Seoul Semiconductor Co., Ltd.

Litec-vermogensverwaltungsgesellschaft Mbh

Bo Yong Han

Ho Jun Byun

Jun Ho Song

Stefan Tews

Thomas Jansen

Inbeom Song

Benjamin Kistner

A light emitting device including a blue light emitting portion configured to emit blue light, a green light emitting portion configured to emit green light, a red light emitting portion configured to emit red light, in which the blue light emitting portion include a first near-UV light emitting diode chip and a first wavelength conversion portion for wavelength conversion of near-UV light emitted from the first near-UV light emitting diode chip, blue light emitted from the blue light emitting portion includes a first peak wavelength in a wavelength band corresponding to near-UV light and a second peak wavelength in a wavelength band corresponding to blue light, and an intensity of the first peak wavelength is in a range of 0% to 20% of intensity of the second peak wavelength.

Light emitting device

A compound of the general formula (I): ABFMTOFdoped with Mn(IV), in which A is selected from the group consisting of Li, Na, K, Rb, Cs, Cu, Ag, Tl, NH4, NR4 and mixtures of two or more thereof, where R is an alkyl or aryl group, B is selected from the group consisting of H and D and mixtures thereof, where D is Deuterium, M is selected from the group consisting of Cr, Mo, W, Te, Re and mixtures of two or more thereof, T is selected from the group consisting of Si, Ge, Sn, Ti, Pb, Ce, Zr, Hf and mixtures of two or more thereof, and 0≤x≤1.

Color stable Mn-activated oxidofluorides as conversion luminescent materials for LED-based solid state light sources

A light emitting device is adapted to realize white light and includes a first light emitting diode chip emitting light having a first peak wavelength in the range of 400 nm to 420 nm, a second light emitting diode chip emitting light having a second peak wavelength in the range of 420 nm to 440 nm, and a wavelength converter covering the first and second light emitting diode chips. The wavelength converter including a blue phosphor, a green phosphor, and a red phosphor. When a maximum value of a spectral power distribution of the light emitting device or a maximum of a reference spectral power distribution of black body radiation is 100%, a difference between the spectral power distribution of the light emitting device and the reference spectral power distribution is less than 20% at each wavelength in the wavelength range of 440 nm to 640 nm.

Light emitting device and lighting apparatus including the same

A lighting apparatus including a controller, an LED driver, and an LED luminaire including: a first light emitting unit for general lighting; and at least one of a second light emitting unit to cause production of vitamin D upon irradiation, a third light emitting unit to cause production of a cell activating substance upon irradiation, and a fourth light emitting unit to sterilize pathogenic microorganisms, in which the controller controls the LED driver to change a color temperature of the first light emitting unit in accordance with a change in a color temperature of sunlight, and to change an irradiance of light emitted from at least one of the second, third, and fourth light emitting units according to time, and the LED luminaire includes a greater number of the first light emitting unit than any of the second, third, and fourth light emitting units.

LED lighting apparatus and lighting system having the same

A light emitting element including a housing having a cavity and an inner wall, a light emitting part disposed in the cavity to emit light having a peak wavelength in a blue wavelength band and including first and second light emitting chips spaced apart from each other, a lead portion to supply external electric power, and a wavelength converter including a first phosphor layer including a first phosphor to emit light having a peak wavelength in a green wavelength band, and a second phosphor layer including a second phosphor to emit light having a peak wavelength in a red wavelength band, in which the second phosphor includes at least one of a nitride-based red phosphor and a fluoride-based red phosphor represented by AMF:Mn, A is one of Li, Na, K, Ba, Rb, Cs, Mg, Ca, Se, and Zn, and M is one of Ti, Si, Zr, Sn, and Ge.

Wide color gamut light-emitting element

A light emitting device including at least one first light emitting unit including an ultraviolet or violet light emitting diode chip and a first wavelength converter, at least one second light emitting unit including an ultraviolet or violet light emitting diode chip and a second wavelength converter, and at least one third light emitting unit including an ultraviolet or violet light emitting diode chip and a third wavelength converter, in which color coordinates of the first light emitting unit, the second light emitting unit, and the third light emitting unit define a triangular region in a CIE-1931 coordinate system, the triangular region including at least a portion of the Plankian locus, and a maximum color temperature of the Plankian locus included in the triangular region is 5000K or higher, and a minimum color temperature of the Plankian locus included in the triangular region is 3000K or lower.

A lighting apparatus including a controller including a real time clock, an LED driver, and an LED luminaire including a first light emitting unit including a first LED to emit light having a peak wavelength between 300 to 470 nm and a wavelength converter, and at least one of a second light emitting unit to emit light having a peak wavelength between 286 to 304 nm to cause production of vitamin D, a third light emitting unit to emit light having a peak wavelength between 605 to 935 nm to cause production of a cell activating substance, and a fourth light emitting unit to emit light having a peak wavelength between 400 to 430 nm to sterilize pathogenic microorganisms, in which the controller controls the LED driver to change an irradiance of light emitted from at least one of the light emitting units according to time.

A light emitting device including a blue light emitting portion configured to emit blue light, a green light emitting portion configured to emit green light, and a red light emitting portion configured to emit red light, in which the blue light emitting portion includes a near-UV light emitting diode chip and a first wavelength conversion portion for wavelength conversion of near-UV light emitted from the near-UV light emitting diode chip, the blue light emitted from the blue light emitting portion includes a first peak wavelength in a wavelength band corresponding to near-UV light and a second peak wavelength in a wavelength band corresponding to blue light, and an intensity of the first peak wavelength is in a range of 0% to 20% of an intensity of the second peak wavelength.

Growing community of inventors

Ansan-si, South Korea

Bo Yong Han