Linear solid-state lighting with a double safety mechanism free of shock hazard
AssigneeLightel Technologies, Inc.
InventorsChungho Hsia, Pai-Sheng Shen, Ching-Feng Lin
Life of this patent
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Abstract
A linear light-emitting diode (LED)-based solid-state lamp having a double safety mechanism that comprises at least three shock protection switches, fully protects a person from possible electric shock during re-lamping or maintenance. One protection switch provided at each end of the lamp is able to cut off power when the associated end of the lamp is not inserted into the lamp socket. A third protection switch can be used to turn off the power from the AC main for additional shock protection.
Claims16
A linear light-emitting diode (LED) tube lamp, comprising:
- a housing having two ends;
- a light-emitting diode printed circuit board (LED PCB) fixed between the two ends of the housing, the LED PCB having a plurality of LEDs fixed thereon;
- an LED driver that powers the plurality of LEDs on the LED PCB, the LED driver having two inputs;
- two lamp bases respectively connected to the two ends of the housing, each lamp base comprising an end face and a bi-pin with two pins protruding outwards through the end face;
- and
- a utility shock protection switch, wherein
- when the utility shock protection switch is actuated, the two bi-pins are electrically connected with the two inputs of the LED driver, respectively, and
- when the utility shock protection switch is unactuated, the two bi-pins are electrically disconnected from the two inputs of the LED driver.
A linear light-emitting diode (LED) tube lamp, comprising:
- a housing having two ends;
- a light-emitting diode printed circuit board (LED PCB) fixed between the two ends of the housing, the LED PCB having a plurality of LEDs fixed thereon;
- an LED driver that powers the plurality of LEDs on the LED PCB, the LED driver having two inputs;
- a utility shock protection switch;
- and
- two lamp bases respectively connected to the two ends of the housing, each lamp base comprising an end face, a bi-pin with two pins protruding outwards through the end face, and an end shock protection switch connected with the utility shock protection switch, wherein:
- when the bi-pin is inserted into a lamp socket, the end shock protection switch is actuated to electrically connect the bi-pin with the utility shock protection switch;
- when the end shock protection switch is unactuated, the bi-pin is electrically disconnected from the utility shock protection switch,
- wherein when the utility shock protection switch is actuated, the two end shock protection switches are electrically connected with the two inputs of the LED driver, respectively, and
- when the utility shock protection switch is unactuated, the two end shock protection switches are electrically disconnected from the two inputs of the LED driver,
- and wherein the two bi-pins are respectively connected with the two inputs of the LED driver only if the two end shock protection switches and the utility shock protection switch are actuated.
Dependencies are inferred from the claim text.