公开(公告)号：US10165648B2

公开(公告)日：2018-12-25

申请号：US15527017

申请日：2015-10-13

Applicant: OSRAM OLED GmbH ,  OSRAM GmbH

Inventor： Kilian Regau ,  Thomas Ungru ,  Karsten Diekmann

IPC: H05B33/08

Abstract: An optoelectronic circuit includes at least one first and second light emitting diodes; a switch arrangement connected between the first and second diodes and configured to switch over the first and second diodes between series and parallel circuits depending on a predefined ambient parameter; and a current matching circuit for matching the currents through the first and second diodes in case of parallel connection. The current matching circuit includes a current mirror circuit, including first and second current mirror transistors connected via its collector terminal to the first/second diodes, respectively. The arrangement includes a diode/a switch for connecting the first diode in series with the second diode and is configured to form the series circuit including the first and second diodes while bypassing the current matching circuit so that, in case of series connection, the first transistor is switched in a high-resistance fashion and the second transistor is short-circuited.

公开(公告)号：US20170284858A1

公开(公告)日：2017-10-05

申请号：US15477149

申请日：2017-04-03

Applicant: OSRAM GmbH

Inventor： Stefan Gschloessl ,  Karsten Diekmann ,  Steven Rossbach ,  Thorsten Vehoff ,  Nina Riegel ,  Norbert Haas

IPC: G01H1/12 ,  G01H9/00

CPC classification number: G01H1/12 ,  G01H9/00 ,  G01H11/08 ,  G01N29/2418 ,  G02F1/0131

Abstract: An acoustic sensor includes a layer sequence which can be caused to vibrate, and at least one detection element which is in mechanical contact with the layer sequence and is designed to convert vibrations into electrical signals. The layer sequence is a radiation-emitting layer sequence.