US 12,407,798 B2
Method of operating at least two laser devices and display device
Sebastian Schlegl, Abbach (DE); and Joerg Erich Sorg, Regensburg (DE)
Assigned to AMS-OSRAM INTERNATIONAL GMBH, Regensburg (DE)
Appl. No. 18/570,112
Filed by ams-OSRAM International GmbH, Regensburg (DE)
PCT Filed Jun. 15, 2022, PCT No. PCT/EP2022/066438
§ 371(c)(1), (2) Date Dec. 14, 2023,
PCT Pub. No. WO2022/263582, PCT Pub. Date Dec. 22, 2022.
Claims priority of application No. 10 2021 115 811.7 (DE), filed on Jun. 18, 2021.
Prior Publication US 2024/0283898 A1, Aug. 22, 2024
Int. Cl. H04N 9/31 (2006.01)
CPC H04N 9/3161 (2013.01) [H04N 9/3135 (2013.01); H04N 9/3164 (2013.01); H04N 9/3182 (2013.01); H04N 9/3194 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for operating at least two laser devices in which the at least two laser devices generate a sequence of light points, in particular of different brightness, comprising:
generating a first one of the sequence of light spots during a first period of time by a first one of the at least two laser devices;
detecting a voltage drop across the first of the at least two laser devices within the first time period; wherein the detecting is performed during a time period in which the first of the at least two laser devices is switched to a reverse direction;
determining a target brightness for a second of the sequence of light spots for at least one of the at least two laser devices;
determining at least one of a supply current and a switch-on time during a second time period for generating the target brightness for the at least one of the at least two laser devices, taking into account the voltage drop detected within the first time period; and
controlling the at least one of the at least two laser devices during the second time period with the determined supply current and/or the switch-on time,
wherein the at least two laser devices comprise laser diodes.