Image reading device and method

An image reading method operable in a manually placed document reading mode offered by a manually placed document reading means which reads a document placed on a document table made of transparent glass by means of a scanning carriage which moves at a predetermined speed and an ADF document reading mode offered by an ADF document reading means which reds a document transported by an ADF by means of the scanning carriage which has been in a stopping state, comprising:

• detecting which mode of the manually placed document reading mode and the ADF document reading mode a document to be read is in;
• setting a reading speed for the ADF document reading means defined by a document transportation speed by the ADF to a predetermined first reading speed, upon detection that the document to be read is in the ADF document reading mode;
• and
• setting a reading speed for the manually placed document reading means defined by a moving speed of the scanning carriage to a predetermined second reading speed sufficient to reduce image vibration as a result of the reading by the manually placed document reading means, upon detection that the document to be read is in the manually placed document reading mode,
• wherein said setting to the first reading speed changes the predetermined first reading speed defined by the document transportation speed by the ADF to be a high speed that enables a required number of sheets to be read per unit time, and said setting to the second reading speed changes the predetermined second reading speed defined by the moving speed of the scanning carriage to be a speed slower than the predetermined first reading speed.

An image reading device operable in a manually placed document reading mode offered by a manually placed document reading means which reads a document placed on a document table made of transparent glass by means of a scanning carriage which moves at a predetermined speed and an ADF document reading mode offered by an ADF document reading means which reads a document transported by an ADF by means of the scanning carriage which has been in a stopping state, comprising:

• reading mode detecting means which detects in which mode of the manually placed document reading mode and the ADF document reading mode a document to be read is in;
• first reading-speed setting means which sets a reading speed for the ADF document reading means defined by a document transportation speed by the ADF to a predetermined first reading speed, upon detection by the reading mode detecting means that the document to be read is in the ADF document reading mode;
• and
• second reading-speed setting means which sets a reading speed for the manually placed document reading means defined by the moving speed of the scanning carriage to a predetermined second reading speed slower than the predetermined first reading speed for the ADF document reading means, upon detection by the reading mode detecting means that the document to be read is in the manually placed document reading mode,
• wherein the first reading-speed setting means changes the predetermined first reading speed defined by the document transportation speed by the ADF to be a high speed that enables a required number of sheets to be read by unit time, and the second reading-speed setting means changes the predetermined second reading speed defined by the moving speed of the scanning carriage to be a speed slower than the predetermined first reading speed and sufficient for the reduction of image vibration as a result of the reading by the manually placed document reading means.

An image reading method operable in a manually placed document reading mode offered by a manually placed document reading means which reads a document placed on a document table made of transparent glass by means of a scanning carriage which moves at a predetermined speed and an ADF document reading mode offered by an ADF document reading means which reads a document transported by an ADF by means of the scannig carriage which has been in a stopping state, comprising;

• detecting which mode of the manually placed document reading mode and the ADF document reading mode a document to be read is in,
• setting a reading speed for the ADF document reading means defined by a document transportation speed by the ADF to a predetermined first reading speed upon detection that the document to be read is in the ADF document reading mode;
• and
• setting a reading speed for the manually placed document reading means, defined by a moving speed of the scanning carriage to a predetermined second reading speed slower than the reading speed for the ADF document reading means, upon detection that the document to be read is in the manually placed document reading mode,
• wherein said setting to the first reading speed changes the predetermined first reading speed defined by the document transportation speed by the ADF to be a high speed that enables a required number of sheets to be read by unit time, and said setting to the second reading speed changes the predetermined second reading speed defined by the moving speed of the scanning carriage to be a speed slower than the predetermined first reading speed and sufficient for the reduction of image vibration as a result of the reading by the manually placed document reading means.

An image reading device operable in a manually placed document reading mode offered by a manually placed document reading means which reads a document placed on a document table made of transparent glass by means of a scanning carriage which moves at a predetermined speed and an ADF document reading mode offered by an ADF document reading means which reads a document transported by an ADF by means of the scanning carriage which has been in a stopping state, comprising:

• reading mode detecting means which detects in which mode of the manually placed document reading mode and the ADF document reading mode a document to be read is in;
• and
• reading speed changing means which switches between a predetermined first reading speed for the manually placed document reading means defined by a document transportation speed by the ADF set upon the detection by the reading mode detecting means that the document to be read is in the manually placed document reading mode and a predetermined second reading speed for the ADF document reading means defined by a moving speed of the scanning carriage set upon the detection that the document to be read is in the ADF document reading mode,
• wherein the reading speed changing means changes the predetermined first reading speed defined by the document transportation speed by the ADF to be a high speed that enables a required number of sheets to be read by unit time, and changes the predetermined second reading speed defined by the moving speed of the scanning carriage to be a speed slower than the predetermined first reading speed and sufficient for the reduction of image vibration as a result of the reading by the manually placed document reading means.

An image reading method operable in a manually placed document reading mode offered by a manually placed document reading means which reads a document placed on a document table made of transparent glass by means of a scanning carriage which moves at a predetermined speed and an ADF document reading mode offered by an ADF document reading means which reads a document transported by an ADF by means of the scanning carriage which has been in a stopping state, comprising:

• detecting which mode of the manually placed document reading mode and the ADF document reading mode a document to be read is in;
• and
• changing between a predetermined first reading speed of the manually placed document reading means defined by a document transportation speed by the ADF set upon the detection that the document to be read is in the manually placed document reading mode and a predetermined second reading speed of the ADF document reading means defined by a moving speed of the scanning carriage set upon the detection that the document to be read is in the ADF document reading mode,
• wherein said changing the first reading speeds changes the predetermined first reading speed defined by the document transportation speed by the ADF to be high speed that enables a required number of sheets to be read by unit time, and changes the predetermined second reading speed defined by the moving speed of the scanning carriage to be a speed slower than the predetermined first reading speed and sufficient for the reduction of image vibration as a result of the reading by the manually placed document reading means.