An image sensor is proposed, which can output different amount of data according to different resolution modes. The image sensor employs a plurality of photo diodes to convert received optical signals into charges and uses a plurality of sets of transfer gates to move out the charges on the photo diodes....http://www.google.com/patents/US20030058361?utm_source=gb-gplus-sharePatent US20030058361 - Image sensor and scanner control method for using the same