Invention Grant
- Patent Title: Circuit with switch-off device for the operation of light sources
- Patent Title (中): 具有关闭装置的电路用于操作光源
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Application No.: US11151352Application Date: 2005-06-14
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Publication No.: US07443106B2Publication Date: 2008-10-28
- Inventor: Marco Faccin , Felix Franck , Michele Menegazzi
- Applicant: Marco Faccin , Felix Franck , Michele Menegazzi
- Applicant Address: DE München
- Assignee: Patent-Treuhand-Gesellschaft für Elektrische Glühlampen mbH
- Current Assignee: Patent-Treuhand-Gesellschaft für Elektrische Glühlampen mbH
- Current Assignee Address: DE München
- Agent Carlo S. Bessone
- Priority: DE102004028798 20040615
- Main IPC: H05B37/02
- IPC: H05B37/02 ; H01J1/04 ; H02M3/24 ; H01H9/00

Abstract:
Circuit with a switch-off device for the operation of light sources The invention relates to a circuit with a switch-off device for the operation of light sources (Lp), have the following features: a self-commutated half-bridge inverter having a series circuit of an upper electronic switch and a lower electronic switch (T1, T2), which are joined at a half-bridge midpoint (M) and are connected between a supply voltage (+) and a ground potential, a start capacitor (C3) which is joined via a trigger element (DIAC) to a control electrode of the lower electronic switch (T2), and a switch-off device having an input (E) and an output, which are configured and connected so that they discharge the start capacitor (C3) if a switch-off signal is applied to the input (E). The switch-off device contains a time delay. In order to be able to keep the components in the time delay small, it is proposed that the switch-off device should comprise two successively connected transistor stages (T3, T4) with bipolar transistors, a first stage (T3) being configured as a collector circuit and a second stage (T4) being configured as an emitter circuit. The second stage (T4) may perferable be used to suppress start pulses.
Public/Granted literature
- US20050275356A1 Circuit with switch-off device for the operation of light sources Public/Granted day:2005-12-15
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