| 摘要 |
An image reader of hand scanner type has a transparent support for fixing an original on a table in position, a reading head, LEDs for irradiating the original, an imaging sensor array for reading the original image further LEDs and sensor for detecting the head scanning position, a control circuit including a turn on circuit and/or an alarm control circuit, and a display LED. The LEDs for image reading are turned on only during image reading. When manual scanning is performed too fast and further signal processing cannot be performed, this can be signalled to the operator by the display LED.
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