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US 12,009,348 B2Granted
Light emitting device and lighting system having the same
AssigneeSeoul Semiconductor Co., Ltd.
InventorsGundula Roth, Walter Tews, Chung-Hoon Lee
Life of this patent
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Abstract
A light emitting device including a first light emitting portion that emits white light at a color temperature of 6000K or more and a second light emitting portion that emits white light at a color temperature of 3000K or less, which include light emitting diode chips and phosphors and are independently driven.
Claims20
A light emitting device, comprising:
- a base plate;
- and
- a plurality of dots disposed on the base plate and including a plurality of first dots and a plurality of second dots,
- wherein:
- each first dot of the plurality of first dots includes a first light emitter comprising a first light emitting chip and a first phosphor configured to combine with the first light emitting chip to emit a first light spectrum;
- each second dot of the plurality of second dots includes a second light emitter comprising a second light emitting chip and a second phosphor configured to combine with the second light emitting chip to emit a second light spectrum;
- the first light emitter and the second light emitter are disposed on the base plate;
- each of the plurality of first dots and each of the plurality of second dots are arranged alternately with one another;
- the first light emitting chip and the second light emitting chip are configured to emit light with a peak wavelength of blue or ultraviolet (UV) light;
- a relative intensity of light at the peak wavelength of the first light emitting chip in an emission spectrum of the first light emitter is higher than a relative intensity of light at the peak wavelength of the second light emitting chip in an emission spectrum of the second light emitter;
- and
- the relative intensity of light at the peak wavelength of the second light emitting chip in the emission spectrum of the second emitter is lower than a maximum intensity of light within a wavelength range of green light in the emission spectrum of the second emitter or a maximum intensity of light within wavelength range of red light in the emission spectrum of the second emitter.
9 more elements
A light emitting device, comprising:
- a base plate;
- and
- a plurality of dots disposed on the base plate and including a plurality of first dots and a plurality of second dots,
- wherein:
- each first dot of the plurality of first dots includes a first light emitter comprising a first light emitting chip and a first phosphor configured to combine with the first light emitting chip to emit daylight having a color temperature equal to or greater than 6000K;
- each second dot of the plurality of second dots includes a second light emitter comprising a second light emitting chip and a second phosphor configured to combine with the second light emitting chip to emit warm white light having a color temperature less than or equal to 3000K;
- the first light emitter and the second light emitter are disposed on the base plate;
- each of the plurality of first dots and each of the plurality of second dots are arranged alternately with one another;
- the first light emitting chip and the second light emitting chip are configured to emit light with a peak wavelength of blue or ultraviolet (UV) light;
- a relative intensity of light at the peak wavelength of the first light emitting chip in an emission spectrum of the first light emitter is higher than a relative intensity of light at the peak wavelength of the second light emitting chip in an emission spectrum of the second light emitter;
- and
- the relative intensity of light at the peak wavelength of the second light emitting chip in the emission spectrum of the second emitter is lower than a maximum intensity of light within a wavelength range of green light in the emission spectrum of the second emitter or a maximum intensity of light within wavelength range of red light in the emission spectrum of the second emitter.
9 more elements
Dependencies are inferred from the claim text.