Image reading device and image forming apparatus comprising the same
AssigneeKyocera Mita Corporation
InventorsMasayoshi Takahashi, Shinobu Satonaka, Kensuke Fujihara
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Abstract
An image reading device including an image sensor for optically reading a document and outputting an electric signal, a period control circuit for controlling the period of a horizontal synchronizing signal in order to change a time period during which charge is stored in the image sensor, and a scanning speed control circuit for controlling the scanning speed of the document to be a speed conforming to the period of the horizontal synchronizing signal. The horizontal synchronizing signal and the scanning speed are variably set to values corresponding to an image reading mode, for example.
Claims18
An image reading device comprising:
- an image sensor for scanning a surface of a document, optically reading an image formed on the surface of the document, and outputting an electric signal corresponding to the read image;
- a period control circuit for controlling the period of a horizontal synchronizing signal to be fed to the image sensor in order to change a time period during which charge is stored in the image sensor;
- and
- a scanning speed control circuit for controlling the scanning speed for the surface of the document by the image sensor to be a speed conforming to the period of the horizontal synchronizing signal.
An image forming apparatus comprising:
- an image sensor for scanning a surface of a document, optically reading an image formed on the surface of the document, and outputting an electric signal corresponding to the read image;
- a period control circuit for controlling the period of a horizontal synchronizing signal to be fed to the image sensor in order to change a time period during which charge is stored in the image sensor;
- a scanning speed control circuit for controlling the scanning speed for the surface of the document by the image sensor to be a speed conforming to the period of the horizontal synchronizing signal;
- and
- a print section for forming on a sheet an image corresponding to an output signal of the image sensor.
Dependencies are inferred from the claim text.