High colour quality luminaire

A method of manufacturing a light emitting unit, the method comprising the steps of:

• assembling a light emitting module by providing first, second, third, and fourth light emitting device (LED) packages and attaching them to a sub-mount;
• affixing a color mixing element proximal to the submount such that it is at least partially in a propagation path of the total light emitted by the light emitting module;
• affixing a memory module proximal to the light emitting module;
• activating the light emitting module and determining calibration parameters for the module;
• and,
• registering the calibration parameters on the memory module;
• wherein:
• the first LED package comprises a first semiconductor LED and a first wavelength converting element, wherein the first semiconductor when activated generates light comprising a first dominant wavelength λ1, wherein at least a portion of the light generated by the first semiconductor LED is incident on the first wavelength converting element and is re-emitted with a first converted optical spectrum comprising a first dominant converted wavelength λC1 such that λ1<λC1, wherein the color chromaticity of light emitted by the first light emitting package resides in a 1960 CIE Uniform Colour Space bounded by a lower isotherm at a correlated color temperature of T1 K and an upper isotherm at a correlated color temperature of 200,000 K, wherein an isotherm is defined as the line perpendicular to the Planckian locus, said light having a maximum color chromaticity shift of Δuv≦±0.10 from the Planckian locus;
• the second LED package comprises a second semiconductor LED and a second wavelength converting element, wherein when activated the second semiconductor generates light comprising a second dominant wavelength λ2, wherein at least a portion of the light generated by the second semiconductor LED is incident on the second wavelength converting element and is re-emitted with a second converted optical spectrum comprising a second dominant converted wavelength λC2 such that A2<λC2, wherein the second converted optical spectrum is different than the first converted optical spectrum and λC1≦λC2, and wherein the color chromaticity of light emitted by the second light emitting package resides in a 1960 CIE Uniform Colour Space bounded by an upper isotherm at a correlated color temperature of T2 K and a lower isotherm bounded at the correlated color temperature of 1,000 K, said light having a maximum color chromaticity shift Δuv≦±0.10 from the Planckian locus, wherein the correlated color temperature point of the intersection of the isotherm T1 K with the Planckian is greater than or equal to T2 K;
• the third LED package comprises a third semiconductor LED which, when activated, generates light comprising a third dominant wavelength λ3, which satisfies the criteria λ1,λ2<λ3<λC1,λC2 and 485 nm≦λ3≦595 nm;
• wherein the first, the second, and the third semiconductor LED comprise the same semiconductor material system;
• and
• the fourth LED package comprises a fourth semiconductor LED which, when activated, generates light comprising a fourth dominant wavelength λ4 in the wavelength range 405 nm≦λ4≦475 nm.

A light emitting system comprising:

• a light emitting module including a first light emitting device (LED) package, a second LED package, and a third LED package, the total light emitted by the module including light emitted by the first, second and third light emitting packages, wherein:
• the first LED package comprising a first semiconductor LED and a first wavelength converting element, wherein the first semiconductor LED, when activated, generates light comprising a first dominant wavelength λ1, and wherein at least a portion of the light generated by the first semiconductor LED is incident on the first wavelength converting element and is re-emitted with a first converted optical spectrum comprising a first dominant converted wavelength ΔC1 such that λ1<λC1, wherein the color chromaticity of light emitted by the first light emitting package resides in a 1960 CIE Uniform Colour Space bounded by a lower isotherm at a correlated color temperature of T1 K and an upper isotherm at a correlated color temperature of 200,000 K, wherein an isotherm is defined as the line perpendicular to the Planckian locus, said light (306,334) having a maximum color chromaticity shift of Δuv≦±0.10 from the Planckian locus;
• the second LED package comprises a second semiconductor LED and a second wavelength converting element, wherein the second semiconductor LED, when activated, generates light comprising a second dominant wavelength λ2 and wherein at least a portion of the light generated by the second semiconductor LED is incident on the second wavelength converting element and is re-emitted with a second converted optical spectrum comprising a second dominant converted wavelength λC2 such that λ2<λC2, wherein the second converted optical spectrum is different than the first converted optical spectrum and λC1≦λC2, and wherein the color chromaticity of light emitted by the second light emitting package resides in a 1960 CIE Uniform Colour Space bounded by an upper isotherm at a correlated color temperature of T2 K and a lower isotherm bounded at the correlated color temperature of 1,000 K, said light having a maximum color chromaticity shift Δuv≦±0.10 from the Planckian locus, wherein the correlated color temperature point of the intersection of the isotherm T1 K with the Planckian is greater than or equal to T2 K;
• and,
• the third LED package comprises a third semiconductor LED which, when activated, generates light comprising a third dominant wavelength λ3 which satisfies the criteria λ1,λ2<λ3<λC1,λC2 and 485 nm≦λ3≦595 nm, wherein each of the first, the second and the third semiconductor LED comprise the same semiconductor material system, and
• a control system for managing activation properties of at least one of the first, second and third LED packages in the light emitting module when activated, the control system comprising an interface for connection to external sources and for receiving information from the external sources, wherein the control system is adapted to manage the activation properties to achieve a predefined color chromaticity and CRI for the total light emitted by the light emitting module.

A method of manufacturing a light emitting system, the method comprising the steps of:

• assembling a light emitting module by providing first, second, and third light emitting device (LED) packages and attaching them to a sub-mount;
• assembling a control system comprising an interface for connection to external sources and for receiving information from the external sources, wherein the control system is adapted to manage activation properties of at least one of the first, second, and third light emitting packages in the light emitting module to achieve a predefined color chromaticity and CRI for the total light emitted by the light emitting module;
• and
• interfacing the control system to the light emitting module,
• wherein:
• the first LED package comprises a first semiconductor LED and a first wavelength converting element, wherein the first semiconductor LED, when activated, generates light comprising a first dominant wavelength λ1 and wherein at least a portion of the light generated by the first semiconductor LED is incident on the first wavelength converting element and is re-emitted with a first converted optical spectrum comprising a first dominant converted wavelength λC1 such that λ1<λC1 wherein the color chromaticity of light emitted by the first light emitting package resides in a 1960 CIE Uniform Colour Space bounded by a lower isotherm at a correlated color temperature of T1 K and an upper isotherm at a correlated color temperature of 200,000 K, wherein an isotherm is defined as the line perpendicular to the Planckian locus, said light (306,334) having a maximum color chromaticity shift of Δuv≦±0.10 from the Planckian locus;
• the second LED package comprises a second semiconductor LED and a second wavelength converting element, wherein the second semiconductor LED, when activated, generates light comprising a second dominant wavelength λ2 and wherein at least a portion of the light generated by the second semiconductor LED is incident on the second wavelength converting element and is re-emitted with a second converted optical spectrum comprising a second dominant converted wavelength λC2 such that A2<λC2, wherein the second converted optical spectrum is different than the first converted optical spectrum and λC1≦λC2, and wherein the color chromaticity of light emitted by the second light emitting package resides in a 1960 CIE Uniform Colour Space bounded by an upper isotherm at a correlated color temperature of T2 K and a lower isotherm bounded at the correlated color temperature of 1,000 K, said light having a maximum color chromaticity shift Δuv≦±0.10 from the Planckian locus, wherein the correlated color temperature point of the intersection of the isotherm T1 K with the Planckian is greater than or equal to T2 K;
• and,
• the third LED package comprises a third semiconductor LED which, when activated, generates light comprising a third dominant wavelength λ3 which satisfies the criteria λ1,λ2<λ3<λC1,λC2 and 485 nm≦A3≦595 nm, wherein each of the first, the second and the third semiconductor LED comprise the same semiconductor material system.