Abstract:
A method according to embodiments of the invention includes providing a plurality of LEDs attached to a mount. A filter is attached to at least one of the plurality of LEDs. A protective layer is formed over the filter. A reflective layer is formed over the mount. A portion of the reflective layer disposed over the protective layer is removed.
Abstract:
A phosphor converted Light Emitting Diode (LED), a lamp and a luminaire are provided. The phosphor converted LED 106 comprises a LED 102, a first luminescent material 166, a second luminescent material 164 and a third luminescent material 162. The LED 102 emits a first spectral distribution having a first peak wavelength in the blue spectral range. The first luminescent material 166 absorbs a portion of the light of the first spectral distribution and converts at least a portion of the absorbed light towards light of a second spectral distribution. The second spectral distribution has a second peak wavelength in the green spectral range. The second luminescent material 164 absorbs absorbing a portion of the light of the first spectral distribution and/or a portion of the second spectral distribution. The second luminescent material 164 converts at least a portion of the absorbed light towards lights of a third spectral distribution. The third spectral distribution has a third spectral width and has a third peak wavelength. The third luminescent material 162 absorbs a portion of the light of at least one of the first spectral distribution, second spectral distribution, and the third spectral distribution. The third luminescent material 162 converts at least a portion of the absorbed light towards light of a fourth spectral distribution. The fourth spectral distribution has a fourth spectral width and has a fourth peak wavelength. The third peak wavelength and the fourth peak wavelength are in the orange/red spectral range. The third peak wavelength is smaller than the fourth peak wavelength and the third spectral width is larger than the fourth spectral width.
Abstract:
The invention provides a lighting device configured to provide red lighting device light, the lighting device comprising: (i) a first light source configured to provide first light source light having a peak wavelength (λls); (ii) a first red luminescent material configured to absorb at least part of the first light source light and to convert into first red luminescent material light having a first red emission peak wavelength (λm1), the first red luminescent material having an excitation maximum (λx1); (iii) a second red luminescent material configured to absorb at least part of the first light source light and to convert into second red luminescent material light having a second red emission peak wavelength (λm2), the second red luminescent material having a second excitation maximum (λx2); and wherein the first luminescent material and the second luminescent material are Eu2+ based, and wherein λm1 λls.
Abstract:
A method according to embodiments of the invention includes providing a plurality of LEDs (60) attached to a mount (62). A filter (102) is attached to at least one of the plurality of LEDs. A protective layer (104) is formed over the filter. A reflective layer (74) is formed over the mount. A portion of the reflective layer disposed over the protective layer is removed.
Abstract:
A phosphor converted Light Emitting Diode (LED), a lamp and a luminaire are provided. The phosphor converted LED 106 comprises a LED 102, a first luminescent material166, a second luminescent material 164 and a third luminescent material 162. The LED 102 emits a first spectral distribution having a first peak wavelength in the blue spectral range. The first luminescent material 166 absorbs a portion of the light of the first spectral distribution and converts at least a portion of the absorbed light towards light of a second spectral distribution. The second spectral distribution has a second peak wavelength in the green spectral range. The second luminescent material 164 absorbs absorbing a portion of the light of the first spectral distribution and/or a portion of the second spectral distribution. The second luminescent material 164 converts at least a portion of the absorbed light towards lights of a third spectral distribution. The third spectral distribution has a third spectral width and has a third peak wavelength. The third luminescent material 162 absorbs a portion of the light of at least one of the first spectral distribution, second spectral distribution, and the third spectral distribution. The third luminescent material 162 converts at least a portion of the absorbed light towards light of a fourth spectral distribution. The fourth spectral distribution has a fourth spectral width and has a fourth peak wavelength. The third peak wavelength and the fourth peak wavelength are in the orange/red spectral range. The third peak wavelength is smaller than the fourth peak wavelength and the third spectral width is larger than the fourth spectral width.