公开(公告)号：US20190259918A1

公开(公告)日：2019-08-22

申请号：US16342390

申请日：2017-10-20

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shohei TAKAKU ,  Yusuke KATSU ,  Tsuneyuki ITO ,  Yuki SHIMURA ,  Takeshi MITSUOKA ,  Jun MOTEKI

IPC: H01L33/50 ,  C04B35/50

Abstract: An optical wavelength conversion member and a light-emitting device including the optical wavelength conversion member. The optical wavelength conversion member (9) is formed of a ceramic sintered body having a fluorescent phase containing fluorescent crystal grains as a main component and a translucent phase containing translucent crystal grains as a main component. Crystal grains of the fluorescent phase have a composition represented by formula A3B5O12:Ce, where the element A is selected from Sc, Y, and lanthanoids (except for Ce), and the element B is selected from Al and Ga. In the optical wavelength conversion member (9), 0.3

公开(公告)号：US20210098657A1

公开(公告)日：2021-04-01

申请号：US17058340

申请日：2019-05-10

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Tsuneyuki ITO ,  Shohei TAKAKU ,  Yuki SHIMURA ,  Shinji BAN ,  Yusuke KATSU

IPC: H01L33/50 ,  C04B35/80 ,  C04B35/115 ,  H01L33/64

Abstract: An optical wavelength conversion member according to one aspect of the present disclosure includes a ceramic sintered body, wherein the ceramic sintered body has a fluorescent phase containing, as a main. component, fluorescent crystal grains that generate fluorescence in response to incident light, and a translucent phase containing translucent crystal grains as a main component. The optical wavelength conversion member includes a metal layer having light reflectivity and provided on a side of the ceramic sintered body opposite the side on which the light is incident, and a dielectric multilayer film including dielectric layers having different optical refractive indices and provided between the ceramic sintered body and the metal layer.

公开(公告)号：US20200303597A1

公开(公告)日：2020-09-24

申请号：US16651434

申请日：2018-09-10

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Syohei TAKAKU ,  Yusuke KATSU ,  Tsuneyuki ITO ,  Yuki SHIMURA ,  Shinji BAN ,  Takeshi MITSUOKA

IPC: H01L33/50 ,  F21V7/30 ,  F21V29/502 ,  F21V13/08 ,  F21V9/32 ,  C04B35/117

Abstract: An optical wavelength converter (1) is configured such that an optical wavelength conversion member (9) is bonded to a heat dissipation member (13) having superior heat dissipation property. Thus, heat generated by light incident on the optical wavelength conversion member (9) can be efficiently dissipated. Therefore, even when high-energy light is incident on the optical wavelength converter, temperature quenching is less likely to occur, and thus high fluorescence intensity can be maintained. An intermediate film (21) is disposed between a reflective film (19) and a bonding portion (15). The presence of the intermediate film (21) improves the adhesion between the reflective film (19) and the bonding portion (15), thereby enhancing the heat dissipation from the optical wavelength conversion member (9) to the heat dissipation member (13). Thus, the temperature quenching of the optical wavelength conversion member (9) can be prevented, thereby enhancing fluorescence intensity.