Double-side image scanner and scanning method of the same

A double-side image scanner module, comprising:

• a paper feeder comprising:
• a first paper-transmission channel capable of receiving a document with a first side thereof facing downwardly,
• a second paper-transmission channel capable of receiving the document with a second side thereof facing downwardly, and
• a paper-turning region connected between the first and second paper-transmission channels to transmit the document from the first paper-transmission channel to the second paper-transmission channel;
• an image extraction apparatus capable of extracting images of the first and second sides of the document;
• and
• a light transparent channel extending between the first or the second paper-transmission channel and the image extraction apparatus;
• wherein the image extraction apparatus is capable of being driven to adjust a distance between the image extraction apparatus and the first and second paper-transmission channels when the first or second sides of the document are to be scanned through the light transparent channel.

A scanning method, comprising:

• feeding a document into a paper-feeding through-channel of a double-side image scanner module with a first side of the document facing an image extraction apparatus while passing over a light transparent channel;
• scanning an image of the first side by the image extraction apparatus through the light transparent channel;
• transmitting the document along the paper-feeding through-channel until a second side of the document is facing the image extraction apparatus while passing over the light transparent channel at a different height;
• and
• scanning an image of the second side by the image extraction apparatus through the light transparent channel.

A scanning method comprising:

• feeding a document into a first paper-transmission region with a first side of the document facing an image extraction apparatus;
• adjusting a light source emitting light incident onto the first side when the first side is to be scanned, so as to obtain an image thereof;
• transmitting the document through a paper-turning region and turning the document with a second side of the document facing the image extraction apparatus;
• and
• adjusting the light source emitting light incident onto the second side when the second side is to be scanned, so as to obtain an image of the second side.

A scanning method comprising:

• feeding a document into a first paper-transmission region with a first side of the document facing an image extraction apparatus;
• adjusting a distance between the image extraction apparatus and the first side when the first side is to be scanned, so as to obtain an image thereof;
• transmitting the document through a paper-turning region and turning the document with a second side of the document facing the image extraction apparatus;
• and
• adjusting a distance between the image extraction apparatus and the second side when the second side is to be scanned, so as to obtain an image of the second side.