White light emitting device
First Claim
1. A white light emitting device, comprising:
- a light emitting element having a peak wavelength of 500 nm or less;
a first phosphor absorbing a light emitted from the light emitting element and emitting a light having a yellow wavelength different from a wavelength of the light absorbed; and
a second phosphor having an emission wavelength different from at least that of the first phosphor.
2 Assignments
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Accused Products
Abstract
A purple LED (19) is fixed onto lead frames (14, 15) in the cup (17a) of a frame (17) using a mount (21), and the purple LED (19) is sealed by filling a sealant (26) of transparent resin into the cup (17a). Red/green/blue phosphors (28-30) that absorb a light emitted by the purple LED (19) and emit lights having red, green, blue wavelengths different from the wavelength of this absorbed light are mixed into the sealant (26). A yellow phosphor (31) that absorbs a light emitted by the purple LED (19) and emits a light having a yellow wavelength different from the wavelength of this absorbed light is additionally mixed into the sealant (26) in such a white light emitting device.
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Citations
15 Claims
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1. A white light emitting device, comprising:
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a light emitting element having a peak wavelength of 500 nm or less;
a first phosphor absorbing a light emitted from the light emitting element and emitting a light having a yellow wavelength different from a wavelength of the light absorbed; and
a second phosphor having an emission wavelength different from at least that of the first phosphor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A white light emitting device;
- comprising;
a light emitting element made of a GaN-based semiconductor and emitting a purple light which is disposed in a cup of a mount lead; and
a sealant made of a transparent resin filled in the cup and sealing the light emitting element;
red, green, and blue phosphors absorbing a light emitted from the light emitting element and emitting red, green, and blue lights of wavelengths different from that of the light absorbed, respectively, and a yellow phosphor absorbing a light emitted from the light emitting element and emitting a yellow light of a wavelength different from that of the light absorbed being mixed into the sealant. - View Dependent Claims (12)
- comprising;
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13. A white light emitting device, comprising:
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a light emitting element made of a GaN-based semiconductor and emitting a purple light which is disposed in a cup of a mount lead;
a sealant made of a transparent resin filled in the cup and sealing the light emitting element;
a lens-shaped mold member made of a transparent resin and covering the cup filled with the sealant and a part of the mount lead; and
a fluorescence cover fitted to the mold member and to which red, green, and blue phosphors absorbing a light emitted from the light emitting element and emitting red, green, and blue lights of wavelengths different from that of the light absorbed, respectively, are mixed into;
a yellow phosphor absorbing a light emitted from the light emitting element and emitting a yellow light of a wavelength different from that of the light absorbed is mixed into the fluorescence cover.
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14. A white light emitting device, comprising:
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a light emitting element emitting a purple light; and
a substantially rectangular light guidance plate guiding a light emitted from the light emitting element to outgo the light from a light-outgoing surface;
red, green, and blue phosphors absorbing a light emitted from the light emitting element and emitting red, green, and blue lights of wavelengths different from that of the light absorbed, respectively, and a yellow phosphor absorbing a light emitted from the light emitting element and emitting a yellow light of a wavelength different from that of the light absorbed being applied onto the light-outgoing surface of the light guidance plate.
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15. A white light emitting device, comprising:
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a light emitting element emitting a purple light;
a substantially rectangular light guidance plate guiding a light emitted from the light emitting element to outgo the light from a light-outgoing surface; and
a film to which red, green, and blue phosphors absorbing a light emitted from the light emitting element and emitting red, green, and blue lights of wavelengths different from that of the light absorbed, respectively, are mixed into;
a yellow phosphor absorbing a light emitted from the light emitting element and emitting a yellow light of a wavelength different from that of the light absorbed being mixed into the film.
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Specification