Light Source Comprising Light-Emitting Clusters
First Claim
1. A light source for producing a spectral output at an output intensity, the light source comprising:
- one or more light-emitting clusters of a first type, each one of which comprising a first combination of one or more light-emitting elements in each of at least a first, a second and a third colour;
one or more light-emitting clusters of a second type, each one of which comprising a second combination of one or more light emitting elements in one or more of said first, said second and said third colour; and
a driving element for driving said light-emitting clusters;
wherein, when driven at the output intensity, the spectral output is provided by a combined spectral output of said one or more light-emitting clusters of said first type and said one or more light-emitting clusters of said second type.
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Abstract
The present invention provides a light source for producing a substantially balanced output at a substantially optimised output intensity. In one embodiment, the light source comprises one or more light-emitting clusters of a first type and one or more light-emitting clusters of one or more other types, each one of which comprising one or more light-emitting elements, such that, when all light-emitting elements are driven to provide a substantially optimised output intensity, the spectral output of the one or more light-emitting clusters of the first type is substantially balanced by the spectral output of the one or more other light-emitting clusters.
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Citations
25 Claims
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1. A light source for producing a spectral output at an output intensity, the light source comprising:
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one or more light-emitting clusters of a first type, each one of which comprising a first combination of one or more light-emitting elements in each of at least a first, a second and a third colour;
one or more light-emitting clusters of a second type, each one of which comprising a second combination of one or more light emitting elements in one or more of said first, said second and said third colour; and
a driving element for driving said light-emitting clusters;
wherein, when driven at the output intensity, the spectral output is provided by a combined spectral output of said one or more light-emitting clusters of said first type and said one or more light-emitting clusters of said second type. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A light source for producing a spectral output at an output intensity, the light source comprising:
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one or more light-emitting clusters of each of a first type and of one or more other types; and
a driving element for driving said one or more light-emitting clusters of said first type and of said one or more other types;
each cluster of said first type comprising one or more light-emitting elements in each of at least a first, a second and a third colour having respective output efficiencies, wherein one or more of said respective output efficiencies are lower than one or more others of said respective output efficiencies; and
each cluster of said one or more other types comprising one or more light-emitting elements selected to compensate for said one or more lower respective output efficiencies such that, when driven to provide the output intensity, a spectral output of said one or more light-emitting clusters of said first type is substantially balanced by a spectral output of said one or more light-emitting clusters of said one or more other types. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification