CPC F21K 9/232 (2016.08) [H05B 45/20 (2020.01); F21Y 2113/13 (2016.08); F21Y 2115/10 (2016.08)] | 15 Claims |
1. A light emitting diode filament for providing LED filament light, comprising:
a first linear array of LEDs arranged on a first surface of a carrier including only first LEDs configured to emit first white light,
a second linear array of LEDs arranged on a second surface of the carrier, opposite to said first surface, including only second LEDs configured to emit color controllable light,
wherein the LED filament light comprises the first white light and the color controllable light,
wherein the first LEDs comprise UV LEDs emitting UV light and/or blue LEDs emitting blue light, the UV LEDs and/or blue LEDs being covered by a first encapsulant comprising a luminescent material configured to at least partly convert the UV light and/or the blue light into converted light, wherein the white light comprises (i) the converted light and optionally (ii) the non-converted UV light and/or the non-converted blue light, wherein the first LEDs have a first pitch,
wherein the second linear array of LEDs comprises a plurality of M groups, each group comprising a red LED, a green LED and a blue LED, wherein the second LEDs and have a second pitch, and
wherein the first pitch is different from the second pitch.
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