Light emitting apparatus
First Claim
1. A light emitting apparatus comprising;
- a first light emitting device that has a first peak emission wavelength in a short wavelength region of visible light, a fluorescent material that converts light emitted by the first light emitting device to light of a different wavelength and, a second light emitting device that has a second peak emission wavelength which is longer than the first peak emission wavelength and is shorter than the peak emission wavelength of the fluorescent material, wherein the light emitted by the first light emitting device, the light emitted by the fluorescent material and the light emitted by the second light emitting device are mixed and emitted to the outside.
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Accused Products
Abstract
An object of the present invention is to provide a light emitting apparatus that allows it to easily control the driving of LED and has high color rendering properties.
The light emitting apparatus comprises the first light emitting device 108a that has first peak emission wavelength in blue region and emits blue light, the fluorescent material 140 that is excited by the light from the first light emitting device 108a and emits red light, the second light emitting device 108b that has second peak emission wavelength which is longer than the first peak emission wavelength and is shorter than peak emission wavelength of the fluorescent material 140, and the second light emitting device 108b that emits green light of second peak emission wavelength which is longer than the first peak emission wavelength, so as to emit light generated by blending of blue light, green light and red light to the outside.
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Citations
9 Claims
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1. A light emitting apparatus comprising;
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a first light emitting device that has a first peak emission wavelength in a short wavelength region of visible light, a fluorescent material that converts light emitted by the first light emitting device to light of a different wavelength and, a second light emitting device that has a second peak emission wavelength which is longer than the first peak emission wavelength and is shorter than the peak emission wavelength of the fluorescent material, wherein the light emitted by the first light emitting device, the light emitted by the fluorescent material and the light emitted by the second light emitting device are mixed and emitted to the outside. - View Dependent Claims (2, 3)
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4. A light emitting apparatus comprising;
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a first light emitting device that has a first peak emission wavelength in ultraviolet region, a fluorescent material that converts light emitted by the first light emitting device to light of a different wavelength and, a second light emitting device that has a second peak emission wavelength longer than the first peak emission wavelength, wherein the light emitted by the fluorescent material and the light emitted by the second light emitting device are mixed and emitted to the outside. - View Dependent Claims (5, 6)
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7. A light emitting apparatus comprising;
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a first light emitting device that has a first peak emission wavelength, a fluorescent material that converts the light emitted by the first light emitting device to light of a different wavelength and;
a second light emitting device that has a second peak emission wavelength longer than the first peak emission wavelength, wherein the first light emitting device and the second light emitting device are nitride compound semiconductors that emit light of different colors, and at least two of the light emitted by the first light emitting device, the light emitted by the fluorescent material and the light emitted by the second light emitting device are mixed and emitted to the outside. - View Dependent Claims (8, 9)
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Specification