公开(公告)号：US20210107397A1

公开(公告)日：2021-04-15

申请号：US16601230

申请日：2019-10-14

Applicant: Infineon Technologies AG

Inventor： Gernot Unterweger ,  Tobias Schuster ,  Andrea Scenini ,  Christof Michenthaler

IPC: B60Q1/14 ,  H05B33/08 ,  H04N9/69

Abstract: 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.

公开(公告)号：US20220330400A1

公开(公告)日：2022-10-13

申请号：US17228299

申请日：2021-04-12

Applicant: Infineon Technologies AG

Inventor： Gernot Unterweger ,  Mathias Sedner ,  Andrea Scenini ,  Hans-Peter Kreuter

IPC: H05B45/30 ,  B60Q3/80 ,  B60Q1/14 ,  H05B47/125

Abstract: 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.

公开(公告)号：US20220227286A1

公开(公告)日：2022-07-21

申请号：US17152519

申请日：2021-01-19

Applicant: Infineon Technologies AG

Inventor： Dietrich Bonart ,  Michael Weis ,  Gernot Unterweger ,  Salvatore Piccolella ,  Adolfo De Cicco

IPC: B60Q1/14 ,  H05B45/12 ,  H05B45/44

Abstract: 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.

公开(公告)号：US10945323B1

公开(公告)日：2021-03-09

申请号：US16837301

申请日：2020-04-01

Applicant: Infineon Technologies AG

Inventor： Adolfo De Cicco ,  Michael Weis ,  Gernot Unterweger ,  Rosario Chiodo ,  Dietrich Bonart

IPC: H05B45/50 ,  H05B45/37 ,  H05B45/3725 ,  G01R31/3183

Abstract: 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.

公开(公告)号：US10939528B2

公开(公告)日：2021-03-02

申请号：US16566768

申请日：2019-09-10

Applicant: Infineon Technologies AG

Inventor： Damiano Sartori ,  Fabrizio Cortigiani ,  Marco Pamato ,  Gernot Unterweger

IPC: H05B45/50 ,  H02H3/06 ,  H02H3/07 ,  H02H3/00

Abstract: An electronic circuit and a method are disclosed. The electronic circuit includes an LED circuit, wherein the LED circuit (1) includes: an input (11, 12) configured to receive an input voltage (VIN); a drive circuit (2A) connected to the input (11, 12); and an LED module (3A) connected to the drive circuit (2A) and comprising an LED string (41) with at least one LED. The drive circuit (2A) is configured to monitor the LED module (3A) for the occurrence of an LED short in the LED string (41) and to change from a normal mode to a defect mode upon detection of the LED short, and the drive circuit (2A) is configured, in the defect mode, to operate the LED string (41) in at least one defect cycle that includes deactivating the LED string (41) 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.