This light-emitting element drive control device (100) comprises: a drive logic unit (113) which performs a drive control of a switch output stage (N1, D1, L1) for dropping an input voltage (VIN) to an output voltage (VOUT) and supplying a light-emitting element therewith: a charge-pump power supply unit (α) which generates a step-up voltage (CP) higher than the input voltage (VIN); and a current detecting comparator (114) which receives a supply of the step-up voltage (CP) and the output voltage (VOUT) as power supply voltages, and generates control signals (SET, RST) for the drive logic unit (113) by directly comparing a current detection signal (Vsns) corresponding to an inductor current (IL) of the switch output stage with a peak detection value (Vsns_pk) and a bottom detection value (Vsns_bt).

An auxiliary lighting system for use with an auxiliary device assembled on a vehicle, where the vehicle has a vehicle lighting system that includes a vehicle headlight and a headlight control for switching between operational states of the vehicle headlight. The auxiliary lighting system includes a secondary auxiliary headlight, and a control circuit that causes the secondary auxiliary headlight to turn on depending on an operating mode of the auxiliary device. In a particular embodiment, the control circuit operates the secondary auxiliary headlight based the operating mode of the auxiliary device and an operating mode of the auxiliary lighting system.

A light signaling system for a vehicle having a vehicle lighting system and an auxiliary lighting system for use with an auxiliary device. The light signaling system includes a control module mounted to the vehicle. The control module is electrically coupled to one or more lights of the vehicle lighting system of the vehicle and to one or more lights of the auxiliary lighting system. The control module is configured to cause one or more lights, to which it is electrically coupled, to flash on and off.

The present disclosure provides a high-precision dimming circuit. A dimming circuit (107) includes an input stage (IN) and an output stage (OUT). The input stage (IN) includes a plurality of amplifiers (AMP1 to AMP3) which have non-inverted input terminals (+) thereof inputted with different dimming input voltages (DCDIM1, DCDIM2 and VH), respectively, and inverted input terminals (−) thereof inputted with a common dimming output voltage (V3). The output stage (OUT) is connected between respective output terminals of the plurality of amplifiers (AMP 1 to AMP3) and an output node of the diming output voltage (V3), and outputs, among the plurality of dimming input voltages (DCDIM1, DCDIM2 and VH) respectively inputted to the plurality of amplifiers (AMP1 to AMP3), a lowest voltage as the dimming output voltage (V3).

A circuit includes a primary light emitting diode (LED) string, a secondary LED string, a reference line, and primary and secondary transistors. The primary string includes a voltage drop, and a node disposed between two adjacent LEDs of the primary string. The secondary string is configured in parallel with the primary string. The secondary string has a voltage drop that is less than the primary voltage drop. The reference line is coupled to the node. The primary transistor includes a drain, a gate, and a source. The drain is coupled to a primary string output terminal. The gate is coupled to the reference line, and the source is coupled to a ground. The secondary transistor includes a drain, a gate, and a source. The drain is coupled to a secondary string output terminal. The gate is coupled to the reference line, and the source is coupled to the ground.

A vehicle is electrically connected to one or more accessories. The vehicle includes at least one controller that may be configured to identify the accessory based on accessory identification information. The controller may also be configured to provide one or more commands to control an operation of the accessory.

A LED controller includes a power distribution module and an interface to an external data bus. An image frame buffer is connected to the interface to receive image data. A separate logic module is connected to the interface and configured to modify image frame buffer output signals sent to an LED pixel array connected to the image frame buffer. The LED pixel array can project light according to a pattern and intensity defined at least in part by the image held in the image frame buffer.

A method for adapting a setpoint for a digital lighting unit, which is intended to be projected by a digital lighting unit of a motor vehicle, which includes a matrix light source and an optical system. The method includes a step of applying digital filtering to the digital setpoint. The filter used is capable of anticipating geometric aberrations induced by said optical system when projecting a digital setpoint.

A method for controlling a lighting device of a motor vehicle including at least one lighting module having a plurality of light sources, each of the light sources being designed to emit a luminous pixel, and a controller able to selectively control each of the light sources by applying thereto an electrical signal having a parameter of a value determined for the emission of a luminous pixel of given brightness.

Provided is a load drive device comprising: a first input terminal for accepting an input of a first input current from a power source; a second input terminal for accepting an input of a second input current from the power source via an external resistor; an output terminal for outputting an output current to a load; a current distribution unit for summing the first input current and second input current at a prescribed distribution ratio and generating the output current and a control unit for controlling the distribution ratio. As one example, it would be appropriate for the control unit to control the distribution ratio according to the difference between a first terminal voltage present in the second input terminal and a second terminal voltage present in the output terminal.