US 12,144,074 B2
Ambient light detection by means of two light sensors arranged within a luminaire
Frank Horn, Engi (CH); Huang Pengcheng, Zürich (CH); Roger Kistler, Ennenda (CH); Thomas Kuch, Richterswil (CH); Markus Künzli, Glarus (CH); Eduardo Pereira, Siebnen/SZ (CH); Hans Schlumpf, Schänis (CH); and John Schönberger, Altendorf (CH)
Assigned to Tridonic GmbH & Co KG, Dornbirn (AT)
Appl. No. 17/801,366
Filed by Tridonic GmbH & Co KG, Dornbirn (AT)
PCT Filed Feb. 16, 2021, PCT No. PCT/EP2021/053775
§ 371(c)(1), (2) Date Aug. 22, 2022,
PCT Pub. No. WO2021/170455, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 10 2020 104 754.1 (DE), filed on Feb. 24, 2020.
Prior Publication US 2023/0077494 A1, Mar. 16, 2023
Int. Cl. H05B 45/10 (2020.01); H05B 45/12 (2020.01); H05B 47/11 (2020.01)
CPC H05B 45/12 (2020.01) [H05B 47/11 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A luminaire (1) comprising:
a housing (2) having a diffusion panel (3) as a light emission surface,
at least one illuminant (4) which is arranged within the housing (2) to emit light through the diffusion panel (3) to the area outside of the housing (2), and
comprising at least two light sensors (S1, S2) arranged within the housing (2), the light sensors being set up to detect light and output a respective detection value, wherein the at least two light sensors (S1, S2) have different detection regions (B1, B2) and are set up to detect incident light (Et) entering the housing through the diffusion panel (3),
at least the detection region of a first light sensor (S1) of the at least two light sensors (S1, S2) is such that light (Er2) emitted by the at least one illuminant (4) and reflected from at least one wall of the housing interior is detected; and
a processing device (6) that controls the brightness of the at least one illuminant (4) and determines ambient light in the vicinity the luminaire (1) on the basis of the detection values output by the at least two light sensors (S1, S2);
wherein the proportion of the detected light that originally emitted from the at least one illuminant (4) in the luminaire housing is deduced from the detection values from the at least two light sensors S1, S2, thereby enabling the level of ambient light in the vicinity of the luminaire to be determined.