US 12,460,779 B2
Retrofit tubular lamp with single switch device
Zhaoting Li, Shanghai (CN); Xiujuan Wu, Shanghai (CN); Deyong Kong, Shanghai (CN); Xiangdong Zhang, Shanghai (CN); Yuafen Cheng, Shanghai (CN); Zhengyu Wang, Shanghai (CN); Xiaolin Chen, Shanghai (CN); and Borong Su, Eindhoven (NL)
Assigned to SIGNIFY HOLDING B.V., Eindhoven (NL)
Appl. No. 18/682,223
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Jul. 18, 2022, PCT No. PCT/EP2022/069993
§ 371(c)(1), (2) Date Feb. 8, 2024,
PCT Pub. No. WO2023/016756, PCT Pub. Date Feb. 16, 2023.
Claims priority of application No. PCT/CN2021/111579 (WO), filed on Aug. 9, 2021; and application No. 21195887 (EP), filed on Sep. 10, 2021.
Prior Publication US 2025/0129900 A1, Apr. 24, 2025
Int. Cl. F21K 9/27 (2016.01); F21K 9/278 (2016.01); H05B 45/357 (2020.01); H05B 45/37 (2020.01); H05B 47/155 (2020.01)
CPC F21K 9/278 (2016.08) [H05B 45/37 (2020.01); H05B 47/155 (2020.01)] 16 Claims
OG exemplary drawing
 
1. A retrofit tubular lamp configured for use with any one of a first type of power source and a second type of power source at a time, comprising:
an input interface comprising a first end and a second end, wherein the retrofit tubular lamp is adapted to be connected to the first type of power source via both of the first end and the second end, and the retrofit tubular lamp is adapted to be connected to the second type of power source via the first end alone,
a converter coupled to the first end;
a light emitting arrangement coupled to the converter as well as to the first end and the second end; and
a single switch device connected between the first end, the light emitting arrangement, and the second end, configured to be operable in at least a first switching state and a second switching state, wherein:
when operating in the first switching state and when the first type of power source is connected to the input interface, the single switch device is configured to provide a first current path between the first end and the second end of the input interface and supply power to the light emitting arrangement whilst decoupling the converter therefrom; and
when operating in the second switching state and when the second type of power source is connected to the first end of the input interface alone, the single switch device is configured to provide power to the light emitting arrangement via the converter, and create a safety creepage between the first end and the second end of the input interface such that the first end and the second end of the input interface are electrically disconnected.