Patent ID: 11913608
Assignee: SIGNIFY HOLDING B.V.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H | IPC F  H

Claim 0:
1. A light emitting diode, LED, filament arrangement comprising
at least one LED filament comprising a plurality of light emitting diodes, LEDs,
a plurality of first sections of the at least one LED filament, wherein the plurality of first sections is configured to emit light of a first colour temperature, CT1, and with a first intensity, I1, during operation, and
a plurality of second sections of the at least one LED
filament, wherein the plurality of second sections is configured to emit light of a second colour temperature, CT2, and with a second intensity, I2, during operation,
wherein at least one of CT1≠CT2 and I1≠I2 is fulfilled,
wherein the plurality of first sections and the plurality of second sections are arranged in an alternating manner along the length of the respective LED filament and at least two second sections of the plurality of second sections are adjacently arranged and arranged at least partially parallel to each other,
said LED filament arrangement further comprising an encapsulant at least partially enclosing the plurality of LEDs, wherein the encapsulant comprises at least one of a luminescent material configured to at least partly convert light emitted from the plurality of LEDs and a light scattering material configured to scatter light emitted from the plurality of LEDs, wherein the encapsulant comprises a first encapsulant portion and a second encapsulant portion,
wherein at least a first section of the plurality of first sections comprises the first encapsulant portion and at least a second section of the plurality of second sections comprises the second encapsulant portion, and
wherein at least one of:
the first encapsulant portion comprises a phosphor of a first phosphor type, P1, and the second encapsulant portion comprises a phosphor of a second phosphor type, P2, wherein P1≠P2,
the first encapsulant portion comprises a first thickness, T1, and the second encapsulant portion comprises a second thickness, T2, wherein T1≠T2, and
the first encapsulant portion comprises a phosphor with a first phosphor concentration, PC1, and the second encapsulant portion comprises a phosphor with a second phosphor concentration, PC2, wherein PC1≠PC2, is fulfilled, and
wherein a number of LEDs, dN1, per unit length, dL1, of the plurality of first sections, dN1/dL1, and a number of LEDs, dN2, per unit length, dL2, of the plurality of second sections, dN2/dL2, fulfil dN1/dL1≠dN2/dL2.