Biological information measurement device and non-transitory computer readable medium

    公开(公告)号:US11160473B2

    公开(公告)日:2021-11-02

    申请号:US16285247

    申请日:2019-02-26

    Abstract: A biological information measurement device includes a correction unit that receives a first signal expressing a change in an amount of light of a first wavelength detected from a living body and a second signal expressing a change in an amount of light of a second wavelength detected from the living body, and corrects at least one of the first signal and the second signal to reduce a difference between an amount of change in the first signal and an amount of change in the second signal associated with a change in an amount of arterial blood of the living body, and a computing unit that computes a change in a blood oxygen concentration in the living body on a basis of the first signal and the second signal of which at least one is corrected by the correction unit.

    Light emitting device, optical device, and measurement device

    公开(公告)号:US11495940B2

    公开(公告)日:2022-11-08

    申请号:US17110304

    申请日:2020-12-03

    Abstract: A light emitting device includes a wiring board having a first wiring layer and a second wiring layer adjacent to the first wiring layer via an insulating layer, and a laser having a cathode electrode and an anode electrode, mounted on the wiring board, and driven through low-side driving. The first wiring layer includes a cathode wire connected to the cathode electrode, an anode wire connected to the anode electrode, and a first reference potential wire connected to a reference potential. The second wiring layer includes a second reference potential wire connected to the reference potential. An area of an overlap between the second reference potential wire and the anode wire is larger than an area of an overlap between the second reference potential wire and the first reference potential wire.

    Light-emitting device, optical device, and measurement device

    公开(公告)号:US11936160B2

    公开(公告)日:2024-03-19

    申请号:US17109067

    申请日:2020-12-01

    CPC classification number: H01S5/0428 G01S7/4814 G01S17/894

    Abstract: A light-emitting device includes a laser unit; and a first capacitive element and a second capacitive element that supply a driving electric current to the laser unit; wherein the first capacitive element has a smaller capacity and smaller equivalent series inductance than the second capacitive element, and a length of a first electric current path along which the driving electric current output from the first capacitive element returns to the first capacitive element is shorter than a length of a second electric current path along which the driving electric current output from the second capacitive element returns to the second capacitive element.

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