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:
Dec. 29, 1992
Filed:
Oct. 10, 1990
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A method of diagnosing the operating conditions of an image processor comprising the steps of preparing a first pattern of data, a second pattern corresponding to the first pattern when it has been compressed normally, a third pattern of data, and a fourth pattern corresponding to the third pattern when it has been expanded normally; diagnosing an operating condition of the compressor by comparing data after the first pattern has been compressed by the compressor with the second pattern; and diagnosing an operating condition of the expander by comparing data obtained after the third pattern has been expanded by the expander with the fourth pattern. The independent diagnosis of the compressor and the expander allows the specific defective chip of component to be identified, thereby facilitating proper repair.