公开(公告)号：US10284994B2

公开(公告)日：2019-05-07

申请号：US15468711

申请日：2017-03-24

Applicant: STMicroelectronics (Research & Development) Limited

Inventor： Alexios Alexandropoulos

IPC: H04R3/00 ,  H04S7/00 ,  H04S3/00 ,  G01S17/36 ,  G01S17/66 ,  H04R3/12 ,  H04R29/00 ,  G01S17/48 ,  G01S17/89

Abstract: A directional loudspeaker system has a loudspeaker arrangement configured to generate N audio signals. A time-of-flight sensor arrangement is configured to detect a location of a user. A controller is configured to use information from the time-of-flight sensor arrangement about the location of the user to control the delay such that the N audio signals constructively interfere at the location of the user.

公开(公告)号：US11196229B2

公开(公告)日：2021-12-07

申请号：US16440619

申请日：2019-06-13

Applicant: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED

Inventor： Denise Lee ,  Graeme Storm ,  Aravind Venugopalan Nair Jalajakumari ,  Alexios Alexandropoulos

IPC: H01S5/042 ,  H02M3/07 ,  H01S5/068 ,  G01S7/481 ,  G01S17/06

Abstract: A driver circuit for a laser diode is configured to pass a current. The circuit includes a charge-pump configured to generate an output boosted positive supply rail voltage. At least one switch is configured to couple the output of the charge-pump to a terminal of the laser diode and to isolate the positive supply rail from the terminal of the laser diode when the charge-pump is enabled.

公开(公告)号：US20210126708A1

公开(公告)日：2021-04-29

申请号：US16730036

申请日：2019-12-30

Applicant: STMicroelectronics (Research & Development) Limited

Inventor： Ellen Couper ,  Neale Dutton ,  Alexios Alexandropoulos

IPC: H04B10/116 ,  H04B10/70 ,  H04B10/50 ,  H04B10/66

Abstract: A method of processing a visible light communication (VLC) signal using a single-photon avalanche diode (SPAD) includes detecting photons of a VLC signal at a SPAD detector, counting the photons detected by the SPAD detector to generate a combined VLC signal comprising a data signal and an ambient signal, extracting the ambient signal from the combined VLC signal, subtracting the ambient signal from the combined VLC signal to generate the data signal, and outputting the data signal as a bitstream.

公开(公告)号：US10992384B1

公开(公告)日：2021-04-27

申请号：US16730036

申请日：2019-12-30

Applicant: STMicroelectronics (Research & Development) Limited

Inventor： Ellen Couper ,  Neale Dutton ,  Alexios Alexandropoulos

IPC: H04B10/00 ,  H04B10/116 ,  H04B10/66 ,  H04B10/50 ,  H04B10/70

Abstract: A method of processing a visible light communication (VLC) signal using a single-photon avalanche diode (SPAD) includes detecting photons of a VLC signal at a SPAD detector, counting the photons detected by the SPAD detector to generate a combined VLC signal comprising a data signal and an ambient signal, extracting the ambient signal from the combined VLC signal, subtracting the ambient signal from the combined VLC signal to generate the data signal, and outputting the data signal as a bitstream.

公开(公告)号：US20190393674A1

公开(公告)日：2019-12-26

申请号：US16440619

申请日：2019-06-13

Applicant: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED

Inventor： Denise Lee ,  Graeme Storm ,  Aravind Venugopalan Nair Jalajakumari ,  Alexios Alexandropoulos

IPC: H01S5/042 ,  H02M3/07

Abstract: A driver circuit for a laser diode is configured to pass a current. The circuit includes a charge-pump configured to generate an output boosted positive supply rail voltage. At least one switch is configured to couple the output of the charge-pump to a terminal of the laser diode and to isolate the positive supply rail from the terminal of the laser diode when the charge-pump is enabled.