Vehicular turn signal indicator system and flasher circuit for the same
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United States of America Patent
Stats
-
Aug 9, 2005
Grant Date -
May 20, 2004
app pub date -
Nov 13, 2003
filing date -
Nov 15, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A flasher circuit included in a vehicular turn signal indicator system has a flashing control circuit, a flashing relay, a current detecting resistor, and a switching circuit. The control circuit detects a voltage drop across the resistor during driving of light bulb indicator lamps and light emitting diode (LED) indicator lamps of the system. Each LED lamp is configured to output a disconnection signal if at least one of their LEDs is disconnected during the driving. The signal turns on a transistor of a switching circuit, resulting in short across the resistor. As a result, the voltage drop is lowered equal to or under the threshold value, and the control circuit starts the disconnection detection.
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Family
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Cited Art Landscape
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