Optical reading device, control method for an optical reading device, and storage medium
AssigneeSeiko Epson Corporation
InventorHiroyuki Motoyama
Life of this patent
Estimating the term…
Abstract
When optically scanning a medium, scanning can proceed immediately even if the size of the medium is unknown. Before or when an optical reading device starts scanning to read all of a recording medium, the CPU 40 sets a scan block of a size that can always be scanned based on the output of media edge sensors 47 and the distance from the scanning position of the optical reading device to the detection position of the media edge sensors 47, and then scans the set scan block.
Claims15
An optical reading device comprising:
- a transportation unit that conveys a medium to be scanned;
- an optical reading unit that is disposed to the transportation path of the medium and optically reads the medium;
- a medium detection unit that detects the medium on the transportation path;
- a control unit that controls the transportation unit and the optical reading unit;
- and
- a storage unit that stores the distance from the scanning position of the optical reading unit to the detection position of the medium detection unit;
- wherein before or when the scanning operation of the optical reading unit starts the control unit sets a scannable range that can be scanned based on the distance from the scanning position of the optical reading unit to the detection position of the medium detection unit stored in the storage unit and detection of the conveyed medium by the medium detection unit, and scans this scannable range.
A method of controlling an optical reading device that has a control unit, a transportation unit that conveys a medium to be scanned, an optical reading unit that is disposed to the transportation path of the medium and optically reads the medium, a medium detection unit that detects the medium on the transportation path, and a storage unit that stores the distance from the scanning position of the optical reading unit to the detection position of the medium detection unit,
- the control method comprising steps of:
- setting, before or when the scanning operation of the optical reading unit starts, a scannable range that can be scanned based on the distance from the scanning position of the optical reading unit to the detection position of the medium detection unit stored in the storage unit and detection of the conveyed medium by the medium detection unit;
- and
- scanning this scannable range.
A non-transitory recording medium storing a program that can be executed in an optical reading device having a control unit by the control unit, wherein:
- the optical reading device has a transportation unit that conveys a medium to be scanned, an optical reading unit that is disposed to the transportation path of the medium and optically reads the medium, a medium detection unit that detects the medium on the transportation path at a position on the transportation path separated from the scanning position of the optical reading unit, and a storage unit that stores the distance from the scanning position of the optical reading unit to the detection position of the medium detection unit,
- the program comprising as steps executed by the control unit steps of:
- setting, before or when the scanning operation of the optical reading unit starts, a scannable range that can be scanned based on the distance from the scanning position of the optical reading unit to the detection position of the medium detection unit stored in the storage unit and detection of the conveyed medium by the medium detection unit;
- and scanning this scannable range.
Dependencies are inferred from the claim text.