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:
May. 17, 1988
Filed:
Jan. 21, 1986
Shoji Iwasaki, Tottori, JP;
Sanyo Electric Co., Ltd, , JP;
Abstract
In a picture display device in accordance with the present invention, a selector (18) selects alternately the address output of a write address counter (15) and the address output of read address counters (16 and 17), and a selector (19) selects alternately the address output of a first read address counter (16) and the address output of a second address read counter (17). Then, picture element data based on a video signal from a picture processing circuit (1) is written in frame memories (4 and 5) corresponding to the two display areas (11) and (12) divided as the upper half and the lower half of the screen of a liquid crystal display (10) and after that, the picture element data is read out from the frame memory (4) and displayed on the upper display area (11) and written in the frame memory (5). Subsequently, the picture element data is read out from the frame memory (5) corresponding to the lower display area (12) so as to be displayed on the display area (12). Writing and reading of the frame memories (4 and 5), reading of the frame memory (4) and reading of the frame memory (5) are performed alternately. Then, writing and reading of the frame memory (5) and reading of the frame memory are performed alternately, whereby the picture element data is displayed with good quality on the liquid crystal display (10) by using the frame memories (4 and 5) corresponding to one frame.