Browse Prior Art Database

Charge and Discharge Function in a Notebook PC

IP.com Disclosure Number: IPCOM000107821D
Original Publication Date: 1992-Mar-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 4 page(s) / 105K

Publishing Venue

IBM

Related People

Narita, I: AUTHOR [+3]

Abstract

Disclosed is a charge and discharge function in a notebook PC. The user can select power save mode, charge mode, discharge mode, or discharge and charge mode by software, and the user can discharge and charge the battery without paying attention to that.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Charge and Discharge Function in a Notebook PC

       Disclosed is a charge and discharge function in a
notebook PC.  The user can select power save mode, charge mode,
discharge mode, or discharge and charge mode by software, and the
user can discharge and charge the battery without paying attention to
that.

      This invention is composed of the following:
- User interface
- Control MPU
- Main body (i.e., Notebook PC) with power management function
- Power supply

      The user interface is where the user inputs commands such as
charge, charge and discharge, etc.  As shown in Fig. 1, in this
invention, this interface is offered by menu on the display for the
user to select.

      As shown in Fig. 2, the control MPU does the power management
(including disable of power saving), the monitoring of the status,
and the control of the power supply.

      Normally, the main body has several functions to save power.
When the user operates with the system, the system is controlled so
that the battery life is lengthened.  But as shown in Fig. 3, in the
discharge mode (for cancellation of memory effect), the power-saving
function is disabled so that the battery discharge time is shortened.

      The power supply is composed of the battery, the external power
supply such as the AC/DC adapter, the charger, switches such as
transistors.  As shown in Fig. 4, the power supply transmits the
status to the control MPU and is controlled by the MPU.

      From the combination of Fi...