公开(公告)号：US11257991B2

公开(公告)日：2022-02-22

申请号：US16732586

申请日：2020-01-02

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sungwoo Choi ,  Seongmin Kim ,  Inhyung Lee

IPC: H01L33/50 ,  H01L25/075 ,  H01L33/06 ,  H01L33/56

Abstract: A light emitting device includes a first LED chip to emit a light having a peak wavelength in a range of 410 to 430 nm, a second LED chip to emit a light having a peak wavelength in a range of 440 to 460 nm, a first quantum dot to convert light emitted by the first and second LED chips into light having a peak wavelength in a range of 510 to 550 nm, and a second quantum dot to convert light emitted by the first and second LED chips into light having a peak wavelength in a range of 610 to 660 nm, wherein, in an emission spectrum of final light, intensity of a peak wavelength of the first LED chip is 15% or less of intensity of a peak wavelength of the second LED chip.

公开(公告)号：US11236869B2

公开(公告)日：2022-02-01

申请号：US16901478

申请日：2020-06-15

Applicant: Samsung Electronics Co., Ltd.

Inventor： Chohui Kim ,  Seulgee Lee ,  Sungwoo Choi ,  Inhyung Lee

IPC: F21K9/64 ,  F21V23/00 ,  A01G7/04 ,  F21Y115/10

Abstract: A light emitting device for plant growth includes a blue light emitting diode (LED) configured to emit blue light, and at least one wavelength converting material configured to be excited by the blue light and convert the blue light into light having a different wavelength, the converted light being light for plant growth. An emission spectrum of the light for plant growth is when a photosynthetic photon flux (PPF) in a 400 nm to 500 nm band is 1, a PPF in a 500 nm to 600 nm band is in a range of 6 to 10, and a PPF in a 600 nm to 700 nm is in a range of 5 to 7.