A lamp control device comprises a first input terminal, a second input terminal, an output terminal that is configured to be connectable to a lamp via an external switch and outputs a drive current for the lamp, an internal switch provided on a first path connecting the first input terminal and the…
The invention relates to a short-circuit fault detection illumination device () for a motor vehicle headlight, comprising
An information notification device includes a central processing unit. The central processing unit is configured to acquire information on the state of deterioration of a vehicle lamp of a vehicle, and is configured to propose replacement or maintenance of a lens of the vehicle lamp and also…
This invention provides a method for detecting a failure in a solid-state light source of an automotive lighting device. This method provides an estimated temperature profile for the lighting device, measures an actual temperature profile of the lighting device and compares the estimated…
To provide a vehicular lamp system capable of reducing a replacement frequency of a vehicular lamp. A vehicular lamp system includes a vehicular lamp having a plurality of elements capable of emitting light to a corresponding irradiation region and a detection unit that detects presence or absence…
The invention relates to a monitoring protection circuit for lighting systems, which comprises a lighting unit, a power supply, and a measuring device measuring electrical quantities, as well as a method which uses the monitoring protection circuit. The object of providing a monitoring protection…
The method involves generating a diagnostic signal (Idiag) in form of a diagnostic flow, which corresponds to a sum of diagnostic current from individual streams. The lamps (02-06) of light (01) are provided with failure detection unit (11) for light sources (10) of each lamp. The sum of any…
The system (SE) has an optical imaging system (17) receiving white light (B) re-emitted by a wavelength conversion device (15), and projecting the light in front of a vehicle to form a light beam. The wavelength conversion device is located in vicinity of a focal plan of the imaging system. A…
A lighting control device for a vehicle according to the embodiment includes a display unit (8) ; a control device reception unit which receives non-lighted state information of a light source of a lighting system; and a control device control circuit (2) which changes a display state of the…
An apparatus for detecting abnormality in an LED (light-emitting diode) vehicle lamp (100) includes a detecting module (3) and a warning module (4). The LED vehicle lamp (100) includes a plurality of LEDs (101). The detecting module (3) is to be electrically coupled to the LED vehicle lamp (100)…
The vehicle energy retrieving device includes an input current detection circuit (41), a boost converter circuit (42), an output voltage detection circuit (43), a power source (1) and a load end (3). The input current detection circuit (41) controls input current and the boost converter circuit…
An automobile LED driving device includes a current setting portion to set multiple reference currents independently from one another for multiple respective current setting resistors connected externally, a current controller to select one of the multiply reference currents based on a control…
The arrangement has a semiconductor switching device (10) i.e. MOSFET transistor, with a load current output (12) for supplying load current (Il) to loads (V1, V2). A diagnosing current output (13) outputs diagnosing currents (Id-Id3) that are proportional to current flowing at the load current…
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 equipments are deduced. The states of the electric…
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 is carried out when the consumer is visibly…
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 of the light source, where the arrangement…
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 (107, 110, 112, 106, 109, 105, 108) being…
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 through the LED branches is detected as the…
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 exceed a preset limit. The transistor (2) is…
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 to operate a switch (Q2) for connecting a…
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 driven so that if a LED fails all LEDs in…