochromatically, the driving mechanism is used to move the scanning section from a predetermined standby position to a read position set on the basis of a location of each line sensor with respect to the read surface of the document conveyed by the document feeding section as well as a sensitivity of each line sensor, and then the image is read from the document using the color line sensor or monochromatic line sensor included in the plurality of line sensors constituting the photoelectric converting unit.
Dependencies are inferred from the claim text.