公开(公告)号：US20190132054A1

公开(公告)日：2019-05-02

申请号：US16168221

申请日：2018-10-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shigeru IDO ,  Keisuke SEKI ,  Kazuhiko HAYASHI

IPC: H04B10/516 ,  H04L7/00 ,  H04B10/80

Abstract: A modulation device includes: a signal input circuit that receives an external input signal and outputs the signal downstream as a first signal; and an arithmetic processor positioned downstream of the signal input circuit. The arithmetic processor is configured to: determine when an external ID signal including ID information has been input as the first signal, and when determining that an external ID signal including ID information has been input as the first signal, acquire the ID information from the external ID signal, obtain transmission timing synchronizing with the first signal based on the external ID signal, and output a light source drive signal that drives a light source according to the ID information based on the transmission timing synchronizing with the input signal.

公开(公告)号：US20180343057A1

公开(公告)日：2018-11-29

申请号：US15984368

申请日：2018-05-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Keisuke SEKI ,  Shigeru IDO ,  Kazuhiko HAYASHI

IPC: H04B10/116 ,  H05B33/08 ,  H05B37/02

CPC classification number: H04B10/116 ,  H02M1/14 ,  H02M1/4225 ,  H02M3/156 ,  H02M3/33507 ,  H02M2001/007 ,  H02M2001/008 ,  H04B10/502 ,  H05B33/0815 ,  H05B33/0824 ,  H05B33/0845 ,  H05B37/0272

Abstract: A lighting device includes: a constant current supply circuit; and a first modulation circuit and a second modulation circuit that are connected in series between output terminals of the constant current supply circuit. The first modulation circuit includes a first capacitor that is connected in parallel to the first modulation circuit. The second modulation circuit includes a second capacitor that is connected in parallel to the second modulation circuit.

公开(公告)号：US20180352627A1

公开(公告)日：2018-12-06

申请号：US15984389

申请日：2018-05-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Keisuke SEKI ,  Shigeru IDO ,  Kazuhiko HAYASHI

IPC: H05B33/08 ,  H05B37/02 ,  G09F13/22 ,  G09F13/02 ,  G09F13/00 ,  G06K7/14

Abstract: An illuminating apparatus includes a first light emitter, a second light emitter which emits light including more predefined color components than light emitted by the first light emitter, and a lighting device which supplies current modulated according to a visible light communication signal, to the first light emitter. The lighting device supplies a constant current to the second light emitter, while the first light emitter is supplied with current.

公开(公告)号：US20190268992A1

公开(公告)日：2019-08-29

申请号：US16411976

申请日：2019-05-14

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Keisuke SEKI ,  Shigeru IDO ,  Kazuhiko HAYASHI

IPC: H05B33/08 ,  G09F13/22 ,  G06K7/14 ,  G09F13/00 ,  G09F13/02

Abstract: An illuminating apparatus includes a first light emitter, a second light emitter which emits light including more predefined color components than light emitted by the first light emitter, and a lighting device which supplies current modulated according to a visible light communication signal, to the first light emitter. The lighting device supplies a constant current to the second light emitter, while the first light emitter is supplied with current.

公开(公告)号：US20180338364A1

公开(公告)日：2018-11-22

申请号：US15981553

申请日：2018-05-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shigeru IDO ,  Keisuke SEKI ,  Kazuhiko HAYASHI

IPC: H05B33/08 ,  G09F13/04

CPC classification number: H05B33/0887 ,  G09F13/04

Abstract: A lighting device is a device that is for supplying current to an LED unit, is connected to a constant current source having output terminals to which a capacitor is connected, and includes: a transistor connected in parallel with the capacitor and connected in series with the LED unit; a modulation circuit (a microcomputer of a modulator, etc.) that causes the transistor to switch ON and OFF based on a signal for visible light communication; and a constant current control circuit that maintains a current flowing through the transistor at a constant current when the current flowing through the transistor is greater than a first predetermined value.

公开(公告)号：US20180352625A1

公开(公告)日：2018-12-06

申请号：US15984385

申请日：2018-05-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Keisuke SEKI ,  Shigeru IDO ,  Kazuhiko HAYASHI

IPC: H05B33/08 ,  G09F13/00

Abstract: Provided is a control circuit (modulation circuit) that receives output current determined based on a dimming signal, from a lighting device, consumes, as consumption current, part of the output current, and supplies supply current to a light-emitting element. The control circuit includes a regulator circuit that regulates the consumption current. The regulator circuit monotonously increases a magnitude of the consumption current relative to a magnitude of the output current.