公开(公告)号：US20240399956A1

公开(公告)日：2024-12-05

申请号：US18665194

申请日：2024-05-15

Applicant: Nichia Corporation

Inventor： Yoshiyuki KAGEYAMA ,  Yoshiki YAMAJI ,  Hiroaki KURODA ,  Daisuke SANGA ,  Hisahiro SHINOHARA ,  Yuya KITAMOTO

IPC: B60Q11/00 ,  G01K11/00

Abstract: A method for estimating a temperature of a light emitting module having a plurality of light emitting elements is provided. The method includes based on a lighting pattern of the light emitting module, which represents an intensity of light emitted from each of the plurality of light emitting elements, determining an amount of electric power to be supplied to the light emitting module for obtaining the lighting pattern and based on the lighting pattern and the determined amount of electric power, calculating estimated temperatures of the plurality of light emitting elements that are operated in accordance with the lighting pattern.

公开(公告)号：US20240201012A1

公开(公告)日：2024-06-20

申请号：US18536168

申请日：2023-12-11

Applicant: NICHIA CORPORATION

Inventor： Yoshiki YAMAJI

IPC: G01J1/42 ,  G01J1/20 ,  H05B45/14

CPC classification number: G01J1/4257 ,  G01J1/20 ,  H05B45/14

Abstract: A characteristic value correction device includes a waveform acquiring unit, an area calculating unit, a time calculating unit, and a correction coefficient calculating unit. The waveform acquiring unit is configured to acquire a waveform indicating a relationship between an elapsed time and a first current value obtained when the pulse current is applied to a light-emitting device. The area calculating unit is configured to calculate a first area of an entire waveform and a second area of a rectangular wave portion. The time calculating unit is configured to calculate a first time between an application start time and an application end time of the pulse current and a second time corresponding to the second area. The correction coefficient calculating unit is configured to obtain a correction coefficient based on a ratio between the first area and the second area and a ratio between the first time and the second time.

公开(公告)号：US20230115310A1

公开(公告)日：2023-04-13

申请号：US17956300

申请日：2022-09-29

Applicant: NICHIA CORPORATION

Inventor： Daisuke SANGA ,  Yoshiki YAMAJI ,  Yoshiyuki KAGEYAMA ,  Hiroaki KURODA

IPC: G01J1/42 ,  G01K1/02 ,  B60Q11/00 ,  B60Q1/04

Abstract: A method for estimating a temperature of a light emitting module having a plurality of light emitting elements is provided. The method includes, based on a lighting pattern of the light emitting module, which represents an intensity of light emitted from each of the light emitting elements, estimating respective temperatures of at least a part of the light emitting elements that are operated in accordance with the lighting pattern.