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:
Jan. 13, 1998
Filed:
May. 29, 1992
Hitachi, Ltd., Tokyo, JP;
Abstract
A character generating system drives a printer engine to print characters in response to an instruction from a host computer. The characters to be printed by the printer information are normally generated on the basis of dot data stored in a cache memory via a print map memory under the control of e.g. a microprocessor. Since the cache memory is a volatile memory, its contents may be erased due to disconnetion of the power supply. In order to speed up the regeneration of the dot data in the cache memory, information relating to the dot data is stored in a non-volatile memory, and on reconnection of the power supply, that information is used together with vector information in a vector memory for regeneration of the dot data in the cache memory.