Light emitting apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorJoon Sub LEE
Life of this patent
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Abstract
A light emitting apparatus includes a light emitting unit including a monochromatic light source configured to emit light having a predetermined color, and a wavelength conversion element configured to generate white light from the light emitted by the monochromatic light source, a spectrum detection unit configured to detect a first spectrum distribution from the light emitted by the monochromatic light source, and detect a second spectrum distribution from the white light, and a controller configured to compare the first spectrum distribution and the second spectrum distribution with a first reference spectrum distribution and a second reference spectrum distribution, respectively, and adjust at least one of a wavelength and an intensity of the light emitted by the monochromatic light source.
Claims20
A light emitting apparatus, comprising:
- a light emitting unit including a monochromatic light source configured to emit light having a predetermined color, and a wavelength conversion element configured to generate white light from the light emitted by the monochromatic light source;
- a spectrum detection unit configured to detect a first spectrum distribution from the light emitted by the monochromatic light source, and detect a second spectrum distribution from the white light;
- and
- a controller configured to compare the first spectrum distribution and the second spectrum distribution with a first reference spectrum distribution and a second reference spectrum distribution, respectively, and adjust at least one of a wavelength and an intensity of the light emitted by the monochromatic light source.
A light emitting apparatus, comprising:
- a monochromatic light source configured to emit light having a predetermined dominant wavelength;
- a wavelength conversion element including a phosphor having light conversion efficiency determined by characteristics of the light emitted by the monochromatic light source, and configured to generate white light from the light emitted by the monochromatic light source;
- a spectrum detection unit configured to detect spectrum distributions of the white light emitted by the wavelength conversion element;
- and
- a controller configured to compare the detected spectrum distribution with a predetermined reference spectrum distribution and adjust an operation of the monochromatic light source,
- wherein when an intensity in a wavelength band emitted by the monochromatic light source in the detected spectrum distribution is the same as an intensity in a wavelength band emitted by the monochromatic light source in the reference spectrum distribution, the controller compares an intensity in a wavelength band converted by the phosphor in the detected spectrum distribution with an intensity in a wavelength band converted by the phosphor in the reference spectrum distribution, and determines a presence of an error in the spectrum detection unit.
A light emitting apparatus, comprising:
- a light emitting unit including a monochromatic light source emitting light having a predetermined color;
- a wavelength conversion element converting the light emitted by the monochromatic light source to light having a different color from the predetermined color;
- a first spectrum detector receiving the light emitted by the monochromatic light source through an optical splitter interposed on a path by which the light emitted by the monochromatic light source is transferred to the wavelength conversion element, and detecting a first spectrum distribution;
- and
- a controller configured to adjust a wavelength of the light emitted by the monochromatic light source, based on a result of comparing the first spectrum distribution with a first reference spectrum distribution.
Dependencies are inferred from the claim text.