About 18 results
https://drivepatents.com/patents/1010332 · 10 Aug 2011
The method involves measuring amplitude of magnetic field in two directions, and analyzing measured amplitude of magnetic field for insulating respective contributions of different electric equipments on the magnetic field. States of the electric equipment...
https://drivepatents.com/patents/1010759 · 27 Jul 2011
The arrangement (01) has an electric consumer (02) switchably arranged between electric potentials (UB, GND), where the electric consumer is switchably connected to two potentials. A switch (03) comprises a current monitoring circuit, and fault detection i...
https://drivepatents.com/patents/1011416 · 29 Jun 2011
The module (5) has multiple semiconductor light sources in serial connection with each other. A circuit arrangement is assigned to and connected in parallel with the light sources. The arrangement includes multiple detectors for detection of a malfunction ...
https://drivepatents.com/patents/1012428 · 1 Jun 2011
To provide a warning lamp device for vehicles which makes it easy to recognize a power supply failure of a warning lamp (107, 110, 112, 106, 109, 105, 108) that is positioned in a location different from a meter with the power supply of the warning lamp (1...
https://drivepatents.com/patents/1014938 · 16 Mar 2011
The method involves comparing a state variable of LED branches (Z1, Z2) with a comparison value during switching on the LED branches. A failure detection signal (I-A) is generated depending on the comparison results. Branch current (I-Z1, I-Z2) flowing thr...
https://drivepatents.com/patents/1076672 · 22 Jun 2005
The device has circuits (B0-Bn) with transistors (2, 15), fuses (5) and Zener diodes (9) that are responsive to voltages at terminals of LEDs. The circuits are in short-circuit in a non-reversible manner when the voltages at the terminals of the LEDs excee...
https://drivepatents.com/patents/1083978 · 15 Sep 2004
A failure warning device for an LED comprises a first resistor (R1) connected in series with the LED, a second resistor (R3, R4) connected in parallel with the LED, and control means (IC) responsive the voltage across the second resistor (R3, R4) arranged ...
https://drivepatents.com/patents/1109190 · 17 Oct 2001
The device applies a supply voltage to at least two parallel connected rows of light emitting diodes or LEDs (LED) depending on the LEDs and the required lighting. A transistor (Ta,Tb,Tc) is connected in series with each row of LEDs. The transistors are dr...