Solid State Lighting Devices Including Light Mixtures
First Claim
1. A solid state lighting apparatus comprising:
- a plurality of light emitting diodes (LEDs) including at least a first LED and a second LED, wherein a combined light generated by a mixture of light from the pair of LEDs has about a target chromaticity, wherein the first LED includes a first LED chip that emits light in the blue or green portions of the visible spectrum and includes a phosphor that emits red light in response to light emitted by the first LED chip, and the second LED emits light having a color point that is above the planckian locus of a 1931 CIE Chromaticity diagram.
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Abstract
A solid state lighting apparatus includes a plurality of light emitting diodes (LEDs) including at least a first LED and a second LED. Chromaticities of the first and second LEDs are selected so that a combined light generated by a mixture of light from the pair of LEDs has about a target chromaticity. The first LED may include a first LED chip that emits light in the blue portion of the visible spectrum and a phosphor that emits red light in response to blue light emitted by the first LED chip. The second LED emits light having a color point that is above the planckian locus of a 1931 CIE Chromaticity diagram, and in particular may have a yellow green, greenish yellow or green hue.
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Citations
30 Claims
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1. A solid state lighting apparatus comprising:
a plurality of light emitting diodes (LEDs) including at least a first LED and a second LED, wherein a combined light generated by a mixture of light from the pair of LEDs has about a target chromaticity, wherein the first LED includes a first LED chip that emits light in the blue or green portions of the visible spectrum and includes a phosphor that emits red light in response to light emitted by the first LED chip, and the second LED emits light having a color point that is above the planckian locus of a 1931 CIE Chromaticity diagram. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A solid state lighting apparatus comprising:
a plurality of light emitting diodes (LEDs), wherein chromaticities of the LEDs are selected so that a combined light generated by a mixture of light emitted of the LEDs has about a target chromaticity, wherein the plurality of LEDs comprises a first LED including a first LED chip that emits saturated light in the blue portion of the visible spectrum and a first phosphor that emits red light in response to blue light emitted by the first LED chip, and one of (a) a second LED that emits saturated light in the green portion of the visible spectrum or (b) a second LED including a second LED chip that emits saturated light in the blue portion of the visible spectrum and that includes a second phosphor that emits yellow light in response to light emitted by the second LED chip wherein a combined light emitted by the second LED chip and the second phosphor falls outside a 10-step Macadam ellipse about a point on the planckian locus on a 1931 CIE Chromaticity diagram. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. An illumination module, comprising:
a plurality of light emitting diodes (LEDs) including a metameric pair of LEDs, wherein chromaticities of the LEDs of the metameric pair are selected so that a combined light generated by a mixture of light from each of the LEDs of the metameric pair comprises light having about a target chromaticity, the metameric pair comprising a first LED including a first LED chip that emits light in the blue portion of the visible spectrum and a phosphor that emits red light in response to blue light emitted by the first LED chip, and a second LED that emits non-white light that in the absence of other light appears green, yellowish-green or yellow-green. - View Dependent Claims (25)
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26. A solid state lighting apparatus comprising:
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a plurality of light emitting diodes (LEDs) including at least a first LED and a second LED; wherein a combined light generated by a mixture of light from the pair of LEDs has about a target chromaticity; wherein the first LED includes a first LED chip that emits light in the blue or green portions of the visible spectrum and includes a phosphor that emits red light in response to light emitted by the first LED chip wherein a combined light of the first LED chip and the phosphor has a first color point, wherein the second LED emits light having a second color point; and wherein a line segment on a 1931 CIE Chromaticity diagram between the first color point and the second color point crosses the planckian locus between about 2500 Kelvin and 4500 Kelvin. - View Dependent Claims (27, 28, 29, 30)
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Specification