公开(公告)号：JPH10150525A

公开(公告)日：1998-06-02

申请号：JP15119397

申请日：1997-06-09

Applicant: IBM

Inventor： ROBERT CARL BARRETT ,  ERHART THEODORE SCHRECK

IPC: H04N5/238 ,  G09F9/37 ,  H04N1/04 ,  H04N1/195

Abstract: PROBLEM TO BE SOLVED: To make adjacent pixels of optical shutter non-transparent, except for a selected transparent cluster and to scan the contents of document, while moving this cluster of pixels on a screen according to a prescribed pattern by projecting an image through the optical shutter onto a photosensor. SOLUTION: When a light source 102 projects light on an optical shutter 104, the shutter 104 prepares a scanning cursor to perform scanning according to a prescribed scanning pattern. Whether the image to be scanned is to arrange an object between a sensor 106 and the shutter 104 or between the shutter 104 and the light source 102 is guided by preparing the image, while using the light source 102. The image which passed through the optical shutter 104 is detected by the photosensor 106, and the activated pixels of the optical shutter 104 are colored in black or non-transparent to the light source 102 but the non-activated pixels are made transparent. The light from the light source 102 is shielded by ink on a document.