Light emitting device
First Claim
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1. A light emitting device comprising:
- a light emitting element and a fluorescent substance that is excited by the light emitting element,wherein said light emitting element has an emission spectrum in a region ranging from ultraviolet to visible light of short wavelengths, and said fluorescent substance includes a first fluorescent substance and a second fluorescent substance, said first fluorescent substance having an emission spectrum that includes two or more emission peaks with at least two peaks of the two or more peaks being in the relation of complementary colors of each other, said emission spectrum of said first fluorescent substance having a peak wavelength that is in the relationship of complementary colors with the peak wavelength of the emission spectrum of the second fluorescent substance.
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Abstract
To minimize the variability in the emitted light color and improve the unevenness of color tone, a light emitting device comprises a light emitting element and a fluorescent substance that is excited by the light emitting element, wherein the light emitting element has an emission spectrum in a region from ultraviolet to visible light of short wavelengths, and the fluorescent substance has an emission spectrum that includes two or more emission peaks with at least two peaks of the two or more peaks being in the relation of complementary colors of each other.
74 Citations
63 Claims
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1. A light emitting device comprising:
- a light emitting element and a fluorescent substance that is excited by the light emitting element,
wherein said light emitting element has an emission spectrum in a region ranging from ultraviolet to visible light of short wavelengths, and said fluorescent substance includes a first fluorescent substance and a second fluorescent substance, said first fluorescent substance having an emission spectrum that includes two or more emission peaks with at least two peaks of the two or more peaks being in the relation of complementary colors of each other, said emission spectrum of said first fluorescent substance having a peak wavelength that is in the relationship of complementary colors with the peak wavelength of the emission spectrum of the second fluorescent substance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
- a light emitting element and a fluorescent substance that is excited by the light emitting element,
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31. A light emitting device comprising:
- a light emitting element and a fluorescent substance that is excited by the light emitting element,
wherein said light emitting element has an emission spectrum in a region ranging from ultraviolet to visible light of short wavelengths, and said fluorescent substance includes a first fluorescent substance and a second fluorescent substance, said first fluorescent substance having an emission spectrum that includes two or more emission peaks with at least two peaks of the two or more peaks being in the relation of complementary colors of each other, the ratios between said two or more peaks are kept substantially constant to fluctuation of emission wavelength, wherein said emission spectrum of said first fluorescent substance has a peak wavelength that is in the relationship of complementary colors with the peak wavelength of the emission spectrum of the second fluorescent substance. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
- a light emitting element and a fluorescent substance that is excited by the light emitting element,
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61. A light emitting device comprising:
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a light emitting element having an emission spectrum in a region ranging from ultraviolet to visible light of short wavelengths, and a fluorescent substance having a first fluorescent substance which is excited by the light emitting element and a second fluorescent substance, said first fluorescent substance having an emission spectrum having two emission peaks which are in the relation of complementary colors of each other, said second fluorescent substance having an emission spectrum having one emission peak, wherein a mixed light of a light emitted from said first fluorescent substance and a light emitted from said second fluorescent substance has an emission spectrum having two emission peaks. - View Dependent Claims (62, 63)
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Specification