Samsung Electronics Co., Ltd.

Seulgee Lee

Sungwoo Choi

Chohui Kim

Seongmin Kim

Jeongeun Yun

Jeongrok Oh

Chulsoo Yoon

Inhyung Lee

A white light emitting device is provided. The white light emitting device includes a blue light emitting diode configured to emit blue light having a peak wavelength in a first range of 440 nm to 455 nm; a first wavelength conversion material, based on being excited by the blue light, emits first light having a peak wavelength in a second range of 535 nm to 550 nm and a full width at half maximum (FWHM) of 60 nm or less; and a second wavelength conversion material, based on being excited by the blue light, emits second light having a peak wavelength in a third range of 620 nm to 660 nm, wherein a melanopic photopic ratio of white light emitted from the white light emitting device is 0.65 or less, and a color rendering index (CRI) of the white light is 80 or more.

White light emitting device and lighting apparatus

A light emitting diode (LED) module that is configured to emit white light is provided. The LED module includes: a blue light emitting diode configured to emit blue light having a first peak wavelength of 420 nm to 465 nm; at least one wavelength conversion material that is configured to convert a portion of the blue light into converted light of a different wavelength; and a near-infrared light source configured to emit additional light having a second peak wavelength in a range of 740 nm to 900 nm and a full width at half maximum (FWHM) of 120 nm or less. The converted light, another portion of the blue light, and the additional light combine to form the white light.

LED module and lighting apparatus

An LED lighting apparatus, including an LED light source configured to emit white light having a first melanopic/photopic (M/P) ratio; a tuning LED light source configured to emit tuning blue light having a peak wavelength in a range of 465 nm to 495 nm; and a driving control unit configured to control currents respectively applied to the LED light source and the tuning LED light source to generate tuned white light having a second M/P ratio higher than the first M/P ratio

LED lighting apparatus

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.

Growing community of inventors

Suwon-si, South Korea

Seulgee Lee