Light emitting apparatus with two primary lighting peaks
First Claim
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1. A light emitting apparatus comprising:
- a substrate;
a dam ring which is provided on an upper surface of the substrate and has an annular shape;
at least one light emitting element that emits both first primary light having a peak emission wavelength in a wavelength range of 440 nm or longer and shorter than 460 nm and second primary light having a peak emission wavelength in a wavelength range of 460 nm to 490 nm; and
a phosphor,wherein the phosphor is either of a phosphor which includes a green phosphor that is excited by either or both of the first primary light and the second primary light and emits first fluorescent light having a peak emission wavelength in a green region and a red phosphor that is excited by either or both of the first primary light and the second primary light and emits second fluorescent light having a peak emission wavelength in a red region, and a phosphor which includes the green phosphor that emits the first fluorescent light, the red phosphor that emits the second fluorescent light, and a blue phosphor that is excited by either or both of the first primary light and the second primary light and emits third fluorescent light having a peak emission wavelength in a blue region,in an emission spectrum of the light emitting apparatus, first light emission intensity E1 is smallest light emission intensity in a wavelength range of 450 nm to 500 nm, second light emission intensity E2 is largest light emission intensity in a wavelength range of 430 nm to 460 nm, and a ratio (E2/E1) of the second light emission intensity E2 to the first light emission intensity E1 is equal to or smaller than 3.0,light having a correlated color temperature of 2000 K to 6500 K and having an average color rendering index Ra which is equal to or greater than 97 even at any correlated color temperature in a range of 2000 K to 6500 K is emitted, andthe light emitting elements are arranged at an equal interval in a region surrounded by the dam ring on the upper surface of the substrate.
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Abstract
A light emitting apparatus that includes at least one kind of light emitting elements of which the number is one or more, and a phosphor that is excited by output light of the light emitting element. In a case where all light emitting elements mounted before the phosphor is mounted in the light emitting apparatus emit light, the light emitting apparatus has a peak wavelength of output light in a first wavelength region of 440 nm or longer and shorter than 460 nm, and has a peak wavelength of output light in a second wavelength region of 460 nm to 490 nm.
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3 Claims
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1. A light emitting apparatus comprising:
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a substrate; a dam ring which is provided on an upper surface of the substrate and has an annular shape; at least one light emitting element that emits both first primary light having a peak emission wavelength in a wavelength range of 440 nm or longer and shorter than 460 nm and second primary light having a peak emission wavelength in a wavelength range of 460 nm to 490 nm; and a phosphor, wherein the phosphor is either of a phosphor which includes a green phosphor that is excited by either or both of the first primary light and the second primary light and emits first fluorescent light having a peak emission wavelength in a green region and a red phosphor that is excited by either or both of the first primary light and the second primary light and emits second fluorescent light having a peak emission wavelength in a red region, and a phosphor which includes the green phosphor that emits the first fluorescent light, the red phosphor that emits the second fluorescent light, and a blue phosphor that is excited by either or both of the first primary light and the second primary light and emits third fluorescent light having a peak emission wavelength in a blue region, in an emission spectrum of the light emitting apparatus, first light emission intensity E1 is smallest light emission intensity in a wavelength range of 450 nm to 500 nm, second light emission intensity E2 is largest light emission intensity in a wavelength range of 430 nm to 460 nm, and a ratio (E2/E1) of the second light emission intensity E2 to the first light emission intensity E1 is equal to or smaller than 3.0, light having a correlated color temperature of 2000 K to 6500 K and having an average color rendering index Ra which is equal to or greater than 97 even at any correlated color temperature in a range of 2000 K to 6500 K is emitted, and the light emitting elements are arranged at an equal interval in a region surrounded by the dam ring on the upper surface of the substrate. - View Dependent Claims (3)
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2. A light emitting apparatus comprising:
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a substrate; a resin dam which is provided on an upper surface of the substrate and has an annular shape; at least two of first light emitting elements that emit first primary light having a peak emission wavelength in a wavelength range of 440 nm or longer and shorter than 460 nm; at least two of second light emitting elements that emit second primary light having a peak emission wavelength in a wavelength range of 460 nm to 490 nm; and a phosphor, wherein the phosphor is either of a phosphor which includes a green phosphor that is excited by either or both of the first primary light and the second primary light and emits first fluorescent light having a peak emission wavelength in a green region and a red phosphor that is excited by either or both of the first primary light and the second primary light and emits second fluorescent light having a peak emission wavelength in a red region, and a phosphor which includes the green phosphor that emits the first fluorescent light, the red phosphor that emits second fluorescent light, and a blue phosphor that is excited by either or both of the first primary light and the second primary light and emits third fluorescent light having a peak emission wavelength in a blue region, in an emission spectrum of the light emitting apparatus, first light emission intensity E1 is smallest light emission intensity in a wavelength range of 450 nm to 500 nm, second light emission intensity E2 is largest light emission intensity in a wavelength range of 430 nm to 460 nm, and a ratio (E2/E1) of the second light emission intensity E2 to the first light emission intensity E1 is equal to or smaller than 3.0, light having a correlated color temperature of 2000 K to 6500 K and having an average color rendering index Ra which is equal to or greater than 97 even at any correlated color temperature in a range of 2000 K to 6500 K is emitted, and the first light emitting elements and the second light emitting elements are disposed at a portion of the upper surface of the substrate, which is positioned on an inner side of the resin dam, with high density.
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Specification