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:
Oct. 03, 2006
Filed:
Oct. 18, 2002
Noboru Toyozawa, Kanagawa, JP;
Yoshiharu Nakajima, Kanagawa, JP;
Noboru Toyozawa, Kanagawa, JP;
Yoshiharu Nakajima, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
This invention realizes reduction in consumption of DC current in a level converter circuit by setting level shifters in an operating state only when necessary in accordance with hierarchical control, in which an output pulse of a level shifter () that is constantly in a power-ON state is used to set a level shifter () of the next hierarchical level in the operating state, then output pulses of the level shifter () and the level shifter () are used to generate control pulses LTand LTwhich are used to set level shifters (to) of the next hierarchical level in the operating state, and an output pulse of one of the level shifters is used to set level shifters (), () and () of the next hierarchical level in the operating state. Thus, a level converter circuit in which the consumption of DC current is reduced and which enables reduction in power consumption of the whole device, a display device equipped with this level converter circuit, and a portable telephone device using the display device as an output display unit can be constructed.