The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 1988
Filed:
Feb. 04, 1987
Masaharu Tsukada, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
There is provided an image display apparatus which imputs image information and displays it on a large display surface. This apparatus comprises: a photo sensitive material belt; rollers to support and drive the belt and a motor to rotate the drive roller; an image exposing apparatus of the laser beam scanning method; a toner developer; a pulse generator for continuously generating pulses in association with the rotation of the drive roller; a counter to count the pulses; and a controller to control the stop timing of the drive roller in order to stop the movement of the belt in accordance with the count value of the counter. The movement of the belt is controlled at the accurate timing synchronized with the pulses from the pulse generator. Thus, it is prevented that a joint of the belt appears in the display section, and the image information is displayed at the proper location in the display surface. Also, since the image exposure is performed by the extremely thin laser beam, the image information such as small and thin characters, graphics, etc. can be clearly displayed, so that the image with good visibility is derived. A coordinate pattern can be also added onto the display image for easy editing.