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:
Apr. 05, 1994
Filed:
Jul. 29, 1991
Hitachi, Ltd., Tokyo, JP;
Hitachi, Engineering Co., Ltd., Ibaraki, JP;
Abstract
A graphic data processing apparatus for accessing memory which stores pixels where each of the pixels is a picture element of a unique point in two-dimensional space and having a number of pixels which may be selected in the memory and for generating graphic data with two or more bits per pixel being used and a plurality of pixels of data being stored in one word of the memory is disclosed. A physical address operation unit stores information of a current drawing point including a memory address of a word in the memory and a pixel address defining a position of a pixel in one word specified by the memory address. A data operation unit modifies a particular pixel in the one word specified by the pixel address in accordance with a drawing instruction with a number of pixels within a word being selectable.