Auxiliary arrangement for a LED tube lamp
AssigneeSignify Holding B.V.
InventorsHui Zhang, Zhaomin Meng
Life of this patent
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Abstract
An approach for providing an auxiliary arrangement for a LED tube lamp that adapts a DC voltage for a monitoring circuit of the LED tube lamp. In particular, a modulation circuit of the auxiliary arrangement modulates a DC supply voltage, for the LED tube lamp, to simulate one or more characteristics of an alternating mains supply voltage for which the LED tube lamp is adapted. Preferably the at least one electrical characteristic comprises one or more electrical characteristics configured to designed to be detected by a monitoring circuit of the LED tube lamp operating in a safety detection mode, to allow the monitoring circuit to start a safety detection using the DC supply voltage.
Claims15
An auxiliary arrangement for providing a DC supply voltage for driving an LED tube lamp in the absence, failure or disconnection of an alternating mains supply voltage for driving the LED tube lamp, said auxiliary arrangement comprising:
- an input interface configured to receive, from a DC voltage supply, an input DC voltage generated by the DC voltage supply in the absence, failure or disconnection of the alternating mains supply;
- an output interface for connecting to the LED tube lamp and for providing the DC supply voltage to the connected LED tube lamp;
- characterized in that the auxiliary arrangement comprises:
- a modulation circuit connected between the input interface and the output interface, the modulation circuit being configured to modulate the input DC voltage according to one or more modulation patterns, wherein said one or more modulation patterns are configured to control the DC supply voltage at the output interface to have at least one electrical characteristic the same as the alternating mains supply voltage, to thereby produce the DC supply voltage.
Dependencies are inferred from the claim text.