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:
Nov. 20, 1990
Filed:
Feb. 05, 1990
Sakae Horyu, Hachiohji, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image processing apparatus for reading an image pattern such as characters, graphics or the like written on a printed matter comprises: a lamp for illuminating such an image pattern; a photo-sensor as an image reading unit for converting the light reflected from the pattern to an electrical signal as multi-value digital data; a converter for converting the output data from the photo-sensor to a binary digital value on the basis of the maximum value and the minimum value of this data; and a control unit for controlling the photo-sensor so as to stabilize the binary output data from the converter on the basis of this output data. With this apparatus, the image pattern is converted to the mechanical vibrational pattern or enlarged display pattern due to the piezoelectric elements or LEDs, thereby enabling a blind person or person with poor vision to easily and certainly perceive the characters or graphic information on the printed matter.