Original reader
AssigneeCanon Kabushiki Kaisha
InventorKimiyoshi Hayashi
Life of this patent
Estimating the term…
Abstract
There is disclosed an original reader capable of reading original image with a high fidelity. The original reader has a plurality of line sensors each having a plurality of photosensor elements, said line sensors being so arranged that the read lines of adjacent line sensors differ. Said plurality of line sensors and an original are relatively moved in scanning direction and vertical direction of said plurality of line sensors. An analog output of the line sensor which scans the original before others of said plurality of line sensors is delayed by a predetermined time.
Claims17
An original reader comprising:
- a plurality of line sensor chips provided on a substrate and each having a plurality of photosensor elements, said line sensor chips being arranged such that lines read by adjacent line sensor chips mutually differ, said chips being arranged to read an original image on a division basis and image reading areas of the adjacent line sensor chips being partially overlapped;
- means for causing relative movement of said plurality of line sensor chips and an original, for reading the original image, in a direction perpendicular to a scanning direction of said plurality of line sensor chips;
- delay means for delaying an analog output of the line sensor chip which scans the original before others of said plurality of line sensor chips by a predetermined time;
- and
- means for eliminating, from outputs of said plurality of line sensor chips, outputs corresponding to said overlapped image reading areas.
An image reading device comprising:
- a substrate;
- a plurality of line sensor chips provided on said substrate and each having a plurality of photosensor elements, said line sensor chips being arranged in a zigzag fashion on first and second lines which are spaced with a predetermined interval, and being arranged to read an image on a division basis;
- a plurality of parallel registers provided on said substrate each for shifting in parallel analog signals outputted in parallel from each of the photosensor elements of the line sensor chips associated with at least one of the first and second lines, in synchronism with an externally provided shift signal;
- and
- a plurality of serial registers provided on said substrate each for serially outputting the analog signals outputted in parallel from each of said parallel registers or each of said photosensor elements of said line sensor chips.
An original reader comprising:
- reading means having a plurality of 2n+1 (where n is an integer) line sensors for reading an original image on a division basis, respective image reading areas of adjacent line sensors being partially overlapped, wherein n said line sensors are arranged on a first line which read an original in advance, and n+1 said line sensors are arranged on a second line which read the original following said first line;
- means for causing relative movement of said plurality of line sensors and an original, for reading the original image, in a direction perpendicular to a scanning direction of said plurality of line sensors;
- delay means for outputting analog signals from n line sensors of the first line delayed by a predetermined time;
- and
- means for eliminating, from outputs of said plurality of line sensors, the outputs corresponding to said overlapped image reading areas.
Dependencies are inferred from the claim text.