| 摘要 |
An optical scanner with the scanning and transmission control circuit board removed out of the scanning casing and formed in an interface card connectable to an interface connector located on a computer motherboard. The interface card has an interface socket connectable with a cable which wires respectively to an optical scanning means and a transmission means of the scanner. Computer power supply provides power needed in the scanner through the cable. Scanning signals are transmitted through the cable between the scanning means and the interface card. The interface socket may be a high speed one (such as an IDE) without sharing with a printer on a low speed parallel port like a conventional scanner. Since the control circuit board is located outside the scanner, the scanner may be made thin and smaller size, thus saving packaging, warehousing and transportation costs. Without sharing a parallel port with a printer, the scanning and printing processes may be performed concurrently at high speed. Power supply is located in the computer metallic casing, electromagnetic interference is thus greatly reduced.
|
