US 12,031,689 B2
Tubular device for fitting to a tubular light fitting
Gaoxian Jin, Eindhoven (NL); Zhaoting Li, Eindhoven (NL); Haimin Tao, Eindhoven (NL); and Raimundo De Heer Galisteo, Eindhoven (NL)
Assigned to SIGNIFY HOLDING B.V., Eindhoven (NL)
Appl. No. 17/922,359
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Apr. 29, 2021, PCT No. PCT/EP2021/061306
§ 371(c)(1), (2) Date Oct. 29, 2022,
PCT Pub. No. WO2021/228571, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. PCT/CN2020/089647 (WO), filed on May 11, 2020; and application No. 20179439 (EP), filed on Nov. 6, 2020.
Prior Publication US 2023/0175654 A1, Jun. 8, 2023
Int. Cl. F21K 9/278 (2016.01); F21K 9/272 (2016.01); H05B 45/3578 (2020.01); F21Y 115/10 (2016.01)
CPC F21K 9/278 (2016.08) [F21K 9/272 (2016.08); H05B 45/3578 (2020.01); F21Y 2115/10 (2016.08)] 15 Claims
OG exemplary drawing
 
1. A lamp, comprising:
an input adapted to be connected to a high frequency ballast for gas discharge lamps;
a light emitting unit, comprising LEDs, for receiving power from the input and establishing a LED on voltage across the LEDs when the LEDs are on;
at least one isolation switch coupled between the input and the light emitting unit; and
a power supply unit adapted to obtain power from the established LED on voltage and to use the power for powering the at least one isolation switch to close the switch and thereby electrically connect the input to the light emitting unit,
wherein the lamp is configured to:
be unable to establish the LED on voltage sufficient for the power supply unit to close the at least one isolation switch when the high frequency ballast is in a preheat state; and
establish the LED on voltage sufficient for the power supply unit to close the at least one isolation switch when the high frequency ballast is in a later state after the preheat state.