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:
Jun. 24, 2003
Filed:
May. 31, 2000
Junichi Ushirono, Kagoshima, JP;
Sony Corporation, Tokyo, JP;
Abstract
Displaying an image at different aspect ratios requires incorporating circuits such as memory and scan converters into the drive system driving the display thus increasing the cost. In an active matrix liquid crystal display device a logic control circuit is added to the vertical drive circuit, and when a black display pulse BLK for switching the aspect ratio is applied, the pixels in a specified range at the top and bottom (or left and right) of the pixel section are set to active status and, a black level signal written for all pixels of the area set to active status and, pixels of all other areas are set by line to active status in sequence in the pixel section by vertical scanning performed by a vertical scanner and display signals are written for each line by horizontal scanning with a horizontal scanner, to allow displaying different aspect ratios with a simple design, low cost and low power consumption.