Invention Grant
- Patent Title: Discharge state indicator
- Patent Title (中): 放电状态指示灯
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Application No.: US12159260Application Date: 2006-12-09
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Publication No.: US08148947B2Publication Date: 2012-04-03
- Inventor: Torsten Klemm , Gerrit Rönneberg
- Applicant: Torsten Klemm , Gerrit Rönneberg
- Applicant Address: DE Kronberg
- Assignee: Braun GmbH
- Current Assignee: Braun GmbH
- Current Assignee Address: DE Kronberg
- Agent David K Mattheis; Kim W Zerby
- Priority: DE102005063045 20051229
- International Application: PCT/EP2006/011882 WO 20061209
- International Announcement: WO2007/079868 WO 20070719
- Main IPC: H02J7/00
- IPC: H02J7/00

Abstract:
A circuit for displaying the state of a battery that is almost discharged features a battery, an inductive load, and a controllable switch connected in series. The circuit also includes a display element connected in series with the inductive load and the battery. The controllable switch is opened when a voltage of the battery is lower than a first threshold level and is only closed again when the voltage of the battery is greater than a second threshold level. The circuit may also include a control circuit having a comparator which compares the voltage of the battery with the first threshold level and the second threshold level and triggers the controllable switch accordingly.
Public/Granted literature
- US20080315841A1 Discharge State Indicator Public/Granted day:2008-12-25
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