Light Emitting Module and Lighting Device
AssigneeToshiba Lighting & Technology Corporation
InventorsMiho Watanabe, Tsuyoshi Oyaizu
Life of this patent
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Abstract
A light emitting module according to one embodiment includes a substrate; a light emitting body disposed on the substrate; a first phosphor which is excited by emitted light of the light emitting body; and a second phosphor which is arranged between the first phosphor and the light emitting body. The first phosphor has a light emitting peak whose half-value width is 20 nm or less in a wavelength range from 610 nm to less than 650 nm. The second phosphor is excited by the emitted light of the light emitting body, and has the light emitting peak in the wavelength range between a peak wavelength of a light emitting spectrum of the light emitting body and the peak wavelength of the light emitting spectrum of the first phosphor.
Claims15
A light emitting module comprising:
- a substrate;
- a light emitting body disposed on the substrate;
- a first phosphor which is excited by emitted light of the light emitting body and has a light emitting peak whose half-value width is 20 nm or less in a wavelength range from 610 nm to less than 650 nm;
- and
- a second phosphor arranged between the first phosphor and the light emitting body, excited by the emitted light of the light emitting body, and having the light emitting peak in the wavelength range between a peak wavelength of a light emitting spectrum of the light emitting body and the peak wavelength of the light emitting spectrum of the first phosphor.
A lighting device comprising:
- a light emitting module including a substrate;
- a light emitting body disposed on the substrate;
- a first phosphor which is excited by emitted light of the light emitting body and has a light emitting peak whose half-value width is 20 nm or less in a wavelength range from 610 nm to less than 650 nm;
- and a second phosphor which is arranged between the first phosphor and the light emitting body and is excited by the emitted light of the light emitting body, having the light emitting peak in the wavelength range between a peak wavelength of a light emitting spectrum of the light emitting body and the peak wavelength of the light emitting spectrum of the first phosphor;
- and
- a housing on which the light emitting module is mounted.
Dependencies are inferred from the claim text.