Battery charger with calendar control
US5754029A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1997 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | Oct 16, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/772
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A battery charging apparatus anticipates usage and thus provides a charged battery available for use. In addition the charging regimen employed substantially eliminates memory effects in NICAD batteries. The battery charging apparatus comprises a power supply for generating a controllable battery charging current which is responsive to battery status. A plurality of calendars, stored in PROM, are user selectable to form a custom calendar. User specific event dates may be added to produce a composite calendar. A microprocessor maintains a real time clock calendar and executes a calendar algorithm. Upon the occurrence of a composite calendar event date, the microprocessor generates a control signal for initiating the battery charging current. The microprocessor also produces a status message display. Message data is stored in PROM and is used to generate a video signal for monitor display. The video signal is also coupled to an RF modulator for TV receiver display. Upon cessation of charging, due to completion or malfunction, battery identification and charging data are stored in memory to form a battery history.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.