Infineon Technologies Ag

Gernot Unterweger

Adolfo De Cicco

Andrea Scenini

Dietrich Bonart

Marco Pamato

Damiano Sartori

Michael Weis

Fabrizio Cortigiani

Christof Michenthaler

Hans-Peter Kreuter

Rosario Chiodo

Fausto Borghetti

Ramdas Ugale

Mathias Sedner

Salvatore Piccolella

Pietro Vallese

Tobias Schuster

Francesco Vaiti

A system includes a light-emitting diode (LED) circuit comprising a set of LEDs arranged in a formation, wherein the set of LEDs comprise a set of LED clusters; and a controller. The controller is configured to: control, according to a first LED control mode, whether each LED of the set of LEDs is turned on or turned off; and control, according to a second LED control mode, whether each LED cluster of the set of LED clusters is turned on or turned off, wherein the first LED control mode requires the controller to use a first amount of computing resources, wherein the second LED control mode requires the controller to use a second amount of computing resources, and wherein the second amount of computing resources is lower than the first amount of computing resources.

System for individually controlling light-emitting diodes (LEDs) and controlling clusters of LEDs as units

A control circuit may be configured to control light emitting diode (LED) driver circuits. The control circuit may be configured to generate a multicast of pixel intensity values based on data in memory or data received from a data source, and output the multicast on an interface, which may comprise a one-wire uni-directional interface. In some examples, a plurality of drivers may receive the multicast, and each of the plurality of drivers may drive different sets of LEDs based on the multicast.

Interfaces and techniques for cost effective control of light emitting diodes in a vehicle

A method of controlling a vehicle headlamp that includes a plurality of LEDs may comprise receiving video images at a first frame rate; storing the video images in a memory at the first frame rate; receiving offset data associated with the video images; defining sub-images based on the offset data and the video images; and driving the plurality of LEDs to present the sub-images at a second frame rate, wherein the second frame rate is faster than the first frame rate.

Image stabilization and image presentation techniques for pixelated vehicle headlamps

A vehicle headlamp control circuit is configured to control a vehicle headlamp comprising a plurality of lighting elements. The vehicle headlamp control circuit may comprise a memory that stores information for controlling the plurality of lighting elements, and a driver circuit that drives the plurality of lighting elements based on the information, wherein the information compensates for one or more failed elements of the plurality of lighting elements.

Compensating for failed pixels in pixelated vehicle headlamps

A vehicle headlamp control circuit may be configured to control a vehicle headlamp comprising a plurality of lighting elements. The vehicle headlamp control circuit may comprise a first communication interface configured to receive a first signal comprising a first set of values for driving the plurality of lighting elements, and a second communication interface configured to receive a second signal comprising an intensity threshold. The circuit may be configured to determine a composite intensity associated with the first set of values and drive the plurality of lighting elements using the first set of values if the composite intensity associated with the first set of values satisfies the intensity threshold.

Light function control redundancy when changing the light intensity of pixelated vehicle headlamps

A circuit may be configured to control a vehicle headlamp comprising light emitting diodes (LEDs). The circuit may comprise an LED controller configured to receive video data from a video source via a first interface; an LED driver configured to drive the LEDs based at least in part on the video data; and a second interface between the LED controller and the LED driver, wherein the second interface is configured to communicate the video data from the LED controller to the LED driver and wherein the second interface communicates the video data at a slower data rate than the first interface.

Interfaces for cost effective video communication within advanced vehicle headlamp circuits

A method and an electronic circuit are disclosed. The method includes detecting at least one operating parameter in an electronic circuit that includes a monitored LED string; adjusting a voltage threshold based on the at least one detected operating parameter; detecting a string voltage across the monitored LED string; comparing the string voltage with the voltage threshold; and detecting a defect in the LED string based on the comparing.

Method for detecting a defect in an LED string and electronic circuit with at least one LED string

This disclosure includes systems, methods, and techniques for controlling a plurality of light-emitting diodes (LEDs). For example, a circuit includes a switching device, where the switching device is electrically connected to an LED of the plurality of LEDs, and where the switching device is configured to control whether the LED receives an electrical signal from a power source. Additionally, the circuit includes processing circuitry configured to determine that the LED is associated with a bright failure condition by attempting to prevent the LED from receiving the electrical signal from the power source using the switching device and disable the LED in response to detecting the bright failure condition.

Detecting LED failure conditions

An electronic circuit and a method are disclosed. The electronic circuit includes an LED circuit, wherein the LED circuit () includes: an input () configured to receive an input voltage (V); a drive circuit (A) connected to the input (); and an LED module (A) connected to the drive circuit (A) and comprising an LED string () with at least one LED. The drive circuit (A) is configured to monitor the LED module (A) for the occurrence of an LED short in the LED string () and to change from a normal mode to a defect mode upon detection of the LED short, and the drive circuit (A) is configured, in the defect mode, to operate the LED string () in at least one defect cycle that includes deactivating the LED string () for a deactivation period, activating the LED string for an activation period, and checking for the persistence of the LED short in the activation period.

Electronic circuit with an LED module

This disclosure includes systems, methods, and techniques for controlling delivery of power to one or more strings of light-emitting diodes (LEDs). For example, a circuit includes a power converter unit configured to receive an input signal from a power source and generate a first output signal comprising a first voltage, a charge pump configured to receive at least a portion of the first output signal from the power converter unit and generate a second output signal comprising a second voltage, and a linear regulator configured to receive the second output signal from the charge pump and generate a third output signal comprising a third voltage.

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Latschach, Austria

Gernot Unterweger