公开(公告)号：US20210270428A1

公开(公告)日：2021-09-02

申请号：US17273604

申请日：2019-07-05

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Yuki UEDA ,  Masayuki HOGIRI ,  Yoshihisa NAGASAKI ,  Kojiro OKUYAMA

IPC: F21K9/64 ,  F21S41/125

Abstract: Provided is a wavelength conversion member capable of improving brightness of a light source device. Wavelength conversion member according to the present disclosure includes: first phosphor layer that is disposed on an incidence side where excitation light enters, and contains a plurality of first phosphor particles; and second phosphor layer that is disposed on a side reverse to the incidence side and contains a plurality of second phosphor particles. First phosphor particles include an activation component, second phosphor particles include an activation component same as or different from the activation component included in first phosphor particles, and a concentration of the activation component in first phosphor layer is lower than a concentration of the activation component in second phosphor layer.

公开(公告)号：US20210123577A1

公开(公告)日：2021-04-29

申请号：US17142821

申请日：2021-01-06

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masayuki HOGIRI ,  Yuki UEDA ,  Yoshihisa NAGASAKI ,  Kojiro OKUYAMA

IPC: F21S41/173 ,  G03B21/20

Abstract: A light source device includes: an excitation light source that emits excitation light having an energy density of 10 W/mm2 or more; and a phosphor layer that has phosphor particles embedded in the matrix. The phosphor particles include at least one selected from the group consisting of metal oxides represented by a following formula (1) and metal oxides represented by a following formula (2). Y3-x1-y1R1y1Cex1Al5-z1Gaz1O12  (1) Y3-x2-y2R2y2Cex2Al5-z2Scz2O12  (2) In the formula (1), R1 includes at least one selected from the group consisting of Gd and Tb, and x1, y1, and z1 satisfy 0.003≤x1≤0.03, 0≤y1≤2.1, and 0≤z1≤2.2, respectively. In the formula (2), R2 includes at least one selected from the group consisting of Gd and Tb, and x2, y2, and z2 satisfy 0.003≤x2≤0.03, 0≤y2≤2.1 and 0≤z2≤1.5, respectively.