Method for operating a high-resolution projection headlight, and projection headlight for a motor vehicle
US12043165B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 2022 |
| Grant date | Jul 23, 2024 |
| Priority date | — |
| Expiry date | Jan 25, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method for operating a high-resolution projection headlight for a motor vehicle. The high-resolution projection headlight has an active LED pixel matrix light source which comprises an LED matrix monolithically integrated into a semiconductor chip with a plurality of light diode-based pixels and a driver circuit for separately controlling each individual pixel within the LED matrix. A current digital image of a sequence of images is continuously rasterized by means of a graphical controller from graphical data with at least one graphical object (50) and is provided for image reproduction with the projection headlight. A value for a thermal loading of the LED pixel matrix light source is continuously determined. During the rasterizing of a current digital image, surface areas (52) of the graphical objects (50) to be projected are at least partially masked with a masking (60, 61) and modulated, provided that the value for thermal loading exceeds a limit value. The invention also relates to a corresponding projection headlight system for a motor vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.