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. 06, 2004
Filed:
Jan. 18, 2001
Keiichi Hayashi, Kanagawa, JP;
NEC Corporation, Tokyo, JP;
Abstract
A keyboard device incorporating a power supply checks whether or not the power supply is turned on. If it is, the device determines whether or not the device is connected to a cellular phone. If the connection is determined, the keyboard device is set to an active state and a light emitting diode (LED) in an LED portion is turned on to indicate the active state. If the keyboard device is not connected to the cellular phone, the device is set to a standby state. In this state, the keyboard device is in a mode where a connection state with respect to a cellular phone is monitored, without turning on the LED. The power dissipated in the power supply of the keyboard device is minimized, thus the device is capable of operating for a long period of time.