Illumination apparatus and method for generating white light
First Claim
1. An illumination apparatus comprising:
- a first light-emitting device for emitting a light having a first wavelength;
a second light-emitting device for emitting a light having a second wavelength; and
a third light-emitting device for emitting a light having a third wavelength to be selectively mixed with the light having the first wavelength or the light having the second wavelength to form a white light represented by a chromaticity coordinate point substantially located on a Black Body Locus on a CIE chromaticity diagram;
wherein a color of the light having the third wavelength is determined by a linear relationship between corresponding coordinate points which represent the light having the first wavelength and a white light having a first color temperature on the CIE chromaticity diagram, and by a linear relationship between corresponding coordinate points which represent the light having the second wavelength and a white light having a second color temperature on the CIE chromaticity diagram.
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Accused Products
Abstract
An illumination apparatus includes a first light-emitting device, a second light-emitting device, and a third light-emitting device. The light emitted from the third light-emitting device is selectively mixed with the light emitted from the first light-emitting device or the second light-emitting device to form a white light having a chromaticity coordinate point substantially located on a Black Body Locus. A color of the light emitted from the third light-emitting device is determined by linear relationships between chromaticity coordinate points corresponding to wavelengths of the lights emitted form the first light-emitting device and the second light-emitting device and corresponding to a color temperature of the white light. A method for generating a white light is also disclosed herein.
5 Citations
24 Claims
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1. An illumination apparatus comprising:
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a first light-emitting device for emitting a light having a first wavelength; a second light-emitting device for emitting a light having a second wavelength; and a third light-emitting device for emitting a light having a third wavelength to be selectively mixed with the light having the first wavelength or the light having the second wavelength to form a white light represented by a chromaticity coordinate point substantially located on a Black Body Locus on a CIE chromaticity diagram; wherein a color of the light having the third wavelength is determined by a linear relationship between corresponding coordinate points which represent the light having the first wavelength and a white light having a first color temperature on the CIE chromaticity diagram, and by a linear relationship between corresponding coordinate points which represent the light having the second wavelength and a white light having a second color temperature on the CIE chromaticity diagram. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for generating a white light, comprising:
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fitting a first extension line through a coordinate point which represents a light having a first wavelength and a coordinate point which represents a white light having a maximum color temperature within a color temperature range and is substantially located on a Black Body Locus on a CIE chromaticity diagram; fitting a second extension line through a coordinate point which represent a light having a second wavelength and a coordinate point which represent a white light having a minimum color temperature within the color temperature range and is substantially located on the Black Body Locus; and providing a light having a third wavelength according to fitting results to be selectively mixed with the light having the first wavelength or the light having the second wavelength to form a white light, wherein a coordinate point which represents the light having the third wavelength on the CIE chromaticity diagram is substantially located where the first extension line intersects with the second extension line. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification