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. 01, 2013
Filed:
Sep. 27, 2007
Eiji Muramatsu, Tokyo, JP;
Eiji Muramatsu, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
When there is a circuit that has to wait for one frame cycle to switch LCD resolution, a user feels uncomfortable because the resolution is switched while the screen is temporarily turned off and blackened or while the screen does keep display but causes flickers. When the user switches to an application that will display in QVGA mode on the LCD while the LCD is displaying in VGA mode, a synchronization signal, etc. are stopped from being output from an LCD controller within a vertical blank period (step S). Then, a pseudo vertical synchronization signal whose cycle falls within the vertical blank period is generated by the LCD controller to trigger a circuit in a par/ser converting circuit triggered by a vertical synchronization signal (steps Sto S), and to realize resolution switching (steps Sto S). This prevents blackening/flickering of the screen when the resolution is switched.